JPH0820923A - Chewing gum remover - Google Patents

Abstract

PURPOSE:To effectively remove chewing gum spewed to a objective surface to be kept clean such as floor surfaces of a building, walking streets of an underground market in a station and platforms and stiffly adhered thereto. CONSTITUTION:A cover 4 with an opening of the lower end for covering chewing gum 14 adhered to an objective surface 13 such as a floor surface, etc., is provided to the lower end of a vertical cylindrical main body 1. A nozzle 12 for injecting cooling gas downward is provided to the upper part of the central section of the cover 4, and a power driving crusher 15 provided with a large number of crushing devices 16 moving back and forth toward the chewing gum 14 is provided to the circumference of the inside of the cover 4. A suction port 11 for sucking the crushed chewing gum is provided, a cooling gas cylinder 20 is provided to the inside of the main body 1, and an exhaust duct 5 connected to the suction port 11 is connected to a suction port of a vacuum cleaner with a flexible hose.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removal device for efficiently removing chewing gum that has been discharged and hard adhered to a target surface such as a floor of a building, a platform of a station, or a walking path of an underground mall that requires aesthetics.

[0002]

2. Description of the Related Art As a device for removing a chewing gum as described above, a device described in Japanese Utility Model Laid-Open No. 5-16821 injects a flammable gas and ignites it to heat a metallic spatula, It peels off while melting the chewing gum with heat.

In Japanese Utility Model Laid-Open No. 3-105986, a cooling gas is sprayed onto a chewing gum adhering to a target surface to remove the heat of vaporization from the chewing gum to cool and harden it, resulting in a hard and brittle state. It is to be peeled off with a spatula prepared separately in.

[0004]

Among the above-mentioned conventional techniques, the one described in Japanese Utility Model Laid-Open No. 5-16821 can remove the chewing gum dissolved at a high temperature to some extent, but the dissolution increases the adhesive strength. There is a problem that it takes a considerable amount of time to completely remove it.

Further, the one described in Japanese Utility Model Laid-Open No. 3-105986 is supposed to be easier to remove than the heating method because it is cooled and hardened, but since the apparatus is small and handheld, the removal work is Since it is necessary to bend the lower back, there is a problem that the worker is likely to have a backache.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a device which can be operated standing or unattended and which automatically performs cooling and removing operations.

[0007]

In order to solve the above-mentioned problems, the present invention is provided at the lower end of a portable vertically-oriented cylindrical main body,
A cover for the lower end opening that covers the chewing gum attached to the target surface such as the floor surface is provided, and a nozzle for injecting cooling gas is provided at the upper center of this cover downward, and the periphery of the cover moves toward the chewing gum. A power-driven crusher having a large number of crushers is provided, a suction port for sucking the crushed chewing gum is provided, and a cooling gas cylinder for supplying cooling gas to the nozzle is provided in the main body. An exhaust duct leading to the suction port is provided, and this exhaust duct has a structure in which it is connected to the suction port of a vacuum cleaner installed outside the main body with a flexible hose, a guide tube that can be raised and lowered in the center of the main body, and this guide. Cylinder elevating means is provided, and a positioning rod is mounted on the guide barrel so that it can be raised and lowered, and the positioning rod is pushed onto the guide barrel. Release spring, the locking piece that locks the positioning rod that has reached the upper limit by the action of the spring, and the locking piece that unlocks the positioning rod when the guide tube falls to the lower limit. Means, and further, an opening is provided in the center of the upper part of the cover of the lower part of the main body, the nozzle can be retracted toward this opening, and the positioning rod is projected downward under the condition that the nozzle is retracted into the main body. The chewing gum is configured to be positioned on the target surface, or a moving platform that moves in the front-back direction by the drive means is provided on a carriage that freely travels on the target surface, and chewing gum that adheres to the target surface is detected underneath. 2. A plurality of optical sensors are arranged in a row in a row, and a horizontal table is provided on the movable table, the horizontal table being movable in the left-right direction by a driving means.
Provided is such that a main body having a built-in chewing gum removing device described above is mounted so as to be able to move up and down, and a control device that drives a moving table and a traverse table to move the main body to the position of the chewing gum detected by the optical sensor is provided. .

Also provided is an apparatus for spraying dry ice pellets instead of the cooling gas to remove the chewing gum.

[0009]

In the device of the first aspect of the invention, the lower chewing gum cover is covered with the target chewing gum, the cooling gas is injected from the nozzle by the operation of a push-button switch, and the chewing gum is cooled and hardened. When the cleaner is activated, the hardened chewing gum is crushed and sucked off by the cleaner.

Further, in the second invention, when the lower end of the positioning rod protruding from the cover is applied to the center of the chewing gum and the main body is pushed down, the chewing gum comes to the correct position, and in this state, in the same order as in the first invention. Remove the chewing gum.

In the case of the third invention, when the cart is run and the optical sensor detects the chewing gum, the cart stops, the movable table and the traverse stand move toward the chewing gum, the main body is lowered, and the cover at the lower end is removed. After covering the chewing gum and removing the chewing gum with the same effect as other inventions,
Return the moving stand, the traverse stand and the main unit to their original positions, and the carriage will start running.

According to a fourth aspect of the present invention, dry ice pellets are sprayed on the chewing gum instead of the cooling gas, the chewing gum is crushed by collision of the pellets, and the crushed pieces are sucked and removed by a vacuum cleaner.

Also, in the fifth aspect of the invention, like the second aspect of the invention, when the lower end of the positioning rod protruding from the cover is applied to the center of the chewing gum and the main body is pushed down, the chewing gum comes to the correct position, and in this state, The chewing gum removal work is performed by the same operation as the invention of 4.

In the case of the sixth invention, as in the case of the third invention, when the cart is run and the optical sensor detects the chewing gum, the cart stops, the movable table and the traverse stand move toward the chewing gum, and the main body is lowered. Then, the lower end cover is covered with the chewing gum, the chewing gum is removed by the same operation as the fourth and fifth inventions, and then the movable table, the traverse table and the main body are returned to the original state, and the traveling of the cart starts.

[0015]

Embodiment 1 In Embodiment 1 shown in FIGS. 1 and 2, reference numeral 1 is a main body having a cylindrical shape, a handle 2 is integrally provided on an upper end thereof, and a handle 3 is provided on the upper end thereof. The lower end of the main body 1 is open, and the cover 4 is fixed inside the main body 1. This cover 4
As is apparent from FIG. 2, the center of the lower end is opened as an opening 9 and the center of the upper end communicates with the exhaust duct 5.

The exhaust duct 5 projects outside the main body 1 and is connected to a suction port 8 of a vacuum cleaner 7 by a flexible hose 6 as shown in FIG. The numeral 10 in FIG. 1 is the vacuum cleaner 7 described above.
However, the power source of the cleaner 7 may be used for both direct and alternating current so that power can be taken from the power cord near the outlet.

The lower opening 9 of the cover 4 is surrounded by a plurality of suction ports 11. Further, a nozzle 12 for ejecting a cooling gas is fixed downward at the center upper part of the portion surrounded by the suction ports 11. The nozzle 12 is a wide-area nozzle that widely sprays the gas so that the cooling gas is ejected onto the entire surface of the gum 14 that is attached to the target surface 13 such as the floor surface and stepped on and spread out.

Reference numeral 15 is a plurality of crushers arranged above each suction port 11, and a plurality of flea-shaped, needle-shaped, spatula-shaped crushing tools 16 are driven by driving means 17 using an electromagnet or the like in the direction of the arrow in FIG. It reciprocates at a high speed, and its power source may be taken from the battery 10.

Reference numeral 20 is a cooling gas cylinder mounted in the main body 1 and is filled with a cooling gas such as liquid nitrogen, liquefied carbon dioxide gas, liquefied propane gas, and non-regulated Freon gas. A pipe 22 is connected to the upper end of the cylinder 20 via a valve 21, and the pipe 22 is connected to the nozzle 12. The valve 21 may be opened and closed by a push button type hand switch 23 provided on the handle 3 as an electromagnetic valve using the battery 10 as a power source.

It is preferable that the crusher 15 and the cleaner 7 can be started and stopped by a push button type hand switch 24 provided on the handle 3. In addition, when an automatic control circuit is provided and a push button type start switch is turned on, the crusher 15 and the vacuum cleaner 7 may be activated after the cooling gas is injected from the nozzle 12 for a certain period of time.

In the case of the first embodiment, the gum 14 is placed on the target surface 13 such as the platform of the station, the passage in the building or the floor.
Then, the cover 4 is covered with the main body 1 so that the gum 14 is located at the center of the opening 9 at the lower end of the cover 4 at the lower end.

When the hand switches 23 and 24 are successively operated, the valve 21 is first opened for a certain period of time to inject the cooling gas in the cylinder 20 from the nozzle 12 to the entire surface of the gum 14. As described above, when the gum 14 is cooled and hardened, the valve 21 is closed, the vacuum cleaner 7 is activated, and the crusher 15 is operated.

As a result, each crushing tool 16 reciprocates at high speed to crush the hardened gum 14, and the crushed gum powder is sucked from each suction port 11 and vacuumed from the duct 5 through the hose 6. It is sucked into the suction port 8 of the cleaning device 7 and is stored in a dust bag inside the cleaning device 7.

In the first embodiment, the nozzle 12 is replaced with a shot blast nozzle having a structure for injecting dry ice pellets, and the nozzle is connected to a dry ice making machine (not shown) by a pressure feeding hose. It will be what you did.

In this case, since the chewing gum is crushed by the injection of the dry ice pellets and sucked into the suction port 11, the crusher is unnecessary.

The second embodiment shown in FIGS. 3 to 9 has a gum positioning device. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Only different points will be described. The L-shaped arm 19 with the nozzle 12 fixed to the tip is
In the main body 1 as shown in FIG.
A cover 6 is rotatably mounted on the cover 4 so that the cover 4 can be inserted into and removed from the cover 4 through an opening 27 provided at the center of the top of the cover 4.
Therefore, the pipe 22 between the nozzle 12 and the cylinder 20 is flexible. The exhaust duct 5 is provided eccentrically to the side of the opening 27.

A vertical positioning rod 30 is concentrically provided at the center of the opening 27. The rod 30 is mounted in a guide tube 31 which is mounted in the center of the main body 1 so as to be movable up and down. As shown in FIG. 8, the guide cylinder 31 is provided with a pair of protrusions 32 on the outer side, and by slidably engaging with a U-shaped guide 33 provided in the main body 1, the guide cylinder 31 is always coaxial with the main body 1. It is designed to be

As shown in FIG. 4, the rod 30 slidably penetrates through the center hole of the partition 34 fixed to the middle portion of the guide cylinder 31, and on this partition 34, the spring bearing 35 fixed to the rod 30 and the spring bearing 35 are fixed. A pressing spring 37 is mounted between the top plates 36 of the guide cylinder 31.

An umbrella-shaped action piece 39 is fixed in the middle of the rod 30 below the spring receiver 35, and an engagement / disengagement mechanism is provided in a part of the peripheral wall of the guide cylinder 31 directly below the partition 34. A stop piece 40 is provided.

The latter half of the locking piece 40 is a spring box 4 in a case 41 fixed to the outside of the guide cylinder 31, as shown in FIG.
2, and the receiving piece 43 provided at the intermediate portion of the locking piece 40 is pushed by the spring 44, so that the locking piece 40 is always held in a protruding shape.

An electromagnetic coil 45 is provided on the rear side of the spring box 42 as a means for releasing the locking piece 40.
When is excited, the rear portion of the locking piece 40 as an iron core is attracted and the locking piece 40 can be retracted against the spring 44.

Further, a part of the outer circumference of the receiving piece 43 is used as the working piece 4.
6, a limit switch 47 is provided in the case 41 so as to be projected to the outside from a part of the groove of the spring box 42 and to be actuated by the operating piece 46 when the locking piece 40 is retracted.

The shaft 26 rotates together with the arm 19. The crank 50 is fixed to one end of the shaft 26, and the crank 50 and the operating arm 51 above the crank 50 are connected to each other as shown in FIG.
Connect at 2. The operating arm 51 is swingably attached to a bracket 53 provided in the upper portion of the main body 1, and the tip of the arm 51 reaches the upper limit as shown in FIG.
It can be pushed up by the top plate 36 of 1.

Further, the arm 51 and a part of the inside of the main body 1 are provided with a pulling spring 54 which works to pull down the arm 51, and the arm 51 is inclined downward when the guide cylinder 31 is descending. To do. In the main body 1, the upper limit detection limit switch 5 that works on a part of the protrusion of the top plate 36 of the guide cylinder 31
5 and the limit switch 56 for lower limit detection are arranged vertically.

A rack gear 57 extending over substantially the entire length is fixed to a part of the outer circumference of the guide cylinder 31. Reference numeral 60 denotes a pinion gear that meshes with the rack gear 57. The pinion gear 60 moves forward and backward by the drive means 61 including a motor and a speed reducer attached to the main body 1 to move the guide cylinder 31 up and down through the rack gear 57.
The handlebar 3 shown in FIG. 3 is provided with a push button type start switch 62.

In the case of the second embodiment, when the main body 1 is lifted with the handle 3 and the start switch 62 is operated in the standby state of FIG. 3, the drive means 61 causes the pinion gear 60 to rotate normally and the rack gear 57 is used. The descent of the guide cylinder 31 is started.

When the guide cylinder 31 starts descending, the top plate 36
The actuating arm 51 that has been pushed up by is pulled down by the pulling spring 54. For this reason, the arm 19 pivots upward through the crank 50 connected to the connecting rod 52, and the nozzle 12 is disengaged from the opening 27 and positioned in the upper side.

When the guide cylinder 31 descends and reaches the lower limit as described above, the side projection of the top plate 36 causes the lower limit switch 56 to act, so that the driving means 61 stops and at the same time the electromagnetic coil 45 of FIG. Is excited for a short time and the locking piece 4
0 can be pulled in for a short time. Therefore, the action piece 39 that has been locked to this is disengaged from the locking piece 40. At this time, the action piece 46 of FIG. 9 pushes the limit switch 47, but the circuit is configured so that no signal is output from the switch 47 when the coil 45 is excited.

Therefore, the positioning rod 30 is lowered by the action of the pressing spring 37, and the lower end thereof projects below the main body 1. In this state, when the lower end of the rod 30 is applied to the center of the gum 14 on the target surface 13 as shown in FIG. 4 and the main body 1 is pushed down, the guide cylinder 31 goes down with respect to the rod 30 as shown in FIG. The action piece 39 passes through the engagement piece 40 while pushing the engagement piece 40 against the spring 44, and the engagement piece 40 restored by the spring 44.
Locked in.

When the locking piece 40 is retracted as described above, the operating piece 46 pushes the limit switch 47. At this time, however, the coil 45 is not excited, so the switch 47 is operated.
A signal is emitted from the drive means 61, and the drive means 61 reverses the pinion gear 60 in response to the signal.

As a result, the guide cylinder 31 rises and returns to the state shown in FIG. 3, and the nozzle 12 projects into the opening 27 as shown in FIG. When the hand switches 23 and 24 are sequentially operated in this state, the valve 21 is first opened for a certain period of time to cause the cooling gas in the cylinder 20 to flow from the nozzle 12 to the gum 1 as in the first embodiment.
4 to spray and harden the gum 14, then close the valve 21, activate the vacuum cleaner 7 and activate the crusher 15, and each crushing tool 16 reciprocates at high speed to cure the gum 14. Crushed, and this crushed gum powder is used for each suction port 1
1 is sucked from the duct 1, passes through the hose 6 from the duct 5, is sucked into the suction port 8 of the vacuum cleaner 7, and is housed in the dust bag inside the cleaner 7.

In the second embodiment, the nozzle 12 is replaced with a shot blast nozzle having a structure for injecting dry ice pellets, and the nozzle is connected to a dry ice making machine (not shown) by a pressure hose. It will be what you did.

Also in this case, since the chewing gum is crushed by the injection of the dry ice pellets and sucked into the suction port 11, the crusher is not necessary.

The third embodiment shown in FIGS. 10 to 12 is a self-propelled type, which is capable of manned operation and unmanned operation. In the third embodiment, 65 is a trolley, and left and right front wheels 66 can be freely steered left and right by a steering mechanism of various known mechanisms (not shown), and rear wheels 67 are self-propelled. The drive wheels can be rotated normally and reversely by a drive means 69 including a motor powered by a battery 68, a speed reducer, and a transmission means.

When manned, a worker is placed on the operation console 70 at the rear end of the carriage 65 and operates the manual operation handle 71 on the operation box 64 to steer the front wheels 77. When the front wheels 77 are power-driven using electromagnetic force or the like, a control circuit is provided in the operation box 64, and this circuit is operated by the handle 71. However, the handle 71 and the front wheel steering device may be mechanically connected.

In the case of an unmanned person, a plurality of obstacle sensors 72 utilizing ultrasonic waves, optical sensors, etc. are arranged in the surroundings to run on the target surface 13 while avoiding obstacles.

That is, in the operation box 64, an automatic control circuit having a function of automatically steering the front wheels 66 when the signal from the obstacle sensor 72 is received and directing the carriage 65 in the direction without the obstacle is provided.

Reference numeral 73 denotes a pair of left and right guide rails on the carriage 65. A front-rear direction moving base 74 is provided which moves forward and backward along the guide rails 73, and an electric type for moving the base 74 forward and backward is provided at the front of the carriage 65. A drive means 75 including a cylinder is provided.

A pair of left and right rotating shafts 76 are arranged on the moving table 74. The rotary shaft 76 is engaged with the traverse table 77 via a known ball screw, and the rotary shaft 76 is rotated forward and backward by the servo motor 78, whereby the traverse table 7 is rotated.
The structure is such that 7 moves left and right.

A plurality of downward photosensors 79 are provided side by side in a row at regular intervals on the lower part of the front of the movable table 74.
This optical sensor 79 is attached to the target surface 1 from the opening provided in the carriage 65.
Bring to the top 3.

A bracket 49 is provided near the front of the traverse table 77, and a driving means 59 such as a vertical electric cylinder is provided on the bracket 49.
The handle 2 on the main body 1 shown in FIG. 2 is moved up and down.

As shown in FIG. 12, the structure inside the main body 1 is exactly the same as the structure shown in FIG. Also, the vacuum cleaner 7 is a pedestal 77
A battery 68 is used as a power source for the cleaner 7, the driving means 17, 59, 75, and the servomotor 78, which are provided above.

In the third embodiment described above, the optical sensor 79 finds the gum 14 by running the dolly 65 on the object 13 with or without a person. In this case, the target surface 1
Focusing on that the gum 14 adhering to 3 is almost black due to dirt and dust, the gum 14 is detected by light and dark.

When each of the optical sensors 79 is of a reflected light type, when the light emitted from the sensor 79 while traveling on the target surface 13 reaches a black portion that hardly reflects the light, it is directly below the optical sensor 79 which does not receive the reflected light. Judge the position as gum 14 and operate box 6
The control circuit in 4 sends a stop signal to the drive means 69 to stop the traveling of the carriage 65.

Now, when the carriage 65 traveling in the direction of the arrow in FIG. 11 is stopped, if the third optical sensor 79 from the left facing in the direction of the arrow detects gum, the carriage 65 is moved.
The driving means 75 is driven by a signal from the control circuit at the same time when the
Works to move the moving table 74 forward, move the main body 1 to the stop position where the optical sensor array has been, and stop.

Next, both servo motors 78 rotate synchronously to rotate both rotary shafts 76, and the traverse stand 77 is inserted through the ball screws.
Is moved to stop the main body 1 on the gum 14, and at the same time, the driving means 59 works to lower the main body 1 to cover the gum 14 with the cover 4 as shown in FIG.

When a sensor (not shown) detects that the lower end of the cover 4 is in contact with the object 13, the valve 21 is first opened for a certain period of time to allow the cooling gas in the cylinder 20 to flow from the nozzle 12 to the entire surface of the gum 14. To cool and harden the gum 14, then close the valve 21, activate the vacuum cleaner 7 and operate the crusher 15 to reciprocate each crushing tool 16 at high speed to crush the hardened gum 14. Then, the crushed gum powder is sucked from each suction port 11 and then from the duct 5 to the hose 6.
After that, it is sucked into the suction port 8 of the vacuum cleaner 7 and is stored in the dust bag inside the cleaner 7.

After that, the vacuum cleaner 7 is stopped, the respective units are returned to their original positions by the actions of the driving means 59, 75 and the servo motor 78, and the carriage 65 starts traveling. These operations are controlled by the control circuit in the operation box 64.

In this third embodiment, the structure inside the main body 1 is replaced with a shot blast nozzle having a structure for injecting dry ice pellets as shown in FIG. 1, and this nozzle is pressure fed to a dry ice making machine (not shown). When connected by a hose, the structure described in claim 6 is obtained. In this case, the dry ice pellet manufacturing machine may be mounted on the trolley 65. Also, as in the other examples, the chewing gum is crushed by the injection of dry ice pellets and the suction port 11
No need for a crusher because it is sucked into.

[0060]

[Effect] According to the present invention, it is possible to inject the cooling gas from the nozzle and to crush or crush and collect the gum by the crusher by operating the switch while standing.
Workers no longer suffer from back pain.

Further, in the case of having a positioning rod, the center of the chewing gum can be easily aligned with the center of the cover at the lower end of the main body by this positioning rod, so that a cooling gas or dry ice pellets is sprayed over the entire chewing gum to completely complete the chewing gum. Can be crushed and removed.

Further, in the case where the movable carriage is provided with the optical sensor, it is not necessary to manually move the main body, and unmanned operation is possible. Therefore, there is an effect that unmanned chewing gum removal work can be performed at midnight.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of Example 1.

FIG. 2 is an enlarged vertical front view of the main part of the same as above.

FIG. 3 is a vertical sectional front view of the second embodiment.

FIG. 4 is an enlarged vertical sectional front view of the main part of the same as above.

FIG. 5 is an enlarged vertical sectional front view showing the same operation.

FIG. 6 is a vertical sectional front view showing the same as above.

FIG. 7 is an enlarged vertical sectional front view showing the operation of the same portion.

FIG. 8 is a transverse plan view of the same.

[Fig. 9] Enlarged longitudinal device near the locking piece

FIG. 10 is a vertical sectional side view of the third embodiment.

FIG. 11 is a plan view of the above.

FIG. 12 is an enlarged vertical side view of the main part of the same.

[Explanation of symbols]

 1 Main Body 4 Cover 5 Exhaust Duct 6 Flexible Hose 7 Vacuum Cleaner 8 Suction Port 9 Opening 11 Suction Port 12 Nozzle 13 Target Surface 14 Chewing Gum 15 Crusher 16 Crushing Tool 17 Driving Means 20 Cooling Gas Cylinder 27 Opening 30 Positioning Rod 31 Guide Tube 37 Pressing Spring 39 Working Piece 40 Locking Piece 44 Spring 45 Electromagnetic Coil 57 Rack Gear 59 Driving Means 60 Pinion Gear 61 Driving Means 69 Driving Device 74 Moving Table 75 Driving Means 77 Traverse Table 78 Servo Motor 79 Optical Sensor

Claims (6)

[Claims] 1. A cover of a lower end opening which covers a chewing gum attached to a target surface such as a floor is provided at a lower end of a portable vertically oriented main body, and a cooling gas is sprayed downward to an upper center portion of the cover. Provided with a nozzle to, provided with a power-driven crusher having a large number of crushing tools that advance and retreat toward the chewing gum around the inside of the cover, and a suction port for sucking the crushed chewing gum is provided in the main body. A cooling gas cylinder for supplying cooling gas to the nozzle is provided, and an exhaust duct communicating with the suction port is provided, and the exhaust duct is connected to a suction port of a vacuum cleaner installed outside the main body with a flexible hose to remove chewing gum. apparatus. 2. A vertically movable guide cylinder and an elevating means for the guide cylinder are provided in the center of the main body, and a positioning rod is mounted on the guide cylinder so as to be vertically movable. The push spring that pushes down the rod, the locking piece that locks the positioning rod that has reached the upper limit by the action of the spring, and the locking piece that unlocks the positioning rod by the locking piece when the guide tube falls to the lower limit. A releasing means is provided, and further, an opening is provided in the upper center of the cover of the lower part of the main body, the nozzle can be retracted toward this opening, and the positioning rod is projected downward under the condition that the nozzle is retracted into the main body. The chewing gum removing apparatus according to claim 1, wherein the chewing gum is positioned by performing the positioning. 3. A moving platform that moves in the front-back direction by a driving means is provided on a carriage that freely travels on the target surface, and a plurality of optical sensors that detect chewing gum adhering to the target surface are arranged in a row in a row below the moving platform. Side by side, a traverse table is provided on the movable table which is moved in the left-right direction by a driving means, and the main body incorporating the chewing gum removing device according to claim 1 is mounted on the traverse table so as to be movable up and down. The chewing gum removing device according to claim 1, further comprising a control device that drives a moving table and a traverse table to move the main body to the detected position of the chewing gum. 4. A cover of a lower end opening which covers a chewing gum attached to a target surface such as a floor is provided at a lower end of a portable vertically-oriented cylindrical main body, and a dry ice pellet is downwardly provided at a central upper portion of the cover. A shot blast nozzle for spraying is provided, and a suction port for sucking chewing gum crushed by dry ice pellets is provided in the cover.
An exhaust duct leading to the suction port is provided in the main body,
This exhaust duct is a chewing gum removal device that is connected to the suction port of a vacuum cleaner installed outside the main body with a flexible hose, and the dry ice pellet making machine installed outside the main body and the shot blast nozzle are connected via a pressure feed hose. 5. A guide tube which can be raised and lowered and a lifting means for the guide tube are provided in the center of the main body, and a positioning rod is mounted on the guide tube so as to be able to move up and down. The push spring that pushes down the rod, the locking piece that locks the positioning rod that has reached the upper limit by the action of the spring, and the locking piece that unlocks the positioning rod by the locking piece when the guide tube falls to the lower limit. A release means is provided, and an opening is provided in the center of the upper part of the cover of the lower part of the main body. The chewing gum removing device according to claim 4, wherein the chewing gum is positioned by projecting the positioning rod downward under the condition of being pulled in. 6. A movable table which is movable in the front-back direction by a driving means is provided on a carriage that freely travels on the target surface, and a plurality of optical sensors for detecting chewing gum adhering to the target surface are arranged in a row in a row below the movable table. Side by side, a traverse table that moves in the left-right direction by a drive means is provided on the movable table, and the main body incorporating the chewing gum removing device according to claim 4 is mounted on the traverse table so as to be vertically movable. The chewing gum removing device according to claim 4, further comprising a control device that drives a moving table and a traverse table so as to move the main body to the detected position of the chewing gum.