JP2000297564A - Handle lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handle lock hardly misused and provided with an easily turnable latch head. SOLUTION: In a casing 12, a cam element 40 is installed rotationally. A cam plate 42 in the cam element 40 is engaged with one of cam grooves formed on the front and back faces of a latch head 30 so as to convert a rotational action to a projecting/retracting action of the latch head 30. The cam plate 42 abuts to an elastic claw 74 so as to be restricted in the rotation area, and an engaging condition with the cam groove 36 is maintained, so that the latch head 30 is prevented from coming off from the casing 12. The elastic claw 74 is pressed downward by means of a flat-tip screwdriver inserted from an oblong hole, and when the cam element 40 is turned, the cam plate 42 exceeds the elastic claw 74 for releasing engaging condition between the cam groove 36 and the cam element 40, and consequently, the latch head 30 is pulled out and can be turned reversely. Operation can be facilitated because only elastic deformation of the elastic claw 74 is required. In addition, the lock is not misused because the oblong hole is positioned on the inside of a housing part 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a handle lock for a one-sided door.

[0002]

2. Description of the Related Art As shown in FIGS. 11 to 13, a handle lock 82 for a one-sided door is provided with a seat (shown in FIG. There is a case where the direction of the inclined surface 86A of the latch head 86 to be fitted with (omitted) can be reversed at the construction site.

That is, a slotted screwdriver 78 is inserted into a vertically long hole 94 formed in a front plate 92 fixed to a vertical frame 90 of a door 88, and a stopper piece 96 is pushed up to release a locked state of a latch cover 98 with a groove 100. Then, the latch head 86 is rotated together with the latch cover 98 by being picked up with a finger, and the inclined surface 86A is turned back and forth.

However, since the vertically long holes 94 formed in the front plate 92 are exposed on the side surfaces of the vertical frame 90 of the door 88, there is a risk of mischief. In addition, since the locked state is released by prying up the stopper piece 96 with the flathead screwdriver 78, the workability is poor.
Further, since the vertically long holes 94 are widened, the appearance is deteriorated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described circumstances, and has as its object to provide a handle lock which is less likely to be mischievous and can easily change the direction of a latch head.

[0006]

According to the first aspect of the present invention, the casing is housed in a storage portion which is recessed in the vertical frame of the door. The latch head protrudes from the casing,
When the door is closed, it engages with the seat mounted on the vertical frame to lock the door.

[0007] A cam body operated by a handle from the outside of the casing is rotatably attached to the casing. The cam body engages with a cam groove formed in the latch head to convert a rotation operation into an operation of retracting and retracting the latch head to lock or unlock the door.

Further, the rotation range of the cam body is regulated by the holding means, and the engagement state with the cam groove is maintained. Therefore, the latch head does not fall out of the casing. On the other hand, the holding means releases the restriction on the rotation range of the cam body by the releasing means with the casing removed from the storage section. Thus, when the cam body is rotated to a predetermined position, the engagement state with the cam groove is released, and the latch head can be pulled out of the casing.

That is, if the latch head is pulled out and the direction of the inclined surface of the latch head is reversed, it can be adapted to a door type such as an outward opening or an inside opening at a construction site.

Further, since the release means cannot be operated unless the casing is removed from the storage portion, it is possible to prevent mischief after the mounting is completed. The expression "the casing must be removed from the storage section" means both the operation of the release means before storing the casing in the storage section and the operation of removing the stored casing and operating the release means.

According to the second aspect of the present invention, the holding means comprises:
An elastic claw that protrudes into the rotation trajectory of the cam body and locks the cam body, and the releasing means is a long hole that is inserted into a side wall of the casing and that allows a jig for elastically deforming the elastic claw to be inserted. .

In this configuration, when a jig such as a screwdriver is inserted into the long hole and the elastic claw is pressed down while being elastically deformed, and the cam body is rotated, the cam body rides over the elastic claw and the cam groove and the cam body are connected. The engaged state is released.

That is, the operation of lifting the stopper or the like to release the locked state as in the related art is not required, and the operation is simple because only the elastic claw needs to be elastically deformed. Also, since the long hole is located inside the storage section,
It is not mischievous and looks good without being seen from the outside.

According to the third aspect of the present invention, the holding means and the releasing means are provided on the shaft portion of the handle connected to the cam body and the core portion provided on the side of the vertical frame of the door. And a deformed hole that regulates the rotation range.

In this configuration, the rotation range of the handle core is regulated by the modified hole provided on the side of the door frame.
The engagement range between the latch head and the cam body is maintained by restricting the rotation range of the cam body connected to the handle. Further, if the core of the handle is pulled out from the deformed hole, the cam body can rotate freely, so that the engagement state with the latch head can be released.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a handle lock 10 according to the present embodiment is designed to be stored in a storage portion 18 formed on a vertical frame 14 of a door 12.

A vertically long front plate 20 is provided on a front surface of a flat box-shaped casing 16 constituting the handle lock 10. At both ends of the front plate 20, through holes 22 are formed. A screw 24 is inserted into the through hole 22 and screwed into a screw hole 28 of a block 26 provided above and below the storage unit 18.

As a result, the casing 16 is
The front plate 20 is stored in the block 2
8 and the side of the vertical frame 14 and the front plate 20
Are flush with each other (see FIG. 3).

The front plate 20 is formed with a rectangular through hole 32 through which the latch head 30 protrudes and retracts. A guide groove 34 is cut in the inner wall of the through hole 32, and a guide rib 38 protruding from the side surface of the latch head 30 is engaged to smoothly move the latch head 30.

The rear end side of the latch head 30 is substantially V-shaped, and a cam groove 36 is formed from the vicinity of the valley of the constriction to the front end side. In this cam groove 36,
As shown in FIG. 4, the fan-shaped cam plate 42 projecting from the cam body 40 is engaged, and the rotational movement of the cam body 40 is changed to the sliding operation of the latch head 30.

Further, on the rear end face of the latch head 30,
An annular groove 46 for holding one end of the spring 44 is formed. The other end of the spring 44 is locked in an annular groove 48 formed in the inner wall of the casing 16 and urges the latch head 30 in a direction to push the latch head 30 out of the casing 16.

An inclined surface 30A is formed at the tip of the latch head 30. The inclined surface 30A is used for an inwardly-opening door that closes the door 12 to the back of the paper in the orientation as shown in FIG. 1 (see FIG. 12), and FIGS.
Is used for an outwardly opening door that closes the door 12 toward the front of the drawing (see FIG. 11).

That is, when the door 12 is closed, the inclined surface 30 A of the latch head 30 hits a seat (not shown) attached to the vertical frame, and the latch head 30 is pressed against the urging force of the spring 44 so that the casing 16 is closed. Back into
When the door 12 is completely closed, the latch head 30 enters a lock hole (not shown) of the seat to lock the door 12.

On the other hand, the cam body 40 is rotatably attached to the casing 16. A square through hole 33 is formed in the core of the cam body 40, and a square pillar shaft 5 is formed through a seat cover 50 attached to the front of the vertical frame 14.
2 penetrates. A substantially L-shaped handle 54 is attached to both ends of the shaft 52. By turning the handle 54 to rotate the cam body 40 counterclockwise, a latch head is inserted through a lock hole (not shown) of the vertical frame. 30 can be pulled out.

A bracket 56 projects from the core of the cam body 40 in the radial direction. A locking pin 58 is provided upright on the bracket 56. As shown in FIGS. 4 and 5, one end of a coil spring 60 is in contact with the locking pin 58. The center of the coil spring 60 is mounted on a shaft 62 provided on the casing 16, and the other end of the coil spring 60 contacts the inner wall of the front plate 20.

With this configuration, a rotational force in the counterclockwise direction is applied to the cam body 40 to urge the latch head 30 in a direction of pushing the latch head 30 out of the casing 16 and to handle the lever 5.
Position 4 is horizontal.

A lock plate 64 projects radially from the core of the cam body 40. The tip of the lock plate 64 is cut into a V-shape to form a lock portion 66. The lock portion 66 can be fitted with a lock stopper 68 rotatably supported by the casing 16.

A square hole 70 is formed in the core of the lock stopper 68, and a lock button 72 is fixed through the seat cover 50. Then, when the lock button 72 (see FIG. 1) is turned counterclockwise at the position of the cam body 40 shown in FIG.
To lock the latch head 30 so that the cam body 40 cannot rotate.

On the other hand, the side wall of the casing 16 is cut out in a U-shape to form an elastic claw 74 which can bend to the back side of the drawing. As shown in FIG. 7, the elastic claw 74 is inclined upward toward the free end side, and a stopper wall 74A is provided at the top. Also, the stopper wall 74A
It is inclined downward from the border.

As shown in FIG. 5, when the latch head 30 protrudes, the side surface of the cam plate 42 hits the stopper wall 74A, thereby restricting the rotation range of the cam body 40. This prevents the latch head 30 from falling off.
A groove 74 </ b> B is formed in the upper part of the elastic claw 74, and a tip of a flathead screwdriver 78 inserted from a long hole 76 formed in a side wall of the casing 16 can be engaged with the groove 74 </ b> B.

Next, the operation of the handle lock 10 according to the present embodiment will be described.

As shown in FIG. 3 and FIG.
Is rotated clockwise as shown by a two-dot chain line, the cam body 40 rotates clockwise. For this reason, the cam groove 36
The cam plate 42, which has been engaged with, moves the latch head 30 to the right side against the urging force of the coil spring 60 and the spring 44 to release the lock. Then, if the handle 54 is pressed as it is, the door 12 opens.

When the handle 54 is released, the handle 54 assumes the horizontal position shown by the solid line by the urging force of the coil spring 60 and the spring 44, and the latch head 30 protrudes from the casing 16.

Here, as shown in FIG. 1 and FIG. 2, when it is desired to change the door 12 from the inside opening type to the outside opening type at the construction site, the shaft 52 together with the handle 54 is used.
Is removed, the screw 24 is removed, and the casing 16 is removed from the storage portion 18. Next, the tip of the flathead screwdriver 78 is inserted into the elongated hole 76, and is engaged with the groove 74B as shown in FIGS.

When the shaft 52 is inserted into the through hole 33 of the cam body 40 and the handle 54 is rotated counterclockwise, the cam plate 42 rides on the stopper wall 74A. When the minus screwdriver 78 is pulled out and the handle 54 (see FIG. 2) is further rotated as shown in FIG. 6, the cam plate 42 comes out of the cam groove 36, and the latch head 30 can be pulled out of the casing 16.

Here, as shown in FIG. 2, when the latch head 30 is turned upside down, the inclined surface 30A faces toward the front of the paper. Thereby, the handle lock 10 suitable for the door 12 that opens outward is obtained. In this way, the casing 16 is
8 as long as it is not removed from the inclined surface 3 of the latch head 30.
Since the direction of 0A cannot be changed, it is difficult to mischief. In addition, the operation of the elastic claw 74 is simple because it is only necessary to turn the push-down handle 54.

Next, when the latch head 30 with the inclined surface 30A inverted is housed in the through hole 32 and the handle 54 is turned clockwise, the cam plate 42 passes while pushing down the elastic claws 74, as shown in FIG. As described above, it engages with the cam groove 36 of the latch head 30. At this time, the elastic claw 74 is restored, returns to the original position, and is located on the rotation locus of the cam plate 42, so that the rotation range of the cam body 40 is regulated again. Since the guide ribs 38 and the cam grooves 36 are formed on both sides of the latch head 30, no inconvenience occurs even when the latch head 30 is inverted.

In the present embodiment, the cam grooves 36 are formed on the front and back surfaces of the latch head 30.
If it is made rotatable (of course, the tip portion that cannot be rotated unless the latch head is pulled out of the casing), the cam groove 36
May be formed on one surface, so that processing is facilitated.

As shown in FIGS. 9 and 10, the core 102 of the handle 54 fixed to the shaft 52 is used as a holding means and a releasing means.
The inner shape of the modified hole 104 (formed on the seat cover 50) into which the core portion 102 is rotatably inserted is an arc portion 104A and a straight portion 104B that bites inward. And the rotation range of the handle 54 is θ
Can be suppressed.

As described above, by restricting the rotation range of the handle 54, the rotation range of the cam plate 42 is restricted, and the latch head 30 does not come off.

[0041]

According to the present invention having the above-described structure, there is little possibility of misalignment, and the direction of the latch head can be easily changed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a handle lock according to the present embodiment.

FIG. 2 is an exploded perspective view showing a state where the latch head of the handle lock according to the embodiment is inverted.

FIG. 3 is a perspective view showing a state where the handle lock according to the embodiment is assembled to a door.

FIG. 4 is a side view in which the handle lock according to the present embodiment is partially broken.

FIG. 5 is a side view in which the handle lock according to the present embodiment is partially broken.

FIG. 6 is a side view in which the handle lock according to the present embodiment is partially broken.

FIG. 7 is a cross-sectional view illustrating a relationship between an elastic claw and a cam plate.

FIG. 8 is a cross-sectional view illustrating a relationship between an elastic claw and a cam plate.

FIG. 9 is a schematic view showing a relationship between a handle as a holding means and a releasing means and a seat cover.

FIG. 10 is a schematic view showing a relationship between a handle as a holding means and a releasing means and a seat cover.

FIG. 11 is a conceptual diagram showing an outward opening door.

FIG. 12 is a conceptual diagram showing an inward opening door.

FIG. 13 is an exploded perspective view of a conventional handle lock.

[Explanation of symbols]

 Reference Signs List 16 casing 30 latch head 36 cam groove 40 cam body 42 cam plate (cam body) 54 handle 74 elastic claw (holding means) 76 long hole (release means) 102 core (holding means, release means) 104 deformed hole (holding means) , Release means)

Claims (3)

[Claims] 1. A casing that fits in a storage recessed in a vertical frame of a door, a latch head that protrudes and retracts from the casing, and fits with a seat attached to a vertical frame when the door is closed, and the latch. A cam groove formed in the head; a cam body rotatably attached to the casing, which engages with the cam groove and converts a rotation operation into a retracting operation of a latch head; and A handle to be operated; holding means for restricting a rotation range of the cam body to hold an engagement state with the cam groove; and A handle lock, comprising: releasing means for releasing the rotation range restriction to release the engagement state between the cam body and the cam groove. 2. The apparatus according to claim 1, wherein the holding means is an elastic claw that protrudes onto a rotation locus of the cam body and locks the cam body, and the releasing means is provided on a side wall of the casing to elastically deform the elastic claw. The handle lock according to claim 1, characterized in that the handle lock is a long hole into which a jig to be inserted can be inserted. 3. The method according to claim 1, wherein the holding means and the releasing means are provided on a shaft portion of the handle connected to the cam body, and are provided on a side of a vertical frame of the door, and the core portion is inserted therethrough. The handle lock according to claim 1, wherein the handle lock comprises a modified hole that regulates a rotation range.