JPH0734747A - Lock device for door - Google Patents

Abstract

PURPOSE:To enable the locking/unlocking and opening/closing of a door of a power board housing box, etc., to make it possible to miniaturize the whole lock device and to make it possible to use the lock device for any door having various size. CONSTITUTION:The basic end of a lever 3 housed in a case 2 is pivoted on the case 2 through a lever shaft 4 so that the lever is capable of coming in and out, a cam 7 is fixed to the lever shaft 4, and a rack 11 pushed and driven by the cam 7 is provided in the case the lever shaft 4 is rotated. A square bar 14 is connected to a pinion 13 engaged with the rack 11, a hook 15 rotated and energized to a locking position by a spring 17 is connected to the square bar 14, the hook 15 hooked and unhooked on a receiving metal bar 19 of a fixed frame body 20 side, and a clearance interval is made between the rack 11 and cam 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device used for a door of a switchboard storage box or the like.

[0002]

2. Description of the Related Art In a conventional door lock device, an operation lever is projected from a front panel of the door, and it is necessary to secure a considerable space on the front side of the door for the operation of the lever. On the other hand, in the locking device in which the lever is not arranged so as to project from the front panel of the door, since it is necessary to provide the case with a recess for inserting a finger, the lateral width of the case is increased by the size of the recess for inserting the finger. It was necessary to prepare a large space for mounting.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to easily unlock and open / close a door of a switchboard storage box, etc., which enables downsizing of the entire apparatus, and is used for doors of various sizes. It is to provide a lock device that can be used.

[0004]

The door locking device of the present invention will be described below with reference to the reference symbols in the accompanying drawings. In the door locking device of the present invention, the base end of the lever 3 housed in the case 2 is retractable. 4, a rack 7 is pivotally mounted on the case 2, a cam 7 is fixed to the lever shaft 4, and a rack 11 that is pressed and driven by the cam 7 when the lever shaft 4 rotates is provided, and a square rod 14 is attached to a pinion 13 that meshes with the rack 11. Connect and spring 17
The hook 15 urged to rotate to the locking position by the square bar 14
The hook 15 is engaged with and disengaged from the receiving bar 19 on the fixed frame body 20 side.

Further, according to the present invention, the lever 3 is attached to the spring 6.
Is urged to rotate in the direction of retraction, and a protrusion 3a for protruding rotation operation is provided on the front side of the lever 3. Further, a play interval is set between the tip of the rack 11 and the cam 7.

[0006]

In this door lock device, the hook 15 is engaged with the receiving bar 19 on the side of the fixed frame 20 such as the box body when the door is closed and locked. When the protrusion 3 a of the lever 3 is pushed, the lever 3 is projected and rotated from the case 2 to an operable angle. When the lever 3 is pulled, the cam 7 rotates integrally with the lever shaft 4. At this time, since the play gap is set between the cam 7 and the rack 11, the force of the biasing spring 17 of the hook 15 is not directly transmitted to the lever, so that the lever 3 can be projected and operated with a small force.

Since the tip of the rack 11 is pushed by the rotated cam 7, the pinion 13 is rotated. The hook 15 is separated from the receiving rod 19 by rotating the square rod 14 integrally with the pinion 13. As a result, the lock of the door 1 with respect to the fixed frame body 20 is released, and the door 1 is opened by further pulling the lever 3.

When the door 1 is closed, the receiving rod 19 is brought into contact with the tip curved surface 15a of the hook 15, so that the hook 1
5 once rotates in the retreat direction. When reaching the position of the money receiving rod 19, the hook 15 which is reversely rotated by the bias of the spring 17 automatically engages with the money receiving rod 19. As a result, the door 1 is locked again with respect to the fixed frame body 20. At this time,
Although the force is transmitted in the opposite direction to the unlocking, the rack 11 slides,
Since the cam 7 does not move due to the play interval, the lever 3 does not project and rotate from the case 2.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a hook base 16 rotatably supporting a hook 15 is constructed by fitting a pair of bending and raising plate portions 21 and 21 of a mounting plate 10 with base end projecting portions 22 and 22. It is attached to the mounting plate 10. The rack 11 is slidably fitted between a pair of cut-and-raised plate portions 23, 23 of the mounting plate 10, and a screw 12 screwed into the mounting plate 10 is fitted in a guide slot 24 at the base end of the rack 11. The rack 11 is inserted, and the head of the screw 12 attaches the rack 11 to the mounting plate 1.
It has been prevented from rising from 0.

The base end cylinder portion 25 of the cam 7 is fitted to the end portion of the lever shaft 4, and the cam 7 is fixed to the lever shaft 4 with a screw 8. The case cover 9 that also serves as a washer is fitted from the back side to the case 2 that is fitted into the opening 26 of the mounting plate 10 from the front side, and the front flange 27 of the case 2 is fastened to the mounting plate 10 with the screw 18. There is. The leg 29 of the lever 3 is fixed to the lever shaft 4 by a pin 5.

Unlike the present embodiment, when the portion of the mounting plate 10 on which the hook base 16 is mounted is formed separately from the main body portion of the mounting plate 10 on which the case 2 is mounted,
By appropriately increasing or decreasing the length of the square rod 14, the lever 3
The distance from to the hook 15 can be arbitrarily changed according to the size of the door 1.

[0012]

As described above, in the door locking device of the present invention, the base end of the lever 3 housed in the case 2 so as to be retractable is pivotally attached to the case 2 by the lever shaft 4, and the lever shaft 4 is cammed. 7 is fixed, and a rack 11 is provided that is pressed and driven by a cam 7 when the lever shaft 4 rotates. A pinion 13 that meshes with the rack 11 is connected to a square rod 14, and a spring 17 is attached to the square rod 14 to a locking position. Rotationally biased hook 15
Since the hook 15 is engaged with and disengaged from the receiving rod 19 provided on the fixed frame body 20 side, it is not necessary to secure a large space for the lever 3 on the front side of the door 1.

When the protrusion 3a provided on the front side of the base end of the lever 3 is pushed, the lever 3 projects from the case 2 by a required angle, so that the space for the finger-inserting recess is provided in the case as in the conventional device. It is not necessary to secure it, and the entire device can be downsized.

Further, in the door locking device of the present invention, the cam 7 is provided.
Since a play gap is provided between the rack 11 and the rack 11, when the lever 3 is projected, the spring 17 for biasing the hook 15 is used.
The lever 3 can be pulled out lightly without receiving the force from, and the operation is performed lightly. Also, when closing the door,
Since the hook 15 and the receiving rod 19 are automatically engaged at the end of the closing operation, the convenience of the operation is excellent.

[Brief description of drawings]

FIG. 1 is a front view of a door used with a door locking device according to an embodiment of the present invention.

FIG. 2 is a rear view of the door lock device.

FIG. 3 is a plan view of the door lock device.

4 is a cross-sectional view taken along the line A-A ′ of FIG.

5 is a sectional view taken along line B-B ′ of FIG.

6 is a cross-sectional view taken along the line C-C ′ of FIG.

[Explanation of symbols]

 1 Door 2 Case 3 Lever 4 Lever Shaft 5 Lever Fixing Pin 6 Lever Immersion Energizing Spring 7 Cam 8 Cam Fixing Screw 9 Case Cover 10 Mounting Plate 11 Rack 12 Rack Guide Screw 13 Pinion 14 Square Bar 15 Hook 16 Hook Base 17 Hook Energizing Spring 18 Case Fixing Screw 19 Receiving Rod 20 Fixing Frame

Claims (3)

[Claims] 1. A base end of a lever 3 housed in a case 2 so as to be retractable is pivotally attached to a case 2 by a lever shaft 4, a cam 7 is fixed to the lever shaft 4, and the cam 7 is rotated when the lever shaft 4 rotates. A rack 11 driven by pressing is provided, a square bar 14 is connected to a pinion 13 that meshes with the rack 11, and a hook 15 is urged to rotate to a locking position by a spring 17.
Is a lock device for a door, in which the hook 15 is engaged with and disengaged from the receiving bar 19 on the fixed frame body 20 side by connecting the hook to the square bar 14. 2. The lock device according to claim 1, wherein a clearance is provided between the rack 11 and the cam 7. 3. The lever 3 is urged to rotate in the retracting direction by a spring 6, and the front protrusion 3a of the lever 3 is pushed to rotate the lever 3 to an operable angle.
Door locking device described in.