JPH05214869A - Locking device for drawer - Google Patents

Abstract

PURPOSE:To prevent a locking lever from falling down into a side wall. CONSTITUTION:At least a front edge of a side wall 11 of a body, into which drawers are incorporated, is comprised of an outer board 11a and an inner board 11b, and axial portions 81j, 81k are provided respectively at the center of the upper and lower ends in a space between both the boards and further a board-shaped locking bar 81 having a bent portion 89 projecting in the upper surface direction of the inner board is put into the upper end so as to be rotatable in the width direction about the axial portion. On one rotation edge 81s of the lever 81, there are provided lock claws 84a, 84b, 84c corresponding to the number of drawers and claw project ports 85a, 85b, 85c for passage of these claws therethrough are provided through the inner surface of the side wall. The locking lever is energized by an elastic energizing mechanism 86 in such a direction as to put each claw into the side wall and, when the other edge 81b of the locking lever is pressed by an operation rod of a lock, the lock claws are projected simultaneously from the claw project ports.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer locking device applied to a single-sleeve or double-sleeve desk having a plurality of stages of drawers, a side desk or a wagon.

[0002]

2. Description of the Related Art In a conventional drawer locking device of this kind, a link mechanism and a crank mechanism are connected to an operating portion of a lock provided on a top plate or the like, and movement of the operating portion due to a locking operation is performed through these mechanisms. It is transmitted to the lock claw for locking the drawer.

[0003]

However, when the link mechanism and the crank mechanism are connected to the lock, the top plate to which the lock is attached can be removed from the main body that houses the drawer incorporating the link mechanism and the like. The problem is that it is difficult to design. And, in this way, it is necessary to connect the lock and the lock claw via a link mechanism or the like,
It is impossible to lock all the drawers with a lock provided on the moving drawer, and there is a problem that the degree of freedom in design is low.

In order to solve such a problem, a locking lever having a locking claw protruding is provided in the side wall of the main body, and when locking, the lock is pivoted from the outside to operate the lock. It is known that the lock can be locked by pressing the lock lever. However, in such a structure, since the locking lever is arranged inside the side wall having a narrow space, it is difficult to insert the lower end of the locking lever into the bearing provided inside the side wall at the time of assembly. Sometimes it fell to the bottom of the side wall, where it was necessary to spend unnecessary time.

An object of the present invention is to eliminate such a problem.

[0006]

The present invention takes the following means in order to achieve such an object. That is, in the drawer locking device according to the present invention, at least the front edge portion of the side wall of the main body in which the drawer is incorporated is composed of the outer plate and the inner plate, and in the space between the outer plate and the inner plate,
A plate-shaped locking lever having a shaft portion at the center of both upper and lower ends and a bent portion protruding at the upper end toward the upper end surface of the inner plate,
The lock lever is housed so as to be rotatable in the thickness direction, and one locking edge of the locking lever is provided with a number of locking claws corresponding to the number of steps of the drawer, and the side wall is provided. The inner surface of the lock claw is provided with a pawl projection port through which the lock claw can pass, and the locking lever is urged by an elastic urging mechanism in a direction in which each lock claw is retracted into the side wall. The lock claws are configured to simultaneously project from the claw projecting opening when the pivoting edge of the lock is pressed by the operating rod of the lock, and the respective drawers can be locked by the projecting lock claws. To do.

In order to reduce the number of parts as much as possible, the bent portion is cut and raised from the locking lever, and the shaft portion is formed by press-forming a sheet metal material into an arcuate cross section. Further, it is preferable that the locking claw is cut and raised from the locking lever.

In order to support the shaft portion integrally formed with the locking lever in a center-linked state without rattling, a substantially heart-shaped shaft hole having a projection for supporting the recessed groove side of the shaft portion on the inner circumference is provided. Is preferably used.

[0009]

With this construction, when assembling, the locking lever is inserted into the space between the outer plate and the inner plate at the front edge of the side wall of the main body, and the shaft portion at the lower end is pivoted. If the locking lever cannot be inserted into the hole, the locking lever will try to fall below the original installation position. However, since the bent portion at the upper end of the locking lever projects toward the upper end surface of the inner plate of the side wall, the bent portion abuts the upper end surface of the inner plate to prevent the locking lever from falling. Therefore, when the locking lever is set again, the locking lever can be taken out from the inside of the side wall without using a special jig or tool, and the locking lever can be reassembled without wasting time.

During use, when the other operating edge of the locking lever is pressed against the biasing force of the elastic biasing mechanism by the operating rod of the lock that responds to the locking operation, the locking lever is pivoted. With the portion as a core, it rotates in the thickness direction, and the lock claws protruding from one of the rotation edges simultaneously project from the claw projecting opening. As a result, each drawer is locked in the closed position by the locking claw.

However, in this case, it is not necessary to connect the operating lever of the lock and the locking lever, and only the pivoting edge of the locking lever needs to be pressed by the operating rod when locking the lock. Even if it is provided on the top plate that can be attached to and detached from the main body or a specific drawer,
There is no need to take time to put on and take off the top plate, and there is no restriction on the operation of the drawer with the lock attached.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded view of the essential parts of a drawer locking device 8 provided in the sleeve body 1 of the sleeve portion of the one-sleeved desk D shown in FIG.

The single-sleeve desk D has a top panel D1 and a side panel D2.
It is formed so as to be supported by and the sleeve body 1. As shown in FIG. 3, the sleeve main body 1 has a shallow drawer 2 in the upper stage and deep drawers 3 and 4 in the middle and lower stages, respectively, and a drawer locking device 8 for locking these drawers 2, 3 and 4. It is provided.

The drawer 2 is constructed by fixing a back plate 22 to the front end of a body plate 21 which forms the storage space Sa, and attaching a mirror plate 23 to the back plate 22. A hollow-body-shaped protrusion 24 extending in the front-rear direction is provided on the. The ridge 24 is slidably supported on the rail portion 1a of the sleeve body 1. The drawer 3 is formed by fixing a back plate 32 to the front end of a body plate 31 that forms the storage space Sb, and mounting an end plate 33 on the back plate 32.
Hollow body-shaped protrusions 34 extending in the front-rear direction are provided on both outer side surfaces of the. The ridge 34 is slidably supported on the suspension rail 1b of the sleeve body 1. The drawer 4 is formed by fixing a back plate (not shown) to the front end portion of the body plate 41 forming the storage space Sc, and mounting the end plates 43 on the back plate. A hollow body-shaped ridge 44 extending in the front-rear direction is provided on the. The ridge 34 is slidably supported on the suspension rail 1c of the sleeve body 1.

The sleeve body 1 has left and right side walls 11 and a bottom plate 12
And a back wall (not shown) and the upper horizontal member 13 are connected to each other. The side wall 11 is formed by welding an inner plate 11b forming the inner surface of the side wall 11 to the inside of a front edge portion of an outer plate 11a forming the outer surface and the front surface of the side wall 11, and the inner plate 11b and the outer surface. A flat space R that opens upward is formed between the plate 11a and the plate 11a.

The drawer locking device 8 is, as shown in FIG.
In the space R formed at the front edge of the side wall 11 of the sleeve body 1, a vertically long plate-like locking lever 81 is housed. The locking lever 81 is made by pressing a sheet metal material, and has shaft portions 81j, 8 at the center of both upper and lower ends.
It has 1k. Then, these shaft parts 81j, 81
“K” is formed by press-molding an elongated portion of a sheet metal material into an arc shape in cross section, and is formed integrally with the locking lever 81. That is, recessed portions 81ja and 81ka are formed in the central portions of the upper and lower shaft portions 81j and 81k. Then, the shaft portions 81j and 81k are connected to the bearing member 82.
And the bearing member 83 so that the locking lever 81 can rotate in the thickness direction.

Similarly to the shaft portions 81j and 81k, when the locking lever 81 is pressed, a predetermined width and a predetermined length are cut out from one end of the upper end of the locking lever 81, and then the side wall 11 is formed. A bent portion 89 is formed by bending a predetermined length toward the upper end surface of the inner plate 11b provided on the inner surface side. That is, the bent portion 89 is the locking lever 8
1, a vertical portion 89a extending in the longitudinal direction, and a horizontal portion 89b bent at a right angle to the vertical portion 89a and having a length substantially equal to the distance between the outer plate 11a and the inner plate 11b of the side wall 11. .. The horizontal portion b of the bent portion 89 is provided on the side wall 11 when the locking lever 81 falls below the normally assembled position, that is, when the lower shaft portion 81k is not inserted into the shaft hole 83 in the assembly process. The locking lever 81 is prevented from falling below the space R that cannot be reached by the operator by coming into contact with the notch hole 11d formed in the upper edge of the inner plate 11b.

Next, the shaft portion 81k below the locking lever 81
The bearing member 83 for supporting the inner plate 11 b of the side wall 11 is
A tongue piece cut and raised from the side to the space R side, and a projection 83ka for supporting the recessed groove 81ka side of the shaft 81k on the inner periphery.
Has a substantially heart-shaped shaft hole 83k. In addition,
The lower end of the shaft portion 81k is slightly curved to the inner plate 11b. This is to allow the shaft 81k to be smoothly inserted into the shaft hole 83k when the locking lever 81 is inserted into the space R from above while being fitted to the inner surface of the outer plate 11a. Bearing member 8 supporting the upper shaft portion 81j
Reference numeral 2 is made of synthetic resin and also serves as a joint material interposed between the top plate D1 and the upper end surface of the side wall 11 of the sleeve body 1, and the base end groove portion 82b is provided in the inner plate 11b of the side wall 11. It is press-fitted and fixed in the notch hole 11c formed in the upper edge of the. A shaft hole 82j is provided on the tip end 82s side of the bearing member 82 that also serves as the joint material. Further, on one rotating edge 81 s of the locking lever 81, lock claws 84 a, 84 b, 84 c are provided so as to project in a number corresponding to the number of steps of the drawers 2, 3, 4. These lock claws 84a, 84b, 84c
Is a tongue piece integrally cut and raised from the locking lever 81, and is projected substantially horizontally. Also, the side wall 1
These lock claws 84a, 84 on the inner plate 11b
These lock claws 84a, 84a,
Claw protrusions 85a, 85b through which 84b, 84c can pass
85c is provided.

Then, the locking lever 81 is urged by the elastic urging mechanism 86 in the direction in which the lock claws 84a, 84b, 84c are retracted into the side wall 11, and the other rotation edge of the locking lever 81 is also urged. 81b is an operating rod 8 of a lock 87
The lock claws 84a, 84b, 84c are pushed by the 7a and rotated to cause the claw projecting openings 85a, 85b, 8
It is configured to project from 5c all at once. More specifically, in the elastic biasing mechanism 86, a torsion coil spring 86a is wound around the base end portion of the shaft portion 81j, and one end 86 of the torsion coil spring 86a is wound.
b is supported by the outer plate 11a of the side wall 11, and the other end 86c is elastically contacted with the other rotating edge 81b of the locking lever 81. In this state where it is not locked, as shown by the solid line in FIGS.
The first inner plate 11b is abutted against the inner plate 11b and is not allowed to rotate, and the lock claws 84a, 84b, 84c are in a state of being recessed in the side wall 11.

The lock 87 has a keyhole 87b and a puller 3 of the drawer 3.
It is attached so that it is exposed on the front surface 36a of the six parts, and by inserting a predetermined key 87c into the keyhole 87b and performing a locking operation, the operating rod 87a moves to the left in FIG. And the moving operating rod 8
The upper edge portion 81bj of the rotating edge 81b of the locking lever 81 can be pushed leftward in the figure by the tip of 7a. The operating rod 87a is in close contact with the side end surface of the back plate 32 of the drawer 3 in the middle stage and is attached to the rear surface of the end plate 33.
Thus, the tip is arranged so as to surely penetrate the transparent window 88. The through window 88 is bored inside the front edge of the side wall 11, and when the locking operation is performed, the operating rod 87a of the lock 87 enters the through window 88 and the locking lever located inside thereof. The other rotating edge 81b of 81 can be pressed. In this way, by rotating the locking lever 81 around the shaft portions 81j and 81k against the urging force of the elastic urging mechanism 86, the lock pawls 84a and 84k are formed.
b, 84c can be projected from the claw projecting openings 85a, 85b, 85c, and these locking claws 84a, 84b, 8c
The drawers 2, 3 and 4 can be locked by 4c.

That is, in this embodiment, as shown in FIG. 3, the protrusion 24 of the upper drawer 2 is provided with the engaging hole 25 facing the claw projection 85a, and the middle drawer 3 and the lower drawer 4 are provided. Engaging projections 35 and 45 are provided on the body plate 31 and the body plate 41, respectively. When the locking lever 81 rotates, the lock claw 84a
Engages with the engagement hole 25 of the upper drawer 2 to prohibit the drawer 2 from sliding, and the locking claws 84b and 84c project immediately before the engaging protrusions 35 and 45 of the middle and lower drawers 3 and 4, respectively. Therefore, the drawer 3 and the drawer 4 can be prevented from moving forward. Engagement hole 25 of drawer 2
As shown in FIGS. 7 and 8, the rear portion of the raised portion 25a
Are formed. The raised portion 25a is slightly bulged outward from the side surface of the protrusion 24, and when the lock claw 84a is engaged with the engagement hole 25, the lock claw 84a is caused for some reason.
It is formed to prevent the escape of.

Incidentally, 84d, 84e, 84f, 84g
Is a tongue for folding into a locking claw when equipped with different types of drawers.

In the above structure, when the drawer locking device 8 is assembled, the locking lever 81 is first moved to the space R of the side wall 11.
To insert. At this time, when the locking lever 81 is lowered while being close to the outer plate 11a side in the space R, the lower shaft portion 81
k does not reach the shaft hole 83k, the bearing member 83 and the outer plate 11a
It will fall into the gap between and. In the locking lever 81 which is depressed, the horizontal portion 89b of the bent portion 89 has the cutout 11d.
To stop the fall. Therefore, even if the shaft portion k is not inserted into the shaft hole 83k of the bearing member 83 at the time of assembly, the locking lever 81 does not fall into the lower portion of the side wall 11 and the bent portion 89 is grasped to easily pull up the locking lever 81. After that, the work of assembling the locking lever 81 can be promptly restarted again.

After the lower shaft 81k is inserted into the shaft hole 83k and the upper shaft 81j is inserted into the shaft hole 82j to complete the assembling, the urging force of the elastic urging mechanism 86 is applied to unlock. As a result, the locking lever 81 is held at the position shown by the solid line in FIGS. 4, 5, and 6, and the locking claw 84
The a, 84b, and 84c are recessed in the side wall 11, and the lock 87 and the locking lever 81 are out of contact with each other.
In this state, the drawers 2, 3 and 4 can be freely pulled out and used. When the operating lever 87a of the lock 87 is moved to the left in FIG. 6 by performing the locking operation from this state, the locking lever 8a is moved by the tip of the operating rod 87a.
The other turning edge 81b of No. 1 is pressed to the left, and the locking lever 81 turns in the thickness direction with the shaft portions 81j and 81k as the cores, and the lock protruding from the one turning edge 81s. The claws 84a, 84b, 84c are the claw projecting openings 85a, 85.
It simultaneously projects from b and 85c (shown by phantom lines in FIGS. 5 and 6). As a result, the lock claw 84a engages with the corresponding engaging hole 25 of the drawer 2 to lock the drawer 2, and the lock claws 84b and 84c are located immediately before the protrusions 35 and 45 of the drawers 3 and 4, respectively. Position the drawer 3,
The movement of 4 will be prohibited. With such a structure, the operating rod 87a of the lock 87 and the locking lever 81
Since it is not necessary to mechanically connect and with each other, it is only necessary to press the pivoting edge 81b of the locking lever 81 with the operating rod 87a at the time of locking, so that the lock 87 is provided in the drawer that is detachable from the sleeve body 1. However, it does not take time to attach and detach the drawer. Moreover, since the locking lever 81 is a plate-shaped member and is only rotated in the thickness direction by the angle necessary for the lock claws 84a, 84b, 84c to be projected and retracted, it can be housed inside the side wall 11 without difficulty. can do.
Therefore, it is easier to reduce the bulk as compared with the link mechanism and the crank mechanism, and the arrangement space can be saved. The present invention is not limited to the embodiments described above, and may be applied to a wagon having a plurality of drawers. Further, the lock 87 may be provided on the upper drawer 2 or, in the wagon, may be provided on the top plate.

In addition, the configuration of each part is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

[0027]

As described in detail above, according to the present invention, since the bent portion of the upper end of the locking lever projects toward the upper end surface of the inner plate of the side wall, the front edge of the side wall of the main body is assembled at the time of assembly. When the locking lever is inserted into the space between the outer plate and the inner plate of the section, even if the locking lever falls below its original position, the bent part contacts the upper end surface of the inner plate and the locking lever When locking the lock lever again, it is not necessary to use a special jig or tool to remove the lock lever from the inside of the side wall, and the lock lever can be reassembled without wasting time. be able to.

Further, since the lock lever is pressed by the operating rod of the lock, it is not necessary to mechanically connect the lock and the lock lever. Therefore, there are less restrictions on the arrangement position of the lock, and it becomes easy to attach the lock to a specific drawer or a top plate detachably attached to the main body.

Moreover, since this locking lever has a plate-like shape and only needs to be rotated in the thickness direction within a narrow range,
It can also be easily placed in the thin side wall of the body. Moreover, since the locking claw is directly provided on the rotating edge of the locking lever, no complicated transmission mechanism is required. Therefore, the structure can be simplified and the arrangement space can be saved as much as possible. In particular, the number of parts can be reduced as much as possible by making the shaft part by press-molding an anti-gold material in a partially arcuate cross-section and by making the lock claw integrally cut and raised from the locking lever. Therefore, it is possible to cope with automatic assembly work by a robot relatively easily. Further, when the shaft portion is also an integrally molded part made of sheet metal, it is preferable to use a substantially heart-shaped shaft hole having a projection for supporting the recessed groove side of the shaft portion on the inner circumference. For example, it is possible to support the shaft without rattling with the shaft centered.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a front view showing the overall configuration of the same embodiment.

FIG. 3 is a perspective view showing the drawer of the embodiment.

FIG. 4 is a plan view showing a front end portion of a side wall of the sleeve body with the top plate of the embodiment removed.

FIG. 5 is a plan sectional view showing a front end portion of a side wall of a lock claw for pulling out the upper stage of the embodiment.

FIG. 6 is a plan sectional view showing a front end portion of a side wall of a lock claw for pulling out a middle stage of the embodiment.

FIG. 7 is an enlarged perspective view showing an engagement hole portion of an upper drawer of the embodiment.

8 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

 1 ... Sleeve main body 2, 3, 4 ... Drawer 8 ... Drawer locking device 11 ... Side wall 11a ... Outer plate 11b ... Inner plate 81 ... Locking lever 81j, 81k ... Shaft 81s ... One rotating edge 81b ... Other rotating Edges 82j, 83k ... Shaft holes 84a, 84b, 84c ... Lock claws 85a, 85b, 85c ... Claw protrusion 86 ... Elastic biasing mechanism 87 ... Lock 87a ... Actuating rod 89 ... Bend 89a ... Vertical part 89b ... Horizontal part

Claims (4)

[Claims] 1. A side wall of a main body in which a drawer is incorporated comprises at least a front edge portion of an outer plate and an inner plate, and a shaft portion is provided at a center between upper and lower ends in a space between the outer plate and the inner plate. A plate-shaped locking lever having a bent portion projecting toward the upper end surface direction of the inner plate at the upper end is housed so as to be rotatable in the thickness direction about its shaft portion. One locking edge of the locking lever is provided with a number of lock claws corresponding to the number of steps of the drawer, and a claw projecting opening through which the lock claws can pass is provided on the inner surface of the side wall. A biasing mechanism urges each lock claw to rotate in the direction in which the lock claw retracts into the side wall, and when the other rotation edge of the locking lever is pressed by the operating rod of the lock, the lock claw is released from the claw projection opening. It is configured to project all at once, and each drawer is individually Drawer locking device, characterized in that the adapted to lock. 2. The drawer locking device according to claim 1, wherein the bent portion is formed by cutting and raising from a locking lever on one of the rotating edges of the upper end. 3. The drawer locking mechanism according to claim 1, wherein the shaft portion is formed by press-forming a sheet metal material into a partially arcuate cross section, and the lock claw is cut and raised from the locking lever. apparatus. 4. The shaft portion of the locking lever is supported by a substantially heart-shaped shaft hole having an inner periphery having a projection for supporting the recessed groove side of the shaft portion. Drawer locking device.