JP2616332B2 - Drawer locking device - Google Patents

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 which is applied to a single-sleeve or double-sleeve desk, a side desk, a wagon or the like, which is provided with a plurality of drawers.

[0002]

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

[0003]

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

In order to solve such a problem, a locking lever having a locking claw protruding from a side wall of a main body is provided, and when locking, the lock is turned from the outside to operate the locking lever. Is configured to be able to lock by pressing a locking lever. However, in such a configuration, since the locking lever is disposed inside the narrow side wall of the 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. In some cases, it fell to the bottom of the side wall, and it was necessary to spend unnecessary time.

[0005] An object of the present invention is to solve such a problem.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, in the drawer locking device according to the present invention, at least the front edge of the side wall of the main body into which the drawer is incorporated is composed of an outer plate and an inner plate, and in a space between the outer plate and the inner plate,
A plate-like locking lever having a shaft portion at the center of both upper and lower ends, and having a bent portion projecting toward the upper end surface of the inner plate at the upper end,
The locking lever is housed so as to be rotatable in the thickness direction about the shaft portion, and a number of lock claws corresponding to the number of drawers are protrudingly provided at one rotation edge of the locking lever, and the side wall is provided. The locking claws are provided with a claw projecting port through which the locking claws can pass, and the locking levers are urged by an elastic urging mechanism in a direction in which the locking claws enter the side walls. When the rotating edge of the lock is pressed by the operating rod of the lock, the lock claws are configured to protrude simultaneously from the claw protrusions, so that each drawer can be locked by the protruding lock claws. I do.

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

In order to support the shaft formed integrally with the locking lever in a center-linked state without backlash, a substantially heart-shaped shaft hole having a projection on the inner periphery for supporting the concave groove side of the shaft is provided. It is preferable to use

[0009]

With such a construction, at the time of assembly, 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 further, the shaft at the lower center is pivoted. If the lock lever cannot be inserted into the hole, the lock lever tends to drop below the original disposition 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 comes into contact with the upper end surface of the inner plate to prevent the locking lever from falling. Therefore, when setting the locking lever 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 assembled again without wasting time.

In use, when the other rotating edge of the locking lever is pressed against the urging force of the elastic urging mechanism by the operating rod of the lock responding to the locking operation, the locking lever is pivoted. Rotating in the thickness direction with the portion as the center, the lock claws projecting from one of the turning edges project simultaneously from the claw projecting openings. As a result, each drawer is locked in the closed position by the lock claw.

However, in this lock, there is no need to connect the operating rod of the lock and the locking lever, and it is only necessary to press the rotating edge of the locking lever with the operating rod at the time of locking. Even if it is provided on a top plate or a specific drawer that is detachable from the main body,
It takes no effort to attach and detach 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 One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded view of a main part 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-sleeved desk D has a top panel D1 and a side panel D2.
And the sleeve body 1 to support it. As shown in FIG. 3, a shallow drawer 2 is incorporated in the upper part of the sleeve body 1, and deep drawers 3 and 4 are incorporated in the middle and lower parts of the sleeve body 1. A drawer locking device 8 for locking these drawers 2, 3, and 4 is provided. Is provided.

The drawer 2 is formed by fixing a back plate 22 to a front end of a body plate 21 forming a storage space Sa, and attaching end plates 23 to the back plate 22. Both outer surfaces of the body plate 21 are provided. Is provided with a hollow ridge 24 extending forward and backward. The ridge 24 is slidably supported by the rail portion 1a of the sleeve body 1. The drawer 3 is formed by attaching a back plate 32 to a front end of a body plate 31 forming a storage space Sb, and attaching a mirror plate 33 to the back plate 32.
On both outer side surfaces, there are provided hollow ridges 34 extending in the front-back direction. The ridge 34 is slidably supported by 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 of a body plate 41 forming a storage space Sc, and attaching end plates 43 to the back plate. Is provided with a hollow ridge 44 extending forward and backward. The ridge 34 is slidably supported by 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 an upper horizontal member 13. The side wall 11 is formed by fixing an inner plate 11b forming the inner surface of the side wall 11 to the inside of the front edge of an outer plate 11a forming the outer surface and the front surface of the side wall 11 by welding. A flat space R opening upward is formed between the flat space R and the plate 11a.

The drawer locking device 8 is, as shown in FIG.
A vertically long plate-shaped locking lever 81 is accommodated in a space R formed at the front edge of the side wall 11 of the sleeve body 1. The locking lever 81 is made by pressing a sheet metal material, and has shaft portions 81j, 8 at the upper and lower ends.
1k. Thus, these shaft portions 81j, 81
“k” is formed by press-forming an elongated portion of a sheet metal material into an arcuate cross section and is formed integrally with the locking lever 81. That is, the concave portions 81ja and 81ka are formed in the central portions of the upper and lower shaft portions 81j and 81k. Then, these 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.

When pressing the locking lever 81 similarly to the shaft portions 81j and 81k, the locking lever 81 is cut out to a predetermined width and a predetermined length from the upper end of the locking lever 81. 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 of the inner plate 11b. That is, the bent portion 89 is connected to the locking lever 8.
A vertical portion 89a extending in the longitudinal direction and a horizontal portion 89b which is bent at right angles to the vertical portion 89a to a length substantially equal to the distance between the outer plate 11a and the inner plate 11b of the side wall 11. . When the locking lever 81 falls below the normal installation position, that is, when the lower shaft portion 81k is not inserted into the shaft hole 83 in the assembly process, the horizontal portion b of the bent portion 89 is The lock lever 81 contacts the notch hole 11d formed in the upper edge of the inner plate 11b, and prevents the locking lever 81 from dropping below the space R that is inaccessible to the operator.

Next, the lower shaft portion 81k of the locking lever 81
The bearing member 83 supporting the inner wall 11b of the side wall 11
To the space R side from the tongue, and a projection 83ka on the inner periphery supporting the concave groove 81ka side of the shaft portion 81k.
And a substantially heart-shaped shaft hole 83k having In addition,
The lower end of the shaft portion 81k is slightly curved toward the inner plate 11b. This is because when the locking lever 81 is inserted into the space R from above while being attached to the inner surface of the outer plate 11a, the shaft portion 81k can be smoothly inserted into the shaft hole 83k. Bearing member 8 supporting upper shaft portion 81j
Numeral 2 is made of a synthetic resin, which 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 main body 1. The base groove 82b is formed by the inner plate 11b of the side wall 11. Is press-fitted into a notch hole 11c formed in the upper edge and is fixed. A shaft hole 82j is provided on the tip 82s side of the bearing member 82 which also serves as the joint material. In addition, one locking edge 81s of the locking lever 81 is provided with a number of lock claws 84a, 84b, 84c projecting corresponding to the number of stages of the drawers 2, 3, and 4. Each of these lock claws 84a, 84b, 84c
Is a tongue-shaped member integrally cut and raised from the locking lever 81, and is projected substantially horizontally. The side wall 1
These lock claws 84a, 84 on the first inner plate 11b
b, 84c, these lock claws 84a,
Claw projections 85a, 85b, through which 84b, 84c can pass;
85c is provided.

The locking lever 81 is rotationally urged by the elastic urging mechanism 86 in a direction in which the lock claws 84a, 84b, 84c enter the side wall 11, and the other rotating edge of the locking lever 81 is rotated. 81b is the operating rod 8 of the lock 87
When the lock pawls 84a, 84b, 84c are pressed and rotated by 7a, the pawl projections 85a, 85b, 8
5c so as to project all at once. More specifically, the elastic urging mechanism 86 winds a torsion coil spring 86a around the base end of the shaft portion 81j,
b is supported on the outer plate 11 a of the side wall 11, and the other end 86 c is elastically contacted with the other rotating edge 81 b of the locking lever 81. In this unlocked state, as shown by the solid line in FIG. 4 and FIG.
The rotation of the lock pawls 84 a, 84 b, and 84 c is in a state of being immersed in the side wall 11.

The lock 87 is pulled out of the keyhole 87b by the handle 3 of the drawer 3.
The operating rod 87a is moved to the left in FIG. 6 by mounting a predetermined key 87c into the key hole 87b and performing a locking operation. The moving operating rod 8
At the tip of 7a, the upper edge portion 81bj of the rotating edge 81b of the locking lever 81 can be pressed leftward in FIG. The operating rod 87a is in close contact with the side end surface of the back plate 32 of the middle drawer 3, and the guide member 5
Accordingly, the tip is disposed so as to surely penetrate the transparent window 88. The transparent window 88 is formed inside the front edge of the side wall 11, and when a locking operation is performed, an operating rod 87 a of the lock 87 enters the transparent window 88 and the locking lever located inside the transparent window 88. The other rotating edge 81b of the pressing member 81 can be pressed. By rotating the locking lever 81 around the shaft portions 81j and 81k against the urging force of the elastic urging mechanism 86 in this way, the lock claws 84a and 84
b, 84c can be made to protrude from the claw protrusions 85a, 85b, 85c, and these lock claws 84a, 84b, 8
Each drawer 2, 3 and 4 can be locked by 4c.

That is, in this embodiment, as shown in FIG. 3, the projections 24 of the upper drawer 2 are provided with the engagement holes 25 facing the claw projections 85a, and the middle drawer 3 and the lower drawer 4 are provided. The engagement 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 engaging hole 25 of the upper drawer 2 to inhibit the drawer 2 from sliding, and the lock claws 84b and 84c protrude immediately before the engaging projections 35 and 45 of the middle and lower drawers 3 and 4, respectively. Thus, the drawer 3 and the drawer 4 can be prevented from moving forward. Engagement hole 25 of drawer 2
7 and 8, a raised portion 25a
Are formed. The raised portion 25a is slightly bulged outward from the side surface of the ridge 24, and when the lock claw 84a engages with the engagement hole 25, the lock claw 84a
Is formed in order to prevent the escape.

Note that 84d, 84e, 84f, 84g
Are tongues that can be folded into lock pawls when equipped with different types of drawers.

In the above configuration, when assembling the drawer locking device 8, first, the locking lever 81 is moved to the space R of the side wall 11.
Insert At this time, when the locking lever 81 is lowered in a state in which the locking lever 81 is shifted toward the outer plate 11a in the space R, the lower shaft 81
k does not reach the shaft hole 83k and the bearing member 83 and the outer plate 11a
Will fall into the gap. The locking lever 81 that is depressed has a horizontal portion 89b of the bent portion 89 with a notch 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 to the lower portion of the side wall 11, but grasps the bent portion 89 and easily lifts the locking lever 81. After that, the assembling work of the locking lever 81 can be quickly restarted again.

After the lower shaft portion 81k is inserted into the shaft hole 83k and the upper shaft portion 81j is inserted into the shaft hole 82j to complete the assembly, the unlocking force of the elastic urging mechanism 86 is applied for unlocking. As a result, the locking lever 81 is held at the position shown by the solid line in FIG. 4, FIG. 5, and FIG.
a, 84b and 84c are immersed in the side wall 11, and the contact between the lock 87 and the locking lever 81 is cut off.
In this state, the drawers 2, 3, and 4 can be freely pulled out and used. When the locking operation is performed from this state to move the operating rod 87a of the lock 87 to the left in FIG. 6, the locking lever 8 is moved by the tip of the operating rod 87a.
The other rotating edge 81b is pressed to the left, and the locking lever 81 is rotated in the thickness direction around the shaft portions 81j and 81k. The claws 84a, 84b, 84c are in the form of claw projections 85a, 85.
b and 85c (see phantom lines in FIGS. 5 and 6). As a result, the lock claws 84a are engaged with the corresponding engagement holes 25 of the drawer 2, and the drawer 2 is locked, and the lock claws 84b, 84c are positioned immediately before the protrusions 35, 45 of the drawers 3, 4. Located in the drawer 3,
4 will be prohibited. Thus, in such a case, the operating rod 87a of the lock 87 and the locking lever 81
The lock 87 is provided on a drawer that can be attached to and detached from the sleeve main body 1 because there is no need to mechanically connect the lock lever 81 with the operating lever 87a of the lock lever 81 at the time of locking. However, there is no need to take time to attach and detach the drawer. In addition, since the locking lever 81 is a plate-shaped member and only rotates in the thickness direction by an angle required for the lock claws 84a, 84b, and 84c to protrude and retract, the locking lever 81 can be easily accommodated in the side wall 11. can do.
Therefore, it is easy to reduce the bulk as compared with the link mechanism or the crank mechanism, and the arrangement space can be saved. The present invention is not limited to the embodiment 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 a wagon, on the top plate.

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

[0027]

According to the present invention, as described in detail above, the bent portion at the upper end of the locking lever protrudes toward the upper end surface of the inner plate of the side wall. When the locking lever is inserted into the space between the outer plate and the inner plate of the part, even if the locking lever falls below the original disposition position, the bent part contacts the upper end surface of the inner plate and the locking lever In order to prevent the falling of the lock lever and re-install the lock lever, there is no need to use a special jig or tool to take out the lock lever from the inside of the side wall, and assemble the lock lever again without wasting time. be able to.

Further, since the locking lever is pressed by the operating rod of the lock, there is no need to mechanically connect the lock to the locking lever. Therefore, restrictions on the arrangement position of the lock are reduced, and the lock can be easily mounted on a specific drawer or a top plate detachably mounted on the main body.

Further, since this locking lever is plate-shaped and only needs to rotate in the thickness direction within a narrow range,
It can also be easily placed in the thin side walls of the body. In addition, since the locking claw is provided directly on the rotating edge of the locking lever, no other complicated transmission mechanism is required. Therefore, the structure can be simplified, and the arrangement space can be saved as much as possible. In particular, if the shaft is made by pressing an anti-gold material into a cross-section circular arc shape and the lock claw is cut and raised integrally from the locking lever, the number of parts will be reduced as much as possible. Therefore, it is possible to relatively easily cope with an automatic assembling operation or the like by a robot. Further, when the shaft portion is also formed as a single-piece component made of sheet metal, it is preferable to use a substantially heart-shaped shaft hole having a projection on the inner periphery that supports the concave groove side of the shaft portion. For example, the shaft can be supported without backlash in a centered state.

[Brief description of the 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 entire configuration of the embodiment.

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

FIG. 4 is a plan view showing the front end portion of the side wall of the sleeve main 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 the 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 a middle drawer of the embodiment.

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

FIG. 8 is a sectional view taken along line AA in FIG. 7;

[Explanation of symbols]

 DESCRIPTION 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 part 81s ... One rotating edge 81b ... The other rotating Edges 82j, 83k: Shaft holes 84a, 84b, 84c: Lock claws 85a, 85b, 85c: Claw projections 86: Elastic biasing mechanism 87: Lock 87a: Actuating rod 89: Bend portion 89a: Vertical portion 89b: Horizontal portion

Claims (4)

(57) [Claims] At least a front edge of a side wall of a main body into which a drawer is incorporated is composed 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 protruding in the direction of the upper end surface of the inner plate at its upper end is housed so as to be rotatable in the thickness direction around its shaft portion. On one of the rotating edges of the locking lever, a number of locking claws corresponding to the number of steps of the drawer are provided so as to protrude, and on the inner surface of the side wall, a claw projecting opening through which the locking claws can pass is provided. Each locking claw is biased by a biasing mechanism in the direction of immersion into the side wall, and when the other rotating edge of the locking lever is pressed by the operating rod of the lock, the locking claw is moved out of the claw protrusion. It is configured to protrude at once, and each drawer is protruded by the protruding lock claw. Drawer locking device, characterized in that the adapted to lock. 2. The drawer locking device according to claim 1, wherein the bent portion is cut and raised from a locking lever on one of the upper edges of the rotating edge. 3. The drawer lock 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 a lock lever. apparatus. 4. The lock lever according to claim 2, wherein the shaft portion of the locking lever is supported by a substantially heart-shaped shaft hole having a projection on the inner periphery for supporting the concave groove side of the shaft portion. Drawer locking device.