JP2671696B2 - 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 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, the operating rod becomes long depending on the lock mounting location,
In some cases, the locking lever in the side wall cannot be pressed well.

[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 is housed so as to be rotatable in the thickness direction about the shaft portion, and a pulling-out is performed on one of the rotating edges of the locking lever. Along with protruding the number of lock claws corresponding to the number of steps, a claw protrusion port through which these lock claws can pass is provided on the inner surface of the side wall,
This locking lever is urged by a resilient urging mechanism so that each locking claw is retracted in the side wall, and a guide member for guiding the lock operating rod in the direction of the locking lever is provided on the rear surface of the front member of the drawer. When the lock lever is attached and the other rotating edge of the locking lever is pressed by the operating rod, the lock claws are configured to simultaneously project from the claw projection openings, and the respective drawers are locked by the projecting lock claws. The shaft portion is made of a sheet metal material with a partial arcuate cross section.
The guide member is provided with a sliding contact surface for preventing lateral vibration of the drawer closed by sliding contact with the side wall of the main body. In order to reduce the number of parts as much as possible, it is preferable to cut and raise the lock claw 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 protrusion for supporting the recessed groove side of the shaft portion on the inner periphery is supported. Is preferably used.

[0008]

With such a construction, the operating rod of the lock that responds to the locking operation is the portion where the lock is close to the center of the front member of the drawer by the guide member attached to the back surface of the front member of the drawer. Even if there is a distance to the side wall where the lock lever is mounted, the guide is surely brought into contact with the lock lever. When the operating rod presses the other rotating edge of the locking lever against the urging force of the elastic urging mechanism, the locking lever rotates in the thickness direction with the shaft portion as the core, and one of the rotating edges moves. The protruding lock claws simultaneously project from the claw projection ports. As a result, each drawer is locked in the closed position by the lock claw. Further, when the drawer is closed and reaches the most retracted position in the guide member, the sliding contact surface is in sliding contact with the side wall of the main body, so that lateral vibration of the drawer can be prevented.

[0009] Thus, this compound is not necessary to connect the actuating rod of the lock and locking lever, since it is only necessary to push the times Birds Nest locking lever in its operating rod during locking, the lock, with respect to the main body Even if it is installed on a removable top plate or a specific drawer,
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. Furthermore, the shaft
Is formed by pressing a sheet metal material into an arc shape in cross section
Therefore, its production becomes very easy.

[0010]

EXAMPLES Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1-9.

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.
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 constructed by fixing a back plate 22 to the front end portion of a body plate 21 which forms a storage space Sa, and mounting an end plate 23 as a front member on the back plate 22. Hollow body-shaped protrusions 24 extending forward and backward are provided on both outer side surfaces of the
Is provided. The ridge 24 is slidably supported by the rail portion 1a of the sleeve body 1. Drawer 3
Is the back plate 3 at the front end of the body plate 31 forming the storage space Sb.
2 is fixed, and the end plate 33 is attached to the back plate 32. Hollow body-shaped protrusions 34 extending forward and backward are provided on both outer surfaces of the body plate 31. 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.

Similarly to the shaft portions 81j and 81k, when the locking lever 81 is pressed, a predetermined width is cut out to a predetermined length on the side of the upper end of the locking lever 81 at the turning edge 81s, and then the side wall 11 is formed. A bent portion 89 is formed by bending the inner plate 11b provided on the inner surface side of the inner plate 11b toward the upper end surface by a predetermined length. 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 shaft portion 81k below 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.

Then, the lock 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 rotative edge of the lock lever 81. 81b lock lever 8 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 has a keyhole 87b and a puller 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 guide member 5 is made of a synthetic resin, and has a base 5a as shown in FIG. 7A showing a left side surface, FIG. 7B showing a front surface, and FIG. 7C showing a right side surface. A front wall 5b and a rear wall 5c are erected up and down on the front and back of the upper surface, and the respective walls 5b and 5c are connected by a horizontal bridge portion 5d. A rib 5e is formed on the left side surface of each of the walls 5b and 5c,
The left end surface of each rib 5e is a sliding contact surface 5h that is in sliding contact with the side wall 11. Below the horizontal bridge portion 5d, a guide base portion 5g having a concave surface strip 5f formed in the center is provided. Further, the end plate 3 of the drawer 3 is provided at the lower left edge of the base 5a.
3 is provided with a locking portion 5h to be inserted into a mounting hole (not shown) formed in the rear surface. Furthermore, the guide board section 5
An elastically deformable hook portion 5j formed in a fishhook shape is provided on the right end surface of g. After inserting the locking portion 5h into the locking hole of the end plate 33, the guide member 5 is attached by pressing the front and rear walls 5b and 5c from above to engage the hook portion 5j with the locking hole. After that, the concave strip 5f of the guide 5g
The operating rod 87a of the lock 87 is slidably mounted on the. The guide member 5 guides the operating rod 87a and
This is to prevent rattling, that is, lateral vibration when the drawer 3 is closed. That is, when the guide member 5 is attached to a predetermined position of the drawer 3, the sliding contact surface 5h of the rib 5e between the front wall 5b and the rear wall 5c is in a state in which the drawer 3 is closed to the most retracted position. A stopper (not shown) made of synthetic resin that is slidably contacted with the inner surface of the side wall 11 and the upper surface of the base 5a is in contact with the front end surface of the side wall 11 and is attached to the right side surface of the body plate 31 of the drawer 3.
The drawer 3 is regulated from moving in the left-right direction (lateral swing) and moving backward (Fig. 6).

The transparent window 88 is formed inside the front edge of the side wall 11, and the lock 87 is provided when the locking operation is performed.
The operating rod 87a enters into the transparent window 88 and can press the other rotating edge 81b of the locking lever 81 located inside thereof. Such a guide member 5 and a transparent window 88
In the above configuration, the lock lever 81 is rotated around the shaft portions 81j, 81k against the urging force of the elastic urging mechanism 86, so that the lock claws 84a, 84b, 84c are moved to the claw projecting openings 85a, 85b. , 85c, and the drawers 2, 3 and 4 can be locked by the lock claws 84a, 84b and 84c, respectively.

That is, in this embodiment, as shown in FIG. 3, the protrusion 24 of the upper drawer 2 is provided with an engaging hole 25 facing the claw protrusion 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 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.

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

In the above construction, when the drawer locking device 8 is assembled, the locking lever 81 is first 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.

Then, 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 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
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 a locking operation is performed from this state to move the operating rod 87a of the lock 87 to the left in FIG. 6, the tip of the operating rod 87a guided by the guide member 5 causes the other turning edge of the locking lever 81 to move. 81b is pressed to the left, and this locking lever 81 rotates in the thickness direction with the shafts 81j, 81k as the core, and the lock claws 84a, 84b, 84c projecting from the one rotation edge 81s. The claw protrusions 85a, 85b, 85c are simultaneously projected (shown by phantom lines in FIGS. 5 and 6). As a result, the lock claw 84a engages with the corresponding engagement hole 25 of the drawer 2 to lock the drawer 2 and the lock claw 84a.
b and 84c are located immediately before the protrusions 35 and 45 of the drawers 3 and 4, and the movement of the drawers 3 and 4 is prohibited.

If this is the case, the lock 87
It is not necessary to mechanically connect the operating rod 87a of the locking lever 81 to the locking lever 81, and the locking lever 8a is locked by the operating rod 87a when locking.
Since it is only necessary to press the rotating edge 81b of No. 1, the lock 87
Even if it is provided in the drawer that can be attached to and detached from the sleeve body 1, there is no trouble in attaching and detaching 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 in the upper drawer 2.

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]

As described in detail above, according to the present invention, even if there is a distance to the side wall on which the lock is attached, the lock is attached to the drawer near the center of the front member. Since the member guides the operating rod of the lock that responds to the locking operation to the predetermined position, the operating rod can be reliably brought into contact with the locking lever. In addition, the guide member has a sliding contact surface with the side wall of the main body, and functions as a member that prevents lateral vibration when the drawer is closed.

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. Also, the shaft
Made by pressing an anti-gold material into a circular arc shape in cross section
As a result, it is easy to manufacture and contributes to cost reduction.
There is also the effect of doing. In particular, if the locking claw is integrally cut and raised from the locking lever, the number of parts can be reduced as much as possible, and it is possible to cope with automatic assembly work by a robot and the like 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 concave groove side of the shaft portion on the inner circumference. It is possible to support the shank without rattling in the 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 a front view and left and right side views of a guide member of the embodiment.

FIG. 8 is an enlarged perspective view showing an engagement hole portion of an upper drawer of the embodiment.

9 is a sectional view taken along the line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sleeve main body 2, 3, 4 ... Drawer 5 ... Guide member 5h ... Sliding contact surface 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 ... Other rotating edge 82j, 83k ... Shaft holes 84a, 84b, 84c ... Lock claws 85a, 85b, 85c ... Claw projecting opening 86 ... Elastic biasing mechanism 87 ... Lock 87a ... Operating rod

Claims (3)

(57) [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 in the space between the outer plate and the inner plate at the center of both upper and lower ends. The plate-shaped locking lever that has been housed is housed so that it can be rotated in the thickness direction around its shaft portion, and one rotation edge of this locking lever has a number of lock claws corresponding to the number of drawer steps. And a pawl projecting opening through which the lock pawls can pass, the locking lever is urged to rotate in the direction in which each lock pawl is retracted into the side wall by an elastic urging mechanism. In addition, a guide member for guiding the lock operating rod in the direction of the locking lever is attached to the rear surface of the front member of the drawer, and when the other rotating edge of the locking lever is pressed by the operating rod, the lock pawl is locked. Lock that is configured to project all at once from the claw projection port By be one obtained by adapted to lock the drawer, respectively, the shaft portion, the cross-sectional sheet metal material
A drawer, characterized in that the guide member is press-formed into an arc shape, and the guide member is provided with a sliding contact surface for preventing lateral vibration of the drawer closed by sliding contact with the side wall of the main body. Locking device. 2. 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 in the space between the outer plate and the inner plate at the upper and lower end centers. The plate-shaped locking lever that has been housed is housed so that it can be rotated in the thickness direction around its shaft portion, and one rotation edge of this locking lever has a number of lock claws corresponding to the number of drawer steps. And a pawl projecting opening through which the lock pawls can pass, the locking lever is urged to rotate in the direction in which each lock pawl is retracted into the side wall by an elastic urging mechanism. In addition, a guide member for guiding the lock operating rod in the direction of the locking lever is attached to the rear surface of the front member of the drawer, and when the other rotating edge of the locking lever is pressed by the operating rod, the lock pawl is locked. Lock that is configured to project all at once from the claw projection port By be one obtained by adapted to lock the drawer, respectively, the shaft portion, the cross-sectional sheet metal material
The surface part is formed by pressing into an arc shape, and the lock
The drawer locking device , wherein the claw is cut and raised from the locking lever, and the guide member is provided with a sliding contact surface for preventing lateral vibration of the drawer closed by sliding contact with the side wall of the main body. . Wherein the shaft portion of the locking lever, characterized in that it is carried by a substantially heart-shaped shaft hole having a protrusion for supporting the recessed groove side of the shaft portion on the inner peripheral claim 1 or 2 Drawer locking device described.