JP2528892Y2 - Multi-stage drawer lock mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lock mechanism that concentrates and locks all drawers on furniture having multiple drawers such as desks, lockers, cabinets, and the like.

[Prior Art] As a conventional lock mechanism of this type, Japanese Utility Model Publication No. 57-38530
And Japanese Utility Model No. 58-35819.

In these lock mechanisms, a vertically long lock plate facing the side portion of all drawers is provided at the front position of the side of the furniture body having multiple stages of drawers, and a locking portion provided on this lock plate and each drawer are provided. All drawers are locked by engaging the engaged engaging portion in a releasable manner.

This lock plate is disposed in a very limited space on the side of the furniture main body and needs to operate in that space. Therefore, in the above-described conventional technology, a lock plate bent into a substantially z-shape is used. , Or by using a lock plate bent in an L-shape and swinging the lock plate around its one end as a rotation center. .

[Problem to be Solved by the Invention] In the above-described related art, the following problems occur in the locking operation, the manufacturing process, and the like.

In other words, in the case where a lock plate bent into a substantially z-shape as shown in Japanese Utility Model Publication No. 57-35819 is provided on the main body side, all operations of the lock plate in the locked state and the unlocked state are also provided on the main body side. It is performed by the lock bar of the locking means.

For this reason, the lock bar is bent or the lock bar is inserted into a hole near the lock portion of the lock plate so as to engage the lock bar on the main body side at a position near the portion where the lock portion of the lock plate is provided. It is necessary to have a complicated structure such as engaging the tip, and there is a problem that the assembly process is complicated. Further, a large space for accommodating the locking means is required for accommodating such a lock bar, so that the size of the locking means cannot be reduced, and an extra space is required in addition to the accommodating space for the drawer. There are also problems. Further, the lock plate may operate irrespective of the operation of the lock bar, and even in the unlocked state, there is a risk of malfunction such as the locked state according to the swing of furniture or the like.

On the other hand, as shown in Japanese Utility Model Publication No. 58-38530, an L-shaped lock plate is provided on the main body, and a locking means for swinging the lock plate is provided on the drawer side. The plate is maintained in the unlocked state by the biasing force of the leaf spring, and the locking means on the drawer side is only small by rotating the lock plate in the unlocked state against the leaf spring to lock the plate. Yes, and the problem of the malfunction described above has been solved.

However, since the lock plate itself is L-shaped,
It is necessary to weld an engagement piece for operating the lock plate by the lock bar (operating rod) of the locking means to the lock plate.

Further, in order to operate the lock bar on the drawer side, it is necessary to incorporate, into the locking means, spring means for applying a biasing force to the lock bar against a leaf spring for biasing the lock plate. Since the spring means urges the lock bar to the unlocked state, there is a problem that the locked state of the lock means cannot be released due to a malfunction or malfunction of the locking device.

In addition, since the lock plate itself is provided with a shaft and the bearing is installed on the furniture body by welding, it is necessary to attach each member separately (with welding work) in the assembly process of the lock mechanism. In addition, since the plate spring for urging and holding the lock plate itself must be riveted or welded to the main body, the manufacturing cost increases and the assembly process becomes complicated due to the increase in the number of parts. Occurs.

Further, in this conventional example, since the position where the lock plate is pressed by the lock bar is far away from the position where the lock plate is spring-biased by the plate spring, the lock plate itself is distorted in the locked state. As a cause, there is a problem that a malfunction occurs such as a deformation of a lock plate during use.

The present invention solves the above-mentioned problems of the prior art,
It is an object of the present invention to provide a lock mechanism that is easy to assemble and is less likely to malfunction.

[Means for Solving the Problems] In order to achieve the above object, in the invention according to claim (1),
A furniture lock mechanism having a multi-stage drawer, wherein each of the engagement portions provided at a predetermined position on a side surface portion of each of the drawers, and each of the engagement portions provided on a lock plate provided on the furniture body. In a multi-stage drawer lock mechanism that concentrates locking of all drawers by releasably engaging a locking portion with a key operation in a state where each drawer is closed, the lock plate includes a wing flat plate portion. And a gutter-shaped vertical groove provided substantially at the center thereof, and the upper and lower ends of the vertical groove are used as bearing recesses. A rotating shaft that protrudes and engages with the bearing recesses above and below the lock plate and supports the lock plate so as to be rotatable about a substantially central longitudinal axis; Spring means for constantly biasing the lock plate in the direction in which the locking portion releases the engaged state Provided between any flat part of the two-wing flat part and the furniture main body, and in any drawer or furniture main body, the other flat part is subjected to the urging force of the spring with all drawers closed. A locking means for locking by turning the lock plate by pushing in the opposite direction is provided.

Further, in the invention according to claim (2), in the above configuration, a storage portion for storing the lock plate is provided in the furniture main body, and the bottom portion of the storage portion has the lower rotation shaft, A lock plate receiving portion for supporting the lock plate at a predetermined height is arranged, and an upper portion fitted to an upper open portion edge of the storage portion in which the upper rotation shaft is disposed above the storage portion. A cover is provided, and the spring means is a coil spring supported on the upper shaft.

[Operation] Since the present invention is configured as described above, the lock plate having the two wing flat portions is rotated around the bearing recesses at the upper and lower ends of the gutter-like vertical groove portion in the substantially central portion thereof, thereby locking the lock plate. The plate is operated against the spring force by the locking means, and the engaging portion of the drawer and the locking portion of the lock plate are releasably engaged.
Here, since the lock plate is always urged by the spring means in the direction of releasing the lock, the lock plate is in the released state unless the locking means is operated, thereby preventing the malfunction of the lock plate.

Furthermore, since the rotating shaft is fitted and installed on the furniture body side and the lock plate is operated stably based on this shaft, malfunctions at the time of operating the lock plate are prevented, and the operation is always smooth. .

Further, the locking means has a structure in which the lock plate is directly pushed into any one of the flat portions of the lock plate to which the biasing force of the spring means is applied, in opposition to the biasing force, and can be stably operated based on the rotating shaft. Even if the locking operation force applied to the lock plate is small, it is sufficient, and no malfunction or malfunction due to distortion or the like of the lock plate occurs.

In addition, in the invention described in claim (2) of the present application,
A storage portion for the lock plate is provided on the furniture main body side, and all of the main parts of the lock mechanism are fitted and stored therein, thereby facilitating the assembly of the furniture main body. That is, in the lock mechanism according to the present invention, it is only necessary to provide the storage portion when manufacturing the furniture main body. In assembling the lock mechanism, the lock receiving portion is fitted into the lower portion of the storage portion, and the lock plate is incorporated. This is completed only by fitting the upper cover to which the spring means is attached later. Here, since the upper cover is fitted to the edge of the upper open portion of the storage space of the furniture body and positioning is performed, the bearing portion for rotating the lock plate can be easily and reliably arranged, and the number of members is reduced. There is also the advantage of being less.

 Hereinafter, the present invention will be described in more detail through examples.

[Embodiment] Fig. 1 is a schematic explanatory view showing a furniture main body installation portion of a lock mechanism according to an embodiment of the present invention.

In this embodiment, a gutter-shaped vertical groove portion 4 is provided at a substantially central portion of the lock plate 1 having the two wing flat plate portions 2 and 5.
The upper and lower ends of the vertical groove 4 serve as bearing recesses. Locking portions 3a and 3b are provided at predetermined positions of the flat plate portion 2. The locking portions are individually provided in accordance with the number of steps of drawing out the furniture and the height of the furniture.

A lock plate receiving member 9 is provided at a predetermined position on the bottom of the storage space 10 having an open portion provided in the furniture main body, and the receiving member 9 is provided with a lower rotating shaft 7b. Have been. Furthermore, on the drawer side of the storage space 10,
Through holes (not shown) at positions corresponding to the locking portions 3a and 3b
Is provided.

Here, since the periphery of the base of the lower rotating shaft 7b of the receiving member 9 becomes the receiving portion of the lock plate 1, the position of the locking portions 3a, b and the like of the lock plate corresponds to the through hole. In such a manner, the arrangement position, shape, size, and the like of the receiving member 9 are determined according to the internal shapes of these storage spaces. In addition, as in the modification shown in FIG. 2, an annularly extended portion is integrally formed below the vertical groove portion of the lock plate 1 ', and the rotation shaft 7b' of the lock receiving portion 9 'is surrounded by this extended portion. It is good also as a structure supported by a shaft.

On the other hand, an upper rotating shaft 7a is provided on the upper cover 8 which fits into the upper opening of the storage space 10, and the coil spring 6 is incorporated in the rotating shaft 7a. The coil spring 6
When the upper cover 8 is assembled, it is a spring member that constantly applies a biasing force to the lock plate 1 in a direction to release the locked state. Further, ribs 8a are provided on the outer peripheral surface of the upper cover 8, so that the installation is ensured by eliminating the backlash when fitting into the storage space 10.

The spring means is not limited to the one using the coil spring 6 as in this embodiment, but may be one using other spring means such as a leaf spring. In the present embodiment, the urging force is directly applied to the flat plate portion 5. However, the present invention is not limited to this, and the lock plate 1 is always rotationally urged in the direction in which the locking portion 3 releases the locked state. Any other spring means may be used.

When assembling the lock mechanism, a furniture body provided with the storage space 10 is manufactured, and the receiving member 9 is fitted into the bottom of the storage space 10. Then, the lock plate 1 is attached to the vertical groove 4
Are assembled so that the lower end of the lower shaft engages with the lower rotating shaft 7b. Further, with the tip of the coil spring 6 attached to the back surface of the flat plate portion 5 of the lock plate 1 (the surface of the lock plate where the locking portion 3 is not provided), the upper rotation shaft 7a of the upper cover 8 is moved. The assembly of the furniture body of the lock mechanism is completed by fitting the upper cover 8 into the upper opening of the storage space 10 so as to engage with the upper end of the vertical groove 4 of the lock plate 1. The locking means will be described later with reference to FIG.

As described above, since the lock mechanism according to the present embodiment has a small number of members and is easy to manufacture, there is an advantage that the manufacturing cost and the work process can be significantly reduced.

Next, an operation state of the lock mechanism according to the present embodiment will be described with reference to FIG. FIG. 3 shows a state in which the drawer 11 is locked.

In this figure, a lock means 15 provided in any drawer or furniture main body, when all the drawers 11 are closed, when the lock bar 14 is caused to enter the storage space 10 by the locking operation. At the same time, lock plate 1
The lock plate 1 is rotated by pushing the flat plate portion 5 against the urging force of the coil spring 6. The storage space 10 is provided with an opening window (not shown) for entering the lock bar 14.

Then, with the rotation of the lock plate 1, the locking portion 3 projects outside the storage space 10 and engages with the engaging portion 13 provided on the side surface of the drawer 11. This engaging portion 13 is engaged with only the engaging portion 3 protruding from the storage space 10 by any structure such as an engaging hole provided in a side surface portion of the drawer 11 or a protruding stopper. What is necessary is just a thing of a structure which matches.

When the locking means 15 is unlocked, the lock bar 14 is pulled into, for example, the drawer 11 provided with the locking means, and at the same time, the lock plate 1 is also pressed by the urging force of the coil spring 6.
Rotating in the opposite direction, the locking portion 3 is drawn into the storage space, and the locked state of the lock mechanism is released.

Here, in the normal use state, the lock plate 1 is always urged to the unlocked state, so that the lock mechanism does not accidentally enter the locked state.

Further, since the rotation of the lock plate 1 is always performed around the groove along the rotation axis, the operation is performed reliably and smoothly, so that a failure or the like hardly occurs.

[Effects of the Invention] As described above, according to the lock mechanism of the present invention, the locking operation can be performed reliably and smoothly, and there is an advantage that the lock is not erroneously locked in the unlocked state.

Further, unlike the conventional lock plate system, the fulcrum portion is firmly fixed, so that the metallic noise during operation can be reduced.

Further, the number of members related to the lock mechanism is reduced, and the assembling thereof is easy, so that there is an advantage that the work efficiency of furniture manufacturing is improved and the member cost burden is reduced.

In addition, since the lock mechanism can be disposed in an extremely small space, there is an advantage that the storage amount of the entire furniture is limited and restrictions on design are reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a furniture main body of a lock mechanism according to one embodiment of the present invention, and FIG. 2 is an explanatory view showing a structure of a lower portion of a lock plate and a lock receiving portion in another embodiment of the present invention. FIG. 3 is an explanatory view showing an operation state of the lock mechanism according to one embodiment of the present invention. [Explanation of Signs of Main Parts] 1 ... Lock plate, 2,5 ... Flat plate portions of lock plate, 3a, b ...
Locking portion, 4 ... vertical groove portion, 6 ... coil spring member, 7a, b ... rotating shaft, 8 ... upper cover, 9 ... lock plate receiving member, 10 ... storage space for furniture body, 11 ... drawer, 12 ... furniture body , 13 ... engaging part, 14 ... lock bar, 15 ... locking means

Claims (2)

(57) [Scope of request for utility model registration] 1. A furniture lock mechanism having a multi-stage drawer, comprising: an engagement portion provided at a predetermined position on a side surface of each drawer; and a lock plate provided on a furniture body. In the lock mechanism of a multi-stage drawer that collectively locks all drawers by engaging each of the provided locking portions in a releasable manner by a key operation in a state where each drawer is closed, the lock plate is And a gutter-shaped vertical groove provided substantially at the center of the two-wing flat portion, and using upper and lower ends of the vertical groove as bearing recesses, and forming one of the two-wing flat portions on the flat portion. Each of the locking portions is protruded, and a rotation shaft that engages with the bearing recesses above and below the lock plate and supports the lock plate so as to be rotatable about a substantially central axis is fitted to the furniture body. The lock plate is normally disposed in the direction in which the protruding locking portion is released from the engaged state. A spring means for rotating and biasing is provided between any one of the two wing flat plate portions and the furniture main body, and any one of the drawers or the furniture main body has the other drawer in a state where all drawers are closed. A lock mechanism for a multi-stage drawer, comprising a locking means for locking by rotating a lock plate by pushing a flat plate portion in a direction against the urging force of the spring. 2. The furniture main body has a storage portion for storing the lock plate, the bottom portion of the storage portion has the lower rotation shaft, and supports the lock plate at a predetermined height. A lock plate receiving portion to be disposed is disposed, an upper rotation shaft is disposed at an upper portion of the storage portion, and an upper cover that fits on an upper open portion edge of the storage portion is disposed, and the spring means includes: The lock mechanism according to claim 1, wherein the lock mechanism comprises a coil spring supported by the upper shaft.