JPH08246734A - Locking device for drawers in furniture - Google Patents

Abstract

(57) [Summary] [Object] To provide a simple locking device having a structure capable of safely locking another drawer in a storage position when one drawer is pulled out. [Structure] A cam means is provided on each drawer 2 or a member that moves back and forth as the drawers are taken in and out, and a plurality of arms 14 are provided on the key bar 8 so as to correspond to each cam means. When one drawer 2 is pulled forward from the storage position, the arm 14 is rotated together with the key rod 8 by the cam means to engage the hook 10 with the stopper 9 of the other drawer 2. The arm 14 and the hook 10 are integrally molded of synthetic resin.

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 for furniture, and more particularly to a locking device capable of locking another drawer in a storage position when one drawer is pulled out.

[0002]

2. Description of the Related Art Conventionally, furniture such as a file cabinet has been used in which rail bodies are provided on the left and right inner side surfaces of a cabinet body having an opening on the front side with a vertical interval, and a drawer is freely inserted into and pulled out from each rail body. There is. In this type of furniture, a stopper is generally provided on the outer surface of each drawer, while a key bar is rotatably provided vertically inside the cabinet body. A plurality of hooks are provided so as to project, and each hook is configured to be disengaged from a corresponding stopper by rotating a key bar with a locking device provided in the cabinet body. Therefore, when the locking device is operated with the key to rotate the key rod in the lock direction, all the hooks engage with the corresponding stoppers, so that all the drawers can be locked at the storage position. Further, when the locking device is operated by the key to rotate the key rod in the unlocking direction, all the hooks are disengaged from the corresponding stoppers, so that all the drawers can be pulled out.

However, in such furniture, 1
When one drawer is pulled out, the other drawer is unlocked, so that a plurality of drawers may be pulled out at the same time, the weight balance of the furniture may be lost, and the furniture may fall down.

Therefore, the inventor of the present invention keeps a simple structure using a key rod which is locked and unlocked by a locking device, and when one drawer is pulled out, another drawer is safely placed in a storage position. We have developed a drawer lock device (Japanese Patent Application No. 5-352164) for furniture that can be locked in a room.

[0005]

The above-mentioned locking device has one
The advantage is that when one drawer is pulled out, the other drawer can be safely locked in the storage position.
However, in addition to the plurality of hooks, it is necessary to attach a plurality of arms including rollers to the key rod, which increases the number of parts and causes the increase in man-hours in the manufacturing process.
Therefore, there is a problem that the number of parts is reduced and the number of steps in the manufacturing process is reduced.

Therefore, an object of the present invention is to provide a drawer locking device having a simple structure.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is to provide rail bodies on the left and right inner side surfaces of a cabinet body having an opening on the front side with a vertical space provided therebetween, and each rail body is provided. The drawer is supported freely in and out of the drawer, stoppers are provided on the outer surface of each drawer, and a key bar is rotatably installed vertically inside the cabinet body. The hooks are projected and the lock is provided on the cabinet body to rotate the key bar so that each hook is engaged with and disengaged from the corresponding stopper, and moves back and forth as each drawer or each drawer is taken in and out. A cam means is provided on the member, and a plurality of arms are projected on the key bar corresponding to each cam means. When one drawer is pulled forward from the storage position, the arm is rotated together with the key stick by the cam means. Move to strike another drawer The lock device of drawers in furniture which is adapted to engage the hook path, characterized by being integrally molded by synthetic resin and the arm and the hook.

According to a second aspect of the present invention, in the lock device according to the first aspect, each rail body has a fixed rail fixed to the left and right inner side surfaces of the cabinet body, and a movable rail supported by the fixed rail. A roller supporting the drawer is rotatably supported on the movable rail, and the roller is configured to move the movable rail forward by rolling the fixed rail when the drawer is pulled out forward. The means comprises an outer surface of the movable rail and a window portion opening to the outer surface, and the arm of the key rod is configured to engage with the window portion of the movable rail when the drawer is in the storage position. Characterize.

According to a third aspect of the present invention, in the lock device according to the first aspect, the cam means includes an outer surface of the drawer and a window portion opened to the outer surface, and the arm of the key rod is housed in the drawer. It is characterized in that it is adapted to engage the window of the drawer when in the position.

According to a fourth aspect of the present invention, in the lock device according to the second or third aspect, the arm is pivotally supported by the support piece fixed to the key bar and the support piece corresponding to the window portion. It is characterized by comprising a roller.

[0011]

In the lock device according to the first aspect, when the lock device is operated by the key to rotate the key rod in the lock direction,
Since all hooks engage the corresponding stoppers, all drawers can be locked (locked) in the storage unit. Further, when the locking device is operated by the key to rotate the key bar in the unlocking direction, all the hooks are disengaged from the corresponding stoppers, so that all the drawers can be pulled out. further,
When one drawer is pulled forward from the storage position, the arm can be rotated together with the key bar by the cam means to engage the hook with the stopper of another drawer, so that when one drawer is pulled out. Other drawers can be safely locked in the storage position (safety lock). Moreover, since the hook and the arm are integrally formed, the number of parts is not increased and the attachment of the key stick is simplified.

In the lock device according to the second aspect, when the drawer is pulled out forward, the tip of the movable rail moves to the front of the cabinet body to support the drawer, so that each drawer can be pulled out largely forward. Becomes Also,
Since the cam means is composed of the outer surface of the movable rail and the window portion opened to this outer surface, it is not necessary to form a window portion for engaging the arm on the outer surface of the drawer. Therefore, it is possible to prevent the stored items such as files inside the drawer from being scratched by the arm, and the coating surface on the outer surface of the drawer from being scratched by the arm.

In the lock device according to the third aspect of the present invention, since the cam means comprises the outside surface of the drawer and the window portion opened to this outside surface, the rail body for supporting the drawer has a simple structure of only the fixed rail. be able to.

According to another aspect of the lock device of the present invention, the arm is composed of a support piece fixed to the key bar and a roller pivotally supported by the support piece corresponding to the window portion, so that one drawer is pulled out. At this time, the roller can be easily pushed out of the window while rotating the roller at the edge of the window. Therefore, the safety lock operation of the drawer can be smoothly performed.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment in which the lock device according to the present invention is applied to a file cabinet. First, referring to FIG. 1 to FIG. 3, a file cabinet has a cabinet main body having an opening on the front surface, and a plurality of upper and lower drawers are freely retractable.

As shown in FIG. 1, the rail body for supporting each drawer 2 is a fixed rail 3 having a substantially U-shaped cross section fixed to the left and right inner side surfaces of the cabinet body 1 (only one inner side surface is shown).
And a movable rail 4 having a substantially U-shaped cross section which is inserted into and supported by the fixed rail 3. A roller 5 that abuts the lower surface of the upper surface 3a of the fixed rail 3 is pivotally supported at the rear end of the movable rail 4, and the bottom surface of the fixed rail 3 is near the front end and the rear end of the movable rail 4, respectively. 3b
A roller 6 that is in contact with the upper surface of is supported. On the other hand, a vane 7 extending in the front-rear direction is projectingly provided on the outer surface of each drawer 2, and the drawer 2 is supported on the upper surface of the roller 6 by bringing the lower surface of the vane 7 into contact with the upper surface of the roller 6. It is supposed to be done.

According to the rail body structure described above, when the drawer 2 is pulled out toward the front of the cabinet body 1, the vanes 7 rotate the rollers 6, so that the rollers 6 roll on the bottom surface 3b of the fixed rail 3, As a result, the movable rail 4 moves to the front of the cabinet body 1. Therefore, when the drawer 2 is pulled out in front of the cabinet body 1, the movable rail 4
Since the tip end of the drawer moves to the front of the cabinet body 1 to support the drawers 2, each drawer 2 can be largely pulled out forward.

As shown in FIGS. 1 and 2, a key bar 8 is rotatably provided vertically inside one side of the cabinet body 1 and corresponds to a stopper 9 projecting on the outer surface of each drawer 2. Then, for example, a U-shaped hook 10 is fixed to the key rod 8.

As shown in FIG. 1, the cabinet body 1 is provided with a locking device 11. The locking device 11 is supported by an upper front surface portion of the top plate 1a of the cabinet body 1 and a front reinforcing plate fixed inside the top plate 1a, and is movable back and forth. FIG. 1 shows an unlocked state in which the locking device 11 projects to the front of the cabinet body 1. When the locking device 11 is pushed backward and a key (not shown) inserted in the key insertion portion 11a of the locking device 11 is turned, the locking device 11 is locked at the pushed locking position. . A lever 12 extending rearward is attached to the locking device 11, a long hole 12a extending in the front-rear direction is formed in the lever 12, and the key bar 8 has its upper end bent at a right angle to form an arm portion. 8a is formed, and this arm portion 8a penetrates the long hole 12a of the lever 12. A tension spring 13 is attached between the tip of the arm portion 8a and the front reinforcing plate.

When the locking device 11 is in the unlocked position, FIG.
Also, as shown in FIG. 2, each hook 10 fixed to the key rod 8 is separated from the stopper 9 of each drawer 2. When the locking device 11 is pushed backward, the key rod 8 rotates clockwise in FIG. 1 against the spring force of the tension spring 13, whereby each hook 10 engages with the stopper 9 of each drawer 2. Therefore, all the drawers 2 are locked (locked) in the storage position.

As shown in FIG. 1, side walls of the fixed rail 3 and the movable rail 4 are provided with windows 3c and 4a which coincide with each other when the drawer 2 is in the storage position, and are fixed to the key rod 8. From the outside of the side wall of the rail 3, the window 4 of the movable rail 4
An arm 14 that engages with a is provided. In this embodiment, the arm 14 includes a support piece 15 fixed to the key rod 8,
The roller 16 is axially supported by the support piece 15 corresponding to the window 4a of the movable rail 4 (FIG. 2).

In the drawer lock device of the file cabinet having the above-mentioned structure, since the movable rail 4 moves forward when one drawer 2 is pulled out from the storage position to the front, the roller 16 of the arm 14 moves to the movable rail 4. Since it abuts on the edge of the window 4a and rides on the outer surface of the movable rail 4 while rotating, the key rod 8 rotates in the locking direction, and the hook 10 is attached to the stopper 9 of the other drawer 2 as shown in FIG. Engage. Therefore, when one drawer 2 is pulled out, the other drawer 2 can be safely locked in the storage position (safety lock).

Further, since the cam means is composed of the outer side surface of the movable rail 4 and the window portion 4a opened to the outer side surface, the drawer 2 is provided.
It is not necessary to form a window portion for engaging the arm 14 on the outer side surface of the. Therefore, it is possible to prevent the stored items such as files inside the drawer 2 from being scratched by the arm and the coating surface on the outer surface of the drawer 2 from being scratched by the arm 14.

Further, in the lock device having the above-mentioned structure, the arm portion 8a at the upper end of the key rod 8 is engaged with the long hole 12a of the lever 12 of the locking device 11, so that the safety when one drawer 2 is pulled out. During the locking operation, the arm portion 8a moves rearward in the long hole 12a of the lever 12, and the locking device 11 is kept in the protruding (unlocking) position. At this time, the locking device 11 is released from the spring force of the tension spring 13 and can move back and forth. Functionally, this is not a problem, but the locking device 1
Another spring (not shown) to prevent rattling of 1
It is also possible to urge the locking device 11 in the protruding (unlocking) direction with. Also, instead of the elongated hole 12a, the lever 12 may be provided with a round hole or the like adapted to the arm portion 8a.

Next, FIGS. 4 to 6 show a molding member 18 which is a characteristic part of the hook device according to the present invention.

As can be clearly understood from FIG. 4, the molding member 18 is integrally molded of synthetic resin and integrally includes the hook 10 and the arm 14. The hook 10 and the arm 14 perform the functions described above with reference to FIGS. As described above, the arm 14 includes the support piece 15 and the roller 16 axially supported by the support piece 15. The hook 10 is formed in a long hole shape having a rectangular cross section. The roller 16 has a support pin 19
It is rotatably supported by the support piece 15.

As shown in FIGS. 4 and 5 (a), the columnar portion 20 includes a support piece 1 for the upper and lower hooks 10 and arms 14.
It is a part integrally molded as a part of the molding member 18 for connecting the five. The rear portion 10a of the hook 10 and the front portion 15a of the support piece 15 are vertically continuous via the columnar portion 20, and the rear portion 10a, the columnar portion 20, and the front portion 15 are provided.
A groove 21 having a semicircular cross section is formed through a.
The rear portion 10a is connected to the attachment portion 23 on the hook 10 side through the flexible portion 22 on the hook 10 side, and the front portion 15a.
Is continuous with the attachment portion 25 on the support piece 15 side through the flexible portion 24 on the support piece 15 side. The mounting portion 23 is provided with a concave groove 26 having a semicircular cross section, and the concave groove 26 is joined to the concave groove 21 of the rear portion 10a by the bending of the flexible portion 22 to form a hollow portion having a circular cross section. be able to. The mounting portion 25 is provided with a concave groove 27 having a semicircular cross section, and the concave groove 27 is formed by
By bending, the hollow portion having a circular cross section can be formed by joining with the concave groove 21 of the front portion 15a.

On the other hand, the key rod 8 used in this embodiment.
Is provided with projections 8b, 8b and 8c, 8c having rectangular cross sections opposite to each other with respect to the axial center. Corresponding to the protrusions 8b, 8b, a recessed groove 21 is formed in the rear portion 10a.
The recesses 28, 28 having a rectangular cross-section that are continuous with each other are formed, and the mounting portion 23 is provided with a recess 29 having a rectangular cross-section.

A front portion 15a corresponding to the protrusions 8c, 8c
Has a rectangular cross section, which is continuous with the concave groove 21.
The mounting portion 25 is formed with a recess 31 having a rectangular cross section.

Further, as understood from FIGS. 4 and 5 (b), the flexible portion 22 is formed in a thin shape so that it can be bent easily. Further, the mounting portion 23 includes an engaging portion 32. When the flexible portion 22 is bent and the concave groove 26 and the concave groove 21 are joined, the engaging portion 32 hooks 1.
It fits in the engagement hole 33 between 0 and the rear part 10a. The engaging part 32 has an engaging claw 32a, and the engaging claw 32a is locked to a step part 33a provided in the engaging hole 33. Further, the engaging portion 32 has a constricted portion 32b, and the constricted portion 32b.
Engages with the engagement protrusion 33b of the engagement hole 33.

Further, as can be understood from FIGS. 4 and 5 (c), the flexible portion 24 is formed in a thin shape so that it can be bent easily. The mounting portion 25 also includes an engaging portion 34. When the flexible portion 24 is bent and the concave groove 27 and the concave groove 21 are joined to each other, the engaging portion 34 supports the support piece 1.
5 is fitted in the engaging hole 35 provided in the No. 5. The engaging portion 34 has an engaging claw 34 a, and the engaging claw 34 a is locked in the engaging hole 35.

When the molding member 18 is mounted on the key rod 8 having the above structure, first, the key rod 8 is arranged in the groove 21. At this time, the protrusions 8b and 8b are aligned with the recesses 28 and 28, and the protrusions 8c and 8c are aligned with the recesses 30 and 30.

Thereafter, by bending the flexible portion 22, the concave groove 26 is joined to the concave groove 21 of the rear portion 10a, and the key rod 8 is stored in the cylindrical hollow portion formed. At this time, one of the protrusions 8b is stored in a rectangular parallelepiped hollow portion formed by joining the concave portion 28 and the concave portion 29 near the flexible portion 22.
The other concave portion 28 faces the end surface 26a of the concave groove 26 near the engaging portion 32, but this end surface 26a is set back to the same degree as the concave portion 29 (Wa in FIG. 5B). . As a result, the other protrusion 8b is stored in the gap formed by the recess 28 and the end surface 26a. In this state, the engaging portion 32 fits into the engaging hole 33, and the engaging claw 32a of the engaging portion 32 is locked to the step portion 33a. As described above, the mounting operation of the molding member 18 on the hook 10 side is completed.

By bending the flexible portion 24,
The concave groove 27 is joined to the concave groove 21 of the front portion 15a, and the key rod 8 is stored in the cylindrical hollow portion formed. At this time, one projection 8c is stored in a rectangular parallelepiped hollow portion formed by joining the concave portion 30 and the concave portion 31 near the flexible portion 24. Further, the other concave portion 30 has a concave groove 2 near the engaging portion 34.
7, the end surface 27a is set back (Wb in FIG. 5C) to the same extent as the recess 30. As a result, the other protrusion 8c is stored in the gap formed by the recess 30 and the end surface 27a. In this state, the engaging claw 32a of the engaging portion 34 is locked in the engaging hole 35. By the above, the support piece 15 of the molding member 18
The side mounting operation is completed.

FIG. 6 shows a state in which the molding member 18 is attached to the key rod 8 as described above.

Of course, the mounting operation on the hook 10 side and the mounting operation on the support piece 15 side can be performed in reverse order.

In the hook device having the above structure, since the hook 10 and the arm 14 including the support piece 15 are formed as a single member, the number of parts is not increased. Also, the key stick 8
The key rod 8 is disposed in the groove 21, the attachment portion 23 on the hook 10 side is bent by the flexible portion 22, and the attachment on the support piece 15 side is performed in order to store (incorporate) into the molding member 18. It suffices to bend the flexible portion 24 of the portion 25, which does not impose a burden on the manufacturing process. Further, the protrusion 8b provided on the key bar 8 is attached to the mounting portion 2
3 and the rear portion 10a, the protrusion 8c is located in a space (hollow portion or gap) formed between the mounting portion 25 and the front portion 15.
The molding member 18 can be fixed to the key bar 8 with a simple structure by locating the molding member 18 in the space (hollow portion or gap) formed by a. Further, the engaging claw 32a of the engaging portion 32 is locked to the stepped portion 33a, and the engaging claw 32a of the engaging portion 34 is locked to the engaging hole 35, so that the mounting portions 23 and 25 are moved to the rear portion 10a. It can be fixed so as not to be easily separated from the front portion 15a.

As described above, a plurality of molding members 18 can be attached to the key rod 8 according to the number of stages of the drawer.

Although the illustrated embodiment has been described above, the present invention is not limited to the above-described embodiment, and various changes can be made to the shape and the like of each constituent element.

[0041]

As is apparent from the above description, according to the present invention, one drawer is pulled out while maintaining a simple structure using a key rod that is locked and unlocked by a locking device. It is possible to provide a drawer lock device for furniture that can lock other drawers safely at the storage position at times and further reduce the number of parts and the number of steps in the manufacturing process.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of a file cabinet provided with a lock device according to the present invention.

FIG. 2 is a horizontal cross-sectional plan view of a main part of a file cabinet provided with the lock device of the present invention with a part thereof broken away.

FIG. 3 is a view similar to FIG. 2 showing an operating state of the lock device of the file cabinet provided with the lock device of the present invention.

FIG. 4 is an overall perspective view illustrating an embodiment of a molding member used in the lock device according to the present invention.

FIG. 5A is a front view for explaining an embodiment of a molding member used in the locking device according to the present invention. (B) is sectional drawing by the BB line of (a) explaining the Example of the molding member used by the locking device concerning this invention. (C) is a sectional view taken along the line CC of (a) for explaining an embodiment of a molding member used in the locking device according to the present invention.

FIG. 6 is a perspective view illustrating a state where a molding member is attached to a key rod used in the lock device of the present invention.

[Explanation of symbols]

 1 Cabinet body 2 Drawer 2a Window part 3 Fixed rail 4 Movable rail 4a Window part 6 Roller 7 Wing plate 8 Key bar 8a Arm part 9 Stopper 10 Hook 11 Locking device 12 Lever 12a Long hole 13 Tension spring 14 Arm 15 Support piece 16 Roller 17 Lever 18 Forming Member 19 Support Pin 20 Columnar Part 21 Recessed Groove 22 Flexible Part 23 Hook Side Mounting Part 24 Flexible Part 25 Supporting One Side Mounting Part 26 Recessed Groove 27 Recessed Groove 28 Recessed 29 Recessed 30 Recessed 31 Recessed 32 Mating part 32b Constricted part 33 Engagement hole 33b Engagement projection 34 Engagement part 34a Engagement claw 35 Engagement hole

Claims (4)

[Claims] 1. A rail body is provided on the left and right inner side surfaces of a cabinet main body having an open front surface with a vertical interval, and a drawer is freely inserted into and removed from each rail body, and a stopper is provided on an outer side surface of each drawer. , A key rod is rotatably installed vertically inside the cabinet body, and a plurality of hooks are projected on the key rod corresponding to each stopper, and the key rod is rotated by a locking device provided in the cabinet body. By doing so, each hook is engaged with and disengaged from the corresponding stopper, and a cam means is provided on each drawer or a member that moves back and forth as the drawer moves in and out.
A plurality of arms are projected on the key rod corresponding to each cam means, and when one drawer is pulled forward from the storage position, the arm is rotated together with the key stick by the cam means and the stopper of the other drawer is pulled out. A lock device for a drawer in furniture, wherein the hook and the hook are engaged with each other, wherein the arm and the hook are integrally formed of synthetic resin. 2. Each rail body has a fixed rail fixed to the left and right inner side surfaces of the cabinet body, and a movable rail supported by the fixed rail, and a roller supporting a drawer is pivotally supported on the movable rail. The roller is configured to move the movable rail forward by rolling the fixed rail when the drawer is pulled out forward, and the cam means includes an outer surface of the movable rail and a window portion opened to the outer surface. The lock device for a drawer in furniture according to claim 1, wherein the arm of the key bar is configured to engage with the window portion of the movable rail when the drawer is in the storage position. 3. The cam means comprises an outer surface of the drawer and a window portion opening to the outer surface, and the arm is configured to engage the window portion of the drawer when the drawer is in the storage position. The lock device for the drawer of furniture according to claim 1. 4. A drawer for furniture according to claim 2, wherein the arm comprises a support piece fixed to the key bar and a roller pivotally supported by the support piece corresponding to the window portion. Locking device.