JP4964639B2 - Drawer structure - Google Patents

Description

  The present invention relates to a drawer structure in a cabinet or the like used in an office space such as an office.

  In a drawer structure such as a cabinet, a latch device is generally provided in the drawer to prevent the cabinet from being inadvertently moved or the drawer from being accidentally pulled out due to an impact such as an earthquake (for example, a patent) References 1-3).

FIG. 9 is an enlarged cross-sectional view of a main part of a drawer provided with a conventional latch device.
As shown in FIG. 9A, a drawer body 03 that can be pulled out by opening and closing operations in the front-rear direction by a puller 02 is provided in a cabinet 01 having an open front.

  On the back surface of the front plate 04 in the drawer main body 03, an operation shaft 05 that rotates around the horizontal axis in conjunction with the opening / closing operation of the pull handle 02 is provided in the left-right direction. The outer end 05a of the operation shaft 05 is provided. In addition, by engaging and rotating the crank portion 06a of the latch shaft 06, the engagement hole 08 of the latch 07 on the latch shaft 06 is engaged with and disengaged from the engagement claw 09 provided on the inner surface of the cabinet 01, The locked state can be maintained.

The operation shaft 05 is prevented from rotating by the locking of a separate locking device.
However, if the drawer body 03 in the locked state is forcibly pulled forward by a pulling operation by the puller 02, the front plate 04 is greatly moved forward from the normal state indicated by an imaginary line in FIG. Due to the bending of the front plate 04, the outer end 05a of the operation shaft 05 may move forward to rotate the latch shaft 06.

As a result of this rotation, the engagement hole 08 of the latch 07 is disengaged from the locking claw 09 of the cabinet 01, the mooring of the drawer body 03 is released, the lock body is unlocked, the drawer body 03 is pulled out, and security is lowered. There is a risk of doing.
On the other hand, if the strength is increased so that the front plate 04 is not curved, the structure becomes complicated and the cost increases.
JP 2000-037247 A JP 2005-016223 A JP 2003-239605 A

  In the present invention, in view of the above situation, even if the drawer main body in the locked state is forcibly pulled forward by a pulling operation by a puller, the drawer mooring is released and the drawer main body is pulled out. The object is to provide a drawer structure with high security.

The above-described problems are solved by the invention having the following configuration, as described in each claim in the section “Claims”.
(1) It is attached to the front plate of the drawer body provided so as to be able to be pulled out in the front-rear direction in a space that opens forward in the housing so that it can rotate around the axis in the left-right direction according to the drawer opening / closing operation. A puller, an operation shaft projecting from the puller in the left-right direction, and a lock mechanism linked to the operation shaft and preventing the drawer body from being pulled out of the housing. By operating the lock mechanism in conjunction with the rotation of the operation shaft, the drawer main body that is always locked is unlocked, and the locking operation prevents the operation shaft from rotating. In the drawer structure equipped with a locking device that prevents the drawer body from opening and closing, a locking member is provided on the back surface of the front plate from the intermediate position in the left-right direction between the puller and the locking mechanism to the rear, Drawers in When the central part of the front plate is bent forward by the forward force applied to the puller of the main body, the abutment member pushes the middle part of the operation shaft backward, so that the outer end of the operation shaft is locked. The vehicle is to be disengaged backward from the linkage state with the mechanism.

(2) In the above item (1), the lock mechanism is provided on the latch shaft that is linked to the operation shaft that is interlocked according to the pulling-out operation of the puller and rotates around the vertical axis. An inner wall that forms the space that opens forward in the housing by rotating the latch shaft in conjunction with the operation shaft. A latching claw projecting inward in the left-right direction is engaged with and disengaged from an engagement hole of the latch in the latch shaft, so that the drawer body can be anchored or detached from the housing.

(3) In the above item (2), the latch shaft is urged to rotate in a direction in which the engagement hole of the latch engages with the locking claw of the housing.

(4) In the above item (2) or (3), a gap is formed between the linkage portion between the outer end of the operating shaft and the latch shaft.

(5) In the above item (4), the puller or the operation shaft is urged to rotate in the direction opposite to the rotation direction when the drawer body is pulled out.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the abutting member is provided on the back surface of the front plate so as to protrude rearward from the intermediate position in the left-right direction between the puller and the lock mechanism, and the puller of the drawer main body in the locked state When the center part of the front plate is bent forward by the forward force applied to the front plate, the abutment member pushes the middle part of the operation shaft backward, so that the outer end of the operation shaft is linked to the lock mechanism. Since the drawer body in the locked state is forcibly pulled forward by the pulling operation of the puller, the mooring of the drawer is released and the drawer body is pulled out. There is nothing, and security can be improved.

  According to the second aspect of the present invention, the lock mechanism can be smoothly locked and unlocked by the linkage of the operation shaft and the latch unit.

  According to the invention described in claim 3, since the latch shaft is urged to rotate in the direction in which the latch engagement hole engages with the latching claw, it is possible to effectively prevent the pull-out mooring from coming off. Can do.

  According to the fourth aspect of the present invention, since the gap is formed between the outer end of the operation shaft and the linkage portion of the latch shaft, the drawer main body in the locked state is directed forward by the pulling operation by the puller. Even if it is forcibly pulled out, there is a play allowance for the gap, and accordingly, the outer end of the operation shaft and the latch shaft are not linked, and the mooring of the drawer can be effectively prevented. .

  According to the fifth aspect of the present invention, since the puller or the operation shaft is urged to rotate in the direction opposite to the rotation direction at the time of the drawer operation of the drawer body, the operation shaft is at the time of the drawer operation by the puller. In the locked state of the drawer body, the width of the gap between the outer end of the operation shaft and the linkage portion of the latch shaft can be kept constant at all times.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a cabinet provided with a drawer structure according to a first embodiment of the present invention, and FIG. 2 is an enlarged vertical sectional view of a main part of a front part of a drawer body taken along line II-II in the figure. FIG. 4B is a view illustrating a state in which the rotation of the puller is restricted to the rear by the rotation restricting member when the latch unit is in a locked state, and FIG. 3 is an enlarged cross-sectional view of the main part showing the locked state of the latch unit taken along line III-III in FIG. 1, FIG. 4 is an enlarged perspective view of the main part of the latch unit, and FIG. 5 is an unlocked state of the latch unit. FIG. 6 is an enlarged cross-sectional view of the main part showing the behavior of the operation shaft when the front plate is deformed by an excessive pulling operation toward the front by a pulling hand when the drawer is locked. FIG.

  As shown in FIG. 1, a drawer body 4 that can be locked or unlocked by a locking device 3 in a space 2 in which a front surface 1 a of the cabinet 1 is opened is pulled out in the front-rear direction over a plurality of stages. It is provided as possible.

  As shown in FIG. 2, the drawer body 4 has a front plate 5 that closes the front opening of the space 2 in the cabinet 1 at the front end, and a handle frame 6 is provided at the center of the front plate 5. In the handle frame 6, a handle 7 is attached so as to be able to rotate around a horizontal axis in accordance with a drawer opening / closing operation.

  As shown in FIG. 3, the puller 7 is provided at the center of an operation shaft 8 that protrudes in the left-right direction on the back surface of the front plate 5, and this operation shaft 8 is used for the drawer opening / closing operation of the puller 7. It rotates in conjunction with each other and can be linked to a latch unit described later.

When the drawer body 4 is locked by the rotation restricting member 9 linked to the locking device 3, the operation shaft 8 is moved by the rotation restricting member 9 as shown in FIG. Thus, the rotation is prevented so as not to be interlocked with the pulling-out operation of the puller 7.
When unlocking, as shown in FIG. 2 (b), the locking portion 3 a of the locking device 3 is linked so that it can be detached from the rotation restricting member 9, thereby interlocking with the pulling operation of the puller 7. It can be rotated.
The locking device 3 is locked or unlocked by a key operation. Thereby, the mechanism itself that regulates the rotation of the operation shaft 8 via the rotation regulating member 9 is well known. Detailed description is omitted.

  As shown in FIG. 4, the outer end 8 a of the operation shaft 8 is bent downward in a crank shape and rotated around the vertical axis on the back surface of the front plate 5. It is linked to.

  A latch 11 is provided at the lower end of the latch shaft 10, and an engagement hole 12 in the left-right direction is formed through the latch 11.

  The latch shaft 10 is linked to the outer end 8a of the operation shaft 8 and operates so as to be able to rotate around the vertical axis. The spring 13 causes the engagement hole 12 in the latch 11 to move forward in the cabinet 1. Is always urged clockwise in a plan view to engage with a locking claw 14 projecting inward in the left-right direction on the inner wall 1b of the space 2 that opens to maintain the locked state (FIG. 3). reference).

As shown in FIG. 5, the latch 11 is rotated counterclockwise against the biasing force of the spring 13 through the operation shaft 8 by the pulling operation by the puller 7, and thereby the latch 11. The engagement hole 12 and the locking claw 13 are disengaged, and the lock is released.
The locking mechanism is constituted by a latch unit including the latch shaft 10, the latch 11, the engagement hole 12, and the locking claw 14.

  As shown in FIG. 3, a contact member 15 is provided on the back surface of the front plate 5 of the drawer body 4 so as to protrude rearward at a substantially intermediate position in the left-right direction between the pull 7 and the latch unit. .

  The contact member 15 is in contact with the operation shaft 8 from the front, and the operation shaft 8 has a flat surface extending from an intermediate portion of the contact portion of the contact member 15 to the outer end 8a. It is bent in a dogleg shape toward the rear in view.

In the locked state of the drawer body 4 by the locking device 3, the forward force applied by the drawer operation by the puller 7 tries to pull out the drawer body 4 forcibly toward the puller 7 of the drawer body 4. When a force is applied, as shown in FIG. 6, the central portion of the front plate 5 is bent in a bow shape from the normal position indicated by the imaginary line to the front indicated by the solid line. In response to the deformation, the abutting member 15 pushes the intermediate portion of the operation shaft 8 rearward, so that the linkage between the outer end 8a of the operation shaft 8 and the crank portion 10a of the latch shaft 10 in the latch unit is released rearward. It is supposed to let you.
For this reason, the outer end 8a of the operation shaft 8 is linked with the crank portion 10a of the latch shaft 10, and the engagement hole 12 of the latch 11 does not come off from the locking claw 14 of the cabinet 1 and is locked. Even if the drawer body 4 is forcibly pulled forward by the puller 7, the drawer mooring is not released and the drawer body 4 is not pulled out, so that the security can be improved.

  FIG. 7 is an enlarged cross-sectional view of the main part showing the locked state of the latch unit according to the second embodiment of the present invention, and FIG.

  The difference from the first embodiment is that, as shown in FIG. 7, the outer end 18a of the operation shaft 18 provided on the back surface of the front plate 17 in the drawer body 16, and the crank portion 19a of the latch shaft 19 in the latch unit. As shown in FIG. 8, the operating shaft 18 is reversely rotated in the pulling operation of the drawer body 16 by the spring 22 assembled to the rotation restricting member 21 as shown in FIG. Being biased in the direction.

As a result, in the locked state of the drawer body 16, there is a play allowance corresponding to the width of the gap 20, even if it is forcibly pulled forward by the pulling operation of the puller 23, and the outer end 18 a of the operation shaft 18 correspondingly. And the latch shaft 19 are not linked to each other, so that the mooring of the drawer is not released and the drawer body 16 is not pulled out, so that the security can be improved.
Further, since the operating shaft 18 is biased by the spring 22 in a direction opposite to the rotating direction when the drawer body 16 is pulled out, the operating shaft 18 is rotated when the drawer 23 is pulled out. The position can be returned to the original position, and the width of the gap 20 between the operating shaft 18 and the linkage portion of the latch shaft 19 can be always kept constant in the locked state of the drawer body 16.

It is a front view of the cabinet provided with the drawer structure of 1st Embodiment of this invention. FIG. 2 is an enlarged vertical cross-sectional view of a main part of the front part of the drawer main body taken along line II-II in FIG. (b) is a figure which respectively shows the rotation state to the front of a puller in the unlocking state of a latch unit. It is a principal part expanded horizontal sectional view which shows the locked state of the latch unit in the III-III line of FIG. It is a principal part expansion perspective view of a latch unit. It is a principal part expanded horizontal sectional view which shows the lock release state of a latch unit. Similarly, it is a principal part expanded cross-sectional view which shows the behavior of the operation axis | shaft when a front plate deform | transforms by the forced pull-out operation toward the front by the pulling hand at the time of drawer lock. It is a principal part expanded horizontal sectional view which shows the locked state of the latch unit in 2nd Embodiment of this invention. It is a principal part expansion longitudinal cross-sectional view of a drawer main body front part. It is a principal part expansion cross-sectional view of the drawer provided with the conventional latch apparatus, (a) is the latching state of a latch unit, (b) is also the forcible drawer toward the front by the pulling hand at the time of drawer locking It is a figure which shows the behavior of the operation axis | shaft when a front plate deform | transforms by operation, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cabinet 1a Front surface 1b Inner wall 2 Space 3 Locking device 3a Locking part 4 Drawer main body 5 Front plate 6 Handle frame 7 Pull handle 8 Operation shaft 8a Outer end 9 Rotation restricting member 10 Latch shaft 10a Crank part 11 Latch 12 Engagement hole 13 Spring 14 Locking claw 15 Contact member 16 Drawer body 17 Front plate 18 Operation shaft 18a Outer end 19 Latch shaft 19a Crank portion 20 Gap 21 Rotation restricting member 22 Spring 23 Puller 01 Cabinet 02 Puller 03 Drawer main body 04 Front plate 05 Operation shaft 05a Outer end 06 Latch shaft 06a Crank part 07 Latch 08 Engagement hole 09 Locking claw

Claims (5)

A puller attached to the front plate of a drawer main body that can be pulled out in the front-rear direction in a space that opens forward in the housing so that it can rotate around a left-right axis according to a drawer opening / closing operation. And an operation shaft protruding in the left-right direction from the puller, and a lock mechanism linked to the rotation of the operation shaft and preventing the drawer body from being pulled out from the housing. By operating the lock mechanism in conjunction with the rotation of the operation shaft, the drawer main body that is always locked is unlocked, and the locking operation prevents the operation shaft from rotating. In the drawer structure with a locking device that prevents the drawer body from opening and closing,
A contact member is projected on the rear surface of the front plate from the intermediate position in the left-right direction between the puller and the lock mechanism toward the rear, and the forward force applied to the puller body puller in the locked state When the center part of the face plate is bent forward, the abutment member pushes the middle part of the operation shaft backward, so that the outer end of the operation shaft is detached backward from the linkage state with the lock mechanism. Drawer structure characterized by   The lock mechanism is linked to an operation shaft that is interlocked according to the pulling-out operation of the puller, and rotates around a vertical axis, a latch provided on the latch shaft, and a latch formed on the latch. A latch unit having a joint hole and rotating the latch shaft in conjunction with the operation shaft to project inward in the left-right direction on the inner wall forming the space that opens forward in the housing The drawer structure according to claim 1, wherein the engaging hole of the latch in the latch shaft is engaged with or disengaged from the latching claw so that the drawer body can be anchored or detached from the housing.   The drawer structure for a cabinet according to claim 2, wherein the latch shaft is urged to rotate in a direction in which an engagement hole of the latch is always engaged with a locking claw protruding from the housing.   4. The drawer structure for a cabinet according to claim 2, wherein a gap is formed between the outer end of the operating shaft and the linkage portion between the latch shaft.   5. The drawer structure for a cabinet according to claim 4, wherein the puller or the operation shaft is urged to rotate in the direction opposite to the rotation direction when the drawer body is pulled out.

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