JP2008045339A - Latch device of drawer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the thickness of a front plate of a drawer smaller and secure a large storage capacity, by simplifying the constitution of a latch device and using minimum members. <P>SOLUTION: Back ends of right and left backward rods 5b, protruding from the backside of the front plate 4, of a handle 5 are connected together by means of a horizontally-directed working piece 9. The working piece 9 is moved forward by the operation of the handle 5, and the undersurface piece 21 and backward piece 20 of a latch 17, which is provided on the backside of the front plate 4, are turned by the front surface of the working piece 9, so that an engaging portion 20a can be disengaged from an engaged portion 33 of a case 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drawer latch device used in, for example, a cabinet for storing articles, and in particular, by operating a handle provided on the front surface of the drawer forward, the latch engaging portion and the housing-side engaged portion. It is related with the latch apparatus of the drawer | drawer which made it possible to cancel | release the engagement state and to pull out drawer | drawer forward.

  As the drawer latch device as described above, for example, there are devices described in Patent Documents 1 and 2.

JP 2004-218367 A (FIG. 2 etc.) Japanese Patent Laying-Open No. 2005-16223 (FIG. 2 etc.)

  Each of the conventional drawer latch devices described in Patent Documents 1 and 2 rotates a pair of latches provided on both sides of the drawer around a vertical axis, thereby engaging the housing-side engaged portion. Therefore, the mechanism for operating the left and right latches in synchronization with the operation of the handle is complicated, and the number of parts is large.

  Therefore, it is necessary to secure a relatively large space for assembling each member on the back surface of the front plate of the drawer, which inevitably increases the thickness of the front plate and reduces the effective storage capacity of the drawer. is there. Moreover, since the number of assembling steps and the number of parts are large, the manufacturing cost also increases.

  The present invention has been made to solve the above-mentioned problems, and has a simple structure and uses a minimum number of members, thereby reducing the thickness of the drawer front plate and ensuring a large storage capacity. Another object of the present invention is to provide a drawer latch device capable of reducing the manufacturing cost.

In order to achieve the above object, a drawer latch device according to claim 1 of the present invention comprises:
A handle provided on the front surface of the drawer front plate so that it can be operated in the front-rear direction, and provided on the rear surface side of the front plate and interlocked with the operation in front of the handle so that the engaging portion is a drawer storage case. In a drawer latch device comprising a latch that is separated from the engaged portion of
A pair of handle rods extending in the left-right direction projecting forward of the front plate and extending rearwardly on the left and right sides of the handle rod and supported by the front plate so as to be slidable in the front-rear direction. The rear ends projecting on the back side of the front plate in the both rear side ridges are connected by operating pieces facing in the left-right direction, and the left and right central portions of the back side of the front plate are A rear piece having an upward engaging portion that engages with and disengages from an engaged portion provided on a lower surface of the front end facing the upper end portion of the drawer in the housing; and a downward piece continuously provided on the front end portion. The latch is provided so as to be pivotable about a pivot axis facing in the left-right direction so that the lower end portion of the downward piece faces the front surface of the central portion in the left-right direction of the operating piece, and the engaging portion is the engaged portion The direction in which the lower piece always engages with the front surface of the operating piece. It is characterized in that a biasing means for biasing.
According to this feature, the operating piece connecting the rear ends of the pair of rearward facing rods protruding to the back side of the front plate in the handle that can be operated in the front-rear direction moves forward by the operation of the handle. The downward piece of the latch provided at the center of the back surface of the front plate is rotated forward, the rear piece is rotated downward in conjunction with the downward piece, and the engaging portion is the engaged portion of the housing. With more separation, the drawer can be pulled forward.
Therefore, the structure of the latch device is extremely simple and the number of parts is small, and it is not necessary to secure a large space for assembling the members on the back surface of the front plate, so that the thickness of the front plate is minimized. This can increase the storage capacity of the drawer. Further, since the number of parts and the number of assembling steps are reduced, the manufacturing cost is also reduced.
Furthermore, since the urging means urges the engaging portion in the direction in which the engaging portion engages with the engaged portion and the direction in which the downward piece always contacts the front surface of the operating piece, when the handle is not operated, It is possible to prevent the engaging portion from being easily detached from the engaged portion and the handle from moving in the front-rear direction. Moreover, since only one urging means can be provided, the number of parts is further reduced.

The drawer latch device according to claim 2 of the present invention is the drawer latch device according to claim 1,
A guide member having a backward U-shape in side view for guiding the operating piece so as to be slidable back and forth is provided on both the left and right sides of the latch on the back surface of the front plate.
According to this feature, the operating piece and the handle can move stably in the front-rear direction without wobbling in the vertical direction, and the latch can be operated reliably.

The drawer latch device according to claim 3 of the present invention is the drawer latch device according to claim 1 or 2,
A holding member for slidably holding the left and right rearward ridges is fitted to the front plate so that the front end protrudes forward of the front plate.
According to this feature, the handle can move more stably in the front-rear direction without wobbling in the vertical and horizontal directions.

A drawer latch device according to claim 4 of the present invention is the drawer latch device according to any one of claims 1 to 3,
The latch includes a base member fixed to the back surface of the front plate, and a continuous base portion of the rear piece and the downward piece is pivotally attached to the back surface side of the base member with a pivot shaft facing in the left-right direction, and A torsion spring as an urging means is assembled to the pivot so as to urge in a direction in which the engaging portion engages with the engaged portion and a direction in which the downward piece always contacts the front surface of the operating piece. It is characterized by that.
According to this feature, the rear piece, the lower face piece, the pivot and the torsion spring are assembled in advance to the base member, so that the latch is unitized and only the base member is fixed to the back surface of the front plate. Assembling man-hours for the parts to be greatly reduced.

The drawer latch device according to claim 5 of the present invention is the drawer latch device according to claim 4,
The latch mounting portion on the back surface of the front plate is provided with a concave portion that is recessed forward, and a base member is fixed to the rear surface in the concave portion.
According to this feature, since the rearward projecting dimension of the latch is reduced, the thickness of the front plate can be further reduced, and the storage capacity of the drawer can be further increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a perspective view of a cabinet to which the present invention is applied, FIG. 2 is an enlarged cross-sectional plan view taken along line II-II in FIG. 1, and FIG. 3 is a cross-sectional side view taken along line III-III in FIG. Hereinafter, a case 1 having an opening on the right front side in FIG. 1 will be described. The drawer 2 in three upper and lower stages is accommodated in a frame 3 that defines the inside of the case 1 so as to be able to be drawn forward. ing.

  A handle 5 is provided so as to protrude forward from the front surface of the front plate 4 at the center in the left-right direction near the upper end of the front plate 4 of each drawer 2. The handle 5 includes a handle rod 5a facing in the left-right direction and a pair of rear-facing rods 5b, 5b having a square cross section extending rearward from both left and right ends thereof.

  In the mounting holes 6 and 6 formed in the front plate 4 at positions facing the two rearward flanges 5b, a synthetic resin holding member 7 having a square tube portion 7a at the front end portion is connected to the front plate. 4 is projected from the front and fitted from the front. A rearward flange 5b of the handle 5 is fitted and held in the rectangular tube portion 7a of each holding member 7 so as to be slidable in the front-rear direction.

  In the insertion hole 8 formed in each holding member 7 and opening in the rectangular tube portion 7a, a metal flat plate-like shape that is disposed on the back side of the front plate 4 and has an L shape in a side view facing the left-right direction. Mounting bolts 10, 10 inserted from both rear ends of the operating piece 9 are fitted so as to be movable back and forth, and the front ends of both bolts 10 are internally threaded rearward flanges 5 b fitted into the rectangular tube portion 7 a. Screwed into the hole 11.

  Thereby, the handle 5 is attached to the front plate 4 so as to be movable in the front-rear direction so that both rearward-facing scissors 5b can slide back and forth in the rectangular tube portion 7a, and the left and right rear-facing scissors The rear ends of 5b are also substantially connected by the connecting piece 9. Therefore, regardless of the position of the handle rod 5a of the handle 5, the left and right rearward rods 5b move in the front-rear direction in synchronization.

  A reinforcing piece 12 is fixed to the front surface of the working piece 9 to increase the bending rigidity of the working piece 9. Further, stopper members 13, 13 made of rubber or the like that also serve as a buffer material are fixed to the front surfaces of both end portions of the operating piece 9. Both end portions of the operating piece 9 and the reinforcing piece 12 are slidable back and forth in a pair of guide members 15 and 15 having a backward U-shape in a side view fixed to the back surface of the front plate 4 by bolts 14. It is mated.

  A latch 17 is provided in a recessed portion 16 that is formed in the center of the upper end portion on the back surface of the front plate 4 and is recessed forward. As shown in FIGS. 5 to 7, the latch 17 includes a vertical plate-like base member 19 having a rearward U-shaped support piece 18 continuously provided at the center of the upper rear surface and an upper portion at the rear end. A rearward piece 20 having a hook-like engagement portion 20a, a downwardly-facing piece 21 having a large left-right dimension facing the rearwardly lower side, which is connected to the base portion (front end portion), and a torsion spring 22 are provided. Yes.

  A shaft hole 24 that faces in the left-right direction is penetrated through a continuous base 23 that forms a substantially axial shape of the backward piece 20 and the downward piece 21. A notch groove 25 for inserting the torsion spring 22 is engaged in the central portion of the continuous base 23, and one foot piece 22 a of the torsion spring 22 is engaged on the front surface of the lower end piece 21 on the base end side. A concave groove 26 for stopping is formed respectively.

  A concave groove 27 for locking the other foot piece 22b of the torsion spring 22 is formed at the center of the rear surface of the base member 19.

  Between the left and right side pieces 18a, 18a of the support piece 18, the connecting base 23 is inserted into the notch groove 25 and the torsion spring 22 is inserted, and both the foot pieces 22a, 22b are engaged with the concave grooves 26, 27. Then, the pivot 28 is inserted from one side of the support hole 29 formed in the both side pieces 18a, and the shaft hole 24 and the torsion spring 22 of the connecting base 23 are penetrated to fit into the other support hole 29. As a result, the rear piece 20 and the lower piece 21 are urged upward (upwardly counterclockwise in a side view) by the torsion spring 22 and can be rotated up and down around the pivot 28 on the rear surface of the base member 19. It is pivotally attached.

  As shown in FIGS. 2 and 3, the latch 17 having such a configuration is formed with bolts 31 inserted from the rear into the mounting holes 30, 30 at both left and right ends of the base member 19 on the back surface of the front plate 4. By screwing into the inner surface of the recess 16, the backward piece 20 and the downward piece 21 are positioned above the operating piece 9, and the lower end of the downward piece 21 is caused by the biasing force of the torsion spring 22. It is attached so as to be in contact with the upper front portion of the reinforcing piece 12 at all times. Reference numeral 32 denotes a back cover that covers the operating piece 9, the guide member 15, and the like (not shown in FIG. 2).

  As shown in FIG. 3, the engaging portion 20 a of the rear piece 20 in the latch 17 has a front end portion in the frame portion 4 that faces the center of the upper end portion of the front plate 4 when the drawer 2 is pushed into the housing 1. It engages with the back surface of the downwardly engaged portion 33 attached to the bottom surface.

  When the handle 5 is pulled forward in this state, as shown in FIG. 4, the operating piece 9 and the reinforcing piece 12 move forward, so that the downward piece 21 of the latch 17 is forward and the horizontal piece 20 is downward. Respectively. Thereby, the engagement state of the engaging portion 20a and the engaged portion 33 is released, and the drawer 2 can be pulled forward.

  As described above, in the latch device of the above-described embodiment, the plate-like actuating piece 9 that moves forward in conjunction with the operation of the handle 5 and one latch that is actuated at the center thereof. 17 only needs to be provided on the back side of the front plate 4, so that the structure of the latch device is very simple, the number of parts is small, the thickness of the front plate 4 is minimized, and the storage capacity of the drawer 2 is large. In addition, the manufacturing cost can be reduced.

  Further, the torsion spring 22 assembled to the latch 17 causes the engaging portion 20a of the latch 17 to engage with the engaged portion 33 and the downward piece 21 to always contact the front surface of the operating piece 9. Since it is biased, it is possible to prevent the engaging portion 20a from being easily detached from the engaged portion 33 or moving the handle 5 in the front-rear direction when the handle 5 is not operated, and biasing means. Since only the torsion spring 22 is required, the number of parts is also reduced.

  In the above embodiment, the operating piece 9 is connected to the left and right rearward flanges 5b of the handle 5 via the bolts 10 inserted into the front plate 4. However, the rear flange 5b is long and the front plate 4 You may extend to a back surface and may connect the action | operation piece 9 directly to the rear end. In this case, the holding member 7 can be omitted.

It is a perspective view of the cabinet to which one embodiment of the latch device of the present invention is applied. FIG. 2 is an enlarged cross-sectional plan view taken along line II-II in FIG. 1. It is a vertical side view along the III-III line of FIG. Similarly, it is a vertical side view when the handle is operated forward. It is a disassembled perspective view of a latch. It is a perspective view of the latch after assembly similarly. It is a vertical side view of the VI-VI line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Drawer 3 Frame part 4 Front plate 5 Handle 5a Hand hook 5b Backward ridge 6 Mounting hole 7 Holding member 7a Square cylinder part 8 Insertion hole 9 Acting piece 10 Mounting bolt 11 Female screw hole 12 Reinforcing piece 13 Stopper member 14 Bolt 15 Guide member 16 Recess 17 Latch 18 Support piece 18a Side piece 19 Base member 20 Backward piece 20a Engaging part 21 Downward piece 22 Torsion spring 22a, 22b Foot piece 23 Consecutive base 24 Shaft hole 25 Notch groove 26, 27 Recessed groove 28 pivot 29 support hole 30 mounting hole 31 bolt 32 back cover 33 engaged portion

Claims (5)

A handle provided on the front surface of the drawer front plate so that it can be operated in the front-rear direction, and provided on the rear surface side of the front plate and interlocked with the operation in front of the handle so that the engaging portion is a drawer storage case. In a drawer latch device comprising a latch that is separated from the engaged portion of
A pair of handle hooks extending in the left-right direction projecting forward of the front plate, and extending rearwardly on the left and right sides of the handle rod, and supported by the front plate so as to be slidable in the front-rear direction. The rear ends projecting on the back side of the front plate in the both rear side saddles are connected by operating pieces facing in the left-right direction, and the left and right central portions on the back side of the front plate are A rear piece having an upward engaging portion that engages with and disengages from an engaged portion provided on a lower surface of the front end facing the upper end portion of the drawer in the housing; and a downward piece continuously provided on the front end portion. The latch is provided so as to be pivotable about a pivot axis facing in the left-right direction so that the lower end portion of the downward piece faces the front surface of the central portion in the left-right direction of the operating piece, and the engaging portion is the engaged portion The direction in which the lower piece always engages with the front surface of the operating piece. Latch device of the drawer, characterized in that a biasing means for biasing.   The drawer latch device according to claim 1, wherein a guide member having a backward U-shape in a side view for guiding the operating piece so as to be slidable back and forth is provided on both left and right sides of the latch on the rear surface of the front plate.   The drawer latch device according to claim 1 or 2, wherein a holding member that slidably holds the left and right rearward saddles is fitted to the front plate so that the front end portion protrudes forward of the front plate.   The latch includes a base member fixed to the back surface of the front plate, and a continuous base portion of the rear piece and the downward piece is pivotally attached to the back surface side of the base member with a pivot shaft facing in the left-right direction, and A torsion spring as an urging means is assembled to the pivot so as to urge in a direction in which the engaging portion engages with the engaged portion and a direction in which the downward piece always contacts the front surface of the operating piece. The drawer latch device according to any one of claims 1 to 3.   5. The drawer latch device according to claim 4, wherein a recessed portion that is recessed forward is provided in a mounting portion of the latch on the rear surface of the front plate, and a base member is fixed to the rear surface in the recessed portion.

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