JP3526329B2 - Drawer latch 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 structure for mounting a drawer latch device which pulls a latch lever facing a drawer opening of a drawer front plate to release the latching of the latch piece.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model Publication No. 5-32606.
As disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, there is widely known a cabinet or the like in which a latch device for locking the drawer at a storage position is mounted between a front plate and a back plate of the drawer. This type of latch device includes a lever shaft laterally provided between a front plate and a back plate of a drawer, a latch lever fixedly mounted on the lever shaft to face a pull opening of the front plate, and a side edge of the drawer. Has a latch shaft vertically provided between the front plate and the back plate, and a latch piece fixed to the latch shaft and hooked by a stopper provided on the inner side surface of the cabinet body. The latch is configured to be disengaged from the stopper when the latch lever is pulled to rotate the lever shaft, and the latch shaft rotates in conjunction with the lever shaft.

[0003]

In the conventional drawer latch device described above, a bearing plate for rotatably supporting the lever shaft about its axis is fixed to the front face of the back plate by spot welding or the like. Therefore, the number of parts and the number of man-hours for assembling work are large, which causes a rise in manufacturing cost. In addition, holes, upward grooves, downward grooves, etc. are formed in each of the plurality of bearing plates so that the lever shaft can be mounted and held on the bearing plate that is fixed to the back plate in advance. Since it is necessary to bend the lever shaft in order to engage with the hole, the upward groove, the downward groove, etc. of the bearing plate, labor is required for the mounting work, and the lever shaft may be deformed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a drawer latch device that can reduce the number of parts and the number of assembling work steps and that facilitates the assembling work.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a lever shaft provided laterally between a front plate and a back plate of a drawer, and a lever shaft fixed to the lever shaft. And a latch lever facing the opening of the pull tab of the front plate.When the latch lever is pulled and the lever shaft is rotated, the latch lever is configured to be disengaged from the stopper. A tubular part having a shaft hole to be fitted therethrough and an engaging piece projecting from the upper part of the tubular part; A rear support portion for supporting the tubular portion by abutting on the lower surface rear side portion of the tubular portion is integrally formed with the back plate, and the front plate abuts on the lower surface front portion of the tubular portion to form the tubular portion. The front supporting portion for supporting is integrally formed with the front plate, and when the front plate and the back plate are joined, the engaging piece of the latch lever is The tubular portion of the latch lever is rotatably supported and positioned around the axis of the lever shaft by the locking portion of the back plate that stops, the rear support portion of the back plate, and the front support portion of the front plate. And

According to a second aspect of the present invention, in the drawer latch device according to the first aspect, the upper rear end portion of the back plate is bent substantially at right angles to the upper surface and the back surface of the back plate, respectively, and has a substantially L-shaped cross section. The bent portion is formed, and the engaging portion of the latch lever is formed by forming holes in the bottom surface and the vertical surface of the bent portion that engage with the engaging pieces, respectively. Is an upper projecting part projecting upward from the tubular part and a front projecting part projecting forward from the upper end of the upper projecting part. The upper projecting part and the front projecting part of the engaging piece are bent parts of the back plate. It is characterized in that it is engaged with holes formed in the bottom surface portion and the vertical surface portion, respectively.

According to a third aspect of the present invention, in the drawer latch device according to the first aspect, the rear support portion of the back plate is formed by partially cutting and raising the back plate or press-extruding the back plate.
It is characterized in that the front support portion of the front plate is formed by partially cutting and raising the front plate or extruding by press.

According to a fourth aspect of the present invention, in the drawer latch device according to the first aspect, the front support forming portion of the front plate and the locking portion of the back plate extend from the upper part of the front surface of the front plate to the upper end of the back plate. It is characterized by wearing a makeup edge that covers the.

[0009]

In the drawer latch device according to the first aspect of the present invention, when the front plate and the back plate are not joined to each other, the front side of the back plate is open, so that the lever shaft is deformed such as bent. The engaging piece of the latch lever can be easily locked to the locking part from the front of the back plate and below the locking part without the need for a two-point support between this locking part and the rear support part of the back plate. can do. Then, after that, by joining the front plate and the back plate, the latch lever is engaged by the locking portion of the back plate that locks the engaging piece of the latch lever, the rear support portion of the back plate, and the front support portion of the front plate. It is possible to support and position the tubular portion of the above-mentioned cylindrical portion so as to be rotatable about the axis of the lever shaft. Further, since the locking portion and the rear support portion are formed integrally with the back plate and the front support portion is formed integrally with the front plate, the number of parts and the number of parts assembling steps can be reduced.

In the drawer latch device according to the second aspect of the present invention, the locking portion integrated with the back plate for locking the engaging piece can be easily formed by bending and punching the back plate.

In the drawer latch device according to the third aspect of the present invention, the rear support part integrated with the back plate and the front support part integrated with the front plate can be easily formed.

In a drawer latch device according to a fourth aspect of the present invention, the front support portion forming portion of the front plate and the locking portion of the back plate are formed by a decorative edge mounted from the upper part of the front surface of the front plate to the upper end of the back plate. As it is covered, the beauty of the drawer is improved.

[0013]

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

1 to 4 show an embodiment in which the present invention is applied to a drawer of a cabinet. FIG. 1 is a perspective view of the cabinet, FIG. 2 is a vertical sectional view of a main part of the drawer, FIG. 3 is an exploded perspective view of a main part of the drawer, and FIG. 4 is a perspective view of the main part showing a mounting structure of the latch lever. Referring to these figures, a cabinet main body 1 having an open front surface accommodates drawers 2 in four stages vertically so that drawers 4 are formed in a front plate 3 of each drawer 2. The drawer latch device includes a lever shaft 6 provided between the front plate 3 and the back plate 5 of the drawer 2 and the lever shaft 6.
And a latch lever 7 fixed to the front plate 3 and facing the pull tab opening 4 of the front plate 3. When this latch lever 7 is pulled toward the front to rotate the lever shaft 6 in the direction of arrow A in FIG. 3, the latch shaft 8 which is vertically provided at the side end of the drawer 2 interlocks with the lever shaft 6 and moves in the direction of arrow B. Then, the latch 9 provided on the latch shaft 8 is disengaged from the stopper (not shown) provided on the cabinet body 1 so that the drawer 2 can be freely taken in and out.

In such a latch device, the latch lever 7 is integrally provided with a cylindrical portion 10 having a shaft hole 10a which fits with the lever shaft 6 formed therethrough, and upper portions of both ends of the cylindrical portion 10. Engaging pieces 11 are respectively provided so as to project. The engagement piece 11 is composed of an upper protruding portion 11a protruding upward from the tubular portion 10 and a front protruding portion 11b protruding forward from an upper end of the upper protruding portion 11a. Engagement piece 1 on back plate 5
A locking portion 12 for locking 1 is integrally provided. In this embodiment, a bent portion 12a having a substantially L-shaped cross section is formed at the upper rear end portion of the back plate 5 and is bent substantially at right angles to the upper surface and the back surface of the back plate 5, and the bottom surface of the bent portion 12a is formed. The engaging portion 12 is formed by forming holes 12b and 12c that engage with the upper protruding portion 11a and the front protruding portion 11b of the engaging piece 11 in the portion and the vertical surface portion, respectively. Furthermore, the back plate 5
A rear support portion 13 for supporting the tubular portion 10 by contacting the lower rear side peripheral surface portions of both ends of the tubular portion 10 is integrally formed by partially cutting and raising the back plate 5 or press-extruding. The front plate 3 is integrally formed with front support portions 14 that abut on lower front peripheral portions of both ends of the cylindrical portion 10 to support the cylindrical portion 10 by partially cutting and raising the front plate 3 or extruding by press. Has been done.

Therefore, in this embodiment, when the front plate 3 and the back plate 5 are joined, the engaging piece 11 of the latch lever 7 is formed.
Locking part 12 of the back plate 5 and the rear support part 13 of the back plate 5
The tubular portion 10 of the latch lever 7 is rotatably supported and positioned by the front support portion 14 of the front plate 3 about the axis of the lever shaft 6.

As can be seen from FIGS. 2 to 4, in this embodiment, the lower front side peripheral surface portions at both ends of the tubular portion 10 of the latch lever 7 are constituted by flange-shaped projecting portions 15 having a fan-shaped cross section. The front support portion 14 is in contact with the outer peripheral surface of the protruding portion 15. The portion of the tubular portion 10 excluding the protruding portion 15 is formed of a cylindrical body having an outer diameter smaller than the distance between the back surface of the front plate 3 and the front surface of the back plate 5. The protruding portion 15 of the tubular portion 10 may extend over the entire length of the tubular portion 10, but as in the illustrated embodiment, a part of the entire length section of the tubular portion 10, for example, the tubular portion 10.
If the flanges are formed only on both ends of the latch lever 7,
Can be made lighter.

Further, in this embodiment, a decorative edge made of plastic covering the front support portion forming portion of the front plate 3 and the bent portion 12 of the back plate 5 from the upper part of the front surface of the front plate 3 to the upper end of the back plate 5. 16 is attached.

In the drawer latch device having the above structure, the front side of the back plate 6 is open when the front plate 3 and the back plate 5 are not joined, so that the lever shaft 6
The engaging piece 11 of the latch lever 7 can be easily engaged with the engaging portion 12 from the front side of the back plate 5 and the lower side of the engaging portion 12 without causing deformation such as bending of the engaging portion. 12
The rear support 13 of the back plate 5 can support two points. Then, after that, the front plate 3 and the back plate 5 are joined to each other, so that the locking portion 12 of the back plate 5 that locks the engaging piece 11 of the latch lever 7, the rear support portion 13 of the back plate 5, and the front plate. The cylindrical portion 10 of the latch lever 7 can be rotatably supported around the axis of the lever shaft 6 at three points with the front support portion 14 of the third position. Further, since the locking portion 12 and the rear support portion 13 are formed integrally with the back plate 5 and the front support portion 14 is formed integrally with the front plate 3, the number of parts and the number of parts assembling steps can be reduced. You can

Further, since the front support portion forming portion of the front plate 3 and the bent portion 12a of the back plate 5 are dented, if they are exposed to the outside, the aesthetic feeling is deteriorated. Since the decorative edge 16 attached from the upper part to the upper end of the back plate 5 covers the front support portion forming portion of the front plate 3 and the bent portion 12a of the back plate 5, the appearance of the drawer 2 can be improved.

FIG. 5 shows another embodiment of the present invention. In this embodiment, an engaging portion 12 for engaging the engaging piece 11 of the latch lever 7 is formed by cutting and raising a part of the upper surface of the back plate 5 downward.
2 is a hole 12 that engages with the front protruding portion 11b of the engaging piece 11.
d is provided. Further, the decorative portion 16 has a locking portion 12
An engaging piece 16a is formed integrally with the opening formed on the upper surface of the back plate 5 by cutting and raising. Other configurations are the same as those in the above embodiment.

In the case of this embodiment, since the locking portion 12 is formed by cutting and raising a part of the back plate 5, the back plate 5 can be processed more easily.

Although the embodiments shown in the drawings have been described above, the present invention is not limited to the embodiments described above,
For example, the number of engaging pieces, the rear support portion, the front support portion, and the like, the formation location, and the like can be changed. Further, the present invention can be applied to, for example, a drawer of a desk other than the cabinet.

[0024]

As is apparent from the above description, according to the present invention, it is possible to reduce the number of parts and the man-hours for assembling work, and to provide a latch device for pulling out the assembling work easily. You can

[Brief description of drawings]

FIG. 1 is a perspective view of a cabinet showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a main part of the drawer of the embodiment shown in FIG.

FIG. 3 is an exploded perspective view of a main part of the drawer of the embodiment shown in FIG.

FIG. 4 is a perspective view of a main part showing a latch lever mounting structure of the embodiment of FIG.

FIG. 5 is a vertical cross-sectional view of a main part of a drawer showing another embodiment of the present invention.

[Explanation of symbols]

2 drawers 3 Front plate 4 Puller opening 5 Back plate 6 lever shaft 7 Latch lever 10 tubular part 11 engagement piece 11a upward protrusion 11b front protrusion 12 Locking part 12b, 12c holes 13 Rear support 14 Front support 15 Projection 16 Makeup edge

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 65/44-65/46 A47B 88/00

Claims (4)

(57) [Claims] 1. A lever shaft provided laterally between a front plate and a back plate of a drawer, and a latch lever fixedly mounted on the lever shaft and facing a pull opening of the front plate. In a drawer latch device configured such that a latch is disengaged from a stopper when a lever shaft is rotated, a tubular portion formed by penetrating a shaft hole through which the latch lever fits with the lever shaft, and an upper portion of the tubular portion. And a rear support portion for supporting the tubular portion by abutting a rear portion of the lower surface of the tubular portion on the back plate. Is integrally formed with the back plate, and the front plate is integrally formed with the front plate so as to contact the lower surface front side portion of the cylindrical part to support the cylindrical part. When joined with, the latching part of the back plate that locks the engagement piece of the latch lever A drawer latch device, wherein a cylindrical portion of a lever is supported and positioned so as to be rotatable about an axis of a lever shaft. 2. A bent portion having a substantially L-shaped cross section, which is bent substantially at right angles to an upper surface and a back surface of the back plate, is formed at an upper rear end portion of the back plate, and a vertical portion of the bent portion and a bottom part thereof. The engaging portion of the latch lever is formed by forming holes that engage with the engaging pieces on the surface portion, respectively, and the engaging pieces of the latch lever have an upward projecting portion projecting upward from the cylindrical portion and an upward projecting portion. A front protrusion that protrudes forward from the upper end of the portion, and the upper protrusion and the front protrusion of the engagement piece are engaged with holes formed in the bottom face and the vertical face of the bent portion of the back plate, respectively. The drawer latch device according to claim 1, wherein: 3. The front support of the front plate, wherein the rear supporting portion of the back plate is formed by partially cutting and raising the back plate or by press-extruding.
2. The drawer latch device according to claim 1, wherein the holding portion is formed by partially cutting and raising the front plate or press-extruding the front plate. 4. A decorative edge is attached from the upper part of the front surface of the front plate to the upper end of the back plate so as to cover the front support portion forming portion of the front plate and the locking portion of the back plate. Drawer latch device.