JP6407008B2 - Latch device - Google Patents

Description

  The present invention relates to a latch device used for drawer of office furniture such as an office desk.

  Conventionally, there has been disclosed a latch device that is attached to a drawer so that a drawer of furniture such as an office desk is not unintentionally pulled out due to a large vibration such as an earthquake. For example, a drawer latch device disclosed in Patent Document 1 includes a front decorative plate whose lower end is swing-operated in the front-rear direction, an operation piece that comes into contact with the front decorative plate, and a latch shaft around the operation piece. The latch main body having a latch piece integrally formed with the operation piece by 90 degrees is provided on the left and right sides of the drawer with the latch shaft supported in the vertical direction.

  A claw piece is formed on the latch piece. This claw piece is locked in a latch hole opened in the inner side surface of the desk body facing the drawer side surface. The latch shaft of the latch main body is supported in the vertical direction by a latch shaft holding portion formed on a latch fixture attached from the left and right outer sides of the front part of the drawer, and is rotatable. The latch body is urged in a direction in which the claw piece and the latch hole are locked by an integrally formed spring piece. In this way, the latch piece is moved in the horizontal direction by the swinging operation of the front decorative board. The latch body is biased by a spring piece in a direction in which the claw piece engages with the latch hole.

Japanese Patent Laid-Open No. 11-164748

  In the latch device according to Patent Document 1, the latch piece operates in the horizontal direction, and the latch claw is engaged with and disengaged from the latch hole. Therefore, since the operation piece and the latch piece are shifted by 90 degrees around the latch axis, the latch body becomes a large member.

  The latch fixture having the latch shaft holding portion for supporting the latch shaft can cover the operation piece of the latch main body and the contact portion of the front decorative plate contacting the operation piece. It is difficult to cover the locking part. If the cover member is formed so as to cover the latching portion between the latch claw and the latch hole, the cover member protrudes in the horizontal direction, and the latch device and the drawer are enlarged.

  In addition, when the latching portion of the latch claw and the latch hole is not covered, if the dust or something in the desk enters the latching hole, the latch device does not operate normally. There is a case. Further, when the drawer is pulled, the peripheral portion of the latch claw appears outside, so that it is difficult to say that it looks good.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a latch device that realizes a reduction in size and reduces malfunction due to intrusion of dust or the like and has a good appearance.

  The latch device according to the present invention includes a tray body having a bottom surface portion, a left side surface portion, a right side surface portion, a front surface portion, and a rear surface portion each formed in a plate shape, and each of the left side surface portion and the right side surface portion. Fixed on the furniture side, such as a desk facing the door, with the flat surface facing outward, and the locking portion is formed on the lower end, and provided on the outside of the left side and the right side, respectively. A latch body that is pivotally supported so that the lower part is swung in the front-rear direction, and is formed with a locking part that is engaged with and disengaged from each of the locked parts. A biasing member that biases each of the latch bodies so that the latching portions are locked, and a front portion of the tray body that is provided in front of the front surface, and is pivotable so that the lower end is swung back and forth. Supported by the left and right elongated shape, each said latch at both ends An operating member that engages with a body and swings each of the latch bodies, and a support shaft that pivotally supports the latch body and the operating member are formed, and each latch body is covered from the outside. A cover member.

  The locked portion protrudes downward from the lower end portion of the fixed plate and is formed to be inclined so that the lower portion of the front edge is positioned on the rear side from the upper portion, and the latch body includes the support shaft An inclined portion that is formed to be inclined toward the locked portion, and a hole that extends horizontally rearward from the inclined portion and into which the locked portion is loosely fitted. And a horizontal part provided with a part.

  The operation member is configured such that a front plate portion and a rear plate portion are connected to each other at an upper end portion through an arc-shaped portion in a longitudinal sectional view, and a lower end portion of the front plate portion is forward in the longitudinal sectional view. It is bent horizontally toward the end, and is formed by bending the edge toward the bottom in a circular shape when viewed from the longitudinal section. The rear plate portion is engaged with each of the latch bodies at both ends thereof.

  In the latch device according to the present invention, the locked portion at the lower end portion of the fixed plate fixed to the furniture side such as a desk and the locking portion of the latch body that is swung back and forth by the operation member are locked. . Therefore, since the latch body can be made smaller than the latch body that is swung horizontally, the entire latch device, and thus the furniture such as a desk, can be made smaller.

  Also, a latch member is provided on the latch body that swings in the front-rear direction, a latch member is provided on the fixed plate, and a cover member that covers the latch body from the outside is provided. As a result, the locking portion where the locking portion and the locked portion are locked can be easily obscured, so that intrusion of dust and the like can be prevented, malfunctions can be reduced, and appearance is improved. be able to.

  Further, the locked portion protrudes downward from the lower end portion of the fixed plate, and the front edge is inclined. And the hole used as a latching | locking part was formed in the horizontal part of a latch main body. Therefore, when pulling out the drawer, the horizontal part of the latch main body is moved forward and downward by the operating member to release the lock, and when pulling out, the tip of the horizontal part is brought to the front edge where the locked part is inclined. Abutting and moving downward along this front side edge to lock the locking portion and the locked portion, the locking portion and the locked portion can be automatically locked.

  Further, the operation member is formed by connecting the front side plate portion and the rear side plate portion at the upper end portion via an arcuate portion. And the lower end part of each of a front side board part and a rear side board part is bend | folded by the longitudinal cross-sectional view circular arc shape. Therefore, the operation of the operation member can be operated by putting a finger between the front plate portion and the rear plate portion, and it is comfortable to touch due to the circular shape in the longitudinal section of the other end portion of the front plate portion and the rear plate portion. The operation member can be operated. Further, since both ends of the rear plate are engaged with the latch body, the structure can easily form a mechanism for transmitting the swing motion from the operation member to the latch body, and the swing operation of the left and right latch bodies can be performed. No phase shift occurs. Therefore, the latch device can be operated reliably.

It is a perspective view which shows the desk provided with the latch apparatus which concerns on embodiment of this invention, (a) shows the state by which drawer was pulled out, (b) shows the state by which drawer was pulled out. It is a perspective view of a drawer provided with a latch device concerning an embodiment of the present invention. It is a principal part expansion disassembled perspective view of a drawer provided with the latch apparatus which concerns on embodiment of this invention. It is a principal part expansion perspective view of the latch apparatus which concerns on embodiment of this invention. It is the left view which showed the state which the latch apparatus which concerns on embodiment of this invention is engaging, and abbreviate | omitted the left cover member. It is the left view which showed the state by which the latch apparatus which concerns on embodiment of this invention was disengaged, and abbreviate | omitted the left cover member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The latch devices 30A and 30B according to the present invention are attached to the office desk 1 shown in FIGS. 1A and 1B, and the drawers 100 and 200 are unintentionally pulled out in the event of an earthquake or the like. It is something to prevent. In the following description, the side of the office desk 1 on which the person sits is assumed to be the front, the opposite side is assumed to be the rear, the left hand side when the person is sitting is left, and the right hand side is assumed to be right.

  The left latch device 30A is provided on the left side of the drawer 100, and the right latch device 30B is provided on the right side of the drawer 100. Similarly, latch devices 30 </ b> A and 30 </ b> B are provided on the left and right sides of the drawer 200, which has a narrower width than the drawer 100.

  FIG. 2 is a perspective view of the drawer 100 and the tray rail 2 as viewed from the upper front upper left. The tray rail 2 is fixed to the office desk 1 shown in FIG. The tray rail 2 is provided at two places on the left and right sides, and includes a horizontal plate 2a and an outer vertical plate 2b, respectively. From the lower end of each vertical plate 2b, a rear roller rail 2b1 for guiding a later-described rear roller 16 is formed in a concave groove shape. A front roller 3 is disposed at the front end of each of the left and right vertical plates 2b, together with a fixed plate 40, which will be described later.

  The tray body 18 of the drawer 100 includes a bottom surface portion 11, a rear surface portion 12, a left side surface portion 13, a right side surface portion 14, and a front surface portion 15. In the present embodiment, the bottom surface portion 11, the rear surface portion 12, and the front surface portion 15 are integrally formed from one sheet metal material by press molding. The front surface portion 15 has an arcuate bulging portion 15a that rises upward from the front end of the bottom surface portion 11, a flat portion 15b that extends forward from the front end of the bulging portion 15a, and a front portion that is inclined upward from the flat portion 15b. It consists of the inclined part 15c (refer FIG. 3). By forming the bulging portion 15a and the flat portion 15b on the front surface portion 15, when the drawer 100 is used, it moves to the back of the tray body 18 even if a writing instrument or the like is placed on the flat portion 15b. There is no.

  The rear surface portion 12 is formed with a horizontal plate 12b in which the upper end of a vertically raised vertical plate 12a is bent forward. Thereby, it is reduced that the thing stored in the tray main body 18 falls from the rear side of the tray main body 18.

  The left side surface portion 13 and the right side surface portion 14 include horizontal plates 13a and 14a that are long in the front and rear directions so that a part of the left side surface portion 13 and the right side surface portion 14 can be seen rearward on the right side. The horizontal plates 13 a and 14 a have rear ends positioned rearward of the rear surface portion 12, and the front ends extend to the vicinity of the front end of the bottom surface portion 11, although not shown. The horizontal plates 13a and 14a are joined to the lower surface of the bottom surface portion 11 by spot welding or caulking.

  Further, the left side surface portion 13 and the right side surface portion 14 rise from the outer ends of the horizontal plates 13a and 14a, and the rear ends are the same as the horizontal plates 13a and 14a, and the front ends are vertical plates 13b and 14b extending to the front surface portion 15. Prepare. In this way, the left side surface portion 13 and the right side surface portion 14 are formed of the horizontal plates 13a and 14a and the vertical plates 13b and 14b. Rear rollers 16 are provided on the outer sides of the rear ends of the vertical plates 13b and 14b, respectively, with their rotation axes directed in the left-right direction.

  The left side surface portion 13 and the right side surface portion 14 are respectively formed with concave roller-shaped front roller rails 13b1 and 14b1 whose upper ends are bent downward by bending the upper ends of the vertical plates 13b and 14b outward. The front roller rails 13b1 and 14b1 are supported by the front roller 3 and move on the front roller 3.

  As shown in FIGS. 3 and 4, the upper end of the inclined portion 15c in the front surface portion 15 of the tray main body 18 is formed with a bent portion 15c1 having a U-shaped longitudinal section that is opened downward. On the other hand, the tray front plate 20 attached to the front side of the front surface portion 15 is formed with an attachment portion 20b having a shape following the outer shape of the bent portion 15c1 at the upper end of the decorative plate surface 20a provided with a large number of lateral grooves. . The tray front plate 20 is attached to the front surface portion 15 of the tray body 18 with the attachment portion 20b attached to the bent portion 15c1.

  A latch lever guide portion 20c having a semicircular arc shape in a longitudinal sectional view that follows the outer shape of an arc-shaped portion 21b of a latch lever 21 described later is formed below the attachment portion 20b of the tray front plate 20. By this latch lever guide portion 20c, the swinging motion of the latch lever 21 is guided. Further, a circular attachment hole portion 20d is formed on the lower side of the base portion of the latch lever guide portion 20c.

  A latch lever 21 serving as an operation member is provided in front of the front surface portion 15 of the tray body 18. The latch lever 21 is formed in a long shape that is long on the left and right. 3, the latch lever 21 is formed by connecting a front plate portion 21a and a rear plate portion 21c via arcuate portions 21b at respective upper ends in a longitudinal sectional view.

  A lower end portion of the front plate portion 21a is bent horizontally in the longitudinal sectional view toward the front side, and a front edge portion 21a1 is formed in which the front end is bent in a circular shape in the longitudinal sectional view with the end edge directed downward. . Similarly, a lower edge portion of the rear side plate portion 21c is also formed with a rear edge portion 21c1 that is bent in a circular shape in a longitudinal sectional view toward the front side. Further, the rear plate portion 21c is formed with a protruding engagement portion 21c2 that is formed to protrude from both ends thereof.

  Latch bodies 31 are provided outside the left side surface portion 13 and the right side surface portion 14 of the tray body 18. Each latch body 31 is formed by an inclined portion 31a that extends obliquely toward the rear lower side and a horizontal portion 31b that extends horizontally from the lower end of the inclined portion 31a toward the rear. A shaft hole 31a1 is provided in the inclined portion 31a. A hole 31b1 having a rectangular shape in a top view is opened in the horizontal portion 31b. Further, a swing guide portion 31b2 is formed on the front inner edge of the hole portion 31b1 and at a substantially intermediate position in the front-rear direction of the horizontal portion 31b.

  Also, cover members 33 are provided outside the left and right latch bodies 31, respectively. Each cover member 33 is provided with an outer surface plate 33f constituting an outer surface. The outer surface plate 33f is connected to the side surface plate serving as the outer surface, the upper surface plate, the decorative surface plate that is connected to the front edge of the upper surface plate and is provided with a large number of lateral grooves, and the lower edge of the decorative surface plate. A stepped lower surface plate, an inclined plate connected to the stepped lower surface plate, and a lower surface plate connected to the inclined plate.

  Each cover member 33 faces the inner side (in other words, the latch main body 31 side) with respect to the side plate of the outer surface plate 33f and has an interval S (see the right cover member 33 in FIG. 3). A base plate 33d1 is provided. Each cover member 33 is formed so as to cover the inclined portion 31a including the shaft hole 31a1 and the horizontal portion 31b including the hole portion 31b1 in the left and right latch bodies 31 respectively.

  In each cover member 33, a support shaft 33a is erected inward from the inner surface of the side plate of the outer surface plate 33f. The support shaft 33a is inserted inside the shaft hole 31a1 and the arcuate portion 21b of the latch lever 21, and pivotally supports both the latch body 31 and the latch lever 21 together.

  And between each cover member 33 and each latch main body 31, the torsion coil spring 32 which is an urging member which urges | biases each latch main body 31 back is provided. Of the arm portions 32 a and 32 b of the torsion coil spring 32, one arm portion 32 a is held by a spring holding portion 33 b provided on the inner surface of each cover member 33. The spring holding portion 33b is formed by two flat plates standing from the inner surface of the cover member 33, and the arm portion 32a is held between the two flat plates. The other arm portion 32b of the torsion coil spring 32 abuts on the front surface of the inclined portion 31a of the latch body 31 (see FIG. 4).

  In addition, the protrusions 33 c that are provided upright on the inner surface of the side plate of each cover member 33 are fitted into the mounting hole 20 d of the tray front plate 20. Similarly, the projection 33d standing on the inner surface of the side plate of the outer surface plate 33f of each cover member 33 is fitted into holes 13c and 14c opened near the front end portions of the left side surface portion 13 and the right side surface portion 14. Then, the screw members 13d and 14d are screwed into the screw holes 33e provided in the inner surface of the side plate of the outer surface plate 33f of each cover member 33 through the holes above the front end portions of the left side surface portion 13 and the right side surface portion 14.

  And each cover member 33 is attached so that the horizontal part 31b of the latch main body 31 may be located in the space | interval S formed between the base plate 33d1 of the protrusion 33d of each cover member 33, and the outer surface board 33f (FIG. 4). In this way, each cover member 33 is fixed relative to the tray body 18 from the outside of each latch body 31. Accordingly, the swing guide portion 31b2 of the latch body 31 is positioned outside the base plate 33d1 of the cover member 33 (see FIG. 4). That is, the swing guide part 31b2 approaches or slides on the base plate 33d1 and guides the swinging motion around the support shaft 33a of the latch body 31.

  The fixing plate 40 is fixed to the front end of the vertical plate 2b of each tray rail 2 provided on the office desk 1 side facing the left side surface portion 13 and the right side surface portion 14 so that the flat surface 40a faces outward. The lower end portion of the fixed plate 40 is bent horizontally toward the inside, and a protruding portion 40b protruding downward is formed at the end portion (see FIGS. 5 and 6). The protruding portion 40b is inclined so that the lower side of the front side edge of the protruding portion 40b is located on the rear side of the upper side. The lower edge of the protrusion 40b is connected to the front edge to form a horizontal lower edge, and the rear end of the lower edge is connected to the rear edge extending vertically upward. The protrusion 40 b is loosely fitted in the hole 31 b 1 of the latch body 31. Here, the protrusion 40b is a locked portion in the latch devices 30A and 30B, the hole 31b1 is a locking portion, and both are formed to be detachable.

  In the latch devices 30A and 30B formed in this manner, the left cover member 33 is omitted and the torsion coil spring 32 shows only the arm portions 32a and 32b when the drawer 100 is stored in the office desk 1. As shown in FIG. 5, which is a side view, the protrusion 40b is loosely fitted in the hole 31b1, and the latch devices 30A and 30B are engaged. At this time, the latch main body 31 is urged backward (in other words, clockwise in FIG. 5) by the torsion coil spring 32 which is an urging member. The latch body 31 is restricted from rotating by contacting the inclined front side edge of the protrusion 40b and the front edge of the hole 31b1. The overhanging engagement portions 21 c 2 at both ends of the latch lever 21 abut on the upper side of the inclined portion 31 a of each latch body 31. Thus, the latch lever 21 is engaged with each latch body 31 at both ends thereof.

  Therefore, in the engaged state of the latch devices 30A and 30B shown in FIG. 5, even if a vibration such as an earthquake occurs in the office desk 1, the latch devices 30A and 30B are in the engaged state. The drawer 100 is not pulled out.

  Next, when pulling out the drawer 100, the left side cover member 33 and the main body of the torsion coil spring 32 are omitted as shown in FIG. A finger is inserted on the rear side, the latch lever 21 is pulled forward, and the latch lever 21 is rotated forward and upward (in other words, counterclockwise in FIG. 6) around the support shaft 33a. Then, the latch main body 31 rotates about the support shaft 33a toward the front lower side against the urging force of the torsion coil spring 32 via the overhanging engagement portions 21c2 at both ends of the latch lever 21. At this time, the left and right latch bodies 31 are rotated by the left and right long latch levers 21 without phase shift.

  When the latch main body 31 is rotated, the protrusion 40b that is the engaged portion is released from the hole 31b1 that is the engaging portion, and the engaged state is released. The latch body 31 is rotated forward and downward until the lower surface of the tip of the horizontal portion 31b contacts the inner surface of the lower plate of the cover member 33 provided to face the lower surface of the horizontal portion 31b. Is done.

  In this way, when the latch devices 30A and 30B are disengaged, the drawer 100 can be pulled out from the office desk 1. At this time, the front roller rails 13 b 1 and 14 b 1 of the left side surface portion 13 and the right side surface portion 14 move on each front roller 3. Each rear roller 16 rolls on each rear roller rail 2 b 1 and advances together with the tray body 18.

  When the drawer 100 is closed, if the drawer 100 is pushed in as it is, the tip of the horizontal portion 31b of the latch body 31 abuts on the inclined front edge of the protrusion 40b, so that the horizontal portion 31b of the latch body 31 is It moves downward following the inclination of the front edge of the protrusion 40b. When the drawer 100 is further pushed in, the protrusion 40b is loosely fitted into the hole 31b1, and the engaged state shown in FIG. 5 is obtained.

  In the latch devices 30A and 30B according to the present embodiment described above, the left and right latch bodies 31, the cover member 33, and the fixing plate 40 are symmetrical parts. Also, the latch devices 30A and 30B can be attached to the narrow drawer 200 (see FIG. 1) simply by changing the lengths of the tray front plate 20 and the latch lever 21 in the left-right direction.

  Furthermore, even when the tray body 18 is a drawer having a deeper depth, the latch devices 30A and 30B according to the present invention can be attached. Therefore, even in the case of furniture such as an office desk to which drawers having different widths and depths are attached, it is possible to share the parts constituting the latch device.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to this embodiment, A various change can be implemented. For example, the protrusion 40b of the fixed plate 40 that is the locked portion is changed, and a hole is formed in the horizontal portion bent inward from the fixed plate 40 to form the locked portion. On the other hand, the hole 31b1 of the horizontal portion 31b of the latch main body 31 serving as a locking portion forms a locking portion as a claw-like protrusion. Thus, it is good also as a structure which reversed the relationship of the hole and protrusion about the to-be-latched part and the latching | locking part in this embodiment. In addition, the torsion coil spring 32 according to the present embodiment can use another form of spring such as a coil spring or an elastic body such as rubber as another biasing member.

DESCRIPTION OF SYMBOLS 1 Office desk 2 Tray rail 2a Horizontal plate 2b Vertical plate 2b1 Rear roller rail 3 Front roller 11 Bottom surface portion 12 Rear surface portion 12a Vertical plate 12b Horizontal plate 13 Left side surface portion 13a Horizontal plate 13b Vertical plate 13b1 Front roller rail 13c Hole 13d Screw member 14 right side surface portion 14a horizontal plate 14b vertical plate 14b1 front roller rail 14c hole 14d screw member 15 front surface portion 15a bulging portion 15b flat portion 15c inclined portion 15c1 bent portion 16 rear roller 18 tray main body 20 tray front plate 20a decorative plate surface 20b Attached portion 20c Latch lever guide portion 20d Mounting hole portion 21 Latch lever 21a Front side plate portion 21a1 Front edge portion 21b Arc-shaped portion 21c Rear side plate portion 21c1 Rear edge portion 21c2 Overhang engaging portion 30A Latch device 30B Latch device 31 Latch body 31a inclined part 31a1 shaft hole 31b Horizontal portion 31b1 Hole portion 31b2 Swing guide portion 32 Torsion coil spring 32a Arm portion 32b Arm portion 33 Cover member 33a Support shaft 33b Spring holding portion 33c Projection 33d Projection 33d1 Base plate 33e Screw hole 33f Outer plate 40 Fixing plate 40a Flat surface 40b Projection part 100 Drawer 200 Drawer

Claims (3)

A tray body having a bottom surface portion, a left side surface portion, a right side surface portion, a front surface portion, and a rear surface portion each formed in a plate shape,
A fixing plate that is fixed to a furniture side such as a desk facing each of the left side surface part and the right side surface part so that a flat surface faces outward, and a locked part is formed at a lower end part;
A latch that is provided outside each of the left side surface portion and the right side surface portion, is rotatably supported so that the lower portion is swung in the front-rear direction, and a latch portion that is engaged with and disengaged from each of the locked portions is formed. The body,
A biasing member that biases each of the latch bodies so that each of the locking portions is locked to each of the locked portions;
Provided in front of the front surface portion of the tray body, is rotatably supported so that the lower end is swung in the front-rear direction, is formed in an elongated shape on the left and right sides, and engages with each latch body at both ends. An operating member for swinging the latch body;
A support shaft that pivotally supports the latch body and the operation member is formed, and a cover member that covers each latch body from the outside,
A latch device comprising: The locked portion protrudes downward from the lower end portion of the fixed plate, and is formed so as to be inclined so that the lower side of the front side edge is positioned on the rear side of the upper side,
The latch body includes a shaft hole that is pivotally supported by the support shaft and is inclined toward the locked portion, and extends horizontally rearward from the inclined portion so as to be engaged. The latch device according to claim 1, comprising a horizontal portion provided with a hole portion into which the stop portion is loosely fitted. The operation member is formed by connecting the front side plate portion and the rear side plate portion via an arc-shaped portion at the upper end of each in a longitudinal sectional view,
The lower end portion of the front side plate portion is formed by being bent horizontally toward the front in a longitudinal sectional view, and bent in a circular shape in the longitudinal sectional view with the edge facing downward,
The lower end portion of the rear side plate portion is formed by bending in a circular shape in a longitudinal sectional view toward the front side,
3. The latch device according to claim 1, wherein the rear side plate portion is engaged with each of the latch bodies at both end portions thereof. 4.

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