JP2007135835A - Latch device of drawer in cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch device of a drawer in a cabinet preventing the unlatching of a latch even if lifting it with the drawer closed. <P>SOLUTION: This latch device of the drawer in the cabinet is provided with a locking projection 122, which elastically energizes a latch plate 33 horizontally extended from a latch body rotationally supported to the drawer around a vertical shaft, toward the inside face of a cabinet body with the drawer closed and is formed with a lower face upward inclined as its being separated from the inside face, in the inside face; is latched by locking a locking part 33a provided on the latch plate 33 to the locking projection 122; and is unlatched by being interlocked with an operation of pulling a pull of the drawer. The latch plate 33 is so formed that the front side of the locking part 33a is defined as a recessed part 33b facing the inside face and the lower part of the recessed part 33b is opened. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drawer latch device in storage furniture such as a wagon or a sleeve cabinet.

  As a latch device for drawers in storage furniture such as conventional wagons or sleeve cabinets, a latch plate extending horizontally from a latch body that can rotate around a vertical axis is placed inside the storage furniture body with the drawer closed. It is configured to be elastically biased toward the side, and the latching hole provided in the latch plate engages with the latching protrusion provided on the inner side of the storage furniture body, for the operation of pulling the drawer puller. Some latches are released in conjunction with each other (for example, see Patent Documents 1 and 2).

Japanese Patent No. 3508529 (FIG. 3-6) Japanese Patent Laid-Open No. 2002-357037 (FIGS. 2, 3, and 7)

  In the storage furniture provided with a drawer, the drawer is supported by guide means comprising a combination of a rail attached to the left and right inner surfaces of the storage furniture body and rollers and sliders that engage with the rail, and can be opened and closed in the front-rear direction. However, in order to smoothly open and close the drawer, the guide means must be provided with clearances in the vertical direction and the horizontal direction. Therefore, due to the presence of the clearance, the drawer can be slightly moved upward and laterally from the position supported by the guide means. Also, since the clearance for absorbing the position error is provided in the locking between the locking hole and the locking protrusion, the presence of the clearance allows the drawer to move slightly in the front-rear direction. It has become.

  The locking projection is configured by attaching a separate resin molded product directly to the side plate on the inner side surface of the storage furniture body or a reinforcing body attached to the side plate, or the side plate or the reinforcing body. It is integrally formed by pressing the press die from the back side of the surface facing the latch plate. Here, when the locking projection is formed by press molding, it is necessary to provide a draft angle of the press mold, and therefore the locking projection formed by the press molding is separated from the inner surface. Accordingly, a lower surface inclined upward is formed. Therefore, due to the presence of the clearance, when the drawer is lifted during transportation of the storage furniture, or when an earthquake occurs, etc., without performing the pulling operation of the drawer with the drawer closed. In addition, when the drawer rises relative to the storage furniture body, the latch plate may rotate in a direction away from the locking projection along the inclined lower surface to release the latch.

  Further, even in a configuration in which the locking protrusion is a separate resin molded product, the inclined lower surface may be formed by a draft angle of a mold for forming the locking protrusion, and the inclined lower surface may be formed during molding. Even if the clearance is not present, if the drawer is closed and moved repeatedly in the left-right direction or the front-rear left-right direction due to the presence of the clearance, the locking protrusion is a resin-molded product and wears, forming the inclined lower surface. May be. Even in such a case, when the drawer is relatively raised with respect to the storage furniture main body with the drawer closed, the latch plate is separated from the locking projection along the inclined lower surface. And the latch may be released.

  The present invention has been made in order to solve the above-described problems, and the drawer is relative to the storage furniture main body without performing the operation of pulling the drawer with the drawer closed. It is an object of the present invention to obtain a drawer latch device for storage furniture in which the latch is not released even when it is raised.

  In order to solve the above problem, the drawer latch device in the storage furniture according to the present invention is provided with a latch plate extending in a horizontal direction from a latch body supported so as to be rotatable about a vertical axis in the drawer. In a closed state, elastically urged toward the inner surface of the storage furniture main body, and provided with a locking projection formed on the lower surface that slopes upward as the distance from the inner surface increases, A latch device for a drawer in a storage furniture in which a latch is engaged when a latching portion provided on the latch plate is latched to a latching projection, and the latch is released in conjunction with an operation of pulling a puller of the drawer. A shape that does not come into contact with the lower surface of the locking projection even when the drawer is raised relative to the storage furniture body in a state where the locking projection and the locking portion are locked. Latch It is intended to be equipped with.

  Here, it is preferable that the latch plate has a recess formed on the front side of the locking portion and facing the inner surface of the storage furniture body, and the lower portion of the recess is opened.

  Further, the locking projection is formed integrally with the inner side plate by pressing the press die from the back side of the surface of the inner side plate of the storage furniture body facing the latch plate. And preferred.

  According to the drawer latch device in the storage furniture according to the present invention, a latch plate extending in a horizontal direction from a latch body supported so as to be rotatable about a vertical axis in the drawer, with the drawer closed, A latching protrusion formed on the inner surface of the storage furniture body is provided with a locking projection formed with a lower surface that is elastically biased toward the inner surface of the storage furniture body and is inclined upward as it is separated from the inner surface. A latch device for a drawer in a storage furniture that is latched by a latching portion provided on a latch plate and is latched in conjunction with an operation of pulling a puller of the drawer. The latch plate is shaped so as not to come into contact with the lower surface of the locking projection even when the drawer is raised relative to the storage furniture body in a state where the locking portion is locked. With , In a state of closing the drawer, to be performed an operation of pulling the pull tab of the drawer, the drawer of the lifting or the like to be said latch plate is not able to rotate. Therefore, the latch will not be released unless the drawer is pulled and the drawer is pulled.

  In addition, when the latch plate is formed with a recess facing the inner surface of the storage furniture main body on the front side of the locking portion, and the lower portion of the recess is opened, the strength and rigidity of the latch plate can be reduced. Since it is easy to ensure, in addition to the above effects, the reliability of the latch device can be improved.

  Further, the locking projection is formed integrally with the inner side plate by pressing the press die from the back side of the surface of the inner side plate of the storage furniture body facing the latch plate. And since the said latching protrusion is integrally formed with the inner surface board of the storage furniture main body, in addition to the said effect, cost reduction can be attained by the reduction of the component cost by the number of parts reduction, and an assembly cost.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and all the embodiments that satisfy the requirements described in the claims are described. Is included. In the present specification, the direction in which the drawer is pulled out (the side in which the drawer is opened) is the front, the opposite side (the direction in which the drawer is closed) is the rear, and the left and right are the left and right.

  FIG. 1 is a longitudinal left side view showing an example in which the drawer latch device in the storage furniture according to the embodiment of the present invention is used in a wagon having two upper and lower drawers as an example of storage furniture. 2 to 4 are explanatory views of the latch device and the pulling device, FIG. 2 is a rear view, FIG. 3 is a left side view, and FIG. 4 is an exploded perspective view. 5 to 7 are explanatory views showing the configuration of the latch plate and the locking protrusion, FIG. 5 is an exploded perspective view, FIG. 6 is an explanatory view of the shape of the locking protrusion, and FIG. FIG. 6B is a longitudinal rear view, and FIG. 7 is a left side view showing the vertical positional relationship between the latch plate and the locking projection. Further, FIG. 8 is a partially longitudinal rear view showing the structure of the latch device, FIG. 9 is an explanatory view of the interlocking operation of the pulling device and the latch device, and FIG. 9 (a) shows the operating state of the latch with the drawer closed. FIG. 9B shows a released state of the latch in which the handle is rotated.

  In FIG. 1, a wagon 101 is supported by guide means 103, 103 comprising a combination of a wagon body 102, a rail attached to the left and right inner surfaces of the wagon body 102, and rollers and sliders engaged with the rail. The upper drawer 104 and the lower drawer 105 can be opened and closed. Further, the wagon body 102 includes a rear plate 106 and left and right side plates 107, 107, a front plate having a substantially U-shape in plan view, an upper collar 108 a and a mounting plate 108 b attached to the front and rear of the side plate. Lower plate 109a and bottom plate 109b attached to the front and back of the side plate, top plate 110 attached to the upper surface of upper plate 108a and attachment plate 108b, and casters 111 attached to the lower surfaces of lower plate 109a and bottom plate 109b, ... and so on. The casters 111,... Facilitate the movement of the wagon 101.

  The upper drawer 104 and the lower drawer 105 are provided with the back cover 2 attached to the rear surface of the front plate 1, a substantially U-shaped body plate 3 that opens upward on the rear side, and the rear plate 3 on the rear side. A plate 4 is attached to form an article accommodating portion. In the wagon 101 provided with such drawers 104, 105, the guide means 103, ... are provided with clearances in the vertical direction and the horizontal direction in order to smoothly open and close the drawers 104, 105 as described above. It has been.

  In a state where the drawers 104 and 105 are closed and accommodated in the wagon body 102, the drawers 104 and 105 are hidden by the top plate 110 and the left and right side plates 107 and 107 in a plan view and a side view. And a resin pulling body 12 and a cover body 13 to be described later can be protected.

  Further, the drawers 104 and 105 are supported by the guide means 103 and 103 as described above and can be opened and closed in the front-rear direction. When the drawers 104 and 105 are closed, the latch device 31 described later is in an operating state. 105 is prevented from opening unexpectedly. When the pulling body 12 is pulled, the latch device 31 is released in conjunction with the operation.

  2 to 4, the front plate 1 is made of a steel plate, the upper portion thereof is bent rearward, and the upper surface thereof avoids interference with the handle body 12 that is supported so as to be rotatable about a left-right axis. Left and right through-holes 22 and 22 extending in the left-right direction are formed, and the cover body support portion 21 is formed by further bending upward, rearward, and downward from the rear bent portion (see FIG. 9).

  The left and right sides of the front plate 1 are continuously bent rearward and inward in the left-right direction so as to be substantially U-shaped in plan view, and on the rear surface side of the left and right bent portions are for mounting the rotary bearings 14, 14. The left and right notches 23 and 23 and the locking holes 25 and 25, and the notches 24 and the locking holes 26 for attaching the latch receiver 36 are formed below the notches 23 and the locking holes 25.

  The left and right rotary bearings 14 and 14 are made of synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS, and the left and right notches 23 and 23 are engaged with the engaging projections 15 and 15 and are slid. The position of the left and right planar U-shaped portions on the back side of the front plate 1 spaced downward from the handle body 12 by locking the locking claws 16, 16 in the locking holes 25, 25. The circular engaging recesses 14a and 14a are attached to face each other. The engaging recesses 14a and 14a may be circular holes.

  Plate members 17 and 17 constituting the rotation shaft are engaged with the engagement recesses 14a and 14a of the rotation bearings 14 and 14 and are slightly shorter than the inner diameters of the engagement recesses 14a and 14a. That is, the engagement recesses 14 a and 14 a of the rotary bearings 14 and 14 are fitted on the plates 17 and 17. The plate bodies 17, 17 are formed integrally with the connection body 18 by extending the lower left and right sides of the connection body 18, which is a processed sheet metal product, outward in the left-right direction.

  According to the configuration of the rotary bearings 14 and 14, the plate bodies 17 and 17 that are the rotary shafts, and the connecting body 18, the rotary shaft and the rotary bearing can be configured with a simple configuration. Cost can be reduced. Further, since the rotary shafts 17 and 17 are made of sheet metal and the rotary bearings 14 and 14 are made of synthetic resin, noise may be generated even if the rotary shaft and the rotary bearing slide by operation of the handle body 12. And quietness can be improved.

  The pulling device 11 includes a pulling body 12 made of a synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon or ABS, which can be rotated around the left-right axis on the upper side of the front plate 1 of the drawers 104 and 105, and the pulling device. A synthetic resin cover body 13 similar to the handle body 12 is provided, which is provided with a superposition portion that closes the gap caused by the rotation of the body 12. The cover body 13 may not be a separate body from the front plate 1 but may be an integral one.

  The pulling body 12 is substantially L-shaped in a side view including a horizontal plate portion 12a extending substantially horizontally in the left-right direction and a vertical plate portion 12b extending substantially vertically from the front end of the horizontal plate portion 12a. . The cover body 13 includes a horizontal cover body 13a extending in the horizontal direction in the horizontal direction on the upper side of the horizontal plate portion 12a of the handle body 12, and the horizontal direction in the vertical direction from the rear end of the horizontal cover body. And a vertical cover body 13b extending substantially in a side view.

  The pulling body 12 is integrally formed with left and right attachment portions 12c, 12c formed by hanging the rear end of the plate-like portion extending rearward, so that the attachment portions 12c, 12c are attached to the front plate 1. In a state where the left and right through holes 22 and 22 are in contact with the rear surface of the connecting body 18, the mounting screws 28 and 28 are passed through the through holes 19 and 19 of the mounting portions 12 c and 12 c to the screw holes 18 a and 18 a of the connecting body 18. By screwing, the handle body 12 is supported so as to be rotatable around the plate bodies 17 and 17 which are rotation shafts at positions spaced downward from the handle body 12.

  Since the cover body 13 is integrally formed with a box-shaped attachment portion 13c having an opening on the lower side at the rear portion thereof, the attachment portion 13c is attached to the cover body support portion 21 of the front plate 1 from above. In the fitted state, the cover body 13 is screwed into the screw holes 21b,... Of the cover body support part 21 through the through holes 20,. It is fixed to the body support part 21.

  In addition, slits 21a,... Are formed at the corners on the rear side of the cover body support portion 21, and the reinforcing ribs 13d in the mounting portion 13c are engaged with the slits 21a,. The cover body 13 and the cover body support portion 21 are firmly connected. Further, since the slits 21a,... And the reinforcing ribs 13d,... Can be used as positioning guides, the workability of the work of attaching the cover body 13 to the cover body support portion 21 of the front plate 1 can be improved. .

  Next, the configuration of the latch device 31 that is interlocked with the operation of the handle body 12 will be described. A square hole 32a is formed in the latch body 32, and a vertical portion 39a of a steel driving rod 39 is fitted into the square hole 32a. The latch body 32 is provided with a latch plate 33 and a stopper 35 protruding in the horizontal direction with a phase shift of approximately 90 °. The latch body 32, the latch plate 33, and the stopper 35 are made of synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS, and are integrally formed.

  The latch receiver 36 is made of the same synthetic resin as the latch main body 32 and the like, and is slid by engaging upper and lower engaging pieces 37 on the upper and lower sides of the notch 24, and the engaging claw 38 is engaged with the engaging hole 26. Is attached to the front plate 1. Then, by engaging the latch body 32 with the upper and lower engagement holes 36a, 36a of the latch receiver 36, the latch body 32, the latch plate 33, the stopper 35, and the drive rod 39 are supported so as to be rotatable around the vertical axis. The The upper portion of the vertical portion 39a of the drive rod 39 is also supported by a vertical hole (not shown) formed in the left side (right side in FIGS. 2 and 4) of the rotary bearing 14.

  As shown in FIG. 5, the left side plate 107 of the wagon body 102 has its front end continuously bent rightward (inward in the left-right direction) and rearward, and has a U-shaped bent portion 107a. Are formed at the rear end of the bent portion 107a. The front left reinforcing body 121 having a substantially U-shape in plan view, which is the inner side surface plate of the wagon body 102, abuts the front and rear contact plates 121 a and 121 a provided on the U-shaped opening side with the left-side plate 107. The left side plate 107 and the contact plates 121a, 121a are spot welded with the engagement grooves 121b formed on the front surface engaged with the engagement convex pieces 107b of the left side plate 107. Is firmly fixed.

  In this manner, the left front reinforcing member 121 fixed to the left side plate 107 has the locking projections 122, 122 with the drawers 104, 105 closed, and the latch plate 33 provided on the drawers 104, 105. , 33 projectingly provided at positions to be engaged with the engaging portions 33a, 33a. Since the locking protrusions 122 and 122 are integrally formed by pressing a press die from the back surface side of the surface facing the latch plate 33 of the left front reinforcing body 121, as shown in FIG. A lower surface 122a is formed on the lower surface of the lower slope 122. The lower surface 122a is inclined upward as the distance from the left front reinforcing member 121 (the inner surface of the wagon body 102) increases. Therefore, since the locking protrusions 122 and 122 are formed integrally with the left front reinforcing body 121, the cost can be reduced by reducing the component cost and the assembly cost by reducing the number of components.

  As shown in FIGS. 3 and 4, the latching portion 33 a of the latch plate 33 is a step on the rear side of the latching protrusion 122 (see FIGS. 5 to 7), and the front side of the latching portion 33 a is a recess. 33b. The recess 33b has a shape in which all or a part of the lower wall located on the lower side of the locking projection 122 is cut out in the front and rear upper and lower peripheral walls. Therefore, the latch plate 33 has a shape in which the lower part of the recess 33b is opened. Accordingly, when the drawers 104 and 105 are lifted with respect to the storage furniture main body 102 or an earthquake occurs in the state where the latching protrusion 122 and the latching portion 33a are latched, the drawers 104 and 105 are used. Even when the latch plate 33 rises relative to the locking projection 122 as shown in FIG. 7A to FIG. The lower surface 122 a of the locking projection 122 is configured not to contact the latch plate 33.

  In this way, even if the latch plate 33 rises relative to the locking projection 122, the latch plate 33 is recessed to prevent the lower surface 122 a of the locking projection 122 from contacting the latch plate 33. The shape in which the lower portion of 33b is opened is easier to secure the strength and rigidity of the latch plate 33 and the reliability of the latch device 31 is improved as compared with a configuration in which a latch hole is provided in the latch plate 33. It is more preferable.

  As shown in FIGS. 2 to 4, the latch plate 33 is elastically urged toward the left side plate 107 of the wagon body 102 by the torsion coil spring 40 with the drawers 104 and 105 closed. Therefore, since the latching portion 33a of the latch plate 33 is latched to the latching projection 122, the latch device 31 is activated with the drawers 104 and 105 closed, and the drawers 104 and 105 are unexpectedly moved as described above. Opening is prevented.

  In addition, since the clearance for absorbing the position error is provided also in the locking between the locking portion 33a of the latch plate 33 and the locking protrusion 122, the drawers 104 and 105 are also moved in the front-rear direction due to the presence of the clearance. Some movement is possible. Further, the latch main body 32 is provided with a rotation stopper 34 for restricting the rotation of the latch plate 33 in the direction of the locking projection 122 by a predetermined angle.

  The drive rod 39 has a horizontal portion 39b extending inward in the left-right direction (leftward in FIG. 2) of the front plate 1 at the upper portion of the vertical portion 39a. An abutting portion 18b extending from the connecting body 18 to the front side from the rear side contacts the horizontal portion 39b.

  Next, operations of the pulling device 11 and the latch device 31 will be described with reference to FIGS. When the puller body 12 is pulled forward as shown in FIG. 9B from the state where the drawers 104 and 105 in FIG. 9A are closed, the puller body 12 and the connecting body 18 are plate bodies 17 and 17 which are rotating shafts. Rotate forward around. Then, the horizontal portion 39b of the drive rod 39 is pushed forward by the contact portion 18b of the coupling body 18, and the latch body 32, the latch plate 33, and the stopper 35 are also moved along with the rotation of the drive rod 39 around the vertical axis. The latch plate 33 rotates in a direction away from the locking projection 122 provided on the inner side surface of the wagon body 102.

  Thus, when the handle body 12 is pulled forward, the latch device 31 is released in conjunction with the operation. Therefore, when the latch device 31 is released, the drawers 104 and 105 can be pulled out. As shown in FIG. 8, the stopper 35 made of synthetic resin abuts against the back surface of the steel front plate 1 to restrict the rotation of the drive rod 39, the latch plate 33, etc. Since the front end of the portion 39b is configured not to contact the back surface of the steel front plate 1, noise at the time of releasing the latch device 31 can be suppressed.

  In the operating state of the latch with the drawers 104 and 105 closed, even if the latch plate 33 rises relative to the locking projection 122 as described above, the lower surface 122a of the locking projection 122 contacts the latch plate 33. Do not touch. Accordingly, there is the inclined lower surface 122a (see FIG. 6) of the locking projection 122 and the drawers 104 and 105 can be slightly moved upward due to the presence of the clearance, but the pulling bodies 12 and 12 of the drawers 104 and 105 are pulled. If the operation is not performed, even if the drawers 104 and 105 are lifted and the latch plate 33 is raised relative to the locking projection 122 as shown in FIGS. Since the latch plate 33 does not contact the inclined lower surface 122a, the latch plate 33 does not rotate and the latch device 31 is not released.

  In the above description, the case where the locking protrusion 122 is integrally formed by pressing the press die from the back surface side of the surface facing the latch plate 33 of the left front reinforcing body 121 has been shown. Even when the protrusion is a resin molded product separate from the left front reinforcing body 121, the inclined lower surface may be formed by the draft angle of the mold for forming the locking protrusion, and at the time of molding, Even if the inclined lower surface is eliminated, if the drawers 104 and 105 are repeatedly moved in the left-right direction or the front-rear left-right direction with the drawers 104 and 105 closed, the locking projections, which are resin molded products, are worn and the inclination shown in FIG. An inclined lower surface similar to the lower surface 122a (a lower surface that inclines upward as the distance from the inner surface of the wagon body 102) may be formed.

  Even in such a case, as described above, since the lower part of the concave portion 33b with which the latching protrusion of the latch plate 33 engages is opened, the pulling bodies 12, 12 of the drawers 104, 105 must be pulled. For example, even when the drawers 104 and 105 are lifted, the latch plate 33 does not come into contact with the inclined lower surface of the locking projection, so the latch plate 33 does not rotate and the latch device 31 is not released. .

It is a vertical left side view showing an example in which the drawer latch device in the storage furniture according to the embodiment of the present invention is used in a wagon provided with upper and lower drawers. It is a rear view of a latch device and a pulling device. Similarly, it is a left side view. It is an exploded perspective view similarly. It is a disassembled perspective view which shows the structure of a latch plate and a latching protrusion. It is shape explanatory drawing of a latching protrusion, (a) is a right view, (b) is a vertical rear view. It is a left view which shows the up-and-down positional relationship of a latch board and a latching protrusion. It is a partial vertical section rear view which shows the structure of a latch apparatus. It is explanatory drawing of the interlocking | linkage operation | movement of a pulling device and a latch apparatus, (a) has shown the operating state of the latch, (b) has shown the cancellation | release state of the latch.

Explanation of symbols

101 Wagon (storage furniture)
102 Wagon body (storage furniture body)
103 Guide means 104 Upper drawer 105 Lower drawer 106, 107 Side plate 121 Left front reinforcement (inner side plate)
122 Locking projection 122a Lower surface 1 Front plate 11 Handle device 12 Handle body 12 Handle body 13 Cover body 14 Rotating bearing 14a Engaging recess 17 Plate body (rotating shaft)
18 connecting body 18b contact portion 31 latch device 32 latch body 32a square hole 33 latch plate 33a latching portion 33b recess 34 rotation stopper 35 stopper 36 latch receiver 36a engaging hole 37 engaging piece 38 latching claw 39 driving rod 39a vertical Part 39b horizontal part 40 torsion coil spring

Claims (3)

A latch plate extending in a horizontal direction from a latch body supported so as to be rotatable about a vertical axis in the drawer is elastically urged toward an inner surface of the storage furniture body in a state where the drawer is closed, By providing a locking projection having a lower surface inclined upward as it moves away from the inner surface on the inner surface of the storage furniture body, and a locking portion provided on the latch plate is locked to the locking projection. A latch device for a drawer in a storage furniture that is latched and is released in conjunction with an operation of pulling the pull handle of the drawer,
Even when the drawer rises relative to the storage furniture body in a state where the locking protrusion and the locking portion are locked, the shape does not contact the lower surface of the locking protrusion. Latch device for drawers in storage furniture comprising a latch plate.   2. The drawer latch device for storage furniture according to claim 1, wherein the latch plate is formed with a recess facing the inner surface of the storage furniture main body on the front side of the locking portion, and the bottom of the recess is opened. . 2. The storage furniture according to claim 1, wherein the locking protrusion is formed integrally with the inner side plate by pressing a press mold from the back side of the surface of the inner side plate of the storage furniture main body facing the latch plate. Drawer latch device.

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