JP3035007U - Furniture door latch - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a door latching tool for furniture capable of surely maintaining a closed state of a door and surely preventing a stored item from being opened even when a load collapses and hits the door. . SOLUTION: A latch main body 7 is attached to a door 5 that is openably and closably supported by a furniture main body 3, and a locked member that is attached to the furniture main body 3 facing the latch main body 7 and has a sliding contact surface on the front surface. The door latch tool 1 is configured. The latch main body 7 is movably supported in the metal case 11 so that the front end of the latch main body 7 is locked by the locked portion 9, and the locking member 13 has an engaged portion 13c in part. The locking member 13 is movably supported in the axial direction by the elastic member 15 that normally urges the locking member 13 in the locking direction, and the cylindrical portion 21a of the closing plate 21 attached to the front surface of the case 11, and actuated at the rear end portion. Operation shaft 23 having a portion 25
And swingably supported by the case 11, and the engaged portion 13c
The swing member 19 has one arm portion 19a that engages with and the other arm portion 19b that is connected to the operation portion 25 of the operation shaft.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a door latch for furniture that is attached to furniture with a door such as a storage cabinet attached to a wall surface of a kitchen, a cooktop on which cooking utensils are placed, and a Western-style closet.

[0002]

[Problems to be solved by the device]

 In the above-mentioned furniture with various doors, the latch main body is attached to the open end side of the door and has a locked portion at the tip made of polyamide resin with good sliding that is formed into a cylindrical shape or spherical shape, and the latch main body. Attached to furniture facing each other, the base end of which is rotatably supported and the end of which has a lockable part to which the locked part can be locked, and the elastic forces of the wire springs abut each other. A door latching device including a stopper having a pair of locking members biased in this manner is attached.

In this door latch device, the locked portion of the latch main body that is inserted and locked between the locking portions of the locking member of the stopper by the closing operation of the door is clamped by the elastic force of the wire spring. It is designed to keep the door closed.

However, in the door latch device described above, when a stored item collapses due to an earthquake or the like and is pressed against the door by a force greater than the elastic force of the wire spring, the door is opened. There was a risk that the stored items would jump out.

The present invention has been devised to solve the above-mentioned conventional drawbacks, and its problem is to ensure that the closed state of the door is kept and the stored items collide with the door and collide with the door. It is an object of the present invention to provide a door latch device for furniture that can reliably prevent the door from being opened even when it is opened.

[0006]

[Means for solving the problems]

 Therefore, according to the present invention, a latch main body attached to a door that is openably and closably supported by the furniture main body is attached to a furniture main body opposite to the latch main body, and is locked to a locked member having a sliding contact surface on the front surface. In the door latch device that keeps the door closed, the latch main body is movably supported in the metal case so that the front end is locked to the locked portion, and the latch body is partly engaged. And a resilient member that constantly urges the locking member in the locking direction, and a cylindrical portion of the closing plate that is attached to the front surface of the case, and is supported so as to be movable in the axial direction. Swing with an operating shaft having an operating part at the rear end, and one arm that is swingably supported by the case and that engages with the engaged part and the other arm that is connected to the operating part of the operating shaft. It is composed of parts.

When the door is closed with respect to the furniture body, the locking member is moved against the elastic force of the elastic member as the tip of the locking member slides against the sliding surface of the locked member. After passing over the locked member, the elastic member moves by the elastic force of the elastic member to lock it.

When opening the door, when the operation shaft is moved forward, the rocking member is rocked by the one arm that rocks the rocking member to engage the engaged portion. It moves against the force and unlocks the locked member.

[0009]

[Embodiment of the invention]

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

Embodiment 1 FIG. 1 is an exploded perspective view showing a latch body of a door latch device.

FIG. 2 is a central vertical cross section of the latch body.

FIG. 3 is a perspective view showing a mounting state of the door latch device.

The door latching device 1 is composed of a latch body 7 fixed to a door 5 that is openably and closably attached to the furniture body 3, and a locked member 9 fixed to the furniture body 3 facing the latch body 7. It is configured.

The case 11 of the latch body 7 is made of metal and has a box shape with an open front surface. An opening 11a is formed in the rear portion of the bottom surface of the case 11 and a shaft support portion 11b is formed in the lower center of both side walls. ing.

A metal lock member 13 is supported in the case 11 so as to be vertically movable through the opening 11 a. A bearing portion 13a is integrally formed on the front surface of the central portion of the locking member 13, an elastic member 15 such as a compression spring is attached to the bearing portion 13a, and an upper end portion of a shaft 17 supported by the case 11. The lower end is inserted. The locking member 13 is urged by the elastic force of the elastic member 15 so that the lower end of the locking member 13 always moves to the locking position where it projects from the opening 11a. A notch 13b is formed in the upper middle portion of the locking member 13, and an engaged portion 13c is formed in the locking member 13 located below the notch 13b.

A swing member 19 is rotatably supported on the shaft support 11 b of the case 11. The swinging member 19 has one arm portion 19a and another arm portion 19b formed by bending a metal plate into a substantially V shape, and the tip end portion of the one arm portion 19a is engaged with the engaged portion 13c.

A metallic closing plate 21 is attached to the front opening of the case 11, and a cylindrical portion 21 a is provided on the upper front surface of the closing plate 21. The operating shaft 23 is inserted into the cylindrical portion 21a, and a hook portion 25 as an operating portion is provided at the rear end portion of the operating shaft 23 in the cutout portion 13b and at the rear surface of the other arm portion 19b. It is provided so that it can be hooked. As the hook portion 25, the end portion of the operation shaft 23 may be bent downward or attached separately. A guide plate 21b is integrally bent and formed on the closing plates 21 located on both sides of the hook portion 25 so as to extend rearward. The guide plate 21b regulates the rotation of the hook portion 25. There is. Further, mounting pieces 11d having a through hole 11c in the central portion are integrally formed on both sides of the case 11 by bending, and the cylindrical portion 21a is inserted into the mounting hole 5a formed in the door 5 so that the latch body 7 is fixed. After the temporary fixing, the fixing screw 27 inserted into the through hole 11c of the mounting piece 11d is screwed to the door 5 to fix the latch body 7.

The locked member 9 is made of metal, and is provided on the upper surface of the flat plate 9a screwed to the furniture main body 3 on the sliding contact surface 9b and the rear portion of the sliding contact surface 9b that are inclined while standing upright toward the rear. It is configured to have a hanging wall 9c. The locked member 9 is either a flat plate 9a, a sliding contact surface 9b and a hanging wall 9c which are integrally press-molded, or a member having the sliding contact surface 9b and the hanging wall 9c are welded on the flat plate 9a. It may be. Reference numeral 29 in the drawing is a knob attached to the front end portion of the operation shaft 23 protruding from the front surface of the door 5.

Next, the latching action and the latch releasing action of the door latch device 1 configured as described above will be described.

FIG. 4 is a vertical sectional view showing a state in the middle of locking.

FIG. 5 is a vertical sectional view showing a locked state.

FIG. 6 is a vertical sectional view showing the unlocked state.

First, the locking action will be described. When the door 5 is pressed toward the furniture body 3 toward the closing side, the locking member 13 is brought into sliding contact with the sliding contact surface 9b of the locked member 9 at the tip thereof. Along with this, the elastic member 15 moves upward against the elastic force and rides over the top of the sliding surface 9b, and then the elastic force of the elastic member 15 moves downward and locks the hanging wall 9c. . At this time, since the rear surface of the hook portion 25 located in the notch portion 13b of the locking member 13 is formed in a taper shape which gradually becomes thinner from the upper portion to the lower portion, the locking member 13 can be moved upward. I am letting you. Further, since one arm portion 19a of the rocking member 19 is locked to the engaging portion 13c of the lock member 13, the rocking member 19 rocks as the lock member 13 moves upward.

In the locked state, the locked state of the locking member 13 with respect to the hanging wall 9c is maintained by the elastic force of the elastic member 15, so that, for example, an item housed in the furniture main body 3 collapses in the load. Even when the door 5 is pressed against the door 5, it is possible to prevent the door 5 from being opened by the force, and it is possible to maintain the accommodation state of the articles.

Next, in order to open the door 5 closed as described above, the operating shaft 23 is pulled toward the front side by the knob 29, and the hook portion 25 hooked to the other arm portion 19b is moved to the swinging member 19. Is swung in the clockwise direction shown in FIG. As a result, one arm portion 19a of the rocking member 19 is engaged with the engaging portion 13c of the locking member 13, so that the locking member 13 is elastically moved by the elastic force of the elastic member 15 as the rocking member 19 rocks. Against this, the front end moves to a position where it crosses the top of the sliding contact surface 9b, and the door 5 can be opened.

In the above description, the hook portion 25 attached to the operation shaft 23 is locked on the rear surface of the other arm portion 19b of the swing member 19, and the swing portion is moved when the operation shaft 23 is moved to the front side. Although the material 19 is configured to swing, as shown in FIG. 7, a large diameter portion 23a is formed at the rear end portion of the operation shaft 23, and the operation shaft 23 is inserted into the other arm portion 19b, and the large diameter portion 23 is inserted. A configuration may be adopted in which a long hole 19c for preventing a from coming off is formed and the swinging member 19 can be swung by the operation of moving the operating shaft 23 forward. The other components shown in FIG. 7 are the same as those described above, and the same reference numerals are given to omit the description.

Second Embodiment FIG. 8 is an exploded perspective view showing a latch main body of a door latch device.

FIG. 9 is a central vertical cross section of the latch body.

The door latching device 31 is composed of a latch body 33 fixed to the door 5 attached to the furniture body 3 so as to be openable and closable, and a locked member 9 fixed to the furniture body 3 facing the latch body 33. It is configured. The furniture main body 3, the door 5, and the locked member 9 are the same as those in the first embodiment, and the same reference numerals are given and detailed description thereof is omitted.

The case 35 of the door latching device 31 is made of metal and has a box shape with an open front surface, and an opening 35a is formed in the rear portion of the bottom surface.

A metal lock plate 37 is supported in the case 35 so as to be vertically movable through the opening 35 a. The upper portion of the lock plate 37 is bent forward with a required width to form a sliding contact portion 37a. Further, a shaft support portion 37b is integrally formed on the lower front surface of the locking plate 37, and a support shaft 41 having an elastic member 39 such as a compression spring attached between the shaft support portion 37b and the upper plate of the case 35. Has been inserted. The locking plate 37 is urged by the elastic force of the elastic member 39 so that the lower part thereof always projects from the opening 35a. The shaft support portion 37b of the locking plate 37 restricts the downward movement of the locking plate 37 by contacting the bottom plate of the case 35.

A closing plate 43 is attached to the front surface of the locking plate 37, and a part of the closing plate 43 is provided with a cylindrical portion 43a having an axis in the front-rear direction. An operating shaft 45 is rotatably inserted in the cylindrical portion 43a, and a lever 45a that contacts the sliding contact portion 37a is provided at the rear end of the operating shaft 45. The mounting position of the operating shaft 45 with respect to the lock plate 37 is set so that the lever 45a is located below the sliding contact portion 37a of the lock plate 37 that is moved downward by the elastic force of the elastic member 39. Further, the lever 45a may be either a lever in which the rear end of the operating shaft 45 is bent in the direction orthogonal to the axis or a lever mounted in the rear end of the operating shaft 45 so as to extend in the axial direction. Further, on the inner surface of the closing plate 43, a regulation plate 43b is bent and formed so as to extend rearward at a position below the operating shaft 45, and the regulation plate 43b slides on the lever 45a by abutting against the lever 45a. Rotation in a direction away from the contact portion 37a is restricted. Reference numeral 47 in the drawing is a knob attached to the front end portion of the operating shaft 45.

Next, the lock action and lock release action of the door latch device 31 will be described.

FIG. 10 is a vertical cross-sectional view showing a state during locking.

FIG. 11 is a vertical sectional view showing a locked state.

FIG. 12 is a vertical sectional view showing the unlocked state.

First, the locking action will be described. When the door 5 is pressed against the furniture main body 3 in the closing direction, the locking plate 37 slides the tip of the locking member 9 against the sliding surface 9b of the locked member 9. Accordingly, after moving upward against the elastic force of the elastic member 39 to get over the top of the sliding surface 9b, the elastic force of the elastic member 39 moves downward and locks the hanging wall 9c. R. As a result, the closed state of the door 5 with respect to the furniture main body 3 is maintained, so that, for example, even if an article stored in the furniture main body 3 is collapsed and pressed against the inner surface of the door 5, the door 5 is opened. Can be prevented, and the housed state can be maintained.

On the other hand, in order to open the door 5 from the furniture main body 3, when the operating shaft 45 is rotated in the clockwise direction shown in the drawing through the knob 47, the lever 45a comes into contact with the sliding contact portion 37a and is locked. The stopper plate 37 is pushed up against the elastic force of the elastic member 39 to a position where its tip is slightly above the top of the sliding contact surface 9b, and the latched state with respect to the hanging wall 9c is released. Then, in the above state, the door 47 is opened from the furniture main body 3 by pulling the knob 47 to the front side.

In the above description, the lever 45a is a lever that extends the rear end of the actuating shaft 45 in the direction orthogonal to the axis, but may be a flat cam.

[0040]

[Effect of the invention]

 Therefore, according to the present invention, it is possible to reliably maintain the closed state of the door and reliably prevent the stored items from being opened even when the load collapses and hits the door.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a latch body of a door latch device.

FIG. 2 is a central vertical cross section of the latch body.

FIG. 3 is a perspective view showing a mounting state of a door latch tool.

FIG. 4 is a vertical cross-sectional view showing a state during locking.

FIG. 5 is a vertical sectional view showing a locked state.

FIG. 6 is a vertical cross-sectional view showing an unlocked state.

FIG. 7 is a vertical sectional view showing a modified embodiment.

FIG. 8 is an exploded perspective view showing a latch body of the door latch device.

FIG. 9 is a central longitudinal cross section of the latch body.

FIG. 10 is a vertical cross-sectional view showing a state in the middle of locking.

FIG. 11 is a vertical sectional view showing a locked state.

FIG. 12 is a vertical cross-sectional view showing an unlocked state.

[Explanation of symbols]

1: Door latch tool, 3: Furniture body, 5: Door, 7: Latch body, 9: Locked member, 9b: Sliding contact surface, 11: Case, 1
3: locking member, 13c: engaged portion, 15: elastic member, 1
9: rocking member, 19a: one arm, 19b: other arm, 2
1: Closing plate, 21a: Cylindrical part, 23: Operating shaft, 25: Hook part as an operating member

Claims (6)

[Utility model registration claims] 1. A latch main body mounted on a door which is openably and closably supported on a furniture main body, is attached to a furniture main body opposite to the latch main body, and is locked to a locked member having a sliding contact surface on the front surface. In a door latch device that keeps a door closed, a latch body is movably supported in a metal case so that a tip portion of the latch body is locked to a locked portion, and an engaged portion is partially provided. The locking member, an elastic member that always urges the locking member in the locking direction, and a cylindrical portion of the closing plate attached to the front surface of the case are movably supported in the axial direction and the rear end portion. An operating shaft having an operating portion, and a swinging member having one arm that is swingably supported by the case and that engages with the engaged portion and the other arm that is connected to the operating portion of the operating shaft. When the operating shaft is moved forward, the rocking member is swung to engage the engaged portion with the lock by the one arm portion. Door latch device of furniture that allows releasing the locking with respect to the locking member is moved against the member to the elastic force of the elastic member. 2. The operating portion of the operating shaft comprises a hook that is hooked on the rear surface of the other arm of the swinging member, and the swinging member is swung in the unlocking direction by operating the operating shaft toward the front. Door latching tool for furniture made possible. 3. The operating portion of the operating shaft of claim 1, wherein the operating portion of the operating shaft is locked in a long hole formed in the other arm of the swinging member in a retaining state, and moves in the long hole by operating the operation shaft forward. Meanwhile, a furniture door latch device that allows the swinging member to swing in the unlocking direction. 4. A latch main body, which is attached to a door that is openably and closably supported by the furniture main body, is attached to a furniture main body opposite to the latch main body, and is locked to a locked member having a sliding contact surface on the front surface. In a door latch device that keeps a door closed, a latch body is movably supported in a metal case so that a tip portion of the latch body is locked by a locked portion, and a sliding contact portion is partially provided. The locking member, an elastic member that normally urges the locking member in the locking direction, and a cylindrical portion of a closing plate that is attached to the front surface of the case are rotatably supported and are covered at the rear end. An operating shaft having an operating portion that abuts the sliding contact portion, and the locking member is moved against the elastic force of the elastic member by bringing the operating portion into contact with the sliding contact portion by rotating the operating shaft. A door latching tool for furniture that can unlock the locked member. 5. The door latch device for furniture according to claim 4, wherein the operating portion is a lever extending in a direction orthogonal to the axis. 6. The door latching device for furniture according to claim 4, wherein the operating portion is an eccentric cam.