JP3971846B2 - Door opening prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention opens doors to prevent the occurrence of accidents such as falling, scattering, or damaging human bodies or other objects when open doors such as cupboards and furniture are opened and stored when an earthquake occurs The present invention relates to a prevention device. More particularly, the present invention relates to a door opening prevention device that has a simple structure, has excellent response when an earthquake occurs, and can automatically unlock the door and allow the door to open when the earthquake ends.
[0002]
[Prior art]
When an earthquake with a relatively large seismic intensity occurs, tableware stored in the cabinet, furniture, etc., containers such as kitchenware, various equipment, etc. move and collide with the open door to spread it out, and the stored items are exposed to the outside. It has been reported in recent earthquakes that serious accidents occur that fall, fly and break, or damage human bodies and objects located near hinged doors.
As countermeasures for preventing such accidents, it is effective to automatically lock the hinged doors such as cupboards using earthquake vibration to prevent the opening, and various lock devices have been proposed conventionally. ing. However, any of the locking devices has a large number of parts and a complicated configuration, so that the cost is high, and malfunctions, failures, etc. are likely to occur.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of the above, and the problem is that when an earthquake occurs, open doors such as cupboards and furniture are opened and stored, and the stored items fall, scatter or break, and human bodies and other objects can be damaged. It is a door opening prevention device to prevent the occurrence of accidents such as damage, and it has a simple configuration, has excellent responsiveness in the event of an earthquake, and automatically unlocks the door at the end of the earthquake. An object of the present invention is to provide a door that can allow the door to be opened.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is equipped in a cupboard comprising a cupboard body and a door pivotally supported by one end edge of the opening of the cupboard body to open and close the opening, and having a predetermined seismic intensity or more. in the door opening prevention device for preventing opening of the door and actuated when the earthquake occurs, elastically opening and closing the said gap with a gap having a wide gap and a width narrow gap portion through and communicating adjacent to each other A latch having a bifurcated locking portion at the tip , and a space that can be inserted through the bifurcated locking portion, and when the bifurcated locking portion protruding from the space is in an expanded state, the bifurcated locking portion is a receiving member for locking the wedge to allow deformation of the fit within the wide gap portion of the bifurcated locking portion protruding from the cavity of the receiving during closure of the normal of the door member to the closing direction of the bifurcated locking portion pin and, above actuate the wedge pins during the predetermined seismic intensity over earthquake And actuating mechanism for preventing the deformation of the closing direction of the bifurcated locking portion from the wide gap portion is displaced in the narrow gap portion, and having a.
The invention according to claim 2 is characterized in that the latch is fixed to the back surface of the door, the receiving member is fixed on the bottom plate of the cupboard body, and an operating mechanism is arranged at an appropriate rear position of the receiving member.
The invention according to claim 3 is characterized in that the latch is fixed on the bottom plate of the cupboard body, the receiving member is fixed to the back surface of the door, and an operating mechanism is arranged at an appropriate rear position of the latch.
According to a fourth aspect of the present invention, the latch includes a bifurcated branch portion having a bifurcated branch piece at a tip thereof, a gap formed between the two branch pieces, and a wide width formed on an opposing surface of both branch pieces. The receiving member has a support space for receiving the bifurcated latching portion of the latch, and the operating mechanism is supported so as to swing in a certain direction when an earthquake having a predetermined seismic intensity or more occurs. It is characterized by comprising a wedge pin supported by a bracket and a weight for keeping the posture of the wedge pin constant during normal times.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. FIG. 1 is a partially sectional perspective view showing an example of a configuration of a cupboard provided with a door opening prevention device of the present invention, and FIG. 2 is a side view of an example of a door opening prevention device. 3A is an exploded perspective view of the door opening prevention device, FIG. 3B is a perspective view of the latch, and FIGS. 4A and 4B, FIG. 5A and FIG. FIG. 6A and FIG. 6B are plan views showing the operating state of the operating mechanism. The door opening prevention device of the present invention is generally applicable to a cupboard provided with a door pivotally supported by a hinge or the like so as to open to the front side, and is pivotally supported by one end edge of the opening of the cupboard body to open and close the opening. It is a means for preventing the occurrence of a situation where the door to be pushed is expanded by the contents accommodated inside the cabinet body when an earthquake occurs. As shown in FIG. 1, the cupboard 1 includes a cupboard body 2 and a door 3 that is pivotally supported by one end edge of the opening of the cupboard body 2 to open and close the opening. The door opening prevention device 5 according to this embodiment is provided inside the cupboard body 2, in this example, inside the door 3 and on the bottom plate 4. As shown in FIGS. 2 and 3, the door opening prevention device 5 includes a latch 10 having a bifurcated locking portion 11 that elastically opens and closes at a distal end portion, and a support space through which the bifurcated locking portion 11 can be inserted. And a receiving member 15 that locks the bifurcated locking portion 11 when the bifurcated locking portion 11 that protrudes from the support space 16 to the opposite side is in an expanded state, and is received when the normal door 3 is closed. A wedge that fits into a wide portion (wide gap portion) 12a in the gap 12 of the bifurcated locking portion 11 that protrudes from the void 16 of the member 15 to the opposite side and allows deformation in the closing direction of the bifurcated locking portion. a pin 20, to operate the wedge pin 20 in the event of an earthquake to prevent deformation in the closing direction of the bifurcated locking portion 11 is displaced to the narrow portion (width narrow gap portion) within 12b from inside the wide portion 12a And an operating mechanism 25. Since the wide portion 12a and the narrow portion 12b are adjacent and communicated with each other to form the gap 12, the wedge pin 20 moves between the wide portion and the narrow portion. be able to.
[0006]
More specifically, the latch 10 is made of an elastically deformable metal, resin, rubber, or the like, and the bifurcated locking portion 11 is integrated with the base member 13 that is fixed to the inner side surface of the door 3 with a screw or the like. It has a configuration that protrudes. The bifurcated locking portion 11 includes branch pieces 11a and 11a in which a member extending from the base member 13 is bifurcated from the middle. The branch pieces 11a and 11a are opposed to each other with a gap 12 therebetween. Locking projections 11b are provided on the outer ends of the tips of 11a and 11a, respectively. Further, each branch piece can be elastically deformed in the direction of narrowing the gap 12.
The receiving member 15 is configured by a plate material made of metal, resin, or other material in a substantially U shape as shown in the figure, and is fixed on the bottom plate 4 with screws or the like. The latch 10 is fixed inside the door 3. The bifurcated locking portion 11 is configured to be inserted into the support space 16 of the receiving member 15 when the door is closed. The relationship between the width dimension of the support space 16 and the dimension of the bifurcated locking portion 11 is that the bifurcated locking portion 11 is inserted into the support space 16 when the door is closed and is locked, and the bifurcated locking when the door is opened. It is set so that the part 11 can be detached from the support space. That is, when the protrusion 11b located at the tip of the bifurcated locking portion 11 enters the support space 16 by closing the door, first, the tip surface 11b ′ of the protrusion 11b (inclined toward the door). Comes into contact with the leading edge 15a of the receiving member 15, and the two protrusions 11b are pushed inward along the leading edge 15a of the receiving member by further pressing the door 3 in the closing direction, so that the two branching pieces 11a approach each other. Elastically deforms in the direction, and finally both branch pieces enter the support space 16. Thereafter, by further pressing the door in the closing direction, when the projecting portion 11b leaves the rear end edge 15b of the receiving member 15, both the branching pieces 11a are deformed in the expanding direction. For this reason, the protrusion 11b is locked in a state of being caught by the rear end edge 15b of the receiving member, and the door cannot be opened.
The door can be opened by an operation reverse to the above.
[0007]
The operating mechanism 25 for operating the wedge pin 20 supports a support bracket 26 fixed on the bottom plate 4 and a fulcrum 20a provided on the support bracket 26 at an appropriate position of the wedge pin 20 so as to be rotatable in the vertical direction. And a weight 29 integrated with a rear end portion of the wedge pin 20 via a rod-like connecting member 28. In the figure, the support bracket 26, the support shaft 27, and the connecting member 28 are indicated by simple lines. However, this is merely a measure for convenience of illustration and explanation, and the support bracket 26 is actually a plate material or the like. The connecting member 28 is made of a rigid rod, wire or the like. The weight and length of the connecting member 28, the position of the wedge pin 20 to which the connecting member 28 is fastened, the length of the connecting member 28, the weight of the weight 29, the position of the fulcrum 20a, etc. Because it is an important factor that determines the nature, it is set according to the seismic intensity of the earthquake that triggers the start of operation. For example, when there is no earthquake or an earthquake with a seismic intensity of less than 4, the wedge pin 20 is maintained in a horizontal position as shown in FIGS. The latch is configured to fit within the wide portion 12a of the latch. When the wedge pin 20 enters the wide portion 12a, the diameter of the wedge pin and the dimensions of the wide portion 12a are set so that both branch pieces 11a can be elastically deformed in the direction of narrowing the gap 12. To do. The connecting member 28 is preferably a rod-shaped member (or a plate-shaped member) integrated with the wedge pin 20 rather than configured to swing as a wire. Alternatively, the weight 29 may be integrated directly with the rear end portion of the wedge pin 20. The operating mechanism 25 can be operated not only when the direction of vibration caused by the earthquake is along the length direction of the wedge pin 20 but also when vibrating in the vertical direction. However, when it vibrates in the direction perpendicular to the longitudinal direction of the wedge pin 20, it is difficult to operate, but in this case, the article in the cupboard does not fall and move to the door side in the first place, so the door is not spread out. Less need to operate.
[0008]
FIGS. 4A and 4B show a state in which the bifurcated locking portion 11 of the latch can be attached to and detached from the receiving member 15 because the wedge pin is located in the wide portion.
Further, when an earthquake exceeding seismic intensity 4 occurs, the weight 29 is greatly shaken, so that the balance balance of the wedge pin is lost, and the wedge pin 20 is centered on the fulcrum 20a as shown in FIG. 6 (b) and FIG. Is vibrated in the vertical direction to fit the tip portion into the narrow portion 12b, so that the branch piece 11a is obstructed by the tip portion of the wedge pin that has entered the narrow portion 12b and elastically deforms in a direction to narrow the gap 12. Can not do. Even if the stored items such as tableware and electronic equipment housed in the closet due to the occurrence of an earthquake cause a load collapse and collide toward the door 3, the operation of the operating mechanism 25 set to operate prior to the stored items Thus, since the latch 10 is locked by the receiving member 15, it is possible to obtain a sufficient locking force for preventing the opening against the pressing force in the direction of opening the door.
[0009]
Since the operating mechanism 25 of the present invention employs a pendulum type response mechanism in which the weight 29 is suspended by the connecting member 28, the responsiveness is extremely higher than that of the other conventional mechanism for preventing door opening. Well, it is possible to effectively prevent the occurrence of a situation in which the accommodated article opens the door in advance. In addition, you may provide in the bottom plate etc. the guide which controls the moving direction of the weight 29 to a fixed direction as needed.
Further, when the amplitude of the weight becomes a certain value or less after the earthquake is finished, the wedge pin can be positioned in the wide part, so that the door can be opened. In addition, by setting the expansion force of the branch piece 11a constituting the bifurcated locking portion sufficiently strong, the door is opened by the stored article collapsed even in the operation stop state of the operation mechanism due to the end of the earthquake. The situation can be prevented.
Alternatively, by setting the frictional resistance between the inner wall surface of the narrow portion 12b and the wedge pin 20 large, when the wedge pin 20 once enters the narrow portion 12b, after the earthquake is over However, if the wedge pin is configured so that it cannot be easily detached from the narrow portion, it is possible to prevent the door from being pushed out by an article inside the cupboard after the earthquake.
In addition, when the door is open in a normal state without an earthquake, the operating mechanism 25 may be operated by some kind of bounce such as a person's hand or a stored article colliding with the door opening prevention device. In this case, if the door is to be closed when the wedge pin 20 is tilted in a direction deviating from the horizontal posture, the tip of the wedge pin 20 is in the wide portion 12a between the branch pieces 11a and 11a of the latch 10. Cannot be fitted, and a situation occurs in which the narrow portion 12b is hit and obstructs the closing of the door.
[0010]
8 (a), (b) and FIG. 9 (a), (b) are modified examples aimed at eliminating such problems, and FIGS. 8 (a) and 8 (b) are planes showing the door open state. FIGS. 9A and 9B are a plan view and a perspective view showing a door closed state, respectively.
In this embodiment, for example, positioning members 30 that are elastically openable and closable are provided on the two rear end edges 15b of the receiving member 15, respectively. When the door is opened as shown in FIG. In the illustrated closed state, the tip of the wedge pin 20 is fitted into the receiving hole 31 provided in each positioning member 30 so that the horizontal posture can be maintained. For this reason, when the door is open, the wedge pin 20 can always maintain a horizontal posture by the positioning member 30, and when the door is closed, the wide portion 12a between the branching pieces 11a and 11a of the latch. It can be smoothly inserted. That is, there is no obstacle when the door is closed.
The receiving hole 31 is formed in an arc shape or a taper shape having a long vertical length so that the tip of the wedge pin that is displaced toward the narrow portion 12b can be corrected to a horizontal posture. Is preferred. That is, for example, when the wedge pin 20 swings up and down from the horizontal posture when the door is opened from the closed state of FIG. 9, the diameter of the receiving hole 31 is equal to the tip diameter of the wedge pin 20. Although it is difficult to fit the wedge pin tip into the receiving hole, the vertical length of the receiving hole 31 is set to be long and the wedge pin tip can slide along the inner peripheral edge of the receiving hole 31. By doing so, the wedge pin can be easily returned to the horizontal posture.
Further, when the door is in the closed state as shown in FIG. 9, both positioning members 30 are pushed and spread by the tip of the latch 10, so that the closing of the door is not hindered.
As the positioning member 30, for example, a plate material made of resin, rubber or the like having a planar shape is used. When the door is opened, the rear end side opening of the receiving member 15 is closed as shown in FIG. 9 is configured so as to be pushed backward by a latch. Alternatively, a plate material may be supported on each rear end edge 15b by using a hinge (not shown) so that the plate material can be opened and closed, and each plate material may be always elastically biased in the closing direction by a spring (not shown).
[0011]
Next, FIGS. 10A, 10B, and 10C are a side view, a plan view, and an exploded perspective view of another embodiment of the present invention, in which the tip is directed to the door side. The latch 10 is fixed onto the bottom plate 4 of the cupboard, the receiving member 15 is fixed to the inner wall of the door 3, and the operating mechanism 25 is disposed in the hole 35 formed in the base 13 of the latch to latch the wedge pin 20. It is constructed so as to be inserted into the gap 12 from the hole 35 at the rear side.
In other words, a horizontal support shaft 27 is disposed in the hole 35, and the support shaft 27 pivotally supports an appropriate position of the wedge pin 20 so as to move up and down. Further, the weight 29 is fixed from the rear end portion of the wedge pin 20 through the connecting member 28.
The receiving member 15 has a space 16 for receiving the leading end of the latch, and an opening 16a for locking the leading end of the latch is formed on the side wall thereof.
Of course, a wide portion and a narrow portion similar to those in the above-described embodiment are provided in the gap 12 of the latch.
[0012]
In FIG. 10, the operating mechanism is provided in the hole 35 formed in the latch, but the operating mechanism 25 having the same configuration as that of the other embodiment may be provided on the bottom plate behind the latch.
In addition, each form example shown in the description of the above-described form examples or in the drawings is merely an example, and is not limited to the above-described form.
Therefore, for example, the normal posture of the wedge pin constituting the operating mechanism is set to an inclined posture other than the horizontal posture, and the widened portion for receiving the wedge pin in the inclined posture is formed on the inner surface of the branch piece. It is included in the range.
Moreover, although the door opening prevention device is arranged on the bottom plate of the cupboard body in the above embodiment, it may be arranged on the ceiling part or the side wall part of the cupboard body. Of course, when changing the arrangement location in this way, it is necessary to make necessary modifications according to the respective arrangement location.
[0013]
【The invention's effect】
As described above, according to the present invention, when an earthquake occurs, an open door such as a cupboard or furniture is opened and stored, and an accident such as a fall, scattering, or damage to a human body or other objects occurs. A door opening prevention device that prevents accidents, has a simple structure, has excellent responsiveness in the event of an earthquake, and automatically unlocks the door at the end of the earthquake to allow the door to open Can be provided.
That is, the door opening prevention device of the present invention is generally applicable to a cupboard provided with a door pivotally supported by a hinge or the like so as to open to the front side, and is pivotally supported by one end edge of the opening of the cupboard body. In order to prevent the occurrence of a situation in which the door that opens and closes is pushed and expanded by the contents accommodated inside the cabinet body in the event of an earthquake, a latch with a bifurcated locking portion at the tip and a latch are inserted A receiving member that locks the latch and an operating mechanism that prevents the latching portion of the latch from contracting and coming off from the receiving member when an earthquake occurs are provided. A door opening prevention device having such a simple and compact configuration has not been proposed so far, and its practicality is high.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional perspective view showing a configuration of an example of a cupboard provided with a door opening prevention device of the present invention.
FIG. 2 is a side view of an example of the door opening prevention device of the present invention.
3A is an exploded perspective view of a door opening prevention device, and FIG. 3B is a perspective view of a latch.
4A and 4B are perspective views of an operating mechanism, respectively. FIG.
FIGS. 5A and 5B are perspective views of an operating mechanism, respectively.
6A and 6B are plan views showing the operating state of the operating mechanism.
FIG. 7 is a perspective view showing the operation of the device of the present invention.
FIGS. 8A and 8B are a plan view and a perspective view showing a door open state, respectively.
FIGS. 9A and 9B are a plan view and a perspective view showing a door closed state, respectively.
FIGS. 10A to 10C are a side view, a plan view, and an exploded perspective view of another embodiment of the present invention.
[Explanation of symbols]
1 closet, 2 closet body, 3 door, 4 bottom plate, 5 door opening prevention device, 10 latch, 11 bifurcated locking part, 11a branch piece, 11b convex part, 12 gap, 12a wide part, 12b narrow part, 13 base Member, 15 receiving member, 16 space, 20 wedge pin, 25 actuating mechanism, 26 support bracket, 27 support shaft, 28 connecting member, 29 weight, 30 positioning member, 31 receiving hole.

Claims (4)

Blocking the cupboard body and is pivotally supported at one end edge of the opening of the cupboard body is equipped in a cupboard made of a door for opening and closing the opening, and operates when a predetermined seismic intensity more earthquake the opening of the door And a latch having a bifurcated locking portion at a distal end portion that has a wide gap portion and a narrow gap portion that are adjacent to and in communication with each other and that elastically opens and closes the gap. A receiving member for locking the bifurcated locking portion when the bifurcated locking portion projecting from the void is in an expanded state and a receiving member for closing the normal door; a wedge pins to allow deformation in the closing direction of the bifurcated locking portion fitted from the cavity of the member in the wide gap portion of the bifurcated locking portion protruding, the wedge pin during the predetermined seismic intensity over earthquake is operated is displaced in the narrow gap portion from within the wide gap portion Door opening prevention device characterized by having a an actuation mechanism for preventing the deformation of the closing direction of the bifurcated locking portion Te.   2. The door opening prevention device according to claim 1, wherein the latch is fixed to the rear surface of the door, the receiving member is fixed on the bottom plate of the cupboard body, and an operating mechanism is disposed at a proper rear position of the receiving member. .   2. The door according to claim 1, wherein the latch is fixed on the bottom plate of the cupboard body, the receiving member is fixed to the back surface of the door, and an operating mechanism is disposed at the latch itself or at an appropriate position behind the latch. Opening prevention device. Said actuating mechanism includes the a predetermined seismic intensity more earthquake the wedge pin that is supported by the support bracket so that the amplitude in a predetermined direction at the time, and a weight for holding constant the attitude of the wedge pin during normal The door opening prevention device according to any one of claims 1, 2, and 3.

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