JPH0978926A - Earthquake resistant lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a door to be freely opened and closed and be kept closed without the need for any special locking and unlocking operations under normal conditions and to hold the door unopenable in an earthquake by engaging latches. SOLUTION: This earthquake resistant lock device has a lock body 5 with a pair of latches 10. The lock body 5 is provided on the interior wall of an opening in a cabinet. The device has a catch 6 which locks to and unlocks from the latches 10 and which is provided on the inner surface of a double- leafed hinged door. A magnet 11 and a detecting element 12 which is attracted and held by the magnet 11 are provided inside the lock body 5. The detecting element 12 is formed of a steel ball which, when an external vibration not less than a predetermined value works on the lock body 5, leaves the magnet 11 and drops. The dropped detecting element 12 drops into a lock hole 16 provided between the inner ends of the latches 10 to prevent the latches 10 from moving in backward. Thus the catch 6 and the latches 10 are kept engaged with each other to lock the door 2 in a closed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic lock device for a door, which has a latch function for locking the door so that it cannot be opened when an earthquake occurs.

[0002]

2. Description of the Related Art For example, a door of a kitchen cabinet is provided with a latch lock for holding the door closed. With this type of latch lock, the door can be opened and closed easily without the need for locking and unlocking. However, in the event of an earthquake, etc., the door will open and the stored items will fall and scatter. In order to avoid such a situation, there is a latch lock that can be unlocked only when the door is opened (Japanese Utility Model Publication No. 59-27508).

Japanese Patent Publication No. 2-41267 discloses a seismic device for a door that locks and holds the door in the event of an earthquake.
Using the fact that the weight rolls down due to the occurrence of an earthquake, the door is fixed so that it cannot be opened. In the present invention, a magnet and a ball attracted to the lower surface of the magnet are used as an earthquake vibration detecting element.
It is known from the 0772 publication.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention
It takes time to change the posture from the standby position to the locked state, and the response speed is low. It is necessary to provide a latch lock for closing the door in a normal state separately from the seismic resistant device for the door, which increases the cost of equipment attached to the door. Since it is necessary to attach the seismic resistant equipment for the door to the top surface of the top plate of the cabinet, there is also a disadvantage that the application place is limited.

The object of the present invention is to prevent the contents from popping out of the cabinet by locking the door so that it cannot be opened in the event of an earthquake, while the door can be opened and closed easily without the need to perform the locking / unlocking operation in the normal state. The purpose is to provide a seismic lock device that can prevent such a situation. SUMMARY OF THE INVENTION An object of the present invention is to provide a seismic lock device that has a simple structure and can be provided at a relatively low cost, and that can immediately lock and hold a door in response to an earthquake vibration. It is an object of the present invention to provide a seismic locking device that can be mounted anywhere on the inner wall of a cabinet, and therefore has no restrictions on the application site and has excellent versatility. The purpose of the present invention is
An object of the present invention is to provide an earthquake-resistant lock device that can release the lock from the outer surface of the door and easily reset the lock after an earthquake.

[0006]

As shown in FIG. 2, the seismic lock device of the present invention engages with a lock body 5 and a latch body 10 provided on the lock body 5 to hold and fix the door 2 at a closed position. It has a catch 6. As shown in FIG. 1, the lock body 5 has a housing 9, a latch body 10 supported by the housing 9 so as to be able to move out and out, and a spring 20 for urging the latch body 10 to advance outward of the housing 9. . Inside the housing 9, the magnet 11 and the magnet 11
A detection body 12 that is attracted to and held by and is separated from the magnet 11 and falls when it receives external vibration of a predetermined value or more, and a reset mechanism that re-adsorbs the detection body 12 to the magnet 11. Lock hole 16 for receiving the detector 12 separated from the magnet 11
Are provided so as to include the retreat area of the latch body 10. Then, the detection body 12 that has fallen into the lock hole 16
The latch body 10 is prevented from moving in and out.

When an external vibration of a predetermined value or more acts on the detecting body 12 due to an earthquake, the detecting body 12 shakes off the magnetic force and separates from the magnet 11, and falls into the lock hole 16 below. In this state, since the detection body 12 occupies the retreat area of the latch body 10, the latch body 10 cannot retreat or move. That is, the door 2 cannot be opened. In the normal state, the detection body 12 is attracted to the magnet 11 and positioned above the lock hole 16, so that the latch body 10 can freely move in and out of the lock hole 16 side.

Specifically, a lock holding magnet 22 for adsorbing and holding the fallen detection body 12 is provided facing the lock hole 16, and the detection hole 12 is adsorbed and held by the magnet 22 so that the lock hole is locked. The detector 12 that has fallen to 16 is prevented from accidentally jumping out of the lock hole 16 due to vibration or shock, and the locked state is maintained until the earthquake ends.

As shown in FIGS. 1 and 3, the reset mechanism includes an operation tool 24 for receiving and supporting the detection body 12 at the inner bottom of the lock hole 16, and a spring 29 for pushing down the operation tool 24 to urge it. The operation tool 24 has a lower standby position,
The detection body 12 is lifted and supported by the housing 9 so as to be displaceable between the detection body 12 and an upper reset position where the magnet 11 is re-adsorbed by the magnet 11.

The latch body 10 can be in a form of reciprocating slide with respect to the catch 6 to engage and disengage, or a form of reciprocating slide and swinging back and forth to engage and disengage. In the former case, as shown in FIGS. 1 and 3, the latch body 10 is supported by the housing 9 so as to be slidable and retractable, and the advance limit is restricted by the pin 21 that penetrates the latch body 10 in a cross shape. Latch body 1
A pin 21 receives and supports one end of a spring 20 arranged inside the zero. In the latter form, as shown in FIG. 6, the first and second pins 35, which fix the latch body 10 to the housing 9,
A second pin 21 receives and supports one end of a spring 20 arranged inside the latch body 10 so as to be slidable and retractable at 21 and swingable back and forth around a first pin 35.

When the pair of doors 2 and 2 are provided in a double door shape, they can be captured and fixed by one lock body 5. The lock body 5 is arranged on one of the upper and lower walls facing the opening of the cabinet 1, and the pair of left and right doors 2, 2 that open and close the opening of the cabinet 1 are provided with catches 6, 6. Inside the housing 9, there is a catch 6 for each door 2.2.
A pair of latch bodies 10 engaging with 6 are provided back to back, and a lock hole 16 is provided between the inner ends of both latch bodies 10.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIGS. 1 to 5 show Embodiment 1 of an earthquake-resistant locking device according to the present invention. This seismic lock device is applied to, for example, a kitchen cabinet 1 as shown in FIG. 2, that is, a cabinet provided on the lower surface of a kitchen table in a kitchen, and the front surface of the opening can be opened and closed by a pair of left and right doors 2.2. Each door 2 is swingably supported by a pair of upper and lower slide hinges 3, and in the closed state, the swinging tips are provided in a double-door shape with the left and right sides being adjacent to each other. Reference numeral 4 denotes a handle mounted on the outer surface of each door 2.

The seismic lock device comprises a lock body 5 and a catch 6 as shown in FIG. 2. The lock body 5 is fixed to the left and right center of the inner surface of the upper wall of the cabinet 1 and the upper end of the inner surface of each door 2 is caught. Fix 6 In FIG. 3, the lock body 5 uses the lid 8 and the housing 9 as a support body, and a pair of left and right latch bodies 10 are provided inside the lock body 5, and the magnet 1
1, a detection body 12, a magnet 22 for holding a lock, and a reset mechanism for resetting the detection body 12 are incorporated.

The housing 9 is made of a rectangular parallelepiped block-shaped plastic molded product, and a bowl-shaped chamber 15 having an open top is provided at the center thereof, and a lock hole 16 for receiving the detector 12 is provided on the inner bottom of the chamber 15. The diameter dimension of the lock hole 16 is slightly larger than the diameter of the detector 12. A knob groove 17 having a convex cross section is provided on the front surface of the housing 9 along the vertical axis, and the knob groove 17 communicates with a chamber 15 and a lock hole 16 by a slit 18. The knob groove 17 and the slit 18 have an operation tool 24 for resetting the detection body 12.
Is incorporated.

A guide hole 19 is provided through the housing 9 from one side surface to the other side surface so as to intersect with the lock hole 16, and a pair of left and right latch bodies 10 can be slid in and out of the guide hole 19. Guide and support. The latch 10 is made of a stainless steel shaft whose outer end is rounded into a hemispherical shape, and has a spring hole 10a along the shaft center.
A slide groove 10b is formed in a penetrating shape in the middle of the shaft. A compression coil type spring 20 is inserted from the inner end side into the spring hole 10a.
, The latch body 10 is inserted into the guide hole 19 from the flat inner end side, and the pin 21 inserted from the rear surface side of the housing 9 is inserted into the slide groove 10b.
0 is integrated with the housing 9.

At this time, one end of the spring 20 is received by the pin 21, and the latch body 10 is urged to advance toward the outside of the housing 9. The pin 21 also serves as a stopper,
It abuts on the inner end of the slide groove 10b to define the limit of outward movement of the latch body 10. The left and right latch bodies 10 can be respectively moved in and out of the housing 9 against the urging force of the spring 20, and the lock hole 16 is provided so as to include this withdrawn area.

The lid 8 is made of a quadrangular plate-shaped plastic molded product that matches the planar shape of the housing 9, and a magnet 11 is press-fitted and fixed in a bottomed hole provided in the center of the plate surface. The magnet 11 is formed in a cylindrical shape and magnetized so that the N pole and the S pole are located on the upper and lower end surfaces. Spring receiving holes are provided on the left and right of the lower surface of the front portion of the lid 8.

The detector 12 is made of a magnetic ball, for example, a steel ball, and is adsorbed and held on the lower surface of the magnet 11 in the normal state shown in FIG. When a vibration of a predetermined value or more acts at the time of occurrence of an earthquake, the detection body 12 floats due to its own motion inertial force or static inertial force, shakes off the magnetic force of the magnet 11 and separates and falls as shown by an imaginary line. A large-diameter chamber 15 is provided to allow the floating of the detector 12. Magnet 11
The diameter of is set to be smaller than the diameter of the detection body 12 to prevent the detection body 12 that is about to be separated from the magnet 11 from being re-adsorbed at the peripheral edge of the magnet 11. Lower surface of magnet 11 and detector 1
It is also possible that the detector 1 is separated from 2 by a thin bottomed wall.
It helps prevent re-adsorption of 2.

The detector 12 that has fallen apart from the magnet 11 falls into the lock hole 16 and is attracted and fixed by the lock holding magnet 22 embedded in the inner bottom thereof. Therefore, even when the external vibration is intermittently received, the detection body 12 is prevented from bouncing out of the lock hole 16.

An operating tool 24 is provided for adsorbing and holding the detection body 12 that has fallen into the lock hole 16 to the magnet 11 again. As shown in FIG. 3, the operation tool 24 is provided with an upward circular circular seat 26 at the lower inner end of a narrow arm 25, and a knob 27 having a convex shape in a plan view projectingly provided on the front end of the upper end of the arm 25. The knob 27 is formed of a plastic molded product having spring-receiving bosses 28, 28 projecting downward from the left and right ends thereof. By inserting and mounting the knob 27 and the arm 25 into the knob groove 17 and the slit 18 from the upper surface side of the housing 9, the entire operation tool 24 can slide up and down along the knob groove 17 and the slit 18, and the left and right bosses 28.・ It is pushed down and urged by springs 29 ・ 29 loaded from above in 28. The upper end of each spring 29 is received by a spring receiving hole of the lid 8 to regulate the displacement movement. In the normal state, the seat 26 is located at the inner bottom of the lock hole 16. Therefore, the detection body 12 that has fallen into the lock hole 16 is supported by the receiving seat 26 as shown in FIG.

As shown in FIGS. 4 and 5, the catch 6 is made of a metal plate made by bending a stainless steel plate material into an L shape.
One surface wall is fixed to the inner surface of the door 2 with a screw, and the other engagement wall 6a is projected orthogonally to the door 2. Engagement holes 30 are penetratingly formed in the plate surface of the engagement wall 6a. As shown in FIG. 1, when the door 2 is closed, the engagement hole 30 engages with the latch body 10 in an externally fitted manner to hold the door 2 closed. Door 2
When the pulling operation is performed in the direction to open the latch 6, the latch body 10 retreats against the biasing force of the spring 20 by the action of the component force of the engaging hole 30 as shown in FIG.
The engagement state with 0 can be released. That is, it is possible to freely open and close the door 2 and maintain the closed state without performing the locking / unlocking operation. The lock body 5 is attached to the cabinet 1 with a screw 32 so that the knob 27 is located at the center of the closing gap between the left and right doors 2, and the catch 6 has the engaging wall 6a with a small gap from the left and right side walls of the housing 9. The doors 2 are attached so as to face each other.

When an earthquake occurs, vertical or horizontal vibration acts on the housing 9. The detection body 12 that has received this vibration moves relative to the magnet 11 by a static inertial force or a motional inertial force, shakes off the magnetic force, and falls down. The dropped detector 12 falls into the lock hole 16 and is attracted and held by the magnet 22 via the seat 26. Even if an external force is applied to the latch body 10 in this state, the detection body 12 is in the way, so that the left and right latch bodies 10 are
Can't move in. Therefore, the door 2 can be held and fixed in the closed state. The detection body 12 is separated from the magnet 11 by the force of the chamber 15
May collide with the inner surface of the. However, since the chamber 15 is formed in a bowl shape, the detection body 12 finally has the lock hole 1
It is possible to prevent the latch body 10 from moving back and forth by dropping to 6.

After the end of the earthquake, the operation tool 24 is operated to return the detector 12 to the standby state. This reset operation is shown in FIG.
As shown in, the strip-shaped operation piece P is inserted from the outer surface side of the door into the closing gap of the doors 2 and 2, and is operated upward as indicated by the arrow. The tip of the operation piece P is applied to the lower surface of the knob 27 to push up the entire operation tool 24 against the biasing force of the spring 29. As a result, the detection body 12 is lifted to the upper side of the chamber 15 while being supported by the seat 26, and the magnet 11
Are re-adsorbed by. Since the detection body 12 is attracted to the magnet 11 when the detection body 12 approaches the inner surface of the lid 8, the push-up amount of the operation tool 24 can be small. The operation piece P may be any plate-like material that can pass through the closing gap of the door 2, and for example, metal tableware such as a grip of a fork or spoon or a knife can be used.

(Embodiment 2) FIGS. 6 to 8 show Embodiment 2 relating to the seismic lock device of the present invention. The engaging / disengaging structure of the latch body 10 with respect to the catch 6 is different from that of Embodiment 1. The latch body 10 here is formed of a stainless steel shaft body having a quadrangular cross section, and an engagement guide surface 34 inclined toward the rear surface side is provided at the outer end thereof. The latch body 10 has a pair of front and rear slide grooves 10b that pass through the shaft midway in the vertical direction.
10c is provided, the first and second pins 21 and 35 are respectively inserted into both grooves 10b and 10c, and the entire protrusion of the latch body 10 is slidably protruded and retracted by both pins 21 and 35 to limit the outward protrusion limit. And guide you. In one slide groove 10b,
A spring hole 10a is provided in which the spring 20 is housed, as in the first embodiment. The latch body 10 which receives the biasing force of the spring 20 tries to rotate rearward of the housing 9 around the first pin 35 in the eccentric position, but this force is generated by the rear wall of the guide hole 19. Take it. Therefore, in the normal state, the latch body 10 can maintain the posture parallel to the door 2.

When the door 2 in the closed state is opened, the latch body 10 swings forward about the pin 35 while resisting the biasing force of the spring 20, as shown by the imaginary line in FIG. The outer end thereof enters into the housing 9 to release the engagement with the engagement hole 30 provided in the catch 6. Therefore, also in this lock device, the door 2 can be opened and closed without the need to perform the locking / unlocking operation, and the closed state can be maintained. Latch body 10
In order to allow the forward swing of the guide hole 19, the guide hole 19 is formed in a substantially pentagonal shape in a plan view, and an escape portion 19a is provided on the front half side thereof.

When the latch body 10 swings to the front side, its inner end portion enters into the lock hole 16. Therefore, when the detection body 12 falls into the lock hole 16, the latch body 1
0 cannot contact the detection body 12 and cannot swing, and can hold the door 2 in a closed state. Since other configurations are substantially the same as those of the first embodiment, the same members are designated by the same reference numerals and the description thereof will be omitted.

(Embodiment 3) FIG. 9 shows Embodiment 3 of the seismic lock device according to the present invention, in which only one door 2 is the lock target, and further the lock body 5 is on the door 2 side. The catch 6 is provided on the cabinet 1 side.
In this case, the guide hole 19 is provided only on one side of the housing 9 facing the catch 6. In addition, a tubular operation unit 37 that penetrates the door 2 in and out is provided, and an operation lever 38 provided therein resets the operation tool 24. The operation lever 38 can be swung up and down around the pin 39, and an operation piece 40 is provided at its outer end. The catch 6 is formed of a plastic molded product.

If the lock body 5 is provided on the side of the door 2 in this way, when the door 2 collides with the cabinet 1,
The detection body 12 easily falls from the magnet 11. However, since it can be easily reset by simply pushing down the operation piece 40, it is suitable for being applied to the door 2 which is not frequently opened and closed.

In addition to the above embodiments, the seismic lock device can be mounted on the bottom wall of the cabinet 1 for use. The detection body 12 and the magnet 11 can be in the form of being attracted in a line contact or surface contact state. The detection body 12 can be formed of a polyhedron instead of being formed of a sphere. The magnet 22 may be embedded in the peripheral side surface of the lock hole 16.

[0030]

In the seismic-resistant locking device of the present invention, the detection body 12 that has fallen apart from the magnet 11 when an earthquake occurs is caused to fall into the lock hole 16, so that the latch body 10 is displaced inward of the housing 9. Blocked and allowed door 2 to be closed and fixed. According to such an anti-seismic locking device, it is not necessary to perform the locking / unlocking operation in the normal state, and the door 2 can be easily opened and closed. On the other hand, in the event of an emergency such as an earthquake, the door 2 can be locked so that it cannot be opened to prevent the stored items from popping out or falling.
Easy to use.

At the same time that the detection body 12 falls off the magnetic force of the magnet 11 and falls, at the same time, the detection body 12 falls into the lock hole 16 and prevents the latch body 10 from moving in and out. 2 can be securely locked. Since the resetting operation tool 24 is provided in the housing 9 and can be operated by the operation piece P inserted from the closing gap of the door 2, the detection body 12 is re-adsorbed to the magnet 11 after the earthquake ends. The locked state can be released easily.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an earthquake-resistant locking device according to a first embodiment.

FIG. 2 is a front view of a cabinet showing an application example of the earthquake-resistant locking device according to the first embodiment.

FIG. 3 is an exploded perspective view of the seismic lock device according to the first embodiment.

FIG. 4 is a sectional view taken along line AA in FIG.

5 is a cross-sectional view taken along the line BB in FIG.

FIG. 6 is a cross-sectional plan view of the seismic lock device according to the second embodiment.

FIG. 7 is a sectional view taken along line CC in FIG. 6;

8 is a sectional view taken along line DD in FIG.

FIG. 9 is a vertical sectional side view of an earthquake-resistant lock device according to a third embodiment.

[Explanation of symbols]

 1 Cabinet 2 Door 5 Lock Main Body 6 Catch 9 Housing 10 Latch Body 11 Magnet 12 Detecting Body 16 Lock Hole 20 Spring 24 Operating Tool

Front page continuation (72) Inventor, Yuzuru Sato, No. 12 Mikitani Kitanomachi, Higashi-Osaka City, Osaka Prefecture Shin-Kansai Bearing Co., Ltd.

Claims (6)

[Claims] 1. A lock body (5) and a catch (6) which engages with a latch body (10) provided on the lock body (5) to hold and fix the door (2) in a closed position, the lock body (5) and a housing (9), It has a latch body 10 supported by a housing 9 so as to be able to move out and back, and a spring 20 for urging the latch body 10 to advance outward of the housing 9. Inside the housing 9, a magnet 11 and a magnet are provided. When the magnet 11 is attracted to and held by the magnet 11 and receives an external vibration of a predetermined value or more, the magnet 12 separates from the magnet 11 and falls.
1 is provided with a reset mechanism for re-adsorption, and a lock hole 1 for receiving the detection body 12 separated from the magnet 11.
6 is provided so as to include the retreat area of the latch body 10, and the detection body 12 that has fallen into the lock hole 16 is
Seismic locking device that is configured to prevent the retreat movement of the. 2. The seismic lock device according to claim 1, wherein a lock holding magnet 22 for holding the fallen detection body 12 by suction faces the lock hole 16. 3. The reset mechanism includes an operation tool 24 for receiving and supporting the detection body 12 at the inner bottom of the lock hole 16, and a spring 29 for pushing down and urging the operation tool 24, and the operation tool 24 is provided below. The housing 9 is supported so as to be displaceable between a standby position and an upper reset position where the detection body 12 is lifted up and re-adsorbed to the magnet 11.
Seismic locking device described. 4. A latch body (10) is slidably supported in a housing (9), and a forward limit is restricted by a pin (21) penetrating the latch body (10) in a cross shape, and a spring (20) arranged inside the latch body (10) is restricted. 4. The seismic lock device according to claim 3, wherein one end is received and supported by a pin 21. 5. A latch body (10) is supported by first and second pins (35, 21) fixed to a housing (9) so as to be able to slide in and out and swingable back and forth around the first pin (35). The seismic lock device according to claim 3, wherein one end of the spring 20 disposed inside the latch body 10 is received and supported by the second pin 21. 6. The lock main body 5 is disposed on either one of the upper and lower walls facing the opening of the cabinet 1, and the cabinet 1
A pair of left and right doors 2 and 2 for opening and closing the openings of the doors 2 and 2 are provided with catches 6 and 6, respectively. The seismic lock device according to claim 4 or 5, wherein 10 are provided back-to-back, and a lock hole 16 is provided between the inner ends of the both latch bodies 10.