JPH0988401A - Vibration-sensitive lock tool for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously realize simplification of the structure and improvement of responsivity for vibration in a vibration-sensitive lock tool for a door for unopenably locking the door at the time of occurrence of an earthquake. SOLUTION: A lock body 1 is constituted of a rotatably and movably roll-like shaft body 8 and a case 9 for supporting it. A reverse L-shaped drop hole 21 for drop-guiding the shaft body 8 to the case 9 is provided. A waiting seat 22 for supporting the shaft body 8 in a waiting state is provided on the upper end of the drop hole 21. A receiving seat 23 for supporting the shaft body 8 fallen down from the waiting seat 22 is provided on the lower end of the drop hole 21. Both the ends of the shaft body 8 supported by the receiving seat 23 are protruded on both the sides of the case 9, The projection part is made a lock part 12, a lock piece for moving in the open direction is received by the lock part 12 and a door 4 is held closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic lock that holds a door that swings and opens and closes so that it cannot be opened when an earthquake occurs.

[0002]

2. Description of the Related Art As a locking device of this type
Japanese Patent No. 267 is known. This locking device is composed of a seesaw-shaped hooking arm that tilts up and down, and a weight that is mounted on one end of the hooking arm in a normal state and holds the arm in a standby position. When an earthquake occurs, the weight rolls down from one end of the arm, breaking the weight balance of the hanging arm. Therefore, the other end side of the latching arm is tilted downward and hooked on the outer surface of the door to prevent the door from swinging open. As a means for detecting the vibration of an earthquake, a falling ball type (Japanese Patent Publication No. 1-60772) that utilizes the fall of a steel ball attracted by a magnet, or a weight is fixed to the tip of a standing leaf spring In addition, there is a resonance type (Japanese Patent Publication No. 4-64014) which utilizes the fact that a leaf spring oscillates due to external vibration.

[0003]

The above-mentioned locking device for tilting the arm and hooking the hooking portion on the door has a simple structure, but
It takes time to switch from the standby state to the locked state because of the two operations of dropping the weight and tilting the latching arm, and there is a problem in that the response is slow. Since it is necessary to attach the lock tool to the top surface of the top plate of the cabinet, the applicable places are limited,
For example, it cannot be applied to the cabinet on the lower surface side of the kitchen table.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a seismic lock for a door, which locks the door so that it cannot be opened in the event of an earthquake and prevents the stored items from popping out of the cabinet or falling and being damaged. There is. Another object of the present invention is to provide a seismic lock device for a door that can lock and hold the door immediately in response to an earthquake vibration. Another object of the present invention is to easily construct a seismic lock with a small number of parts,
Moreover, it is an object of the present invention to provide a seismic lock device for a door, which can prevent the door from being accidentally switched to a locked state due to a closing impact of the door, a living vibration or the like.

[0005]

A seismic lock device according to the present invention comprises a lock body 1 mounted on an inner surface of an opening of a cabinet 3.
And the lock piece 2 fixed to the inner surface of the door 4. The lock body 1 includes a roll-shaped shaft body 8 that is rollable and a case 9 that supports the shaft body 8. The case 9 is provided with a drop hole 21 that allows the shaft body 8 to be vertically displaced between an upper standby position and a lower lock position. In the upper part of the drop hole 21, a standby seat 22 that supports the shaft body 8 substantially horizontally in a normal state is provided,
At the lower end of the drop hole 21, there is provided a receiving seat 23 for receiving and supporting the shaft body 8 which has fallen from the standby seat 22 in response to external vibration of a predetermined value or more substantially horizontally. The shaft body 8 has a lock portion 12 that abuts and engages with the lock piece 2. The lock portion 12 of the shaft body 8 supported by the seat 23 is arranged so as to intersect with the transition locus of the lock piece 2 accompanying opening and closing of the door 4.

In the normal state, the shaft body 8 is supported by the standby seat 22 above the drop hole 21 and maintains a substantially horizontal posture. When an external vibration of a predetermined value or more acts on the shaft body 8 due to an earthquake, the shaft body 8 springs out from the standby seat 22 and falls into the falling hole 21.
And is horizontally supported by the receiving seat 23. In this state, since the lock portion 12 provided on the shaft body 8 is located on the open position side of the transition locus of the lock piece 2, even if the door 4 is slightly opened and swung, the lock piece 2 is locked by the lock portion 12. The door 4 can be maintained in the closed state because the contact is restricted and the door 4 cannot move further.

At the same time when the shaft body 8 rolls down from the standby seat 22, that is, when the articles stored in the cabinet 3 shift and come into contact with the door 4, the door 4 is locked and held, so that the weight falls. The response speed can be increased as compared with the conventional locking device that switches to the locked state through the two operations of the tilting of the latch arm. The shaft body 8 responds only to the external force in the direction of rolling down, and is almost insensitive to the external force in the direction along the axis center, for example. This means that the lock tool easily responds to an external force in the direction in which the door 4 is opened by the stored article, and the lock tool is less likely to malfunction due to a closing impact of the door 4 or a living vibration. .

Specifically, the case 9 is constructed to include the main frame body 14 having the drop hole 21, and the lock portion 12 of the shaft body 8 is formed.
To the outside of the drop hole 21.

As shown in FIG. 2, when a pair of doors 4, 4 that are opened and closed in a double door structure is arranged on the opening surface of the cabinet 2, the lock body is provided on either the upper wall or the lower wall of the cabinet 3. 1 can be arranged to lock and hold the left and right doors 4 and 4 at the same time. Specifically, the main frame 14 of the lock body 1 is provided with a pair of left and right hole frame portions 16 and 16 each having a drop hole 21, and a guide groove 18 that divides the both hole frame portions 16 and 16 into the left and right. A pair of left and right rolling shaft portions 11, 11 guided and supported by the falling holes 21, 21 on the shaft body 8, and a regulating shaft portion 10 having a diameter larger than that of the rolling shaft portion 11 provided between the both shaft portions 11, 11. And. The left and right end surfaces of the regulation shaft portion 10 are regulated to move in the axial direction by the guide grooves 18, and the rolling shaft portions 11 and 11
The lock portions 12, 12 at both ends of the main frame body 14 are provided on both left and right sides of the main frame body 14 in a protruding manner.

[0010]

1 to 4 show an embodiment of a seismic lock device according to the present invention. The lock tool is a lock body 1 and a lock piece 2.
And a kitchen cabinet 3 shown in FIG. 2, for example.
Apply to The lock main body 1 is arranged on the inner surface of the upper wall of the cabinet 3 near the opening, and the lock pieces 2 are arranged on the inner surfaces of the pair of doors 4 provided in the double door shape near the swinging tips. Each door 4 is swingably supported by a pair of upper and lower slide hinges 5, and a closed state can be maintained by elasticity of a spring built in the hinge. Reference numeral 6 is a handle attached to the outer surface of each door 4.

In FIG. 1, the lock body 1 is composed of a roll-shaped shaft body 8 which is freely rotatable and a case 9 which supports the shaft body 8. The shaft body 8 is made of a metal-turned product in which a central control shaft portion 10 and a pair of rolling shaft portions 11 and 11 projecting from both sides thereof are integrally formed, and the diameter dimension of the control shaft portion 10 is rolled. It is set larger than the diameter dimension of the shaft portion 11. The left-right dimension of the shaft body 8 is set to be sufficiently larger than the left-right dimension of the case 9 (see FIG. 3). Therefore, when the shaft body 8 is supported by the case 9, the protruding portion of the rolling shaft portion 11 does not protrude. Protruding from both left and right sides of. The protruding portion is used as the lock portion 12 to restrict the opening movement of the lock piece 2 when an earthquake occurs.

The case 9 is formed by a lower main frame body 14 formed by press-molding a stainless steel plate and an upper cover 15 respectively. The main frame body 14 has a pair of left and right hole frame portions 16 and 16 projecting to the lower surface side, and a connecting wall 17 that extends continuously forward and backward from the upper ends of the front and rear walls of both hole frame portions 16 and 16. A guide groove 18 is formed between the two hole frame portions 16 and 16 so as to divide the both into left and right. Cover 15
Is a quadrangular plate, and the regulating shaft portion 1 is provided at the center of the plate surface.
An escape hole 19 is formed to avoid contact interference with 0 (see FIG. 1).

The hole frame portions 16 and 16 and the cover 15 that covers the upper opening thereof form a pair of drop holes 21 having left and right side surfaces respectively open. The drop hole 21 is formed in an inverted L shape when viewed from the side, and supports the shaft body 8 so as to be vertically movable between an upper standby position and a lower lock position.
In order to support the shaft body 8 in the standby position, the falling hole 21
The standby seat 22 is formed as a recess on the upper rear side of the. A receiving seat 23 is formed at the lower end of the drop hole 21 to receive the shaft 8 that has fallen from the standby seat 22.

In the shaft body 8, the regulating shaft portion 10 has the guide groove 1
8 is assembled to the main frame 14 in a state of being fitted into the cover 8, and the cover 1
5 is put on and integrated with the case 9. The shaft body 8 incorporated in the case 9 can move up and down along the vertical range of the drop hole 21, and in the normal state, the left and right rolling shaft parts 11 are attached to the standby seat 2
A horizontal posture is maintained by placing it on the 2 (state of FIG. 3).

In the case of an earthquake, vibration exceeding a predetermined value may occur in case 9
As shown in FIG. 4, the shaft 8 bounces from the standby seat 22, falls along the drop hole 21, and is supported by the receiving seat 23. In order to prevent the shaft body 8 from being displaced in the axial center direction at the time of this drop, a regulating shaft portion 10 is provided, and both left and right end surfaces of the regulating shaft portion 10 are contacted with both groove side surfaces of the guide groove 18 (opposite side edges of the hole frame portion 16). Regulated. The lock portion 12 of the shaft body 8 supported by the seat 22 horizontally projects outward of the drop hole 21 and crosses the opening locus of the lock piece 2 left and right.

The lock piece 2 is formed by projecting a J-shaped hook arm 26 from the mounting base 25 (see FIG. 4).
The locking portion of the protruding end of 6 is located below the lock portion 12 of the shaft body 8 at the standby position, and the lock portion 12 at the lock position is provided.
Attach it to the door 4 so that it intersects with. Further, the case 9 is arranged such that the left and right centers of the guide grooves 18 face the closing gaps of the pair of doors 4, and the connecting wall 17 of the main frame 14 and the cover 15 are screwed from the lower surface side with screws. Fastened and fixed to the upper wall of the cabinet 3.

According to the seismic lock having the above-described structure, the shaft body 8 receives the seat 2 of the drop hole 21 at the same time when an earthquake occurs.
Since the open movement of the lock piece 2 is prevented by falling into 3 and the door 4 is held and fixed in the closed state, it is possible to reliably prevent the stored articles in the cabinet 1 from popping out or falling and being damaged. In addition, the main frame body 14, the cover 15, and the shaft body 8
Since the lock body 1 is configured by the three parties, the structure of the seismic lock device can be simplified and the manufacturing cost thereof can be reduced, and the left and right doors 4 can be simultaneously held by the lock body 1 to prevent the lock device from being locked. The number used can be reduced.

After the earthquake is over, the shaft 8 is placed in the waiting seat 2
By returning to 2, the lock can be reset to the unlocked state. More specifically, as shown by an imaginary line in FIG. 4, the operation piece P is inserted from the closing gap of the door 4, the recess 27 at the tip of the operation piece P is circumscribed to the regulation shaft portion 10, and the entire shaft body 8 is guided along the guide groove 18. By pushing up, rolling shaft 1
1 can be placed on the waiting seat 22. The operation piece P may be a plate material that can pass through the closing gap of the door 4, and for example, metal tableware such as a grip of a fork or a spoon or a knife can be used.

A part of the above-mentioned seismic lock can be modified and implemented as described below.

As shown in FIG. 5 (a), the falling hole 21 is formed by a slanting straight hole, a standby seat 22 is formed in the upper end thereof, and a lower end is formed as a receiving seat 23. As shown in FIG. 5B, the lower end of the drop hole 21 is recessed toward the front side of the case 9 to form a seat 23, and the dropped shaft body 8 jumps out of the seat 23 due to intermittent external vibration. Prevent.

As shown in FIG. 6 (a), a pair of lock portions 12 are formed to have a diameter larger than that of the rolling shaft portion 11, and the opposing side surfaces thereof are abutted and regulated by the outer surface of the hole frame portion 16 to form a shaft. It is possible to regulate the displacement movement of the body 8 in the axial direction. In this case, the regulation shaft portion 10 can be omitted. As shown in FIG. 6 (b), the entire shaft body 8 is formed of a round shaft having the same diameter, and two retaining rings 2 instead of the regulating shaft portion 10 are formed.
8 is externally mounted on the shaft midway portion.

As shown in FIG. 7, the case 9 is formed by integrally molding a pair of hole frame parts 16 having the drop holes 21 and a cover part 15a connecting the upper parts of both hole frame parts 16 together. . Further, the shaft body 8 is formed of steel, and the magnet 3 is attached to the receiving seat 23.
0 is embedded and fixed. Thus, the dropped shaft body 8 is attracted by the magnet 30 to prevent it from springing out. However, in this case, the shaft 8
Is divided into a plurality of parts, and these divided parts are formed into the falling holes 21.
After inserting it in, connect it with screws.

In addition to the above, the main frame 14 can be formed by using an extrusion mold material. If necessary, it can be formed of a plastic molded product as illustrated in FIG. The lock portion 12 does not need to be formed by using the rolling shaft portion 11, and the regulation shaft portion 10 may also serve as the lock portion 12. In this case, the lock piece 2 moves along the guide groove 18 along the main frame 1
4 is arranged so as to traverse back and forth, and when the shaft body 8 rolls down to the lock position, the restricting shaft portion 10 restricts the open movement of the lock piece 2 by abutting. In some cases, the lock body 1 is arranged on the inner side wall of the cabinet 3 so that the central axis of the shaft body 8 is orthogonal to the panel surface of the closed door 4, and the lock shaft 1 of the restricting shaft portion 10 protruding to the outer surface of the hole frame portion 16 is arranged. The lock piece 2 can be contact-regulated at the rear end surface. The seismic lock device can be provided corresponding to one door 4, and in this case, the lock body 1 is arranged on any one of the upper wall, the bottom wall and the side wall of the opening inner surface. The shaft body 8 may be formed of a polygonal shaft having a hexagonal shape or more, or a shaft having a non-circular cross section, instead of being formed of a round shaft.

[0024]

According to the seismic lock device of the present invention, the open movement of the lock piece 2 is regulated by utilizing the fact that the shaft body 8 rolls down from the standby position to the lock position. Since it is held and fixed in the closed state, it is possible to reliably prevent the stored articles from jumping out of the cabinet 3 or falling and being damaged when an earthquake occurs. Since the opening movement of the lock piece 2 can be prevented only by the dropping operation of the shaft body 8, the response speed for switching to the lock state can be improved, and the door 4 can be reliably locked and fixed by immediately responding to the vibration of the earthquake. Since the vibration is detected by the roll-shaped shaft 8 rolling in the circumferential direction, it is sensitive to an external force in the direction in which the door 4 opens, but hardly operates against an external force in other directions. The locking tool is obtained, and the seismic locking tool with excellent usability can be obtained in which the shaft body 8 is not accidentally switched to the locked state due to the closing impact of the door 4 or the vibration of life.

[Brief description of drawings]

FIG. 1 is a perspective view of a seismic lock.

FIG. 2 is a front view of a cabinet showing an example of using a seismic lock.

FIG. 3 is a front view of a seismic lock.

FIG. 4 is a side view of the seismic lock.

FIG. 5 is a side view of a case showing a modified example of a drop hole.

FIG. 6 is a front view showing a modified example of the shaft body.

FIG. 7 is a perspective view showing a modified example of the case.

[Explanation of symbols]

 1 Lock Main Body 2 Lock Piece 3 Cabinet 4 Door 8 Shaft 9 Case 12 Lock Part 21 Drop Hole 22 Standby Seat 23 Seat

Claims (3)

[Claims] 1. A lock body (1) mounted on an inner surface of an opening of a cabinet (3) and a lock piece (2) fixed on an inner surface of a door (4), wherein the lock body (1) includes a roll-shaped shaft body (8) which is rollable. , A case 9 for supporting the shaft body 8. The case 9 is provided with a drop hole 21 that allows the shaft body 8 to be vertically displaced between an upper standby position and a lower lock position. A standby seat 22 for supporting the shaft body 8 in a substantially horizontal state is provided in the upper part of the shaft, and the shaft body 8 that has fallen from the standby seat 22 due to external vibration of a predetermined value or more is substantially horizontal at the lower end of the drop hole 21. A bearing seat 23 for receiving and supporting is provided, the shaft body 8 has a lock portion 12 that abuts and engages with the lock piece 2, and the lock portion 12 of the shaft body 8 supported by the bearing seat 23 is provided on the door 4. A seismic lock for a door that is arranged so as to intersect the transition locus of the lock piece 2 associated with opening and closing. 2. The seismic lock for a door according to claim 1, wherein the case 9 includes a main frame body 14 having a drop hole 21, and the lock portion 12 of the shaft body 8 projects outward of the drop hole 21. Ingredient 3. A pair of doors 4, 4 that are opened and closed in a double door shape are arranged on the opening surface of the cabinet 2, and the lock body 1 is arranged on either the upper wall or the lower wall of the cabinet 3. The main frame body 14 of the lock body 1 includes a pair of left and right hole frame portions 16 and 16 each having a drop hole 21, and both hole frame portions 16 and 1.
The shaft body 8 is provided with a pair of left and right rolling shaft portions 11 and 11 guided and supported by the drop holes 21 and 21, and between the shaft portions 11 and 11. It has a regulating shaft portion 10 having a diameter larger than that of the provided rolling shaft portion 11, and the left and right end faces of the regulating shaft portion 10 are axially regulated by the guide grooves 18 so that both sides of the rolling shaft portions 11 and 11 can be regulated. The seismic lock for a door according to claim 2, wherein the end lock portions 12, 12 are provided on both left and right sides of the main frame body 14.