JPH11280320A - Earthquake-resistant lock device for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake-resistant lock device for a door which is simple in the structure and securely works in an earthquake and further which keeps the door in a closed state and prevents the contents of a cabinet from dropping and being scattered in an earthquake. SOLUTION: A fixing member 2 is fitted in the inside of a cabinet 1, and a latch part 3 is provided at the front end of the fixing member 2 and a latch member 4 is provided to forwardly slide to the diagonal lower side owing to vibration of the cabinet 1 and brought to a stop and kept in the lower position. An engaging member 6 provided with an engaging part 5 in which the latch part 3 of the latch member 4 positioned in the lower part is provided at the rear face of the door 10 of the cabinet 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-seismic locking device for a door in a cabinet, and more particularly to an anti-seismic locking device for a door which holds a door in a closed state in the event of an earthquake and prevents the contents stored in a cabinet from falling and being scattered. Related to a lock device.

[0002]

2. Description of the Related Art Conventionally, an anti-seismic lock device for a door as shown in FIG. 7 has been proposed. This seismic locking device for a door is used for a cabinet 1 having a rectangular body and a door 10 hinged to an opening of the rectangular body. And a latch member 4 pivotally attached to the fixed member 2 in the rectangular body and swingable in the front-rear direction.

[0003] The fixing member 2 is a door 1 on the back surface of the rectangular top plate 1a.
It is fixed to the 0 side. The latch member 4 includes a swing shaft 30 pivotally attached to the fixed member 2, a swing plate 31 swinging about the swing shaft 30, and a bulge provided at a rear end of the swing plate 31. And a latch section 3 provided at the front end of the swinging plate 31. The engaging member 6 is formed in a substantially L-shape, and one piece is tightly fixed to the back surface of the door 10, and the other piece having the engaging portion 5 at the tip portion is protruded from the back surface of the door 10. The door 10 is fixed to a rectangular body by a magnet when closed. Further, a steel ball 33 that pushes the bulging portion 32 downward is provided inside the fixing member 2.

In such an anti-seismic locking device for a door, in a normal state, the swing plate 31 balances the tilt portion of the latch portion 3 downward, so that the door 10 can be freely opened and closed. If an earthquake occurs when the door 10 is closed, the steel ball 33 pushes the bulging portion 32 due to the vibration of the cabinet 1, and the rocking plate 31 rocks, and the latch portion 3 rotates upward and is held. You. Then, when the door 10 is slightly opened to open due to the vibration of the earthquake, the engaging portion 5 moves in a substantially horizontal direction and is locked to the latch portion 3 so that the opening of the door 10 can be prevented and locked.

[0005] In such an earthquake-resistant lock device for a door, the door 10 is held slightly opened in the event of an earthquake to prevent the stored items in the cabinet 1 from falling and being scattered.

[0006]

However, in the conventional door seismic lock device, the rocking plate 31 is rocked by the steel ball 33, and the latch portion 3 is aligned with the engaging portion 5 and locked. Therefore, the structures of the fixing member 2 and the latch member 4 are complicated, the cost is high, and the design for positioning the latch portion 3 is difficult.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an anti-seismic lock device for a door which has a simple structure and operates reliably during an earthquake.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a fixing member 2 is mounted inside a cabinet 1 and a latch portion 3 is provided at a front end of the fixing member 2.
And a latch member 4 that slides obliquely forward and downward due to the vibration of the cabinet 1 and is stopped and held at a lower position, and an engaging portion 5 with which the latch portion 3 of the latch member 4 located at the lower position is locked. Is provided on the back surface of the door 10 of the cabinet 1.

In such an earthquake-resistant lock device for a door, the latch member 4 is held at an upper position by the fixing member 2 in a normal use state, so that the door 10 can be freely opened and closed.
When an earthquake occurs when the door 10 is closed,
Due to the vibration of the cabinet 1, the latch member 4 slides obliquely forward and downward and is stopped and held at the lower position, and the latch portion 3 at the front end of the latch member 4 is engaged with the engaging portion 5 of the engaging member 6 fixed to the back surface of the door 10. With the door 10 slightly opened, the door 10 is held and locked so as not to open. To release the lock, the door 10 is pushed back, so that the engaging portion 5 pushes back the latch portion 3, and the latch member 4 is slid up to return to the upper position.

According to a second aspect of the present invention, in the first aspect of the present invention, the fixed member has an inclined surface on which the latch member slides, and the latch member is provided on both sides of the inclined surface. And a guide piece 8 that guides the guide is provided upright.

In such an anti-quake locking device for a door, the latch member 4 slides down on the inclined surface 7 in a forward and downward direction on the inclined surface 7 while being guided by the two guide pieces 8 erected on both sides of the inclined surface 7. The latch 3 is locked to the engaging portion 5 from obliquely above, and the door 1 is locked.
Lock 0.

According to a third aspect of the present invention, in the second aspect of the present invention, a horizontal portion 9 is provided on the upper end or the lower end of the inclined surface 7 for holding the latch member 4 at an upper position. It is characterized by becoming.

In such an earthquake-resistant lock device for a door, the latch member 4 placed on the horizontal portion 9 falls from the horizontal portion 9 due to the vibration of the cabinet 1, thereby causing the latch member 4.
Slides down the inclined surface 7.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the interval between the two guide pieces 8 is formed to be wider than the lateral width of the latch member 4 and the width of the latch member 4 in the lateral direction is increased. The latch member 4 is formed so as to drop from the horizontal portion 9 by movement.

In such an earthquake-resistant locking device for a door, since the space between the two guide pieces 8 is wider than the lateral width of the latch member 4, the lateral vibration of the cabinet 1 causes the latch member 4 to move in the lateral direction, and When the member 4 falls from the horizontal portion 9, the latch member 4 slides down the inclined surface 7.

According to a fifth aspect of the present invention, in the second to fourth aspects of the present invention, both guide pieces 8 are formed so as to be narrower so that the latch member 4 can be clamped toward the back. doing.

In such a door seismic lock device, when the lock is released, the latch member 4 at the lower position slides up by being guided between the two guide pieces 8 whose distance is narrower toward the back, and moves upward at the upper position. Since the latch member 4 is held between the guide pieces 8, the latch member 4 can be always kept at the fixed upper position.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door seismic lock device according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a longitudinal sectional view of a main part showing an operating state of a door seismic lock device according to an embodiment of the present invention. Also,
FIG. 2 is a perspective view showing an earthquake-resistant lock device for the door of the above. FIG. 3 is a perspective view showing a cabinet having the above-mentioned door seismic lock device.

As shown in FIGS. 1 to 3, this door seismic lock device has a fixing member 2 attached inside a cabinet 1, the fixing member 2 having a latch portion 3 at a front end, and a cabinet 1. An engaging member provided with a latch member 4 that slides obliquely forward and downward and is stopped and held at a lower position by the vibration of the latch member 4 and the latch portion 3 of the latch member 4 located at the lower position is locked. 6 is provided on the back surface of the door 10 of the cabinet 1. An inclined surface 7 on which the latch member 4 slides is provided on the fixing member 2, and guide pieces 8 for guiding the latch member 4 are provided upright on both sides of the inclined surface 7. Further, a horizontal portion 9 is provided at a lower end portion of the inclined surface 7 for mounting the latch member 4 and holding the latch member 4 at an upper position.

The fixing member 2 has a bottom portion and both side portions, is formed in a substantially U-shape in vertical section with an opening facing upward, and the front surface is flush with the side surface of the opening of the cabinet 1. It is provided at an appropriate position near the door 10 on the back surface of the top plate 1a. The bottom is formed of a slide portion 11 and a stepped portion 12 at the front end of the slide portion 11. Slide part 1
1 has an inclined surface 7 whose upper surface is higher toward the back,
The bottom surface of the step-down portion 12 forms a horizontal portion. Both side portions are formed by guide pieces that stand upright on both ends of the slide portion 11 and the step-down portion 12 and fixing plates 13 that extend outward from the upper ends of the guide pieces. I have. The fixing plate 13 is provided with screw holes 15 for tightly fixing the upper surface of the fixing plate 13 to the back surface of the top plate 1a of the cabinet 1 with screws 14. In addition, substantially bar-shaped stopper portions 16 for stopping and holding the latch member 4 at the lower position are protrudingly provided at opposing positions on the inner surface front sides of both guide pieces.

The latch member 4 is formed in a substantially rectangular shape.
A lower inclined sliding surface 19 is formed on the lower surface as it slides down on the inclined surface 7 of the fixing member 2. The latch portion 3 is formed so as to be vertically suspended integrally with the front end of the latch member 4, and is formed to have a size that fits just inside the stepped portion 12. The lateral width of the latch member 4 is formed to be substantially the same as the interval between the guide pieces of the fixing member 2. On both side surfaces of the latch member 4, a stopper holding portion 17 in the form of a concave groove is formed at a position higher toward the inner side where the stopper portion 16 of the fixing member 2 is fitted.
The latch member 4 is slidably provided on the fixed member 2 by sliding the inclined sliding surface 19 on the inclined surface 7 in a state where the stopper portion 16 is fitted in the stopper holding portion 17. . Further, the latch section 3 is connected to the step-down section 12.
The latch member 4 is stopped and held at the upper position so that the inclined sliding surface 19 does not slide down on the inclined surface 7 by the lower surface of the latch portion 3 being placed on the horizontal portion 9. I have. At this time, the front surfaces of the latch member 4 and the fixing member 2 are formed to be substantially flush. Also, the latch member 4
In the position below the stopper, the stopper 16 is
Abuts against the inner side surface of the lower end of the slanted surface, and stops and holds the slanted sliding surface 19 so as not to slide down on the slanted surface 7 any more. The inclined surface 7 and the inclined sliding surface 19 have an inclination angle and a surface state such that the latch member 4 easily slides down on the inclined surface 7 by gravity.

The engaging member 6 is substantially L-shaped when viewed from the side, and has a long plate-shaped mounting plate 18 which is tightly fixed at an appropriate position facing the fixing member 2 on the back surface of the door 10, and a lower end of the mounting plate 18. And a short plate-shaped engaging portion 5 that is integrally and substantially perpendicularly projected. A screw hole 15 for fixing to the back surface of the door 10 by a screw 14 is provided above the mounting plate 18. Further, an engagement concave groove 5a is formed by bending the tip of the engagement portion 5 so as to slightly project upward. The engagement groove 5a is arranged so as to be located at substantially the same height as the latch portion 3 when the latch member 4 is located at the lower position. And, this engagement groove 5
The latch portion 3 is engaged with the engagement portion 5 by fitting the latch portion 3 into the portion a from above.

A magnet 20 is fixed to the upper end of the back surface of the door 10, and a magnetic member 21 magnetically attached to the magnet 20 when the door is closed is provided at a position facing the magnet 20 in the opening of the cabinet 1. ing.

In such an earthquake-resistant lock device for a door,
In the closed state of the door 10, the magnet 20 is magnetically attached to the magnetically attached member 21 and the door 10 is maintained in the closed state. At this time, the latch portion 3 is placed on the horizontal portion 9 and the latch member 4 is stopped and held at the upper position. Also, the mounting plate 1 of the engaging member 6
The surface 8 is in contact with the front surfaces of the latch member 4 and the fixing member 2. Then, to open the door 10 from this state, the door 1
The magnet 20 is separated from the magnetized member 21 against the magnetic force by pulling the handle 0 (not shown) forward with an appropriate force. At this time, the latch member 4 is maintained at the upper position. Also, when the door 10 is in the closed state,
When the cabinet 1 vibrates in the front-back direction due to an earthquake or the like, the latch portion 3 slides down from the stepped portion 12 to the front side,
The inclined sliding surface 19 slides down on the inclined surface 7 and the latch member 4
Slides obliquely forward. Then, the latch portion 3 is internally fitted into the engagement groove 5a from above and locked with the engagement portion 5, so that the door 10 to be opened by the vibration is moved by an amount corresponding to the sliding distance of the latch member 4. Hold and lock slightly open. The lock of the door 10 prevents the stored items of the cabinet 1 from falling to the outside and being scattered. The lock is released by pushing back the door 10, the surface of the engagement member 6 pressing the front surface of the latch member 4, and the latch member 4 slides up the inclined surface 7, and the latch portion 3 is placed on the horizontal portion 9. Is placed, the latch member 4 can be easily returned to the upper position.

In such an earthquake-resistant lock device for a door, the latch member 4 has a simple structure for sliding down the fixed member 2, and the position of the latch portion 3 can be easily calculated by calculation, so that the design is easy. And can be manufactured at low cost.

FIG. 4 is a perspective view showing an anti-seismic lock device for a door different from that of the above embodiment of the present invention.

As shown in FIG. 4, the seismic lock device for the door is formed in substantially the same shape as the seismic lock device for the door. The difference is the structure of the stopper 16 in the above-mentioned door seismic lock device. In the fixing member 2,
First, the substantially bar-shaped stopper 16 is not provided on the inner surface of the guide piece. In this case, the stopper portion 16 is formed in a plate shape protruding in a facing direction over the entire length of the front end edge of each guide piece. Further, the latch member 4 is not provided with the groove-shaped stopper holding portion 17, and the prism-shaped stopper holding portions 17 are respectively provided to protrude outward in the inner part on both side surfaces of the latch member 4. The lateral width of the latch member 4 including the stopper holding portion 17 is formed to be slightly shorter than the lateral width of the space between the guide pieces of the fixed member 2.

In such a door seismic lock device, the latch member 4 slides down the inclined surface 7, and the front surface of the stopper holding portion 17 comes into contact with the rear surface of the stopper portion 16.
The latch member 4 is stopped and held at the lower position.

FIG. 5 is a perspective view showing an anti-seismic lock device for a door different from that of the above embodiment of the present invention. FIG.
[Fig. 4] Fig. 4 is a plan view of an essential part showing an operation state of the above-mentioned door anti-seismic lock device.

As shown in FIGS. 5 and 6, the seismic lock device for the door is formed in substantially the same shape as the seismic lock device for the door shown in FIG. The difference is that the gap between the two guide pieces 8 is formed to be wider than the lateral width of the latch member 4 and that the latch member 4 is dropped from the horizontal portion 9 by the lateral movement of the latch member 4. And that both guide pieces 8 are formed so as to be narrower toward the rear side so that the latch member 4 can be clamped.

In the fixing member 2, both guide pieces 8 are formed in a tapered shape narrower toward the back. The horizontal portion 9 is formed to be narrow at substantially the center of the front end of the fixing member 2.
In the latch member 4, both corners on the far side are cut and removed in the vertical direction to form a cut surface 22, and both cut surfaces 22 substantially match the taper angles of both guide pieces 8 of the fixed member 2.
In addition, the latch portion 3 is formed so as to protrude into a vertically elongated rectangular column substantially at the center of the front surface of the latch member 4. The lower end of the latch portion 3 slightly protrudes from the lower surface of the latch member 4.

In the above-described door seismic lock device, at the position above the latch member 4, the cut surface 22 is substantially sandwiched between the inner surfaces of the inner portions of the two guide pieces 8, and the latch portion 3 is placed on the horizontal portion 9. ing. When the cabinet 1 vibrates in the horizontal direction due to the earthquake, the cut surface 22 of the latch member 4 presses the guide piece 8 in the horizontal direction, and the latch member 4 slides forward along the guide piece 8. Since the latch member 4 moves to the wide portion between the two guide pieces 8 and slides in the horizontal direction, the latch portion 3 falls from the side of the horizontal portion 9 and the latch portion 3 slides down on the inclined surface 7. .

In such a door seismic lock device, even if the cabinet 1 vibrates in the lateral direction due to an earthquake, the latch member 4
Can slide down on the inclined surface 7. When the lock is released, the latch member 4 at the lower position slides up and is held between the two guide pieces 8 at the upper position, being guided between the two guide pieces 8 whose distance is narrower toward the back. The latch member 4 can always be kept in the fixed position in the upper position.

[0035]

According to the first aspect of the present invention, when an earthquake occurs, the latch member slides obliquely downward and is stopped and held at the lower position, and the latch portion of the latch member is engaged with the engaging portion of the engaging member. In addition, since the door is slightly opened and held so as not to be opened and locked, it operates reliably in the event of an earthquake, and has a simple structure, so that it is easy to design and can be manufactured at low cost.

According to the second aspect of the present invention, the latch member can slide down on the inclined surface in an obliquely forward and downward direction while being guided by the two guide pieces erected on both sides of the inclined surface.

According to the third aspect of the present invention, the latch member placed on the horizontal portion falls from the horizontal portion due to the vibration of the cabinet, so that the latch member can easily slide down on the inclined surface.

According to the fourth aspect of the present invention, since the distance between the two guide pieces is larger than the lateral width of the latch member, the lateral movement of the cabinet causes the latch member to move in the lateral direction.
When the latch member falls from the horizontal portion, the latch member can easily slide down on the inclined surface.

According to the fifth aspect of the present invention, when the lock is released, the latch member at the lower position slides up by being guided between the two guide pieces, the distance between which is narrower toward the back, and the two guides at the upper position. Since the latch member is sandwiched between the pieces, the latch member can always be accommodated in the upper fixed position, and the operation is stable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing an operation state of an earthquake-resistant lock device for a door according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an earthquake-resistant lock device for the door of the above.

FIG. 3 is a perspective view showing a cabinet having the above-mentioned door seismic lock device.

FIG. 4 is a perspective view showing an anti-seismic lock device for a door different from the above in the embodiment of the present invention.

FIG. 5 is a perspective view showing a seismic lock device for a door different from the above according to the embodiment of the present invention.

FIG. 6 is a plan view of a main part showing an operating state of the above-mentioned door anti-seismic lock device.

FIG. 7 is a longitudinal sectional view of a main part showing a conventional door seismic lock device.

[Explanation of symbols]

 Reference Signs List 1 cabinet 1a top plate 2 fixing member 3 latch portion 4 latch member 5 engaging portion 5a engaging concave groove 6 engaging member 7 inclined surface 8 guide piece 9 horizontal portion 10 door 11 slide portion 12 step drop portion 13 fixing plate 14 screw 15 Screw Hole 16 Stopper 17 Stopper Holder 18 Mounting Plate 19 Inclined Sliding Surface 20 Magnet 21 Magnetic Attachment Member 22 Cutting Surface 30 Oscillating Shaft 31 Oscillating Plate 32 Swelling Part 33 Steel Ball

Claims (5)

[Claims] 1. A fixing member is attached inside a cabinet,
The fixed member has a latch portion at the front end, and a latch member that slides obliquely downward and is stopped and held at a lower position by vibration of the cabinet, and the latch portion of the latch member located at the lower position is locked. An anti-quake locking device for a door, wherein an engaging member having an engaging portion is provided on the back surface of the door of the cabinet. 2. The fixing member according to claim 1, wherein an inclined surface on which the latch member slides is provided on the fixing member, and guide pieces for guiding the latch member are provided on both sides of the inclined surface. Seismic locking device for doors. 3. The anti-seismic lock device for a door according to claim 2, wherein a horizontal portion is provided at an upper end or a lower end of the inclined surface to hold the latch member at an upper position. 4. A space between the two guide pieces is formed to be wider than the lateral width of the latch member, and the latch member is formed so as to drop from the horizontal portion by the lateral movement of the latch member. The seismic lock device for a door according to claim 3. 5. The locking device according to claim 2, wherein the two guide pieces are formed so as to be narrower toward the back so as to hold the latch member.