JPH08275830A - Automatically lock-releasing mechanism for handle type mobile shelf - Google Patents

Abstract

PURPOSE: To secure safety by releasing lock in the case of earthquake or the like by providing a member, which is automatically swung when vibrations are received, interlocked only with the operation of a lock member on unlock side at a lock mechanism concerning a mobile shelf which can be moved by turning a handle provided on the side wall of the shelf. CONSTITUTION: When a knob 6b at an operating part 6a of a lock rod 6 is moved backward, a lock part 6R gets closer to a disk 4 for locked and is inserted to a hole 4a on the disk 4 so that the lock mechanism provided on the side wall of the shelf can be locked. When a swinging member 7 is swung in the clock-wise direction by the earthquake in such a state, a front cam 7a is separated from the right side of an interlock part 6c further to right, and the swinging member 7 is freely swung in this direction. When the vibrations are generated in the counter-clock-wise direction, since the front cam 7a energizes the interlock part 6c in the direction of unlock, the rod 6 is operated similarly to the manual push of the knob 6b to right, the lock part 6R is separated from the hole 4a and lock is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic unlocking mechanism for a lock mechanism provided on a handle type movable shelf which can be moved by rotating a handle provided on a side wall of the shelf.

[0002]

2. Description of the Related Art In a handle type movable rack, a lock mechanism is provided from a safety point of view because each rack can be freely moved by an operation such as rotation of a handle. This is because, for example, when a worker is inserted between the shelves for putting in and out of stored items, it is dangerous if the shelves or other shelves are arbitrarily moved by the operation of other workers. In addition, there is a type of handle type movable rack that converts the reciprocating swing operation of the handle into rotational motion and transmits the converted rotational force to the wheels, but the following description will be made of the handle rotatable rack.

For this reason, various lock mechanisms have been proposed and put to practical use in the past, but in principle, the wheel type handle rotates or the lever type handle swings. To the traveling wheel as a rotational force of the traveling wheel, for example, a steering shaft sprocket, an intermediate sprocket, a wheel shaft sprocket, or the like, by engaging the lock rod with each other, or In most cases, a lock rod is fitted into a lock hole or the like of a rotating member that is separately provided coaxially with a sprocket or the like.

The above-mentioned locking mechanism is useful for achieving the intended purpose in that it can prevent erroneous operation when a person is present between shelves, regardless of the locking method.
The unlocked state cannot be unlocked without manual operation, which causes the following problems.

That is, when the movable rack is in the locked state,
For example, if an earthquake occurs and the vibration acts on the movement direction of each of the shelves, it is highly likely that the shelves will fall down because they are locked immovably.

Conventionally, in view of such a point, a device has been proposed as Japanese Utility Model Publication No. 4-27395, which automatically releases the locked state when the movable rack that is locked is subjected to an earthquake. , There is a problem to be solved.

That is, in the above proposed automatic unlocking device, the locking rod is provided as a sprocket provided on the shaft of the wheel type handle or as a locked member coaxial with the sprocket. The locking / unlocking operation is performed by moving the locking hole provided in the locked disk in the same direction as the axis of the handle, that is, in the direction orthogonal to the side wall of the shelf, to perform the locking / unlocking operation. Therefore, the unlocking member that moves in response to an earthquake tremor to unlock the locked state of the locking device is a vertical plane that includes the handle shaft, that is, a vertical plane that is orthogonal to the side wall surface of the shelf. It is provided so as to swing in a plane.

However, the rocking direction of the unlocking member is the direction orthogonal to the moving direction of the movable rack (in the vertical plane parallel to the handle shaft), and there is a possibility that the movable rack may fall due to vibration. It is different from a certain direction (in the vertical plane including the moving direction of the moving rack), and the moving rack itself is stable against vibration due to its shape in the direction in which the free rocking of the unlocking member is allowed. It is not rational due to the fact that

[0009]

SUMMARY OF THE INVENTION In view of the above points, the present invention is directed in a direction in which a moving shelf is prone to fall when the movable shelf is locked by the displacement of a locking member, that is, in the moving direction of the shelf. To provide an automatic lock release mechanism capable of reliably operating and receiving a vibration caused by an earthquake or the like to displace the locked state caused by the lock member being displaced to the lock side by displacing it to the opposite side. Is an issue.

[0010]

SUMMARY OF THE INVENTION The structure of the automatic lock releasing mechanism of the present invention, which has been made for the purpose of solving the above-mentioned problems, is provided on a side surface of a movable rack having a wheel for moving at the bottom and is rotated by the wheel. A power transmission mechanism, which is interposed between a handle for giving a force and the wheel and the wheel and transmits a driving force applied to the handle as a rotational force to the wheel, and a transmission mechanism including the handle and the wheel, or the transmission. A handle provided on the side surface of the movable shelf with a lock member that is operated to lock and unlock the movement of the movable shelf with respect to a locked member provided in the mechanism so as to move together with the mechanism. In the lock mechanism of the mobile rack,
A member that can be freely swung in a plane parallel to the side surface of the shelf is pivotally suspended in the side surface of the movable shelf by a vibration such as an earthquake, and the upper end side of the swing member is the lock member. It is characterized in that it is formed as a lock release operation piece that displaces only on the lock release side and is opposed to the lock member.

[0011]

A member, which is freely swingable in a vertical plane parallel to the side wall of the movable shelf, is free to swing in response to a vibration and displaces the lock member to the lock side to maintain the locked state. Since the lock member of the lock mechanism is displaced only in the non-locking direction by free rocking caused by the vibration, it is easy to fall in the moving direction because it is locked and fixed on the rail. It is possible to automatically release the locked state of the mobile rack in the locked state at when a vibration such as an earthquake occurs.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic lock releasing device for a handle type movable rack according to the present invention will be described below with reference to the drawings. FIG.
2 is a side sectional view of a main part of a handle type movable rack to which an example of the automatic lock releasing mechanism of the present invention is applied, FIG. 2 is a front view of the main part of the present invention mechanism shown in FIG. 1, and FIG. 3 is the present invention of FIG. FIG. 4 is a perspective view from the left showing the structure of the mechanism, and FIG. 4 is a perspective view showing the same from the right.

The figure shows an example of the mechanism of the present invention. The lock mechanism is attached below the drive sprocket 3 of the handle shaft 2 provided inside the double side walls 1a and 1b of the side wall 1 in the movable shelf. DC is a drive chain that is wound around the sprocket 3, and 4 is a perforated disc that is a locked member that is provided coaxially with the sprocket 3.
Locked holes 4a into which locking portions 6R of the lock rods 6 to be described later can be fitted are circumferentially provided at a suitable pitch.

A mounting plate 5 for the lock mechanism is mounted below the sprocket 3 on the outer surface of the inner wall 1a of the movable rack. 6 is a lock rod which is a lock member supported by stepped receiving portions 5a and 5b formed in the upper and lower portions of the mounting plate 5, and the upper and lower ends of the rod 6 are horizontally about 90 degrees from the rod body. The upper piece is bent, and the upper piece is formed in the locking portion 6R to the locked hole 4a, and the lower piece is formed in the operation portion 6a. Reference numeral 6b denotes an operation knob attached to the operation portion 6a. By moving the knob 6b forward and backward in FIG. 1, the locking portion 6R is moved to the locked hole.
It is to move back and forth with respect to 4a. Incidentally, the rod 6
The operating portion 6a is supported by a resin sleeve 5c here in order to guide the forward / backward movement in the receiving portion 5b thereof, and thus the lock rod 6 moves forward and backward with respect to the side wall 1 as a locking mechanism of a type. Form an example.

In the lock mechanism, when the knob 6b of the operating portion 6a of the rod 6 is retracted with respect to the side wall 1 (to the left in FIG. 1), the locking portion 6R is displaced so as to approach the locked disk 4. Then, it is put in the hole 4a of the disk 4 to be locked. That is, since the disc 4 is coaxially integrated with the drive side sprocket 3 attached to the handle shaft 2, the disc 4 is fitted into the hole 4a of the locking portion 6R of the rod 6 to rotate the shaft 2. Is blocked.

Therefore, the above-mentioned locked state is normally released only by pushing the knob 6b of the lock rod 6 toward the side wall 1 (to the right in FIG. 1) and removing the engaging portion 6R from the hole 4a. As described above, when the moving shelf is locked, when the shaking is caused by an earthquake or the like in the moving direction of the shelf when the moving shelf is locked, the moving shelf often falls. Therefore, in the present invention, the lock mechanism in the locked state can be automatically released by utilizing a vibration such as an earthquake. This point will be described below.

A rocking member 7 is rotatably supported by a mounting shaft 8 below the lock rod 6. Here, the upper end of the rocking member 7 is an interlocking portion formed at the lower end of the rod 6. It is formed on the front cam 7a, which is an operating piece for abutting against the 6c to release the lock, and the lower end side is formed on the support portion 7b of the weight 9. 8a is the mounting shaft 8 on the wall 1a
It is a shaft bracket for attaching to.

In the swing member 7, the lock rod 6
The operating piece that unlocks when it abuts the interlocking portion 6c of the rod 6 faces the interlocking portion 6c of the rod 6 at the upper end of the attachment portion 71 to the shaft 8 that forms the upper portion of the swinging member 7. It is formed as a front cam 7a forming a slope.

On the other hand, the weight supporting portion 7b has a threaded rod 7c having a weight 9 screwed to the lower end of a portion 71a extending downward from the shaft mounting portion 71 in a substantially L-shape. It is formed by screwing at the upper end. The position of the weight 9 is adjusted so that the upper and lower positions with respect to the mounting shaft 8 can be adjusted by adjusting the screw rod 7c vertically or by adjusting the screwing position of the screw rod 7c and the nut member 7d at the lower end thereof. There is.

With the above structure, the interlocking portion of the lock rod 6
Front cam that comes into contact with 6c and acts as an unlocking part
The swing member 7 including the support portion 7b for the weight 7a and the support portion 7b for the weight 9 is swingable in either the left or right direction with respect to the interlocking portion 6c of the rod 6, but the front cam 7a of the operating portion is Here, since the inclined start end of the cam 7a is positioned on the right side of the interlocking portion 6c (see FIG. 4), the following operation characteristics are shown.

That is, when the lock rod 6 is in the locked state shown by the solid line in FIGS. 1 and 2, when the swing member 7 swings in the clockwise direction in FIG. 2, the action causes the front cam 7a of the operating portion to move. Since it separates from the right side of the interlocking part 6c to the right side,
The rocking member 7 freely rocks in this direction, but when the rocking member 7 rocks in the counterclockwise direction shown by the chain line in FIG. 2, the front cam 7a of the actuating portion moves to the interlocking portion 6c of the rod 6. Since the interlocking portion 6c is urged in the right direction in FIG. 1, that is, in the unlocking direction by abutting on the right front surface, the lock rod 6 pushes the knob 6b of the operating portion 6a in the right direction in FIG. 1 by hand. The same operation as when the lock rod 6 is inserted causes the locking portion 6R of the lock rod 6 to be released from the hole 4a of the disk 4 and unlocked.

Here, since the force for urging the lock rod 6 toward the unlocking side is formed by the rotation moment by the weight 9 suspended at the lower end of the swinging member 7, the lock rod 6 can be securely operated. It is pushed to the unlocking side.

In the mechanism of the present invention of the above-mentioned embodiment, the swinging member 7 is at least the front cam 7a of the operating portion, the weight supporting portion 7b, or each of these portions as long as they are mechanically equivalent to those shown in the drawings. 7a, 7a and the weight 9 may be integrally formed as a single member in advance. Further, even if the forward / backward direction for unlocking the lock member, here the rod 6, is the opposite direction to the illustrated example, the present invention is naturally applicable.
In this case, the inclination of the front cam 7a of the swinging member 7 is opposite to that of the illustrated example, and the rod 6 is displaced from the rear side of the rod 6 with respect to the side wall 1 to the left side of FIG. Will be installed in.

[0024]

The present invention is as described above, and in the lock mechanism of the handle type movable rack, by operating a knob or a lever, the lock member is moved forward or backward with respect to the side wall of the rack to lock or unlock the side. For the lock mechanism that was made to do so, since it was an automatic lock release mechanism by providing a member that freely swings when it receives a vibration by being linked only to the operation of the lock member on the unlock side
This is extremely useful for safety because the automatic lock release mechanism operates reliably in response to the vibration in the direction in which the shelf easily falls even if it receives vibration such as an earthquake when locked.

Further, since the rocking member is formed so that the position of the weight can be displaced up and down, the rocking sensitivity corresponding to the seismic intensity can be set, so that the sensitivity for operating the lock release mechanism can be set arbitrarily. And can be easily set and changed,
It is convenient to use.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main part of a handle type movable rack to which an example of an automatic lock release mechanism of the present invention is applied.

FIG. 2 is a front view of a main part of the mechanism of the present invention shown in FIG.

FIG. 3 is a left perspective view showing the configuration of the mechanism of the present invention in FIG.

4 is a right perspective view of the mechanism of FIG.

[Explanation of symbols]

 1 Side wall of shelf 2 Handle shaft 3 Drive sprocket 4 Locked disc 4a Locked hole 5 Lock mechanism mounting plates 5a, 5b Lock rod 6 receiving part 6 Lock rod 6R Locking part 6a Operating part 6b Knob 7 Swing member 7a Front cam of working part 7b Weight support 7d Nut member 7c Screw rod 8 Mounting shaft 9 Weight DC sprocket

Claims (2)

[Claims] 1. A handle provided on a side surface of a movable rack having wheels for movement at the bottom to give a rotational force to the wheel, and a driving force applied to the handle interposed between the handle and the wheel. The wheel is provided with a transmission mechanism that transmits as a rotational force, and the movement of the movable rack is performed with respect to a transmission mechanism including the handle and the wheel or a locked member provided in the mechanism so as to be in synchronization with the transmission mechanism. In a lock mechanism for a handle type movable rack, in which a lock member operated for locking and unlocking is provided on a side surface of the movable rack so as to move back and forth, a side surface of the movable rack due to a vibration such as an earthquake in a side surface of the movable rack. A member that can be freely swung in a plane parallel to is suspended and pivotally supported, and the upper end side of the swing member is formed as a lock release actuating piece that displaces the lock member only to the lock release side. Lock An automatic lock release mechanism for handle-type movable shelves, which is opposed to the lock member. 2. The automatic lock release mechanism for a handle type movable rack according to claim 1, wherein the lock member is provided such that its forward and backward displacement direction is orthogonal to the side surface of the movable rack.