JPH08275829A - Automatically lock-releasing mechanism for handle type mobile shelf - Google Patents

Abstract

PURPOSE: To provide the automatically lock-releasing mechanism with which the lock of a mobile shelf can be released by oppositely displacing a lock member when the mobile shelf is locked by the displacement of the lock member. CONSTITUTION: In the lock mechanism of a handle type mobile shelf for which an operating member depending on a knob or a lever for rod operation is provided on the rear end side of a lock rod 3 and a converting mechanism for converting the momentum of the rotary action of the operating member into the linear action of the lock rod 3 while storing it in both springs 11 and 12 is provided by being connected between the operating member and the rear end side of the rod, a member 13 to be freely swung with vibrations within a plane orthogonal with a rotary shaft 9 is pivotally supported and hung down on the shaft 9 of the operating member. Further, the upper end side of the swinging member 13 is provided while facing to one of components of the converting mechanism by forming the converting mechanism at a manipulator 14b to be manipulated only to the side of lock releasing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lock releasing 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, since each rack can be freely moved by rotating a handle, a lock mechanism is provided from the viewpoint of safety. For example,
This is because, if an operator is inserted between the shelves for putting in and out the stored items, it is dangerous if the shelves or other shelves are arbitrarily moved by the operation of other workers. In addition, there is also a type of handle type moving rack that converts the swinging operation of the handle back and forth into rotational motion and transmits the converted rotational force to the wheels, but the following description refers to the handle rotating type moving rack. .

For this reason, various lock mechanisms have been proposed and put to practical use in the past, but in principle, a rotation mechanism forming a transmission mechanism for transmitting the rotation of the steering wheel to the running wheels. A member, for example, a handle shaft sprocket, an intermediate sprocket, a wheel shaft sprocket, or the like is engaged with the lock rod, or a lock rod is fitted into a lock hole or the like of a rotary member separately provided coaxially with the above-mentioned respective sprockets. Most methods are used.

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, an apparatus has been proposed as Japanese Utility Model Publication No. 4-27395, in which the locked state is automatically released when the movable rack is locked by 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, has a structure of a handle shaft sprocket provided on a side surface of a movable rack and around which a chain is hung. A lock rod is installed in a posture in which the tip side can advance and retreat with respect to the tooth that cannot be chained or the tooth of the locking gear that is coaxial with the sprocket, and is attached to the axis of the rod in the locking direction when the rod is locked. A spring that urges the lock rod in the unlocking direction when unlocked and a spring that is positioned below the spring and that biases the lock rod only in the unlocking direction are arranged, and the rear end side of the rod is An operating member such as a rod operating knob or lever is provided, and the momentum of the rotational motion of the operating member is converted into the linear motion of the lock rod while being stored in the springs. In a lock mechanism for a handle type movable shelf, which is provided by connecting a conversion mechanism between the operation member and the rear end side of the rod, the rotation shaft of the operation member is freely shaken by vibration in a plane orthogonal to the rotation shaft. A movable member is pivotally supported and suspended, and the upper end side of the swinging member is formed as an actuating piece that operates only the unlocking side of the conversion mechanism to form one of the constituent members of the conversion mechanism. It is characterized by having been placed opposite.

[0011]

[Function] A member that freely swings in response to a vibration provided in a plane parallel to the side surface of the movable shelf moves the lock rod to the lock side, and vibrates the transmission mechanism. Since it is operated only in the non-locking direction by the free swinging caused by the impact, it is locked and fixed on the rail so that the movable shelf in the locked state in which it is easy to fall down in the moving direction is concerned. The lock can be automatically released when a vibration such as an earthquake occurs.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the automatic unlocking device of the present invention will be described with reference to the drawings. 1 is a perspective view of a main part of a handle type movable shelf to which an example of the present invention mechanism is applied, FIG. 2 is a front view of the main part of the present invention mechanism shown in FIG. 1, and FIG. It is a perspective view which shows a structure.

FIG. 1 shows an example of the device of the present invention.
The lock mechanism R is a handle shaft sprocket driven by a handle shaft HS provided on the side wall SW of the movable rack ML.
Mounted below the DS. DC is a drive chain hung on the sprocket DS, CT is a chain tensioner, P is a support of a side wall SW, CF is a carriage of a moving shelf ML, and FS is a driven sprocket. Then, 1 is a mounting plate of the lock mechanism, which is mounted below the sprocket DS inside the side wall SW of the movable rack ML. Reference numeral 2 designates a lock rod receiving plate which is substantially U-shaped when viewed from the side surface attached to the upper part of the above-mentioned mounting plate 1, and has sleeves 2a in the holes provided in the upper and lower projecting pieces 2b and 2c. The lock rod 3 is attached, and the lock rod 3 is loosely inserted in the sleeve 2a in a vertically movable state.

The lock rod 3 has an upper end portion 3a which is fitted between the teeth of the sprocket DS so as to be easily fitted therein. A spring receiving pin 4 is provided in the middle of the lower half of the rod 3, while a longitudinal groove 5 is formed at the lower end,
A retaining washer 6 is fixed to the lower end of the groove 5 with a pin 6a, and a spring seat 11a is provided above the washer 6.
Is slidably inserted along the rod 3.

Reference numeral 7 denotes the rod 3 below the mounting plate 1.
Is a mounting plate of the cam shaft 9 which is mounted below the lower end of the shaft and has a substantially rectangular shape on a plane. The cam plate 8 is mounted on the front end side of the shaft 9 and directly below the rod 3, and at the rear end thereof. A cam shaft 9 to which an operating knob of a lock mechanism or a handle (not shown) is attached is rotatably attached in a horizontal posture. The tip of the cam plate 8 is connected to the groove 5 at the lower end of the rod 3 by a connecting pin 10, so that the cam plate 8 takes a horizontal posture (chain line in FIG. 2) when not locked. ing.

On the lower half side of the rod 3, between the lower surface of the lower projecting piece 2c of the rod receiving plate 2 and the upper surface of the spring receiving pin 4, there is provided a spring 12 acting on the retracting (lowering) side of the rod 3. , The lower surface of the pin 4 and the seat 11
A buffer spring 11 is inserted between the upper surfaces of a.

In FIG. 2, the position of the lock rod 3 shown by the broken line shows an unlocked state in which the tip portion 3a thereof is not fitted between the teeth of the sprocket DS. Therefore, when the cam shaft 9 is rotated clockwise by 90 degrees by the operation knob (not shown) in FIG. 2, the cam plate 8 stands up from the position indicated by the chain line in FIG. 2 to the position indicated by the solid line in FIG. 2 by 90 degrees. When the cam plate 8 stands up 90 degrees, the tip end side of the connecting pin 10 slides in the groove 5 provided at the lower end side of the rod 3 to move upward, and acts to compress the spring 11 via the receiving seat 11a.

The spring 11, which receives a compressive force from below,
Since it works to push up the spring receiving pin 4 at the upper end side, the lock rod 3 to which this pin 4 is stopped overcomes the repulsive force of the spring 12 and rises, and the tip portion of this rod 3 3a fits between the teeth of the sprocket DS,
It will be locked.

In the ascending (locking) operation of the lock rod 3, it is assumed that the tip 3a of the lock rod 3 does not enter between the teeth of the sprocket DS and hits the tooth surface to prevent the ascent of the rod 3. However, the cam shaft 9 to which the operation knob is attached can always rotate 90 degrees, that is, it means that the lock operation is performed. This is because the tip side of the connecting pin 10 that converts this rotational movement into a linear movement when the cam plate 8 rotates 90 degrees and stands up is the rod 3.
The reason for this is that the spring 11 slides in the long groove 5 formed while compressing the spring 11. In this case, since the repulsive force of the spring 11 that is compressed and stored becomes a force for moving the rod 3 upward, the sprocket DS slightly moves or the tip side of the rod 3 slightly rattles to cause the rod 3 to move. Can enter between the teeth of the sprocket DS.

The above-mentioned locked state is normally released only by rotating the cam shaft 9, which is a rotary shaft, 90 degrees counterclockwise. However, when the movable rack is locked, vibration due to an earthquake or the like is generated in the moving direction of the rack when the movable rack is locked. As described above, when the mobile rack is received, the mobile rack is likely to fall. 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.

Reference numeral 13 denotes a swinging member which is freely rotatably inserted in the cam shaft 9, and the upper end side of the swinging member 13 is formed in the associated contact portion 14 with the cam plate 8 and the lower end side of the weight 16 is provided. It is formed on the support portion 15.

The abutting portion 14 of the rocking member 13 on the cam plate 8 is located slightly above the shaft loosely inserted portion 14a with the shaft 9 formed in the middle of the rocking member 13 here. The loose insertion part 14a is provided with a tongue-shaped actuating piece 14b formed by advancing to the right side.
It is formed integrally with.

On the other hand, the weight supporting portion 15 includes the shaft loose insertion portion 14a.
Is formed integrally with the loose insertion portion 14a extending downward from the above, and is formed by a member 15a which is symmetrical with respect to the operating piece 14b and the cam shaft 9 and has an inverted L shape. A nut member 15b is attached to a lower horizontal piece of the inverted L-shaped member 15a, and a screw rod 15c having a weight 16 screwed on the lower end side is screwed into the nut member 15b at its upper portion. Position of weight 16 is screw rod 15c
The upper and lower positions with respect to the cam shaft 9 can be adjusted by adjusting the upper and lower positions or adjusting the screwing position of the screw rod 15c and the nut member 15b.

With the above structure, the associated contact portion with the cam plate 8
The swing member 13 including the support portion 15 for the weight 14 and the weight 16 is swingable in either the left or right direction with respect to the cam shaft 9,
Since the actuating piece 14b of the contact portion 14 is located on the right side of the cam plate 8 here, the following operating characteristics are shown.

That is, when the cam plate 8 is in the locked state shown by the solid line in FIG. 2, the rocking of the rocking member 13 in the clockwise direction causes the operating piece 14b of the abutting portion to separate from the right side of the cam plate 8. Therefore, although it is free swinging, in swinging in the counterclockwise direction, the operating piece 14b of the abutting portion abuts the right side surface of the cam plate 8 to move the cam plate 8 in the counterclockwise direction, that is, the unlocking direction. The cam plate 8 is rotated in the counterclockwise direction in the same manner as the knob of the shaft 9 is rotated in the counterclockwise direction by hand, and the cam plate 8 is unlocked.

Here, the force for urging the cam plate 8 in the counterclockwise direction is a point where the rotation moment by the weight 16 suspended at the lower end of the swinging member 13 and the connecting pin 10 exceed a speculation point. Because of the repulsive force of the spring 11 that is received from above, the cam plate 8 surely rotates 90 degrees toward the unlocking side when the connecting pin 10 exceeds the point of consideration.

In the device of the present invention of the above-mentioned embodiment, the rocking member 13 has at least the contact portion 14, the weight supporting portion 15, or each of these portions 14, as long as they are mechanically equivalent to those shown in the drawings.
The components up to 15 and the weight 16 may be integrally formed as a single member in advance. In addition, a lock member, here, the cam plate 8
The present invention is of course applicable even if the rotation direction for unlocking is the opposite direction to the illustrated example. in this case,
The operating piece 14b of the swinging member portion 13 is positioned on the left side of the cam plate 8.

[0028]

As described above, according to the present invention, in the locking mechanism of the handle type movable rack, the lock member is locked or locked by rotating the knob or the lever on the side surface of the rack in the clockwise or counterclockwise direction. In contrast to the lock mechanism that is displaced to the unlock side, the automatic unlock mechanism is provided by providing a member that automatically swings in response to a vibration so that it is linked only to the operation of the operating member on the unlock side. , Even if it receives a vibration such as an earthquake while it is locked, the automatic unlocking mechanism operates reliably in response to the vibration in the direction in which the shelf easily falls, which is extremely useful for safety.

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 perspective view of a main part of a handle type movable shelf to which an example of the 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 perspective view showing the configuration of the mechanism of the present invention in FIG.

[Explanation of symbols]

 1 Lock mechanism mounting plate 2 Lock rod receiving plate 3 Lock rod 4 Spring receiving pin 5 Longitudinal groove 6 Washer 7 Cam shaft mounting plate 8 Cam plate 9 Cam shaft 10 Connecting rod 11 Buffer spring 11a Spring seat 12 Spring 13 Swing member 14 Related contact part 14a Free insertion part 14b Operating piece 15 Weight support 15a Inverted L-shaped member 15b Nut member 15c Screw rod 16 Weight DS Handle shaft sprocket

Claims (2)

[Claims] 1. A tooth side of a handle shaft sprocket, which is provided on a side surface of a movable rack and around which a chain is hung, or a tooth of a locking gear that is coaxial with the sprocket, has a tip end side. A lock rod is provided in a posture capable of advancing and retracting, and a spring for biasing the rod in the locking direction when locking and biasing in the unlocking direction when unlocking is provided on the axis of the rod and the lock rod positioned below the spring. A spring for urging only in the non-locking direction is arranged, and an operating member by a knob or lever for operating the rod is provided on the rear end side of the rod, and the momentum of the rotational motion of the operating member is set to the above-mentioned two. A conversion mechanism for converting the lock rod into linear motion while being stored in a spring is connected to the lock mechanism of the handle type movable rack provided between the operation member and the rear end side of the rod. The rotary shaft of the operating member,
A member that can be freely swung by vibration in a plane orthogonal to the axis is supported and suspended, and the upper end side of the swing member serves as an operating piece that operates the conversion mechanism only on the unlock side. An automatic lock release mechanism for a handle type movable rack, characterized in that it is formed and is placed opposite one of the constituent members of the conversion mechanism. 2. The automatic unlocking mechanism for a handle type movable rack according to claim 1, wherein a weight is provided on the lower end side of the swing member, and the weight can be displaced up and down on the swing member.