JP3548624B2 - Automatic unlocking mechanism for handle-type moving shelf - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an automatic unlocking mechanism of a lock mechanism provided on a handle-type movable shelf that can be moved by rotating a handle provided on a side wall of the shelf.
[0002]
[Prior art]
In the handle type movable shelf, since each shelf can be freely moved by rotating the handle, a lock mechanism is provided from the viewpoint of safety. This is because, for example, when a worker enters between shelves for putting in and taking out stored articles, it is dangerous to move the shelf or another shelf by an operation of another worker. In addition, there is also a handle-type movable shelf that converts the swinging operation of the handle after turning to a rotational motion and transmits the converted rotational force to the wheels, but the following description describes a handle-rotary movable shelf. .
[0003]
For this reason, various types of lock mechanisms have been conventionally proposed and used in practice, but in principle, a rotation member forming a transmission mechanism for transmitting the rotation of the steering wheel to the traveling wheels, for example, In most cases, a lock rod is bitten by a handle shaft sprocket, an intermediate sprocket, a wheel shaft sprocket, or the like, or a lock rod is fitted into a lock hole or the like of a rotary member provided coaxially with each of the above sprockets. It is.
[0004]
The lock mechanism is useful in achieving the intended purpose in that any lock method can prevent an erroneous operation when a person is present between the shelves. Since the lock cannot be released without manual operation, there are the following problems.
[0005]
That is, when the movable shelf is in a locked state, for example, when an earthquake occurs and the vibration acts in the moving direction of the respective shelf, there is a high possibility that the shelf is locked immovably and falls. It is.
[0006]
In view of the above, a device that automatically releases a locked state when a locked moving shelf is subjected to an earthquake vibration has been proposed as Japanese Utility Model Publication No. 4-27395. There's a problem.
[0007]
That is, in the above proposed automatic unlocking device, the locking rod is a sprocket provided on the shaft of the wheel-type handle, or a locked member provided as a locked member coaxially with the sprocket. The locking and unlocking operation is carried out by being advanced and retracted in the same direction as the axis of the handle, that is, in the direction perpendicular to the side wall of the shelf, with respect to the hole for locking provided in the disc for locking. Therefore, the unlocking member that moves in response to the vibration of the earthquake to unlock the locked state of the lock device is in a vertical plane including the handle shaft, that is, in a vertical plane orthogonal to the side wall surface of the shelf. It is provided so as to swing.
[0008]
However, the rocking direction of the unlocking member is a direction orthogonal to the moving direction of the movable shelf (in a vertical plane parallel to the handle axis), and a direction in which the movable shelf may fall due to vibration ( (In the vertical plane including the moving direction of the moving shelf), and the direction in which the free rocking of the unlocking member is allowed is that the moving shelf itself is structurally stable against vibration. This is because it cannot be said that it is reasonable.
[0009]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, when the movable shelf is locked by the displacement of the lock member, in a direction in which the shelf easily falls, that is, when the shelf is subjected to a vibration such as an earthquake in the moving direction of the shelf. An object of the present invention is to provide an automatic lock release mechanism that can be reliably operated to displace a lock state due to the displacement of the lock member to the lock side and be released by displacing the lock member to the opposite side.
[0010]
[Means for Solving the Problems]
The structure of the automatic unlocking mechanism of the present invention, which has been made to solve the above-mentioned problems, is provided with a handle shaft sprocket provided on a side surface of a movable shelf and having a chain mounted thereon. A lock rod is provided in such a position that the tip side can advance and retreat with respect to the teeth of the lock gear coaxial with the sprocket, and the rod is urged in the lock direction on the axis of the rod when locked and unlocked when unlocked. A spring for biasing and a spring located below the spring and for biasing the lock rod only in the unlocking direction are disposed, and a knob or lever for operating the rod is provided at the rear end of the rod. A conversion mechanism for providing an operation member and converting the momentum of the rotational movement of the operation member into linear movement of the lock rod while storing the momentum in the two springs; In a locking mechanism for a handle-type movable shelf connected between the rear ends of a pad, a member that can freely swing by vibration in a plane orthogonal to the axis is provided on a rotation axis of the operating member. And the upper end side of the swinging member is formed as an operation piece that operates the conversion mechanism only on the unlocking side, and is opposed to one of the constituent members of the conversion mechanism. Is what you do.
[0011]
[Action]
A member that swings freely in response to vibration provided in a plane that is freely swingable in a plane parallel to the side surface of the moving shelf moves the transmission mechanism that moves the lock rod to the lock side and holds it, receiving the vibration. Since the free swing is caused to operate only in the non-locking direction, the lock of the moving shelf in the locked state, which is locked and fixed on the rail and easily falls down in the moving direction, is subjected to the earthquake. It can be automatically released when a vibration occurs due to the above.
[0012]
【Example】
Next, an embodiment of the automatic lock release device of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a main part of a handle-type moving 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. 1, and FIG. FIG. 3 is a perspective view showing a configuration.
[0013]
The figure shows an example of the device of the present invention. In FIG. 1, the lock mechanism R is attached below a handle shaft sprocket DS driven by a handle shaft HS provided on a side wall SW of the movable shelf ML. DC is a drive chain wound around the sprocket DS, CT is a chain tensioner, P is a support of the side wall SW, CF is a carriage of the movable shelf ML, and FS is a driven sprocket. Reference numeral 1 denotes a mounting plate of a lock mechanism, which is mounted below the sprocket DS inside the side wall SW of the movable shelf ML. Reference numeral 2 denotes a lock plate receiving plate having a substantially U-shape as viewed from the side attached to the upper portion of the mounting plate 1, and a sleeve 2a provided in a hole provided in the upper and lower projecting pieces 2b and 2c. The lock rod 3 is loosely inserted into the sleeve 2a in a vertically movable state.
[0014]
The upper end 3a of the lock rod 3 is adjusted to a shape that fits easily between the teeth of the sprocket DS and is easily fitted. A spring receiving pin 4 is provided in the middle of the lower half of the rod 3, while a vertically elongated groove 5 is formed at the lower end, and a retaining washer 6 is fixed to the lower end of the groove 5 by a pin 6a. A spring seat 11a is slidably inserted along the rod 3 above the washer 6.
[0015]
Reference numeral 7 denotes a mounting plate for a camshaft 9 which is mounted below the lower end of the rod 3 below the mounting plate 1 and has a substantially substantially flat shape in a plan view. At the rear end, a camshaft 9 to which an operation knob or a handle (not shown) of the lock mechanism is attached is rotatably mounted in a horizontal posture. The distal end 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 when not locked, the cam plate 8 takes a horizontal posture (chain line in FIG. 2). ing.
[0016]
In the lower half of the rod 3, a spring 12 acting on the retreating (downward) side of the rod 3 is provided between the lower surface of the lower projecting piece 2 c of the rod receiving plate 2 and the upper surface of the spring receiving pin 4. A buffer spring 11 is inserted between the lower surface of the pin 4 and the upper surface of the seat 11a.
[0017]
In FIG. 2, the position of the lock rod 3 indicated by a broken line indicates an unlocked state in which the tip 3a does not fit between the teeth of the sprocket DS. Accordingly, when the camshaft 9 is rotated clockwise by 90 degrees by the operation knob (not shown) in FIG. 2, the cam plate 8 rises 90 degrees from the position of the chain line in FIG. 2 to the position of the solid line in FIG. When the cam plate 8 rises by 90 degrees, the tip end side of the connecting pin 10 slides in the groove 5 provided on the lower end side of the rod 3 to move upward, and acts to compress the spring 11 via the receiving seat 11a.
[0018]
The spring 11 which receives a compressive force from below acts to push up the spring receiving pin 4 at the upper end thereof, so that the lock rod 3 on which the pin 4 is stopped overcomes the repulsive force of the spring 12. As a result, the tip 3a of the rod 3 is fitted between the teeth of the sprocket DS, and the rod 3 is locked.
[0019]
In the above-described raising (locking) operation of the lock rod 3, even if the tip portion 3a does not enter between the teeth of the sprocket DS and hits against the tooth surface or the like to prevent the raising of the rod 3, the operation is performed. The camshaft 9 to which the knob is attached can always be rotated by 90 degrees, that is, a lock operation has been performed. This is because the tip of the connecting pin 10 that converts this rotational motion into linear motion when the cam plate 8 is turned upright by 90 degrees slides in the long groove 5 formed in the rod 3 while compressing the spring 11. is there. In this case, since the repelling force of the spring 11 stored by compression is a force for moving the rod 3 upward, the sprocket DS slightly moves or the tip end side of the rod 3 rattles a little, so that the rod 3 Can enter between the teeth of the sprocket DS.
[0020]
The above-mentioned locked state is normally not released unless the cam shaft 9 serving as the rotating shaft is rotated counterclockwise by 90 degrees. However, when the movable shelf is locked, it is subjected to a vibration due to an earthquake or the like in the moving direction of the shelf. As described above, the movable shelf is likely to fall over. Therefore, in the present invention, the lock mechanism in the above-mentioned locked state can be automatically released by using a vibration such as an earthquake. Hereinafter, this point will be described.
[0021]
Reference numeral 13 denotes a swinging member freely rotatably inserted into the camshaft 9. The upper end of the swinging member 13 is formed as an abutting portion 14 to the cam plate 8, and the lower end is a supporting portion 15 of the weight 16. Is formed.
[0022]
The abutting portion 14 of the swinging member 13 that contacts the cam plate 8 advances rightward of the cam plate 8 slightly above a shaft play insertion portion 14a with the shaft 9 formed in the middle of the swinging member 13. It has a tongue-shaped operating piece 14b formed as described above and is formed integrally with the play insertion portion 14a.
[0023]
On the other hand, the weight supporting portion 15 is a member that is integrally formed with the free insertion portion 14a extending downward from the free shaft insertion portion 14a, and has an inverted L-shape symmetric with respect to the operation piece 14b and the cam shaft 9. 15a. 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 a lower end side thereof is screwed into the nut member 15b at an upper portion thereof. The position of the weight 16 can be adjusted up and down with respect to the camshaft 9 by adjusting the position of the screw rod 15c up and down, or adjusting the screwing position of the screw rod 15c and the nut member 15b.
[0024]
With the above configuration, the swinging member 13 including the related abutting portion 14 to the cam plate 8 and the supporting portion 15 of the weight 16 can swing in the left and right directions with respect to the camshaft 9. Since the operating piece 14b of the contact portion 14 is located on the right side of the cam plate 8 here, the following operating characteristics are exhibited.
[0025]
That is, when the cam plate 8 is in the locked state shown by the solid line in FIG. 2, the swinging movement of the swinging member 13 in the clockwise direction is free since the operating piece 14b of the contact portion is separated from the right side of the cam plate 8. In the swinging operation in the counterclockwise direction, the operating piece 14b of the contact portion contacts the right side surface of the cam plate 8 to urge the cam plate 8 in the counterclockwise direction, that is, the unlocking direction. Therefore, the cam plate 8 is rotated counterclockwise in the same manner as when the knob of the shaft 9 is rotated counterclockwise by hand, and the lock is released.
[0026]
Here, the force for urging the cam plate 8 in the counterclockwise direction is increased by the rotation moment by the weight 16 suspended at the lower end of the swinging member 13 and by the connecting pin 10 after it exceeds the expected point. The cam plate 8 surely rotates 90 degrees to the unlocking side when the connecting pin 10 exceeds the expected point because of the repulsive force of the spring 11 received from the spring 11.
[0027]
In the device of the present invention of the above embodiment, the swinging member 13 has at least the contact portion 14, the weight supporting portion 15, or the weight of each of these portions 14, 15 as long as it is mechanically equivalent to the illustrated one. The components up to the weight 16 may be integrally formed in advance by a single member. Further, the present invention is of course applicable even if the rotation direction for unlocking the lock member, here the cam plate 8, is opposite to that in the illustrated example. In this case, the operation piece 14b of the swinging member 13 is positioned on the left side of the cam plate 8.
[0028]
【The invention's effect】
The present invention is as described above. In a lock mechanism of a handle-type movable shelf, a knob or a lever is rotated clockwise or counterclockwise on a side surface of the shelf to displace a lock member to a lock or unlock side. An automatic unlocking mechanism is provided by providing a member that automatically swings in response to a vibration so as to be linked only to the operation on the unlocking side of the operating member, so that the locking mechanism is locked. This is extremely useful in terms of safety because the automatic lock release mechanism operates reliably in response to the vibration in the direction in which the shelf is likely to fall even if it is subjected to vibration such as an earthquake.
[0029]
In addition, since the swinging member can be configured so that the position of the weight can be displaced up and down, the swinging sensitivity corresponding to the seismic intensity can be set. It can be set and changed, which is convenient for use.
[Brief description of the 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 shown in FIG. 2;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 lock mechanism mounting plate 2 lock rod receiving plate 3 lock rod 4 spring receiving pin 5 vertical groove 6 washer 7 cam shaft mounting plate 8 cam plate 9 cam shaft 10 connecting rod 11 buffer spring 11a spring receiving seat 12 spring 13 swing member 14 Related contact portion 14a Free insertion portion 14b Working piece 15 Weight support portion 15a Reverse L-shaped member 15b Nut member 15c Screw rod 16 Weight DS Handle shaft sprocket

Claims (2)

The handle shaft sprocket provided on the side surface of the movable shelf and chained is locked in such a position that the distal end side can move forward and backward with respect to the teeth of the chain that cannot be chained or the teeth of the locking gear coaxial with the sprocket. A spring that urges the rod in a locking direction when locked and urges in a non-locking direction when releasing the lock on the axis of the rod, and the lock rod that is located below the spring only in the unlocking direction. A biasing spring is provided, and an operating member is provided at the rear end side of the rod by a knob or lever for operating the rod, and the momentum of the rotational movement of the operating member is stored in the two springs. A conversion mechanism for converting the linear motion of the lock rod into a linear motion is provided in the lock mechanism of the handle-type movable shelf provided between the operating member and the rear end of the rod. A member that can freely swing by vibration in a plane orthogonal to the axis is suspended on the rotation axis of the member, and the upper end side of the swinging member is moved to the unlocking side of the conversion mechanism. An automatic unlocking mechanism for a handle-type movable shelf, wherein the automatic unlocking mechanism is formed on an operation piece that operates only one of the members and is provided opposite to one of the components of the conversion mechanism. 2. The automatic unlocking mechanism for a handle-type movable shelf according to claim 1, wherein a weight is provided at a lower end side of the swing member, and the weight can be displaced up and down on the swing member.

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