JPH0466761B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a handle device that can be suitably used in mobile racks and the like used in offices and libraries as substitutes for storage cabinets, bookshelves, and the like.

[Prior Art] As a moving rack of this type, a plurality of rack bodies each having a handle for manual operation are mounted on rails laid on the floor via running wheels so that they can be moved in the thickness direction. Are known. In this case, the thickness and number of rack bodies relative to the rail length are set so that the required moving distance remains when the rack bodies are brought into close contact with each other, and the desired rack body and By selectively forming a passageway between adjacent rack bodies through which people can enter and exit, the rack body can be used as a storage or the like as appropriate.

The handle of each rack body is generally provided with a grip at the rotating end of the hand arm, and the drive shaft of the handle is connected to the movement of the rack body through a transmission element such as a chain or gear. connected to the wheels. Therefore, by grasping the grip of the handle and manually rotating the handle arm, the rack body can be moved on the rail.

[Problems to be Solved by the Invention] By the way, in such a moving rack or a similar device, when the handle of a specific rack body is rotated to move the rack body,
It is not uncommon for other rack bodies that are in close contact with the rack body to be forced to follow the rack body. In such a case, if the handle and the running wheels are connected only through a transmission element such as a chain, the handle of the driven rack body will rotate as the rack moves. Therefore, it is easy to cause unexpected injuries to people standing in the vicinity, or accidents such as getting clothes caught in them.

Therefore, in such a device, the rotational force from the handle side is reliably transmitted to the running wheels in either direction, but the function is such that the reverse driving force from the running wheels side to the handle side is not transmitted. It is desirable that this be granted.

Furthermore, with such devices, if the handle is stopped at various positions when not being operated, it is unsightly and has a negative effect on operation, so when the handle is released from the grip, the handle returns to its home position. The ideal would be to return.

Recently, various devices with such functions have been developed, but all of the conventional devices have complicated structures, are difficult to operate reliably, and lack reliability. In particular, it is difficult to smoothly and reliably return the handle to the home position even if the handle is released from any operating position, and no practical product has been developed.

The present invention aims to solve these problems.

[Means for solving the problems] In order to achieve such objects, the present invention has the following features:
The following configuration is adopted.

That is, the handle device for a moving rack or the like according to the present invention has a drive shaft 6 connected to a running wheel 5 via transmission elements 51 and 52, as shown in FIG.
A handle arm 7 is mounted on the drive shaft 6 so that it can freely rotate when not restrained by gravity, and a grip 8 is attached to the rotating end of the handle arm 7 so that it can freely rotate. The grip 8 is provided with a differential transmission mechanism 9 provided between the handle arm 7 and the drive shaft 6, and the rotation of the grip 8 when the handle arm 7 is stopped is controlled by the drive shaft. 6 to n:1 (however, n
is a positive value other than 1), and the transmission ratio and transmission direction of the differential transmission mechanism 9 are set so that the transmission can be carried out in the same direction at a ratio of (a positive value other than 1).

[Function] With this configuration, the grip 8 can freely rotate with respect to the handle arm 7 when the handle is not operated. Therefore, even if a pressing force acts on the rack main body 3 or the like and a reverse driving force acts on the drive shaft 6 from the traveling wheel 5 side, the entire handle does not rotate. That is, the rotation of the drive shaft 6 is differentially distributed between the handle arm 7 and the grip 8 via the differential transmission mechanism 9, but the handle arm 7 is maintained in a hanging state due to gravity. The grip 8 is in an unloaded state. Therefore, when the drive shaft 6 rotates, the grip 8 rotates idly, and the handle arm 7
Gravity will hold it in its hanging position.

On the other hand, hold the grip 8 and
When the rotation operation is performed, the drive shaft 6 starts rotating accordingly. That is, considering the case where the grip 8 is grasped and the handle arm 7 is rotated once in the clockwise direction, the situation is as follows. First, the ratio of the rotation speed of the grip 8 and the rotation speed of the drive shaft 6 when the handle arm 7 is stopped is set to n:1.
(However, n is a positive value other than 1) and when the movement is observed based on the coordinates set on the handle arm 7, the grip 8 rotates once in the counterclockwise direction, and the The shaft 6 will also rotate 1/n in the counterclockwise direction. Converting this to a coordinate set in space as a reference, the grip 8 does not rotate, the handle arm 7 rotates once clockwise, and the drive shaft 6
will rotate 1-1/n clockwise. A similar effect can be obtained even when the handle arm is operated in the opposite direction. Therefore, unless n is 1, if the grip 8 is gripped and the handle arm 7 is rotated, the drive shaft 6 will correspondingly rotate and the traveling wheels 5 will be driven.

When n is 1, the aforementioned 1-1/n becomes zero, and no matter how much the grip 8 is gripped and the handle arm 7 is rotated, the drive shaft 6 will not rotate. It is for this reason that the case where n is 1 is excluded in the present invention.

In this state, when the operation is stopped and the hand is released from the grip 8, the load restraining the rotation of the grip 8 disappears. Therefore, no matter what rotational state the drive shaft 6 is in, no restraining force can be transmitted to the handle arm 7. As a result, the handle arm 7 self-returns to the hanging position due to gravity. At that time, the grip 8 rotates idly to absorb the difference in rotation between the drive shaft 6 and the handle arm 7.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 2 to 4.

In this mobile rack, a plurality of rack bodies 3 each having a handle device 4 are mounted on parallel rails 2 laid on a floor 1 via running wheels 5.

As shown in FIG. 2, the rack main body 3 is in the form of a bookshelf with openings on both sides 3a in the direction of movement, and has an operation panel 3b on its front surface. A handle device 4 is provided in this operation panel 3b portion.

As shown in FIGS. 3 and 4, the handle device 4 includes a drive shaft 6 connected to the running wheels 5 via a sprocket 51 and a chain 52, which are transmission elements, and a shaft attached to the drive shaft 6 so as to freely rotate. A grip 8 is attached to the rotating end 72a of the handle arm 7 so as to be freely rotatable.
and a differential transmission mechanism 9 provided between the grip 8, the handle arm 7, and the drive shaft 6.

The drive shaft 6 is supported horizontally within the rack body 3 via a bearing 61, and one end 6 of the drive shaft 6 is supported horizontally within the rack body 3 via a bearing 61.
a is made to penetrate the operation surface panel 3b and protrude to the outside. The handle arm 7 is attached to the protruding end 6a of the drive shaft 6 so as to be freely rotatable.

The handle arm 7 includes a hollow box-shaped base end 71 in which a boss 71a is mounted on the outer periphery of the drive shaft 6 so as to be freely rotatable, and a hollow extending part 72 extending radially from the base end 71. Due to the gravity acting on its own center of gravity which is eccentric to the extending portion 72 side, the gravity acting on the grip 8 attached to the rotating end 72a of the extending portion 72, etc., when it is not restrained, it may not be as shown in the drawing. It is designed to be stably held in the hanging position as shown. The opening 71b formed in the base end 71 of the handle arm 7 is covered with a cover (not shown).

The grip 8 has a cylindrical shape, and its shaft portion 81
is supported on the front wall portion of the rotating end 72a of the handle arm 7 so as to be freely rotatable.

The differential transmission mechanism 9 includes a protruding end 6a of the drive shaft 6.
a large-diameter timing pulley 91 fixed to the handle arm 7, a small-diameter timing pulley 92 fixed to the shaft portion 81 of the grip 8 rotatably held at the rotating end 71a of the handle arm 7; A timing belt 93 is provided stretched between the timing pulley 91 and the timing belt 93. Therefore, the transmission ratio and transmission direction of this differential transmission mechanism 9 are such that when the handle arm 7 is stopped, the grip 8 rotates in the same direction at a ratio other than 1:1 when the grip 8 is driven. It is set so that it can be transmitted to. That is, in this embodiment, the effective diameter of the large-diameter timing pulley 91 is set to twice the effective diameter of the small-diameter timing pulley 92, and when the handle arm 7 is stopped, the grip 8 rotations are transmitted to the drive shaft 6 in the same direction at a ratio of 2:1.

With such a configuration, the grip 8 can freely rotate relative to the handle arm 7 when the handle is not being operated. Therefore, a pressing force acts on the rack body 3 and the running wheels 5
Even if a reverse driving force acts on the drive shaft 6 from the side, the handle arm 7 will not rotate. That is, the rotation of the drive shaft 6 is differentially distributed between the handle arm 7 and the grip 8 via the differential transmission mechanism 9, but the handle arm 7 is maintained in a hanging state due to gravity. The grip 8 is in an unloaded state if the frictional resistance of each part is ignored. Therefore, when the drive shaft 6 rotates, the grip 8 rotates idly, and the handle arm 7 is held in the hanging position by gravity.

On the other hand, hold the grip 8 and
When the handle arm 7 rotates clockwise one rotation, when observed based on the coordinates set in space, the grip 8 does not rotate, the handle arm 7 rotates one rotation clockwise, and the drive shaft 6 rotates clockwise. It will rotate 1-1/2 = 1/2 in the circular direction. Similarly, when the grip 8 is gripped and the handle arm 7 is operated counterclockwise one rotation, the drive shaft 6
rotates 1/2 turn counterclockwise. Therefore,
By gripping the grip 8 and rotating the handle arm 7 in a desired direction, the running wheels 5 are driven and the rack body 3 is moved in the desired direction.

In this state, if you stop the operation and release your hand from the grip 8, the handle arm 7 of this grip 8
The load that restrains rotation on the axis disappears. Therefore, no matter what rotational state the drive shaft 6 is in, no restraining force is applied to the handle arm 7. As a result, the handle arm 7 self-returns to the hanging position due to gravity. At that time, the grip 8 rotates idly to absorb the difference in rotation between the drive shaft 6 and the handle arm 7. In this embodiment, when the handle arm 7 is self-returning from the substantially top position to the hanging position while the drive shaft 6 is stopped, the grip 8 will idle approximately once. Therefore, with such a device, no matter what position the handlebar operation is stopped, the handlebar arm 7
As a result, the handle arm 7 can be smoothly returned to the hanging position by itself.

Note that the shapes of the handle arm and grip, as well as the structure of the differential transmission mechanism, are not limited to the illustrated embodiments, and can be modified in various ways without departing from the spirit of the present invention.

[Effects of the Invention] Since the present invention has the above-described configuration, when the handle arm is rotated by gripping the grip, the rotational force in any direction can be reliably transmitted to the running wheels via the drive shaft. However, when the grip is released and the rotation operation is stopped, even if a reverse driving force is applied to the drive shaft from the traveling wheel side, the handle arm is no longer driven by that force.
Furthermore, when the grip is released, the handle arm automatically returns to the hanging position due to gravity. In addition, since there is no place where the power is interrupted or interrupted by engaging or disengaging the claw or wedge member, the above-mentioned functions can be carried out smoothly. Therefore, it is possible to effectively solve the problem of the handle arms of the driven rack bodies rotating on their own axis and causing harm to people nearby, and the problem of the handle arms of stationary rack bodies being uneven and unsightly. You can get the effect that you can.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram for clearly explaining the configuration of the present invention. Figures 2 to 4 show an embodiment of the present invention, with Figure 2 being an overall front view, Figure 3 being a front view showing an enlarged main part, and Figure 4 being a sectional view of the same side. . 4... Handle device, 5... Running wheel, 6...
Drive shaft, 7... Handle arm, 8... Grip, 9... Differential transmission mechanism, 51... Transmission element (sprocket), 52... Transmission element (chain).

Claims (1)

[Claims] 1. A drive shaft connected to the running wheel via a transmission element, a handle arm mounted to the drive shaft so that it can freely rotate so that it can hang down due to gravity when not restrained, and a rotating end of the handle arm. The grip is equipped with a grip mounted so as to be freely rotatable, and a differential transmission mechanism provided between the grip, the handle arm, and the drive shaft, and the grip can rotate while the hand arm is stopped. , the transmission ratio and transmission direction of the differential transmission mechanism are set so that the transmission can be transmitted to the drive shaft in the same direction at a ratio of n:1 (where n is a positive value other than 1). Features a handle device for moving racks, etc.