JPH0466762B2 - - 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 for relatively heavy moving racks used in offices and libraries as a substitute for storage cabinets, bookshelves, etc. It is something.

[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 passages between adjacent rack bodies through which people can enter and exit, the rack bodies can be used as storages or the like as appropriate.

The handle of each rack body is generally provided with a grip at the rotating end of the handle arm, and the drive shaft of the handle is connected to the running wheels of the rack body through a chain, gears, etc. has been done. 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 device for the same, when the handle arm of a specific rack body is rotated to move the rack body, the rack body is moved in close contact with and adjacent to the rack body. It is not uncommon for other rack bodies to be pressed and made to follow.
In such a case, if the handle and the running wheels are connected only through a chain or the like, 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, rotational force from the handle arm side is reliably transmitted to the running wheels in either direction, but reverse driving force from the running wheels side to the handle side is not transmitted. It is desirable to provide the following.

Furthermore, with such devices, if the handle that is not being operated stops at various positions, it is unsightly and has a negative effect on operability. It would be ideal to return to .

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.

In addition, when it comes to moving racks that can be substituted for storage rooms, bookshelves, etc., there are many large ones that are taller than a human being and have a depth of several meters. Furthermore, when necessary items are stored in the rack, the weight becomes even heavier. Therefore, in order to be able to manually operate the handle even in such a case, it is essential that the handle device takes measures against the weight in addition to the above-mentioned problems.

It is an object of the present invention to solve the above-mentioned conventional problems and at the same time to realize a handle device such as a moving rack that can be suitably applied to the above-mentioned case.

[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, as shown in FIG. 1, 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 a transmission means 50, and a gravitational force applied to the drive shaft 6 when not restrained. a handle arm 7 that is rotatably mounted on a shaft so as to be able to hang down from the handle arm 7; a grip 8 that is rotatably attached to the rotating end of the handle arm 7; the grip 8, the handle arm 7 and the drive shaft 6; The rotation of the grip 8 when the handle arm 7 is stopped is applied to the drive shaft 6 at a ratio of n:1 (n is a positive value). )
The transmission ratio and transmission direction of the differential transmission mechanism 9 are set so that transmission can be performed in the opposite direction, and the transmission means 50 is characterized by having a reduction gear 54.

[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, if we consider the case where the grip 8 is grasped and the handle arm 7 is rotated one turn clockwise, the situation will be as follows. First, when this movement is observed based on the coordinates set on the handle arm 7, the grip 8 rotates counterclockwise once, and the drive shaft 6 rotates clockwise by 1/n. It will rotate. If this is converted based on coordinates set in space, the grip 8 does not rotate and the handle arm 7
rotates once in the clockwise direction, and the drive shaft 6 rotates 1+1/n clockwise. A similar effect can be obtained even when the handle is operated in the opposite direction. In this way, when the grip 8 is gripped and the handle arm 7 is rotated, the drive shaft 6 is rotated correspondingly, and the traveling wheels 5 are driven.

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.

Since the transmission means 50 has the reducer 54, the operating force when gripping the grip 8 and rotating the handle arm 7 is applied to the drive shaft by the boosting action of the reducer 54. 6 and the running wheels 5.

Here, since the grip 8 is connected to the differential transmission mechanism 9, a grip holding torque acts on the grip 8 as a reaction force from the drive shaft 6. In FIG. 2, solid line A shows the relationship between the rotation speed of the drive shaft 6 and the ratio n when the handle arm 7 is rotated once by gripping the grip 8 as described above. The relationship between the grip holding torque required in this case and the ratio n is shown by a broken line B. Further, the value _T1 corresponds to the torque required to directly grip and rotate the drive shaft 6.

As is clear from this figure, when the ratio n approaches 0, both the solid line A and the broken line B rapidly rise toward infinity, and as the ratio n increases, they approach 1 and the value T ₁ , respectively. That is, it can be seen that the relationship between the rotational speed of the drive shaft 6 and the grip holding torque tends to be less influenced by the value of n and settles down to a substantially constant ratio (1:T ₁ in this case). Therefore, such properties are extremely useful in device design. That is,
The relationship between the rotation speed of the drive shaft 6 and the grip holding torque is one of the major factors that determines the handle operability of the device, but this relationship is variable and is only good for a specific value of n. If operability is to be obtained, the structure and dimensions of the differential transmission mechanism 9, which determine the value of n, are thereby limited. This significantly reduces the degree of freedom in design. However, in this case, the rotational speed of the drive shaft 6 and the grip holding torque are maintained in a constant relationship over a wide range of n, so that the above-mentioned restrictions are not imposed. Therefore, the reducer 5
It has the advantage of being able to be designed and applied in various ways without being limited to the value of n, while also taking into account the relationship with 4.

In particular, according to the present invention, it is possible to put it to practical use not only in the area where n is 4 or more, where the grip holding torque is relatively small, but also in the area where n is less than 4, where the grip holding torque is extremely large. Therefore, the degree of freedom in designing the differential transmission mechanism 9 can be greatly expanded. Specifically, when the grip 8 and the drive shaft 6 are configured to rotate in opposite directions as in the present invention, the grip holding torque increases rapidly as n approaches 0. With the same tendency, the number of rotations per unit time of the drive shaft 6 also increases rapidly. When designing such a handle device, in order to keep the grip holding torque within the limit of the operator's grip strength, it is necessary to use a reduction gear 54 having a large reduction ratio as n approaches 0, but a differential transmission mechanism is required. As described above, the rotational speed of the drive shaft 6 outputted from the drive shaft 6 increases in the same manner as n approaches 0, so even if the reduction ratio of the reducer 54 is set to a large value, an appropriate operating state can be ensured. becomes possible.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 3 to 5.

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. 3, the rack main body 3 is in the form of a bookshelf with both sides 3a open 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. The rack body 3 is quite large, with a top plate that is taller than a human being and a depth of several meters.

As shown in FIGS. 4 and 5, the handle device 4 is connected to the running wheels 5 via a sprocket 51 and chains 52, 53, which are transmission means, and a reducer 54, which will be described later, which is also a transmission means. A drive shaft 6, a handle arm 7 rotatably mounted on the drive shaft 6, and a handle arm 7.
The grip 8 is rotatably attached to the rotating end 72a of the handle arm 7, and a differential transmission mechanism 9 is 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. When not restrained, due to gravity acting on its own center of gravity which is eccentric to the extending portion 72 side, gravity acting on the grip 8 attached to the rotating end 72a of the extending portion 72, etc. It is designed to be stably held in the hanging position shown in the figure. 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 gear 91 fixed to the handle arm 7; and a small-diameter gear 93 that is rotatably supported via a support shaft 92 at an intermediate position of the handle arm 7 and meshes with the large-diameter gear 91.
A large-diameter timing pulley 94 is provided integrally with the small-diameter gear 93 so that its axis coincides with the small-diameter gear 93 and has a larger effective diameter than the small-diameter gear 93, and a large-diameter timing pulley 94 is attached to the rotating end 72a of the handle arm 7 so as to be freely rotatable. A small-diameter timing pulley 95 fixed to the shaft portion 81 of the grip 8 held, and this small-diameter timing pulley 95
and a timing belt 96 stretched between the large diameter timing pulley 94 and the large diameter timing pulley 94. Therefore, the transmission direction of the differential transmission mechanism 9 is set so that the rotation of the grip 8 when the handle arm 7 is stopped can be transmitted to the drive shaft 6 in the opposite direction. . In this embodiment, the effective diameter of the large-diameter gear 91 is set to five times the effective diameter of the small-diameter gear 93, and the effective diameter of the large-diameter timing pulley 94 is set to be five times the effective diameter of the small-diameter timing pulley 95. The rotation of the grip 8 when the handle arm 7 is stopped is set to twice the diameter of the grip, and the rotation of the grip 8 when the handle arm 7 is stopped is
The signal is transmitted in the opposite direction at a ratio of 10:1.

The speed reducer 54, which forms part of the transmission means, is
For example, it is a gear type, as shown in Fig. 3, the operating force transmitted by the chain 52 is input to the internal gear train via the sprocket 54a, and is decelerated and output from the sprocket 54b. 53 so that the power can be transmitted to the running wheels 5.

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 a substantially unloaded state. Therefore, even if the drive shaft 6 rotates, the grip 8 simply rotates idly, and the handle arm 7 is held in a hanging state due to 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+1/10=1.1 in the rotational direction. Similarly, when the grip 8 is gripped and the handle arm 7 is operated one rotation counterclockwise, the drive shaft 6 rotates counterclockwise by 1+1/10=1.1 rotations.
Therefore, by gripping the grip 8 and rotating the handle arm 7 in a desired direction, the running wheels 5 are driven via the transmission means 50, 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 acts on 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 a horizontal position to a hanging position while the drive shaft 6 is stopped, the grip 8 is moved 10×1/4=2.5 times. You will end up idling. Therefore, with such a device, no matter what position the handlebar operation is stopped, the restraint of the handlebar arm 7 will be reliably released, and the handlebar arm 7 will be smoothly brought to the hanging position. It is possible to recover by yourself.

Furthermore, since the operation input from the handle 7 described above is boosted via the reducer 54, the grip 8
If the handle arm 7 is rotated while the rack body 3 is gripped, even if the rack body 3 is large and quite heavy, it can be moved by manual operation. Moreover, with this device, if the rotation of the drive shaft 6 is decelerated and transmitted to the running wheels 5, the grip holding force will be correspondingly reduced, so even when moving the heavy rack body 3, problems may occur. does not occur at all. Furthermore, by performing such deceleration, the rotational torque of the drive shaft 6 itself can be reduced, so even in a region where n, expressed as the rotation speed of the grip 8/the rotation speed of the drive shaft 6, is relatively small. It becomes possible to set the grip holding force to a practical value. Therefore,
Compared to the case where the reducer 54 is not used, it is possible to expand the range of values of n that can be put to practical use,
The degree of freedom in design can be increased.

Although one embodiment of the present invention has been described above,
The type and structure of the reducer, the shape of the handle arm and grip, the structure of the differential transmission mechanism, etc.
The present invention is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

[Effects of the Invention] Since the present invention has the above-described configuration, it is possible to prevent problems such as the handle arm of a driven rack body rotating on its own axis and causing harm to people nearby, or each rack body etc. that is stopped. At the same time, it solves the problem of uneven and unsightly handle arms, and allows you to reliably move large racks with a small amount of operating force. It is possible to provide an excellent handle device whose structure and dimensions can be selected at will.

In particular, in the present invention, the grip and the drive shaft are set to rotate in opposite directions, and a speed reducer is interposed between the drive shaft and the running wheels.
As mentioned above, it can be put to practical use not only in the range where n is 4 or more, where the grip holding torque is relatively small, but also in the range where n is less than 4, where the grip holding torque is extremely large. Therefore, a special effect can be obtained in that the degree of freedom in designing the differential transmission mechanism can be greatly expanded.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of the structure of the present invention, and FIG. 2 is an explanatory view of the operation of the present invention. Figures 3 to 5 show one embodiment of the present invention, with Figure 3 being an overall front view, Figure 4 being a front view showing an enlarged main part, and Figure 5 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, 50... Transmission means, 5
1... Transmission means (sprocket), 52, 53...
...Transmission means (chain), 54...Transmission means (reducer).

Claims (1)

[Claims] 1. A drive shaft connected to the running wheel via a transmission means, a handle arm mounted on the drive shaft so that it can freely rotate under the influence of gravity when not restrained, and a rotating end of the handle arm. The grip is equipped with a grip attached to be freely rotatable, and a differential transmission mechanism provided between the grip, the handle arm, and the drive shaft, and the grip is configured to rotate when the handle 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 opposite direction at a ratio of n:1 (n is a positive value), and the transmission means is a reduction gear. A handle device for a moving rack, etc., characterized by having: