JPH0466763B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a hand handle device that can be suitably used as a relatively lightweight mobile rack used in offices and libraries as a substitute for storage cabinets, bookshelves, etc. It is.

[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 via a chain, gears, etc. ing. Therefore, by gripping 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 rotating the handle of a specific rack body 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 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, 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 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, with this type of handle device, for example, when the movable rack is relatively light, it is possible to suppress the reaction force acting on the grip as much as possible while allowing the rack to move a sufficiently large amount with a small amount of handle operation. It may be necessary. Therefore, it is desirable to have a structure that can easily handle such usage.

Moreover, when manually operating lightweight moving racks, etc. to secure the necessary passage between desired moving racks, the moving racks, etc. that have been left in an intermediate position due to a change of mind during the operation may be moved during operation. It is often the case that it is pressed by a rack and made to follow. In this case, it is desirable that the movable rack to be driven be capable of starting to be driven without significant resistance from the moment it collides with the movable rack being operated.

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

[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 is rotatably mounted on the handle arm 7 so as to be freely rotatable so as to be able to hang down from the handle arm 7; Differential transmission mechanism 9 provided
The difference is such that the rotation of the grip 8 when the handle arm 7 is stopped can be transmitted to the drive shaft 6 at a ratio of n:1 (where n≧4). The transmission ratio of the drive mechanism 9 is set, and the transmission means 50 is the speed increaser 5.
It is characterized by having 4.

[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, whereas 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. The relationship will be explained as follows, taking as an example a case where the rotation of the grip 8 is set to be transmitted to the drive shaft 6 in the same direction. That is, when gripping the grip 8 and rotating the handle arm 7 once in the clockwise direction is observed based on the coordinates set on the handle arm 7, the grip 8 rotates once in the counterclockwise direction. However, the drive shaft 6 also rotates 1/n in the counterclockwise direction. Converting this based on the coordinates set in space,
The grip 8 does not rotate, the handle arm 7 rotates once clockwise, and the drive shaft 6 rotates 1-1/n clockwise. And even if you operate the steering wheel in the opposite direction,
An effect similar to this can be obtained. 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.

Note that the above effect can be obtained in the same way when the rotation of the grip 8 is set to be transmitted in the opposite direction to the drive shaft 6, but in this case, the grip 8 is gripped and the handle arm 7 is When the drive shaft 6 rotates clockwise once, the drive shaft 6 rotates clockwise by 1+
This results in a 1/n rotation, and a similar effect can be obtained for operations in the opposite direction.

Since the transmission element 50 has the speed increaser 54, the handle arm 7 can be gripped by gripping the grip 8.
When the rack body 3 is rotated, the amount of handle operation is amplified and transmitted between the drive shaft 6 and the running wheels 5, and a larger amount of movement is obtained for the rack body 3.

Here, since the grip 8 is connected to the differential transmission mechanism 9, grip holding torque acts as a reaction force from the drive shaft 6. The grip holding torque changes depending on the set value of the ratio n, and when configured so that the rotation of the grip 8 is transmitted in the same direction to the drive shaft 6, the grip holding torque changes as indicated by the broken line in FIG.
If the rotation of the grip 8 is configured to be transmitted in the opposite direction to the drive shaft 6, the ratio will be as shown by the broken line _B2 in FIG. ₃ . Show characteristics. In both figures, the value T ₁ corresponds to the torque required to directly grip and rotate the drive shaft 6, and the solid lines A ₁ , A ₂
shows the ratio characteristic of the number of rotations of the drive shaft 6 when the handle arm 7 is rotated once. and,
As is clear from both figures, when the ratio n has a value of 4 or more, this grip holding torque is not significantly affected by the value of n and is held at a much smaller value with respect to T ₁ . . Therefore, even if the load torque on the drive shaft 6 increases due to the provision of the speed increaser 54 (that is, even if T ₁ increases), the grip holding torque is so large that it adversely affects operation. You can easily set it so that it does not occur. In other words, in the region where n is 4 or more, the torque of the drive shaft
Since the grip holding torque exhibits a very small value with respect to T ₁ , it is possible to increase the rotation speed of the handle arm and transmit it to the traveling wheels without increasing the grip holding torque excessively.

Note that the drive shaft 6 connected to the handle arm 7
and the speed increaser 54 interposed between the traveling wheels 5 and the traveling wheels 5.
When the movable rack or the like is driven by a pressing force, it functions as a speed reducer that transmits the reverse driving force from the running wheels 5 to the drive shaft 6 side. Therefore, due to the presence of the handle device 4, a large braking force is not applied to the running wheels 5, and it becomes possible to start the moving rack and the like relatively easily.

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

<First Embodiment> (FIGS. 4 to 6) The handle device of this embodiment is constructed so that the rotation of the grip 8 is transmitted to the drive shaft 6 in the same direction. As shown in FIGS. 4 to 6, the mobile rack has a plurality of rack bodies 3 each having a handle device 4 placed on parallel rails 2 laid on a floor 1 via running wheels 5. .

As shown in FIG. 4, 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. 5 and 6, 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 speed increaser 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. 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. Note that a cover (not shown) is attached to the opening 71b formed in the base end 71.

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; The timing belt 93 is stretched between a timing pulley 91 and a timing belt 93, and a pair of guide pulleys 94 are rolled into contact with the outer surface of the timing pulley 93. Therefore, the transmission ratio and transmission direction of the differential transmission mechanism 9 are such that the rotation of the grip 8 when the handle arm 7 is stopped is the same as that of the drive shaft 6.
The signals are set so that they can be transmitted in the same direction at a ratio of n:1 (for example, n=5). That is, in this embodiment, the large diameter timing pulley 9
This is achieved by setting the effective diameter of the timing pulley 1 to five times the effective diameter of the small diameter timing pulley 92.

The speed increaser 54, which forms part of the transmission means,
For example, it is a gear type, and as shown in FIG. 4, the operation input transmitted by a chain 52 is transmitted to an internal gear train (not shown) through a sprocket 54a, and the rotation is accelerated by this gear train. The rotation of the sprocket 54b is transmitted to the running wheels 5 via the chain 53.

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. This results in a rotation of 1-1/5 = 0.8 in the rotational direction. Similarly, when the grip 8 is gripped and the handle arm 7 is operated counterclockwise one rotation, the drive shaft 6
rotates counterclockwise by 1-1/5=0.8. Therefore, hold the grip 8 and move the handle arm 7.
By rotating the rack in a desired direction, the running wheels 5 are driven, and the rack body 3 is moved in the desired direction.

Furthermore, when the operation is stopped and the grip 8 is released from this state, the load that restricts the rotation of the grip 8 with respect to the handle arm 7 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, this handle arm 7 is
It self-returns to the hanging position due to gravity. At that time, the grip 8 rotates idly and the drive shaft 6
This will absorb the difference in rotation between the handle arm 7 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 idles 5×1/4 times. It turns out. 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, the operation input from the handle 7 is applied to the speed increaser 5.
4, when grip 8 is gripped and handle 7 is rotated, rack body 3 will move more as the speed increases, even if the amount of operation is small. In this case, the grip holding torque for rotating the handle arm 7 is only 1/5 of the torque T ₁ required when rotating the drive shaft 6 by directly gripping it, so it is Even if the load torque of the drive shaft 6 increases, it is easy to prevent the grip holding torque from becoming so large that it adversely affects operation. Therefore, with this device, the rack body 3 can be moved quickly and significantly with a slight operation of the handle, and particularly excellent effects can be obtained when the rack body 3 is relatively lightweight.

<Second Embodiment> (FIGS. 7 and 8) The handle device of this embodiment is constructed so that the rotation of the grip 8 is transmitted to the drive shaft 6 in the opposite direction. The moving rack used is the same as that used in the first embodiment (see FIG. 4). Also, Figures 7 and 8
The figures correspond to FIGS. 5 and 6, respectively, and show the handle device of this embodiment, and common parts are given the same reference numerals and their explanations are omitted.

As shown in both figures, the differential transmission mechanism 9 includes a large-diameter gear 99 fixed to the protruding end 6a of the drive shaft 6, and is rotatably supported at an intermediate position of the handle arm 7 via a support shaft 95. A small diameter gear 97 that meshes with the diameter gear 99, a large diameter timing pulley 98 that is integrally provided with its axis aligned with the small diameter gear 97 and has a larger effective diameter than the small diameter gear 97, and the handle arm 7. A small-diameter timing pulley 92 is fixed to the shaft portion 81 of the grip 8 which is freely rotatably held at the rotating end 72a of the grip 8, and a timing belt 96 is stretched between the small-diameter timing pulley 92 and the large-diameter timing pulley 98. It will be equipped. Therefore, the transmission direction of the differential transmission mechanism 9 is such that rotation of the grip 8 when the handle arm 7 is stopped can be transmitted to the drive shaft 6 in the opposite direction. There is. In this embodiment, for example, the effective diameter of the large diameter gear 99 is set to five times the effective diameter of the small diameter gear 97, and the effective diameter of the large diameter timing pulley 98 is set to be five times the effective diameter of the small diameter gear 97. It is set to twice the effective diameter so that the rotation of the grip 8 when the handle arm 7 is stopped is transmitted to the drive shaft in the opposite direction at a ratio of 10:1. The same speed increaser as that described in the first embodiment is used.

With such a configuration, the first
Similarly to the embodiment, when the handle is not operated, the handle arm 7 is freely rotatable, so it is held in the hanging position by gravity, and even if it is urged by another rack body 3 and follows it, it will not move accordingly. Therefore, the handle arm 7 will not rotate. On the other hand, when gripping the grip 8 and rotating the handle arm 7 clockwise (or counterclockwise), the operation is slightly different from that of the first embodiment, and the drive shaft 6 rotates clockwise (or counterclockwise). 1+1/10 in the rotation direction)
= 1.1 rotations and the rack body 3 moves, but if you let go of your hand from this state, the handle arm 7 is also released from its restraint, so it also moves as the grip 8 spins idly. It will surely return to the hanging position.

As in the first embodiment, the operation input from the handle arm 7 is amplified via the speed increaser 54, so when the grip 8 is gripped and the handle arm 7 is rotated, the amount of operation of the handle is small. Even if it is, the rack body 3 will move more, so it is particularly effective when the load is light. Here, the grip holding torque for gripping the grip 8 and rotating the handle arm 7 is only 1/10 of the torque _T1 required when gripping and rotating the drive shaft 6 directly.
Even if the load torque on the drive shaft 6 increases due to the provision of the speed increaser 54, the grip holding torque does not increase to the extent that it adversely affects operation.

Although the embodiments of the present invention have been described above, the type and structure of the speed increaser, the shape of the handle arm and grip, the structure of the differential transmission mechanism, etc. are not limited to the illustrated embodiments. Various modifications can be made without departing from the spirit of the 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 is possible to quickly move the rack body etc. with a small amount of operation of the handle arm without making the grip holding force excessively large. This has the effect that it can be particularly suitably applied when the material is relatively lightweight.

Moreover, the speed increaser installed between the drive shaft and the running wheels is used to transmit the reverse driving force from the running wheels to the drive shaft when the moving rack etc. is driven by a pressing force. Since it functions as a speed reducer, the presence of the handle device prevents a large braking force from acting on the running wheels. Therefore,
A movable rack, etc., left in an intermediate position can be pressed by the movable rack during manual operation and made to follow easily, making it possible to effectively improve the operability of relatively lightweight movable racks, etc. .

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram for clearly showing the configuration of the present invention, and FIGS. 2 and 3 are operation explanatory diagrams showing the operation of the present invention. 4 to 6 show a first embodiment of the present invention, FIG. 4 is an overall front view, and FIG.
The figure is a front view showing an enlarged view of the main part, and FIG. 6 is a sectional view of the same side. 7 and 8 show a second embodiment of the present invention, with FIG. 7 being a front view corresponding to FIG. 5, and FIG. 8 being a side sectional view corresponding to FIG. 6. 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 (speed increaser).

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 of the differential transmission mechanism is set so that the transmission is transmitted to the drive shaft at a ratio of n:1 (however, n≧4), and the transmission means has a speed increaser. A handle device for a moving rack, etc., characterized by: