JPH0436967B2 - - 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 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 drives 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 that rack body, it is difficult to move the rack body in close contact with the adjacent rack body. It is not uncommon for other rack bodies to be pressed and made to follow. In such cases, 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 rotates as the rack moves. As a result, it is easy to cause unexpected damage to people standing nearby, or to cause accidents such as getting clothes caught in the area.

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.

The present invention aims to solve these problems and at the same time realize a handle device with extremely good operability.

[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 transmission elements 51 and 52.
An effective radius of approximately 200 mm is mounted on the drive shaft 6 so that it can freely rotate under the influence of gravity when not restrained.
mm handle arm 7 and this handle arm 7
A grip 8 having a radius of approximately 15 mm is attached to the rotating end of the handle so that it can rotate freely, and a differential transmission mechanism 9 is provided between the grip 8, the handle arm 7, and the drive shaft 6. The rotation of the grip 8 while the arm 7 is stopped is
The drive shaft 6 has a ratio of n:1 (however, 12≦n≦
13) is characterized in that the transmission ratio of the differential mechanism 9 is set so that the transmission can be performed in the following manner.

[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. 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 to 1/n times 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+
It will rotate by 1/n.

Here, the reason why the ratio n is limited to a value of 12 to 13 will be explained. First, for the following reasons, it is desirable that the value of the ratio n be approximately 4 or more. Figure 2 shows the drive when gripping the grip 8 and rotating the handle arm 7 once as described above, when the rotation of the grip 8 is set to be transmitted in the same direction to the drive shaft 6. The relationship between the rotation speed of the shaft 6 and the ratio n is shown by a solid line A,
A broken line B shows the relationship between the grip holding torque necessary for performing such an operation and the ratio n. Here, the value T ₁ corresponds to the torque required to directly grip and rotate the drive shaft 8.
As is clear from this drawing, the solid line A represents the ratio n
When approaches 1, it drops rapidly and approaches zero.
In other words, even if the handle arm 7 is rotated once,
The drive shaft 6 approaches a state where it does not rotate at all.
Conversely, as the ratio n increases, the rate of increase gradually decreases and approaches 1. That is, when the handle arm 7 is rotated once, the drive shaft 6 approaches a state where it is rotated once. Therefore, in a region where the ratio n is less than 4, the rotation speed of the drive shaft 6 is smaller than the rotation speed of the handle arm 7, and the grip 8
The reaction force acting on the grip, that is, the grip holding torque becomes large. Therefore, the operating feeling is as if the drive shaft 6 is directly gripped and rotated, and the significance of adopting the handle structure is lost. Therefore, it is disadvantageous when moving a large load. On the other hand, if the ratio n is approximately 4 or more, the number of rotations of the drive shaft 6 will be close to the number of rotations of the handle arm 7,
Moreover, the reaction force acting on the grip 8 becomes small. Therefore, the handle arm 7 can be rotated without requiring excessive operating force,
The rotation of the handle arm 7 is effectively transmitted to the drive shaft.

On the other hand, in FIG. 3, the rotation of the grip 8 is caused by the rotation of the drive shaft 6.
This figure shows the relationship between the rotational speed of the drive shaft 6 and the grip holding torque with respect to the ratio n, in the case where the transmission is set in the opposite direction. As is clear from this drawing, when the ratio n approaches 0, the solid line A rapidly increases and aims at infinity. That is, the rotation of the handle arm 7 is transmitted to the drive shaft 6 at an increased speed, and the speed increase rate increases infinitely. However, in a region where the ratio n is less than 4, the number of rotations of the drive shaft 6 increases significantly relative to the number of rotations of the handle arm 7.
As in the case described above, the force required to rotate the handle arm 7 becomes large, and the grip holding torque also becomes large, which is inconvenient. Therefore, in this case as well, it is desirable that the ratio n be in a range of approximately 4 or more.

At the same time, the ratio n is preferably approximately 40 or less for the following reasons. In other words, if you release your hand from the grip 8 while the handle arm 7 is rotating, the grip 8 will rotate idly as described above, regardless of the transmission direction set. The arm 7 returns to the hanging position due to gravity. At this time, the grip 8 rotates idly at an n-times increase in speed relative to the rotation of the handle arm 7. That is, when the handle arm 7 is returned by itself from the horizontal position to the hanging position, for example,
The grip 8 rotates 1/4×n times. Therefore, if this ratio n is set to a large value exceeding 40, the handle arm 7 will be affected by the rotational resistance and inertia of the grip 8.
It may take a long time to self-return to the hanging position, or it may not return to the hanging position accurately. To prevent this, the handle arm 7
Although it is necessary to make the rotating end side heavier, making it too heavy will have a negative effect on operability. On the other hand, if the ratio n is set to a value of about 40 or less, the handle arm 7 can be moved to the hanging position without making the tip side of the handle arm 7 so heavy that it adversely affects the operability. This enables smooth self-recovery.

Furthermore, n is a value (4 to 4) that satisfies the above conditions.
40), the following problems with operability still remain. That is, when gripping the grip 8 and rotating the handle arm 7, there is a
In addition to the grip holding torque required to rotate the grip 8, the arm rotation torque required to rotate the handle arm 7 acts at the same time. When the former becomes larger than the latter to a certain extent, when the operating force is input from the grip 8, the rotation of the grip 8 becomes larger than the handle arm 7.
This occurs prior to the rotation of the grip 8, causing the grip 8 to roll in the hand and resulting in a lack of stability. On the other hand, if the latter becomes larger than the former, even if the handle arm 7 is rotated, the grip 8 will not rotate accordingly, giving a feeling that the grip 8 is spinning in the hand, which may cause the user to become unconscious. Then, it becomes necessary to grip the grip 8 firmly.

On the other hand, if the effective radius of the handle arm 7 is approximately 200 mm, the radius of the grip 8 is approximately 15 mm, and the value of the ratio n is selected in the range of 12 to 13, the grip holding force and arm rotation force are are approximately equal. That is, the force that must be applied to the outer peripheral surface of the grip 8 to prevent it from slipping in the hand and the force that must be applied in the tangential direction to rotate the handle arm 7 are approximately equal. Therefore, in this case, the force applied via the grip 8 is equally distributed between the handle arm 7 and the grip 8, and both try to rotate and rotate under the optimum force relationship for the operator. Therefore, it is possible to operate the steering wheel smoothly without feeling any discomfort.

The effective radius of the handle arm and the radius of the grip have been limited to approximately 200 mm and approximately 15 mm, respectively, through repeated tests by the inventor, to provide the best operating feel for an average normal adult. It's becoming like that.

[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 mounted on parallel rails 2 laid on a floor 1 via running wheels 5. There is.

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. 4 and 5, the handle device 4 includes a drive shaft 6 connected to the traveling 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 be freely rotatable. 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. 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 effective radius L of this handle arm 7 is set to 200 mm. Further, an unillustrated cover is attached to the opening 71b formed in the base end portion 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 radius r of the grip is set to 15 mm.

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; It comprises a timing belt 93 stretched between a timing pulley 91 and a pair of guide pulleys 94 rollingly connected to 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.
It is set so that the signals can be transmitted in the same direction at a ratio of 12.5:1. That is, this embodiment is realized by setting the effective diameter of the large diameter timing pulley 91 to 12.5 times the effective diameter of the small diameter timing pulley 92.

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. In other words, even if there is some frictional resistance in the rotation of the grip 8, the grip 8 is only accelerated 12.5 times as much as the rotation of the drive shaft 6, so the frictional resistance will not result in a large load. There isn't. Therefore, when the drive shaft 6 rotates, the grip 8 rotates idly, and the handle arm 7
Gravity will hold it in the hanging position.

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 1-1/12.5=0.92 in the rotational direction. Similarly, hold the grip 8 and move the handle arm 7 to 1.
When the rotation is rotated counterclockwise, the drive shaft 6 rotates counterclockwise by 1-1/12.5=
0.92 rotations. 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 rotated.
will move in the desired direction. in this case,
The grip holding torque for rotating the handle arm 7 is only 1/12.5 of the torque _T1 required when rotating the drive shaft 6 by directly gripping it, so excessive force is not required for operation. do not have. Furthermore, since the ratio n is set to 12.5, the grip holding force and arm rotational force are equal. Therefore, the grip 8 fits well in the hand and provides an exquisite operating feel.

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 12.5×90/360 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 effective radius L of the handle arm 7 and the radius r of the grip 8 are set to dimensions that are easiest for an average adult to handle, so they are perfect for this type of handle operation. This results in improved operability.

<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 same direction. The moving rack used is the same as that used in the first embodiment (see FIG. 4). Also, Figures 7 and 8
Although the figure shows a handle device, 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; 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, and a timing belt 96 is stretched between the small-diameter timing pulley 92 and the large-diameter timing pulley 99. It will be equipped.
Therefore, the transmission direction of the differential transmission mechanism 9 is such that the rotation of the grip 8 when the handle arm 7 is stopped can be transmitted to the drive shaft in the opposite direction. . 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. effective diameter
2.5 times, 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 12.5:1 (the large diameter gear The ratio of the effective diameter of the gear 99 to the effective diameter of the small diameter gear 97 and the ratio of the effective diameter of the large diameter timing pulley 98 to the small diameter timing pulley 92 are such that the product of both is 12 to 13. (The condition is satisfied no matter what setting there is.)

With such a configuration, the handle arm 7 is held in the hanging position by gravity when the handle is not operated, similarly to the first embodiment described above. When the grip 8 is gripped and the handle arm 7 is rotated one turn clockwise (or counterclockwise), the circumstances are slightly different from the first embodiment, and the drive shaft 6 is rotated clockwise (or counterclockwise). or counterclockwise) by 1+1/12.5 rotations. However, in this case as well, the grip holding torque for gripping the grip 8 and rotating the handle arm 7 is 1/12.5 of the torque T ₁ required when gripping and rotating the drive shaft 6 directly. Therefore, excessive force is not required for operation. Also, in this case, the grip holding force and arm rotational force are approximately equal,
Good grip feeling and operability of the grip 8 can be obtained. Furthermore, since the effective diameter L of the handle arm 7 and the diameter r of the grip 8 are set to the above-mentioned optimal dimensions, this device is the easiest for an average adult to handle. For example, when the operation is stopped from the horizontal position and the hand is released from the grip, the grip rotates 12.5 x 90/360 and reliably returns to the hanging position as in the previous embodiment.

Although the embodiments of the present invention have been described above, the shapes of the handle arm and grip, and the structure of the differential transmission mechanism are not limited to the illustrated embodiments, and may be modified in various ways without departing from the spirit of the present invention. is possible.

[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. Moreover, the effective radius of the handle arm is approximately 200mm, and the radius of the grip is approximately
50mm, and the rotation of the grip when the handle arm is stopped is limited to being transmitted to the drive shaft at a ratio of approximately 12.5:1, so the handle arm does not become extremely heavy. Not only does this eliminate the inconvenience of the grip not being able to return to the hanging position, but the grip fits well in the hand and does not slip or get caught.

As described above, the handle device of the present invention has problems such as the handle arms of the driven rack bodies rotating on their own axis and causing harm to people nearby, and the handle arms of the stationary rack bodies being uneven and unsightly. This provides an excellent effect of solving this problem and at the same time ensuring extremely exquisite operability.

In addition, as a proactive measure to obtain even better operability, the effective diameter of the handle arm has been increased to approximately 200 mm.
mm, and the grip diameter is limited to approximately 15 mm, which provides the best operability for the average adult.

[Brief explanation of drawings]

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, FIG. 5 is a front view showing an enlarged main part, and FIG. 6 is a sectional view of the same side. be. 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, 51... Transmission element (sprocket), 52... Transmission element (chain).

Claims (1)

[Claims] 1. A drive shaft connected to the running wheel via a transmission element, and an effective radius of approximately 200 mm that is mounted on the drive shaft so that it can freely rotate under the influence of gravity when not restrained.
mm handle arm, a grip with a radius of approximately 15 mm attached to the rotating end of the handle arm so as to freely rotate, and a differential transmission mechanism provided between the grip, the handle arm, and the drive shaft. The rotation of the grip when the handle arm is stopped is n:1 to the drive shaft.
A handle device for a moving rack or the like, characterized in that the transmission ratio of the differential transmission mechanism is set so that transmission can be performed at a ratio of (12≦n≦13).