JPH0318977Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] 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 a substitute 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 particular 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 injuries to people standing nearby, or 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. Ideally, it should return to its original position and be held in that position.

Recently, various devices with such functions have been developed, but all conventional devices have complicated structures and are difficult to operate reliably, tend to have large handle arms, and are unreliable. The problem is that it lacks sex. 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 problem] In order to achieve the above purpose, the present invention
The following configuration is adopted.

That is, the handle device for a mobile rack or the like according to the present invention includes a drive shaft connected to a running wheel via a transmission element, and a shaft mounted on the drive shaft so that it can freely rotate under the force of gravity when not restrained. a handle arm which is attached to the rotating end of the handle arm, a grip that is freely rotatable at the rotating end of the handle arm, a proximal gear fixed to the drive shaft, a distal gear fixed to the shaft of the grip, and a distal gear fixed to the shaft of the grip; and odd-numbered idle gears that are mutually meshed and pivotally connected to the handle arm so as to transmit the rotation of the gears to the proximal gear, and the grip when the handle arm is stopped. The invention is characterized in that the rotation can be transmitted to the drive shaft at a ratio other than 1:1.

[Function] With this configuration, the grip can freely rotate with respect to the handle arm when the handle is not operated. Therefore,
Even if a reverse driving force is applied to the drive shaft from the traveling wheel side due to the pressing force of the rack body, etc., the entire handle will not rotate. That is, the rotation of the drive shaft is differentially distributed between the handle arm and the grip via the proximal gear, idle gear, and distal gear, whereas the handle arm is maintained in a hanging state due to gravity. The grip is then in an unloaded state. Therefore, when the drive shaft rotates,
The grip is idle, and the handle arm is
Gravity will hold it in its hanging position.

On the other hand, when the grip is gripped and the handle arm is rotated, the drive shaft begins to rotate accordingly. That is, the rotation of the distal gear is transmitted to the proximal gear as rotation in the same direction via the odd-numbered idle gears. However, if we consider the case where the handle arm is rotated one turn clockwise by grasping the grip, the result will be as follows. First, the ratio of the number of rotations of the grip to the number of rotations of the drive shaft when the handle arm 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, the grip rotates once in the counterclockwise direction, and the drive shaft also rotates counterclockwise. 1/ in the rotation direction
It will rotate n times. Converting this to a coordinate set in space as a reference, the grip does not rotate, the handle arm rotates once clockwise, and the drive shaft rotates clockwise once.
It will rotate by 1/n. A similar effect can be obtained even when the handle is operated in the opposite direction. Therefore, when the grip is gripped and the handle arm is rotated, the drive shaft rotates correspondingly, and the traveling wheels are driven.

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

In this case, a transmission mechanism for obtaining the above-mentioned effect can be constructed simply by arranging a plurality of stages of idle gears in a row between the proximal gear and the distal gear. Furthermore, it is also possible to make all or most of the idle gears have the same shape, thereby significantly reducing the number of component parts and making the handle arm slender. I can do it.
It is also possible to make the idle gear that meshes with the tip gear made of metal and the other idle gears made of synthetic resin, by making them different materials. It is also possible to add the function of a weight to the idler gear made of aluminum. Therefore, the force for self-returning the handle arm to the hanging position can be ensured without making the rotating end of the handle arm thick or making the grip heavy.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

This moving rack has a plurality of rack bodies 3 having handle devices 4 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 the front surface thereof. A handle device 4 is provided in this operation panel 3b portion.

As shown in FIGS. 1 and 2, 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 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 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 protrusion 6a of the drive shaft 6.
A proximal gear 91 fixed to the grip 8 and a distal gear 92 fixed to the shaft 81 of the grip 8 are meshed with each other to transmit the rotation of the distal gear 92 to the proximal gear 91. Handle arm 7
Odd-numbered idle gears 93 ₁ to 93 ₇ are rotatably attached to the shafts through support shafts 94 ₁ to 94 ₇ . The respective gears 91, 92, 93 ₁ to 93 ₇ are all spur gears, and the tip side gear 92 and the first stage idle gear 93 ₁ that meshes with this gear 92 are made of metal. , other idle gears 93 ₂ ~
93 ₇ and the proximal gear 91 are made of synthetic resin.

In addition, in this embodiment, the first stage idle gear 93 ₁ has a large diameter portion 93 ₁ a that meshes with the tip side gear 92, and a second stage idle gear 9
3 ₂ and a small diameter portion 93 ₁ b that meshes with the small diameter portion 93 1 b. The large diameter portion 93 ₁ a has an effective diameter 1.5 times that of the tip side gear 92, and the small diameter portion 93 ₁ b has the same effective diameter as the second stage idle gear 93 ₂ . and,
Idle gear 93 ₂ from the 2nd stage to the 7th stage
_-937 have the same effective diameter, and the proximal gear 91 has _{an effective diameter four times that of these idle gears 932-937 .} Therefore, the rotation of the grip 8 while the handle arm 7 is stopped is transmitted to the drive shaft 6 in the same direction at a ratio of 6:1.

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. This results in a 1-1/6 rotation in the rotational direction. Similarly, when the grip 8 is held and the handle arm 7 is operated one turn counterclockwise, the drive shaft 6 is rotated 1-1/6 times counterclockwise. Therefore, by gripping the grip 8 and rotating the handle arm 7 in a desired direction, the running wheels 5 can be rotated.
is driven, and the rack body 3 is moved in a 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 drive shaft 6 is stopped and the handle arm 7 is rotated 90 degrees from the horizontal position to self-return to the hanging position, the grip 8 is 90/360
= 1.5 spins. Therefore, with such a device, no matter what position the handlebar operation is stopped, the restraint of the handlebar arm 7 is reliably released, and the handlebar arm 7
can be smoothly returned to the hanging position by itself.

Further, in this embodiment, the first stage idle gear 93 ₁ that meshes with the tip side gear 92 is made of metal, and the other idle gears 93 ₂ to 9 are made of metal.
Since 3 ₇ is made of synthetic resin, the weight of the entire device can be reduced. That is, if this is done, the idle gear 93 ₁ will play the role of a weight provided on the rotating end 72a side of the handle arm 7. Therefore, it is possible to ensure sufficient self-returning force of the handle arm 7 to the hanging position without making the rotating end 72a of the handle arm 7 thick or making the grip 8 heavy. can. Therefore, the weight of the handle device as a whole can be reduced.

Furthermore, since the idle gears 93 ₂ to 93 ₇ from the second stage to the seventh stage have the same shape, the number of types of parts is reduced, and manufacturing can be performed easily and inexpensively.

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

Further, the type of idle gear is not limited to the above-mentioned type, and may be, for example, as shown in FIG. 4, FIG. 5, or FIG. 6. That is, the fourth
The handle device 104 shown in the figure includes a proximal gear 19
The odd number of idle gears 193 1 to 193 ₇ interposed between the idle gear ₁ and the tip gear 192 are all the same. In this way, the types of parts can be further reduced, and the handle arm 107 can be made even more slender.

On the other hand, _the handle device ₂₀₄ shown in _FIG . The idler gear ₂₉₃₇ is designed to have a large diameter portion and a small diameter portion for speed reduction. In this way, it becomes easy to set the aforementioned ratio n to a large value, the reaction force acting on the grip 8 can be reduced, and the rotation speed of the drive shaft can be brought close to the rotation speed of the handle arm. be able to. Further, the handle device 304 shown in FIG.
Among the idle gears 393 ₁ to 393 ₇ interposed between 91 and the tip side gear 392, the first stage idle gear 393 ₁ and the intermediate idle gear 393 ₃ are provided with a large diameter part and a small diameter part. It is used for deceleration. In this way, the same effect as shown in FIG. 5 can be obtained, and since the idle gears 393 ₁ and 393 ₃ having a large volume are arranged near the rotation end of the handle arm 7, This makes it easier to exert the weight effect of the idle gear as described above.

[Effects of the invention] Since the invention has the above-described configuration, when the handle arm is rotated by gripping the grip, the rotational force in either direction is 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. Since this device does not have any parts where power is continued by engaging and disengaging claws or wedge members, 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.

Moreover, since this device is capable of performing the above-mentioned operation using only a plurality of gears,
It is possible to easily share and standardize parts, and to easily manufacture inexpensive and highly reliable products.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being an enlarged front view of the main parts, Figure 2 being a sectional view of the same side, and Figure 3 being a front view of the whole. . FIG. 4 is a front view corresponding to FIG. 1 showing another embodiment of the present invention. 5 and 6 are schematic side sectional views showing still other embodiments of the present invention, respectively. 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), 104
...handle device, 107 ...handle arm,
191...Proximal gear, 192...Distal gear,
193 ₁ ~ 193 ₇ ...Idle gear. 204...
Handle device, 291... proximal gear, 292...
...Distal end gear, 293 ₁ to 293 ₇ ... Idle gear, 304 ... Handle device, 391 Proximal end gear, 392 ... Distal end gear, 393 ₁ to 393 ₇ ...
...Idle gear.

Claims (1)

[Claims for Utility Model Registration] (1) A drive shaft connected to the running wheels via a transmission element, and a handle arm mounted to the drive shaft so that it can freely rotate under the influence of gravity when not restrained. , a grip attached to the rotating end of the handle arm so that it can freely rotate; a proximal gear fixed to the drive shaft; a distal gear fixed to the shaft of the grip; and a rotation of the distal gear. and odd-numbered idle gears that are mutually meshed and pivotally connected to the handle arm so as to transmit the power to the proximal gear, and the rotation of the grip is prevented when the handle arm is stopped. , a handle device such as a moving rack, characterized in that it is configured to be able to transmit power to the drive shaft at a ratio other than 1:1. (2) A handle device for a moving rack or the like according to claim 1, wherein the idle gear that directly meshes with the tip side gear is made of metal, and the other idle gears are made of synthetic resin. . (3) The handle device for a moving rack or the like according to claim 2, wherein the other idle gears all have the same shape.