JPH01122811A - Handle device for moving rack or the like - Google Patents

Abstract

PURPOSE:To make the return of a handle sure and also, improve operatability by specifying respectively the size of a handle arm made raceable against a travel wheel drive shaft and the size of a raceable grip at its tip, and arranging so that the rotation of the grip may be transmitted to the drive shaft at a predetermined transmission ratio. CONSTITUTION:The radius of curvature L of a handle arm 7 is made about 200mm and the handle arm 7 is provided raceably at a drive shaft 6, and the radius r of a grip 8 is made about 15mm and the grip 8 is fitted raceably to the arm 7. As a result, when the grip 8 is held and the handle arm 7 is rotated, the drive shaft 6 is rotated at a transmission ratio n:1 (n is 12<=n<=13) which is determined by a small diameter timing pulley 92, a large diameter timing pulley 91, a guide pulley 94 and a differential transmission mechanism 9, which makes travel carwheels travel. And, when the grip 8 is freed, the grip 8 becomes raceable against the arm 7, and the handle arm 7 returns to a hanging down position due to self-weight. Thus, returning surely to a definite position is made, and also operatability can be improved.

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] This type of mobile rack is mounted on rails laid on the floor.
It is known that a plurality of rack bodies each having a handle for manual operation are mounted on running wheels so as to be movable in the thickness direction. In this case, the thickness and number of rack bodies are set relative to the rail length so that the required amount of movement remains when the rack bodies are brought into close contact with each other. 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.

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

[Problems to be Solved by the Invention] By the way, in such a movable 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 a case, if the handle and the running wheel 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 accidents such as causing unexpected injury to people standing nearby or 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 the above object, the present invention employs the following configuration.

That is, as shown in FIG. 1, the handle device for a movable rack or the like according to the present invention includes a driving wheel (5) and a transmission element (5).
1), a drive shaft (6) connected via (52), and a drive shaft (6) with an effective radius of approximately 200 degrees, which is mounted so that it can freely rotate under the influence of gravity when not restrained. A handle arm (7), a grip (8) with a radius of about 15 degrees that is freely rotatably attached to the rotating end of the handle arm (7), the grip (8), the handle arm (7), and the drive and a differential transmission mechanism (9) provided between the shafts (6), so that the rotation of the grip (8) when the handle arm (7) is stopped is controlled by the drive shaft (6). ) at a ratio of n:1 (however, 12≦n≦13), the transmission ratio of the differential mechanism (9) is set.

[Function] With this configuration, when the handle is not being operated, the grip (8) is connected to the handle arm (7).
), it is possible to idle freely. Therefore, even if a pressing force acts on the rack 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 suspended due to gravity. , while the grip (8) is in an unloaded state. Therefore,
When the drive shaft (6) rotates, the grip (8) will idle and the handle arm (7) will be held in its hanging position by gravity.

Meanwhile, hold the grip (8) and remove the handle arm (7).
When the rotation operation is performed, the drive shaft (6)
begins to rotate. 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 in the same direction to the drive shaft (6). That is, hold the grip (8) and turn the handle arm (7) once in the clockwise direction, and then rotate the handle arm (7).
) When observed based on the coordinates set above, the grip (8) rotates once in the counterclockwise direction, and the drive shaft (6) similarly rotates 1/n in the counterclockwise direction. become. If this is converted based on coordinates set in space, the grip (8) does not rotate, the handle arm (7) rotates once clockwise, and the drive shaft (6) rotates clockwise. This results in a 1-1/n rotation in the direction. A similar effect can be obtained even when the handle is operated in the opposite direction. In this way, if you grip the grip (8) and rotate the handle arm (7), the drive shaft (6) will rotate correspondingly, and the running wheels (
5) will be 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 action is caused by the rotation of the grip (8) being caused by the drive shaft (
The same result can be obtained when the power is set to be transmitted in the opposite direction to 6), but in this case, when gripping the grip (8) and rotating the handle arm (7) once in the clockwise direction, The drive shaft (6) will rotate l+l/n clockwise.

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 a case in which the rotation of the grip (8) is set to be transmitted in the same direction to the drive shaft (6), and the grip (8) is gripped and the handle arm (7) is moved as described above. The relationship between the number of rotations of the drive shaft (6) when rotating once and the ratio n is shown by a solid line A, and the relationship between the grip holding torque necessary for performing such an operation and the ratio n Dashed line B
It is shown in Here, the value T1 corresponds to the torque required to directly grip and rotate the drive shaft (8).

As is clear from this drawing, when the ratio n approaches 1, the solid line A rapidly drops and approaches zero. That is, even if the handle arm (7) is rotated once, the drive shaft (6) approaches a state in which it does not rotate at all. Conversely, the ratio n
As becomes larger, 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. However,
In the region where the ratio n is less than 4, the handle arm (7)
The rotation speed of the drive shaft (6) is small compared to the rotation speed of the grip (8), and the reaction force acting on the grip (8), that is, the grip holding torque is 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 knob arm (7),
Moreover, the reaction force acting on the grip (8) becomes small. Therefore, no excessive operating force is required.
The handle arm (7) can be rotated.
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 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 rotation speed of the drive shaft (6) increases significantly relative to the rotation speed of the handle arm (7), and the handle arm (7) The force required to rotate the grip 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 the range of approximately 4 or more.

At the same time, the ratio n is preferably approximately 40 or less for the following reasons. That is, if you release your hand from the grip (8) while rotating the handle arm (7), no matter which direction the transmission direction is set, the grip (8) will move as described above. )
While rotating idly, the handle arm (7) returns to the hanging position due to gravity. At that time, the grip (8)
The rotation of the handle arm (7) is accelerated by n times and rotates idly. That is, the handle arm (7
), for example, when the grip (8) self-returns from the horizontal position to the hanging position, the grip (8) rotates 1/4Xn times. Therefore, if this ratio n is set to a large value exceeding 40, the handle arm (
7) It takes time to return to the hanging position by itself,
It may happen that it does not return to the hanging position accurately. To prevent this, it is necessary to make the rotating end side of the handle arm (7) heavier, but if it is too heavy, it will adversely affect the operability. On the other hand, if the ratio n is set to a value of approximately 40 or less, the tip side of the handle arm (7) does not have to be so heavy that it adversely affects operability. ) can be smoothly returned to the hanging position by itself.

Furthermore, even if n is a value (4 to 40) that satisfies the above conditions, the following problems with operability still remain. That is, when gripping the grip (8) and rotating the handle arm (7), in addition to the grip holding torque necessary for the grip (8) to rotate, the operator's hand must naturally , the arm rotation torque necessary to rotate the handle arm (7) acts simultaneously. When the former becomes larger than the latter to a certain extent, the grip (8)
When the operating force is applied manually, the grip (8) rotates before the handle arm (7) rotates, and the grip (
8) will roll around in your hand, resulting in a lack of stability. On the other hand, if the latter becomes larger than the former, the grip (8) will no longer work even if the handle arm (7) is rotated.
Since the rotation of the grip (8) does not accompany this, it gives a feeling of operation as if the grip (8) is spinning in the hand.
) will need to be held firmly.

On the other hand, the effective radius of the handle arm (7) is approximately 200n+m, and the radius of the grip (8) is approximately 15I.
If the value of the ratio n is selected to be in the range of 12 to 13, the grip holding force and the arm rotation force become approximately equal. In other words, the force that should be applied to the outer peripheral surface of the grip (8) to prevent it from slipping in the hand and the force that should be applied in the tangential direction to rotate the handle arm (7) are approximately equal. Become. Therefore, in this case, the force applied via the grip (8) is applied to the handle arm (
7) and the grip (8), and both try to rotate and rotate under the optimum force relationship for the operator, making it possible to operate the handle smoothly instead of feeling strange.

The effective radius of the handle arm and the radius of the grip were determined to be approximately 200 mm each through repeated tests by the inventor.
It is limited to m+m and approximately 15m+sl to provide the best operating feel for the average normal adult.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment (FIGS. 4 to 6) The handle device of this embodiment is configured 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 handle device 4 mounted on parallel rails 2 laid on a floor 1.
A plurality of rack bodies 3 having the same diameter are mounted via running wheels 5.

As shown in FIG.
It is in the form of a bookshelf with opening a, and has an operation panel 3b on the front. A handle device 4 is provided in this operation panel 3b portion.

The handle device 4, as shown in FIGS. 4 and 5,
A drive shaft 6 connected to the traveling wheel 5 via a sprocket 51 and a chain 52 as transmission elements, a handle arm 7 rotatably mounted on the drive shaft 6, and a rotating end 72a of the handle arm 7. A grip 8 is attached to the handle arm 7 so as to freely rotate, 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 has one end 6a extending through the operation panel 3b and protruding 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 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. It is designed to be stably held in the hanging position shown in the figure. The effective radius of this handle arm 7 is set to 200 mm. Further, the opening 71b formed in the base end portion 71 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. And the radius r of the grip is 15ff
There are 11 settings.

The differential transmission mechanism 9 includes a large-diameter timing pulley 91 fixed to the protruding end 6a of the drive shaft 6, and the handle arm 7.
A small diameter timing pulley 92 fixed to the shaft portion 81 of the grip 8 which is freely rotatably held at the rotating end 71a of the grip 8, and this small diameter timing pulley 92 and the large diameter timing pulley 9.
The timing belt 93 is stretched between the timing pulley 93 and the timing belt 93, and a pair of guide pulleys 94 are in rolling contact with the outer surface of the timing pulley 93. However,
The transmission ratio and transmission direction of this differential transmission mechanism 9 are such that rotation of the grip 8 when the handle arm 7 is stopped is transmitted to the drive shaft 6 in the same direction at a ratio of 12.5:1. It is set so that it can be used. That is,
In this embodiment, the effective diameter of the large diameter timing pulley 91 is 12 times the effective diameter of the small diameter timing pulley 92.
This is achieved by setting the value to 5 times.

With such a 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 body 3 and a reverse driving force acts on the drive shaft 6 from the traveling wheel 5 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.

That is, even if there is some frictional resistance in the rotation of the grip 8, the grip 8 will resist the rotation of the drive shaft 6 by 12
．． Since the speed is only increased five times, the frictional resistance does not become a large load. 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, when the grip 8 is gripped and the handle arm 7 is rotated clockwise one rotation, when observed based on the coordinates set in space, the grip 8 does not rotate and the handle arm 7 rotates clockwise. direction, and the drive shaft 6 rotates 1-1712.5-0.92 in the clockwise direction. Similarly, when the grip 8 is held and the handle arm 7 is rotated counterclockwise by one rotation, the drive shaft 6 is rotated counterclockwise by 1-1/12.5
= 0.92 rotations. By gripping the grip 8 and rotating the handle arm 7 in a desired direction using the force i, the running wheels 5 are driven and the rack body 3 is moved 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 the operation requires excessive force. There is no need for

Moreover, since the ratio n is set to 12.5, the grip holding force and the arm rotation force are equal.

Therefore, the grip 8 fits well in the hand, providing 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 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, the drive shaft 6
When returning the handle arm 7 by itself from the horizontal position to the hanging position while the handle arm 7 is stopped, for example,
The grip 8 rotates idly 12.5 times 90/360 times. 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 moved to the hanging position. It can be self-recovered.

Furthermore, the effective radius 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 that the handlebars can be operated with ease in cases where this type of handlebar operation is required. You will gain sex.

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. A movable rack similar to that used in the first embodiment (see FIG. 4) is used. In addition, although FIGS. 7 and 8 show the 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 a nozzle arm 7.
A small-diameter gear 97 is rotatably supported via a support shaft 95 at an intermediate position and meshes with the large-diameter gear 99; A large-diameter timing pulley 98 having an effective diameter, a small-diameter timing pulley 92 fixed to the shaft portion 81 of the grip 8 which is freely rotatably held at the rotating end 72a of the noddle arm 7, and this small-diameter timing pulley 92. The timing belt 96 is stretched between the large diameter timing pulley 99 and the timing belt 96.

Therefore, the transmission direction of this differential transmission mechanism 9 is different from that of the grip 8 when the handle arm 7 is stopped.
The structure is such that the rotation of the drive shaft can be transmitted in the opposite direction to the drive shaft. The first aspect of this embodiment is that, 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. 92 and the rotation of the grip 8 in a state where the handle arm 7 is stopped is transmitted to the drive shaft in the opposite direction at a ratio of 12.5:1. (The ratio of the effective diameter of the large diameter 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 the two is As long as the relationship is between 12 and 13, the condition is satisfied regardless of the setting.)

With this 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. Then, grasp the grip 8 and rotate the handle arm 7 in a clockwise direction (
or counterclockwise), the situation is slightly different from the first embodiment, and the drive shaft 6 rotates 1+1/12.5 clockwise (or counterclockwise). Become. However, in this case as well, grip 8
The grip holding torque for gripping and rotating the handle arm 7 is only 1/12.5 of the torque T1 required when gripping and rotating the drive shaft 6 directly. This means that no force is required. Further, in this case as well, the grip holding force and the arm rotation force are approximately equal, and good characteristics can be obtained in the grip feeling and the operability of the grip 8. Furthermore, since the effective diameter of the handle arm 7 and the diameter r of the grip 8 are each 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 returns to the hanging position reliably, as in the previous embodiment.

The embodiments of the present invention have been described above, but the shapes of the handle arm and grip, and the structure of the differential transmission mechanism are
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 following configuration, when the handle arm is rotated by holding the grip, the rotational force in any direction is reliably applied 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 the 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 200+nm.
The radius of the s-grip is set to about 50 aug, and the rotation of the grip when the handle arm is stopped is limited so that it is transmitted to the drive shaft at a ratio of about 12.5:1. Not only does this eliminate the inconvenience of the handle arm becoming extremely heavy or 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.

Furthermore, as an active measure to obtain even better operability, we have limited the effective diameter of the handle arm to approximately 2゜Omm and the diameter of the grip to approximately 15mm, making it easy for the average adult to use. This provides the best operability.

[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;
The figure is a front view of the whole, FIG. 5 is a front view showing an enlarged main part, and FIG. 6 is a sectional view of the same side. Also, Figures 7 and 8
The figures 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] A drive shaft connected to the running wheel via a transmission element, a handle arm with an effective radius of approximately 200 mm that is mounted on the drive shaft so that it can freely rotate under the force of gravity when not restrained, and the handle arm of the handle arm. The grip includes a grip with a radius of approximately 15 mm that is freely rotatable at the rotating end, and a differential transmission mechanism provided between the grip, the handle arm, and the drive shaft, and stops the handle arm. The rotation of the grip in the state is n:1 to the drive shaft.
A handle device for a movable 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).