JPH0448043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a handle drive device that can be suitably used in handle racks used in offices, libraries, etc. as substitutes for storage cabinets, bookshelves, and the like.

[Prior Art] This type of handle rack has a plurality of rack bodies each having a handle for manual operation mounted on a rail laid on the floor via running wheels so as to be movable 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 movement allowance remains when the rack bodies are brought into close contact with each other. 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 connected to the running wheels of the rack body through a handle drive device comprising a chain, gears, etc., and by manually rotating the handle, the rack body can be moved. It is designed to move on rails.

[Problems to be Solved by the Invention] By the way, in such a device, when the handle of a specific rack body is rotated to move that rack body, other rack bodies closely adjacent to the rack body may be moved. It is not uncommon for other rack bodies that are also pressed to be pressed to follow. In such cases, if a handle drive device is used in which the handle and the running wheels are connected only through a transmission element such as a chain, the handle of the driven rack body may rotate as the rack moves. Become.
Therefore, it is easy to cause unexpected injuries to people standing in the vicinity, or accidents such as getting clothes caught in them.

Therefore, the steering wheel drive device has a function that ensures that the rotational force from the steering wheel side is transmitted to the running wheels in either direction, but that the reverse driving force from the running wheels side to the steering wheel side is not transmitted. It is desirable that this be granted.

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

Recently, various types of handle drive devices have been developed that have such functions, but all of the conventional devices have complicated structures, are difficult to operate reliably, and lack reliability.

The present invention aims to solve these problems.

[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, the handle drive device for a handle rack according to the present invention is interposed between a manually operated handle and a running wheel, and includes a rotating shaft that responds to the rotation of the handle, and a rotating shaft that responds to the rotation of the handle. a driven rotary body that is rotatably mounted on the shaft and connected to the running wheel via a transmission element; a drive rotor extending in the direction of the drive rotor, and a drive rotor positioned between the drive rotor and the driven rotor and mounted on the rotary shaft so as to be rotatable, the tip thereof being substantially the same as the drive rotor. an intermediate rotary body extending in the direction; and a tooth profile provided on the driven rotary body with a pair of pawls that are pivotally supported at the tip of the intermediate rotary body and rotate about an axis orthogonal to the rotation axis. an auto-return mechanism that elastically urges the drive piece toward a neutral position in which the claws do not engage with the toothed portion; It is characterized by comprising a motion conversion mechanism that converts a positional deviation in a rotational direction with respect to the body into a rotational motion of the driving piece.

[Function] With this configuration, when the handle is not operated, the driving piece held on the intermediate rotating body is removed from the tooth profile provided on the driven rotating body by the urging force of the auto-return mechanism. The driven rotary body is spaced apart and can freely rotate with respect to the rotating shaft. Therefore, even if a pressing force is applied to the rack body and a reverse driving force is applied from the traveling wheel side, it will not be transmitted to the handle. Therefore, there is no problem of the handle rotating when it is not being operated.

On the other hand, when the handle is rotated, the rotation axis begins to rotate accordingly. At that time, there is a gap between the drive rotor, which rotates together with this rotating shaft, and the intermediate rotor, which tries to stay at the lowest position due to the gravity acting on the center of gravity that has shifted downward and the gravity acting on the drive piece. Misalignment is about to occur. Then, by the action of the motion conversion mechanism, the displacement motion is converted into a rotational motion of the drive piece, and the drive piece rotates around an axis perpendicular to the rotation axis against the urging force of the auto-return mechanism. However, one of the claws approaches the driven rotating body. Then, when rotated by a certain angle, the claw portion meshes with the toothed portion,
The intermediate rotating body is connected to the driven rotating body via the driving piece, and rotation of the driving piece is prevented. When the rotational movement of the drive piece is blocked, the reaction force therefrom makes it impossible for the drive piece and the drive rotating body to move further out of position. Therefore, when the drive rotor rotates due to the operation of the handle, the intermediate rotor and the drive piece follow it with a positional shift of a certain angle, and the intermediate rotor is driven by the drive piece. transmitted to the rotating body. Therefore, the rotational operating force applied to the handle is transmitted to the running wheels via the rotating shaft, the driving rotating body, the driving piece of the intermediate rotating body, the driven rotating body, and the transmission element, making it possible to move the rack body. becomes.

When the operation is stopped and the handle is released from this state, a force that tries to cause a positional shift between the drive rotary body and the intermediate rotary body, in other words, one of the claws of the drive piece is driven The force that tries to rotate the rotating body so as to approach it is lost. Therefore, the claw portion of the driving piece is separated from the toothed portion by the urging force of the auto-return mechanism, and the connection between the driving piece and the driven rotating body is released. Therefore, in this state, even if the rack body is pressed and the running wheels rotate, the rotation will not be transmitted to the handle. It is possible that the force may not disappear immediately due to the influence of gravity, etc. acting on the handle, but if the handle is in a state where it can be rotated by an appropriate amount due to the reverse driving force from the running wheels due to the inertia of the rack body, etc. There will always be an opportunity for the force to disappear and the driving piece to be released from the driven rotating body.

Moreover, with such a device, even when the handle is released at any position, it is possible to reliably return the handle to the lower end position by itself. That is, the handle, the driving rotary body, and the intermediate rotary body holding the driving piece at the tip thereof extend in substantially the same direction, although there is a slight positional shift as described above. Therefore, when the engagement between the drive piece and the toothed portion of the driven rotor is released, the handle, the drive rotor, and the intermediate rotor move to the lowest position due to the gravity acting on the center of gravity that is deviated toward the extension side. I will be returning.

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

This handle rack has a plurality of rack bodies 4 having handles 3 mounted on parallel rails 2 laid on a floor 1 via running wheels 5. A handle drive device 6 is provided within each rack body 4.

As shown in FIG. 4, the rack main body 4 is in the form of a bookshelf with both sides 4a open in the direction of movement, and has an operation panel 4b on its front surface. A handle 3 is provided on the operation panel 4b, so that rotational operating force applied to the handle 3 can be transmitted to the running wheels 5 via the handle drive device 6.

The handle drive device 6 includes a rotating shaft 7 that responds to the handle 3, a sprocket 8 as a driven rotating body mounted on the rotating shaft 7, and a driving rotating body fixed to the rotating shaft 7 opposite to the sprocket 8. 9
and an intermediate rotary body 11 located between the driving rotary body 9 and the sprocket 8 and mounted on the rotary shaft 7; A driving piece 10 that selectively engages claw portions 10a and 10b forming a shape with a toothed portion 8a provided on an end surface of the sprocket 8, and this driving piece 1.
an auto-return mechanism 12 that elastically holds the 0 at a neutral position as shown in FIG.
It is equipped with.

The rotating shaft 7 is supported horizontally within the rack body 4 via a bearing 16, and one end 7 thereof
a is made to penetrate the operation panel 4b and protrude to the outside. The handle 3 is fixed to the protruding end 7a of the rotating shaft 7. The handle 3 includes a boss portion 3a fixed to the rotating shaft 7, an arm portion 3b extending from the boss portion 3a, and a grip portion 3c provided at the tip of the arm portion 3b.

The sprocket 8 is rotatably mounted near the other end of the rotating shaft 7, and is prevented from moving in the axial direction by a locking ring 17. This sprocket 8 is connected to a chain 18 which is a transmission element.
It is connected to the running wheels 55 via.

The drive rotor 9 is rod-shaped and is fixed to the rotating shaft 7 so as to face the sprocket 8 . That is, this drive rotary body 9 has a locking collar 9a and a threaded portion 9b on the base end side, and the rotating shaft 7 is passed through the base end side, and the threaded portion 9b is screwed into the nut 9c. It is fixed by

The intermediate rotating body 11 includes a boss portion 11a that is rotatably mounted on the outer periphery of the rotating shaft 7, and a boss portion 11a that is rotatably mounted on the outer periphery of the rotating shaft 7.
The shaft portion 11b extends from the outer periphery of the shaft portion 1a in the same direction as the direction in which the driving rotary body 9 extends.

As shown in FIG. 2, the driving piece 10 is Y-shaped in plan view, with its center portion 10c being pivotally supported by the tip of the shaft portion 11b of the intermediate rotating body 11, and is a pair on the sprocket 8 side. The rotation end is connected to the claw portion 10.
a, 10b. And this drive piece 1
0 rotates in forward and reverse directions around the axis of the shaft portion 11b perpendicular to the rotating shaft 7, so that either of the pawl portions 10a, 10b forms an annular tooth shape on the end surface of the sprocket 8. It is adapted to be able to selectively engage with the portion 8a.

The auto-return mechanism 12 includes, for example, a pair of torsion springs 12a and 12b whose operating range is defined by a stopper or the like (not shown), and the drive piece 10 rotates counterclockwise in FIG. When the torsion spring 12
an elastic biasing force is applied to the drive piece 10 in the direction of the neutral position, and when the drive piece 10 rotates clockwise in the figure, the other torsion spring 12b applies an elastic biasing force to the drive piece 10 in the direction of the neutral position. is now being granted.

The motion conversion mechanism 13 includes an engagement groove 13 in a rotation end 10d of the drive piece 10 extending in the direction of the drive rotary body 9.
a is bored, and the driving rotary body 9 is inserted into this engagement groove 3a.
The leading end 9d of the driving rotor 9 is loosely fitted into the inner wall 13 of the matching groove 13a.
b, 13c can be selectively abutted.

It should be noted that the drive piece 10 has its claw parts 10a, 1
0b to a position where it can completely mesh with the toothed portion 8a, the tip portion 9 of the drive rotary body 9
The dimensions of each part are set so that d does not come off the engagement groove 13a.

With such a configuration, when the handle 3 is not operated, it is held on the intermediate rotating body 11 by the elastic biasing force of the auto-return mechanism 12, as shown in FIGS. 1 and 2. The drive piece 10 is held in a neutral position, and its both claws 1
0a and 10b are tooth profile portions 8 provided on the sprocket 8
The sprocket 8 is separated from the rotating shaft 7
It is possible to idle freely against. Therefore, even if a pressing force is applied to the rack body 4 from the left and right directions in FIG. 4 and the running wheels 5 are rotated, the rotation only causes the sprocket 8 to spin idle.
It is not transmitted to the handle 3. Therefore,
It is possible to eliminate the problem that when moving a specific rack body 4, even the handle 3 of the rack body 4 that is pressed and driven by the rack body 4 rotates.

Moreover, since the driving rotary body 9 and the intermediate rotary body 11 are made to extend in the same direction as the extending direction of the handle 3, the handle 3 that is not being operated
Due to gravity, they all end up at the lowest position. Therefore, not only the appearance becomes very good, but also the starting position of the initial operation becomes constant, and the operability is improved.

On the other hand, when the handle 3 is rotated, the rotating shaft 7 begins to rotate accordingly. At this time, a positional shift in the rotational direction is caused between the driving rotary body 9, which rotates together with the rotary shaft 7, and the intermediate rotary body 11 and the driving piece 10, which tend to remain at the lowest position due to gravity. Then, the tip end 9d of the drive rotary body 9 presses one inner wall 13b of the engagement groove 13a of the drive piece 10. As a result, the drive piece 10 rotates in the direction of arrow X against the urging force of the auto-return mechanism 12. and,
When rotated by a certain angle, as shown in Figure 3,
One claw portion 10a of this drive piece 10 completely meshes with the toothed portion 8a of the sprocket 8, and the drive piece 10 is connected to the sprocket 8 and further rotation is prevented. When the rotational movement of the driving piece 10 is prevented in this way, the positional deviation movement between the intermediate rotating body 11 and the driving rotating body 9 is no longer likely to occur. Therefore, when the drive rotary body 9 is rotated by operating the handle 3,
The driving piece 10 is held by the intermediate rotating body 11 and follows it while being shifted by a certain angle, and the rotation of the intermediate rotating body 11 and the driving piece 10 is transmitted to the sprocket 8. Therefore, the rotational operating force applied to the handle 3 is transmitted to the running wheels 5 via the rotating shaft 7, the driving rotating body 9, the driving piece 10 of the intermediate rotating body 11, the sprocket 8 and the chain 18, and the rack body 4 is It is possible to move it to the right or left. In addition,
Once such a transmission system is formed, as long as the handle 3 is continued to be operated, the torque required to drive the traveling wheels 5 will cause the drive rotary body 9 to move into the engagement groove 13a. inner surface 13b,
It will be strongly pressed against 13c. Therefore, the connection between the drive piece 10 and the sprocket 8 will not be released due to the influence of gravity or the like.

From this state, when the operation is stopped and the handle 3 is released, the driving piece 1 of the driving rotating body 9 and the intermediate body 11
0, in other words, the tip end 9d of the drive rotor 9
Drive piece 1 by pressing inner surfaces 13d and 13c of 3a.
The force that tries to press the claw portions 10a, 10b of 0 against the toothed portion 8a is energized. Therefore, the driving piece 10 is rotated toward the neutral position by the urging force of the auto-return mechanism 1, and the connection between the driving piece 10 and the sprocket 8 due to the engagement between the claws 10a and 10b and the toothed part 8a is released. Ru.

However, this thing has a small mass, and
Since the power is intermittent by the drive piece 10, which exclusively performs rotational motion with little resistance, the operation is easier than, for example, when the power is intermittent by reciprocating a large mass part. Therefore, more reliable power intermittent operation is possible.

When the connection between the drive piece 10 and the sprocket 8 is released in this way, the gravity acting on the intermediate rotation member 11, the drive piece 10 and the drive rotation 9, and the gravity acting on the handle 3 cause the handle 3 self-returns to the lowest position and returns to its original state.

The shape of the drive piece 10 is set so that the conditions are exactly the same for clockwise rotation and counterclockwise rotation, so even if the handle 3 is rotated in the wrong direction,
Exactly the same operation is obtained.

As a modification of the motion conversion mechanism, an engagement groove may be provided on the tip end side of the driving rotor, and a protrusion that loosely fits into the engagement groove may be provided at the rotating end of the drive piece. It will be done.

Furthermore, the forms of the driven rotary body, intermediate rotary body, and driving rotary body can be modified in various ways without departing from the spirit of the present invention.

[Effects of the Invention] Since the present invention has the above-described configuration, it is possible to reliably transmit operating force in any direction from the handle side to the running wheels, but reverse drive from the running wheels side is not possible. The power transmission function that does not transmit power to the handle, and the function that the handle automatically returns to its normal position when the handle operation is stopped, are reliably achieved by using the rotational movement of the drive piece that can be operated easily. It is possible to effectively solve the problem that the handles of the driven rack bodies rotate on their own axis and cause harm to people nearby, and the problems that the handles of the stationary rack bodies are uneven and unsightly. Accordingly, it is possible to provide a handle drive device for a handle rack.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side sectional view of the handle drive device, FIG. 2 is an enlarged sectional view taken along line A-A in FIG. 1, and FIG. 3 corresponds to FIG. 2. FIG. 4 is a front view of the handle rack. 3... Handle, 4... Rack body, 5... Running wheel, 6... Handle drive device, 7... Rotating shaft, 8... Driven rotating body (sprocket), 8a...
...Tooth profile portion, 9...Driving rotating body, 10...Driving piece,
10a, 10b...Claw portion, 11...Intermediate rotating body,
12... Auto return mechanism, 13... Motion conversion mechanism, 18... Transmission element (chain).

Claims (1)

[Claims] 1 A handle drive device for a handle rack interposed between a manually operated handle and a running wheel, which includes a rotating shaft that responds to the rotation of the handle, and a transmission element that is rotatably mounted on this rotating shaft. a driven rotary body connected to the running wheel via the driven rotary body; and a drive fixed to the rotary shaft opposite to the driven rotary body, the tip of which extends in substantially the same direction as the direction in which the handle extends. a rotating body; an intermediate rotating body located between the driving rotating body and the driven rotating body; the intermediate rotating body is rotatably mounted on the rotating shaft; the distal end thereof extends in substantially the same direction as the driving rotating body; and a pair of pawls that are pivotally supported at the tip of the intermediate rotating body and rotate about an axis perpendicular to the rotating shaft to selectively engage toothed portions provided on the driven rotating body. A drive piece, an auto-return mechanism that elastically biases the drive piece in the direction of a neutral position in which the claws do not engage with the toothed part, and a rotational positional deviation between the intermediate rotary body and the drive rotary body. 1. A handle drive device for a handle rack, comprising a motion conversion mechanism that converts a motion into a rotational motion of the drive piece.