JPH0448044B2 - - 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 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 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 often the case that both are pressed and driven. 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 rotational force from the steering wheel side in either direction is transmitted to the running wheels, but reverse driving force from the running wheels side to the steering wheel side is not transmitted. It is desirable that this be granted.

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 rotating body that is rotatably mounted on a shaft and connected to the traveling wheel via a transmission element; a driving rotating body that is fixed to the rotating shaft opposite to the driven rotating body; this driving rotating body and the driven rotating body; an intermediate rotating body positioned between the body and the rotary shaft so as to be rotatable; a drag applying mechanism that applies rotational drag to the intermediate rotating body;
A slider that is held through the intermediate rotating body so as to be slidable in the axial direction, an urging mechanism that urges the slider in a direction away from the driven rotating body, and the slider and the driving rotating body. a cam mechanism provided between the slider and the slider for converting a positional displacement movement in the rotational direction of the slider into a forward movement of the slider in the direction of the drive rotor; The present invention is characterized by comprising a clutch mechanism that prohibits displacement of the slider with respect to the driving rotor and connects the slider to the driven rotor.

[Operation] With this configuration, when the handle is not operated, the slider held on the intermediate rotating body is separated from the driven rotating body by the biasing force of the biasing mechanism, and the driven The rotating body is freely rotatable about 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 this time, a positional shift is likely to occur between the drive rotary body that rotates integrally with the rotating shaft and the intermediate rotary body whose rotation is resisted by the drag force applying mechanism. Then, by the action of the cam mechanism, the positional displacement movement is converted into a forward movement of the slider, and the slider moves forward in the direction of the driven rotor against the biasing force of the biasing mechanism. When the clutch mechanism moves forward by a certain distance, the clutch mechanism becomes connected, and the intermediate rotating body is connected to the driven rotating body via the slider, and the slider is prevented from moving forward. When the forward motion of the slider is blocked, further displacement of the intermediate rotary body and the drive rotary body becomes impossible due to the reaction. Therefore, when the drive rotating body is rotated by operating the handle, the intermediate rotating body follows it with a certain angle of displacement, and the rotation of the slider of this intermediate rotating body is caused by the clutch mechanism. is transmitted to the driven rotating body. Therefore, the rotational operating force applied to the handle is
It is transmitted to the running wheels via the driving rotor, the slider of the intermediate rotor, the driven rotor, and the transmission element, making it possible to move the rack body.

In this state, when the operation is stopped and the handle is released, a force that tries to cause a positional shift between the drive rotor and the intermediate rotor, in other words, a force that tries to advance the slider. disappear. Therefore,
The slider is moved backward by the urging force of the urging mechanism, and the connection between the slider and the driven rotating body by the clutch mechanism is released. Therefore, in this state,
Even if the rack body is pressed and the running wheels rotate,
The rotation is no longer transmitted to the handle.

Furthermore, when the handle is released and the connection between the slider and the driven rotating body is severed, whether the handle will return to a certain position by itself due to its own weight, etc. depends on the structure of the drag applying mechanism, etc. .

For example, if a drag applying mechanism is adopted in which a weight is extended from the outer periphery of the intermediate rotating body in substantially the same direction as the handle, no matter which position the handle is released, the It becomes possible to reliably return the handle to the lower end position by itself. In other words, in this configuration, the intermediate rotating body is stably held by gravity at the position where the weight hangs downward, so when the handle is started from the lower end position, the intermediate rotating body A drag force acts to prevent the drive rotating body from following the drive rotation body. Therefore, a positional shift is caused between the driving rotary body and the slider held by the intermediate rotary body, and it becomes possible to move the slider forward. Then, from the time when this slider is connected to the driven rotary body and cannot move forward, the intermediate rotary body having the weight will follow the driving rotary body that rotates together with the handle, and as described above. Transmission from the steering wheel to the running wheels becomes possible. When the handle is stopped from the stage where the handle is rotated in this way, the force that advances the slider is deenergized as described above, and the connection between the slider and the driven rotating body is released. . Although it is possible that the force may not disappear immediately due to the influence of gravity acting on the handle, if the handle is in a state where it can rotate an appropriate amount due to the reverse driving force from the running wheels due to inertia of the rack body, etc. There will always be an opportunity for the force to disappear and the slider to be released from the driven rotating body. When the intermediate rotating body and the driving rotating body are released from the driven rotating body in this way, the handle self-returns to the lowest position along with the weight due to the gravity acting on the weight and the gravity acting on the handle. I will do it.

[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, as shown in FIG.
A rotating shaft 7 that responds to the handle 3, and a sprocket 8 that is a driven rotating body mounted on the rotating shaft 7.
, a driving rotary body 9 fixed to the rotating shaft 7 facing the sprocket 8; and a driving rotary body 9.
and the sprocket 8 and mounted on the rotating shaft 7, and a drag applying mechanism 13 that applies rotational drag to the intermediate rotating body 11.
, a slider 10 held through this intermediate rotating body 11 , an urging mechanism 12 that urges this slider 10 in a direction away from the sprocket 8 , this slider 10 , and the drive rotating body 9 a cam mechanism 14 provided between the slider 10 and the sprocket 8;
and a clutch mechanism 15 provided between.

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 surface panel 4b and protrude to the outside. The handle 3 is fixed to the protruding end 7a of the rotating shaft 7. Handle 3 is
It consists of 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 5 via.

The drive rotary body 9 is fixed to the rotary shaft 7 so as to face the sprocket 8, and includes a boss portion 9a fixed to the outer periphery of the rotary shaft 7 and an angle of, for example, 180° on the outer periphery of the boss portion 9a. It consists of a pair of rod-shaped portions 9b that protrude in the radial direction from outlying positions with different phases.

The intermediate rotating body 11 is disk-shaped, and is mounted on the outer periphery of the rotating shaft 7 so as to be rotatable, and is prevented from moving in the axial direction by a locking ring 17. Then, a through hole 19 having a large diameter portion 19a on the driving rotary body 9 side is formed in a portion near the outer peripheral edge of the intermediate rotary body 11, for example, at a portion having a phase difference of 180°, parallel to the axis of the rotary shaft 7. These through holes 19
A slider 10 is slidably held therein. The slider 10 is accommodated in the large diameter portion 19a of the through hole 19, and its tip is connected to the drive rotating body 9.
The large diameter portion 10a that protrudes to the side and the through hole 1
The small diameter portion 10b is accommodated in the small diameter portion 19b of the sprocket 9 and has a tip thereof projected in the direction of the sprocket 8. These sliders 10 are prevented from rotating at a portion not shown in the drawings, and are prevented from slipping out of the through hole 19 by a locking ring 21.

The biasing mechanism 12 includes a compression coil spring 12a.
is wound around the outer periphery of the small diameter portion 10b of the slider 10 and interposed between the large diameter portion 10a of the slider 10 and the intermediate rotating body 11.

The drag applying mechanism 13 has a weight 13a extending from the outer periphery of the intermediate rotating body 11 in the same direction as the direction in which the handle 3 extends. The weight 13a is in the shape of an elongated rod, and its tip side is enlarged.

The cam mechanism 14 is provided with cam surfaces 14a and 14b that widen in a V shape toward the intermediate rotary body 11 at positions on the outer periphery of the end surface of the drive rotary body 9 that are different in phase by, for example, 180 degrees, and At the tip of the large diameter portion 10a of each slider 10, V-shaped engagement surfaces 14c and 14d are formed to slidably engage the corresponding cam surfaces 14a and 14b.

The clutch mechanism 15 is composed of one toothed portion 15a formed in an annular shape on the end surface of the sprocket 8, and a toothed portion 15b formed at the tip of the small diameter portion 10b of each slider 10. Child 1
0 moves forward in the direction of the sprocket 8, the toothed portions 15a, 15b mesh with each other.

Note that the sum (α+β) of the distance α between the tooth tips of both tooth profile portions 15a, 15b and the meshing depth β of both tooth profile portions 15a, 15b is the cam surface 1 of the cam mechanism 14.
It is set to a smaller value than the axial dimension γ of 4a and 14b.

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 compression coil spring 12a, as shown in FIGS. 1 and 2. The slider 10 is spaced apart from the sprocket 8, and the sprocket 8 can freely rotate with respect to the rotating shaft 7. Therefore, even if a pressing force acts on the rack body 4 from the left and right directions in FIG.
The signal only spins idly, and the signal is not transmitted to the handlebar 3. Therefore, when moving a specific rack body 4, it is possible to eliminate the problem that even the handle 3 of the rack body 4, which is pressed and driven by the rack body 4, rotates.

Moreover, in this embodiment, since the weight 13a protruding in the same direction as the handle 3 is used to apply the necessary rotational resistance to the intermediate rotating body 11 during operation, the handle 3 that is not being operated is affected by gravity. , all will be at the bottom. 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 integrally with the rotary shaft 7, and the intermediate rotary body 11, whose rotation is resisted by the weight 13a. Then, the engagement surface 14 provided at the tip of the slider 10 held by the intermediate rotating body 11
c, 14d are the cam surfaces 14a, 14 of the drive rotor 9
Start climbing while sliding b. As a result, the slider 10 is pressed in the forward direction X, and the slider 10 moves forward in the direction of the sprocket 8 against the biasing force of the compression coil spring 12a. When the slider 10 moves forward by a certain distance (α+β), the toothed portion 15b of the slider 10 completely meshes with the toothed portion 15a of the sprocket 8, as shown in FIG. It is connected to the sprocket 8 and is prevented from advancing further.
Note that the axial dimension γ of the cam surface 14a14b
is set larger than the advancing distance (α+β) of the slider 10, so at this stage, the engaging surfaces 14c and 14d are aligned with the cam surfaces 14a and 14.
It never deviates from b. When the forward motion of the slider 10 is blocked in this way, the engagement surface 14
c, 14d are the cam surfaces 14a, 14b
It becomes impossible for the intermediate rotating body 11 and the driving rotating body 9 to be displaced from each other any more. Therefore, when the drive rotary body 9 is rotated by operating the handle 3, the slider 10
The slider 10 is held by the intermediate rotating body 11 and follows it with a certain angle of displacement, and the rotation of the slider 10 is transmitted to the sprocket 8 via the clutch mechanism 15. Therefore,
The rotational operating force applied to the handle 3 is applied to the rotating shaft 7, the slider 10 of the drive rotating body 9, the intermediate rotating body 11,
It is transmitted to the running wheels 5 via the sprocket 8 and the chain 18, making it possible to move the rack body 4 to the right or left. Note that once such a transmission system is formed, as long as the operation of the handle 3 is continued, the torque required to drive the traveling wheels 5 will cause the engagement surface 14 to
c, 14d are strongly pressed against the cam surfaces 14a, 14b. Therefore, weight 13
The connection between the slider 10 and the sprocket 8 will not be released due to the gravity acting on a.

In this state, when the operation is stopped and the handle 3 is released, a force that tries to cause a positional shift between the drive rotor 9 and the slider 10 of the intermediate rotor 11, in other words, the engagement surface The force that presses the cam surfaces 14a, 14b and moves the slider 10 forward is deenergized by the cam surfaces 14c, 14d. Therefore, the slider 10 is moved backward by the biasing force of the compression coil spring 12a, and the connection between the slider 10 and the sprocket 8 due to the meshing of the toothed portions 15a and 15b is released.

However, this slider 10 has a small mass.
Since the clutch mechanism 15 is engaged and engaged by advancing and retreating, the operation is easier than, for example, when the clutch mechanism 15 is engaged and engaged by moving the entire intermediate rotating body 11 including the weight 13a back and forth in the axial direction. More reliable power intermittent action can be obtained.

When the connection between the slider 10 and the sprocket 8 is released in this way, the gravity acting on the weight 13a and the gravity acting on the handle 3 cause the handle 3 to move to the lowest position together with the weight 13a. It recovers by itself and returns to its original state.

Since the cam surfaces 14a, 14b and the engaging surfaces 14c, 14d of the cam mechanism 14 are set under exactly the same conditions for clockwise rotation and counterclockwise rotation, no matter which direction the handle 3 is rotated, no A similar operation can be obtained.

Note that the present invention also includes a device that uses a structure that applies braking to the intermediate rotating body by friction or the like as a drag force applying mechanism, but it is also possible to use a device that uses weights as in the above embodiment. For example, no matter what position the handle is stopped at, the handle can reliably return to its home position by itself.

Further, as a modification of the cam mechanism, a cam surface may be provided in a V-shape on the slider side, and an engagement surface that engages with the cam surface may be formed on the drive rotor side.

Further, the clutch mechanism is not limited to one having a toothed portion having a triangular cross section, but may use a toothed portion similar to a normal gear.

In addition, various modifications can be made to the forms of the driven rotary body, intermediate rotary body, and driving rotary body without departing from the spirit of the present invention.

[Effects of the Invention] Since the present invention has the above-described configuration, operating force in any direction from the handle side can be reliably transmitted to the running wheels, but reverse driving force from the running wheels can be transmitted to the running wheels. It is possible to achieve the power transmission action of not transmitting it to the handle without requiring any special clutch switching operation, and by using the minimum movement of mechanical elements with small mass. To provide a handle drive device for a handle rack that can reliably eliminate the problem of the handle rotating on its own axis and causing harm to people nearby.

[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), 9...
Drive rotating body, 10... Slider, 11... Intermediate rotating body, 12... Biasing mechanism, 12a... Compression coil spring, 13... Drag imparting mechanism, 13a... Weight, 14... Cam mechanism, 15...Clutch mechanism, 18...Transmission element (chain).

Claims (1)

[Scope of Claims] 1. A handle drive device for a handle rack interposed between a manual operation handle and a running wheel, which includes a rotating shaft that responds to the rotation of the handle, and a rotating shaft capable of idling on this rotating shaft. a driven rotary body mounted on a shaft and connected to the traveling wheel via a transmission element; a driving rotary body fixed to the rotating shaft facing the driven rotary body; and the driving rotary body and the driven rotary body. an intermediate rotating body located between and rotatably mounted on the rotating shaft; a drag applying mechanism that applies a rotational drag force to the intermediate rotating body; a biasing mechanism that biases the slider in a direction away from the driven rotary body; and a biasing mechanism that is provided between the slider and the drive rotary body to prevent positional displacement in the rotational direction of both. a cam mechanism that converts the slider into a forward motion in the direction of the drive rotor, and a cam mechanism that locks the forward motion when the slider moves forward to shift the position of the slider with respect to the drive rotor. 1. A handle drive device for a handle rack, comprising a clutch mechanism for inhibiting the movement of the slider and connecting the slider to the driven rotating body. 2. The handle rack according to claim 1, wherein the drag applying mechanism has a weight extending from the outer periphery of the intermediate rotating body in substantially the same direction as the extending direction of the handle. handle drive mechanism.