JPH0448046B2 - - 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 not uncommon for the robot to follow the action by pressing the 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, 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 located between the body and the rotary shaft so as to be rotatable and movable in the axial direction; an urging mechanism for urging the intermediate rotating body in a direction away from the driven rotating body; a drag applying mechanism that applies a rotational drag force to a rotating body; and a drag applying mechanism provided between the intermediate rotating body and the driving rotating body to shift the position of the rotating bodies in the rotational direction of the intermediate rotating body toward the driving rotating body. a cam mechanism that converts the intermediate rotary body into a forward motion; It is characterized by comprising a clutch mechanism connected to a rotating body.

[Operation] With this configuration, when the handle is not operated, the intermediate rotating body is separated from the driven rotating body by the biasing force of the biasing mechanism, and the driven rotating body is moved away from the rotating shaft. It is now free to idle.
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 intermediate rotary body, and the intermediate rotary body moves forward in the direction of the driven rotary body against the biasing force of the biasing mechanism. When the motor moves forward by a certain distance, the clutch mechanism becomes connected, and the intermediate rotating body is connected to the driven rotating body, and its forward movement is blocked.
When the forward motion of the intermediate rotary body is blocked, further displacement of the intermediate rotary body and the drive rotary body becomes impossible due to the reaction. Therefore, when the drive rotor rotates due to the operation of the handle, the intermediate rotor follows it with a certain angle of displacement, and the rotation of the intermediate rotor is transferred to the driven rotor through the clutch mechanism. can be conveyed to. Therefore, the rotational operating force applied to the handle is transmitted to the traveling wheels via the rotating shaft, the driving rotating body, the intermediate rotating body, the driven rotating body, and the transmission element, making it possible to move the rack body.

When the operation is stopped and the handle is released from this state, a force that tries to cause a positional shift between the driving rotary body and the intermediate rotary body, in other words, a force that tries to move the intermediate rotary body forward. disappear. Therefore, the intermediate rotating body is moved backward by the biasing force of the biasing mechanism, and the connection between the intermediate rotating body 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 will not be transmitted to the handle.

Furthermore, when the handle is released and the connection between the intermediate rotating body and the driven rotating body is severed, whether the handle will return to a certain position by itself due to its own weight, etc.
It varies depending 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 intermediate rotary body,
It becomes possible to move the intermediate rotating body forward. Then, from the time when this intermediate rotating body is connected to the driven rotating body and cannot move forward, the intermediate rotating body having the weight will follow the driving rotating 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 in the stage where the handle is rotated in this way, the force that advances the intermediate rotating body is deenergized as described above, and the connection between the intermediate rotating body and the driven rotating body is released. . It is possible that the force does 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 inertia of the rack body, etc. There will always be an opportunity for the force to disappear and for the intermediate rotation to be released from the driven rotor. 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, an intermediate rotating body 11 is mounted on the rotating shaft 7, a biasing mechanism 12 that urges the intermediate rotating body 11 in a direction away from the sprocket 8, and A drag applying mechanism 13 that applies rotational drag to the body 11, a cam mechanism 14 provided between the intermediate rotating body 11 and the drive rotating body 9, and a cam mechanism 14 provided between the intermediate rotating body 11 and the sprocket 8. A clutch mechanism 15 is provided.

The rotating shaft 7 is supported horizontally within the rack body 4 via a bearing 16, and one end 7 thereof
a penetrates the operation surface panel 4b and projects 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 5 via.

The drive rotary body 9 is fixed to the rotating shaft 7 so as to face the sprocket 8, and includes a boss portion 9a fixed to the outer periphery of the rotating shaft 7, and a 180 mm diameter portion on the outer periphery of the boss portion 9a.゜A pair of rod-like parts 9 protruding in the radial direction from positions with different phases
It consists of b.

The intermediate rotating body 11 is disc-shaped and is mounted around the outer periphery of the rotating shaft 7 so that it can idle and move in the axial direction.

The biasing mechanism 12 includes a compression coil spring 12a.
is wound around the outer periphery of the rotating shaft 7 and interposed between the intermediate rotating body 11 and the sprocket 8.

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 driving rotor 9, at portions with a phase difference of 180°, for example, on the outer peripheral edge of the end surface of the intermediate rotor 11, and The tip of the rod-shaped portion 9b of the driving rotary body 9 is connected to the intermediate rotary body 11.
It has a V-shaped engagement surface 14c, 14d which is bent in the direction and is slidably engaged with the cam surfaces 14a, 14b at its tip.

The clutch mechanism 15 includes one toothed portion 15a formed in an annular shape on the end surface of the sprocket 8, and the other toothed portion 15 protruded at a portion of the end surface of the intermediate rotating body 11 that is out of phase by, for example, 180°.
When the intermediate rotating body 11 moves forward in the direction of the sprocket 8, the toothed portions 15a and 15b mesh with each other.

Note that the sum (β+α) 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, the intermediate rotating body 11 is separated from the sprocket 8 by the elastic biasing force of the compression coil spring 12a, as shown in FIGS. 1 and 2. The sprockets 8 are separated from each other, 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. 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, also rotates.

Furthermore, in this embodiment, the weight 13a protruding in the same direction as the handle 3 is used to apply the necessary rotational force to the intermediate rotating body 11 during operation, so that 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 engaging surfaces 14c and 14d provided at the tips of the driving rotary body 9 begin to climb while sliding on the cam surfaces 14a and 14b of the intermediate rotary body 11.
As a result, the intermediate rotating body 11 is pressed in the forward direction X, and the intermediate rotating body 11 moves forward in the direction of the sprocket 8 against the biasing force of the compression coil spring 12a. And a certain distance (α+β)
When the intermediate rotary body 11 moves forward by a certain amount, as shown in FIG.
The intermediate rotating body 11 is completely engaged with the toothed portion 15a of the sprocket 8, and the intermediate rotating body 11 is connected to the sprocket 8, and further advancement thereof is prevented. Incidentally, since the axial dimension γ of the cam surfaces 14a and 14b is set larger than the advancing distance (α+β) of the intermediate rotating body 11, at this stage, the engaging surface 1
4c and 14d do not come off the cam surfaces 14a and 14b. In this way, the intermediate rotating body 11
When the forward movement of the engaging surfaces 14c,
14d is no longer able to climb the cam surfaces 14a, 14b, and the positional displacement movement between the intermediate rotating body 11 and the driving rotating body 9 can no longer occur. Therefore, when the drive rotary body 9 rotates due to an operation on the handle 3, the intermediate rotary body 11
The intermediate rotating body 11 follows this position with a certain angle of displacement, and the rotation of the intermediate rotating body 11 is transmitted to the sprocket 8 via the clutch mechanism 15. Therefore, the rotational operating force applied to the handle 3 is transmitted to the running wheels 5 via the rotating shaft 7, drive rotating body 9, intermediate rotating body 11, sprocket 8, and chain 18, causing the rack body 4 to move in the right or left direction. It is possible to move it to. 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 running wheels 5 will cause the engaging surfaces 14c and 14d to engage with the cam. Surfaces 14a, 14
It will be strongly pressed against b. Therefore, due to the gravity acting on the weight 13a, the intermediate rotating body 1
The connection between sprocket 1 and sprocket 8 is never released.

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 driving rotary body 9 and the intermediate rotary body 11, in other words, the engagement surfaces 14c and 14d exert a force on the cam. surface 14a,
The force that presses 14b and moves the intermediate rotating body 11 forward is deenergized. Therefore, due to the biasing force of the compression coil spring 12a, the intermediate rotating body 11
is moved backward, and the connection between the intermediate rotating body 11 and the sprocket 8 due to the meshing of the toothed portions 15a and 15b is released.

When the connection between the intermediate rotating body 11 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 does not apply to a device that uses a weight as in the above embodiment. This provides the effect that the handle can reliably return to its home position by itself, no matter where the handle operation is stopped.

Further, as a modification of the cam mechanism, a cam surface may be provided in a V-shape on the driving rotor side, and an engagement surface that engages with the cam surface may be formed on the intermediate 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 function that does not transmit power to the handle without requiring a special clutch switching operation and using only a small number of mechanical elements that can be easily operated. It is possible to provide a handle drive device for a handle rack that can eliminate the problem that the handle rotates on its own axis and harms people nearby.

[Brief explanation of drawings]

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, 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 mounted on the rotating shaft so as to be able to idle and move in the axial direction; a biasing mechanism that urges this intermediate rotating body in a direction away from the driven rotating body; and this intermediate rotating body. a drag applying mechanism that applies a rotational drag to the intermediate rotating body and the driving rotating body; and a drag applying mechanism that is provided between the intermediate rotating body and the driving rotating body to control the displacement movement of both rotating bodies in the rotational direction of the intermediate rotating body and moving the intermediate rotating body forward in the direction of the driving rotating body. a cam mechanism that locks the forward movement of the intermediate rotary body when the intermediate rotary body moves forward to prohibit misalignment of the intermediate rotary body with respect to the drive rotary body; A handle drive device for a handle rack, comprising a clutch mechanism connected to the handle rack. 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.