JPH0448045B2 - - 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 the rack bodies are set in relation to the rail length so that the required moving distance remains when the rack bodies are brought into close contact with each other. By selectively forming passages between the rack body and the rack body through which people can enter and exit, the rack body can be used as a storage space 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 including 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.

Furthermore, with such devices, if the handle that is not being operated is stopped at various positions, it is unsightly and has a negative effect on operability. It would be ideal to 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 a shaft and connected to the running wheel via a transmission element; a driving rotary body extending in the direction of the driving rotary body, and a driving rotary body positioned between the driving rotary body and the driven rotary body and mounted on the rotary shaft so as to be rotatable, and having a distal end thereof substantially the same as the driving rotary body. an intermediate rotating body extending in the direction; a balance member supported by the distal end of the intermediate rotating body and rotating so that a meshing part formed at the rotating end can move forward and backward in a substantially radial direction; a gear provided on the driven rotating body with a toothed portion facing the meshing portion; a rotation biasing mechanism that rotationally urges the balance member in a direction in which the meshing portion moves away from the toothed portion; and a cam mechanism provided between the driving rotating body and converting the displacement movement in the rotational direction between the two into rotational movement of the balance member so that the meshing part meshes with the toothed part. It is characterized by

[Function] With this configuration, when the handle is not operated, the balance member held on the intermediate rotating body by the biasing force of the rotation biasing mechanism is activated by the gear provided on the driven rotating body. spaced apart from the tooth profile of
The driven 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 that time, there is a gap between the driving rotary body that rotates together with this rotating shaft and the intermediate rotary body that tries to stay at the lowest position due to the gravity acting on the center of gravity which is deviated downward and the gravity acting on the balance member. Misalignment is about to occur. Then, by the action of the cam mechanism, the positional displacement movement is converted into a rotational movement of the balance member, and the balance member rotates in the direction of the gear of the driven rotor against the urging force of the rotational urging mechanism. . When the balance member rotates by a certain angle, the meshing part of the balance member meshes with the tooth profile of the gear, and the intermediate rotating body is connected to the driven rotary body via the balance member, and the rotation of the balance member is prevented. blocked. When the rotational movement of the balance member is blocked, further displacement of the position between the balance member and the drive rotary body becomes impossible due to the reaction. Therefore, when the driving rotor rotates due to the operation of the handle, the intermediate rotor and the balance member follow it with a certain angle of displacement, and the rotation of the balance member of the intermediate rotor is caused by the meshing. is transmitted to the driven rotating body through the part. Therefore, the rotational operating force applied to the handle is transmitted to the running wheels via the rotating shaft, the driving rotating body, the balance member of the intermediate rotating body, the gear of the driven rotating body, the driven rotating body, and the transmission element, and the rack body is moved. It becomes possible to do so.

When the operation is stopped and the handle is released from this state, a force tends to cause a positional shift between the driving rotary body and the intermediate rotary body, in other words, a force tends to cause the balance member to rotate in the direction of the gear. The power to do so disappears. Therefore, the engaging portion of the balance member is separated from the toothed portion of the gear by the biasing force of the rotation biasing mechanism, and the connection between the balance member 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. Although it is possible that the force may not disappear immediately due to the influence of gravity etc. acting on the handle, it is possible for the handle to rotate an appropriate amount due to the reverse driving force from the running wheels due to the inertia of the rack body, etc. In this case, there will always be an opportunity for the force to disappear and the slider 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, in this case, the handle, the drive rotor, and the intermediate rotor holding the balance member at the tip extend in substantially the same direction, although there is a slight positional shift as described above. Therefore, when the mesh between the balance member and the gear is released, the handle, the driving rotor, and the intermediate rotor self-return to the lowest position due to the gravity acting on the center of gravity that is deviated toward the extension side. Become.

[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. 6, the rack 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 the front surface thereof. 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.
An intermediate rotary body 11 is located between the sprocket 8 and the rotary shaft 7, and an engaging portion 10a rotatably supported at the tip of the intermediate rotary body 11 and formed at the rotary end is approximately A take-up member 10 that rotates so as to move forward and backward in the radial direction, a gear 12 provided on the sprocket 8 with a toothed portion 12a facing the meshing portion 10a of the take-up member 10, and the take-up member 1
0 in the direction in which the meshing portion 10a is separated from the toothed portion 12a, and a cam mechanism 14 provided between the balance member 10 and the driving rotary body 9. It will be done.

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 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 boss portion 9a fixed to the outer periphery of the boss portion 9a to the handle 3. It consists of a rod-shaped portion 9b extending in the same direction as the extending direction.

The intermediate rotating body 11 has a boss portion 11a that is rotatably mounted on the outer periphery of the rotating shaft 7.
and a rod-shaped portion 11 extending from the outer periphery of the boss portion 11a in the same direction as the direction in which the driving rotor 9 extends.
b.

The balance member 10 has an intermediate portion pivotally attached to the tip of the rod-shaped portion 11b of the intermediate rotating body 11 via a shaft 15, and has an engaging portion 10a forming one rotating end.
can move forward and backward in a substantially radial direction with respect to the rotating shaft 7. The meshing portion 10a has a cross-sectional shape that can mesh with the gear 12a.

The rotation biasing mechanism 13 is provided with, for example, a torsion spring 13a wound around a shaft 15, and the end of the spring 13a biases the balance member 10 to rotate in the counterclockwise direction in FIG. This is what I did.

The cam mechanism 14 is connected to the rod-shaped portion 9 of the drive rotary body 9.
A bifurcated portion 9c is integrally provided at the tip of b, branching approximately in the rotational direction, and the bifurcated portion 9c is provided with a cam surface 14a,
14b is expanded in the outer diameter direction to form a V-shape. Then, a cam follower 14c is pivotally attached to the rotating end of the balance member 10 opposite to the engaging portion 10a, and this cam follower 14c is attached to the cam surfaces 14a, 14.
It is engaged with the valley part of b.

Note that the balance member 10 has its meshing portion 10a.
The dimensions of each part are set so that the cam follower 14c does not come off the cam surfaces 14a, 14b even when the cam follower 14c is rotated to a position where it can be completely engaged with the toothed portion 12a.

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 torsion spring 13a, as shown in FIGS. 1 and 2. The meshing portion 10a of the balance member 10 is spaced apart from the gear 12 provided on the sprocket 8, so that the sprocket 8 can freely rotate with respect to the rotating shaft 7. Therefore, even if a pressing force is applied to the rack main body 4 from the left and right directions in FIG. 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, all the handles 3 that are not being operated are positioned at the lowest position due to gravity. .
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 balance member 10, which tend to remain at the lowest position due to gravity. Then, as shown in FIG.
Start climbing while rolling on a and 14b. As a result, the rotating end of the balance member 10 on the right side in the figure is pressed in the outer radial direction, and the balance member 10 rotates in the direction of arrow X against the biasing force of the torsion spring 13a. Then, when it is rotated by a certain angle, as shown in FIG. While being connected to the sprocket 8, further rotation is prevented. When the rotational movement of the balance member 10 is prevented in this way, the cam follower 14c is no longer moved to the cam surface 14.
a, 14b becomes impossible, and positional displacement between the intermediate rotary body 11 and the drive rotary body 9 cannot occur any more. Therefore, handle 3
When the driving rotor 9 rotates due to the operation, the balance member 10 follows it while being held by the intermediate rotor 11 and is shifted by a certain angle, and the rotation of the balance member 10 is caused by the rotation of the gear. 12 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 drive rotating body 9, the balance member 10 of the intermediate rotating body 11, the gear 12, the sprocket 8, and the chain 18. It becomes possible to move the main body 4 to the right or left. Note that once such a transmission system is formed, as long as the handlebar 3 is continued to be operated, the cam follower 14c is moved by the torque required to drive the running wheels 5 to the cam surface 14a,
14b. Therefore, due to the influence of gravity etc., the balance member 10 and the gear 12
The connection will never be broken.

When the operation is stopped and the handle 3 is released from this state, a force that tends to cause a positional shift between the drive rotary body 9 and the balance member 10 of the intermediate rotary body 11, in other words, the cam surface 14a, 14b dissipates the force that presses the cam follower 14c and attempts to rotate the balance member 10 in the direction of the gear 12. Therefore, the biasing force of the torsion spring 13a rotates the balance member 10 in a direction away from the gear 12, and the connection between the balance member 10 and the gear 12 due to the engagement between the meshing portion 10a and the toothed portion 12a is released.

However, in this device, the power is intermittent by the balance member 10, which has a small mass and is exclusively used for rotational motion with little resistance. The operation is easier than the one that performs intermittent and intermittent operation, and more reliable power intermittent action can be obtained.

When the connection between the balance member 10 and the gear 12 is released in this way, the gravity acting on the intermediate rotating member 11, the balance member 10, and the drive rotary body 9, and the gravity acting on the handle 3 cause the Handle 3
returns to its lowest position and returns to its original state.

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

As a modification of the cam mechanism, a cam surface may be provided on the balance member side in a V-shape, and a cam follower or the like may be provided on the driving rotary body side to engage with the cam surface.

Furthermore, the forms of the driven rotary body, the intermediate rotary body, and the 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, 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. 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 ensured by using the rotational movement of the balance member that can be operated easily. It is possible to provide a handle drive device for a handle rack, which can effectively eliminate the problem of the handle of a driven rack body rotating on its own axis and causing harm to people nearby.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which 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. - Enlarged sectional view along line B, Figure 4 is the second
FIG. 5 is an explanatory view of the operation corresponding to FIG. 3, and FIG. 6 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... Balance member, 10a... Meshing part, 11... Intermediate rotating body, 12... Gear, 12a
...Tooth profile portion, 13... Rotation biasing mechanism, 13a...
Torsion spring, 14... Cam mechanism, 15...
Clutch 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; a balance member which is supported by the distal end of the intermediate rotating body and rotates so that the engagement part formed at the rotating end can move forward and backward in a substantially radial direction; and a toothed part facing the engagement part of the balance member. a gear provided on the driven rotary body; a rotational biasing mechanism for rotationally biasing the balance member in a direction in which the meshing portion moves away from the toothed portion; and a rotational biasing mechanism provided between the balance member and the drive rotary body. A handle of a handle rack, characterized in that the handle is equipped with a cam mechanism that converts a displacement movement in the rotational direction between the two into a rotational movement of the balance member, thereby causing the meshing part to mesh with the toothed part. Drive device.