JPH10141464A - Rotary linear movement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device in which rotation and linear movement are required and which is compact and can reduce a cost. SOLUTION: This rotary linear movement device is provided with a spline shaft 11, a spline receiver 12, and a spur gear 13. The spur gear 13 is arranged by crossing the longitudinal direction of the spline shaft 11 at a right angle, a projection of the spline shaft 11 is provided with teeth which mesh with the spur gear 13 along the longitudinal direction thereof, and the teeth mesh with the spur gear 13. When the spur gear 13 rotates, the spline shaft 11 moves linearly by using the spline receiver 12 as a guide. When the spline receiver 12 rotates, the spline shaft 11 rotates together with the spline receiver 12. When the spur gear 13 and the spline receiver 12 rotate simultaneously, the spline shaft 11 moves linearly together with the spline receiver 12 by the spur gear 13 and rotates together with the spline receiver 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for performing rotation and linear movement.

[0002]

2. Description of the Related Art Conventionally, rotation and linear movement are performed by separate mechanisms. For example, in a conveyor device that conveys substrates of printed wiring boards having different widths, as shown in FIG. 5, the belt is rotated by a spline shaft and a motor, and the belt width is changed by a ball screw and a motor.

The base has a pair of side members A and B arranged in parallel, a bottom member C connecting them, and a movable member D arranged between the side members A and B. The belt mechanisms E and F have several belt wheels and endless belts wrapped around the wheels, and are incorporated in the side member A and the movable member D of the base, respectively. The spline shaft G is held at both ends by bearings on the side members A and B, and at the middle by a spline receiver held rotatably by the movable member D. One of the belt wheels of the belt mechanisms E and F is attached to a spline receiver provided on the side member A and the movable member D. Both ends of the ball screws H and I are held by bearings on side members A and B of the base, nuts J and K are connected to the movable member D, and ends protruding from the side member B are connected to the belt L. Belt wheels M, N
And are connected by

When the motor O rotates the spline shaft G, the belt wheels of the belt mechanisms E and F rotate, and the substrate mounted on the belt is transported. When the motor P rotates, the ball screw I rotates, the ball screw H rotates at the same time, the nuts J and K of these ball screws move, and the movable member D moves on the spline shaft G. Belt mechanism E
Is changed in accordance with the size of the substrate to be conveyed.

[0005]

In a conventional apparatus requiring rotation and linear movement, since rotation and linear movement are performed by different mechanisms, the type and number of parts are large. Therefore, not only is the cost required for preparing and assembling the parts large, but also the space requirement for the arrangement of the parts makes it difficult to reduce the size.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the size and cost of a device that requires rotation and linear movement.

[0007]

In order to achieve the above object, a rotary linear motion device according to the present invention comprises a spline shaft, a spline receiver for guiding the spline shaft, and a spur gear, wherein the spur gear has a spline shaft. The spline shaft is arranged orthogonal to the longitudinal direction, and the spline shaft is provided with teeth corresponding to the teeth of the spur gear along the longitudinal direction of the projection, and the teeth are meshed with the spur gear.

When the spur gear rotates, the spline shaft moves linearly using the spline receiver as a guide. When the spline receiver rotates, the spline shaft rotates together with the spline receiver. When the spur gear and the spline receiver rotate simultaneously, the spline shaft rotates. The shaft moves linearly with the spline receiver by means of a spur gear, and rotates together with the spline receiver.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary linear motion apparatus according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, the rotary linear motion device includes a spline shaft 11, a spline receiver 12, and a spur gear 1;
3 is provided.

The spline shaft 11 is, as shown in FIG.
The spline receiver 12 is spline-coupled to the spline receiver 12, and can perform linear movement in the longitudinal direction, and can rotate together with the spline receiver 12. Each of the protrusions 14 on the spline shaft 11 is provided with teeth 15 having a tooth shape corresponding to the teeth of the spur gear 13 along the longitudinal direction. The spline receiver 12 is held together with the spline shaft 11 by a bearing in a housing (not shown) so as to be rotatable about the longitudinal center axis of the spline shaft 11.

As shown in FIG. 3, the spur gear 13 is formed by meshing its teeth with the teeth 15 of the spline shaft 11.
The shaft is arranged orthogonal to the central axis in the longitudinal direction, and the shaft is held by a bearing in the housing.

In this rotary linear motion device, when the spur gear 13 rotates, the spline shaft 11 linearly moves in the longitudinal direction of the spline shaft 11 while being guided by the spline receiver 12, and when the spline receiver 12 rotates, the spline shaft 11 Rotates together with the spline receiver 12. At this time, the spline shaft 11 rotates while allowing the teeth 15 to pass between the teeth of the spur gear 13, so that the spur gear 13 does not rotate. The spur gear 13 and the spline receiver 12
Rotate simultaneously, the spline shaft 11 becomes a spur gear 13
As a result, the spline shaft 11 linearly moves in the longitudinal direction, and at the same time, rotates together with the spline receiver 12.

This rotary linear motion device combines rotation and linear motion, such as a conveyor device for transporting a substrate of a printed wiring board, a table device for lifting and lowering, and a low-precision work handling robot. By being incorporated into the required device, the type and number of drive components can be reduced. .

FIG. 4 shows an example of a conveyor device for transporting a substrate of a printed wiring board in which a rotary linear motion device according to the present invention is incorporated.

This conveyor device has a pair of side members 2 arranged in parallel, similar to a conventional substrate transfer conveyor device.
1 and 22, a base member 23 connecting these members, and a base including a movable member 24 disposed between the side members 21 and 22 are provided. A belt mechanism 25 is incorporated on a surface of the side member 21 facing the movable member 24, and a belt mechanism 26 is incorporated on a surface of the movable member 24 facing the side member 21.

The belt mechanisms 25 and 26 are for transporting the substrate of the printed wiring board. The belt mechanism 25 is a belt wheel rotatably held by the side member 21 and an endless belt wound around these belt wheels. The belt mechanism 26 includes a belt wheel rotatably held by the movable member 24 and an endless belt wound around these belt wheels.

The spline shaft 27 includes side members 21, 22.
And the movable member 24, and is held by a spline receiver rotatably held by the members 21, 22, 24. The motor 28 is installed on the side member 21, and the side member 2 on the spline shaft 27 is
It is connected to the end extending from 1 to the outside. One of the belt wheels of the belt mechanisms 25 and 26 is attached to a spline receiver on the side member 21 and a spline receiver on the movable member 24.

Another spline shaft 11 forms a part of the rotary linear motion device according to the present invention, and is disposed across the side members 21 and 22 and the movable member 24, and is movable near the middle. Member 29 in member 24
Is joined to. The spline receiver 12 is a side member 2
1 and 22 are attached. The spur gear 13 is housed inside the housing 30, and the end of the gear shaft extending outside the housing 27 is connected to the shaft of the motor 31.

In this conveyor device, the substrate of the printed wiring board is mounted on the belt mechanisms 25, 26 with both ends in contact with the belts of the belt mechanisms 25, 26. Motor 28
, The spline shaft 27 rotates together with the spline receiver, the belt wheels of the belt mechanisms 25 and 26 rotate, and the substrate is transported by the belt.

The transfer of substrates having different widths is performed by the motor 31.
Is operated to adjust the belt interval of the belt mechanisms 25 and 26 to the width of the substrate. When the motor 31 operates, the spur gear 13 in the housing 30 rotates, the spline shaft 11 moves linearly, and the member 29 moves on the spline shaft 11 together with the spline receiver of the spline shaft 27 and the side member 24. The belt mechanism 26 moves in a direction approaching the belt mechanism 25 or in a direction away from the belt mechanism 25 according to the rotation direction of the motor 31. When the belt interval between the belt mechanisms 25 and 26 reaches a value corresponding to the width of the substrate to be conveyed, the operation of the motor 31 is stopped and the substrate is mounted on the belts of the belt mechanisms 25 and 26 with both ends in contact with each other. By operating the motor 28, the belt mechanism 2
5 and 26 carry the substrate.

[0022]

As described above, the rotary linear motion apparatus according to the present invention can perform rotation and linear movement by one unit, so that a substrate of a printed wiring board requiring these motions can be used. Devices such as conveyor devices for transport can be manufactured compactly and at low cost.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing an embodiment of a rotary linear motion apparatus according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a perspective view showing an example of a conveyor device for transporting a substrate of a printed wiring board in which the rotary linear motion device of the present invention is incorporated.

FIG. 5 is a perspective view showing an example of a conventional conveyor device for transporting a substrate of a printed wiring board.

[Explanation of symbols]

 11 ... spline shaft 12 ... spline receiver 13 ... spur gear 15 ... spline shaft teeth

Claims (1)

[Claims] 1. A spline shaft, a spline receiver for guiding the spline shaft, and a spur gear, wherein the spur gear is disposed orthogonal to the longitudinal direction of the spline shaft, and the spline shaft extends along the longitudinal direction of the projection. A rotary linear motion device comprising: teeth corresponding to teeth of a spur gear; and teeth meshed with the spur gear.