JPS6320509Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly device for smoothly fitting a shaft-like article into a holed article while supporting the center of the article.

Generally, when fitting a shaft-shaped article to an article with a hole,
If the axes of the two are even slightly misaligned, they may become twisted during fitting, making it impossible to fit them smoothly.

For this reason, in the past, as shown in Japanese Patent Publication No. 52-16919, for example, a shaft-shaped article is fixed in a center-supported state, and a holed article is fitted onto this to smoothly assemble the two. ing.

However, although the above-mentioned conventional device is effective when it is possible to lift an article with holes, it is difficult to lift articles with holes because, for example, the article with holes has a complicated shape or is large and heavy. Even if there was a demand for fixing the shaft and fitting an article with a shaft thereto, it was not possible to meet this demand.

Moreover, in the above-mentioned conventional device in which the article with a hole is fitted from above the article with a shaft, the article with the hole must be held with the gripping claws until the article with the hole is temporarily press-fitted. This method requires operations such as stopping the head midway and releasing the gripping claws, takes time to assemble, and requires the press-fitting head to make complicated movements, resulting in a complicated configuration.

The present invention was developed to solve these conventional problems, and its purpose is to perform assembly work by moving shaft-shaped articles, and to assemble large and heavy articles with holes. The goal is to eliminate the need for operations.

Another object of the present invention is to perform the assembly work by continuously lowering a shaft-like article supported in the center above the article with holes, to perform the assembly work in a short time, and to configure the device. The goal is to make it easier.

Embodiments of the present invention will be described below based on the drawings. In the figure, 10 is a bed, 11 is a column fixed on this bed 10, and 13 is an article W with a hole by first and second receivers 14 and 15 provided on the upper surface thereof.
1 and a shaft-shaped article W2 to be fitted into a fitting hole H of a holed article W, respectively, are supported with their axes directed in the vertical direction. This pallet 13 is transferred onto the bed 10 by a conveyor device 16 and further positioned by a positioning device 17. This positioning device 1
7 is composed of a knock pin 18 and a cylinder device 19 that moves the knock pin 18 up and down.By engaging the knock pin 18 with the notch hole 13a of the pallet 13, the pallet 1
3 positioning is performed.

By positioning the pallet 13, the axis of the article with holes W1 is aligned with the assembly axis L, which is parallel to the vertical line.
and set in a position where it can be assembled.

A transfer arm 20 of a transfer device is provided diagonally in front of the pallet 13. This transfer arm 20 is used to transfer the shaft-shaped article W2 on the pallet 13, and is provided with a clamp claw 21 at its tip, and its rear end is connected to an unillustrated transfer device main body, and is connected to arrows X, Y, Movement in the three-dimensional direction indicated by Z is possible.

A chuck device 22 is also fixed to the column 11. The main body 23 of this chuck device 22
A plurality of gripping claws 24 are fixed to the shaft-like article W2 so as to hold the shaft-shaped article W2 substantially in alignment with the assembly axis L. This gripping claw 24 is composed of a plate spring, and allows the shaft-shaped article W2 to float.

Further, the column 11 is provided with a pressing drive device 25. This pressing drive device 25 is composed of a drive motor 26, a screw shaft 27 rotated by the drive motor 26, and a nut 28 screwed onto the screw shaft 27. A center 30 is connected.
This pressing center 30 centrally supports the upper end of the shaft-shaped article W1, and is supported on the column 11 so as to be movable up and down on the assembly axis L.

On the other hand, the bed 10 is provided with an elevating drive device 35. This lifting drive device 35 has a cylinder 36
and the piston 3 fitted inside this cylinder 36.
7, and an engagement center 38 is integrally formed on the piston rod of this piston 37. This engagement center 38 centrally supports the lower end of the shaft-shaped article W2, and is supported so as to be movable up and down on the assembly axis L with respect to the bed 10.

The movement stroke of the lifting drive device 35 is set to a length necessary to penetrate the through hole 13b of the pallet 13 and the fitting hole H of the holed article W1, and further engage the lower end of the shaft-shaped article W2. By raising the engagement center 38 prior to the assembly work, it is possible to support the shaft-shaped article W2 at both centers. Further, the pressing force of this lifting drive device 35 is set smaller than the pressing force of the pressing driving device 25, so that the engagement center 38 can be pushed down by the pressing center 30.

To explain the operation of the device of the present invention with the above configuration, the drawing shows the pallet 1 being conveyed by the conveyor device 16.
3 is conveyed onto the bed 10, and the pallet 13 is further positioned by the dowel pins 18, and as a result of this positioning, the axis of the holed article W1 on the pallet 13 coincides with the assembly axis L. is set to . As a result, the transfer arm 20
The shaft-shaped article W2 on the pallet 13 is gripped by the shaft-like article W2, and the transfer arm 20 is moved along a required movement path and inserted into the chuck device 22. By this insertion operation, the upper end of the shaft-shaped article W2 is centrally supported by the pressing center 30 and is gripped by the gripping claws 24 so as to be able to float.

After that, pressure oil is supplied into the cylinder 36 and the piston 37 moves upward. As a result, the engagement center 38, which is integral with the piston 37, passes through the fitting hole H of the holed article W1, is raised, and engages with the lower end of the shaft-shaped article W2 gripped by the chuck device 22. By this engagement of the engagement center 38, the shaft-shaped article W2 is aligned with the assembly axis L, that is, the axis of the fitting hole H of the holed article W1 with high precision.

When the screw shaft 27 is rotated by the drive motor 26 while the engagement center 38 is engaged with the shaft-shaped article W2, the pressing center 30 is lowered by the screw action, and the shaft-shaped article W2 gradually becomes an article with a hole. It is fitted into the fitting hole H of W1. At this time, since the shaft-shaped article W2 is lowered while being supported by both centers 30 and 38, there is no misalignment with the fitting hole H of the holed article W1.
It can be inserted smoothly.

When the press center is lowered to a predetermined position and the assembly is completed, the engagement center 38 remains at the lower end, and the press center 30 is raised to the upper end by the press drive device 25, and the same operation as described above is performed again. Then, the pallet 13 is carried in and carried out, and the next article to be assembled is assembled.

As mentioned above, the device of the present invention fixes the article with holes, and lowers the shaft-shaped article that is centrally supported from above the article with holes to assemble the two articles. It is possible to handle cases where the shaft is large and heavy, and the shaft-shaped article can be lowered continuously, so the assembly time can be shortened and the configuration of the device can be simplified. I can do it.

In addition, in the present invention, press-fitting is performed by pivoting the center while supporting both ends of the shaft-shaped article supported by the chuck device at the center, so that the posture of the shaft-shaped article is not tilted during press-fitting. It has the advantage of being able to continuously and efficiently press-fit articles with holes in a highly accurately centered state.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the assembly device of the present invention, and FIG. 2 is a cross-sectional view taken along the - line in FIG. 1. W1...article with hole, W2...shaft-shaped article, H...
Fitting hole, 13...pallet, 22...chuck device, 25...pressing drive device, 30...pressing center, 35...lifting drive device, 38...engaging center.

Claims (1)

[Scope of utility model registration request] A pallet for positioning and supporting an article with holes so that the axis of the fitting hole coincides with an assembly axis parallel to the vertical direction, and a shaft that is fitted into the fitting hole of the article with holes above the pallet. a chuck device that clamps and holds a shaft-shaped article with its axis substantially coinciding with the assembly axis; a pressing center on the assembly axis that engages with an upper end of the shaft-shaped article held by the chuck device; An engagement center on the assembly axis that engages with the lower end of the shaft-like article held by the chuck device, and a downward retraction of the pallet by pressing the engagement center with a pressing force smaller than the pressing force of the pressing center. a lifting drive device for moving the pressing center to an engaging position where the shaft-shaped article is engaged with the lower end of the shaft-shaped article through the through hole of the pallet and the fitting hole of the holed article; An assembling device characterized by comprising a pressing drive device that moves forward against force.