JPS6222738B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an apparatus for inserting a dummy shaft into a workpiece in which a predetermined number of needles are aligned along the inner circumferential surface and inspecting the inserted state during the assembly process of a needle bearing. It is related to.

In the past, needle bearings were assembled manually or by some automated equipment, but needle bearings are important parts of machine construction, and needles, etc. Since the component parts are small and the number of each component is large, it is necessary to inspect whether the component parts have been properly assembled during the assembly process.

The assembly order for this needle bearing is as follows:
The needles are aligned and assembled along the inner peripheral surface of the outer ring that constitutes the bearing, and then a dummy shaft is inserted and transported. The dummy shaft is
This is a temporary shaft until the original main shaft of the needle bearing is attached, and after the above-mentioned transportation, it becomes an important shaft that guides the aligned needles to the center and prevents the needles from collapsing.

Therefore, in order to inspect the insertion status of the above-mentioned dummy shaft, it is necessary to set up a separate inspection department after the insertion process, install new inspection equipment, or perform manual confirmation. It had some problems.

This invention was made by focusing on the above-mentioned problems, and enables efficient and reliable insertion and inspection of the dummy shaft in the same place, making it possible to support fully automatic assembly. The purpose of the present invention is to provide a needle bearing assembly and inspection device.

The needle bearing assembly and inspection device according to the present invention has a structure including a dummy shaft supply device that supplies a dummy shaft into a workpiece in which a predetermined number of needles are arranged along the inner circumferential surface side, and a dummy shaft supply device that is provided to be movable up and down and that is equipped with a spring. a test pin holder for vertically slidably holding a test pin biased downward by the test pin; and a detection means for detecting that the test pin has slid upwardly with respect to the test pin holder. The present invention is characterized in that, when the inspection pin holder is lowered, the lower end of the inspection pin is disposed so as to be able to come into contact with the upper surface of the dummy shaft inserted into the workpiece.

The present invention will be explained below based on the drawings.

1 to 4 are diagrams showing an embodiment of the present invention.

That is, this needle bearing assembly/inspection device 1 is installed at a distance from the upper surface of a track 3 that conveys a workpiece 2, which is the outer ring of the bearing, and is provided with a base 4 that is approximately parallel to the track 3. , test pins 13 are placed on the top surface of this board 4.
A bracket 6 is attached to support the.

The bracket 6 has an overhanging upper surface 6a, and a cylinder 8 having a cylinder rod 7 facing downward is provided on the upper surface 6a. Furthermore, an inspection pin holder 10 is provided on the side surface of the bracket 6 to which a guide block 9 is fixed and which is slidable in the vertical direction by the guide block 9. Then, the intermediate rod 11 is fixed to the upper surface side of the test pin holder 10, and the intermediate rod 11
and the cylinder rod 7 of the cylinder 8 are connected by a joint 12.

Further, the test pin 13 is provided to pass through the test pin holder 10 in the vertical direction.

The test pin 13 is slidable with respect to the test pin holder 10, and the test pin 13 is attached to the upper end side of the test pin holder 10.
A dog 14 with a larger diameter is provided, a collar 15 is fixed at a position spaced apart from the lower surface of the test pin holder 10, and a spring 16 is installed between the collar 15 and the lower surface of the test pin holder 10.
is embedded. Therefore, the inspection pin 1
3 is urged downward by a spring 16 and is prevented from falling off by a dog 14.

A guide bush 17 is provided below the inspection pin 13 on the base 4,
The guide bush 17 includes an inspection pin holder 1.
A supply hole 18 is formed so that the lower end of the test pin 13 can be inserted therethrough as the test pin 13 descends.

This supply hole 18 is provided as a supply path for the dummy shaft 20.
It has a diameter that allows insertion of 0.

Furthermore, a supply device 21 for the dummy shaft 20 is installed on the upper surface of the base 4, and the dummy shaft supply device 21 supplies the dummy shaft 20 as shown in FIGS. 2 and 3. Slide block 2 leading above the supply hole 18
2, and a base block 2 provided as an auxiliary part of the slide block 22 to guide the dummy shaft 20 guided by the slide block 22.
3, and a guide member 2 fixed on the base 4 and slidably holding the slide block 22.
4, and a shoot block 25 that sequentially supplies the dummy shafts 20 to the dummy shaft supply device 21. Furthermore, the slide block 22 and the escape cylinder 26, which extends and contracts by a drive mechanism (not shown), are swingable. Arm 2
It has a configuration in which 7 are connected.

The swing arm 27 has a fan-shaped shape when viewed from above, and is provided with a pivot pin 28 at the end corresponding to the central corner, and is rotated relative to the base 4 by the pivot pin 28. It is freely attached, and one end side of the circular arc portion is attached to the slide block 22.
The escape cylinder 26 is formed into a curved part that can be engaged with a pin 29 fixed to the escape cylinder 26, and the other end of the arc part is pivotally connected to a joint provided at the tip of the escape cylinder 26.

On the other hand, the test pin 13 is connected to the test pin holder 10.
As shown in FIG. 5, a limit switch 31 is provided as a detection means for detecting that the slider has slid upward against the slider. This limit switch 31
is a movable contact piece 3 with a roller 32 attached to its tip.
3, and the roller 32 is fixed to the inspection pin holder 10 in a state in which it is in pressure contact with the upper end side of the dog 14 having a smaller diameter.

Next, the operation of the assembly inspection apparatus 1 configured as above will be explained.

First, the workpiece 2, on which a predetermined number of needles 2a have been assembled, is conveyed on the upper surface of the track 3 and stops at a predetermined position below the guide bush 17 (the state shown in FIG. 1). Next, as shown in FIG. 4, when the escape cylinder 26 of the dummy shaft supply device 21 is operated in the extending direction (direction of arrow A in the figure) by a drive mechanism (not shown), the swing arm 27 moves the pivot pin 28. The slide block 22 is rotated around the center via the pin 29 in the pushing direction (arrow B direction in the figure), and the slide block 22 moves the dummy shaft 20 above the supply hole 18 (see FIG. 3). It slides in the extrusion direction (direction of arrow C in the figure).

Then, the dummy shaft 20 is guided above the supply hole 18 by the slide block 22.
falls inside the supply hole 18 due to its own weight, and is smoothly inserted into the center of the workpiece 2 under normal circumstances.

At this time, the lower end of the shoot block 25 that sequentially supplies the dummy shafts 20 is in a state of being closed by the upper surface of the slid slide block 22, and the slide block 22 is returned to its original position by the contraction of the escape cylinder 26. When the dummy shaft 20 is returned to the position shown in FIG.
0 is loaded into the slide block 22.

Next, when the dummy shaft 20 is inserted into the workpiece 2, the cylinder rod 7 is extended with the operation of the cylinder 8, and the inspection pin holder 10 is lowered. At this time, the test pin holder 10 is lowered to a position where the lower ends of the test pins 13, which are lowered together, are close to the upper surface of the dummy shaft 20 inserted in the normal state, and the dummy shaft 20 is moved to the left side in FIG. As shown in workpiece 2, if the insertion state is normal, the test pin 13 will not slide against the test pin holder 10, and the limit switch 31 will not operate. Therefore, the fact that the limit switch 31 does not operate indicates that the dummy shaft 20 is inserted in a normal state.

In addition, as shown in the workpiece 2 on the right side of FIG. The lower end of the inspection pin 13 that has descended together with the body 10 comes into contact with the dummy shaft 20 that protrudes upward from the workpiece 2, and the descent of the inspection pin 13 is prevented.
The test pin 13 slides upward with respect to the test pin holder 10 while compressing the spring 16 between the collar 15 and the test pin holder 10.

Then, due to the sliding of the inspection pin 13, the roller 32 which was in pressure contact with the small diameter portion of the dog 14 is pushed away by the large diameter portion of the dog 14, so that the movable contact piece 33 is simultaneously pushed. The limit switch 31 is operated to detect that the test pin 13 has slid relative to the test pin holder 10.

That is, when the limit switch 31 detects that the inspection pin 13 has slid, it indicates that the dummy shaft 20 is not inserted into the workpiece 2 in a normal state.

Furthermore, after completing the inspection, cylinder 8
When the cylinder rod contracts and the test pin holder 10 rises, the test pin 13 returns to its original position due to the repulsive force of the compressed spring 16, and at the same time, the limit switch 31 also returns.

In addition, in the above embodiment, an example was shown in which the limit switch 31 configured to push the movable contact piece 33 with the sliding test pin 13 was provided as a detection means for detecting the sliding of the test pin 13. As other detection means, for example, a magnet provided on the test pin holder 10 side and a movable piece made of a magnetic material provided on the test pin 13 side are configured so that they can come into contact when the test pin 13 slides. It may be a reed switch, a photoelectric switch, a Hall element, etc., and by inputting the output from this detection means to a sorting mechanism, it is possible to automatically separate good products from defective products. Become.

Further, as described in the above embodiment, the inspection pin 13 is provided to be inserted into the supply hole 18 of the dummy shaft 20 so that the insertion and inspection of the dummy shaft 20 are performed at the same place.
Even if the dummy shaft 20 cannot be fully inserted due to its own weight due to oil adhering to the interior of the dummy shaft 8 or the needle 2a, it is easily possible to completely insert the dummy shaft 20 by the descending inspection pin 13.

Furthermore, when the workpiece 2 is transported to a predetermined position with respect to the needle bearing assembly/inspection apparatus 1 described in the above embodiment, the needle 2a is simply assembled along the inner peripheral surface of the outer ring. can be,
There is a space in the center where the dummy shaft 20 is inserted, but if the cylindrical needles 2a are aligned vertically along the circular inner circumferential surface, the predetermined number of needles must be assembled without any gaps. It will not fall inward, and as long as it moves horizontally on the top surface of the truck 3, there will be no problem.

Therefore, if even one needle 2a is missing, the remaining needles 2a will fall inward, making it easy to detect the lack of needles and also ensuring that the dummy shaft 20 is inserted correctly in the needle bearing assembly and inspection device 1. If this is not done, the abnormality can be detected.

As described above, the needle bearing assembly inspection device of the present invention includes a dummy shaft supplying device that supplies a dummy shaft into a workpiece in which a predetermined number of needles are aligned along the inner circumferential surface, and a vertically moving a test pin holder which is provided so that the test pin is slidably vertically supported and which is biased downwardly by a spring; and the test pin is slidable upwardly with respect to the test pin holder. The lower end of the test pin is arranged so as to be able to come into contact with the upper surface of the dummy shaft in the workpiece when the test pin holder is lowered, so that the lower end of the test pin is arranged so that it can come into contact with the upper surface of the dummy shaft in the workpiece. Insertion of a dummy shaft into a workpiece with a predetermined number of needles lined up and an inspection to determine the quality of the insertion can be performed in the same place, and the needle bearing assembly can be fully automated. It has the effect of making it possible.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view illustrating a needle assembly/inspection device according to an embodiment of the present invention, FIGS. 2 and 3 are sectional views and perspective views illustrating the structure of a dummy shaft supply device, and FIG. 4 is a dummy shaft supply device. A fifth perspective view illustrating the state in which the shaft feeding device operates.
The figure is a front sectional view illustrating a case where the dummy shaft is inserted normally and a case where the dummy shaft is not inserted normally using the same device. 1...Needle bearing assembly inspection device, 2...
...Work, 2a... Needle, 10... Test pin holder, 13... Test pin, 16... Spring, 20... Dummy shaft, 21... Dummy shaft supply device, 31... Limit switch (detection means).

Claims (1)

[Claims] 1 A device for inserting a dummy shaft into a workpiece in which a predetermined number of needles are aligned along the inner peripheral surface side and inspecting the inserted state of the dummy shaft, the dummy supplying the dummy shaft into the workpiece. a shaft supply device, an inspection pin holder that is provided to be movable up and down and that slidably holds an inspection pin urged downward by a spring in the up and down direction; and detecting means for detecting that the test pin has slid upward, and is arranged so that the lower end of the test pin can come into contact with the upper surface of the dummy shaft inserted into the workpiece when the test pin holder is lowered. A needle bearing assembly inspection device characterized by: