JPS6222739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inspection device used to simultaneously inspect the assembled state of needles after assembly during the assembly process of needle bearings.

In the past, the assembly of needle bearings was done by some automated equipment or by hand, but since bearing parts such as needle bearings are important parts in constructing machines, During the assembly process, it is very important to inspect whether each component has been assembled correctly.

In addition, the needle bearing that is carried out after assembly consists of a large number of needles aligned along the inner peripheral surface of the outer ring, a dummy shaft that serves as a temporary shaft until it is attached to the original shaft, and that serves as a center guide for the needles. However, as mentioned above, when inspecting during the assembly process, manually inspecting the detailed assembly condition of the needle is a difficult task, so careful inspection is carried out one by one. Since doing so leads to inefficiency, reliable and efficient automated inspection has been desired.

This invention was made by focusing on the conventional problems as described above, and it is a needle bearing that can simultaneously and reliably inspect the needle assembly state and is compatible with full automation. The purpose is to provide assembly inspection equipment.

The configuration of the needle bearing assembly inspection device according to the present invention is such that a needle inspection pin, which is biased downwardly by a spring, is provided in a vertically movable inspection pin holder so as to be slidable in the vertical direction. When the needle test pin is lowered, the lower end of the needle test pin is arranged so as to be able to be pressed against the upper surface of the needle of the needle bearing, and the test pin is slid upwardly on the test pin holder by the pressure contact. The present invention is characterized in that it is provided with a detection means for detecting.

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

FIG. 1 to FIG. 6 are diagrams explaining one embodiment of the present invention.

That is, this needle bearing assembly/inspection device 1 is installed at a distance above a track 3 for transporting a needle bearing 2, and a bracket 5 is placed on the top surface of a base 4 provided in a plane parallel to the top surface of the track 3. A guide block 6 is fixed to the vertical surface of the bracket 5, and an inspection pin holder 7 is held by the guide block 6 in a vertically slidable manner.

Furthermore, the bracket 5 has a horizontal portion 5a projecting above the inspection pin holder 7, and the horizontal portion 5a is equipped with a cylinder shaft 8 directed downward that reciprocates up and down. A cylinder 9 is attached. Then, the test pin holder 7
A shaft 10 is fixed on the upper surface of the shaft 1.
The upper end of the cylinder shaft 8 and the lower end of the cylinder shaft 8 are connected by a joint member 11.

As shown in FIG. 2, the test pin holder 7 has two test pin insertion holes 12, 1.
3 are formed vertically, and each of the insertion holes 12, 13
After inserting the needle test pin 14 and the dummy shaft test pin 15 from above in a slidable state, and inserting the coil springs 16 and 17 above the test pins 14 and 15, respectively, the test pin holder is inserted into the test pin holder. A plate 18 is attached to the upper surface of 7.

Further, each of the test pins 14 and 15 has an upper end side and a lower end side that pass through the plate 18 and the lower surface side of the test pin holder 7, respectively, and protrudes upward and downward, and each has a large diameter portion in the center. 14
a, 15a, and the fitting holes 12, 13
The test pins 14 and 15 are configured so that they do not fall down from the lower end side.

Each of the inspection pins 14 and 15 has coil springs 16 and 17 interposed between the large diameter portions 14a and 15a and the lower surface of the plate 18, respectively.
It is always urged downward by.

Note that when the test pin holder 7 is lowered, the needle test pin 14 and the dummy shaft test pin 15 are pressed into contact with the needle 20 and the dummy shaft 21 of the needle bearing 2 whose lower ends are temporarily stopped at the bottom of the device. The pins 14 and 15 are arranged in a position where it is possible to inspect the two needle bearings 2 at the same time, as shown in FIG.
Two sets of test pins 14 and 15 are provided symmetrically from the center of the test pin holder 7.

The inspection pin 1 is mounted on the side surface of the inspection pin holder 7.
Phototubes 23 and 24 supported by a support member 22 fixed to the side surface are provided as detection means for detecting that 4 and 15 have slid upward.
These phototubes 23 and 24 are equipped with both a light emitting element and a light receiving element, and the end portion 23, which emits light and receives light,
a, 24a indicate the needle inspection pin 14 and the dummy shaft inspection pin 1 when the device 1 is viewed from the side.
The inspection pins 14 and 15 are positioned slightly above the upper end of the inspection pin 5 so that the light beam is reflected when the inspection pins 14 and 15 slide upward.

As mentioned above, since this is a device that simultaneously inspects two needle bearings 2, two sets of the phototubes 23 and 24 are attached to the left and right together with the support member 22.

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

First, the needle bearing 2 that has been conveyed on the upper surface of the track 3 is parked below the device 1 (the state shown in FIG. 2). The needle bearing 2 is assembled with an outer ring 2a, a large number of needles 20 assembled along the inner peripheral surface of the outer ring 2a, and a round bar-shaped dummy shaft 21 that serves as a center guide for the needles 20. be.

Next, when the test pin holder 7 is lowered by operating the cylinder 9 and extending the cylinder shaft 8 downward, the lower ends of the needle test pin 14 and the dummy shaft test pin 15 are connected to the needle 2.
0 and the upper end of the dummy shaft 21.
Further, when the test pin holder 7 is lowered, each of the test pins 14 and 15 presses the tips of the test pins 14 and 15 against the needle 20 and the dummy shaft 21 and connects them to the upper side of the large diameter portions 14a and 15a, respectively.
Coil spring 1 between the bottom surface of plate 18
6, 17 while compressing the test pin holder 7.
The test pin holder 7 is in a state in which it slides upward in the respective fitting holes 12 and 13 (actually, only the test pin holder 7 is moved down). Then, each of the inspection pins 14,
The upper end side of 15 further protrudes and blocks the extension line of the ends 23a, 24a of each phototube 23, 24 and reflects the light beam, so that each inspection pin 14, 15 is It is detected that the needle 20 and the dummy shaft 21 have slid upward, and at the same time, the detection causes the needle 20 and the dummy shaft 21 to move upwardly.
It is found that the product has been correctly assembled, and the pass/fail status is indicated by, for example, an identification lamp, a buzzer, etc., and non-defective products are distinguished from non-defective products by switching the shutter of the defective product sorting device. Note that the test pin holder 7 descends until each of the test pins 14 and 15 protrudes and slides to a certain height.

After the inspection, when the cylinder shaft 8 is contracted by the operation of the cylinder 9 and the inspection pin holder 7 is raised,
Coil spring 1 that was compressed during the descending process
Needle inspection pin 14 due to the repulsive force of 6 and 17
Then, the dummy shaft inspection pin 15 is pushed back downward and returns to its original position (the state shown in FIG. 2).

Next, as shown in FIG. 4, if the needle 20 and the dummy shaft 21 are not assembled into the outer ring 2a, when the inspection pin holder 7 is lowered to the lowest position, the needle inspection pin 14 and the dummy shaft are inspected. The lower end of the pin 15 enters into the outer ring 2a. That is, at this time, each test pin 14, 15 is connected to the test pin holder 7.
does not slide and the upper ends of the phototubes 23 and 24 do not block the emitted light rays on the extension lines of the ends 23a and 24a, so detection is not performed. It is indicated that there is an abnormality, and for example, the needle 20 and dummy shaft 21 are sent as they are to the defective product box.

Here, the shape of the dummy shaft 21 is made into a round bar shape, but if a spline shaft 30 having grooves 30a for holding the needles 20 one by one is used, for example as shown in FIG. This must be done for each book. However, when a round bar-shaped dummy shaft 21 is used, as shown in FIG. 6, even when only one of the needles 20 is missing, as the test pin holder 7 descends, the virtual Since the lower end of the needle test pin 14 indicated by the line pushes the remaining needles 20 left and right and enters the inserted state, the needle test pin 1
4 does not slide against the test pin holder 7;
Since the phototube 23 is not detected, it is indicated that there is an abnormality in the assembly of the needles 20 without checking all the needles 20. Therefore, in this way, the round bar-shaped dummy shaft 2
1, the assembled state of the needle 20 can be inspected at once.

In addition, in the above-mentioned normal assembly state, such an inspection can be performed because there is no gap between the needles 20 into which the needle inspection pin 14 can be inserted.

In addition, in the above embodiment, each inspection pin 1
Although the configuration uses phototubes 23 and 24 as detection means for detecting that the test pins 4 and 15 have slid upward, a limit switch that connects and disconnects the contact by the sliding of each test pin 14 and 15, and a It may also be configured as a reed switch in which a contact piece made of a magnetic material is actuated by the approach of the two parts.

As described above, according to the needle assembly inspection device of the present invention, the needle inspection pin, which is biased downward by a spring, is provided in the inspection pin holder, which is provided so as to be vertically movable, so as to be slidable in the vertical direction. , when the test pin holder is lowered, the lower end of the needle test pin is arranged so as to be in pressure contact with the upper surface of the needle of the needle bearing, and the test pin is moved upwardly by the pressure contact with the test pin holder. Since the present invention is equipped with a detection means for detecting that the bearing has slid, it is possible to accurately inspect the needles in a single needle bearing, and this has the effect of making it possible to respond to full automation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a needle bearing assembly inspection device according to the present invention, FIG. 2 is a side sectional view of the needle bearing assembly inspection device shown in FIG. 1, and FIG. 3 is a needle in a normal assembled state. A sectional view illustrating the case where the test pin holder is lowered with respect to the bearing; FIG. 4 is a sectional view illustrating the case where the test pin holder is lowered with respect to a needle bearing whose assembled state is abnormal; FIG. 5 is a plan view illustrating a case in which a spline shaft is provided at the center of the needle bearing, and FIG. 6 is a plan view illustrating a case in which a round bar-shaped dummy shaft is provided at the center of the needle bearing. 1...Needle bearing assembly inspection device, 2...
... Needle, 7 ... Test pin holder, 14 ... Needle test pin, 15 ... Dummy shaft test pin, 16, 17 ... Spring, 20 ... Needle, 21 ... Dummy shaft, 23, 24 ... Phototube (Inspection means).

Claims (1)

[Claims] 1 A device for inspecting the presence or absence of needles in a needle bearing, in which a needle inspection pin, which is urged downward by a spring, is slidably provided in the vertical direction on an inspection pin holder that is provided to be movable up and down, and the above-mentioned inspection is carried out. When the pin holder is lowered, the lower end of the needle test pin is arranged so as to be able to come into pressure contact with the upper surface of the needle of the needle bearing, and the test pin slides upward onto the test pin holder due to the pressure contact. A needle bearing assembly/inspection device characterized by being provided with a detection means for detecting movement.