JPS6143584Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dimensional inspection device for parts having relatively simple shapes.

Conventionally, when inspecting the dimensions of small parts with relatively simple shapes such as truncated cones and spheres to sort out good and defective parts, it is natural to improve inspection accuracy, but it is also important to make the sorting work highly efficient. There is a need for automation as well as automation.

This invention was made to satisfy the above requirements, and involves intermittently transporting a large number of gauge blocks with gauge holes formed therein using a conveying device, sequentially feeding parts to be inspected into the gauge holes, and checking their fit. It is an object of the present invention to provide a component dimension inspection device that detects the condition with a discrimination device and can automatically and efficiently select components to be inspected that are within allowable dimensions.

This invention will be explained below based on an embodiment shown in the drawings.

FIG. 1 shows an application of this invention to the dimensional inspection of a tapered part to be inspected, and reference numeral 1 in the figure is a conveying device. This conveying device 1 is configured to intermittently convey a belt 3 by a drive source 2, and the belt 3 is provided with a large number of gauge blocks 4 at regular pitches.

This gauge block 4 is made by overlapping and integrating an upper gauge plate 5 and a lower gauge plate 6, as shown in FIG. An upper gauge hole 5a through which the inspected part (hereinafter referred to as pin) 7 passes, and a lower gauge hole 6a through which the pin 7 having an outer diameter smaller than the allowable minimum diameter passes, and which is coaxial with the upper gauge hole 5a are provided. ing. One or more sets of both gauge holes 5a, 6a are provided in one gauge block 4.

The pins 7 aligned with the gauge block 4 supported by the belt 3 are placed upstream of the conveying device 1 in the conveying direction (on the left side in FIG. 1).
A component supply device 8 is provided for supplying parts in conjunction with intermittent conveyance. This parts supply device 8 is
The pins 7 are fed into the shutter 11 through the pipe 10 with the side with the smaller outer diameter facing downward from the alignment supply section 9, and the pins 7 are sequentially fed into the upper gauge hole 5a by opening and closing the shutter 11. The first shutter plate 11a and the second shutter plate 11b are operated in conjunction with the conveying device 1.

At a position away from the component supply device 8 in the conveyance direction, a supply confirmation device 1 is provided for confirming whether the pin 7 is fitted and supported on the gauge block 4.
2 is provided. This supply confirmation device 12 is
Inspect whether the pin 7 is fitted and supported in both gauge holes 5a and 6a without contacting the pin 7, such as an optical element or a proximity switch, and if the pin 7 is not fitted and supported continuously (for example, 5 times). (Continuously), an alarm is generated and the transport device 1 is stopped as necessary.

In addition, at a position away from the supply confirmation device 12 in the conveying direction, the height of the pin 7 supported by both gauge holes 5a and 6a is detected, and the outer diameter of the pin 7 is judged to be good or bad, and a judgment signal is sent. A discriminating device 13 is provided that outputs the following. As shown in FIG. 3, this discrimination device 13 includes a rod-shaped detector that is biased downward by a spring 15 in a cylinder 14 and detects the upper end surface position of the pin 7 in both gauge holes 5a, 6a. A piece 16 is provided at the upper end of the detection piece 16, and the detection piece 1 is operated by an operating means such as an air cylinder mechanism.
An operating piece 17 is provided to keep the pin 6 upward at all times, and optical sensors 18A, 18B, and 18C are provided near the operating piece 17 to detect the position and output a pass/fail signal regarding the outer diameter of the pin 7. It will be done. Further, a small-sized item collection tray 19 is provided below this discrimination device 13 to collect pins 7 dropped by the detection piece 16 and the like and whose outer diameter is less than the allowable size. Accordingly, it is extended below the component supply device 8.

Further, a defective product discharge device 20 is provided at a position away from the discrimination device 13 in the conveying direction, and is operated in conjunction with a dimensional defect signal from the discrimination device 13.
This defective product discharge device 20 includes both upper gauge holes 5.
A pin protruding piece 21 is provided to insert the pin 7 from below into the pins a and 6a and remove the pin 7 whose outer diameter exceeds the allowable dimension. This is carried out after a delay using an air cylinder mechanism or the like. A pin 7 is provided above the pin projecting piece 21 of this defective product ejecting device 20.
A blower 22 for forcibly blowing away the pins 7 is provided, and a large size product collection tray 19 is provided below the defective product discharge device 20 to collect the dropped pins 7.

Furthermore, near the reversing portion of the belt 3 that is away from the defective product discharging device 20 in the conveying direction, a non-defective product collecting device 24 is provided for taking out pins 7 having appropriate dimensions. This good product collecting device 24 includes a pin 7 that is placed over the gauge block 4 at the inverted portion of the belt 3.
a pressing belt 25 that supports until it faces downward;
A large number of rollers 26 supporting this pressing belt 25 in an arc shape matching the shape of the inverted portion of the belt 3 so that it can run freely, and collecting the pins 7 that fall from the gauge block 4 arranged below the pressing belt 25. A good product collection tray 27 is provided. In addition, this non-defective product collecting device 24 includes both gauge holes 5a,
In order to facilitate separation of the pin 7 from the pin 6a, the above-mentioned blower 22 or pin projecting piece 21 is provided as appropriate.

In FIG. 1, the reference numeral 28 is a positioning device that detects holes or grooves formed on the sides of the belt 3 to determine whether there is a pitch shift during intermittent conveyance.

Further, to supplement the relationship between the belt 3 and the gauge block 4, both the gauge holes 5a and 6a are
Considerations are made such as forming a through hole in a portion corresponding to a or forming a gap.

In the component dimension inspection apparatus configured in this manner, dimension inspection and sorting work are performed simultaneously and automatically. That is, when the conveying device 1 is operated to intermittently convey the gauge blocks 4 in the direction of arrow A in FIG. At the timing of the temporary stop, the second shutter plate 11b is opened and the pin 7 between the first and second shutter plates 11a and 11b is supplied to the upper gauge hole 5a. If the outer diameter of the pin 7 supplied to the upper gauge hole 5a is smaller than both gauge holes 5a and 6a, the pin 7 passes through both gauge plates 5 and 6 as shown in FIG. The pins are collected in the collecting tray 19, and if the outer diameter of the pin 7 is larger than either of the gauge holes 5a and 6a, they are sent in the conveying direction one by one. Further, the second shutter plate 11b is closed after dropping the pin 7, and then the first shutter plate 11a is closed.
is opened, supplies the next pin 7 onto the second shutter plate, and is closed again, and these operations are repeated each time a gauge block 4 is fed directly below the pipe 10.

Next, in the supply confirmation device 12, each time the gauge block 4 passes, both gauge holes 5a and 6 are opened.
It is detected whether or not the pin 7 is fitted into the pin a, and if the pin 7 remains unfitted and not supported, a process such as an alarm is issued as described above. Normally, the pins 7 are supplied one after another from the upstream parts supply device 9, and it is rare that there are consecutive defective products that pass through both gauge holes 5a and 6a, that is, pins 7 whose outer diameter is less than the allowable limit. If the pin 7 is not present in the gauge block 4 continuously, it is determined that parts supply is not being carried out smoothly.
Processes such as stopping and inspecting the transport device 1 are performed.

Next, in the discrimination device 13, both gauge holes 5a,
An operation is performed to measure the height of pin 7 within 6a. As shown in FIGS. 2 and 3, the position of the pin 7 supported by both gauge holes 5a, 6a varies due to the difference in outer diameter, so the operation lever is 17 and detecting piece 1.
6 is projected downward by the biasing force of the spring 15. If the outer diameter of the pin 7 is less than the allowable dimension, the
If the detection piece 16 is lowered to the state where it is inserted into both gauge holes 5a and 6a as shown in FIG. If it exceeds the allowable dimension, the detection piece 16 is supported on the upper end surface of each pin 7, and the height of the operation piece 17 changes, as shown in FIG. 3C. The position of this operation piece 17 is determined by optical sensors 18A, 18B, 18.
When the optical sensors 18A and 18C detect the operating piece 17, the discrimination device 13 outputs a dimensional defect signal. After the detection piece 16 is projected downward, the detection piece 16 is pulled up by an air cylinder mechanism or the like prior to the next conveyance operation of the pin 7. In addition, since the detection piece 16 is made to protrude by the biasing force of the spring 15 during these actions, it resists the resistance force such as "burrs" attached to the edges etc. during the machining of the pin 7. Accurately insert the pin 7 within the allowable dimensions into the lower gauge hole 6a.
Although the pin 7 is corrected until it is fitted, the pin 7 is not pushed into the gauge holes 5a, 6a more than necessary.

Next, when a dimensional defect signal is output from the discrimination device 13, the pin 7 determined to be dimensional defective is conveyed to the downstream defective product discharging device 20 and stopped, and at the same time, the pin is removed by an air cylinder mechanism. The protruding piece 21 protrudes upward to remove the pin 7 supported in the upper gauge hole 5a, and is further blown off from above the belt 3 by the air blower 22, so that the pin 7 is collected in the large size collection tray 23. In this embodiment, the pin projecting piece 21 is also operated when the optical sensor 18C at the front stage detects a pin 7 whose outer diameter is less than the allowable size.
Further, the pin projecting piece 21 instantly descends to its original position and is ready for the next conveyance operation. The pins 7 ejected from the gauge block 4 by the pin projecting piece 21 are then dropped from the upper surface of the belt 3 onto the large size collection tray 23 by the blower 22. Therefore, only pins 7 of appropriate dimensions are left in the gauge block 4 after the defective product discharge device 20 and sent to the non-defective product collection device 24.

Next, in the non-defective product collecting device 24, the pressing belt 25 is brought into contact with the surface of the gauge blocks 4 that are sent in sequence, and the pins 7 are guided downward while preventing the pins 7 from popping out, so that the upper gauge holes 5a of the gauge blocks 4 are directed downward. The contact state is released near the position facing the pin 7, and the pin 7 is caused to fall into the good product collection tray 27 by its own weight. At this time, the pressing belt 25 sequentially moves in response to the intermittent conveyance of the discharging device 1 through contact with the gauge block 4, and sequentially guides the pins 7 whose outer diameters are within the allowable range to the good product collection tray 27. perform an action.

The pins 7 sequentially supplied to the gauge block 4 in this way are connected to both the gauge holes 5a and 6 shown in FIG.
Each tray 19, 23,
The pins 7 are sorted and collected at 27, and the above-mentioned use is repeated every time the pins 7 are supplied from the component supply device 8.

As explained above, this device intermittently transports a gauge block having upper and lower gauge holes formed according to the upper and lower limits of allowable dimensions using a conveying device, and inserts the parts to be inspected into the gauge holes of the gauge block. After supplying the parts one by one and making them fit, remove the small ones that are outside the dimensional tolerance by letting them fall naturally, then insert the detection piece into the gauge hole from above and measure the height of the part to be inspected at this time. Based on the results of this discrimination, among the parts to be inspected supported in the gauge hole, those with defective dimensions are ejected by inserting a protruding pin into the gauge hole from below, and the parts remaining in the gauge hole are ejected. Since the parts with defective dimensions are taken out last, it is possible to carry out continuous and automatic dimensional inspection of parts efficiently, and also to remove parts with small dimensions and those that are outside the dimensional tolerance range. It is possible to automatically sort and classify large items and non-defective items within the dimensional tolerance range.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a side view explaining the overall configuration, Figure 2 A, B,
C is an explanatory diagram of the fitted state of the gauge block and the part to be inspected, and FIG. 3 is an explanatory diagram of the discriminating state of the discriminating device. 1... Conveyance device, 4... Gauge block, 5...
...Upper gauge plate, 5a...Upper gauge hole, 6...Lower gauge plate, 6a...Lower gauge hole, 7...Parts to be inspected (pin), 8...Parts supply device, 13...Discrimination device, 16 ...detection piece, 20 ... defective product ejection device,
21... Pin projecting piece, 24... Good product collection device.

Claims (1)

[Scope of utility model registration request] an upper gauge plate 5 having a gauge hole 5a equal to the maximum allowable outer diameter of the component to be inspected 7; and a gauge hole 6 having a gauge hole 6 equal to the minimum allowable outer diameter of the inspected component 7.
a gauge block 4 which is formed by combining a lower gauge plate 6 having a vertical axis and a lower gauge plate 6 vertically so that both gauge holes are coaxial; a conveying device 1 that supports a large number of gauge blocks and conveys them intermittently at a fixed pitch; A component supply device 8 supplies the parts to be inspected aligned to the gauge block in conjunction with a conveyance device, and a detection piece 16 is inserted from above into the gauge hole away from the component supply device in the conveyance direction so that the parts to be inspected are A determination device 13 that determines the height of the inspected part by determining whether it is supported or not supported by one of the gauge holes and outputs a dimensional pass/fail signal, and a determination device 13 that determines the height of the component to be inspected by determining whether it is supported by one of the gauge holes or not, and outputs a dimensional pass/fail signal; It is equipped with a defective product discharging device 20 that inserts a pin projecting piece 21 into a gauge hole in response to a pass/fail signal, and a non-defective product collecting device 24 that takes out inspected components that are spaced apart in the transport direction from the defective product discharging device and have appropriate dimensions. Parts dimension inspection device.