JP2005349529A - Contact type jig for detecting component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact type jig for detecting a component without the occurrence of breakage which is high in versatility and can reduce designing manhours and whose designing costs are inexpensive. <P>SOLUTION: The jig 10 is mounted to an axially movable moving shaft 100 and detects the presence/absence or the position of a component by contact. The jig 10 comprises at least a support block 1, which is provided with a side face mounting hole 11 for mounting it to the moving shaft 100 via a bracket 102, a spline shaft 2, which is slidably held to a holding hole 12 provided to the support block, an abutment pin 3, which is mounted to one end of the spline shaft and for being brought into contact with the component, and a sensor 4 which is mounted to the support block 1 and detects the movement of the spline shaft 2 to the support block 1. The jig detects the presence/absence or the position of the component by the sensor 4, which detects the presence/absence of the movement or a moving amount of the spline shaft 2 to the support block 1 caused by the contact of the abutment pin 3 with the component when the moving shaft 100 is axially moved and stopped. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a contact-type component detection jig, and more particularly to a contact-type component detection jig that is highly versatile, has a small design man-hour, and is low in design cost.

  Conventionally, as a method of inspecting whether a screw or other component is correctly attached to a product, a contact-type component detection jig is attached to the shaft of an inspection apparatus having a shaft that moves up and down or horizontally. There is a method to detect the presence or absence.

  For example, a sensor bracket is attached to a detection jig having a contact sensor (see, for example, Patent Document 1) directly on a moving shaft such as a pneumatic or hydraulic cylinder that moves up and down, or via a mounting plate attached to the moving shaft. Use it, set the product to be inspected in the inspection device, move the moving shaft downward by a predetermined distance and stop it, and detect the presence or absence of the component depending on whether the component was detected by contacting the contact sensor at that time .

  However, this jig does not have the parts correctly mounted, and if it is lifted due to poor tightening of screws, etc., the contact sensor may be damaged due to excessive load applied to the contact sensor. May occur. Further, when the part is easily damaged such as a glass part, the part itself may be damaged.

  On the other hand, as another example of the detection jig, the abutting shaft is slidably held in the holding hole of the support body attached to the moving shaft of the inspection device, and the abutting pin is coaxially attached to the lower end of the abutting shaft. In addition, there is one in which a proximity sensor is attached to a support. In this case, when the moving shaft is moved and stopped by a predetermined distance, if the abutting pin comes into contact with the part, the abutting shaft moves upward. Is detected. A plurality of jigs may be attached depending on the inspection object.

  This jig is an arm-shaped part (offset part) when the abutting pin is shifted from the axis of the abutting shaft in order to avoid spatial interference with, for example, a product or another detection jig. ) Between the butting shaft and the butting pin and offset. However, in this case, the abutting shaft rotates around the axis, and the offset parts and the abutting pins are displaced from the predetermined positions. Therefore, the offset parts are rotated by using two abutting shafts. It had to be fixed so as not to be misaligned. For this reason, the shape of the jig must be changed according to the presence / absence of offset, position and amount, etc., so the total number of parts increases, and these shapes must be designed separately, so the versatility is low and the design It took a lot of man-hours and the unit price of the jig was also high. In addition, since the number of parts constituting the jig increases and the jig becomes large, there is a problem that interference between jigs becomes more conspicuous when detecting parts mounted with high density. Therefore, the inspection apparatus using the jig as described above has to design the arrangement of the jig according to the shape thereof, and the design man-hour is increased.

JP 2000-65513 A

  It is an object of the present invention to provide a contact-type component detection jig that is highly versatile, has a small number of design steps, is low in design cost, and is not damaged.

  In order to achieve the above object, the present invention is a jig that is attached to a moving shaft that is movable in the axial direction and detects the presence or position of a component by contact, at least for attaching to the moving shaft via a bracket. A support block having a side mounting hole; a spline shaft slidably held in a holding hole provided in the support block; and an abutting pin attached to one end of the spline shaft for contacting a part; The jig is attached to the support block and detects a movement of the spline shaft relative to the support block. When the sensor detects whether or not the spline shaft has moved relative to the support block due to contact with a part, or the amount of movement, the part Providing a contact part detecting jigs, characterized in that in order to detect the presence or position of (claim 1).

  Thus, at least the support block, the spline shaft, the abutting pin, and the sensor, and the spline due to the contact of the abutting pin with the component when the moving shaft moves in the axial direction and stops. If the sensor detects the presence / absence or the amount of movement of the shaft relative to the support block, the sensor will not be damaged even if there is a component floating, etc. Since the rotation is stopped by one spline shaft, a jig having the same shape can be formed regardless of the presence or amount of offset. Further, since one type of jig shape can cope with various usage conditions, the versatility is high, and the design man-hour and cost can be reduced and the cost can be reduced.

In this case, it is preferable that the abutting pin is mounted coaxially with the spline shaft.
When detecting the presence or position of a part directly under the jig, if the abutment pin is mounted coaxially with the spline shaft in this way, the part will be pushed into the part directly under the jig. Since the contact pin can be brought into contact, the shape is suitable for component detection.

Further, the abutting pin may be attached by being offset from the spline shaft by an offset component.
Even when the parts are densely mounted and the jigs interfere with each other or when the product has a complicated three-dimensional shape and interferes with the jigs, even when the jigs cannot be placed directly above the parts to be detected, In this way, if the abutting pin is offset and attached from the spline shaft by an offset part, the abutting pin is directly above the part by the offset even if the jig itself is not located immediately above the part. Since it can be arranged, it has a shape suitable for component detection, and even with one spline shaft, the offset component does not rotate, so it is smaller than the conventional two shafts and the number of components can be reduced. The shape design is also easy, and the design man-hours and costs can be reduced and the design can be made inexpensive.

The spline shaft is preferably a ball spline shaft.
In this way, if the spline shaft is a ball spline shaft, the shaft slides smoothly, is reliably prevented from rotating, and has a long life.

Preferably, the side surface mounting holes are provided in at least three directions on the side surface of the support block, and are used for mounting the jig to the bracket from any one of the three directions on the side surface. 5).
Thus, if the side surface mounting holes are provided in at least three directions of the side surface of the support block in order to mount the jig to the bracket from any one of the three directions of the side surface, the degree of freedom of the mounting position and direction is increased. Even if it is one kind of jig, it can be arranged corresponding to various usage conditions. Therefore, if this jig is used, the design man-hour and design cost of the inspection apparatus can be reduced.

The sensor is a photosensor, and the photosensor detects a dog attached to one end of the spline shaft opposite to the abutment pin, thereby detecting movement of the spline shaft relative to the support block. (Claim 6).
As described above, if the sensor is a photo sensor and the photo sensor detects a dog attached to one end opposite to the abutment pin of the spline shaft, the movement of the spline shaft relative to the support block is detected. , More accurate detection is possible.

In addition, it is preferable that the spline shaft includes a spring mechanism for restoring to a position before moving with respect to the support block.
Thus, if the spline shaft is provided with a spring mechanism for restoring to the position before moving relative to the support block, it can be restored quickly and reliably to the original position after the inspection.

  ADVANTAGE OF THE INVENTION According to this invention, the versatility, the design man-hours are few, a design cost is cheap, and the contact-type component detection jig which is not damaged is provided.

  Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited thereto.

FIG. 1 is a schematic view showing an example of a contact-type component detection jig according to the present invention.
The contact-type component detection jig 10 is provided in the support block 1 provided with a side surface mounting hole 11 and attached to a connection plate 101 of a moving shaft 100 of an inspection apparatus (not shown) via a bracket 102 and the support block 1. The spline shaft 2 held in the holding hole 12, the abutment pin 3 attached to the lower end of the spline shaft 2, and the sensor 4 attached to the support block 1. As shown in FIG. 1, the side surface mounting holes 11 are preferably provided in at least three directions of the front surface, the back surface, and the left side surface of the support block 1. The spline shaft 2 has a dog 5 attached to the upper end of the spline shaft 2 that also serves to prevent the shaft from lowering, and a spring 6 for restoring the position of the spline shaft 2 after the inspection. The moving direction of the moving shaft is the vertical direction in the example shown in FIG. 1, but it may be the horizontal direction or other directions, and is appropriately determined according to the type of product to be inspected, the position and type of the component to be detected, etc. .

  FIG. 2 is an explanatory diagram for explaining an example of the detection operation of the detection jig 10. First, the product 103 to be inspected is set in the inspection apparatus. When the inspection apparatus is operated, the moving shaft 100 moves from the upper side to the lower side by a predetermined distance, for example, 400 to 600 mm, and stops. At that time, if a part, for example, a part 104 such as a screw, is attached at a predetermined location, the abutting pin 3 comes into contact with the part 104 and the spline shaft 2 has a height of the part 104 with respect to the support block 1. For example, it rebounds upward by 2 to 3 mm and stops. And by detecting this rebound with the sensor 4, it detects that the components 104 exist. In this case, it is determined that the component 104 is attached at a predetermined location. When the part 104 is not attached, the abutting pin 3 does not contact the part, so that no rebound occurs. In this case, since the sensor 4 does not detect rebound, it is determined that the component 104 is not attached at a predetermined location. The detection by the sensor 4 detects rebound if the dog 5 stops within the detection range 41 of the sensor 4 due to rebound as in the example shown in FIG. 2 (FIG. 2A). If it stops, it can be said that a rebound is not detected (FIG.2 (b)). The detection result may be notified to the operator by, for example, a lamp or an alarm provided in the sensor itself or the inspection apparatus.

  In the same way, it is possible to detect the position of the component, for example, whether the component is mounted at a predetermined height or whether the component is lifted or sinked. In this case, when the abutting pin 3 comes into contact with the component 104 and the spline shaft 2 rebounds to the support block 1 and stops, it is detected whether or not the spline shaft 2 has rebounded by a predetermined distance. Thus, for example, the ups and downs of parts can be detected. That is, if the rebound exceeds a predetermined distance, the part floats from a predetermined position. If the rebound is equal to or less than the predetermined distance, the part sinks from the predetermined position and is attached. In this case, the ups and downs can be detected depending on whether or not the dog 5 stops within the detection range 41 of the sensor 4. For example, if the part is not floating, the dog 5 stops within the detection range 41, and if the part is floating, the dog 5 stops above the detection range 41 to detect the ups and downs of the part. Although it is necessary to change the vertical position of the jig 10 between the presence / absence detection of the component and the position detection, the position can be easily changed only by adjusting the mounting position with respect to the bracket 102.

Hereinafter, each component will be described.
The support block 1 is a rectangular parallelepiped block made of, for example, aluminum. However, the shape of the support block 1 is not particularly limited as long as the support block 1 includes a side surface mounting hole 11 and can hold the spline shaft 2 so as to be slidable. It can be designed appropriately according to the purpose of use.

  The side surface mounting holes 11 are provided in at least three directions on the side surface of the support block 1 as described above, and are preferably for mounting the jig 10 to the bracket 102 from any one of the three directions on the side surface. Since the jig detects parts attached to various positions of the product, it is preferable that the jig is attached to various positions and directions. If this is not the case, jigs with different shapes must be designed according to the mounting position and direction, etc., which increases design man-hours, increases design costs, and varies with each jig. When the jig component parts must be used, the number of parts increases and the cost increases. However, with the jig according to the present invention, such a problem is minimized.

  The spline shaft 2 is not particularly limited as long as it does not rotate around the shaft. However, a spline shaft 2 is preferable because it is reliably prevented from rotating, slides smoothly, and has a long life. The diameter and length of the shaft can be appropriately determined according to the type of component to be detected and the size of the jig. Since the jig of the present invention uses a spline shaft that does not rotate around the shaft in this way, it is highly versatile and can be applied to various usage situations with a single type of jig. In addition, if it is a commercially available ball spline and is a set of a spline nut and a spline nut having a holding hole for holding the spline shaft, the spline nut may be attached to the support block.

  Moreover, it is preferable that the spline shaft 2 includes a spring 6 for restoring to a position before moving with respect to the support block 1 described above. Even without such a spring mechanism, the spline shaft can be restored to its original position by its own weight after inspection, but if it has a spring mechanism, it can be restored quickly and reliably to its original position. Even when the moving shaft moves in the horizontal direction or moves from the bottom to the top, the spline shaft can be restored to the original position regardless of its own weight.

  The shape and material of the abutting pin 3 can be appropriately selected depending on the type and shape of the component, the mounting position, and the like. For example, when the parts are densely attached or are attached in a narrow space, a small and thin one is preferable. In addition, in the case where the part is easily broken, such as a glass part, it is preferable that the part is made of a soft material that does not break. Further, the mounting position of the abutting pin may be mounted coaxially with the spline shaft as shown in FIG. 1 or may be mounted offset from the spline shaft with an offset component.

  FIG. 3 is a schematic view showing an example of a contact-type component detection jig according to the present invention in which the abutting pin is attached by being offset from the spline shaft by the offset component 31. Such a jig is suitable for parts detection even when the parts cannot be installed directly above the part to be detected, such as when the parts are densely mounted or the product has a complicated three-dimensional shape. It becomes a shape. The offset component 31 is, for example, plate-shaped, and the length is designed as appropriate according to the offset amount. The offset part 31 has a through hole for attaching to the spline shaft 2 and the abutting pin 3 with a screw. If the hole is an oval shape, the spline shaft and the abutting pin mounting position are fine. This is preferable because it can be adjusted and the offset amount can be finely adjusted.

As the sensor 4, a proximity sensor using an electromagnetic field can be used. However, this is a photosensor that detects the movement of the spline shaft relative to the support block by detecting a dog that has entered the detection range. If so, the detection range of the photosensor is narrow, so that detection can be performed with higher accuracy than the proximity sensor. For example, in the case of a commercially available micro photo sensor, the detection range can be about 0.8 mm or less in the vertical width, so that the presence / absence and position of parts can be detected more accurately, and the ups and downs where particularly high position accuracy is required It will be suitable for detection.
Although only one jig may be attached to the connecting plate 101, it is preferable from the viewpoint of the efficiency of the inspection work that a plurality of jigs are attached to detect the presence / absence of parts at a plurality of positions at the same time.

Examples of the present invention will be described in more detail below, but the present invention is not limited thereto.
(Production of jig) Using an aluminum block with a side of about 3 cm processed into a rectangular parallelepiped as a support block, two mounting holes were made in three directions on the side surface. Then, a through hole was made from the top surface to the bottom surface, and a spline nut of a ball spline was attached to this hole. A ball spline (SSPM8-1-T1-66.5) manufactured by Nippon Bearing Co., Ltd. was used as the ball spline. Then, a steel dog with a unichromate treatment (plating) is screwed to the upper end of this ball spline shaft, a spring with a spring constant of 0.3 N / mm is passed from the lower end, and a unichromate-treated iron flat plate (37 mm × One end of 15 mm × 4 mm) was screwed, and a unichromated iron abutment pin was screwed to the other end of the iron flat plate. In addition, the screwing hole provided in the flat plate has an oval shape of 14 mm × 4 mm so that the screwing position can be finely adjusted. Then, the photosensor was attached to the support block so that the center of the optical axis (detection range) was positioned 4 mm higher than the upper end of the initial position of the dog. A U-shaped micro photo sensor (PM-L44) manufactured by Sunkus Co., Ltd. was used as the photo sensor. The width of the optical axis of the photosensor is about 0.8 mm. In addition, the photosensor is connected to the control circuit of the inspection apparatus, and the detection result is displayed on the inspection apparatus. In addition, the upper surface of the support block is processed to provide a step at each mounting position in order to appropriately maintain the positional relationship between the photosensor and the dog.

(Example 1)
(Detection of presence / absence of screw) Five jigs manufactured as described above are attached to the connecting plate of the cylinder shaft of the inspection device via a bracket, and screws are fixed to four of five predetermined positions on the surface. The plate-shaped product is set in the inspection device. Then, after adjusting the offset amount so that the abutting pin is positioned immediately above the predetermined screwing location, when the inspection device is operated, the moving shaft is lowered and stopped by 500 mm. At this time, the abutting pin hits the screw head and the ball spline shaft rebounds upward, the dog blocks the optical axis of the photosensor, the photosensor detects the dog, and the inspection device " The “OK” lamp was lit. On the other hand, the ball spline shaft did not rebound where there was no screw, and the “NG” lamp provided in the inspection device was lit. This inspection was repeated 1000 times, but the ball spline shaft was reliably prevented from rotating, and the abutment pin was not displaced.

(Example 2)
(Detection of screw floating) Next, in order to detect screw floating, the mounting height of the jig of Example 1 was increased by about 1 mm by adjusting the mounting position on the bracket. Also, one of the screws screwed in place was lifted by 2 mm and reattached. When the inspection device is activated and the moving shaft descends and stops, the spline shaft rebounds at a point where there is no screw lift, the dog interrupts the optical axis of the photosensor, the photosensor detects the dog, The “OK” lamp is lit. On the other hand, when the spline shaft rebounds at the place where the screw floats, the dog stops above the outside of the optical axis of the photosensor, the photosensor does not detect the dog, and the “NG” lamp of the inspection device lights up. .

  The present invention is not limited to the above embodiment. The above embodiment is merely an example, and the present invention has the same configuration as that of the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical idea of the invention.

  For example, in the above embodiment, the component detection jig of the present invention is used to detect the presence or absence of a screw or lift, but it can also be used for detection of an electronic component mounted on the surface, etc. It can also be used for product detection.

It is the schematic which shows an example of the contact-type component detection jig which concerns on this invention. It is explanatory drawing explaining an example of the detection operation | movement of a detection jig, (a) shows the case where a spline shaft has detected components, (b) shows the case where a spline shaft has not detected components, respectively. It is the schematic which shows an example of the contact-type component detection jig which concerns on this invention, and the abutting pin is offset and attached from the spline shaft.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Support block, 2 ... Spline shaft, 3 ... Butting pin, 4 ... Sensor,
5 ... Dog, 6 ... Spring, 10 ... Contact type component detection jig, 11 ... Side mounting hole,
12 ... Holding hole 31 ... Offset component 41 ... Sensor inspection range,
100 ... moving shaft, 101 ... connecting plate,
102 ... Bracket, 103 ... Product to be inspected, 104 ... Parts.

Claims (7)

A jig that is attached to a movable shaft that is movable in the axial direction and detects the presence or absence or position of a component by contact, and at least a support block having a side surface attachment hole for attachment to the movable shaft via a bracket; A spline shaft slidably held in a holding hole provided in the support block, an abutting pin attached to one end of the spline shaft for contacting a part, and the spline attached to the support block A sensor for detecting movement of the shaft relative to the support block;
The sensor detects whether or not the spline shaft has moved relative to the support block or the amount of movement due to the contact of the abutment pin with a component when the moving shaft stops in the axial direction. A contact-type component detection jig which detects the presence or position of a component by performing   The contact-type component detection jig according to claim 1, wherein the abutting pin is attached coaxially with the spline shaft.   2. The contact-type component detection jig according to claim 1, wherein the abutment pin is attached by being offset from the spline shaft by an offset component.   The contact-type component detection jig according to any one of claims 1 to 3, wherein the spline shaft is a ball spline shaft.   2. The side attachment holes are provided in at least three directions on the side surface of the support block, and are used for attaching the jig to the bracket from any one of the three directions on the side surface. The contact-type component detection jig according to claim 1.   The sensor is a photosensor, and detects the movement of the spline shaft relative to the support block by the photosensor detecting a dog attached to one end of the spline shaft opposite to the abutting pin. The contact-type component detection jig according to claim 1, wherein the contact type component detection jig is a contact-type component detection jig.   The contact type according to any one of claims 1 to 6, wherein the spline shaft includes a spring mechanism for restoring the spline shaft to a position before moving with respect to the support block. Component detection jig.

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