JP2008222333A - Positioning device using positioning pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrict damage to a material to be conveyed by a positioning pin, to reduce the number of detectors for detecting positioning state (normal loading state) and positional misalignment state (abnormal loading state), and to restrict an increase of costs. <P>SOLUTION: Lower ends of two of a right and a left positioning pins 2 and 3, which are supported freely to slide in the vertical direction by a base body 6 provided in a load receiver part 9 of a conveyor and which have tapered parts 2A and 3A tapered upward, are connected to right and left loose ends of a swing arm 5 extended in the lateral direction and supported in a central part thereof by a spindle 5A in the back and forth direction freely to vertically swing so that when one positioning pin is lowered, the other positioning pin is raised. A material W to be conveyed is positioned to the load receiver part 9 by inserting the positioning pin 2 positioned in the raising position into a positioning hole H formed in the material W to be conveyed placed in a receiver member on the load receiver part 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a positioning device using positioning pins that positions a transported object on a load receiving portion of a conveyor by inserting a positioning pin into a positioning hole formed in the transported object.

  As a positioning device using a conventional positioning pin, two positioning pins having an upward tapered taper portion supported by a compression coil spring are provided on housings attached to the front, rear, left, and right of a carriage, etc. A positioning pin is inserted into the positioning hole of the vehicle body to position the carriage relative to the carriage and the like, and a limit switch that detects the presence / absence of each positioning pin is provided so as to be compatible with a mixed flow production line (for example, , Refer to Patent Document 1), and the position of a reference pin (positioning pin) to be inserted into the reference hole (positioning hole) of the automobile body can be changed so as to correspond to a mixed flow production line (for example, see Patent Document 2) .) Etc.

Utility Model Registration No. 2595572 (Fig. 1-5) Japanese Utility Model Publication No.6-21621 (Fig. 1-3)

The configuration and operation of the prior art similar to that of Patent Document 1 will be described with reference to FIG. The positioning device using the positioning pins shown in FIG. 4 has two positioning pins 13 and 14 having upper tapered portions 13A and 14A formed therein. The positioning pins 13 and 14 are compression coil springs. In a state of being elastically supported by 16, 16, it is supported by the support members 15, 15 so as to be slidable in the vertical direction.
A receiving member 10 such as a carriage or a hanger for a conveyor is provided with a receiving member 10 that supports a conveyed object W such as an automobile body from below and receives the load, as shown in FIG. In addition, by inserting the positioning pin 13 into the positioning hole H of the bottom plate P of the object to be conveyed W, the object to be conveyed W is placed on the receiving member 10 while being positioned on the load receiving part 9. Further, with respect to another type of transported object W in which different positioning holes H are formed, the transported object W is positioned at the load receiving portion 9 by inserting the positioning pins 14 into the positioning holes H. Therefore, it is possible to cope with a mixed flow production line.
Here, the positioning pins 13 and 14 are positioning guide pins, and in order to be able to absorb a position error in the horizontal plane in a range where the side edge of the positioning hole H contacts the tapered portions 13A and 14A. It is necessary to increase the spring constant of the compression coil springs 16 and 16 as much as possible, and to increase the force for urging the positioning pins 13 and 14 upward by the restoring force when the springs are elastically deformed.
Accordingly, in the state of FIG. 4A, the positioning pin 14 that is not used for positioning is biased upward by the large restoring force of the elastically deformed spring 16, and the pointed end at the upper end of the positioning pin 14 is the object W to be conveyed. Since the state where the lower surface of the bottom plate P is strongly pressed is maintained, the conveyed object W may be damaged.
Further, as shown in FIG. 4B, both the two positioning pins 13 and 14 are placed on the receiving member 10 even in a misaligned state where both of the positioning pins 13 and 14 are not engaged with the positioning hole H of the conveyed object W. Since the lower surface of the bottom plate P of the object to be conveyed W is strongly pressed by the tip portions of the upper ends of the positioning pins 13 and 14, the object to be conveyed W may be damaged.
Further, in the positioning state of FIG. 4A, the operation piece 17 does not swing the detection piece 11A, the detector 11 is turned off, the operation piece 18 swings the detection piece 12A, and the detector 12 is turned on. As described above, when one of the detectors is turned on, it can be seen that the normal loading state in which the positional deviation does not occur. In the positional deviation state of FIG. 4B, the operation pieces 17 and 18 move the detection pieces 11A and 12A. Since the detectors 11 and 12 are turned on by swinging, and it is configured so that an abnormal loading state in which a positional shift occurs when both detectors are turned on as described above, the positioning pins 13 , 14 must be provided with detectors 11, 12.

  Furthermore, in the configuration of Patent Document 2, it is necessary to change the position of the reference pin (positioning pin) by manpower or a switching device according to the type of vehicle flowing in the mixed flow production line, and the cost is increased due to the complicated structure. To do.

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that it is possible to suppress the damage of the object to be conveyed by the positioning pin, and to detect the positioning state (normal loading state) and the misalignment state (abnormal loading state). The object is to provide a positioning device using positioning pins that can reduce the number of detectors to be performed and suppress an increase in cost.

  In order to solve the above-described problem, the positioning device using the positioning pin according to the present invention has two left and right tapers each having an upper tapered taper supported so as to be slidable in the vertical direction by a base provided on the load receiving portion of the conveyor. By connecting the lower end of the positioning pin to the left and right free ends of the swinging arm that extends in the left-right direction and whose center is supported by the support shaft in the front-rear direction and swings up and down, one positioning pin can be lowered. Accordingly, the other positioning pin is configured to be raised, and the raised positioning pin is inserted into a positioning hole formed in the object to be transported placed on the receiving member on the load receiving portion. The conveyed product is positioned on the load receiving portion.

  Here, in the state in which the swing arm is substantially horizontal, the left and right free ends thereof are positioned directly below the two positioning pins, and the upper end is defined by the lower end portion of the positioning pins and the longitudinal support shaft. It is preferable to include two right and left connecting arms that are connected to each other and whose lower ends are connected to the free end portion of the swing arm by a support shaft in the front-rear direction.

According to the positioning device using the positioning pins according to the present invention, the lower end portions of the two left and right positioning pins having an upper taper taper portion supported by the base provided on the load receiving portion of the conveyor so as to be slidable in the vertical direction. Is connected to the left and right free ends of the swinging arm that extends in the left-right direction and whose center is supported by the support shaft in the front-rear direction and swings up and down, so that when the one positioning pin is lowered, the other positioning pin And by inserting a positioning pin at the raised position into a positioning hole formed in the object to be conveyed placed on the receiving member on the cargo receiving part, the object to be conveyed is Since the positioning pins are positioned so as to correspond to the positioning holes of the two models of the object to be transported, when the model of the object to be transported is switched, the object to be transported immediately after the model switching is received. When placed on the receiving member on the part, one positioning pin pushed by the bottom surface of the conveyed object descends, and the other positioning pin rises as the positioning pin descends, and the conveyed object immediately after the model change The two positioning pins can be automatically selected according to the model in the mixed flow production line.
Moreover, since the positioning pin is not elastically supported by the compression coil spring and the positioning pin is not pressed against the object to be conveyed by the restoring force of the compression coil spring, the damage to the object to be conveyed by the positioning pin is suppressed. be able to.
Furthermore, in a positioning state in which one of the two positioning pins is inserted into a positioning hole formed in the conveyed object, the conveyed object is placed on the receiving member, and both of the two positioning pins are both In a misaligned state where the object is not inserted into the positioning hole formed in the object to be conveyed, the object to be conveyed is placed on the two positioning pins without being placed on the receiving member. Since the positioning state (regular loading state) is different from the misalignment state (abnormal loading state), both the positioning state and the misalignment state are detected by only one detector that detects the difference in height position. Can do.
In addition, if a detector that outputs the angle or inclination of the swing arm or outputs three positions of horizontal and vertical two positions is provided, for example, on the support shaft in the center of the swing arm, positioning is performed with only this one detector. It is possible to detect the state and misalignment and to detect the model.
In addition, since the configuration is simple, an increase in cost can be suppressed and operation reliability is high.

  In addition, in the state where the swing arm is substantially horizontal, the left and right free ends thereof are located directly below the two positioning pins, and the upper end is connected to the lower end of the positioning pin by a support shaft in the front-rear direction. In addition to the above-described effects, if one of the left and right positioning pins is provided, the lower end includes two left and right connecting arms that are connected to the free end portion of the swing arm by a longitudinal support shaft. Since the seesaw-like operation of raising and lowering the other is performed by a simple and reliable planar link mechanism composed of a swing arm and a connecting arm, the operation can be further stabilized and ensured. it can. In addition, since the upper and lower ends are pin-supported, the left and right oscillating arms that do not transmit moment extend substantially up and down, so that the positioning pins 2 and 3 can move laterally (horizontal) during the seesaw-like operation. Since almost no force acts, the operation of the left and right positioning pins that are supported by bearings such as bushes and slide up and down becomes smooth. Therefore, the reliability of positioning of the conveyed object to the load receiving part of the conveyor is improved.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste. In this specification, the direction of the horizontal support shaft 5A that supports the center of the swing arm 5 is the front-rear direction, and the direction in which the swing arm 5 extends horizontally is the left-right direction.
1 to 3 are explanatory views of a positioning device using a positioning pin according to an embodiment of the present invention, FIG. 1 is a partially longitudinal front view, and FIGS. 2 and 3 are front views showing an example of use of a detector. And FIG. 2A and 3A show a positioning state (normal loading state), and FIGS. 2B and 3B show a misalignment state (abnormal loading state).

As shown in FIG. 1, the positioning device 1 using the positioning pin according to the embodiment of the present invention can slide the two right and left positioning pins 2 and 3 having upper tapered portions 2A and 3A in the vertical direction. And a seesaw-like operation in which one of the positioning pins 2 and 3 is lowered when the other is lowered.
That is, oil-free bushings 8 and 8 are fitted in support portions 7 and 7 penetrating vertically arranged on the left and right of a base 6 provided in a load receiving portion 9 (cart or hanger) of the conveyor. The positioning pins 2 and 3 are supported by the oilless bushes 8 and 8 so as to be slidable in the vertical direction.
Further, the lower end portions of the positioning pins 2 and 3 are connected to the left and right free end portions of the swing arm 5 that extends in the left-right direction and is supported by the support shaft 5A in the front-rear direction and swings up and down. Therefore, the positioning pins 2 and 3 can perform the seesaw-like operation.
Therefore, when the positioning pin 2 is in the raised position and the positioning pin 3 is in the lowered position as shown by the solid line in FIG. 1, the positioning pin 2 in the raised position is moved to the bottom plate of the article W (for example, an automobile body). As shown in FIG. 1 by a two-dot chain line, the object to be conveyed W can be positioned with respect to the load receiving portion 9 by being inserted into a positioning hole H (for example, a drain hole of an automobile body) formed in P. When the positioning pin 3 is in the raised position and the positioning pin 2 is in the lowered position, the positioning pin 3 in the raised position is inserted into the positioning hole H formed in the bottom plate P of the conveyed object W, and the conveyed object W Can be positioned with respect to the load receiving portion 9.

In addition, when two positioning pins 2 and 3 are arranged corresponding to the positioning holes H of two types of the transported object W (for example, two types of automobiles), the model of the transported object W is switched. When the article to be conveyed W immediately after the model change is placed on the receiving member 10 on the load receiving portion 9, one positioning pin pressed by the bottom surface of the article to be conveyed W is lowered (for example, the positioning pin in FIG. 1). 3 is lowered from the raised position of the two-dot chain line to the lowered position of the solid line), and the other positioning pin is raised as the positioning pin is lowered (for example, the positioning pin 2 in FIG. 1 is moved from the lowered position of the two-dot chain line to the solid line). Since the raised positioning pin is inserted into the positioning hole H formed in the transferred object W immediately after the model change, the two positioning pins 2 and 3 correspond to the models in the mixed flow production line. Select automatically. Can.
Furthermore, since the positioning pins 2 and 3 are not elastically supported by the compression coil spring as compared with the configuration of the positioning device using the conventional positioning pins 13 and 14 as shown in FIG. The positioning pins 2 and 3 are not pressed against the conveyed object W by the restoring force of the coil spring. Therefore, it is possible to suppress damage to the conveyed object W due to the positioning pins 2 and 3. In addition, since the configuration is simple, an increase in cost can be suppressed and operation reliability is high.

Next, a connection structure between the lower end portions of the left and right positioning pins 2 and 3 and the free end portion of the swing arm 5 will be described.
In a state where the swing arm 5 is substantially horizontal, the left and right free ends thereof are located immediately below the left and right two positioning pins 2 and 3, and the upper ends of the left and right connecting arms 4 and 4 are positioned on the positioning pin 2. , 3 and the support shafts 4A, 4A in the front-rear direction, and the lower ends of the left and right connection arms 4, 4 are connected to the left and right free ends of the swing arm 5 by the support shafts 4B, 4B in the front-rear direction. The connecting arms 4 and 4 extend substantially vertically.
Accordingly, the seesaw-like operation of the left and right positioning pins 2 and 3 is performed by a simple and reliable planar link mechanism composed of the swinging arms 4 and 4 and the connecting arm 5. Can be stably and reliably performed. In addition, since the upper and lower ends are pin-supported, the left and right oscillating arms 4 and 4 that do not transmit moment extend substantially up and down, so that the positioning pins 2 and 3 move horizontally (horizontally) during the seesaw-like operation. (Direction) force hardly acts, so that the operation of the left and right positioning pins 2 and 3 which are supported by the non-lubricating bushes 8 and 8 and slide up and down becomes smooth. Therefore, the reliability of positioning of the conveyed product W to the load receiving part 9 of the conveyor is improved.
A configuration using such connecting arms 4, 4 is preferable. For example, one of the lower end portions of the left and right positioning pins 2, 3 and the left and right free end portions of the swing arm 5 is provided with a longitudinal support shaft. It is possible to adopt a configuration in which the other is fixedly loosely fitted.

Next, detection of a positioning state (normal loading state) and a displacement state (abnormal loading state) will be described.
In the positioning state in which one of the left and right positioning pins 2 and 3 as shown in FIG. 2A is inserted into the positioning hole H formed in the conveyed object W, the conveyed object W is placed on the load receiving portion 9. Placed on the receiving member 10. On the other hand, as shown in FIG. 2B, the positioning pins 2 and 3 and the positioning hole H are displaced from each other, and both the left and right positioning pins 2 and 3 are both formed on the conveyed object W. In a state where it is not inserted into the hole H, the conveyed object W is not placed on the receiving member 10 but is placed on the two positioning pins 2 and 3.
Therefore, since the height position of the conveyed object W is different between the positioning state (regular loading state) and the misalignment state (abnormal loading state), only one detector 11 that detects the difference in height position is used. Both the positioning state and the misalignment state can be detected.
That is, in the regular loading state shown in FIG. 2A, the swing angle A at which the detection piece 11A of the detector 11 is pushed by the transported object W and swings downward is, for example, about 10 ° to 15 °. In the abnormal loading state shown in FIG. 2B, when the detector 11 is turned on, the swing angle B at which the detection piece 11A of the detector 11 is pushed by the conveyed object W and swings downward is, for example, 3 ° to 5 °. The detector 11 is turned off.
Thus, in the positioning device 1 using the positioning pins 2 and 3 of the present invention, according to the configuration for detecting normal loading and abnormal loading using one detector 11 as shown in FIG. Compared with the configuration of a positioning device using conventional positioning pins 13 and 14 that require two detectors 11 and 12 such as 4, detection of a normal loading state and an abnormal loading state is performed simply and at low cost. be able to.

Further, as shown in FIG. 3, a detector 19 capable of outputting the angle or inclination of the swing arm 5 or outputting three positions of horizontal and vertical two positions, such as a rotation angle sensor or a three-contact rotary switch or toggle switch, etc. If the structure is provided on the support shaft 5A at the center of the swing arm 5 or the like, the detector 19 is in a state where the swing arm 5 is tilted up and down (up and down two positions) as shown by a solid line and a two-dot chain line in FIG. The normal loading state and the model detection can be performed by outputting the output by the detector 19, and the state where the swing arm 5 is substantially horizontal as shown in FIG. The loading state can be detected.
That is, according to such a configuration, it is possible to detect the positioning state and the misalignment state as well as the model using only one detector 19.

It is a partial longitudinal section front view of a positioning device using a positioning pin concerning an embodiment of the invention. It is a front view similarly, (a) has shown the positioning state (normal load state), (b) has shown the position shift state (abnormal load state). Similarly, it is a partial longitudinal sectional front view, (a) shows a positioning state (regular loading state), (b) shows a misalignment state (abnormal loading state). It is a partial longitudinal cross-sectional front view of the positioning device which shows the example of the positioning device using the conventional positioning pin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Positioning device 2, 3 Positioning pin 2A, 3A Taper part 4 Connection arm 4A, 4B Support shaft 5 Swing arm 5A Support shaft 6 Base 7 Support part 8 Oil-free bush 9 Load receiving part 10 Receiving member 11, 12 Detector 11A, 12A Detection piece 13, 14 Positioning pin 13A, 14A Taper 15 Support member 16 Compression coil spring 17, 18 Operation piece 19 Detector W Object to be conveyed P Bottom plate H Positioning hole

Claims (2)

The lower ends of the two left and right positioning pins, which have an upper taper taper supported by a base provided on the load receiving portion of the conveyor, are slidable in the left-right direction and extend in the left-right direction and the center thereof is supported by the support shaft in the front-rear direction. By connecting to the left and right free ends of the swing arm that is supported and swings up and down, the other positioning pin rises as one positioning pin descends,
Positioning characterized in that the object to be conveyed is positioned at the load receiving part by inserting a positioning pin at a raised position into a positioning hole formed in the object to be conveyed placed on the receiving member on the load receiving part. Positioning device using pins. With the swing arm in a substantially horizontal state, the left and right free ends thereof are located directly below the two positioning pins, and the upper end is connected to the lower end of the positioning pin by a front and rear support shaft, 2. A positioning device using positioning pins according to claim 1, comprising two left and right connecting arms extending at the lower and lower ends and connected to the free end portion of the swing arm by a longitudinal support shaft.

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