JPH0737540U - Work positioning / discriminating device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a work positioning / determining device capable of reliably positioning a plurality of types of works with a simple structure and determining the types. [Structure] Positioning pins 3 and 13 that are retractable by retracting a spring 5 and these positioning pins 3 and 1
3 and a limit switch 7 for detecting whether the workpiece 3 is projected or retracted. The corresponding positioning pin among the positioning pins 3 and 13 is fitted into a positioning hole formed in a predetermined portion according to the type of the work, and the limit is set. The type of work is determined based on the detection state of the switch 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work positioning / determining device that positions a plurality of types of works and determines the types.

[0002]

[Prior art]

 In a mixed production line of automobiles where multiple types of vehicle bodies are flowed on the same line, when transporting or transferring the vehicle bodies in each process such as welding, painting, assembly, etc., a positioning device that can handle multiple types of vehicle bodies It is provided on hangers. Conventionally, as a device for positioning a vehicle body with respect to a carrier vehicle, water drain holes or the like formed on the left and right of the front floor portion of the vehicle body have been used, and a positioning pin attached to the carrier vehicle or the like has been fitted into this water drain hole. It is known that the positioning is performed (see, for example, Japanese Utility Model Publication No. 63-38998).

In addition, in each process of a mixed flow production line, in order to perform an operation such as welding and painting on various conveyed works by an automatic machine, it is necessary to determine the kind of the work and instruct the automatic machine. There is. Conventionally, a device for discriminating a work is a device for discriminating a shape difference depending on the type of the work by using a detector such as a photoelectric tube, or a device for discriminating the kind of the work by using a hole provided in the work ( For example, Japanese Utility Model Laid-Open No. 63-93245) is known.

[0004]

[Problems to be solved by the device]

 In the positioning device described in the prior art, the positioning pin is provided with a mechanism for performing positioning in conjunction with the movement of the piston by supplying fluid to the pressure chamber of the cylinder, and therefore the structure of the device is complicated. I had a problem.

Further, in the discrimination device described in the conventional technique, the structure of the device is complicated and the number of parts is large, so that there is a problem that the manufacturing is complicated and the cost is high.

The present invention has been made in view of the above problems of the conventional technology. The purpose of the present invention is to reliably position a plurality of types of workpieces with a simple structure. The purpose is to provide a workpiece positioning / discriminating device that can discriminate its type with the same device.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention comprises a positioning pin that is retractable by retracting a spring, and a limit switch that detects whether the positioning pin appears or disappears. The positioning pin corresponding to one of the positioning pins is fitted into the formed positioning hole for positioning, and the type of the work is determined by the detection state of the limit switch.

[0008]

[Action]

 The positioning pin fits into the positioning hole to position the work, and at the same time the type of work is determined by the detection state of the limit switch.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side sectional view of a work positioning / determining device according to the present invention, FIG. 2 is a plane cross-sectional view of the same, and FIG. 3 is a side view of a vehicle body positioned on a transfer carriage equipped with the work positioning / determining device. FIG. 4, FIG. 4 is a front view of the same, and FIG. 5 is an operation explanatory view of the work positioning / determining device.

As shown in FIGS. 1 and 2, the work positioning / determining apparatus 1 includes a housing 2, a positioning pin 3, an inner pin 4, a spring 5, a dog 6, and a limit switch 7. .

The positioning pin 3 projects from the pin hole 2 a of the housing 2, and the spring 5 is compressed between the opening hole 3 a of the positioning pin 3 and the inner pin 4 fixed to the bottom portion 2 b of the pin hole 2 a of the housing 2. ing. The dog 6 is provided on the lower portion 3b of the positioning pin 3, and a limit switch 7 that is turned on when the dog 6 is pressed is attached to the lower portion 2b in the housing 2.

The positioning pin 3 is biased in the protruding direction by the spring 5, but the dog 6 comes into contact with the upper portion 2d of the elongated hole 2c formed on the side surface of the pin hole 2a of the housing 2 so that the upper surface of the housing 2 It projects from 2e with a predetermined projection amount.

The tip portion 3c of the positioning pin 3 is formed in a tapered shape so that it can be easily fitted into the positioning hole 9 of the vehicle body 8 shown in FIGS. The outer diameter of the positioning pin 3 is smaller than the inner diameter of the positioning hole 9, and the vehicle body 8 placed on the carrier 10 has a clearance with which a predetermined positioning accuracy can be obtained with respect to the carrier 10. 2 f is a lid member of the housing 2.

A positioning pin 13 having the same structure as the positioning pin 3 is arranged in the same housing 2. The work positioning / determining device 1 is provided on the carrier 10 so as to correspond to four positions on the floor of the vehicle body 8 in the front, rear, left, and right.

The operation of the work positioning / determining apparatus 1 configured as described above will be described with reference to FIG. Note that FIG. 5 shows the operation of the work positioning / determining apparatus 1 installed on the carrier 10 so as to correspond to the positioning hole 9 on the rear left side of the vehicle body 8 shown in FIG. Here, assuming that three types of vehicle bodies 8A, 8B, and 8C flow through the production line, the vehicle body 8A and vehicle body 8B have positioning holes 9A and 9B, respectively, and the vehicle body 8C (not shown) has positioning holes 9A. Both 9B.

First, as shown in FIG. 5A, the vehicle body 8A is positioned on the transport carriage 10 by inserting the positioning pin 3 into the positioning hole 9A of the vehicle body 8A. At this time, the limit switch 7 is off. On the other hand, the positioning pin 13 is pressed by the floor portion of the vehicle body 8A, contracts the spring 15, and is pressed into the pin hole 12a of the housing 2. Then, the dog 16 provided on the lower portion 13b of the positioning pin 13 pushes down the lever 17a of the limit switch 17, and the limit switch 17 is turned on.

Then, the detection signals of the limit switches 7 and 17 are sent to a control panel (not shown), and the limit switch 7 is in the OFF state and the limit switch 17 is in the ON state.

Further, as shown in FIG. 5B, the vehicle body 8B is positioned on the transport carriage 10 by inserting the positioning pin 13 into the positioning hole 9B of the vehicle body 8B. At this time, the limit switch 17 is in the off state. On the other hand, the positioning pin 3 is pressed by the floor portion of the vehicle body 8B, contracts the spring 5, and is pressed into the pin hole 2a of the housing 2. Then, the dog 6 provided on the lower portion 3b of the positioning pin 3 pushes down the lever 7a of the limit switch 7, and the limit switch 7 is turned on.

Then, the detection signals of the limit switches 7 and 17 are sent to a control panel (not shown), and the limit switch 7 is in the ON state and the limit switch 17 is in the OFF state, so that it is determined as the vehicle body 8B.

The vehicle body 8C is positioned by inserting both positioning pins 3 and 13 into the positioning holes 9A and 9B. At this time, since both the limit switch 7 and the limit switch 17 are in the off state, it is determined to be the vehicle body 8C.

Further, as shown in FIG. 5C, when the positioning pin 3 is not inserted into the positioning hole 9A of the vehicle body 8A and both the limit switch 7 and the limit switch 17 are in the ON state, the vehicle body 8A Is not positioned on the carriage 10 and is identified as a positioning error.

In this embodiment, the vehicle type is determined by the combination of the ON state and the OFF state of the limit switches 7 and 17, but it is determined by the ON / OFF state of the single limit switch corresponding to each vehicle type. You can also identify the vehicle type.

Further, as the form of the detection signal of the limit switches 7 and 17, a make contact (normally open) or a break contact (normally closed) may be used.

Conventionally, when a work that requires strict accuracy, such as sealing painting, is performed by an automatic machine such as an industrial robot, it is easy to cause a shift in the rear part of the vehicle body only by positioning the front and left sides of the vehicle body floor portion. , Had a great impact on the quality of the ceiling.

However, as described above, by providing the workpiece positioning / determining device 1 on the transport carriage 10 so as to correspond to the four front, rear, left, and right positions of the floor of the vehicle body 8, the vehicle body 8 is reliably positioned, and Contributes to the stabilization of the quality of the sealing coating performed by automatic machines such as robots.

[0026]

[Effect of device]

 As described above, according to the present invention, the workpiece positioning and the workpiece type determination can be performed by the same device having a simple structure. In addition, the simple structure contributes to a reduction in the number of parts and cost compared to the case where the positioning of the work and the discrimination of the work type are performed separately and independently.

[Brief description of drawings]

FIG. 1 is a side sectional view of a work positioning / determining device according to the present invention.

FIG. 2 is a plan sectional view of a work positioning / determining device according to the present invention.

FIG. 3 is a side view of a vehicle body positioned on a transfer carriage equipped with a work positioning / determining device.

FIG. 4 is a front view of a vehicle body positioned on a carrier truck equipped with a work positioning / determining device.

FIG. 5 is an explanatory view of the operation of the work positioning / discriminating device.

[Explanation of symbols]

1 ... Work positioning / discriminating device, 2 ... Housing,
3, 13 ... Locating pin, 5, 15 ... Spring, 6,
16 ... Dog, 7, 17 ... Limit switch, 8, 8A,
8B ... vehicle body, 9, 9A, 9B ... positioning holes, 10 ... carrier truck.

Claims (1)

[Scope of utility model registration request] 1. A positioning pin provided with a spring that is retracted to move in and out freely, and a limit switch that detects whether the positioning pin comes in and out, and the positioning is performed in a positioning hole formed in a predetermined portion according to the type of work. Among the pins, fit the corresponding positioning pins to position and
A workpiece positioning / discriminating apparatus, which discriminates the type of workpiece based on the detection state of the limit switch.