JP2742126B2 - Work positioning device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work positioning device that detects the phase of an annular work and positions it at a fixed position.

(Prior Art) As a work positioning device for detecting the phase of an annular work such as a wheel and positioning the work at a fixed position, the annular work is rotated and a hole provided on the circumference of the work is detected by a photo sensor. There is something like that.

(Problems to be Solved by the Invention) However, when the annular workpiece is rotated and the holes provided on the circumference of the workpiece are detected by the photosensor to perform positioning as described above, the time required for the detection is reduced. In order to achieve this, the rotation of the work must be accelerated. However, if the rotation of the work is accelerated, the time required for stopping becomes longer due to the relationship between the inertia and the accuracy of the stop brake, and it is difficult to perform highly accurate positioning in a short time.

(Means for Solving the Problems) In order to solve the above problems, the present invention relates to a work positioning device for detecting the phase of an annular work and positioning the work at a fixed position. A pair of light emitting elements and a light receiving element opposing each other with at least a part of the work on the turntable vertically interposed therebetween, and a plurality of photosensors provided at the center within the hollow portion of the turntable so as to be vertically movable. A sharp positioning pin is provided, and when the photo sensor detects one hole provided near the outer periphery of the work rotating on the turntable, the rotation of the work is stopped, and the positioning pin is raised to increase a plurality of bolt holes of the work. The positioning pins were inserted into the positioning pins.

Also, by operating the cylinder unit, the sensor support arm to which the above-described photo sensor is attached, outside the work,
And it was movably arranged so as to be separated downward.

(Operation) The work is rotated by the turntable, and when the photo sensor detects a hole near the outer periphery of the rotating work, the rotation of the work is stopped, and the positioning pin disposed in the hollow portion of the turntable is raised. By inserting the positioning pin into the bolt hole of the work, the displacement when the rotation is stopped is corrected.

After the positioning, the sensor support arm is moved to the outside and below the work by the operation of the cylinder unit, so that the work can be smoothly conveyed to the next process such as a press process.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall view of a work processing apparatus to which a work positioning device according to the present invention is applied, FIG. 2 is an enlarged view of a work loading station, FIG. 3 is a plan view of a work transfer station, and FIG. 5 is a cross-sectional view of a work positioning mechanism, and FIG. 6 is a plan view of the work positioning mechanism.

In the work processing apparatus, a work loading station S1, a work processing station S2, and a work unloading station S3 are arranged in this order from the upstream side. The work will be described by taking a wheel in which a disk portion and a rim portion are welded as an example.

First, the work loading station S1 is provided with a work W transport mechanism T, a work W cutout mechanism K, and a work W positioning mechanism I.

In the transfer mechanism T for the work W, guide rails 2 are provided on the upper member of the frame 1, and a shift support 3 in the form of a gate is engaged with these guide rails 2, and one end of the frame 1 is connected to the frame 1.
The other end of the cylinder unit 4 fixed to the
It is anchored in.

A vertical guide rail 5 is provided on the front surface of the shift support 3, and a lifting table 6 is engaged with the guide rail 5, and the lift unit 6 is moved up and down by the operation of a cylinder unit 7 provided on the shift support 3. I try to move it. Then, a pair of shafts 8, 8 are erected on the elevating table 6 at a distance, and one ends of levers 9, 9 are fitted to these shafts 8, 8 so as to rotate integrally with the shaft 8. The other ends of 9 and 9 are overlapped, and the rod end of the cylinder unit 11 mounted on the upper surface of the elevating table 6 is engaged with the elongated hole 10 formed in the overlapped portion. The base ends of the holding arms 12, 12 to be sandwiched and held are fitted so as to rotate integrally with the shaft 8, and the distal end of the holding arm 12 is an ejector 13. A vertical cylinder unit 14 is attached to the front surface of the shift support 3, and the rod of the cylinder unit 14 is used as a work transfer rod 15.

The cut-out mechanism K for the work W supports a pair of swing arms 22, 22 at the upper end of a support 21 disposed below the self-conveying conveyor 16 so as to be swingable in the vertical direction. One suspension rod 23 is erected on a plate (not shown) provided between the upstream ends of the 22 and a pair of cut-out rods 24, 24 are provided on a plate (not shown) provided between the downstream ends. Then, the swing arm 22 is swung up and down via a link 26 by the operation of the cylinder unit 25, so that a suspension rod 23
The cutting rod 24 alternately protrudes and descends from between the self-propelled conveyors 16 so that only one work W can enter between the temporary stop rod 23 and the cutting rod 24.

Further, an elevating frame 28 which moves up and down via a link 27 by the operation of the cylinder unit 25 is provided, and the elevating frame 28 is provided with a stopper pin which comes and goes from between the self-propelled conveyor 16 and the slide plate 17 with the up and down movement. 29 and 29 are provided.

As shown in FIGS. 5 and 6, the positioning mechanism I of the work W has a guide member 51 fixed to a base 50, and a cylindrical portion of a turntable 52 having a hollow portion 52a in the center on the outer periphery of the guide member 51. The portion 53 is rotatably fitted to the outside via a bearing 54, and a gear 56 rotated by a motor 55 mounted on the lower surface of the base 50 is meshed with a gear 57 provided on the outer periphery of the cylindrical portion 53.

A guide rod 59 is slidably inserted into a vertical guide hole 58 formed in the guide member 51, and the lower end of the guide rod 59 is connected to the rod of the cylinder unit 60 attached to the base 50, and Guide rod 59 projecting upward
A plate 61 is mounted on the upper end of the work W, and a positioning pin 62 is provided for engaging the stud bolt insertion hole W1 of the work W positioned on the plate 61 from below. The plate 61 having the positioning pins 62 on the upper surface moves up and down in the hollow portion 52a of the turntable 52. The positioning pin 62 has a sharp tip (upper end) as shown in FIG.
When inserting the stud bolt insertion hole W1 into the insertion hole W1
Is corrected in the circumferential direction, so that it can be inserted smoothly, reliably and accurately.

A support 63 is erected on the base 50, one end of a support plate 64 is rotatably supported on the upper end of the support 63, and the lower end of the cylinder unit 65 is supported on the lower end of the support 63. The rod of the cylinder unit 65 is connected to an intermediate portion of the support plate 64 so that the operation of the cylinder unit 65 causes the support plate 64 to swing up and down. Further, a guide bar 66 is provided on the support plate 64, and a sensor support arm 67 is engaged with the guide bar 66, and a light emitting element 68 and a hole element 69 are respectively provided at the ends of the arms divided above and below the sensor support arm 67. Is installed.

Further, a pull-out knob 70 penetrates through the support plate 64, and a support plate 74
The support plate 64 is provided with an insertion hole 72 through which the insertion pin 71 engages, and a spring 73 is interposed between the insertion / removal knob 70 and the sensor support arm 67. ing.

The work processing station S2 is provided with a press 80 for correcting the shape of the work after press-fitting. This press machine 80
Is composed of an upper die 81 and a lower die 82. The upper die 81 is attached to an elevating platform 83, and the lower die 82 is fixed on a base 84. Four columns 85 are suspended downward from the lower surface of the elevating table 83, and a pair of work support rails 86 are mounted between the lower ends of these columns. The work support rail 86 is lower than the upper end of the work W without interfering with the work W when the lift 83 is lowered, and locks the work W when the lift 83 is raised. Lift from the lower mold 82.

An inclined shooter 91 and a self-propelled roller 92 are disposed at the work unloading station S3.

The operation of the work processing apparatus having the above configuration will be described below.

First, the work W temporarily press-fitted in a set station (not shown) of the work W is sent to the work carry-in station S1 by the self-propelled conveyor 16 via the main press-fitting device.

The work W sent into the work loading station S1 is temporarily stopped on the self-propelled conveyor 16 by the suspending rod 23 of the cutting mechanism K. Next, the suspension rod 23 retracts due to the extension movement of the cylinder unit 25 of the cutting mechanism K, and the cutting rod 24 projects from between the self-propelled conveyors 16,
The work W advances to the position of the cutting rod 24.

Thereafter, when processing of the preceding work W is completed, the cutting rod 24 is retracted by the compression movement of the cylinder unit 25, and the work W is transported to the position of the positioning pin 29.
When the workpiece W stops at the position of the positioning pin 29,
The work transfer rod 15 is lowered by the operation of the cylinder unit 14 and engages with the work W from above, and then the shift support 3 is advanced by the extension movement of the cylinder unit 4 and the work W is moved along the slide plate 17 by the work transfer rod 15. To the turntable 52 of the positioning mechanism I.

Next, in the positioning mechanism I, the phase of the work W is determined based on the valve mounting hole. That is, the motor 55
As soon as the light receiving element 69 receives the light emitted from the light emitting element 68 through the valve hole W2 of the work W on the turntable 52 on the turntable 52, the motor 55 is stopped to stop the rotation of the work W, and the cylinder unit 60 is stopped. Is operated to engage the positioning pins 62 provided on the plate 61 of the guide rod 59 with the stud bolt insertion holes W1 of the work W from below, thereby completing the positioning (phase-out). Then, when the positioning is completed, the compression movement is performed on the cylinder unit 65, and the support plate 64 is rotated downward so as not to interfere when the work W is carried into the press machine.

Therefore, in order to adjust the positions of the light emitting element 68 and the light receiving element 69 according to the model change, first, the vertical direction is the cylinder unit.
Activate 65 to swing the sensor support arm 67 via the support plate 64 and adjust it in the horizontal direction.Push the insertion / removal knob 70 against the spring 73 to pull out the insertion pin 71 from the insertion hole 72. Then, the sensor support arm 67 is moved along the guide bar 66, and the insertion pin 71 is fitted into the difference along hole 72 at a predetermined position for adjustment.

During this time, the shift support 3 is retracted to the original position in preparation for transporting the subsequent work. When the work W has been phased out, the cylinder unit 11 is subjected to a compression movement, the arms 12 and 12 are closed, and the work W whose phase has been worked out is gripped.

Thereafter, the work W whose lifting table 6 has been pulled up by the operation of the cylinder unit 7 is lifted from the turntable 53, the shift support 3 is advanced again, and the subsequent work W is transferred onto the turntable 53 and the arms 12, 12 are moved. The work W, which has been phased out, is carried into the press machine 80 of the work processing station S2, and the lifting table 6
To set the work on the lower mold 82, arm 12,
12 is opened, the shift support 3 is retracted, and the shape of the work W is corrected between the shift support 3 and the upper die 81.

When the shape correction is completed, the upper mold 81 is raised to open the mold. Then, when the arms 12 and 12 advance to carry the subsequent work into the press machine 80, the shape correction has already been completed, and the work W supported by the work support rail 86 has been moved to the tip of the arm 12. The ejectors 13, 13 are provided to extrude onto the shooter 91 of the work unloading station S3.

(Effects) As described above, according to the present invention, a hollow turntable on which a work is placed and rotated, and a pair of light emitting elements opposed to each other with at least a part of the work on the turntable vertically interposed therebetween And a photosensor comprising a light receiving element, and a plurality of sharp positioning pins provided at the center in the hollow portion of the turntable so as to be able to move up and down, and the photosensor is provided near the outer periphery of a work rotated by the turntable. When one of the holes is detected, the rotation of the work is stopped, and the positioning pins are raised to insert the positioning pins into the plurality of bolt holes of the work. A sharp positioning pin is inserted into the hole. For this reason, the positioning operation of the positioning pin into the bolt hole can be accurately and quickly performed even if there is a positional deviation between the bolt hole and the positioning pin due to the copying operation by inserting the sharp tip of the positioning pin. The displacement can be corrected, and the work can be accurately positioned in the circumferential direction.

Therefore, it is possible to correct the positional deviation of the work in a short time and perform highly accurate positioning.

Further, according to the present invention, after the positioning, the sensor support arm is moved so as to be separated outward and downward from the work by the operation of the cylinder unit, so that the work can be smoothly transferred to the next process in the positioned state. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view of a work processing apparatus to which a work positioning device according to the present invention is applied, FIG. 2 is an enlarged view of a work loading station, and FIG. 3 is a plan view of the work loading station. 4 is a view taken in the direction of arrows AA in FIG. 2, FIG. 5 is a sectional view of a work positioning mechanism, and FIG. 6 is a plan view of the work positioning mechanism. In the drawing, 3 is a shift support, 6 is a lifting table, 12 is an arm, 13 is an ejector, 15 is a work transfer rod, 17 is a slide plate, 28 is a temporary stop rod, 30 is a cutting rod, and 42 is a positioning pin. , 52 is a turntable, 62 is a positioning pin, 66 is a guide bar, 67 is a sensor support arm, 68 is a light emitting element, 69 is a light receiving element, 80 is a press machine, I is a positioning mechanism, K is a cutting mechanism, T is A transport mechanism, S1 is a work loading station, S2 is a work processing station, S3 is a work unloading station, and W is a work.

Continuation of the front page (72) Inventor Naofumi Nagata 1-10-1, Shinsayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. (56) References Japanese Utility Model Sho-63-29632 (JP, U) Japanese Patent Publication No. 52-11317 (JP, B2) Jiko 63-10185 (JP, Y2)

Claims (2)

(57) [Claims] 1. A work positioning device for detecting a phase of an annular work and positioning the work at a fixed position, comprising: a hollow turntable on which the work is placed and rotated; and at least a part of the work on the turntable. A photosensor comprising a pair of light-emitting elements and a light-receiving element opposed to each other in the up-down direction, and a plurality of sharp positioning pins provided at the center in the hollow portion of the turntable so as to be able to move up and down; When one hole provided near the outer periphery of the rotating work is detected on the table, the rotation of the work is stopped, the positioning pin is raised, and the positioning pin is inserted into a plurality of bolt holes of the work. A work positioning device, characterized in that: 2. The work positioning device according to claim 1, wherein the sensor support arm on which the photosensor is mounted is movably disposed outside and below the work by the operation of a cylinder unit. .