JPH09174345A - Jig device for positioning work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drive control a stepping motor or the like with a less device configuration by providing switching means for carrying out switching so as to connect any one of absolute encoders selected to control means according to a switching signal form the control means. SOLUTION: According to a switching signal from a controller 27 a switch 26 is switched to perform connection with any one of absolute encoders E1 , E2 , E3 ...En for example, E1 . Then, a signal of the absolute encoder E1 is input to the controller 2 and processed there and the position of a stepping motor M1 is detected. According thereto, the motor M1 is drive controlled through the drive signal from the controller 27. It is possible to dispense with a counter so that reduction in cost and space is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning jig device for positioning and fixing a work at a predetermined position in an assembly process or the like.

[0002]

2. Description of the Related Art As shown in FIG. 3, a positioning jig device for a work is, for example, an inner panel 2 of a door panel of an automobile.
It is applied to the positioning jigs 3 and 4 for positioning and the fixing jigs 5, 6 and 7 for fixing the inner panel 2 of the door panel at a predetermined position. FIG. 4 is a perspective view of a positioning jig 3 which is one of various positioning jigs for positioning the inner panel. As shown in the figure,
Base 10 fixed on the table surface of the positioning jig device
An elevating device 11 for vertically moving the elevating member 11a by a ball screw mechanism is provided upright. The ball screw mechanism is mounted on the base 10 and driven by a driving body 12 such as a stepping motor capable of performing a precise rotary indexing. The nut to be screwed moves up and down, and as the nut moves up and down, the lifting member 11a attached to the nut moves up and down.

A drive body 13 such as a servo motor or a stepping motor capable of performing precise rotary indexing is attached to the tip of the elevating member 11a, and the rotary shaft of the drive body 13 extends horizontally. One end of the first arm 15 is fixed with a key so that it can be rotated in the horizontal plane by driving the driving body 13. Also, the first arm 1
At the other end of 5, a driving body 16 such as a servo motor or a stepping motor capable of performing accurate rotary indexing is attached. The rotation shaft 16a of the driving body 16 is the first arm 1
5, the one end side of the second arm 17 is keyed and fixed to the tip end of the second arm 17, and the positioning pin 19 is erected on the other end side of the second arm 17 to drive the driving body 16. Thus, the second arm 17 can be rotated in the horizontal plane. Then, the first arm 15 described above,
The second arm 17, the lifting device 11, the driving bodies 12, 13,
16 and the like make up a moving means for moving the positioning pin 19 in the three-dimensional direction.

[0004]

In the workpiece positioning jig device as described above, as shown in FIG. 5, the rotary shafts of the motors 12, 13, ...
The encoders 21, 21, ... Are attached to detect the position of the motor, and output signals from the encoders 21 are input to the controller 23 via the counters 22 and processed. When positioning the positioning jig and the fixing jig, the position is fed back using the encoder 21, but one encoder is required for each axis, and the pulse counter 22 to be fed back is also used. You only need the number of encoders,
With this, the position is constantly monitored. Therefore, there is a problem that a large number of counters are required, a space is required for that, and the cost is high.

Further, as shown in FIG. 6, a multi-axis controller 23 is required to realize multi-axis control, and the number of control axes is also limited by the function of the controller.
It is about the axis. Therefore, when the number of control axes is 12 or more, a multi-axis controller with special specifications is required, and such a multi-axis controller is expensive and cannot flexibly cope with the increase or decrease in the number of control axes.

Therefore, the present invention is configured to enable driving control of a driving body such as a stepping motor with a small equipment configuration, and multi-axis control without using an expensive multi-axis controller. It is an object of the present invention to provide a work positioning jig device that solves the above problem.

[0007]

The present invention has been made in view of the above circumstances, and a plurality of steppings for driving a positioning fixing member for positioning and fixing a work in a predetermined position in a three-dimensional direction in an assembly process or the like. A motor and a plurality of absolute encoders that are connected to respective rotary shafts of the plurality of stepping motors and detect the position of the stepping motor, and drive the stepping motor based on respective detection signals from the plurality of absolute encoders. Control means for controlling, and switching for interposing between the plurality of absolute encoders and the control means, selecting one of the plurality of absolute encoders based on a switching signal from the control means, and switching to connect to the control means. And a workpiece positioning jig device comprising: It was. Further, a plurality of motors for driving a positioning fixing member for positioning and fixing a work at a predetermined position in a three-dimensional direction in an assembly process and the like, and being connected to respective rotary shafts of the plurality of motors, the position of the motor is detected. A plurality of encoders, a plurality of 1-axis control means that drive-controls the motors based on respective detection signals from the plurality of encoders, and a link cable that connects the plurality of 1-axis control means. A jig for locating a workpiece is provided which enables simultaneous control of multiple axes.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described with reference to the drawings.
Example 1 of a workpiece positioning jig device
I do. FIG. 1 shows a workpiece positioning jig device according to the present invention.
2 is a system block diagram of the first embodiment of the present invention, which is shown in FIG.
So that the stepping motor M₁, M_Two, M_Three, ... M _n
Each rotary axis has an absolute encoder E₁,
E_Two, E_Three, ... E_nAre connected, and Absolute Enco
E₁, E_Two, E_Three, ... E_nSwitch 26 is connected to
Have been. The encoder signal from the switch 26 is a multi-axis
It is input to the controller 27 and processed, and
The switching signal from the roller 27 is input to the switch 26.
In addition, the stepping motor M₁, M_Two, M_Three, ... M
_nIs connected to the controller 27.
The stepping motor M₁, M_Two, M
_Three, ... M_nIs designed to drive.

Since the present embodiment has the above-mentioned configuration, the switching device 26 causes the absolute encoders E ₁ , E ₂ , E ₃ ,
... any one connections as switching instead of E _n,
For example, when switched to connect the absolute encoder E _1, the signal of the absolute encoder E ₁ is processed is input to the controller 27, the position of the stepping motor M ₁ is detected, based thereon, the drive signal from the controller 27 The stepping motor M ₁ is drive-controlled.

At this time, since the encoder is an absolute type and can be counted in the controller, it is not necessary to provide counters as many as the number of encoders as in the conventional case, the counters can be omitted, and the cost can be reduced accordingly. The equipment space can be reduced.

Next, a second embodiment will be described with reference to FIG. The controller uniaxial connected stepping motor M ₁ via the driver, absolute encoder E ₁ to the rotary shaft of the stepping motor M ₁
Are connected, and the encoder signal from the absolute encoder E ₁ is input to the controller and processed.

Similarly, the controller has a driver,
A stepping motor M ₂ and an absolute encoder E ₂ are connected, a controller is connected to a driver, a stepping motor M ₃ and an absolute encoder E ₃ , and a controller n is connected to a driver n, a stepping motor M _n and an absolute encoder E.
_n is connected.

The controller and the controller are connected by a link cable, the controller and the controller are connected by a link cable, the controller and a controller (not shown) are connected by a link cable, and the controller n-1 and controller n (not shown) are linked. Connected with cable n-1. Therefore, by connecting a simple and inexpensive single-axis controller with a communication cable (link cable), multi-axis simultaneous control becomes possible, the controller becomes cheaper, the required number of axes can be arbitrarily selected, and the number of axes can be changed. Can be flexibly dealt with.

Although the stepping motor is used as the driving body in the above-mentioned second embodiment, it is needless to say that it is not limited to this and may be another type of motor such as a servo motor. Further, although the absolute encoder is used as the encoder in the second embodiment described above, the encoder is not limited to this, and other types of encoders may be used. Furthermore, although the workpiece positioning jig device according to the present invention is applied to the door panel of an automobile, it is needless to say that the invention is not limited to this.

[0015]

As described above, according to the first aspect of the present invention, since the switching means can be interposed between the plurality of absolute encoders and the control means, the number of encoders can be changed as in the conventional case. Since it is not necessary to provide a counter only, the counter can be omitted, and the cost and the device space can be reduced accordingly. According to the second aspect of the present invention, by connecting the simple and inexpensive 1-axis control means with the link cable, multi-axis simultaneous control becomes possible, the control means (controller) becomes inexpensive, and the required axis is provided. The number can be arbitrarily selected, and the number of axes can be flexibly changed.

[Brief description of the drawings]

FIG. 1 is a first drawing of a workpiece positioning jig device according to the present invention.
It is a system block diagram of an Example.

FIG. 2 is a second view of a workpiece positioning jig device according to the present invention.
It is a system block diagram of an Example.

FIG. 3 is a perspective view showing a state in which an inner panel is positioned and fixed by a work positioning jig device.

FIG. 4 is a perspective view of a positioning jig that constitutes a workpiece positioning jig device.

FIG. 5 is a system block diagram in which one encoder and one counter are provided on one axis of a conventional workpiece positioning jig device.

FIG. 6 is a system block diagram of a conventional workpiece positioning jig device.

[Explanation of symbols]

2 Inner panel of door panel 3,4 Positioning jig 5,6,7 Fixing jig 10 Base 11 Lifting device 12,13,16 Driver (motor) 15 First arm 17 Second arm 19 Positioning pin 21 encoder 22 counter 23 controller 26 switch 27 controller _{M 1, M 2, M 3} , ... M n stepping motors _{E 1, E 2, E 3} , ... E n absolute encoder

Claims (2)

[Claims] 1. A plurality of stepping motors for driving a positioning fixing member for positioning and fixing a work in a predetermined position in a three-dimensional direction in an assembly process and the like, and the stepping motors connected to respective rotary shafts of the stepping motors. A plurality of absolute encoders for detecting the position of the motor, and a control means for driving and controlling the stepping motor based on the respective detection signals from the plurality of absolute encoders; and a plurality of absolute encoders between the plurality of absolute encoders and the control means. A workpiece positioning jig device comprising: an intervening switching unit that selects one of a plurality of absolute encoders based on a switching signal from the control unit and switches the connection to the control unit. 2. A plurality of motors for driving a positioning fixing member for positioning and fixing a work in a predetermined position in a three-dimensional direction in an assembly process and the like, and a plurality of motors connected to respective rotary shafts of the plurality of motors. A plurality of encoders for detecting the motor, a plurality of 1-axis control means for driving and controlling the motors based on respective detection signals from the plurality of encoders, and a link cable connecting the plurality of 1-axis control means When,
And a workpiece positioning jig device, which is capable of simultaneously controlling multiple axes.