JPH03259817A - Carriage positioning device - Google Patents

Abstract

PURPOSE:To dispense with the exchange of positioning device at the time of a change in kind of workpieces in a device for positioning a belt-carried workpiece on a processing position carrying belt by turning up both the carrying directional end parts of the processing position carrying belt by workpiece detection signal toward both the sides of the workpiece. CONSTITUTION:When a workpiece W is supplied from a carrying exclusive belt 1a to a processing position carrying belt 42, a microswitch is operated to detect the supply. Belts 1a, 2a, 42 are stopped by this detection signal. Then, each side positioning device 43 situated on the sides of a processing position belt conveyor 3 is NC-controlled, and a movable plate 48 makes contact with and positions the workpiece W double side parts. Roller 20d, 21e are moved according to the size of the workpiece W, and both the sides of the belt 42 are turned up toward the workpiece W double side parts for positioning. This constitution enables the immediate accommodation to a change in kind of products.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a conveying and positioning device that positions a workpiece conveyed by a belt onto a conveying belt for a processing position.

(Conventional technology) For example, when mass producing relatively large products for use in automobiles, a belt conveyor with a large number of parallel belt pairs arranged in series is used, and the belt conveyor sequentially and intermittently transports workpieces to processing positions. At the same time, the workpiece is welded at this processing position.

Incidentally, before machining, the workpiece is positioned and supported at a machining position by a positioning means.

(Problem to be solved by the invention) However, since the shape and size of the workpiece differ depending on the type of product being manufactured, the positioning device must be replaced depending on the size and shape of the workpiece. However, it was time-consuming.

Furthermore, because there is a limit to the space in which the positioning device can be placed, there are also restrictions on the types of vehicles that can be produced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a transport positioning device that does not require replacement of the positioning device even if the shape and size of the workpiece change depending on the type of product being manufactured.

(Means for Solving the Problems) In order to achieve this object, the present invention provides a processing position conveyor belt between conveyance belts arranged in series, and a processing position conveyor belt from the conveyor belt to the process position conveyor belt. In a conveyance positioning device, the conveyance positioning device is provided with workpiece detection means for detecting a conveyed workpiece and outputting a detection signal, and is provided such that the driving means for each of the belts can be stopped by the detection signal, and the driving means for each of the belts is actuated by the detection signal. and a belt end rotation means for bending and rotating both sides of the conveyance belt for the processing position in the conveyance direction toward the workpiece, and the belt end portion is bent and rotated by the belt end rotation means. The present invention is characterized in that the transport positioning device is provided with support members that support both sides of the belt.

(Function) According to such a configuration, when a workpiece is supplied from the conveyance belt onto the processing position conveyance belt, the workpiece detection means detects the workpiece and outputs a detection signal. This detection signal causes the drive means for each belt to stop, thereby stopping each belt.

Further, the belt end rotation means is actuated by the detection signal, and both ends of the processing position conveyor belt are rotated upward about the support member. As a result, the workpiece on the processing position conveyance belt is held between both ends of this belt.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a side view of a belt conveyor that conveys product workpieces.

As shown in FIG. 3, this belt conveyor has two belt conveyors 1. Belt conveyor 2, 2 dedicated to conveyance installed in
and a belt conveyor 3.3 for the processing position, which is arranged between the corresponding belt conveyor 1.2. In the figure, la,
Reference numeral 2a denotes a conveyance belt for the belt conveyors 1 and 2, which is rotationally driven by a drive motor (drive means) not shown.

In FIGS. 1 to 3, 4 is the base of the belt conveyor 2. Brackets 5, 5 and 6, 6 are fixed to corresponding corners of the base 4, respectively. At the free ends of these brackets 5 and 6, there is a support piece A that branches into two.
, B are provided respectively.

Furthermore, guide rails 7.7 are attached to the center of the base 4, extending from left to right in the figure and disposed in parallel at intervals in the width direction.

Sliders 8, 9 are mounted on each guide rail 7, 7 so as to be movable in the longitudinal direction (see FIGS. 1 to 6). A ball screw nut 10.11 is attached to the lower surface of the sliders 8, 9, and ball screws 12, 13 are screwed into the ball screw nut 10.11. This ball screw 12.13 is rotatably mounted on the base 4 via a bearing 14.15. Further, the ball screws 12 and 13 are rotationally controlled by linear shaft motors 16 and 17 on the base 4.

Further, struts 18.18 and 19.degree. 19 are planted and fixed on the sliders 8 and 9, and brackets 20.21 for mounting rollers are respectively attached to the upper ends of these struts 18.19. As shown in FIG.
The bracket 21 has opposing pieces 21a, 21
b and the continuous piece 21c form an H shape. and,
Rollers 20d, 20d and 20e, 20e facing each other are attached to the upper and lower ends of the opposing pieces 20a, 20b as support members, respectively, and the opposing pieces 21a, 21
There are rollers 21d, 21 facing each other at the upper and lower ends of b.
d, 21e, and 21e are respectively attached as supporting members.

Belt support devices 22 and 23 as belt end rotation means are attached to the brackets 5 and 6. As shown in FIG. 8, this belt support device 22, 23 includes a first cylinder 24 that is open at both ends, an end plate 25 that closes one end of this cylinder 24, and is fixed to and supports the cylinder 24. Swing shaft 2 rotatably attached to sides A and B
6, a bottomed cylindrical second cylinder 27 whose open end side is fitted into the first cylinder 24, a bearing 28 attached to the bottom of the cylinder 24, and a bearing 28 attached to the open end of the cylinder 27. a ball screw 30 screwed onto the ball screw nut 29 and rotatably held by the bearing 28; and a ball screw 30 fixed to the end plate 25 and connected to the ball screw 30 via a coupling C. It has a shaft motor 31 for expansion and contraction. Further, a pulley shaft 32 is attached to the outer end of the second cylinder 27, and a pulley 33 is rotatably attached to the pulley shaft 32.

A mounting base 34 is fixed to the support piece A, and the mounting base 3
A swing shaft motor 35 is fixed to the shaft motor 4, and a swing shaft 26 is interlocked with an output shaft 35a of the shaft motor 35 via a speed reducer 36.

Further, a motor mounting plate 37 is fixed to the pulley shaft 32 of the belt support device 22 as shown in FIG. 9, and a motor 38 with a reduction gear is fixed to the motor mounting plate 37.
Sprockets 39 and 40 are fixed to the output shaft 38a and the pulley 33 of the belt support device 32, respectively, and a chain 41 is hooked around the sprockets 39 and 40. In the figure, the processing position conveyor belt 42 is passed around the pulleys 33.degree. 33 of the belt support devices 22, 23 that correspond in the left and right direction. As a result, a pair of processing position conveyor belts 42.degree. 42 are provided parallel to each other with an interval left and right.

Step portions 42a, 42a extending in the longitudinal direction are provided on both side edges of the processing position conveyor belt 42. Then, the stepped portion 4 of the upper part of this processing position conveyor belt 42
Rollers 20d, 20d, 21 are on rollers 2a, 42a.
d and 21d are engaged, and the processing position conveyor belt 4
Step portions 42a of the lower part of 2, above 42a (step portion 42a
rollers 20e, 20e, 21e, 2
1e is engaged.

Further, side positioning devices 43, 43 are arranged on the sides of the central part of the processing position conveyors 42, 42.

As shown in FIG. 10, each side positioning device 43 includes a motor 44, a ball screw 45 that is rotationally driven by the motor 44, a slider 46 that is moved left and right by the ball screw 45, and a slider 46 that is moved left and right by the ball screw 45. 46 and a movable plate 48 for a work guide attached to the upper end of this support 47. In addition, 49.49 in FIG. 3 is a fixed plate for work guides arranged in series at intervals on the side of the belt conveyor, and a movable plate 48 is arranged between the fixed plate 1 and 49.49. ing.

Between the processing position conveyor belts 42 and 42, as shown in FIG.
A workpiece detection means, that is, a microswitch 50, is arranged to detect the workpiece W conveyed on the workpiece 2 and output a detection signal. Furthermore, the detection signal from this microswitch 50 causes the belt la to be adjusted.

A motor and a belt 42 (not shown), which are the driving means of 2a.
The driving of the motor 41, which is the driving means for the motor, is stopped.

Further, both ends of the processing position conveyance belt 42 in the conveyance direction, that is, the portions of the belt 42 from the rollers 20d and 21d to the ends are provided as workpiece holding sections so as to be bendable and rotatable upward. Furthermore, the motors 31 and 35 are operated by the detection signal from the microswitch 52 to rotate the work holding portion of the belt 42 upward. In addition, motor 16.17.31°35, 38.41
．． 44 uses an NC servo motor to perform NC control.

Next, the operation of the transport positioning device having such a configuration will be explained.

According to such a configuration, the workpiece W is transferred to the belt 1a exclusively for conveyance.
When the workpiece W is supplied onto the processing position conveyor belt 42, the microswitch 50 as a workpiece detection means detects the workpiece W and outputs a detection signal. This detection signal causes a drive means (motor) (not shown) for the belts la, 2a and a motor 41, which is a drive means for the belt 42, to stop, thereby stopping each belt la, 2a, 42.

After this, each motor 44 of each side positioning device 43 located on the side of the belt conveyors 3, 3 for the processing position is subjected to NC control, and the ball screw 45 is rotationally driven.
The movable plate 48 is brought into contact with the image side of the workpiece W. Furthermore, during this control, the work W is controlled to move to the side of the belt conveyor 3.3 for the processing position, and the work W is positioned laterally.

On the other hand, the detection signal of the microswitch 50 is
6.17 is NC controlled and the ball screw 12.1
3 is rotationally driven, the sliders 8 and 9 are driven forward and backward in the conveyance direction of the work W, and the roller 20d.

The positions of 20e, 21d, and 21e are controlled to move relative to the workpiece W. Moreover, by this control, the rollers 20d, 20e, 21d, and 21e are moved to positions corresponding to the front and rear ends of the workpiece W in the moving direction, depending on the size of the workpiece W.

After such positioning, the motor 31 of the belt support device 22, 23 is controlled to rotate, and the second cylinder 27 is advanced upward by the ball screw 30. At the same time, the motor 35 is controlled to rotate, and the second cylinder 27 is advanced upward by the ball screw 30. The cylinder 24°27 is rotated in the direction in which the cylinder 27 approaches the workpiece W. As a result, the work holding portions at both ends of the belt 42, that is, the portions of the belt 42 from the rollers 20d, 20e, and 21d, and 21e to the end,
1, 20e and 21d, 21e to bend and rotate upward. The control by these two motors 31, 35 is synchronously controlled so that the belt 42 does not loosen. As a result, the work holding portions at both ends of the conveyor belt 42 for the processing position are
is held from the image side in the direction of movement.

The bending positions of the work holding portions at both ends of the belt 42 can be easily changed by changing the positions of the rollers 20d, 20e and 21d, 21e depending on the size of the workpiece. As a result, even if the shape or size of the workpiece to be machined is changed, the workpiece can be held well without replacing the workpiece holding device.

(Effects of the Invention) As explained above, in the present invention, a processing position conveyor belt is provided between conveyor belts arranged in series, and a workpiece is conveyed from the conveyor belt to the processing position conveyor belt. A conveyance positioning device is provided with a workpiece detection means for detecting and outputting a detection signal, and is provided such that driving means for each of the belts can be stopped by the detection signal,
A belt end rotating means is provided which is operated by the detection signal to bend and rotate both ends of the processing position conveyor belt in the conveying direction toward the workpiece, and the belt end rotating means rotates the belt end. When the belt bends and rotates 2. Since the structure is equipped with support members that support both sides of the belt, there is no need to replace the positioning device even if the shape or size of the workpiece changes. becomes.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the transport positioning device according to the present invention. FIG. 2 is an explanatory diagram of the main part of FIG. 1. 3 is a plan view of FIG. 1 showing a state in which the belt end rotating means of FIG. 2 is inclined at a smaller angle than that of FIG. 2; FIG. 4 is a partial explanatory diagram of FIG. 3. FIG. 5 is a right side view of FIG. 4. FIG. 6 is a sectional view taken along the line Vl--Vl of FIG. 4. FIG. 7 is a sectional view showing the relationship between the processing position conveying belt and its support member. FIG. 8 is a sectional view of the belt end rotation means. FIG. 9 is an explanatory diagram showing the relationship between the processing position conveyance belt and the driving motor. FIG. 10 is an explanatory diagram of the side positioning device of FIG. 3. la, 2a...Transportation belts 20d, 20e, 21d, 21e-Rollers (supporting members) 22.23...Belt end rotation means 33...Pulley 38...Motor 42...Processing position belt for

Claims (1)

[Claims] (1) A processing position conveyor belt is provided between the conveyance belts arranged in series, and a workpiece detection means detects a workpiece being conveyed from the conveyance belt to the processing position conveyor belt and outputs a detection signal. in the conveyance positioning device, in which the driving means for each of the belts is provided so as to be able to be stopped by the detection signal, and is operated by the detection signal to move both ends of the conveyance belt for the processing position in the conveyance direction. A belt end rotating means for bending and rotating is provided on the work side, and support members are provided for supporting both sides of the belt when the belt end is bent and rotated by the belt end rotating means. transport positioning device.