JPH05178457A - Work positioning correcting device for work conveyance line - Google Patents

Abstract

(57) [Summary] [Purpose] When transporting multiple types of workpieces of similar shape, without newly setting a special transport standard for the workpieces,
Moreover, the work can be positioned at a fixed position and posture by using a device having a simple structure. A positioning device 20 having a holding member that engages with an existing shaft hole 10a of the work 10 is provided, and a pressing member 31 that presses one side surface of the work 10 and a stopper member 41 that abuts the other side surface of the work 10. Attitude determining device 3 having
0 is set. The holding member is engaged with the shaft hole 10a from below to center the work 10 rotatably at the reference position. The one side surface of the work 10 is pressed by the pressing member 31,
Stopper member 41 that can be selectively moved to a plurality of stop positions
Thus, the rotation of the work 10 is stopped. A plurality of types of workpieces 10 and 10 'having substantially similar shapes are always positioned at a fixed position and posture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning correction device for positioning a work at a fixed position and posture in an automatic carrying line for carrying a plurality of types of works having substantially similar shapes.

[0002]

2. Description of the Related Art Conventionally, an automatic transfer line is often used to transfer a relatively large and heavy work such as a component of various machines between manufacturing processes. In such a transfer line, after the work is positioned and held, it is necessary to reposition the work at a predetermined position and posture to be supplied to the transfer device. In general, when always carrying works of the same type, the carrying line is often set in advance to a dedicated specification corresponding to the works. However, there are multiple types of workpieces of similar shape corresponding to the size of the machine, and when transporting each of these workpieces, a certain transport reference, such as a reference hole or reference groove, is provided on the work. The work was positioned by this.

[0003]

As described above, conventionally, when conveying a plurality of types of workpieces having substantially similar shapes, a special conveyance standard such as a common reference hole or reference groove that matches the standard of the conveyance device is used. Since I was newly established in the work,
There is a problem that a processing step and a processing device for setting a transfer reference which is completely unnecessary as an added value of the work itself before the transfer of the work are required. In addition, in a work whose appearance shape itself becomes a product value, a step of removing or repairing the above-mentioned transfer reference is also required after the processing step for making a product is completed, and in order to transfer a plurality of works, Furthermore, new equipment is required. Further, in order to supply a plurality of types of workpieces having substantially similar shapes to the transfer device at predetermined positions and postures using such reference holes and reference grooves, a workpiece reference alignment mechanism and a predetermined position and posture are provided. There is a problem that an extremely complicated positioning device such as a mechanism for repositioning is required.

Therefore, according to the present invention, when a plurality of types of workpieces having substantially similar shapes are transported, the workpieces can be moved to a fixed position and posture by a device having a simple structure without newly providing a special transportation reference for the workpieces. It is an object of the present invention to provide a work positioning correction device for a work transfer line that enables positioning.

[0005]

In order to achieve the above-mentioned object, the present invention is a work position correcting device in a work transfer line for transferring a plurality of kinds of substantially similar works having existing engaged holes. And includes a rotatable holding member that engages with the engaged hole of the work, and drive means that raises and lowers the holding member and stops it at an arbitrary position. A positioning device for centering the work by engaging the hole from below, a pressing member for pressing the one side surface of the work, a drive means for moving the pressing member, and abutting the other side surface of the work. The stopper member and driving means for selectively moving the stopper member to a plurality of stop positions are used to press one side surface of the work by the pressing member. Of the workpiece is determined by rotating the workpiece around the engaged hole and stopping the rotation of the workpiece by the stopper member selectively moved to the plurality of stop positions. A posture determining device for performing the operation.

[0006]

According to the present invention constructed as described above, the work is centered at a predetermined reference position by engaging the holding member of the positioning device with the engaged hole of the work. The one-point support of the work by the holding member allows the work to rotate about the engaged hole. When one side surface of the work is pressed by the pressing member of the attitude determining device, the work is rotated around the engaged hole. The rotation of the work is stopped by the stopper member, and the work is determined to have a predetermined posture. The holding member centers the work with the engaged hole as a reference, and the stopper member that can be selectively moved to a plurality of stop positions stops the rotation of the work. Can be positioned at any position and posture.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The work shown in this embodiment is a component of a construction machine and has a length of several meters. There are a plurality of types of works corresponding to the size of the machine, and these works are substantially similar to each other.

As shown in FIGS. 1 and 2, a pallet 2 having a work 10 mounted thereon is provided by a work automatic transfer line 1.
Is conveyed in the direction of arrow a by the roller conveyor 3. A pallet 2 is fixed by a pallet fixing device (not shown) at a predetermined position on the transfer line 1, the work 10 is centered on the pallet 2 by a positioning device 20 and a posture determining device 30 is used. The posture is determined.

First, the positioning device 20 uses the shaft hole 10a of the work 10 to center the work 10. The shaft hole 10a is an existing through hole and is used as an engaged hole for positioning reference. The work 10 is mounted on the pallet 2 so that its shaft hole 10a is vertical.

As shown in FIG. 2, the positioning device 20 includes
A holding member 21 that engages with the shaft hole 10a of the work 10 and a driving unit that raises and lowers the holding member 21 to stop it at an arbitrary position.

The holding member 21 has a conical shape and is rotatably attached to the upper end of the moving rod 22. The moving rod 22 is moved up and down by the cylindrical guide 23 (arrows b and b ').
The movable rod 22 is supported so as to be vertically movable, and the operation rod 24a of the hydraulic cylinder 24 is connected to the lower end of the movable rod 22. An operating rod 25a of the linear position detector 25 is connected to the lower end of the moving rod 22.

The drive control system of the positioning device 20 has a control unit 26. The control unit 26 compares the stop position of the holding member 21 preset corresponding to the work 10 with the position information of the holding member 21 fed back by the linear position detector 25, and controls the solenoid valve 27. By this, the hydraulic pressure supply to the hydraulic cylinder 24 is controlled, and the holding member 21 is accurately stopped at an arbitrary position in the vertical direction.

Positioning device 20 constructed as described above
According to the above, the operation of the hydraulic cylinder 24 raises the moving rod 22, that is, the holding member 21, and the holding member 21 is engaged with the shaft hole 10a of the work 10 from below, whereby the work 10 is centered at a predetermined reference position. To be done. In this state, the work 10 is supported by the holding member 21 at a single point, and thus can rotate about the shaft hole 10a. Further, since the holding member 21 can be stopped at any position in the vertical direction, as shown by the alternate long and short dash line, the small work 1
The shaft hole 10a 'of 0'can be securely engaged. The engagement of the holding member 21 with the shaft holes 10a, 10a 'is for centering the workpieces 10, 10', so the holding members 21 are not always used for the workpieces 10, 1 '.
It is not necessary for 0'to be completely lifted from pallet 2.

Next, referring to FIGS. 1 and 2, the posture determining device 30 determines the posture of the work 10 centered by the positioning device 20 into a posture in which it can be automatically conveyed by using its outer shape.

The attitude determining device 30 includes a pressing member 31 for pressing one side surface of the work 10, a driving means for moving the pressing member 31, a stopper member 41 abutting against the other side surface of the work 10, and the stopper member 41. Drive means for selectively moving the motor to a plurality of stop positions.

First, as shown in FIG. 1, the pressing member 3 is
1 is fixed to the tip of a pair of moving rods 32, and these moving rods 32 are slidably supported by a support block 33 via a cylindrical guide 34. The hydraulic cylinder 35 is fixed to the support block 33, and the operating rod 3
5 a is connected to the pressing member 31. Therefore, by the operation of the hydraulic cylinder 35, the pressing member 31 is moved in the front-back direction (arrows c and c '). A roller 31a is rotatably attached to the tip of the pressing member 31.

Further, as shown in FIG. 2, the support block 3
A protruding piece 36 provided at the lower part of 3 is fixed to a rotary shaft 37, and an arm 38 fixed to the rotary shaft 37 is connected to an operating rod 39a of a hydraulic cylinder 39. By the operation of the hydraulic cylinder 39, the support block 33, that is, the pressing member 31 is rotated around the rotation shaft 37 in the directions of the arrows d and d ′, and is configured to be freely movable in and out of the movement range of the work 10. ..

Next, as shown in FIG. 3, the stopper member 41 includes a stopper protrusion 42 with which the other side surface of the workpiece 10 abuts, and a drive protrusion 43 to which the operating rod 46a of the hydraulic cylinder 46 is connected. It has a regulated protruding portion 44 related to a stopper regulating mechanism 50 described later, and is supported by a shaft 45 so as to be rotatable in the directions of arrows e and e ′. The stopper member 41 is moved between the position P and the position R by stopping the operation rod 46a of the hydraulic cylinder 46 at both ends of expansion and contraction. A roller 42a is rotatably attached to the tip of the stopper protrusion 42.

Further, as shown in FIGS. 3 and 4, the stopper regulation mechanism 50 includes a regulated projection 44 of the stopper member 41.
Is a contact mechanism, a drive plate 52 to which the operating rod 54a of the pneumatic cylinder 54 is connected, and a connecting plate 53 that connects the control plate 51 and the drive plate 52 to each other. Then, the pneumatic cylinder 54
The regulating plate 51 is rotated in the directions of the arrows f and f ′ via the drive plate 52 and the connecting plate 53, and the tip 51a of the regulating plate 51 has the regulated projection 44 of the stopper member 41.
It is configured so that it can freely move in and out of the moving range of. The drive source of the stopper regulating mechanism 50 may be a hydraulic cylinder, but in the embodiment, the pneumatic cylinder 54 is used for the purpose of cost reduction.

Attitude determining device 30 constructed as described above
According to this, as shown in FIG. 1, when the pressing member 31 is projected in the direction of arrow c by the operation of the hydraulic cylinder 35 and one side surface of the work 10 held by the holding member 21 is pressed, the work 10 is moved. It is rotated in the direction of arrow g around the shaft hole 10a. Since the holding member 21 is rotatable, the work 10 can be smoothly rotated.
Further, the roller 31a at the tip of the pressing member 31 is attached to the work 10
Since it rolls freely according to the surface shape of the workpiece 10,
Can be pressed smoothly.

Then, the other side surface of the work 10 comes into contact with the stopper projection 42 of the stopper member 41, whereby the rotation of the work 10 is stopped and the posture is determined. At this time, as shown by the solid line in FIG. 4, when the restriction plate 51 of the stopper restriction mechanism 50 is rotated in the arrow f direction, when the stopper member 41 is rotated in the arrow e direction in FIG. Since the protrusion 44 to be regulated contacts the tip 51a of the regulation plate 51, the stopper member 41 is stopped at the operating position Q shown by the solid line, and the large workpiece 10 can be stopped. Also, FIG.
As shown by the alternate long and short dash line, when the regulation plate 51 of the stopper regulation mechanism 50 is rotated in the direction of arrow f ', when the stopper member 41 is rotated in the direction of arrow e in FIG. Since the portion 44 does not come into contact with the tip 51a of the regulation plate 51, the stopper member 41 is rotated to the operating position R shown by the alternate long and short dash line, and the small work 10 'can be stopped.

After the posture of the work 10 or 10 'is determined, the stopper member 41 is rotated to the retracted position P indicated by the chain double-dashed line by the operation of the hydraulic cylinder 46, and the stopper projection 42 is moved. Or spaced apart from the 10 'surface. As a result, it is possible to prevent damage to the surface of the work 10 or 10 'due to the contact of the stopper protrusions 42 during the work transfer.

As described above, by the holding member 21 of the positioning device 20, the pressing member 31 of the attitude determining device 30, and the stopper member 41 that is selectively moved to a plurality of stop positions, the works 10, 10 'having substantially similar shapes are formed. These workpieces 10 and 10 'can be provided without newly providing a special conveyance standard.
Can always be positioned in a fixed position and posture.

Before and after determining the postures of the workpieces 10 and 10 ', as shown by a two-dot chain line in FIG.
By this operation, the support block 33, that is, the pressing member 31 is rotated in the direction of the arrow d ′ about the rotation shaft 37, and is moved to the retracted position out of the movement range of the works 10, 10 ′. As a result, it is possible to avoid the interference between the works 10, 10 'and the pressing member 31 when the works 10, 10' are conveyed.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various effective modifications and applications are possible based on the technical idea of the present invention. .. For example, in the embodiment, the plurality of stop positions of the stopper member are three positions, that is, two operation positions corresponding to large and small works and one retracted position, but the stop positions are further increased according to the type of work. It is possible to Further, in the embodiment, the pressing member of the attitude determining device is configured to be movable in and out of the movement range of the work, but it may be configured to retract the stopper member or both the pressing member and the stopper member. ..

[0026]

As described above, according to the present invention,
When transporting multiple types of workpieces that are similar in shape, the positioning device and posture determining device allow the existing engaged holes (for example, shaft holes) and external shapes of the workpieces to be used as they are, thus allowing the workpieces to be transported in a special manner. The work can be positioned at a fixed position and posture by a device having a simple structure without newly providing a reference. Therefore,
Since there is no need for a step and a device for processing a transfer standard on a work before transfer and a step and a device for removing or restoring the transfer standard of a work after transfer, the transfer efficiency is significantly improved and the equipment is significantly reduced. be able to. Moreover, according to the present invention, the work is centered rotatably by the holding member with respect to the engaged hole, and the rotation of the work by the pressing member is stopped by the stopper member movable to a plurality of stop positions. It is possible to always accurately position a plurality of types of workpieces having substantially similar shapes at a fixed position and posture.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire apparatus according to an embodiment of the present invention.

FIG. 2 is a side view taken along the line II-II of FIG.

FIG. 3 is a plan view showing a stopper member of the attitude determining device.

FIG. 4 is a side view taken along the line IV-IV in FIG.

[Explanation of symbols]

 1 Work Automatic Transfer Line 10, 10 'Work 10a, 10a' Shaft Hole (Engagement Hole) 20 Positioning Device 21 Holding Member 24 Hydraulic Cylinder 25 Linear Position Detector 26 Control Section 30 Positioning Device 31 Pressing Member 33 Support Block 35 Hydraulic cylinder 39 Hydraulic cylinder 41 Stopper member 42 Stopper projection 44 Restricted projection 46 Hydraulic cylinder 50 Stopper restriction mechanism 51 Restriction plate 54 Pneumatic cylinder

Claims (3)

[Claims] 1. A work positioning correction device in a work transfer line for transferring a plurality of types of works having substantially similar shapes having existing engaged holes, wherein the work positioning correction device engages with the engaged holes of the work and is rotatable. Positioning for centering the workpiece by holding the holding member and driving means for moving the holding member up and down to stop at an arbitrary position, by engaging the holding member with the engaged hole of the work from below. Apparatus, pressing member for pressing one side surface of the work, drive means for moving the pressing member, stopper member for abutting the other side surface of the work, and selectively moving the stopper member to a plurality of stop positions And drive means,
The pressing member presses one side surface of the work to rotate the work about the engaged hole, and the stopper member selectively moved to the plurality of stop positions moves the work. A work positioning correction device in a work transfer line, comprising a posture determining device that determines the posture of the work by stopping rotation. 2. A plurality of stop positions of the stopper member,
The work positioning correction apparatus for a work transfer line according to claim 1, comprising a plurality of operating positions that abut the surface of the work and a retracted position that is separated from the surface. 3. The work transfer line according to claim 1, wherein at least one of a pressing member and a stopper member of the posture determining device is configured to be movable in and out of a moving range of the work. Work positioning correction device.