JPS6327886Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a conveyance device configured to temporarily position a workpiece such as a wire material for processing during transportation, and to further convey the workpiece after processing.

For example, the frame that forms the backbone of an automobile seat is manufactured by bending a linear steel material. Such a linear steel material (hereinafter referred to as a workpiece) is conveyed by sliding it on a predetermined guide, and is processed along the way. In the case of once positioning, conventionally a receiver having a V-shaped groove is provided in the middle of the conveyance path, and the workpiece is dropped into the receiver to be positioned and held. However, in order to place the workpiece on the guide member again after processing, the operator must either lift the workpiece onto the guide member or raise the workpiece or receiver using an appropriate actuator such as an air cylinder. If a worker were to transfer the workpiece, not only would it place a heavy burden on the worker, but the entire manufacturing process could not be automated.In contrast, if an actuator such as an air cylinder were to be used, the above-mentioned problems would arise. Although this problem does not occur, since two drive mechanisms are required, one for transporting the workpiece and the other for transporting the workpiece from the receiver to the guide member, the equipment becomes complicated, and especially When consolidating equipment, problems arise, such as difficulty in incorporating new equipment into existing equipment.

This idea was made in view of the above circumstances, and it is possible to position and clamp the workpiece using the movement for transporting the workpiece, and therefore it is possible to use the movement for transporting the workpiece. The purpose of this is to provide a transport device that can simplify the device because it does not require a new drive mechanism other than the drive mechanism of the transport arm. A traveling platform provided with a positioning arm is provided so as to reciprocate in parallel with the guide member, and a stopper member is provided that positions the workpiece by abutting it at a predetermined location in the middle of the guide member, the tip of which guides the workpiece. The guide member is provided so as to protrude and retract from the upper surface of the member, and the workpiece on the guide member is moved forward by a positioning arm as the traveling table advances, and by a cam member provided on the traveling table. The stopper member is operated to make its tip protrude above the upper surface of the guide member, and the stopper member and the positioning arm position and fix the workpiece, and in the meantime, the conveyance arm moves the preceding workpiece. The workpiece is pushed forward, and as the carriage is moved backward, the transfer arm contacts the positioned workpiece and rotates so that its tip descends below the guide member, thereby transporting the workpiece. The main feature is that the carriage is configured to move backward without moving the workpiece backward.

An embodiment of this invention will be described below with reference to the attached drawings. FIG. 1 is a schematic front view showing an embodiment of this invention, in which a workpiece (hereinafter referred to as a work) W is placed and A pair of guide members 1 for guiding are arranged approximately horizontally, and the guide members 1
A stopper member 2 is arranged at a predetermined intermediate location,
Further, a traveling platform 5 is disposed below the guide member 1 and is reciprocated along the machine frame 7 by an air cylinder 3.

The stopper member 2 has a bent shape as shown in FIG. 1, and is rotatably attached to a bracket 6 attached to the machine frame 4 at its bent portion, and a driven member such as a roller is attached to the lower end of the bracket 6. At the same time, a tension spring 8 for rotating the stopper member 2 in the counterclockwise direction is arranged between the upper part of the pivot point of the stopper member 2 and the machine frame 4. Part 2
is normally held by a tension spring 8 so that its tip is lowered below the guide member 1.

Further, a transporting arm 9 is rotatably attached to the front end of the traveling platform 5, and a positioning arm 10 is rotatably attached to the rear end of the traveling platform 5. The center of gravity of arm 9 is on the right side of the rotation center in Fig. 1, and the arm 9 is always in the first position.
A force is applied to rotate it clockwise as shown in the figure.
Further, a stopper piece 11 is provided on the left side of the lower end of the transfer arm 9 to prevent the rotation in the clockwise direction.
1 so that the tip thereof is held in a state slightly protruding upward from the upper surface of the guide member 1. Further, like the transport arm 9, the positioning arm 10 has its center of gravity on the right side of the rotation center in FIG.
A pin 13 pushed toward the positioning arm 10 by a spring 12 is provided on the lower left side of the positioning arm 10 to prevent the positioning arm 10 from rotating clockwise.
Therefore, only when a force greater than the elastic force of the spring 12 is applied to the tip of the positioning arm 10 to rotate it clockwise, the positioning arm 10 will rotate clockwise. The positioning arm 10 rotates slightly, and the tip of the positioning arm 10 normally projects slightly above the upper surface of the guide member 1.

Furthermore, a cam member 14 is provided at the intermediate portion of the traveling base 5, and this cam member 14 is located at a position corresponding to the follower 7, with its tip end facing toward the rear side of the traveling base 5. It is a slope that slopes upward toward the stopper member 2.
The cam member 14 pushes up the follower 7 as the traveling platform 5 moves forward, rotating clockwise in FIG. ing.

Next, the operation of the device as described above will be explained. FIG. 1 shows a state in which the traveling platform 5 has been sufficiently retreated. In this state, the stopper member 2 is pulled by the tension spring 8 and rotates counterclockwise, so that its tip is directed downward from the upper surface of the guide member 1. The conveying arm 9 and the positioning arm 10 are in the upright state shown in FIG. 1 as the lower left side of each abuts against the stopper piece 11 and the pin 13, and the tip of each arm is in the upright state as shown in FIG. protrudes slightly upward from the upper surface of the guide member 1. When the traveling platform 5 is advanced from this state by the air cylinder 3, the preceding workpiece W is pushed by the transfer arm 9 and advances on the guide member 1, and the following workpiece W is moved forward by the positioning arm 10. The guide member 1 is moved by being pushed by the guide member 1. When the traveling platform 5 advances to near the front limit position, the cam member 14 begins to contact the follower 7 of the stopper member 2, so the stopper member 2 gradually rotates clockwise against the tensile force of the tension spring 8. Finally, as shown in FIG. 2, the tip of the stopper member 2 slightly protrudes from the upper surface of the guide member 1. As a result, the work W pushed forward by the positioning arm 10 comes into contact with the tip of the stopper member 2, and is held and fixed by the stopper member 2 and the positioning arm 10, thereby being positioned. In this case, even if the traveling platform 5 stops slightly forward of the normal front limit position due to variations in the stroke of the air cylinder 3, the positioning arm 10 is spring-loaded by the force applied to its tip. 12 is rotated slightly clockwise while compressing the positioning arm 12, so that excessive force is not applied to the positioning arm 10, the stopper member 2, etc. and this will not damage them. In other words, there will be no variation in the stopping position of the traveling platform 5. can be absorbed by the spring 12.

After positioning the workpiece W as described above and performing appropriate processing such as pressing on the workpiece W in this state, when the traveling platform 5 is moved backward, the cam member 14 is disengaged from the follower 7 and the stopper member is removed. 2
is pulled by the tension spring 8 and rotated counterclockwise, its tip descends downward from the upper surface of the guide member 1, and the transfer arm 9 is left on the guide member 1 after the processing is completed. Although it contacts the workpiece W, since the transporting arm 9 can freely rotate counterclockwise, the transporting arm 9 contacts the workpiece W during its retreat and is pushed by the workpiece W, as shown in FIG. As shown in FIG. 2, the transfer arm 9 rotates counterclockwise, and as a result, its tip falls below the upper surface of the guide member 1, so that the transfer arm 9 passes below the work W without pulling it back. become. When the transport arm 9 moves backward from the position where the workpiece W is located, the transport arm 9 automatically returns to the upright state because its own weight acts to rotate the transport arm 9 clockwise. .

Further, when the subsequent workpiece W is already placed on the guide member 1, the positioning arm 10 rotates counterclockwise in the same way as the transport arm 9,
Since the workpiece W passes below and then returns to the upright state, the processed workpiece W is located in front of the transport arm 9, and the unprocessed workpiece W is located in front of the positioning arm 10. become.

Therefore, when the traveling table 5 is moved forward again, the processed work W is pushed forward by the transfer arm 9, and the unprocessed work W is moved forward by the positioning arm 1.
Pushed by 0 to move forward. In this case, when the finished workpiece W passes through the location where the stopper member 2 is placed, the stopper member 2 is still located below the guide member 1 as shown in FIG. The workpiece W advances without interfering with the stopper member 2, and only when the unprocessed workpiece W approaches, the stopper member 2 rises as described above, and as a result, the unprocessed workpiece W is positioned in the same manner as described above. .

That is, in the above device, the unprocessed workpiece W
The conveyance and positioning of the workpiece W and the conveyance of the processed workpiece W can be performed by reciprocating the carriage 5.

As is clear from the above explanation, according to the conveyance device of this invention, the conveyance arm is rotatably attached to the front end of the carriage that reciprocates along the guide member, and the positioning arm is rotatably attached to the rear end. Furthermore, a cam member is provided in the middle of the traveling platform, and as the traveling platform moves forward, the transfer arm pushes the preceding workpiece on the guide member and moves it, and then the cam member moves the workpiece to the stopper member. The tip of the workpiece is moved to protrude onto the guide member, and the positioning arm pushes the subsequent workpiece so that it comes into contact with the stopper member, thereby positioning the workpiece. Also, when reversing the carriage, the transport Since the work arm is configured to pass under the work by contacting and rotating the work on the guide member, the work can be not only transported but also positioned by the reciprocating motion of the traveling base. Therefore, according to this invention, since no special drive mechanism is required other than the drive mechanism for reciprocating the traveling platform, the configuration of the entire device can be simplified, and the equipment cost can be reduced accordingly. In addition, since there are few drive sources, sequence control such as interlocking with other units and equipment and individual operation is easy. In addition, the time lag of sequence control is shortened, so operation is simple. Along with this, cycle time can be shortened, and furthermore, workpiece transport and positioning can be automated.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing an embodiment of this invention, and FIGS. 2 and 3 are schematic front views showing the operating process. 1... Guide member, 2... Stopper member, 5
...Traveling platform, 9...Transporting arm, 10...Positioning arm, 14...Cam member, W...Workpiece.

Claims (1)

[Scope of utility model registration request] a guide member that guides the workpiece; a positioning member that is disposed so as to be able to protrude and retract from the upper surface of the guide member so as to bring the workpiece into contact with the workpiece and stop the workpiece; and a traveling platform that reciprocates in parallel with the guide member. a cam member provided on the traveling platform to push up the positioning member and cause its tip to protrude above the upper surface of the guide member; a positioning arm provided on the traveling base so as to press against it; and a positioning arm of the traveling base such that as the traveling base is moved backward, the tip portion comes into contact with the workpiece on the guide member and descends from the guide member. 1. A transport device with a positioning mechanism, comprising a transport arm rotatably attached to a predetermined location in front of the arm.