JPH01295746A - Transfer device - Google Patents

Abstract

PURPOSE:To easily and surely perform positioning of a pallet and its conveyance to be synchronized with a transfer bar in its reciprocating motion by forming an adapted part to the pallet and a cam part in the transfer bar and providing a positioning member, stopped to and detached from the pallet in the cam part, in a stop position of the pallet. CONSTITUTION:When a transfer bar 4 is advanced, a fixedly provided adapted part 28 presses a pallet 30 to be moved. And providing in a stop position a positioning member 31, its cam follower 32 is inserted into a cone-shaped cam groove formed in the transfer bar 4. The positioning member 31 is stopped to a pallet groove 30a by a spring 36, and stopping advancing the transfer bar 4, the pallet 30 is positioned. Next the transfer bar 4 is turned, retracting the adapted part 28 to be turned, and the positioning member 31 is detached from the pallet 30. In the next time of advancing, the transfer bar 4 is reversely rotated returning the adapted part 28 to the original position.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to improvements in in-line transfer devices.

In conventional in-line transfer devices, pallet feeding, positioning, etc. are usually performed by mechanical or electrical sequence devices.

On the other hand, the invention disclosed in Japanese Patent Publication No. 50-36313 performs these operations in a synchronous state using one drive source, making sequence control unnecessary. However, the above-mentioned apparatus has disadvantages in that it has a complicated structure and requires a large installation space.

OBJECTS OF THE INVENTION An object of the present invention is to carry out conveyance and positioning of pallets with a simple configuration using a single drive source and camshaft, and to synchronize these operations in a precise and reliable manner.

Another object of the invention is to reduce the size of the drive part by obtaining a large stroke with a small movement on the drive side.

Solution to the Invention In view of the above object, the present invention provides a transfer device in which a transfer bar is given reciprocating motion by one drive source and pallets are sequentially conveyed from station to station by a unidirectional moving operation of the transfer bar. The par is provided with a contact part for the pallet and a cam part for the positioning member, and the contact part allows
While sequentially transporting pallets to each station,
The reciprocating movement of the transfer par causes the positioning member to operate in a synchronous manner via the cam portion, and the pallet after being transported can be fixed in a positioned state at a stopped position by this positioning member.

In addition, the present invention employs a cam mechanism and a double stroke mechanism in the process of converting the rotational motion of the drive source into reciprocating linear motion of the transfer par, thereby achieving the necessary stroke of the transfer par with a small movement of the drive source. We are trying to secure it.

Structure of the Invention FIGS. 1 to 3 show a transfer device 1 of the present invention.
It shows.

This transfer device 1 is assembled by a drive source 2, a motion conversion mechanism 3, a transfer par 4, and the like.

The drive source 2 is, for example, a motor, and its rotational force is
The speed is reduced by the reducer 5, and the camshaft 7 is moved through the clutch 6.
is transmitted to. The motion conversion mechanism 3 converts the rotational motion of the camshaft 7 into a swinging motion and a reciprocating linear motion and transmits the same to the transfer par 4. 8. Equipped with a cam 9 for generating reciprocating linear motion. These cams 8.9 are, for example, disc cams, and are in contact with the rollers 12.13 on the lower end sides of the cam followers 10, 11, respectively, at the cam contour portions on the outer periphery. One cam follower 10 is supported so as to be movable only in the vertical direction, and is supported by a slider 1 at the upper end.
The portion 4 fits into the groove 16 of the lever 15. The other cam follower 11 is swingably supported by a fulcrum shaft 17 at a fixed position, and a slider 18 at the tip
The groove 20 of the drive rod 19 is slidably fitted into the groove 20 of the drive rod 19. This lever 15 is connected to the spline 4 of the transfer par 4 at the spline cylinder 21.
It is movable in the axial direction with respect to a and is connected to transmit only rotation. Further, the drive loft 19 rotatably holds a pinion 23 at a shaft 22 at its tip. This nion 23 meshes with a fixed rack 24 on one side to form a double stroke mechanism;
and a rack 25 fixed to the bracket 26 on the other side.
are meshed with each other. The bracket 26 is connected to the transfer par 4 at the flange 27 in a manner that allows rotation of the transfer par 4 while transmitting only axial motion. These camshaft 7, cams 8.9, cam followers 10, 11, lever 15, bracket 20, etc. constitute a motion conversion mechanism.

Further, the transfer par 4 has a plurality of pallets 3.
A contact part 28 is provided for each feed pitch of 0, and a cam part 29 is provided near the contact part 28. According to this embodiment, the cam part 29 has a tapered elliptical cone and a cam part 29. It is formed as a combination of elliptical cylinders, and its outer peripheral portion contacts the ball 33 of the cam follower 32 in order to drive, for example, a pair of positioning members 31.

Although not shown, the cam follower 32 is held movable in the axial direction.

The pair of positioning members 31 are swingably supported by a fulcrum shaft 35 with respect to a bracket 34 in a fixed position, and a tension spring 36 between the two members is used in a direction in which the positioning portions at the tips sandwich the positioning groove portion of the pallet 30. The cam follower 32 is further connected to the cam follower 32 at the intermediate portion by a connecting pin 37.

Effects of the Invention The transfer device 1 sequentially performs necessary operations for each cycle based on the time chart shown in FIG.

During this one cycle, the rotation of the drive source 2 is reduced by the reducer 5 and transmitted to the camshaft 7 via the clutch 6. This causes the cam 8.9 to rotate, but first, the cam 9 causes the cam follower 11 to rotate on the fulcrum shaft 17.
In order to rotate around and move the binion 23 forward,
The rack 25 moves the transfer par 4 from the retracted position in the forward direction by an amount twice as much as the amount of advancement of the pinion 23. When this transfer par 4 starts moving,
Since the elliptical conical portion of the cam portion 29 hits the ball 33 and moves the cam follower 32 in the direction away from the transfer par 4, the pair of positioning members 31 moves away from the positioning groove 30a of the pallet 30 against the tension spring 36. direction and set the pallet 30 in a state where it can be fed and moved. At this time, since the contact part 28 is set in the raised state, the transfer par 4 hits the rear end of the pallet 30 at the contact part 28 during the forward movement process, conveys it in the feeding direction, and moves it forward. from one stop position to the next stop position and stop there. In this way, the transfer par 4 moves the positioning member 31 backward to the escape position immediately after moving forward, leaves the pallet 30 in a free state, and then sends the pallet 30 from the previous stop position to the next stop position by the abutting part 28. At the completion of this feeding, the cam 8 drives the cam follower 10, and the lever 1
5, the contact portion 28 in the upright state rotates about 120 degrees as shown in FIG. is set to At this time, the left and right balls 33
is in contact with the short axis direction of the elliptical column of the cam part 29, so the pair of positioning members 31 are pulled by the tension spring 36, and the positioning part at the upper end fits into the positioning groove 30a of the pallet 30, bringing it into the positioning state, and Fix it in the stop position. After this, the cam 9 and the cam follower 11 move the pinion 23 backward, so the transfer par 4
moves in the backward direction with the contact parts 28 facing down, and moves each contact part 28 to the rear of the pallet 30 to be sent next, passing under the pallet 30 that has been sent.

When this backward movement is completed, the cam 8 and the cam foyer 07-10 drive the lever 15 to rotate the transfer par 4 and bring the contact portion 28 into the upright state in preparation for the next feeding.

When this feeding is completed, a working time is set on each pallet 30, and necessary work is performed. When this work time is long, the clutch 6 is set in the disengaged state until it completes one cycle. However, when the working time is short, this clutch 6 is not disengaged. Therefore, in that case, the clutch 6
is unnecessary and can be omitted. If the working time is short, the cam 8.9 will rotate continuously.

Other Embodiments of the Invention In the above embodiment, the reciprocating movement of the transfer par 4 is configured by a double stroke mechanism (rack and binion), but this double stroke mechanism is not necessarily required, and other similar It is also possible to use a mechanism such as a pulley type double stroke mechanism or a quick return mechanism. Further, the timing of the feeding operation, positioning operation, etc. is not limited to the above embodiment, and can be set according to the content of the work. Further, the cam portion 29 is connected to the transfer par 4.
The positioning member 31 may be driven only by the rotational movement of the transfer member 4 or only by the reciprocating linear movement of the transfer par 4.

Effects of the Invention In the present invention, by the reciprocating movement of the transfer par,
A plurality of pallets are sequentially conveyed, and the pallets are positioned at a stop position by the cam portion of the transfer par and the positioning member driven by the cam portion, so that the conveyance and positioning operations of pallet 7) are mechanically reliable. Sync.

Moreover, since such synchronized operation can be achieved with a simple configuration in relation to the feeding operation of the transfer device, the structure does not become complicated. In addition, if the motion conversion mechanism is equipped with a double stroke mechanism, the motion on the drive side can be set smaller than the reciprocating stroke of the transfer par.
The drive device can be further downsized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the transfer device of the present invention, FIG. 2 is a vertical sectional view of the positioning portion, FIG. 3 is a side view of the cam portion, and FIG. 4 is a time chart of the operation. 1. Transfer device, 2. Drive source, 3. Motion conversion mechanism, 4. Transfer bar, 7. Cam shaft,
8.9...Cam, 19...Drive rod, 28...Abutting part, 29...Cam part, 30...Pallet, 31...Positioning member, 36...Tension spring. Patent applicant Sankyo Seiki Seisakusho Co., Ltd.
Mr. Kunio Kawa, Patent Attorney, Figure 2

Claims (2)

[Claims] (1) In a transfer device that reciprocates a transfer bar using a drive source and sequentially conveys pallets in one direction, the transfer bar is formed with a contact part and a cam part with the pallet, and the pallet stopping position is as described above. A transfer device comprising a positioning member that engages and disengages from the pallet by a cam portion, and the cam portion releases the positioning member when the transfer bar moves in the one direction. (2) The transfer device according to claim 1, wherein a double stroke mechanism is incorporated in the portion that transmits motion from the drive source to the transfer bar.