JPS6246531Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a transfer device for conveying workpieces and the like.

<Prior art> There are two types of transfer devices: one uses a lift-and-carry to transfer the workpiece, and the other uses a slide carry to transfer the workpiece. The slide-carry method is mainly used, but the lift-and-carry method is used when the underside of the workpiece is covered with black crust, or when the underside must not be damaged.

By the way, when first machining a reference surface on a workpiece in a black-skinned state, and then changing the posture of the workpiece and machining a different surface, initially the workpiece can only be transported using the lift-and-carry method. After changing the posture, it may be possible to transport the workpiece using a slide carry method using the machined reference surface as the transport reference.

However, in the past, it was common to divide the transfer line when the conveyance methods were different, and according to this method, there were two types of transfer bars, a means for lifting one transfer bar, and a means for lifting the other transfer bar. This requires a means for raising and lowering the transporting claws and a means for transferring both transfer bars, resulting in a complicated structure and increased costs.

<Purpose of the invention> In view of the above-mentioned conventional problems, the present invention combines the method of transporting workpieces using a lift-and-carry and the method of transporting workpieces using a slide carrier. The present invention provides a transfer device that uses a drive source for raising and lowering the transfer claws of a transfer bar to perform a lift-and-carry type lifting operation, thereby simplifying the configuration and reducing costs.

<Structure of the invention> The invention comprises a slider that reciprocates at a constant pitch in the conveying direction, a support stand horizontally suspended across each processing station in conjunction with the slider, and a support stand that is connected to the slider so that it can only rotate. a transfer bar provided with a transport claw; a drive device for raising and lowering the claw fixed to the slider for raising and lowering the transport claw of the transfer bar; and a shaft support for vertical movement on the support base on an extension of the transfer bar. a plurality of conveyor tables, each of which is rotatably supported on the support table at a pivot position of each conveyor table, and which converts power from the pawl raising/lowering drive device into vertical movement of the conveyor table; The present invention relates to a transfer device equipped with a link.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

In Figure 1, A is lift and carry,
B is a slide rear. In the slide carrier B, a slider 2 is slidably guided by a pair of pilot bars 1 having an axis in the conveying direction.
This slider 2 is connected to a transfer bar 3 which is rotatably connected and provided with a conveying claw 4 for a workpiece W. The slider 2 is reciprocated in the transport direction at a constant pitch by a drive device (not shown).

One lift-and-carry A, as shown in FIGS. 1 and 2, has a support stand 5 which is horizontally supported by support rollers 9 across each processing station and is connected to the slider 2. It has a plurality of conveyance tables 6 which are pivotably supported on the extension line of the transfer bar 3 so as to be movable up and down. To explain the structure of this conveyance platform 6, a plurality of guide bushes 8 are fixedly installed in the vertical axis direction at required pitches on the support platform 5, and the rods 7 are guided to the guide bushes 8 so as to be slidable in the vertical direction. , the transport table 6 is fixed to the upper end of the rod 7. The length of the rod 7 is made to have a different length depending on the positioning lift amount corresponding to each processing station, if necessary.
Each of the conveyance tables 6 provided on the support stand 5 is configured to move up and down by the power of a pawl raising/lowering drive device that raises and lowering the conveying pawls 4 of the transfer bar 3 .

Therefore, the claw raising/lowering drive device will be explained with reference to FIG. 4. A claw raising/lowering cylinder 10 is attached to the slider in an axial direction perpendicular to the axis of the pilot bar 1.
is fixedly installed, and the first reciprocating rod 11 is connected to the piston rod of the cylinder 10 for raising and lowering the pawl.

Further, a second reciprocating rod 12 coaxially supported above the first retracting rod 11 is slidably supported by the slider 2, and is connected to the first retracting rod 11 by a transmission member 14. This second advance/retreat rod 12
has an engagement groove 15, which engages an engagement member 16 provided on the transfer bar 3, and the second
The advancing/retracting rod 12 is moved forward and backward, and the transfer lever 3 is rotated to raise and lower the conveyance claw at an angle of 90 degrees.

The operating mechanism of the conveying table 6, which is moved up and down by the claw raising and lowering drive device, is as follows: As shown in Figures 2 and 3, a connecting rod 18, an intermediate rod 19 and a support rod 20, which are connected in series to the support table 5, are provided so as to be axially movable about the axis in the conveying direction, and the rods 7 which axially support each conveying table 6 and the connecting rods 18 are linked by bell crank-shaped links 17 which are pivotally supported on the support table 5 so as to be rotatable.

On the other hand, as shown in FIG.
The first retractable rod 13 is slidably supported and connected to the first retractable rod 11 by a transmission member 14. An engagement hole 22 is provided in this third reciprocating rod 13, and one end of a bell crank-shaped lever 21 rotatably supported on the slider 2 is engaged with the engagement hole 22, and the other end is connected to the connection hole 22. It has a pin-coupled structure with a support rod 20 which is connected in series via a rod 18 and an intermediate rod 19.

Next, the operation of the device of the present invention will be explained.

The workpiece W is conveyed from right to left in FIGS. 1 and 2. That is, in the lift-and-carry A, the workpiece W placed on the conveyor table 6 is lifted by the raised position of the conveyor table 6, and is transferred by a predetermined pitch by the leftward movement of the support table 5, and is transported at the leftward end. As the platform 6 descends, the workpiece is transferred to a temporary cradle (not shown), etc., and the support platform 5
is returned to its original position at the right end.

On the other hand, the slide carry B is moved by the lift and carry A to position C in FIG. is raised to engage the workpiece W, and the transfer bar 3 is moved to the left to transfer a predetermined pitch, and at the leftward end, the transfer claw 4
It is returned to its original position at the right edge.

1 and 2 show the state in which the transfer bar 3 and the support base 5 have been returned to their original positions at the rightward end. In this state, the claw raising/lowering cylinder 10 is operated, and the transfer lever 3 is rotated by the second advance/retreat rod 12 and the engaging member 16 to raise the conveying claw 4 which has fallen horizontally to an upright direction. It is brought into engagement with the workpiece W that has been transferred by a predetermined pitch in the previous transfer process. Simultaneously with this raising operation of the transport claw 4, the third reciprocating rod 13 rotates the lever 21, and connects the connecting rod 1 via the support rod 20 and the intermediate rod 19.
8 is pivoted to the left in FIG. By moving the left axis of the connecting rod 18, the rod 7 is actuated upward via the link 17, and all the conveyance tables 6 are moved to the upper end, and the workpiece W placed on the workpiece temporary holder etc. lift up.

After that, by moving the slider 2 at the rightward end to the left, the workpiece W on the conveyor table 6 of the lift and carry A and the slide carrier B are removed.
The workpieces W engaged with the transfer claws 4 of the transfer bar 3 are simultaneously transferred at a predetermined pitch. Then, at the leftward movement end of the slider 2, the claw raising/lowering cylinder 10 is operated again, and the transfer claw 4 of the transfer bar 3 is horizontally moved, the transfer platform 6 is moved to the descending end, and the slider 2 is moved to the right. This is to return the transfer bar 3 and the support base 5 to their original positions at the right end.

<Effects> According to the present invention, the support stand on the lift-and-carry side and the transfer bar on the slide carry side are combined into one slider, and the vertical movement of the plurality of conveyance tables provided on the support stand is transferred to the transfer bar. Since this is carried out by the power of the drive device for raising and lowering the transport claws of the aber, the structure is very simple and costs can be reduced. In addition, the lift-and-carry type transfer bar does not have one long transfer bar, but has multiple small conveyance tables on a support base depending on the size of the workpiece.
Since these transport platforms are designed to be raised and lowered, the weight to be lifted can be reduced, the burden of operating force applied to the claw raising/lowering drive device can be reduced, and the pivot structure of the link can be simplified. There are advantages such as

[Brief explanation of the drawing]

Fig. 1 is a plan view of the device of the present invention, Fig. 2 is an enlarged cross-sectional view taken along the line of Fig. 1, Fig. 3 is a cross-sectional view taken along the line taken from Fig. 2, and Fig. 4 is an enlarged cross-sectional view taken along the line taken from Fig. 2. . A... Lift and carry, B... Slide carry, 1... Pilot bar, 2... Slider, 3... Transfer bar, 4... Transport claw, 5
...Support stand, 6...Transportation stand, 7...Rod, 10
... Cylinder for raising and lowering claws, 11 ... First advancing/retracting rod, 12... Second advancing/retracting rod, 13... Third advancing/retracting rod, 14... Transmission member, 16... Engaging member, 17... ...Link, 18...Connecting rod, 19...
Intermediate rod, 20...support rod, 21...lever.

Claims (1)

[Scope of utility model registration request] a slider that reciprocates at a constant pitch in the conveyance direction; a support stand interlocked with the slider and suspended horizontally across each processing station; a transfer bar that is rotatably connected to the slider and provided with a conveyance claw; a claw raising and lowering drive device fixed to the slider and raising and lowering the transport claws of the transfer bar; a plurality of transport tables movably guided to the support base on an extension of the transfer bar; and each of the transport bars. A transfer device comprising: a plurality of links rotatably supported on the support base at guide positions of the base and converting power from the pawl raising/lowering drive device into vertical movement of the conveyance base.