JPH0155944B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a conveying device that conveys a workpiece by a lift-and-carry method.

<Prior Art> A lift-and-carry type conveyance device requires an elevating device that moves the conveyance bar up and down, and a transfer cylinder that moves the conveyance bar forward and backward in the conveyance direction.

By the way, if a transfer cylinder is swingably supported on a fixed part and one end of this transfer cylinder is connected to one end of a transfer bar, the overall length of the transfer device becomes longer, and it becomes necessary to install the transfer device in a location other than the processing station. Since it needed to be installed, there was a problem of increasing the size.

If one end of the transfer bar is connected to the middle of the transfer bar, the overall length of the transfer device will be shortened, but it will require a large space in the width direction or vertical direction so that the transfer bar can swing, making it difficult to integrate it into the processing station. Nakatsuta.

In addition, since one end of the transfer cylinder draws an arc due to the vertical movement of the transfer bar, there is a risk that the transfer bar may move in the longitudinal direction and the pin hole of the workpiece may not smoothly fit into the positioning pin provided on the processing station. It was hot.

<Objective of the Invention> An object of the present invention is to provide a transfer cylinder on an elevating frame that moves up and down, and to allow the transfer cylinder to guide a transfer bar, thereby making it possible to incorporate a transfer device into a processing station jig. This solves the problems of the conventional technology described above.

<Structure of the Invention> The characteristic structure of the present invention is that an elevating frame is connected to the upper part of an elevating rod that moves up and down, and a pair of transfer cylinders are provided at both ends of the elevating frame.
Both ends of the piston are fitted into the pair of transfer cylinders so as to be movable in the longitudinal direction of the lifting frame, and a conveyor bar is guided on the outer guide surface of each transfer cylinder so as to be movable in parallel to the moving direction of the piston. This transfer bar is connected to the piston via a connecting pin between two transfer cylinders.

<Examples> Examples of the present invention will be described below based on the drawings.
Reference numeral 10 denotes an elevating frame, which passes through a jig 11 of the processing station and is supported by an elevating actuator 12.

In the lifting actuator 12, a lifting rod 14 is fitted into a support block 13 so as to be movable up and down, a pinion 15 is engaged with a rack provided on the lifting rod 14, and a rack shaft 16 is engaged with the pinion 15. It has a structure in which the shaft 16 is connected to a piston rod of an elevating cylinder elevating drive device 17. Reference numeral 18 denotes a connecting shaft that connects the rack shafts 16 of the plurality of lifting actuating devices 12.

In the present invention, transfer cylinders 19 are fixed to both ends of the lifting frame 10 with their axes directed in the transport direction A of the workpiece W, and a shaft piston 22 can be moved forward and backward across both transfer cylinders 19. Insert. And both transfer cylinders 1
A conveyor bar 20 is attached to the outer guide surfaces 19a and 19b of 9.
is slidably guided and connected to the shaft piston 22 by a connecting pin 23. Reference numeral 21 indicates pallets arranged on the conveyor bar 20 at required intervals.

As shown in FIG. 3, the upper surface of the conveyor bar 20 is formed into a chevron-shaped inclined surface to prevent chips from accumulating.

Since the present invention has the above-described configuration, the workpiece W on the jig 11 is moved to the conveyor bar 2 by raising the lifting frame 10 using the lifting actuator 12.
0 and lift it up by supporting it on the pallet 21 above. Thereafter, by moving the axial piston 22 forward by one transfer cylinder 19, the movement is transferred to the transfer bar 2 via the connecting pin 23.
0, and the transfer bar 20 moves forward using the outer guide surfaces 19a and 19b of the transfer cylinder 19 as a guide. The lifting frame 10 is moved downward at the forward movement end of the transfer bar 20 to transfer the work W on the pallet 21 onto the jig 11 of the processing station, and then the shaft piston 22 is moved back by the other transfer cylinder 19. It operates and transfer bar 2
The transport cycle is completed by returning 0 to its original position. Since the lifting frame 10 lowers straightly without moving in the longitudinal direction, the workpiece W is attached to the positioning pin provided on the processing station.
The pin hole allows for smooth insertion.

In the above embodiment, one transfer cylinder 19 is operated forward and the other transfer cylinder 19 is operated backward, but one transfer cylinder 19 is fitted with a piston that moves forward and backward, and this piston It is also possible to connect an elongated rod to the rod and use the other end of the rod as a bearing member with a simple guide cylinder.

<Effects of the Invention> As described above, according to the present invention, an elevating frame is connected to the upper part of an elevating rod that moves up and down, a pair of transfer cylinders are provided at both ends of the elevating frame, and a piston is attached to the pair of ramp cylinders. Both ends are fitted so that they can move forward and backward in the longitudinal direction of the lift frame, and a conveyor bar is guided on the outer guide surface of each transfer cylinder so as to be movable in parallel to the moving direction of the piston, and this conveyor bar is connected to the two transfer cylinders. Since the structure is connected to the piston via a connecting pin between the two, the overall length of the conveying device can be shortened, and the width direction or vertical direction can also be reduced, making it possible to incorporate the conveying device into the jig of the processing station. This has the effect of reducing the installation space on the floor. Furthermore, since the conveyance bar does not move in the longitudinal direction when the elevating frame is raised or lowered, it is possible to smoothly insert the pin holes of the workpiece into the positioning pins of the processing station.

Furthermore, by guiding the transfer bar to the guide surface on the outside of the transfer cylinder, the transfer cylinder can have the dual functions of driving and guiding the transfer bar, and a dedicated member for guiding the transfer bar is provided. The number of parts can be reduced compared to conventional products. Furthermore, by utilizing the space between the two transfer cylinders to connect the transfer bar and the piston, there is an effect that the transfer device can be made more compact.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of the device of the present invention, FIG. 2 is a cross-sectional view taken along line B--B in FIG. 1, and FIG. 3 is an enlarged cross-sectional view taken along line B--B in FIG. DESCRIPTION OF SYMBOLS 10... Elevating frame, 12... Elevating/lowering actuation device, 19... Transfer cylinder, 20... Transfer bar, 22... Shaft piston, 23... Connection pin.

Claims (1)

[Claims] 1. A support block is provided with a lifting drive device that guides a plurality of lifting rods so as to be able to rise and fall, moves the lifting rods up and down, and connects an lifting frame to the upper part of the plurality of lifting rods. A cylinder is provided, and both ends of the piston are fitted into the pair of transfer cylinders so that they can move forward and backward in the longitudinal direction of the lifting frame, and a conveyor bar can be moved on the outer guide surface of each transfer cylinder in parallel to the moving direction of the piston. A conveying device characterized in that the conveying bar is connected to the piston via a connecting pin between two transfer cylinders.