JPH0318436A - Transfer device - Google Patents

Abstract

PURPOSE:To efficiently enlarge a working bed by providing feed bars on the lower side of a clamp up/down unit to make a clamping/loosening motion and making a backward/forward motion of the feed bars with a feed unit. CONSTITUTION:A pair of bars 10 is provided in parallel along the transfer direction of a work. The work is clamped, elevated, forwarded, lowered, loosened and backed by them to be transferred. Then, the clamp up/down unit 18 is hung and supported by a hanging frame 19 provided on the upper part of the working bed. The feed bars 10 are provided on the lower side of this unit 18 to make the clamping/loosening motion. The backward/forward motion of the feed bars 10 are made by the feed unit 52 hung and supported by the hanging frame 19. Thus, a peripheral equipment can be set easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transfer device for transporting a workpiece. [Prior Art] A conventional transfer device transports a workpiece to be pressed. Two long feed bars are placed on both sides of a die for press working, for example a lower die and an upper die, and these bars clamp and transport the work from both sides. For example, as shown in Japanese Patent Application Laid-Open No. 59-33042, the transfer device is capable of moving a pair of parallel feed bars in the front-rear, lateral, and vertical directions, and clamps the workpiece → raises → moves forward → lowers → unclamps the workpiece. The series of operations of →retreat →clamping is repeated to transport the workpieces to the presses for successive processes. [Problems to be Solved by the Invention] However, in the transfer device in the prior art described above, the main body of the device is installed on the work floor, and the feed bar is provided above the main body of the device. For this reason, the main body of the equipment was located on the work floor below the feed bar, leaving no free space. For this reason, the work floor cannot be used widely, and peripheral equipment for presses and transfer equipment,
For example, it was necessary to install a conveyor or a workpiece loading machine.The present invention was made in view of the problems of the prior art described above.
The purpose is to provide a transfer device that can freely use the space below the feed bar to widen the work floor and make it easier to install peripheral equipment.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a pair of feed bars that are provided parallel to each other along the conveying direction of the work, and the feed bars clamp the work, raise it, move it forward, process it, and unload it. In the 1-transfer device that performs the transfer by clamping and retreating, a feed bar is provided below the clamp up/down unit that is suspended and supported by a suspension frame provided above the work floor. Clamping and unclamping operations are performed,
The feed bar is configured to be moved forward and backward by a feed unit suspended and supported by the suspension frame.

[Effect]

The clamp up/down unit and feed unit that make up the main body of the device are suspended and supported by a suspension frame installed above the work floor, so the feed bar installed below the clamp up/down unit is , the device itself does not exist. Therefore, there is free space below the feed bar, making it possible to use a wider working floor, making it easier to install peripheral equipment.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 7.

Fig. 2 is a bottom view showing the entire transfer device according to the embodiment of the present invention, Fig. 3 is a front view of Fig. 2, Fig. 4 is a side view of Fig. 2, and the construction drawing is the same as Fig. 2! -■ sectional view, FIG. 5 is a 1-1 cross-sectional view of FIG. 1, FIG. 6 is an enlarged view of the ■ section of FIG. 2, and FIG. 7 is a front view of FIG. As shown in FIG. 2, a pair of feed bars 10.10 are
They are provided parallel to each other along the conveyance direction of a workpiece (not shown) to be pressed. The feed bars 10 are generally located on both sides of a workpiece that is pressed by a die consisting of an upper die and a lower die, and serve to sequentially convey the workpiece to the press for the next process. That is, feed bar 10
A jig called a finger (not shown) is attached to the inside or lower side of the workpiece, and these fingers press the workpiece from both sides to clamp and transport the workpiece.

Then, clamp → raise → advance → lower → unclamp →
Conveyance is carried out by repeating a series of movements: retreat → clamp. As shown in FIGS. 2 and 3, the pair of feed bars 10 each include two front and rear guides 1 provided in the front and rear directions.
It is supported on top of 2.

At the same time as this front and rear guide 12 moves in the vertical and lateral directions, the feed bar IO slides on this front and rear guide 12 in the front and rear directions, so that the feed bar moves in three dimensions, that is, in the lateral, vertical, and front and rear directions. The movement is now possible. Front and rear guide 12 for feed bar 10
To slide along the slide gib 14 on the
As shown in FIG. 3, this is a feed pin 16 that vertically penetrates the round hole at the end of the feed bar 10, and the feed bar 10 can move up and down along the vertical direction of this feed pin 16. Next, with reference to FIG.

A hanging frame 19 is provided above the work floor structure 7. This suspension frame 19 may be installed directly on the ceiling of the work room, but it is also possible to provide support legs on the work floor far away from the transfer device, and use these support legs to install the suspension frame above the transfer device. Good too.

The front-rear guide 12 is fixed to the lower end of an up-down Rond 20 provided in the vertical direction. A plate 2l is mounted on the upper surface of the feed bar IO supported by the front and rear guides 12.
is fixed, and both ends in the width direction of this plate are the front and rear guides l.
It is engaged with the inside of 2 and supported in the vertical direction. This up-down rod 20 is held movably in the vertical direction with respect to a slide frame 22 present inside the housing of the clamp up-down unit 18, and has a rack gear 24 (see FIG. 5) formed on its surface. A pinion gear 26 is engaged with this rack gear 24. The pinion gear 26 is held by the slide frame 22. The slide frame 22 is attached so as to be slidable in the lateral direction with respect to two slide guides 30, 30 provided laterally inside the unit housing 28. A ball screw nut 3l is fixed to the slide frame 22 via a bracket. A feed screw 32 passes through this nut 31. This feed screw 32 has a male thread formed on its outer circumferential surface and is supported by a bearing portion fixed to the unit housing 28.
It is rotatably supported by the housing 28. A pair of bevel gears 34 are provided at the ends of the feed screw 32, and are connected to the shaft of a clamp motor 36 provided perpendicularly to the feed screw 32, that is, in the vertical direction. Further, a spline rond 38 is coaxially connected to the pinion gear 26.
penetrates. This spline rod 38 has a spline 40 formed on its surface so that it can slide laterally with respect to the pinion gear 26 and can transmit rotational force. This spline rond 38 is rotatably supported by a bearing part fixed to the unit housing 28, and is provided vertically via a pair of bevel gears 42 provided at the end. connected to the shaft of the up-down motor 44,
The slide guides 30, 30, feed screw 32, and spline rond 38 are provided horizontally and parallel to each other. The feed screw 32 and the spline rod 38 are covered with an elastic coil force bar 45 to protect the surfaces from dust. This coil forceper 45 has the function of preventing the lubricating oil in the gas case 46, 48 from leaking out through the feed screw 32 or the spline rod 38 and dripping.

Also, bevel gears 34 and 42 provided at the ends of the feed screw 32 or the spline rond 38 and both ronds 32
．． The support portions of the 38 unit housings 28 are housed together in a gear case 46, 48, and are filled with lubricating oil. The gear cases 46 and 48 serve as oil paths to prevent lubricating oil 50 from leaking out of the unit housing 28 (first @). The lubricating oil 50 accumulated at the bottom of the gear cases 46, 48 is pumped up by an oil pump (not shown) and is supplied from above the gear cases 46, 48 again.

As shown in FIGS. 2 and 3, there are two clamp up/down units 9 and 18 in the front and back direction.

Next, referring to FIGS. 6 and 7, the feed unit 52 that moves the feed bar 10 in the front and rear directions will be explained. Like the clamp up/down unit 18, the feed unit 52 is also suspended and supported by the suspension frame 19. A feed pin 16 that moves the feed bar 10 in the front-back direction holds the feed bar 10 so as to be slidable in the vertical and front-back directions. It is fixed to the slider 54. The slider 54 is a slide guide 56
It is possible to slide laterally along the The slide guide 56 is fixed to the slide frame 58. The slide f1 norm 58 is connected to the feed unit 52
The unit housing 60 can be slid in the front and back direction along two slide guides 62 (see FIG. 1) that extend in the front and rear directions. A ball screw nut 64 is fixed to the center of the slide frame 58, and a feed screw 66 is inserted through the nut 64 horizontally in the longitudinal direction. The feed screw 66 has a male thread formed on its outer circumferential surface, and is rotatably supported by the unit housing 60. There is a pulley 6 at the rear end of the feed screw 66.
8 is fixed, and this pulley 68 is rotated by a feed motor 72 via a belt 70. The shaft of the feed motor 72 is parallel to the feed screw 66. Note that a proximity switch 74 is provided between the slide frame 58 and the unit housing 60,
The movement of the slide frame 58 in the longitudinal direction is detected. A proximity switch 76 is also provided between the slide frame 58 and the slider 54, so that the lateral movement of the slider 54 can be detected.

Next, the operation of this embodiment will be explained. First, the operation of clamping or unclamping a workpiece by lateral movement of the feed bar 10.10 will be explained.

The feed bars 10, 10 positioned at a height for clamping the workpiece move toward the center in the lateral direction to perform a clamping operation. This clamping operation is performed by transmitting the rotation of the shaft of the clamp motor 36 to the feed screw 32 via the bevel gear 34. The male thread on the outer peripheral surface of the feed screw 32 meshes with a ball inside the nut 31 of the ball screw, and moves the nut 31 in the lateral direction by rotation. Since the nut 3l is integrally fixed to the slide frame 22, the slide frame 22 will move laterally along the slide guide 30. This slide frame 22 holds an up-down rond 20, and a front and rear guide 12 supports the feed bar 10 at the upper end of the up-down rond 20, so that the feed bar 10 moves laterally. At this time, the male thread of the feed screw 32 or the ball groove inside the nut 31 is a reverse thread on the left and right slide frames 22 and 22,
When the feed screw 32 rotates in one direction, the pair of left and right feed bars 10 and 10 move symmetrically. The unclamping operation is performed by the cool lamp motor 36.
This is done in the same manner as above by rotating the shaft in the opposite direction.

Next, we will explain the up or down operation that the feed bar 10 performs by moving up and down. With the feed bar 0.10 clamping or unclamping the workpiece, the up/down motor 44 operates and the shaft rotates. This is done by being transmitted to the spline rod 38 via the bevel gear 42. The spline rond 38 rotates the pinion gear 26 that is engaged with the spline 40, and this pinion gear 26 rotates the up-down rond 20.
Since it is engaged with the rack gear 24, the up-down rond 20 is moved up and down. At this time, since the spline rod 38 can slide in the axial direction while being engaged with the pinion gear 26 by the spline 40, rotational force can be transmitted regardless of the position of the pinion gear 26, that is, the position of the slide frame 22. The feed bar 10 can be moved up and down. By rotating the up-down motor 44 forward or backward, the feed bar 10 can be moved up or down.

Next, the forward or backward movement of the feed bar lO in the front-rear direction will be explained. When the feed bar 10.10 is clamping the workpiece (during forward movement), the feed motor 72 is in the unclamped state (during backward movement).
When the shaft of the plow motor rotates, the rotation is transmitted to the pulley 68 via the belt 70, causing the feed screw 66 to rotate. This rotation causes the ball nut 64 to move back and forth, and the slide frame 58 to which this nut 64 is fixed also moves back and forth. This plowing of the ball screw is similar to the clamping operation or unclamping operation described above.

As the slide frame 58 moves back and forth, the slider 54 and feed pin l6 also move back and forth.
At this time, the slider 54 to which the feed pin 16 is fixed is free to slide laterally along the slide guide 56 of the slide frame 58, and the feed pin 16 is fixed to the slider 54.
Since the foot 110 is free to slide in the vertical force direction along the feed bin 16, the feed shank 10 can be moved back and forth no matter what lateral or vertical position the foot shank 10 is in.

As explained above, in the transfer device of this embodiment, the suspension frame l provided above the work floor 17 is
A feed bar 10 is provided below the clamp up/down unit l8 which is suspended and supported by the suspension frame 19 to perform clamping and unclamping operations, and the feed unit 5 is suspended and supported by the suspension frame 19.
2, the feed bar 10 is configured to move forward and backward, so compared to conventional devices in which the main body of the device, that is, the clamp up/down unit and the feed unit are directly installed on the work floor, the following advantages are achieved. have an effect.

(2) There is no main body of the device below the feed bar 10 (see Fig. 3), and there is a free space, which means that there is a large working area for pressing and feeding the workpieces. This makes it easy to install peripheral equipment, such as a conveyor and a loading machine for loading workpieces.

■Generally, the upper mold for pressing is smaller than the lower mold, so it is better to lower the feed bar 10 from above (down operation) and clamp the workpiece, for example, because the amount of lateral movement for clamping is smaller. Control is facilitated because the number is small. In contrast, in the past, the device rose upwards from the main body of the device installed on the work floor and then performed the clamping operation, so it had to move a lot laterally to pass the large lower die and perform the clamping. I had to. This large movement is necessarily repeated in a series of repeated operations of the feed bar, and therefore, control is troublesome and the llltl feeding operation cannot be performed quickly. In contrast to this, in this embodiment, as described above, the amount of movement is small and control is easy.

■In this example, a ball screw is used in the place where a conventional rack and pinion was used, so the ball screw can only be lubricated with grease, eliminating the need for large-scale lubrication methods such as an oil bath. In other words, conventional rack and pinions always require lubricating oil, and the longer the feed bar moves in the transfer, the longer the rack gear becomes.
Storing the entire rack gear inside an oil bath was not adopted because it would increase the cost of the equipment. On the other hand, in this embodiment, by using a ball screw, it is sufficient to supply lubricant such as grease, and since bevel gears 34 and 42 are present, parts that require lubricating oil are housed in a gear case that also serves as an oil bath. This prevented oil leakage. This prevents oil from leaking from the transfer device of this embodiment, and eliminates the problem of lubricating oil falling from above even if the main body is installed above the work floor.

〔Effect of the invention〕

As explained above. According to the transnor device of the present invention, by suspending and supporting the clamp up-down unit and the feed unit by the suspension frame provided above the work floor, the device is placed below the feed bar operated by these units. Since there is no main unit, there is more free space, the work floor can be used more widely, and it is easier to place peripheral equipment.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a transfer device according to an embodiment of the present invention (II sectional view in FIG. 2), FIG. 2 is a bottom view of the entire embodiment, and FIG. Fig. 4 is a side view of Fig. 2, Fig. 5 is a sectional view of Fig. 1, Fig. 6 is an enlarged view of the FIG. DESCRIPTION OF SYMBOLS 10...Feed bar 12...Front and rear guide, 16...Feed bin, l7...Working floor, 18...Clamp up/down unit 19...
Hanging frame, 20...Up-down Rondo, 22...Slide frame, 24...Rack gear, 26...Pinion gear, 28...Units 1 housing, 30...Slide guide, 31...・Ball screw nut. 32... Feed screw, 38... Spline rond, 52... Feed unit, 54... Slider 56... Slide guide, 58... Slide frame, 60... Unit housing, 64...・Ball screw nut, 66...Feed screw.

Claims (1)

[Claims] (1) A pair of feed bars are provided parallel to each other along the transport direction of the work, and the feed bars clamp the work, ascend, move forward, descend, unclamp, and retreat to carry out the transport. In the transfer device, a feed bar is provided below a clamp up/down unit that is suspended and supported by a suspension frame provided above the work floor, and the clamping and unclamping operations are performed, and the clamping and unclamping operations are performed. 1. A transfer device characterized in that a feed bar is moved forward and backward by a feed unit suspended and supported by a feed bar.