JPH0530533B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a conveying device for workpieces.

For example, in a general press operation, a series of operations are performed such as carrying a workpiece into a press machine, positioning it, processing it, and carrying it out. Various methods have been proposed for automating this work, particularly loading and unloading, in order to perform the work without human intervention in terms of safety and efficiency. For example, a plurality of suction cups are provided at equal intervals to hold and release the workpiece on a conveyor bar supported in the arrangement direction of the press, and the conveyor bar is moved vertically and vertically by cam drive. A device that sequentially transports workpieces into and out of a press machine by reciprocating them in a timed manner in the transport direction, or a transport bar with multiple suction cups in order to set a large reciprocating stroke. A gear meshed with this rack is attached to the output shaft of a motor supported by a member that moves up and down with the transport bar, and by rotating this output shaft, the transport bar reciprocates in the transport direction of the workpiece. There are devices that use a combination of a motor and a link to perform both vertical and vertical reciprocating motion.

By the way, in such devices that have been proposed in the past, the plurality of suction cups are configured to be supported only by the conveyor bar.

However, when a plurality of suction cups each hold a workpiece, the total weight of the workpieces held by the suction cups is all loaded onto the transport bar, which is a heavy burden. Furthermore, since the conveyor bar must be rigid enough to support the weight of the workpiece held by the suction cup, the overall size of the apparatus tends to increase. Furthermore, there is a limit to the size of the transport bar, and therefore the weight of the workpiece that can be transported is also limited. Furthermore, as mentioned above, in the case where the motor, which is the rotational drive source of gears that mesh easily, is supported by a member that moves up and down together with the conveyor bar, the weight of the up and down moving part becomes large, making it unsuitable for high speed operation. Furthermore, it was inevitable that the vertical movement drive section of the conveyor bar would also become larger.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and it reduces the load on the conveyor bar, allows even heavy workpieces to be conveyed, is compact, and is suitable for high-speed operation. The purpose of the present invention is to provide a conveyance device for workpieces.

In order to achieve the above object, the present invention includes a transport bar, a first drive unit that moves the transport bar in the vertical direction, and a second drive unit that moves the transport bar in the transport direction of the workpiece.
a driving means having a drive unit; an interlocking bar disposed parallel to the conveyance bar and at an appropriate interval; synchronization means for synchronizing the interlocking bar with the movement of the conveyance bar; A connecting bar installed between the interlocking bar and a holding means for the workpiece attached to the connecting bar,
Attaching the first and second drive units to fixed positions separated from movement of the transport bar,
The conveyor bar is integrally provided with a belt-shaped engaging body in the conveyance direction of the workpiece, rotatably supports a rotary engaging body that meshes with the belt-shaped engaging body, and rotates in synchronization with the vertical movement of the conveyor bar. a holding member that constantly engages the rotating engaging body with the band-shaped engaging body by moving the engaging body up and down; and a transmission mechanism that transmits the driving force of the second drive unit attached at a fixed position to the rotating engaging body. It is characterized by having the following.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example in which the present invention is applied to a press material conveying device in a press machine.
In the figure, 1 is a press machine generally called a portal press machine, with opposing legs 1a, 1b, 1c, 1d.
only is shown. 2 is the leg 1a of the portal press machine;
This drive section of the conveyance device is installed in the space 3 formed by the drive section 1b.The structure and operation of this drive section will first be explained with reference to FIG. Note that the drive unit 2 in FIG. 1 is a diagram in which the drive unit, which will be described later, is covered with a cover. 50 is a base, a block 51 is fixed to this base 50, and a support shaft 52,
53, 54, and 55 are planted. Each of these support shafts 52, 53, 54, 55 has a lever 56,
57, 58, and 59 are rotatably supported.
At one end of the levers 58 and 59 are rollers 60 and 61.
are each rotatably attached, and the rod 62
Therefore, the movement of the lever 58 is linked to the movement of the lever 59. lever 56 and lever 5
One end of the arm 57a of No. 7 is rotatably supported by support shafts 64 and 65 implanted in the rocking plate 63, and furthermore, rollers 66 and 6 are supported on the respective support shafts 64 and 65.
7 is rotatably provided. Also, lever 5
One end of a first actuating shaft 10, which will be described later, is connected to the arm 57b of No. 7, and when the lever 57 rotates about the support shaft 53, the first actuating shaft 10 is reciprocated in its longitudinal direction. It's summery. lever 56
and 59 are extended in the direction opposite to the mounting ends of the rollers 66 and 61 with respect to the support shafts 52 and 55, respectively, and their extended ends are connected by a rod 68, and the extended end of the lever 56 is further provided with a lifting rod 6.
One end of 9 is connected. The other end of the lifting rod 69 is connected to a pin 74 implanted in a rotary plate 73 attached to an output shaft 72 of a reversible rotary motor 71 attached to a fixed block 70. 4 is a conveyor bar, which is conveyed by rollers 60, 61, 66, 67.
It is supported in points.

Therefore, by rotating the output shaft 72 of the reversible rotary motor 71 by an appropriate angle in either direction, the elevating rod 69 is moved up and down, and this movement moves the lever 56, the support shaft 64, the roller 66, and the rocking plate on one side. 63, the support shaft 65, the roller 67, and the lever 57, and the other is transmitted to the rod 68, the lever 59, the roller 61, the rod 62, the lever 58, and the roller 60, so the rollers 60, 61, 66, 67
The conveyor bar 4 supported by the conveyor bar 4 moves up and down.

Reference numeral 75 is a reversible rotary motor and is attached to a block 76 attached to the base 50. The output shaft 77 of this motor 75 has a pulley 78, and the rotation of this pulley 78 is controlled by the rotation of the pulley 78. The belt 8 is attached to a pulley 82 attached to one end of a rotating shaft 81 rotatably provided on a bearing 80a of a lever 80 that rotates around a supporting shaft 79.
3. Lever 8
One end of the bearing portion 80a of the bearing 80a is rotatably supported by a sliding plate 85 that is slidable along an elongated hole 84 provided in the swing plate 63. Further, a gear 86 is fixed to the other end of the rotating shaft 81, and this gear is attached to a rack 87 laid longitudinally on the side surface of the conveyor bar 4.
It has an interlocking relationship with Therefore, when the output shaft 77 of the reversible motor 75 is rotated in the direction of arrow A,
This motion is transmitted to the pulley 78, belt 83, pulley 82, rotating shaft 81, gear 86, and
6 in the direction of arrow B moves the rack 87, that is, the conveyor bar 4 to the left in the figure. By rotating the rotating shaft 77 of the reversible rotary motor 75 in the direction opposite to the arrow A, the conveyor bar 4
can be moved to the right in the figure.

Note that when the transport bar 4 moves up and down, the rotating shaft 81 to which the gear 86 is fixed is supported by the bearing part 80a of the lever 80 that swings about the support shaft 79. Since the gear 86 swings about the support shaft 79 together with the lever 80 while following the rotation angle, the meshing relationship between the gear 86 and the rack 87 is always maintained.

This completes the explanation of the drive unit 2, and the explanation will be returned to FIG. 1 again.

A lever 6 and an L-shaped lever 7 are fixed to the vicinity of both ends of the second operating shaft 5, and legs 1b and 1 are fixed to both ends of the second operating shaft 5.
It is rotatably supported by brackets 8 and 9 attached to c. Therefore, the second operating shaft 5, lever 6, and L-shaped lever 7 are integrally supported by brackets 8 and 9 so as to be freely rotatable. Also,
One end of the lever 6 and the arm 5 of the lever 57 of the drive unit 2
7b through a first operating shaft 10. Furthermore, the lever 11 is attached to the support shaft 1 on the bracket 9.
It is rotatably provided around 2, and
This lever 11 and the arm 7a of the L-shaped lever 7 are connected by a rod 13, and the lever 11 is connected to the arm 7a of the L-shaped lever 7.
It follows the movement of the letter-shaped lever 7. 14 is a bracket provided on the leg 1d, and a lever 17 and an L-shaped lever 1 are attached to the support shafts 15 and 16, respectively.
8 is rotatably supported, and lever 17 and L
The arm 18a of the L-shaped lever 18 is connected to the arm 18a by a rod 19, and the lever 17 is connected to the L-shaped lever 18.
It has come to follow the movement of. Further, one ends of the arms 7b and 18b of the L-shaped levers 17 and 18 are connected to each other by a third operating shaft 20.
Rollers 21, 22, 23, 24 are rotatably provided at one end of the levers 11, 17 and one end of the arms 7a, 18a of the L-shaped levers 7, 18, respectively. bar 25
is supported so as to be parallel to the conveyor bar 4. In FIG. 1, two connecting bars 26 and 27 are installed between the conveyance bar 4 and the interlocking bar 25. As shown in FIG. And these two connecting bars 26, 27
Two suction cups 28 are attached to each of them, and are connected to a vacuum source (not shown) via piping 29.

In addition, 30 in the figure is the bed of the press machine, and the press material is carried onto this bed by the operation described later.
Moreover, it is carried out from this bed 30 to the outside. In addition, the press parts of the press machine 1, which are not shown, include a conveyor bar 4, an interlocking bar 25, a connecting bar 26,
The position of each bar is set so that it can descend sufficiently into the space surrounded by 27.

Next, the operation of the conveyance device configured as described above will be explained step by step.

(1) The conveyance bar 4 and the interlocking bar 25 are stopped at a position raised in the _Y1 direction at the position shown in the figure.

(2) Next, the reversible rotary motor 75 rotates its rotating shaft 77 in the direction of arrow A, and rotates the gear 86 in the direction of arrow B, thereby moving the conveyance bar 4 in the _X1 direction. Naturally, this movement is transmitted to the interlocking bar 25 by the connecting bars 26, 27, and each bar 4, 25 is connected to the rollers 60, 61, 6.
It moves while being supported by 6, 67, 21, 22, 23, and 24, and this movement stops when it is located directly above a loading section (not shown). This moving distance can be determined by appropriately setting the rotation speed of the output shaft 77.

(3) Next, the reversible rotary motor 71 has its output shaft 72
For example, rotate it by an appropriate angle in the direction of arrow C.
This movement causes the transport bar 4 to move downward in the _Y2 direction as described above. Further, in this operation, the arm 57b of the lever 57 swings in the counterclockwise direction D around the support shaft 53. This movement in the D direction includes movement of the first actuation shaft 10 in the direction of arrow E, movement of the second actuation shaft 5 in the direction of arrow F, movement of the L-shaped lever 7 in the direction of arrow G, and movement of the third actuation shaft 20 in the direction of arrow G. The movement of the L-shaped lever 18 in the H direction is sequentially transmitted to the movement of the L-shaped lever 18 in the direction of the arrow J.
The lever 17 is rotated by the rod 19 in the same direction as the arrow J, and the interlocking bar 25 supported by rollers 21, 22, 23, 24 is moved to the conveyor bar 4. Synchronize with and make a downward movement in the Y ₂ direction. Therefore, the connecting bars 26 and 27, which have suction cups 28 and are supported by the conveyor bar 4 and the interlocking bar 25, also descend.
The suction cup 28 comes into contact with the press material in a loading section (not shown), and communicates with a vacuum source (not shown) via piping 29.
8 adsorbs the press material.

(4) Next, the output shaft 72 of the reversible motor 71 rotates in the direction opposite to arrow C and returns to the position shown in FIG. This movement follows the process exactly opposite to the above-mentioned operation (3), and the conveying bar 4, interlocking bar 25, and connecting bars 26, 27 rise in the _Y1 direction. At this time, the suction cup 28 rises while holding the press material.

(5) Next, the reversible rotary motor 75 rotates its output shaft 77 in the direction opposite to arrow A, and rotates the gear 86 in the direction opposite to arrow B, thereby moving the conveyance bar 4 in the _X2 direction. In this case, similarly to the operation (2) above, this movement is transmitted to the interlocking bar 25 via the connecting bars 26 and 27,
The suction cup 28 holds the press material and
Return to the state shown in the figure.

(6) Next, the connecting bars 26 and 27 are lowered by the same movement as in (3) above. However, the difference from (3) is that in the operation (6), the suction cup 28 holds the pressed material, and when this pressed material is placed on the bed 30 of the press machine 1, the piping 29 and a vacuum source (not shown) are cut off, the suction cup 28 releases the press material, and a positioning device (not shown) of the press 1 holds the released press material.

(7) Return to state (1) by the same movement as in (4) above. However, the difference from (4) is that the suction cup 28 does not hold the press material.

(8) The press machine 1 presses the press material held by the positioning device (not shown).

In the above explanation, only one step of carrying the press material into the press 1 was explained, but after the steps (1) to (8) are completed, the press machine 1 is placed in the direction indicated by X ₂ . In the case of unloading to an unloader section that omit be understood.

In the embodiment described above, the connecting bars 26, 27
The suction cup 28 is held at the top, and one end of each of the connecting bars 26 and 27 is connected to the conveying bar 4.
The other end is an interlocking bar 2 that interlocks with this conveyor bar 4.
5, the suction cup 2
Even if the weight of the press material held by 8 is much larger than that of the conventional press material, it can be transported, and even a material occupying a large area can be held securely. Furthermore, since the drive unit 2 of the conveying device can be placed using the space 3 formed by the legs 1a and 1b of the portal press, the space for the drive unit 2 can be arranged separately from the press 1. There is no need to provide one. Furthermore, move the suction cup 28 in the X ₁ -X ₂ direction,
A reversible rotary motor 71 serves as a vertical drive section of the conveyor bar 4 and a reversible rotary motor 7 serves as a left and right drive section for moving the conveyor bar 4 vertically and horizontally in two directions _Y1 - _Y .
5 are both fixedly arranged on a base 50 that is separated from the movement of the conveyor bar 4, so the movable parts including the conveyor bar 4 can be made as light as possible, speeding up the conveyance work and reducing the overall driving part. Can be made smaller.

In the above embodiment, the transport bar 4 and the interlocking bar 2
5 and two connecting bars 2 having suction cups 28 between them.
A pair of connecting bars 26 and 27 were installed, and the suction cup 28 was used to carry the press material into the press machine and to carry it out of the press machine. If a plurality of sets, for example, another set, are provided in _one direction (or in the X _two directions), one set can be used for carrying in the press material, and the other set can be used for carrying out the press material. Furthermore, it is not always necessary to use two connecting bars as a set; in this embodiment, the number of connecting bars is only two because the pressed material occupies a relatively large area.

Furthermore, in the embodiment, an example was explained in which a loader section and an unloader section for press material are arranged on both sides of a press machine. However, if a plurality of press machines are arranged in the X _{1 -} It is also possible to apply it to the delivery work.

As explained above, according to the present invention, even when the weight of the workpiece is larger than that of the conventional method, it is possible to reliably transport the workpiece, downsize the transport device, and speed up the transport work. can also be easily achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example in which the present invention is applied to a conveyance device for workpieces in a press machine, and FIG. 2 is a detailed view of a portion of FIG. 1. 2... Drive unit, 4... Transport bar, 5... Second operating shaft, 10... First operating shaft, 20... Third operating shaft, 25... Interlocking bar, 26, 27... Connection bar, 28...suction cup.

Claims (1)

[Scope of Claims] 1. A transport bar, a driving means having a first drive unit that moves the transport bar in the vertical direction, and a second drive unit that moves the transport bar in the transport direction of the workpiece; Interlocking bars arranged in parallel and at appropriate intervals, synchronizing means for synchronizing the interlocking bars with the movement of the conveyance bar, and a connection bar installed between the conveyance bar and the interlocking bar; holding means for the workpiece attached to the connection bar; the first and second drive parts are attached to fixed positions separated from movement of the conveyance bar; A band-shaped engagement body is integrally provided in the conveyance direction of the workpiece, rotatably supports a rotating engagement body meshing with the band-shaped engagement body, and the rotation engagement body is moved up and down in synchronization with the vertical movement of the conveyance bar. and a transmission mechanism that transmits the driving force of the second drive unit attached at a fixed position to the rotary mesh body. Features: Workpiece conveyance device. 2. Claim 1, characterized in that the driving means is disposed in a space included in a processing machine for a workpiece.
A conveyor device for the workpiece described in Section 1. 3. The workpiece according to claim 2, wherein the workpiece is a press material, the processing machine is a press machine, and the space is formed by two legs of the press machine. Transport device for processed products.