JPH0446661B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a workpiece conveyance device.

For example, in press operations, a series of operations are generally performed, including loading a workpiece into a press, positioning it, processing it, and unloading it. In this work, especially in loading and unloading work, work safety,
From the viewpoint of efficiency, various methods of automating this work have been proposed in order to perform it without human intervention. For example, suction cups for holding and releasing the workpieces are provided at both ends of a conveyance bar supported in the arrangement direction of the press machines, and the conveyance bar is moved vertically and in the arrangement direction of the press machines, that is, the workpieces are A drive device that has a guide function that reciprocates in the conveyance direction and guides the movement of the conveyor bar in the two directions described above moves the conveyor bar in the two directions described above in synchronization with the movement of the press machine, and the suction There is an apparatus in which workpieces are sequentially transported by a disk.

By the way, when using such a device as a conveyance device for workpieces in press work,
One conveying device was installed between adjacent press machines. As mentioned above, the drive device that gives motion to the transport bar itself has a guide function for the transport bar, and because the transport bar is supported only by this guide function, the transport bar is stably supported. In order to do this, the length of the conveyor bar in the direction of conveyance of the workpiece cannot be made very long, and therefore the work that can be done with one conveyor is limited to the work that can be done by passing the work from one of two adjacent presses to the other. This is because the purpose was to transport processed products.

However, when transporting workpieces between multiple press machines in sequence, if a transport device is installed between adjacent press machines, it is necessary to secure floor space for the installation, and the press It was necessary to leave a wide space between the machines and the presses.
Furthermore, in addition to the timing between the press machines and the conveying devices installed between each press machine, the timing between multiple conveying devices also had to be controlled, and it took a lot of time to set the timing. .

The present invention was made in order to eliminate the above-mentioned drawbacks, and it is possible to take a large stroke of the conveyor bar in the conveyance direction of the workpiece and to convey the workpiece in a stable state. The purpose is to provide a conveyance device for processed products.

In order to achieve this object, the present invention provides a transport bar having a plurality of holding means for the workpiece along the transport direction of the workpiece, and a guide means for supporting the transport bar movably in the transport direction. , has
The transport bar is reciprocated in the transport direction with a reciprocating mechanism with respect to the guide means, and the transport bar is moved up and down with a vertical movement mechanism via the guide means, thereby moving the workpiece into the processing machine. In the conveying device for a workpiece, which sequentially conveys a workpiece, a drive device including a first drive source of the reciprocating mechanism and a second drive source of the vertical motion mechanism is installed in an installation space provided in the processing machine. At the same time, the reciprocating mechanism includes a rotary engagement body fixed to a rotation shaft connected to a drive shaft of the first drive source fixedly arranged in the installation space, and a rotary engagement body provided on the conveyance bar and configured to rotate the rotation mechanism. and a band-shaped engaging body that meshes with the engaging body, further supporting the conveying bar at at least one location in the conveying direction of the workpiece so as to be movable in the conveying direction and interlocking with the vertical movement mechanism. The present invention is characterized in that an auxiliary guide means is provided to guide the vertical movement of the conveyance bar.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan layout showing an example in which the present invention is applied to conveying press material between a plurality of press machines, where 1, 2, and 3 are linearly arranged press machines, 1a, 2a, 3a is a workbench of each press machine, and 1b, 2b, and 3b are molds.
Reference numeral 4 denotes a conveyance device, which is composed of a drive device 5, a conveyance bar 6, and an auxiliary guide device 7, which are arranged in an installation space provided in the press machine 1.
supports the conveyance bar 6 and moves it up and down and in the conveyance direction of the workpiece, and the auxiliary guide device 7
It guides the movement of the transport bar 6. In this embodiment, six arms 8, 9, 10, 11, 12, and 13 are provided on the conveyance bar 6 at right angles to the longitudinal direction of the conveyance bar 6 and at equal intervals. Also, at the tips of each of these arms 8 to 13, suction cups 8a, 9a, 10a,
11a, 12a, and 13a are provided. 1
Reference numerals 4 and 15 indicate intermediate stands disposed between the presses 1 and 2 and between the presses 2 and 3, respectively; 16 is a loader section for press material as a workpiece; and 17 is an unloader section.

Note that the distance between the loader section 16 and the mold 1b, the distance between the mold 1b and the intermediate stand 14, and the interval between the intermediate stand 14 and the mold 2
b, the distance between the mold 2b and the intermediate stand 15, the interval between the intermediate stand 15 and the mold 3b, and the interval between the mold 3b and the unloader part 17 are all the same distance l, and the distance between the mold 2b and the intermediate stand 15 is the same, and Arm 8, 9, 10, 11,
The distance between 12 and 13 is also l.

Although a detailed explanation of the conveyance device 4 will be given later, the operation of the press material conveyance device configured as above will be explained. First, the transport bar 6 is moved from the stopped state in the raised position (perpendicular to the plane of the paper in FIG. Once there, this movement is stopped. At this time, suction cups 9a, 10a, 11a, 12a, 13
a is located directly above the mold 1b, intermediate stand 14, mold 2b, intermediate stand 15, and mold 3b, respectively.
Next, the transport bar 6 is lowered from that position (perpendicular to the plane of the paper and in the opposite direction to the front), and the suction cups 8a come into contact with and suck the press material in the loader section 16, and the suction cups 9a to 13a also do the same. , adsorbs the press materials conveyed in the previous process. Next, with each suction cup holding the press material, the conveyor bar 6 rises and moves to the right in FIG. 1, and this movement stops when the suction cup 8a is located directly above the mold 1b. . Then, the transport bar 6 descends,
The press material held by each suction cup 8a to 13a is released, and then the conveyor bar 6 rises and moves half a stroke (l/2) to the left to the initial position.
That is, the state returns to the state shown in FIG. Through this series of steps, the press material is transported from the loader section 16 to the mold 1b, the press material that was in the mold 1b is transferred to the intermediate stand 14, the press material that was in the intermediate table 14 is transferred to the mold 2b, The press material in the mold 2b is transferred to the intermediate table 15, the press material in the intermediate table 15 is transferred to the mold 3b, and the press material in the mold 3b is transferred to the unloader section 17.

Therefore, when a plurality of press machines are arranged in a straight line and the press material is conveyed between these press machines, the drive device 5 having a guide mechanism for the conveyance bar 6 is used.
In addition to this, an auxiliary guide device 7 is also provided, so
The conveyor bar 6 can be made longer, and therefore only one drive device 5 is required.

Further, in this embodiment, since the drive device 5 is arranged in the installation space provided in the press machine 1, there is no need to secure an area occupied by the drive device 5 separately from the press machine. In addition, although it is desirable that the press machine 1 is generally a press machine called a gantry press machine, it is not limited to this.

Next, the above-mentioned conveying device 4 will be explained in detail using FIG. 2. In the figure, 20 is a base, a block 21 is fixed to this base 20, and furthermore, this block 21 has support shafts 22, 2
3, 24, and 25 are planted. These support shafts 22, 23, 24, 25 are provided with levers 26, 2, respectively.
7, 28, and 29 are rotatably supported. Rollers 30 and 31 are rotatably attached to one end of the levers 28 and 29, respectively, and a rod 32 causes the movement of the lever 29 to follow the movement of the lever 28. lever 26 and lever 2
One end of the arm 27a of No. 7 is rotatably supported by support shafts 34 and 35 implanted in the rocking plate 33, and furthermore, rollers 36 and 37 are rotatably provided on the respective support shafts 34 and 35. , a conveyor bar 6 is supported and guided by rollers 30, 31, 36, 37. Further, one end of an operating shaft 65 (described later) is connected to the arm 27b of the lever 27, and when the lever 27 rotates around the support shaft 23, the operating shaft 65 is connected to the arm 27b of the lever 27.
5 is reciprocated in the directions of arrows A and B. Lever 2
6 and 28 extend in the direction opposite to the mounting ends of the rollers 36 and 30 with respect to the support shafts 22 and 24, respectively;
The extended ends of the lever 26 are connected by a rod 38, and the extended end of the lever 26 is further connected to a lifting rod 3.
One end of 9 is connected. The other end of the lifting rod 39 is connected to a rotating plate 43 attached to an output shaft 42 of a reversible rotary motor 41 attached to a fixed block 40.
It is connected to a pin 44 implanted in the. Reference numeral 45 is a reversible rotary motor attached to a block 46 attached to the base 20. A pulley 48 is fixed to an output shaft 47 of this motor 45, and the rotational movement of this pulley 48 is controlled by one end of a rotating shaft 49. It is transmitted via a belt 51 to a pulley 50 fixed to the. Further, the rotating shaft 49 is rotatably supported by a bearing portion 53a of a lever 53 that rotates around a support shaft 52 implanted in the block 21, and one end of the bearing portion 53a of the lever 53 is pivoted. It is rotatably supported by a sliding plate 54 that is slidable along a long hole 33a provided in the moving plate 33. A gear 55 is fixed to the other end of the rotating shaft 49, and this gear 55 meshes with a rack 56 installed along the longitudinal direction of the side surface of the conveyor bar 6.
To explain the auxiliary guide device 7, support shafts 58 and 59 are installed in a fixed bracket 57.
A lever 6 is attached to each of these support shafts 58 and 59.
0 and 61 are rotatably supported. Further, rollers 62 and 63 are rotatably supported at one end of the lever 60 and one end of the arm 61a of the lever 61, and the conveyor bar supported by the rollers 30, 31, 36, and 37 is supported by these rollers 62 and 63. 6 and guides its movement. A rod 64 connects the levers 60 and 61, and the rod 64 allows the movement of the lever 60 to follow the movement of the lever 61. 65 is lever 61
This is an operating shaft that connects the arm 61b of the lever 27 with the arm 27b of the lever 27 in the drive device 5 described above. Note that only the arms 12 and 13 are shown on the conveyor bar 6 in FIG.

The operation of the transport device configured in this way will be explained. First, the vertical movement of the suction cups 8a to 13a, that is, the vertical movement of the conveyor bar 6 will be explained. The output shaft 42 of the reversible motor 41 is first
Rotate an appropriate angle in the direction of arrow C from the position shown in the figure.
This movement causes the lifting rod 39 to rise,
This movement is caused by the lever 26, the spindle 34, the roller 36, the swing plate 33, the spindle 35, the roller 37,
The other is a rod 38, a lever 28, a roller 30, a rod 32, a lever 29,
The roller 31 and therefore the rollers 30,3
1, 36, 37 are support shafts 24, 25, 22, 2, respectively.
The rollers 30, 31, 36, 3 swing downward according to the rotation angle of the output shaft 42 with
The conveyance bar 6 supported by 7 also descends. At this time, the rotation movement of the arm 27b of the lever 27 in the counterclockwise direction about the support shaft 23 causes the operating shaft 65 to move as indicated by the arrow A.
move in the direction. Lever 6 of auxiliary guide device 7
1, the support shaft 5 is moved by the movement of the operating shaft 65 in the direction of arrow A.
This movement causes the lever 60 to rotate counterclockwise around the support shaft 58 via the rod 64, thereby auxiliary guiding the conveyor bar 6. The rollers 62 and 63 also follow the drive device 5 and function to lower the conveyor bar 6. It will be understood that raising the conveyor bar 6 can be done by rotating the output shaft 42 of the reversible motor 41 in the direction opposite to arrow C and returning to the state shown in FIG.

Next, the movement of the transport bar 6 in the left-right direction will be explained in detail. The output shaft 47 of the reversible motor 45 is indicated by arrow D.
When rotated in the direction, this movement is transmitted to the pulley 50 and the rotating shaft 49 via the belt 51, and the gear 5
5 in the direction of arrow E moves the rack 56, that is, the conveyor bar 6 to the left in the figure.
This movement depends on the rotation speed of the rotating shaft 47. Furthermore, it will be understood that in order to move the conveyance bar 6 to the right side in the figure, the output shaft 47 of the reversible rotary motor 45 may be rotated in the direction opposite to the arrow D.

Note that when the conveyance bar 6 performs the above-described vertical movement, the rotating shaft 49 to which the gear 55 is fixed is supported by a bearing portion 53a whose one end is rotatably supported by the sliding plate 54, and the lever 53 is Support shaft 5
Since the gear 55 and the rack 56 rotate around the gear 55 following the vertical movement of the conveyor bar 6, the meshing relationship between the gear 55 and the rack 56 can be maintained at all times.

According to the above embodiment, in addition to the above-mentioned effects, the following effects are also obtained. That is, a reversible rotary motor 45 that reciprocates the transport bar 6 in the left and right direction.
is attached to the block 46 at a fixed position that is separated from the movement of the transport bar 6 (vertical movement and lateral movement), so the weight of the vertical movement part including the transport bar 6 can be reduced, and this makes it possible to reduce the weight of the vertical movement mechanism. The reversible rotary motor 41 serving as the drive source and the entire drive device can be downsized. Further, since the gear 55 is engaged with the rack 56 provided on the conveyance bar 6, the conveyance distance of the press material can be easily changed by changing the amount of rotation of the reversible rotary motor 45.

In the above embodiment, an example was explained in which the conveying device of the present invention was applied to the transfer of press materials between multiple press machines, but as shown in the outline in FIG. The present invention can also be applied to a press machine 18 that performs a press operation. However, in FIG. 3, portions corresponding to those in FIG. 1 are given the same symbols as in FIG. 1 with a dash (') added thereto. In addition, 18a is the work table of the press machine 18;
18b indicates a mold. In this case, by moving the transport bar 6' in the vertical direction and in the transport direction of the workpiece by the drive device 5', the loader section 1
It is possible to sequentially transport the press material from 6' to the unloader section 17' with one transport device.

According to the present invention, the following effects are achieved.

Since the first drive source that reciprocates the conveyance bar in the conveyance direction of the workpiece is arranged at a fixed position separated from the movement of the conveyance bar, the weight of the vertically moving part including the conveyance bar can be reduced; Thereby, the second drive source that is the drive source of the vertical movement mechanism and the entire drive device can be downsized.

By arranging the drive device including the first drive source of the reciprocating mechanism and the second drive source of the vertical movement mechanism in an installation space provided within the processing machine,
It is no longer necessary to provide a space on the side of the processing machine to install the drive unit as in the past, so even when multiple processing machines are installed next to each other, the distance between the processing machines can be minimized. be able to.

Since the rotary engaging body is engaged with the belt-like engaging body provided on the conveyance bar, the conveying distance of the workpiece can be easily changed by changing the amount of rotation of the first drive source.

By providing the auxiliary guide means, the conveyor bar can be made longer than before, and the workpiece can be conveyed in a stable state.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan layout diagram showing one embodiment of the present invention, FIG. 2 is a partial detailed view of FIG. 1, and FIG. 3 is a schematic plan layout diagram showing another embodiment of the invention. There is. 5... Drive device, 6... Transport bar, 7... Auxiliary guide device, 8, 9, 10, 11, 12, 13... Arm, 8a, 9a, 10a, 11a, 12a, 13
a...Suction cup.

Claims (1)

[Claims] 1 A conveyance bar having a plurality of holding means for the workpiece along the conveyance direction of the workpiece, and a guide means for supporting the conveyance bar so as to be movable in the conveyance direction, and The workpieces are sequentially transported to the processing machine by reciprocating the transport bar in the transport direction with a reciprocating mechanism and vertically moving the transport bar with a vertical movement mechanism via the guide means. In the workpiece conveyance apparatus, a drive device including a first drive source of the reciprocating mechanism and a second drive source of the vertical movement mechanism is disposed in an installation space provided in the processing machine, and the The reciprocating mechanism is provided with a rotating engagement body fixed to a rotating shaft connected to a drive shaft of the first drive source fixedly arranged in the installation space, and a rotating engagement body provided on the transport bar and meshing with the rotating engagement body. The conveyor bar is supported at at least one location in the conveyance direction of the workpiece so as to be movable in the conveyance direction, and the conveyor bar is moved in conjunction with the vertical movement mechanism. A conveying device for a workpiece, characterized in that it is provided with an auxiliary guide means for guiding the vertical movement of the workpiece.