JP2008049356A - Device for carrying out metal plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for carrying out a metal plate with which cycle time is improved without generating delay in the carrying-out of the metal plate even when the working time is short and which is enough by simple constitution. <P>SOLUTION: This device is a device for carrying out a metal plate for carrying out the machined metal plate W from a metal plate machining machine 1 to a metal plate carrying out part 3. The device is provided with a plurality of tracks 11, 12 which are installed in parallel between the metal plate machining machine 1 and the metal plate carrying out part 3 and traveling bodies 13, 14 which are respectively independently provided on these respective tracks 11, 12 and travel back and forth between the metal plate machining machine 1 and the metal plate carrying out part 3. Each of the traveling bodies 13, 14 has a metal plate holding means 16 for holding the metal plate W on the metal plate machining machine 1. While one of the traveling bodies 13, 14 travels from the metal plate machining machine 1 toward the metal plate carrying out part 3, it is possible that the other traveling body 13, 14 performs action for holding the metal plate W on the metal plate machining machine 1 by the metal plate holding means 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plate material unloading device for unloading a plate material processed by a plate material processing machine such as a punch press or a laser processing machine.

  In a plate material processing machine such as a punch press, a plurality of product plate materials are cut out from a material plate material by punching or the like, or a hole is formed in a single plate material. The product plate processed by the plate processing machine is unloaded to a predetermined plate unloading unit by the plate unloading device.

  As such a plate material carrying-out device, there is a device in which a traveling body is installed on a track laid between a plate material processing machine and a plate material carrying-out part, and a plate material holding means such as a suction pad is provided on the traveling body. Also proposed is one in which the trajectory is movable in a direction perpendicular to the longitudinal direction, and the traveling body is movable in two orthogonal axes (for example, Patent Document 1). The thing of patent document 1 makes the board | plate material holding | maintenance means of a traveling body expandable / contractable in a driving | running | working direction, and the device which copes with various magnitude | sizes of a product board | plate material is made | formed.

As another plate material carrying-out device, a device has been proposed in which a plurality of traveling bodies are run on an endless circular track so as to improve the cycle time so that there is no delay in carrying out a plate material having a short processing time. (Patent Document 2).
JP 2003-136166 A JP 2000-351032 A

The above-mentioned one traveling body reciprocatingly travels between the plate material processing machine and the plate material unloading part is such that when the processing time of one plate material processed by the plate material processing machine is short, the reciprocating time is the product plate material. It may take longer than the processing time. In this case, every time the plate material processing machine processes one plate material, it waits for the traveling body of the plate material carry-out device to come back, so that the processing capacity of the plate material processing machine is not fully utilized, and the cycle time is reduced. become longer.
In order to improve the cycle time, it is necessary to shorten the traveling speed of the traveling body and the acceleration / deceleration time. However, in the plate material carry-out device shown in Patent Document 1, the plate material holding means is configured to be able to expand and contract so that it can correspond to product plate materials of various sizes, and the weight of the traveling body and the plate material holding means is heavy. It is difficult to increase the running speed. If the traveling body is reduced in size and weight, the traveling speed can be increased. However, if the traveling body is simply reduced in size and weight, it is impossible to carry out a large-sized product sheet.

The thing which makes a several traveling body drive | work on the circuit track shown by patent document 2 is excellent in the surface of the efficiency improvement of unloading, and is holding large product by holding one product board | plate material with several traveling bodies. Correspondence to plate materials is also possible.
However, since it is the structure which makes a some traveling body drive | work on a circular track | orbit, the structure of the means to supply the power supply and air for suction pads to each traveling body is difficult. In the power supply system, a trolley or the like is required, which complicates the power supply equipment and makes it difficult to supply stable power. Problems remain in terms of transmission and reception of control signals to each traveling body. In addition, air cannot be supplied from a position-fixed air source to a plurality of traveling bodies that circulate, and a pump must be mounted on each traveling body. If the pumps are mounted on the individual traveling bodies, the configuration becomes complicated and the equipment cost increases, and the weight of the traveling body increases, which hinders high-speed traveling.

An object of the present invention is to provide a plate material carrying-out device that can improve the cycle time without causing a delay in carrying out the plate material even when the processing time is short, and can be simply configured. Another object of the present invention is to be able to carry out a plate material at a position deviating from the traveling body track on the plate material processing machine, and to realize the carrying out of the plate material by the traveling body of a plurality of tracks.
Still another object of the present invention is to realize effective control for improving cycle time.
Still another object of the present invention is to enable carrying out plate materials of various sizes.
Still another object of the present invention is to stably carry out even a plate material that is mostly hidden in the processing means in the plate material processing machine.

The plate material unloading device of the present invention is a plate material unloading device for unloading the processed plate material from the plate material processing machine to the plate material unloading portion, and a plurality of tracks installed in parallel between the plate material processing machine and the plate material unloading portion. A traveling body that is independently provided on each of the tracks and reciprocally travels between the plate material processing machine and the plate material unloading portion, and each traveling body includes a plate material holding means for holding the plate material on the plate material processing machine. It is what you have.
According to this configuration, the plurality of traveling bodies respectively installed on the plurality of tracks can operate independently to carry out the plate material. Therefore, even when the processing time is short, there is no delay in carrying out the plate material, and the cycle time can be improved. In addition, since each traveling body is installed so as to be able to reciprocate on each track, when supplying power or supplying air to the traveling body, from a power source or air supply source installed at a fixed position, It can be supplied by a flexible cable or piping using The energy source supply system has a simple configuration.

In the present invention, the plate member holding means of at least one traveling body in each traveling body is provided so as to be able to advance and retreat in a horizontal direction perpendicular to the traveling direction with respect to the traveling body, and the orthogonality from the trajectory of the traveling body. It is preferable to be able to hold the plate material on the plate material processing machine at a position shifted in the horizontal direction.
When a plurality of tracks are installed in parallel, one of the tracks may have to be removed from the position where the processed plate material on the plate material processing machine waits. However, by allowing the plate material holding means to move in the horizontal direction perpendicular to the traveling direction with respect to the traveling body, the traveling body on all the tracks moves to a predetermined position where the processed plate material on the plate material processing machine waits. On the other hand, it can be held by the plate material holding means. Thereby, it becomes possible to provide a plurality of tracks and carry out the plate material by the traveling body on each track. Further, if the plate material holding means is movable in the horizontal direction orthogonal to the traveling direction, it is easy to avoid the plate material holding means of each traveling body from interfering with each other during traveling.

In this invention, you may provide the independent carrying-out control means (22) which controls so that another traveling body hold | maintains the board | plate material of a board | plate material processing machine with a board | plate material holding means, while driving | running | working one traveling body.
In this way, the independent carry-out control means (22) is provided in this invention by controlling so that the other traveling body holds the plate material of the plate material processing machine by the plate material holding means during the traveling of one traveling body. The configuration in which the traveling bodies are independently installed on the plurality of parallel tracks can be effectively used, and the cycle time can be further improved.

In the present invention, a plurality of traveling body cooperating control for controlling the traveling body and the plate material holding means so as to hold one plate material by the plate material holding means of the plurality of traveling bodies and carry it out by traveling of the plurality of traveling bodies. Means (23) may be provided.
In this way, a single plate material can be held and conveyed by the plate material holding means of the plurality of traveling bodies, so that a large-sized plate material can be carried out. Therefore, it is possible to carry out various sizes of plate materials by switching between the unloading of each traveling body and the cooperative transport.

The multi-running body cooperative control means (23) is a process in which the plate material on the plate material processing machine is held by the plate material holding means by one running body and pulled in the track direction, and the drawn plate material is drawn by the other running body by the plate material holding means. It has a drawer / cooperative conveyance control unit (24) for performing a series of controls including a process of holding and a process of conveying the plate material held by the plate material holding means of both traveling bodies by traveling of both traveling bodies. Also good.
A plate material that has been processed by the plate material processing machine and waits for unloading may be mostly hidden under the processing means of the plate material processing machine, for example, under the turret in a turret punch press. In such a case, it is necessary to pull out the plate material. However, when only the exposed portion from the plate material processing means is grasped and pulled out and conveyed as it is, the holding posture of the plate material may be unbalanced and may drop. However, the drawer / cooperative conveyance control unit (24) is provided, and after the plate material on the plate material processing machine is pulled out by one traveling body, the other traveling body holds the other part of the plate material, By holding and conveying the plate material, stable conveyance is possible.

  The plate material unloading device according to the present invention is a plate material unloading device for unloading the processed plate material from the plate material processing machine to the plate material unloading portion, and a plurality of tracks installed in parallel between the plate material processing machine and the plate material unloading portion. A traveling body that is independently provided on each of the tracks and reciprocally travels between the plate material processing machine and the plate material unloading portion, and each traveling body includes a plate material holding means for holding the plate material on the plate material processing machine. Therefore, even if the processing time is short, there is no delay in carrying out the plate material, the cycle time can be improved, and a simple configuration can be used.

  The plate member holding means of at least one traveling body in each traveling body is provided so as to be able to advance and retreat in a horizontal direction perpendicular to the traveling direction with respect to the traveling body, and from the trajectory of the traveling body in the orthogonal horizontal direction. If it is possible to hold the plate material on the plate material processing machine at a shifted position, it is possible to carry out the plate material that is out of the traveling body track on the plate material processing machine, and the plate material can be carried out by the traveling body on multiple tracks. It becomes feasible.

    In the case where an independent carry-out control means for controlling so that the other traveling body holds the plate material of the plate material processing machine by the plate material holding means during the traveling of one traveling body is provided, effective control for improving the cycle time is possible. realizable.

  A plurality of traveling body cooperating control means for controlling the traveling body and the plate material holding means is provided so that one plate material is held by the plurality of traveling body plate material holding means and carried out by the traveling of the plurality of traveling bodies. In such a case, it is possible to carry out plate materials of various sizes.

  The plural traveling body cooperative control means is a process in which the plate material on the plate material processing machine is held by the plate material holding means by one traveling body and pulled in the track direction, and the drawn plate material is held by the other traveling body by the plate material holding means. And, if it has a drawer / cooperative conveyance control unit that performs a series of controls including the process of conveying the plate material held by the plate material holding means of both traveling bodies by the traveling of both traveling bodies, plate material processing Even plate materials that are mostly hidden by the processing means in the machine can be stably carried out.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a plate material processing facility provided with this plate material carry-out device. This plate material processing facility includes a plate material processing machine 1, a plate material carry-out device 2, a plate material carry-out unit 3, and a plate material stocker 4. In addition to this, the plate material processing facility includes a plate material carry-in device (not shown) for carrying the material plate material W0 into the plate material processing machine 1, but the description of the plate material carry-in device is omitted.

  The plate material processing machine 1 has a function of cutting a plurality of product plate materials W from the material plate material W0 on the table 5 by punching or the like, and includes a punch press or a laser processing machine. In this example, the plate material unloading device 1 is composed of a turret type punch press or the like, and includes a top and bottom turret 6 mounted with a punch tool and a die tool, and a punch drive mechanism that drives the punch tool of the turret 6 up and down at a processing center P. A processing unit 7 (not shown) and the like, and a plate material feed mechanism 8 that moves the material plate material W0 back and forth (Y direction) and left and right (X direction) on the table 5 are provided.

  The plate material unloading unit 3 is a device that stacks product plate materials W processed by the plate material processing machine 1 and unloaded by the plate material unloading device 2, and is installed on the side of the plate material processing machine 1. The plate material unloading section 3 includes a pallet 9 on which a plurality of types of product plate materials W can be arranged and stacked for each type, and a pallet moving mechanism 10 that moves the pallet 9 in the front-rear direction on the pallet guide rail 10a as indicated by an arrow A. Is provided.

  The plate stocker 4 is a device for storing the product plate W loaded in the plate unloading unit 3 together with the pallet 10, and includes a stocker body 4 a having a multi-stage shelf and an elevator 4 b to be taken in and out of an arbitrary level shelf. Have.

  The plate material unloading device 2 is a device that unloads the product plate material W, which is a processed plate material, from the plate material processing machine 1 to the plate material unloading unit 3. The plate material unloading device 2 includes a plurality of (two in the illustrated example) tracks 11 and 12 installed in parallel between the plate material processing machine 1 and the plate material unloading unit 3, and these tracks 11 and 12 are independent of each other. A plurality of (two in the illustrated example) traveling bodies 13 and 14 are provided so as to be able to travel. The tracks 11 and 12 are installed on a common frame 15 at both ends.

  Each traveling body 13, 14 has a plate material holding means 16 for holding the product plate material W on the plate material processing machine 1, and any one of these traveling bodies 13, 14 is directed from the plate material processing machine 1 to the plate material unloading section 3. During traveling, the other traveling bodies 13 and 14 can operate to hold the product plate material W of the plate material processing machine 1 by the plate material holding means 16.

  FIG. 6 is an enlarged side view of the rear traveling body 14. The configuration of the front traveling body 13 is the same as that of the rear traveling body 13. The traveling bodies 13 and 14 are installed on the tracks 11 and 12 via guide rollers (not shown), respectively, and are provided with a traveling drive source (not shown) such as an electric motor for self-running.

The plate material holding means 16 has a movable frame 17 installed on the traveling bodies 13 and 14 so as to be movable back and forth (Y direction), and a plurality of suction pads 18 installed on the movable frame 17. The movable frame 17 is composed of an arm-shaped member extending in the front-rear direction, and a plurality (two in the illustrated example) are provided in parallel. Each movable frame 17 is driven back and forth by a forward / backward drive source (not shown) mounted on the traveling bodies 13 and 14. The forward / backward drive source may be one that causes each movable frame 17 to advance and retract independently, or may cause both movable frames 17 to advance and retract together. The forward / backward drive source is composed of an electric motor or the like, and its rotation is converted into a linear motion via a rotation / linear conversion mechanism such as a rack / pinion mechanism or a ball screw. The forward / backward drive source may be a cylinder device.
The front traveling body 13 does not necessarily need to be able to move the plate material holding means 16 back and forth.

  In this embodiment, the suction pad 18 is composed of a bundle of a plurality of unit suctions 18a each individually connected to a vacuum source via a throttle path, and a part of the suction pad 18 is removed from the suction target such as the product plate W. Even adsorption is possible. The suction pad 18 may be configured as one negative pressure portion as a whole without being bundled as described above.

  The plate material holding means 16 can move the suction pad 18 up and down with respect to the traveling bodies 13 and 14. In this embodiment, the suction pad 18 can be individually moved via the lifting device 19 as means for moving up and down. It is installed on the frame 17. The elevating device 19 is composed of an air cylinder, for example. Instead of the elevating device 19 that elevates and lowers the suction pad 18 individually, the movable frame 17 may be installed so as to be able to elevate with respect to the traveling bodies 13 and 14, and its elevating drive source (not shown) may be provided.

  The positional relationship of the two traveling bodies 13 and 14 will be described. The two front and rear tracks 11, 12 are installed at the same height. In the plate material processing machine 1, since the final cut portion of the product plate material W is always processed at a predetermined position (for example, the punch position P), the product plate material W in the unloading standby state on the plate material processing machine 1 is always at the same position. Become. However, the same position is always one point on the outer periphery of the product plate W, and the center position of the product plate W varies depending on the size and shape of the product plate W.

The traveling body 13 on the front side can suck the product plate material W waiting at the predetermined position of the plate material processing machine 1 in a state where the plate material holding means 16 is at the reference position in the front-rear movement direction.
The rear traveling body 14 is capable of adsorbing the product plate material W waiting at the predetermined position of the plate material processing machine 1 in a state where the plate material holding means 16 is advanced to the forward end. Further, when the rear traveling body 14 passes the front traveling body 13 in the traveling direction in the state in which the plate retaining means 16 is advanced, the plate retaining means 6 interferes with the front traveling body 13. In the state where the holding means 16 is retracted to the retracted end, the dimensions and positional relationship are such that the plate material holding means 6 can pass the front and rear traveling bodies 13 and 14 without interfering with the front traveling body 13. Designed.

  The control system will be described with reference to FIGS. The plate material carry-out device 2 is controlled by the conveyance control device 21. The conveyance control device 21 includes a computer and a conveyance program to be executed by the computer, and the following independent carry-out control means 22 and plural traveling body cooperation control means 23 are configured by the program contents of the conveyance program. .

  The independent carry-out control means 22 is a means for controlling the traveling bodies 13 and 14 independently of each other including the plate material holding means 16. In a normal carry-out operation, the traveling bodies 13 and 14 are controlled by the independent carry-out control means 22. The independent carry-out control means 22 has a function of controlling so that the other traveling bodies 13 and 14 hold the plate material W of the plate material processing machine 1 by the plate material holding means 16 while any one of the traveling bodies 13 and 14 is traveling. Is provided.

  The plural traveling body cooperative control means 23 holds one product plate W by the plate material holding means 16 of the plural (two) traveling bodies 13 and 14 and carries them out by the traveling of the plurality of traveling bodies 13 and 14. As described above, it is means for controlling the traveling bodies 13 and 14 and their plate material holding means 16.

  The multi-runner cooperative control means 23 has a drawer / cooperative transport control unit 24. The drawer / cooperative conveyance control unit 24 is a control unit that performs control of the flowchart shown in FIG. 9 (which will be described in detail later with reference to FIG. 7), and controls each of the following processes. That is, a process in which the product plate material W on the plate material processing machine 1 is held by the plate body holding means 16 by one traveling body 13 and pulled out in the track direction (X direction) (step S1 in FIG. 9), The process (S2) of holding the traveling body 14 by the plate material holding means 16, and the product plate material W held by the plate material holding means 16 of the traveling bodies 13, 14 are conveyed by the traveling of the traveling bodies 13, 14. A series of control including the step (S3) is performed.

The operation of the above configuration will be described. As shown in FIG. 2, when the front traveling body 13 sucks the product plate material W on the plate material processing machine 1, the rear traveling body 14 stands by in the vicinity of the front traveling body 13, for example.
The traveling body 13 on the front side holding the product plate W travels to the plate material unloading section 3 as shown in FIG. 3 and loads the grasped product plate W on the pallet 10 of the plate material unloading section 3. After loading, the front traveling body 13 returns to the plate material processing machine 1 side.
While the front traveling body 13 carries out and returns the product plate W, the rear traveling body 14 advances the frame 17 of the plate holding means 16 forward as shown in FIG. Hold W and lift.

  The traveling body 14 on the rear side holding the product plate material W travels toward the plate material unloading section 3 with the frame 17 retracted as shown in FIG. Thereby, the front traveling body 13 returning from the plate material holding means 3 to the plate material processing machine 1 side and the rear traveling body 14 traveling to the plate material holding means 3 side can pass each other without interference. In the plate material unloading section 3, the pallet 10 is moved rearward so that the product plate material W conveyed by the rear traveling body 14 can be received.

When the traveling body 13 on the front side returns to the plate material processing machine 1, it carries out the next product plate material W in the same manner as described above. The rear traveling body 14 returns the product plate material W to the standby position in the vicinity of the plate material processing machine 1 after carrying the product plate material W to the plate material unloading section 3.
In this way, the two traveling bodies 13 and 14 each independently carry out the product plate W. Therefore, even when the processing time of the product plate W is short, there is no delay in carrying out the plate, and the cycle time can be improved.

FIG. 5 shows an operation of carrying out one product plate W by two traveling bodies 13 and 14 at the front and rear. When the product plate W is large, it cannot be transported by only one traveling body 13,14. However, as shown in the figure, the front and rear portions in the conveying direction of the same product plate material W are held by the plate material holding means 16 of the two traveling bodies 13 and 14, respectively, and both the traveling bodies 13 and 14 are driven in synchronization. It is possible to carry out the product plate material W having a large size.
Further, unlike the case where the traveling bodies 13 and 14 are enlarged and the large-sized product plate W can be conveyed, the individual traveling bodies 13 and 14 may be small, so that the traveling speed can be reduced with light weight. Deceleration time can also be shortened.
The multiple traveling body cooperative control means 23 in FIG. 8 controls the operation of carrying out the same product plate material W together with the two traveling bodies 13 and 14.

FIG. 7 shows the operation when the product plate W is hidden. As shown in FIG. 5A, when the product plate W is small and many parts are hidden by the turret 6 or the like in the processing portion 7, the product plate W can be held by the plate holding means 16 in a balanced manner. Can not.
In such a case, the exposed portion of the product plate material W from the processed portion 7 is held by the plate material holding means 16 of one of the traveling bodies 13 as shown in FIG. 9A, and the product plate material as shown in FIG. W is pulled out on the table 5 so that the whole is exposed (step S1 in FIG. 9).

Thereafter, the exposed portion of the product plate material W is held by the plate material holding means 16 of the other traveling body 14 (step S2 in FIG. 9).
In this way, in the state where the entire product plate W is held by the two traveling bodies 13 and 14 in a well-balanced manner, both the traveling bodies 13 and 14 are caused to travel together, and the two traveling bodies 13 and 14 are used for the product. The plate material W is conveyed.
Thus, even when many parts of the product plate W are hidden in the processed portion 7, the whole can be held in a well-balanced manner and stably conveyed.

  In the above embodiment, the plate material holding means 16 of both the traveling bodies 13 and 14 can be moved back and forth, but the traveling body corresponding to the reference position for carrying out the product of the plate material processing machine 1 (the front side in this embodiment) The traveling body 13) may not necessarily be movable back and forth. However, if it is possible to move back and forth, when there is a drilling or forming part inside the product plate W and the processed part is at a position corresponding to the suction pad 18, the front and back position of the plate holding means 16 is changed. By shifting the position, the suction pad 18 can be avoided from the hole of the product plate W and the molded portion, and stable suction can be performed.

It is a perspective view of the whole board | plate material processing equipment equipped with the board | plate material carrying-out apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the operation state which hold | maintains a product board | plate material with the one running body in the board | plate material carrying-out apparatus. It is a perspective view which shows the operation state which hold | maintains a product board | plate material with the other traveling body in the board | plate material carrying-out apparatus. It is a perspective view which shows the passing operation | movement of both traveling bodies. It is a perspective view which shows the operation state which conveys one product board | plate material together with both traveling bodies. It is an enlarged side view of the traveling body of the plate material carrying-out device. It is operation | movement explanatory drawing of the operation | movement which carries out the product board | plate material of the hidden state of the board | plate material carrying-out apparatus. It is a block diagram of a conceptual structure of the conveyance control apparatus of the board material carrying-out apparatus. It is a flowchart which shows control operation | movement of the drawer | drawing-out and cooperating conveyance control part in the same conveyance control apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Plate material processing machine 2 ... Plate material carrying-out apparatus 3 ... Plate material carrying-out part 4 ... Plate material stocker 5 ... Table 6 ... Turret 7 ... Processing part 8 ... Plate material feeding mechanism 9 ... Pallet 11, 12 ... Track 13, 14 ... Traveling body 16 ... Plate material holding means 17 ... movable frame 18 ... adsorption pad 21 ... conveying control device 22 ... independent carry-out control means 23 ... multi-runner cooperating control means 24 ... drawing / cooperating conveying control part P ... processing center W ... product plate material W0 ... Material board

Claims (5)

  A plate material unloading device for unloading a processed plate material from a plate material processing machine to a plate material unloading unit, and a plurality of tracks installed in parallel between the plate material processing machine and the plate material unloading unit, and each of these tracks independently. A plate material unloading device provided with a traveling body that reciprocally travels between the plate material processing machine and the plate material unloading portion, and each traveling body includes a plate material holding means for holding the plate material on the plate material processing machine.   The plate member holding means of at least one traveling body in each traveling body is provided so as to be able to advance and retreat in a horizontal direction perpendicular to the traveling direction with respect to the traveling body, and from the trajectory of the traveling body in the orthogonal horizontal direction. The plate material carrying-out device according to claim 1, wherein the plate material on the plate material processing machine at a shifted position can be held.   The plate material carrying-out device according to claim 1 or 2, further comprising independent carry-out control means for controlling so that the other running body holds the plate material of the plate material processing machine by the plate material holding means during the running of one traveling body.   A plurality of traveling body cooperating control means for controlling the traveling body and the plate material holding means is provided so that one plate material is held by the plurality of traveling body plate material holding means and carried out by the traveling of the plurality of traveling bodies. The board | plate material carrying-out apparatus in any one of Claim 1 thru | or 3.   The multi-runner cooperating control means is a process in which the plate material on the plate material processing machine is held by the plate material holding means by one running body and pulled out in the track direction, and the drawn plate material is held by the plate material holding means by another running body. And a drawer / cooperative conveyance control unit that performs a series of controls including a process of conveying the plate material held by the plate material holding means of both the traveling bodies by traveling of both the traveling bodies. Board material unloading device.

Images