WO2014115448A1

WO2014115448A1 - Workpiece removal device for thermal cutting machine

Info

Publication number: WO2014115448A1
Application number: PCT/JP2013/084048
Authority: WO
Inventors: 堀場泰史; 勝山大輔
Original assignee: 村田機械株式会社
Priority date: 2013-01-24
Filing date: 2013-12-19
Publication date: 2014-07-31

Abstract

The present invention provides a workpiece removal device (3) for a thermal cutting machine, the device being capable of transferring a plate-shape workpiece (W) supported on multiple workpiece support members (12a) formed in a spiky shape or sawtooth shape to a removal destination with a smooth movement without scratching when scooped up with a workpiece-holding fork (41). The device is provided with: a traveling body (32) capable of traveling between a position above a workpiece support table (12) and a position above the removal destination; a lifting body (34) capable of being raised and lowered with respect to the traveling body (32); a workpiece-holding fork (41) provided so as to be slidable in the horizontal direction with respect to the lifting body (34) and capable of passing vertically between the workpiece support members (12a); brushes (43) provided on each fork tooth (42) of the workpiece-holding fork (41) for supporting and holding the plate-shape workpiece (W) from below; and stoppers (51) for preventing the sliding of the plate-shaped workpiece (W) on the workpiece-holding fork (41) when the fork is slid.

Description

Work carry-out device for thermal cutting machine

Related applications

This application claims the priority of Japanese Patent Application No. 2013-010961 filed on January 24, 2013, which is incorporated herein by reference in its entirety.

This invention relates to a work carry-out device for carrying out a plate work that has been heat cut by a heat cutting machine such as a laser machine or a plasma machine to the outside of the heat cutting machine.

Generally, a thermal cutting machine such as a laser beam machine or a plasma machine has a work support table that supports a plate work from below by a plurality of work support members formed in a sword or sawtooth shape. Processing is performed on the plate material workpiece placed thereon. After the processing is completed, the work support table on which the processed plate work is placed moves to the carry-out position, and the processed plate work is carried out by the work carry-out device at this carry-out position.

The workpiece carry-out device has a workpiece holding fork in which a plurality of fork teeth are arranged in parallel, and the fork teeth of the workpiece holding fork are inserted between the workpiece support members of the workpiece support table located at the carry-out position. And the structure which scoops and picks up a board | plate material workpiece | work is employ | adopted widely (for example, patent document 1). In the workpiece carry-out device having this configuration, the workpiece holding fork picks up the plate workpiece and then moves to the upper position of the carry-out destination so that the plate workpiece held on the workpiece holding fork does not move with the workpiece holding fork. By pulling out the work holding fork in a state of being restrained by, the plate work is dropped and transferred to the carry-out destination.

Conventionally, each fork tooth of the work holding fork is generally made of a square pipe. In addition, in order to improve the relative movement between the fork teeth and the plate material work, there is a type in which a roller is attached to the upper surface of the fork teeth.

Japanese Patent Laid-Open No. 11-254165

However, fork teeth made of square pipes, the plate workpiece and fork teeth rub against each other when the workpiece holding fork is pulled out, and the contact surface of the plate workpiece with the fork teeth, that is, the back surface of the product may be damaged. There is a problem. In addition, a roller attached to the roller has a problem that the roller is fitted into a punch hole that is a cut mark of the product of the plate material workpiece, and the workpiece holding fork cannot be pulled out smoothly.

An object of the present invention is to provide a work unloading device of a thermal cutting machine that can transfer a plate work picked up by a work holding fork to a unloading destination without damaging it.

The workpiece conveying device of the thermal cutting machine according to the present invention is a thermal cutting machine for a plate workpiece that has been subjected to thermal cutting from a thermal cutting machine having a workpiece support table having a plurality of workpiece support members in the form of a sword or a sawtooth. To outside. The work carry-out device includes a traveling body capable of traveling between an upper position of the work support table and an upper position of the unloading destination that is outside the thermal cutting machine, and a lifting body that can be moved up and down relative to the traveling body. A plurality of fork teeth extending in the direction of the slide are arranged in parallel with the lifting body so as to be slidable in a horizontal direction intersecting the traveling direction of the traveling body, and can pass between the workpiece support members. A work holding fork, a brush provided on each of the fork teeth with the bristles facing upward, and holding a plate work, and the work holding fork passing through the work support surface of the work support table from below to above A lifting drive means for raising the lifting body, and a workpiece detached from the workpiece holding position where the workpiece holding fork is positioned above the carry-out destination. A slide driving means for sliding to the release position, and a plate work held on the work holding fork is prevented from sliding with the work holding fork when the work holding fork slides to the work release position. A stopper.

According to this configuration, each workpiece support member of the workpiece support table on which the processed plate material workpiece is mounted by running of the traveling body, raising and lowering of the lifting body by driving of the lifting drive means, and sliding of the workpiece holding fork by the slide driving means. In between, each fork tooth of a workpiece holding fork is inserted horizontally. Next, the elevating body is raised by driving the elevating drive means, whereby the work holding fork is raised while each fork tooth passes between the work support members, and the plate material work on the work support table is scooped by the fork teeth. take up. Next, the traveling body moves to an upper position of the carry-out destination, and further, the work holding fork slides from the work holding position to the work release position with respect to the lifting body by driving the slide driving means. At this time, the plate work is prevented from sliding with the work holding fork by the stopper, so that only the work holding fork is pulled out. The plate work is dropped downward and transferred to the transport destination.

Since the plate workpiece is supported by the brush on the workpiece holding fork, the plate workpiece does not directly rub against the fork teeth of the workpiece holding fork when the workpiece holding fork slides to the workpiece release position. Since a brush made of resin or the like is softer than a plate material workpiece made of steel plate or the like, even if the plate material workpiece and the brush rub against each other, the plate material workpiece is not damaged. In addition, when supported by a brush, the entire back surface of the plate work can be supported evenly, so even if the plate work has a punch hole that is a cut mark of the product, the work holding fork and the plate work are not caught. The plate work can be transferred to the destination at a smooth operation.

In the present invention, the work holding fork may be divided into a pair of fork split bodies at an intermediate portion in the slide direction, and the fork split bodies may slide in opposite directions so as to open and close each other. When the work holding fork is divided into a pair of fork splits, each fork split slides in the opposite direction compared to the slide distance of the work holding fork when sliding the whole work holding fork in one direction and pulling it out. The sliding distance when pulling out can be reduced to about ½. Therefore, it is possible to shorten the time required to transfer the plate material workpiece from the workpiece holding fork to the destination.

In this invention, the brush may be a plurality of bundles of a plurality of resin fibers. When the brush has the above-described configuration, it is easy to implant resin fibers into the fork teeth. Moreover, it is easy to arrange the lengths of the hair ends of the resin fibers. Furthermore, the number of resin fibers can be reduced compared to a case where resin fibers are uniformly implanted over the entire surface, and the resin fibers can be manufactured at low cost.

Any combination of at least two configurations disclosed in the claims and / or the specification and / or the drawings is included in the present invention. In particular, any combination of two or more of each claim in the claims is included in the invention.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.
It is a perspective view of the thermal cutting processing system provided with the workpiece carrying-out apparatus of the thermal cutting processing machine concerning one Embodiment of this invention. It is a front view of the thermal cutting processing system. It is a top view of the thermal cutting processing system. It is a perspective view of the workpiece | work support table of the thermal cutting processing machine in the thermal cutting processing system. It is explanatory drawing of the replacement | exchange operation | movement of the work support table. It is a top view of the workpiece conveyance head of the workpiece carrying-out apparatus in the thermal cutting processing system. It is a front view of the work conveyance head. It is a side view of the work conveyance head. It is the IXA part enlarged view of FIG. FIG. 9B is a sectional view taken along the line IXB-IXB in FIG. 9A. It is the X section enlarged view of FIG. It is explanatory drawing of the operation | movement which picks up a board | plate material workpiece | work from the workpiece | work support table of the thermal cutting processing machine by the workpiece carrying-out apparatus. It is explanatory drawing of the operation | movement which transfers a board | plate material workpiece | work to the carrying-out destination by the workpiece carrying-out apparatus.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the entirety of a thermal cutting system provided with a work carry-out device according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. This thermal cutting processing system includes a thermal cutting processing machine 1 composed of a laser processing machine, a work storage device 2 for storing a plate work W, and a work carry-out device 3. The workpiece carry-out device 3 according to this embodiment is a workpiece carry-in / out device that performs both the operation of carrying a plate work W as a raw material into the thermal cutting machine 1 and the operation of carrying out a processed plate work W from the thermal cutting machine 1. It is configured as a carry-out device. In addition, a carriage 4 for transporting the plate work W as a material from the work storage device 2 to the work carry-out device 3 and a carry-out cart 5 as a carry-out destination P3 of the processed plate work W by the work carry-out device 3 are provided. . The unloading cart 5 stopped at the predetermined position becomes the unloading destination P3.

As shown in FIGS. 2 and 3, the thermal cutting machine 1 is movable in the front-rear direction (Z-axis direction), the left-right direction (X-axis direction), and the up-down direction (Y-axis direction) with respect to the base 1a. The laser head 11 is moved in the front-rear and left-right directions while irradiating the plate workpiece W placed on the workpiece support table 12 with laser light. Cutting process. An area in which the laser head 11 moves is covered with a cover 15.

For example, as shown in FIG. 4, the work support table 12 is formed by arranging a plurality of plate-like work support members 12 a whose upper edge portions are formed in a sawtooth shape in parallel. The work support members 12a are connected to each other via a pair of connecting members 12b. Specifically, the workpiece support members 12a are inserted from above into grooves 12ba formed at equal intervals in the pair of connecting members 12b, and the workpiece support members 12a are opened up and down. Each of the teeth forming the sawtooth in each workpiece support member 12a becomes a workpiece support point 13 that supports the plate workpiece W from below. The workpiece support point 13 may not be in point contact with the plate material workpiece W completely, or may have a shape that contacts the plate material workpiece W with a certain area. The reason why the workpiece support table 12 is formed in the above-described shape is to reduce the contact area with the plate workpiece W and reduce the welding of the plate workpiece W to the workpiece support table 12 as much as possible by the heat of processing. The workpiece support table 12 is not limited to a sawtooth shape, and may have a sword mountain shape in which a plurality of needle-like workpiece support members (not shown) extending vertically are arranged vertically and horizontally.

Two workpiece support tables 12 are provided for each thermal cutting machine 1 as shown in FIGS. These two workpiece support tables 12 are loaded between a machining position P1 for cutting the plate workpiece W by the laser head 11 and between the machining position P1 and a delivery destination outside the thermal cutting machine 1. The position can be changed alternately with the exit position P2. As a position conversion mechanism for the workpiece support table 12, a mechanism (not shown) for horizontally moving the workpiece support table 12 between the processing position P1 and the loading / unloading position P2, and a mechanism for moving the workpiece support table 12 up and down at the loading / unloading position P2 ( However, since these mechanisms have a known configuration, detailed description thereof is omitted.

FIG. 5 shows the position conversion operation of the two workpiece support tables 12 (12A, 12B). FIG. 4A shows a state at the time when the cutting process for the plate work W placed on the first work support table 12A located at the processing position P1 is completed. At this time, the second workpiece support table 12B stands by at a workpiece loading / unloading height H1 higher than the height level of the processing position P1 at the loading / unloading position P2. An unprocessed plate work W is placed on the second work support table 12B. Note that the heights of the first and second workpiece support tables 12A and 12B at the machining position P1 are constant.

When the cutting process around the part W1 (FIG. 3) with respect to the plate workpiece W is completed, the first workpiece support table 12A moves horizontally to the loading / unloading position P2 as shown in FIG. It enters the lower side of the support table 12B. The height of the second workpiece support table 12B at this time is the position conversion height H2 at the same height level as the machining position P1.

Next, as shown in FIG. 6C, the two workpiece support tables 12A and 12B are both lowered, and the second workpiece support table 12B has the position conversion height H2. Then, as shown in FIG. 4D, the second workpiece support table 12B moves horizontally to the machining position P1.

As shown in FIG. 5E, the laser head 11 cuts the plate workpiece W on the second workpiece support table 12B at the machining position P1. While the cutting process is being performed, the first work support table 12A is raised to the work carry-in / out height H1. Then, the processed plate material workpiece W on the first workpiece support table 12A is unloaded by the workpiece unloading device 3 (FIGS. 1 to 3), and the state shown in FIG.

After that, the workpiece unloading device 3 loads the plate workpiece W as a material onto the first workpiece support table 12A, whereby the state shown in FIG. However, the first work support table 12A and the second work support table 12B are interchanged. The loading / unloading operation of various plate materials by the workpiece unloading device 3 will be described in detail later.

As shown in FIG. 1, the workpiece storage device 2 has a plurality of shelf-like workpiece loading sections 22 that can store pallets 21 on which a plurality of plate workpieces W are loaded. Behind these work stacking sections 22 is provided a lift 23 that lifts and lowers the pallet 21 together with the plate work W. The lift 23 has a loading / unloading device (not shown) for loading and unloading the pallet 21 between the lift 23 and the workpiece loading unit 22 at the same height. In addition, you may make it supply the board | plate material workpiece | work W currently stored in the storage place different from this thermal cutting processing system to the workpiece carrying-out apparatus 3, without providing the workpiece | work storage apparatus 2. FIG.

As shown in FIGS. 1 to 3, the workpiece carry-out device 3 is arranged between the upper position of the carry-in / out position P2 of the thermal cutting machine 1 and the upper position of the carry-out destination P3 located in front of the workpiece storage device 2. A rail 31 extending in the direction (X-axis direction) is installed, and two traveling bodies 32 are provided along the rail 31 so as to be able to travel. The traveling bodies 32 are provided with elevating rods 33 that can be moved up and down, and a work conveying head 34 having a holding means for the plate material work W is provided at the lower end of each elevating rod 33.

As shown in FIG. 8, the traveling body 32 is caused to travel by driving a traveling motor 35 incorporated in the traveling body 32. Further, the work transfer head 34 is lifted and lowered by a lifting and lowering driving means 36 including a rack 36a, a pinion 36b, a servo motor 36c for rotating the pinion 36b, and the like. Note that the lower end of the lifting rod 33 is connected to the head frame 34 a of the work transfer head 34. The head frame 34a is configured by combining a plurality of frame members vertically and horizontally, and is a lifting body referred to in the claims.

As shown in FIGS. 6 to 8, the work transport head 34 includes a plurality of suction pads 40 that are used when the plate work W is carried into the thermal cutting machine 1 as holding means for the plate work W, and a plate work. And a workpiece holding fork 41 used when carrying W out of the thermal cutting machine 1.

The plurality of suction pads 40 are provided on the head frame 34a of the work transfer head 34 so as to be arranged in the front, rear, left, and right directions, and hold the plate workpiece W by suction from the upper surface side. Each suction pad 40 is of a vacuum suction type, for example, and is connected to a suction device (not shown) via a pipe. The suction pad 40 may be of a magnetic suction type.

The work holding fork 41 includes a pair of front and rear fork divided

bodies

41A and 41B. Each fork divided

body

41A, 41B is formed by arranging a plurality of fork teeth 42 extending in the front-rear direction (Z-axis direction) in parallel and connecting the base ends of the fork teeth 42 to each other. is doing. The base end of the fork teeth 42 is the front end of the front fork divided body 41A and the rear end of the rear fork divided body 41B. Each fork tooth 42 has a shape in which the left-right width is narrower than the arrangement interval of the work support members 12a (FIG. 4) of the work support table 12, and the

fork teeth

41A and 41B have the fork teeth 42 formed by the work support member 12a. It is possible to pass up and down. The front and rear fork split

bodies

41A and 41B have the same left and right array of fork teeth 42. Each fork tooth 42 is made of, for example, a metal square pipe.

As shown in FIGS. 9A and 9B, each fork tooth 42 is provided with a brush 43 having a hair tip facing upward, and the plate material work W is supported and held by this brush 43 from below. The brush 43 has a plurality of bundles 43b of resin fibers 43a. In the case of this embodiment, two bundles 43b of resin fibers 43a are arranged along the longitudinal direction for each fork tooth 42. Thus, when the brush 43 has a configuration in which a plurality of bundles 43b of resin fibers 43a are arranged, it is easy to implant the resin fibers 43a into the fork teeth 42. Moreover, it is easy to arrange the lengths of the hair ends of the resin fibers 43a. Furthermore, the number of the resin fibers 43a can be reduced compared to the case where the resin fibers 43a are uniformly implanted over the entire surface of the fork teeth 42, and the resin fibers 43a can be manufactured at a low cost.

Further, as shown in FIG. 9B, the fork teeth 42 are configured such that a wooden brush implant 42 is accommodated inside a metal outer shell 42a having a C-shaped cross section that opens upward, and the brush implant 42b includes a brush. A bundle 43b of 43 resin fibers 43a is implanted. In this way, the work holding fork 41 can be reduced in weight by making the brush implant 42 made of wood.

6 to 8, the fork divided

bodies

41A and 41B of the work holding fork 41 are attached to the front and rear fork frames 45, respectively. The front and rear fork frames 45 are a pair of left and right front and rear frame portions 45a that are supported to be slidable in the front and rear direction with respect to the head frame 34a, and upper and left and right that are fixed to the ends of the front and rear frame portions 45a. It consists of a frame portion 45b, a plurality of upper and lower frame portions 45c extending downward from the upper left and right frame portions 45b, and a lower left and right frame portion 45d fixed to the lower ends of these upper and lower frames 45c. The base portions of the fork split

bodies

41A and 41B are respectively attached in a fixed state.

The support part 46 of the front and rear frame part 45a of the fork frame 45 with respect to the head frame 34a has a structure shown in FIG. In other words, a plate-like roller support member 47 that is long in the front-rear direction is provided on the upper surface of the head frame 34a, and a pair of upper and lower rollers 48 are supported on the roller support member 47 so as to be rotatable at a plurality of positions in the front-rear direction. Has been. A pair of upper and lower rollers 48 sandwich a guide plate 45aa horizontally projecting from the side surface of the front and rear frame portion 45a. As a result, the front and rear frame portions 45 a of the fork frame 45 are guided to be slidable in the front-rear direction, which is the longitudinal direction of the fork teeth 42. Instead of using the roller 48 as in this example, a linear motion rolling bearing may be used.

As shown in FIGS. 6 and 8, the fork divided

bodies

41A and 41B are slid in the reverse direction so as to be opened and closed by the slide driving means 50 (FIG. 6). The slide drive means 50 is composed of a fluid pressure cylinder, for example. By sliding the respective fork divided

bodies

41A and 41B by the slide drive means 50, the respective fork divided

bodies

41A and 41B have a workpiece holding position Q1 indicated by a chain line in FIG. 8 and a workpiece release position Q2 indicated by a solid line in FIG. Convert between positions. The work release position Q2 is a position deviated to the front and rear outside with respect to the work holding position Q1.

A plurality of stoppers 51 are provided downward from the front and rear end portions of the head frame 34a. When the fork divided

bodies

41A and 41B slide from the workpiece holding position Q1 to the workpiece release position Q2, the stoppers 51 are configured so that the plate workpieces W held on the fork divided

bodies

41A and 41B are moved to the fork divided

bodies

41A and 41B. It is for preventing sliding with 41B. Specifically, the stopper 51 is provided as follows. That is, the position of the lower end of the stopper 51 in the front-rear direction is set to a position slightly in front of the front of the fork teeth 42 of the fork split

bodies

41A, 41B at the work release position Q2, and in the vertical direction, The position is higher than the upper surface of the fork teeth 42 by a dimension equal to or smaller than the thickness of the plate workpiece W.

1 to 3, the carriage 4 is movable in the front-rear direction along the two left and right rails 60 installed on the floor, and from the lift 23 of the work storage device 2 at the rear position of the movement range. A plate work W serving as a raw material is received, and the received plate work W is transferred to the work transfer head 34 of the work unloading device 3 at the front position of the movement range. Delivery of the plate material workpiece W of the loading carriage 4 from the lift 23 is performed by the loading / unloading device (not shown) provided in the lift 23.

At the time of loading the plate work W, the work transfer head 34 holds the plate work W on the loading carriage 4 by the suction pad 40. Then, the workpiece conveyance head 34 moves to the loading / unloading position P2 of the thermal cutting machine 1 by the elevation of the workpiece conveyance head 34 driven by the elevation driving means 36 and the traveling of the traveling body 32 by the traveling driving means 35. The plate work W is transferred to the work support table 12 waiting at the carry-in / out position P2.

The unloading carriage 5 is movable in the front-rear direction along the rail 61 installed on the floor, and receives the processed plate material workpiece W from the workpiece conveying head 34 of the workpiece unloading device 3 at the front position of the movement range. The plate material workpiece W received by the unloading carriage 5 is transported to a storage place provided separately from this thermal cutting processing system, or the unloading carriage 5 moves to the rear position of the movement range and is lifted by the lift 23. It is stored in the work storage device 2. The workpiece transfer head 34 holds and transfers the processed plate material workpiece W by the workpiece holding fork 41 from the loading / unloading position P2 of the thermal cutting machine 1 to the unloading carriage 5.

The unloading of the processed plate material workpiece W by the workpiece unloading device 3 will be described with reference to FIGS. When the processing of the plate workpiece W by the thermal cutting machine 1 is completed and the workpiece support table 12 on which the processed plate workpiece W is placed moves to the loading / unloading position P2, the workpiece unloading device 3 operates as follows. To do.

First, as the traveling body 32 travels, the work transport head 34 is positioned above the work support table 12 positioned at the loading / unloading position P2 (FIG. 11A). Before the workpiece support table 12 on which the processed plate material workpiece W is placed moves to the loading / unloading position P2, the workpiece conveyance head 34 may wait in advance above the loading / unloading position P2. Next, the fork split

bodies

41A and 41B are slid to the workpiece release position Q2 so that the workpiece holding forks 41 are opened by driving the slide driving means 50, and further, the workpiece holding is held by driving the lifting / lowering driving means 36. The work transport head 34 is lowered so that the fork 41 is at a height position lower than the upper surface of the work support table 12 (FIG. 11B).

Next, the fork split

bodies

41A and 41B are slid to the work holding position Q1 so that the fork split

bodies

41A and 41B of the work holding fork 41 are closed by driving the slide drive means 50. The fork teeth 42 of the fork split

bodies

41A and 41B are inserted between the work support members 12a of the work support table 12 on which the processed plate work W is placed (FIG. 11C).

In this state, the work holding head 34 is lifted with respect to the traveling body 32 by driving the lifting drive means 36. As a result, the fork split

bodies

41A and 41B rise while the fork teeth 42 pass between the workpiece support members 12a, and the plate work on the work support table 12 is supported by the work holding fork 41 including the pair of fork split

bodies

41A and 41B. Scoop up and pick up W (FIG. 11D).

When the processed plate material workpiece W is picked up by the workpiece holding fork 41 as described above, the traveling body 32 travels and the workpiece transport head 34 is moved above the unloading destination P3, that is, the unloading carriage 5 stopped at the predetermined position. Position (FIG. 12 (A)). Then, the work holding head 34 is lowered with respect to the traveling body 32 by driving the elevating drive means 36 so that the work holding fork 41 is slightly higher than the unloading carriage 5 (FIG. 12B).

Next, the fork divided

bodies

41A and 41B slide toward the workpiece release position Q2 so that the fork divided

bodies

41A and 41B of the work holding fork 41 are opened by driving the slide driving means 50 (see FIG. 12 (C)). At this time, the plate work W is also slid by being connected to one of the fork divided

bodies

41A and 41B. However, the stopper 51 prevents the plate material workpiece W from sliding with the fork divided

bodies

41A and 41B over a certain amount. Pulled out. As a result, the plate work W falls downward and is transferred to the transport carriage 5 (FIG. 12D).

Since the plate work W is supported by the brush 43 on each of the fork split

bodies

41A and 41B of the work holding fork 41, the fork split

bodies

41A and 41B slide to the work release position Q2 in the process of FIG. Sometimes, the plate work W does not directly rub against the fork teeth 42 of the fork split

bodies

41A and 41B. Since the resin-made brush 43 is softer than the plate material workpiece W made of a steel plate or the like, even if the plate material workpiece W and the brush 43 rub against each other, the plate material workpiece W is not damaged. Further, if the plate material workpiece W is supported by the brush 43, the entire back surface of the plate material workpiece W can be evenly supported. Therefore, even if the plate material workpiece W has a punch hole that is a cut mark of the product W1 (FIG. 3). The fork split

bodies

41A and 41B can be smoothly pulled out without being caught by the above-mentioned hole. Therefore, the transfer of the plate work W from the work holding fork 41 to the unloading carriage 5 can be performed satisfactorily.

Further, since the work holding fork 41 is divided into a pair of fork divided

bodies

41A and 41B, and the fork divided

bodies

41A and 41B slide in opposite directions so as to open and close each other, the entire work holding fork is integrated. Compared to the slide distance of the workpiece holding fork when sliding in the direction (not shown), the slide distance when the fork divided

bodies

41A and 41B are slid in the opposite direction and pulled out is about ½. be able to. Therefore, it is possible to shorten the time required to transfer the plate work from the work holding fork 41 to the unloading cart 5 that is the unloading destination.

In this embodiment, the work holding fork 41 includes a pair of fork divided

bodies

41A and 41B, but the work holding fork 41 may not be divided. In that case, the work holding fork 41 is slid in one direction to change the position between the work holding position located above the carry-out destination and the work release position deviated from the work holding position.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily assume various changes and modifications within the obvious scope by looking at the present specification. Accordingly, such changes and modifications are to be construed as within the scope of the invention as defined by the appended claims.

DESCRIPTION OF SYMBOLS 1 ... Thermal cutting machine 2 ... Work storage apparatus 3 ... Work carry-out apparatus 5 ... Unloading cart 12 ... Work support table 12a ... Work support member 32 ... Traveling body 34 ... Work conveyance head 34a ... Head frame (elevating body)
36: Elevating drive means (elevating drive means)
41 ... Work holding

forks

41A, 41B ... Fork divided body 42 ... Fork teeth 43 ... Brush 43a ... Resin fiber 43b ... Bundle 50 ... Slide driving means 51 ... Stopper P3 ... Unloading destination Q1 ... Work holding position Q2 ... Work release position W ... Plate work

Claims

A workpiece unloading device for unloading a plate workpiece that has been thermally cut from a thermal cutting machine equipped with a workpiece support table having a plurality of sword-shaped or sawtooth workpiece support members, to the outside of the thermal cutting machine,
A traveling body capable of traveling between an upper position of the work support table and an upper position of a carry-out destination that is outside the thermal cutting machine;
A lifting body that can be lifted and lowered with respect to the traveling body;
A plurality of fork teeth extending in the direction of the slide are arranged in parallel with the lifting body so as to be slidable in a horizontal direction intersecting the traveling direction of the traveling body, and can pass between the workpiece support members. A work holding fork;
A brush that holds the plate work and is provided with the bristles facing upward on each of the fork teeth,
Elevating drive means for raising the elevating body so that the work holding fork passes from below to above the work support surface of the work support table;
Slide driving means for sliding the work holding fork to a work release position that is disengaged from a work holding position located above the carry-out destination;
A stopper that prevents the plate workpiece held on the workpiece holding fork from sliding with the workpiece holding fork when the workpiece holding fork slides to the workpiece release position;
A workpiece unloading device for a thermal cutting machine equipped with
2. The thermal cutting machine according to claim 1, wherein the work holding fork is divided into a pair of fork split bodies at an intermediate portion in the slide direction, and the fork split bodies slide in opposite directions so as to open and close each other. Work carry-out device.
3. The work conveying apparatus of a thermal cutting machine according to claim 1, wherein the brush is a plurality of bundles of a plurality of resin fibers.