JP2818411B2 - Shearing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a shearing machine. (Conventional technology) Conventionally, a cutting work is performed on a work placed on a work table by cooperation of a fixed lower blade provided at a rear portion of a work table and a movable upper blade mounted on a lower portion of a vertically movable ram. Applying shearing machines are well known. In the shearing machine, the conveyor provided behind the fixed lower blade, in order to avoid interference with the ram when the ram descends,
There is a means for lowering the transport conveyor prior to the lowering operation of the ram. (Problems to be Solved by the Invention) By the way, in the above-described means for lowering the conveyor, the conveyor descends before cutting and lowering the plate material.
The effect of supporting the plate material is inferior, and it is not possible to expect a high cutting accuracy. [Structure of the Invention] (Means for Solving the Problems) As described above, in order to solve the conventional problems, a fixed lower blade is provided on the rear side of a work table provided on a frame,
A ram is provided on the upper part of the frame so as to be movable in the vertical direction, and a movable upper blade for cutting the plate material in cooperation with the fixed lower blade is provided below the ram. In order to avoid the interference between the conveyor and the ram when moving the ram downward, a conveyor is provided to support the plate material during the cutting process and to transport the product cut and separated from the plate material. The frame is configured to be swingable up and down around the swing center on the end side, a crankshaft extending in the horizontal direction is rotatably provided on the frame, and a drive motor for rotating the crankshaft is provided. One end of a first connecting rod is provided at the first eccentric portion of the crankshaft to integrally move the ram with the rotation of the crankshaft. And the other end of the first connecting rod is connected to the ram, and the conveyor is swung up and down by the rotation of the crankshaft. One end of the second connecting rod is rotatably connected, and the other end of the second connecting rod is movably connected to the conveyor, and the ram moves downward to fix the movable upper blade to the movable upper blade. In the non-cutting process before starting the cutting by cooperation of the lower blade, the cutting in which the downward swing of the transport conveyor stops at a very small amount and the ram moves further downward to start the cutting. The eccentric phase of the first eccentric portion and the second eccentric portion are shifted from each other so that the transport conveyor swings largely downward in synchronization with the downward movement of the ram when the start process starts. The features. (Operation) With the above configuration, one sheet material is supported by the work table and the conveyor. Then, the crankshaft is rotated by the drive of the drive motor, and the ram is moved downward via the first connecting rod. Thus, the movable upper blade is moved downward together with the ram, and the plate material can be cut by the cooperation of the movable upper blade and the fixed lower blade. When the ram moves downward due to the rotation of the crankshaft, the conveyor moves downward via the second connecting rod, but the eccentric phase of the first eccentric portion and the second eccentric portion are shifted. With this configuration, in the non-cutting process before starting the cutting by the cooperation of the movable upper blade and the fixed lower blade, the downward swing of the transport conveyor stops at a very small amount. In the cutting process, on the other hand, the conveyor conveys a large swing downward in synchronization with the downward movement of the ram, so that interference between the ram and the conveyor can be reliably avoided. be able to. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Referring to FIG. 4, a work table 27 is provided via a support frame 5 attached to the lower part 3 of the main body frame of the shearing machine 1, and a rear portion of the work table 27 (a right portion in FIG. 4). Has a fixed lower blade 7 attached thereto. A movable upper blade 13 is attached to a lower part of a vertically movable ram 11 guided by a guide roller or the like attached to a part of the upper part 9 of the main body frame with respect to the fixed lower blade 7. The up and down movement of the ram 11 is performed by the up and down movement of a first connecting rod 17 attached to the lower part of the ram 11 via a shaft 15. That is, the upper end of the first connecting rod 17 which is a part of the driving device of the ram 11 is attached to the ram 11 via the shaft 15, and the lower end of the first connecting rod 17 is eccentric to the crankshaft 19, in other words. For example, it is rotatably supported on a first eccentric portion of the crankshaft 19, and one pulley 21 is attached to the crankshaft 19. On the other hand, a drive motor (not shown) is attached to the upper portion 9 of the main body frame, and the other pulley 23 is attached to the drive motor. A belt 25 such as a timing belt is wound around one pulley 21 and the other pulley 23. With the above configuration, when a drive motor (not shown) is driven, the crankshaft 19 is rotated via the pulley 23, the belt 25, and the pulley 21. When the crankshaft 19 is rotated, the first connecting rod 17 moves up and down, and the ram 11
Moves up and down. The movable upper blade 13 moves up and down due to the vertical movement of the ram 11, and the plate material W placed and pressed on the fixed lower blade 7 is cut. Fixed lower blade 7 and movable upper blade in shearing machine 1
A work table 27 on which the plate material W is placed and a transport conveyor 29 for carrying out the plate material W after cutting are provided before and after the processing position at which the plate material W is cut in cooperation with the work piece 13. A plurality of rollers 31 are provided on the work table 27 so as to freely roll in the front-rear direction, thereby facilitating the loading of the plate material W. The conveyor 29 includes a plurality of rollers 33A, 33B, 33C, and a belt 35 wound around each of the rollers 33A, 33B, 33C. That is, the movable conveyor frame 37 is disposed in the lower rear part of the shearing machine 1,
A bracket 39 is provided on the right side of the conveyor frame 37.
Is installed. The roller 33B is supported on the bracket 39 via a rotatable shaft 41. With the above configuration, for example, the shaft 41 is driven by a drive motor (not shown), so that the roller 33B is rotated, and the belt 35 wound around the rollers 33A, 33B, and 33C moves as indicated by an arrow. As the belt 35 moves, the cut plate (product) W is placed on the belt 35 and moved from the left side to the right side. The transport conveyor 29 is an electromagnet belt conveyor, and a support frame 43 having a plurality of electromagnets is provided below the belt 35 for transporting the plate material W so as to extend in the left-right direction in FIG. Is attracted to the belt 35 by an electromagnet and transported. On the right side in FIG.
In FIG. 4, there is provided a back gauge device 45 which is movable in the left-right direction.
The plate W is positioned by abutting the edge of the backing member 47 against the abutting member 47 attached to the tip of the back gauge device 45. A work pressing device 49 is provided on the left side of the ram 11 in FIG. 4 in front, and the upper blade 13 descends with respect to the lower blade 7 by the work pressing member 51 attached to the lower portion of the work pressing device 49. The plate material W is supported before the plate material W is cut. A shooter 53 and a scrap box 55 for accommodating cut materials generated by the cutting process are arranged in a lower rear portion of the lower blade. The upper end of the first connecting rod 17 is attached to a lower part of the ram 11 and is mounted on a shaft 15, and the lower end of the first connecting rod 17 is rotatably connected to a first eccentric part of a crankshaft 19. Further, the left side of the belt 35 of the conveyor 29 in FIG. 4 is moved up and down with the right side shaft 41 as a fulcrum. More specifically, as shown in FIG. 1, FIG. 2 and FIG. 3, the crankshaft 19 is rotatable eccentrically, in other words, rotatable around the second eccentric portion of the crankshaft 19. The lower end of the second connecting rod 57 is rotatably connected. As shown in FIG. 3, the support frame 5
A pair of guide shoes 59A and 59B are attached by a plurality of bolts or the like. The guide members 59A and 59B have guide members.
Reference numeral 61 is mounted to move up and down in a direction perpendicular to the plane of FIG. The guide member 61 is attached to the bolt 63 in the left-right direction in FIG. 2 and the up-down direction in FIG.
The upper end of 57 is installed. As shown in FIGS. 1 and 2, the upper end of the swing frame 65 is attached to the guide member 61 with a plurality of bolts or the like. On the other hand, a roller follower 69 is fitted to the support frame 43 of the conveyor 29 via a U-shaped support block 67, and a bolt 71 is mounted on the roller follower 69. The lower end of the swing frame 65 is mounted on the bolt 71. Incidentally, the belt 25 is, as shown in FIG.
It is guided by guide pulleys 75 and 77 rotatably supported by a shaft 73 attached to the crankshaft 19 and the ram 11. As shown in FIG. 1, the eccentric centers of the first eccentric portion and the second eccentric portion of the crankshaft 19 are 17 s and 57 s, respectively, and slightly deviated from the eccentric centers 17 s and 57 s. The eccentric phase is shifted to the second eccentric part. With the above configuration, the belt 35 stops at a very small displacement until the ram 11 descends and the movable upper blade 13 approaches the plate material W on the work table 27 (until the cutting starts).
Enters the cutting process (after the start of cutting), the crankshaft 19 rotates and descends synchronously via the connecting rods 17, 57, whereby the plate material W is cut. Therefore, the belt 35 is supported by the plate material W until the movable upper blade 13 contacts the plate material W on the fixed lower blade 7, and the weight of the plate material W is prevented from hanging down. Thus, high-precision and high-speed cutting can be performed. The configuration of the shearing machine 1 according to the present embodiment is summarized as follows. That is, a work table provided on the lower part 3 of the main body frame via the support frame 5
27, a fixed lower blade 7 is provided on the rear side, and a ram 11 is provided on the upper part 9 of the main body frame so as to be movable in the vertical direction. A movable upper blade 13 for performing the cutting process is provided, a conveying conveyor 29 for supporting the plate material W at the time of the cutting process and conveying the product cut and separated from the plate material W is provided behind the fixed lower blade 7, and the ram 11 is moved downward. In order to avoid interference between the transport conveyor 29 and the ram 11 when moving the transport conveyor 29, the transport conveyor 29 is configured to be swingable up and down around the swing center on the rear end side, and is horizontally mounted on the lower portion 3 of the main body frame. The crankshaft 19 extended to
A drive motor for rotating the crankshaft 19 is provided. The crankshaft 19 integrally includes a first eccentric portion and a second eccentric portion, and the ram 11 is moved in the vertical direction by the rotation of the crankshaft 19. One end of the first connecting rod 17 is rotatably connected to the first eccentric part in 19 and the other end of the first connecting rod 17 is connected to the ram 11.
And a second connecting rod on the second eccentric part of the crankshaft 19 in order to swing the conveyor 29 up and down by the rotation of the crankshaft 19.
One end of the second connecting rod 57 is rotatably connected, and the other end of the second connecting rod 57 is movably connected to the conveyor 29 via a swing frame 65 or the like, and the ram 11 moves downward. In the non-cutting process before starting cutting in cooperation with the movable upper blade 13 and the fixed lower blade 7, the downward swinging of the conveyor 27 stops in a very small amount, and the ram 11 further moves downward. When starting the cutting start process to start cutting,
The eccentric phase of the first eccentric portion and the second eccentric portion are shifted so that the transport conveyor 29 swings largely downward in synchronization with the downward movement of the ram 11. Next, the operation of the present embodiment is summarized as follows. That is, one plate W is supported by the work table 27 and the conveyor 29. Then, the crankshaft 19 is rotated by the drive of the drive motor, and the ram 11 is moved downward via the first connecting rod 17. Thus, the movable upper blade 13 is moved downward together with the ram 11, and the plate material W can be cut by the cooperation of the movable upper blade 13 and the fixed lower blade 7. When the ram 11 moves downward due to the rotation of the crankshaft 19, the transport conveyor 29 is moved to the second connecting rod.
Although it moves downward through 57, the cutting is started in cooperation with the movable upper blade 13 and the fixed lower blade 7 by arranging the eccentric phase of the first eccentric portion and the second eccentric portion to be shifted. In the non-cutting process before cutting, the downward swinging of the conveyor 29 stops in a very small amount, so that the plate material W can be sufficiently supported by the conveyor 29 during the cutting process, while the ram 11 is further lowered. When the cutting start process starts to start cutting, the conveyor 29 swings greatly downward in synchronization with the downward movement of the ram 11, so that interference between the ram 11 and the conveyor is reliably avoided. can do. As described above, according to the invention of the present embodiment, while reliably avoiding the interference between the ram 11 and the transport conveyor 29, the plate material W can be sufficiently supported by the transport conveyor 29 at the time of cutting, so that high precision Cutting can be performed. [Effects of the Invention] As described above, according to the present invention, while reliably avoiding interference between the ram and the conveyor, the plate material can be sufficiently supported by the conveyor during cutting, so that high-precision cutting can be performed. Can do it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a drive unit showing a main part of the present invention, FIG. 2 is a view taken along the arrow II in FIG. 1, and FIG. 3 is a view taken along a line III-III in FIG. It is sectional drawing along. FIG. 4 is a side view of the shearing machine of one embodiment embodying the present invention. 1 ... Shearing machine, 7 ... Fixed lower blade 11 ... Ram, 13 ... Movable lower blade 17 ... First connecting rod, 19 ... Pulley 27 ... Work table, 29 ... Conveyer 35 ... Belt , 57 ... second connecting rod 61 ... guide member, 65 ... swing frame

Claims (1)

(57) [Claims] A fixed lower blade is provided on the rear side of the work table provided on the frame, and a ram is provided on the upper portion of the frame so as to be movable in a vertical direction. When providing a movable upper blade that performs cutting processing, providing a conveyor that transports a product cut and separated from the plate material while supporting the plate material at the time of cutting the fixed lower blade backward, and moving the ram downward. In order to avoid interference between the conveyor and the ram, the conveyor is configured to be able to swing up and down around the swing center on the rear end side, and the crankshaft extending horizontally to the frame is rotatable. A drive motor connected to the crankshaft, the crankshaft integrally including a first eccentric portion and a second eccentric portion, and a crank for rotating the ram in a vertical direction by rotation of the crankshaft. One end of the first connecting rod is rotatably connected to the first eccentric part of the rank shaft, the other end of the first connecting rod is connected to the ram, and the conveyor is vertically moved by rotation of the crankshaft. In order to swing in the direction, one end of the second connecting rod is rotatably connected to the second eccentric portion of the crankshaft, and the other end of the second connecting rod is movably connected to the conveyor. In the non-cutting process before the ram moves downward and starts cutting by the cooperation of the movable upper blade and the fixed lower blade, the downward swing of the transport conveyor stops with a very small amount. When the ram moves further downward and enters the cutting start step to start cutting, the transport conveyor swings greatly downward in synchronization with the downward movement of the ram. A shearing machine comprising a first eccentric portion and a second eccentric portion having different eccentric phases.