Long workpiece cutting machine and cutting method

Abstract

To efficiently and stably cut a long workpiece.SOLUTION: A cutter (20) for a long workpiece includes a cutter blade (30) configured to cut a long workpiece (W) extending in an x-direction from one side in a y-direction intersecting the x-direction in a plan view, and an enlarging unit (40) configured to apply a load to a side surface (Wb) of the long workpiece on the other side in the y-direction during operation of the cutter blade to enlarge a Cut portion extending from the one side to the other side of the long workpiece in the y-direction as the cutter blade advances.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cutting machine and a cutting method for a long workpiece, and more particularly to a cutting machine and a cutting method for cutting a long workpiece by cutting into it from the side. [Background technology]

[0002] Pultrusion is a convenient method for producing long, uniformly cross-sectional resin molded bodies. As described in JP 2019-77077 A (Patent Document 1), in the pultrusion method, the molded body is pulled out of a mold by a pull-up device and cut to a predetermined length by a cutter. The cutter continuously cuts the long, rigid workpiece (pultruded body) flowing from the pultrusion device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-77077 A (Patent No. 6611369) Summary of the Invention [Problem to be solved by the invention]

[0004] In order to steadily produce molded bodies by pultrusion or the like, it is necessary to quickly and reliably perform the cutting operation of long workpieces using a cutting machine. Patent Document 1 discloses a vertically movable cutting machine in which a cutting blade moves up and down in the vertical direction in Figure 3. However, such vertically movable cutting machines have limitations not only in terms of cutting efficiency but also in terms of the storage space required to move a large cutting blade up and down when cutting molded bodies with large cross sections.

[0005] One possible solution is to use a horizontally moving cutting machine that cuts into long workpieces from the side, but this can make it difficult to cut long workpieces stably.In particular, when cutting heterogeneous materials such as FRP (fiber reinforced plastic) materials formed by pultrusion or wood, the situation where the long workpiece gets caught in the high-speed rotating blade during cutting can create significant cutting resistance, leading to problems such as scorching or thermal degradation of the material.

[0006] The present invention has been made to solve the above-mentioned problems, and its object is to provide a cutting machine and cutting method that can cut long workpieces efficiently and stably. [Means for solving the problem]

[0007] A cutting machine for long workpieces according to one aspect of the present invention comprises a cutting blade that cuts into a long workpiece that is long in the x direction from one side in the y direction that intersects with the x direction in a plan view, and an expansion means that applies a load to the side of the long workpiece on the other side in the y direction when the cutting blade is operating, thereby expanding the x-direction width of the cut portion extending from one side in the y direction of the long workpiece to the other side as the cutting blade advances.

[0008] Preferably, the expansion means includes a plurality of pressing means for pressing first and second other side portions of the side of the long workpiece on the other side in the y direction that sandwich the workpiece cutting position, and a plurality of receiving means for abutting against first and second one side portions of the side of the long workpiece on one side in the y direction that sandwich the workpiece cutting position when pressed by the pressing means, and receiving the pressing force from the pressing means.

[0009] More preferably, the multiple pressing means include first and second pressing means that are relatively close to the work cutting position and are arranged on both sides of the work cutting position in the x-direction, and the multiple receiving means include first and second receiving means that are provided at positions farther from the work cutting position in the x-direction than the first and second pressing means and are arranged on both sides of the work cutting position in the x-direction.

[0010] The multiple pressing means may further include third and fourth pressing means that are provided at positions farther from the workpiece cutting position than the first and second pressing means and are arranged on both sides of the workpiece cutting position in the x direction. In this case, it is desirable that the pressing forces of the first and second pressing means be set greater than the pressing forces of the third and fourth pressing means.

[0011] The plurality of receiving means may further include third and fourth receiving means that are provided at positions closer to the workpiece cutting position than the first and second receiving means and are arranged on both sides of the workpiece cutting position in the x direction. In this case, it is desirable that the third and fourth receiving means be arranged set back on one side in the y direction from the positions of the first and second receiving means.

[0012] Preferably, the expanding means including a plurality of pressing means and a plurality of receiving means is arranged symmetrically about the workpiece cutting position.

[0013] More preferably, the plurality of receiving means are provided so that the installation positions in the x direction or y direction can be adjusted.

[0014] In an embodiment, the pressing means is constituted by a cylinder, and the receiving means is constituted by a roller.

[0015] A cutting device according to another aspect of the present invention is a cutting device for cutting a long workpiece moving on a conveying path extending in the x direction, and includes the above-mentioned cutting machine for the long workpiece, a base that supports the cutting machine so that it can move back and forth in the x direction, and a moving mechanism that slides the cutting machine in synchronization with the moving speed of the long workpiece. In such a cutting device, it is desirable that the cutting machine has a fixing means for fixing the moving long workpiece in the vertical direction.

[0016] Preferably, the cutting device is disposed downstream of the pultrusion machine, and the long workpiece is a pultruded body.

[0017] A method for cutting a long workpiece according to yet another aspect of the present invention is a method for cutting a long workpiece that is long in the x direction using a cutting machine that cuts the long workpiece with a cutting blade from one side in the y direction that intersects with the x direction in a planar view, characterized in that when the cutting blade is operated, a load is applied to the side of the long workpiece on the other side in the y direction, thereby cutting the long workpiece while expanding the x-directional width of the cut portion extending from one side in the y direction of the long workpiece to the other side.

[0018] In this cutting method, it is desirable to fix the long workpiece moving on a conveying path extending in the x direction to a cutting machine, and cut the long workpiece with a cutting blade while sliding the cutting machine in synchronization with the moving speed of the long workpiece. [Effects of the Invention]

[0019] According to the present invention, a long workpiece can be cut while increasing the width (x-direction width) of the cut portion made by the cutting blade, thereby enabling the long workpiece to be cut efficiently and stably. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a plan view schematically showing a basic configuration of a cutting device according to an embodiment of the present invention. [Figure 2] 1 is a plan view schematically showing an example of the configuration of an expanding unit included in a cutting machine according to an embodiment of the present invention. FIG. [Figure 3] 3 is a cross-sectional view schematically showing an example of the configuration of the magnifying means, taken along line III-III in FIG. 2. FIG. [Figure 4] 1A to 1C are diagrams schematically illustrating a method for cutting a long workpiece using a cutting machine according to an embodiment of the present invention. [Figure 5] 10A and 10B are diagrams schematically illustrating a method for cutting a long workpiece using a cutting machine in a comparative example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and description thereof will not be repeated.

[0022] <Basic configuration of the cutting device> The basic configuration of a cutting device 10 according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a plan view (top view) that schematically shows the basic configuration of the cutting device 10. Note that arrow A in Fig. 1 indicates the conveying direction of the long workpiece W. Also, the direction along the conveying direction of the long workpiece W is indicated as the x direction, and the direction intersecting (orthogonal to) the x direction in plan view is indicated as the y direction. The x direction corresponds to the longitudinal direction of the long workpiece W, and the y direction corresponds to the width direction of the long workpiece W.

[0023] The cutting device 10 is typically located downstream of the pultrusion molding machine and cuts the long workpiece (pultrusion molded body) W formed by the pultrusion molding method. In the pultrusion molding method, a molded body (e.g., an insulating protective plate) formed by sufficiently curing a curable resin by heating within a mold is continuously taken up from the mold by a take-up device 9 and transported downstream. The cutting device 10 is located downstream of the take-up device 9 (pultrusion molding machine) and cuts the long workpiece W moving in one direction to a predetermined length using a cutting machine 20 having a cutting blade 30. The cutting device 10 continuously cuts the long workpiece W moving on the transport path.

[0024] The cutting machine 20 is disposed on a transport path of the long workpiece W continuously discharged from the take-up device 9. The cutting machine 20 is provided so as to be able to move back and forth along the x direction relative to the base 11, which is disposed downstream of the take-up device 9 and extends in the x direction. The cutting machine 10 is provided with a movement mechanism 23 that slides and moves the cutting machine 20 in synchronization with the moving speed of the long workpiece W.

[0025] The movement mechanism 23 is composed of an air cylinder or the like that moves the main body 21 of the cutting machine 20 back and forth in the x direction between a start position close to the take-up device 9 and an end position away from the take-up device 9. The start position corresponds to the position where the long workpiece W is received, and the end position corresponds to the position where the workpiece is discharged after cutting. The cutting blade 30 is supported by a support member (not shown) that is provided integrally with the main body 21 so as to be movable in the y direction.

[0026] The cutting machine 20 is equipped with fixing means 22 for fixing the long workpiece W in the vertical direction to the main body 21. The fixing means 22 is typically configured with upper and lower clamps that sandwich the long workpiece W in the vertical direction. The fixing means 22 are provided on both sides (upstream and downstream) in the x direction of the workpiece cutting position P by the cutting blade 30. Support rollers 12 are provided on both ends of the base 11 in the x direction, and the long workpiece W is supported by the support rollers 12 so that it can be transported and moved. The installation height of the support rollers 12 may be adjustable.

[0027] The cutting blade 30 is provided so as to be movable back and forth along the y direction of the main body 21, and cuts the long workpiece W by cutting into it from one side in the y direction. The cutting blade 30 is a circular saw type cutting blade (see FIG. 3). The cutting blade 30 may be a cutting wheel. In this embodiment, the cutting blade 30 moves straight from a side surface Wa on one side in the y direction of the long workpiece W (hereinafter referred to as "one side surface") to a side surface Wb on the other side in the y direction (hereinafter referred to as "other side surface") while rotating at high speed, thereby cutting the long workpiece W in a vertical cross section perpendicular to the longitudinal direction (axial direction). The workpiece cutting position P forms the straight path of the cutting blade 30.

[0028] The cutting blade 30 is rotated and moved in the y direction by the rotary drive unit 31. By adopting a horizontal movement system in which the cutting blade 30 advances and retreats along the width direction of the long workpiece W in this way, the overall configuration of the cutting machine 20 can be made compact even when cutting a molded object with a relatively large cross section.

[0029] When a horizontal movement cutting method is used, cut portions and uncut portions coexist during the cutting process. Fig. 5 shows a comparative example of the cutting machine 20 in this embodiment. Fig. 5 shows the configuration of the cutting machine 200 as a comparative example, and is a diagram that schematically shows a method of cutting a long workpiece W using the cutting machine 200. Note that in Fig. 5, the cut portion C is exaggerated to make it easier to understand.

[0030] The cutting machine 200, like the cutting machine 20 of this embodiment, has a fixing means 22 composed of upper and lower clamps and a laterally movable cutting blade 30. The cutting machine 200 does not have a means for holding the long workpiece W in the width direction. In this cutting machine 200, when the cutting blade 30 is operated (rotated from one side in the y direction to the other side) as shown in FIG. 5(A), the cutting blade 30 pushes the long workpiece W itself in the direction of travel (the other side in the y direction). Therefore, even if the long workpiece W is fixed by clamping it vertically with the fixing means 22, the long workpiece W shifts in the y direction as shown in FIG. 5(B). As a result, the long workpiece W deforms so as to close the cut portion C (to break at the workpiece cutting position P). This can result in the cutting surface of the long workpiece W (the inner surface of the cut portion C) gripping the cutting blade 30, locking the cutting blade 30 and making it impossible to cut the long workpiece W.

[0031] When a long workpiece W is made of heterogeneous materials such as fiber-reinforced plastic (FRP) or wood, residual stresses are generated inside the workpiece due to factors such as shrinkage after molding (the molded material cools between the mold outlet and the cutter, causing linear expansion distortion due to temperature differences). This internal residual stress is released immediately after cutting. When cutting long workpieces with high cross-sectional rigidity or long workpieces with non-mirror shapes using a horizontally moving cutter, the long workpiece becomes pinched by the high-speed rotating blade during cutting, resulting in high cutting resistance. When cutting resistance is high, frictional heat can cause the material (such as resin) to burn or undergo thermal denaturation. Furthermore, if cutting resistance is too high, the high-speed rotating blade will become unable to rotate. Even if the power of the motor driving the high-speed rotating blade is increased to avoid this situation, the cutting resistance itself remains unchanged, resulting in the aforementioned frictional heat problem.

[0032] Therefore, the cutting machine 20 in this embodiment is provided with an expanding means 40 that expands the width in the x direction (indicated by "Dx" in FIG. 5(A)) of the cut portion C that extends as the cutting blade 30 advances. The expanding means 40 applies a load to the other side surface Wb of the long workpiece W, thereby opening up the cut surface of the long workpiece W. The expanding means 40 will be described in detail below.

[0033] <Overview of the magnification means> Fig. 1 shows a schematic configuration of the expanding means 40. As shown in Fig. 1, the expanding means 40 includes a plurality of pressing means 41 that press the other side surface Wb of the long workpiece W when the cutting blade 30 is in operation, and a plurality of receiving means 42 that come into contact with one side surface Wa of the long workpiece W when pressed by the pressing means 41 and receive the pressing force from the pressing means 41. Note that the receiving means 42 does not need to be in contact with the one side surface Wa of the long workpiece W in an unloaded state (an intentional gap may be provided between the receiving means 42 and the long workpiece W).

[0034] The multiple pressing means 41 press the first and second other side surface portions Wb1 and Wb2 of the other side surface Wb of the long workpiece W, respectively, which are located on either side of the workpiece cutting position P. Specifically, as shown in FIG. 1, at least one pressing means 41 pressing the first other side surface portion Wb1 and at least one pressing means 41 pressing the second other side surface portion Wb2 are provided. Note that, although an example is shown here in which the first other side surface portion Wb1 is the side surface portion upstream of the workpiece cutting position P and the second other side surface portion Wb2 is the side surface portion downstream of the workpiece cutting position P, the reverse may also be true. The same applies to the first and second one side surface portions Wa1 and Wa2 described below.

[0035] The plurality of receiving means 42 are arranged at positions in contact with (or close to) the first and second one-side side portions Wa1, Wa2 of one side surface Wa of the long workpiece W, which sandwich the workpiece cutting position P, and receive the pressing force from the pressing means 41. As shown in FIG. 1, at least one receiving means 42 in contact with the first one-side side portion Wa1 and at least one receiving means 42 in contact with the second one-side side portion Wa2 are provided.

[0036] It is desirable that the pressing means 41 be configured by a cylinder capable of adjusting the pressing force. The configuration of the receiving means 42 is not particularly limited, but as an example, it is configured by a roller.

[0037] <Specific configuration example of enlargement means> A specific configuration example of the expanding means 40 will be described with reference to Figures 2 and 3. Figure 2 is a plan view schematically showing a configuration example of the expanding means 40 provided in the cutting machine 20 according to an embodiment of the present invention. Figure 3 is a cross-sectional view schematically showing the configuration example of the expanding means 40, showing a cross section along line III-III in Figure 2.

[0038] 2, the expanding means 40 in this embodiment includes four cylinders 51 to 54 as the pressing means 41 and four rollers 61 to 64 as the receiving means 42. The four cylinders 51 to 54 are arranged at intervals from one another in order from the side closest to the take-up device 9. Similarly, the four rollers 61 to 64 are arranged at intervals from one another in order from the side closest to the take-up device 9.

[0039] (About the cylinder) As shown in FIG. 2, cylinders 51 and 52 are arranged upstream of workpiece cutting position P, and cylinders 53 and 54 are arranged downstream of workpiece cutting position P. Cylinders 52 and 53 are provided in a position relatively close to workpiece cutting position P. Cylinders 51 and 54 are provided in a position farther away from workpiece cutting position P than cylinders 52 and 53. It is desirable that the four cylinders 51 to 54 be provided symmetrically with respect to workpiece cutting position P.

[0040] In the following description, when it is necessary to distinguish between the cylinders 52, 53 closer to the workpiece cutting position P and the cylinders 51, 54 farther from it, the former will be referred to as the "central cylinders 52, 53" and the latter will be referred to as the "end cylinders 51, 54." A fixing means 22 is arranged between the central cylinder 52 (53) and the end cylinder 51 (54).

[0041] 2 and 3, each of the cylinders 51 to 54 adjusts the position of a reciprocating member (piston) having a contact plate 55 at its tip, thereby adjusting the load (pressing force) applied to the other side surface Wb of the workpiece W. The cylinders 51 to 54 are, for example, air cylinders.

[0042] It is desirable that the pressing force of the central cylinders 52, 53 be set greater than the pressing force of the end cylinders 51, 54. The central cylinders 52, 53 constitute the first and second pressing means, and the end cylinders 51, 54 constitute the third and fourth pressing means.

[0043] (About Laura) As shown in FIG. 2, rollers 61 and 62 are arranged upstream of workpiece cutting position P, and rollers 63 and 64 are arranged downstream of workpiece cutting position P. Rollers 62 and 63 are provided in a position relatively close to workpiece cutting position P. Rollers 61 and 64 are provided in a position farther away from workpiece cutting position P than rollers 62 and 63. It is desirable that the four rollers 61 to 64 are also provided symmetrically with respect to workpiece cutting position P. The rotation axes of rollers 61 to 64 extend in the vertical direction. Rollers 61 to 64 rotate (spin on their own axes) due to frictional force with one side surface Wa of the long workpiece W.

[0044] In the following description, when it is necessary to distinguish between the rollers 62, 63 closer to the workpiece cutting position P and the rollers 61, 64 further away, the former will be referred to as "central rollers 62, 63" and the latter will be referred to as "end rollers 61, 64." A fixing means 22 is disposed between the central roller 62 (63) and the end roller 61 (64).

[0045] In this embodiment, the four rollers 61 to 64 are arranged at positions facing the four cylinders 51 to 54, respectively. Specifically, with respect to the x-direction position, at least a portion of roller 61 is arranged within the width range of the abutment plate 55 of cylinder 51, and at least a portion of roller 62 is arranged within the width range of the abutment plate 55 of cylinder 52. Similarly, at least a portion of roller 63 is arranged within the width range of the abutment plate 55 of cylinder 53, and at least a portion of roller 64 is arranged within the width range of the abutment plate 55 of cylinder 54.

[0046] In this way, in terms of position in the x direction, the end rollers 61, 64 are provided at positions farther from the workpiece cutting position P than the central cylinders 52, 53, and constitute first and second receiving means. The central rollers 62, 63 constitute third and fourth receiving means.

[0047] 2, the positions of the central rollers 62, 63 are set back to one side in the y direction from the positions of the end rollers 61, 64. In other words, in an unloaded state, the end rollers 61, 64 contact one side Wa (first and second one side portions Wa1, Wa2) of the long workpiece W, whereas the central rollers 62, 63 do not contact one side Wa of the long workpiece W. By setting back the central rollers 62, 63 and providing a gap S between them and the one side Wa, a pressing allowance for the central cylinders 52, 53 can be secured.

[0048] It is desirable that the installation positions of the rollers 61 to 64 in the y direction be adjustable (for example, manually) according to the width dimension of the long workpiece W. The installation positions of the rollers 61 to 64 in the x direction may also be adjustable. It is more desirable that the x direction positions of the end rollers 61, 64, which function as "fulcrums" when a load is applied to the long workpiece W, be adjustable (for example, manually) according to the type and size of the long workpiece W.

[0049] In this embodiment, all elements of the expanding means 40 (plurality of cylinders 51-54 and plural rollers 61-64) are arranged to be line-symmetrical about the workpiece cutting position P. Therefore, when cutting with the cutting blade 30, the long workpiece W can be deformed in a well-balanced manner about the workpiece cutting position P.

[0050] <How to cut long workpieces> Further referring to FIG. 4, a method for cutting a long workpiece W executed by the cutting device 10 including the cutting machine 20 will be described.

[0051] First, the fixing means 22 is activated at the starting position to fix the long workpiece W in the vertical direction. Next, the moving mechanism 23 is activated to move the cutting machine 20 from the starting position to the end position in synchronization with the moving speed of the long workpiece W. Note that, in the initial stage before the long workpiece W is fixed by the fixing means 22, it is desirable that the abutment plate 55 of the cylinders 51-54 is retracted (out of contact with the other side Wb of the long workpiece W). In the initial state, the end rollers 61, 64 are in contact with one side Wa of the long workpiece W, but because the entire cutting machine 20 is moving synchronously with the long workpiece W, the end rollers 61, 64 do not normally rotate. The center rollers 62, 63 are out of contact with one side Wa of the long workpiece W and do not rotate.

[0052] When the cutting stage using the cutting blade 30 begins, each cylinder 51-54 pushes out a reciprocating member (piston) to press the contact plate 55 against the other side surface Wb of the long workpiece W. Approximately simultaneously with (or immediately before or after) the pressing of the contact plate 55, the rotation drive unit 31 moves the cutting blade 30 from one side in the y direction to the other while rotating it at high speed. As shown in Figures 4(A) and (B) , the cut portion C formed by the cutting blade 30 extends from one side to the other side in the y direction of the long workpiece W as the cutting blade 30 advances.

[0053] As the cutting blade 30 cuts into the long workpiece W while pushing it in the direction of travel, the long workpiece W is pushed to the other side in the y direction (the direction of travel of the cutting blade 30), but in this embodiment, the other side surface Wb of the long workpiece W is pressed with a relatively strong force by the central cylinders 52, 53, and the central rollers 62, 63 are positioned further back than the end rollers 61, 64. For this reason, as shown in Fig. 4(B), the central portion of the long workpiece W (near the workpiece cutting position P) is allowed to displace in the direction opposite to the direction of travel of the cutting blade 30 (one side in the y direction), and as the cutting blade 30 advances, the x-direction width "Dx" of the cut portion C of the long workpiece W expands (the cut surface opens).

[0054] Specifically, the width D1 of the end gradually becomes larger than the width D2 of the tip of the cut portion C (corresponding to the thickness of the cutting blade 30). The width D1 of the end corresponds to the distance between the first one side surface Wa1 and the second one side surface Wa2. Since the long workpiece W is displaced in the direction opposite to the direction of travel of the cutting blade 30, with the end rollers 61, 64 as fulcrums, the angle formed by the first one side surface Wa1 between the cut portion C and the end roller 61 and the second one side surface Wa2 between the cut portion C and the end roller 64 in a plan view is greater than 180 degrees. The other side surface Wb of the long workpiece W is gently curved (concave) around the work cutting position P in a plan view.

[0055] When cutting of the long workpiece W is completed, the fixing means 22 is released. As a result, a workpiece (product) of a certain length cut off from the continuous long workpiece W is discharged downstream. Thereafter, the cutting machine 20 is returned from the end position to the start position by the moving mechanism 23, and the above-mentioned cutting operation is repeated.

[0056] As described above, the cutting machine 20 according to this embodiment can cut the long workpiece W while increasing the width of the notch C in the long workpiece W in the x direction. That is, when the cutting blade 30 is in operation, the distance (D1) between the first and second one-side side portions Wa1, Wa2 of the long workpiece W divided by the notch C can be increased as the cutting blade 30 advances. Therefore, it is possible to prevent the cutting blade 30 from biting into the workpiece W as in the comparative example shown in FIG. 5. As a result, the cutting resistance is reduced compared to the comparative example, which prevents scorching or thermal denaturation of the material due to frictional heat and allows the cutting blade 30 to advance smoothly.

[0057] Furthermore, the end rollers 61, 64 arranged symmetrically on the left and right function as "starting points" that generate a reaction force against the pressing force of the central cylinders 52, 53 (and the end cylinders 51, 54), preventing the long workpiece W from being distorted asymmetrically during cutting. As a result, the long workpiece W can be cut accurately and stably. When actuated by the cutting blade 30, the rollers 61 to 64 may rotate slightly as the long workpiece W is displaced.

[0058] Furthermore, according to this embodiment, it is possible to prevent the cutting blade 30 from getting caught without replacing the electric motor constituting the rotation drive unit 31 with a high-performance one, so there is no need to increase costs or make the equipment larger. Furthermore, the expanding means 40 can be retrofitted to existing cutting machines, making it highly versatile.

[0059] 2, rollers (hereinafter referred to as "auxiliary rollers") 71, 72 that contribute to centering the long workpiece W may also be provided on the other side surface Wb of the long workpiece W. Specifically, one or more (e.g., two) auxiliary rollers 71 that contact the first other side surface portion Wb1 and one or more (e.g., two) auxiliary rollers 72 that contact the second other side surface portion Wb2 may be provided. It is desirable that the auxiliary rollers 71, 72 are also provided symmetrically with respect to the workpiece cutting position P.

[0060] When not cutting, both side surfaces Wa, Wb of the long workpiece W are always sandwiched (in contact) between the rollers 61, 64 on one side surface Wa and the auxiliary rollers 71, 72 on the other side surface Wb, thereby enabling proper centering of the long workpiece W before and after cutting. Also, the cutting machine 20 can be moved back and forth while centering the long workpiece W.

[0061] <Modification> In this embodiment, an example has been described in which the pressing means 41 includes four cylinders 51 to 54 and the receiving means 42 includes four rollers 61 to 64, but it is sufficient that the pressing means 41 includes at least a pair of central cylinders 52, 53 and the receiving means 42 includes a pair of end rollers 61, 64 (see Figure 1).

[0062] Furthermore, although an example has been shown in which the pressing means 41 is configured by a cylinder, the present invention is not limited to such an example, and it is sufficient if it has at least a member equivalent to the abutment plate 55. Such a member may be a fixed block (a wall portion whose position in the y direction is fixed) that rises upward from the main body 21 (not shown). In this case, by rounding or chamfering both corners of the contact surface of the fixed block in the x direction, it is possible to prevent the fixed block from interfering with the relative movement of the long workpiece W.

[0063] Furthermore, although an example has been shown in which the receiving means 42 is configured by rollers, the present invention is not limited to such an example and may be configured by a non-rotating fixed member (for example, a fixed plate, etc.). In this case, the peripheral wall portion 90 on the outlet side of the take-up device 9 shown in Fig. 1 may configure a part (a part that serves as a fulcrum) of the receiving means 42. The receiving means 42 may include at least a pair of receiving means provided on either side of the workpiece cutting position P.

[0064] Furthermore, in this embodiment, the cutting device 10 is disposed downstream of the pultrusion machine, and the long workpiece W is a pultrusion molded body such as an FRP material in which residual stress occurs, but the type of long workpiece W is not important. For example, the long workpiece W may be a metal material (homogeneous material) formed by extrusion or the like.

[0065] In addition, in this embodiment, an example is shown in which the cutting machine 20 is mounted on a cutting device that cuts a long workpiece moving on a conveying path extending in the x direction, but it is also possible to provide the cutting machine 20 as a standalone unit.

[0066] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0067] 9 Take-up device, 10 Cutting device, 20,200 Cutting machine, 22 Fixing means, 30 Cutting blade, 40 Expanding means, 41 Pressing means, 42 Receiving means, 51-54 Cylinder, 61-64 Roller, 71,72 Auxiliary roller, C Cutting portion, P Work cutting position, W Long work.

Claims

1. A cutting blade that cuts into a long workpiece that is long in the x direction from one side in the y direction that intersects with the x direction in a plan view, and cuts the workpiece. A cutting machine for long workpieces, comprising an expansion means for applying a load to the side of the long workpiece on the other side in the y direction when the cutting blade is in operation, thereby expanding the x-direction width of the cut portion extending from one side of the long workpiece in the y direction to the other side as the cutting blade advances.

2. The enlarging means a plurality of pressing means for pressing first and second other side surface portions of the other side surface of the long workpiece in the y direction, the first and second other side surface portions sandwiching the workpiece cutting position; 2. A cutting machine for a long workpiece as described in claim 1, further comprising a plurality of receiving means that, when pressed by the pressing means, abut against first and second one-side side portions of the side of the long workpiece on one side in the y direction that sandwich the workpiece cutting position, and receive the pressing force from the pressing means.

3. the plurality of pressing means include first and second pressing means disposed relatively close to the workpiece cutting position and on both sides of the workpiece cutting position in the x direction, 3. The long work cutting machine according to claim 2, wherein the plurality of receiving means are provided at positions farther from the work cutting position in the x direction than the first and second pressing means, and include first and second receiving means arranged on both sides of the work cutting position in the x direction.

4. the plurality of pressing means further include third and fourth pressing means provided at positions farther from the workpiece cutting position than the first and second pressing means and disposed on both sides of the workpiece cutting position in the x direction, 4. The long workpiece cutting machine according to claim 3, wherein the pressing forces of said first and second pressing means are set to be greater than the pressing forces of said third and fourth pressing means.

5. the plurality of receiving means further include third and fourth receiving means provided at positions closer to the workpiece cutting position than the first and second receiving means and disposed on both sides of the workpiece cutting position in the x direction, 4. The long work cutting machine according to claim 3, wherein the third and fourth receiving means are set back on one side in the y direction from the positions where the first and second receiving means are disposed.

6. 3. The long work cutting machine according to claim 2, wherein said expanding means including said plurality of pressing means and said plurality of receiving means are arranged so as to be symmetrical with respect to said work cutting position.

7. 3. The long work cutting machine according to claim 2, wherein the plurality of receiving means are provided so that the installation positions thereof can be adjusted in the x direction or the y direction.

8. the pressing means is constituted by a cylinder, 2. The long workpiece cutting machine according to claim 1, wherein said receiving means is constituted by a roller.

9. A cutting device that cuts a long workpiece moving on a conveying path extending in an x ​​direction, A long workpiece cutting machine according to any one of claims 1 to 8, a base that supports the cutting machine so that the cutting machine can reciprocate in the x direction; a moving mechanism for sliding the cutting machine in synchronization with the moving speed of the long workpiece.

10. 10. The cutting device according to claim 9, wherein the cutting machine has a fixing means for fixing the moving long workpiece in the vertical direction.

11. The cutting device according to claim 9, wherein the cutting device is disposed downstream of a pultrusion machine, and the long workpiece is a pultruded body.

12. A method for cutting a long workpiece by a cutting machine, in which a long workpiece that is long in the x direction is cut by a cutting blade from one side in the y direction that intersects with the x direction in a plan view, A method for cutting a long workpiece, characterized in that a load is applied to the side of the long workpiece on the other side in the y direction when the cutting blade is operated, thereby cutting the long workpiece while expanding the x-direction width of the cut portion extending from one side of the long workpiece in the y direction to the other side.

13. A long workpiece moving on a conveying path extending in the x direction is fixed to the cutting machine; 12. The method for cutting a long workpiece according to claim 11, wherein the long workpiece is cut by the cutting blade while the cutting machine is slid in synchronization with the moving speed of the long workpiece.

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