A tool for raising the seams of corrugated metal roofs, and a device for raising the seams using the same.

Abstract

The present invention provides a seam-raising tool that can prevent the generation of cutting chips. The present invention also provides a seam-raising device that utilizes the seam-raising tool, which can raise the seams of long seam-folding sections in a short amount of time. [Solution] A seam-raising tool 2 for a corrugated metal roof 4, comprising a shank 20 and a wedge 21, wherein the wedge 21 has a base portion 210 with a width 211 exceeding the width of the middle seam 41 and a vertical dimension 212 less than the vertical distance between the upper bottom portion 410 and the middle end 412 of one web of the middle seam 41, a cutting edge 213 at the tip of the wedge 21 with a cross-sectional shape that can be driven between the middle vertical plate 411 of the middle seam 41 and the outer end 422 of the outer seam 42, an outer seam horizontal unfolding portion 22 in which the horizontal width of the cross section perpendicular to the axis connecting the cutting edge 213 and the base portion 210 of the wedge 21 gradually increases from the cutting edge 213 to the base portion 210, and an outer seam vertical unfolding portion 23 in which the vertical thickness of the cross section perpendicular to the axis connecting the cutting edge 213 and the base portion 210 of the wedge 21 gradually increases from the cutting edge 213 to the base portion 210.

Description

Technical Field

[0001] The present invention relates to a technique for causing warping of a folded-plate roof made of a metal roofing material, and particularly to a warping tool that can cause warping and decomposition of the warping portion of a warping-fastened folded-plate roof, and a warping device using the same.

Background Art

[0002] The folded plates used for a warping-folded metal roof are generally various plated steel plates or stainless steel plates with a thickness of 0.6 to 1.2 mm. When removing or demolishing the folded-plate roof, the warping-folded portion is cut manually using electric cutting tools, or the warping portion is raised manually using general tools such as a pipe wrench or a dedicated tool such as a warping lifter shown in Patent Document 1 (Japanese Utility Model Laid-Open No. 50-98516) to remove the folded plate.

[0003] In addition, cutting the warping-folded portion using the electric cutting tools has a drawback that the scattering of cutting chips deteriorates the working environment and the surrounding environment. However, as shown in Patent Document 2 (Japanese Patent Laid-Open No. 2014-152443), a box-shaped outer wall body having an opening on the lower surface and at least a transparent wall on the upper surface, a shape conforming to the upper shape of the folded-plate roof, a closing plate provided at the lower edge of the outer wall body, and a glove provided inside the outer wall body and fitted into a glove mounting hole formed in the outer wall body at the mouth portion. With the development of the box for dismantling the folded-plate roof, a large-scale operation of covering the entire roof with a covering material is not required.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, raising the seams of the thick and long corrugated metal roofs by hand using the aforementioned general tools and seam-raising devices is extremely labor-intensive. This has the drawback that when shortening the construction period or working more efficiently is required, it becomes necessary to rely on a large workforce.

[0006] In view of these circumstances, the present invention provides a seam-raising tool that can prevent the generation of cutting chips without using cutting tools. The present invention also provides a seam-raising device that utilizes the seam-raising tool, which can raise the seams of long seam-folding sections in a short time without mobilizing a large number of personnel. [Means for solving the problem]

[0007] The present invention relates to a seam fastening portion of a corrugated metal roof, comprising a shank and a wedge extending from the shank, wherein the wedge is joined to the upper bottom of one web and the upper bottom of the other web, and the wedge has an intermediate vertical plate rising from the upper bottom of one web and an intermediate end bent toward the upper bottom of one web from the intermediate vertical plate, and an outer seam rising from the upper bottom of the other web and an outer end extending from the outer vertical plate and wrapped around the intermediate seam, wherein the width exceeds the width of the intermediate seam, and the intermediate seam The present invention provides a seam-raising tool for a corrugated metal roof, comprising: a base portion having a vertical dimension less than the vertical distance between the upper bottom and middle end of one of the webs; a cutting edge at the tip of the wedge with a cross-sectional shape that can be driven between the middle vertical plate of the middle seam and the outer end of the outer seam; an outer seam horizontal expansion portion in which the horizontal width of the cross section perpendicular to the axis connecting the cutting edge and the base of the wedge gradually increases from the cutting edge to the base; and an outer seam vertical expansion portion in which the vertical thickness of the cross section perpendicular to the axis connecting the cutting edge and the base of the wedge gradually increases from the cutting edge to the base.

[0008] The shank supports the base of the wedge with sufficient strength to withstand the seam-raising of the seam-fastening portion. The shank allows the seam-raising tool to be detachably attached to the holding portion of a tool holder which is part of the seam-raising device. The shank can be integrated with the wedge, or the shank and the wedge can be manufactured as separate parts, and the base of the wedge can be attached to the shank to integrate them. The cross-section of the shank perpendicular to the extension direction of the wedge can be made to match the width and length of the base of the wedge. The shank has a recessed portion or stepped portion on its bottom wall that fits with the holding portion, so that when the shank is attached to the holding portion, the bottom surface of the holding portion and the bottom surface of the shank are flush, allowing for smoother sliding on one of the web bottom portions.

[0009] The cutting edge of the wedge is driven between the central vertical plate of the central seam and the outer end of the outer seam, creating a gap between the central vertical plate of the central seam and the outer end of the outer seam into which the wedge can advance. The cutting edge can have an I-shape in the axial direction of the wedge. The cutting edge creates a gap between the central vertical plate of the central seam and the outer end of the outer seam, and between the upper bottom of one web and the outer end of the outer seam into which the wedge can advance. The cutting edge can have an L-shape in the axial direction of the wedge.

[0010] The horizontal outer seam deployment section operates as follows: when the wedge drives its cutting edge between the central vertical plate of the inner seam and the outer end of the outer seam and moves along the seam tightening section in the direction of the folded sheet metal, it pushes open the outer end of the outer seam from the central vertical plate of the inner seam to the base, exceeding the width of the inner seam. The horizontal outer seam deployment section can be set to an inclination angle that gradually increases the horizontal thickness of the cross section perpendicular to the axis of the wedge, from the cutting edge to the base. When the wedge is approximately 60 mm long, the inclination angle of the horizontal outer seam deployment section with respect to the vertical plane can be 15 to 25°, preferably around 20°. If the inclination angle of the horizontal outer seam deployment section is set to less than 15°, the wedge needs to be made longer, which leads to an increase in the size of the seam-opening tool. If it exceeds 20°, the resistance to deforming the outer end of the outer seam increases, which may worsen workability.

[0011] The outer seam vertical deployment section is configured such that, as the wedge drives its cutting edge between the central vertical plate of the inner seam and the outer end of the outer seam and advances in the flow direction along the seam tightening section, it pushes open the outer end of the outer seam from the upper bottom of one web to just below the vertical distance between the upper bottom of one web and the middle end of the inner seam, from the cutting edge to the base. The outer seam vertical deployment section can be configured such that the vertical dimension between the upper and lower ends of the cross section perpendicular to the axis of the wedge gradually increases from the cutting edge to the base. When the wedge is approximately 60 mm long, the inclination angle of the outer seam vertical deployment section with respect to the horizontal plane can be 5 to 17°, preferably around 12°. If the inclination angle of the outer seam vertical deployment section is set to less than 5°, the wedge needs to be set to a longer length, which leads to an increase in the size of the seam raising tool. If it exceeds 17°, the resistance to deforming the outer end of the outer seam increases, which may worsen workability. As shown in the embodiment described later, the vertical dimension of the outer seam vertical deployment section can be gradually increased downwards from the cutting edge to the base end, or it can be gradually increased upwards.

[0012] The present invention provides a seam-raising tool in which the horizontal seam-raising section and the vertical seam-raising section have wall surfaces that contact the seams between them, and these surfaces are curved in a concave shape toward the outer end of the seam.

[0013] The concave curved surface connects the horizontally unfolded outer seam section and the vertically unfolded outer seam section. The concave curved surface allows the cutting edge to be driven between the central vertical plate of the central seam and the outer end of the outer seam, and as the wedge advances along the seam tightening section in the direction of the folded sheet metal flow, the outer end of the outer seam can be pushed out more smoothly and continuously in a stepless manner from the cutting edge to the base as it passes. The concave curved surface reduces fluctuations in the pressing or pulling force required to advance the wedge, and can further reduce the load on the drive source. The concave curved surface can be made into a continuous shape in the axial direction of a circular arc shape with a radius set for each cross section perpendicular to the axis of the wedge. The concave curved surface can be made into a continuous shape in the axial direction of an elliptical arc shape with a minor axis radius or major axis radius set for each cross section perpendicular to the axis of the wedge. The concave curved surface prevents stress from concentrating in the corner between the horizontally unfolded outer seam section and the vertically unfolded outer seam section, further enhancing the durability of the seam-raising tool.

[0014] The present invention provides a seam-lifting device that utilizes a seam-lifting tool, comprising a tool holder having a holding portion, a guide frame portion integrated with the holding portion with a retraction gap to avoid interference with the outer seam and the inner seam, and a traction input portion provided on the guide frame portion, wherein the shank of the seam-lifting tool is attached to the holding portion.

[0015] The tool holder mounts the shank of the seam-raising tool, drives the wedge of the seam-raising tool between the central vertical plate of the central seam and the outer end of the outer seam, receives input to the traction input section, and can advance along the seam-fastening section in the direction of the corrugated sheet metal flow. The holding section has a detachable mechanism that allows the shank of the seam-raising tool to be detachably attached. The detachable mechanism can be a clamping mechanism for temporarily fixing the shank, or a combination of multiple mounting holes, screw holes, and screws provided between the holding section and the shank. The mounting holes have counterbores, the screw heads are embedded within the thickness of the holding section, and the contact surface of the holding section with the upper bottom of one of the webs can be smoothed. When the holding section is fitted into the recessed or stepped portion of the shank and integrated, the contact surfaces of the holding section and the shank with the upper bottom of one of the webs can be made flush.

[0016] The guide frame connects the seam-raising tool attached to the holding part and the traction input part with sufficient strength to withstand the traction force. The guide frame secures a retraction gap between itself and the seam-raising tool attached to the holding part to avoid interference with the outer seam and the inner seam. The length of the guide frame can be set to be equal to the length of the wedge, or to about twice the length of the wedge. The retraction gap can be an outer frame shape that does not interfere with the cross-sectional shape of the seam-fastening section, which consists of the outer seam and the inner seam, that is perpendicular to the flow direction of the corrugated sheet.

[0017] The towing input unit receives external input from a drive source such as a winch, and enables the seam-raising tool and the tool holder to be towed and moved toward the tip of the wedge. The towing input unit can be a ring fitting, annular wire, U-ring, carabiner, or hook fitting to which a hook of a winch or the like can be attached.

[0018] Furthermore, the seam-raising device of the present invention can also be configured to rotate rollers, tires, gears, etc., which then travel along the folded sheet metal. In other words, it can be a seam-raising device equipped with a traveling section. The traveling section can be driven by a drive mechanism including a battery or motor, or it can be configured to travel by inputting power from an electric tool. The traveling section can be made self-propelled by gripping any part or area of ​​the seam or by rotating and moving it. The traveling mechanism (self-propelled mechanism) of the seam-raising device can be manufactured as appropriate using known technology.

[0019] The present invention provides a seam lifting device in which the tool holder has a holding portion facing the upper bottom of one of the webs of the middle seam, and the guide frame portion is provided with a posture-maintaining plate facing the other upper bottom of the web of the outer seam. The posture-maintaining plate maintains the posture of the tool holder by contacting the other upper bottom of the web of the outer seam when the tool holder attempts to fall toward the other upper bottom of the web of the outer seam. The posture-maintaining plate can be set to have a width corresponding to the other upper bottom of the web of the outer seam and a length corresponding to the guide frame portion.

[0020] The corrugated metal roof seam lifting tool and seam lifting device using the present invention can target corrugated metal roofs with square seams, half-round seams, double-round seams, etc. [Effects of the Invention]

[0021] The present invention provides a seam-raising tool for corrugated metal roofs and a seam-raising device utilizing the same, which can prevent the generation of cutting chips without using cutting tools. It can also provide a seam-raising device utilizing the aforementioned seam-raising tool that can raise the seams of long seam sections in a short time without mobilizing a large number of personnel. [Brief explanation of the drawing]

[0022] [Figure 1] Three-view drawing showing the seam-opening tool 2 [Figure 2] Three - view drawing showing the warping device 1 using the warping tool 2 [Figure 3] Perspective view showing the usage state of the warping device 1 [Figure 4] Cross - sectional views sequentially showing the state of gradually unfolding the outer end 422 of the outer warping 42 by the warping tool 2 from (a) to (h)

Embodiment for Carrying out the Invention

[0023] Hereinafter, referring to the drawings, the warping tool for the folded - plate roof according to this embodiment and the warping device using the same will be specifically described. In particular, in this embodiment, as shown in FIGS. 3 and 4, the upper base 410 of one web and the upper base 420 of the other web are joined, and the middle vertical plate 411 rising from the upper base 410 of the one web, and the middle end 412 bent toward the upper base 410 side of the one web from the middle vertical plate 411 are included in the middle warping 41, and the outer vertical plate 421 rising from the upper base 420 of the other web, and the outer end 422 extending from the outer vertical plate 421 and wound around the middle warping 41 are included in the outer warping 42. The warping tool 2 is used to warp the warping portion 40 of the folded - plate roof 4, and the warping device 1 using the same is described.

[0024] As shown in FIGS. 1 to 4, the warping tool 2 has a shank 20 and a wedge 21 extending from the shank 20. The wedge 21 has a base 210 with a lateral width 211 exceeding the width of the middle warping 41 and a vertical dimension 212 less than the vertical distance between the upper bottom portion 41 of one web of the middle warping 41 and the middle end 412, a cutting edge 213 with a cross - sectional shape that can be driven between the middle vertical plate 411 of the middle warping 41 and the outer end 422 of the outer warping 42 at the tip of the wedge 21, an outer - warping horizontal expansion portion 22 with a horizontal width in a cross - section perpendicular to the axis connecting the cutting edge 213 and the base 210 of the wedge 21 gradually increasing from the cutting edge 213 to the base 210, and an outer - warping vertical expansion portion 23 with a vertical thickness in a cross - section perpendicular to the axis connecting the cutting edge 213 and the base 210 of the wedge 21 gradually increasing from the cutting edge 213 to the base 210. It is the warping tool 2 for the folded - plate roof 4.

[0025] As shown in Figure 1, the seam-raising tool 2 is made of a metal such as carbon steel or stainless steel, and the shank 20 and the wedge 21 are integrated. The shank 20 is rectangular in shape and has a plurality of screw holes 200 that penetrate vertically. The cross-sectional shape of the shank 20 perpendicular to its axis matches the cross-sectional shape of the base 210 of the wedge 21 (Figure 4h). For example, as shown by the dashed line in Figure 1, the shank 20 has a recessed portion 201 on its bottom wall that fits with the holding portion 30 of the tool holder 3, which will be described later. When the shank 20 is attached to the holding portion 30, the bottom surface of the holding portion 30 and the bottom surface of the shank 20 are flush, allowing for smoother sliding on the bottom portion 410 of one of the webs. The recessed portion 201 can be replaced with a stepped portion that performs a similar function.

[0026] The wedge 21 has a cross-sectional shape that changes along its entire length from the cutting edge 213 to the base 210, as shown in Figures 1(a) to 1(h). As shown in Figures 1(a) and 4(a), the cutting edge 213 has an L-shaped cross-section (a) that is set to a size that allows it to be driven into the gap between the middle end 412 and middle vertical plate 411 of the middle seam 41 and the outer end 422 of the outer seam 42 of the seam fastening portion (corner seam) 40 of the corrugated metal roof 4.

[0027] As shown in Figures 1(h) and 4(h), the base portion 210 has a rectangular cross-sectional shape (h) with a width 211 that exceeds the width of the middle seam 41, and a vertical dimension 212 that is less than the vertical distance between the upper bottom portion 410 and the middle end 412 of one of the webs of the middle seam 41.

[0028] As shown in Figures 1(a) to (h) and Figures 4(a) to (h), the horizontally unfolded outer seam portion 22 has a cross-sectional area perpendicular to the axis connecting the cutting edge 213 and the base 210 of the wedge 21, with the horizontal width gradually increasing from the cutting edge 213 to the base 210 (the width 211). When the length of the wedge 21 is approximately 60 mm, the inclination angle of the horizontally unfolded outer seam portion 22 with respect to the vertical plane can be 15 to 25°, preferably approximately 20°. The horizontally unfolded outer seam portion 22 can be linear, curved with a constant curvature, quadratic, or streamlined from the cutting edge 213 to the base 210 to further reduce frictional resistance.

[0029] The vertically unfolded outer seam portion 23 has a cross-sectional area perpendicular to the axis connecting the cutting edge 213 and the base 210 of the wedge 21, with the vertical thickness gradually increasing from the cutting edge 213 to the base 210 (the vertical dimension 212). When the length of the wedge 21 is approximately 60 mm, the inclination angle of the vertically unfolded outer seam portion 23 with respect to the horizontal plane can be 5 to 17°, preferably approximately 12°. The vertically unfolded outer seam portion 23 can be linear, curved with a constant curvature, quadratic, or streamlined, which can further reduce frictional resistance, from the cutting edge 213 to the base 210.

[0030] As shown in Figures 1(a) to (h) and Figures 4(a) to (h), the horizontally unfolded outer seam section 22 and the vertically unfolded outer seam section 23 can have a concave curved surface section 24 on the wall surface that contacts the outer seam 42 between them, which curves concavely toward the outer end 422 of the outer seam 42. The concave curved surface section 24 can be a circular arc with a constant curvature or a quadratic curve.

[0031] As shown in Figures 1 to 3, the seam lifting device 1 is formed by mounting the seam lifting tool 2 on a tool holder 3. The tool holder 3 has a rectangular plate-shaped holding portion 30 capable of holding the shank 20 of the seam lifting tool 2, a guide frame portion 31 integrated with the holding portion 30 with a retraction gap 310 to avoid interference with the outer seam 42 and the inner seam 41, and a traction input portion 32 provided on the guide frame portion 31.

[0032] The retaining portion 30 has a countersunk mounting hole 301 drilled in it at a position corresponding to the screw hole 200 of the shank 20. The retaining portion 30 has a detachment mechanism 300 for attaching the seam-raising tool 2 by a countersunk screw 302 that is screwed from the mounting hole 301 into the screw hole 200. The seam-raising tool 2 can be mounted so that the end of the retaining portion 30 facing the central vertical plate 411 is aligned with the end of the retaining portion 30 facing the central vertical plate 411 on the same vertical plane. The detachment mechanism 300 can make the bottom surface of the retaining portion 30 that is in contact with the upper bottom portion 410 of one of the webs a smooth surface. The detachment mechanism 300 can be combined with a hexagonal bolt in the countersunk mounting hole 301. The holding portion 30 extends horizontally at the end opposite to the central vertical plate 411 by a dimension that secures the retraction gap 310 of the outer end 422 (outer seam 42).

[0033] The guide frame portion 31 includes an outer vertical frame 311 that rises vertically from the end of the holding portion 30 opposite to the middle vertical plate 411 and has a vertical dimension that secures the retraction gap 310 of the outer end 422 (outer seam 42); an outer horizontal frame 312 that extends horizontally from the upper end of the outer vertical frame 311 to the outer vertical plate 421, securing the retraction gap 310 with the outer end 422 (outer seam 42); and a traction vertical frame 313 that extends vertically upward from the end of the outer horizontal frame 312 that is positioned on the outer vertical plate 421 and has a plurality of attachment holes 314 drilled in it. The horizontal width of the outer horizontal frame 312 can be set to the width of the holding portion 30 plus the width of the retraction gap 310 that allows the middle vertical plate 411 and the outer vertical plate 421 to pass through.

[0034] A traction vertical plate 330, which extends upward from the attitude maintenance plate 33, is joined to the side of the traction vertical frame 313 on the side facing the other upper bottom portion 420 of the web. Multiple attachment holes 314 are drilled in the traction vertical plate 330 at locations that coincide with the traction vertical frame 313. The attitude maintenance plate 33 is positioned at the same height as the holding portion 30 and its bottom surface is in contact with the other upper bottom portion 420 of the web, preventing the seam raising device 1 from falling towards the other upper bottom portion 420 of the web.

[0035] The traction input section 32 consists of a pair of connecting pieces 320 that sandwich the traction vertical frame 313 and the traction vertical plate 330 from the outside in the horizontal direction, and a C-shaped ring 321 with both ends connected to the connecting pieces 320. The connecting pieces 320 have connecting holes 322 corresponding to the mounting holes 314, and bolts and nuts 331 are attached to the mounting holes 314 and the connecting holes 322 to overlap and connect the traction vertical frame 313, the traction vertical plate 330, and the connecting pieces 320. The coupling mechanism 324 consisting of the mounting holes 314, the connecting holes 322, and the bolts and nuts 331 can be replaced with an integrated structure by welding, forging, or casting.

[0036] The ring 321 of the traction input section 32 is a short, vertical cylindrical shape that protrudes from the guide frame section 31 in the same direction as the wedge 21. As shown in Figure 3, recesses 323 are provided at the upper and lower edges of the tip for engagement with wire ropes, hook fittings, etc., thereby further stabilizing the traction direction.

[0037] As shown in Figures 1 to 3, the seam-raising device 1, in which the seam-raising tool 2 is mounted on the tool holder 3, drives the cutting edge 213 of the wedge 21 between the upper bottom portion 410 and the middle vertical plate 411 of the seam-fastening portion 40 at the end of the corrugated roof 4 in the direction of flow and the outer end 422 of the outer seam 42, and connects the wire rope of a winch (drive source) (not shown) to the ring 321 of the traction input portion 32 shown in Figure 3, and applies a traction force in the direction of flow of the corrugated roof 4, as indicated by the dashed arrow.

[0038] As shown by the solid arrow in Figure 3, the wedge 21, which moves in the flow direction of the corrugated metal roof 4 under the influence of the traction force, as shown in Figures 4(a) to (h), the outer seam horizontal deployment section 22 from the cutting edge 213 to the base 210 gradually deploys the outer end 422 of the outer seam 42 horizontally outward from the middle seam 41. The outer seam vertical deployment section 23 also deploys the outer end 422 of the outer seam 42 vertically upward so as to move away from the middle seam 41. The concave curved surface section 24 allows the contact point between the outer end 422 of the outer seam 42, which moves between the outer seam horizontal deployment section 22 and the outer seam vertical deployment section 23, to move with lower friction during the movement of the wedge 21, enabling smoother seam raising and thus reducing the load on the winch (drive source) and wire rope.

[0039] As shown in Figure 4(h), after the wedge 21 has passed through, the outer end 422 of the outer seam 42 of the seam 40 is detached from the middle end 412 of the middle seam 41. After removing the seam raising device 1 from the seam 40, the folded sheet metal of the other web upper bottom 420 can be easily separated by lifting it upward so that it rotates, using the upper end of the middle vertical plate 411 as a pivot point. The separated folded sheet metal of the other web upper bottom 420 can be cut to a transportable length and lifted out by crane. [Industrial applicability]

[0040] This invention can be used in the manufacture and sale of techniques for raising seams on corrugated metal roofs, tools for raising seams on corrugated metal roofs, and devices for raising seams on corrugated metal roofs. [Explanation of symbols]

[0041] 1. Haze-starting device 2. Seam-opening tool 20 Same Shank 200 Same screw hole 201 Same recessed part 21 Same wedge 210 Same base 211 Same width 212 Same vertical dimensions 213 Same cutting edge 22. External horizontal deployment section 23. Outer seam vertical deployment section 24 Concave curved surface part 3 Tool holder 30 Same holding part 300 Same detachable mechanism 301 Adhesion hole 302 Countersunk screw 31 Same guide frame section 310 Same evacuation gap 311 Same outer vertical frame 312 Same outer horizontal frame 313 Same towing vertical frame 314 Same mounting holes (tow vertical frame 313, tow vertical plate 330) 32. Traction input section 320 Same connection piece 321 Same Ring 322 Connection hole 323 same concave part 324 Same coupling mechanism (mounting hole 314, connecting hole 322, bolt and nut 331) 33 Same posture maintenance board 330 Same towing vertical plate 331 Bolts and nuts 4. Corrugated metal roof 40 Same Goby tightening section 41 Same goby 410 Same as above the bottom of the web 411 Same vertical board 412 Middle end 42. Other gobies 420 Same as above the bottom of the other web 421 Same outer vertical plate 422 Outer edge

Claims

1. Shank and, A wedge extending from the aforementioned shank and It has, The aforementioned wedge, In the seam fastening portion of a folded plate roof, in which one web top bottom and the other web top bottom are joined, and the middle seam has a middle vertical plate rising from the one web top bottom and a middle end bent toward the one web top bottom from the middle vertical plate, and the outer seam has an outer vertical plate rising from the other web top bottom and an outer end extending from the outer vertical plate and wrapped around the middle seam, the base portion has a width exceeding the width of the middle seam, and a vertical dimension less than the vertical distance between the upper bottom and middle end of one web top bottom of the middle seam, The tip of the wedge has a cutting edge with a cross-sectional shape that can be driven between the central vertical plate of the central seam and the outer end of the outer seam, The horizontal width of the cross-section perpendicular to the axis connecting the cutting edge and base of the wedge is defined as an outer seam horizontal expansion section that gradually increases from the cutting edge to the base, The vertical thickness of the cross-section perpendicular to the axis connecting the cutting edge and base of the wedge is determined by the outer seam vertical expansion portion which gradually increases from the cutting edge to the base. A tool for raising the seams of corrugated metal roofs.

2. The seam raising tool according to claim 1, wherein the horizontal seam deployment section and the vertical seam deployment section have wall surfaces that contact the seams between them, which are concave curved surfaces that curve concavely toward the outer end of the seams.

3. The holding part, The retaining portion includes a guide frame portion integrated with the outer and inner seams, which secures a retraction gap to avoid interference between them. The traction input section provided on the guide frame and Equipped with a tool holder having A seam-raising device using the seam-raising tool according to claim 1, wherein the shank of the seam-raising tool is attached to the holding part.

4. The crimping device according to claim 3, wherein the tool holder has a holding portion that faces the upper bottom of one of the middle crimps, and the guide frame portion is provided with a posture-maintaining plate that faces the upper bottom of the other of the outer crimps.

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