Chamfering device

Abstract

To provide a chamfering device, configured simply and downsized, which can chamfer a web over the whole width of the web, while preventing a cutting blade from interfering with the other member.SOLUTION: A chamfering device 1, which chamfers a web 62 of H-section steel 60 constituted of two flanges 61 and the web 62 sandwiched between the two flanges 61, comprises a substrate 10; a fixture 2 that fixes the substrate 10 to the flanges 61 of the H-section steel 60, a cutting blade 53 that is rotationally driven to chamfer the web, and a moving body 20, mounted on the substrate 10, which can reciprocate in a direction along an end face of the web 62. The cutting blade 53 moves together with the moving body 20, which can chamfer the web 62 with the cutting blade 53, over the whole width of the web 62, by moving the moving body 20, in a state where there is no member interfering with the cutting blade 53 being moved, over the whole width of the web 62, and the substrate 10 is fixed to the flanges 61 with the fixture 2.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a chamfering device for chamfering the web of an H-shaped steel.

Background Art

[0002] In a building, a steel frame structure using steel members as main structural members is known. In the steel frame structure, there are some structures in which square steel pipes are joined together to form columns, or H-shaped steels are interposed between square steel pipes to connect the square steel pipes. When an H-shaped steel is interposed between square steel pipes, the end face of the H-shaped steel is welded to the side surface of the square steel pipe to join the H-shaped steel to the square steel pipe.

[0003] As a pre-processing for welding between members, a process called beveling is known. Beveling is a process in which cutting processing such as chamfering is previously performed on the joining members. When the joining members are chamfered, a groove-like depression is formed at the joining portion, and the molten material melts into the depression, thereby enhancing the adhesion of the molten material and ensuring the strength and quality of the welded portion.

[0004] When beveling an H-shaped steel, chamfering is performed by cutting the end face in the longitudinal direction, which is the joining portion. If this operation is performed manually, the processing workability is poor and a great deal of labor is required. For this reason, in Patent Document 1, a steel material processing machine is proposed in which a main body provided with a cutter is self-propelled along a guide rail fixed to the steel material so as to perform accurate beveling or scallop processing with a constant cutting force.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the steel processing machine described in Patent Document 1 was only capable of chamfering the flanges of an H-beam composed of two flanges and a web, and only capable of scalloping (notching) the web. Furthermore, with the structure of the steel processing machine described in Patent Document 1, even if an attempt was made to chamfer the web, the guide rail interfered with the flange, making it impossible to position the cutter opposite the web.

[0007] The present invention aims to solve the aforementioned conventional problems and to provide a chamfering device that can chamfer a web over its entire width without the cutting blade interfering with other components, while achieving a simple structure and miniaturization. [Means for solving the problem]

[0008] To achieve the above objective, the present invention provides a chamfering device for chamfering the web of an H-shaped steel beam, which is composed of two flanges and a web sandwiched between the two flanges, comprising a base body, a fixing device for fixing the base body to the flanges of the H-shaped steel beam, a cutting blade that is rotationally driven to chamfer the web, and a movable body attached to the base body that is reciprocally movable in a direction along the end face of the web, wherein the cutting blade moves integrally with the movable body, there are no members that interfere with the cutting blade while it is moving across the entire width of the web, and by moving the movable body while the base body is fixed to the flanges with the fixing device, the web can be chamfered with the cutting blade across the entire width of the web.

[0009] In the chamfering device of the present invention, it is preferable that a position regulating body is attached to the base body, the position regulating body has a position regulating surface that contacts the plane of the web, and when the base body is fixed to the flange, the position regulating body is positioned so as not to interfere with the moving cutting blade. [Effects of the Invention]

[0010] According to the present invention, the chamfering device can be attached to an H-beam simply by fixing the fastener to the flange of the H-beam, eliminating the need for an installation structure to set the chamfering device on the ground or support columns to hold the chamfering device between itself and the ground. As a result, the chamfering device can be made simpler and more compact, and because the entire structure is a single, self-contained unit, it is easy to handle during transport and installation. In addition, since there are no components that interfere with the cutting blade while it is moving across the entire width of the web, the web can be chamfered without the cutting blade interfering with other components across the entire width of the web.

[0011] Furthermore, a preferred configuration in which a position regulating body is attached to the base allows for position regulating of the chamfering device without the need to add special fixings or mounting devices, resulting in more stable support for the chamfering device and improved accuracy of chamfering by the cutting blade. [Brief explanation of the drawing]

[0012] [Figure 1] A perspective view of an H-shaped steel beam, which is the target of processing by a chamfering device according to one embodiment of the present invention. [Figure 2] A perspective view showing a chamfering device according to one embodiment of the present invention mounted on an H-beam. [Figure 3] A plan view of Figure 1, seen from above. [Figure 4] A perspective view showing the vicinity of a cutting mechanism according to one embodiment of the present invention. [Figure 5] A perspective view showing a chamfering device according to one embodiment of the present invention mounted on an H-beam. [Figure 6] A side view of the vicinity of the cutting mechanism according to one embodiment of the present invention. [Figure 7] A side view of the vicinity of a cutting mechanism according to another embodiment of the present invention. [Figure 8] A perspective view of an H-beam with chamfered edges formed on both the upper and lower ends of the web. [Figure 9] Figure 8 is a perspective view showing one end of the H-shaped steel beam joined to a square steel pipe. [Figure 10] Cross-sectional view along the DD line in Figure 9. [Modes for carrying out the invention]

[0013] The present invention will now be described with reference to the drawings. The present invention is a chamfering device for chamfering the web of an H-shaped steel beam. Figure 1 shows a perspective view of an H-shaped steel beam 60. Figure 1(a) shows the beam before chamfering, and Figure 1(b) shows the beam after chamfering. In Figure 1(a), the H-shaped steel beam 60 is composed of two flanges 61 and a web 62 sandwiched between the two flanges 61. In Figure 1(b) after chamfering, a chamfered portion 63 is formed on the end face of the web 62. The chamfered portion 63 is formed on the upper side of the end face of the web 62, but it is also possible to invert the chamfering device or the H-shaped steel beam 60 to form chamfered portions 63 and 64 on both the upper and lower sides of the end face of the web 62, as shown in Figure 8.

[0014] Figure 2 shows a perspective view of an H-shaped steel beam 60 with a chamfering device 1 according to one embodiment of the present invention attached to it. Figure 3 is a plan view of Figure 1 as seen from above (in the direction of arrow A). The configuration of the chamfering device 1 will be described below with reference to Figures 2 and 3. In Figure 3, the chamfering device 1 is attached to the H-shaped steel beam 60 with a pair of fasteners 2 each sandwiching the flange 61 of the H-shaped steel beam 60.

[0015] The fixing device 2 comprises a flange support 3, a screw shaft 4, a pressing body 5 fixed to one end of the screw shaft 4, a handle 6 fixed to the other end of the screw shaft 5, a nut 7 that screws onto the screw shaft 4, and a nut support 8 to which the nut 7 is fixed. By rotating the handle 6, the pressing body 5 can be moved linearly, and the flange 61 can be sandwiched between the pressing body 5 and the flange support 3. The fixing device 2 can be any device that can fix the chamfering device 1 to the flange 61 of the H-shaped steel 60, and is not limited to the configuration shown in Figure 3.

[0016] In FIG. 3, the flange support 3 that constitutes the fixture 2 is fixed to the mounting body 9. The mounting body 9 is fixed to the base body 10 by the mounting screw 18. Thus, the fixture 2 is fixed to the base body 10. If a number of holes for tightening the mounting screw 18 are provided in the base body 10, the mounting position of the fixture 2 on the base body 10 can be selected, and the chamfering device 1 can also be mounted on H-shaped steels 60 of different widths. Also, if the insertion hole of the mounting screw 18 of the mounting body 9 is a long hole extending in the longitudinal direction of the base body 10, the mounting position of the fixture 2 can be adjusted.

[0017] In FIG. 3, as described above, the fixture 2 is fixed to the base body 10. In FIG. 2, a guide rail 11 is fixed along the longitudinal direction of the base body 10, and a moving body 20 is attached to the guide rail 11. More specifically, the moving body 20 includes a moving body main body 21, a slide body 22, and a nut 23 (FIG. 3). In FIG. 2, the slide body 22 is engaged with the guide rail 11, and as the slide body 22 is guided by the guide rail 11 and moves, the moving body 20 can move linearly integrally with it.

[0018] In FIG. 2, as will be described in detail later, a cutting mechanism 50 is supported by a bracket 40 at the lower part of the moving body main body 21. The cutting mechanism 50 has a motor 51 and a cutting edge 53 as main components.

[0019] In FIG. 3, brackets 12 and 13 are fixed to both ends of the base body 10, a bearing 14 is fixed to the bracket 12, and a bearing 15 is fixed to the bracket 13. Both ends of the screw shaft 16 are supported by the bearing 14 and the bearing 15. A handle 17 is attached to the side of the screw shaft 16 on the bearing 15 side.

[0020] In this configuration, when the handle 17 is turned, the screw shaft 16, which is screwed onto the nut 23, rotates. However, the screw shaft 16 is not screwed onto the left and right bearings 14 and 15, and the screw shaft 16 is attached to the bearings inside the bearings 14 and 15. Therefore, even when the screw shaft 163 rotates, the positional relationship between the screw shaft 16 and the bearings 14 and 15 does not change. On the other hand, the rotation of the screw shaft 16 changes the amount of the screw shaft 16 protruding from the nut 23. When the handle 17 is turned and the protrusion B increases, the protrusion C decreases. That is, the nut 23 moves axially relative to the fixed position of the screw shaft 16, and the movable body 20 moves together with it.

[0021] Figure 4 is a perspective view showing the vicinity of the cutting mechanism 50. The cutting mechanism 50 comprises a motor 51 and a cutting blade 53. The cutting blade 53 has cutting tips 55 fixed radially to a cutting blade body 54. The cutting blade 53 rotates integrally with the rotation axis (not shown) of the motor 51, and the tip of the cutting tip 55 cuts the end face (see Figure 1) of the web 62 of the H-shaped steel 60.

[0022] In Figure 4, a guide rail 32 is fixed to the lower part of the mobile body 21, and a slide body 31 is engaged with the guide rail 32. A bracket 40 is fixed to the slide body 31. An arc-shaped elongated hole 42 is formed in the bracket 40. An angle adjustment screw 41 is inserted through the elongated hole 42 and tightened to a support body 52 which is integrated with the motor 51. In this way, the cutting mechanism 50 is supported at the lower part of the mobile body 21.

[0023] Furthermore, by loosening the angle adjustment screw 41, the shaft of the angle adjustment screw 41 can move along the elongated hole 42 of the bracket 40. In this case, the cutting mechanism 50 moves together with the angle adjustment screw 41, making it possible to adjust the angle of the cutting mechanism 50. By adjusting the angle of the cutting mechanism 50, the inclination angle of the cutting blade 53 can be adjusted, making it possible to adjust the chamfering angle as well.

[0024] A nut support 30 is fixed to the mobile body 21, and a position adjustment screw 34 is screwed onto a nut 33 attached to the nut support 30. One end of the position adjustment screw 34 is attached to the top of the bracket 40 (see Figure 6). By turning the handle 35 attached to the other end of the position adjustment screw 34, the amount of the position adjustment screw 34 protruding from the nut support 33 changes, and the slide body 31 moves along the guide rail 32 in conjunction with this movement. The cutting mechanism 50 attached to the bracket 40 moves in conjunction with this movement. This allows the cutting blade 53 to be moved in either direction toward or toward the end face of the web 62 of the H-shaped steel 60 to be cut (see Figure 1), thereby enabling adjustment of the position of the cutting blade 53.

[0025] An elongated hole 38 is formed in the movable body 21, and the position-fixing shaft 39 moves along the elongated hole 38 in conjunction with the movement of the slide body 31. The position-fixing shaft 39 is inserted through a washer 37 and screwed into a threaded hole formed in the upper part of the bracket 40. A lever 39 is fixed to the position-fixing shaft 39, and the position-fixing shaft 39 rotates in conjunction with the rotation of the lever 39. Consequently, the tip of the position-fixing shaft 39 is tightened into a threaded hole formed in the upper part of the bracket 40, restricting the movement of the bracket 40 and the cutting mechanism 50 supported by it, and fixing the position of the cutting blade 53.

[0026] As described above, the configuration of the chamfering device 1 according to this embodiment can be attached to the H-beam 60 simply by fixing the fixing device 2 to the flange 61 of the H-beam 60. No installation structure for setting the chamfering device 1 on the ground or support columns to support the chamfering device 1 between itself and the ground are required. Therefore, the chamfering device 1 is not only simple in structure and can be made compact, but the whole thing is a single, self-contained structure, making it easy to handle during transport and installation. In addition, as detailed below, the cutting blade 53 can chamfer the web 62 over its entire width without interfering with other components.

[0027] Figure 5 shows a perspective view of the H-shaped steel beam 60 with the chamfering device 1 attached. For convenience, the cutting mechanism 50, bracket 40, and angle adjustment screw 41 are shown with solid lines, while the other parts are shown with dashed lines. Figure 6 is a side view of the vicinity of the cutting mechanism 50. In this figure, the base body 10, guide rail 11, and the web 62 of the H-shaped steel beam 60 are shown in cross-sectional view. In Figure 5, the cutting blade 53 is located at one end of the web 62 that extends in the longitudinal direction. When the rotating cutting blade 53 is moved along the end face of the web 62 together with the movable body 20 (in the direction of arrow a), the end face of the web 62 is chamfered.

[0028] In Figure 5, the fixing device 2 is fixed to the flange 61 by clamping it, and does not interfere with the cutting blade 53. In Figure 6, the base body 10, flange support 3, and movable body 20 are located above the cutting blade 53. The base body 10 is fixed to the flange 61 via the fixing device 2 (see Figures 5, 6, and 2), and the cutting blade 53 moves integrally with the movable body 20. Furthermore, no structures other than the cutting blade 53 are in contact with the plane of the web 62. The flange support 3 is located on the plane of the web 62, but it is above the cutting blade 53. With these configurations, there are no members that interfere with the cutting blade 53 during its movement, and the cutting blade 53 can chamfer the web 62 across its entire width without interfering with other members.

[0029] In other words, according to the chamfering device 1 of this embodiment, as described above, the structure is simple and compact, and the whole is a single, self-contained structure, making it easy to handle during transport and installation. In addition, since there are no members that interfere with the moving cutting blade 53 across the entire width of the web 62, the web 62 can be chamfered without the cutting blade 53 interfering with other members across the entire width of the web 62.

[0030] Figure 7 shows a side view of the vicinity of the cutting mechanism 50 according to an embodiment different from the one described above. The configuration in Figure 7 differs from that in Figure 6 in that a position regulating body 19 is added. The position regulating body 19 is fixed to the base body 10. As shown in Figure 7, when the chamfering device 1 is mounted on the H-shaped steel beam 60, the position regulating surface 19a of the position regulating body 19 is in contact with the plane of the web 62. The position regulating body 19 has a notch 19b formed in it and is positioned so as not to interfere with the moving cutting blade 53. With this configuration, the position of the chamfering device 1 can be regulated without adding any special fixings or mounting devices. In this embodiment, as shown in Figures 2 and 3, the fixing device 2 clamps the flange 61 of the H-shaped steel beam 60, and the addition of the position regulating body 19 makes the support of the chamfering device 1 more stable and improves the accuracy of chamfering by the cutting blade 53.

[0031] As described above, in Figure 5, there are no members that interfere with the cutting blade 53, and the cutting blade 53 can chamfer the web 62 over its entire width without interfering with other members. As a result, a chamfered portion 63 can be formed on the end face of the web 62, as shown in Figure 1(b). After this, the chamfering device 1 can be removed from the H-beam 60, and without inverting the H-beam 60, the chamfering device 1 can be inverted and the fixing device 2 of the chamfering device 1 can be attached to the lower flange 61 of the H-beam 60 to perform the lower chamfering of the end face of the web 62 as shown in Figure 1(b). The same chamfering can also be performed by inverting the H-beam 60 and then attaching the fixing device 2 of the chamfering device 1 to the upper flange 61 of the H-beam 60.

[0032] Figure 8 shows a perspective view of an H-shaped steel beam 60 with chamfered portions 63 and 64 formed on both the upper and lower ends of the web 62. Figure 9 is a perspective view showing one end of the H-shaped steel beam 60, with the chamfered portions 63 and 64 formed as shown in Figure 8, joined to a square steel pipe 65 by welding. For convenience, Figure 9 shows the H-shaped steel beam 60 shortened, and the other end of the H-shaped steel beam 60 does not show the square steel pipe 65, but the square steel pipes 65 are connected by interposing the H-shaped steel beam between the pair of square steel pipes 65.

[0033] Figure 10 shows a cross-sectional view along the DD line in Figure 9. Chamfered portions 63 and 64 are formed on both sides of the end face of the web 62, creating groove-like depressions on both sides of the end face of the web 62. The welding material 66 melts into these depressions, increasing the adhesion of the welding material 66 and ensuring the strength and quality of the welded portion.

[0034] Although one embodiment of the present invention has been described above, these are merely examples and the invention is not limited to the above embodiment. The structure of the base 10, the engagement structure between the base 10 and the movable body 20, the structure of the fixing device 2, the position adjustment mechanism of the fixing device 2, the structure of the cutting blade 53, the position adjustment mechanism and angle adjustment mechanism of the cutting blade 53, etc., may be other structures as long as they achieve similar effects and functions.

[0035] Furthermore, although the above embodiment uses a mechanism to move the movable body 20 using a screw shaft 16, this mechanism may be omitted, and the operator may grasp a part of the movable body 20 and move it horizontally, or the screw shaft 16 may be driven by a motor instead of manually. [Explanation of Symbols]

[0036] 1. Chamfering device 2 Fixtures 10 Base 16 Screw shaft 19 Position Regulator 20 Mobile Units 50 Cutting mechanism 51 Motor 53 Cutting blade 60 H-beam 61 Flange 62 Web 63, 64 Chamfered section

Claims

1. A chamfering device for chamfering the web of an H-shaped steel beam, which is composed of two flanges and a web sandwiched between the two flanges, Substrate and, A fixing device for fixing the base to the flange of the H-shaped steel, A cutting blade that is rotationally driven to chamfer the web, The system includes a movable body attached to the base and capable of reciprocating along the end face of the web, The cutting blade moves integrally with the moving body. There are no members that interfere with the moving cutting blade across the entire width of the web. A chamfering device characterized in that, with the base body fixed to the flange by the fixing device, the web can be chamfered over its entire width with the cutting blade by moving the movable body.

2. The chamfering device according to claim 1, wherein a position regulating body is attached to the base body, the position regulating body has a position regulating surface that contacts the plane of the web, and when the base body is fixed to the flange, the position regulating body is positioned so as not to interfere with the moving cutting blade.

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