JP2003266130A - Tool for bending sheet metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily bend a sheet metal having desired length and thickness at desired width and angle at a job site. <P>SOLUTION: This bending tool has a constitution in which a pair of rotary circular, truncated conical or conical guide rings 14, 15 are provided, wherein opposed inclined outer surfaces are parallel in the case they are a truncated cone or a cone, in the tip parts of shaft members 9, 10 which are provided movably back and forth and adjustably on a support base plate 4 with a prescribed interval, and a clearance 16 into which the sheet metal A is inserted is present between the rotary guide rings 14, 15 provided on the respective shaft members 9, 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet metal bending tool capable of manually bending various sheet metals at a construction site.

[0001]

2. Description of the Related Art Conventionally, when a desired sheet metal is bent at a construction site, for example, a sheet metal bending tool as disclosed in Japanese Utility Model Publication No. 52-6669 is used. This sheet metal bending tool uses a tightening nut to screw a main screw rod and a sub screw rod, which are provided with rotating guide rings facing each other at their head ends, at right angles to the board at a predetermined interval and so as to penetrate the board. The structure is such that it is fixed to the substrate, and a pressing rotation guide ring having the same diameter as the rotation guide ring is provided on the substrate side on the main screw rod.

When the sheet metal bending tool is used to bend the sheet metal, the sheet metal is inserted into a gap between the rotation guide ring and the pressing rotation guide ring of the main screw rod and the rotation guide ring of the auxiliary screw rod, and the board is attached. The sheet metal is bent to a predetermined size by grasping it and moving it back and forth while inclining it gradually. When changing the bending width of the sheet metal, loosen the tightening nut once to adjust the protruding length of the main screw rod and the sub screw rod with respect to the board, and then tighten the tightening nut again to tighten the main screw rod and the sub screw rod. It is performed by fixing it to the substrate.

[0003]

However, in the conventional sheet metal bending tool, when the bending width dimension of the sheet metal is changed, the tightening nut is loosened using a tool such as a spanner each time, and the main screw rod and the auxiliary screw are After adjusting the projecting length of the screw rod with respect to the substrate, the tightening nut must be tightened again with a tool to be fixed in order to perform bending.

Therefore, in the conventional sheet metal bending tool, it is necessary to loosen or tighten the tightening nut by using a tool such as a spanner each time, and it is efficient in a site where there are many bending work with different bending widths. It was a problem in terms of bending work. Also, at the work site, it is necessary to pay attention to the place where the tool is placed.

Further, in the conventional sheet metal bending tool as disclosed in the above publication, the sheet metal cannot be bent by 180 degrees because of its structure. Therefore, it is the current situation that the sheet metal is bent at a certain angle and then is bent at 180 degrees with a mallet, a square bar, a special tool or the like, which is a problem in terms of work efficiency.

The present invention was developed in view of the above-mentioned points, and it is possible to efficiently bend a sheet metal having a desired length and thickness to a desired width and angle at the work site to improve the work efficiency. An object of the present invention is to provide a sheet metal bending tool that can be used.

[0007]

In order to effectively achieve the above object, the present invention has the following constitution. That is, the sheet metal bending tool of the present invention according to claim 1 is provided with a pair of shaft members on the support substrate so as to be adjustable and fixed in the front-rear direction at a predetermined interval, and the vicinity of the tip of one shaft member. A pressing rotation ring is provided on each of the shaft members, a rotation ring is provided at each of the tip ends of both shaft members, and a gap is formed between the rotation guide rings provided on each shaft member so that a sheet metal to be bent can be inserted.

With this structure, the sheet metal can be easily bent by inserting the sheet metal to be bent between the rotation guide rings and moving the sheet metal in the longitudinal direction of the sheet metal while inclining the supporting substrate in the folding direction. Also, when bending the sheet metal to the desired bending width, move one shaft member forward and fix it, adjust the front-back spacing of both rotating rings, and then rotate both guides until the tip of the sheet metal hits the support substrate. By inserting and bending between the rings, the sheet metal can be easily bent to a desired width.

According to a second aspect of the present invention, there is provided a tool for bending a sheet metal, comprising: a support substrate having through holes formed at predetermined intervals; and a cylindrical member inserted into each through hole of the support substrate. A pressing rotation guide ring provided on the outer peripheral end of one tubular member protruding from the through hole of the support substrate to one side, a shaft member slidably inserted in each of the tubular members, and each shaft member being a tubular member. And a rotation guide ring provided at the tip of each shaft member protruding from the support substrate via the tubular member, and a sheet metal can be inserted between the rotation guide rings provided on each shaft member. It is a structure having a gap.

With this structure, the fixing means is loosened to adjust the protruding length of the shaft member, and the position of each rotation guide ring is determined so as to obtain a desired bending width, and then the fixing means fixes the shaft member. After doing this, the supporting substrate is grasped by one hand, and the sheet metal to be bent is inserted into the gap between the two rotation guide rings. Then, the supporting substrate can be moved, for example, in the longitudinal direction of the sheet metal, and the sheet metal can be bent while gradually tilting to one side.

According to a third aspect of the present invention, there is provided a sheet metal bending tool according to the present invention, in which a support substrate is provided with through holes at predetermined intervals, a tubular member fixed to each through hole of the support substrate, and a support member. A pressing rotation guide ring provided on the outer peripheral end of one tubular member protruding to one side from the through hole of the substrate, a shaft member slidably attached to each of the above tubular members, and each shaft member in the tubular member. It comprises a fixing means for fixing and a pair of rotation guide rings provided at the tip of each shaft member, and the pair of rotation guide rings provided at the tip of each shaft member are frustoconical or conical. , At the tip of the shaft member on the side where the presser rotation guide ring is provided,
One rotation guide ring is provided so that the bottom side is pressed against the rotation guide ring, and the outer slope of this rotation guide ring and the outer slope of the other rotation guide ring are parallel to each other with a desired distance. And the other rotation guide ring is provided at the tip of the other shaft member.

With this configuration, the gap between the two rotary guide rings of a truncated cone shape is adjusted to be slightly larger than the thickness of the sheet metal to be bent, and after the adjustment, one end of the bent portion of the sheet metal is first inserted into the gap, and the sheet metal is then inserted. By tilting the sheet metal bending tool in the bending direction while moving the sheet metal bending tool in the longitudinal direction, the edge of the sheet metal can be easily bent to the inclination angle of the rotating guide ring such as a truncated cone. further,
While slightly pressing the sheet metal bending tool in the bending direction, hold down the side edge of the sheet metal bent as described above to some extent with the inclined surface near the top of the other rotation guide ring on the presser rotation guide ring side. By moving the sheet metal bending tool in the longitudinal direction of the sheet metal, the side end portion of the sheet metal can be bent from the horizontal state to about 180 degrees.

Further, a sheet metal bending tool according to a fourth aspect of the present invention is the sheet metal bending tool according to the second or third aspect, in which at least one through hole formed in the support substrate is formed. The diameter is larger than the outer diameter of the tubular member, and the tubular member inserted into the through hole can be fixed at an arbitrary position in the diametrical direction of the through hole by a fixing mechanism, so that the gap between the rotary guide rings can be adjusted. It is a configuration.

According to this structure, the fixing mechanism is operated for at least one of the tubular members in which the shaft members are inserted, and the interval between the tubular members in which the shaft members are inserted can be changed according to the thickness of the sheet metal. A sheet metal having a desired thickness can be inserted and bent in a gap between both rotary guide rings inserted in the member.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1 to 4 are views relating to an example of a sheet metal bending tool according to the present invention, FIG. 1 is an overall perspective view, FIG. 2 is a sectional view of an essential part, and FIG. 3 is an enlarged sectional explanatory view of a fixing means. 4 is an explanatory view of a usage state.

In these figures, 1 is a sheet metal bending tool according to an example of the present invention.
Is a support substrate 4 in which two through holes 2 and 3 are formed at a predetermined interval, tubular members 5 and 6 inserted into the through holes 2 and 3 of the support substrate 4, and one tubular member 5 The pressing rotation guide ring 8 provided on the outer peripheral end portion 7 of the shaft member, the shaft members 9 and 10 slidably inserted in the respective cylinder members 5 and 6, and the shaft members 9 and 10 respectively. Fixing means 11 for fixing to the shafts, and rotation guide rings 14 and 15 provided at the tip portions 12 and 13 of the shaft members 9 and 10, respectively.
And,

The support substrate 4 is a square member having an appropriate thickness. Of course, it may have another shape such as a circle or a polygon, and may have any size and thickness. Further, the support substrate 4 may have a configuration in which a U-shaped grip portion that can be held by the hand is provided on the back side.

On the support substrate 4, both rotation guide rings 1 are provided.
Two through holes 2 and 3 are provided near the center at a predetermined interval so that a gap 16 into which the sheet metal A having a predetermined thickness can be inserted is formed between the four and the fifteen.

The diameter of at least one of the through holes 2 (see FIG. 2) is larger than the outer diameter of the cylindrical member 5 to be inserted. This is to allow the gap 16 between the rotary guide rings 14 and 15 to be arbitrarily changed (narrow or wide) according to the thickness of the sheet metal A to be bent. Details will be described later. The through holes 2 and 3 may be slightly larger than the outer diameters of the tubular members 5 and 6 and may have a size that allows the tubular member 5 to be fitted therein without moving.

The tubular members 5 and 6 inserted into the through holes 2 and 3 of the support substrate 4 are cylindrical in the illustrated example, and flange portions 17 and 18 for locking the support substrate 4 are provided at one end. When the flange portions 17 and 18 are formed and are inserted into the through holes 2 and 3 by locking the flange portions 17 and 18 to the support substrate 4, the outer peripheral surface of the support substrate 4 opposite to the flange portions 17 and 18 is threaded. The part 19 is formed. In addition, each tubular member 5,
The outer shape or inner shape of 6 is not limited to a cylindrical shape, and may be a polygonal shape such as a pentagonal shape or a hexagonal shape.

In the threaded portion 19 of each of the tubular members 5 and 6,
Tightening nuts 20, 21 are screwed on. By tightening the tightening nuts 20 and 21 on the support substrate 4 side, the tubular members 5 can be sandwiched between the support substrate 4 and the flange portions 17 and 18. Therefore, the tubular member 5 can be fixed at a desired position in the through hole 2 of the support substrate 4 even in the through hole 2 having a larger diameter than the outer diameter of the tubular member 5. Therefore, the shaft members 9 and 10 can be moved closer to and away from each other through the tubular members 5 and 6, and the gap 16 between the rotary guide rings 14 and 15 can be changed to a desired distance. In the illustrated example, the through hole 2
Is larger than the outer diameter of the tubular member 5, but the other through hole 2
May have a larger diameter than the outer diameter of the tubular member 6. In this case, the rotation guide ring 15 side can also be moved toward or away from the rotation guide ring 14 side.

A fixing mechanism 3 for fixing the tubular member 5 inserted into one of the through holes 2 at an arbitrary position in the diametrical direction of the through hole 2.
0 is the flange portion 17 and the threaded portion 1 of the tubular member 5 described above.
9 and a tightening nut 20.

An inner ring portion 8a of a cylindrical pressing rotation guide ring 8 is fixedly provided on the flange portion 17 of the outer peripheral end portion 7 of the one tubular member 5 described above. The outer ring portion 8b of the rotation guide ring 8 freely rotates via the ball 8. The presser rotation guide ring 8 acts to press the sheet metal A from the back surface in the folding direction while stably supporting the sheet metal A during bending.

The shaft members 9 and 10 having such a length that they can be inserted are slidably inserted into the cylindrical members 5 and 6, respectively.

Further, the shaft members 9, 1 are attached to the tubular members 5, 6, respectively.
Fixing means 11 for fixing 0 is provided. This fixing means 11 (see FIG. 3) has through screw holes 22 formed on the upper side of the tubular members 5 and 6, butterfly bolts 23 screwed into the through screw holes 22, butterfly bolts 23 and the tubular member 5, And a coil spring 24 provided between the shaft member 9 and 6 to fix the shaft members 9 and 10 to the tubular members 5 and 6 by screwing the wing bolt 23 and loosen the shaft members 9 and 10. Each tubular material 5, 6
It can be slid inside.

The tip portions 12, 13 of the shaft members 9, 10 are
2 (see FIG. 2) are provided with rotation guide rings 14 and 15 which are ball bearings in the illustrated example. The inner ring portion 25 of each rotation guide ring 14, 15 is attached to each shaft member 9, 10
The outer ring portion 28 is fixedly attached to the collar portion 26, and the outer ring portion 28 freely rotates through the balls 27.

The sheet metal bending tool 1 according to the present invention has the above-mentioned structure. When used, the butterfly bolt 2 is used.
Loosen 3 to adjust the protruding length of the shaft members 9 and / or 10 and adjust the rotation guide ring 1 so that the desired bending width is obtained.
After determining the positions of 4 and 15, the butterfly bolts 23 are tightened to fix the shaft members 9 and / or 10 to the tubular members 5 and 6.

After doing this (see FIG. 4), the support plate 4 (and / or the tubular members 5 and 6) is grasped from the back side with one hand, and the sheet metal A to be bent is fixed to both rotation guide rings 14 and.
The insertion tip a is brought into contact with the support substrate 4 by inserting it into the gap 16 of 15. At this time, the side surface portion of the sheet metal A on the insertion tip side is
It is brought into contact with the presser rotation guide ring 8. Then, the support substrate 4 is moved in the front-rear direction in the drawing and is gradually tilted in one direction (the arrow X direction in FIG. 4) to bend the sheet metal A from the end 29 of the outer ring portion 28 of the rotation guide ring 15. By doing so, the sheet metal A can be bent to a bending width from the insertion tip a of the sheet metal A to the end 29 of the outer ring portion 28 of the rotation guide ring 15.

Further, the sheet metal A is bent to a desired width by operating the fixing means 11 so as to correspond to the desired bending width and adjusting the protruding length of each shaft member 9, 10 with respect to the supporting substrate 4. You can When returning the bending, the bending can be returned by performing the bending operation in the direction opposite to the arrow X direction in FIG. Further, depending on the thickness of the sheet metal A, the space between the shaft members 9 and 10 may be adjusted as described above to use the sheet metal bending tool 1 according to the present invention.

The present invention is not limited to the above-described example, but male threads are formed on the outer peripheral surfaces of the tip ends of the tubular members 5 and 6, and female threads are formed on the through holes 2 and 3 of the support substrate 4. The tip ends of the tubular members 5 and 6 may be screwed into the through holes 2 and 3 to fix the tubular members 5 and 6 to the support substrate 4. In this case, the pressing rotation guide ring may be provided on the tubular member 5 or may be provided on the support substrate 4 via an interposing material. In the case of this example, the gap 16 between the rotary guide ring 14 and the rotary guide ring 15 is a fixed sheet metal bending tool that cannot be changed.

5 to 9 are views showing another example of a sheet metal bending tool. For the sake of convenience, the same parts will be designated by the same reference numerals and description thereof will be omitted, and different structures will be described below.

In the sheet metal bending tool 1 of this example, the shapes of the rotation guide rings 14 and 15 provided at the tip of each shaft member are different from the above examples. That is, in this example, each rotation guide ring 14, 15 is a truncated cone of the same size,
The mutual rotation guide rings 14 and 15 change their directions by 180 degrees and are rotatably fixed to the tip portions 12 and 13 of the respective shaft members 9 and 10 in the same manner as in the above-described example.

In this case, one rotation guide ring 14
(Refer to FIG. 7) The tip 12 of the shaft member 9 on the side where the presser rotation guide ring 6 is provided has the bottom 14a side of the frustoconical rotation guide ring 14 facing the presser rotation guide ring 8. Is provided.

The other rotation guide ring 15
The inclined line 32 of the outer peripheral surface 31 and the inclined line 34 of the outer peripheral surface 33 of the rotation guide ring 14 have an appropriate gap 16.
Are provided on the tip portion 13 of the other shaft member 10 so as to be parallel to each other. Both rotation guide rings 14,
The gap 16 between 15 can be appropriately changed by moving the shaft member 10 back and forth according to the thickness of the sheet metal A to be bent, and the sheet metal A can be inserted into the gap 16 and bent.

Further, in order to facilitate the operation of the sheet metal bending tool 1, a substantially U-shaped auxiliary member 35 whose upper side is slightly shorter than the lower side is provided on the back side of the support substrate 4, and at the time of operation. The front part of the palm can be pressed when the both sides of the support substrate 4 are grasped, and the sheet metal bending tool 1 can be stably moved.

Next, a case where the sheet metal A is bent to a desired width and angle by using the sheet metal bending tool 1 will be described.
(See FIGS. 8 and 9).

In the sheet metal bending tool 1 of this example, the sheet metal A is
A major feature is that it can be bent from 0 to 180 degrees. In the illustrated example, a process of bending the side end portion 36 of the sheet metal A by 180 degrees with a width of about 1 to 2 cm is shown. First, the rotation guide ring 14 is pushed to a position adjacent to the rotation guide ring 8 and the rotation guide ring 14 The shaft member 9 of the tubular member 5
Secure it with butterfly bolts 23. Next, the other butterfly bolt 2
3 is temporarily loosened and the shaft member 10 is moved in the front-rear direction, the gap 16 between both rotary guide rings is adjusted to a gap slightly wider than the thickness of the sheet metal A to be bent, and the butterfly bolt 23 is tightened to move the shaft member 10 into a cylinder. It is fixed to the material 6.

The sheet metal A to be processed after such adjustment (or before the adjustment) is placed on the square bar 37 (work table), and the side end portion in the longitudinal direction of the sheet metal A is located slightly outside the side end 38 of the square bar 37. Put out 36. Then, the sheet metal bending tool 1 is gripped from the back side and the gap 16 between the two rotation guide rings is fitted to one end side of the side end portion 36 of the sheet metal A. In this case, the outer peripheral surface 33 (inclined outer surface) of the rotation guide ring 14 is brought into contact with the back surface of the sheet metal A, and the outer peripheral surface 31 (inclined outer surface) of the rotation guide ring 15 is brought into contact with the front surface (upper surface) of the sheet metal A. .

After this, with one hand, press the appropriate position of the sheet metal A from above, fix it to the square member 37 so as not to slip, and gradually cover the sheet metal bending tool 1 on the sheet metal A. The timber 37 is moved in the longitudinal direction while being tilted.

As a result, both rotary guide rings 14,
The side end portion 36 of the sheet metal A sandwiched by 15 is bent from a position where the outer peripheral edge 39 of the rotation guide ring 15 abuts.

In this way, the sheet metal bending tool 1 is attached to the sheet metal A.
It is possible to bend the side end portion 36 of the sheet metal A to a desired angle by moving the sheet metal bending tool 1 in the longitudinal direction, gradually bending it, and stopping tilting the sheet metal bending tool 1 at a desired angle in the bending direction.

Maximum bending angle in this case (see FIG. 9)
Is from the horizontal state to about 150 degrees. In other words, the sheet metal bending tool 1 is tilted in the bending direction until the rotation guide ring 15 contacts the upper surface of the sheet metal A, and is moved in the longitudinal direction of the square member 37 (or the sheet metal A) to bend the sheet metal bending tool 1. Inclination angle 40 of the guide ring 15
(See FIG. 7) The sheet metal A up to a position about the same as 30 degrees (the position where the sheet metal A is bent from the horizontal state to about 150 degrees)
The side end 36 of the can be bent.

Further, the rotation guide ring 15 is slid on the upper surface of the sheet metal A, and the sheet metal bending tool 1 is slightly moved in the direction of the end 41 on the opposite side of the sheet metal A that is being bent, and the rotation guide ring 15 is moved. By pressing the inclined portion 42 near the top of the fifteen from above to the bent side end portion 36 and bending the side end portion 36, the side end portion 36 can be bent beautifully from the horizontal state up to about 180 degrees without waviness.

The rotation guide ring attached to the tip of the shaft member of the sheet metal bending tool of the present invention may have a conical shape. Further, the inclination angle of the rotation guide ring is optimally 30 degrees as described above, but may be another angle.

[0045]

As described above, in the sheet metal bending tool of the present invention, the sheet metal is inserted between the rotation guide rings, and the supporting substrate is tilted in the bending direction and moved in the longitudinal direction of the sheet metal, whereby the sheet metal can be easily moved. Can be folded. Therefore, anyone can easily and quickly perform the sheet metal bending work, and the work efficiency can be further improved as compared with the conventional case. In addition, since each shaft member can be moved back and forth to adjust the interval between both rotary rings, the sheet metal can be easily bent to a desired bending width.

Further, in the sheet metal bending tool of the present invention, by operating the fixing means, the sheet metal can be easily and quickly adjusted so that it can be bent to a desired width, and the desired width can be obtained on site. Bending of sheet metal can be performed. Therefore, it is possible to further improve the work efficiency of bending work of a sheet metal at a desired width on site. Also,
With the sheet metal bending tool of the present invention, it is possible to perform bending of sheet metal at a construction site, etc.
Sheet metal can be easily bent to an infinite length without the need for joints that cause rain leaks such as kappa. It can be easily adjusted according to the bending dimensions and the thickness of the sheet metal, and it is compact and easy to handle. Furthermore, the bent portion can be bent straight without being deformed at the time of bending, and the bending finish is good.

In the sheet metal bending tool of the present invention,
If the rotary guide ring is frusto-conical or conical, the sheet metal can be easily bent to a desired angle up to 180 degrees from the horizontal state, which cannot be achieved by conventional tools. Therefore, it is not necessary to bend it up to 90 degrees and then hit it with a mallet or the like to bend it up to 180 degrees as in the conventional case, and to finish it neatly without bending the folded portion at the time of bending. be able to.

Further, in the sheet metal bending tool of the present invention, the diameter of at least one through hole formed in the support substrate is larger than the outer diameter of the cylindrical member, and the cylindrical member inserted in this through hole is used as the through hole. It can be fixed at any position in the diametrical direction by a fixing mechanism, and by adjusting the gap between both rotation guide rings, the distance of the gap can be adjusted according to the thickness of the sheet metal to be bent, and the bending can be performed stably. can do.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an example of a sheet metal bending tool according to the present invention.

FIG. 2 is a cross-sectional view of essential parts of an example of a sheet metal bending tool according to the present invention.

FIG. 3 is an enlarged transverse sectional view of an example of fixing means according to the present invention.

FIG. 4 is an explanatory view showing a usage state of an example of the sheet metal bending tool according to the present invention.

FIG. 5 is an overall perspective view of another example of a sheet metal bending tool according to the present invention.

FIG. 6 is a perspective view of the sheet metal bending tool of FIG. 5 viewed from the back side.

FIG. 7 is an explanatory view of a rotation guide ring of the sheet metal bending tool of FIG. 5 viewed from above.

FIG. 8 is an explanatory view showing a usage state of the sheet metal bending tool of FIG.

9 is an explanatory view showing a state where the sheet metal of FIG. 8 is further folded.

[Explanation of symbols]

1 Sheet metal bending tool 2, 3, through holes 4 Support substrate 5, 6 tube material 7 Outer edge 8 Presser rotation guide ring 9, 10 shaft members 11 Fixing means 12, 13 Tip 14, 15 Rotating guide ring 30 fixing mechanism

Claims (4)

[Claims] 1. A pair of shaft members are provided on a support substrate so as to be adjustable in forward and backward directions and fixed at predetermined intervals, and a pressing rotary ring is provided near the tip of one shaft member, and both shaft members are provided. A tool for bending a sheet metal having a structure in which a rotating ring is provided at each of the tip ends of the shafts, and a gap for inserting a sheet metal to be bent is provided between the rotating guide rings provided in each shaft member. 2. A support substrate having through holes formed at predetermined intervals, a tubular member inserted into each through hole of the support substrate, and one tubular member protruding from the through hole of the support substrate to one side. A pressing rotation guide ring provided at the outer peripheral end, a shaft member slidably inserted in each of the above-mentioned tubular members, a fixing means for fixing each shaft member to the tubular member, and a support substrate from the supporting substrate via the tubular member. A sheet metal bending tool comprising a rotating guide ring provided at the tip of each protruding shaft member, and having a gap into which a sheet metal can be inserted between the rotating guide rings provided on each shaft member. 3. A supporting substrate having through holes formed at predetermined intervals, a tubular member fixed to each through hole of the supporting substrate, and an outer periphery of one tubular member protruding from the through hole of the supporting substrate to one side. A presser rotation guide ring provided at an end, a shaft member slidably inserted in each of the tubular members, a fixing means for fixing each shaft member to the tubular member, and a tip portion of each of the axial members. A pair of rotation guide rings, which are provided at the tip end of each shaft member, have a truncated cone shape or a conical shape, and the tip end of the shaft member on the side where the presser rotation guide ring is provided. One rotation guide ring is provided in the portion so that the bottom side is pressed against the rotation guide ring, and the outer slope of this rotation guide ring and the outer slope of the other rotation guide ring are parallel to each other with a desired distance. The other rotation guide ring. Configuration sheet metal bending tool is provided at the tip portion of the one shaft member. 4. A mechanism for fixing at least one through hole formed in the support substrate, the diameter of which is larger than the outer diameter of the tubular member, and the tubular member inserted into the through hole is fixed at an arbitrary position in the diameter direction of the through hole. The sheet metal bending tool according to claim 2 or 3, wherein the tool can be fixed by means of the above-mentioned method so that a gap between the both rotary guide rings can be adjusted. [0001]