JP2002178040A - Long stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a long stock which can be positioned by at least one side in a joined side comprising a plurality of continuous sides with angle therebetween, to allow the dimensional accuracy of cutting for the folding to be rough. SOLUTION: A stepped part 12 of the dimension a is formed on a base material X to be folded at the position with the dimension A as a reference from the folding reference CL, and a part of a top wall 10D of a base material Y to be folded is joined with the stepped part 12 during the folding. The base materials X and Y are positioned thereby. Since the positioning is performed by abutting an outer periphery (the top member 10D) of the member (the base material Y) itself to be desiredly folded at 90 deg. on a vertically cut part (the stepped part 12), the angle setting for forming the part to be cut off may be comparatively roughly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long member formed of a plurality of wall members that are continuous in an angle.

[0002]

2. Description of the Related Art When a long material such as a hollow square pipe or an angle steel (L-shaped angle material) or a groove steel (a channel material) is bent at a predetermined position and at a predetermined angle, a hollow square pipe or an angle steel (L-shaped angle material) or a channel steel is required. Instead of using a bending mold to bend this by pressing, a so-called bending process, a technique was adopted in which after cutting out a part of the long material, the long material was bent at a predetermined angle (hereinafter, referred to as a “bending process”). A prior art 1) is known (for example, see Japanese Patent Application Laid-Open No. 8-309430).

[0003] According to the prior art 1, by appropriately changing the mold tool, it can be bent into any shape at any angle, and can be applied to various fields.

However, in the bending technique of the prior art 1, the processing accuracy of the bent joint portion of the long material directly affects the bending angle accuracy of the member.

[0005] In the case of processing using a special mold tool, it is necessary to change the mold tool every time the size of the long material or the bending angle is different. Further, the mold tool loses sharpness over time and becomes unstable in accuracy.

In order to solve this problem, the present applicant has proposed a bending structure of a long material that can be bent at a predetermined angle by processing with a general processing tool without using a special mold tool (hereinafter referred to as a prior art). 2) (Japanese Unexamined Patent Publication No.
1-3-4222).

The prior art 2 has a structure in which a cut portion is provided in a long material, a pair of bent base materials is formed with the cut portion as a boundary, and the cut portion is used as a joining side.

According to the prior art 2, for example, when a long material is bent at 90 degrees, a part of the joining sides formed on one of the bent base materials and connected at right angles to each other (first joining side).
Is formed perpendicularly to the longitudinal axis of the other folded base material, and another part (second joining side) of the joining side is formed parallel to the longitudinal axis of the other folded base material. By doing so, the long material can be bent by 90 degrees.

In this case, since the processing is not performed by using a special mold tool, it is not necessary to set a special tool for each long material size and bending angle.

[0010] However, the prior art 2 has a structure in which the joining side is perpendicular or parallel to the longitudinal axis of the bent base material at the time of processing the joining side. If accurate processing is not performed on all of them, the bumps may not be reliably bumped at the time of bumping, and a gap may be formed at the joint.

Further, in the bending at 90 degrees, the joining side is perpendicular and parallel to the longitudinal axis of the bent base material, but the stress applied to the joining side concentrates on the vertically opposed portion, and There is a problem that some parts have to be stressed (the other parts do not work).

In view of the above facts, the present invention makes it possible to position by at least one side in a joining side composed of a plurality of sides that are continuous at an angle, and to reduce the dimensional accuracy of the cutting process for bending. The purpose is to obtain a long material that can be made into a long material.

Another object of the present invention is to provide a long material which can appropriately disperse stress on a joint portion due to a load applied after bending and receive the entire joint portion.

[0014]

According to the first aspect of the present invention, a plurality of wall members continuous in an angle are formed, and at least one wall member is left as a connecting member, and another wall member is connected. A part is cut off, the cut part is divided into a pair of bent base materials, and the pair of bent base materials are bent on the connecting wall member so that the cut part is on the inside. A long material that can be bent at a predetermined angle around an end, and has a pair of opposing sides formed at portions facing each other when the respective bent base materials are bent at a predetermined angle. The angle formed between the pair of opposing sides and the bending base end is set to the predetermined bending angle, so as to be continuous with the opposing side of the one bending base material and the other bending. A part of the wall member of the base material is formed so as to be a mating surface to be abutted for positioning. It is characterized in that.

According to the first aspect of the present invention, a part of the long material is cut off to form a pair of bent base materials, and when the cut portion is bent inside as a boundary, a pair of bent base materials is formed. The curved base materials approach each other, the ends of the cut part face each other,
Bending at a predetermined angle becomes possible.

At this time, a cut is made in the one bent base material substantially perpendicularly to the wall member, so that the bent inner surface of the one bent base material is opposed to the one bent base material. A step is formed so as to be continuous with the side. As a result, the pair of bent substrates are not symmetrical left and right, and the respective angles of the pair of opposing sides at the bending base end with respect to the reference line are different from each other.

Since the inner wall surface of the other bent base material is abutted against the stepped portion, it is sufficient if the accuracy of the cutting for positioning is sufficient in this portion. As a result, the processing accuracy of the other cut portion may be rough. For example, a configuration may be adopted in which roughening is performed as a stress receiving surface to increase the friction coefficient and prevent displacement due to stress concentration on the mating surface.

According to a second aspect of the present invention, a part of another wall member is cut off while being formed of a plurality of wall members that are continuous in an angle, and at least one wall member is left for connection. Dividing the cut portion into a pair of bent substrates,
An elongated material capable of bending the connecting wall member at a predetermined angle around a bent base end, such that the cut portions of the pair of bent base materials are on the inside, When the bent base material is bent at a predetermined angle, the base material has a pair of opposing sides formed at portions facing each other, and an angle formed between the pair of opposing sides and the bending base end is the predetermined folding. While setting the bending angle, forming a refraction part in the middle part,
By forming the bent portion, the bent portion is formed so as to be continuous with the opposing side of the one bent base material, and a part of the wall member of the other bent base material becomes a mating surface to be abutted for positioning. It is characterized by.

According to a third aspect of the present invention, in the second aspect of the present invention, a portion continuous with the pair of opposing sides formed by the refracting portion is aligned with an axis of the pair of bent substrates. It is characterized in that it is formed so as to receive stress from a non-perpendicular direction.

According to the second and third aspects of the present invention, in addition to the function and effect of the first aspect, the pair of opposing sides is bent, for example, into a wedge shape, so that the pair of opposing sides is joined at the time of joining. The sides are abutted against each other, and can also have a function as a guide surface at the time of bending. Furthermore, as described in claim 3, in each linear portion of the pair of opposing sides, stress is applied from a direction non-perpendicular to the axis of the pair of bending members. It becomes possible.

According to the fourth aspect of the present invention, in addition to the functions and effects of the first to third aspects, a part or all of the pair of opposing sides functions as an abutting surface. It is characterized by having.

Further, according to the fifth aspect of the present invention, the wall member is provided with a notch corresponding to a bending angle at the cut portion to prevent the member from bulging due to bending. I have.

According to the sixth aspect of the present invention, the wall member is provided with a bending position setting means for setting a bending line.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 5 show the configuration of a long material 10 to which a structure for bending a long material according to a first embodiment is applied. Have been.

The long material 10 is a hollow square pipe composed of vertical walls 10A and 10B, a horizontal wall 10C, and a ceiling wall 10D that are continuous in an angle. In the first embodiment, for example, Dimension A = 50 mm, wall thickness t = 2.3
mm. A case where the long material 10 is bent at, for example, 90 degrees will be described.

When the long material 10 is bent at 90 degrees, the distance from the bending center line CL is set on the basis of the outer dimension A, and is perpendicular to the ceiling wall 10D to the side wall 10C (depending on the bending angle). The machining is started by cutting the wafer by the dimension a. This processing includes, for example, NC laser processing, N
C, etc., and then different angles θ1 and θ2 (where θ
(1 + θ2 = 90 °), and one divided substrate X and the other folded substrate Y are separately set.

Furthermore, one of the bent base materials X and the other bent base material Y are joined to each other so that the cut portions are on the inner side (with the bending center line CL as the center) so that the peripheries of the cut portions are joined to each other. By doing so, it is configured to be bent at 90 degrees. At this time, the angle θ1 formed by the cut line L1, which is the bent and cut portion formed on the bent base material X, with respect to the bent center line CL is the angle formed by the cut line L2 formed on the bent base material Y. It is formed smaller than θ2 (θ1> θ2).

Here, the angle θA between the step portion 12 and the cut line L1 matches the angle θB between the ceiling wall 10D of the bent base material Y and the cut line L2, and the cut lines L1 and L2 are When facing, a part of the upper side surface of the bent base material Y (the length corresponding to the dimension a from the cut position)
Are joined to the step portion 12.

Here, the bent base material X is formed with one opposing concavely formed angle θA, and the bent base material Y is formed with the other opposing convexly formed angle θB. The bent substrates X and Y are bent at an angle of 90 ° by being formed, facing each other, and abutting against a part of the stepped portion 12 of the ceiling wall 10D of the bent substrate Y. become.

That is, the cut lines L1 and L2 are a pair of opposing sides, and do not necessarily need to be in contact with each other. The part and the step part 12 bear.

At this time, the step 12 and the bent substrate Y
Of the ceiling wall 10D is used as a positioning, but the cut lines L1 and L2 are roughened to each other to form a joint side that receives stress from the bent base materials X and Y in the axial direction. It is also possible to have a function. Conversely, the cut lines L1 and L2 need not necessarily be in contact.

As shown in FIG. 3, a notch 24 is formed in the side wall 10C of the long material 10 in correspondence with the bent corner of the cut portion (at the portion corresponding to the bending center line CL). Have been. The notch 24 has a function of preventing the member from bulging due to bending. In the first embodiment, the width dimension b is 3 mm and the depth dimension c is 3 mm.
mm.

Further, a notch groove 26 is formed in the lateral wall 10C of the long material 10 so as to be continuous with the notch 24. The notch groove 26 is formed along the bending center line CL and has a function of setting a bending position. In the first embodiment, the width dimension d is 0.3 mm and the depth dimension e is It is set to 7 mm. In addition, the width dimension of the portion of the lateral wall 10C where the notch groove 26 is not formed (the portion remaining after the formation of the notch groove 26) is set to be 2/3 or more of the width dimension of the lateral wall 10C. It is preferable to set a depth dimension e of 26.

Next, the operation of the first embodiment will be described.
0 will be explained.

First, when the long material 10 is bent, the vertical walls 10A and 10B and the ceiling wall 10D of the long material 10 are partially cut off, and one of the bent base materials is cut off at the bending center line CL. X and the other bent base material Y are separately set.

In the long material 10 divided into the bent base materials X and Y, one bent base material X and the other bent base material Y
And are bent so that the cut portions are closer to each other with the cut portion inside.

At this time, cut lines L1 and L2 are formed at angles θ1 and θ2 with respect to the bending center line CL, respectively.
Since the sum of 1 and θ2 is 90 °, the cut line L
1. By making L2 face each other, the bent base materials X and Y become 9
A bending of 0 ° becomes possible (see FIG. 4).

Here, in the long material 10, the difference between the angles θ1 and θ2 (θ1> θ2 in the first embodiment).
This can be achieved by forming a step 12 having a dimension a provided at a position based on the dimension A from the folding reference CL on the bent base material X. As a result, the lengths of the cut lines L1 and L2 are the same (L1 = L2).

At the time of the above-mentioned bending (at the time of joining with the cut lines L1 and L2), the stepped portion 12 has the ceiling wall 1 of the bent base material Y.
Part of 0D is joined. Thereby, the folding substrates X and Y are positioned. That is, the outer periphery (the ceiling member 10D) of the member (the bent base material Y) itself to be bent at 90 ° is
Since the positioning is performed by contacting the vertically cut portion (the step portion 12), the angle setting when forming the cut portion is relatively rough and good. At this time, the cut line L
1, the end face of L2 is intentionally made a rough surface, a friction coefficient is increased, slippage is prevented, and a stress receiving surface can be obtained. In an extreme case, the cut lines L1 and L2 may have a saw-toothed shape with irregularities alternated. Conversely, the cut line L
1, L2 does not necessarily need to touch.

As described above, the stepped portion 12 perpendicular to the longitudinal axis of the bent base material X and the ceiling wall 10D of the bent base material Y
And the cut lines L1 and L2 are set to be opposite sides to be bent at 90 degrees (predetermined angle), so that at least the step portion 12 of the bent base material X and the bent base material Y If the ceiling wall 10D is suitably set, the processing (cutting) accuracy of the other peripheral portion of the cut portion of the long material 10 does not affect the bending angle accuracy of the member.

It is of course possible to use the cut lines L1 and L2 for positioning. However, even if the end face is intentionally made rough and functions as a stress receiving surface, the positional accuracy is reduced by the step portion 12 and It can be kept with the ceiling wall 10D.

For this reason, for example, the bending R of the bent portion
Even when the (curvature radius) is processed to be large or when the thickness t of the long material 10 is thin, the bending processing accuracy can be maintained with high accuracy. In particular, the step 12 and the ceiling wall 10
Since D is provided on the inner periphery of the cut portion of the member on the inner side of the bent portion, even if the cut portions are welded after the peripheral edges are bent, they are less susceptible to the distortion caused by this welding. The precision of the bending angle does not decrease.

The long member 10 according to the first embodiment
According to the bending structure of (1), the notch 24 is formed on the side wall 10C of the long material 10 corresponding to the bending corner in the cutout portion. Therefore, when the long material 10 (the bent base material X and the bent base material Y) is bent around the bending center line CL, bulging of the member due to bending is prevented, and a bending corner portion is unnecessarily bulged. It is finished well without being clogged and deformed.

Further, a notch groove 26 is formed in the lateral wall 10C of the long material 10 so as to be continuous with the notch 24. Therefore, when the long material 10 (the bent base material X and the bent base material Y) is bent along the bending center line CL, the notch grooves 26 are used.
In order to set the bending position and to exert the guiding function at the time of bending, the long material 10 (the bent base material X and the bent base material Y) is smoothly moved at a predetermined position (bending center line CL). It can be bent and can be bent with high precision.

Further, if a guide hole or a guide groove is provided between the cutout grooves 26 formed at both ends in the width direction of the lateral wall 12C along the bending center line CL,
The dimensional accuracy can be further improved.

By providing the notch 24 and the notch groove 26, when the outer wall surface of the long material is used as a reference,
For example, if you want to drill holes before bending,
The dimensional accuracy can be further improved.

As described above, in the bent structure of the long member 10 according to the first embodiment, the long member 10 to be a hollow square pipe is bent at a predetermined position and at a predetermined angle with high precision. This can be realized at low cost without using special tools, and the range of application is expanded.

In the first embodiment, the configuration in which the elongated member 10 is a hollow square pipe and the elongated member 10 is bent has been described. However, the present invention is not limited to this, and for example, an angle iron (L-shaped) Angle material) and channel steel (channel material)
The present invention can be applied to a case where a long material having another cross-sectional shape is bent at a predetermined position at a predetermined angle.

In the first embodiment (including the modifications), the notch 26 is provided continuously with the notch 24, but it is not always necessary to provide the notch continuously.
The effect is the same even in a position distant from 4.

Furthermore, if NC laser processing or NC fusing processing is applied to the cut portion, processing accuracy can be further improved and shape flexibility can be achieved. (Second Embodiment) Hereinafter, a second embodiment of the present invention will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and the description of the components will be omitted.

As shown in FIG. 6, in the second embodiment, the opposite side of the bent base material X is constituted by two cut lines L1-A and L1-B bent at a predetermined angle at the center. And are convex as a whole. Cut line L1
−A and the angle formed by the step 12 are θA, and L1-B
And the angle formed by the bending center line CL is θ1.

On the other hand, the opposite sides of the bent base material Y have two cut lines L2-A, L2-B
B, which is concave as a whole. The angle between the cut line L2-A and the ceiling wall 10D is θB, and the angle between the cut line L2-B and the bending center line CL is θ2.

Here, the angles θ1 and θ2 are defined as θ1 = θ
2, and θ1 + θ2 = 90 ° (bending angle), and θA = θB. In this case, the angle θ
A and θB are obtuse angles.

According to such a structure, the cut line L
1-A and L2-A are joined, and cut lines L1-B and L2-B are joined. In addition, the step 12
Is the ceiling wall 1 of the bent base material Y as in the first embodiment.
Join with 0D.

In this case, the cut lines L1-A, L1-
The convex shape formed by B is the cut line L2-A, L2
-B, so-called wedge-fitting, so that the stress from the direction of the longitudinal axis of the bent base material X or Y can be dispersed, and the fitting (joining) state can be strengthened. Can be held.

The cut lines L1-A, L1-
B and the cut lines L2-A, L2
The concave shape formed by -B has a guide function, whereby the trajectory of the pair of bent substrates X and Y can be corrected to an appropriate position by bending movement during the bending operation.

In the second embodiment, the cut lines L1-A, L1-B, L2-A, and L2-B are also mating surfaces that abut each other. The surface to be applied (the mating surface)
Only the step portion 12 and the ceiling wall 10D are provided, and at least the cut lines L1-A and L2-A are provided with a guide function only,
The cut lines L1-B and L2-B can have a slight interval. (Third Embodiment) Hereinafter, a third embodiment of the present invention will be described. The same components as those in the second embodiment are denoted by the same reference numerals, and the description of the components will be omitted.

As shown in FIG. 7, the third embodiment has a configuration similar to that of the second embodiment,
In addition, the bent base material Y has two cut lines L1-A and L1-B, respectively, and the bent base material X has a convex shape and the bent base material Y has a concave shape as a whole. Angles θ1 and θ2
Means θ1 = θ2 and θ1 + θ2 = 90 ° (bending angle)
And θA = θB.

Here, the difference from the second embodiment is that
The point is that the angles θA and θB are acute angles.

According to such a structure, the cut line L
When 1-A and L2-A are joined and cut lines L1-B and L1-B are joined, cut lines L1-A and L1-B that form a pointed convex shape like a spear are Since the concaved cut lines L2-A and L2-B are fitted to each other, so-called wedge fitting is performed, and the stress from the longitudinal direction of the bent base material X or Y can be dispersed.
The fitting (joining) state can be held firmly, and even if the bent portion is softened by bending,
The relative positional relationship between the bent base material X and the bent base material Y can be maintained.

Further, similarly to the first and second embodiments, the step portion 12 is abutted against the ceiling wall 10D of the bent base material Y for positioning, and is joined as a mating surface.

The cut lines L1-A, L1-
B and the cut lines L2-A, L2
The concave shape formed by -B has a guide function, whereby the trajectory of the pair of bent substrates X and Y can be corrected to an appropriate position by bending movement during the bending operation.

In the third embodiment, the cut lines L1-A, L1-B, L2-A, and L2-B are also mating surfaces that abut each other. The surface to be applied (the mating surface)
Only the step portion 12 and the ceiling wall 10D are provided, and at least the cut lines L1-A and L2-A are provided with a guide function only,
The cut lines L1-B and L2-B can have a slight interval.

In the second and third embodiments, the convex and concave shapes formed by the cut lines L1-A and L1-B and the cut lines L2-A and L2-B are respectively made single. However, a plurality may be arranged.

Further, in the first to third embodiments, the hollow square pipe has been described. However, the present invention is not limited to this, and other steel materials such as an angle steel, an L square steel, a groove steel and the like may be used. Applicable. (Modification) A modification of the notch 26 in the first to third embodiments will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the first modification, as shown in FIG. 8, a triangular cutout groove 42 is formed at the bending position of the long material 10 by the side wall 10C.
Is formed.

As shown in FIG. 8, the lateral wall 10C is formed with a notched groove 42 which is cut in a triangular shape from both ends in the width direction. The width dimension b and the depth dimension f (depth dimension c + depth dimension e in the above embodiment) of the notch groove 42 are large enough to prevent swelling when bent.
The width dimension b and the depth dimension f of the notch groove 42 are, for example, 3 mm and 6 mm, respectively. In addition, the apex 42A of the notch groove 42 is located on the bending center line CL. Therefore, the bending process can be accurately performed along the line (bending center line CL) that is guided by the notch groove 42 and connects the apex 42A during the bending process.

In the first modification, the notch 24 is formed in the side wall 10C.
It is not necessary to separately form the cutout groove 26 and the triangular cutout groove 42. By forming only the triangular cutout groove 42 in the lateral wall 10C, it is possible to realize both prevention of bulging of the member and accurate bending. (Modification 2) In Modification 2, as shown in FIGS. 9A and 9B, guide grooves 4 each having a triangular cross section are provided on the front and back of the side wall 10C.
Alternatively, as shown in FIGS. 10A and 10B, guide holes 46 may be provided at predetermined intervals on a line connecting the vertices to the lateral wall 10C. With this configuration, the bending center line CL of the side wall 10C is formed.
The rigidity at the position along the line is reduced, and it is possible to bend at a predetermined position with higher accuracy.

The notch 4 is formed in the side wall 10C of the long material 10.
2 and the guide groove 4 along the bending center line CL.
4 or only the guide hole 46 may be provided alone. (Modification 3) As shown in FIG. 11, a triangular cutout groove 48 is formed in a portion of the long material 10 according to the first embodiment where the slit-shaped cutout groove 26 was formed, and a vertex of the triangle is formed. By positioning 48A on the bending center line CL, the accuracy of the bending line is obtained. Also in this case, a guide groove or a guide hole can be provided along the bending center line CL.

[0070]

As described above, according to the present invention, at least one side can be positioned in a joining side composed of a plurality of sides that are continuous at an angle, and the dimensional accuracy of the cutting for bending can be reduced. It has an excellent effect that it can be roughened.

Further, in addition to the above-described effects, there is an effect that the stress applied to the joint due to the load applied after the bending is appropriately dispersed and can be received by the entire joint.

[Brief description of the drawings]

FIG. 1 is a side view of a long material according to a first embodiment.

FIG. 2 is a bottom view of the long material according to the first embodiment.

FIG. 3 is an enlarged view of a notch groove portion according to the first embodiment.

FIG. 4 is a side view of the long material according to the first embodiment after bending.

FIG. 5 is a perspective view of a long material according to the first embodiment.

FIG. 6 is a side view of a long material according to a second embodiment.

FIG. 7 is a side view of a long material according to a third embodiment.

FIG. 8 is a bottom view of a long material according to a first modification.

9A and 9B are long materials according to Modification Example 2, wherein FIG. 9A is a bottom view and FIG. 9B is a cross-sectional view taken along line IXB-IXB.

10A and 10B are long materials according to Modification Example 2, wherein FIG. 10A is a bottom view and FIG. 10B is a cross-sectional view taken along line XB-XB.

FIG. 11 is a bottom view of a long material according to a third modification.

[Explanation of symbols]

 Reference Signs List 10 long material 10A vertical wall 10B vertical wall 10C side wall 10D ceiling wall 12 stepped part X bent base material Y bent base material L1 cut line L2 cut line

Claims (6)

[Claims] 1. A part of another wall member formed by a plurality of wall members that are continuous in an angle shape, and a part of another wall member is cut off while at least one of the wall members is left for connection. And a length capable of bending the connecting wall member at a predetermined angle around a bent base end so that the cut portions of the pair of bent substrates are on the inside. A length member having a pair of opposing sides formed at portions opposing each other when the respective bent base materials are bent at a predetermined angle, wherein the pair of opposing sides and the bending base end By setting the angle formed with the predetermined bending angle, a part of the wall member of the other bent base material is positioned continuously for the opposite side of the one bent base material for positioning. A long material formed to be a mating surface to be abutted. 2. A plurality of wall members formed in a continuous shape at an angle, and a portion of another wall member is cut off while at least one wall member is left for connection, and a pair of the wall members is cut off at the cut portion. And a length capable of bending the connecting wall member at a predetermined angle around a bent base end so that the cut portions of the pair of bent substrates are on the inside. A length member having a pair of opposing sides formed at portions opposing each other when the respective bent base materials are bent at a predetermined angle, wherein the pair of opposing sides and the bending base end And the bending angle is set to the predetermined bending angle, a bending portion is formed in the middle portion, and by forming the bending portion, the bending portion is connected to the opposite side of the one bending base material and the other bending portion is formed. A part of the wall member of the base material becomes a mating surface that is abutted for positioning. Long material, characterized in that the formed. 3. A portion continuous with the pair of opposing sides formed by the bending portion is formed so as to receive stress from a direction perpendicular to an axis of the pair of bent base materials. The long material according to claim 2, wherein 4. The long material according to claim 1, wherein a part or the whole of the pair of opposing sides has a function as an abutment surface. 5. The notch according to claim 1, wherein the wall member has a notch corresponding to a bending angle of the cut portion to prevent bulging of the member due to bending. Long material described in the item. 6. A folding position setting means for setting a folding line on the wall member.
The long material according to any one of claims 5 to 6.