JP4813936B2 - Pipe with mounting piece - Google Patents

Description

  The present invention relates to a pipe with an attachment piece joined to a pipe in a state where an attachment piece attached to another member protrudes to the outside of the pipe, and a manufacturing method thereof.

  As a known method of joining a flange attached to another member to a pipe, for example, methods disclosed in the following two documents 1 and 2 are known (see Patent Document 1-2).

  Document 1 (Japanese Patent Publication No. 2003-503658) discloses a method of joining a flange to a pipe by inserting the pipe into the flange and then expanding the pipe.

Document 2 (Japanese Patent Laid-Open No. 6-174159) discloses a method of joining a flange to a pipe by bending back the inner peripheral edge of the flange and locking it to the end of the pipe.
Special table 2003-503658 gazette JP-A-6-174159

  However, the methods disclosed in the above documents have the following difficulties.

  In the methods of Documents 1 and 2, since the flange is formed over the entire circumference of the pipe, the weight of the flanged pipe increases. Furthermore, the method of Document 2 has a drawback in that the manufacturing method is expensive because the method of joining the flange to the pipe is complicated.

  The present invention has been made in view of the above-described technical background, and an object thereof is to provide a pipe with a mounting piece that can be manufactured at low cost and can be reduced in weight, and a method for manufacturing the pipe. is there.

  The present invention provides the following means.

[1] A pipe with an attachment piece joined to the pipe in a state where the attachment piece attached to another member protrudes outside the pipe,
A base plate portion bent with respect to the mounting piece is integrally provided at the base end of the mounting piece,
While the pipe is inserted into the reinforcing ring, the reinforcing ring is joined to the pipe by expanding at least one peripheral wall portion of the insertion portion of the pipe into the reinforcing ring and the vicinity thereof,
A pipe with an attachment piece, wherein the attachment piece is joined to the pipe by sandwiching the substrate portion of the attachment piece between the pipe and the reinforcing ring.

[2] On the inner peripheral surface of the reinforcing ring, a fitting recess into which the board portion of the mounting piece is fitted is provided,
2. The pipe with attachment piece according to item 1, wherein the substrate portion of the attachment piece is sandwiched between the pipe and the reinforcing ring in a state where the substrate portion is fitted in the fitting recess.

[3] The depth of the fitting recess is set smaller than the thickness of the substrate portion of the mounting piece,
The mounting plate is fitted in the fitting recess so that the board portion of the mounting plate protrudes inward from the inner peripheral surface of the reinforcing ring.
3. The pipe with attachment piece according to item 2, wherein the peripheral wall portion of the pipe is engaged with the protruding portion of the base plate portion of the attachment piece in the circumferential direction.

[4] The depth of the fitting recess is set to be greater than the thickness of the board portion of the mounting piece,
The mounting plate is fitted in the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring,
The pipe with a mounting piece according to the preceding item 2, wherein the peripheral wall portion of the pipe is engaged with the recess portion of the inner peripheral surface of the reinforcing ring in the circumferential direction.

  [5] The pipe with attachment piece according to any one of the above items 2 to 4, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion. .

  [6] The pipe with a mounting piece according to any one of the preceding items 1 to 5, wherein a peripheral wall portion of the pipe is engaged with a first engaging recess provided on an inner peripheral surface of the reinforcing ring in a circumferential direction.

  [7] The pipe with a mounting piece according to the above item 6, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the first engaging recess.

[8] On the inner circumferential surface of the reinforcing ring, a plurality of fitting recesses into which the board portion of the mounting piece is fitted are provided side by side in the circumferential direction.
The base plate portion of the mounting piece is sandwiched between the pipe and the reinforcing ring in a state of being fitted into the other fitting recesses, leaving at least one fitting recess among the plurality of fitting recesses. And
The pipe with a mounting piece according to the preceding item 1, which is engaged in a circumferential direction with a fitting recess in which the peripheral wall portion of the pipe remains.

[9] The depth of the fitting recess is set smaller than the thickness of the substrate portion of the mounting piece,
The mounting plate is fitted in the fitting recess so that the board portion of the mounting plate protrudes inward from the inner peripheral surface of the reinforcing ring.
9. The pipe with a mounting piece according to item 8, wherein the peripheral wall portion of the pipe is engaged with the protruding portion of the base plate portion of the mounting piece in the circumferential direction.

[10] The depth of the fitting recess is set to be larger than the thickness of the board portion of the mounting piece,
The mounting plate is fitted in the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring,
9. The pipe with attachment piece according to item 8, wherein the peripheral wall portion of the pipe is engaged with a recess portion on the inner peripheral surface of the reinforcing ring in the circumferential direction.

  [11] The pipe with attachment piece according to any one of the above items 8 to 10, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion. .

  [12] The pipe with a mounting piece according to any one of the preceding items 1 to 11, wherein a peripheral wall portion of the pipe is engaged in a circumferential direction with a first engagement convex portion provided on an inner peripheral surface of the reinforcing ring.

  [13] The pipe with attachment piece according to any one of the preceding items 1 to 12, wherein the base plate portion of the attachment piece is engaged in the axial direction with a second engagement recess provided on the inner peripheral surface of the reinforcing ring.

  [14] The pipe with attachment piece as recited in the aforementioned Item 13, wherein the base plate portion of the attachment piece and the peripheral wall portion of the pipe are engaged with the second engagement recess in the axial direction.

  [15] The pipe with attachment piece according to any one of the preceding items 1 to 14, wherein the base plate portion of the attachment piece is engaged with a second engagement convex portion provided on the inner peripheral surface of the reinforcing ring in the axial direction.

  [16] The pipe with attachment piece according to item 15, wherein the base plate portion of the attachment piece and the peripheral wall portion of the pipe are engaged with the second engagement convex portion in the axial direction.

[17] A locking claw is provided at the tip of the substrate portion of the mounting piece,
The pipe with attachment piece according to any one of the preceding items 1 to 16, wherein the locking claw is locked to the side edge of the reinforcing ring.

  [18] The pipe with attachment piece according to any one of the above items 1 to 17, wherein the attachment piece is formed with a reinforcing portion that increases the rigidity of the attachment piece.

  [19] The pipe with an attachment piece according to any one of the preceding items 1 to 18, wherein the attachment piece is provided with a support plate portion that supports the attachment piece in a fall-preventing state.

  [20] The pipe with an attachment piece according to any one of items 1 to 19, wherein the attachment piece is formed in a twisted state in the protruding direction.

  [21] With the attachment piece according to any one of the preceding items 1 to 20, wherein the peripheral wall portion of the pipe is engaged with a third engagement convex portion provided on a contact surface of the attachment piece with the pipe of the substrate portion. pipe.

  [22] The pipe with attachment piece according to any one of the preceding items 1 to 21, wherein the peripheral wall portion of the pipe is engaged with a third engagement recess provided on the contact surface of the attachment piece with the pipe of the substrate portion. .

[23] The cross-sectional shape of the outer peripheral surface of the pipe is a polygonal shape,
23. The pipe with attachment piece according to any one of the preceding items 1 to 22, wherein the cross-sectional shape of the inner peripheral surface of the reinforcing ring is a polygonal shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe.

  [24] The pipe with a mounting piece according to any one of the preceding items 1 to 23, wherein a partition wall portion extending in the axial direction for vertically partitioning a hollow portion of the pipe is provided on the pipe.

[25] A method for manufacturing a pipe with an attachment piece, wherein an attachment piece attached to another member is joined to the pipe in a state of protruding to the outside of the pipe,
A base plate portion bent with respect to the mounting piece is integrally provided at the base end of the mounting piece,
With the pipe inserted into the reinforcement ring and the base plate portion of the mounting piece disposed between the pipe and the reinforcement ring, at least one peripheral wall portion of the pipe insertion portion into the reinforcement ring and the vicinity thereof is expanded. A method of manufacturing a pipe with an attachment piece, wherein the attachment piece is joined to the pipe by processing.

[26] A fitting recess into which the board portion of the mounting piece is fitted is provided on the inner peripheral surface of the reinforcing ring,
26. The method of manufacturing a pipe with an attachment piece according to the above item 25, wherein the substrate portion of the attachment piece is disposed between the pipe and the reinforcing ring in a state of being fitted in the fitting recess, and the peripheral wall portion of the pipe is expanded in this state. .

[27] The depth of the fitting recess is set smaller than the thickness of the substrate portion of the mounting piece,
27. A method of manufacturing a pipe with an attachment piece according to item 26, wherein the substrate portion of the attachment plate is fitted into the fitting recess in a state where the substrate portion protrudes inward from the inner peripheral surface of the reinforcing ring.

[28] The depth of the fitting recess is set to be greater than the thickness of the substrate portion of the mounting piece,
27. The method for manufacturing a pipe with attachment piece according to item 26, wherein the substrate portion of the attachment plate is fitted into the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring.

  [29] The pipe with attachment piece according to any one of the above items 26 to 28, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion. Manufacturing method.

  [30] The method for manufacturing a pipe with a mounting piece according to any one of the preceding items 25 to 29, wherein a first engagement concave portion in which a peripheral wall portion of the pipe is engaged in a circumferential direction is provided on an inner peripheral surface of the reinforcing ring.

  [31] The method for manufacturing a pipe with attachment piece according to the above item 30, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the first engagement recess.

[32] On the inner circumferential surface of the reinforcing ring, a plurality of fitting recesses into which the board portion of the mounting piece is fitted are provided side by side in the circumferential direction.
26. The above-described item 25, wherein the base plate portion of the mounting piece is disposed between the pipe and the reinforcing ring in a state of being fitted in the other fitting recesses while leaving at least one fitting recess among the plurality of fitting recesses. Manufacturing method of pipe with mounting piece.

[33] The depth of the fitting recess is set smaller than the thickness of the substrate portion of the mounting piece,
33. A method of manufacturing a pipe with a mounting piece according to the preceding item 32, in which the base plate portion of the mounting plate is fitted into the fitting recess in a state of protruding from the inner peripheral surface of the reinforcing ring.

[34] The depth of the fitting recess is set to be greater than the thickness of the board portion of the mounting piece,
33. A method of manufacturing a pipe with an attachment piece according to item 32, wherein the substrate portion of the attachment plate is fitted into the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring.

  [35] The pipe with a mounting piece according to any one of the preceding items 32 to 34, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion. Manufacturing method.

  [36] The method for manufacturing a pipe with a mounting piece according to any one of the above items 25 to 35, wherein a first engagement convex portion is provided on the inner peripheral surface of the reinforcing ring to engage the peripheral wall portion of the pipe in the circumferential direction. .

  [37] The method for manufacturing a pipe with a mounting piece according to any one of the above items 25 to 36, wherein a second engagement recess is provided on the inner peripheral surface of the reinforcing ring to engage the base plate portion of the mounting piece in the axial direction. .

  [38] The method for manufacturing a pipe with an attachment piece as recited in the aforementioned Item 37, wherein the second engagement recess is one in which the attachment piece, the substrate portion and the peripheral wall portion of the pipe are engaged in the axial direction.

  [39] Manufacture of a pipe with a mounting piece according to any one of the preceding items 25 to 38, wherein a second engagement convex portion is provided on the inner peripheral surface of the reinforcing ring to engage the base plate portion of the mounting piece in the axial direction. Method.

  [40] The method for manufacturing a pipe with a mounting piece according to the preceding item 39, wherein the second engaging protrusion is configured such that the base plate portion of the mounting piece and the peripheral wall portion of the pipe are engaged in the axial direction.

  [41] The method for manufacturing a pipe with a mounting piece according to any one of the above items 25 to 40, wherein a locking claw for locking to a side edge portion of the reinforcing ring is provided at a tip portion of the substrate portion of the mounting piece.

  [42] The method for manufacturing a pipe with attachment piece according to any one of the above items 25 to 41, wherein the attachment piece is provided with a reinforcing portion that increases the rigidity of the attachment piece.

  [43] The method for manufacturing a pipe with an attachment piece according to any one of the preceding items 25 to 42, wherein the attachment piece is provided with a support plate portion that supports the attachment piece in a fall-prevented state.

  [44] The method for manufacturing a pipe with an attachment piece according to any one of items 25 to 43, wherein the attachment piece is formed in a state of being twisted with respect to the protruding direction.

  [45] The pipe with attachment piece according to any one of the above items 25 to 44, wherein a third engagement convex portion with which the peripheral wall portion of the pipe engages is provided on a surface of the attachment piece in contact with the pipe. Manufacturing method.

  [46] The pipe with attachment piece according to any one of the above items 25 to 45, wherein a third engagement recess for engaging the peripheral wall portion of the pipe is provided on a contact surface of the attachment piece with the pipe of the substrate portion. Production method.

[47] The cross-sectional shape of the outer peripheral surface of the pipe is a polygonal shape,
47. A method of manufacturing a pipe with attachment piece according to any one of the preceding items 25 to 46, wherein the cross-sectional shape of the inner peripheral surface of the reinforcing ring is a polygonal shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe.

  [48] The method for manufacturing a pipe with a mounting piece according to any one of the above items 25 to 47, wherein a partition wall portion extending in the axial direction for vertically partitioning a hollow portion of the pipe is provided on the pipe.

  [49] Any of the preceding items 25 to 48, wherein the expanding process is performed by an expanding process using a hydraulic pressure as a pressure medium, an expanding process using a rubber as a pressure medium, an expanding process using a molding roll, or an expanding process using a mold. The manufacturing method of the pipe with an attachment piece of description.

  The present invention has the following effects.

  In the invention of [1], the pipe can be reinforced by the reinforcing ring at the time of expanding. Furthermore, the attachment work of the attachment piece to the pipe can be easily performed, so that the pipe with the attachment piece can be manufactured at a low cost.

  Furthermore, since the number of attachment pieces joined to the pipe and the width of the attachment pieces can be arbitrarily selected or determined as necessary, the weight of the pipe with attachment pieces can be reduced.

  In the invention of [2], since the base plate portion of the attachment piece is sandwiched between the pipe and the reinforcing ring in a state of being fitted in the fitting recess, the displacement of the attachment piece in the circumferential direction of the pipe is prevented. It can be surely prevented.

  In the invention of [3], since the peripheral wall portion of the pipe is engaged with the protruding portion of the substrate portion of the attachment piece in the circumferential direction, it is possible to increase the bonding strength of the attachment piece with respect to the load in the circumferential direction of the pipe.

  In the invention of [4], since the peripheral wall portion of the pipe is engaged with the recess portion on the inner peripheral surface of the reinforcing ring in the circumferential direction, it is possible to increase the bonding strength of the reinforcing ring against the load in the circumferential direction of the pipe.

  In the invention of [5], since the bulging portion bulging outward in the radial direction is formed on the portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion, the position of the fitting concave portion of the reinforcing ring The strength at can be improved.

  In the invention of [6], since the peripheral wall portion of the pipe is engaged in the circumferential direction with the first engaging recess provided on the inner peripheral surface of the reinforcing ring, the joint strength of the reinforcing ring with respect to the circumferential load of the pipe Can be increased.

  In the invention of [7], since the bulging portion bulging outward in the radial direction is formed on the outer peripheral surface of the reinforcing ring on the side opposite to the first engaging recess, the first engagement of the reinforcing ring. The strength at the position of the joint recess can be improved.

  In the invention of [8], the pipe and the reinforcing ring are mounted in a state in which the base plate portion of the mounting piece is fitted in the other fitting recesses, leaving at least one fitting recess among the plurality of fitting recesses. Therefore, it is possible to reliably prevent the displacement of the mounting piece in the circumferential direction of the pipe.

  Further, since the peripheral wall portion of the pipe is engaged with the remaining fitting recess in the circumferential direction, it is possible to increase the joining strength of the reinforcing ring against the load in the circumferential direction of the pipe.

  Furthermore, a fitting recess at a desired position can be selected from the plurality of fitting recesses of the reinforcing ring, and the reinforcing ring can be shared.

  In the invention of [9], since the peripheral wall portion of the pipe is engaged with the protruding portion of the base plate portion of the attachment piece in the circumferential direction, the joining strength of the attachment piece against the load in the circumferential direction of the pipe can be increased.

  In the invention of [10], since the peripheral wall portion of the pipe is engaged with the recess portion of the inner peripheral surface of the reinforcing ring in the circumferential direction, the bonding strength of the reinforcing ring against the circumferential load of the pipe can be increased.

  In the invention of [11], since the bulging portion bulging outward in the radial direction is formed on the outer circumferential surface of the reinforcing ring on the side opposite to the fitting concave portion, the position of the fitting concave portion of the reinforcing ring The strength at can be improved.

  In the invention of [12], since the peripheral wall portion of the pipe is engaged with the first engaging convex portion provided on the inner peripheral surface of the reinforcing ring in the circumferential direction, the reinforcing ring is joined to the load in the circumferential direction of the pipe. Strength can be increased.

  In the invention of [13], the base plate portion of the mounting piece is engaged with the second engaging recess provided on the inner peripheral surface of the reinforcing ring in the axial direction. It is possible to reliably prevent problems that are pulled out from between the two.

  In the invention of [14], since the base plate portion of the mounting piece and the peripheral wall portion of the pipe are engaged with the second engaging recess in the axial direction, the base plate portion of the mounting piece is extracted from between the pipe and the reinforcing ring. In addition, the joint strength of the attachment piece and the joint strength of the reinforcing ring with respect to the axial load of the pipe can be increased.

  In the invention of [15], the base plate portion of the mounting piece is engaged with the second engaging convex portion provided on the inner peripheral surface of the reinforcing ring in the axial direction, so that the base plate portion of the mounting piece is the pipe and the reinforcing ring. It is possible to reliably prevent problems that are pulled out from between the two.

  In the invention of [16], the base plate portion of the mounting piece and the peripheral wall portion of the pipe are engaged with the second engaging convex portion in the axial direction, so that the base plate portion of the mounting piece is removed from between the pipe and the reinforcing ring. In addition to being able to reliably prevent malfunctions, it is possible to increase both the joining strength of the mounting piece and the joining strength of the reinforcing ring with respect to the axial load of the pipe.

  In the invention of [17], the engaging claw is provided at the tip of the substrate portion of the attachment piece, and the engagement claw is engaged with the side edge portion of the reinforcing ring. Can be reliably prevented from being pulled out from between the reinforcing ring.

  In the invention of [18], the rigidity of the mounting piece can be increased by the reinforcing portion (eg, reinforcing bead, reinforcing rib).

  In the invention [19], the mounting plate can be prevented from falling by the support plate.

  In the invention [20], the orientation of the mounting piece can be changed.

  In the invention of [21], since the peripheral wall portion of the pipe is engaged with the third engaging convex portion provided on the contact surface of the mounting portion with the pipe, the bonding strength of the mounting piece is increased. it can.

  In the invention of [22], since the peripheral wall portion of the pipe is engaged with the third engagement recess provided on the contact surface of the base plate portion of the attachment piece with the pipe, the joining strength of the attachment piece can be increased. .

  In the invention of [23], the problem that the reinforcing ring rotates in the circumferential direction of the pipe can be reliably prevented.

  In the invention [24], since the pipe is reinforced by the partition wall portion, the rigidity of the pipe with the attachment piece can be improved.

  The inventions [25] to [48] have the same effects as the effects of the above inventions [1] to [24], respectively.

  In the invention of [49], the expanding process can be reliably performed.

  Several preferred embodiments of the present invention will now be described with reference to the drawings.

  1-7 is a figure for demonstrating 1st Embodiment of this invention. As shown in FIG. 1, the pipe with attachment piece (P1) according to the first embodiment includes a reinforcing ring (10) and at least one attachment piece (20). The reinforcing ring (10) reinforces the pipe (more specifically, the pipe body) (1). The attachment piece (20) is attached to another member (not shown). In the first embodiment, as shown in FIG. 2, the number of mounting pieces (20) is plural, and more specifically, eight.

  The pipe (1) is a round pipe, that is, the cross-sectional shapes of the inner peripheral surface and the outer peripheral surface of the pipe (1) are each circular.

  This pipe (1) is made of a material that can be compositionally deformed, and is made of metal when described in detail, and is made of aluminum or an aluminum alloy.

  However, in the present invention, the material of the pipe (1) is not limited to aluminum or an aluminum alloy. In addition, for example, steel materials, magnesium alloys, resins (including plastics), and the like are used as the material of the pipe (1).

  The length of the pipe (1) is set in a range of 200 to 1500 mm, for example. The outer diameter of the pipe (1) is set in the range of 25 to 100 mm, for example. The thickness of the pipe (1) is set in the range of 2 to 5 mm, for example. However, in the present invention, the length, outer diameter, and thickness of the pipe (1) are not limited to the above ranges.

  The reinforcing ring (10) has a short cylindrical shape, more specifically, a short cylindrical shape. That is, the cross-sectional shapes of the inner peripheral surface and the outer peripheral surface of the reinforcing ring (10) are basically circular. . Therefore, the cross-sectional shape of the inner peripheral surface of the reinforcing ring (10) is a shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe (1).

  The reinforcing ring (10) is preferably made of a material having a high Young's modulus and a low density, from the viewpoint of reducing the weight of the pipe (P1) with a mounting piece. In the present embodiment, the reinforcing ring (10) is made of metal, and more specifically, made of aluminum or an aluminum alloy. In particular, it is desirable that the reinforcing ring (10) is made of an extruded material of aluminum or an aluminum alloy because the reinforcing ring (10) can be manufactured efficiently and advantageously in terms of cost.

  However, in the present invention, the material of the reinforcing ring (10) is not limited to aluminum or an aluminum alloy. Other examples of the material of the reinforcing ring (10) include steel, magnesium alloy, resin (including plastic), composite resin (eg, carbon fiber reinforced plastic, FRP resin), and the like.

  The thickness of the reinforcing ring (10) is set to a thickness that can withstand the load applied to the reinforcing ring (10) when the pipe (1) is expanded. A specific example of the size of the reinforcing ring (10) is as follows.

  The width of the reinforcing ring (10) (that is, the axial length of the reinforcing ring (10)) is set in the range of, for example, 5 to 20 mm. The inner diameter of the reinforcing ring (10) is set in a range of 1.005 to 1.02 times the outer diameter of the pipe (1). The thickness of the reinforcing ring (10) is set in the range of 2 to 10 mm, for example. However, in the present invention, the width, the inner diameter, and the thickness of the reinforcing ring (10) are not limited to the above ranges.

  As shown in FIGS. 1 and 2, the eight attachment pieces (20) are arranged in the circumferential direction of the pipe (1) so as to protrude outward in the radial direction of the pipe (1) on the outside of the pipe (1). Are joined to the pipe (1) at regular intervals. These mounting pieces (20) have the same shape. In addition, (20a) is an attachment hole provided in the front-end | tip part of an attachment piece (20), In this 1st Embodiment, this attachment hole (20a) consists of bolt insertion holes, for example.

  The attachment piece (20) has a substantially rectangular shape in plan view. As shown in FIG. 6, the base part of the mounting piece (20) is integrally formed with a substrate part (21) bent substantially at a right angle (right angle) to the mounting piece (20). Therefore, the board | substrate part (21) is integrally formed by the base end part of the attachment piece (20) so that it may become a cross-sectional substantially L shape (L shape) with respect to the attachment piece (20).

  The mounting piece (20) is made of metal, and more specifically, is made of aluminum or an aluminum alloy.

  However, in the present invention, the material of the mounting piece (20) is not limited to aluminum or an aluminum alloy. In addition, for example, a steel material, a magnesium alloy, a resin (including a plastic) or the like is used as a material of the mounting piece (20). Further, in the present invention, the angle between the mounting piece (20) and the substrate portion (21) is not limited to a substantially right angle (right angle). Is set.

  In the first embodiment, the attachment piece (20) is manufactured by press molding, that is, manufactured by press molding a single plate material.

  However, in the present invention, the mounting piece (20) is not limited to be manufactured by press molding, but may be manufactured by, for example, extrusion or by die casting. It may be manufactured.

  The thicknesses of the mounting piece (20) and the substrate portion (21) are the same dimension, and are set in the range of 2 to 5 mm, for example. The length of the mounting piece (20) (that is, the length of the mounting piece (20) in the protruding direction) is set in the range of 30 to 100 mm, for example. The length of the substrate portion (21) (that is, the length of the substrate portion (21) in the axial direction of the pipe (1)) is set, for example, in the range of 5 to 20 mm. The width of the mounting piece (20) (that is, the length in the circumferential direction of the pipe (1) of the mounting piece (20)) is set smaller than the outer peripheral length of the pipe (1). Is set to a length less than half of the outer peripheral length, for example, in a range of 10 to 30 mm. In addition, the width of the substrate portion (21) (that is, the length in the circumferential direction of the pipe (1) of the substrate portion (21)) is set to be smaller than the outer peripheral length of the pipe (1). The length is set to be less than half the outer peripheral length of 1), for example, in the range of 10 to 30 mm. However, in the present invention, the thickness of the attachment piece (20) and the substrate portion (21), the length of the attachment piece (20), the length of the substrate portion (21), the width of the attachment piece (20), and the substrate portion The width of (21) is not limited to the above range.

  The configuration of the mounting piece-attached pipe (P1) will be briefly described as follows.

  That is, in this pipe with attachment piece (P1), as shown in FIGS. 1 to 5, the pipe (1) is inserted into the reinforcing ring (10). And in this state, as shown in FIGS. 2-5, the surrounding wall part (2a) of the insertion part to the reinforcement ring (10) of a pipe (1), and the surrounding wall part of the axial direction both sides vicinity of this insertion part (2b) and (2b) are expanded as the planned expansion processing portion (2), so that at least the peripheral wall portion (2a) of the pipe (1) is pressed against the inner peripheral surface of the reinforcing ring (10). As a result, the reinforcing ring (10) is joined to the pipe (1). Furthermore, the board portions (21) of the eight mounting pieces (20) are sandwiched between the pipe (1) and the reinforcing ring (10) in a circumferential direction of the pipe (1) at equal intervals. Thus, the attachment piece (20) is joined to the pipe (1).

  The configuration of the pipe with attachment piece (P1) will be described in detail as follows.

  As shown in FIGS. 3 and 6, the board portion (21) of the attachment piece (20) is curved corresponding to the outer peripheral surface of the pipe (1). Thereby, the contact surface (21b) with the pipe (1) of the board | substrate part (21) of an attachment piece (20) is formed in the curved surface corresponding to the outer peripheral surface of a pipe (1), and the pipe (1) It is in contact with the outer peripheral surface in a surface contact state. Further, the surface of the mounting piece (20) opposite to the contact surface (21a) of the substrate portion (21) is also formed into a curved surface.

  Moreover, as shown in FIG.4 and FIG.6, at the front-end | tip part of the board | substrate part (21) of an attachment piece (20), the board | substrate part (21) of an attachment piece (20) has a pipe (1) and a reinforcement ring (10). The latching claw (22) bent at a substantially right angle (right angle) with respect to the substrate portion (21) is integrally formed to prevent a problem of being pulled out from the space. And this latching claw (22) is in the state where the board | substrate part (21) of the attachment piece (20) was clamped between the pipe (1) and the reinforcement ring (10), as shown in FIG. The reinforcing ring (10) is locked to one of the side edges on both sides in the axial direction.

  As shown in FIG. 2 and FIG. 3, eight axially extending fittings are fitted to the inner peripheral surface of the reinforcing ring (10), and the base plate part (21) of each mounting piece (20) is fitted. Recesses (11) are provided at equal intervals in the circumferential direction. The cross-sectional shape of the fitting recess (11) is substantially U-shaped (U-shaped). The bottom surface of the fitting recess (11) is formed in a curved surface corresponding to the surface opposite to the contact surface (21b) with the pipe (1) of the substrate portion (21) of the mounting piece (20). Further, the width of the fitting recess (11) (that is, the length of the reinforcing recess (10) in the circumferential direction of the fitting recess (11)) corresponds to the width of the substrate portion (21) of the mounting piece (20). Is set to And the base plate part (21) of the mounting piece (20) is fitted between the pipe (1) and the reinforcing ring (10) in a fitting state in the fitting recess (11) in the width direction. It is pinched.

  Furthermore, as shown in FIG. 3, the depth d of the fitting recess (11) is set to be smaller than the thickness t of the substrate portion (21) of the mounting piece (20) (that is, d <t). . Then, the fitting portion (20) is fitted into the fitting recess (11) so that the substrate portion (21) protrudes to the inner side (that is, the pipe (1) side) than the inner peripheral surface of the reinforcing ring (10). Has been. (21a) is a protruding portion of the substrate portion (21) of the mounting piece (20) that protrudes inward from the inner peripheral surface of the reinforcing ring (10). Further, the peripheral wall portion (2a) of the pipe (1) is engaged with the protruding portion (21a) of the substrate portion (21) of the mounting piece (20) in the circumferential direction. The protruding height of the protruding portion (21a) is set in the range of 1 to 4 mm, for example. However, in the present invention, the protruding height is not limited to the above range.

  Further, the diameter of the reinforcing ring (10) on the outer surface of the reinforcing ring (10) opposite to the fitting recess (11) is such that the thickness of the reinforcing ring (10) is substantially constant (constant) in the circumferential direction. A bulging portion (12) bulging outward in the direction is integrally formed. The bulging height h of the bulging portion (12) is the same as the depth d of the fitting recess (11) (that is, h = d).

  Next, a method for manufacturing the pipe with attachment piece (P1) will be described below.

  First, the pipe (1) is inserted into the reinforcing ring (10), and the board portion (21) of the mounting piece (20) is fitted one by one into each fitting recess (11) of the reinforcing ring (10). In this state, the substrate portions (21) of the eight mounting pieces (20) are arranged (interposed) at equal intervals in the circumferential direction between the pipe (1) and the reinforcing ring (10). In this state, the board portion (21) of each mounting piece (20) is fitted into the fitting recess (11) so as to protrude inward from the inner peripheral surface of the reinforcing ring (10). Further, the locking claw (22) of the base plate portion (21) of the mounting piece (20) is locked to the side edge portion of the reinforcing ring (10).

  Next, as shown in FIG. 7, the peripheral wall portion (2 a) of the insertion portion of the pipe (1) into the reinforcing ring (10) and the peripheral wall portions (2 b) (2 b) of the insertion portion in the vicinity of both sides in the axial direction Are expanded at the same time by, for example, an expanding method using hydraulic pressure as a pressure medium. As a result, the peripheral wall portions (2a), (2b), and (2b) as the expansion processing scheduled portion (2) of the pipe (1) are plastically deformed so as to expand radially outward. As a result, the reinforcing ring (10) is 1), and the base plate portion (21) of the mounting piece (20) is sandwiched between the pipe (1) and the reinforcing ring (10), so that the mounting piece (20) is connected to the pipe (1). ). Further, as shown in FIG. 2 and FIG. 3, the expanding process allows the peripheral wall portion (2 a) of the insertion portion of the pipe (1) into the reinforcing ring (10) to become the base plate portion (21) of the attachment piece (20). ) Bulges toward the step between the protruding portion (21a) and the inner peripheral surface of the reinforcing ring (10) on both sides in the circumferential direction of the protruding portion (21a), thereby the peripheral wall portion of the pipe (1) (2a) engages the protruding portion (21a) in the circumferential direction.

  The expanding method (also referred to as a hydraulic expansion method) using hydraulic pressure as a pressure medium used in the first embodiment is a known method, and this processing method will be briefly described as follows.

  First, as shown in FIG. 7, in the entire peripheral wall portion of the pipe (1), a portion other than the planned expansion portion (2), that is, a portion of the pipe (1) that is not expanded (non-expanded portion) Restraining is performed from the outside by the restraining molds (31) and (31) of the expanding apparatus (30). Further, both ends of the pipe (1) are sealed in a liquid-tight state with a sealing tool (not shown), and a liquid such as water is injected into the pipe (1) as a pressure medium. Next, in this state, by applying pressure (P) to the liquid, the expanded processing scheduled portion (2) of the pipe (1) is expanded (bulged) radially outward. In this way, the expanding process is performed. In FIG. 7, (Q) is the central axis of the pipe (1).

  Here, in the present invention, the expanding processing method is limited to the expanding processing method using the above-described hydraulic pressure as a pressure medium as long as the expanding processing scheduled portion (2) of the pipe (1) is expanded. In addition, for example, an expanding method using rubber as a pressure medium (also referred to as a rubber tube expanding method), an expanding method using a molding roll, and an expanding method using a mold may be used.

  In addition, all the other expanding methods are also well-known methods, and this processing method will be briefly described as follows.

  The expanding processing method using rubber as a pressure medium is a method using rubber instead of a liquid such as water as the pressure medium in the expanding processing method using the hydraulic pressure as a pressure medium.

  The expanding process using the forming roll is the process of expanding the pipe (1) by moving a plurality of rolls (forming roll) arranged inside the pipe (1) outward in the radial direction of the pipe (1). In this method, the planned part (2) is expanded.

  The expanding process using a mold is to expand a pipe (1) by moving a plurality of divided molds arranged inside the pipe (1) outward in the radial direction of the pipe (1). In this method, the planned part (2) is expanded.

  By the above procedure, the desired pipe with attachment piece (P1) shown in FIG. 1 can be manufactured.

  A method for connecting the pipe with attachment piece (P1) to another member is as follows. That is, a bolt (not shown) is inserted as a fastener into a mounting hole (bolt insertion hole) (20a) at the tip of the attachment piece (20) and a bolt insertion hole (not shown) of another member. And a pipe (1) is connected with another member via an attachment piece (20) by screwing a nut (not shown) with this bolt.

  Thus, the pipe with attachment piece (P1) has the following advantages.

  That is, in the state where the pipe (1) is inserted into the reinforcing ring (10), the peripheral wall portion (2a) of the insertion portion into the reinforcement ring (10) of the pipe (1) and the vicinity of both sides in the axial direction of the insertion portion By expanding the peripheral wall portions (2b) and (2b) of the portion, the reinforcing ring (10) is joined to the pipe (1). Therefore, the pipe (1) can be reinforced by the reinforcing ring (10) during the expanding process.

  Furthermore, the attachment piece (20) is joined to the pipe (1) by sandwiching the substrate portion (21) of the attachment piece (20) between the pipe (1) and the reinforcing ring (10). . Therefore, the substrate portion (21) of the mounting piece (20) is disposed between the pipe (1) and the reinforcing ring (10) in advance during the expansion process, and in this state, the pipe (1) The mounting piece (20) can be joined to the pipe (1) by expanding the peripheral wall portions (2a) (2b) (2b). Therefore, the attachment work of the attachment piece (20) to the pipe (1) can be easily performed, and thus the pipe with attachment piece (P1) can be manufactured at low cost.

  Further, as will be described later, the number of attachment pieces (20) to be joined to the pipe (1) and the width of the attachment pieces (20) can be arbitrarily selected or determined as necessary. P1) can be reduced in weight.

  Further, the base plate portion (21) of the mounting piece (20) is sandwiched between the pipe (1) and the reinforcing ring (10) in a state of being fitted in the fitting recess (11) of the reinforcing ring (10). Since it is attached, it is possible to reliably prevent displacement of the mounting piece (20) in the circumferential direction of the pipe (1).

  The depth d of the fitting recess (11) is set to be smaller than the wall thickness t of the substrate portion (21) of the mounting piece (20), and the peripheral wall portion (2a) of the pipe (1) is attached to the mounting piece. Since the protrusion part (21a) of the board | substrate part (21) of (20) is circumferentially engaged, the joint strength of the attachment piece (20) with respect to the load of the circumferential direction of a pipe (1) can be increased.

  Moreover, since the bulging part (12) which bulged to the radial direction outer side is formed in the part on the opposite side to each fitting recessed part (11) in the outer peripheral surface of a reinforcement ring (10), a reinforcement ring ( The strength at the position of the fitting recess (11) of 10) can be improved.

  Moreover, since the latching claw (22) of the board | substrate part (21) of an attachment piece (20) is latched by the side edge part of the reinforcement ring (10), the board | substrate part (21) of an attachment piece (20) It is possible to reliably prevent a problem that the pipe (1) and the reinforcing ring (10) are pulled out.

  Thus, in the pipe (P1) with attachment pieces of the first embodiment, as shown in FIG. 8, the number of attachment pieces (20) to be joined to the pipe (1) is arbitrarily changed as necessary. be able to. FIG. 8 shows an example in which the number of attachment pieces (20) to be joined to the pipe (1) is four. However, in the present invention, the number of attachment pieces (20) to be joined to the pipe (1) is not limited to four, but may be one, for example, two, Three, five, six or seven may be used.

  In the pipe with attachment piece (P1) shown in FIG. 8, the base plate portion (21) of the four attachment pieces (20) is formed of four of the eight fitting recesses (11) of the reinforcing ring (10). One is fitted into each of the other four fitting recesses (11), leaving the fitting recess (11), and in this state, the peripheral wall portion (2a) of the pipe (1) is expanded. As a result, the substrate portions (21) of the four attachment pieces (20) are sandwiched between the pipe (1) and the reinforcing ring (10), whereby the four attachment pieces (20) are connected to the pipe. It is joined to (1).

  Furthermore, the peripheral wall portion (2a) of the pipe (1) is expanded, so that each fitting recess (11) in which the peripheral wall portion (2a) of the pipe (1) remains (that is, the substrate of the mounting piece (20)). The portion (21) bulges into the fitting recess (not fitted), and thereby engages with each fitting recess (11) where the peripheral wall portion (2a) of the pipe (1) remains in the circumferential direction. is doing. This remaining fitting recess (11) corresponds to the first engagement recess (14) with which the peripheral wall (2a) of the pipe (1) is engaged in the circumferential direction. Further, the peripheral wall portion (2a) of the pipe (1) is engaged with the protruding portion (21a) of the substrate portion (21) of the mounting piece (20) in the circumferential direction.

  The other configuration of the pipe with attachment piece (P1) is the same as that of the first embodiment.

  In this pipe with attachment piece (P1), the base plate part (21) of the attachment piece (20) has four fitting recesses (11) out of the eight fitting recesses (11), and the other four pieces. Since it is sandwiched between the pipe (1) and the reinforcing ring (10) while being fitted in the fitting recess (11), the mounting piece (20) in the circumferential direction of the pipe (1) In addition to being able to reliably prevent displacement, the peripheral wall portion (2a) of the pipe (1) is also engaged in the circumferential direction with the fitting concave portion (11) (that is, the first engaging concave portion (14)). Therefore, the joint strength of the reinforcing ring (10) with respect to the circumferential load of the pipe (1) can be increased.

  Thus, in this pipe with attachment piece (P1), it is possible to arbitrarily select the fitting recess (11) at a desired position from among the eight fitting recesses (11) of the reinforcing ring (10). In addition, the reinforcement ring (10) can be shared.

  Thus, in the pipe with attachment piece (P1) of the first embodiment, the bottom surface of the fitting recess (11) of the reinforcing ring (10) is formed in a curved surface as described above (see FIG. 3). In the present invention, as shown in FIG. 9, the bottom surface of the fitting recess (11) may be formed in a flat shape, or may be formed in other shapes. Moreover, in this invention, the outer surface of the bulging part (12) may be formed flat, and may be formed in another shape.

  Next, pipes with attachment pieces according to some other embodiments of the present invention will be described below with reference to FIGS. In these drawings, the same reference numerals are given to the same elements as those of the pipe with attachment piece (P1) of the first embodiment.

  FIG.10 and FIG.11 is a figure explaining the pipe (P2) with an attachment piece which concerns on 2nd Embodiment of this invention.

  In this pipe with attachment piece (P2), the depth d of the fitting recess (11) of the reinforcing ring (10) is set to be the same as the thickness t of the substrate part (21) of the attachment piece (20). (Ie d = t). And the board | substrate part (21) of the attachment piece (20) is fitted in this fitting recessed part (11). Therefore, in this pipe (P2) with an attachment piece, the protrusion part of the board | substrate part (21) of an attachment piece (20) does not exist. Therefore, under the state where the attachment piece (20) is joined to the pipe (1), the peripheral wall portion (2a) of the pipe (1) is engaged with the substrate portion (21) of the attachment piece (20) in the circumferential direction. It does n’t match.

  The other configuration of the pipe with attachment piece (P2) is the same as that of the first embodiment (P1).

  FIG.12 and FIG.13 is a figure explaining the pipe (P3) with an attachment piece which concerns on 3rd Embodiment of this invention.

  In this pipe with attachment piece (P3), the depth d of the fitting recess (11) of the reinforcing ring (10) is set larger than the wall thickness t of the substrate part (21) of the attachment piece (20). (Ie d> t). And the board | substrate part (21) of the attachment piece (20) is fitted in this fitting recessed part (11) in the state dented with respect to the internal peripheral surface of the reinforcement ring (10). That is, in the state where the base plate portion (21) of the mounting piece (20) is fitted in the fitting recess (11), the position of the fitting recess (11) on the inner peripheral surface of the reinforcing ring (10) is A recess (13) corresponding to the difference (ie, dt) between the depth d of the fitting recess (11) and the thickness t of the substrate portion (21) of the mounting piece (20) is formed. And the peripheral wall part (2a) of the pipe (1) is expanded, so that the peripheral wall part (2a) of the pipe (1) bulges into the hollow part (13). ) Is engaged with the recess (13) in the circumferential direction.

  The other structure of the pipe with attachment piece (P3) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P3), the peripheral wall portion (2a) of the pipe (1) is engaged with the recess (13) on the inner peripheral surface of the reinforcing ring (10) in the circumferential direction. ) Can increase the bonding strength of the reinforcing ring (10) with respect to the circumferential load.

  FIG.14 and FIG.15 is a figure explaining the pipe (P4) with an attachment piece which concerns on 4th Embodiment of this invention.

  In this pipe with attachment piece (P4), no fitting recess is provided on the inner peripheral surface of the reinforcing ring (10). Moreover, the bulging part is not provided in the outer peripheral surface of the reinforcement ring (10).

  The other configuration of the pipe with attachment piece (P4) is the same as that of the first embodiment (P1).

  FIG. 16 is a view for explaining a pipe with attachment piece (P5) according to the fifth embodiment of the present invention.

  In this pipe with attachment piece (P5), the depth d of the fitting recess (11) of the reinforcing ring (10) is the same as that of the second embodiment (P2) (see FIGS. 10 and 11). It is set to be the same as the wall thickness t of the substrate portion (21) of the mounting piece (20) (that is, d = t). And the board | substrate part (21) of the attachment piece (20) is fitted in this fitting recessed part (11). Therefore, in this pipe with attachment piece (P5), the protruding part of the substrate part (21) of the attachment piece (20) does not exist. Therefore, the peripheral wall portion (2a) of the pipe (1) is not engaged with the substrate portion (21) of the attachment piece (20) in the circumferential direction. Moreover, the bulging part is not provided in the part on the opposite side to the fitting recessed part (11) in the outer peripheral surface of a reinforcement ring (10).

  Furthermore, a plurality of (eight in the present embodiment) first engaging projections (15) extending in the axial direction are integrally formed on the inner peripheral surface of the reinforcing ring (10), being arranged at equal intervals in the circumferential direction. ing. The position of each 1st engagement convex part (15) in the internal peripheral surface of a reinforcement ring (10) is a position between two fitting recessed parts (11) (11) adjacent to each other. And the surrounding wall part (2a) of the pipe (1) is engaging with the 1st engagement convex part (15) in the circumferential direction. The protruding height of the first engaging convex portion (15) is set in a range of 1 to 5 mm, for example. However, in the present invention, the protruding height of the first engaging convex portion (15) is not limited to the above range.

  The other structure of the pipe with attachment piece (P5) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P5), the peripheral wall portion (2a) of the pipe (1) is engaged with the first engaging convex portion (15) on the inner peripheral surface of the reinforcing ring (10) in the circumferential direction. The joint strength of the reinforcing ring (10) with respect to the circumferential load of the pipe (1) can be increased.

  In the present invention, the first engagement recess (14) (see FIG. 8) may be provided on the inner peripheral surface of the reinforcing ring (10) instead of the first engagement protrusion (15). In this case, the peripheral wall portion (2a) of the pipe (1) is engaged with the first engaging recess (14) in the circumferential direction. Moreover, the 1st engagement convex part (15) and the 1st engagement recessed part (14) may be provided in the internal peripheral surface of the reinforcement ring (10).

  FIG. 17 is a view for explaining a pipe with attachment piece (P6) according to the sixth embodiment of the present invention.

  In the pipe with attachment piece (P6), a second engagement recess (16) having a substantially arc-shaped cross section extending in the circumferential direction is provided in an axially intermediate portion of the inner peripheral surface of the reinforcing ring (10). The second engaging recess (16) is configured such that the base plate portion (21) of the attachment piece (20) and the peripheral wall portion (2a) of the pipe (1) are engaged in the axial direction, and the reinforcing ring (16). Is provided to extend over the entire circumference on the inner circumferential surface. The depth of the second engaging recess (16) is set in a range of 2 to 5 mm, for example. However, in the present invention, the depth of the second engagement recess (16) is not limited to the above range.

  The manufacturing method of this pipe with attachment piece (P6) is as follows. That is, the pipe (1) is inserted into the reinforcing ring (10), and the substrate portion (21) of the mounting piece (20) is disposed between the pipe (1) and the reinforcing ring (10). Next, in this state, the peripheral wall portion (2a) of the insertion portion of the pipe (1) into the reinforcing ring (1) and the peripheral wall portions (2b) (2b) of the portion in the vicinity of both axial sides of the insertion portion are expanded. Expand processing is performed as the processing scheduled portion (2). Thereby, the reinforcing ring (10) is joined to the pipe (1), and the substrate portion (21) of the mounting piece (20) is sandwiched between the pipe (1) and the reinforcing ring (10). Thus, the attachment piece (20) is joined to the pipe (1). Furthermore, by the expanding process, the base plate portion (21) of the mounting piece (20) and the peripheral wall portion (2a) of the pipe (1) bulge into the second engaging recess (16), whereby the mounting piece (20 ) And the peripheral wall portion (2a) of the pipe (1) are engaged with each other in the axial direction with the second engagement recess (16) in a superposed state.

  The other configuration of the pipe with attachment piece (P6) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P6), the base plate portion (21) of the attachment piece (20) is engaged with the second engagement recess (16) of the reinforcing ring (10) in the axial direction. The problem that the substrate portion (21) of 20) is pulled out from between the pipe (1) and the reinforcing ring (10) can be reliably prevented.

  Further, since the base plate portion (21) of the mounting piece (20) and the peripheral wall portion (2a) of the pipe (1) are engaged with the second engaging recess (16) in the axial direction, the shaft of the pipe (1) Both the joint strength of the mounting piece (20) and the joint strength of the reinforcing ring (10) against the load in the direction can be increased.

  FIG. 18 is a view for explaining a pipe with attachment piece (P7) according to the seventh embodiment of the present invention.

  This pipe with attachment piece (P7) is similar to the sixth pipe shown in FIG. 17 except that only the peripheral wall portion (2a) of the insertion portion into the reinforcement ring (10) of the pipe (1) is expanded. The configuration is the same as that of the embodiment (P6).

  FIG. 19 is a view for explaining a pipe with attachment piece (P8) according to the eighth embodiment of the present invention.

  In the pipe with attachment piece (P8), the attachment piece (20) has a support plate portion (23) for supporting the attachment piece (20) so that the attachment piece (20) does not fall to one side in the axial direction. The pipe (1) is integrally formed so as to protrude to one side in the axial direction. And the side edge part of this support plate part (23) is in contact with the outer peripheral surface of a pipe (1) in the state in which the attachment piece (20) was joined to the pipe (1). Therefore, the attachment piece (20) is supported by the support plate portion (23), and the attachment piece (20) is prevented from falling in the axial direction of the pipe (1).

  The other structure of the pipe with attachment piece (P8) is the same as that of the seventh embodiment (P7) shown in FIG.

  FIG. 20 is a view for explaining a pipe with attachment piece (P9) according to the ninth embodiment of the present invention.

  In this pipe with attachment piece (P9), a second engagement convex portion (17) having a substantially mountain-shaped cross section extending in the circumferential direction is provided at the axially intermediate portion of the inner peripheral surface of the reinforcing ring (10). . The second engaging convex part (17) is an element in which the base plate part (21) of the mounting piece (20) and the peripheral wall part (2a) of the pipe (1) are engaged in the axial direction. ) Extending over the entire circumference. The height of the second engaging convex portion (17) is set in a range of 2 to 5 mm, for example. However, in the present invention, the height of the second engagement convex portion (17) is not limited to the above range.

  In this pipe with attachment piece (P9), the base plate part (21) of the attachment piece (20) and the peripheral wall part (2a) of the pipe (1) are overlapped with each other, and the second engaging convex part (17) and the axial direction. Is engaged. In addition, in the same figure, the dashed-dotted line represents the surrounding wall part of the pipe (1) before an expansion process.

  In this pipe with attachment piece (P9), the base plate portion (21) of the attachment piece (20) is engaged with the second engagement projection (17) of the reinforcing ring (10) in the axial direction. The problem that the substrate portion (21) of (20) is pulled out from between the pipe (1) and the reinforcing ring (10) can be reliably prevented.

  Furthermore, since the base plate part (21) of the mounting piece (20) and the peripheral wall part (2a) of the pipe (1) are engaged with the second engaging convex part (17) in the axial direction, the pipe (1) Both the joint strength of the mounting piece (20) and the joint strength of the reinforcing ring (10) with respect to the axial load can be increased.

  FIG. 21 is a view for explaining a pipe with attachment piece (P10) according to the tenth embodiment of the present invention.

  In this pipe with attachment piece (P10), the cross-sectional shape of the outer peripheral surface of the pipe (1) is a polygonal shape. The cross-sectional shape of the inner peripheral surface of the reinforcing ring (10) is a polygonal shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe (1). Moreover, the cross-sectional shape of the outer peripheral surface of the reinforcing ring (10) is circular.

  Moreover, the fitting recessed part is not provided in the internal peripheral surface of the reinforcement ring (10). Of the eight mounting pieces (20), the length of the four mounting pieces (20) and the length of the remaining four mounting pieces (20) are different from each other.

  The other structure of the pipe with attachment piece (P1) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P1), the cross-sectional shape of the outer peripheral surface of the pipe (1) is a square shape, and the cross-sectional shape of the inner peripheral surface of the reinforcing ring (10) is the cross-sectional shape of the outer peripheral surface of the pipe (1). Since it has a corresponding quadrangular shape, it is possible to reliably prevent the reinforcing ring (10) from rotating in the circumferential direction of the pipe (1).

  FIG. 22 is a view for explaining a pipe with attachment piece (P11) according to an eleventh embodiment of the present invention.

  The pipe with attachment piece (P11) has the same configuration as that of the tenth embodiment (P10) shown in FIG. 21 except that the cross-sectional shape of the outer peripheral surface of the reinforcing ring (10) is substantially square. is there.

  FIG. 23 is a view for explaining a pipe with attachment piece (P12) according to a twelfth embodiment of the present invention.

  In this pipe with attachment piece (P12), the pipe (1) is made of an extruded material, and further, the partition wall (3) extending in the axial direction that vertically partitions the hollow portion of the pipe (1) is the pipe (1). Are integrally formed. Moreover, the cross-sectional shape of the outer peripheral surface of this pipe (1) is a substantially square shape. The cross-sectional shape of the inner peripheral surface of the reinforcing ring (10) is a polygonal shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe (1). Moreover, the cross-sectional shape of the outer peripheral surface of the reinforcing ring (10) is circular.

  In addition, six fitting recesses (11) are provided on the inner peripheral surface of the reinforcing ring (10). The depth d of the fitting recess (11) is set to be smaller than the thickness t of the substrate portion (21) of the mounting piece (20) (that is, d <t). And the board | substrate part (21) of the attachment piece (20) is fitted in each fitting recessed part (11) in the state which protruded inside the inner peripheral surface of the reinforcement ring (10).

  The other configuration of the pipe with attachment piece (P12) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P12), since the pipe (1) is reinforced by the partition wall portion (3), the rigidity of the pipe with attachment piece (P12) can be improved.

  In the present invention, the cross-sectional shape of the outer peripheral surface of the pipe (1) is not limited to a circular shape or a quadrangular shape, but may be other polygonal shapes such as a triangular shape, a pentagonal shape, and a hexagonal shape. It may be oval or oval.

  In the present invention, the cross-sectional shape of the outer peripheral surface of the reinforcing ring (10) is not limited to a circular shape or a quadrangular shape, and other polygonal shapes such as a triangular shape, a pentagonal shape, a hexagonal shape, etc. It may be oval or oval.

  FIG.24 and FIG.25 is a figure explaining the pipe (P13) with an attachment piece which concerns on 13th Embodiment of this invention.

  In this pipe with attachment piece (P13), as shown in FIG. 24, the attachment piece (20) has a substantially triangular shape in plan view, and the direction from the proximal end portion to the distal end portion of the attachment piece (20) ( In other words, the width of the mounting piece (20) is gradually narrowed in the projecting direction). Further, as shown in FIG. 25, a base plate portion (21) bent at a substantially right angle (right angle) to the mounting piece (20) is integrally formed at the base end portion of the mounting piece (20). ing. Furthermore, a third engaging convex portion (25) extending in the axial direction of the pipe (1) is integrated with the intermediate portion in the width direction of the contact surface (21b) of the base plate portion (21) with the pipe (1). Is formed. This 3rd engagement convex part (25) engages the peripheral wall part (2a) of a pipe (1) in the circumferential direction. The mounting piece (20) is manufactured by die casting. The height of the third engagement convex portion (25) is set in a range of 1 to 5 mm, for example. However, in the present invention, the height of the third engagement protrusion (25) is not limited to the above range.

  Moreover, as shown in FIG. 24, two fitting recessed parts (11) are provided in the internal peripheral surface of the reinforcement ring (10). The depth d of the fitting recess (11) is set to be the same as the thickness t of the substrate portion (21) of the mounting piece (20) (that is, d = t). And the board | substrate part (21) of the attachment piece (20) is fitted in each fitting recessed part (11). Accordingly, in this fitted state, the third engaging convex portion (25) of the substrate portion (21) of the mounting piece (20) protrudes inward from the inner peripheral surface of the reinforcing ring (10). And the surrounding wall part (2a) of a pipe (1) is expanded, and the surrounding wall part (2a) of a pipe (1) is engaging with the 3rd engagement convex part (25) in the circumferential direction. In addition, the bulging part is not provided in the part on the opposite side to the fitting recessed part (11) in the outer peripheral surface of a reinforcement ring (10).

  The other structure of the pipe with attachment piece (P13) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P13), the peripheral wall portion (2a) of the pipe (1) is engaged with the third engagement convex portion (25) of the substrate portion (21) of the attachment piece (20) in the circumferential direction. Therefore, the joining strength of the attachment piece (20) with respect to the circumferential load of the pipe (1) can be increased.

  In the present invention, the third engaging convex portion (25) may be one in which the peripheral wall portion (2a) of the pipe (1) is engaged in the axial direction. In this case, the third engaging convex portion (25) is formed in the width direction (that is, the circumferential direction of the pipe (1)) on the contact surface (21a) of the base plate portion (21) of the mounting piece (20) with the pipe (1). ). Thereby, the joint strength of the attachment piece (20) with respect to the axial load of the pipe (1) can be increased. In the present invention, the third engaging convex part (25) may be one in which the peripheral wall part (2a) of the pipe (1) is engaged in both the circumferential direction and the axial direction.

  FIG.26 and FIG.27 is a figure explaining the pipe (P14) with an attachment piece which concerns on 14th Embodiment of this invention.

  In this pipe with attachment piece (P1), as shown in FIG. 27, the attachment piece (20) has basically the same structure as the attachment piece of the pipe with attachment piece (P13) of the thirteenth embodiment. Instead of the third engaging convex portion (25), the two third engaging concave portions (26) are in contact with the pipe (1) of the base plate portion (21) of the mounting piece (20) (21b). Is provided. The third engaging recess (26) is formed by locally notching a predetermined portion of the substrate portion (21) of the mounting piece (20). The third engaging recess (26) extends in the axial direction of the pipe (1), and the peripheral wall (2a) of the pipe (1) engages in the circumferential direction. The mounting piece (20) is manufactured by press molding. The depth of the third engagement recess (26) from the contact surface (21b) is set in a range of 1 to 5 mm, for example. However, in the present invention, the depth of the third engagement recess (26) is not limited to the above range.

  Moreover, as shown in FIG. 26, two fitting recessed parts (11) are provided in the inner peripheral surface of the reinforcement ring (10). The depth d of the fitting recess (11) is set to be the same as the thickness t of the substrate portion (21) of the mounting piece (20) (that is, d = t). And the board | substrate part (21) of the attachment piece (20) is fitted in each fitting recessed part (11). Therefore, in this fitted state, the third engaging recess (26) of the substrate portion (21) of the mounting piece (20) is recessed with respect to the inner peripheral surface of the reinforcing ring (10). And the surrounding wall part (2a) of a pipe (1) is expanded, and the surrounding wall part (2a) of a pipe (1) is engaging with the 3rd engagement recessed part (26) in the circumferential direction. In addition, the bulging part is not provided in the part on the opposite side to the fitting recessed part (11) in the outer peripheral surface of a reinforcement ring (10).

  The other configuration of the pipe with attachment piece (P14) is the same as that of the first embodiment (P1).

  In this pipe with attachment piece (P14), the peripheral wall portion (2a) of the pipe (1) is engaged with the third engagement recess (26) of the substrate portion (21) of the attachment piece (20) in the circumferential direction. Therefore, the joint strength of the attachment piece (20) with respect to the circumferential load of the pipe (1) can be increased.

  In the present invention, the third engaging recess (26) may be one in which the peripheral wall portion (2a) of the pipe (1) is engaged in the axial direction. In this case, the third engaging recess (26) is formed in the width direction (that is, in the circumferential direction of the pipe (1)) on the contact surface (21a) with the pipe (1) of the substrate portion (21) of the mounting piece (20). It is provided to extend. Thereby, the joint strength of the attachment piece (20) with respect to the axial load of the pipe (1) can be increased. In the present invention, the third engaging recess (26) may be one in which the peripheral wall portion (2a) of the pipe (1) engages in both the circumferential direction and the axial direction.

  In the present invention, the mounting piece (20) is not limited to the one shown in the above embodiment, but may be the one shown in FIGS. 28 and 29, for example.

  The attachment piece (20) shown in FIG. 28 is formed with a reinforcement bead (24) as a reinforcement portion extending in the protruding direction.

  In the mounting piece (20), the rigidity of the mounting piece (20) is enhanced by the reinforcing bead (24).

  In the present invention, the attachment piece (20) may be provided with a reinforcing rib instead of the reinforcing bead (24) as the reinforcing portion, or the reinforcing bead (24) and the reinforcing rib are provided. Alternatively, other reinforcing portions may be provided.

  The attachment piece (20) shown in FIG. 29 is formed in a state twisted, for example, 90 ° in the protruding direction. Therefore, the mounting hole (20a) (eg, bolt insertion hole) at the tip of the mounting piece (20) is not in a direction parallel to the axis of the pipe (1) but in a direction perpendicular to the axis of the pipe (1). It has been.

  In this attachment piece (20), the orientation of the attachment piece (20), more specifically, the orientation of the attachment hole (20a) at the tip of the attachment piece (20) is set to other members to which the attachment piece (20) is attached. It can be changed correspondingly.

  Although several embodiments of the present invention have been described above, the present invention is not limited to those shown in the above embodiments, and various setting changes can be made.

  For example, the structure of the pipe with attachment pieces of the present invention may be a structure in which two or more of the structures of the pipes with attachment pieces (P1 to P14) of the first to fourteenth embodiments are combined.

  The pipe with attachment piece of the present invention is joined to the pipe (1) by mixing two or more kinds of attachment pieces (10) shown in FIGS. 6, 25, 27, 28 and 29, for example. May be.

  INDUSTRIAL APPLICABILITY The present invention can be used for, for example, a steering support beam of an automobile, a steering column holder, a muffler, other automobile parts, or a pipe with a mounting piece used as a pipe material as a product other than an automobile and a manufacturing method thereof.

It is a perspective view of the pipe with an attachment piece of 1st Embodiment of this invention. It is a cross-sectional view of the pipe with the attachment piece. FIG. 3 is an enlarged view of a Z portion in FIG. 2. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is the YY sectional view taken on the line in FIG. It is a perspective view of the attachment piece of the pipe with the attachment piece. It is a longitudinal cross-sectional view of the state in the middle of expanding the surrounding wall part of a pipe. It is a cross-sectional view at the time of changing the number of attachment pieces in the pipe with attachment pieces. It is a cross-sectional view at the time of changing the shape of the bottom face of the fitting recessed part of a reinforcement ring. It is a cross-sectional view of the pipe with attachment piece of the second embodiment of the present invention. It is an enlarged view of Z part in FIG. It is a cross-sectional view of the pipe with attachment piece of the third embodiment of the present invention. It is an enlarged view of the Z part in FIG. It is a cross-sectional view of the pipe with attachment piece of the fourth embodiment of the present invention. It is an enlarged view of the Z part in FIG. It is a cross-sectional view of the pipe with attachment piece of the fifth embodiment of the present invention. It is a longitudinal cross-sectional view of the pipe with an attachment piece of 6th Embodiment of this invention. It is a longitudinal cross-sectional view of the pipe with an attachment piece of 7th Embodiment of this invention. It is a longitudinal cross-sectional view of the pipe with an attachment piece of 8th Embodiment of this invention. It is a longitudinal cross-sectional view of the pipe with an attachment piece of 9th Embodiment of this invention. It is a longitudinal cross-sectional view of the pipe with an attachment piece of 10th Embodiment of this invention. It is a longitudinal cross-sectional view of the pipe with an attachment piece of 11th Embodiment of this invention. It is a longitudinal cross-sectional view of the pipe with attachment piece of 12th Embodiment of this invention. It is a cross-sectional view of a pipe with attachment pieces of a thirteenth embodiment of the present invention. It is a perspective view of the attachment piece of the pipe with the attachment piece. It is a cross-sectional view of a pipe with a mounting piece according to a fourteenth embodiment of the present invention. It is a perspective view of the attachment piece of the pipe with the attachment piece. It is a partially cutaway perspective view showing a modification of the mounting piece. It is a perspective view which shows another modification of an attachment piece.

Explanation of symbols

P1 to P14 ... Pipe with mounting piece 1 ... Pipe (pipe body)
2 ... expanded processing planned portions 2a, 2b ... peripheral wall portion 3 ... partition wall portion 10 ... reinforcing ring 11 ... engagement recess 12 ... bulging portion 13 ... depression portion 14 ... first engagement recess 15 ... first engagement projection 16 ... 2nd engagement recessed part 17 ... 2nd engagement convex part 20 ... Mounting piece 20a ... Mounting hole 21 ... Board | substrate part 21a ... Overhang | projection part 21b ... Contact surface 22 ... Locking claw 23 ... Support plate part 24 ... Reinforcement bead (Reinforcement part)
25 ... 3rd engagement convex part 26 ... 3rd engagement recessed part

Claims (49)

A pipe with a mounting piece joined to the pipe in a state where the mounting piece attached to another member protrudes outside the pipe,
A base plate portion bent with respect to the mounting piece is integrally provided at the base end of the mounting piece,
While the pipe is inserted into the reinforcing ring, the reinforcing ring is joined to the pipe by expanding at least one peripheral wall portion of the insertion portion of the pipe into the reinforcing ring and the vicinity thereof,
A pipe with an attachment piece, wherein the attachment piece is joined to the pipe by sandwiching the substrate portion of the attachment piece between the pipe and the reinforcing ring. On the inner peripheral surface of the reinforcing ring, a fitting recess into which the board portion of the mounting piece is fitted is provided,
The pipe with attachment piece according to claim 1, wherein the substrate portion of the attachment piece is sandwiched between the pipe and the reinforcing ring in a state where the substrate portion is fitted in the fitting recess. The depth of the fitting recess is set smaller than the thickness of the board part of the mounting piece,
The mounting plate is fitted in the fitting recess so that the board portion of the mounting plate protrudes inward from the inner peripheral surface of the reinforcing ring.
The pipe with attachment piece according to claim 2, wherein the peripheral wall portion of the pipe is engaged with the protruding portion of the base plate portion of the attachment piece in the circumferential direction. The depth of the fitting recess is set larger than the thickness of the board part of the mounting piece,
The mounting plate is fitted in the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring,
The pipe with a mounting piece according to claim 2, wherein the peripheral wall portion of the pipe is engaged with a recess portion on the inner peripheral surface of the reinforcing ring in the circumferential direction.   The pipe with a mounting piece according to any one of claims 2 to 4, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion.   The pipe with a mounting piece according to any one of claims 1 to 5, wherein a peripheral wall portion of the pipe is engaged with a first engaging recess provided on an inner peripheral surface of the reinforcing ring in a circumferential direction.   The pipe with attachment piece according to claim 6, wherein a bulging portion bulging radially outward is formed at a portion of the outer peripheral surface of the reinforcing ring opposite to the first engaging recess. On the inner peripheral surface of the reinforcing ring, a plurality of fitting recesses to which the board portion of the mounting piece is fitted are provided side by side in the circumferential direction.
The base plate portion of the mounting piece is sandwiched between the pipe and the reinforcing ring in a state of being fitted into the other fitting recesses, leaving at least one fitting recess among the plurality of fitting recesses. And
The pipe with a mounting piece according to claim 1, wherein the peripheral wall portion of the pipe is engaged with the fitting concave portion in the circumferential direction. The depth of the fitting recess is set smaller than the thickness of the board part of the mounting piece,
The mounting plate is fitted in the fitting recess so that the board portion of the mounting plate protrudes inward from the inner peripheral surface of the reinforcing ring.
The pipe with a mounting piece according to claim 8, wherein the peripheral wall portion of the pipe is engaged with a protruding portion of the base plate portion of the mounting piece in the circumferential direction. The depth of the fitting recess is set larger than the thickness of the board part of the mounting piece,
The mounting plate is fitted in the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring,
The pipe with a mounting piece according to claim 8, wherein the peripheral wall portion of the pipe is engaged with a recess portion on the inner peripheral surface of the reinforcing ring in the circumferential direction.   The pipe with a mounting piece according to any one of claims 8 to 10, wherein a bulging portion bulging radially outward is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion.   The pipe with a mounting piece according to any one of claims 1 to 11, wherein a peripheral wall portion of the pipe is engaged with a first engagement convex portion provided on an inner peripheral surface of the reinforcing ring in a circumferential direction.   The pipe with an attachment piece according to any one of claims 1 to 12, wherein a base plate portion of the attachment piece is engaged in an axial direction with a second engagement recess provided on an inner peripheral surface of the reinforcing ring.   The pipe with attachment piece according to claim 13, wherein the base plate portion of the attachment piece and the peripheral wall portion of the pipe are engaged with the second engagement recess in the axial direction.   The pipe with an attachment piece according to any one of claims 1 to 14, wherein a base plate portion of the attachment piece is engaged in an axial direction with a second engagement convex portion provided on an inner peripheral surface of the reinforcing ring.   The pipe with attachment piece according to claim 15, wherein the base plate portion of the attachment piece and the peripheral wall portion of the pipe are engaged with the second engagement convex portion in the axial direction. A locking claw is provided at the tip of the board part of the mounting piece,
The pipe with a mounting piece according to any one of claims 1 to 16, wherein the locking claw is locked to a side edge of the reinforcing ring.   The pipe with a mounting piece according to any one of claims 1 to 17, wherein a reinforcing portion for increasing the rigidity of the mounting piece is formed on the mounting piece.   The pipe with an attachment piece according to any one of claims 1 to 18, wherein the attachment piece is provided with a support plate portion that supports the attachment piece in a fall-preventing state.   The pipe with an attachment piece according to any one of claims 1 to 19, wherein the attachment piece is formed in a twisted state in the protruding direction.   21. The pipe with attachment piece according to any one of claims 1 to 20, wherein a peripheral wall portion of the pipe is engaged with a third engagement protrusion provided on a surface of the attachment piece in contact with the pipe of the substrate portion.   The pipe with an attachment piece according to any one of claims 1 to 21, wherein the peripheral wall portion of the pipe is engaged with a third engagement recess provided on a contact surface of the attachment piece with the pipe of the substrate portion. The cross-sectional shape of the outer peripheral surface of the pipe is a polygonal shape,
The pipe with attachment piece according to any one of claims 1 to 22, wherein the cross-sectional shape of the inner peripheral surface of the reinforcing ring is a polygonal shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe.   The pipe with attachment piece according to any one of claims 1 to 23, wherein a partition wall portion extending in the axial direction for vertically partitioning a hollow portion of the pipe is provided on the pipe. A method of manufacturing a pipe with a mounting piece that joins a pipe with a mounting piece attached to another member protruding to the outside of the pipe,
A base plate portion bent with respect to the mounting piece is integrally provided at the base end of the mounting piece,
With the pipe inserted into the reinforcement ring and the base plate portion of the mounting piece disposed between the pipe and the reinforcement ring, at least one peripheral wall portion of the pipe insertion portion into the reinforcement ring and the vicinity thereof is expanded. A method of manufacturing a pipe with an attachment piece, wherein the attachment piece is joined to the pipe by processing. On the inner peripheral surface of the reinforcing ring, a fitting recess into which the board portion of the mounting piece is fitted is provided,
26. The production of a pipe with a mounting piece according to claim 25, wherein the substrate portion of the mounting piece is disposed between the pipe and the reinforcing ring in a state of being fitted in the fitting recess, and the peripheral wall portion of the pipe is expanded in this state. Method. The depth of the fitting recess is set smaller than the thickness of the board part of the mounting piece,
27. The method for manufacturing a pipe with a mounting piece according to claim 26, wherein the mounting plate is fitted into the fitting recess in a state where the substrate portion of the mounting plate protrudes inward from the inner peripheral surface of the reinforcing ring. The depth of the fitting recess is set larger than the thickness of the board part of the mounting piece,
27. The method for manufacturing a pipe with an attachment piece according to claim 26, wherein the substrate portion of the attachment plate is fitted into the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring.   The production of the pipe with attachment piece according to any one of claims 26 to 28, wherein a bulging portion bulging radially outward is formed at a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting concave portion. Method.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-29 provided with the 1st engagement recessed part with which the surrounding wall part of a pipe engages with the internal peripheral surface of a reinforcement ring in the circumferential direction.   31. The method for manufacturing a pipe with attachment piece according to claim 30, wherein a bulging portion bulging outward in the radial direction is formed on a portion of the outer peripheral surface of the reinforcing ring opposite to the first engaging recess. On the inner peripheral surface of the reinforcing ring, a plurality of fitting recesses to which the board portion of the mounting piece is fitted are provided side by side in the circumferential direction.
26. The board portion of the mounting piece is disposed between the pipe and the reinforcing ring in a state of being fitted in the other fitting recesses, leaving at least one fitting recess among the plurality of fitting recesses. The manufacturing method of the pipe with a mounting piece of description. The depth of the fitting recess is set smaller than the thickness of the board part of the mounting piece,
33. The method of manufacturing a pipe with attachment piece according to claim 32, wherein the substrate portion of the attachment plate is fitted into the fitting recess in a state of protruding from the inner peripheral surface of the reinforcement ring. The depth of the fitting recess is set larger than the thickness of the board part of the mounting piece,
The manufacturing method of a pipe with an attachment piece according to claim 32, wherein the substrate portion of the attachment plate is fitted into the fitting recess in a state where the substrate portion is recessed with respect to the inner peripheral surface of the reinforcing ring.   35. Manufacture of pipe with attachment piece according to any one of claims 32 to 34, wherein a bulging portion bulging radially outward is formed in a portion of the outer peripheral surface of the reinforcing ring opposite to the fitting recess. Method.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-35 provided with the 1st engagement convex part with which the surrounding wall part of a pipe engages with the internal peripheral surface of a reinforcement ring in the circumferential direction.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-36 in which the 2nd engagement recessed part with which the board | substrate part of an attachment piece engages with an axial direction is provided in the internal peripheral surface of a reinforcement ring.   38. The method of manufacturing a pipe with attachment piece according to claim 37, wherein the second engagement recess is one in which the attachment piece, the substrate portion, and the peripheral wall portion of the pipe are engaged in the axial direction.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-38 in which the 2nd engagement convex part with which the board | substrate part of an attachment piece engages with an axial direction is provided in the internal peripheral surface of the reinforcement ring.   40. The method of manufacturing a pipe with attachment piece according to claim 39, wherein the second engagement convex part is one in which the base plate portion of the attachment piece and the peripheral wall portion of the pipe are engaged in the axial direction.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-40 in which the latching claw which latches to the side edge part of a reinforcement ring is provided in the front-end | tip part of the board | substrate part of an attachment piece.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-41 in which the reinforcement part which raises the rigidity of this attachment piece is formed in the attachment piece.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-42 in which the support plate part which supports this attachment piece in the fall prevention state is provided in the attachment piece.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-43 currently formed in the state twisted with respect to the protrusion direction.   45. The manufacturing of a pipe with an attachment piece according to any one of claims 25 to 44, wherein a third engagement convex portion with which a peripheral wall portion of the pipe is engaged is provided on a contact surface of the attachment portion with the pipe of the substrate portion. Method.   The manufacturing method of a pipe with a mounting piece according to any one of claims 25 to 45, wherein a third engagement recess for engaging with a peripheral wall portion of the pipe is provided on a contact surface of the mounting portion with the pipe of the substrate portion. . The cross-sectional shape of the outer peripheral surface of the pipe is a polygonal shape,
47. The method for manufacturing a pipe with an attachment piece according to any one of claims 25 to 46, wherein the cross-sectional shape of the inner peripheral surface of the reinforcing ring is a polygonal shape corresponding to the cross-sectional shape of the outer peripheral surface of the pipe.   The manufacturing method of the pipe with an attachment piece in any one of Claims 25-47 in which the partition wall part extended in the axial direction which partitions off the hollow part of a pipe vertically is provided in the pipe. The expanding process is performed by an expanding process using hydraulic pressure as a pressure medium, an expanding process using rubber as a pressure medium, an expanding process using a molding roll, or an expanding process using a mold. Manufacturing method of pipe with mounting piece.

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