Mounting structure for a mounted part and a flange head mounting structure for an end of a hose pipe

Abstract

To achieve a long life by suppressing breakage and deformation by reducing deflection of a mounting member, and improving durability of the mounting member.SOLUTION: In a mounting structure of a flange head of an end portion of hose piping for mounting an annular plate portion 24 in a manner of being pressure-contact with a mounting surface 1202 by engaging a bolt 44 inserted to a bolt insertion hole 36, with a female screw 1204 of the mounting surface 1202, an axial center T of the bolt insertion hole 36 and the female screw 1204 is inclined to a normal line L of the mounting surface 1202 so that at least a part of a head portion 4402 of the bolt 44 inserted to the bolt insertion hole 36 and engaged with the female screw 1204 is positioned at a projecting portion 3404 side with respect to a boundary B of a main body portion 3402 and the projecting portion 3404.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a mounting structure for a mounted portion and a mounting structure for a flange head at the end of a hose pipe. [Background technology]

[0002] For example, in construction machinery, a control valve connected to a hydraulic pump is provided, and hydraulic pressure is supplied from this control valve via hose piping to a hydraulic motor for traveling, a hydraulic motor for turning, and various hydraulic actuators for work (Patent Document 1, Patent Document 2). The end of the hose pipe is provided with a flange head through which the first flow passage passes and to which the end of the hose is joined. A ring plate portion is provided at the tip of the flange head, and a first opening of the first flow passage is located in the ring plate portion. The control valve also has a mounting surface for mounting an end of a hose pipe, and second openings of a plurality of second flow paths connected to the internal flow paths are located on the mounting surface, and a female thread is formed around the second openings. A clamp is used to attach the end of the hose pipe to the mounting surface. The clamp fitting is composed of a pair of clamps, each with a bolt insertion hole formed therethrough. The pair of clamps are positioned by abutting them on either side of the flange head, and the bolts inserted into the bolt insertion holes are screwed into the female threads of the mounting surface, thereby pressing the flange head against the mounting surface using the tightening force of the bolts, thereby connecting the first flow path and the second flow path. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-215006 A [Patent Document 2] JP 2002-188175 A Summary of the Invention [Problem to be solved by the invention]

[0004] Each of the pair of clamps that make up the conventional clamp fittings described above is configured to have a main body portion with a bolt insertion hole and a protrusion portion that protrudes from the main body portion, and when the end of the hose piping is attached to a mounting surface, the main body portion is abutted against the outer peripheral surface of the ring plate portion, the protrusion portion is abutted against the upper surface of the ring plate portion, and a bolt that is inserted into the bolt insertion hole of the main body portion and screwed into the female thread is attached perpendicular to the mounting surface. When the bolt inserted into the bolt insertion hole of the main body is tightened, the head of the bolt presses against the main body of the clamp, causing the protrusion to press the ring plate portion perpendicularly against the mounting surface. As a result, the protrusion becomes like a cantilever, and stress is concentrated at the base of the protrusion, where it meets the main body, making the protrusion prone to damage or deformation, which is disadvantageous in terms of increasing the durability of the clamp. The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide an attachment structure for an attached part that alleviates stress concentration at the boundary between the main body and the protrusion, suppresses damage and deformation that occurs in the protrusion, and improves the durability and long life of the attachment member by positioning at least a part of the head of the bolt on the protrusion side of the boundary between the main body and the protrusion, thereby reducing stress concentration at the boundary between the main body and the protrusion, and suppresses damage and deformation that occurs in the protrusion, thereby improving the durability of the attachment member and extending its lifespan. Another object of the present invention is to provide a mounting structure for a flange head at the end of a hose piping which alleviates stress concentration at the boundary between the main body and the protrusion by positioning at least a portion of the bolt head on the protrusion side of the boundary between the main body and the protrusion, suppresses damage and deformation that occurs to the protrusion, improves the durability of a pair of clamps and extends their lifespan. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, one embodiment of the present invention provides a mounting member including a main body portion having a bolt insertion hole formed therethrough and a first abutment surface capable of abutting against an outer peripheral surface of a mounted part, and a protrusion portion protruding from a portion of the main body portion above the first abutment surface and having a second abutment surface capable of abutting against an upper surface of the mounted part, wherein, with the first abutment surface abutting against the outer peripheral surface of the mounted part and the second abutment surface abutting against the upper surface of the mounted part, a bolt inserted into the bolt insertion hole is screwed into a female thread of the mounting surface to press the mounted part against the mounting surface, and the axis of the bolt insertion hole and the female thread are inclined with respect to the normal to the mounting surface so that at least a portion of the head of the bolt inserted into the bolt insertion hole and screwed into the female thread is located on the protruding part side of the boundary between the main body portion and the protruding part. In addition, one embodiment of the present invention is characterized in that the axes of the bolt insertion hole and the female thread are inclined so that the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced at its lower part in a direction away from the attached portion more than its upper part. In addition, one embodiment of the present invention is characterized in that a seat surface is provided on the upper surface of the mounting member around the bolt insertion hole, extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the head of the bolt to abut against it. Moreover, one embodiment of the present invention includes a pair of clamps arranged on both sides of a ring plate that constitutes a flange head at an end of a hose pipe, each of which has a bolt insertion hole formed therethrough, and each of the clamps includes a main body portion that extends along an outer circumferential surface of the ring plate portion, the bolt insertion holes being formed at both ends in the extending direction, and which has a first abutment surface that can abut against the outer circumferential surface of the ring plate portion, and a protruding portion that protrudes from a portion of the main body portion above the first abutment surface and which can abut against an upper surface of the ring plate portion, and the first abutment surface abuts against the outer circumferential surface of the ring plate portion. a mounting structure for a flange head at the end of a hose pipe, in which the ring plate portion is pressed against the mounting surface by screwing a bolt inserted through the bolt insertion hole into the female thread of the mounting surface with the second abutment surface abutting the upper surface of the ring plate portion, wherein the axis of the bolt insertion hole and the female thread are inclined with respect to the normal to the mounting surface so that at least a part of the head of the bolt inserted through the bolt insertion hole and screwed into the female thread is located on the protrusion side of the boundary between the main body portion and the protrusion. In addition, one embodiment of the present invention is characterized in that the flange head has a first small diameter portion protruding from the ring plate portion and having a diameter smaller than that of the ring plate portion, and the protruding portion has a third abutment surface that can abut against an outer peripheral surface of the first small diameter portion. In addition, one embodiment of the present invention is characterized in that the axes of the bolt insertion hole and the female thread are inclined so that the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced at its lower part away from the flange head more than its upper part. In addition, one embodiment of the present invention is characterized in that a seat surface is provided on the upper surface of the clamp around the bolt insertion hole, extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the head of the bolt to abut against it. Effect of the Invention

[0006] According to one embodiment of the present invention, in an attachment structure in which a bolt inserted into a bolt insertion hole is screwed into the female thread of the attachment surface to press the attached portion against the attachment surface, at least a portion of the head of the bolt is located on the protruding portion side of the boundary between the main body and the protruding portion, so that the shear force generated at the boundary can be received by the head of the bolt which is located on the protruding portion side of the boundary, thereby alleviating stress concentration at the boundary between the main body and the protruding portion, suppressing damage and deformation that occurs in the protruding portion, and being advantageous in improving the durability of the attachment member and extending its lifespan. Furthermore, if the axes of the bolt insertion hole and the female thread are inclined so that the lower part of the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced in a direction away from the attached part more than the upper part, this is advantageous in ensuring that part of the bolt head is positioned closer to the protrusion than the boundary between the main body and the protrusion, thereby alleviating stress concentration at the boundary between the main body and the protrusion and suppressing breakage and deformation that occurs in the protrusion, improving the durability of the mounting member and extending its lifespan. In addition, if the upper surface of the mounting member is provided with a seat surface that extends on a plane perpendicular to the axis of the bolt insertion hole at a location around the bolt insertion hole and allows the underside of the bolt head to abut, this is advantageous for reliably mounting the bolt in the direction in which the bolt insertion hole and female thread are provided, and is advantageous for reliably abutting the first abutment surface on the outer peripheral surface of the mounted part and the second abutment surface on the upper surface of the mounted part. Furthermore, according to one embodiment of the present invention, in the mounting structure for the flange head at the end of the hose pipe, in which a bolt inserted into a bolt insertion hole is screwed into the female thread of the mounting surface to press the ring plate portion against the mounting surface, at least a portion of the head of the bolt is located on the protruding portion side of the boundary between the main body portion and the protruding portion, so that the shear force generated at the boundary can be received by the head of the bolt which is located on the protruding portion side of the boundary, thereby alleviating stress concentration at the boundary between the main body portion and the protruding portion, suppressing damage and deformation that occurs in the protruding portion, and being advantageous in improving the durability of the pair of clamps A and achieving a longer lifespan. Furthermore, if the flange head is configured to protrude from the ring plate portion and to have a first small diameter portion having a smaller diameter than the ring plate portion, and the protruding portion has a third abutment surface that can abut against the outer peripheral surface of the first small diameter portion, this is advantageous in positioning a pair of clamps arranged on both sides of the ring plate portion. Furthermore, if the axes of the bolt insertion hole and the female thread are inclined so that the lower part of the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced in a direction away from the flange head more than the upper part, this is advantageous in reliably positioning part of the bolt head on the protrusion side rather than the boundary between the main body and the protrusion, reducing stress concentration at the boundary between the main body and the protrusion, suppressing damage and deformation that occurs in the protrusion, and improving the durability of the pair of clamps and extending their lifespan. In addition, if the upper surface of the clamp is provided with a seat surface that extends on a plane perpendicular to the axis of the bolt insertion hole at a location around the bolt insertion hole and that allows the underside of the bolt head to abut, this is advantageous for securely attaching the bolt in the direction in which the bolt insertion hole and female thread are provided, and is advantageous for securely abutting the first abutment surface against the outer peripheral surface of the ring plate portion, the second abutment surface against the upper surface of the ring plate portion, and the third abutment surface against the outer peripheral surface of the first small diameter portion. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view of an end of a hose pipe attached to a mounting surface of a control valve by a clamp fitting. FIG. [Diagram 2] 2 is a cross-sectional view taken along line A-A in FIG. 1, which connects the axial center of the flange head and the axial center of the two bolts. [Diagram 3] FIG. 2 is a perspective view illustrating the state in which a flange head is attached to the mounting surface of a control valve via a bolt, a clamp fitting, and an O-ring. [Figure 4] FIG. 2 is a side view illustrating the state in which a flange head is attached to the mounting surface of a control valve via a bolt, a clamp fitting, and an O-ring. [Diagram 5]In the explanatory diagram of the clamp, (A) is an oblique view, (B) is a plan view, (C) is a rear view, (D) is a side view, (E) is a bottom view, and (F) is a cross-sectional view taken along line F-F of (B). [Figure 6] 13 is a diagram illustrating the distance between the position where the head of the bolt presses the clamp and the position where the protrusion presses the ring plate portion. FIG. [Figure 7] FIG. 1 is an explanatory diagram of a clamp; (A) is a plan view, (B) is a bottom view, and (C) is a cross-sectional view taken along line CC of (A). [Figure 8] FIG. 2 is a plan view showing the clamp attached to the attachment surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (First embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In Figures 1 and 2, reference numeral 10 denotes a control valve that is mounted on a construction machine and connected to a hydraulic pump, and reference numeral 12 denotes one of a plurality of mounting seats provided on the control valve 10. Furthermore, reference numeral 16 denotes a flange head that is connected to the end of the hose 14, and the flange head 16 constitutes the end of the hose pipe. The flange head 16 is attached to the mounting surface 1202 of the mounting base 12 by the clamp metal fitting 32 of this embodiment.

[0009] First, the flange head 16 serving as the mounting portion will be described. As shown in FIG. 2, a first flow passage 18 that communicates with the inside of the hose 14 is formed penetrating the flange head 16 . As shown in FIG. 4, a portion of the outer periphery of the flange head 16 in the longitudinal direction is formed as a hose coupling portion 22 having a nipple portion (not shown) that is fitted with the end of the hose 14, and a socket 20 that is provided radially outward from the nipple portion and is crimped radially inward to fix the end of the hose 14 to the nipple portion, and a ring plate portion 24 is formed at the tip of the remaining longitudinal portion of the flange head 16. The flange head 16 also has a first small diameter portion 26 protruding from the ring plate portion 24 and having a smaller diameter than the ring plate portion 24, and further has a second small diameter portion 28 protruding from the first small diameter portion 26 and having a smaller diameter than the first small diameter portion 26. The hose coupling portion 22 and the annular plate portion 24 are connected via a first small diameter portion 26 and a second small diameter portion 28 . The outer periphery of both the ring plate portion 24 and the first small diameter portion 26 is formed into a circular outline, but the outer periphery of the ring plate portion 24 and the first small diameter portion 26 may be formed into an outline of a polygon or the like and is not limited to a circular outline.

[0010] The annular plate portion 24 constitutes the flange head 16 at the end of the hose 14 and is placed on the mounting surface 1202 , and has a lower surface 2402 , an upper surface 2404 , and an outer circumferential surface 2406 . The lower surface 2402 constitutes one surface of the annular plate portion 24 in the thickness direction, and is formed as a flat surface. At the center of the lower surface 2402, the first opening 18A of the first flow passage 18 (see FIG. 2) is located. As shown in FIG. 2, the lower surface 2402 is provided with a recessed groove 2408 that extends in an annular shape centered on the first opening 18A, and an O-ring 2410 is attached to the recessed groove 2408. The upper surface 2404 constitutes the other surface in the thickness direction of the annular plate portion 24 and is formed of an annular flat surface. The outer circumferential surface 2406 is formed by a cylindrical surface that connects the outer periphery of the lower surface 2402 and the outer periphery of the upper surface 2404 .

[0011] As shown in FIG. 3, the control valve 10 is provided with a plurality of second flow paths 30, the mounting surface 1202 of the mounting seat 12 is formed as a flat surface, and the second openings 30A of the second flow paths 30 are located on the mounting surface 1202. Four female threads 1204 are provided on the mounting surface 1202 around the second opening 30A, and as shown in FIG. 2, each of the four female threads 1204 is inclined in a predetermined direction.

[0012] 1 and 3, the clamp fitting 32 serving as the mounting member is disposed on both sides of the annular plate portion 24 constituting the flange head 16, and is composed of a pair of clamps 34A, each having a bolt insertion hole 36 formed therethrough. The pair of clamps 34A are symmetrically disposed with respect to the clamps 34A of the same shape. As shown in FIGS. 3 and 5, each of the pair of clamps 34A includes a main body portion 3402 and a protruding portion 3404 extending along the outer circumferential surface 2406 of the ring plate portion 24. The main body portion 3402 has bolt insertion holes 36 formed at both ends in the extending direction thereof, and has a first contact surface 3412 that can contact the outer circumferential surface 2406 of the ring plate portion 24 . The protrusion 3404 protrudes from the main body portion 3402 above the first abutment surface 2312, and has a second abutment surface 3414 that can abut against the upper surface 2404 of the ring plate portion 24, and a third abutment surface 3416 that can abut against the outer peripheral surface 2602 of the first small diameter portion 26.

[0013] As shown in FIG. 5, the clamp 34A extends in a semicircular arc shape having a thickness in a direction perpendicular to its extension direction, and the lower surface 3418, which is one surface in the thickness direction, is formed as a single flat surface. As shown in FIG. 5(F), a first abutment surface 3412 extends vertically upward from the inner end of the lower surface 3418, a second abutment surface 3414 extends horizontally inward from the upper end of the first abutment surface 3412, and a third abutment surface 3416 extends vertically upward from the end of the second abutment surface 3414.

[0014] Moreover, an upper surface 3420 which is the other surface in the thickness direction of the clamp 34A has a central portion in its extending direction formed as a single flat surface, and seat surfaces 3422 are provided on both ends in the extending direction. The seat surface 3422 is provided on the upper surface 3420 of the clamp 34A at a location around the bolt insertion hole 36, extends on a plane perpendicular to the axis of the bolt insertion hole 36, and is capable of contacting the underside of the head of the bolt 44.

[0015] As shown in Figures 2, 4, and 6, the bolt insertion hole 36 provided in the main body portion 3402 and the axis T of the female thread 1204 provided in the mounting surface 1202 are inclined with respect to the normal L of the mounting surface 1202 so that at least a portion of the head 4402 of the bolt 44 inserted into the bolt insertion hole 36 and screwed into the female thread 1204 is located on the protruding portion 3404 side of the boundary B between the main body portion 3402 and the protruding portion 3404. In detail, when viewed from a direction perpendicular to an imaginary plane that is perpendicular to the mounting surface 1202 and passes through the axis T of the bolt insertion hole 36 and the female thread 1204, the axis T of the bolt insertion hole 36 and the female thread 1204 and the normal L at any point on the mounting surface 1202 are inclined at an angle θ. In this embodiment, as shown in FIG. 6, at the same time, the bolt 44 inserted into the bolt insertion hole 36 and screwed into the female thread 1204 is inclined so that its lower portion 44B is displaced in a direction away from the flange head 16 more than its upper portion 44A. In this embodiment, the extension line of the axis T of the bolt insertion hole 36 and the female thread 1204 intersects with the axis of the flange head 16, and the axis T of the bolt insertion hole 36 and the female thread 1204 is formed at an incline so as to approach the axis T of the flange head 16 as it extends upward. Therefore, when the bolt 44 is attached, the lower part 44B is positioned at an incline so as to move away from the axis of the flange head 16. 2, 4 and 6, the angle θ at which the axis T of the bolt insertion hole 36 and the female thread 1204 is inclined relative to the normal L of the mounting surface 1202 passing through the center of the opening of the female thread 1204 is set to be greater than 0 degrees and equal to or less than 17.9 degrees (0<θ≦17.9°). Here, the dimensions of the clamp 34A are determined by the SAE standard, and if the angle θ at which the axis T of the bolt insertion hole 36 and the female thread 1204 is inclined relative to the normal L of the mounting surface 1202 is made greater than 17.9 degrees, the bolt 44 will protrude from the outer circumferential surface of the main body 3402 of the clamp 34A, so in this embodiment, it is set to be equal to or less than 17.9 degrees. The seat surface 3422 extends on a plane perpendicular to the axis of the bolt insertion hole 36, and is therefore inclined at an angle θ with respect to the lower surface 3418 and the upper surface 3420 of the clamp 34A.

[0016] As shown in Figures 2, 3, and 4, when attaching the flange head 16 to the control valve 10, the lower surface 2402 of the ring plate portion 24 of the flange head 16 is aligned with the mounting surface 1202 of the mounting seat 12 so that the first opening 18A of the first flow path 18 and the second opening 30A of the second flow path 30 face each other, and a pair of clamps 34A are positioned along the ring plate portion 24. Then, as shown in FIG. 2 , the first abutment surface 3412 of the main body portion 3402 abuts against the outer peripheral surface 2406 of the ring plate portion 24, the second abutment surface 3414 of the protrusion portion 3404 abuts against the upper surface 2404 of the ring plate portion 24, and the third abutment surface 3416 of the protrusion portion 3404 abuts against the outer peripheral surface 2602 of the first small diameter portion 26. In this state, the bolt 44 inserted into the bolt insertion hole 36 of the main body portion 3402 is threaded into the female thread 1204 of the mounting surface 1202 and fastened, thereby pressing the ring plate portion 24 of the flange head 16 against the mounting surface 1202.

[0017] In this way, by tightening the bolt 44, the second abutment surface 3414 presses the upper surface 2404 of the ring plate portion 24, thereby pressing the lower surface 2402 of the ring plate portion 24 against the mounting surface 1202 of the mounting seat 12, and the lower surface 2402 of the ring plate portion 24 and the mounting surface 1202 are liquid-tightly joined via the O-ring 2410. At the same time, the first abutment surface 3412 presses against the outer peripheral surface 2406 of the ring plate portion 24 from both sides of the ring plate portion 24, and the third abutment surface 3416 presses against the outer peripheral surface 2602 of the first small diameter portion 26, so that the pair of clamps 34A are attached to the mounting surface 1202 in a positioned state. In addition, in order to reliably press the upper surface 2404 of the ring plate portion 24 by the second abutment surface 3414, a gap S is secured between the lower surface 3418 of the clamp 34A and the mounting surface 1202 when the second abutment surface 3414 is in contact with the upper surface 2404 of the ring plate portion 24.

[0018] According to this embodiment, as shown in FIG. 6, a portion of head 4402 of bolt 44 is located on the protruding portion 3404 side of boundary B between main body portion 3402 and protruding portion 3404. Therefore, the shear force generated at boundary B can be received at the portion of head 4402 of bolt 44 located on the protruding portion 3404 side of boundary B. This alleviates stress concentration at boundary B between main body portion 3402 and protruding portion 3404, suppresses damage and deformation generated at protruding portion 3404, and is advantageous in improving the durability of the pair of clamps 34A and achieving a longer lifespan.

[0019] In addition, since the protrusion 3404 is configured to have a third abutment surface 3416 that can abut against the outer peripheral surface 2602 of the first small diameter portion 26, this is advantageous in positioning the pair of clamps 34A arranged on both sides of the ring plate portion 24. In addition, the axis T of the bolt insertion hole 36 and the female thread 1204 is inclined with respect to the normal L of the mounting surface 1202 so that the bolt 44, which is inserted into the bolt insertion hole 36 and screwed into the female thread 1204, has its lower part 44B displaced in a direction away from the flange head 16 more than the upper part 44A. This is advantageous in reliably positioning a part of the head 4402 of the bolt 44 on the protruding part 3404 side rather than the boundary B between the main body part 3402 and the protruding part 3404, thereby alleviating stress concentration at the boundary B between the main body part 3402 and the protruding part 3404 and suppressing breakage and deformation that occurs in the protruding part 3404, and is advantageous in improving the durability of the pair of clamps 34A and achieving a longer life. As described above, the angle θ at which the bolt insertion hole 36 and the axis T of the female thread 1204 are inclined relative to the normal L of the mounting surface 1202 passing through the center of the opening of the female thread 1204 is set to be greater than 0 degrees and not greater than 17.9 degrees. However, the larger the angle θ is within that range, the more likely it is that a portion of the head 4402 of the bolt 44 will be positioned on the protruding portion 3404 side of the boundary B, which is more advantageous in suppressing breakage and deformation of the protruding portion 3404 and improving the durability of the pair of clamps 34A and achieving a longer lifespan. In addition, a seat 3422 extending on a plane perpendicular to the axis of the bolt insertion hole 36 and allowing the underside of the head of the bolt 44 to abut is provided on the upper surface 3420 of the clamp 34A around the bolt insertion hole 36. This is advantageous for securely attaching the bolt 44 in the direction in which the bolt insertion hole 36 and the female thread 1204 are provided, and is advantageous for securely abutting the first abutment surface 3412 against the outer peripheral surface 2406 of the ring plate portion 24, the second abutment surface 3414 against the upper surface 2404 of the ring plate portion 24, and the third abutment surface 3416 against the outer peripheral surface 2602 of the first small diameter portion 26.

[0020] (Modification of the first embodiment) In the first embodiment, the extension line of the axis T of the bolt insertion hole 36 and the female thread 1204 intersects with the axis of the flange head 16, whereas in this modified example, the extension line of the axis T of the bolt insertion hole 36 and the female thread 1204 does not intersect with the axis of the flange head 16. In the following description of the embodiment, the same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and the description will focus on the parts that are different from the first embodiment. In this modified example, as shown in FIG. 8, when viewed in a plane, the bolt insertion holes 36 and the axes T of the female threads 1204 at both longitudinal ends of the main body 3402 are located on the same straight line, and the bolt insertion holes 36 and the axes T of the female threads 1204 of the clamp 34B of this modified example are inclined with respect to a normal line L (not shown) of the mounting surface 1202 so that the heads 44A of the two bolts 44 inserted into the bolt insertion holes 36 provided at both ends of the main body 3402 and screwed into the female threads 1204 are closer to each other and the lower parts 44B are farther apart. As shown in Figures 7 and 8, two bolts 44 are inserted into the bolt insertion holes 36 at both longitudinal ends of a pair of main body portions 3402 and screwed into the female threads 1204 of the mounting surface 1202, so that, as in the first embodiment, as shown in Figure 6, the second abutment surface 3414 presses the upper surface 2404 of the ring plate portion 24, and at the same time, the first abutment surface 3412 presses the outer peripheral surface 2406 of the ring plate portion 24 from both sides of the ring plate portion 24, and the third abutment surface 3416 presses the outer peripheral surface 2602 of the first small diameter portion 26, so that the pair of clamps 34A are attached to the mounting surface 1202 in a positioned state. As shown in FIG. 7, clamp 34B extends in an arc shape, and bolt 44 is located at both ends of the arc-shaped clamp, so that, similar to the first embodiment, a portion of head 4402 of bolt 44 is located on the protruding portion 3404 side of boundary B between main body portion 3402 and protruding portion 3404. Therefore, in this modified example, as in the first embodiment, the bolt insertion hole 36 and the axis T of the female thread 1204 are inclined with respect to the normal L of the mounting surface 1202 so that a portion of the head 4402 of the bolt 44 is located on the protruding portion 3404 side of the boundary B between the main body portion 3402 and the protruding portion 3404, thereby achieving the same effect as in the first embodiment.

[0021] In the above-described embodiment, the annular plate portion 24 of the flange head 16 provided at the end of the hose piping as the mounting portion is attached to the mounting surface 1202 of the control valve 10. However, the present invention is characterized in that the bolt is inclined with respect to the normal to the mounting surface, and the present invention is not limited to the mounting structure of the end of the hose piping, and the use of the present invention is arbitrary, and the present invention is applicable to mounting structures of various parts that are conventionally known. That is, the present invention is applicable to a mounting structure in which a mounting portion is mounted to a mounting surface by a mounting member. The mounting member is configured, for example, with a main body portion having a bolt insertion hole formed therethrough and a first abutment surface capable of abutting against the outer peripheral surface of the mounted part, and a protrusion portion protruding from a portion of the main body portion above the first abutment surface and having a second abutment surface capable of abutting against the upper surface of the mounted part. Then, with the first abutment surface abutting against the outer peripheral surface of the mounted portion and the second abutment surface abutting against the upper surface of the mounted portion, the bolt inserted into the bolt insertion hole is screwed into the female thread of the mounting surface, thereby pressing the mounted portion against the mounting surface and attaching it. In this case, the axes of the bolt insertion hole and the female thread are inclined with respect to the normal to the mounting surface so that at least a part of the head of the bolt inserted into the bolt insertion hole and screwed into the female thread is located on the protruding part side of the boundary between the main body and the protruding part. Therefore, the shear force generated at the boundary can be received by the head of the bolt, which is located on the protruding part side of the boundary, which alleviates stress concentration at the boundary between the main body and the protruding part and suppresses damage and deformation that occurs in the protruding part, which is advantageous in improving the durability of the mounting member and extending its lifespan. In this case, as in the first embodiment, the axes of the bolt insertion hole and the female thread may be inclined so that the lower part of the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced in a direction away from the attached portion more than the upper part. Also, as in the first embodiment, a seat may be provided on the upper surface of the mounting member around the bolt insertion hole, extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the head of the bolt to abut against it. [Explanation of symbols]

[0022] 10. Control valve 12 Mounting base 1202 Mounting surface 1204 Female thread 16 Flange Head 24 Ring plate part 2402 Bottom surface 2404 Top surface 2406 Outer surface 26 1st small diameter section 2602 Outer surface 28 2nd small diameter section 32 Clamp fitting 34 Pair of Clamps 34A, 34B Clamp 3402 Main body 3404 Protrusion 3412 1st contact surface 3414 Second contact surface 3416 Third contact surface 3418 Bottom surface 3420 Top 3422 Seat 36 Bolt insertion hole 44 Volts 4402 Head 44A Upper 44B Lower

Claims

1. a mounting member including a main body having a bolt insertion hole formed therethrough and a first abutment surface capable of abutting against an outer circumferential surface of a mounted part, and a protrusion protruding from a portion of the main body above the first abutment surface and having a second abutment surface capable of abutting against an upper surface of the mounted part, the mounting structure comprising: a bolt inserted into the bolt insertion hole, with the first abutment surface abutting against the outer circumferential surface of the mounted part and the second abutment surface abutting against the upper surface of the mounted part, and a female thread of the mounting surface is screwed into the mounting surface to press the mounted part against the mounting surface, the axis of the bolt insertion hole and the female thread is inclined with respect to the normal line of the mounting surface so that at least a part of the head of the bolt inserted into the bolt insertion hole and screwed into the female thread is located on the protruding portion side of the boundary between the main body portion and the protruding portion, A mounting structure for a mounted part.

2. The axes of the bolt insertion hole and the female thread are inclined such that the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced in a direction away from the attached portion at its lower portion more than at its upper portion.

2. The mounting structure for a mounted portion according to claim 1.

3. A seat surface is provided around the bolt insertion hole on the upper surface of the mounting member, the seat surface extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the head of the bolt to abut against the bolt.

3. The mounting structure for a mounting portion according to claim 1 or 2.

4. a pair of clamps disposed on both sides of a ring plate portion constituting a flange head at an end of a hose pipe, each clamp having a bolt insertion hole formed therethrough; Each of the clamps includes a main body portion extending along an outer circumferential surface of the ring plate portion, the main body portion being provided with the bolt insertion holes at both ends in the extending direction and having a first abutment surface capable of abutting against the outer circumferential surface of the ring plate portion, and a protruding portion protruding from a portion of the main body portion above the first abutment surface and having a second abutment surface capable of abutting against an upper surface of the ring plate portion, a mounting structure for a flange head at an end of a hose pipe, in which the ring plate portion is pressed against the mounting surface by screwing a bolt inserted through the bolt insertion hole into a female thread of a mounting surface with the first abutment surface abutting against an outer peripheral surface of the ring plate portion and the second abutment surface abutting against an upper surface of the ring plate portion, the axis of the bolt insertion hole and the female thread is inclined with respect to the normal line of the mounting surface so that at least a part of the head of the bolt inserted into the bolt insertion hole and screwed into the female thread is located on the protruding portion side of the boundary between the main body portion and the protruding portion, 1. A mounting structure for a flange head at the end of a hose pipe.

5. The flange head includes a first small diameter portion that protrudes from the annular plate portion and has a diameter smaller than that of the annular plate portion, The protruding portion has a third abutment surface capable of abutting against an outer circumferential surface of the first small diameter portion.

5. The structure for mounting a flange head at an end of a hose pipe according to claim 4.

6. the bolt insertion hole and the female thread have axial centers inclined such that the bolt inserted into the bolt insertion hole and screwed into the female thread is displaced in a direction away from the flange head at its lower portion more than at its upper portion; 6. The structure for mounting a flange head at an end of a hose pipe according to claim 4 or 5.

7. A seat is provided around the bolt insertion hole on the upper surface of the clamp, the seat extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the head of the bolt to abut against the bolt.

7. The structure for mounting a flange head at an end of a hose pipe according to claim 4.

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