JP7640853B2 - Mounting structure for a mounted part and a flange head mounting structure for an end of a hose pipe - Google Patents

Description

The present invention relates to an attachment structure for a mounting part and an attachment structure for a flange head at the end of a hose pipe.

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 connected. A ring plate portion is provided at a 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 having 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, so that the flange head is pressed against the mounting surface by the tightening force of the bolts, thereby connecting the first flow path and the second flow path.

JP 2015-215006 A JP 2002-188175 A

However, in the conventional technology described above, when the end of the hose pipe is attached to a mounting surface using a clamp fitting, the bolt that is inserted into the bolt insertion hole and screwed into the female thread is attached perpendicular to the mounting surface, so that the ring plate portion is pressed only perpendicular to the mounting surface.
As a result, conventional clamp fittings had weak gripping force in the lateral direction, which is the direction along the mounting surface, and if the hose piping attached to the mounting surface was subjected to lateral vibrations, it could be damaged or deformed.
In other words, the ring plate at the end of the hose pipe is pressed only vertically by the clamp, so the area of pressure is small and the hose pipe is fixed locally, resulting in stress concentration. If the hose pipe is displaced laterally due to lateral vibration, cracks will occur in thin areas such as the ring plate, causing damage and deformation.
The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide an attachment structure for an attachment part which distributes stress generated in the attachment member, suppresses damage or deformation of the attachment part, improves the durability of the attachment part and extends its lifespan by attaching the bolt so that the upper part of the bolt is inclined away from the attachment part more than the lower part.
Another object of the present invention is to provide a mounting structure for a flange head at the end of a hose piping which distributes the stress generated in a pair of clamps, suppressing damage or deformation to the ring plate portion of the flange head by mounting the bolt so that the upper part of the bolt is inclined away from the mounted portion more than the lower part, thereby improving the durability of the flange head and extending its lifespan.

In order to achieve the above-mentioned object, one embodiment of the present invention is an attachment structure comprising a mounting member having a main body portion with a bolt insertion hole formed therethrough, a first abutment surface provided on the main body portion and capable of abutting the outer peripheral surface of a mounted portion, and a second abutment surface provided on the main body portion and capable of abutting the upper surface of the mounted portion, in which, with the first abutment surface abutting the outer peripheral surface of the mounted portion and the second abutment surface abutting the upper surface of the mounted portion, a bolt inserted through the bolt insertion hole is screwed into a female thread on the mounting surface to press the mounted portion 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 the upper part of the bolt inserted through the bolt insertion hole and screwed into the female thread is inclined in a direction away from the mounted portion more than the lower part.
Moreover, one embodiment of the present invention is characterized in that the first contact surface is provided with a first friction portion having a friction coefficient with respect to an outer circumferential surface of the mounted portion that is larger than that of the first contact surface.
In addition, one embodiment of the present invention is characterized in that a seat surface is provided on the upper surface of the main body 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 relates to a mounting structure for a flange head at the end of a hose pipe, the mounting structure comprising a pair of clamps arranged on either side of a ring plate portion constituting a flange head at the end of a hose pipe, each having a bolt insertion hole formed therethrough, each of the clamps extending along the outer circumferential surface of the ring plate portion and having the bolt insertion hole formed at both ends in the extension direction, a first abutment surface provided on the clamp body and capable of abutting the outer circumferential surface of the ring plate portion, and a second abutment surface provided on the clamp body and capable of abutting the upper surface of the ring plate portion, the first abutment surface being abutted against the outer circumferential surface of the ring plate portion and the second abutment surface being abutted against the upper surface of the ring plate portion, and a bolt inserted through the bolt insertion hole is screwed into a female thread on the mounting surface to press the ring plate portion against the mounting surface, the bolt insertion hole and the female thread being inclined with respect to a normal to the mounting surface such that an upper portion of the bolt inserted through the bolt insertion hole and screwed into the female thread is inclined in a direction away from the flange head more than a lower portion.
Moreover, one embodiment of the present invention is characterized in that the first abutment surface is provided with a first friction portion having a friction coefficient with respect to an outer circumferential surface of the annular plate portion larger than that of the first abutment surface.
Moreover, one embodiment of the present invention includes a pair of clamps arranged on both sides of a ring plate portion constituting a flange head at an end of a hose pipe, each having a bolt insertion hole formed therethrough, the flange head including a first small diameter portion protruding from the ring plate portion and having a diameter smaller than that of the ring plate portion, and each of the clamps includes a clamp body extending along an outer circumferential surface of the ring plate portion and having the bolt insertion holes formed at both ends in the extending direction, a second abutment surface provided on the clamp body and capable of abutting against an upper surface of the ring plate portion, and a third abutment surface provided on the clamp body and capable of abutting against the outer circumferential surface of the first small diameter portion. a mounting structure for a flange head at the end of a hose pipe, in which the second abutment surface abuts against an upper surface of the ring plate portion and the third abutment surface abuts against an outer peripheral surface of the first small diameter portion, and a bolt inserted through the bolt insertion hole is screwed into the female thread of the mounting surface to press the ring plate portion against the mounting surface, wherein the axis of the bolt insertion hole and the female thread is inclined with respect to the normal to the mounting surface such that the upper part of the bolt inserted through the bolt insertion hole and screwed into the female thread is inclined in a direction away from the flange head more than the lower part.
Moreover, one embodiment of the present invention is characterized in that the third contact surface is provided with a third friction portion having a larger friction coefficient with respect to an outer circumferential surface of the first small diameter portion than the third contact surface.
In addition, one embodiment of the present invention is characterized in that each clamp further comprises a first abutment surface provided on the clamp body and capable of abutting against the outer peripheral surface of the ring plate portion, and the first abutment surface is provided with a first friction portion having a friction coefficient with respect to the outer peripheral surface of the ring plate portion greater than that of the first abutment surface.
Moreover, one embodiment of the present invention is characterized in that the flange head further includes a second small diameter portion protruding from the first small diameter portion and having a diameter smaller than the first small diameter portion, and each of the clamps further includes a fourth abutment surface provided on the clamp body and capable of abutting against an outer peripheral surface of the second small diameter portion, and the fourth abutment surface is provided with a fourth friction portion having a friction coefficient with respect to the outer peripheral surface of the second small diameter portion that is greater than that of the fourth abutment surface.
Furthermore, one embodiment of the present invention is characterized in that a seat surface is provided on the upper surface of the clamp body 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.

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, the axes of the bolt insertion hole and the female thread are inclined with respect to the normal to the attachment surface so that the upper part of the bolt inserted into the bolt insertion hole and screwed into the female thread is inclined in a direction away from the attached portion more than the lower part. This distributes the stress generated in the attachment member by tightening the bolt in the vertical and horizontal directions and fixes the bolt with vertical and horizontal fixing forces, thereby suppressing damage and deformation of the attached portion, which is advantageous in improving the durability of the attached portion and extending its lifespan.
Furthermore, if the first abutment surface is provided with a first friction portion having a larger friction coefficient with respect to the outer peripheral surface of the attached part than the first abutment surface, this is advantageous in preventing slippage between the first abutment surface and the outer peripheral surface of the attached part, and improving the fixing force of the attached part by the mounting member.
In addition, if the upper surface of the main body is provided with a seat around the bolt insertion hole, extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the bolt head to abut, this is advantageous in ensuring that the bolt is securely attached in the direction in which the bolt insertion hole and female thread are provided.

Furthermore, according to one embodiment of the present invention, in the mounting structure for a flange head at the end of a 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, the axes of the bolt insertion hole and the female thread are inclined with respect to the normal to the mounting surface so that the upper part of the bolt inserted into the bolt insertion hole and screwed into the female thread is inclined in a direction away from the flange head more than the lower part. This distributes the stress generated in the pair of clamps by tightening the bolt in the vertical and horizontal directions and fixes the bolt with vertical and horizontal fixing forces, thereby suppressing damage and deformation of the ring plate portion of the flange head, which is advantageous in improving the durability of the flange head and achieving a longer life.
Furthermore, if the first abutment surface is provided with a first friction portion having a friction coefficient with respect to the outer peripheral surface of the ring plate portion greater than that of the first abutment surface, this is advantageous in suppressing slippage between the first abutment surface and the outer peripheral surface of the ring plate portion and improving the fixing force of the flange head by the pair of clamps.
Furthermore, if the third abutment surface is provided with a third friction portion having a larger friction coefficient with respect to the outer peripheral surface of the first small diameter portion than that of the third abutment surface, this is advantageous in preventing slippage between the third abutment surface and the outer peripheral surface of the first small diameter portion, and improving the fixing force of the flange head by the pair of clamps.
Furthermore, if the fourth abutment surface is provided with a fourth friction portion having a larger friction coefficient with respect to the outer peripheral surface of the second small diameter portion than that of the fourth abutment surface, this is advantageous in preventing slippage between the fourth abutment surface and the outer peripheral surface of the second small diameter portion, and improving the fixing force of the flange head by the pair of clamps.
In addition, if a seat surface is provided on the upper surface of the clamp body around the bolt insertion hole, extending on a plane perpendicular to the axis of the bolt insertion hole and allowing the underside of the bolt head to abut, this is advantageous in ensuring that the bolt is securely attached in the direction in which the bolt insertion hole and female thread are provided.

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. 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 centers of the two bolts. FIG. 2 is a perspective view illustrating a state in which a flange head is attached to a mounting surface of a control valve via a bolt, a clamp fitting, and an O-ring. 1 is a side view illustrating a state in which a flange head is attached to a mounting surface of a control valve via a bolt, a clamp fitting, and an O-ring. FIG. 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). 1 is a diagram illustrating a state in which stress F generated in a clamp fitting due to tightening of a bolt is dispersed into stress Fx and stress Fy. FIG. 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 centers of the two bolts. FIG. 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 centers of the two bolts. FIG.

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 fitting 32 of this embodiment.

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 through the flange head 16 .
As shown in Figure 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 outline 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.

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. The first opening 18A (see FIG. 2) of the first flow passage 18 is positioned at the center of the lower surface 2402.
As shown in FIG. 2, a groove 2408 is provided in the lower surface 2402 so as to extend in an annular shape centered on the first opening 18A, and an O-ring 2410 is fitted in the groove 2408.
The upper surface 2404 constitutes the other surface in the thickness direction of the annular plate portion 24 and is formed as an annular flat surface, and the first small diameter portion 26 protrudes from the inner periphery of the upper surface 2404 .
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 .

As shown in FIG. 3, the control valve 10 is provided with a plurality of second flow passages 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 passages 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.

1 and 3, the clamp fitting 32 serving as the mounting member is arranged 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 arranged with respect to each other, and have the same shape.
As shown in Figures 3 and 5, each of the pair of clamps 34A is configured to include a clamp body 3402 (main body portion) extending along the outer circumferential surface 2406 of the ring plate portion 24 and having bolt insertion holes 36 at both ends in the extension direction, a first abutment surface 3404 provided on the clamp body 3402 and capable of abutting against the outer circumferential surface 2406 of the ring plate portion 24, a second abutment surface 3406 provided on the clamp body 3402 and capable of abutting against the upper surface 2404 of the ring plate portion 24, and a third abutment surface 3408 provided on the clamp body 3402 and capable of abutting against the outer circumferential surface 2602 of the first small diameter portion 26.
As shown in FIG. 5, the clamp body 3402 has a thickness in a direction perpendicular to the extending direction thereof, and a lower surface 3410, which is one surface in the thickness direction, is formed as a single flat surface.
That is, as shown in FIG. 5 , the clamp body 3402 extends in a semicircular arc shape along the extension direction, with a first abutment surface 3404 extending vertically upward from the inner end of the lower surface 3410, a second abutment surface 3406 extending horizontally inward from the upper end of the first abutment surface 3404, and a third abutment surface 3408 extending vertically upward from the end of the second abutment surface 3406.

Moreover, an upper surface 3412 which is the other surface in the thickness direction of the clamp body 3402 has a central portion in the extending direction formed by a single flat surface, and has seat surfaces 3414 on both ends in the extending direction.
The seat surface 3414 is provided on the upper surface of the clamp body 3402 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.

As shown in Figures 2 and 4, the axis T of the bolt insertion hole 36 provided in the clamp body 3402 and the female thread 1204 provided in the mounting surface 1202 is inclined with respect to the normal L of the mounting surface 1202 so that the bolt 44 inserted into the bolt insertion hole 36 and screwed into the female thread 1204 is inclined such that its upper portion 44A is inclined in a direction away from the flange head 16 more than its lower portion 44B.
In this embodiment, the axis T of the bolt insertion hole 36 and the female thread 1204 is formed at an incline so that it approaches the flange head 16 as it extends downward, and an 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. Therefore, when the bolt 44 is attached, the lower part 44B is positioned at an angle θ with respect to the normal line L so that it approaches the axis of the flange head 16.
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.
2 and 4, 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 8.4 degrees (0<θ≦8.4°). 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 8.4 degrees, the bolt 44 will hit the flange head 16, so in this embodiment, it is set to be equal to or less than 8.4 degrees.
The seat surface 3414 extends on a plane perpendicular to the axis of the bolt insertion hole 36, and is inclined at an angle θ with respect to the lower surface 3410 and the upper surface 3412 of the clamp 34A.

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 3404 of the clamp body 3402 abuts against the outer peripheral surface 2406 of the ring plate portion 24, the second abutment surface 3406 of the clamp body 3402 abuts against the upper surface 2404 of the ring plate portion 24, and the third abutment surface 3408 of the clamp body 3402 abuts against the outer peripheral surface 2602 of the first small diameter portion 26. In this state, a washer 42 is inserted into the bolt insertion hole 36 of the clamp body 3402, and the bolt 44 inserted into the bolt insertion hole 36 is screwed 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.

At this time, as described above, in this embodiment, the bolt insertion hole 36 and the axis T of the female thread 1204 are inclined with respect to the normal line L of the mounting surface 1202, so that the inclined stress F generated in the clamp body 3402 by tightening the bolt 44 can be dispersed (resolved) into a horizontal stress Fx and a vertical stress Fy, as shown in Fig. 6. Therefore, by tightening the bolt 44, the stresses Fy and Fx act on the pair of clamps 34A, causing them to move slightly obliquely, eliminating the gap with the flange head 16 and fixing the flange head 16.
That is, due to the stress Fy distributed from the stress F generated by the tightening of the bolt 44, as shown in FIG. 2, the second abutment surface 3406 of the clamp body 3402 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.
In addition, in order to ensure that the second abutment surface 3406 can reliably press the upper surface 2404 of the ring plate portion 24, a gap S is secured between the lower surface 3410 of the clamp body 3402 and the mounting surface 1202 when the second abutment surface 3406 is in contact with the upper surface 2404 of the ring plate portion 24.
Furthermore, due to stress Fx dispersed from stress F generated by tightening of bolt 44, the first abutment surface 3404 of clamp body 3402 presses against outer circumferential surface 2406 of ring plate portion 24, and the third abutment surface 3408 presses against outer circumferential surface 2602 of first small diameter portion 26, whereby clamp body 3402 presses flange head 16 toward the axis of flange head 16. Since four bolts 44 are provided along the outer periphery of flange head 16, clamp body 3402 clamps flange head 16 to restrain horizontal movement of flange head 16 and fix it.

Thus, according to this embodiment, in the mounting structure of the flange head at the end of the hose piping, in which the bolt 44 inserted into the bolt insertion hole 36 is screwed into the female thread 1204 of the mounting surface 1202 to press the flange head 16 against the mounting surface 1202, 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 upper part of the bolt 44 inserted into the bolt insertion hole 36 and screwed into the female thread 1204 is inclined in a direction away from the flange head 16 more than the lower part. Therefore, the stress F generated in the pair of clamps 34A by tightening the bolt 44 is distributed into a vertical stress Fy and a horizontal stress Fx, and fixed by vertical and horizontal fixing forces, thereby suppressing damage and deformation of the ring plate portion 24 of the flange head 16 and being advantageous in improving the durability of the flange head 16.
As described above, 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 set to be greater than 0 degrees and equal to or less than 8.4 degrees, but the greater the angle θ is within that range, the greater the horizontal stress Fx dispersed from the stress F generated in the clamp 34A becomes, and the greater the force with which the clamp body 3402 presses the flange head 16 toward the axis of the flange head 16. This makes it possible to increase the force suppressing the horizontal movement of the flange head 16, which is more advantageous in suppressing damage and deformation of the annular plate portion 24 and improving the durability of the flange head 16.
In addition, a seat 3414 is provided on the upper surface of the clamp body 3402 around the bolt insertion hole 36, 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 against it, which is advantageous in ensuring that the bolt 44 is securely attached in the direction in which the bolt insertion hole 36 and the female thread 1204 are provided.

Second Embodiment
Next, a second embodiment will be described.
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 or simplified, and the differences will be mainly described.
The second embodiment is similar to the first embodiment in that the axis T of the bolt insertion hole 36 and the female thread 1204 is inclined at an angle θ with respect to the normal L of the mounting surface 1202. However, unlike the first embodiment in which the first abutment surface 3404 and the third abutment surface 3408 provided on the clamp 34A are formed as flat surfaces, the second embodiment differs in that the first abutment surface 3404 and the third abutment surface 3408 in the second embodiment are surfaces having increased frictional resistance by providing a friction portion.

As shown in Figures 7 and 8, in this embodiment, the first abutment surface 3404 is provided with a first friction portion 4602 having a larger friction coefficient with respect to the outer peripheral surface 2406 of the ring plate portion 24 than the first abutment surface 3404, and the third abutment surface 3408 is provided with a third friction portion 4604 having a larger friction coefficient with respect to the outer peripheral surface 2602 of the first small diameter portion 26 than the third abutment surface 3408.
In this embodiment, the first contact surface 3404 is provided with a sharp-tipped serrated edge as a first friction portion 4602 , and the coefficient of friction with the outer circumferential surface 2406 of the ring plate portion 24 is greater than that of the first contact surface 3404 .
The third contact surface 3408 also has a sharp serrated edge as a third friction portion 4604 , and has a larger coefficient of friction with the outer circumferential surface 2602 of the first small diameter portion 26 than the third contact surface 3408 .
In this way, when serrated edges are provided on the first abutment surface 3404 and the third abutment surface 3408, the stress Fx distributed from the stress F generated by tightening the bolt 44 presses the first abutment surface 3404 of the clamp body 3402 against the outer peripheral surface 2406 of the ring plate portion 24, and presses the third abutment surface 3408 against the outer peripheral surface 2602 of the first small diameter portion 26, so that the first friction portion 4602 and the third friction portion 4604 respectively abut when fixing the flange head 16, thereby increasing the fixing force.

In this embodiment, the first abutment surface 3404 and the third abutment surface 3408 are configured to have serrated edges as friction portions, but various conventionally known structures for increasing the coefficient of friction, such as a fine uneven structure or multiple protrusions, can be applied as long as they have a larger coefficient of friction than the respective surfaces.
In the present embodiment, the serrated friction portion is provided on both the first contact surface 3404 and the third contact surface 3408, but it may be provided on only one of the surfaces. Even if a friction portion is provided on only one of the surfaces, the fixing force for fixing the flange head 16 can be increased.

In this way, according to this embodiment, in addition to the effects of the first embodiment, slippage between the first abutment surface 3404 provided with the first friction portion 4602 and the outer peripheral surface 2406 of the ring plate portion 24 is suppressed, and slippage between the third abutment surface 3408 provided with the third friction portion 4604 and the outer peripheral surface 2602 of the first small diameter portion 26 is suppressed, which is advantageous in improving the fixing force of the flange head 16 by the pair of clamps 34C.

Third Embodiment
The third embodiment is similar to the first embodiment in that the bolt insertion hole 36 and the axis T of the female thread 1204 are inclined at an angle θ with respect to the normal L of the mounting surface 1202. Whereas in the second embodiment, the first abutment surface 3404 and the third abutment surface 3408 are provided with friction portions, the third embodiment differs in that the thickness of the clamp body 3402 is increased to provide a fourth abutment surface 3416 that can abut against the outer peripheral surface 2802 of the second small diameter portion 28, and the first abutment surface 3404, the third abutment surface 3408, and the fourth abutment surface 3416 are provided with friction portions.

As shown in Figures 9 and 10, the pair of clamps 34D of this embodiment are formed to be thicker in the height direction perpendicular to the mounting surface 1202 than the pair of clamps 34D of the first embodiment, and are configured with a fourth abutment surface 3416 that is provided on the clamp body 3402 and can abut against the outer peripheral surface 2802 of the second small diameter portion 28.
Further, the pair of clamps 34D are provided on the clamp body 3402 and include a fifth contact surface 3418 that is capable of contacting the upper surface 2604 of the first small diameter portion 26 .
That is, as shown in FIG. 10, the clamp body 3402 extends in a semicircular arc shape along the extension direction (see FIG. 5), with a first abutment surface 3404 extending vertically upward from the inner end of the lower surface 3410, a second abutment surface 3406 extending horizontally inward from the upper end of the first abutment surface 3404, a third abutment surface 3408 extending vertically upward from the end of the second abutment surface 3406, a fifth abutment surface 3418 extending horizontally inward from the upper end of the third abutment surface 3408, and a fourth abutment surface 3416 extending vertically upward from the end of the fifth abutment surface 3418.

The fourth contact surface 3416 is provided with a fourth friction portion 4606 having a larger coefficient of friction with respect to the outer circumferential surface 2802 of the second small diameter portion 28 than the fourth contact surface 3416 .
In this embodiment, similarly to the second embodiment, the first abutment surface 3404 and the third abutment surface 3408 are provided with sharp serrated edges as the first friction portion 4602 and the third friction portion 4604, respectively.
Furthermore, in this embodiment, the fourth abutment surface 3416 also has a sharp serrated edge as a third friction portion 4606, and has a larger coefficient of friction with the outer circumferential surface 2802 of the second small diameter portion 28 than the fourth abutment surface 3416.
In this way, when serrated edges are provided on the first abutment surface 3404, the third abutment surface 3408, and the fourth abutment surface 3416, the stress Fx distributed from the stress F generated by tightening the bolt 44 causes the first abutment surface 3404 of the clamp body 3402 to be pressed against the outer peripheral surface 2406 of the ring plate portion 24, the third abutment surface 3408 to be pressed against the outer peripheral surface 2602 of the first small diameter portion 26, and further the fourth abutment surface 3416 to be pressed against the outer peripheral surface 2802 of the second small diameter portion 28, so that when the flange head 16 is fixed, the first friction portion 4602, the third friction portion 4604, and the fourth friction portion 4606 respectively abut, thereby further increasing the fixing force.

In this embodiment, the fourth abutment surface 3416 is configured to have a serrated edge as a friction portion. However, as in the second embodiment, various conventionally known structures for increasing the coefficient of friction, such as a fine uneven structure or a plurality of protrusions, can be applied as long as the coefficient of friction is greater than that of the fourth abutment surface 3416.
In addition, in this embodiment, serrated edges are provided on all of the first abutment surface 3404, the third abutment surface 3408, and the fourth abutment surface 3416, but it is also possible to configure the serrated edges to be provided on the first abutment surface 3404 and the fourth abutment surface 3416, or the third abutment surface 3408 and the fourth abutment surface 3416, or only on the fourth abutment surface 3416.

Thus, according to the present embodiment, in addition to the effects of the first embodiment, slippage is suppressed between the first abutment surface 3404 provided with the first friction portion 4602 and the outer peripheral surface 2406 of the ring plate portion 24, slippage is suppressed between the third abutment surface 3408 provided with the third friction portion 4604 and the outer peripheral surface 2602 of the first small diameter portion 26, and slippage is suppressed between the fourth abutment surface 3416 provided with the fourth friction portion 4606 and the outer peripheral surface 2802 of the second small diameter portion 28, which is advantageous in further improving the fixing force of the flange head 16 by the pair of clamps 34D.
In addition, since the horizontal positioning and fixing are performed by the first abutment surface 3404 having the first friction portion 4602, the third abutment surface 3408 having the third friction portion 4604, and the fourth abutment surface 3416 having the fourth friction portion 4606, the horizontal positioning and fixing may be performed by at least one of the first abutment surface 3404, the third abutment surface 3408, and the fourth abutment surface 3416, but using the three abutment surfaces, the first abutment surface 3404, the third abutment surface 3408, and the fourth abutment surface 3416 as in this embodiment, is advantageous in further improving the fixing force of the flange head 16.

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, to have a main body portion with a bolt insertion hole formed therethrough, a first abutment surface provided on the main body portion and capable of abutting against the outer peripheral surface of the mounted portion, and a second abutment surface provided on the main body portion and capable of abutting against the upper surface of the mounted portion.
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 the upper part of the bolt inserted into the bolt insertion hole and screwed into the female thread is inclined in a direction away from the attached part more than the lower part.Therefore, the stress generated in the mounting member by tightening the bolt is distributed in the vertical and horizontal directions, and by fixing it with vertical and horizontal fixing forces, damage and deformation of the attached part can be suppressed, the durability of the attached part can be improved and its lifespan can be extended.
In this case, as in the second embodiment, the first contact surface may be provided with a first friction portion having a larger coefficient of friction with respect to the outer circumferential surface of the mounted portion than the first contact surface.
Furthermore, as in the first embodiment, a seat may be provided on the upper surface of the main body 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.

10 control valve 12 mounting seat 1202 mounting surface 1204 female thread 16 flange head 24 ring plate portion 2402 lower surface 2404 upper surface 2406 outer circumferential surface 26 first small diameter portion 2602 outer circumferential surface 2604 upper surface 28 second small diameter portion 2802 outer circumferential surface 32 clamp metal fitting 34 pair of clamps 34A, 34C, 34D clamp 3402 clamp body 3404 first abutment surface 3406 second abutment surface 3408 third abutment surface 3410 lower surface 3412 upper surface 3414 seat surface 3416 fourth abutment surface 3418 fifth abutment surface 36 bolt insertion hole 44 bolt 44A upper portion 44B lower portion

Claims (10)

a mounting member having a main body portion with a bolt insertion hole formed therethrough, a first abutment surface provided on the main body portion and capable of abutting an outer circumferential surface of a mounted portion, and a second abutment surface provided on the main body portion and capable of abutting an upper surface of the mounted portion, wherein the mounted portion is attached to the mounting surface by pressing the mounted portion against the mounting surface with a bolt inserted through the bolt insertion hole and screwing it into a female thread of the mounting surface while the first abutment surface is abutted against the outer circumferential surface of the mounted portion and the second abutment surface is abutted against the upper surface of the mounted portion,
The axis of the bolt insertion hole and the female thread is inclined with respect to the normal line of the mounting surface such that the bolt inserted into the bolt insertion hole and screwed into the female thread is inclined such that an upper portion of the bolt is inclined in a direction away from the mounted portion more than a lower portion of the bolt.
A mounting structure for a mounted part. The first contact surface is provided with a first friction portion having a friction coefficient with respect to an outer circumferential surface of the attached portion that is larger than that of the first contact surface.
2. The mounting structure for a mounted portion according to claim 1. A seat is provided around the bolt insertion hole on the upper surface of the main body, 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.
3. The mounting structure for a mounting portion according to claim 1 or 2. 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 clamp body extending along an outer circumferential surface of the ring plate portion and having the bolt insertion holes at both ends in the extending direction thereof, a first abutment surface provided on the clamp body and capable of abutting against the outer circumferential surface of the ring plate portion, and a second abutment surface provided on the clamp body and 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 into 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 such that the bolt inserted into the bolt insertion hole and screwed into the female thread is inclined such that an upper portion of the bolt is inclined in a direction away from the flange head more than a lower portion of the bolt.
1. A mounting structure for a flange head at the end of a hose pipe. The first contact surface is provided with a first friction portion having a friction coefficient with respect to an outer circumferential surface of the annular plate portion larger than that of the first contact surface.
5. The structure for mounting a flange head at an end of a hose pipe according to claim 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;
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,
Each of the clamps includes a clamp body extending along an outer circumferential surface of the ring plate portion and having the bolt insertion holes at both ends in the extending direction thereof, a second abutment surface provided on the clamp body and capable of abutting against an upper surface of the ring plate portion, and a third abutment surface provided on the clamp body and capable of abutting against an outer circumferential surface of the first small diameter 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 into the bolt insertion hole into a female thread of a mounting surface with the second abutment surface in contact with an upper surface of the ring plate portion and the third abutment surface in contact with an outer circumferential surface of the first small diameter portion,
the axis of the bolt insertion hole and the female thread is inclined with respect to the normal line of the mounting surface such that the bolt inserted into the bolt insertion hole and screwed into the female thread is inclined such that an upper portion of the bolt is inclined in a direction away from the flange head more than a lower portion of the bolt.
1. A mounting structure for a flange head at the end of a hose pipe. a third friction portion having a larger friction coefficient with respect to an outer circumferential surface of the first small diameter portion than the third contact surface is provided on the third contact surface;
7. The structure for mounting a flange head at an end of a hose pipe according to claim 6. Each of the clamps further includes a first abutment surface provided on the clamp body and capable of abutting against an outer circumferential surface of the ring plate portion,
The first contact surface is provided with a first friction portion having a friction coefficient with respect to an outer circumferential surface of the annular plate portion larger than that of the first contact surface.
8. The structure for mounting a flange head at an end of a hose pipe according to claim 7. The flange head further includes a second small diameter portion protruding from the first small diameter portion and having a smaller diameter than the first small diameter portion,
Each of the clamps further includes a fourth abutment surface provided on the clamp body and capable of abutting against an outer circumferential surface of the second small diameter portion,
a fourth friction portion having a larger friction coefficient with respect to an outer circumferential surface of the second small diameter portion than the fourth contact surface is provided on the fourth contact surface;
9. The structure for mounting a flange head at an end of a hose pipe according to claim 7 or 8. A seat is provided around the bolt insertion hole on the upper surface of the clamp body, 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.
10. The structure for mounting a flange head at an end of a hose pipe according to claim 4.

Images