JP2017106601A - Hydraulic hose connection part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a fastening state of a connection part between a hydraulic hose and a connection object member from being loosened and to restrain bending of the hydraulic hose.SOLUTION: A hydraulic hose connection part structure 1 connecting a hydraulic hose 20 provided in a transport vehicle to a connection object member (an elbow pipe 13) with a screw part 13 comprises: an annular first spacer 17 that comes into contact with the end face of a cap 21 provided at the end of the hydraulic hose 20 and that surrounds the screw part 13; an annular second spacer 27 that surrounds the hydraulic hose 20; a cylindrical member 30 which extends from the first spacer 17 toward the second spacer 27, the one end part of which surrounds the first spacer 17, and the other end part of which surrounds the second spacer 27; first binding means 31 for fastening the cylindrical member 30 to the first spacer 17; and second binding means 32 for fastening the cylindrical member 30 to the second spacer 27.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hydraulic hose connection structure.

  Transport vehicles such as trucks and trailers are equipped with movable parts (opening / closing wings, tailgates, attached cranes, etc.). In general, a hydraulic mechanism is employed for the operation of the movable part. However, in transportation vehicles, measures against oil leakage at the connecting portion between the hydraulic cylinder and the hydraulic hose are often not taken.

  In addition, in the hydraulic mechanism of heavy machinery that is not a transport vehicle, such as construction machinery, where the hydraulic pressure is high, cover the connection between the hydraulic cylinder and the hydraulic hose and the entire hydraulic hose with a protective cover. The structure which prevented that the oil which leaked from the damaged part of this leaks outside was employ | adopted (refer patent document 1). The protective cover of patent document 1 is comprised from the sheet | seat member which has flexibility, and forms the cylinder shape which covers a hydraulic hose by adhering the surface fasteners provided in the both ends of the sheet | seat member. It was. Accordingly, the protective cover is also bent following the hydraulic hose that is bent along with the operation of the heavy machinery.

JP 2012-189198 A

  If no measures are taken against oil leakage, the hydraulic hose base may loosen and oil may leak, but it is difficult to detect in the early stage when the base starts to loosen. When the base loosens, the base may come off and a large amount of oil may leak. In addition, since the hydraulic cylinder tilts in response to the opening / closing wings and the rotation of the tailgate, the hydraulic hose is often bent at a steep angle following the hydraulic cylinder. In particular, the hydraulic hose is locally bent at a steep angle at the boundary between the caulked portion at the end of the base and the hydraulic hose extending outward. When such sharp bending of the hydraulic hose is repeated, the hydraulic hose may be cracked.

  The protective cover of Patent Document 1 is only for collecting oil leaking from the damaged part of the connection part or the hydraulic hose, and no measures are taken for loosening of the tightened state of the bolts and nuts of the connection part. It was. Furthermore, since the protective cover of Patent Document 1 is bent following the hydraulic hose, the bending of the hydraulic hose cannot be suppressed.

  Then, this invention makes it a subject to provide the hydraulic hose connection part structure which can suppress that the fastening state of the connection part of a hydraulic hose and a to-be-connected member loosens, and can suppress the bending of a hydraulic hose.

  The present invention for solving the above problems is provided at an end portion of the hydraulic hose in a hydraulic hose connection portion structure for connecting a hydraulic hose provided in a transport vehicle and a connected member having a screw portion. An annular first spacer that contacts the end face of the base and surrounds the screw portion, an annular second spacer that surrounds the hydraulic hose, and extends from the first spacer to the second spacer, and one end thereof is the first spacer. A cylindrical member surrounding one spacer and the other end surrounding the second spacer; a first binding means for fastening the tubular member to the first spacer; and a second for fastening the tubular member to the second spacer. A hydraulic hose connection part structure comprising a binding means.

  The hydraulic hose provided in the transport vehicle is connected to an opening / closing device such as an opening / closing wing and a tailgate, and a cargo handling device such as an attached crane for loading / unloading a load on the transport vehicle. According to the above configuration, the first spacer attached to the threaded portion of the connected member is surrounded by one end of the cylindrical member and tightened by the first binding means, and the second spacer attached to the hydraulic hose is attached. By surrounding with the other end part of the cylindrical member and tightening with the second bundling means, the screw part of the connected member and the hydraulic hose are connected via the cylindrical member. Thereby, since the relative rotation of the screw portion and the hydraulic hose is suppressed, it is possible to suppress the tightening state of the connecting portion between the hydraulic hose and the connected member from being loosened. Furthermore, since the cylindrical member covers the connecting portion between the hydraulic hose and the base, the cylindrical member can receive a force for bending the hydraulic hose. As a result, the hydraulic hose and the cylindrical member are gently bent in the vicinity of the connecting portion between the hydraulic hose and the base, so that the hydraulic hose can be prevented from being locally bent at a steep angle, and the hydraulic hose Bending can be suppressed.

  In addition, the inner peripheral surface of the first spacer is in close contact with the outer peripheral surface of the screw portion, the outer peripheral surface of the first spacer is in close contact with the inner peripheral surface of the cylindrical member, and the second spacer It is preferable that the inner peripheral surface of the second spacer is in close contact with the outer peripheral surface of the hydraulic hose and the outer peripheral surface of the second spacer is in close contact with the inner peripheral surface of the cylindrical member. According to such a configuration, the inside and outside of the cylindrical member are partitioned in a liquid-tight manner, so that in the unlikely event that oil leaks from the connecting portion between the hydraulic hose and the connected member inside the cylindrical member. However, oil can be prevented from leaking from the inside of the cylindrical member to the outside.

  Furthermore, it is preferable that the cylindrical member is made of a material having translucency. According to such a configuration, it can be confirmed from the outside whether or not the oil is leaking inside the cylindrical member, so that the countermeasure when the oil leaks is performed before the oil leaks to the outside be able to.

  The second spacer is preferably made of an elastic member, and the second spacer is preferably formed with a slit extending from the inner peripheral surface to the outer peripheral surface. According to such a configuration, the second spacer can be easily attached to the hydraulic hose by expanding the second spacer from the slit portion.

  Furthermore, when a nut is provided in the screw portion, the first spacer may be sandwiched between the tip portion of the base and the nut. According to such a configuration, a frictional force is generated between the first spacer and the base, and a frictional force is generated between the first spacer and the nut, so that the base and the nut are relatively difficult to rotate. Therefore, the loosening prevention effect of the tightened state of the connecting portion between the hydraulic hose and the connected member is further increased.

  Further, a step portion is formed at the base end portion of the screw portion, and when the washer surrounding the screw portion is attached to the step portion, the first spacer is connected to the tip portion of the base. It is good to pinch with the washer. According to such a configuration, since the first spacer is sandwiched between the base and the washer, a frictional force is generated between the first spacer and the base. This makes it difficult for the base and the first spacer to rotate relatively. Therefore, the loosening prevention effect of the tightened state of the connecting portion between the hydraulic hose and the connected member is further increased.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the fastening state of the connection part of a hydraulic hose and a to-be-connected member loosens, and can suppress bending of a hydraulic hose.

(A) is the top view which showed the state which connected the hydraulic hose and the hydraulic cylinder using the hydraulic hose connection part structure which concerns on embodiment of this invention, (b) is sectional drawing. It is the figure which showed the operating state of the opening / closing wing and the hydraulic cylinder, Comprising: (a) is a top view, (b) is a side view. It is the disassembled perspective view which showed the hydraulic hose connection part structure which concerns on embodiment of this invention. (A)-(d) is the figure which showed the assembly process of the hydraulic hose connection part structure which concerns on embodiment of this invention. (A) is the front view which showed the 1st spacer which concerns on this embodiment, (b), (c) and (d) are the front views which showed the 1st spacer which concerns on a modification. (A) is sectional drawing which showed the hydraulic hose connection part structure which concerns on the 1st modification of embodiment of this invention, (b) is the hydraulic hose connection part structure which concerns on the 2nd modification of embodiment of this invention. It is sectional drawing which showed. It is sectional drawing which showed the hydraulic hose connection part structure which concerns on 2nd embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 2, the hydraulic hose connection portion structure 1 according to this embodiment connects a hydraulic cylinder 10 for opening and closing an opening / closing wing 2 provided on a truck or trailer to a hydraulic hose 20 of a hydraulic pipe 3. Has been applied to.

  The proximal end portion of the hydraulic cylinder 10 is attached to the fixed side, and the distal end portion of the hydraulic cylinder 10 is attached to the opening / closing wing 2. When the hydraulic cylinder 10 is extended, the opening / closing wing 2 is lifted, the hydraulic cylinder 10 and the opening / closing wing 2 are rotated upward, and the opening / closing wing 2 is opened (indicated by a two-dot chain line in FIG. 2B). . The hydraulic cylinder 10 is of a double-acting piston type, and separate hydraulic hoses 20 and 20 are provided in both the distal end pressure chamber (not shown) and the proximal end pressure chamber (not shown). Each is connected.

  As shown in FIGS. 1 and 3, the hydraulic hose 20 is connected to an elbow pipe 11 connected to the hydraulic cylinder 10. In this embodiment, the elbow pipe 11 is a connected member. The elbow pipe 11 is bent at an angle of 90 degrees and includes screw parts 12 and 13 at both ends. A nut portion 14 is formed at the base end portion of one screw portion 12 screwed into the hydraulic cylinder 10. The elbow pipe 11 is firmly fastened to the female thread portion of the hydraulic cylinder 10 using the nut portion 14. A stepped portion having a diameter larger than that of the screw portion 13 is formed at the base end portion of the other screw portion 13 screwed to the hydraulic hose 20 side. A tapered surface 16 that is reduced in diameter toward the tip is formed at the tip of the screw portion 13.

  A base 21 is attached to the tip of the hydraulic hose 20. The base 21 includes a tightening tube portion 22 and a socket portion 23. The tightening cylinder portion 22 is fixed to the distal end portion of the hydraulic hose 20. A cylindrical portion 24 is formed at the distal end portion of the tightening cylindrical portion 22. The outer peripheral part of the cylinder part 24 is nut shape. A receiving portion 22a extending inside the socket portion 23 is formed at the tip of the tightening tube portion 22 (see FIG. 1B). The tapered surface 16 at the tip of the screw portion 13 is in close contact with the receiving portion 22a. The socket part 23 is provided so as to surround the receiving part 22 a and is attached to the fastening cylinder part 22 so as to be rotatable. An internal thread portion 25 is formed on the inner periphery of the socket portion 23. A nut portion 26 is formed on the outer periphery of the socket portion 23.

  The hydraulic hose connection part structure 1 for connecting the hydraulic hose 20 having such a base 21 and the elbow pipe 11 (member to be connected) has a first spacer 17 attached to the elbow pipe 11 and the hydraulic hose 20. The attached second spacer 27, a cylindrical member 30 that connects the first spacer 17 and the second spacer 27, a first binding means 31, and a second binding means 32 are provided.

  The first spacer 17 is made of an elastic material such as oil-resistant rubber and is formed in an annular shape (ring shape). The first spacer 17 may be formed of a material having both oil resistance and elasticity, such as polyvinyl chloride and silicon rubber, in addition to the oil resistant rubber. The first spacer 17 is disposed so as to surround the screw portion 13 of the elbow pipe 11. The inner peripheral surface of the first spacer 17 is in close contact with the outer peripheral surface of the screw portion 13, and the first spacer 17 is fitted to the screw portion 13. The first spacer 17 is pushed to the base end portion of the screw portion 13, and the inner peripheral edge portion of one side end surface of the first spacer 17 is in contact with the end surface 15 of the step portion. In a state where the screw portion 13 is attached to the socket portion 23 of the base 21, the other side end surface of the first spacer 17 is in contact with the distal end surface of the socket portion 23. That is, the first spacer 17 is sandwiched between the socket part 23 and the step part. The outer diameter of the first spacer 17 is equal to or slightly larger than the diagonal distance of the socket portion 23. The outer diameter of the first spacer 17 is equal to the inner diameter of the cylindrical member 30, and the outer peripheral surface of the first spacer 17 is in close contact over the entire inner peripheral surface of the cylindrical member 30, One spacer 17 is fitted to the cylindrical member 30.

  The second spacer 27 is made of an elastic material such as oil-resistant rubber and is formed in an annular shape (tubular shape). The axial length of the second spacer 27 is longer than the axial length of the first spacer 17 and longer than the diameter of the second spacer 27. The second spacer 27 is disposed so as to surround the hydraulic hose 20. As shown in FIG. 3 and FIG. 5A, the second spacer 27 is formed with a slit 28 extending from the inner peripheral surface to the outer peripheral surface. The slit 28 is formed over the entire axial length of the second spacer 27. The second spacer 27 is configured to be able to open and close the slit 28 elastically. The inner diameter of the second spacer 27 is substantially the same as the outer diameter of the hydraulic hose 20. Specifically, the inner diameter of the second spacer is preferably the outer diameter of the hydraulic hose 20 +0 to 1.0 mm (preferably 0 to 0.8 mm). With this dimension, the tolerance of the outer diameter of the hydraulic hose 20 can be absorbed. When the second spacer 27 is attached to the hydraulic hose 20 while increasing the width of the slit 28 of the second spacer 27, the gap of the slit 28 is eliminated. At this time, the inner peripheral surface of the second spacer 27 is in close contact with the entire outer periphery of the hydraulic hose 20, and the second spacer 27 is fitted to the hydraulic hose 20. The outer diameter of the second spacer 27 is equal to the outer diameter of the first spacer 17 and is equal to the inner diameter of the cylindrical member 30. Accordingly, the outer peripheral surface of the second spacer 27 is in close contact with the entire inner peripheral surface of the cylindrical member 30, and the second spacer 27 is fitted to the cylindrical member 30.

  As shown in FIGS. 1 and 3, the cylindrical member 30 is constituted by a cylindrical transparent soft vinyl hose, and the inside is visible. Note that the cylindrical member 30 is not limited to being transparent, and may be made of a translucent or colored material as long as it has translucency. The cylindrical member 30 extends from the first spacer 17 to the second spacer 27 with the same diameter. One end of the cylindrical member 30 in the axial direction surrounds the first spacer 17 and is in close contact with the outer peripheral surface thereof. The other axial end of the cylindrical member 30 surrounds the second spacer 27 and is in close contact with the outer peripheral surface thereof. The cylindrical member 30 also serves to store and store oil in the cylindrical member 30 in the event that oil leaks from the connecting portion. This can prevent oil from leaking outside.

  From the viewpoint of twisting, the axial length of the cylindrical member 30 is less likely to be twisted as it is shorter, and relatively difficult to rotate between the two ends. Shorter is more advantageous. On the other hand, considering the storage capacity inside the cylindrical member 30, the storage capacity increases as the axial length of the cylindrical member 30 increases, and the storage capacity decreases as the length becomes shorter. Therefore, the axial length of the cylindrical member 30 is such that one end portion and the other end portion of the cylindrical member 30 do not rotate relative to each other more than a predetermined value, and the cylindrical member 30 can secure a storage capacity that exceeds a certain value. In addition, the thickness is appropriately set including the thickness. As a result, the first spacer 17 fitted to the threaded portion 13 of the elbow pipe 11 and the second spacer 27 fitted to the outer peripheral surface of the hydraulic hose 20 can be made difficult to rotate relative to each other. Storage capacity can be secured.

  The 1st binding means 31 consists of resin-made binding bands, and is fixed by inserting the band part 31b in the head part 31a. The first bundling means 31 fastens the cylindrical member 30 to the first spacer 17 by tightening it while covering the outer peripheral surface of the cylindrical member 30. The tightened cylindrical member 30 has high adhesion to the first spacer 17. Further, the first spacer 17 is pressed against the screw portion 13 and the fitting property to the screw portion 13 is high.

  The second binding means 32 is made of a resin binding band equivalent to the first binding means 31, and is fixed by inserting the band portion 32b into the head portion 32a. The second bundling means 32 fastens the tubular member 30 to the second spacer 27 by tightening it while covering the outer peripheral surface of the tubular member 30. The tightened cylindrical member 30 has high adhesion to the second spacer 27. Further, the second spacer 27 is pressed against the hydraulic hose 20 and the fitting property to the hydraulic hose 20 is high. In addition, the shape and material of the 1st binding means 31 and the 2nd binding means 32 are not limited to the said structure. For example, it may be a metal binding band, a belt-like one, or a rubber ring-like one.

  Next, an assembly procedure of the hydraulic hose connection part structure 1 having the above configuration will be described with reference to FIG.

  First, as shown in FIG. 4A, the base 21 at the tip of the hydraulic hose 20 is inserted into the tubular member 30. Further, the first spacer 17 is fitted into the threaded portion 13 of the elbow pipe 11 and brought into contact with the end surface 15 of the stepped portion (see the state of FIG. 4B).

  Next, as shown in FIG. 4B, the screw portion 13 is inserted into the socket portion 23 of the base 21, and the nut portion 26 is rotated to press the screw portion 13 against the receiving portion 22a. At this time, the first spacer 17 is sandwiched between the end surface 15 of the step portion of the elbow pipe 11 and the front end surface of the socket portion 23 of the base 21 in a slightly compressed state. As a result, the first spacer 17 can obtain a frictional force with the end surface 15 of the stepped portion and a frictional force with the front end surface of the socket portion 23 in addition to the frictional force due to the fitting to the screw portion 13.

  Thereafter, as shown in FIG. 4C, the cylindrical member 30 is moved to the distal end side of the base 21, and one end portion of the cylindrical member 30 is fitted to the first spacer 17. At this time, since the diagonal distance of the nut portion 26 is smaller than the outer diameter of the first spacer 17, the nut portion 26 does not interfere with the cylindrical member 30. Thereafter, the body 28 of the hydraulic hose 20 is covered with the slit 28 of the second spacer 27 opened. The slit 28 is closed by the restoring force of the second spacer 27, and the inner peripheral surface of the second spacer 27 is fitted to the outer peripheral surface of the hydraulic hose 20.

  Next, as shown in FIG. 4 (d), the second spacer 27 is slid inside the other end of the cylindrical member 30 in a state of being fitted to the outer peripheral surface of the hydraulic hose 20, and the second The outer peripheral surface of the spacer 27 is fitted into the cylindrical member 30. Then, one end of the cylindrical member 30 is fastened to the first spacer 17 by the first binding means 31. Further, the other end of the cylindrical member 30 is fastened to the second spacer 27 by the second binding means 32. Thereby, the assembly of the hydraulic hose connection part structure 1 is completed.

  According to such a hydraulic hose connection part structure 1, the first spacer 17 attached to the screw part 13 of the elbow pipe 11 is tightened by the first binding means 31 in a state surrounded by one end part of the cylindrical member 30. Thus, the screw portion 13, the first spacer 17, and the cylindrical member 30 are integrated. Further, the second spacer 27 attached to the hydraulic hose 20 is surrounded by the other end of the cylindrical member and tightened by the second bundling means 32, so that the hydraulic hose 20, the second spacer 27, and the cylindrical member 30 are Integrated. As a result, the screw portion 13 and the hydraulic hose 20 are connected to each other via the cylindrical member 30, so that the relative rotation of the screw portion 13 and the hydraulic hose 20 is suppressed. Therefore, it is possible to suppress the tightening state of the connecting portion between the hydraulic hose 20 and the elbow pipe 11 from being loosened.

  Moreover, since the axial direction length of the cylindrical member 30 is such a length that the cylindrical portion is hardly twisted, both end portions of the cylindrical member 30 are relatively difficult to rotate. Therefore, the loosening suppression effect of the connection part between the hydraulic hose 20 and the elbow pipe 11 is increased. Furthermore, since the first spacer 17 is also in contact with the distal end surface of the base 21 in the compressed state, a frictional force is generated between the first spacer 17 and the base 21 and the loosening suppression effect is further increased.

  Furthermore, in this embodiment, since the cylindrical member 30 covers the connection part (clamping cylinder part 22) of the hydraulic hose 20 and the base 21, the force to bend the hydraulic hose 20 is applied to the cylindrical member 30. But you can get it. That is, since the bending force acting near the connection portion between the hydraulic hose 20 and the base 21 is reduced, the hydraulic hose 20 and the cylindrical member 30 are gently bent over the entire length of the cylindrical member 30. The hydraulic hose 20 can be prevented from being locally bent at a steep angle, and the bending of the hydraulic hose 20 can be suppressed.

  On the other hand, the first spacer 17 is fitted to both the screw portion 13 and the cylindrical member 30, and the second spacer 27 is fitted to both the hydraulic hose 20 and the cylindrical member 30. The inside and outside of the member 30 are partitioned in a liquid-tight manner. As a result, even if oil leaks from the connecting portion between the hydraulic hose 20 and the elbow pipe 11 inside the cylindrical member 30, the oil can be stored inside the cylindrical member 30. Oil can be prevented from leaking from the inside to the outside.

  Moreover, since the cylindrical member 30 is transparent, it can be visually recognized from the outside that oil has accumulated inside (that oil has leaked from the connecting portion). In particular, since the hydraulic cylinder 10 of the open / close wing 2 is disposed above the vehicle and it is difficult to confirm oil leakage from the vicinity, the effect of being able to visually confirm oil leakage from the lower side of the vehicle is great.

  The visual inspection of the hydraulic hose connection part structure 1 is performed periodically, and if the oil leakage is confirmed, maintenance can be performed as soon as possible to prevent leakage of the oil to the outside. As a result, it is possible to save the burden on the environment and the trouble of cleaning each part of the transport vehicle and the road surface.

  In the present embodiment, the slit 28 is formed in the second spacer 27, so that the mounting to the hydraulic hose 20 can be easily performed. In addition, it can be attached to the existing hydraulic hose 20.

  Note that the shape of the second spacer 27 is not limited to the shape of the present embodiment. For example, as shown in FIG. 5 (b), a slit may not be provided. In this case, the second spacer 27 is attached to the hydraulic hose 20 in advance before the base 21 is installed. Further, as shown in FIG. 5C, the slit 28a may be formed wide and the fan-shaped wedge member 29 may be fitted in the space. Further, as shown in FIG. 5 (d), the cylindrical cross section may be cut in the radial direction and divided into two, and the semicircular arc-shaped divided bodies 27a and 27b may be sandwiched from both sides of the hydraulic hose.

  Next, the configuration of the hydraulic hose connection part structure 1 according to a modification of the present embodiment will be described with reference to FIG. As shown to (a) of FIG. 6, in the 1st modification, the nut 40 is provided in the base end part of the thread part 13 of the elbow pipe 11. As shown in FIG. The nut 40 has an outer diameter and an inner diameter equivalent to the nut portion 26 of the socket portion 23 of the base 21. The nut 40 is screwed into the screw portion 13 and is in contact with the end surface 15 of the step portion of the elbow pipe 11. The screw part 13 is formed longer than the screw part 13 of the above-described embodiment by the thickness of the nut 40. Since other configurations are the same as those in the above-described embodiment, the same reference numerals are given and description thereof is omitted. The nut 40 may be formed integrally with the base end portion of the screw portion instead of being screwed to the screw portion 13.

  According to such a configuration, the first spacer 17 is sandwiched between the nut 40 and the socket portion 23. Since the frictional force corresponding to the contact between the side surface of the first spacer 17 and the side surface 40a of the nut 40 is larger than that in the above embodiment, the effect of preventing the rotation of the first spacer 17 is increased. As a result, the effect of preventing loosening between the base 21 and the elbow pipe 11 can be further increased.

  As shown in FIG. 6B, in the second modification, a washer 41 is provided instead of the nut 40. The washer 41 is attached to the screw portion 13 and is in contact with the end surface 15 of the step portion of the elbow pipe 11. The screw part 13 is formed longer than the screw part 13 of the above-described embodiment by the thickness of the washer 41. Since other configurations are the same as those in the above embodiment, the same reference numerals are given and description thereof is omitted.

  According to such a configuration, the first spacer 17 is sandwiched between the washer 41 and the socket part 23. Since the frictional force corresponding to the contact between the side surface of the first spacer 17 and the side surface 41a of the washer 41 is greater than that in the above embodiment, the effect of preventing the first spacer 17 from rotating is increased. As a result, the effect of preventing loosening between the base 21 and the elbow pipe 11 can be further increased.

  Next, the configuration of the hydraulic hose connection part structure 1a according to the second embodiment will be described with reference to FIG. The hydraulic hose connection part structure 1a of the second embodiment is a structure in a case where the hydraulic hose 20 is connected in a straight line to a pipe to be connected or another hydraulic hose. In this case, a linear adapter 50 is used as the connected member. The adapter 50 includes a nut portion 51 and a pair of screw portions 52 and 53 provided at both axial ends of the nut portion 51. The nut part 51 and the screw parts 52 and 53 are integrally formed. A tapered surface 54 that is reduced in diameter toward the distal end is formed at the distal end of the screw portion 52 attached to the base 21. The tapered surface 54 is in close contact with the receiving portion 22 a provided inside the socket portion 23. The first spacer 17 is sandwiched between the front end surface of the socket portion 23 and the side surface 51 a of the nut portion 51. Since other configurations are the same as those in the above-described embodiment, the same reference numerals are given and description thereof is omitted.

  According to such a configuration, the first spacer 17 is sandwiched between the nut portion 51 and the socket portion 23. Since the frictional force corresponding to the contact between the side surface of the first spacer 17 and the side surface 51a of the nut portion 51 is larger than that in the above embodiment, the effect of preventing the rotation of the first spacer 17 is increased (see (a) of FIG. 6). Equivalent to configuration). As a result, the effect of preventing loosening between the base 21 and the elbow pipe 11 can be further increased. Moreover, the hydraulic hose 20 and a pipe or another hydraulic hose can be connected in a straight line.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not the meaning limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the elbow tube 11 and the adapter 50 in which the threaded portions are formed at both ends are used as the connected member, but the present invention is not limited to this. As long as one side is provided with a screw part screwed into the socket part 23, the other may be a socket part provided with a female screw part.

  Moreover, in the said embodiment, although the outer peripheral surface of the 2nd spacer 27 is flat cylindrical shape, it is not limited to this. For example, the groove portion extending in the circumferential direction along the second bundling means 32 is formed in one or a plurality of rows, and the sealing property is improved by providing a step on the contact surface between the second spacer 27 and the cylindrical member 30. You may do it. In the case where a plurality of rows of groove portions are provided, it is preferable to provide a binding band for each groove portion or to provide a wide binding band that can cover the entire plurality of rows of groove portions.

  Furthermore, in the said embodiment, since the cylindrical member 30 is formed with the material which can visually recognize an inside, it can confirm the oil leakage inside, but it prevents the connection part of a hydraulic hose connection part structure from loosening When it is desired to ensure only the effect, the cylindrical member may have a structure in which the inside cannot be visually recognized.

  Moreover, although the said embodiment demonstrated and demonstrated the case where the hydraulic hose 20 was connected to the hydraulic cylinder 10 for opening and closing the opening / closing wing 2, the apparatus which the hydraulic cylinder 10 act | operates is limited to the opening / closing wing 2 Is not to be done. For example, in the hydraulic hose connection part structure 1, the hydraulic hose is connected to a hydraulic cylinder that operates a device having a movable part such as a tailgate provided at the rear end of a cargo compartment or an attached crane installed in a transport vehicle. Is.

DESCRIPTION OF SYMBOLS 1 Hydraulic hose connection part structure 1a Hydraulic hose connection part structure 10 Hydraulic cylinder 11 Elbow pipe (member to be connected)
13 Screw part 14 Nut part 17 First spacer 20 Hydraulic hose 21 Base 27 Second spacer 28 Slit 28a Slit 30 Cylindrical member 31 First binding means 32 Second binding means 40 Nut 41 Washer 50 Adapter (member to be connected)
53 Screw part

Claims (6)

In the hydraulic hose connection part structure for connecting the hydraulic hose provided in the transport vehicle and the connected member provided with the screw part,
An annular first spacer that contacts an end face of a base provided at an end of the hydraulic hose and surrounds the screw portion, an annular second spacer that surrounds the hydraulic hose, and the first spacer to the second spacer A cylindrical member extending and having one end portion surrounding the first spacer and the other end portion surrounding the second spacer; first bundling means for fastening the cylindrical member to the first spacer; and the cylindrical shape A hydraulic hose connection part structure comprising: a second bundling means for fastening the member to the second spacer. The inner peripheral surface of the first spacer is in close contact with the outer peripheral surface of the screw portion, and the outer peripheral surface of the first spacer is in close contact with the inner peripheral surface of the cylindrical member,
The inner peripheral surface of the second spacer is in close contact with the outer peripheral surface of the hydraulic hose, and the outer peripheral surface of the second spacer is in close contact with the inner peripheral surface of the cylindrical member. The hydraulic hose connection structure described. The hydraulic hose connection part structure according to claim 1 or 2, wherein the cylindrical member is made of a translucent material.
The hydraulic hose connection part structure according to any one of claims 1 to 3, wherein a slit extending from an inner peripheral surface to an outer peripheral surface is formed in the second spacer. The screw part is provided with a nut,
The hydraulic hose connection part structure according to any one of claims 1 to 4, wherein the first spacer is sandwiched between a tip part of the base and the nut. A step portion is formed at a base end portion of the screw portion, and a washer surrounding the screw portion is attached to the step portion,
The hydraulic hose connection part structure according to any one of claims 1 to 4, wherein the first spacer is sandwiched between a tip part of the base and the washer.

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