JP6349233B2 - How to put a spring on a fitting with a jig and hose - Google Patents

Description

  The present invention relates to a jig for mounting a spring on a joint with a hose, and a method for mounting a spring on a joint with a hose using the jig.

  Patent Document 1 below discloses a hose protector provided with a fastening tool that is crimped and fixed to the outer peripheral surface of the hose at both ends of a spring coil (spring) for surrounding the outer peripheral surface of the soft hose. This hose protector is positioned at the place where it is planned to bend when the hose is piped, and the spring coil is attached to the expected place of the hose by tightening and crimping the annular band of the fastening tool at both ends to the outer peripheral surface of the hose. Can be fixed.

JP 2005-121125 A

  By the way, in a joint with a hose (hose assembly) in which the hose is swaged and fixed by the swaged portion of the joint, the bending of the hose is relaxed near the swaged portion of the joint, and damage to the hose is reduced. Protection is desired. For this reason, at work sites and the like, a spring is externally mounted (attached) on the outside of the connection portion between the caulking portion of the joint and the hose or over the entire length of the hose including these.

  In the above-mentioned patent document 1, one end of a hose is fitted to a pipe joint, and a hose is connected to a connection part in which the fitting part of the hose is fastened to the outer peripheral surface of the pipe joint by a screw-type hose clamp from the outside of the fitting part. Wearing protective equipment. At that time, the worm of the fastening tool attached to one end of the spring coil is twisted in one direction to gradually reduce the inner diameter of the annular band portion, and is crimped to the outer peripheral surface of the hose fitted to the pipe joint. The worm of the fastening tool attached to the other end of the spring coil is twisted in one direction to gradually reduce the inner diameter of the annular band portion, and is crimped to the outer peripheral surface of the hose, so that the spring is placed at a predetermined position of the hose. The coil is fixed. For this reason, the operation | work when fixing a spring coil to the connection part of a pipe joint and a hose is complicated, and labor and time are required for an attachment operation | work.

  Moreover, since the hose protector of patent document 1 has tied the fastening tool on the both ends of a spring coil, it leads to the cost increase of a hose protector.

  The present invention has been made in view of the above problems, and a jig capable of easily mounting a spring on the outside of a connection portion between a crimped portion of a joint and a hose without changing the specification of the spring. And it aims at providing the method of armoring a spring to a joint with a hose.

  In order to solve the above problems, the jig according to the invention described in claim 1 is a jig for armoring a spring to a joint with a hose that is secured by crimping a hose by a crimping portion provided on the joint. A conical cylindrical plate portion having a slit formed along the axial direction and having an outer diameter gradually reduced toward the distal end portion in the axial direction. It is comprised so that the front-end | tip part of the said board part may contact or adjoin to the outer peripheral surface of the said hose in the state inserted in the inside.

  According to the first aspect of the present invention, the jig includes the conical cylindrical plate portion whose outer diameter is gradually reduced toward the tip portion in the axial direction, and the plate portion includes the axial direction. A slit is formed along. When mounting a spring on a joint with a hose, with the joint with a hose inserted in the inside of the plate part, the tip of the plate part is brought into contact with or close to the outer peripheral surface of the hose so that the plate can be seen from the hose side. It becomes easy to push the spring along the outer peripheral surface of the portion. At that time, the slit is formed along the axial direction in the plate portion, so that when the spring is pushed in, the plate portion is easily squeezed and deformed along the shape of the crimped portion of the joint. A spring can be externally attached to the connecting portion of the first through the plate portion. Furthermore, with the jig (plate part) fixed, the joint with the hose and the spring can be pulled out from the slit of the jig as a single unit so that the spring can be easily packaged (attached) to the joint and hose connection. Can do.

  According to a second aspect of the present invention, in the jig according to the first aspect, the slit is formed so as to divide the plate portion along the axial direction.

  According to the invention described in claim 2, the slit divides the plate portion along the axial direction, and when the spring is pushed in from the hose side along the outer peripheral surface of the plate portion, the plate portion is connected to the joint. The squeezing deformation can be more reliably performed along the shape of the caulking portion.

  According to a third aspect of the present invention, in the jig according to the first or second aspect, the slit has a distal end portion in the axial direction rather than a circumferential width on the distal end side in the axial direction of the plate portion. The opposite circumferential width is formed large.

  According to the invention described in claim 3, the slit is formed such that the circumferential width on the opposite side of the axial tip portion is larger than the circumferential width on the axial tip portion side of the plate portion, Since the joint can be seen from the slit when the joint is inserted into the plate portion, the position of the joint can be confirmed. In addition, by increasing the circumferential width of the slit on the side where the outer diameter on the side opposite to the tip of the plate portion is large, when pushing the spring along the outer peripheral surface of the plate portion from the hose side, the plate portion is It is possible to further squeeze and deform along the shape of the caulking portion of the joint.

  According to a fourth aspect of the present invention, in the jig according to any one of the first to third aspects, the plate portion is fixed to the side opposite to the tip portion in the axial direction of the plate portion. A grip is provided.

  According to the invention described in claim 4, the grip portion for fixing the plate portion is provided on the side opposite to the tip portion in the axial direction of the plate portion, and the plate portion is fixed by the grip portion, The hose and the spring can be pulled out from the jig as a unit.

  The invention according to claim 5 is the jig according to any one of claims 1 to 4, wherein the plate portion is formed of a thin steel plate.

  According to the invention described in claim 5, since the plate portion is formed of a thin steel plate, the durability of the plate portion can be improved even when the thickness of the plate portion is reduced.

  The invention according to claim 6 is a method of mounting a spring on a joint with a hose using the jig according to any one of claims 1 to 5, wherein the joint is attached to the jig. And the step of bringing the tip of the plate into contact with or close to the outer peripheral surface of the hose, and fixing the portion opposite to the tip of the plate in the axial direction A state in which the spring is pushed from the hose side along the outer peripheral surface of the plate portion, and the plate portion is squeezed and deformed along the shape of the caulking portion of the joint; and the axial direction of the plate portion A step of bending the hose together with the spring in a state where the portion opposite to the distal end portion is fixed, and pulling the hose and the spring together from the slit of the jig.

  According to the sixth aspect of the present invention, the joint is inserted into the conical cylindrical plate portion constituting the jig, and the tip portion of the plate portion is brought into contact with or close to the outer peripheral surface of the hose. Further, the spring is pushed in from the hose side along the outer peripheral surface of the plate portion in a state where the portion of the plate portion opposite to the tip portion in the axial direction is fixed. Accordingly, the plate portion is squeezed and deformed along the shape of the caulking portion of the joint, and the spring can be externally attached to the connection portion between the joint and the hose via the plate portion. Then, the hose is bent together with the spring in a state where the portion of the plate portion on the opposite side to the tip portion in the axial direction is fixed, and the hose and the spring are integrally pulled out from the slit of the jig. As a result, the joint with the hose and the jig (plate part) are separated, and the spring is externally mounted (attached) to the connection portion between the joint and the hose. In this method, by using a jig, a spring can be easily packaged on the outer side of the connection portion between the joint and the hose.

  According to the method for mounting a spring on a jig and a joint with a hose according to the present invention, the spring can be easily mounted on the outside of the connection portion between the crimped portion of the joint and the hose without changing the specifications of the spring. Can do.

FIG. 1 is a side view showing a process of mounting a spring on a joint with a hose using the jig according to the first embodiment of the present invention, and a state in which the joint with a hose is inserted inside the jig. FIG. 2 is a perspective view showing a jig according to the first embodiment of the present invention. FIG. 3 is a side view showing a step of mounting a spring on a joint with a hose, and a part showing a state in which the spring is pushed through a jig to the outside of a connection portion between the hose and the joint shown in FIG. is there. FIG. 4 is a side view showing a state in which the jig shown in FIG. 1 is separated and a spring is sheathed on a joint with a hose. FIG. 5: is a side view which shows the state which inserted the coupling with a hose inside the jig | tool which concerns on 2nd Embodiment of this invention. 6A is a side view showing a process of mounting a spring on a joint with a hose according to a comparative example, and FIG. 6B is a side view showing a state in which the spring is mounted on a joint with a hose according to a comparative example. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing a state in which a joint 20 with a hose is inserted inside the jig 10 according to the first embodiment of the present invention. As shown in FIG. 1, the joint 20 with a hose is a joint with a hose (hose assembly product) including a joint 22 and a hose 24 fixed by a caulking portion 30 of the joint 22.

  The joint 22 includes a metal joint body 28 having a core portion (not shown) into which the inner side of the end of the hose 24 is inserted on one end side in the axial direction, and a core portion (not shown) of the joint body 28. And a metal caulking portion (clamp) 30 that extends along the hose 24 and is disposed outside the hose 24. The joint body 28 is formed in a substantially cylindrical shape, and a flow path through which a fluid (for example, a liquid) passes is formed.

  The caulking portion 30 includes a cylindrical portion 30A for caulking and fixing the hose 24 and an enlarged diameter portion 30B formed at the distal end portion of the cylindrical portion 30A. The enlarged diameter portion 30B is configured such that the inner diameter and the outer diameter are expanded toward the distal end side than the cylindrical portion 30A in order to facilitate the insertion of the hose 24 into the crimping portion 30. The caulking portion 30 includes a protruding portion 30C that is formed on the base side of the cylindrical portion 30A and protrudes outward in the radial direction. A protrusion (not shown) that protrudes radially outward is provided on the axially intermediate portion side of the joint body 28, and the protrusion 30 </ b> C of the caulking portion 30 is engaged with the protrusion of the joint body 28. The caulking portion 30 is attached to the joint main body 28.

  In the joint 20 with a hose, the hose 24 is pressed and fixed to the core portion of the joint body 28 by the crimping portion 30 being crimped from the outside while the hose 24 is inserted inside the crimping portion 30. ing.

  A large-diameter portion 28 </ b> A that protrudes outward in the radial direction is provided at an intermediate portion in the axial direction of the joint body 28. A nut 32 for connecting the joint 22 to another pipe is rotatably attached to the other end portion side (the side opposite to the caulking portion 30) of the joint body 28 in the axial direction. The outer diameter of the large-diameter portion 28A is formed in a substantially hexagonal shape when viewed in the axial direction, and can be fixed with a spanner when other pipes are tightened with the nut 32. The nut 32 also has a substantially hexagonal outer shape when viewed in the axial direction. The shape of the joint is not limited to that shown in the figure, and the same effect can be obtained for flanges, male threads, and other shapes.

  As shown in FIG. 1, a joint with a hose (hose assembly product) 20 is inserted into a jig 10 for sheathing a coil spring 36 as a spring at a connection portion between a hose 24 and a joint 22. Yes. The coil spring 36 is sheathed on the outer side of the connection portion between the crimping portion 30 of the joint 22 and the hose 24 (see FIG. 4), thereby relaxing the bending of the hose 24 near the crimping portion 30 of the joint 22. It functions as a protective material for reducing damage to the hose 24 and protecting the wound.

  As shown in FIG. 2, the jig 10 includes a thin plate portion 12 as a plate portion formed in a substantially conical cylinder shape by a thin plate material. The outer diameter and inner diameter of the thin plate portion 12 are gradually reduced (reduced) from the one end portion 12A in the axial direction toward the tip portion 12B in the axial direction. In the present embodiment, the thin plate portion 12 is formed of a thin steel plate (thin steel plate), and a material considering durability is selected. As a result, the shape of the thin plate portion 12 having a substantially conical cylindrical shape is maintained.

  The edge of the distal end portion 12B of the thin plate portion 12 has a predetermined inner diameter, and is formed slightly larger than the outer diameter of the hose 24. As a result, as shown in FIG. 1, the edge of the distal end portion 12 </ b> B of the thin plate portion 12 contacts or approaches the outer peripheral surface of the hose 24 in a state where the joint 20 with a hose is inserted into the jig 10. It is like that.

  As shown in FIG. 2, a slit 14 is formed in the thin plate portion 12 along the axial direction. In the present embodiment, the slit 14 is formed so as to divide the thin plate portion 12 along the axial direction. The slit 14 is formed so that the circumferential width on the one end portion 12 </ b> A side in the axial direction is larger than the circumferential width on the distal end portion 12 </ b> B side in the axial direction of the thin plate portion 12. More specifically, the slit 14 is a small slit portion 14A having a small circumferential width on the tip portion 12B side having a small outer diameter of the thin plate portion 12, and one end portion 12A having a large outer diameter of the thin plate portion 12. On the side, the large slit portion 14B has a large circumferential width. The slit 14 includes an inclined slit portion 14C in which the circumferential width is gradually increased from the small slit portion 14A toward the large slit portion 14B at the intermediate portion in the axial direction of the thin plate portion 12.

  In the present embodiment, in the side view shown in FIG. 1, the circumferential width of the large slit portion 14 </ b> B of the slit 14 is set to be larger than the outer diameter of the large diameter portion 28 </ b> A of the joint 22. By providing the thin plate portion 12 with the slit 14 along the axial direction, the thin plate portion 12 is added to the joint 22 when the coil spring 36 is pushed in from the hose 24 side along the outer peripheral surface of the thin plate portion 12. It is configured to be easily deformed by narrowing along the shape of the tightening portion 30 (see FIG. 3).

  Next, the operation and effect of the jig 10 according to the present embodiment, and a method of mounting the coil spring 36 on the joint 20 with the hose using the jig 10 will be described.

  As shown in FIG. 1, a joint 22 of a joint 20 with a hose is inserted into a thin plate portion 12 having a substantially conical cylindrical shape that constitutes the jig 10. At that time, the joint 20 with the hose is inserted into the jig 10 until the joint 22 becomes invisible, and the edge of the distal end portion 12B of the thin plate portion 12 is brought into contact with or close to the outer peripheral surface of the hose 24. In the present embodiment, the joint body 28 is inserted into the large slit portion 14 </ b> B, and the crimping portion 30 is inserted into the thin plate portion 12 along the slit 14. The position of the joint 22 can be visually confirmed from the slit 14 of the thin plate portion 12. In this state, the coil spring 36 is inserted outside the outer peripheral surface of the hose 24. Further, one end portion 12 </ b> A of the thin plate portion 12 is fixed to the fixing portion 40.

  Next, as shown in FIG. 3, with the one end 12A of the thin plate portion 12 fixed, the coil spring 36 is pushed into the outer peripheral surface side of the substantially conical cylindrical thin plate portion 12 from the hose 24 side. Or roll up). Thereby, the thin plate portion 12 is squeezed and deformed along the shape of the crimping portion 30 of the joint 22 as the coil spring 36 is pushed. At this time, if the joint 22 is held with a free hand and the coil spring 36 is pushed in, the side on which the coil spring 36 is inserted (including the hose 24) does not move, and the coil spring 36 is easily pushed into the correct position. More specifically, in FIG. 3, if the joint 22 is pushed rightward in the drawing and the coil spring 36 is pushed leftward in the drawing, the hose 24 becomes difficult to escape.

  The caulking portion 30 is provided with a diameter-expanded portion 30B on the tip end side (the hose 24 side) in the axial direction, and a protrusion 30C is provided on the intermediate portion side in the axial direction of the joint body 28. For this reason, in the state where the jig 10 is not present, it is difficult for the coil spring 36 to interfere with the enlarged diameter portion 30B and the protruding portion 30C and to push in the coil spring 36. In the present embodiment, the coil spring 36 is pushed in along the outer peripheral surface of the thin plate portion 12 disposed substantially outside the caulking portion 30, so that the coil spring 36 is pushed in along the outer peripheral surface of the thin plate portion 12. The thin plate portion 12 is squeezed and deformed along the shape of the caulking portion 30 as well. Then, it is confirmed that the coil spring 36 has entered a predetermined position of the joint 22 of the joint 20 with a hose (in this embodiment, a position covering the protruding portion 30C).

  Thereafter, with the one end 12A of the thin plate portion 12 fixed, the hose 24 of the joint 20 with the hose is slightly bent together with the coil spring 36, so that the hose 24 and the coil spring 36 are integrated together from the slit 14 of the jig 10. Pull out. At that time, if the hose 24 and the coil spring 36 of the joint 20 with hose are pulled out without bending, only the coil spring 36 may be pulled out quickly, and the coil spring 36 may be displaced from a predetermined position of the joint 22. For this reason, by bending the hose 24 of the joint 20 with the hose together with the coil spring 36, the hose 24 and the coil spring 36 are integrated, and the hose 24 and the coil spring 36 are pulled out from the jig 10 without being relatively displaced. Is possible. For example, the contact area between the thin wall portion 12 and the hose 24 is reduced by bending the hose 24 of the joint 20 with a hose together with the coil spring 36 toward the slit 14, and the coil spring 36 is not displaced from a predetermined position of the joint 22. Can be.

  Thereby, as shown in FIG. 4, the joint 20 with the hose and the jig 10 (see FIG. 3) are separated, and the coil spring 36 is externally attached to the connecting portion between the joint 22 and the hose 24 (see FIG. 3) (see FIG. 3). Attached). In this method, by using the jig 10, the coil spring 36 can be easily packaged outside the connecting portion between the joint 22 and the hose 24 via the jig 10. Then, with the jig 10 fixed, the hose joint 20 and the coil spring 36 are integrally pulled out of the slit 14 of the jig 10, so that the coil spring 36 is externally attached to the connection portion between the joint 22 and the hose 24 ( Wearing). For this reason, without changing the specification of the coil spring 36, the coil spring 36 can be easily packaged outside the connection portion between the crimping portion 30 of the joint 22 and the hose 22.

  In such a jig 10, the slit 14 is formed so as to divide the thin plate portion 12 along the axial direction. As a result, when the coil spring 36 is pushed (inserted) along the outer peripheral surface of the thin plate portion 12 from the hose 24 side, the thin plate portion 12 can be squeezed and deformed along the shape of the crimping portion 30 of the joint 22. it can.

  Further, the slit 14 is formed such that the circumferential width on the one end portion 12 </ b> A side in the axial direction is larger than the circumferential width on the distal end portion 12 </ b> B side in the axial direction of the thin plate portion 12. When inserted in the interior, the position of the joint 22 can be confirmed from the slit 14. In addition, the width of the slit 14 (circumferential width) is increased on the one end portion 12A side of the thin plate portion 12, and the width of the slit 14 (circumferential width) is decreased on the distal end portion 12B side of the thin plate portion 12. As a result, when the coil spring 36 is pushed (inserted) along the outer peripheral surface of the thin plate portion 12 from the hose 24 side, the thin plate portion 12 is more reliably squeezed and deformed along the shape of the crimping portion 30 of the joint 22. be able to.

  Further, by forming the thin plate portion 12 with a thin steel plate, even when the thickness of the thin plate portion 12 is reduced, the durability of the thin plate portion 12 can be improved.

  FIG. 6 shows a method of mounting the coil spring 36 on the joint 20 with a hose of the comparative example.

  As shown in FIG. 6A, in the comparative example, the coil spring 36 is directly sheathed from the hose 24 side of the joint 20 with the hose. That is, the jig 10 of this embodiment is not provided outside the joint 20 with a hose.

  In this method, when the coil spring 36 is externally mounted on the outer side of the connection portion between the crimping portion 30 and the hose 24 of the joint 22, the coil spring 36 is expanded by twisting the coil spring 36 in the diameter expansion direction indicated by the arrow A. Then, the coil spring 36 is pushed over the enlarged diameter portion 30 </ b> B and the protruding portion 30 </ b> C of the joint 22 and pushed into the connection portion between the crimping portion 30 and the hose 24. The coil spring 36 is set so that the diameter of the coil spring 36 is small so that the fitting is tight when the joint 22 is attached to the connecting portion between the crimping portion 30 and the hose 24 with the prevention of disengagement during use. There are many cases. For this reason, a large amount of labor and time are required for the installation work of the coil spring 36. In particular, when the coil spring 36 is attached to the connection portion between the joint 22 and the hose 24 of the joint 20 with the hose at a plurality of locations, even a skilled worker has a great effort and time.

  In contrast, in this embodiment, the jig 10 is used, and the joint 22 of the joint 20 with the hose is inserted into the jig 10 so that the coil spring 36 is provided outside the connection portion between the joint 22 and the hose 24. Can be easily packaged. Then, with the jig 10 fixed, the joint 20 with the hose and the coil spring 36 are pulled out from the slit 14 of the jig 10 as a unit, so that the coil spring 36 can be easily attached to the connection portion between the joint 22 and the hose 24. It can be externally mounted.

  Next, a jig according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 5, the jig 50 includes a thin plate portion 12 formed in a substantially conical cylindrical shape by a thin plate material, and the thin plate portion 12 extends from an axial end portion 12A to an axial tip portion 12B. The outer diameter is gradually reduced toward. A plate-like attachment portion 52 is joined to one end portion 12A of the thin plate portion 12. In the present embodiment, almost the entire circumferential direction of the one end portion 12 </ b> A of the thin plate portion 12 is joined to the attachment portion 52. A grip band 54 as a substantially U-shaped grip portion in a side view is fixed to the surface of the attachment portion 52 opposite to the thin plate portion 12.

  In such a jig 50, the coil spring 36 is moved along the outer peripheral surface of the thin plate portion 12 disposed outside the joint 22 of the joint 20 with the hose in a state where the grip band 54 is gripped and the jig 50 is fixed. You can push in (push in). Further, the joint 20 with the hose and the coil spring 36 can be integrally pulled out from the slit 14 of the jig 50 with the grip band 54 held and the jig 50 fixed. For this reason, it is not necessary to fix the jig 50 by providing a member different from the jig 50.

  In the first embodiment, the coil spring 36 is pushed in (inserted) up to the projecting portion 30C of the caulking portion 30, but is not limited to this. Depending on the shape of the protruding portion of the caulking portion, the coil spring 36 may not be pushed into the protruding portion, or the coil spring 36 may not need to be pushed into the protruding portion.

  In the second embodiment, the jig 50 is provided with the substantially U-shaped grip band 54. However, the present invention is not limited to this, and any other shape can be used as long as the jig can be fixed. You may provide the grip part of the shape.

10 Jig 12 Thin plate part (plate part)
12B tip part 14 slit 14A small slit part (width in the circumferential direction is small)
14B Large slit (large circumferential width)
20 Joint 22 with hose Joint 24 Hose 30 Clamping section 32 Nut 36 Coil spring (spring)
50 Jig 54 Grip band (grip part)

Claims (6)

A jig for armoring a spring to a joint with a hose fixed by tightening a hose with a crimping portion provided on the joint,
A slit is formed along the axial direction, and a conical cylindrical plate portion whose outer diameter is gradually reduced toward the distal end portion in the axial direction,
The jig comprised so that the front-end | tip part of the said board part may contact or adjoin the outer peripheral surface of the said hose in the state which inserted the said coupling in the inside of the said board part.   The jig according to claim 1, wherein the slit is formed so as to divide the plate portion along an axial direction.   The said slit is formed in the circumferential direction width | variety on the opposite side to the front-end | tip part of an axial direction larger than the circumferential width | variety by the side of the front-end | tip part of the axial direction of the said board part. jig.   The jig according to any one of claims 1 to 3, wherein a grip portion for fixing the plate portion is provided on a side opposite to the tip portion in the axial direction of the plate portion.   The jig according to any one of claims 1 to 4, wherein the plate portion is formed of a thin steel plate. A method for armoring a spring to a joint with a hose using the jig according to any one of claims 1 to 5,
Inserting the joint into the plate portion constituting the jig and bringing the tip portion of the plate portion into contact with or close to the outer peripheral surface of the hose;
In a state where the portion of the plate portion opposite to the tip portion in the axial direction is fixed, the spring is pushed in from the hose side along the outer peripheral surface of the plate portion, and the plate portion is connected to the caulking portion of the joint. A process of squeezing and deforming along the shape of
Bending the hose together with the spring with the portion opposite to the axial tip of the plate portion fixed, and pulling the hose and the spring together from the slit of the jig;
A method of mounting a spring on a joint with a hose having

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