JP2008215602A - Hose connection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform a temporary fixing operation for fixing a hose to a pipe. <P>SOLUTION: A hose clamp HC held by a holder HO in a diameter-expanded state is incorporated in a cylindrically formed supporter in such a state that is locked by a lock device 11. Retaining walls bf, br project from the outer peripheral surface of a pipe P. The sets of retaining walls displaced to the front and rear in the axial direction are disposed in such a state that their phases are displaced in the circumferential direction. Walls to be retained 32 extend from the bottom part of the pipe P insertion hole of the supporter along the circumferential direction. After the pipe P is inserted and the front holding wall bf is extended through the cutout part 33 of the wall to be retained 32, the pipe P is rotated relative to the supporter S1. Then, the wall to be retained 32 is retained by the front and rear retaining walls and positioned in the axial direction. Also, the rear retaining wall br rides over a tilted surface 36 according to the rotation, and retained between itself and a stopper projecting part 34 from the female/male direction. As a result, the supporter S1 is also positioned on the pipe P in the circumferential direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hose connection device.

Conventionally, the thing of the following patent document 1 is known as this kind of hose connection apparatus. This is a hose clamp that has been held in an expanded state in a plastic supporter (positioning tool) and integrated into the hose side in a loose fit before connection to the pipe. And temporarily attached. The supporter is provided with positioning means for each of the axial direction and the circumferential direction with respect to the hose so that the hose clamp accommodated therein can be held in a fixed posture.
JP 2000-249274 A

  By the way, when the hose and the pipe are tightened by the hose clamp, the tightening position is preferably immediately after the bulge portion. This is because the bulge part is caught and the hose clamp is prevented from coming off. The position where the bulge part is provided is not limited to that provided at the mouth of the pipe as in the above document, but may be located slightly behind the mouth, but in any case when inserting the hose into the pipe For this, it is necessary to insert the hose clamp in the temporarily attached state to a depth that passes through the bulge portion. Therefore, the hose has to be inserted beyond the protruding portion of the bulge portion, which is a heavy burden on the operator. At that time, the supporter may be expanded in the same manner, and if the corresponding resistance is added, the burden on the worker is further increased.

  This invention is completed based on the above situations, Comprising: It aims at provision of the hose connection apparatus which can perform the connection operation | work of a hose and piping smoothly.

As means for achieving the above-mentioned object, the invention of claim 1 is a hose connection device for connecting a hose to a pipe, which is formed by turning in a ring shape and can always be inserted through the hose. A hose clamp that is held in an expanded state, but can be tightened by moving to a reduced diameter state by its own spring force by releasing the expanded state,
A housing part that can house the hose clamp in a retaining state is provided inside, and a hose insertion part into which the hose can be inserted is opened at one end side, and the pipe can be inserted into the other end side. A supporter having an insertion portion opened and provided in the pipe insertion portion, and protruding from the outer peripheral surface of the pipe when the pipe is inserted into the pipe insertion portion from the axial direction and relatively rotated around the axis. A holding portion that holds the supporter together with the hose clamp and holds the supporter with respect to the pipe is provided to be engaged with the formed bulge portion.

  The invention according to claim 2 is the one according to claim 1, wherein both ends of the hose clamp are erected outward in the radial direction, and the holding means is formed integrally with or separately from the hose clamp. The expanded diameter state is maintained by holding both ends of the hose clamp close to each other. On the other hand, the supporter is formed in a cylindrical shape that opens to both ends in the axial direction. The hose clamp in the expanded state can be assembled through the opening on one side of the support, whereby the outer peripheral surface of the supporter is a continuous surface along the circumferential direction.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the bulge portion has a sandwiching wall that stands up and down in the axial direction of the pipe, while the pipe insertion in the supporter. A sandwiched wall is formed to project along the circumferential direction on the inner peripheral surface of the part, and a notch is formed on the sandwiched wall to allow passage of the sandwiched wall located on the front side in the insertion direction. After the front holding wall located on the front side in the insertion direction passes through the notch, the clamped surface is clamped between the front and rear clamping walls when the pipe is rotated relative to the supporter. It is characterized by that.

  According to a fourth aspect of the present invention, the holding wall according to the third aspect is provided with a plurality of the holding walls that are displaced by a predetermined interval before and after the pipe in the axial direction, and each of the holding walls on the front side. The rear holding wall is characterized in that the phase is shifted so as not to overlap in the circumferential direction.

  Invention of Claim 5 is the thing of Claim 3 or Claim 4, It is an inner peripheral surface of the said piping insertion part, Comprising: The front side which passed the said notch part in the said insertion direction front side from the said notch part This is characterized in that an abutting stop portion for projecting the front end of the holding wall is projected.

  The invention according to claim 6 is the one according to any one of claims 3 to 5, wherein it is an inner peripheral surface of the pipe insertion portion in the supporter, and is at least one of the inner and outer sides of the sandwiched wall. When the pipe is rotated relative to the supporter, the supporter is placed in the circumferential direction with respect to the pipe by sandwiching the front holding wall and / or the rear holding wall in the circumferential direction. A positioning part is provided for positioning with respect to the front side holding wall or the rear side holding wall, and has a stopper projection on the front side in the rotation direction, and the front side holding wall or the rear side in the rotation direction. An inclined surface that can be detented by overcoming the rear holding wall is formed.

  The invention according to claim 7 is the one according to claim 1 or 2, wherein a plurality of the bulge portions are arranged on the same circumference on the outer peripheral surface of the pipe, while the pipe insertion portion of the supporter At the opening edge of the flange, a flange edge projects inwardly, and a recess that can pass through each bulge part is cut out at a position corresponding to the bulge part in the flange edge. A ring-shaped retainer is arranged on the inner peripheral surface and at a depth from the flange edge at a predetermined distance from the flange edge, and when the bulge part passes through the recess, It is assembled in a state in which it can be stopped and elastic displacement in the axial direction is allowed, and further, a positioning recess is provided on the inner surface of the flange edge so that the bulge portion can be sandwiched from the circumferential direction, Each bulge is in the recess After the passage, when the pipe is relatively rotated with respect to the supporter, a rising surface is formed on the side facing the bulge portion in the positioning recess so as to rise upward along the forward direction of the bulge portion. In the process in which the bulge part rides on the riding surface, the retainer is elastically displaced to the back. When the bulge part gets over the riding surface, the bulge part is moved into the positioning recess by the elastic reaction force of the retainer. The pipe is positioned with respect to the supporter in the circumferential direction by being pressed into the supporter.

  According to an eighth aspect of the present invention, in the seventh aspect of the present invention, a portion of the retainer corresponding to the recess serves as a fixing portion that is attached to the supporter, and other regions are non-supported with respect to the supporter. It is a restraint movable part.

<Invention of Claim 1>
According to the first aspect of the present invention, the connection between the hose and the pipe is made as follows. First, the hose clamp is accommodated in the supporter while maintaining the expanded diameter. Next, when one end of the pipe is inserted in the pipe insertion part along the axial direction, and then the pipe is relatively rotated around the axis, the bulge part of the pipe is locked to the holding part formed in the pipe insertion part. Thus, the supporter is held against the pipe. Thereafter, the hose is fitted into the end of the pipe while passing through the inside of the hose clamp in an expanded state. And if the diameter expansion state of a hose clamp is finally cancelled | released, a hose clamp will transfer to a diameter reduction state, the connection site | part of a hose and piping will be tightened, and a hose and piping will be connected.

Thus, according to the first aspect of the present invention, it is not necessary to insert the hose to a depth that passes through the bulge portion with respect to the pipe as in the prior art, and it is sufficient to insert the hose to the near depth.
Even in this case, the hose clamp can be reliably prevented from coming off the hose because the movement in the axial direction is strongly restricted by the engagement between the supporter and the bulge portion of the pipe. In addition, when the supporter is attached to the pipe, only the turning operation after insertion is required, so that the workability is excellent.

<Invention of Claim 2>
According to the invention of claim 2, the hose clamp is incorporated into the supporter from one end side thereof. That is, when a hose clamp is accommodated in the supporter, it is possible to adopt a two-part configuration in which the supporter is divided in half, and to incorporate the hose clamp inside from the radial direction. Since the site | part which connects the made supporters is exposed outside, there exists a possibility that the site | part may be damaged with a jumping stone. However, according to the second aspect of the present invention, since the outer peripheral surface can be a continuous surface without halving the supporter, the supporter can be structured to be less susceptible to damage by a jumping stone or the like.

<Invention of Claim 3>
According to the invention of claim 3, when the pipe is inserted into the supporter, the front holding wall is rotated relative to the supporter after the front holding wall is passed through the notch, thereby allowing the front holding wall to rotate. Since the wrap around the back side of the sandwiched wall, the sandwiched wall is sandwiched between the front and rear sandwiching walls. Thus, the supporter is attached to the pipe in a state in which the movement is restricted in the axial front-rear direction.

<Invention of Claim 4>
Although it is possible to sandwich the sandwiched wall with the sandwiching wall having the same phase, the distance between the front and rear sandwiching walls is a narrow space equivalent to the thickness of the sandwiched wall. Therefore, it may be difficult to manufacture the front and rear holding walls. However, if the phase in the circumferential direction is shifted as in the fourth aspect of the invention, the holding walls are separated from each other, which makes it easier to manufacture.

<Invention of Claim 5>
According to the fifth aspect of the present invention, when the pipe is inserted into the supporter, the front holding wall comes into contact with the stopper and positioning is performed in the axial direction, so that the subsequent rotation operation can be performed smoothly.

<Invention of Claim 6>
According to the sixth aspect of the present invention, when the supporter is rotated relative to the pipe, the front or / and the rear holding wall is sandwiched from the circumferential direction by the positioning portion, so the circumferential direction between the supporter and the pipe. Positioning can be performed. For this reason, since the hose clamp accommodated in the supporter is also positioned in the circumferential direction at the same time, it becomes easy to cancel the diameter expansion.

<Invention of Claim 7>
According to the invention of claim 7, when the pipe and the supporter are relatively rotated, the bulge portion climbs along the inclination of the riding surface and bends the retainer to the back. Therefore, when the bulge part gets over the riding surface, the bulge part is pushed into the positioning recess by the elastic reaction force of the retainer, and thus the pipe and the supporter, and thus the expanded diameter hose clamp accommodated here, are circumferential. And positioned with respect to the axial direction.

<Invention of Claim 8>
According to the invention of claim 8, since the retainer is a fixed portion with respect to the supporter where the bulge portion that has passed through the recess is abutted, the bulge portion can be reliably stopped in front. On the other hand, since the other region is a movable portion that is not attached to the supporter, it is effective in obtaining a good flexibility and exerting a push-back operation on the bulge portion.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the hose connection device J of the present embodiment is for connecting a hose H to a metal pipe P. The hose H is formed of a flexible material such as a rubber material, and the pipe P is formed of a pipe that can be fitted inside the hose H. On the outer peripheral surface of the pipe P, bulge portions bf and br are projected near the end by brazing or the like. The bulge part is composed of four sandwiching walls bf and br each formed in a plate shape. These are two sets that are 180 degrees apart in the circumferential direction, and each set is arranged at a predetermined interval in the axial direction. Further, the front and rear groups are arranged 90 degrees out of phase in the circumferential direction.

  The hose connection device J of this embodiment includes a hose clamp HC and a supporter S1 that accommodates the hose clamp HC. First, the hose clamp HC will be described. The hose clamp HC is formed of a metal strip spring material, one end side is formed with a long hole portion 1 over a predetermined length range, and the other end side is a narrow portion. 2 And the clip main body 3 is formed by turning the whole into an annular shape while fitting a part of the narrow portion 2 into the long hole portion 1. Further, both end portions of the long hole portion 1 and the narrow portion 2 are erected at substantially the same height outward in the radial direction to form first and second knobs 4 and 5. The first knob 4 has an end portion of the narrow portion 2 that is expanded in a square shape to form a locking plate 6. The locking plate 6 is provided with a narrow lock hole 8 and a wide release hole 9 in the vertical direction so as to be engaged and disengaged with an engaging portion 7 of the holder HO described later, and communicate with each other. It is formed so as to penetrate through.

  Thus, the hose clamp HC can be held in a state in which the first and second knobs 4 and 5 are close to each other by the holder HO, in which case the inner diameter of the clip body 3 is sufficiently larger than the outer diameter of the pipe P and the hose H. The diameter is large and can be loosely inserted into these. On the other hand, when the holder HO is unlocked and the first and second knobs 4 and 5 are separated from each other, the clip body 3 is in a reduced diameter state in which the connection portion between the hose and the pipe P can be tightened. It has become.

Next, the supporter S1 will be described. In this embodiment, the supporter S1 includes a supporter body 10 and a retainer 11 that prevents the clip body 3 from coming off.
The supporter body 10 is integrally formed of a synthetic resin material. The entire supporter body 10 has a stepped cylindrical shape and is formed of a single member. The structure is continuous in the circumferential direction without protruding. Moreover, the small diameter part 12 is formed in the side facing the piping P in the supporter main body 10, and the pipe insertion port 13 (pipe insertion part) is opening in the edge part. On the other hand, a large-diameter portion 14 is formed on the side of the supporter body 10 that faces the hose H, and a hose insertion port 15 (hose insertion portion) is opened at the end thereof. The large-diameter portion 14 can be inserted with a hose H and can also be inserted with a hose clamp HC in an expanded diameter state, and the inside is an accommodation space 16 (accommodation portion) for the hose clamp HC.

  When the hose clamp HC is housed in the housing space 16, one side edge of the clip body 3 abuts on the stepped wall 17 at the boundary between the large diameter portion 14 and the small diameter portion 12, and the outer peripheral surface of the clip body 3. Is substantially in close contact with the inner peripheral surface of the accommodation space 16. In addition, a window hole 18 for projecting the tabs 4 and 5 of the hose clamp HC is formed in a square shape on the ceiling surface side of the large diameter portion 14. A conduction path 19 extends from the opening edge of the hose insertion port 15 toward the center of the window hole 18, and both knobs 4 and 5 can be introduced into the window hole 18 through the conduction path 19. Further, an escape recess 20 is formed in the window hole 18 on the side opposite to the conduction path 19 so as to have substantially the same width as the conduction path 19. Then, when the side edge of the clip body 3 is in contact with the step wall 17, one side edge of the second knob 5 escapes into the recess 20, and the other side edge enters the conduction path 19. It has become. Specifically, when the hose clamp HC in an expanded state is accommodated in the supporter S1, both side edges of the second knob 5 are moved toward one end side in the circumferential direction of the relief recess 20 and the conduction path 19. In this position, positioning is performed by a stopper 11 described below. However, when the above-described expanded diameter state is released, the first knob piece 4 side can be shifted to a position corresponding to the reduced diameter state, and the window hole 18 allows such movement of the first knob piece 4. It opens with a length dimension that can be. In the first embodiment, the opening area of the window hole 18 extends in the direction opposite to the moving direction of the first knob 4. This is for weight reduction, and in the illustrated case, an opening 48 is provided on the side opposite to the window hole 18 to play a role of draining water.

  The hose clamp HC accommodated in the accommodation space 16 is prevented from being detached by the retaining tool 11. The stopper 11 is integrally formed of a synthetic resin material, and is formed in a substantially C shape as a whole. The whole can be fitted in a slightly narrowed state with respect to the rim of the hose insertion port 15, and the clip main body 3 is sandwiched between the retaining member 11 and the step wall 17 by attaching the retaining member 11. Is held in the state. Further, on the outer peripheral surface of the retainer 11, a thick portion 21 formed thicker than other portions is formed in the central portion in the circumferential direction, and is fitted to the conduction path 19 in an aligned state. One corner of the thick portion 21 is cut into a square shape to form a latching portion 22, and can be locked to one side edge of the second knob 5. Accordingly, as shown in FIG. 10, one side edge of the second knob 5 is sandwiched between the opening edge of the conduction path 19 and the latching portion 22, and the second knob 5 is related to the circumferential direction. When the hose clamp HC is in an expanded state by restricting the movement in both directions, the entire hose clamp HC can be positioned in the circumferential direction.

  A pair of upper protrusions 23 are formed on the outer peripheral surface of the retainer 11 at a position sandwiching the thick portion 21 in the circumferential direction, and the discontinuity of the retainer 11 on the side opposite to the side where both the upper protrusions 23 are provided. A pair of lower protrusions 24 are also formed at positions sandwiching them in the circumferential direction, and are respectively fitted into receiving holes 37 and 38 formed through the corresponding positions on the supporter S1 side. It is fixed to the supporter S1. Further, a taper-shaped guide surface 25 having a reduced diameter along the insertion direction of the hose H is formed on the inner peripheral surface of the retainer 11 so as to smoothly insert the hose H.

  Next, the holder HO for holding the hose clamp HC in an expanded state will be described (see FIGS. 7 to 9). The holder HO is formed by bending a metal plate having a predetermined shape. One end of the holder HO is bent in a substantially U shape, and the bent end is inserted into a holder mounting portion 26 formed in the vicinity of one end of the relief recess 20 on the outer peripheral surface of the supporter S1. That is, the insertion hole 27 is opened outward in the axial direction on the side end surface of the holder mounting portion 26, and the hook hole 28 is opened on the upper surface thereof, so that the insertion piece 46 arranged at one end of the holder HO is cut and raised. The latching claws 29 are elastically latched. The holder HO lifts up the standing piece 47 radially outward from the portion locked to the holder mounting portion 26 and then supports the supporter S1 so as to cross the rear of both the knobs 4 and 5. It extends along the axial direction toward the end side. However, since the holder mounting portion 26 is formed at a position slightly inward from the opening end of the small-diameter portion 12, the holder HO is inserted into the holder mounting portion 26 and rises from the holder HO in the axial direction outward. Do not protrude.

  A locking portion 7 for holding the hose clamp HC in an expanded state is formed so as to protrude from a substantially central portion of one side edge of the extended portion of the holder HO. The locking portion 7 is formed with a wide base portion and is gradually narrowed toward the tip side, but is widened again at the protruding end and has a downward slope toward the tip. 30 is formed. The width of the widened portion 30 is set smaller than the width of the release hole 9 of the first knob 4 but larger than the width of the lock hole 8. Therefore, if the widened portion 30 is inserted into the release hole 9 through the elongated hole portion of the second knob 5 and then shifted to the lock hole 8 side, the widened portion 30 is subjected to the elastic reaction force of the clip body 3. Thus, the hose clamp HC is held in an expanded state.

  The side edge of the holder HO opposite to the side where the locking part 7 is provided is folded inwardly and outwardly in an arc shape, and an operating part 31 for releasing the locking between the widened part 30 and the lock hole 8. It has become. Since the operation portion 31 has a cantilever shape with a fixed end at a portion attached to the holder mounting portion 26, when the end portion side of the operation portion 31 is pressed, a lever action is performed with the fixed end side as a fulcrum. The locking portion 7 can be displaced toward the release hole 9 with a relatively light force. In addition, the holder HO does not project the free end of the operation unit 31 axially outward from the supporter S1, and prevents the upper end of the operation unit 31 from projecting radially outward from the projecting ends of the tabs 4 and 5. It is arranged.

  Next, a holding structure for holding the supporter S1 with respect to the pipe P will be described. A sandwiched wall 32 (holding portion) that is sandwiched by the front and rear sandwiching walls bf and br on the pipe P side is located at the inner peripheral surface of the small-diameter portion 12 and slightly into the depth from the edge of the pipe insertion port 13. It is formed to project inward along the circumferential direction. The sandwiched wall 32 is cut out at four positions every 90 degrees to form cutout portions 33. In addition, a hollow stopper projection 34 is formed to project outward in the axial direction at one end of the sandwiched wall 32 that sandwiches the notches 33 from the width direction. Each notch 33 is formed with an opening width capable of passing through the front holding wall bf, and a stopper 35 for stopping the front holding wall bf in front is provided in the back thereof. Each stopper 35 is formed so as to project from the inner peripheral surface of the supporter S1 with the same projecting width as that of the sandwiched wall 32, and the longitudinal interval between the retainer wall 32 and the sandwiched wall 32 is larger than the thickness of the front sandwiching wall bf. It is set to be slightly wide. Therefore, when the front clamping wall bf is abutted against the corresponding stopper 35, the rear clamping wall br is clamped in front of the notch 33 adjacent to the circumferential direction, and a stopper projection is provided on the side thereof. The side of 34 faces. Accordingly, after the front holding walls bf pass through any of the notches 33 and abut against the stopper 35, the supporter S1 rotates in one direction with respect to the pipe P, that is, by the stopper protrusion 34. The rotation is allowed only in the direction without restriction. While the rotation is being performed, the clamping wall 32 is clamped by the front and rear clamping walls bf and br, and the rotation is performed until the rear clamping wall br comes into contact with the stopper protrusion 34 in the forward direction of the rotation. It will be a stroke. Further, the inner peripheral surface of the rim of the pipe insertion port 13 (the surface on the front side of the sandwiched wall 32), and at a position spaced apart from the stopper projection 34 in the circumferential direction, an upward slope is formed toward the stopper projection 34. An inclined surface 36 is formed. The rear holding wall br rides on the inclined surface 36 while slightly bulging and deforming the wall surface of the small-diameter portion 12 with the rotation of the supporter S1, and after getting over, between the end surface of the inclined surface 36 and the stopper projection 34. , And stored in a state of being positioned in the circumferential direction.

  Next, the operation and effect of the first embodiment configured as described above will be described in detail. Prior to the connection between the pipe P and the hose H, the hose connection device J is assembled. First, in order to bring the hose clamp HC in the reduced diameter state into the expanded state, the knobs 4 and 5 are picked up with an appropriate jig so that they are close to each other, and the enlarged diameter state is maintained with the same jig. Keep it. Next, the hose clamp HC held in an expanded state is positioned on the hose insertion port 15 side, and both the knobs 4 and 5 are adapted to the entrance side of the conduction path 19 and are pushed in along the axial direction. . And while pushing in until the side edge of the clip main body 3 hits the level | step difference wall 17, the side edge of the one side of the 2nd knob 5 is escaped, and it is in one edge part (lower edge part in FIG. 10) of the recess 20. The entire hose clamp HC is held at the abutting position.

  On the other hand, in order to mount the holder HO on the supporter S1, one end thereof is inserted into the holder mounting portion 26 so that the locking portion 7 of the holder HO faces the hose clamp HC side. Next, the hose clamp HC is rotated toward the holder HO, and the second knob 5 is released and is locked to the other end of the recess 20 (the upper end in FIG. 10). At that time, the widened portion 30 of the holder HO is moved to the lock hole 8 side after passing through the release hole 9 of the first knob 4. When both the knobs 4 and 5 are released from the knob operation by the jig, the operating portion 31 is pressed against the second knob 5 by the elastic force of the hose clamp HC, and the widened portion 30 is pressed around the lock hole 8. Since it is locked in the state and the return to the release hole 9 side is restricted, both the knob pieces 4 and 5 are held in an approached state, and the entire hose clamp HC is held in an expanded state.

  Next, the stopper 11 is fitted on the hose insertion port 15 side so that the thick portion 21 fits the conduction path 19 and is squeezed into the hose insertion port 15 while being deformed. When the upper protrusion 23 and the lower protrusion 24 are fitted in the corresponding receiving holes 37 and 38, the stoppers 11 are restored, and the protrusions 23 and 24 and the receiving holes 37 and 38 are fitted together. 11 is installed. As a result, the clip body 3 is sandwiched between the retainer 11 and the step wall 17 to be positioned in the axial direction, and the second knob 5 is connected to the latching portion 22 of the thick portion 21 and the conduction path. Positioning in the circumferential direction is also performed between the 19 opening edges. Thus, the hose connection device J in which the hose clamp HC is assembled to the supporter S1 is assembled.

  Subsequently, the pipe P is inserted from the pipe insertion port 13. At this time, the front holding wall bf is made to correspond to the notch 33 and the end of the pipe P is pushed into the small diameter portion 12 until it hits the stopper 35. When the supporter S1 is rotated in one direction around the axis of the pipe P (counterclockwise in FIGS. 2 and 3), the front holding wall bf slides on the inner surface side of the corresponding held wall 32. The rear sandwiching wall br is in sliding contact with the outer surface of the sandwiched wall 32 at another position. Then, when the rear holding wall br gets over the inclined surface 36 and is fitted between the end portion of the inclined surface 36 and the stopper projection 34, the rear side is detented and further restricted in rotation. Accordingly, the hose connecting device J and the pipe P are positioned in the circumferential direction, and the front and rear clamping walls bf and br are also positioned in the axial direction by sandwiching the sandwiched wall 32 from the axial direction. Therefore, it becomes possible to position the position of both the pick pieces 4 and 5 in the hose clamp HC in the optimum direction according to the work environment.

  At the connection site with the hose H, the end of the hose H is inserted from the hose insertion port 15 through the guide surface 25 to the depth where it is abutted against the inner surface side of each stopper 35 through the inner peripheral side of the clip body 3. An insertion is made. In that case, the hose H only needs to be fitted into the general part of the pipe P, and it is not necessary to get over the conventional bulge part. Thus, when the hose H is fitted to the pipe P to the normal depth, the operation part 31 of the holder HO is pushed down. Accordingly, the entire locking portion 7 is displaced downward, so that the widened portion 30 is released from the locking hole 8 and moved to the release hole 9. Then, the first knob 4 moves in the window hole 18 by the elastic reaction force of the hose clamp HC, and the clip main body 3 shifts to the reduced diameter state. As a result, the hose H is tightened at the connection portion with the pipe P, and the connection work is completed.

  By the way, conventionally, the hose disconnection is regulated by regulating the movement of the hose clamp by using the hook between the hose clamp and the bulge part. However, in the first embodiment, instead of this, the supporter S1 integrated with the hose clamp HC is engaged with the bulge portion b. Therefore, conventionally, the hose H has to be inserted to a depth over the bulge part b, and a large force is required to insert the hose H. However, in this embodiment, the hose H does not get over the bulge part b. Insertion work can be done with a lighter force than before because it only needs to be fitted into the general part.

  Further, since the attachment of the hose connecting device J to the pipe P, which is performed prior to the connection with the hose H, may be performed only by rotating the supporter S1 relative to the pipe P, the assembly workability is excellent. . Further, since the distance between the sandwiching walls bf and br that sandwich the sandwiched wall 32 in the axial direction is shifted by shifting the phase in the circumferential direction, work is performed when the sandwiching walls bf and br are brazed or the like. Easy to do. In addition, since the structure on the supporter S1 side for positioning the supporter S1 and the pipe P in the axial direction is only the sandwiched wall 32, the structure on the supporter S1 side can be simplified.

  Further, when the hose clamp HC in the expanded diameter state is incorporated into the supporter S1, the supporter S1 is not constituted by two divided members but by a single member, so that the connection structure is exposed to the outside. It will be effective in dealing with stepping stones.

  Furthermore, since the holder HO is integrated with the supporter S1 in the first embodiment, it is easy to manage parts and remains in the supporter S1 even after the diameter expansion is released. You can also Further, since the structure portion (holder HO) for maintaining the expanded state as in the conventional holderless type is formed separately from the hose clamp HC, it is determined where the supporter S1 is to be attached. This increases the degree of freedom in designing the form. Therefore, although the holder HO in the first embodiment is used for releasing the diameter expansion by utilizing the lever action, it is easy to take a form in which the arm length of the operation unit 31 is increased, and work during the releasing operation is performed. Contributes to reducing the burden on the However, even if the arm length of the operation portion 31 is sufficiently ensured, it does not protrude from the axial direction with respect to the supporter S1, and is arranged at a position lower than the knobs 4 and 5, There is little possibility that the expanded diameter state is inadvertently canceled due to the collision of the foreign matter.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment differs from the first embodiment in the positioning structure of the pipe P and the supporter S2. Since other structures are the same as those of the first embodiment, the same structures are denoted by the same reference numerals and description thereof is omitted.

  The bulge part b of the first embodiment is configured by the sandwiching walls bf and br that are displaced in the axial direction, but the bulge part b of the second embodiment has no such positional deviation in the axial direction. It has a structure in which the pieces are arranged symmetrically with respect to the circumferential direction on the same circumference. Therefore, the structure of the supporter S2 side (the sandwiched wall 32) is sandwiched from the axial direction by the sandwiching walls bf and br on the pipe P side in the first embodiment, whereas the structure of the supporter S2 side in the present embodiment. The bulge part b is held between the two.

  In the supporter S <b> 2, a flange edge 39 is formed on the edge of the pipe insertion port 13 so as to protrude inward along the circumferential direction. Square recesses 40 are formed in the flange 39 at intervals of about 90 degrees, and those at symmetrical positions can pass through both bulge portions b on the pipe P side. The flange 39 is divided into four pieces by the respective recesses 40, and positioning recesses 41 for positioning the supporter S2 in the circumferential direction with respect to the pipe P are formed on the inner surfaces of the respective divided regions. Is formed. The positioning recess 41 is formed over substantially the entire length range of each of the divided regions described above, and a pair of riding surfaces 42 are arranged at both ends in the circumferential direction at intervals in the circumferential direction, and both protrude toward the back. Yes. In addition, the rising surfaces 42 that face each other are inclined upward in the direction of approaching each other and along the circumferential direction, the surfaces of the riding surfaces 42 that make a pair are opposed to each other, and the two rising surfaces 42 The interval in the circumferential direction is set slightly wider than the width dimension of the bulge part b. Further, the rear end surfaces in the axial direction of the supporter S2 on the riding surface 42 are connected to prevent the bulge portion b from coming off in the axial direction. Furthermore, since the bulge part b is stored in the positioning recess 41, the pipe P and the supporter S2 are held in a state where they are positioned in both directions in the circumferential direction.

  In the supporter S2, a retainer 43 is arranged at a predetermined distance from the flange 39 behind the flange 39. The retainer 43 receives the abutment of the bulge part b when the pipe P and the supporter S2 are initially fitted, and accommodates the bulge part b in the positioning recess 41 when the pipe P and the supporter S2 are relatively rotated. While playing a role, it plays the role which regulates that the bulge part b accommodated in the positioning recessed part 41 moves to an axial direction (disconnection direction). That is, the retainer 43 is integrally formed in a ring shape with a synthetic resin material having appropriate elasticity, and retaining projections 44 are formed on the outer periphery of the retainer 43 so as to protrude at four positions at intervals of 90 degrees. On the other hand, the mounting holes 45 pass through the outer peripheral surface of the small-diameter portion 12 of the supporter S2 at positions corresponding to the respective recesses 40, and the retainer 43 as a whole is attached by inserting the retaining projections 44 into these holes. Yes. Therefore, since the retainer 43 is fixed at a position corresponding to the recess 40, even if the bulge part b that has passed through the recess 40 is abutted when the pipe P and the supporter S2 are initially fitted, the retainer 43 moves backward. There is no elastic displacement. On the contrary, the range corresponding to each divided region of the flange 39 of the retainer 43 is not restricted by the supporter S2, and elastic displacement in the axial direction is allowed. And since the space | interval regarding the axial direction of the top part of the said riding surface 42 and the retainer 43 is set sufficiently smaller than the thickness dimension of a bulge part, a bulge is accompanied with relative rotation of the piping P and supporter S2. In the process in which the portion b passes over the riding surface 42, the retainer 43 is elastically displaced backward by the bulge portion b, and when the bulge portion b passes through the riding surface 42, it is pushed back outward by the elastic reaction force of the retainer 43. And accommodated in the positioning recess 41.

  A semicircular cutout 49 is formed at a position corresponding to each retaining protrusion 44 on the inner peripheral surface of the retainer 43. This is because the retainer is incorporated into the supporter S2 by an automatic machine. It can be omitted depending on the assembly conditions.

  Even in the second embodiment configured as described above, the hose connection device J is installed on the pipe P when the hose clamp HC maintained in the expanded state is integrated in the supporter S2. It is carried in. At the same site, the pipe P is inserted through the pipe insertion port 13, and the bulge part b passes through the recess 40 and abuts against the retainer 43. Then, if the pipe P and the supporter S2 are relatively rotated, the bulge part b is automatically accommodated in the positioning recess 41 after passing through the riding surface 42 by the elastic reaction force of the retainer 43, whereby the supporter S2 And the pipe P are positioned together in the circumferential direction and the axial direction. Therefore, also in the present embodiment, the mounting operation of the hose connection device J to the pipe P can be performed smoothly. In addition, when inserting the hose H into the pipe P, the insertion depth of the hose H is restricted at a position where the end of the hose H comes into contact with the bulge part b. That's it.

  Furthermore, in the present embodiment, it is unnecessary to consider shifting the bulge part b back and forth in the axial direction as in the first embodiment, so that the configuration of the pipe P can be simplified as compared with the first embodiment. The effect of is also obtained.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) The number of sandwiching walls should not be limited to that shown in the figure. Therefore, the angular interval in the circumferential direction can also be changed as appropriate, and overlapping in the circumferential direction may occur between the front and rear groups. .

  (2) The bulge part may be formed at the same time as the pipe P is formed, in addition to the part that is brazed to the pipe P.

  (3) The holding in the expanded state is not necessarily performed by the holder HO, and the above-described holderless type can also be used.

  (4) A supporter does not necessarily need to be comprised from two members, a supporter main body and a retainer, and may comprise both as a single member. For example, a configuration in which a retaining means that can be elastically deformed in the supporter body is configured and elastically locked to the hose clamp is conceivable.

1 is an exploded perspective view of a hose connection device according to Embodiment 1. FIG. Rear view showing the state before inserting the piping into the supporter and before turning. Rear view showing the state after rotation Top view of the supporter body Bottom view of the supporter body Perspective view of hose clamp in reduced diameter state Top view of holder Same front view Same side view Top view of connection device Side cross-sectional view of the connection device when the hose clamp is in an expanded state Side sectional view of the connecting device when it is also in a reduced diameter state Front sectional view of the connecting device when the hose clamp is in an expanded state Front sectional view of the connecting device when it is also in a reduced diameter state The disassembled perspective view of the connection apparatus in Embodiment 2. Retainer front view Front view showing a partially broken state after the piping is inserted into the supporter but before turning. Similarly, a partially cutaway front view showing the state after the turning operation

Explanation of symbols

4, 5 ... Picking piece 7 ... Locking part 16 ... Storage space 31 ... Operation part 32 ... Clamping wall (holding part)
b ... Bulge part bf, br ... Holding wall H ... Hose HO ... Holder J ... Hose connection device P ... Piping S1, S2 ... Supporter

Claims (8)

A hose connection device for connecting a hose to a pipe,
It is formed by turning in a ring shape and is always kept in an expanded state where the hose can be inserted, but by releasing the expanded state, it can move to a reduced diameter state by its own spring force and tighten the hose A hose clamp,
A housing part that can house the hose clamp in a retaining state is provided inside, and a hose insertion part into which the hose can be inserted is opened at one end side, and the pipe can be inserted into the other end side. A supporter with an open insertion part,
Provided in the pipe insertion portion, and latched with a bulge portion that projects from the outer peripheral surface of the pipe when the pipe is inserted into the pipe insertion portion from the axial direction and rotated relative to the periphery of the axis. And a holding part for holding the supporter with respect to the pipe together with the hose clamp. Both ends of the hose clamp are erected outward in the radial direction, and the expanded diameter state is maintained by holding both ends of the hose clamp close to each other by holding means formed integrally or separately from the hose clamp. Are to be retained,
On the other hand, the supporter is formed in a cylindrical shape that opens to both ends in the axial direction, and the hose clamp in the expanded state can be incorporated through the opening on one side of the two openings. The hose connection device according to claim 1, wherein the outer peripheral surface is a continuous surface along the circumferential direction. The bulge portion has a sandwiching wall that stands up and down in the axial direction of the pipe, while a sandwiched wall extends in the circumferential direction on the inner peripheral surface of the pipe insertion portion of the supporter. In addition, a notch portion is formed in the sandwiched wall to allow passage of the sandwiching wall located on the front side in the insertion direction, and the front sandwiching wall located on the front side in the insertion direction passes through the notch portion. 3. The hose connection device according to claim 1, wherein the clamped surface is clamped between the front and rear clamping walls when the pipe is rotated relative to the supporter. 4. . A plurality of the clamping walls are arranged with a predetermined gap between the front and rear in the axial direction of the pipe, and the front clamping wall and the rear clamping wall do not overlap in the circumferential direction. The hose connection device according to claim 3, wherein the phases are shifted from each other. An inner peripheral surface of the pipe insertion portion, and a front-end holding portion for projecting a front-side clamping wall that has passed through the notch portion protrudes from the notch portion in front of the insertion direction. The hose connection device according to claim 3 or claim 4. An inner peripheral surface of the pipe insertion portion in the supporter, and at least one of the inner and outer sides of the sandwiched wall, the front side when the pipe is rotated relative to the supporter A positioning part is provided for positioning the supporter with respect to the pipe in the circumferential direction by sandwiching the holding wall or / and the rear holding wall in the circumferential direction, and the positioning part is provided on the front holding wall or the rear side A stopper protrusion is provided on the front side of the holding wall in the rotation direction, and an inclined surface is formed on the rear side in the rotation direction so that the front side holding wall or the rear side holding wall can be deterred and stopped. The hose connection device according to any one of claims 3 to 5, wherein the hose connection device is characterized in that: A plurality of the bulge portions are arranged on the same circumference on the outer peripheral surface of the pipe, and a flange edge projects inwardly at the opening edge of the pipe insertion portion of the supporter. Of these, a recess that can pass through each bulge is cut out at a position corresponding to the bulge, and the inner peripheral surface of the supporter is located at a predetermined distance from the ridge at the back of the ridge. The ring-shaped retainers are arranged opposite to each other, and when the bulge part passes through the recess, it can be held against the bulge part and assembled in a state where elastic displacement in the axial direction is allowed. Furthermore, a positioning recess is provided on the inner surface of the flange edge so that the bulge portion can be sandwiched from the circumferential direction.
After each bulge part passes through the recess, when the pipe is rotated relative to the supporter, the positioning concave part rises along the advancing direction of the bulge part on the side facing the bulge part. In the process in which the sloped riding surface is formed and the bulge part rides on this riding surface, the retainer is elastically displaced in the back, and when the bulge part gets over the riding surface, the elastic reaction force of the retainer The hose connection device according to claim 1 or 2, wherein the pipe is positioned with respect to the supporter with respect to a circumferential direction by the bulge portion being pressed into the positioning recess. The portion of the retainer corresponding to the recess is a fixed portion that is attached to the supporter, and the other region is a movable portion that is unconstrained with respect to the supporter. The hose connection device described.

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