JP2015086979A - Sleeve for hose joint, hose joint and hose joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sleeve for hose joint, hose joint and hose joint structure in which the number of component parts is less, the hose can be fixed under superior workability and the connected hose is hardly dropped out.SOLUTION: There are provided a tapered hose joint of which outer circumferential surface is expanded in its diameter toward the extremity end side of a hose to be connected; and a sleeve for hose joint to hold and fix the hose inserted along an outer circumferential surface of the hose joint. The hose joint is tapered to cause its outer circumferential surface to be expanded in its diameter toward the extremity end side of the hose connected. Its outer circumferential surface is provided with a plurality of annular protrusions along the circumference. The sleeve for hose joint is a cylinder covering the outer circumferential surface of the hose. The inner circumferential surface of the cylinder has a taper of the same inclination as that of the hose joint. The inner circumferential surface of the cylinder is formed with a female thread over its entire length, a female thread is advanced while being rotated along the outer circumferential surface of the hose inserted into the hose joint and then the hose is held and fixed between it and the hose joint.

Description

  The present invention relates to a hose joint sleeve, a hose joint, and a hose joint structure including these. More specifically, the present invention relates to a hose joint sleeve, a hose joint, and a hose joint structure including the hose joint, in which the number of parts is small, the hose can be attached with good workability, and the connected hose is not easily dropped.

  A hose used for supplying fluid such as compressed air to various machines and facilities is connected using a hose joint (also referred to as a nipple). The hose joint is tubular, and one end side thereof is connected to mechanical equipment or a pipe, and the other end side is connected to the hose. If the connection between the hose coupling and the hose is loosened due to external force, vibration, or the like, problems such as fluid leakage from the connection part or dropout of the hose occur. In order to prevent this, it is usually necessary to fix the hose to the hose joint by binding the hose to the hose joint or by using a hose joint sleeve (for example, Patent Documents 1 and 2). See).

  The joint described in Patent Document 1 firmly fixes the hose by interposing a coil spring between the hose and the cylindrical member. Moreover, the hose coupling described in Patent Document 2 attempts to prevent the hose from falling off and breaking by devising the shape of the bamboo nipple and the hose root side of the fastening tool.

JP2008-101666 JP 2006-220186 A

  However, in the joint described in Patent Document 1, when a coil spring is provided between the hose and the cylindrical member and the hose is fastened and fixed, the hose is inserted between the hose connection portion and the cylindrical member, Since it is necessary to extrapolate and wind the spring around the circumferential surface of the hose, there is a problem that the number of parts increases. Further, the hose joint described in Patent Document 2 requires caulking with a tightening tool, and it takes time and effort to uniformly caulk.

  The present invention has been made in view of the above circumstances, and has a small number of parts, a hose that can be attached with good workability, and a hose that is difficult to drop off, and a hose comprising these. An object is to provide a joint structure.

The present invention is as follows.
1. A hose joint sleeve that clamps and fixes a hose inserted along the outer peripheral surface of the hose joint with respect to a tapered hose joint whose outer peripheral surface expands toward the tip of the hose to be connected. And
It is a cylindrical body that covers the outer peripheral surface of the hose,
The inner peripheral surface of the cylindrical body includes a taper having the same inclination as the taper of the hose joint,
An internal thread is formed over the entire length of the inner peripheral surface of the cylindrical body,
A hose joint sleeve, wherein the hose is clamped and fixed between the hose joint by rotating along the outer peripheral surface of the hose inserted into the hose joint and advancing the female screw.
2. 1 above. A hose coupling for using the hose coupling sleeve described above,
A taper is attached to the outer peripheral surface of the hose to be connected, with the diameter increasing.
A hose coupling comprising a plurality of annular projections formed along the circumference on the outer circumferential surface.
3. The annular protrusion is formed such that a side surface which is a tip side of the connected hose is formed perpendicular to the outer peripheral surface, and an opposite side surface is formed inclined with respect to the outer peripheral surface. 2. The hose coupling described.
4). 2. The non-slip portion that inhibits the rotation of the hose in the circumferential direction on the outer peripheral surface corresponding to the tip of the connected hose. Or 3. The hose coupling described.
5. A fixing portion in which a male screw corresponding to the female screw provided in the hose coupling sleeve is formed;
In the state where the hose is inserted, the distal end side of the hose coupling sleeve is further advanced than the distal end surface of the hose, whereby the hose coupling sleeve and the fixing portion are screwed and fixed. Thru 4. The hose coupling according to any one of the above.
6). 1 above. 2. The hose coupling sleeve according to claim 2; To 5. A hose coupling according to any one of
The hose joint structure is characterized in that the hose joint sleeve is rotated along the outer peripheral surface of the hose inserted into the hose joint, and the hose is clamped and fixed between the hose joint by advancing the female screw. body.

  According to this hose coupling sleeve, the hose to be inserted along the outer peripheral surface of the hose joint is sandwiched with respect to the tapered hose joint whose outer peripheral surface is enlarged toward the distal end side of the hose to be connected. A hose joint sleeve to be fixed, which is a cylindrical body that covers the outer peripheral surface of the hose, and the inner peripheral surface of the cylindrical body has a taper of the same inclination as the taper of the hose joint, and the inner peripheral surface of the cylindrical body An internal thread is formed over the entire length of the surface, and it is rotated along the outer peripheral surface of the hose inserted into the hose joint, and the hose is clamped and fixed between the hose joint by advancing the internal thread. The inserted hose can be easily fixed by lightly screwing the hose coupling sleeve. Further, in the entire clamping range by the hose coupling sleeve, the distance between the outer peripheral surface of the hose coupling and the inner peripheral surface of the hose coupling sleeve is kept constant, and the hose is clamped by uniform pressure, thus improving airtightness. At the same time, the hose can be firmly fixed to prevent dropping. Moreover, a hose joint structure can be comprised only from two components called the hose joint sleeve and a hose joint.

According to the present hose coupling, the hose coupling for using the hose coupling sleeve is provided with a taper whose outer peripheral surface is enlarged toward the distal end side of the hose to be connected. Since a plurality of annular protrusions formed along the line are provided, the airtightness of the hose connection part can be improved. Further, the connected hose can be prevented from falling off due to the friction of the outer peripheral surface and the biting of the annular protrusion.
In addition, when the annular protrusion is formed such that the side surface on the tip side of the connected hose is formed perpendicular to the outer peripheral surface and the side surface on the opposite side is inclined with respect to the outer peripheral surface, Due to the side surface, it is difficult to be caught when the hose is inserted, and the hose can be easily inserted. Further, since the vertical side surface of the annular protrusion bites into the inner peripheral surface of the hose, it is possible to prevent the connected hose from coming off.
When the outer peripheral surface corresponding to the tip of the connected hose is provided with a non-slip part that hinders the hose from rotating in the circumferential direction, the hose fully inserted into the hose joint rotates in the circumferential direction together with the hose joint sleeve. Therefore, the hose can be more reliably fixed by the hose coupling sleeve.
The hose joint is provided with a fixing portion formed with a male screw corresponding to the female screw provided in the hose joint sleeve, and the hose joint sleeve is advanced further than the front end surface of the hose with the hose inserted. When the sleeve for fixing and the fixing portion are fixed by screwing, the hose coupling sleeve is firmly fixed, and even if an external force or vibration is applied, the hose fixing sleeve is not loosened. Can be prevented.

  According to this hose coupling structure, the hose coupling sleeve includes a hose coupling sleeve and a hose coupling, the hose coupling sleeve is rotated along the outer peripheral surface of the hose inserted into the hose coupling, and the internal thread is advanced to hose the hose. Since it is clamped and fixed between the joints, the hose inserted into the hose joint can be easily fixed by lightly screwing the hose joint sleeve. Further, in the entire clamping range by the hose coupling sleeve, the distance between the outer peripheral surface of the hose coupling and the inner peripheral surface of the hose coupling sleeve is kept constant, and the hose is clamped by uniform pressure, thus improving airtightness. At the same time, the hose can be firmly fixed to prevent dropping. Moreover, a hose joint structure can be comprised only from two components called the hose joint sleeve and a hose joint.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is a side view which shows the external appearance of the hose coupling which comprises a hose coupling structure, and the sleeve for hose couplings. It is sectional drawing seen from the side surface which shows the structure of the hose coupling which comprises a hose coupling structure, and the sleeve for hose couplings. In the hose coupling which comprises a hose coupling structure, it is the elements on larger scale seen from the side which shows the structure of an annular protrusion. It is sectional drawing seen from the side surface which shows the hose coupling structure which clamps and fixes a hose. It is a partial expanded sectional view seen from the side which shows the hose coupling structure which clamps and fixes a hose. It is a side view which shows the external appearance of the hose coupling which comprises another hose coupling structure, and the sleeve for hose couplings. It is sectional drawing seen from the side surface which shows the structure of the hose coupling which comprises another hose coupling structure, and the sleeve for hose couplings. It is sectional drawing seen from the side surface which shows the hose coupling structure which clamps and fixes another hose.

Hereinafter, the present invention will be described in detail with reference to the drawings.
The items shown here are for illustrative purposes and exemplary embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

The external appearance of the hose joint structure according to the present embodiment is shown in FIG. 1, and its cross section is shown in FIGS. The hose joint structure 1 is a joint structure for connecting the hose 9 to piping of various machines, facilities, and the like, and includes a hose joint sleeve 21 and a hose joint (also referred to as a bamboo nipple) 31. The hose 9 is inserted into one end side (32 side) of the hose joint 31, and the hose 9 is fixed by the hose joint sleeve 21. The other end side (38 side) of the hose coupling 31 is fixed to the above-mentioned equipment (not shown).
The dimensions and shape of the hose joint 31 are not particularly limited. For example, the outer diameter of the outer peripheral surface 32 on one end side of the hose joint 31 can be about 10 to 20 mm.

The outer peripheral surface 32 on the one end side of the hose joint 31 is tapered so as to increase in diameter toward the distal end side of the hose 9 to be connected. The material of the hose joint 31 is not particularly limited, and can be formed using metal, resin, or the like.
The hose 9 may be a soft hose that can be inserted into the one end side of the hose joint 31 while expanding its inner diameter, and the material, dimensions, etc. thereof are not particularly limited.

(Sleeve for hose coupling)
The hose coupling sleeve 21 is used by covering the outer peripheral surface of the hose 9, and sandwiches and fixes the hose 9 inserted along the outer peripheral surface of the hose coupling 31 with respect to the tapered hose coupling 31. It is a cylindrical body. The material of the hose coupling sleeve 21 is not particularly limited, and can be formed using metal or resin. The shape of the outer peripheral surface 24 of the hose coupling sleeve 21 can be a hexagonal column-shaped peripheral surface so that the hose coupling sleeve 21 can be rotated by a wrench, for example. Moreover, it is good also as another shape.
The axial length of the hose coupling sleeve 21 can be substantially the same as the axial length of the outer peripheral surface 32 on one end side of the hose coupling 31, but is not limited thereto. For example, the hose coupling sleeve 21 may be longer than the length of one end side of the hose coupling 31.

  As shown in FIG. 2, the inner peripheral surface 22 of the hose coupling sleeve 21 is tapered so that the tip end side of the hose 9 to be connected has an enlarged diameter over the entire length in the axial direction. The inclination of the taper of the inner peripheral surface 22 is the same as the taper attached to the outer peripheral surface 32 of the hose joint 31.

A female thread 23 is formed on the inner peripheral surface 22 of the hose coupling sleeve 21 over the entire length. The inner diameter of the hose coupling sleeve 21 is narrower than the outer diameter of the hose 9 inserted into the hose coupling 31, and the top of the crest of the female screw 23 presses the outer peripheral surface of the hose 9. The inner peripheral surface can be brought into strong pressure contact with the outer peripheral surface 32 and the annular protrusion 33 of the hose joint 31 to improve airtightness.
The pitch of the female screw 23, the shape of the thread, and the like can be arbitrarily selected so that the hose 9 can be appropriately held.
By rotating the internal thread 23 along the outer peripheral surface of the hose 9 inserted into the hose joint 31, the hose joint sleeve 21 can be easily advanced toward the distal end of the hose 9. Accordingly, the hose 9 can be securely sandwiched and fixed between the hose joint 31 and the hose joint sleeve 21.

(Hose fitting)
The hose joint 31 is a hose joint for using the hose joint sleeve 21 and is a tubular body to which the hose 9 is connected at one end side (32 side).
The other end side 38 of the hose joint 31 can have an arbitrary configuration. For example, as shown in FIGS. 1 and 2, a male screw can be formed on the outer peripheral surface of the other end side 38 so that it can be attached to piping of equipment, equipment, etc. (not shown). In addition, the other end side 38 may be configured to connect a pipe extended from a device or the like, or may be configured to connect another hose.
A partition portion 39 can be provided between one end side (32 side) and the other end side 38 of the hose joint 31. The shape of the partition part 39 is not particularly limited.

  The outer peripheral surface 32 on one end side of the hose joint 31 is tapered so as to increase in diameter toward the distal end side (partition side 39 side) of the hose 9 to be connected. A plurality of annular projections 33 formed along the outer peripheral surface 32 can be provided at predetermined intervals in the axial direction. The number, size, shape, and the like of the annular protrusion 33 are not particularly limited as long as the inner surface of the hose 9 can be strongly pressed. The annular protrusion 33 can maintain the airtightness of the hose connection portion and can prevent the hose 9 from coming off. A flat outer peripheral surface 32 is formed between one annular protrusion 33 and an adjacent annular protrusion 33.

FIG. 3 is a partially enlarged view of the outer peripheral surface 32 of the hose joint 31 provided with the annular protrusion 33. As shown in the figure, the annular protrusion 33 has a side surface 34 on the tip side of the hose 9 connected to the hose joint 31 formed perpendicular to the outer peripheral surface 32, and a side surface 35 on the opposite side to the outer peripheral surface 32. It is preferable that it is formed to be inclined with respect to. With such a structure, the inclined side surface 35 makes it difficult to be caught when the hose 9 is inserted, and the hose 9 can be easily attached to the hose joint 31. Further, when a force is applied in a direction in which the hose 9 is detached from the hose joint 31, the vertical side surface 34 bites into the inner peripheral surface of the hose 9, so that the connected hose 9 can be prevented from coming off.
The number of the annular protrusions 33 may be two or more, and the number is not limited. Moreover, the space | interval which arrange | positions the annular protrusion 33 can also be selected suitably.

(Hose joint structure)
FIG. 4 shows a state in which the hose 9 is sandwiched and fixed between the hose joint 31 by the hose joint sleeve 21. The hose joint structure 1 is composed of only two parts, a hose joint sleeve 21 and a hose joint 31.
In order to connect and fix the hose 9 to the hose joint 31, first, the hose 9 is inserted along the outer peripheral surface 32 of the hose joint 31. The diameter of the hose 9 is increased according to the taper of the outer peripheral surface 32 of the hose joint 31. Further, the inner peripheral surface of the hose 9 is strongly pressed by an annular protrusion 33 provided on the outer peripheral surface 32, but the side surface 35 of the annular protrusion 33 is inclined in the direction in which the hose 9 is pushed in, so that the insertion is easy. .

  Next, the hose coupling sleeve 21 through which the hose 9 has been inserted is moved to the connecting portion of the hose 9. Then, if the hose joint sleeve 21 is rotated along the outer peripheral surface of the hose 9 inserted into the hose joint 31, the hose joint sleeve 21 is directed to the tip side of the hose 9 (in the direction of the partition portion 39 of the hose joint 31). move on. Since the inner peripheral surface of the hose joint sleeve 21 is tapered with the same inclination as the outer peripheral surface 32 of the hose joint 31 and the female screw 23 is formed, the hose joint sleeve 21 is connected to the outer periphery of the hose 9. You can go along the surface without difficulty. The hose 9 is sandwiched and fixed between the hose joint sleeve 21 and the hose joint 31 in a state where the hose joint sleeve 21 reaches the partition 39 of the hose joint 31.

Since the taper of the inner peripheral surface 22 of the hose joint sleeve 21 is the same as the taper of the outer peripheral surface 32 of the hose joint 31, the hose 9 having a certain thickness is connected to the hose joint sleeve 21 and the hose joint 31. It becomes possible to insert it between them.
FIG. 5 is a partially enlarged view of the hose 9 sandwiched between the hose joint 31 and the hose joint sleeve 21 shown in FIG. 4. Since the taper angle of the outer peripheral surface 32 of the hose joint 31 and the taper angle of the inner peripheral surface of the hose joint sleeve 21 are the same, the inner peripheral surface of the hose joint sleeve 21 (of the internal thread 23) is increased from the outer peripheral surface 32 of the hose joint 31. The gap d (d1, d2) corresponding to the distance to the peak of the mountain is constant without changing depending on the position in the axial direction. As a result, the hose 9 receives a uniform pressure from the hose joint sleeve 21 over the entire outer peripheral surface 32 of the hose joint 31, and the inner peripheral surface of the hose 9 and the outer peripheral surface 32 of the hose joint 31 are fixed tightly. Will be.

Moreover, the hose 9 expanded in diameter by the taper of the outer peripheral surface 32 of the hose joint 31 is pressed against the hose joint 31 by its own contraction force and the uniform pressure from the hose joint sleeve 21. The height of the hose joint 31 is prevented from being increased and the height is prevented.
The airtightness of the hose 9 and prevention of disconnection can be made more effective by providing the annular protrusion 33 on the outer peripheral surface of the hose joint 31 so as to bite into the inner peripheral surface of the hose 9. Further, if the side surface 34 of the annular projection 33 that is the tip side of the hose is formed perpendicular to the outer peripheral surface 32, the side surface 34 receives the force in the direction in which the hose 9 is pulled out. It can be effectively prevented.
The hose joint structure 1 may be provided only at one end of the hose 9 or may be provided at both ends.

(Hose joint structure of another aspect)
This hose coupling structure is not limited to the hose coupling 31 and the hose coupling sleeve 21 shown in FIGS.
For example, in the hose joint structure 1 ′ shown in FIGS. 6 to 8, the hose joint 3 is provided on the outer peripheral surface corresponding to the tip of the connected hose 9, and the non-slip part 36 that inhibits the circumferential rotation of the hose 9. Can be provided.
The non-slip portion 36 only needs to have irregularities for inhibiting the rotation of the hose 9 in the circumferential direction, and the number, size, shape, etc. of the irregularities are not particularly limited. For example, as the non-slip portion 36, it is possible to form irregularities by subjecting the outer peripheral surface to an arbitrary knurling process. The knurling can be, for example, vertical knurling so that a large number of axial protrusions of the hose joint 3 are formed along the outer periphery. The height of the convex portion can be approximately the same as that of the annular protrusion 33.
Since the hose 9 is prevented from rotating in the circumferential direction by the non-slip portion 36, it is possible to prevent the hose 9 from rotating in the circumferential direction together with the hose coupling sleeve 21. Thereby, it is possible to prevent the hose joint sleeve 21 from being sufficiently tightened or the hose 9 from falling off the hose joint 3 due to loose tightening.

Moreover, as shown in FIGS. 6-8, the hose coupling 3 can be equipped with the fixing | fixed part 37 in which the external thread corresponding to the internal thread 23 provided in the internal peripheral surface 22 of the hose coupling sleeve 21 was formed. Although the fixing | fixed part 37 can be provided between the partition part 39 and the outer peripheral surface 32 part or the antiskid part 36, it is not restricted to this. The fixing portion 37 may be formed at one end of the outer peripheral surface of the hose joint 3.
With the hose 9 fully inserted into the hose joint 3, the front end side of the hose joint sleeve 21 is further advanced from the front end surface of the hose 9, so that the hose joint sleeve 21 and the fixing portion 37 are screwed together. Fixed. By screwing the male screw of the fixing portion 37 and the female screw 23 of the inner peripheral surface 22 of the hose coupling sleeve 21, it is possible to prevent the hose coupling sleeve 21 from being loosened due to external force, vibration, or the like.

  The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the present invention depending on the purpose and application. For example, the hose joint 31 shown in FIGS. 1 to 8 has a straight pipe shape, but is not limited thereto, and may be an L-shaped tubular body bent at the partition portion 39. Moreover, the other outer side 38 of the hose coupling 31 may be provided with the same outer peripheral surface and annular projection as the one end side so that other hoses can be connected. Moreover, it is good also as a hose set which provided the hose coupling structure at the one end or both ends of the hose.

  This hose coupling is mainly used as a hose coupling for a hose that supplies compressed air.

  DESCRIPTION OF SYMBOLS 1; Hose coupling structure, 21; Sleeve for hose coupling, 22; Inner peripheral surface, 23; Female thread, 24; Outer peripheral surface, 3, 31; Hose coupling, 32; Outer peripheral surface, 33; , 35; inclined surface, 36; anti-slip part, 37; fixing part, 38; other end side, 39; partition part, 9;

Claims (6)

A hose joint sleeve that clamps and fixes a hose inserted along the outer peripheral surface of the hose joint with respect to a tapered hose joint whose outer peripheral surface expands toward the tip of the hose to be connected. And
It is a cylindrical body that covers the outer peripheral surface of the hose,
The inner peripheral surface of the cylindrical body includes a taper having the same inclination as the taper of the hose joint,
An internal thread is formed over the entire length of the inner peripheral surface of the cylindrical body,
A hose joint sleeve, wherein the hose is clamped and fixed between the hose joint by rotating along the outer peripheral surface of the hose inserted into the hose joint and advancing the female screw. A hose coupling for using the hose coupling sleeve according to claim 1,
A taper is attached to the outer peripheral surface of the hose to be connected, with the diameter increasing.
A hose coupling comprising a plurality of annular projections formed along the circumference on the outer circumferential surface.   The annular protrusion is formed such that a side surface that is a tip side of the connected hose is formed perpendicular to the outer peripheral surface, and an opposite side surface is formed to be inclined with respect to the outer peripheral surface. Item 3. A hose coupling according to item 2.   The hose coupling according to claim 2 or 3, further comprising a non-slip portion that inhibits rotation in a circumferential direction of the hose on an outer peripheral surface corresponding to a tip portion of the connected hose. A fixing portion in which a male screw corresponding to the female screw provided in the hose coupling sleeve is formed;
3. The sleeve for hose coupling and the fixing portion are screwed together and fixed by advancing the distal end side of the sleeve for hose coupling further than the distal end surface of the hose with the hose inserted. The hose coupling according to any one of 4 to 4. A hose coupling sleeve according to claim 1, and a hose coupling according to any one of claims 2 to 5,
The hose joint structure is characterized in that the hose joint sleeve is rotated along the outer peripheral surface of the hose inserted into the hose joint, and the hose is clamped and fixed between the hose joint by advancing the female screw. body.

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