JP2001050454A - Hose clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve hose connection airtightness by winding spacers on helically reinforced hoses so that the helical recess of the helically reinforced hoses faces a helical projection of the spacers over at least one pitch, and diametrally constricting the spacers with locking bands tightened thereon so that both helical projection and helical recess of the helically reinforced hoses are pressed against the periphery of hose nipples over at least one pitch. SOLUTION: Tightening locking bands 3 into a position with a reduced diameter constricts diameter constricting cutout parts 4c of a spacer 4 to put a helical projection 4b at a closer pitch, so that the tip of the helical projection 4b fits under pressure in a helical recess 2c of a helically reinforced hose 2 practically uniformly over at least one pitch thereof, and a helical groove 4a conforms under pressure to a helical projection 2b of the helically reinforced hose 2 uniformly over at least one pitch thereof. Both helical projection 2b and recess 2c of the helically reinforced hose 2 are pressed against the periphery of a hose connecting barrel 1a of a hose nipple 1 over at least one pitch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose fastener for connecting and preventing a spiral reinforcing hose having a hard reinforcing wire projecting spirally to the outer periphery. More specifically, the present invention relates to a hose fastener in which a spiral reinforcing hose is inserted into an outer peripheral surface of a hose nipple, and a tightening band which is constantly pressed toward the hose nipple is attached to the outer periphery of the spiral reinforcing hose.

[0002]

2. Description of the Related Art Conventionally, this type of hose tightening device has a spiral reinforcing hose mainly composed of a hard reinforcing wire by winding a tightening band formed of a band-shaped flat band around a connection end of a spiral reinforcing hose and tightening the tightening band. In some cases, the inner peripheral surface portion of the convex portion is pressed against the outer peripheral surface of the hose nipple. In addition, a wire is wound along a spiral concave portion made of a soft synthetic resin formed between the spiral convex portions of the spiral reinforcing hose, and the inner peripheral surface portion of the spiral concave portion is mainly hosed by tightening the wire. Some nipples are pressed against the outer peripheral surface.

[0003]

However, in such a conventional hose fastener, either the inner peripheral surface of the spiral convex portion or the inner peripheral surface of the spiral concave portion is arranged. Since only one of them can be pressed against the outer peripheral surface of the hose nipple, the airtightness is poor, and there is a problem that if the internal pressure of the fluid passing through the helical reinforcing hose increases, fluid leakage or hose detachment may occur.

An object of the present invention is to improve airtightness. Claim 2
The invention described in addition to the object of the invention described in claim 1,
It is an object of the present invention to make the diameter of the spacer more easily contracted and to uniformly press the spiral reinforcing hose. The third aspect of the present invention has the object of facilitating the tightening operation of the tightening band in addition to the object of the first or second aspect of the present invention. The invention described in claims 4 and 5 has the object of the invention described in claim 1 or 2,
It is intended to enable use of a ready-made tightening band.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a helical convex portion made of a hard reinforcing wire is fitted to an outer peripheral surface of a helical reinforcing hose. A spiral groove and a spacer provided with a spiral projection fitted to a spiral concave portion formed between the spiral convex portions are wound around at least one pitch of the spiral convex portion and the spiral concave portion. A plurality of notch portions for radial contraction are formed in the spiral protrusion at appropriate intervals in the circumferential direction, and a tightening band is attached to the flat outer surface of the spacer, so that at least one pitch of the spiral convex portion and the spiral concave portion is provided. Is pressed toward the hose nipple. According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a plurality of notch portions for reducing diameter are formed on the outer surface of the spacer at appropriate intervals in the circumferential direction. According to a third aspect of the present invention, in the configuration of the first or second aspect, a spacer is attached to the inner peripheral surface of the tightening band so as to be immovable at least in the axial direction of the helical reinforcing hose. It is characterized in that a configuration is provided in which spiral projections and notches for radial contraction are alternately provided on the surface. According to a fourth aspect of the present invention, in the configuration of the first or second aspect of the present invention, the spacer is formed in a bendable strip shape, and spiral projections and cutouts for radial contraction are alternately provided on one surface thereof. A feature is added. According to a fifth aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, the spacer is formed in a ring shape, and a spiral projection and a notch for radial contraction are alternately provided on an inner peripheral surface thereof. It is characterized by having.

[0006]

According to the first aspect of the present invention, at least one of the spiral convex portions is provided.
The spacer is wound so that the spiral groove faces the pitch or more and the spiral protrusion faces the at least one pitch of the spiral concave portion, and the tightening band is tightened to reduce the diameter in this state, so that the notch for reducing the diameter of the spacer is formed. And the spiral protrusions are brought closer to each other, and at least one pitch or more of the spiral recesses of the spiral reinforcing hose, the tip of the spiral protrusion is fitted and pressed substantially uniformly, and the spiral shape of the spiral reinforcing hose is reduced. The helical groove is uniformly fitted and pressed against at least one pitch of the convex part, and as a result, at least one pitch of the helical convex part of these helical reinforcing hoses and at least one pitch of the helical concave part are formed. , Respectively, are pressed against the outer peripheral surface of the hose nipple. The invention of claim 2 is
A configuration in which a plurality of notches for diameter contraction are formed on the outer surface of the spacer at appropriate intervals in the circumferential direction is added to the configuration according to claim 1, so that the notch on the outer periphery of the spacer is tightened with the tightening of the tightening band. Will shrink. According to a third aspect of the present invention, in the configuration of the first or second aspect, a spacer is attached to the inner peripheral surface of the tightening band so as not to be movable at least in the axial direction of the helical reinforcing hose, and the inner peripheral surface of the spacer is provided. Since a configuration in which spiral projections and notches for radial contraction are provided alternately has been added, the tip of the spiral projection fits into the spiral concave portion, and the spiral groove fits into the spiral convex portion. The tightening band is positioned in the axial direction of the spiral reinforcing hose via the spacer. According to a fourth aspect of the present invention, in the configuration of the first or second aspect, the spacer is formed in a bendable strip shape, and spiral projections and cutouts for radial contraction are alternately provided on one surface thereof. Was added, so that a bendable strip-shaped spacer was wound around the outer periphery of the connection end of the helical reinforcement hose and mounted, and then tightened with a tightening band of a different structure from the spacer, so that the tip of the helical projection was helically shaped. The helical groove is fitted and pressed uniformly on the helical convex part while being pressed almost uniformly onto the concave part. The invention according to claim 5 is the same as the structure according to claim 1 or 2, except that the spacer is formed in an annular shape, and a spiral projection and a cutout for radial contraction are alternately provided on the inner peripheral surface thereof. Therefore, the annular spacer is screwed into the outer periphery of the connection end of the spiral reinforcing hose and mounted, and then tightened with a tightening band having a different structure from the spacer 4 so that the tip of the spiral projection is substantially uniformly with respect to the spiral recess. The helical groove is uniformly fitted and pressed against the helical convex portion while being fitted and pressed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIGS. 1 and 2, a spiral reinforcing hose 2 in which a hard reinforcing wire 2a is helically projected to the outer periphery and embedded is inserted into the outer peripheral surface of the hose nipple 1. A tightening band 3 is attached to an outer periphery of the tightening band 3 with a spacer 4 interposed therebetween.
3 shows a case where the camera is mounted so as not to be movable in the axial direction.

The hose nipple 1 is made of a hard synthetic resin, metal, or the like. In the case of the illustrated example, the hose nipple 1 has a bamboo shoot-shaped hose connecting cylinder 1a at one end in the axial direction, and the other end is connected to another machine. For connection, a cylindrical connection tube portion 1b is protruded, and a connection portion 1c such as a screw is formed on the outer peripheral surface thereof.

The above-mentioned spiral reinforcing hose 2 has a structure in which a hard reinforcing wire 2a made of a hard synthetic resin is spirally wound around an outer peripheral surface of a hose body made of a soft synthetic resin material and integrally fixed in a manufacturing process. On the outer peripheral surface, a spiral convex portion 2b made of the hard reinforcing wire 2a protrudes, and a spiral concave portion 2c is formed between the spiral convex portions 2b.

The tightening band 3 always presses the connection end of the spiral reinforcing hose 2 toward the hose nipple 1, and uses a cylindrical flat band or a collar.
In the case of the illustrated example, a housing 3b is continuously provided at the base end of the band main body 3a, and the worm 3c pivotally mounted on the housing 3b is rotated by a tool such as a screwdriver or a spanner, so that the band main body 3a is rotated. The diameter of is shrunk and the structure is used.

The spacer 4 is formed in a strip shape from a deformable soft synthetic resin or the like, and has a spiral groove 4a having a shape fitted on the spiral convex portion 2b of the spiral reinforcing hose 2 on its inner surface.
And a spiral projection 4b fitted into the spiral recess 2c,
The spiral protrusions 2b and the spiral recesses 2c are continuously provided so as to face at least one pitch or more, preferably 1.5 or more, and the spiral protrusion 4b is provided with a notch 4c for radial contraction. A plurality is formed at appropriate intervals in the circumferential direction.
Preferably, the spiral groove 4a and the spiral projection 4b are formed of a soft synthetic resin, and in the illustrated example, the spiral projection 4b is divided into eight by the cutouts 4c. Conversely, for example, it may be divided into six parts.

Further, the outer surface 4d of the spacer 4 is
It is formed flat as shown in FIG. In the case of this embodiment, a concave portion that engages in the axial direction of the helical reinforcing hose 2 over the inner peripheral surface of the band body 3 a corresponding to the inner peripheral surface of the tightening band 3 and the outer surface 4 d of the spacer 4. And an outer surface 4d of the spacer 4 is attached to the inner peripheral surface of the band main body 3a so as to be immovable at least in the axial direction of the spiral reinforcing hose 2, or is partially fixed by a fixing means such as an adhesive. The spacer 4 is integrally assembled to the tightening band 3 by being fixed in place. In the illustrated example, two tightening bands 3 are attached to the outer surface 4d of the spacer 4 as shown in FIG. 1 (a). However, the present invention is not limited to this. For example, as shown in FIG. When it is short in the direction, the tightening band 3 may be reduced to one. The outer surface 4d of the spacer 4 cannot be moved in the axial direction of the spiral reinforcing hose 2 with respect to the inner peripheral surface of the band main body 3a, but is slidably mounted in the circumferential direction of the band main body 3a. Well. In this case, as shown in FIG. 1B, it is preferable to form a plurality of notches 4e for diameter contraction at appropriate intervals in the circumferential direction.

Next, a method of using the hose fastener will be described. First, the worm 3c of the tightening band 3
Is loosened to enlarge the diameter of the band body 3a, and the connection end of the spiral reinforcing hose 2 is inserted into the band body 3a and the spacer 4. Then, the connection end of the spiral reinforcing hose 2 is attached to the hose connection tube 1 a of the hose nipple 1.

Thereafter, the spiral groove 4a of the spacer 4 faces at least one pitch of the spiral convex portion 2b of the spiral reinforcing hose 2 and the spiral protrusion 4b of the spacer 4 is aligned with the spiral concave portion 2c of the spiral reinforcing hose 2. Is positioned so as to face at least one pitch. In this state, the worm 3c of the tightening band 3 is tightened and the band body 3a is tightened.
Shrink the diameter of

As shown in FIG. 1 (a), the notches 4c for reducing the diameter of the spacer 4 are reduced to bring the spiral projections 4b closer to each other, so that at least one pitch of the spiral recess 2c of the spiral reinforcing hose 2 is formed. As described above, the tip of the spiral projection 4b is fitted and pressed almost uniformly, and the spiral groove 4a is uniformly fitted and pressed against at least one pitch of the spiral convex portion 2b of the spiral reinforcing hose 2. Is done.

As a result, at least one pitch of the spiral convex portions 2b of the spiral reinforcing hose 2 and the spiral concave portions 2b are provided.
At least one pitch of c is pressed against the outer peripheral surface of the hose connection tube portion 1a of the hose nipple 1 to improve airtightness, and even if the internal pressure of the fluid passing through the helical reinforcing hose 2 increases, leakage of the fluid occurs. Does not occur at all, and the hose can be reliably prevented from coming off.

Further, by tightening the tightening band 3, the inner peripheral surface of the band main body 3a comes into close contact with the outer surface 4d of the spacer 4, so that when the diameter of the band main body 3a is further reduced, the outer surface of the spacer 4 responds to this radial contraction. 4d could not follow,
There is a possibility that wrinkles may be generated on the outer surface 4 d of the spacer 4, or the pressure on the spiral reinforcing hose 2 may be biased. In order to solve such a problem, the present invention provides an outer surface 4 of the spacer 4.
.. d are formed on the inner surface of the band body 3a and the outer surface 4d of the spacer 4 is slidably mounted in the circumferential direction of the band body 3a. Even if the diameter of 3a is reduced, the cutouts 4e on the outer periphery of the spacer 4 are reduced. As a result, the diameter of the spacer 4 is more easily contracted, and the helical reinforcement hose 2 can be pressed evenly, and it is possible to prevent wrinkles from occurring on the outer surface of the spacer 4 and to prevent uneven pressing of the helical reinforcement hose.

In the case of this embodiment, the tightening band 3
Since the spacer 4 is attached to the inner peripheral surface of the spiral reinforcing hose 2 so as not to be movable at least in the axial direction of the spiral reinforcing hose 2 and the two are integrally assembled, the tip of the spiral projection 4b fits into the spiral recess 2c and the spiral The tightening band 3 is positioned in the axial direction of the spiral reinforcing hose 2 via the spacer 4 by fitting the groove 4 a into the spiral convex portion 2 b. As a result, the tightening operation of the tightening band 3 is easily performed.

On the other hand, FIGS. 3 and 4 each show another embodiment of the present invention. FIG. 3 shows a spacer 4 '.
Is formed in a bendable strip shape, and a spiral projection 4 is formed on one side thereof.
b 'and the notch 4c' for diameter contraction are provided alternately.
Unlike the embodiment shown in FIGS. 1 and 2, other configurations are the same as those in the embodiment shown in FIGS. At this time, in order to prevent the tightening band 3 from being displaced in the axial direction of the spiral reinforcing hose 2 as necessary, the band main body 3 is provided on the outer surface 4d 'of the band-shaped spacer 4'.
It is preferable to provide an annular recess 4f 'around which a is fitted.

Therefore, in the one shown in FIG. 3, a bendable strip-shaped spacer 4 'is wound around the outer periphery of the connection end of the helical reinforcing hose 2 and mounted, and thereafter, the tightening band 3 having a different structure from the spacer 4' is provided. By screwing, the spiral projection 4b '
Is pressed almost uniformly into the spiral concave portion 2c, and the spiral groove 4a 'is pressed against the spiral convex portion 2b.
It is fitted and pressed uniformly. As a result, the ready-made tightening band 3
Can be used, and there is no need to use a tightening band having a special structure, which is advantageous in that costs can be reduced as compared with the embodiment shown in FIGS.

FIG. 4 shows a structure in which spacers 4 "are formed in an annular shape, and spiral projections 4b" and notches 4c "for radial contraction are provided alternately on the inner peripheral surface of the spacer 4". 2 is the same as that of the embodiment shown in Fig. 1 to Fig. 2. At this time, the outer surface 4d "of the annular spacer 4" is attached to the outer surface 4d "as necessary. Tightening band 3
To prevent the spiral reinforcing hose 2 from being displaced in the axial direction, the annular concave portion 4 into which the band main body 3a is fitted.
Preferably, f ″ is provided around.

Accordingly, in the one shown in FIG. 4, an annular spacer 4 "is screwed around the outer periphery of the connection end of the helical reinforcing hose 2 and mounted. Thereafter, the tightening band 3 having a different structure from the spacer 4" is attached.
, The tip of the spiral projection 4b "is fitted and pressed almost uniformly to the spiral concave portion 2c, and the spiral groove 4a" is uniformly fitted and pressed to the spiral convex portion 2b. . As a result, the ready-made tightening band 3 can be used, so that there is no need to use a special tightening band, and there is an advantage that the cost can be reduced as compared with the embodiment shown in FIGS.

In the example shown in FIG. 1, two tightening bands 3 are attached in the axial direction of the spiral reinforcing hose 2, and in the example shown in FIG. 2, the tightening bands 3 are attached to one. There is no limitation, and when the spacer 4 is elongated in the axial direction of the spiral reinforcing hose 2, three or more tightening bands 3 may be attached. Further, in the above-described embodiment, the spiral reinforcing hose 2 is
Although the case where the hard reinforcing wire 2a is spirally projected to the outer periphery and embedded is shown, the present invention is not limited to this, but the hard reinforcing wire 2a may be spirally exposed and projected to the outer periphery, although not shown. .

[0024]

As described above, according to the first aspect of the present invention, at least one pitch of the helical convex portion and the helical groove face each other, and at least one pitch of the helical concave portion and the helical protrusion. Wind the spacer so that
In this state, by tightening the tightening band to shrink the diameter, the notch for shrinking the diameter of the spacer is reduced to bring the spiral projections closer to each other, and the spiral is reduced with respect to at least one pitch of the spiral recess of the spiral reinforcing hose. The tips of the projections are fitted and pressed almost uniformly, and the helical grooves are pressed and fitted uniformly over at least one pitch of the helical projection of the helical reinforcement hose. Since at least one pitch of the spiral convex portion and at least one pitch of the spiral concave portion are pressed against the outer peripheral surface of the hose nipple, airtightness can be improved. Therefore, compared to the conventional one in which only one of the inner peripheral surface portion of the spiral convex portion or the inner peripheral surface portion of the spiral concave portion, which can be pressed against the outer peripheral surface of the hose nipple, the spiral reinforcing hose is used. Even if the internal pressure of the passing fluid increases, no fluid leakage occurs and the hose can be reliably prevented from coming off.

According to the second aspect of the invention, in addition to the effect of the first aspect, the notch on the outer periphery of the spacer is reduced with the tightening of the tightening band, so that the diameter of the spacer is more easily contracted, and the spiral reinforcement is provided. The hose can be pressed evenly. Therefore, it is possible to prevent wrinkles from being generated on the outer surface of the spacer and biasing of the spiral reinforcing hose from being biased due to the tightening of the tightening band.

According to a third aspect of the present invention, in addition to the effects of the first or second aspect, the tip of the spiral projection fits into the spiral concave portion and the spiral groove fits into the spiral convex portion. Accordingly, the tightening band is positioned in the axial direction of the spiral reinforcing hose via the spacer, so that the tightening operation of the tightening band can be easily performed.

According to a fourth aspect of the present invention, in addition to the effects of the first or second aspect, a bendable strip-shaped spacer is wound around the outer periphery of the connection end of the helical reinforcing hose and mounted.
By tightening the spacer with a tightening band having a different structure, the tip of the spiral projection is fitted and pressed almost uniformly to the spiral recess, and the spiral groove is uniformly fitted and pressed to the spiral projection. So that a ready-made tightening band can be used. Therefore, it is not necessary to use a tightening band having a special structure, and the cost can be reduced.

According to a fifth aspect of the present invention, in addition to the effects of the first or second aspect, an annular spacer is screwed around the outer periphery of the connection end of the spiral reinforcing hose and mounted.
By tightening with a tightening band having a different structure from the above, the tip of the spiral projection is fitted and pressed almost uniformly to the spiral concave portion, and the spiral groove is uniformly fitted and pressed to the spiral convex portion. Therefore, a ready-made tightening band can be used. Therefore, it is not necessary to use a tightening band having a special structure, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1A is a partially cutaway front view of a hose fastener showing an embodiment of the present invention, and FIG. 1B is a longitudinal side view.

FIG. 2 is an exploded perspective view showing the whole.

FIG. 3 is an exploded perspective view of a hose fastener according to another embodiment of the present invention.

FIG. 4 is an exploded perspective view of a hose fastener according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hose nipple 2 Spiral reinforcement hose 2a Hard reinforcement wire 2b Spiral convex part 2c Spiral concave part 3 Tightening band 4,4 ', 4 "Spacer 4a, 4a', 4
a "Spiral groove 4b, 4b ', 4b" Spiral projection 4c, 4c', 4c "Notch for diameter contraction 4d Outer surface 4e Notch for diameter contraction

Claims (5)

[Claims] 1. A spiral reinforcing hose (2) having a hard reinforcing wire (2a) projecting spirally around the outer periphery is inserted into the outer peripheral surface of the hose nipple (1), and the spiral reinforcing hose (2) is In a hose tightening tool having a tightening band (3) constantly pressed toward the hose nipple (1) mounted on the outer circumference, a hard reinforcing wire (2) is formed on the outer circumferential surface of the spiral reinforcing hose (2).
a) a spiral groove (4) fitted with the spiral convex part (2b)
a) and a spacer (4) provided with a helical projection (4b) fitted to a helical recess (2c) formed between the helical projections (2b). ) And the spiral recess (2c) are wound over at least one pitch, and the spiral projection (4b) is notched (4) for contracting the diameter.
c) are formed at appropriate intervals in the circumferential direction, and a tightening band (3) is attached to the flat outer surface (4d) of the spacer (4) to form a spiral convex portion (2b) and a spiral concave portion (2c). ), At least one pitch of which is pressed toward the hose nipple (1). 2. An outer surface (4d) of the spacer (4),
The hose fastener according to claim 1, wherein a plurality of notches (4e) for radial contraction are formed at appropriate intervals in the circumferential direction. 3. A spacer (4) is attached to the inner peripheral surface of the tightening band (3) so as to be immovable at least in the axial direction of the spiral reinforcing hose (2), and is spirally attached to the inner peripheral surface of the spacer (4). The hose fastener according to claim 1 or 2, wherein the projections (4b) and the notches (4c) for reducing the diameter are provided alternately. 4. The spacer (4 ') is formed in a bendable strip shape, and has spiral projections (4a') and notches (4c ') for radial contraction alternately provided on one surface thereof. Or 2
The hose fastener described. 5. The spacer (4 ″) is formed in an annular shape, and spiral projections (4a ″) and cutouts (4c ″) for radial contraction are alternately provided on an inner peripheral surface thereof. Hose fasteners.