JP2006051560A - Insertion tool of joint metal fitting into spiral reinforced hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate work to insert a connecting metal fitting into a spiral reinforced hose and to prevent the disconnection of the hose and the connecting metal fitting after insertion. <P>SOLUTION: A pair of fastening metal fittings 2 capable of fastening and fixing the spiral reinforced hose H by clamping it is provided, an insertion hole is formed by projecting and providing a bracket 3 on these fastening metal fittings, and the connecting metal fitting K is press-fitted in this insertion hole by fixing the head end side with a nut 5 by inserting a head end part of a screw shaft 4 into this insertion hole, screwing a fastening nut 7 by inserting the base end side of the screw shaft 4 into an insertion hole 6h of a presser plate 6 and advancing the presser plate 6 by fastening it with the fastening nut 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an insertion jig that is convenient when a fitting is inserted into an open end of a hose that has been reinforced in a spiral shape so as to send gas or liquid, for example, and has improved pressure resistance.

Conventionally, for example, when sucking and sending mud, sludge, mortar, etc. in civil engineering work, or supplying air, exhausting, collecting dust, etc. for indoor air conditioning, ventilation, etc., it is spirally reinforced and has pressure resistance etc. An elevated hose (see, for example, Patent Document 1) may be used, and when inserting a connection fitting (nipple) into such a spiral reinforcing hose, heat the end of the hose with hot water or the like. After softening, insert a fitting with a shaft diameter slightly larger than the inner diameter of the hose, or insert grease to reduce resistance and then insert the hose as necessary. A binding band or the like is wound around the outer periphery of the metal plate to prevent it from coming off.
Japanese Utility Model Publication No. 6-1968

However, when the end of the hose is softened by heating with hot water or the like as before, or when it is press-fitted with grease, work takes time and labor, and when softening with hot water etc. There was also a problem with work safety.
Further, the method of fixing the connection fitting and the hose integrally with a binding band or the like may cause the hose and the connection fitting to come off due to insufficient coupling force when the fluid pressure of the fluid in the hose is high.

  Accordingly, an object of the present invention is to facilitate the operation of inserting a connection fitting into a spiral reinforcing hose and to prevent the hose and the connection fitting from being disconnected after the insertion.

  In order to achieve the above object, the present invention is capable of freely inserting a pair of tightening brackets that can be clamped and fixed by sandwiching a helical reinforcing hose, a plurality of brackets protruding from the tightening brackets, and an insertion hole formed in the bracket. A plurality of screw shafts, a pressing plate in which a plurality of insertion holes through which each screw shaft can be inserted are formed, and nuts that can be screwed on the distal end side and the proximal end side of the screw shaft are provided as the pressing plate. The shape and size of the end face of the joint fitting can be pressed.

The vicinity of the end of the spiral reinforcing hose is sandwiched and fixed by a pair of clamps, and the tip of the screw shaft is inserted into the insertion hole of the bracket protruding from the clamp and the tip is fixed with a nut. Then, the base end side of the screw shaft is inserted through the insertion hole of the pressing plate. Then, lightly insert the tip of the shaft of the connection fitting into the opening of the hose, bring the base end of the connection fitting into contact with the pressing plate, screw the nut into the insertion base end of the screw shaft, and tighten the nut. When the pressing plate is moved forward, the connection fitting is pressed against the pressing plate with a strong force and is press-fitted into the hose. By such a procedure, the hose end can be smoothly inserted without the need to soften the end of the hose or apply grease.
At this time, in order to prevent the fastening bracket from being securely fixed to the hose and moving, for example, when a spiral projection protrudes from the outer periphery of the hose, the spiral that engages the spiral projection on the outer periphery of the hose It is preferable to form an engaging portion in the shape of a ring.

In the present invention, a part of the insertion jig is used as a connection jig that also serves to prevent the removal.
And, for example, if you insert the connection fitting using this insertion jig, connect the connection fittings together, and then use it as a connection jig that also prevents the removal prevention, you can reliably prevent the removal. And convenient.

A pair of tightening brackets that can be clamped and fixed by sandwiching a spiral reinforcing hose are provided, and a bracket is projected from the tightening bracket to form an insertion hole, and the distal end of the screw shaft is inserted through the insertion hole. It is fixed with a nut, the base end side of the screw shaft is inserted into the insertion hole of the pressing plate, the nut is screwed, and the pressing plate is advanced by tightening the nut on the base end side, so that the connection fitting is press-fitted In this case, the hose can be inserted with a strong force and can be inserted without softening the opening of the hose or applying grease.
Further, if the insertion jig is used as a connecting jig that also serves to prevent the removal, it is convenient because it is possible to reliably prevent the removal.

Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is an exploded perspective view of an insertion jig according to the present invention, FIG. 2 is an explanatory view of a state in which the insertion jig is mounted on a hose and a fitting is inserted, and (a) is a state at the start of insertion. FIG. 3B is a state diagram after insertion, FIG. 3 is an explanatory view of an example of a spiral reinforcing hose and a joint fitting, and FIG. 4 is an explanatory view when used as a connecting jig that also serves to prevent the removal.

In the insertion jig according to the present invention, for example, when inserting a fitting fitting (nipple) K into a spiral reinforcing hose H as shown in FIG. It can be inserted smoothly even if it is not painted, and after insertion, it can be used as a connecting jig that also serves as a prevention against disconnection.
Such a helical reinforcing hose H is generally a hard resin wound spirally or a metal wire or the like covered with a soft resin or special rubber, and the diameter is several tens of mm. There is a range from about one to several hundred mm. In this embodiment, the spiral reinforcing portion Ha protrudes from the outer surface of the hose and is convex.

  The connection fitting K is generally made of metal, but in some cases, it is made of a hard resin, and a shaft portion Kj inserted into the hose H and a plurality of connection holes are formed. The thing of the form provided with the large diameter connection part Ka made is common.

  As shown in FIG. 1, the insertion jig 1 includes a pair of fastening fittings 2 that can be fixed in a clamped manner across the outer periphery of the hose H, and a pair of protruding fittings that protrude from the surface of each fastening fitting 2. A bracket 3, a screw shaft 4 that can be inserted through an insertion hole formed in each bracket 3, a pair of front and rear nuts 5 for fixing each screw shaft 4 to the bracket 3, and each screw shaft 4 for insertion. A pressing plate 6 in which an insertion hole 6 h is formed and a tightening nut 7 that is screwed to the proximal end side of the screw shaft 4 are provided.

The clamp 2 includes a semi-cylindrical main body 2a and an overhang 2b that projects outward from both ends of the main body 2a. The overhang 2b includes both the clamp 2 A bolt insertion hole is formed when the bolt 8 and the nut 9 are fixed.
Also, a spacer ring 10 of various thicknesses through which the bolt 8 can be inserted is provided between the overhanging portion 2b and the overhanging portion 2b so that the distance between them can be adjusted. ing.
A spiral protrusion t that can be engaged with the spiral reinforcing portion Ha of the hose H is provided on the inner surface side of the main body 2a.

  The pressing plate 6 is a flat plate, and is sized so that the portion surrounded by the insertion hole 6h can be pressed against the outer surface of the connecting portion Ka of the joint fitting K.

A method of using the insertion jig 1 as described above will be described with reference to FIG.
First, as shown to Fig.2 (a), it clamps and fixes so that the hose H edge part vicinity may be clamped with a pair of clamping jigs 2. FIG. At this time, the helical protrusion t on the inner surface is engaged with the reinforcing portion Ha on the outer surface of the hose so that the tightening jig 2 does not move in the axial direction of the hose H.

  Then, after the distal end portion of the screw shaft 4 is inserted into the bracket 3 of the clamp 2, the front and rear nuts 5 are fixed to the bracket 3. Next, the tapered portion of the shaft portion Kj of the joint fitting K is inserted into the opening of the hose H, and the front surface of the pressing plate 6 inserted through the base end side of the screw shaft 4 is connected to the joint portion of the joint fitting K. The tightening nut 7 is screwed onto the screw shaft 4 while being brought into contact with the Ka end surface. When the pressing plate 6 is advanced by tightening the tightening nut 7, the joint fitting K is pressed with a strong force, and the shaft portion Kj is press-fitted into the hose H as shown in FIG. .

At this time, the tightening nut 7 may be manually rotated using a manual wrench or the like, or all of the tightening nuts 7 may be simultaneously rotated using a plurality of nut runners. When the work is performed, the plurality of tightening nuts 7 are sequentially tightened by a predetermined amount so that the joint fitting K can be smoothly inserted as long as it is not inclined from the axis.
Such a method eliminates the need to soften the end portion of the hose H with hot water or apply grease as in the prior art.
Further, several types of the insertion jig 1 may be prepared in advance according to the diameter of the hose H, for example, and the minute diameter may be adjusted by adjusting the thickness of the spacer ring 10.

By the way, after inserting the joint fitting K in the above procedure, a part of the insertion jig 1 can be used as a connection jig that also serves to prevent the removal.
That is, as shown in FIG. 4, after connecting the fittings K together, the fastening jig 2 of the insertion jig 1 is fixed to both hoses H, and is connected by the screw shaft 4 so that the nut 5 or the like is connected. If they are fixed, the connected state can be maintained while preventing both the hoses H from coming out of the fittings K.
At this time, if necessary, the spacer ring 10 between the clamps 2 is removed to firmly fix the outer periphery of the hose H.

In addition, this invention is not limited to the above embodiments. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention. For example, instead of using the tightening nut 7, a bolt type screw shaft 4 having a hexagon head at the end may be used to screw the screw shaft 4 itself and press the joint fitting K.
Alternatively, the left and right fastening fittings 2 may be connected to each other with a turnbuckle using bolt type screw shafts, and the turnbuckle may be operated. This is particularly effective when the location is restricted and the tightening nut 7 is difficult to operate.

  When inserting the fittings of the spiral reinforcing hose, it is possible to eliminate the trouble of softening the hose opening using hot water or applying grease etc. as before, improving workability, and after inserting It is convenient because it can be used as a connecting jig that also serves as a prevention against detachment.

The exploded perspective view of the insertion jig concerning the present invention It is explanatory drawing of the state which attaches this insertion jig to a hose and inserts a fitting metal fitting, (a) is a state figure at the time of insertion start, (b) is a state figure after insertion Illustration of an example of a spiral reinforcing hose and fittings Explanatory drawing when used as a connecting jig that also serves as a stopper

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Insertion jig, 2 ... Fastening metal fitting, 3 ... Bracket, 6 ... Pressing plate, 6h ... Insertion hole, 7 ... Clamping nut, H ... Spiral reinforcement hose, K ... Fitting metal fitting.

Claims (2)

A pair of tightening brackets that can be clamped and fixed by sandwiching a helical reinforcing hose, a plurality of brackets protruding from the tightening brackets, a plurality of screw shafts that can be inserted through insertion holes formed in the brackets, and each screw shaft A pressing plate in which a plurality of insertion holes can be inserted, and a nut that can be screwed to the distal end side and the proximal end side of the screw shaft, and the pressing plate can press the end face of the fitting The jig for inserting the fitting into the spiral reinforcing hose is characterized by being sized. 2. The joint jig insertion jig for a spiral reinforcing hose according to claim 1, wherein a part of the insertion jig is used as a connection jig that also serves to prevent the removal. 3.

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