JP3791671B2 - Combined hose and method for winding combined hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combined hose configured by combining a plurality of hose bodies.
[0002]
[Prior art]
A combined hose formed by connecting a plurality of hose bodies in the length direction, for example, a twin hose, is usually always provided with a plurality of hoses constituting separate fluid flow paths (for example, a hydraulic supply flow path and a hydraulic return flow path). When handled as a set, these hoses are integrated to improve handling of the hoses. For example, a hydraulic cylinder that drives a jib attached to the tip of a telescopic boom of a crane vehicle is operated by two hydraulic hoses, which are fed out from the hose reel at the same speed, And since it winds at the same speed, a twin hose is often used for the hydraulic hose for a jib drive.
[0003]
In order to manufacture such a twin hose, a method in which the outer surface side integrally forms a resin-made twin hose using extrusion molding, a method in which the resin-made outer surfaces of separately formed hose bodies are bonded with an adhesive, and For example, as described in Japanese Patent Application Laid-Open No. 62-13890, a method of thermally fusing the resin outer surfaces of hose bodies formed separately is used. However, there is an advantage that a twin hose can be manufactured at a low cost without requiring a larger apparatus than when extrusion is used, but it is difficult to increase the bonding strength between the hose bodies. There is.
[0004]
[Problems to be solved by the invention]
Therefore, when the twin hose is wound around the hose reel, if the hose body of the adjacent layer gets stuck in the valley of the layer with the twin hose and the tensile force acts on the joint portion, the joint portion is repeated. May peel off. If the joint portion is peeled off, for example, if the groove of the hose reel is thin, the twin hose can be smoothly wound, and the outer surface side layer may be peeled off from either hose body. Furthermore, for example, the crane jib is not operated only when the telescopic boom is fully extended, so the twin hose connected to the hydraulic cylinder that operates the jib is wound around the hose reel in a stacked manner Thus, the hydraulic pressure from the hydraulic source or the hydraulic cylinder is received. The twin hose is pulled and stretched somewhat when wound on the hose reel, and when pressurized, the hose body expands and at the same time tries to shrink to its original length. When the hose body of the adjacent layer is located and stuck, a large force for separating the hose body acts, and a large tensile force is applied to the joint portion. If a large tensile force is applied to the joint portion, the hose body peels off early.
[0005]
By the way, as shown in FIG. 6, when the hose reel A is used in such a way that the distance between the side plates B is slightly larger than the width of the twin hose C, the valley of the twin hose C wound in a laminated form is used. Although it is possible to avoid the hose body E from being fitted and positioned in the part D (a), when the hydraulic pressure is applied to the twin hose C in this state, the twin hose C is slightly swollen. For example, the second layer twin hose (twin hose part) C from the inner side (lower side of the figure) is a side plate B (the left side plate in the figure: the right side plate is deformed because a drive mechanism (not shown) is attached) (B), the hose body E of this layer bites into the valley portion D of the innermost twin hose C, and the joint portion F is pulled strongly. Being peeled It becomes Rukoto. Therefore, a means for protecting the twin hose is required.
[0006]
Therefore, the present invention provides a coupling hose that can be manufactured at a relatively low cost and that does not exert an excessive tensile force on the coupling portion when the hose reel is wound, and a method for winding such a coupling hose around the hose reel. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the coupling hose of the present invention (which is used by being wound in multiple layers on a hose reel) is a coupling hose (for example, a twin hose) constituting separate hydraulic flow paths, A plurality of (for example, a pair of) hose bodies whose outer surfaces are made of resin are joined in close contact with the outer surface of the combined hose body (for example, a twin hose body) in which the outer surfaces of the combined hose bodies are connected in parallel by the connection between the outer surfaces. A cover member made of an elastic material, wherein the coupling hose body is configured by joining the plurality of hose bodies formed separately from each other along the length direction of the plurality of hose bodies, The member has a gap with the coupling hose body at the valley position of the coupling hose body, and is provided so as to be able to bend in the valley. The joining of the plurality of hose bodies is performed, for example, by adhesion or heat fusion. The cover member is interposed between the hose body and the valley portion of the combined hose body of the adjacent layer, and prevents the hose body from deeply entering the valley portion. Therefore, a large pulling force does not act between the hose bodies of the coupling hose body. Moreover, the tightening force which acts on a coupling hose main body from a cover member prevents that a hose body leaves | separates. A tube made of an elastic material having an appropriate length can be used as a cover member, and the tube can be covered with the tube hose body or the tube can be covered with the tube. In addition, a long body made of an elastic material having an appropriate length (usually having a width longer than the outer periphery of the coupled hose body) is used as a cover member, wrapped around the coupled hose body, or wrapped and covered. A coupling hose can also be constructed. Furthermore, a band member (tape) made of an elastic material having an appropriate length is used as a cover member, and the band member is spirally wound around the bond hose body, or the combined hose is wound in a spiral state. You can also.
[0008]
It is sufficient that the cover member is provided only in a portion wound around or wound around the hose reel of the coupling hose body.
[0009]
The cover member is preferably a heat shrinkable tube formed in a cylindrical shape. If the cover member is a cylindrical heat-shrinkable tube, prepare a heat-shrinkable tube with a diameter larger than that of the combined hose body, insert the combined hose body into this heat-shrinkable tube, and then heat the heat-shrinkable tube. The cover member can be firmly attached to the coupling hose body without using an adhesive or the like by a simple process of contracting and closely contacting the outer surface of the coupling hose body. A more specific manufacturing method of a combined hose when using a cylindrical heat-shrinkable tube as a cover member is a combined hose main body (at least on the outer surface side) in which a plurality (for example, a pair) of hose bodies are connected in parallel. For example, a manufacturing method of a combined hose (for example, a twin hose) that is used in a multi-winding manner on a hose reel, the step of forming the plurality of hose bodies separately, and the plurality of hoses Forming a coupled hose body (for example, a twin hose body) by joining the outer surfaces along the length direction in parallel to form a coupled hose body (for example, a twin hose body), and a tubular tube having a larger diameter than the coupled hose body Inserting the coupling hose body into the heat shrinkable cover, and heating the heat shrinkable cover to sequentially contract from one end side to the other end side. A step of adhering to the outer surface of the body may be comprised of. Another advantage of using a cylindrical heat-shrinkable tube as the cover member is that the cover portion can be constructed without causing a step or seam apart from the end. For example, the seam when the tape is wound spirally without gaps may rub against the adjacent layer when wound on a hose reel, so if there is a seam on the cover (step difference) The cover member may be damaged at an early stage, but such inconvenience does not occur when a cylindrical heat-shrinkable tube is used.
[0010]
By the way, if a cover member is provided on the entire portion of the hose reel wound around the hose reel, the thickness when the hose is wound around the hose reel becomes too large to fit in the existing hose reel. In some cases, it is necessary to prepare a reel, and since a large amount of cover member material is required, the manufacturing cost of the coupling hose increases. However, the tensile force applied to the joint portion of the joint hose is large in the inner layer of the hose reel, but not so great in the outer layer. Therefore, the present invention relates to a combined hose reel device including a combined hose and a hose reel around which the combined hose is wound in multiple layers. The combined hose has at least a plurality of hose bodies made of resin on the outer surface side in parallel by coupling the outer surfaces. And a cover member made of an elastic material that is tightly covered or wound around the outer surface of the combined hose body, and each of the combined hose bodies is formed separately. A plurality of hose bodies are configured by joining outer surfaces along the length direction, and the cover member has a gap with the coupling hose body at a valley position of the coupling hose body, When the amount of winding of the combined hose around the hose reel is maximized, the innermost layer of the combined hose body starts from the innermost layer. As reach between layers, it may be configured as what is or wrapped over the portion wrapped around the hose reel of the coupling hose body. In some cases, the cover member is coupled so that it is located only in the innermost layer of the coupling hose (including the case where it is precisely located only in the innermost layer and the case where it is located slightly on the second layer from the inside). Attach to the hose body.
[0011]
Therefore, in the present invention, the coupling hose is wound around a hose reel having a winding core and a pair of side plates, and the coupling hose is wound around the multilayer. A hose body coupled in parallel by coupling of outer surfaces, and a cover member made of an elastic material that is covered or wound tightly on the outer surface of the coupled hose body. The hose main body is configured by joining the plurality of hose bodies formed separately from each other along the length direction of the plurality of hose bodies, and the cover member is connected to the coupling hose at the valley position of the coupling hose main body. It has a gap with the main body so that it can be bent in the valley, and is covered or wrapped around a portion of the combined hose main body that wraps around the core portion of the hose reel. Have been, the cover member so as to be located only in the innermost layer of the coupling hose winds the coupling hose to the winding core portion, method of winding a binding hose is provided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIGS. 1 and 2 are diagrams schematically illustrating a manufacturing process of a twin hose according to the present invention, FIG. 1 is a diagram illustrating a process of forming a twin hose body, and FIG. 2 is a diagram illustrating a twin hose body and a cover member. It is a figure explaining the formation process of the twin hose.
[0014]
First, a pair or two hose bodies 1 and 1 formed separately are prepared. Then, the two hose bodies 1, 1 are welded by passing through the welding device 3. The welding device 3 has a pair of drive rollers 5 and 5, and the distance between the drive rollers 5 and 5 is set slightly narrower than the combined width of the two hose bodies 1. A round bar-shaped hot plate 7 is arranged in front of the drive rollers 5 and 5, and one hose body 1 comes into contact with the hot plate 7 from one side of the hot plate 7 and is drawn between the drive rollers 5 and 5. The other hose body 1 comes into contact with the hot plate 7 from the other side of the hot plate 7 and is drawn between the drive rollers 5 and 5. When the drive rollers 5 and 5 are rotated (see the rotation arrow), the hose bodies 1 and 1 move forward (see the progress arrow), but the inside of each of the hose bodies 1 and 1 is a hot plate 7 heated to about 400 degrees. The hose bodies 1 and 1 are sequentially joined because they are passed through the drive rollers 5 and 5 and pressed in a melted state in contact with each other. In this way, the outer surfaces of the hose bodies 1 and 1 are joined along the length direction leaving both ends, and the twin hose body 9 in which the pair of hose bodies 1 and 1 are coupled in parallel is configured.
[0015]
Next, a tube-shaped tubular heat shrinkable cover member 11 having a larger diameter than the twin hose body 9 is prepared, and the twin hose body 9 is inserted into the cover member 11. The cover member 11 is disposed with respect to the twin hose body 9 so that the rear end substantially coincides with the position of the joining start end 13 on the rear end side of the twin hose body 9 (a). For the cover member 11, a rubber material such as ethylene propylene rubber (EP rubber) or nitrile butadiene rubber (NBR), or polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyolefin resin, or the like is used. it can. PP, PE, PVC, and polyolefin resins have excellent heat shrinkability and good processability, and EP rubber and NBR have excellent heat shrinkability and good workability, as well as flexibility. Although it is preferable as a material for the cover member 11, an ethylene-propylene-diene terpolymer rubber (EPDM) having excellent heat shrinkability, good workability, and excellent flexibility, weather resistance and heat resistance. It is effective to use as a material. Subsequently, the cover member 11 is heated and contracted sequentially from the rear end side toward the front end side, and is tightly covered with the twin hose body 9 (b). Then, the cover member 11 is heated and shrunk to the front end, and the cover member 11 is brought into close contact with the twin hose body 9 as a whole, and then the connection fittings 13 and 13 are attached to form the twin hose 15 (c).
[0016]
FIG. 3 is a perspective view showing a state in which the twin hose 15 is wound around a hose reel, FIG. 4 is a diagram schematically showing a state in which the twin hose 15 is wound, and FIG. 5 shows a state in which the twin hose 15 is pressed under pressure. FIG.
[0017]
The hose reel 17 has the same configuration as the hose reel A, and is rotatably attached to, for example, a crane truck. The twin hose 15 is attached to a connection portion (not shown) provided in the core portion 19 of the hose reel 17 and connected to the hydraulic holes 23 and 23 of the support shaft 21 in the hose reel 17. The twin hose 15 and the hose reel 17 constitute a twin hose reel device 25 (supply hose reel device). The twin hose 15 extending outward from the hose reel 17 extends to, for example, a jib along the telescopic boom, and is connected to a cylinder that drives the jib.
[0018]
The twin hose 15 is wound up to about 18 turns around the hose reel 17 (at the time of winding), but the cover member 11 extends from the first layer (innermost layer) to the third layer. In some cases, the cover member 11 is provided only on the first layer, and an increase in the width and thickness of the twin hose 15 is suppressed as much as possible. The cover member 11 preferably has a thickness of 1 mm to 4 mm. If the thickness of the cover member 11 is less than 1 mm, the strength sufficient to apply the necessary tightening force to the twin hose 15 cannot be secured, and the hose body 1 considerably bites into the valley portion 27 of the twin hose body 9 of the adjacent layer. On the other hand, if the thickness of the cover member 11 exceeds 4 mm, the twin hose 15 cannot be smoothly wound between the side plates 29 (B) set slightly wider than the width of the twin hose body 9.
[0019]
Each of the hose bodies 1 of the twin hose 15 has a three-layer structure of an inner layer 31 made of nylon, an intermediate layer 33 made of fiber, and an outer layer 35 made of polyurethane, and is formed to have an outer diameter of about 17 mm. (Thus, the width of the twin hose body 9 is about 34 mm). Since the rear end side of the twin hose 15 has a configuration in which the outer side of the twin hose body 9 is covered with the cover member 11, the width is wider by the thickness of the cover member 11 than the conventional twin hose. Therefore, for example, in order for the hose body 1 portion of the second layer to move to the position of the valley portion 27 of the first layer, the side plate 29 has to be deformed considerably greatly, so that the hose body 1 portion fits into the valley portion 27. The possibility of being a position is relatively low. Moreover, even if it becomes a position where the hose body 1 part fits into the trough portion 27, the hose body 1 does not bite into the trough portion 27 due to the thickness of the cover member 11 (state shown in FIG. 5). Further, even if the hose body 1 portion presses the respective hose body 1 portions of the first layer in the outward direction, a large tensile force does not act on the joint portion 37 due to the tightening force of the cover member 11.
[0020]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a coupling hose that can be manufactured at low cost and has excellent coupling strength, and an effective winding method for such a coupling hose.
[Brief description of the drawings]
FIG. 1 is a diagram schematically illustrating a manufacturing process of a twin hose according to the present invention, and is a diagram illustrating a process of forming a twin hose body.
FIG. 2 is a diagram schematically illustrating a manufacturing process of a twin hose according to the present invention, and a diagram illustrating a process of forming a twin hose from a twin hose body and a cover member.
FIG. 3 is a perspective view showing a state where a twin hose is attached to a hose reel and wound.
FIG. 4 is a diagram schematically showing a wound state of a twin hose.
FIG. 5 is a diagram showing a pressing state of a twin hose under pressure.
FIG. 6 is a diagram for explaining a case where a joint portion of a twin hose is peeled off.
[Explanation of symbols]
1 Hose body 9 Twin hose body (joint hose body)
11 Cover member 15 Twin hose (joint hose)
17 hose reel

Claims (3)

A combined hose that constitutes separate hydraulic flow paths,
A combined hose body having at least a plurality of hose bodies made of resin on the outer surface side and connected in parallel by coupling of the outer surfaces;
A cover member made of an elastic material covered in close contact with or wound around the outer surface of the coupling hose body,
The coupling hose body is configured by joining the plurality of hose bodies formed separately, along the length direction of the outer surfaces,
The said cover member has a clearance gap with this coupling hose main body in the valley position of the said coupling hose main body, It is provided so that it can bend in the said valley part, The coupling hose characterized by the above-mentioned.   The combined hose according to claim 1, wherein the cover member is a heat-shrinkable tube formed in a cylindrical shape. A method for winding a combined hose, in which a combined hose is wound in multiple layers on a hose reel having a winding core and a pair of side plates,
The coupling hose includes a coupling hose body in which a plurality of hose bodies having at least an outer surface side made of resin are coupled in parallel by coupling the outer surfaces, and an elastic material that is covered or wound tightly on the outer surface of the coupling hose body A cover member made of,
The coupling hose body is configured by joining the plurality of hose bodies formed separately, along the length direction of the outer surfaces,
The cover member has a gap with the coupling hose body at the valley position of the coupling hose body, and can be bent in the valley part to the core portion of the hose reel of the coupling hose body. It is put on or wrapped around the winding part,
The coupling hose winding method, wherein the coupling hose is wound around the core portion so that the cover member is located only in the innermost layer of the coupling hose.

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