Tip hose

Abstract

To reduce weight of a tip hose.SOLUTION: A tip hose 10 according to the present invention is provided via a taper pipe in a docking hose 3 connected to a pump 2 for pumping ready mixed concrete. The tip hose 10 comprises a first cylindrical part 11 which is provided at a base end and which is diameter-reduced toward a tip side, and a second cylindrical part 12 which is provided in the tip side of the first part 11 and which has a constant diameter. At least a radial outside of the first part 11 is made of cylindrical rubber.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tip hose that is attached via a tapered pipe to a docking hose that is connected to a pump that pumps ready-mixed concrete. [Background technology]

[0002] Paragraph 0006 of the specification of Patent Document 1 discloses a tapered hose for pumping ready-mixed concrete, which has a rubber hose tapered over its entire length and first and second connection flanges with different inner diameters provided on both sides of the rubber hose. Referring to paragraph 0016 of the specification of Patent Document 1, the length of the rubber hose is approximately 3 m.

[0003] Furthermore, paragraph 0003 of the specification of Patent Document 1 discloses an iron tapered pipe that narrows a 5-inch (5B) hose to a 4-inch (4B) hose. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3126341 Summary of the Invention [Problem to be solved by the invention]

[0005] Hoses for pumping ready-mixed concrete must have a tapered section at the tip end where the diameter is smaller than the base end to compensate for the loss of pressure (pressure loss) of the pumped ready-mixed concrete. If a tapered rubber hose with a tapered shape along its entire length is used as such a tapered section, it becomes difficult to identify the location of the blockage if the ready-mixed concrete clogs inside. For this reason, it is common to use an iron tapered pipe as the tapered section and connect the end hose to it. In this case, to further reduce the diameter of the tapered section, the end hose is often provided with an additional tapered section at the connection point with the iron tapered pipe, and this additional tapered section is often made of iron. However, iron hoses are heavy, which can cause problems with workability.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to reduce the weight of the end hose. [Means for solving the problem]

[0007] The first invention relates to a tip hose that is attached via a tapered tube to a docking hose that is connected to a pump that pumps ready-mixed concrete. This tip hose has a cylindrical first section whose inner diameter decreases toward the tip and whose axial length is 2 m or less, and a cylindrical second section that is attached to the tip of the first section and has a constant inner diameter, and at least the radially outer side of the first section is made of cylindrical rubber.

[0008] In the tip hose of the first invention, at least the radially outer side of the first section (reduced diameter section) is made of tubular rubber, making it lighter in weight than conventional tip hoses in which the entire reduced diameter section is made of iron.

[0009] The second invention relates to a tip hose according to the first invention, wherein the first part has a cylindrical rubber part provided on the radially outer side and a rigid reinforcing part provided on the radially inner side and configured in a plate shape extending along the axial direction of the cylinder.

[0010] The tip hose of the second invention has a first part that has a rubber part and a rigid reinforcement part, so that the rubber part reduces the weight, while the reinforcement part maintains the shape of the reduced diameter part so that the reduced diameter part does not deform due to the influence of external pressure, etc.

[0011] A third invention relates to a tip hose according to the second invention, wherein the reinforcing portion has a tubular portion fixed to the base end side of the rubber portion and a plurality of plate portions extending from the tubular portion along the inner surface of the rubber portion toward the tip side of the rubber portion, and the plurality of plate portions are arranged at intervals from each other in the circumferential direction of the tubular portion.

[0012] In the tip hose according to the third aspect of the present invention, the reinforcing portion has multiple plate portions extending along the axial direction of the tube, and these multiple plate portions are spaced apart from one another around the circumference of the tube, so the weight of the reinforcing portion can be reduced by the amount of space provided, thereby further reducing the weight of the tip hose. [Effects of the Invention]

[0013] According to the present invention, the weight of the tip hose can be reduced. [Brief explanation of the drawings]

[0014] [Figure 1] 3 is a schematic diagram showing a state in which the tip hose according to the embodiment is used. FIG. [Figure 2] FIG. [Figure 3] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described.

[0016] Figure 1 shows a pump vehicle 1, a pump 2 mounted on the pump vehicle 1 for pumping ready-mixed concrete, and a docking hose 3 connected to the pump 2 via a metal pipe. In the following description, the "base end side" means the side closer to the pump 2, and the "tip side" means the side farther from the pump 2 (the tip side of the hose).

[0017] The pump vehicle 1 is equipped with a boom 4 for lifting the docking hose 3 upward. The piping is integrated with the boom 4. The dimensions of the docking hose 3 are not particularly limited, but generally, the length is 1 m or more and 6 m or less, and the inner diameter is 100 mm or more and 130 mm or less.

[0018] A tapered tube 5 made of metal (for example, iron) and configured in a substantially cylindrical shape is attached to the tip of the docking hose 3. A base end flange 5a and a tip end flange 5b are provided at the base end and tip end of the tapered tube 5, respectively, which protrude radially outward along the entire circumference. The inner and outer diameters of the tapered tube 5 decrease toward the tip along the cylindrical axis direction (longitudinal direction). The dimensions of the tapered tube 5 are not particularly limited, but the length is between 0.5 m and 3 m.

[0019] A tip hose 10 according to this embodiment is attached to the tip side of the docking hose 3. Fig. 2 shows the tip hose 10. The overall length of the tip hose 10 is not particularly limited, but is preferably 3 m or more and 10 m or less.

[0020] The base end of the tip hose 10 is provided with a substantially cylindrical first section 11 and a substantially cylindrical second section 12 extending in the longitudinal direction of the tip hose 10 on the tip side of the first section 11. The first section 11 is configured so that its inner diameter gradually decreases toward the tip side. The length of the first section 11 in the cylindrical axis direction is 2 m or less, preferably 1.2 m or less, and more preferably 0.4 m or more and 0.8 m or less. In addition, the dimensions of the first section 11 are not particularly limited, but it is preferable that the inner diameter of both the largest and smallest parts be 75 mm or more and 130 mm or less. The thickness of the first section 11 is not particularly limited, but is preferably 2 mm or more and 20 mm or less.

[0021] The second section 12 is configured to have a constant diameter along the cylindrical axis direction. The dimensions of the second section 12 are not particularly limited, but the length along the cylindrical axis direction is preferably 3 m or more and 10 m or less.

[0022] A cylindrical rubber portion 13 is provided on the radially outer side (outer periphery side) of the first portion 11, and a reinforcing portion 14 made of metal such as iron is provided on the radially inner side (inner periphery side) of the first portion 11. The rubber portion 13 surrounds the outer periphery over the entire axial direction of the tube except for the base end of the reinforcing portion 14 (specifically, the base end 15a of the tubular portion 15 described below), and further extends from the tip end of the reinforcing portion 14 along the longitudinal direction to the tip end (not shown) of the tip hose 10. In other words, the rubber portion 13 extends over substantially the entire tip hose 10 except for the base end 15a of the tubular portion 15 of the reinforcing portion 14, and the entire second portion 12 is composed of the rubber portion 13. The rubber portion 13 includes reinforcing fibers, steel wires, etc., partially or entirely. Note that the rubber portion 13 does not need to be configured uniformly over the entire length of the second portion 12.

[0023] The thickness of the rubber portion 13 is not particularly limited, but is preferably 2 mm or more and 20 mm or less. The material of the rubber portion 13 is not particularly limited, but is preferably natural rubber (NR), styrene butadiene rubber (SBR), butadiene rubber (BR), etc.

[0024] As shown in FIGS. 2 and 3 , the reinforcing portion 14 has a tubular portion 15 embedded in the rubber portion 13 on the base end side of the rubber portion 13 or fixed (anchored) to the inner periphery of the rubber portion 13, and a plurality of plate portions 16 extending from the tubular portion 15 to the tip side along the inner circumferential surface of the rubber portion 13. The number of plate portions 16 is not limited, but is, for example, four as shown in FIG. 3 . The overall length of the tubular portion 15 in the axial direction is not particularly limited, but is preferably 0.02 m or more and 0.1 m or less. The outer diameter of the tubular portion 15 at the base end 15 a may be larger than the outer diameter of the portion other than the base end 15 a, and as shown in FIG. 2 , the tubular portion 15 is exposed from the base end side of the rubber portion 13. The plurality of plate portions 16 are arranged at intervals from one another in the circumferential direction of the tubular portion 15.

[0025] The plate portions 16 have both plate surfaces facing radially inward and outward, respectively, and are embedded in or fixed to the rubber portion 13. The dimensions of the plate portions 16 are not particularly limited, but the length along the axial direction of the cylinder is preferably 0.05 m to 1 m, the plate width is preferably 5 mm to 30 mm, and the plate thickness is preferably 0.5 mm to 10 mm. The interval between adjacent plate portions 16 in the circumferential direction is not particularly limited, but is preferably 10 mm to 30 mm.

[0026] (Actions and Effects of the Embodiments) Conventionally, the first section 11 serving as the reduced diameter section has been made entirely of iron. In contrast, in the tip hose 10 according to this embodiment, at least the radially outer side of the first section 11 is made of tubular rubber, making it possible to reduce the weight compared to conventional reduced diameter sections made entirely of iron.

[0027] Furthermore, the inner diameter of the tip hose 10 is not reduced along the entire axial direction of the tube, and the first part 11 where the diameter is reduced is only 2 m or less in length, so if fresh concrete becomes clogged inside, it is easy to identify the clogged part.

[0028] Furthermore, in the tip hose 10 according to this embodiment, the first section 11 has a rubber section 13 and a rigid reinforcing section 14, so that the weight is reduced by the rubber section 13, while the reinforcing section 14 can maintain the shape of the reduced diameter section so that the reduced diameter section does not deform due to the influence of external pressure, etc.

[0029] Furthermore, in the tip hose 10 according to this embodiment, the reinforcing portion 14 has a plurality of plate portions 16 extending along the axial direction of the tube, and these plurality of plate portions 16 are arranged at intervals from one another in the circumferential direction of the tube portion 15, so the intervals make it easier to reduce the weight of the reinforcing portion 14. Therefore, the weight of the tip hose 10 can be further reduced.

[0030] Furthermore, the tip hose 10 of this embodiment has a tubular portion 15 in which the reinforcing portion 14 is embedded in or fixed to the rubber portion 13 at the base end, and the plate portion 16 extends from the tubular portion 15 toward the tip end, so that the plate portion 16 is stably fixed to the rubber portion 13 by the tubular portion 15, and the ready-mixed concrete flowing inside is more likely to flow toward the tip end.

[0031] (Modification of the embodiment) In the embodiment described above, an example in which the reinforcing portion 14 has four plate portions 16 as shown in Fig. 3 has been shown, but the number of plate portions 16 may be an odd number of three or more. When the number of plate portions 16 is an odd number of three or more, it becomes easier to position one plate portion 16 on the opposite side (diametrically opposing side) of the other plate portion 16, which tends to increase the strength of the reinforcing portion 14. In particular, it is preferable that the number of plate portions 16 is five.

[0032] (Other embodiments) The present invention is not limited to the configuration of the above embodiment, and may be modified as follows, for example.

[0033] The first portion 11 may not have the reinforcing portion 14. The entire first portion 11 may be made of tubular rubber.

[0034] The reinforcing portion 14 is not limited to the configuration shown in FIG. 3, but may have any configuration as long as it has a plate-like portion extending along the cylindrical axis direction.

[0035] 3, the number of plate portions 16 is not limited to four. The number of plate portions 16 is preferably plural, but may be one.

[0036] The first portion 11 is not limited to the configuration of FIG. 2 in which the inner diameter gradually decreases from the base end side to the tip end side, but may have an inner diameter that decreases in a stepwise manner from the base end side to the tip end side.

[0037] The reinforcing portion 14 is not limited to being made of metal as long as it has rigidity. For example, the reinforcing portion 14 may be made of resin, or may contain chemical fibers, short fibers, various nanofibers, etc. for reinforcement. [Industrial Applicability]

[0038] INDUSTRIAL APPLICABILITY The present invention is useful as a tip hose that is attached via a tapered pipe to a docking hose that is connected to a pump that pumps ready-mixed concrete. [Explanation of symbols]

[0039] 1. Pump truck 2 pumps 3 Docking Hose 4. Boom 5 Tapered pipe 5a Base end flange 5b Tip flange 10 Tip hose 11 Part 1 12 Part 2 13 Rubber part 14 Reinforcement 15 Cylinder 15a Base end of cylindrical portion 16 Board part

Claims

1. A tip hose that is provided via a tapered pipe to a docking hose connected to a pump that pumps ready-mixed concrete, a cylindrical first portion having an inner diameter that decreases toward a tip side and a length in a cylindrical axis direction of 2 m or less; a cylindrical second section having a constant inner diameter and provided at the tip side of the first section; wherein at least a radially outer portion of the first portion is made of cylindrical rubber.

2. The tip hose according to claim 1, The first part comprises: a cylindrical rubber portion provided on the radially outer side; a reinforcing portion having rigidity and configured as a plate extending along the cylindrical axis direction and provided on the radially inner side; A tip hose having a

3. The tip hose according to claim 2, The reinforcing portion is a cylindrical portion fixed to a base end side of the rubber portion; a plurality of plate portions extending from the cylindrical portion along an inner circumferential surface of the rubber portion toward a tip end of the rubber portion; wherein the plurality of plate portions are arranged at intervals from one another in the circumferential direction of the cylindrical portion.

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