Concrete transport hose

Abstract

To provide a concrete transport hose free from concrete blockage capable of preventing material separation by reducing concrete transport speed.SOLUTION: A concrete transport hose 100 is applied when placing concrete. The concrete transport hose includes: a hose body 50; a support member 61 that is attached to the hose body 50 extruding inside the hose body 50; and a hanging member 70 hanging from the support member 61. The hanging member 70 is formed of multiple endless wires 71 that are connected mutually in a rotatable manner.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a concrete transport hose.

Background Art

[0002] Conventionally, when transporting (pumping) concrete from a high place to a low place at a construction site, for example, the transport speed increases with the free fall of the concrete, and due to the impact when it falls and the collision with the inner surface of the concrete transport hose, etc., there is a problem that material separation of the concrete easily occurs.

[0003] In order to solve this problem, Patent Document 1 proposes a concrete transport pipe having a constricted portion processed into a flat shape at at least one location in the middle of the concrete transport pipe, giving the constricted portion a restoring force and an elastic force that can expand at a predetermined internal pressure or higher to have the same diameter as other parts.

[0004] On the other hand, Patent Document 2 proposes a flat hose for concrete placement having a flat portion corresponding to the constricted portion of Patent Document 1, and this flat hose for concrete placement is set so that the slump and slump flow of the concrete and the flatness ratio of the flat portion satisfy predetermined requirements.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] The concrete transport pipes and flat hoses for concrete placement described in Patent Documents 1 and 2 are designed with constrictions and flat sections in the middle, expecting the concrete to expand as it passes through these sections to the same diameter as the rest of the pipe. However, there are various types of concrete, such as ordinary concrete and fluidized concrete, which have different properties including hardness even in their fresh state. Even ordinary concrete has various differences in coarse aggregate content and water-cement ratio, resulting in a variety of types with different properties. Therefore, it is extremely difficult to set the flat sections to expand uniformly as various types of concrete are transported through them. If the flat sections do not expand as desired, the transport of concrete may be obstructed, potentially leading to concrete blockage and making placement impossible.

[0007] This invention has been made in view of the above problems, and aims to provide a concrete transport hose that does not pose a risk of concrete blockage and can reduce the transport speed of concrete to suppress material segregation. [Means for solving the problem]

[0008] To achieve the above objective, one embodiment of the concrete transport hose according to the present invention is: A concrete transport hose used during concrete pouring, The hose body and A support member that protrudes into the hose body and is attached to the hose body, It has a hanging member that hangs down from the aforementioned support member, The hanging member is characterized by being formed by a plurality of endless wires being connected to each other in a manner that allows for rotation.

[0009] According to this embodiment, a hanging member is suspended from a support member protruding from the inside of the hose body, and since the hanging member is formed by multiple endless wire members rotatably connected to each other, when the transported concrete comes into contact with the hanging member, the hanging member rotates and reduces the transport speed of the concrete. Therefore, the transport speed of the concrete can be effectively reduced without the hanging member acting a large impact (or reaction force) on the concrete, and material segregation of the concrete can be suppressed. Furthermore, since there is no flattened section in the middle of the hose body, there is no risk of the hose body becoming blocked when transporting concrete of various properties.

[0010] Here, "hose body" includes forms formed solely from steel pipes, and unit forms of steel pipes and flexible hoses. Furthermore, "endless wire" includes linear shapes such as perfect circles (rings), track shapes, and polygonal shapes, and can be made of steel wire or rigid resin wire that has the rigidity to withstand impacts from concrete.

[0011] Furthermore, in another embodiment of the concrete transport hose according to the present invention, The support material is characterized in that it is a first support material that traverses the inside of the hose body.

[0012] According to this embodiment, since the support material is a first support material that traverses the inside of the hose body, it becomes possible to position the hanging material suspended from the first support material at or near the center of the cross-section of the hose body, thereby effectively reducing the transport speed of concrete passing through the inside of the hose body.

[0013] Furthermore, in another embodiment of the concrete transport hose according to the present invention, The aforementioned support member is a second support member that protrudes without crossing the inside of the hose body, The plurality of the second support members are attached to the inner surface of the hose body at intervals in the circumferential direction, and the hanging member hangs down from each of the second support members.

[0014] According to this embodiment, since multiple second support members, each extending outward without traversing the inside of the hose body, are attached at intervals in the circumferential direction on the inner surface of the hose body, it becomes possible to position multiple hanging members near the inner surface of the hose body, thereby effectively reducing the transport speed of concrete passing through the inside of the hose body.

[0015] Furthermore, in another embodiment of the concrete transport hose according to the present invention, The support member comprises a first support member that crosses the inside of the hose body and a second support member that protrudes without crossing the inside of the hose body. Multiple of the second support members are attached to the inner surface of the hose body at intervals in the circumferential direction, The hanging member is characterized in that it hangs down from the first support member and the second support member, respectively.

[0016] According to this embodiment, the support material includes both a first support material and a second support material, and therefore multiple hanging materials can be placed at the center of the cross-section of the hose body, its vicinity, and at multiple locations near the inner surface, thereby more effectively reducing the transport speed of concrete passing through the inside of the hose body.

[0017] Furthermore, in another embodiment of the concrete transport hose according to the present invention, The plurality of support members are attached to the hose body at intervals along its longitudinal direction.

[0018] According to this embodiment, since multiple support members are attached at intervals along the longitudinal direction of the hose body, when the length of the hose body is long, the concrete transport speed can be reduced by multiple hanging members arranged at multiple locations along the longitudinal direction of the hose body.

[0019] Here, the phrase "a plurality of support members are attached to the hose body at intervals in the longitudinal direction" includes forms in which a plurality of first support members are attached to different positions in the longitudinal direction of the hose body, forms in which a plurality of second support members are spirally attached to different positions in the longitudinal direction of the hose body, forms in which a plurality of second support members are attached in the circumferential direction of one cross-section of the hose body to form one unit, and forms in which a plurality of units are attached to different positions in the longitudinal direction of the hose body, etc.

[0020] Another aspect of the concrete transport hose according to the present invention is characterized in that a plurality of the suspended members hang down from the support member.

[0021] According to this aspect, since a plurality of suspended members hang down from the support member, the effect of reducing the concrete transport speed can be further enhanced. For example, forms in which a plurality of suspended members are suspended at intervals with respect to the first support member can be cited.

[0022] Another aspect of the concrete transport hose according to the present invention is characterized in that the support member is supported rotatably about a rotation axis inside the hose body.

[0023] According to this aspect, since the support member is supported rotatably about a rotation axis inside the hose body, not only does the suspended member rotate due to contact with the concrete, but the support member also rotates. Therefore, it is possible to effectively reduce the concrete transport speed while further reducing the impact applied to the concrete.

[0024] Also, in another aspect of the concrete transport hose according to the present invention, the hose body includes a steel pipe and a flexible hose attached to an end of the steel pipe, and the support member is attached inside the steel pipe.

[0025] According to this embodiment, the hose body comprises a steel pipe and a flexible hose attached to its end, and a support material is installed inside the steel pipe. This allows the support material from which the hanging material is suspended to be firmly attached to the rigid steel pipe, and the flexibility of the hose body is guaranteed by the flexible hose, resulting in a hose body with excellent handling properties. [Effects of the Invention]

[0026] As can be understood from the above explanation, the concrete transport hose of the present invention eliminates the risk of concrete blockage and reduces the transport speed of concrete, thereby suppressing material segregation. [Brief explanation of the drawing]

[0027] [Figure 1] This diagram illustrates a method for transporting concrete from a high place to a low place using a concrete pump truck, and shows a concrete transport hose according to the embodiment attached to the tip of the pressure pipe located at the very front of the concrete pump truck. [Figure 2A] This is a side view showing a concrete transport hose according to an embodiment, in which a first support member is attached to the steel pipe constituting the hose body, and a hanging member is hanging down from the first support member. [Figure 2B] Figure 2A is a view from the direction of arrow BB, and is a plan view of the first support member located inside the steel pipe, seen from above. [Figure 3] This is a side view of an example of a concrete transport hose according to an embodiment. [Figure 4] This figure corresponds to Figure 2B and is a plan view showing a modified example of the first support member. [Figure 5] (a) and (b) are both diagrams showing variations of the suspended material. [Figure 6A] This is a side view showing a concrete transport hose according to an embodiment, in which a second support member is attached to the steel pipe constituting the hose body, and a hanging member is hanging down from the second support member. [Figure 6B]Figure 6A is a view along the BB arrow, and is a plan view from above of the multiple second support members located inside the steel pipe. [Figure 7A] This is a side view showing a concrete transport hose according to an embodiment, in which a first support member and a second support member are attached to the steel pipe constituting the hose body, and hanging members are suspended from the first support member and the second support member, respectively. [Figure 7B] Figure 7A is a view from the direction of arrow BB, and is a plan view from above of the first support member and multiple second support members located inside the steel pipe. [Figure 8] This figure shows the appearance of a hose test specimen used in a performance test of a concrete transport hose. [Figure 9A] This figure shows the test results regarding the spread (flow) of concrete after pouring, using the hose test specimens for Examples 1 and 2 and the Comparative Example, as part of the performance test results. [Figure 9B] This figure shows the test results for the scattering rate, which is an indicator of the degree of material segregation of concrete after pouring, when using the hose test specimens for Examples 1 and 2 and the Comparative Example, as part of the performance test results. [Figure 10] (a), (b), and (c) are diagrams showing the spread of the concrete after pouring in Example 1, Example 2, and the Comparative Example, respectively. [Modes for carrying out the invention]

[0028] Hereinafter, an example of a concrete transport hose according to the embodiment will be described, along with a method for transporting concrete from a high place to a low place using a concrete pump truck, with reference to the attached drawings. In this specification and drawings, substantially identical components may be denoted by the same reference numerals to avoid redundant explanations.

[0029] [Concrete transport hose according to the embodiment] Referring to Figures 1 to 7, an example of a concrete transport hose according to the embodiment and an example of a method for transporting concrete from a high place to a low place using a concrete pump truck will be described. Here, Figure 1 is a diagram illustrating a method for transporting concrete from a high place to a low place using a concrete pump truck, and shows the concrete transport hose according to the embodiment attached to the tip of the foremost pumping pipe of the concrete pump truck. Figure 2A is a side view of the concrete transport hose according to the embodiment, showing a state in which a first support member is attached to the steel pipe constituting the hose body, and a hanging member is hanging from the first support member. Figure 2B is a view from arrow BB in Figure 2A, and is a plan view of the first support member inside the steel pipe seen from above. Furthermore, Figure 3 is a side view of an example of a concrete transport hose according to the embodiment.

[0030] First, referring to Figure 1, we will explain an example of a method for transporting concrete from a high place to a low place using a concrete pump truck.

[0031] The concrete pump truck 10 shown as an example in Figure 1 comprises a body 11, a first arm 12 mounted on the body 11 so as to be rotatable in the horizontal and vertical directions, a second arm 13 mounted on the first arm 12 so as to be rotatable, and a third arm 14 mounted on the second arm 13 so as to be rotatable. Each arm supports a pumping pipe 15, 16, and 17, and the pumping pipes 15, 16, and 17 are rotatably connected to each other while communicating with one another.

[0032] The end of the hose body 50 that makes up the concrete transport hose 100 is fitted into the tip of the pressure pipe 17 at the very front and secured by a fastener 18. The concrete transport hose 100 has a hose body 50 made up of a steel pipe 20 and a flexible hose 30, and the fixed end 31 of the flexible hose 30 is fitted into the end of the steel pipe 20 and secured by a fastener 40 such as binding wire.

[0033] Meanwhile, the nozzle 32 of the flexible hose 30 extends to the designated pouring location, and the concrete (fresh concrete) transported by the concrete transport hose 100 is poured to the pouring location via the nozzle 32. Note that concrete pump trucks come in various forms, and there are many variations in the number and length of the pumping pipes.

[0034] As shown in Figure 1, the concrete transported (pressurized) through each of the pumping pipes 15, 16, and 17 will free-fall inside the concrete transport hose 100. However, the transport speed increases during this free-fall process, and there is a problem that material segregation of the concrete is likely to occur due to the impact of the fall and collisions with the inner surface of the concrete transport hose 100. The concrete transport hose 100 is a hose that can effectively reduce the falling speed of the concrete and suppress material segregation.

[0035] As shown in Figure 2A, the steel pipe 20 has a general section 21 with a uniform outer diameter and an enlarged diameter section 22 above it, into which the tip of the pressure pipe 17 is fitted.

[0036] As shown in Figure 2B, bolt holes 21a are provided at any two points along the longitudinal direction of the general section 21 where a virtual diameter line passing through the center of the cross-section of the steel pipe 20 intersects the side surface. The ends of a bolt 61 (an example of a first support member) that crosses the interior 23 of the steel pipe 20 pass through the two bolt holes 21a, and the first support member 61 is fixed to the steel pipe 20 by being tightened with a nut 63 via a washer 62 on the outer surface of the steel pipe 20.

[0037] Of the first support member 61, two hanging members 70 are suspended from the central side (near the center) of the steel pipe 20. Each hanging member 70 is formed by multiple endless wire members 71 being connected to each other so as to be rotatable in the X2 direction.

[0038] The endless wire 71 in the illustrated example has a track-like shape and is made of a steel wire with sufficient rigidity to withstand impacts from concrete.

[0039] The endless wire 71 at the top of the hanging member 70 is inserted through the first support member 61, and a pair of washers 62 sandwich the endless wire 71 on both sides, and a pair of nuts 63 that are screwed onto the bolt 61 sandwich the pair of washers 62, thereby fixing the hanging member 70 to the first support member 61 without any displacement of its position.

[0040] As shown in Figure 3, the lower end of the steel pipe 20 is inserted into the upper end opening of the flexible hose 30, and both are secured with multiple (two in the illustrated example) wires 40 to form the hose body 50. Here, the members used to secure the steel pipe 20 and the flexible hose 30 may be fastening bands or the like, which secure both when two split rings are closed to form a ring, in addition to wires.

[0041] Flexible hoses 30 can include, for example, soft polyvinyl chloride hoses, silicone hoses, hoses made of PVC (polyvinyl chloride), Sunny Hose (registered trademark), etc.

[0042] Although not shown in the illustration, the hose body may be formed solely from a long steel pipe. However, the hose body 50 in the illustrated example, which is a unit structure of the steel pipe 20 and the flexible hose 30, is a preferred form because the steel pipe 20 has the rigidity to firmly fix the first support member 61, the flexible hose 30 can direct its nozzle 32 in various directions, and it is lightweight and easy to handle.

[0043] As shown in Figure 3, during the process in which concrete (not shown) is transported in the X1 direction inside the concrete transport hose 100 from top to bottom, when the concrete comes into contact with the hanging member 70 which acts as an obstacle, each endless wire 71 constituting the hanging member 70 is subjected to a rotational force along the direction of the flow of the concrete, causing it to rotate in the X2 direction and reduce the transport speed of the concrete. In this way, because each endless wire 71 rotates when the concrete comes into contact, it is possible to effectively reduce the transport speed of the concrete without causing a large impact (or reaction force) from the hanging member 70 to the concrete, without hindering the transport of the concrete, and thereby suppress material segregation of the concrete.

[0044] Furthermore, because the lower end of the hanging member 70 is not fixed, the hanging member 70 moves inside the flexible hose 30 as the concrete falls, reducing the rate at which the concrete falls without blocking the hose body 50, and thus suppressing material segregation of the concrete.

[0045] Furthermore, because the support material is a first support material 61 that traverses the inside of the steel pipe 20, it becomes possible to position the hanging material 70 that hangs down from the first support material 61 at or near the center of the cross-section of the steel pipe 20, thereby effectively reducing the transport speed of concrete passing through the inside of the hose body 50.

[0046] Furthermore, since there is no flattened section in the middle of the hose body 50, there is no risk of the hose body 50 becoming blocked when transporting concrete of various properties.

[0047] Figure 4 is a diagram corresponding to Figure 2B and is a plan view showing a modified example of the first support member. This modified example differs from the first support member 61 shown in Figure 2 in that, instead of the bolts 61 being fixed to the steel pipe 20, a rotating shaft 64 made of bolts is fixed to any two locations on the virtual diameter line of the steel pipe 20, a rotating support member 65 (an example of a support member) is rotatably attached to the two rotating shafts 64, and a hanging member 70 hangs down from the rotating support member 65.

[0048] The rotating shaft 64 is also fixed to the steel pipe 20 with a nut 63 via a washer 62. When concrete (not shown) flows down and comes into contact with the rotating support member 65, the rotating support member 65 also rotates in the X3 direction. This, combined with the rotation of each endless wire member 71 constituting the hanging member 70, makes it possible to further mitigate the impact on the concrete upon contact and reduce the concrete transport speed.

[0049] Figures 5(a) and 5(b) both show modified examples of the suspended member. The suspended member 70A shown in Figure 5(a) has a configuration in which endless wire members 72 with a perfectly circular linear shape are engaged with each other, which promotes smoother rotation in the X2 direction when it comes into contact with concrete, and further improves the impact absorption of the concrete.

[0050] On the other hand, the suspended member 70B shown in Figure 5(b) is a configuration in which endless wire members 73 with a triangular (an example of a polygon) linear shape are engaged with each other. Even with such polygonal endless wire members 73, the concrete can be transported at a reduced speed without applying a large impact to the concrete by rotating in the X2 direction when it comes into contact with the concrete.

[0051] Next, with reference to Figures 6 and 7, modified examples of the concrete transport hose according to the embodiment will be described. In the following examples, the modified examples shown in each figure differ from the example shown in Figure 2 in the form of the support material inside the steel pipe, but the flexible hose is the same. Therefore, only the configuration excluding the flexible hose will be illustrated and described.

[0052] First, Figure 6A is a side view of the concrete transport hose according to the embodiment, showing a state in which a second support member is attached to the steel pipe constituting the hose body, and a hanging member is hanging down from the second support member. Figure 6B is a view from arrow BB in Figure 6A, and is a plan view from above of the multiple second support members inside the steel pipe.

[0053] In the illustrated modified example, at an intermediate position in the longitudinal direction of the general section 21, multiple bolts 66 (an example of a second support member) that protrude without crossing the interior 23 of the steel pipe 20 pass through bolt holes 21a which are spaced at intervals (90-degree intervals in the illustrated example) in the circumferential direction on the inner surface of the steel pipe 20, and are fixed to the steel pipe 20 by being tightened with nuts 63 via washers 62 on the outer surface of the steel pipe 20.

[0054] A hanging member 70 is suspended from the portion of the second support member 66 that protrudes into the interior of the steel pipe 20. This hanging member 70 is also formed by multiple endless wires 71 that are rotatably connected to one another. In this configuration as well, the endless wire 71 at the top of the hanging member 70 is inserted through the second support member 66, a pair of washers 62 sandwich the endless wire 71 on both sides, and a pair of nuts 63 that are screwed onto a bolt 61 sandwich the pair of washers 62, thereby fixing the hanging member 70 to the second support member 66 without any displacement.

[0055] Here, the illustrated example shows a configuration in which the hanging member 70 is suspended from four second support members 66 arranged at 90-degree intervals from each other. However, it may also be a configuration in which the hanging member is suspended from two second support members arranged at 180-degree intervals, or from three second support members 66 arranged at 120-degree intervals, etc. Furthermore, instead of arranging multiple second support members 66 within the same cross-section of the steel pipe 20, multiple second support members 66 may be arranged, for example, in a spiral pattern at positions offset in the longitudinal direction of the steel pipe 20. Moreover, for example, multiple second support members may be arranged in the same first cross-section, and multiple second support members may be arranged in another identical second cross-section, so that when viewed in plan, each second support member is arranged differently in the circumferential direction of the steel pipe.

[0056] In the illustrated modified example, multiple second support members 66, which protrude without traversing the inside of the steel pipe 20, are attached at intervals in the circumferential direction on the inner surface of the steel pipe 20. This allows multiple hanging members 70 to be positioned near the inner surface of the steel pipe 20, effectively reducing the transport speed of concrete passing through the inside of the hose body.

[0057] On the other hand, Figure 7A is a side view of the concrete transport hose according to the embodiment, showing a state in which a first support member and a second support member are attached to the steel pipe constituting the hose body, and hanging members are hanging down from the first support member and the second support member, respectively. Figure 7B is a view from arrow BB in Figure 7A, and is a top view showing the first support member and the multiple second support members located inside the steel pipe.

[0058] In other words, the illustrated modified example is a configuration in which a first support member 61 and a plurality of second support members 66 are fixed to the steel pipe 20 at offset positions in the longitudinal direction, and the hanging member 70 is suspended from each of the support members 61 and 66.

[0059] According to the illustrated modified example, by arranging multiple hanging members 70 near the center of the cross-section of the steel pipe 20 and at multiple locations near the inner surface, the transport speed of concrete passing through the inside of the hose body can be reduced even more effectively.

[0060] [Performance tests and results of concrete transport hoses] The inventors conducted performance tests to evaluate the performance of the concrete transport hose according to the embodiment. Specifically, as shown in Figure 8, several types of hose test specimens having a common appearance were manufactured, concrete was transported through each hose test specimen, and the spread (flow) of the concrete was measured and observed when the concrete was dropped from the lower nozzle onto a tray. Furthermore, the scattering rate, which is an indicator of the degree of material segregation of the concrete, was determined.

[0061] Here, the hose test specimens shown in Figures 2A, 2B, and 3 were designated as Example 1, and the hose test specimens shown in Figures 6A and 6B, with a flexible hose attached in the same manner as in Figure 3, were designated as Example 2. Furthermore, a comparative example was provided that differed from Examples 1 and 2, consisting only of a steel pipe and a flexible hose, without any support or hanging members.

[0062] Figure 9A shows the test results for the spread (flow) of concrete after placement, using the hose test specimens for Examples 1 and 2 and the Comparative Example, and Figure 9B shows the test results for the scattering rate, which is an indicator of the degree of material segregation of concrete after placement, using the hose test specimens for Examples 1 and 2 and the Comparative Example, from the performance test results. Furthermore, Figure 10 shows the spread state of the concrete after placement for Example 1, Example 2, and the Comparative Example, with (a), (b), and (c) respectively.

[0063] First, as shown in Figures 9A and 10, the degree of concrete spread decreases in the order of Comparative Example, Example 2, and Example 1, demonstrating that flow can be reduced in this order.

[0064] Specifically, the comparative example had a flow rate of 770 mm, while Example 2 had a flow rate of 720 mm, demonstrating a 50 mm reduction compared to the comparative example. Furthermore, Example 1 had a flow rate of approximately 705 mm, demonstrating a further 15 mm reduction compared to Example 1.

[0065] On the other hand, as shown in Figure 9B, the dispersion rate, which is the value obtained by dividing the amount of dispersion by the total amount discharged, also decreases in the order of Comparative Example, Example 2, and Example 1, demonstrating that material separation can be reduced in this order.

[0066] Specifically, the comparative example had a dispersion rate of 8.5%, while Example 2 had a rate of 4.5%, demonstrating a 4% reduction in dispersion compared to the comparative example. Furthermore, Example 1 had a dispersion rate of 2%, demonstrating a further 2.5% reduction in dispersion compared to Example 1.

[0067] According to these experimental results, it has been demonstrated that by placing a hanging member, in which multiple endless wires are rotatably engaged with each other, inside the hose body, the spreading of concrete and material segregation can be effectively reduced. Furthermore, it has been demonstrated that an even greater effect can be obtained when the hanging member is placed closer to the center of the hose body than near the inner surface.

[0068] Other embodiments may be used in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited in any way to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of the present invention, and can be appropriately determined according to the application form. [Explanation of symbols]

[0069] 10: Concrete pump truck 11: Vehicle body 12: First Arm 13: Second Arm 14: Third Arm 15, 16, 17: Pressure pipe 18: Zipper 20: Steel pipe 21:General section 21a: Bolt hole 22: Expanded diameter part 23: Inside (hollow) 30: Flexible hose 31: Fixed end 32:Tip tip 40: Fastener (wire) 50: Hose body 61: First support member (support member, bolt) 62: Washer 63: Nut 64: Rotation axis 65: Rotating support material (support material) 66: Second support member (support member, bolt) 70,70A,70B: Hanging material 71,72,73: Endless wire 100: Concrete transport hose

Claims

1. A concrete transport hose used during concrete pouring, The hose body and A support member that protrudes into the hose body and is attached to the hose body, It has a hanging member that hangs down from the aforementioned support member, The hanging member is formed by a plurality of endless wires being connected to each other in a manner that allows for rotation. A concrete transport hose characterized in that the support member is a first support member that traverses the inside of the hose body.

2. A concrete transport hose used when pouring concrete, The hose body and A support member that protrudes into the hose body and is attached to the hose body, It has a hanging member that hangs down from the aforementioned support member, The hanging member is formed by a plurality of endless wires being connected to each other in a manner that allows for rotation. The aforementioned support member is a second support member that protrudes without crossing the inside of the hose body, A concrete transport hose characterized in that a plurality of the second support members are attached to the inner surface of the hose body at intervals in the circumferential direction, and the hanging member hangs down from each of the second support members.

3. A concrete transport hose used when pouring concrete, The hose body and A support member that protrudes into the hose body and is attached to the hose body, It has a hanging member that hangs down from the aforementioned support member, The hanging member is formed by a plurality of endless wires being connected to each other in a manner that allows for rotation. The support member comprises a first support member that crosses the inside of the hose body and a second support member that protrudes without crossing the inside of the hose body. Multiple of the second support members are attached to the inner surface of the hose body at intervals in the circumferential direction, A concrete transport hose characterized in that the hanging member hangs down from the first support member and the second support member, respectively.

4. The concrete transport hose according to any one of claims 1 to 3, characterized in that a plurality of the support members are attached at intervals along the longitudinal direction of the hose body.

5. A concrete transport hose according to any one of claims 1 to 3, characterized in that a plurality of the hanging members hang down from the support member.

6. The concrete transport hose according to any one of claims 1 to 3, characterized in that the support member is rotatably supported inside the hose body around a rotation axis.

7. The hose body comprises a steel pipe and a flexible hose attached to the end of the steel pipe. The concrete transport hose according to any one of claims 1 to 3, characterized in that the support material is attached inside the steel pipe.

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