Concrete transport hose

Abstract

To provide a concrete transport hose free from concrete blockage and 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 flexible mesh tube 80 that is attached to the inside or end of the hose body 50. The mesh tube 80 has multiple passage holes 83 formed of mesh thread 82, and the mesh thread 82 is formed of multiple endless wires 81 mutually engaged with each other.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, as the concrete freely falls, the transport speed increases, 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 configuration in which a constricted portion processed into a flat shape is provided at at least one location in the middle of the concrete transport pipe, the constricted portion has a restoring force, and an elastic force that can expand at a pressure equal to or higher than a predetermined internal pressure and become the same diameter as other portions.

[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 It has a flexible mesh tube attached inside or at the end of the hose body, The mesh tube is provided with a plurality of through holes formed by mesh threads, The aforementioned netting is characterized by being formed by the mutual engagement of multiple endless wires.

[0009] According to this embodiment, a flexible mesh tube is attached to the inside or end of the hose body, and the mesh tube has multiple passage holes formed by mesh threads. As the transported concrete passes through the passage holes while in contact with the mesh threads of the flexible mesh tube, the transport speed of the concrete is reduced. This effectively reduces the transport speed of the concrete without applying a large impact (or reaction force) to the concrete from the flexible mesh tube, thereby suppressing material segregation of the concrete. Furthermore, since the mesh threads are formed by the mutual engagement of multiple endless wires, when the transported concrete comes into contact with the mesh threads, each endless wire constituting the mesh threads may rotate, which can reduce the transport speed of the concrete. This also effectively reduces the transport speed of the concrete and helps to suppress material segregation of the concrete. In addition, 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, A fitting is provided inside or at the end of the hose body. The mounting fixture is characterized in that the mesh tube is attached to the mounting fixture.

[0012] According to this embodiment, by attaching the mesh tube to a fitting provided inside or at the end of the hose body, the attachment of the mesh tube to the hose body is improved, and displacement of the attached mesh tube when it comes into contact with concrete can be prevented. Examples of fittings include annular, semi-circular, or hook-shaped metal fittings.

[0013] Furthermore, in another embodiment of the concrete transport hose according to the present invention, The hose body comprises a steel pipe and a flexible hose attached to the end of the steel pipe. The steel pipe is fitted with the fitting, and part or all of the mesh tube is disposed inside the flexible hose.

[0014] According to this embodiment, the hose body comprises a steel pipe and a flexible hose attached to its end, and a fitting is installed inside the steel pipe, so that the mesh tube attached to the fitting can be firmly attached to the rigid steel pipe, and the flexibility of the hose body is guaranteed by the flexible hose, making it possible to form a hose body with excellent handling properties.

[0015] Here, "a part or all of the mesh tube is arranged inside the flexible hose" means that, in the case where the fitting is provided at the end of the steel pipe, the entire mesh tube attached to the fitting is arranged inside the flexible hose attached to the end of the steel pipe, and in the case where the fitting is provided at an intermediate position in the steel pipe, a part (lower portion) of the mesh tube attached to the fitting is arranged inside the flexible hose attached to the end of the steel pipe.

[0016] Furthermore, in another embodiment of the concrete transport hose according to the present invention, 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.

[0017] According to this aspect, the suspended member is suspended from a support member protruding inside the hose body, and the suspended member is formed by a plurality of endless wires connected to each other so as to be rotatable relative to one another. When the concrete being transported contacts the suspended member, the suspended member rotates while reducing the transport speed of the concrete. Therefore, without applying a large impact to the concrete from the suspended member, in combination with the mesh cylinder, the transport speed of the concrete can be effectively reduced and material separation can be suppressed.

[0018] In another aspect of the concrete transport hose according to the present invention, the support member is a first support member that crosses inside the hose body, which is characterized in that.

[0019] According to this aspect, since the support member is the first support member that crosses inside the hose body, it becomes possible to arrange the suspended member suspended from the first support member at or near the center of the cross-section of the hose body. In combination with the mesh cylinder, the transport speed of the concrete passing through the inside of the hose body can be effectively reduced.

[0020] In another aspect of the concrete transport hose according to the present invention, the support member is a second support member that protrudes without crossing inside the hose body, and a plurality of the second support members are attached at intervals in the circumferential direction of the inner surface of the hose body, and the suspended member hangs from each second support member, which is characterized in that.

[0021] According to this aspect, since a plurality of second support members, where the support member protrudes without crossing inside the hose body, are attached at intervals in the circumferential direction of the inner surface of the hose body, it becomes possible to arrange a plurality of suspended members near the inner surface of the hose body. In combination with the mesh cylinder, the transport speed of the concrete passing through the inside of the hose body can be effectively reduced.

[0022] In another aspect 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.

[0023] According to this embodiment, the support material comprises both a first support material and a second support material, and therefore multiple hanging materials can be placed at or near the center of the cross-section of the hose body, as well as at multiple locations near the inner surface. In combination with the mesh tube, this makes it possible to more effectively reduce the transport speed of concrete passing through the inside of the hose body.

[0024] 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.

[0025] 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.

[0026] Here, "multiple support members are attached at intervals along the longitudinal direction of the hose body" includes configurations in which multiple first support members are attached at different positions along the longitudinal direction of the hose body, configurations in which multiple second support members are attached spirally at different positions along the longitudinal direction of the hose body, and configurations in which multiple second support members are attached circumferentially to one cross-section of the hose body to form a single unit, and multiple units are attached at different positions along the longitudinal direction of the hose body.

[0027] Furthermore, other embodiments of the concrete transport hose according to the present invention include: The device is characterized in that multiple of the hanging members hang down from the support member.

[0028] According to this embodiment, the effect of reducing the concrete transport speed can be further enhanced by having multiple hanging members suspended from the support member. For example, a configuration in which multiple hanging members are suspended at intervals from the first support member can be cited.

[0029] Furthermore, other embodiments of the concrete transport hose according to the present invention include: The support material is characterized in that it is rotatably supported within the hose body around a rotation axis.

[0030] According to this embodiment, since the support member is rotatably supported within the hose body around a rotation axis, not only does the suspended member rotate upon contact with the concrete, but the support member also rotates. This makes it possible to effectively reduce the concrete transport speed while further reducing the impact applied to the concrete. [Effects of the Invention]

[0031] 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]

[0032] [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 mesh tube is attached to the end of the steel pipe that constitutes the hose body. [Figure 2B] Figure 2A is a view taken along arrow BB, and is a plan view from above of the inside of the steel pipe and the mesh tube located below it. [Figure 3] This is a side view of an example of a concrete transport hose according to an embodiment. [Figure 4A] 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 in addition to the mesh tube, and the hanging member is hanging down from the first support member. [Figure 4B] Figure 4A is a view along the BB arrow, and is a top-down plan view of the first support member inside the steel pipe and the mesh tube below it. [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 in addition to the mesh tube, and the suspended member is hanging down from the second support member. [Figure 6B] Figure 6A is a view taken along arrow BB, and is a top-down plan view of the second support member inside the steel pipe and the mesh tube below it. [Modes for carrying out the invention]

[0033] 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.

[0034] [Concrete transport hose according to the embodiment] Referring to Figures 1 to 6, 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, showing 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 mesh tube attached to the end of the steel pipe that constitutes the hose body, and Figure 2B is a view from arrow BB in Figure 2A, a plan view from above showing the inside of the steel pipe and the mesh tube below it. Furthermore, Figure 3 is a side view of an example of a concrete transport hose according to the embodiment.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] At the lower end of the general section 21, a plurality of semicircular metal fittings, each comprising a mounting bracket 24, are provided at intervals in the circumferential direction. A flexible mesh tube 80 is attached to each mounting bracket 24.

[0042] The mesh tube 80 is provided with a plurality of through holes 83 formed by a plurality of mesh threads 82, and the mesh threads 82 are formed by a plurality of endless wires 81 engaging with each other.

[0043] In the illustrated example, the endless wire 71 has a track-like shape and is made of steel wire with rigidity that prevents damage upon impact with concrete. Here, the endless wire 81 forming the mesh thread 82 may be an endless wire with a circular or polygonal shape in addition to the track-like shape shown in the illustrated example. Furthermore, each endless wire 81 may be rotatably engaged with each other.

[0044] By attaching the mesh tube 80 to multiple attachments 24 at the lower end of the steel pipe 20, the attachment of the mesh tube 80 to the steel pipe 20 is improved, preventing the mesh tube 80 from shifting position or detaching from the steel pipe 20 when concrete flowing down inside the steel pipe 20 comes into contact with the mesh tube 80.

[0045] 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.

[0046] The mesh tube 80, which extends downward from the lower end of the steel pipe 20, is entirely housed inside the flexible hose 30. Alternatively, multiple attachments may be provided at intervals along the inner surface of the steel pipe 20, and the mesh tube 80 may be attached to these intermediate positions. In this configuration, for example, a portion (the lower part) of the mesh tube 80 would be housed inside the flexible hose 30.

[0047] Flexible hoses 30 can include, for example, soft polyvinyl chloride hoses, silicone hoses, hoses made of PVC (polyvinyl chloride), Sunny Hose (registered trademark), etc.

[0048] 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 a steel pipe 20 and a flexible hose 30, is a preferred form because the steel pipe 20 has the rigidity to firmly secure multiple attachments 24, the flexible hose 30 can direct its nozzle 32 in various directions, and it is lightweight and easy to handle.

[0049] As shown in Figure 3, during the process in which concrete (not shown) is transported in the X1 direction through the concrete transport hose 100 from top to bottom, when the concrete comes into contact with the mesh tube 80 which acts as an obstacle, each mesh thread 82 constituting the mesh tube 80 comes into contact with the concrete, reducing the transport speed of the concrete and allowing it to pass quickly through the through holes 83. In this way, it is possible to effectively reduce the transport speed of the concrete without hindering its transport and to suppress material segregation of the concrete.

[0050] 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.

[0051] Next, with reference to Figures 4 and 6, 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 have support members of different forms attached inside the steel pipe, and the suspended material is suspended from the support members. Since the flexible hose is the same as in Figure 3, only the configuration excluding the flexible hose will be illustrated and described.

[0052] First, Figure 4A 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 in addition to the mesh tube, and the hanging member is hanging down from the first support member. Figure 4B is a view from arrow BB in Figure 4A, and is a plan view from above showing the first support member inside the steel pipe and the mesh tube below it.

[0053] As shown in Figure 4A, a mesh tube 80 is attached to the lower end of the steel pipe 20 via a plurality of fasteners 24, similar to Figure 2. In addition, bolt holes 21a are provided at any two points along the longitudinal direction of the steel pipe 20 where a virtual diameter line passing through the center of the cross-section of the steel pipe 20 intersects the side surface. The first support member 61 is fixed to the steel pipe 20 by having both 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 tightened with a nut 63 via a washer 62 on the outer surface of the steel pipe 20.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] As shown in Figure 4A, during the process in which concrete (not shown) is transported in the X3 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 given 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.

[0058] 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.

[0059] Furthermore, since the concrete also comes into contact with the mesh tube 80, the transport speed of the concrete is reduced even more effectively by the mesh tube 80 and the hanging material 70.

[0060] Here, Figures 5(a) and (b) show modified examples of the suspended member. The suspended member 70A shown in Figure 5(a) is 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.

[0061] 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.

[0062] Here, although not shown in the diagram, instead of the bolt 61 being fixed to the steel pipe 20, a rotating shaft made of bolts may be fixed to any two locations on the virtual diameter line of the steel pipe 20, and a rotating support member (an example of a support member) may be rotatably attached to the two rotating shafts, with the hanging member 70 hanging down from the rotating support member.

[0063] In this configuration, as the concrete flows down and comes into contact with the rotating support member, the rotating support member also rotates. This, combined with the rotation of each endless wire member 71 constituting the suspended member 70, makes it possible to further mitigate the impact on the concrete upon contact while reducing the concrete transport speed.

[0064] Next, Figure 6A is a side view of the concrete transport hose according to the embodiment, in which a second support member is attached to the steel pipe constituting the hose body in addition to the mesh tube, and the 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 second support member inside the steel pipe and the mesh tube below it.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] Furthermore, since the concrete also comes into contact with the mesh tube 80, the transport speed of the concrete is reduced even more effectively by the mesh tube 80 and the hanging material 70.

[0070] Here, although not shown in the illustration, a first support member 61 shown in Figure 4 and a plurality of second support members 66 shown in Figure 6 may be attached to the steel pipe 20, with hanging members 70 hanging down from each support member 61, 66, and a mesh tube 80 attached to the lower end of the steel pipe 20.

[0071] 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]

[0072] 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) 24: Mounting hardware 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 80: Mesh tube 81:Endless wire 82: Netting 83: Passing hole 100: Concrete transport hose

Claims

1. A concrete transport hose used during concrete pouring, The hose body and It has a flexible mesh tube attached inside or at the end of the hose body, The mesh tube is provided with a plurality of through holes formed by mesh threads, The concrete transport hose is characterized in that the mesh thread is formed by the mutual engagement of a plurality of endless wires.

2. A fitting is provided inside or at the end of the hose body. The concrete transport hose according to claim 1, characterized in that the mesh tube is attached to the mounting fixture.

3. 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 claim 2, characterized in that the fitting is attached to the steel pipe and part or all of the mesh tube is disposed inside the flexible hose.

4. 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 concrete transport hose according to claim 1, characterized in that the hanging member is formed by a plurality of endless wires being rotatably connected to one another.

5. The concrete transport hose according to claim 4, characterized in that the support member is a first support member that traverses the inside of the hose body.

6. The aforementioned support member is a second support member that protrudes without crossing the inside of the hose body, The concrete transport hose according to claim 4, 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.

7. 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 concrete transport hose according to claim 4, characterized in that the hanging member hangs down from the first support member and the second support member, respectively.

8. The concrete transport hose according to claim 4, characterized in that a plurality of the support members are attached at intervals along the longitudinal direction of the hose body.

9. A concrete transport hose according to any one of claims 4 to 8, characterized in that a plurality of the hanging members hang down from the support member.

10. The concrete transport hose according to any one of claims 4 to 8, characterized in that the support member is rotatably supported inside the hose body about a rotation axis.

Images