JP3093446U - Fresh concrete casting hose - Google Patents

Abstract

(57) [Summary] [Problem] A hose for pouring ready-mixed concrete that can prevent scattering of ready-mixed concrete at the time of fine pouring work and can place ready-mixed concrete at a target pouring place without using an extension member. I will provide a. SOLUTION: Since a discharge pipe 12 made of a flexible member capable of being bent or crushed is provided at a downstream end of a hard hose body 11 for pressure-feeding ready-mixed concrete, the ready-mixed concrete can be removed during a fine casting operation. Scattering can be prevented, and the ready-mixed concrete can be cast at a target casting site without using an extension member.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

The present invention relates to hoses for pouring fresh concrete used to transport fresh concrete. To do.

[0002]

[Prior art]

Conventionally, as shown in FIG. 7, the operation of placing (driving) the ready-mixed concrete 70 is performed first. Concrete 70 using, for example, a green concrete mixer (not shown) After transporting to the intended placement site, the worker 7 1. Ready-mixed concrete pouring hose operated by 1 (hereinafter also simply referred to as pouring hose) It is sent by pressure to 72. The driving hose 72 includes an internal rubber and an external rubber. And at least two pressure-proof reinforcement layers and a spirally wound reinforcement A wire is used (for example, see Patent Document 1). Using this casting hose 72, for example, cloth foundations, wall frames, parapets (for building When performing detailed placement work (such as a low handrail provided), as shown in FIG. 71 holds the pouring hose 72 and discharges the ready-mixed concrete 70 from above the mold 73 Then, another worker 74 holds the veneer plate 75 and discharges it from the driving hose 72. The concrete 70 is prevented from scattering. Further, the driving hose 72 usually has a length of about 7 to 8 m. If you want to place fresh concrete 77 a little further as shown in, In the vicinity of the mold 76 installed slightly forward from the tip of the hoses 72, If you want to drive the concrete 77, place a guide rod at the downstream end of the driving hose 72. A puller 78 is provided, and a worker 79 pulls up the guide rope 78 to set it. Lift the tip of the hoses 72 and discharge the fresh concrete 77 further We are doing the placement work.

[0003]

[Patent Document 1] JP, 2001-99361, A

[0004]

[Problems to be solved by the device]

However, the above-mentioned green concrete placing hose has the following problems. If you want other workers to help you with the placement work, do it manually. In addition, it is not possible to completely prevent the scattering of green concrete, and it is a case that does not work well. There are many. Here, place the downstream end of the driving hose at a predetermined angle with respect to the hose body. It is possible to prevent the scattering of green concrete by bending it to As mentioned above, the reinforcement hose is spirally wound around the driving hose. It is hard and cannot be bent easily. Also, even if you lift the tip of the driving hose with the guide rope, If ready-mixed concrete cannot be placed at the installation site, add one more pipe to the placing hose. In some cases, there is no choice but to add, which is troublesome. Where under the hose for driving Crush the end of the flow side, and pass the area of fresh concrete from the upstream side to the downstream side. It is possible to make it smaller and discharge fresh concrete further, but the above As described above, since the driving hose is hard, the downstream end can be easily crushed. I can't. The present invention has been made in view of such circumstances, and it is a raw concrete container for fine placement work. The cleat can be prevented from scattering and the desired placement location can be achieved without using an extension member. The aim is to provide a hose for pouring ready-mixed concrete that can be used for pouring ready-mixed concrete. Target

[0005]

[Means for Solving the Problems]

A hose for pouring fresh concrete according to the first aspect of the present invention is a raw concrete cleaner. Flexibility that can be bent or crushed at the downstream end of the hard hose body that pumps A discharge pipe made of a member having is provided. In this way, since the discharge pipe can be bent, The discharge pipe can be bent, for example, at a predetermined angle with respect to the hose body. Also, Since the discharge pipe can be crushed, for example, crush the central portion in the longitudinal direction of the discharge pipe. And reduce the passage area of the fresh concrete in the discharge pipe from the upstream side to the downstream side. be able to. Here, in the hose for placing fresh concrete according to the first invention, The inner diameter of the part through which the concrete passes is 80 to 120 mm, and the raw concrete It is preferable that the entire length of the portion through which the blade passes is 30 to 250 mm. This The length of the discharge pipe can be specified so that it can be transformed into a predetermined shape according to each casting operation. It

[0006] In the hose for pouring fresh concrete according to the first invention, the discharge pipe is the hose body. Is preferably integrally joined to the downstream end of the. In this way, the discharge pipe Since it is provided integrally with the hose body, it can There is no risk that the outlet pipe will come off the hose body. In the hose for pouring fresh concrete according to the first invention, the discharge pipe is the hose body. Is preferably removably joined to the downstream end of the. In this way, Since the outlet pipe is detachably joined to the hose body, the hose It is also possible to attach a drain pipe to the downstream end of the body. In the fresh concrete pouring hose according to the first invention, the hoses are provided on the base side of the discharge pipe. It is preferable that the base body is provided with a connecting portion that covers from the outside. in this way Since the connection part is provided on the base side of the discharge pipe, it is easy to attach the discharge pipe to the hose body. In addition, it can be performed reliably. In the fresh concrete pouring hose according to the first invention, the inner diameter of the connecting portion of the discharge pipe Is substantially the same as the outer diameter of the hose body, and is formed on the discharge pipe downstream of the connecting part. It is preferable that the inner diameter of the discharge part is substantially the same as the inner diameter of the hose body. Good In this way, make the inner diameter of the connection part of the discharge pipe substantially the same as the outer diameter of the hose body. This makes it difficult for the discharge pipe to fall out of the hose body. Also, the discharge of the discharge pipe By making the inner diameter of the part substantially the same as the inner diameter of the hose body, for example, the hose body The flow of fresh concrete that has been pumped can be made uniform.

[0007] A hose for pouring ready-mixed concrete according to a second aspect of the present invention is a fresh concrete cleaner. A flexible hose that can be bent or crushed at the downstream end of the hard hose body A discharge pipe made of a flexible material is detachably joined to the base of the discharge pipe. The hose body is provided with a connecting part that covers from the outside, and the inner diameter of the discharge pipe is on the upstream side. From the downstream side to the downstream side, it is substantially the same as the outer diameter of the hose body. Like this, discharge Make the inner diameter of the pipe substantially the same as the outer diameter of the hose body from the upstream side to the downstream side. Therefore, the shape of the discharge pipe can be simplified. Here, in the fresh concrete placing hose according to the second invention, the inner diameter of the discharge pipe is Is 80-130 mm, and the total length of the portion of the discharge pipe through which the fresh concrete passes is 30- It is preferably 250 mm. This allows the length of the discharge pipe to be adjusted for each placement work. A length that can be transformed into a predetermined shape can be specified.

[0008]

[Embodiment of device]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. To understand the present invention. Here, FIG. 1 shows a hose for pouring ready-mixed concrete according to a first embodiment of the present invention. FIG. 2 is a side cross-sectional view, and FIG. 2 is an explanatory view and a diagram when the discharge pipe of the hose for pouring concrete is bent. 3 is an explanatory view when the discharge pipe is crushed, and FIG. 4 is a raw material according to a second embodiment of the present invention. FIG. 5 is a side sectional view of the concrete pouring hose. FIG. 6 is a front view of a hose for pouring fresh concrete according to a third embodiment of the present invention. It is a sectional side view.

[0009] As shown in FIG. 1, a green concrete placing hoe according to a first embodiment of the present invention. The soot (hereinafter, also simply referred to as a pouring hose) 10 is a hard material for pumping ready-mixed concrete. Flexible member that can be bent or crushed at the downstream end of the hose body 11 A discharge pipe 12 is provided. The details will be described below.

[0010] The hose body 11 has a total length of, for example, 7 to 8 m, and its inner diameter D1 is 80 It is about 120 mm (about 90 to 100 mm in this embodiment). This hose book The body 11 has an inner rubber 13 and an outer rubber 14, and the outer shape of the hose body 11 is It is smooth. In addition, the external shape of the hose body 11 may be, for example, a texture or an unevenness. You may The inner rubber 13 has a thickness of, for example, 2 to 4 mm and has excellent wear resistance. Natural rubber (NR) is used, and the external rubber 14 has a thickness of, for example, 1 ． A natural rubber having excellent weather resistance and abrasion resistance of 5 to 3 mm is used. In this On the outside of the rubber part 13, for example, a cord made of nylon (Fig. (Not shown) is wound on the outside, and a reinforcing wire made of steel, for example, having a diameter of 2-3 mm The ears 15 are arranged in a spiral shape. The outside of this reinforcing wire 15 is A nylon cord (not shown) is wrapped around the pressure-reinforcing layer. The outer rubber 14 is provided on the outside thereof. In this way, the reinforcing wire 15 is sandwiched between the inner rubber 13 and the outer rubber 14. Since each cord is placed in, the hose body 11 becomes rigid and The swelling and internal wear of the hose body 11 during the concrete pumping, and External wear during movement of the main body 11 is prevented.

[0011] The material of the inner rubber 13 and the outer rubber 14 is limited to the above-mentioned natural rubber. Not used, but thermoplastic or thermosetting polymer can be used. Even hard, semi-hard However, it may be soft, for example, rubber, elastomer (which exhibits rubber elasticity near room temperature). Polymeric substances), plastics and the like. As rubber and elastomer, isoprene rubber (IR), butadiene rubber (BR ), Acrylonitrile-butadiene copolymer rubber (NBR), styrene-butadien Copolymer rubber (SBR), chloroprene rubber (CR), butyl rubber (IIR), Ethylene propylene rubber (EPM / EPMD), ethylene vinyl acetate copolymer ( EAM), chlorosulfonated polyethylene (CSM), chlorinated polyethylene (C M), epichlorohydrin rubber (CO / ESO), nitrileprene rubber (NIR ), Acrylic rubber (ACM), urethane rubber (U), polysulfide rubber (T), silicone Rubber (Q), fluororubber (FKM), soft vinyl chloride resin, ethylene / propy Examples include olefin terpolymers such as len / butadiene, etc. Can mix two or more kinds to manufacture the inner rubber 13 and the outer rubber 14.

[0012] Further, as the plastic, for example, an olefin polymer compound (low density poly Ethylene, linear low density polyethylene, high density polyethylene, polypropylene, Polybutene-1, poly-3-methylbutene, ethylene / propylene block or Random copolymers, etc., polyester resins (various polycarbonates, polyethylene) Terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate Rate), styrene-based polymer compounds (polystyrene, high-impact polystyrene) Ren (HIPS) resin, acrylonitrile butadiene styrene (ABS) resin, Chlorinated Polyethylene Acrylonitrile Styrene (ACS) Resin, Styrene Acrylo Nitrile (SAN) resin, acrylonitrile butyl acrylate styrene (AA S) resin, styrene maleic acid resin, styrene maleimide resin, ethylene propylene Ren acrylonitrile styrene (AES) resin, butadiene methyl methacrylate Styrene (MBS) resin, etc., linear polyamide (polycarbonate and styrene type) Polymer alloy with resin, polyphenylene sulfide, polycaprolactone, Lihexamethylene adipamide, etc.), polyvinyl chloride, phenol resin, epoxy Resins, urethane resins, acrylic polymer compounds, etc. may be mentioned. It is also possible to manufacture the inner rubber 13 and the outer rubber 14 by mixing one or more kinds of rubber. It is possible.

[0013] In addition, by mixing two or more of the above-mentioned rubber or elastomer and plastic, It is also possible to manufacture the rubber 13 and the external rubber 14. Here, the material selection is Usage conditions of the hose 10 for casting (for example, usage environment, composition of fresh concrete and transportation) Speed, etc.). Further, the inner surface of the inner rubber 13 is not It is also possible to dispose a wear resistant material on the inner surface of the inner rubber 13 to further improve the wear resistance of the inner rubber 13. It These rubbers, elastomers and plastics include, for example, antioxidants and UV absorbers. Agent, resin additive such as plasticizer, filler (talc, silica powder, titanium oxide, etc.), adhesion Add colorants, reinforcements (glass fiber, carbon fiber, aramid fiber, whiskers, etc.) You may.

[0014] The downstream end of the hose body 11 is made of, for example, a soft material such as rubber or elastomer. The discharge pipe 12 made of a flexible material is integrally joined. Here, ho The inner rubber 13 and the outer rubber 14 of the base body 11 are made of natural rubber. The inner rubber 13 and the outer rubber 14 are used to form the discharge pipe 12. By this Therefore, the hose body 11 and the discharge pipe 12 are integrally manufactured without separately manufacturing. Good workability. If the materials of the hose body and the discharge pipe are different, separate the hose body and the discharge pipe. After manufacturing, it is possible to melt and join the contact part between the hose body and the discharge pipe. Is. The discharge pipe 12 uses the inner rubber 13 and the outer rubber 14 of the hose body 11, and It has a layered structure, and moreover, the above-mentioned blind is provided between the inner rubber 13 and the outer rubber 14. The cord is arranged, but the reinforcing wire 15 is not arranged. Two layers It is not necessary to dispose the cords on the portion of the structured discharge pipe. Also, the discharge pipe It is also possible to have a one-layer structure without dividing the internal rubber 13 and the external rubber 14 into one. Noh. As described above, since the reinforcing wire is not arranged in the discharge pipe 12, the discharge pipe 12 is soft. It can have flexibility.

[0015] The inner diameter d1 of the discharge pipe 12 is a portion through which fresh concrete passes. From the upstream side to the downstream side of the hose body 11 is substantially the same as the inner diameter D1, 80 to 120 mm (about 90 to 100 mm in this embodiment), and The total length L1 of the portion of the outlet pipe 12 through which the fresh concrete passes is 30 to 250 mm ( In the embodiment, it is about 100 mm). The inner diameter d1 of the discharge pipe 12 is a commonly used ready-mixed concrete hose. It is set based on the inner diameter (80 to 120 mm) of the hose body. In addition, When the inner diameter d1 of the outlet pipe 12 is less than 80 mm, the inner diameter d1 is larger than the inner diameter of the hose body. Since it becomes too small, the raw concrete may be discharged from the discharge pipe 12 more than necessary. And if the inner diameter d1 exceeds 120 mm, the inner diameter d1 will be Is too large than the inner diameter of the There is a risk that it will fall as it is without ejecting it in the front, making placement work difficult in both cases. May become. When the total length L1 of the discharge pipe 12 is less than 30 mm, the length of the discharge pipe 12 is short. There is a risk that the shape of the discharge pipe 12 cannot be deformed into a shape suitable for each placement work. is there. On the other hand, when the total length L1 is longer than 250 mm, it is composed of a flexible member. The shape of the exhaust pipe 12 is too long, and the shape of the exhaust pipe 12 is intended during the placing work. Could not be made into a shape, and workability might deteriorate. Furthermore, the shape of the discharge pipe 12 is changed to In order to surely transform it into a shape suitable for the work and to improve workability, The length L1 is preferably 50 to 200 mm, more preferably 70 to 150 mm. Preferably.

[0016] Here, a method of using the above-mentioned green concrete placing hose 10 will be described. . As shown in FIG. 2, by using the driving hose 10, a fine driving operation, for example, a formwork is performed. When placing the ready-mixed concrete 17 on the pipe 16, the worker 18 The discharge pipe 12 is connected to the hose body 11 so that the opening 19 of the hose faces the inside of the mold 16. Then, for example, it is bent at a right angle and then performed. This allows for fine placement work In the case of the conventional method, there is no need for other workers to help It is possible to prevent the scattering of the toner.

[0017] If you want to pour the ready-mixed concrete 20 a little further away, see Fig. 3. Then, the worker 21 crushes the central portion of the discharge pipe 12 in the longitudinal direction, and The passage area of the cleat 20 is reduced from the upstream side to the downstream side. This allows Crush the discharge pipe 12 to the discharge speed of the ready-mixed concrete 20 discharged from the discharge pipe 12. You can do it faster than if you do not, you can discharge the fresh concrete 20 further Because it is possible, it is possible to use ready-mixed concrete 20 at the target pouring place without using extension members. Can be placed. Therefore, as in the past, a guide rope is attached to the downstream end of the driving hose. Without installing a pipe as an extension member Therefore, the workability is good because the placement work can be performed.

[0018] Next, the hose 25 for pouring fresh concrete according to the second embodiment of the present invention will be described. Explain. In the hose 25 for pouring fresh concrete, the discharge pipe 26 has a hose body 27. It is characterized in that it is detachably joined to the downstream end of the. As shown in FIG. 4, the hose body 27 is provided between the inner rubber 28 and the outer rubber 29. A structure in which each cord (not shown) is arranged with the reinforcing wire 30 in between. It has a (two-layer structure). The internal rubber 28, the external rubber 29, and the reinforcement The wire 30 includes the inner rubber 13, the outer rubber 14, and the reinforcing wire 15 described above. The hard hose body 27 is made of the same material as the above. The base side of the discharge pipe 26 made of natural rubber is connected to the hose body 27 from the outside. A connecting portion 31 is provided so that the discharge pipe 26 can be removed from the downstream end of the hose body 27. It is possible to join. Here, the discharge pipe 26 has a single-layer structure made of only natural rubber. However, two layers with internal rubber and external rubber considering wear resistance and weather resistance It may have a structure, in which case a cord may be arranged between the inner rubber and the outer part. . No reinforcing wire is placed.

[0019] As shown in FIGS. 4 and 5, the inner diameter of the connecting portion 31 of the discharge pipe 26 is equal to that of the hose body 27. Since the outer diameter is substantially the same as the outer diameter, the connecting portion 31 is attached to the hose body 27 from the outside. By covering the hose body 27 with the smooth outer peripheral surface and the inner peripheral surface of the connecting portion 31, Abut. In this state, the ring-shaped band 32, which is partially open, Bolts 35 and nuts 3 which are fitted from above and connect both ends 33 and 34 of the band 32. 6. Tighten bolts 35 using washers 37, spring washers 38 Thus, the discharge pipe 26 can be securely fixed to the hose body 27.

[0020] In addition, by providing a convex portion on the portion of the hose body 27 that the connecting portion 31 covers, the hose The frictional resistance between the main body 27 and the connecting portion 31 is increased, and the connecting portion 31 from the hose main body 27 is The displacement can be prevented and the discharge pipe 26 can be securely fixed to the hose body 27. Well Further, by providing a concave portion or a convex portion on the outer surface of the connecting portion 31, for example, in the concave portion To attach the band 32 to, or to bring the side of the band 32 into contact with the side of the protrusion. To prevent the band 32 from shifting from the connecting part 31 during the pressure-feeding of ready-mixed concrete. It is also possible to do so. At the portion where the fresh concrete passes, which is formed in the discharge pipe 26 on the downstream side of the connecting portion 31. The inner diameter d2 of a certain discharge part 39 is the inner diameter D2 of the hose body 27 (80 to 120 mm). And the total length L2 of the discharge part 39 is substantially the same as that of the discharge pipe 12 described above. The length is substantially the same as the total length L1 of the portion through which the fresh concrete passes. In addition, An abrasion resistant material is further arranged on the inner surface of the discharge part 39 to improve the wear resistance of the discharge part 39. It is also possible to improve.

[0021] Then, the hose 40 for pouring fresh concrete according to the third embodiment of the present invention is connected. As will be described with reference to FIG. Except that the inner diameter d3 of the concrete is different from that of the hose 25 for pouring fresh concrete described above. Since they are qualitatively the same, the same numbers are given to the same members and detailed explanations are omitted. It As shown in FIG. 6, the hose body 43 is provided between the inner rubber 44 and the outer rubber 45. A structure in which each cord (not shown) is arranged across the reinforcing wire 46. It has a (two-layer structure). The hose body 43 is the hose body 27 described above. And has substantially the same configuration.

[0022] The base of the discharge pipe 41 using natural rubber is connected to the hose body 43 from the outside. A connecting portion 47 is provided, and the discharge pipe 41 is attached to the downstream end of the hose body 43. It is possible to join. Here, the discharge pipe 41 has a one-layer structure made of only natural rubber. However, two layers with internal rubber and external rubber considering wear resistance and weather resistance It may have a structure, in which case a cord may be arranged between the inner rubber and the outer part. . No reinforcing wire is placed. The inner diameter d3 of the discharge pipe 41 is set from the upstream side to the downstream side of the discharge pipe 41 from the hose body. 43 is substantially the same as the outer diameter D3, and the inner diameter d3 is 80 to 130 mm. . Further, the total length L3 of the discharge part 42 on the downstream side of the connecting part 47 is equal to that of the discharge part 39 described above. The length is substantially the same as the total length L2. The inner diameter d3 of the discharge pipe 41 is a commonly used ready-made concrete hose. The inner diameter (80 to 120 mm) and thickness (for example, 3.5 to 7 mm) of the hose body of It is set based on. If the inner diameter d3 of the discharge pipe 41 is less than 80 mm, , The inner diameter d3 becomes too smaller than the inner diameter of the hose body. May discharge more than necessary, and the inner diameter d3 exceeds 130 mm. If this happens, the inner diameter d3 becomes too larger than the inner diameter of the hose body. The ready-mixed concrete discharged from No. 1 may fall without being discharged to the front. Due to this, there is a possibility that the placing work will be difficult in both cases.

[0023] Although the present invention has been described above with reference to the embodiments, the present invention has been described above. The present invention is not limited to the configurations described in the embodiments, but is included in the scope of claims for utility model registration. It also includes other embodiments and modifications that are conceivable within the scope of the matters described. Of. For example, some or all of the above-described respective embodiments and modifications may be combined. The scope of rights of the present invention is also applicable when the hose for pouring fresh concrete of the present invention is also constructed. include. Further, in the above-described embodiment, as a flexible member used for the discharge pipe, The case where natural rubber was used was explained, but the rubber and It is also possible to use a lastomer. Further, in the above-described embodiment, the band is used to attach the discharge pipe to the hose body. However, using other things such as bolts, the downstream end of the hose body It is also possible to fix the connecting part of the discharge pipe to the.

[0024]

[Effect of device]

In the fresh concrete pouring hose according to claims 1 to 8, the discharge pipe can be bent. Therefore, the discharge pipe can be bent at a predetermined angle with respect to the hose body. . As a result, it is possible to prevent the scattering of green concrete even during fine pouring work, In addition, the work that used to require manpower can be performed by one person, for example. Will be good. Further, since the discharge pipe can be crushed, for example, the central portion in the longitudinal direction of the discharge pipe is The crushed and discharged concrete passage area is small from upstream to downstream. You can do it. As a result, the discharge speed of ready-mixed concrete discharged from the discharge pipe The speed is higher than when the discharge pipe is not crushed. Since it can be discharged, it can be used directly at the intended placement location without the use of extension members. Concrete can be placed and workability is improved. Particularly, in the ready-mixed concrete hose according to claims 2 and 8, Since the length is defined as a length that can be transformed into a predetermined shape according to each placement work, Installation work can be performed easily.

[0025] In the fresh concrete pouring hose according to claim 3, the discharge pipe is provided in the hose body. Since it is provided integrally, for example, when pumping fresh concrete, the discharge pipe is a hose. There is no danger of it coming off the main body, and workability during placement work will be improved. In the fresh concrete pouring hose according to claim 4, the discharge pipe is provided in the hose body. Since it is detachably joined, it can be attached to the downstream end of the conventional hose body. It becomes possible to install a discharge pipe. Therefore, the fresh concrete used conventionally It is economical because you can use the driving hose without replacing it. In the ready-mixed concrete pouring hose according to claim 5, a connecting portion is provided on the base side of the discharge pipe. Since it is provided, the discharge pipe can be easily and securely attached to the hose body. The installation work can be done easily.

[0026] In the fresh concrete pouring hose according to claim 6, the inner diameter of the connecting portion of the discharge pipe By making the outer diameter of the hose body substantially the same, Since it is difficult to drop, the discharge pipe can be fixed to the hose body, when pouring fresh concrete The workability in is improved. Also, by making the inner diameter of the discharge portion of the discharge pipe substantially the same as the inner diameter of the hose body, For example, it is possible to make the flow of fresh concrete that has been pumped by the hose body uniform. This As a result, it is possible to prevent the hardening of the ready-mixed concrete in the discharge pipe, Can be used and is economical. In the fresh concrete pouring hose according to claims 7 and 8, the inner diameter of the discharge pipe is From the upstream side to the downstream side, since the outer diameter of the hose body is substantially the same, discharge The shape of the tube can be simplified and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of a fresh concrete placing hose according to a first embodiment of the present invention.

FIG. 2 is an explanatory view when the discharge pipe of the hose for pouring concrete is bent.

FIG. 3 is an explanatory diagram when the discharge pipe is crushed.

FIG. 4 is a side sectional view of a fresh concrete placing hose according to a second embodiment of the present invention.

FIG. 5 is a front view of the same-grade concrete placing hose.

FIG. 6 is a side sectional view of a fresh concrete placing hose according to a third embodiment of the present invention.

FIG. 7 is an explanatory view of a usage state of a hose for placing ready-mixed concrete according to a conventional example.

FIG. 8 is an explanatory view of a usage state of a green concrete placing hose according to a conventional example.

[Explanation of symbols]

10: hose for pouring fresh concrete, 11: hose body, 12: discharge pipe, 13: internal rubber, 14: external rubber,
15: Reinforcing wire, 16: Form, 17: Ready concrete, 18: Worker, 19: Opening part, 20: Ready concrete, 21: Worker, 25: Ready concrete pouring hose, 26: Discharge pipe, 27 : Hose body, 28: Internal rubber, 29: External rubber, 30: Reinforcing wire, 31: Connection part, 32: Band, 33, 34: End part, 35: Bolt,
36: nut, 37: washer, 38: spring washer, 39: discharge part, 40: hose for pouring fresh concrete, 41: discharge pipe, 42: discharge part, 43: hose body,
44: internal rubber, 45: external rubber, 46: reinforcing wire, 47: connecting part

Claims (8)

[Scope of utility model registration request] 1. A hose for pouring fresh concrete, characterized in that a discharge pipe made of a flexible member that can be bent or crushed is provided at the downstream end of a hard hose body for pumping fresh concrete. . 2. The hose for pouring fresh concrete according to claim 1, wherein an inner diameter of a portion of the discharge pipe through which the raw concrete passes is 80 to 120 mm, and a total length of a portion through which the green concrete passes is 30 to 250 mm. Hose for pouring ready-mixed concrete. 3. The hose for pouring fresh concrete according to claim 2, wherein the discharge pipe is integrally joined to a downstream end of the hose body. . 4. The hose for pouring ready-mixed concrete according to claim 2, wherein the discharge pipe is detachably joined to a downstream end of the hose body. . 5. The hose for pouring fresh concrete according to claim 4, wherein a connection portion that covers the hose body from the outside is provided on the base side of the discharge pipe. Hose. 6. The hose for pouring ready-mixed concrete according to claim 5, wherein an inner diameter of a connecting portion of the discharge pipe is substantially the same as an outer diameter of the hose body, and the discharging portion is provided downstream of the connecting portion. The hose for pouring ready-mixed concrete, wherein the inner diameter of the discharge portion formed in the pipe is substantially the same as the inner diameter of the hose body. 7. A discharge pipe made of a flexible material that can be bent or crushed is detachably joined to the downstream end of a hard hose body for pumping fresh concrete. Is provided with a connecting portion that covers the hose body from the outside, and the inner diameter of the discharge pipe is substantially the same as the outer diameter of the hose body from the upstream side to the downstream side. Hose for driving. 8. The hose for pouring fresh concrete according to claim 7, wherein the discharge pipe has an inner diameter of 80 to 130 mm.
And the total length of the portion through which the ready-mixed concrete passes is 30-
A hose for pouring fresh concrete, which is 250 mm.