Simple mixing unit and grout material adjustment method

Abstract

To provide a simple agitation unit and a grout material adjusting method that enable anyone to efficiently agitate and adjust in a short time a grout material of high viscosity hitherto considered to be difficult to adjust.SOLUTION: A simple agitation unit 10 is equipped with a cylinder body 20 and an agitation blade 30 which can be inserted into the cylinder body 20. The cylinder body 20 comprises a cylinder main body 21 which is used as an agitation container of a grout material, and which can be used as a discharge container of the grout material. The agitation blade 30 includes: an inlet lid 31 which is fitted to an opening at the other end of the cylinder main body 21 to seal the opening; a shaft part 32 provided by penetrating the inlet lid 31 so as to be slidable; and a blade part 33 provided at a tip of the shaft part 32. The blade part 33 is constituted of a plurality of inclined wings 35 projecting radially in a radial direction from the tip of the shaft part 32. The inclined wing 35 is inclined at a prescribed inclination angle relative to a horizontal line. A diameter of the blade part 33 has a dimensional relationship of being smaller than an inner diameter of the cylinder main body 21, and a blade width of the inclined wing 35 has a dimensional relationship of being smaller than the diameter of the blade part 33.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technique for adjusting grout material used in embedding reinforcing bars and bolts in various concrete structures, repairing cracks, etc., and more particularly to a mixing unit for adjusting grout material on-site and a method for adjusting grout material. [Background technology]

[0002] When embedding rebars and bolts or repairing cracks in various concrete structures, grout materials are prepared on-site by mixing hydraulic powder and liquid such as water inside a cylinder. Patent Document 1 discloses a grout mixer that includes a syringe-shaped cylindrical body that contains hydraulic powder beforehand and a piston that is movably housed inside the cylindrical body, and that mixes and stirs the liquid by injecting the liquid into the cylindrical body and then shaking the cylindrical body to apply vibrations. Furthermore, Patent Document 2 discloses a stirring rod having a bent contact portion at the tip of a rod material that can contact the inner circumferential surface of the cylinder as a means for stirring hydraulic powder and liquid in a syringe-shaped cylinder. Furthermore, Patent Document 3 discloses a stirrer equipped with a stirring rod formed by bending a single rod into a crank shape. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-208682 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-224045 [Patent Document 3] Japanese Patent Application Publication No. 2018-51523 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional stirrers have the following problems. <1> The agitator described in Patent Document 1 has a syringe-shaped cylindrical body that contains hydraulic powder in advance. When preparing the grout material, the outlet of the cylinder must be turned upward and the liquid must be poured through the small diameter outlet, making the liquid pouring process very tedious. <2> The stirring rod disclosed in Patent Document 2 has a contact portion formed at the tip of the stirring rod that is eccentric with respect to the straight portion of the stirring rod. This causes the stirring rod to wobble when rotated, making stirring difficult. In addition, the stirring range of the stirring rod is narrow, resulting in low efficiency in stirring the grout material. <3> The agitator described in Patent Document 3, which is equipped with a crank-shaped agitator rod, is intended for use in preparing low-viscosity grout materials. Therefore, although there is no problem with the grout material prepared using the agitator described in Patent Document 3 when injected downward, when used upward or sideways, the grout material drips, which places restrictions on the direction in which the grout material can be injected. <4> When attempting to increase the viscosity of grout using the mixer described in Patent Document 3, the resistance to mixing increases, causing the crank part of the mixing rod to deform, making mixing impossible. <5> With conventional mixers, the mixing effect tends to vary greatly depending on the skill of the operator. This results in uneven quality of the grout material, resulting in variations in adhesion performance. <6> Most of the conventional mixers are designed to prepare low viscosity grout materials, and therefore cannot be used to prepare high viscosity grout materials. <7> Even with a mixer capable of mixing high viscosity grout, uneven mixing of the grout material inside the cylinder is likely to occur, and mixing takes a long time. <8> When accessories such as the piston and cap are removed from the cylindrical body, the inlet and outlet of the cylindrical body are opened, making it easier to clean the inner circumferential surface of the cylindrical body. <9> In conventional mixers, a piston is inserted into the cylindrical body when the mixer is set on an injection gun and used for grouting work. Conventional cylinder bodies have a bottomed structure, so after the grouting work is completed, not only the cylinder body but also the piston is disposed of as waste, which is not only uneconomical but also has a negative impact on the environment.

[0005] The present invention has been made in view of the above points, and its object is to provide a simple stirring unit and a method for adjusting grout material that can solve the above problems. [Means for solving the problem]

[0006] The present invention provides a simple mixing unit comprising at least a cylindrical body and a mixing blade that can be inserted into the cylindrical body, and that uses the mixing blade to mix hydraulic powder and liquid introduced into the cylindrical body to prepare a high-viscosity grout material. The cylindrical body has a bottomed structure with one end that can be opened, so that it can be used as a mixing container for the grout material, and also comprises a cylindrical body that can be used as a dispensing container for the grout material by attaching an injection nozzle to one end and loading it into an injection gun. The mixing blade has at least a shaft that is longer than the axial length of the cylindrical body and a blade provided at the tip of the shaft, and the blade consists of a plurality of inclined blades that protrude radially from the tip of the shaft in a radial direction, the inclined blades are made of strips, and the inclined blades are inclined at a predetermined angle with respect to the horizontal line. The diameter of the blade portion is smaller than the inner diameter of the cylindrical body, and the blade width of the inclined blade is smaller than the diameter of the blade portion. In another embodiment of the present invention, the stirring blade has an inlet lid that can be attached to and closed off at the opening at the other end of the cylindrical body, and the shaft portion slidably passes through the inlet lid. In another embodiment of the present invention, an opening is formed at one end of the cylindrical body, and the opening is closed by a piston to give the cylindrical body a bottomed structure. In another embodiment of the present invention, the cylindrical body may have a bottom formed at one end thereof, and a discharge portion formed as a protrusion on a part of the bottom may be closed with a plug to give the cylindrical body a bottomed structure. In another embodiment of the present invention, the inclination angle of the inclined blades is 30° to 45°, the blade portion comprises three or four inclined blades, the diameter of the blade portion is 85 to 89% of the inner diameter of the tube body, and the blade width of the inclined blades is 20% to 30% of the diameter of the blade portion. The present invention is a method for preparing grout material using a simple stirring unit that includes at least a cylindrical body and a stirring blade that can be inserted into the cylindrical body, and that prepares grout material by stirring hydraulic powder and liquid introduced into the cylindrical body with the stirring blade, and uses the simple stirring unit to reciprocate the stirring blade multiple times along the cylindrical body when stirring the hydraulic powder and liquid inside the cylindrical body. In another embodiment of the present invention, the stirring blade reciprocates 10 to 20 times. [Effects of the Invention]

[0007] The present invention has at least one of the following advantages. <1> In the present invention, by limiting the number of inclined blades, the inclination angle of the inclined blades, the relationship between the inner diameter of the tube body and the diameter of the blade portion, etc., it is possible to efficiently mix and adjust high-viscosity kraut material, which has previously been difficult to adjust, in a short period of time. <2> By limiting the number of times the stirring blade moves back and forth within a cylinder containing hydraulic powder and liquid to a certain number of times, anyone can easily prepare high-viscosity grout material, without being limited to highly skilled professionals. <3> The grout can be adjusted to a high viscosity, improving the adhesion of the grout. Therefore, it can easily be used for horizontal and upward construction, which was difficult to do with low-viscosity grout prepared using conventional technology. <4> When accessories such as the piston and cap are removed from the cylindrical body, the inlet and outlet of the cylindrical body can be opened, making it easier to clean the inner circumferential surface of the cylindrical body. <5> When the opening at one end of the cylindrical body is sealed with a piston to give the cylindrical body a bottomed structure, the piston can be removed from the cylindrical body, so that the piston and cylindrical body can be reused any number of times, which is economical and reduces waste, thereby avoiding environmental problems. [Brief explanation of the drawings]

[0008] [Figure 1] 1A is an explanatory diagram of a simple stirring unit according to a first embodiment of the present invention; FIG. 1B is an explanatory diagram of another bottom structure of a cylindrical body; [Figure 2] An explanatory diagram of the blade section, (A) is a longitudinal cross-sectional view of the mixing unit, and (B) is a cross-sectional view of BB in (A). [Figure 3] This is an explanatory diagram of how to prepare grout material. (A) is an explanatory diagram of the process of putting hydraulic powder and liquid into the cylinder, (B) is an explanatory diagram of attaching and fixing the stirring blade to the cylinder body, and (C) is an explanatory diagram of the stirring process using the stirring blade. [Figure 4] An explanatory diagram of the grout dispensing method. (A) is an explanatory diagram of the process of attaching a cap and injection nozzle to the outlet of the tube body, and (B) is an explanatory diagram of the process of dispensing grout using an injection gun. [Figure 5] FIG. 10 is an explanatory diagram of another bottom structure of the tube body according to the second embodiment of the present invention. [Figure 6] FIG. 2 is an explanatory diagram of a method for preparing a grout material according to a second embodiment of the present invention; (A) is an explanatory diagram of a process for introducing hydraulic powder and liquid into a cylindrical body; (B) is an explanatory diagram of a process for attaching an agitating blade to the cylindrical body and a process for agitation by the agitating blade. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Example 1] <1> Simple mixing unit The simple stirring unit 10 will be described with reference to FIG. The simple stirring unit 10 according to the present invention comprises at least a cylindrical body 20 having a bottomed structure and a stirring blade 30 that can be inserted into the cylindrical body 20 .

[0010] <2> Cylindrical body The cylindrical body 20 not only functions as a stirring vessel for the hydraulic powder 41 and liquid 42 that are the raw materials of the grout material 40, but also serves as a discharge vessel for the grout material 40. The cylindrical body 20 is made up of a cylindrical main body 21 having a uniform diameter and a bottom. There are no particular restrictions on the material of the cylindrical body 21, and it may be made of either resin or metal. In practice, a cylindrical body made of resin is preferable because it is easy to mold.

[0011] The volume of the cylindrical body 21 can be appropriately selected depending on the volume of the grout material 40 . For example, when preparing 1300 ml of grout material 40, a cylindrical body 21 having an inner diameter of 96 mm, a height of 330 mm, and a volume of 2300 ml is used.

[0012] The cylindrical body 21 has an inlet 21a and an outlet 21b at both ends thereof. The inlet 21a of the cylindrical body 21 houses a cylindrical piston 22 to seal the opening. The piston 22 is able to slide freely along the inner peripheral surface of the cylindrical body 21 while maintaining a sealing property. The hydraulic powder 41 and the liquid 42 are introduced into the cylindrical body 21 through the outlet 21b.

[0013] A detachable cap 23 is attached to the outlet 21b of the cylindrical body 21, and a discharge part 24 protruding from a part of the cap 23 can be fitted with an injection nozzle 25, which is a separate member. The injection nozzle 25 may be formed integrally with the cap 23 . The injection nozzle 25 is used when discharging the grout material 40 as will be described later.

[0014] Although FIG. 1 shows a configuration in which the cap 23 is fitted onto the outlet 21b of the cylindrical body 21, the cap 23 may be attached by inserting it into the outlet 21b of the cylindrical body 21.

[0015] <3> Stirring blade The stirring blade 30 has an inlet lid 31 that can be attached to and sealed at the inlet 21 a of the cylindrical body 21 , a shaft portion 32 that passes through the inlet lid 31 , and a blade portion 33 that is provided at the tip of the shaft portion 32 .

[0016] <3.1>Entrance cover The inlet lid 31 is a detachable lid for closing the inlet 21 a of the cylindrical body 21 . The inlet lid 31 can be attached to the inlet 21a of the cylindrical body 21 by press-fitting or screwing. The inlet lid 31 is not essential, and may be omitted in some cases.

[0017] <3.2> Shaft The shaft portion 32 is a rod having a length equal to or greater than the axial length of the cylindrical main body 21 . In practice, in order to accommodate the dimensions of the cylindrical body 21 described above, a steel rod having a diameter of 8 mm and a total length of 370 mm is used for the shaft portion 32. The shaft portion 32 passes through the inlet lid 31 so as to be slidable. The shaft portion 32 has a blade portion 33 at its tip. The base end of the shaft portion 32 can be attached to a rotary chuck 51 of a rotary tool 50 such as a driver drill (see FIG. 3).

[0018] <3.3> Blade section The blade portion 33 is made up of a plurality of inclined blades 35 that protrude radially in the radial direction from the tip of the shaft portion 32. The inclined blades 35 are made up of strips with uniform width and thickness. In order to accommodate the dimensions of the cylindrical body 21 described above, the inclined blades 35 are made of steel plates having a thickness t of 1.2 mm and a plate width L1 of 21 mm.

[0019] <4> Optimal mixing conditions In the present invention, we focused on the workability and mixability required to obtain a high viscosity grout material 40, and after repeated intensive experiments on the mixing conditions required to achieve these, we discovered the mixing elements and preferred mixing conditions.

[0020] The stirring elements are as follows: A) Number of inclined blades 35 a) Inclination angle θ of the inclined blade 35 C) Relationship between the inner diameter of the cylindrical body 21 and the diameter of the blade portion 33 d) Number of reciprocations of the stirring blade 30 The optimum conditions for each of these stirring elements will be described with reference to FIG.

[0021] <4.1> Number of inclined blades The blade portion 33 is preferably composed of three to four inclined blades 35 .

[0022] If there are two inclined blades 35, eccentricity of the inclined blades 35 is likely to occur during stirring, further reducing the stirring efficiency. If the number of inclined blades 35 is five or more, the stirring resistance increases as the number of inclined blades 35 increases, and the adjustment cost also becomes high.

[0023] <4.2> Inclination angle of the tilted blades The inclined wing 35 is inclined at a predetermined inclination angle θ with respect to the horizontal line. It is desirable to set this inclination angle θ in the range of 30° to 45°.

[0024] If the inclination angle θ of the inclined blades 35 is less than 30°, the stirring resistance is reduced, but there is a problem that the mixing of the grout material 40 in the cylindrical body 21 is poor, resulting in a decrease in stirring efficiency. If the inclination angle θ of the inclined blades 35 is greater than 45°, the stirring resistance increases, making it difficult to stir inside the cylindrical main body 21.

[0025] <4.3> Dimensional relationship between the inner diameter of the cylinder body and the diameter of the blade When the inner diameter of cylindrical main body 21 is d1 and the diameter of blade portion 33 is d2, it is desirable that the diameter d2 of blade portion 33 has a dimensional relationship of 85 to 89% of the inner diameter d1 of the cylindrical main body. In practice, the inner diameter d1 of the cylindrical body 21 corresponds to 96 mm, so the diameter d2 of the blade portion 33 is 84 mm.

[0026] If the dimensional relationship between the diameter d2 of the blade portion 33 and the inner diameter d1 of the tube body 21 is less than 85%, there is a problem that the grout material 40 on the side of the tube body 21 will not mix well, and if the dimensional relationship between the diameter d2 of the blade portion 33 and the inner diameter d1 of the tube body 21 is more than 89%, there is a problem that the grout material 40 cannot move from the side of the tube body 21 when it is pulled up in a reciprocating motion, resulting in increased stirring resistance.

[0027] <4.4> Relationship between blade width and blade diameter of inclined blade The relationship between the diameter d2 of the blade portion 33 and the blade width L1 is 20% to 30%. Use steel plates. In practice, when the plate width L1 of the inclined blade 35 is 21 mm, the diameter d2 of the blade portion 33 is preferably 84 mm.

[0028] If the relationship between the blade width L1 and the diameter d2 of the blade portion 33 is less than 20%, the stirring resistance will be small, but the stirring efficiency of the grout material will be low, which will pose the problem of needing to increase the number of reciprocating movements.If the relationship between the blade width L1 and the diameter d2 of the blade portion 33 is more than 30%, the stirring resistance will be large, which will make stirring inside the cylindrical body difficult.

[0029] <4.5> Number of reciprocating movements of the stirring blade In the present invention, stirring is performed by rotating the stirring blade 30 inside the cylindrical body 20 while causing the stirring blade 30 to reciprocate (move up and down) along the axial direction of the cylindrical body 20 . The number of reciprocating movements of the stirring blade 30 is set to 10 to 20 times, and more preferably 15 times.

[0030] If the number of reciprocating motions of the agitator blade 30 is less than 10, there is a problem that uneven mixing of the grout material 40 occurs between the upper and lower parts of the cylindrical body 21, and if the number of reciprocating motions of the agitator blade 30 exceeds 20, the amount of air in the grout material 40 increases, causing the grout material 40 to scatter when discharged from the discharge part, leading to reduced workability. If the number of mixing times is not limited, there will be a problem that the fresh properties of the grout material 40 after mixing will be likely to vary depending on the worker.

[0031] <5> Grout raw material A high viscosity grout material 40 is prepared by stirring hydraulic powder 41 and liquid 42. In the present invention, "high viscosity" means a physical property (flow value) in which the grout material 40 does not drip continuously from inside the cylindrical body 21 when the injection nozzle 25 is pointed downward (a state in which there is no dripping or sagging at all, or a state in which there is almost no dripping or sagging).

[0032] The hydraulic powder 41 and liquid 42 constituting the grout material 40 can be appropriately selected depending on the intended use (adhesive anchor material, solidifying material, waterproofing material, joint material, repair material, etc.). The hydraulic powder 41 and the liquid 42 may be weighed out in the amounts to be mixed and sealed in a bag or bottle in advance.

[0033] The hydraulic powder 41 means a powder that hardens upon contact with water or the like, and preferably, at least one type of powder selected from the group consisting of, for example, Portland cement, calcium silicate, calcium aluminate, calcium fluoroaluminate, calcium sulfoaluminate, calcium aluminoferrite, calcium phosphate, hemihydrate or anhydrous gypsum, and self-hardening quicklime powder can be used. The hydraulic powder 41 is not limited to the above-mentioned materials, but may include any known hardenable powder.

[0034] The liquid 42 can be appropriately selected depending on the physical properties of the hydraulic powder 41 .

[0035] [How to adjust grout material] A method for preparing the grout material 40 using the simple stirring unit 10 will be described with reference to FIG.

[0036] <1> Adding grout material (Figure 3(A)) A cylindrical body 20 is prepared in which an inlet 21a of a cylindrical main body 21 is blocked by a piston 22, and the cylindrical body 20 is held vertically with an outlet 21b, which remains open, facing directly upward. A predetermined amount of hydraulic powder 41 (for example, 2350 g of cement powder) and liquid 42 (400 g of water) are introduced through the outlet 21 b of the cylindrical body 20 . The outlet 21b of the cylindrical body 20 has a large opening dimension, so that the hydraulic powder 41 and the liquid 42 can be easily introduced. The hydraulic powder 41 may be added all at once, but adding it in several portions (for example, 820 g in the first portion and 1530 g in the second portion) improves the agitation properties.

[0037] <2> Setting the stirring blade (Figure 3(B)) After the blade portion 33 of the stirring blade 30 is housed in the cylindrical body 21, the inlet lid 31 is fitted into the outlet 21b of the cylindrical body 21 to seal it. Since hydraulic powder 41 and liquid 42 are placed inside the cylindrical body 21, the blade portion 33 is located at the top of the cylindrical body 21. Most of the stirring blade 30 protrudes outside the inlet lid 31.

[0038] <3> Stirring and mixing (Figure 3(C)) A rotary tool 50 is connected to the base end of the shaft portion 32 . With the cylindrical body 20 restrained from falling over, the stirring blade 30 is rotated in a specific direction and the stirring blade 30 is repeatedly raised and lowered. The rotary tool 50 is, for example, a driver drill (ACD-280A manufactured by Shinko Seisakusho, rotation speed 0 to 790 min -1 ), variable speed vibration drill (Shinko Seisakusho SVV-130A, rotation speed 300~2,100 min -1 ), Cordless vibration driver drill (Hikoki FDV18DA, rotation speed 1,400 min -1 ) can be used.

[0039] Generally, the resistance to stirring is extremely large in the initial stage of mixing the hydraulic powder 41 and the liquid 42 . In the present invention, the blade portion 33 is made up of a plurality of inclined blades 34 that are resistant to stirring resistance, so that efficient stirring and mixing can be achieved even in the initial stage of mixing. In particular, in the present invention, the number of inclined blades 35, the inclination angle θ of the inclined blades 35, and the relationship between the inner diameter of the tube body 21 and the diameter of the blade portion 33 are set to specific dimensions, so that compared to conventional mixers, the hydraulic powder 41 and liquid 42 can be mixed and stirred more efficiently, and a grout material 40 with high viscosity properties (flow value (JIS R 5201: 180 plus or minus 10 mm), unit volume mass (JIS A 1171: 2.1 plus or minus 0.10)) can be obtained.

[0040] Furthermore, if stirring is performed while the blade portion 33 is held in a fixed position, the stirring range is limited to a small area, but by raising and lowering the stirring blade 30 within the cylindrical body 20, no unstirred areas are created, and stirring can be performed uniformly not only at the top and bottom of the cylindrical body 20 but also along the entire length of the cylindrical body 21. In particular, since the blade portion 33 is made up of the high-strength inclined blades 35, stirring is possible without deforming the inclined blades 35 even if the stirring resistance is large.

[0041] Furthermore, by setting the number of times the stirring blade 30 is raised and lowered to a specific number (for example, 15 times), even beginners can eliminate uneven mixing of the kraut material 40 and stir it homogeneously, and furthermore, the kraut material 40 can be adjusted to a predetermined viscosity flow value (for example, JIS R 5201:180 plus or minus 10 mm).

[0042] After the mixing operation is completed, the mixing blade 30 is removed from the cylindrical body 20 to complete the preparation of the grout material 40.

[0043] [Grout injection method] A method for injecting the grout material 40 will be described with reference to FIG.

[0044] <1> Set the injection nozzle (Figure 4(A)) A cap 23 and an injection nozzle 25 are attached to the upwardly facing outlet 21b of the cylindrical body 20 which is oriented vertically.

[0045] <2> Setting into injection gun (Fig. 4(B)) The cylindrical body 20 containing the grout material 40 is attached to an injection gun 60 . The injection gun 60 is a known caulking gun. The injection gun 60 illustrated in this example has a storage section 61 that stores the cylindrical body 20, a pressing section 62 that presses the piston 22 of the cylindrical body 20, a pressing shaft 63 connected to the pressing section 62, and a gripping lever 64 that moves the pressing shaft 63 in the axial direction.

[0046] <3> Injection of grout material (Figure 4(B)) By gripping the gripping lever 64, the worker can press the piston 22 attached to the cylindrical body 20, thereby discharging the grout material 40 from the injection nozzle 25 to a predetermined location.

[0047] <4> Grout injection direction For example, if a low viscosity grout material is to be prepared, stirring by the stirring blade 30 of the present invention is not necessary. The simple stirring unit 10 of the present invention is suitable for preparing a high viscosity grout material 40. Since the grout material 40 in the cylindrical body 20 has high viscosity, the grout material 40 discharged through the injection gun 60 is unlikely to fall under its own weight. Therefore, it is now possible to easily carry out not only horizontal construction, which has been considered difficult up until now, but also upward construction and hole filling construction as shown in Figure 4(B).

[0048] <5> Other features of the simple mixing unit In addition to the effects already described, the simple stirring unit 10 has the following characteristics.

[0049] a) The inside of the tube body is easy to clean after work is completed. When accessories such as the piston 22 and the cap 23 are removed from the cylindrical body 21, the inlet 21a and the outlet 21b of the cylindrical body 21 are opened, making it easier to clean the inside of the cylindrical body 21.

[0050] a) The piston and cylinder body can be reused, reducing waste. Conventional mixers have a cylindrical body with a bottom on one side, so after the grouting work is completed, not only the cylindrical body but also the piston is disposed of as waste.

[0051] In contrast to this, in the present invention, the piston 22 can be removed from the cylindrical body 21, so that the piston 22 and the cylindrical body 21 can be reused any number of times, thereby reducing waste.

[0052] [Example 2] Other embodiments will be described below, and in the description, the same parts as those in the first embodiment will be given the same reference numerals and detailed description thereof will be omitted.

[0053] 1. Other bottomed structures of the cylinder body In the first embodiment, the piston 22 is attached to the inlet 21a side of the cylindrical main body 21 to form a bottomed structure. However, the bottomed structure of the cylindrical main body 21 is not limited to the first embodiment. Another bottomed structure of the cylindrical body 21 will be described with reference to FIGS.

[0054] <1> Bottom structure of the tube body FIG. 5 shows another cylindrical body 20. The cylindrical body 21 has an inlet 21a on one side and a bottom surface 26 on the other side. A discharge portion 24 is integrally formed on a part of the bottom surface 26 of the cylindrical main body 21 . The discharge portion 24 has a narrowed bottom surface 26 that protrudes outward and communicates with the inner space of the cylindrical body 21 .

[0055] <2> Mounting member for protrusion In this example, a plug lid 27 or an injection nozzle 25, which are separate members, can be selectively attached to the discharge portion 24. The plug lid 27 is used to close the discharge port 24 when the grout material 40 is being mixed.

[0056] 2. Grout preparation method A method for preparing the grout material 40 will be described with reference to FIG.

[0057] <1> Adding grout material (Figure 6(A)) In the previous Example 1, the grout material was introduced through the outlet 21b of the cylindrical body 21 facing directly upward, but in this example, the inlet 21a of the cylindrical body 21 is oriented directly upward, and the grout material is introduced through the inlet 21a.

[0058] In this example, before the grout material is added, the discharge port 24 of the cylindrical body 21 is sealed with a plug lid 27, and a predetermined amount of hydraulic powder 41 and liquid 42 is added through the inlet 21a.

[0059] <2> Set the stirring blades and stir (Figure 6(B)) After the blade portion 33 of the stirring blade 30 is housed in the cylindrical body 21, the inlet lid 31 is fitted into the inlet 21a of the cylindrical body 21 to close it.

[0060] The stirring step is the same as in the first embodiment, in which a rotary tool 50 is connected to the upper end of the shaft 32 and the stirring blade 30 is repeatedly raised and lowered while rotating within the cylindrical body 21.

[0061] <3> Setting on injection gun After adjusting the grout material 40, the mixing blade 30 is removed from the cylindrical body 20, and the piston 22 is inserted into the inlet 21a of the cylindrical body 21 to close it. Then, the cylindrical body 21 is turned upside down, and the plug 25 of the discharge part 24 is removed and replaced with the injection nozzle 25. The process of attaching the cylindrical body 20 containing the grout material 40 to the injection gun 60 shown in FIG. 4 and injecting the grout material 40 is the same as in the first embodiment.

[0062] 3.Effects of this example In this example, the following effects are achieved in the same manner as in the first embodiment. <1> High viscosity kraut material 40, which has been difficult to adjust up until now, can be efficiently stirred and adjusted in a short time. <2> The high viscosity grout material 40 can be easily prepared by anyone, not just by a highly skilled professional. <3> Since the viscosity of the grout material 40 can be adjusted to be high, the adhesion of the grout material 40 is improved. Therefore, it can easily be used for horizontal and upward construction, which was difficult to do with low-viscosity grout prepared using conventional technology. <4> When the grout material 40 is stirred, the discharge portion 24 of the cylindrical body 21 is closed with the plug lid 27, so that the large diameter inlet 21a of the cylindrical body 21 can be positioned facing upward. Therefore, the stirring blade 30 can be easily inserted into the cylindrical body 21 through the inlet 21 a of the cylindrical body 21 . [Explanation of symbols]

[0063] 10. Simple mixing unit 20...Cylinder 21....Cylinder body 21a...Entrance 21b...Exit 22. Piston 23····Cap 24...Discharge part 25 Injection nozzle 26 Bottom 27...bottom lid 30....Agitating blade 31...Entrance cover 32 Shaft 33 Blade section 34 Square column 35...slanted wing 40 Grout material 41... Hydraulic powder 42...Liquid 50 Rotary tools 60 Injection gun

Claims

1. A simple mixing unit comprising at least a cylindrical body and a mixing blade that can be inserted into the cylindrical body, and which mixes hydraulic powder and liquid introduced into the cylindrical body with the mixing blade to prepare a high-viscosity grout material, The cylindrical body has a bottomed structure that allows one end to be opened, so that it can be used as a stirring container for grout material, and also has an injection nozzle attached to one end, which can be loaded into an injection gun and used as a dispensing container for grout material. The stirring blade has at least a shaft portion having a length equal to or longer than the shaft length of the cylindrical body, and a blade portion provided at the tip of the shaft portion, The blade portion is composed of a plurality of inclined blades protruding radially from the tip end of the shaft portion in the radial direction, The inclined blade is made of a strip, The tilted wing is tilted at a predetermined tilt angle relative to the horizontal line, The diameter of the blade portion is smaller than the inner diameter of the tube body, The blade width of the inclined blade is smaller than the diameter of the blade portion. Simple stirring unit.

2. 2. The simple stirring unit according to claim 1, wherein the stirring blade has an inlet lid that can be attached to the opening at the other end of the cylindrical body and closed, and the shaft portion slidably passes through the inlet lid.

3. 2. The simple stirring unit according to claim 1, wherein an opening is formed at one end of the cylindrical body, and the opening is closed by a piston to give the cylindrical body a bottomed structure.

4. 2. The simple stirring unit according to claim 1, wherein a bottom surface is formed at one end of the cylindrical body, and a discharge portion formed by raising a portion of the bottom surface is sealed with a plug cap, giving the cylindrical body a bottomed structure.

5. The simple stirring unit according to claim 1, wherein the inclination angle of the inclined blades is 30° to 45°.

6. 2. The simple stirring unit according to claim 1, wherein the blade portion has three or four inclined blades.

7. 2. The simple stirring unit according to claim 1, wherein the diameter of the blade portion is 85 to 89% of the inner diameter of the cylindrical body.

8. 2. The simple stirring unit according to claim 1, wherein the blade width of the inclined blade is in a dimensional relationship of 20% to 30% with respect to the diameter of the blade portion.

9. A method for preparing grout using a simple stirring unit that includes at least a cylindrical body and a stirring blade that can be inserted into the cylindrical body, and that stirs hydraulic powder and liquid introduced into the cylindrical body with the stirring blade to prepare grout, Using the simple stirring unit according to claim 1, When stirring the hydraulic powder and the liquid in the cylindrical body, the stirring blade is reciprocated multiple times along the cylindrical body. How to adjust grout materials.

10. The method for preparing grout material according to claim 9, characterized in that the number of reciprocating movements of the stirring blade is 10 to 20 times.

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