Spraying material and spraying system for spraying the material

Abstract

To provide a spraying material that can be supplied in large quantities to a spraying nozzle via a supply pipe without blocking the supply pipe, and a spraying system for spraying the spraying material (for example, onto a slope). The spraying material (1) of the present invention includes a growth substrate material (2) and sandy soil (3), and when the spraying material is sprayed onto a slope (40) and the volume of the growth substrate material (2) is reduced (for example, within a range of 30 to 70%), the total volume of the growth substrate material (2) and the sandy soil (3: the volume does not decrease even when the spraying material 1 is sprayed onto the slope) remains constant (a predetermined volume: for example, 1000 liters or 1 m 3 ), and the total volume of the reduced growth substrate (2) and sandy soil (3) is 1000 liters (= 1 m 3 ) the volume content of the growth substrate material (2) is 250 to 750 liters.

Description

[Technical Field]

[0001] The present invention relates to a spraying method for spraying a spraying material to protect a slope, and in particular to a slope greening technique for covering the slope with vegetation to prevent erosion and suppress weathering of the slope. [Background technology]

[0002] The spraying method is widely used (see, for example, Patent Documents 1 to 3), and slope greening techniques that cover slopes with vegetation to prevent erosion and weathering of the slopes are also being implemented in various places. Here, the spraying method is based on the premise that it will be carried out by hand, and there is a limitation in that if the amount of air (amount discharged per unit time) is too large, the recoil of the sprayed material will become too great, and it will be impossible to hold the hose or other piping materials by hand. Therefore, there is a limit to the amount of sprayed material that corresponds to the amount of air (for example, 10 m 3 This was the reason why large-volume construction (up to 1000 m / h) was difficult. Furthermore, because the piping material had to be held by hand, there were restrictions on the diameter of the piping (hose diameter), with an upper limit of around φ50 (inner diameter 50 mm), which also limited the amount of spray material that could pass through the piping, which was another reason why large-volume construction was not possible. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-98648 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-163258 [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-41295 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been proposed in consideration of the problems of the prior art described above, and aims to provide a spraying material that can be used in large volumes and a spraying system for spraying that material (for example, onto slopes). [Means for solving the problem]

[0005] The spraying material (1) of the present invention comprises a growth base material (2) and sandy soil (3), When the sprayed material (1) is sprayed onto the slope (40) and the volume of the growth base material (2) is reduced, the total volume of the growth base material (2) and the sandy soil (3: the volume of the sandy soil does not decrease even when the sprayed material 1 is sprayed onto the slope 40) is 1000 liters (predetermined volume: for example, 1000 liters or 1 m 3 The sprayed base material (2) of the present invention is characterized in that the volume content of the growth base material (2: the growth base material that has been sprayed onto the slope 40 and reduced in volume) is 250 to 750 liters per sprayed material (1). In other words, in the sprayed base material (2) of the present invention, the volume of the growth base material (2) is within the range of 25 to 75% of the volume of the sprayed material (1).

[0006] In the present invention, the growth substrate (2) is preferably a growth substrate mainly composed of bark compost. However, in the present invention, the growth substrate (2) may be a growth substrate made of uncomposted chip material (wood chips). Here, for general growth substrates, including those mainly made of bark compost, the compression rate, which is the rate at which the volume is reduced when the sprayed material (1) is sprayed onto the slope (40), is 1 / 2. However, for growth substrates made of uncomposted chipped material, the compression rate is 2 / 3. In the present invention, the bonding agent includes any one of cement, liquid bonding agent, and powder bonding agent, Cement content is 20-80 kg / m 3 , the content of liquid adhesive is 4~6kg / m 3 , the powder binder content is 1~2kg / m 3 It is preferable that: In the present invention, the sandy soil (3) is preferably made of fine aggregate.

[0007] The spraying system (100) of the present invention is a spraying system (100) that sprays the above-mentioned spraying material (1: the spraying material according to any one of claims 1 to 3) (for example, onto a slope 40), The rotary spraying machine (4) uses air discharged from a compressor (11) to pressure-feed a spray material (1) through a spray material pipe (12) to a spray nozzle (17), The rotary spray machine (4) includes a hopper (5: spray material hopper) into which the spray material (1) conveyed from a spray material supply system (15) is introduced; The spraying device is provided with a bowl (6: rotor) located below the hopper (5) and having a plurality of chambers (7: partitioned spaces) to which the spraying material (1) is supplied from the hopper (5), The chamber (7) of the bowl (6) moves in the circumferential direction of the bowl (6: rotor) and moves between a position (P1) where the spray material (1) in the hopper (5) is supplied and a position (P2) where the spray material is pressure-fed to the spray nozzle (17) by air discharged from the compressor (11), The hopper (5: hopper for spray material) is characterized in that a material charging auxiliary device (8) is provided inside the hopper (5) to assist in storing the spray material (1) in the hopper (5) into the bowl (7).

[0008] Here, the material feeding auxiliary device (8) comprises a main body (8A) having a rotating body shape and a protruding portion (8B) protruding radially outward from the main body (8A), The main body (8A) is configured to be rotatable around a rotation axis (8C) (of a rotating body shape constituting the main body (8A)), The protruding portion (8B) has a plurality of lengths protruding outward in the radial direction, It is preferable that the protrusion (8B) has the functions of abutting against the partition (7A) of the chamber (7) to convert the movement of the chamber (7) into the rotational movement of the main body (8A), pressing the spray material (1) in the hopper (5: hopper for spray material) into the chamber (7), and loosening the spray material (1) in the hopper (5).

[0009] In the system (100) of the present invention, it is preferable to provide a receiver tank (9) having a function of storing the air discharged from the compressor (11) and eliminating pulsation in the discharged air. [Effects of the Invention]

[0010] According to the spraying method of the present invention having the above-mentioned configuration, the inclusion of sandy soil (3) reduces the proportion of fibrous material contained in the spraying material (1), reduces the compression rate, and makes it difficult for bridging to occur. Furthermore, the pumpability of the material is improved, making it possible to carry out large-volume construction (for example, 10 m) in which a large amount of spraying material is sprayed, which was difficult with conventional techniques. 3 / h), and it has become possible to efficiently carry out spraying work using a construction machine (30: spraying machine) without relying on the manual labor of workers. Here, in the present invention, even if the volume of the growth base material (2) is reduced when the sprayed material (1) is sprayed onto the slope (40), when the total volume of the reduced growth base material (2) and the sandy soil (3) is 1000 liters, the volume content of the growth base material (2) is 250 liters or more, so the density of the sprayed material (1) sprayed onto the slope (40) does not increase, making the slope hard and preventing poor plant growth. On the other hand, when the total volume of the reduced growth substrate material (2) and the sandy soil (3) is 1,000 liters, the volume content of the growth substrate material (2) is 750 liters or less and the volume content of the sandy soil (3) is 250 liters or more, so the effect of improving pumpability by mixing sandy soil can be reliably achieved.

[0011] The spraying system (100) of the present invention, which sprays the spraying material (1: the spraying material of claim 1), uses a rotary spray machine that is structurally capable of large-volume discharge, and is also provided with a material input auxiliary device (8) that assists in storing the spraying material (1) in the hopper (5: spraying material hopper) in the bowl (6), making it possible to store the spraying material (1) at a high density in each chamber (7).Since the spraying material (1) is stored at a high density in the chambers (7), when it is pressurized and fed by air from the compressor (11), the pumped amount (flow rate) of the spraying material (1) is increased, enabling efficient pumping and stable pumping. That is, according to the present invention, for example, 10 m 3 This makes it possible to carry out large-volume construction work of up to 1000 m / h. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is an explanatory diagram showing a spraying system for spraying a spraying material according to an embodiment. [Figure 2] FIG. 2 is an explanatory diagram of a spray nozzle used in the spray system of FIG. [Figure 3] FIG. 2 is an explanatory diagram of a rotary spray machine used in the spray system of FIG. 1. [Figure 4] FIG. 4 is an explanatory diagram of the hopper, rotor, and material feeding auxiliary device of the rotary sprayer of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, a spraying material according to an embodiment of the present invention will be described. The spraying material 1 according to the embodiment of the present invention contains sandy soil 3 to the extent that it does not adversely affect plant growth. By mixing sandy soil 3, the fibrous content in the spraying material 1 is reduced, the compressibility is also reduced, and bridging is less likely to occur. This also improves the pumpability of the spraying material 1. On the other hand, the spraying material 1 according to the embodiment does not contain water. The spraying material according to the embodiment is supplied to the spraying nozzle 17 at the tip of the arm 31 of the spraying machine 30 by the spraying material piping 12 (flexible supply piping) shown in Figure 1, and is sprayed from the spraying nozzle 17 onto the slope 40. If the spraying material 1 according to the embodiment contains water, its viscosity will increase, and resistance will increase as it passes through the flexible supply piping 12, which may result in blocking (occlusion) of the spraying material piping 12. However, as will be described later with reference to Figure 2, the spraying material 1 is not mixed with water while moving through the spraying material piping 12, and its viscosity will not increase. An example of the composition of the spraying material 1 according to this embodiment is shown in Table 1 below. Table 1 TIFF2026044291000002.tif22116

[0014] The mix ratio in Table 1 is determined on the assumption that when the growth base material 2 in the spraying material 1 is sprayed onto the slope 40 (Fig. 1), its volume is reduced to half (compressed). Here, the volume of the sandy soil 3 does not decrease when it is sprayed onto the slope 40. The composition of Table 1 is 1m 3 When the sprayed material 1 is sprayed onto the slope 40 and the volume of the growth base material 2 is reduced (for example, to half), the total volume of the growth base material 2 and the sandy soil 3 is 1000 liters (= 1 m 3 : specified volume). And, in the remarks column of Table 1, "Total 1 m 3 The phrase "mixed so that the total volume of the growth base material 2 and the sandy soil 3 becomes 1000 liters (= 1 m) after the spraying material 1 is sprayed on the slope and the volume of the growth base material 2 is reduced" means that 3 This means that the growth base material 2 and the sandy soil 3 are mixed so that

[0015] According to an experiment conducted separately by the inventor, the total volume of the growth base material 2 and the sandy soil 3 that have been sprayed onto the slope 40 and reduced in volume (compressed) by spraying is 1000 liters (=1 m 3 ) when the volume content of the growth substrate 2 is 250 liters / m 3If the volume content of the growth base material 2 is less than 750 liters / m, the density of the sprayed material 1 sprayed on the slope 40 will increase, making it hard and impairing plant growth. 3 If the amount is greater than this, the amount of sandy soil 3 will be reduced, increasing the possibility of clogging the supply pipe 12 (pipe for spraying material: FIG. 1). The formulations in Table 1 are based on the above-mentioned assumptions and the results of the experiments conducted by the inventors. In the mix ratio of Table 1, the growth substrate 2 is compressed to 1 / 2, so the volume after compression is 250 to 750 liters / m 3 Therefore, the volume of sandy soil 3 is 250 to 750 liters / m 3 is set to

[0016] In the illustrated embodiment, as shown in Table 1, when the sprayed material 1 is sprayed onto the slope 40 and compressed to reduce its volume, the volume content of the growth base material 2 is 250 liters or more when the total volume of the growth base material 2 and sandy soil 3 is 1000 liters, so the density of the sprayed material 1 does not increase, the sprayed material does not harden, and plant growth is not impaired. In other words, when the total volume of the compressed growth base material 2 and sandy soil 3 is 1000 liters, the volume content of the growth base material 2 is adjusted to be 250 liters or more, so plant growth in the sprayed material 1 is not impaired. When the total volume of the compressed (reduced in volume) growth base material 2 and sandy soil 3 is 1,000 liters, the amount of sandy soil 3 is set to 250 liters or more, thereby achieving the effect of improving pumpability by mixing in the sandy soil 3.

[0017] As described above, in order to ensure that the sprayed spraying material 1 adheres reliably to the slope 40, the spraying material 1 in the embodiments shown in Tables 1 to 3, for example, contains a bonding agent that functions as a binder. Formulations containing binders are shown in Table 2 below. Table 2 below shows the composition when the growth base material 2 in the sprayed material 1 is sprayed onto the slope 40 and the volume of the growth base material 2 is reduced to half (composition in Table 1) and an adhesive is added. Table 2 TIFF2026044291000003.tif36117

[0018] As shown in Table 2, in the illustrated embodiment, the binder is selected from among cement, a liquid binder, and a powder binder. For example, commercially available ordinary Portland cement (manufactured by, for example, Sanwa Sangyo Co., Ltd., Taiheiyo Cement Corporation, or Nippon Steel Sumitomo Cement Co., Ltd.) can be used as the cement. Commercially available bonding agents (for example, "Kuricoat" manufactured by Kurita Water Industries Ltd., "Lunasol Powder" manufactured by Japan Coating Resins Co., Ltd., "Aibon Powder" manufactured by Aica Kogyo Co., Ltd., "Denkacoat" manufactured by Denka Co., Ltd., or "NC Pond" manufactured by Fatec Co., Ltd.) can also be used.

[0019] As shown in Table 2, the cement content is 20 to 80 kg / m 3 , the content of liquid adhesive is 4~6kg / m 3 , the powder binder content is 1~2kg / m 3 That is, when the spraying material 1 is sprayed onto the slope 40 and the volume of the growth base material 2 is reduced, the total volume of the growth base material 2 and the sandy soil 3 is 1000 liters (= 1 m 3 ) includes one of the following binders: 20 to 80 kg of cement, 4 to 6 kg of liquid binder, or 1 to 2 kg of powder binder. According to the inventor's experiment, the cement content is 20 kg / m 3 Less than or equal to 4 kg / m of liquid adhesive content 3 or less, or the powder binder content is 1 kg / m 3 If the amount is less than this, the sprayed gunning material 1 may flow away from the slope 40 onto which it is sprayed. In other experiments by the inventors, the cement content was 80 kg / m 3 or more than 6 kg / m of liquid adhesive content 3 or the powder binder content is 2 kg / m 3If the amount is greater than this, the effort and cost required to add it will increase, and the amount of cement and solvent (including water) used to dilute the bonding agent will become too large, which may cause the composition of the sprayed material to change.

[0020] The sandy soil 3 used in the spraying material 1 according to the embodiment is shown in Table 3 below. Table 3 TIFF2026044291000004.tif35117

[0021] In the illustrated embodiment, a general growth substrate material mainly composed of bark compost is used as the growth substrate material 2. With such a growth substrate material, the rate at which the volume of the sprayed material 1 is reduced (compression rate) when sprayed onto the slope 40 is 1 / 2. However, growth substrate material made from uncomposted chips can also be used as growth substrate material 2. The compression rate of growth substrate material made from uncomposted chips is 2 / 3. Therefore, even if the volumetric content of the growth substrate material is the same when the volume of the growth substrate material 2 is reduced by being sprayed onto slope 40, the volumetric content of the growth substrate material before being sprayed onto slope 40 differs between the sprayed material made from uncomposted chips and the sprayed material made from a general growth substrate material mainly composed of bark compost. In other words, before being sprayed onto slope 40, the volume of the sprayed material made from uncomposted chips is smaller than that of the sprayed material made from a general growth substrate material mainly composed of bark compost, due to the greater compression rate of the growth substrate material.

[0022] According to the spraying material 1 of the embodiment, by mixing sandy soil 3, the proportion of fibrous material in the spraying material 1 is reduced, the compression rate is reduced, bridging is less likely to occur, and the pumpability of the material is improved. Therefore, it is possible to carry out large-volume construction (a large amount of spraying material 1, for example, 10 m 3 1. / h) can be carried out, and spraying work can be carried out efficiently using a construction machine (for example, the spraying machine 30 in FIG. 1). Furthermore, in an experiment conducted by the inventors (not shown), the erosion resistance of the spray material according to the embodiment was improved compared to the spray material according to the prior art. Furthermore, by using the blends shown in Tables 1 to 3, for example, it was possible to prevent adverse effects on plant growth and to achieve the effect of improving the pumpability of the spraying material 1.

[0023] Next, a spraying system 100 suitable for spraying the above-mentioned spray material 1 will be described with reference to FIGS. FIG. 1 shows a spraying system 100 used to spray a spraying material 1 according to an embodiment onto a slope 40 to be protected. Although not shown in the figure, the prior art was unable to supply a large amount of spray material to the spray nozzle, and only a small amount (for example, 2.5 to 3.0 m 3 / h), workers had to hold the spray nozzle and spray the material onto the slope to be protected. In contrast, in the embodiment of FIG. 1, the spray nozzle 17 is attached to the tip of an arm 31 of a spray machine 30, and the spraying work is performed using the spray machine 30. In FIG. 1, a spraying system generally designated by reference numeral 100 includes a spraying material supply system 10 , a water supply system 20 , and a spraying machine 30 .

[0024] The spraying material supply system 10 includes a compressor 11, a receiver tank 9, a rotary sprayer 4, a spraying nozzle 17 (see Figure 2), a spraying material piping 12, a growth substrate material supply system 13, a sandy soil supply system 14, and a spraying material supply system 15. The rotary spray machine 4 has the function of pressure-feeding (arrow A) the spray material 1 to the spray nozzle 17 via the spray material piping 12 using air discharged from a compressor 11 and supplied via a receiver tank 9. The configuration and operation of the rotary spray machine 4 will be described later with reference to Figures 3 and 4. The growth substrate material supply system 13 has a growth substrate material hopper 13A into which the growth substrate material 2 supplied from a growth substrate material supply source (not shown) is introduced and stored, and a growth substrate material belt conveyor 13B. The growth substrate material belt conveyor 13B is located below the hopper 13A and transports and supplies the growth substrate material 2 supplied from the growth substrate material hopper 13A to a mixer 15A. The mixer 15A constitutes part of the spraying material supply system 15.

[0025] The sandy soil supply system 14 has a sandy soil hopper 14A into which sandy soil 3 supplied from a sandy soil supply source (not shown) is poured and stored, and a sandy soil belt conveyor 14B. The sandy soil belt conveyor 14B is located below the hopper 14A and transports and supplies the sandy soil 3 supplied from the hopper 14A to the mixer 15A. Although not clearly shown, it is possible to install a scale (not shown) between the hoppers 13A, 14A and the mixer 15A and use the scale to measure and adjust the amounts of the growth substrate material 2 and sandy soil 3. Alternatively, the growth substrate material hopper 13A and the sandy soil hopper 14A can each be configured as a hopper with a scale (not shown), and the growth substrate material hopper 13A can measure and adjust the amount of growth substrate material 2, and the sandy soil hopper 14A can weigh and adjust the amount of sandy soil. Alternatively, the growth substrate material 2 and sandy soil 3 can be measured using the bucket of a backhoe (not shown) and then poured into the mixer 15A. The spraying material 1 can be prepared in the proportions shown in Tables 1, 2, and 3. Alternatively, an adjustment device (not shown) can be placed in the mixer 15A, and the amounts of the growth substrate material 2 and sandy soil 3 can be adjusted by the adjustment device (not shown). Although not clearly shown, the bonding agents shown in Table 2 can be mixed in predetermined amounts using, for example, mixer 15A.

[0026] In Figure 1, the spraying material supply system 15 has a mixer 15A and a spraying material belt conveyor 15B. The mixer 15A mixes, homogenizes, and blends the growth substrate material 2 supplied from the growth substrate material supply system 13 and the sandy soil 3 supplied from the sandy soil supply system 14. This produces the spraying material 1. The produced spraying material 1 is transported and supplied to the spraying material hopper 5 of the rotary sprayer 4 by the spraying belt conveyor 15B. In FIG. 1, an air pipe 16 is connected to a rotary spray machine 4 , and a spray material 1 is supplied to the rotary spray machine 4 and is pressure-fed to a spray nozzle 17 via a spray material pipe 12 . A receiver tank 9 is provided in the air pipe 16 connecting the compressor 11 and the rotary spray gun 4. The pressure of the air discharged from the compressor 11 is not constant, and periods of high pressure and low pressure alternate. If the air pressure is not always higher than the "pressure required to prevent the spray material 1 from clogging the spray material pipe 12," there is a risk of the spray material pipe 12 clogging. The receiver tank 9 is provided so that the pressure of the air from the compressor 11 is always higher than the required pressure. The receiver tank 9 stores the air discharged from the compressor 11, eliminates pulsations in the discharged air, and maintains a stable pressure and air volume. Therefore, the air supplied to the rotary spray gun 4 via the receiver tank 9 is always maintained at a pressure higher than the required pressure.

[0027] In Figure 1, water supply system 20 has a water supply source 21 (water tank), a water pump 22, and water piping 23. One end of water piping 23 is connected to water pump 22, and the other end of water piping 23 is connected to spray material piping 12 near the connection position to spray nozzle 17 (junction 18 in Figure 2: not shown in Figure 1). Arrow B indicates the direction in which water is pumped through water piping 23. The spraying machine 30 is placed on or near the slope 40 to be protected, and has an arm 31 with a spray nozzle 17 attached to the tip of the arm 31. The spraying material 1 supplied through the spraying material pipe 12 and the water supplied through the water pipe 23 are mixed in the spray nozzle 17. The spraying machine 30 is configured to spray the spraying material 1 while moving the spray nozzle 17 at the tip of the arm 31 along the slope 40.

[0028] As shown in Figure 2, the spray nozzle 17 is connected to a spray material pipe 12 through which the spray material 1 is pumped, and a water pipe 23 through which water is pumped. Arrows A and B indicate the pumping directions of the spray material 1 and water, respectively, and reference numeral 18 indicates the point where the spray material 1 and water meet (junction joint). To avoid complication of the illustration, the tip of the arm 21 of the spraying machine 30 is omitted in FIG. The spray material 1 that joins with the water at the spray nozzle 17 (junction 18) is sprayed from the spray nozzle 17 onto the slope 40 to be protected. The spray material 1 that has been sprayed onto the slope is shown by hatching.

[0029] As described above, the spraying material 1 is not mixed with water inside the spraying material pipe 12, so the spraying material 1 does not mix with water inside the spraying material pipe 12 and become viscous, and the spraying material 1 does not become clogged inside the spraying material pipe 12 (clog the spraying material pipe 12). The spray material 1 and water are mixed at the spray nozzle 17 (confluence point 18), but since the high pressure of the spray material being pumped and the high pressure of the water coexist, even if the viscosity of the growth substrate material 2 mixed with water increases, the spray nozzle 17 will not be clogged. Furthermore, in the rotary spray machine 4 described later with reference to Figures 3 and 4, the spray material 1 in the feed bowl 6 (rotor) is not mixed with water and its viscosity does not increase, so the spray material 1 is prevented from adhering to the inner walls of the individual chambers 7 of the feed bowl 6.

[0030] Although not clearly shown, the spraying material pipe 12 (pressure-feed hose for the spraying material 1) in the spraying system 100 has an inner diameter φ of 75 mm. A pressure-feed hose with an inner diameter φ of 75 mm is considerably thicker than the pressure-feed hoses used in conventional technology (usually φ = 42 mm). As explained with reference to Figures 1 and 2, conventionally, workers hold the spray hose while performing spraying work, and so the diameter of the pressure hose is set to be relatively small in order to reduce the rigidity of the pressure hose so that the rigidity of the hose does not hinder the worker's movement. In contrast, in the illustrated embodiment, the spray nozzle 17 is operated using a spraying machine 30, so even if a thick pressure hose is used, the movement of the spray nozzle 17 is not hindered. Furthermore, by using a thick pressure hose, in the illustrated embodiment, large-volume construction (for example, 10 m 3 / h) is possible.

[0031] Next, the rotary spray machine 4 used in the spray system 100 shown in FIG. 1 will be described with reference to FIGS. In Figure 3, the rotary spray machine 4 comprises a hopper 5 for spraying material and a bowl (6: rotor) located below the hopper 5 for spraying material, and the bowl 6 has multiple chambers 7 to which the spraying material 1 in the hopper 5 is supplied. The hopper 5 is fed with the spraying material 1 transported by the spraying material belt conveyor 15B (Figure 1) of the spraying material supply system 15 (see Figure 1). The bowl 6 rotates circumferentially (in the direction of arrow C) by a conventionally known drive mechanism (not shown), and the chamber 7 of the bowl 6 moves in the circumferential direction C, moving between the positions indicated by symbols P1 and P2 in Figure 3. Position P1 is the position where the spraying material 1 in the spraying material hopper 5 is supplied. Position P2 is the position where the spraying material 1 in the chamber 7 is supplied into the spraying material piping 12, and air (arrow D) discharged from the compressor 11 (see Figure 1) passes through the air piping 16 (arrow E) and supplies the spraying material 1 in the chamber 7 into the spraying material piping 12 by this air. In other words, position P2 is the position where the spraying material 1 in the chamber 7 is pressure-fed toward the spray nozzle 17 by the air discharged from the compressor 11.

[0032] As shown in Figure 4, a material feeding auxiliary device 8 (rotating blade) is provided inside the spraying material hopper 5, and the material feeding auxiliary device 8 helps the spraying material 1 in the hopper 5 to be stored at a high density in the chamber 7 of the bowl 6. In the example of Figure 4, two material feeding auxiliary devices 8 are provided. The material feeding auxiliary device 8 includes a main body 8A having a rotating body shape (e.g., a cylindrical shape) and a plurality of protrusions 8B protruding radially outward from the main body 8A. The main body 8A is configured to be rotatable around a rotation axis 8C. Here, the rotation axis 8C is the central axis of the rotating body shape (e.g., a cylindrical shape) of the main body 8A. The protrusions 8B protrude radially outward and come in a variety of lengths, with two types available in the embodiment shown in Figure 4: a long length and a short length. The material feeding auxiliary device 8 is located at the bottom of the hopper 5, directly above the chamber 7 that passes through in the direction of arrow C, and the width dimension (the dimension perpendicular to the paper surface in Figure 4) of the protruding portion 8B of the material feeding auxiliary device 8 is set to be the same as or slightly larger than the width dimension of the chamber 7 (the dimension perpendicular to the paper surface in Figure 4). When the bowl 6 rotates in the direction of arrow C (circumferential direction), the protrusion 8B is pressed by the partition 7A between adjacent chambers 7, and the movement of the chamber 7 in the circumferential direction C is converted into rotational movement of the protrusion 8B and the main body 8A (arrow G in Figure 4).

[0033] In Figure 4, the material feeding auxiliary device 8 (main body 8A and protruding parts 8B: rotating blades) rotates around the rotation axis 8C, so on the right side of the material feeding auxiliary device 8 in Figure 4, the spraying material 1 (which has a relatively low density and is fluffy, so it does not easily fall downward) is forced to move downward by the long and short protruding parts 8B of the rotating blades 8. On the other hand, on the left side of the material feeding auxiliary device 8 in Figure 4, the spraying material 1 is forced to move upward by the long and short protruding parts 8B of the material feeding auxiliary device 8. When moved upward, the spraying material 1 is loosened by the long and short protruding parts 8B of the material feeding auxiliary device 8, so it tends to move downward by its own weight. As a result, the rotational movement of the material feeding auxiliary device 8 makes it easier for the spraying material 1 inside the spraying material hopper 5 to move downward. In addition, the spraying material 1 is pressed into the chamber 7 (from the spraying material hopper 5) by the long and short protrusions 8B of the material feeding auxiliary device 8, so the spraying material 1 can be stored in the chamber 7 at a high density. Since the spraying material 1 can be accommodated at a high density in each chamber 7 of the bowl 6 (rotor), when the spraying material 1 is pressurized with air from the compressor 1 (through the spraying material piping 12), the amount of spraying material 1 can be increased, enabling efficient pressure-feeding and stable pressure-feeding. In FIG. 4, two material feeding auxiliary devices 8 are provided in the spraying material hopper 5, but it is also possible to provide only one or three or more.

[0034] It should be noted that the illustrated embodiments are merely examples and are not intended to limit the technical scope of the present invention. [Explanation of symbols]

[0035] 1. Spraying material 2. Growth substrate 3...sandy soil 4. Rotary sprayer 5. Hopper for spraying material 6. Bowl (rotor) 7. Chamber 7A Chamber divider 8. Material feeding auxiliary device (rotary blade) 8A: Main body of material feeding auxiliary device 8B: Protrusion of material feeding auxiliary device 8C Rotating shaft of material feeding auxiliary device 9. Receiver tank 10. Gunning material supply system 11. Compressor 12. Spray material piping 15. Spraying material supply system 17···Spray nozzle 20...Water supply system 30 Spraying machine 40. Slopes to be protected 100···Spraying System P1: The position where the spraying material in hopper 5 is supplied to the chamber P2: The position where the spray material is compressed and sent to the spray nozzle by the air discharged from the compressor.

Claims

1. Includes growing substrate and sandy soil, The aforementioned growth substrate is a growth substrate mainly composed of bark compost. This spraying material is characterized in that when the volume of the growth base material is reduced by spraying the spraying material onto a slope, the volume content of the growth base material per 1000 liters of the total volume of the growth base material and sandy soil is 250 to 750 liters.

2. The spray material according to claim 1, wherein the growth substrate material is a growth substrate material mainly composed of bark compost.

3. The spray material according to claim 1, wherein the growth substrate material is made of uncomposted chip material.

4. The adhesive includes one of the following: cement, liquid adhesive, or powder adhesive. The cement content is 20-80 kg / m³ 3 The liquid bonding agent content is 4-6 kg / m 3 The powder bonding agent content is 1-2 kg / m 3 A spray material according to any one of claims 1 to 3.

5. The spray material according to any one of claims 1 to 3, wherein the sandy soil is composed of fine aggregate.

6. In a spraying system for spraying a spray material according to any one of claims 1 to 3, It has a rotary spraying machine that uses air discharged from a compressor to pressurize and pump the spraying material to the spraying nozzle via piping for the spraying material, The rotary spraying machine includes a hopper into which the spraying material transported from the spraying material supply system is fed, Located below the hopper, the bowl comprises multiple chambers into which the spray material is supplied from the hopper. The chamber of the bowl moves in the circumferential direction of the bowl, moving between the position where the spray material in the hopper is supplied and the position where it is pressure-fed to the spray nozzle side by air discharged from the compressor, A spraying system characterized in that a material feeding assisting device is provided inside the hopper to assist in storing the spraying material in the hopper into the bowl.

7. The material input assist device comprises a rotating body and a projection that protrudes radially outward from the body, The main body is configured to be rotatable around a rotation axis, The aforementioned protruding portion has multiple lengths that project radially outward. The spraying system of claim 6, wherein the protrusion has the functions of abutting against the partition of the chamber to convert the movement of the chamber into rotational movement of the main body, pressing the spray material in the hopper into the chamber, and loosening the spray material in the hopper.

8. 7. A spray system according to claim 6, further comprising a receiver tank having a function of storing the air discharged from said compressor and eliminating pulsations in said discharged air.

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