JP2009041295A - Slope greening method, and spraying apparatus for slope greening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slope greening method which is free from increased costs caused by upsizing of an apparatus and increased amounts of a spraying material. <P>SOLUTION: According to the slope greening method, a cultivating base material F2 is fed to an air force-feeding passage L4, and the cultivating base material F2 force-fed via the air force-feeding passage L4 is sprayed to a slope 1 to create a lower layer 2. Then seeds F1 are fed to the air force-feeding passage L4 separately from the cultivating base material F2, and the cultivating base material F2 and the seeds F1 force-fed via the air force-feeding passage L4 are sprayed to the lower layer 2 to create an upper layer 3. Herein feeding of the seeds F1 is carried out on an upstream side of a location where the cultivating base material F2 is fed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a slope greening method and a spraying device for slope greening. More specifically, in the slope revegetation method and the slope revegetation method, the growth base material is sprayed onto the slope to create the lower layer, and the growth base material containing seeds is sprayed to the bottom layer to create the upper layer. The present invention relates to a spraying device to be used.

Conventionally, the slope revegetation method generally sprays a growth base material containing seeds on the slope. Specifically, for example, seeds, fertilizers, soil conditioners, etc., and a small amount of water are mixed with a growth base material made mainly of organic substances such as peat moss and bark compost, and this is supplied to the pneumatic route, It is transported by compressed air flowing in this pneumatic feeding path, sprayed from the nozzle provided at the tip of the pneumatic feeding path, and growth base materials mainly made of soil such as viscous soil, sandy soil, seeds, compost, There was a method of mixing a soil improver, an erosion inhibitor and the like with a large amount of water, stirring it in a slurry state and spraying it with a pump.
However, according to the above method, the whole spray layer contains seeds. Nevertheless, the seeds contained in the lower layer of the sprayed layer often do not germinate and are wasted, resulting in high costs.
Therefore, at present, the lower layer is formed by spraying the growth base material not containing seeds on the slope, and then the upper layer is formed by spraying the growth base material containing seeds on the lower layer. The “layer spraying method” is drawing attention. According to this construction method, seeds are not wasted because the lower layer, which is the lower layer of the spray layer, does not contain seeds.

However, in the two-layer spraying method, after the lower layer is formed, the lower layer surface is dried before the upper layer is formed, and the upper layer may collapse from the lower layer. Therefore, water may be sprayed on the surface of the lower layer before forming the upper layer, or a net made of resin, metal, or the like may be provided to prevent the upper layer from collapsing. However, since these methods require new work, the cost is eventually increased. In addition, as a method for preventing the upper layer from collapsing, there is also a method in which a growth base material containing seeds for forming the upper layer is sprayed as a slurry. However, this method has a problem that the erosion resistance of the upper layer is lowered because the upper layer contains a large amount of moisture. Moreover, since the physical properties are completely different between the spraying material for the upper layer construction and the spraying material for the lower layer construction, separate spraying devices must be prepared for each, resulting in cost. Leading to high.
Therefore, various studies have been made to determine whether the upper layer can be formed before the lower layer surface is dried. Here, in the first place, in the conventional two-layer spraying method, the surface of the lower layer is dried because the conventional method creates the lower layer over the entire slope to be constructed, and then blows down. The material was changed from the growth base material not containing seeds to the growth base material containing seeds, and then the upper layer was created, and it took time until the upper layer was created after the lower layer was created. .
Based on such knowledge, the storage tank for the growth base material that does not contain seeds, the storage tank for the growth base material that contains seeds, the supply of the growth base material that does not contain seeds, and the growth base material that contains seeds There has been proposed a method of performing spraying using a spraying device provided with a switching means for switching between the supply of (see, for example, Patent Document 1 and Patent Document 2). When the spraying device is used, the operation can be changed from the lower layer formation to the upper layer formation or from the upper layer formation to the lower layer formation only by switching by the switching means. Therefore, it is possible to shorten the time from the formation of the lower layer to the formation of the upper layer by setting the range to be constructed at a time as a part of the slope to be constructed. The switching by the switching means may be performed automatically or manually by using the amount of spraying material and the spraying time as factors.

However, this method requires two storage tanks, both of which are large enough to accommodate the growth base material, so that the spraying device is enlarged as a whole, and a large space for installing the device is required. turn into.
Therefore, a slope greening method has been proposed in which the spraying device to be used is downsized (see, for example, Patent Document 3). This slope greening method uses the following spraying device.
That is, as shown in FIG. 5, the spraying device 100 includes a seed storage tank 101 that does not store the growth base material F2 and stores the seed F1, and a base material that does not store the seed F1 and stores the growth base material F2. A storage tank 102 and a pneumatic feed path 103 through which compressed air A flows are provided. The growth base material F2 is supplied from the growth base material storage tank 102 to the pneumatic feed path 103, and downstream from the seed storage tank 101. The seed F1 is supplied. Further, the spraying device 100 includes a switching means for switching between the seed F1 supply state and the seed F1 supply stop state between the seed storage tank 101 and the seed F1 supply port 104A formed in the pneumatic feeding path 103. It is provided in between. Further, in the spraying device 100, in addition to the pneumatic feeding path 103 and the base material storage tank 102, the air compression means 105 that pumps the compressed air A to the seed storage tank 101, the seed storage tank 101, and the pneumatic delivery path. 103 is provided with a seed introduction pipe 104 communicating with 103, and a spiral screw conveyor (not shown) is provided inside the seed introduction pipe 104. And if the said screw conveyor is driven using the previous switching means, the seed F1 will be supplied in the pneumatic feed path 103 from the seed storage tank 101. FIG. On the other hand, in order to reduce the resistance applied to the compressed air A, the pneumatic feeding path 103 has a larger diameter in the part 103B downstream from the position where the growth base material F2 of the pneumatic feeding path 103 is supplied. Specifically, the diameter of the portion 103A upstream from the position where the growth base material F2 is supplied is 2.5 to 3.8 cm (1 to 1.5 inches), whereas the diameter of the portion 103B downstream is the diameter. Is 3.8 to 7.6 cm (1.5 to 3 inches). In addition, it is desirable that the diameter of the seed F1 supply port 104A (the diameter of the seed introduction tube 104) is small because the seed F1 is very small compared to the growth base material F2, but if the diameter is small, the supply port Since the growth base material F2 adheres to 104A and the possibility of causing clogging increases, the diameter of the supply port 104A is set to be approximately the same as the diameter of the downstream portion 103B.

However, the spray device 100 and the slope greening method using the same have the following problems.
That is, first, the spraying device 100 is provided with a screw conveyor for supplying the seed F1 into the pneumatic feeding path 103. This is because, in addition to the compressed air A, the growth base material F2 is also circulated in the pneumatic feeding path 103 when the seed F1 is supplied, and therefore it is necessary to force the seed F1 to be pushed out. Therefore, since a small amount of seed F1 must be supplied through the large-diameter seed introduction tube 104 using a screw conveyor, it is difficult to quantitatively supply the seed F1 alone, and a large amount of filler is used. become. Naturally, the heavy use of the extender leads to an increase in cost. Moreover, in the said spraying apparatus 100, it is necessary to send the compressed air A from the air compression means 105 to the seed storage tank 101, and to pressurize the inside. This is because the growth base material F2 may flow into the seed storage tank 101 unless the inside is pressurized. Since the compressed air A is also sent to the seed storage tank 101 in this way, the air compression means 105 is increased in size, and as a result, the entire spraying device 100 is also increased in size. As a result, a large space is required for installing the apparatus, which leads to an increase in cost. Moreover, it is difficult to adjust the pressure in the seed storage tank 101, and a complicated pressure adjusting mechanism is required. This also leads to an increase in cost. Further, when the seed F1 is supplied by a screw conveyor, there is a possibility that the fixed amount may not be supplied due to a rotating phenomenon or the like, and the seed F1 may be damaged by contact with the screw. For this reason, it must be set so that the seed F1 is supplied in a large amount, leading to an increase in cost.
JP-A-8-41887 JP-A-8-41888 Japanese Patent No. 3159376

  The main problem to be solved by the present invention is to provide a slope revegetation method and a face revegetation spraying device that does not cause an increase in cost due to an increase in the size of the device or an increase in the amount of spraying material. There is to do.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
The growth base material is supplied to the pneumatic route, the growth base material pumped through this pneumatic route is sprayed on the slope, and the lower layer is formed. In addition to the growth base material, seeds are also supplied to the pneumatic route. And, it is a slope planting method for creating the upper layer by spraying the growth base material and the seed which are pumped through this pneumatic feeding path to the lower layer,
The slope revegetation method, wherein the seed is supplied upstream of the growth base material.

[Invention of Claim 2]
A pneumatic feeding path for pumping the supplied spraying material, a nozzle for blowing the spraying material fed through the pneumatic feeding path, a means for supplying a growth base material to the pneumatic feeding path, and a seed in the pneumatic feeding path And a means for switching between the supply state and the supply stop state of the seed, a spraying device for slope greening, comprising:
The spray device for slope greening, wherein the seed supply means is provided upstream of the growth base material supply means.

[Invention of Claim 3]
The slope greening according to claim 2, further comprising an air compressing means, wherein compressed air from the air compressing means is sent to the pneumatic feeding path and the growth base material supplying means, but not sent to the seed supplying means. Spraying device.

[Invention of Claim 4]
Diameter of a position where the growth base material of the pneumatic feeding path is supplied> Diameter of a position where the seed of the pneumatic feeding path is supplied, and
Diameter of the position where the growth base material of the pneumatic feeding path is supplied> Diameter of the seed feeding port formed in the pneumatic feeding path,
The spraying device for slope greening according to claim 2 or claim 3, wherein

[Invention of Claim 5]
The seed supply means includes
The seed storage tank that can be sealed, and a quantitative supply device that quantitatively freely drops seeds that have fallen freely from the seed storage tank into the pneumatic feeding path. A spraying device for slope planting according to the item.

[Invention of Claim 6]
The spraying device for slope greening according to claim 5, wherein the quantitative supply device is a rotary valve.

[Invention of Claim 7]
In the case where the seed is a plurality of species,
The spraying device for slope greening according to any one of claims 2 to 6, wherein the supply of one seed is performed upstream of the supply of another seed.

  According to the present invention, it is possible to provide a slope greening method and a slope greening spraying device that do not cause an increase in cost due to an increase in the size of the device or an increase in the amount of spraying material.

Next, an embodiment of the present invention will be described.
[Blowing device]
1-3, the equipment flowchart of the spraying apparatus for slope greening which concerns on this Embodiment was shown. The spraying device includes a mixer 11 for the growth base material F2, a supply means 13 for the growth base material F2, a supply means 14 for the seed F1, a water tank 15, a generator 16 serving as a power source for the apparatus, and an air compression means. The main compressor 17 is installed on the installation surface 4 and becomes the main.

  In this spraying apparatus, the growth base material F2 is once supplied to the mixer 11. Here, the growth base material F2 is a material other than the seed F1, for example, peat moss, bark compost, soil (fertile soil, sandy soil), fertilizer, soil activator, erosion inhibitor, and other additives. Etc. as appropriate. As the growth base material F2, a material mainly composed of an organic composition that directly contributes to the growth of the seed F1 such as a fertilizer, a material mainly composed of soil, and the like are appropriately included depending on the purpose of greening. Can do. When the growth base material F2 is made of a plurality of materials, they are mixed by the mixer 11 to make the properties uniform.

  The growth base material F2 mixed by the mixer 11 is conveyed by the belt conveyor 12 to the supply means 13 for the growth base material F2. As shown in FIG. 3, the supply means 13 includes an upper growth base material storage tank 13 a and a lower growth base material storage tank 13 b in upper and lower stages, a hopper 13 h provided on the upper side of the upper growth base material storage tank 13 a, It has mainly. The growth base material F2 conveyed from the mixer 11 is first supplied into the upper growth base material storage tank 13a through the hopper 13h. The upper growth base material storage tank 13a is provided with a stirring blade S, and the supplied growth base material F2 is stirred by the stirring blade S to promote uniforming of properties. The growth base material F2 stirred in the upper growth base material accommodation tank 13a moves into the lower growth base material accommodation tank 13b provided therebelow by free fall or the like. The lower growth base material storage tank 13b is also provided with a stirring blade S, and the supplied growth base material F2 is stirred by the stirring blade S to further promote homogenization of properties.

  On the other hand, the seed F1 is sent to the seed F1 supply means 14 by an appropriate method, alone or together with the filler. It should be noted that a small amount of the filler is sufficient as compared with the conventional one as will be described later. Moreover, as an extender, it has been confirmed that inorganic materials such as zeolite and foam glass waste are useful.

  In the present embodiment, the seed F1 supply means 14 includes a seed storage tank 14a having an input port 14h for the seed F1, a cut-out tank 14b serving as a quantitative supply device communicating below this, and a pneumatic feeding path L4 communicating below this. And a communication pipe 14c constituting a part of the main body. The seed F1 is introduced into the seed storage tank 14a through the insertion port 14h. Since the seed F1 has a small capacity compared to the growth base material F2, the seed storage tank 14a can also have a small capacity compared to the growth base material storage tanks 13a and 13b. Therefore, the whole spraying device can be reduced in size.

  In this embodiment, a stirring blade S is also provided in the seed storage tank 14a. By the stirring by the stirring blade S, for example, when there are a plurality of seeds F1, the properties can be made uniform. The seed F1, which has been stirred in the seed storage tank 14a, freely falls into a cutting tank 14b provided below the seed F1. A rotary valve R is provided in the cutting tank 14b. By this rotary valve R, the seed F1 is quantitatively cut out into the communication pipe 14c using free fall (quantitative supply). Compressed air A is pressure fed from the compressor 17 through the pressure feeding pipe L1 into the communication pipe 14c. The seed F1 cut out in the communication pipe 14c by the pressure of the compressed air A is pressure-fed toward the slope 1 or the like in the pressure-feeding hose L4 that is a pneumatic feeding path. Note that the pressure of the compressed air A can be adjusted, for example, by adjusting the opening degree of the valve V1 provided in the pressure feeding pipe L1.

  On the other hand, in this embodiment, the compressed air A is also pumped from the compressor 17 through the pressure feed pipe L2 into the upper growth base material storage tank 13a and the lower growth base material storage tank 13b. Due to the pressure of the compressed air A, the growth base material F2 is passed directly from the upper growth base material storage tank 13a and the lower growth base material storage tank 13b (see FIG. 3) or appropriately through a transport hose L5 ( 1), the air is fed in the middle of the pneumatic feeding path L4. In this embodiment, the pressure feed pipe L2 is branched into L2a communicating with the inside of the upper growth base material accommodation tank 13a and L2b communicating with the inside of the lower growth base material accommodation tank 13b, and each is provided with a valve V2 or V3. . By adjusting the opening degree of the valve V2 or V3, it is possible to adjust the amount of compressed air A fed into the upper growth base material storage tank 13a and the lower growth base material storage tank 13b.

  As is clear from the above, in this embodiment, the seed supply means 14 is provided upstream of the growth base material supply means 13, and the supply of the seed F1 is performed upstream of the supply of the growth base material F2. Yes. Therefore, there is no possibility that the growth base material F2 adheres to and clogs the seed F1 supply port (communication portion between the cutting tank 14b and the communication pipe 14c) formed in the pneumatic feeding pipe. As a result, the supply port of the seed F1 can be appropriately sized, and it can be supplied quantitatively without using an extender or in a small amount, and an increase in cost can be suppressed. This means that “the diameter of the position where the growth base material F2 of the pneumatic feeding path L4 is supplied> the diameter of the supply port of the seed F1 formed in the pneumatic feeding path L4”. Further, in this embodiment, from the viewpoint of reducing resistance, “the diameter of the position where the growth base material F2 of the pneumatic feeding path L4 is supplied> the diameter of the position where the seed F1 of the pneumatic feeding path L4 (communication pipe 14c) is supplied”. It has become.

  In addition, when the seed F1 is supplied upstream of the supply of the growth base material F2, the seed storage tank 14a is supplied through the seed F1 supply port even if the seed storage tank 14a is not pressurized. Only the compressed air A flows in, and the growth base material F2 does not flow in. Therefore, it is not necessary to send the compressed air A from the compressor 17 into the seed storage tank 14a, and the compressor 17 can be downsized. If the inside of the seed storage tank 14a does not need to be pressurized, the processing can be started immediately after the seed F1 is introduced into the seed storage tank 14a, and the working efficiency is improved. Furthermore, if the seed storage tank 14a can be sealed by allowing the inlet 14h to be closed as in the illustrated example, the inside of the seed storage tank 14a and the inside of the communication pipe 14c are naturally at the same pressure. Therefore, it is not necessary to provide a complicated pressure adjusting mechanism. In addition, there is no risk that the seed F1 having a relatively low specific gravity will flow backward due to the pressure of the growth base material F2. Therefore, there is no need for a screw conveyor for forcibly sending out the seeds F1, and the spraying device as a whole is downsized in this respect as well. Further, there is no risk that the seed F1 is damaged by a screw or the like.

  By the way, in this embodiment, a to-shaped junction pipe 18 is provided in the middle of the pneumatic feeding pipe L4. As shown in FIG. 3, the junction pipe 18 has a linear portion 18a whose both end openings communicate with the inside of the pneumatic feeding pipe L4, and one end portion communicates from the side to, for example, the central portion of the linear portion 18a. In addition, the other end portion is mainly composed of the transport hose L5 and the connection portion 18b communicating with the supply means 13 of the growth base material F2 (see FIG. 1). If this junction pipe 18 is provided, even if the other transport path is formed of a flexible material such as a transport hose, the effect of preventing the backflow of the seed F1 and the growth base material F2 can be reliably obtained. Installation, arrangement change, etc. become easy. Therefore, the installation surface 4 can be used effectively, which is the same as the overall size reduction of the spraying device.

  When a plurality of seeds F1 are used, as described above, all of the plurality of seeds F1 are put into one seed storage tank 14a and stirred by the stirring blade S provided in the seed storage tank 14a. Can be used with uniform properties. However, the following method is recommended in the case of mixing a plurality of seeds F1 having greatly different shapes, particle sizes, and the like. In the following, a case where the seeds F1 are three types of F1a, F1b, and F1c will be described as an example.

  In this recommended embodiment, as shown in FIG. 4, first, three seed F1 supply means 14 are prepared: a seed F1a supply means 14A, a seed F1b supply means 14B, and a seed F1c supply means 14C. To do. The communication pipe 14c of the means 14A communicates one end with the pressure feed pipe L1 connected to the compressor 17, and communicates the other end with the pneumatic feed path L4. Further, the communication pipe 14c of the means 14B and the communication pipe 14c of the means 14C are sequentially communicated in the middle of the pneumatic feeding path L4 (a state where three supply means 14 of the seed F1 are installed in series).

  According to this form, compressed air A is pumped from the compressor 17 through the pressure feed pipe L1 into the communication pipe 14c of the means 14A, and the seed F1a supplied into the communication pipe 14c of the means 14A by the pressure of the compressed air A The inside of the pneumatic feed path L4 is pumped toward the slope 1 or the like. Further, the seed F1a and the compressed air A are pressure-fed into the communication pipe 14c of the means 14B through the pneumatic feed path L4, and together with the seed F1b supplied into the communication pipe 14c of the means 14B, further inside the pneumatic feed path L4. Pumped toward the slope 1 etc. Further, the seeds F1a and F1b and the compressed air A are pumped into the communication pipe 14c of the means 14C through the pneumatic feed path L4, and together with the seeds F1c supplied into the communication pipe 14c of the means 14C, the inside of the pneumatic feed path L4. Further, it is pumped toward the slope 1 or the like. In other words, in the present embodiment, one seed F1a is pumped through the pneumatic feeding path L4, and other seeds F1b and F1c are supplied in the middle of the pneumatic feeding path L4, and the growth base material F2 is supplied downstream thereof. It is. According to this embodiment, other seeds F1b are mixed in the seed F1a in the dispersed state in the compressed air A, and further, other seeds F1c are mixed in the seeds F1a and F1b in the dispersed state in the compressed air A. Therefore, the seeds F1a, F1b, and F1c are mixed extremely uniformly (homogenization of properties). And since this mixing is not by a screw conveyor, a stirring blade, etc., there is also no possibility that seed F1a, F1b, F1c may be damaged.

  Here, the present inventors have confirmed through tests that the specific gravity and particle size distribution tend to be greatly involved in the mixing property (homogenization of properties) and quantitative supply properties of seeds and fillers. This means that if all the seeds and bulking materials having different specific gravity and particle size distribution are mixed, it is particularly difficult to ensure the quantitative supply ability. Therefore, in order to stabilize the quantitative supply even under such characteristics, a form in which a plurality of seed supply means are installed in the series direction and mixing according to the characteristics of the seeds is derived.

  However, even if there is only one seed supply means, the inside is divided into a plurality of rooms, and various seeds are supplied to each room, that is, a form in which a plurality of seed supply means are integrated. Of course, the same effect can be obtained. In this case, however, it is preferable that a constant amount supply means such as a rotary valve is provided for each room.

[Slope revegetation method]
Next, the slope greening method using the above-described spraying device will be described.
As shown in FIG.1 and FIG.3, in planting the slope 1 using this spraying apparatus, the growth base material F2 which does not contain the seed F1 is sprayed on the slope 1 and the lower layer 2 is formed, The upper layer 3 is formed by spraying the growth base material F2 containing the seeds F1 on the lower layer 2. In forming the upper layer 3, first, the seed F1 is supplied to the pneumatic feeding path L4, and then the growth base material F2 is supplied to the pneumatic feeding path L4. On the other hand, when the lower layer 2 is formed, the growth base material F2 is supplied to the pneumatic feeding path L4 without supplying the seed F1 to the pneumatic feeding path L4. Such switching between the supply state of the seed F1 (when the upper layer 3 is formed) and the supply stop state (when the lower layer 2 is formed) is performed by, for example, switching means for the nozzle N provided at the tip of the pneumatic feeding path L4. When a changeover switch or the like is provided and a spraying worker or the like operates this switch, the rotation of the valve R provided in the seed supply means 14 is adjusted, and the presence / absence / amount of the seed F1 supplied to the communication pipe 14c is adjusted. It is good to do so.

  On the other hand, in this embodiment, the spraying device includes a water tank 15, and the water W in the water tank 15 is transported to the nozzle N through the transport hose L3 by the pump 15a. The water W transported to the nozzle N is sprayed on the slope 1 together with the growth base material F2 and the like. By spraying the water W, the growth base material F2 sprayed on the slope 1 is softened, so that the seed F1 is prevented from rebounding. The water W can be mixed in advance with the growth base material F2 and pumped through the air transport path L4. Normally, this is done, but the pumpability is improved when the amount of water W mixed with the growth base material F2 increases. Since it falls, it is preferable to provide another route for transporting the water W.

[Others]
In the present embodiment, the lower layer 2 and the upper layer 3 are each one layer, but the present invention is not limited to this. For example, first, the growth base material F2 not containing the seed F1 is sprayed to form the lower layer 2, and then the growth base material F2 containing a small amount of the seed F1 is sprayed to create the first upper layer (3). And finally, it can also be set as the 3 layer structure etc. which spray the growth base material F2 which contains seed F1 relatively much, and create the 2nd upper layer (3).

○ In addition to the filler, the seed F1 may be appropriately mixed with one or more of surfactants, water retention materials, repellents, short fibers, colorants, oxygen supply agents, and the like.

In this embodiment, the rotary valve R is used as the seed F1 quantitative supply device. However, the present invention is not limited to this. For example, an extrusion method using a piston, a rotating tray method, a revolver method, and the like can also be used. However, the rotary valve R is preferable because the seed F1 can be quantitatively supplied without being damaged.

Next, examples for clarifying the effects of the present invention will be described.
〔sampling〕
(Example)
First, five kinds of seeds (Nurde, Neubara, Susuki, Medhagi, Sendang) and an extender were put into a seed storage tank, and stirred by a stirring blade provided in the seed storage tank to obtain a spray material. The spray material was supplied in a fixed amount into the pressure feeding hose by a rotary valve, and pneumatically fed toward the tip of the pressure feeding hose. The spray material discharged from the tip of the pressure hose was collected in a sandbag and used as a sample. This sample was collected in three stages, initial, middle and final, based on the remaining capacity of the spray material in the seed storage tank. This takes into account fluctuations in the quantitative supply performance accompanying changes in the remaining capacity of the spray material.
The above operation was performed five times to obtain a total of 15 samples.

(Comparative example)
First, the growth base material was supplied into a pressure feeding hose and pneumatically fed toward the tip of the pressure feeding hose. On the other hand, five kinds of seeds (Nurde, Neubara, Susuki, Medhagi, Sendang) and an extender were put into a seed storage tank, and stirred by a stirring blade provided in the seed storage tank to obtain a seed material. The seed material was quantitatively supplied into the pressure hose by a screw conveyor, and was forcibly mixed with the growth base material in the pressure hose being pneumatically fed. A mixture of the seed material and the growth base material discharged from the tip of the pressure hose was collected in a sandbag and used as a sample. This sample was also collected in three stages, initial, middle and final, based on the remaining amount of seed material in the seed storage tank.
The above operation was performed five times to obtain a total of 15 samples.

[Measurement method]
First, the volume of each sample was measured, and the number of seed grains contained in each sample was visually counted. This count was performed for each seed type.

〔Evaluation methods〕
Since the sample volumes differed slightly, first, the counted number of seed grains was converted into the number of seed grains per fixed volume. Next, the percentage of the number of seed grains with respect to the design value was calculated. Furthermore, the standard deviation was calculated based on these calculated percentages. The standard deviation was calculated by dividing the Examples and Comparative Examples into 2-10 mm seeds (4 types of Nurde, Neubara, Susuki and Medhagi) and seeds exceeding 10 mm (Sendan).

  As a result, the standard deviation of seeds of 2 to 10 mm according to Examples is 36, the standard deviation of seeds exceeding 10 mm is 43, while the standard deviation of seeds of 2 to 10 mm according to Comparative Example is 58, and the standard deviation of seeds exceeding 10 mm is 109. From this, it can be seen that the method according to the example has less variation in the number of seed grains and is superior in quantitative supply ability (property uniformity).

  The present invention uses a slope revegetation method in a form in which a growth base material is sprayed on a slope to create a lower layer, and a growth base material containing seeds is sprayed on the bottom layer to create an upper layer. It can be applied as a spraying device.

It is an equipment flow figure (front view) of a spraying device. It is an equipment flow figure (plan view) of a spraying device. It is the figure which detailed the supply means part of the spraying apparatus. It is a modification of a seed supply means. It is the equipment flow figure (front view) of the conventional spraying apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Slope, 2 ... Lower layer, 3 ... Upper layer, 4 ... Installation surface, 11 ... Mixer, 12 ... Belt conveyor, 13 ... Growth base material F2 supply means, 14 ... Seed F1 supply means, 15 ... Water tank, 16 ... generator, 17 ... compressor, 18 ... confluence pipe, A ... compressed air, F1 ... seed, F2 ... growth base material, L1, L2 ... pressure feed pipe, L4 ... pneumatic feed pipe, W ... water.

Claims (7)

The growth base material is supplied to the pneumatic route, the growth base material pumped through this pneumatic route is sprayed on the slope, and the lower layer is formed. In addition to the growth base material, seeds are also supplied to the pneumatic route. And, it is a slope planting method for creating the upper layer by spraying the growth base material and the seed which are pumped through this pneumatic feeding path to the lower layer,
The slope revegetation method, wherein the seed is supplied upstream of the growth base material. A pneumatic feeding path for pumping the supplied spraying material, a nozzle for blowing the spraying material fed through the pneumatic feeding path, a means for supplying a growth base material to the pneumatic feeding path, and a seed in the pneumatic feeding path And a means for switching between the supply state and the supply stop state of the seed, a spraying device for slope greening, comprising:
The spray device for slope greening, wherein the seed supply means is provided upstream of the growth base material supply means.   The slope greening according to claim 2, further comprising an air compressing means, wherein compressed air from the air compressing means is sent to the pneumatic feeding path and the growth base material supplying means, but not sent to the seed supplying means. Spraying device. Diameter of a position where the growth base material of the pneumatic feeding path is supplied> Diameter of a position where the seed of the pneumatic feeding path is supplied, and
Diameter of the position where the growth base material of the pneumatic feeding path is supplied> Diameter of the seed feeding port formed in the pneumatic feeding path,
The spraying device for slope greening according to claim 2 or claim 3, wherein The seed supply means includes
The seed storage tank that can be sealed, and a quantitative supply device that quantitatively freely drops seeds that have fallen freely from the seed storage tank into the pneumatic feeding path. A spraying device for slope planting according to the item.   The spraying device for slope greening according to claim 5, wherein the quantitative supply device is a rotary valve. In the case where the seed is a plurality of species,
The spraying device for slope planting according to any one of claims 2 to 6, wherein the supply of one seed is performed upstream of the supply of another seed.

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