JP2023049182A - Spray method and spray machine used for the same - Google Patents

Abstract

To provide a spray method which can perform spray work mechanically, and can easily and correctly adjust a distance between a nozzle jetting port and a spray surface, and to provide a spray machine used for the same.SOLUTION: An attachment (1) is mounted on a vehicle. The attachment (1) includes: a tabular member (2) movable in a longer direction and extending in an orthogonal direction; and a spray nozzle (3) movable along the tabular member (2). The spray nozzle (3) is made to follow and move to a surface shape of a slope. In the movement of the nozzle, the attachment (1) is expanded/contracted, the attachment (1) is oscillated, the tabular member (2) is moved in the longer direction of the attachment (1), the spray nozzle (3) is moved along the tabular member (2), the tabular member (2) is rotated with respect to a rotation center in the longer direction of the attachment (1), the spray nozzle (3) is rotated, and a spray distance (L) from a jetting port of the spray nozzle (3) to a spray surface is adjusted.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying method for spraying a spraying material (for example, mortar) onto a spraying surface such as a slope or inner wall surface of a tunnel, and a spraying machine used therefor.

The spraying surface spraying method, in which the spraying material is sprayed on the surface of the spraying surface with many unevenness, was often performed by a worker holding a spraying nozzle and spraying the spraying material on a predetermined location (manual work). .
Here, for example, since a quick-setting agent is added to the sprayed material such as mortar, the shorter the distance to the sprayed surface, the more the sprayed material reaches the sprayed surface before the quick-setting agent acts. This is advantageous because the material hits the spray surface without clumping (so-called "clumps").
However, if the distance from the spray nozzle (spray nozzle) to the surface to be sprayed is too short, in the case of mortar, high-pressure air, mortar, and quick-setting agent will be unevenly distributed within the spray material jet. As a result, it is difficult to uniformly cover the sprayed surface with the sprayed material.
Therefore, it is desired to properly adjust the distance from the spraying material ejection port (spraying nozzle ejection port) to the spraying surface. It is difficult to adjust the distance between the nozzle outlet and the spray surface.
In addition, manual spraying by a worker poses a risk of falling and other dangers, and since the spraying nozzle must be gripped manually, the worker is exposed to danger when the hose is clogged. Furthermore, there is a problem of low work efficiency (for example, the working area per worker is 100 m 2 /day).
On the other hand, if the spraying work is carried out using a machine, the work efficiency is greatly improved compared to the manual work. And the danger to workers is reduced.
Therefore, a self-propelled spray surface spray device (for example, Patent Document 1) has been proposed.

However, the slope spraying device (Patent Document 1) is sometimes manufactured by so-called "one-piece production", and when it is one-piece production, the price is high, and there is a problem that the introduction cost rises. .
In addition, the outriggers of the vehicle must be extended in order to fix the device during the spraying work, and the fixing work by the outriggers takes time.
In addition, since the spray nozzle has a low degree of freedom in the position and direction of spraying, it is difficult to spray the spraying material with a uniform thickness on the surface of the spraying surface with large unevenness. It was difficult to adjust the distance to the surface.

Japanese Patent No. 6454123

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art. The purpose is to provide a spraying method that can be used and a spraying machine used for it.

The spraying method of the present invention is
attaching the attachment (1) to a vehicle (30: including a machine traveling by a track belt);
The attachment (1) comprises a spray nozzle (3),
Having a nozzle position adjustment step of adjusting the position of the spray nozzle (3),
The nozzle position adjustment step is characterized by including a step of adjusting the spray distance (L) from the spray nozzle (3) ejection port to the spray surface (F).
In the present invention, the spraying distance (L) is preferably adjusted to a spraying distance (the distance of the region β: for example, the distance β1) determined by a test using a specimen performed before construction. However, if the number of construction cases increases and data is accumulated, it will be possible to set the spray distance (L) based on that data, and the test using the specimen conducted before construction may become unnecessary. be.

In the present invention, prior to the above step (the step of claim 1), a test using a specimen determines the quick-setting agent (type, amount added), determines the mortar (W / C and other composition), sprays It is preferable to determine the distance (L) between the nozzle and the spray surface (F).

In the spraying method of the present invention,
The attachment (1) includes a plate-like member (2) movable in its longitudinal direction and extending in a direction perpendicular to the longitudinal direction (lateral direction), and a plate-like member (2) movable along the plate-like member (2). Equipped with a spray nozzle (3),
The nozzle position adjustment step includes:
A nozzle moving step of moving the spray nozzle (3) following the surface shape of the spray surface (F),
In the nozzle moving process,
A step of extending and contracting the attachment (1) in the longitudinal direction (axial direction);
swinging the attachment (1);
a step of moving the plate-like member (2) in the longitudinal direction of the attachment (1);
a step of moving the spray nozzle (3) along the plate-shaped member (2);
a step of rotating (including swinging and/or rotating) the plate-like member (2) about the center of rotation extending in the longitudinal direction of the attachment (1);
It is preferable to include a step of rotating (including swinging and/or rotating) the spray nozzle (3) (including rotating the spray nozzle 3 with respect to the plate member 2).

In the spraying method of the present invention,
If the location where the spray material is to be sprayed is located below the highest point of the boom (31) provided on the vehicle (30: including machines traveling by track belts, such as backhoes), said attachment Without attaching (1), a spray nozzle (3) is attached to the tip of the boom (31) provided on the vehicle (30) on the opposite side of the vehicle (30), and the boom (31) is moved while moving. A spraying material is ejected from the spraying nozzle (3),
If the location where the spraying material is sprayed is higher than the highest point of the boom (31) provided on the vehicle (30: including machines traveling by track belt), the boom (31) provided on the vehicle (30). It is preferable to attach the attachment (1) to the end of the boom (31) opposite to the vehicle (30).

Further, in the spraying method of the present invention,
A spraying material supply system (20) for supplying the spraying material to the spraying nozzle side is provided with a spraying solidifying material pump (21: for example, a concrete pump), and the spraying solidifying material pump (21) is mounted on a movable carriage (22). is placed,
(In order to avoid the construction range being limited to the pumping distance as much as possible) When spraying the spraying material from the spraying nozzle (3), the carriage (22) is placed near the spraying nozzle (3). ).

The spraying machine (100) used in the spraying method of the present invention (the spraying method of claim 1) comprises:
Attachment (1) with attachment-side connection means (4) for attachment to and/or detachment from a boom (31) provided on a vehicle (30: including machines traveling by track belt) with
The attachment (1) is equipped with a spray nozzle (3) and is characterized by having a function of adjusting the spray distance (L) from the outlet of the spray nozzle (3) to the spray surface (F). .
Here, the spraying distance (L) is preferably adjusted to a spraying distance (the distance of the region β: for example, the distance β1) determined by a test using a specimen performed before construction.

In the spraying machine (100) of the present invention, the attachment (1)
It has a first member (1-1: vehicle side member) and a second member (1-2: spray nozzle side member) having the longest shape, and the second member (1-2) is the first It is configured to be extendable and contractible in the longitudinal direction by sliding on the member (1-1) of
A plate-like member (2) that is movable in the longitudinal direction of the second member (1-2: spraying nozzle side member) and extends in a direction perpendicular to the longitudinal direction (lateral direction); 2) a lateral movement member (5) for moving the spray nozzle (3) along;
a first rotating member (6) for rotating the plate-like member (2) about a rotation center extending in the longitudinal direction of the second member (1-2: spray nozzle side member);
A second rotating member (7) for rotating the spray nozzle (3) (including rotating the spray nozzle 3 with respect to the plate member 2),
It is preferable that the vehicle (30) is provided with a vehicle-side rocking member (8) for rocking the first member (1-1: vehicle-side member).

In the spraying machine (100) of the present invention,
If the location where the spray material is to be sprayed is located below the highest point of the boom (31) provided on the vehicle (30: including machines such as backhoes traveling by track belts), the boom (31 ) without attaching the attachment (1) to the tip of the boom (31) opposite to the vehicle (30). A boom-side connection member (32) to which the spray nozzle (3) can be attached/removed is preferably provided at the tip of the side.

Further, in the spraying machine (100) of the present invention,
A spraying material supply system (20) for supplying the spraying material to the spraying nozzle side,
The spraying material supply system (20) is interposed with a spraying solidifying material pump (21: for example, a concrete pump),
In order to shorten the distance between the spray nozzle (3) and the spray solidifying material pump (21) when spraying the spray material from the spray nozzle (3), the spray solidifying material pump (21) is moved. It is preferably mounted on a possible carriage (22).

In the present invention, the spray surface (F) preferably includes a slope surface and/or a tunnel inner wall surface.

For example, since a quick-setting agent is added to the sprayed material such as mortar, the shorter the distance to the sprayed surface (F), the faster the sprayed material reaches the sprayed surface (F) before the quick-setting agent acts. Therefore, the spray material collides with the spray surface (F) without becoming lumps (so-called "lumps"), which is convenient.
However, if the distance from the spray nozzle (spray nozzle) to the spray surface (F) is too short, in the case of mortar, the high-pressure air, mortar, and quick-setting agent will cause the spray material to flow. It is difficult to evenly cover the sprayed surface (F) with the sprayed material because the sprayed material is unevenly distributed in the interior and collides with the sprayed surface (F).
In order to spray the spraying material onto the spraying surface (F), it is necessary that the ejected spraying material reaches the spraying surface (F) in a liquid state.
Therefore, it is inconvenient if the spray distance (spray distance L) from the spray nozzle outlet to the spray surface (F) is too long or too short.
According to the above-described present invention, the position of the spray nozzle (3) and the spray direction of the spray material have a large degree of freedom, and the control can be performed with high accuracy. Since the spray distance (L) from the spray nozzle (3) ejection port to the spray surface (F) is adjusted, the spray distance (L) from the spray nozzle ejection port to the spray surface (F) can be adjusted accurately and easily. , and the distance between the nozzle (3) for spraying and the sprayed material can be properly maintained.
That is, the distance between the nozzle (3) for spraying and the spraying material is adjusted to an appropriate spraying distance (distance in the region β, for example, the distance β1) determined by a test using a specimen before construction, and held. can do

Since the spraying distance (L) from the ejection port of the spraying nozzle (3) to the spraying surface (F) can be accurately and easily adjusted to a proper spraying distance, according to the present invention, the spraying material can be used as a liquid. It is uniformly sprayed on the spraying surface (F) while maintaining properties.
Since the spraying material can be uniformly sprayed on the spraying (F) surface, the spraying work can be carried out with high quality. As a result of high-quality spraying, a high-strength, high-durability sprayer is realized without using expensive materials, even if the spraying material is composed of commonly priced materials.
Along with this, high-quality (high-strength, high-durability) sprayed mortar/concrete structures (sprayed seam work, mortar sprayed work, etc.) can be constructed even using general sprayed materials.

In addition, according to the present invention having the above-described structure, the spraying work can be performed by a machine without relying on human labor.
In addition, by attaching the attachment (1) to the boom (31) of an existing vehicle (30) having a boom (31), the spraying device (100) can be prepared without manufacturing a single item, which reduces construction costs. is saved.
By appropriately selecting the vehicle (30) to which the attachment (1) is to be attached and selecting the vehicle (30) corresponding to the construction height of the spraying work, the construction range is not limited.
Similarly, by selecting an appropriate operation, it is possible to omit the fixing operation by projecting outriggers of the vehicle.
Then, a large amount of spraying material can be sprayed onto the spraying surface (F) to be applied.

In addition, according to the present invention, the position of the spraying nozzle (3) and the spraying direction of the spraying material can be controlled with high degree of freedom. Therefore, the spray nozzle (3) can be moved to follow the surface shape of the spray surface (F) with high accuracy. Even if there is, the spray material ejected from the spray nozzle (3) can be accurately sprayed on the surface of the spray surface (F) with a uniform thickness. As a result, it is possible to accurately form a sprayed layer of uniform thickness on the surface of the spraying surface (F), and to properly maintain the distance between the ejection port of the spraying nozzle (3) and the sprayed material.

Here, in the present invention, since the first member (1-1) and the second member (1-2) of the attachment (1) slide and expand and contract, the piping for conveying the solidifying material It is necessary to use a highly flexible rubber hose (11) as the attachment (1), and to absorb the difference in longitudinal length between contraction and extension of the attachment (1) by slackness of the rubber hose (11). However, it is known that the highly flexible rubber hose (11) has higher piping resistance than rigid piping. By loosening the rubber hose (11), the difference in longitudinal length between contraction and extension of the attachment (1) is absorbed. It needs to be longer than the fixed piping. Therefore, the pipe resistance is high in the spray material supply system (20) composed of the rubber hose (11), and the possibility of clogging of the pipe is higher than in the conventional air pressure feed.
On the other hand, in the present invention, if the spraying material supply system (20) is interposed with the spraying solidifying material pump (21) and the spraying solidifying material pump (21) is placed on a movable carriage (22), , the distance from the discharge port of the pump (21) to the nozzle (3) by moving the carriage (22) (the length of the rubber hose 11 from the discharge port of the pump (21) to the nozzle (3) ) can be shortened to reduce piping resistance in the spraying material supply system (20). As a result, clogging of the rubber hose (11) can be suppressed. In addition, since the sprayed hardening material pump (21) is mounted on a movable carriage (22), it is possible to avoid, as far as possible, the limitation of the working range due to the pumping distance.

FIG. 4 is a diagram schematically showing the properties of a jet stream of a spraying material ejected from a spraying nozzle; FIG. 4 is a characteristic diagram showing the relationship between the spray distance of the spray material and the unconfined compressive strength. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the outline|summary of embodiment of this invention. FIG. 10 is an explanatory view showing a process of extending and contracting the attachment in the longitudinal direction in the embodiment; It is explanatory drawing which shows the process of rocking|swiveling an attachment. FIG. 5 is an explanatory view showing a process of moving the spray nozzle laterally along the plate-like member; FIG. 4 is an explanatory view showing an example of a mechanism for moving a spray nozzle laterally along a plate-like member; It is explanatory drawing which shows the process which rotates the said plate-shaped member. FIG. 4 is an explanatory diagram showing an example of a mechanism for rotating a plate-shaped member; FIG. 10 is an explanatory diagram showing an example different from that in FIG. 9 of a mechanism for rotating the plate member; It is explanatory drawing which shows the process which rotates a nozzle. It is explanatory drawing which shows an example of the mechanism which rock|fluctuates a nozzle. 13A and 13B are explanatory views showing rocking in the mechanism of FIG. 12; FIG. 14 is an explanatory diagram showing another example of a mechanism for swinging the nozzle, different from those shown in FIGS. 12 and 13. FIG. It is explanatory drawing which shows an example of the mechanism which rotates a nozzle tip. FIG. 4 is a functional block diagram of a controller having the function of controlling the sprayer in the illustrated embodiment; It is explanatory drawing which shows the structure of a spraying material supply system. It is an explanatory view showing the important section of the spraying material supply system in the embodiment. It is explanatory drawing which shows the modification in the spraying material supply system in embodiment. In an embodiment, it is an explanatory view showing a mode which sprays without using an attachment. It is a modification of the aspect shown in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As will be described later with reference to FIG. 17, in the illustrated embodiment, a tip air addition system is employed in which high-pressure air is added to the conveyed solidifying material such as mortar in the vicinity of the spray nozzle 3 .
In the tip air addition method, since the distance from the spray nozzle 3 to the spray surface F is the pressure feeding distance of the solidified material by air, the distance is very short, and the spray material can be sprayed from the spray nozzle 3 as a liquid spray material. be possible. Then, the amount of the quick-setting agent in the sprayed material is maintained as a liquid for the time until the sprayed material reaches the spraying surface F (until the spraying material reaches the spraying surface F, the liquid limit is not exceeded. setting), the spraying material can be uniformly sprayed onto the spraying surface F.

According to the experimental results of the inventors, the spray material jet stream jetted from the jet port 3N of the spray nozzle 3 toward the spray surface F has properties as schematically shown in FIG.
FIG. 1 is an analysis result showing the state of the sprayed material jet from the injection port 3N of the spraying nozzle 3 to the spraying surface F. As shown in FIG. As shown in FIG. 1, the spray material jet is composed of areas A1 to A5. Area A1 is "the area where the instability was theoretically analyzed" and area A2 is "the numerical simulation by the interface tracking method". area", and area A3 is "the area where the numerical simulation was performed by the particle tracking method". The area A4 is "the area where the spray characteristics and spray behavior are analyzed by optical observation", and the area A5 is "the area where the atomization mechanism is analyzed by instant photography and high-speed video observation".
In FIG. 1, a straight line AL indicates the limit of the range in which the distance between the ejection port 3N of the spray nozzle 3 and the spray surface F can be manually controlled. cannot be manually adjusted to be shorter than the distance between the ejection port 3N of the spray nozzle 3 and the straight line AL.

According to the inventor's experiments, the spraying distance L from the spraying material ejection port (the ejection port 3N of the spraying nozzle 3) to the spraying surface F and the uniaxial compressive strength σ of the spraying material covering the spraying surface F are: There is a characteristic CL as shown in FIG. In FIG. 2, symbol BE indicates spray energy characteristics.
In FIG. 2, the horizontal axis represents the spraying distance L from the injection port 3N of the spraying nozzle 3 to the spraying surface F, and the left vertical axis represents the uniaxial compressive strength σ of the spraying material covering the spraying surface F. distance-uniaxial compressive strength characteristics) and characteristics BE (spraying energy characteristics) are divided into regions α, β, and γ.
The region α is "a region where the spraying energy decreases and the unconfined compressive strength σ decreases". In other words, this is a region where the spraying energy is reduced because the spraying distance L from the ejection port 3N of the spraying nozzle 3 to the spraying surface F is too long. Here, the spraying energy is the force that compacts the mortar onto the spraying surface F, and depends on the air pressure. In the region α, since the spraying distance L is long, the mortar tends to clump together due to the action of the quick-setting agent.
The region β is “a region where the unconfined compressive strength σ increases due to grain refinement and W/C reduction”. The spraying distance L=β1, which is the boundary between the regions β and α, is the optimum distance for the characteristic (at the spraying distance L=β1, the characteristic CL indicates the maximum value of the uniaxial compressive strength σ). The optimum spraying distance L=β1 can be determined by a test using a test piece before spraying.
The region γ is "a region where the spraying distance L is too short and the mortar, air, and quick-setting agent in the jet of the spraying material are unevenly distributed and are not uniform". In the region γ, the quick-setting agent does not sufficiently contact the mortar and does not act as a quick-setting agent. Therefore, the uniaxial compressive strength remains low.
In FIG. 2 as well, the straight line AL indicates the limit at which the spraying distance L can be manually adjusted.

As described above, the spraying surface spraying method for spraying the spraying material onto the surface of the spraying surface F, which has many uneven surfaces, is an operation ( manual work) was common. However, if the spraying distance L is long, the spraying material clumps up and collides with the spraying surface F due to the action of the quick-setting agent. If the spraying distance L is too short, the high-pressure air, mortar, and quick-setting agent are unevenly distributed in the sprayed material jet and collide with the sprayed surface F, so that the sprayed surface F cannot be uniformly covered with the sprayed material. Have difficulty. Therefore, it is necessary to carry out the spraying work with the spraying distance L being appropriate.
With the spraying machine 100 described later with reference to FIGS. 3 to 19, the spraying distance L from the ejection port 3N of the nozzle 3 to the spraying surface F can be adjusted to and maintained at the optimum distance L=β1.

Here, the appropriate value of the spraying distance L from the nozzle outlet 3N to the spraying surface F (for example, L = β1) depends on the determination of the quick-setting agent (type, amount added), W/C of mortar and other compositions. , differ from case to case. Therefore, in the illustrated embodiment, a test using a specimen is performed before construction, and the test determines the quick-setting agent (type, amount added), determines the mortar (W / C and other compositions), A distance L between the injection port 3N of the nozzle 3 and the spray surface F is determined. During the spraying method, as will be described later with reference to FIG. 16, the nozzle position is controlled to properly maintain the distance L between the ejection port 3N of the nozzle 3 and the spraying surface F.

A spraying machine 100 capable of spraying the spraying material onto the spraying surface F by adjusting the spraying distance L from the nozzle outlet 3N to the spraying surface F will be described below with reference to FIGS. will explain.
In FIG. 3 , the spraying machine 100 has a vehicle 30 (including a track-traveled machine) and an attachment 1 attachable/detachable to a boom 31 of the vehicle 30 . The attachment 1 is connected to the boom 31 by the attachment side connecting means 4 .
As will be described later, the attachment 1 has a first member 1-1 (vehicle side member) and a second member 1-2 (spraying nozzle side member). The attachment 1 can be extended and contracted in the longitudinal direction by sliding the members 1-2. In other words, the second member 1-2 can move (slid) with respect to the first member 1-1.
The attachment 1 is provided with a plate-like member 2 extending in a direction (horizontal direction) orthogonal to the longitudinal direction, and a spray nozzle 3 movable along the plate-like member 2 . The spraying nozzle 3 is configured to move (perform a nozzle moving step) following the surface shape of the spraying surface F (construction slope surface) on which the spraying operation is to be performed. Reference numeral 11 denotes a rubber hose (supply hose) for supplying the spraying material (solidifying material) to the spraying nozzle 3 .
In addition, the said spray surface F may be a tunnel inner wall surface.

As will be described in detail below, the spray machine 100 of FIG.
a step of extending and contracting the attachment 1 in the longitudinal direction (axial direction) (see FIG. 4);
a step of swinging the attachment 1 (see FIG. 5);
a step of moving the plate member 2 in the longitudinal direction of the attachment 1 (see FIG. 4);
a step of moving the spray nozzle 3 along the plate member 2 (see FIG. 6);
a step of rotating (including swinging and/or rotating) the plate-like member 2 about the center of rotation extending in the longitudinal direction of the attachment 1 (see FIG. 9);
A step of rotating (including swinging and/or rotating) the spray nozzle 3 (in the attachment mechanism for attaching the spray nozzle to the plate member) (see FIG. 11)
is configured to be executable. A nozzle moving step of moving the spray nozzle 3 following the surface shape of the slope F is constituted by the above steps.
The vehicle 30 is provided with a control unit CU having a function of controlling the various processes described above.
In FIG. 3, a vehicle 30 and a truck 22 are connected via a connecting rod 33, and a concrete pump 21 is placed on the truck 22. As shown in FIG. As will be described later with reference to FIG. 18, the spraying material (solidifying material) discharged from the concrete pump 21 is shortened by the rubber hose 11 and pressure-fed to the spraying nozzle 3 (not shown). This is to reduce the risk of

FIG. 4 shows the process of extending and contracting the attachment 1 in the longitudinal direction.
In FIG. 4, the attachment 1 has a first member 1-1 (vehicle side member) and a second member 1-2 (spraying nozzle side member) having a shape extending in the longitudinal direction. By sliding (sliding) the member 1-2 to the first member 1-1, the attachment 1 (first member 1-1, second member 1-2) can be expanded and contracted in the longitudinal direction. .
The attachment 1 has an attachment-side connection means 4 near the vehicle-side end of the first member 1-1, and can be attached to and/or removed from a boom 31 of a vehicle 30 via the attachment-side connection means 4. is configured to
FIG. 4 shows the attachment 1 in the most extended state, with the lower end of the second member 1-2 positioned near the upper end of the first member 1-1. On the other hand, although not shown, when the attachment 1 is contracted to be the shortest, the upper end of the second member 1-2 is positioned near the upper end of the first member 1-1. In FIG. 4, an arrow S indicates the range of movement of the upper end of the second member 1-2.
As a mechanism for sliding the second member 1-2 of the attachment 1 with respect to the first member 1-1, for example, a known mechanism used in forklifts can be employed.

In FIG. 4, the second member 1-2 of the attachment 1 is movable in the longitudinal direction of the second member 1-2 and extends in a direction (lateral direction) perpendicular to the longitudinal direction (see FIG. 4). 6) is attached. In FIG. 4, the single plate-like member 2 moves to the top of the second member 1-2, moves to the bottom, and moves to an intermediate position between the top and bottom. It is shown. It is not the case that three plate-like members 2 are provided.
Including a state (not shown) in which the attachment 1 is contracted to its shortest length, the range in which the plate member 2 can move in the longitudinal direction of the attachment 1 is approximately twice the range of the three positions shown in FIG. range. A conventionally known mechanism can be used as a mechanism for moving the plate member 2 in the longitudinal direction of the second member 1-2.
A spray nozzle 3 is attached to the plate-like member 2 , and the spray nozzle 3 is movable along the plate-like member 2 in the horizontal direction (the direction perpendicular to the paper surface in FIG. 4 ). In FIG. 4, reference numeral 11 designates a supply hose for supplying the solidifying material (spraying material) to the spraying nozzle 3. As shown in FIG.

The process of rocking the attachment 1 is shown in FIG.
5, a boom 31 of a vehicle 30 is provided with a vehicle-side swinging member 8 for swinging (the first member 1-1 of) the attachment 1. As shown in FIG. In FIG. 5, the vehicle-side swing member 8 is set to swing the attachment 1 within a maximum range of 15 degrees, but "maximum 15 degrees" is an example, and other angles can be set.
A conventionally known mechanism can be used as the vehicle-side swinging member 8 for swinging the attachment 1 .

FIG. 6 shows the process of sliding (sliding: moving) the spray nozzle 3 along the plate member 2 .
In FIG. 6, the spray nozzle 3 slides (moves) along the plate member 2 in a direction perpendicular to the longitudinal direction of the attachment 1 (arrow A6 direction). FIG. 6 shows a state in which a single spray nozzle 3 is positioned at both ends and the center of the plate member 2 in the longitudinal direction (arrow A6 direction). It is not the case that three spray nozzles 3 are provided.
A supply hose 11 is connected to the spray nozzle 3 .
The spray nozzle 3 is moved along the plate-like member 2 by the laterally moving member 5 . The lateral movement member 5 will be described with reference to FIG.

In FIG. 7, the lateral movement member 5 arranged on the plate member 2 has a pair of sprockets 5A, 5A, a chain 5B driven by the sprocket 5A, and a nozzle mounting member 5C fixed to the chain 5B. there is The nozzle mounting member 5C is fixed to the chain 5B and is mounted to a square pipe (not shown) attached to the plate member 2 via a rotating roller (not shown). A spray nozzle 3 is attached to the nozzle attachment member 5C.
When the spray nozzle 3 is moved along the plate-like member 2, one of the pair of sprockets 5A is rotated forward or reverse by a drive source (for example, a hydraulic motor (not shown)), thereby causing the chain 5B to travel left and right. do. Then, the spray nozzle 3 moves in the horizontal direction (arrow A7) in FIG. 7 together with the nozzle mounting member 5C fixed to the chain 5B.
The spray nozzle 3 attached to the nozzle mounting member 5C is stopped and fixed at an arbitrary position by stopping the hydraulic motor (not shown) by the operation of the sprayer.
In FIG. 7, the spray nozzle 3 is arranged in a direction perpendicular to the longitudinal direction of the plate-like member 2 (the direction perpendicular to the paper surface in FIG. 7). As will be described later, the spray nozzle 3 can be rotated (including swinging and/or rotating).

FIG. 8 shows the rotation (arrow R1) of the plate-like member 2 about the rotation center axis C8. The rotation center axis C8 extends in the longitudinal direction of the second member 1-2 of the attachment 1. As shown in FIG. In order to avoid complication of illustration, illustration of the nozzle 3 is omitted in FIG.
The plate member 2 is rotated by first rotating members 6 and 6-1, which will be described later with reference to FIGS. 9 and 10. FIG.

The first rotating member 6 schematically shown in FIG. 9 includes a first and second cylinders 6A and 6B which are extendable. The movable pivot point 2a is connected, and the second cylinder 6B connects the cylinder mounting portion 6C and the rotatable pivot point 2b of the plate member 2. As shown in FIG.
When the expansion and contraction amounts of the first and second cylinders 6A and 6B are equal, the plate-like member 2 is at the rotation position P1 indicated by the solid line, and when the first cylinder 6A is extended and the second cylinder 6B is contracted, The plate-like member 2 rotates (arrow R2) to, for example, a rotation position P2 indicated by a dashed line. By adjusting the amount of expansion and contraction of the first cylinder 6A, the plate member 2 can be fixed at various positions.

In FIG. 10 showing a modified example 6-1 of the first turning member, the first turning member 6-1 attached to the second member 1-2 (not shown in FIG. 10) has a plate-like shape. The plate member 2 is rotatably supported by the member support portion 6-1A and the mounting portion 2c. The plate-like member supporting portion 6-1A is provided near the tip of the body portion of the first rotating member 6-1, and the mounting portion 2c is provided on the mounting bracket 2A on the plate-like member 2 side.
The first rotating member 6-1 is provided with a telescopic cylinder 6-1B. The cylinder 6-1B connects the cylinder mounting portion 6-1C and the cylinder mounting portion 2d of the main body of the first rotating member 6-1. The cylinder mounting portion 2d is provided on the mounting bracket 2A on the plate member 2 side.

As shown in FIG. 10, the cylinder mounting portion 2d of the plate-like member 2 is different from the mounting portion 2c provided on the mounting bracket 2A (the plate-like member supporting portion 6-1A of the main body) and the cylinder mounting portion 6-1C. is offset with respect to the direction of cylinder expansion and contraction. Therefore, when the cylinder 6-1B is expanded and contracted, the plate member 2 can be rotated (arrow R3).
For example, when the cylinder 6-1B is compressed as indicated by the solid line, the plate member 2 can be brought to the rotational position P3 indicated by the solid line in FIG. Alternatively, when the cylinder 6-1B is extended as indicated by the dotted line, the plate-like member 2 can be brought to the rotational position P4 indicated by the broken line in FIG. By adjusting the expansion/contraction amount of the cylinder 6-1B, the plate member 2 can be fixed at various rotational positions.

FIG. 11 shows the rotation (swing) of the spray nozzle 3 .
In FIG. 11, the spray nozzle 3 is movably provided on a plate member 2 (not shown) by a mounting mechanism 9, and rotates (including swinging and/or rotating) as indicated by an arrow R4. . In FIG. 11, reference numeral 11 denotes a supply hose for supplying the solidifying material to the spray nozzle 3. As shown in FIG.
The spray nozzle 3 is rotated by a second rotating member 7. The second rotating member 7 will be described with reference to FIGS. 12 to 15. FIG.

A second rotating member 7 shown in FIG. 12 is an example of a mechanism for rotating the spray nozzle 3 .
In FIG. 12, the second rotating member 7 has a disk portion 7C rotated by a rotating shaft 7B provided in a body portion 7A, and one end portion 7DA of a rod 7D is rotatably supported on the disk portion 7C. ing. The other end portion 7DB of the rod 7D is connected to the connection member 3D through the connection member 7E in the vicinity of the base portion of the spray nozzle 3. As shown in FIG. The connection member 3D connects the spray nozzle 3 and the supply hose 11 .
Although not clearly shown, the other end portion 7DB of the rod 7D is pivotally supported so as to be movable in the vertical direction in FIG. It is When the other end portion 7DB is pivotally supported in such a manner, when the disk portion 7C of the second rotating member 7 is rotated (arrow R5 in FIG. 13), the rotation of the disk portion 7C causes the rod 7D and the connecting member to rotate. 7E, it is transmitted to the spray nozzle 3 via the connection member 3D, and the spray nozzle 3 swings, for example, as indicated by an arrow R6 in FIG. The swing angle is, for example, 45° on one side.
The position of one end portion 7DA of the rod 7D on the disk portion 7C (the positional relationship with the center of rotation 7C1) and the like are adjusted, and the other end portion 7DB of the rod 7D is rotatably fixed to the connecting member 7E (axis By doing so, the tip of the spray nozzle 3 can be rotated as indicated by an arrow R7 in FIG.

The mechanism for rotating the spray nozzle 3 is not limited to the mechanism shown in FIGS. 12 and 13, and may be the mechanism shown in FIG. 14, for example. FIG. 14 shows a modified example 7-1 of the second rotating member, which is a mechanism for rotating the spray nozzle 3. As shown in FIG.
In FIG. 14, the second rotating member 7-1 comprises a telescopic first cylinder 7-1A and a second cylinder 7-1B. The second cylinder 7-1B is connected to the second cylinder mounting portion 7-1D and the bracket 3A on the spray nozzle 3 side. It connects with the mounting portion 3b.

Depending on the amount of expansion and contraction of the first and second cylinders 7-1A and 7-1B, the spray nozzle 3 rotates (swings) about the rotation center 3B (arrow R8), and reaches a predetermined swing angle. is held to When the expansion and contraction amounts of the first and second cylinders 7-1A and 7-1B are made equal, the spray nozzle 3 is held at the solid line position (position P5) in FIG.
When the first cylinder 7-1A is contracted and the second cylinder 7-1B is extended, the spray nozzle 3 is moved to the left (in FIG. 14) with respect to the swing center 3A, and is in the swing position indicated by the dashed line. (Position P6). On the other hand, when the first cylinder 7-1A is extended and the second cylinder 7-1B is contracted, the spray nozzle 3 moves to the right (in FIG. 14) with respect to the swing center 3A, and the swing shown by the dashed line. It becomes the moving position (position P7). By adjusting the expansion/contraction amounts of the first cylinder 7-1A and the second cylinder 7-1B, the spray nozzle 3 can be set to various swing positions.
In FIG. 14, the swing angle of the spray nozzle 3 is, for example, 15° on one side.

Rotation of the spray nozzle 3 includes, in addition to swinging as shown in FIGS. 12 to 14, the tip of the spray nozzle 3 rotating so as to draw a small circular trajectory. FIG. 15 shows a second modified example 7-2 of the second rotating member that rotates the tip of the spray nozzle 3 so as to trace a small circle locus.
In FIG. 15, the second rotating member 7-2 has a first disk portion 7-2C rotatably supported on a rotating shaft 7-2B provided in a main body portion 7-2A. A second disk portion 7-2D is rotatably supported on the portion 7-2C by a shaft portion 7-2DA. The center of rotation 7-2CA of the first disc portion 7-2C is offset with respect to the center of the first disc portion 7-2C (the center point of the circle).
The end portion 7-2DB (upper end in FIG. 15) of the second disk portion 7-2D is connected to the connection member 7-2E, and the support member 3E of the spray nozzle 3 is fixed to the connection member 7-2E. ing.

In FIG. 15, when the first disk portion 7-2C rotates about the rotation shaft 7-2CA (arrow R9), the second disk portion 7-2D rotates eccentrically, and the eccentric rotation 7-2E, the force is transmitted to the spray nozzle 3 via the support member 3E, and the tip of the spray nozzle 3 rotates so as to trace a small circular trajectory (arrow R12).
By adjusting the offset amount of the rotation center 7-2CA of the first disk portion 7-2C, the pivot position 7-2DA of the second disk portion 7-2D, etc., the rotation R12 of the tip of the spray nozzle 3 can be adjusted. You can adjust the radius of rotation.
It should be noted that FIG. 15 is shown upside down with respect to the actual machine in order to simplify the illustration and the explanation.

Next, the control unit CU of the spraying machine 100 will be described with reference to FIG. 16, which is a functional block diagram.
As described above, the control unit CU of the spraying machine 100 is provided on the vehicle 30 . Control unit CU can also be provided at a position separated from vehicle 30 .
The control unit CU has a function of adjusting the distance (spraying distance L) between the injection port 3N (FIG. 2) of the spraying nozzle 3 and the spraying surface F. The control unit CU controls the expansion and contraction of the attachment 1 in the longitudinal direction, the movement of the plate-like member 2 to the target position in the longitudinal direction of the second member 1-2, and the movement of the spray nozzle 3 in the longitudinal direction of the plate-like member 2. It has a function of executing movement, rotation of the plate member 2, rotation of the spray nozzle 3, and swinging of the first member 1-1. It has the function of transmitting a signal.

16, the control unit CU of the spraying machine 100 includes a spraying area specifying block B1, a nozzle position adjusting block B2, a spraying amount check block B3, a spraying amount determination block B4, an air increase/decrease determination block B5, and a control signal generation block B6. have.
An input device CU1 is provided outside the control device CU for inputting (from the outside of the control device CU to the control device CU) data relating to an appropriate spraying distance, etc., obtained from experiments previously performed. The data to be input from the input device CU1 to the control device CU includes the data of the quick-setting agent (type, amount added), the data of the solidifying agent such as mortar (W/C and other composition), the injection port of the spray nozzle 3 The data of the optimum spraying distance (L=β1) between 3N and the spraying surface F, the execution specification data (including position data) of the sprayer for each area of the slope (spraying surface F) where the spraying material is to be sprayed, etc. be. The input device CU1 (not shown in FIG. 3) can be configured by an information processing device such as a PC.

The spraying area specifying block B1 has a function of acquiring data on the slope F (spraying surface) to which the spraying material is to be sprayed or the position of each region (area) thereof from the input device CU1 via the signal line SL1.
The spraying area specifying block B1 has a function of specifying the spraying position based on the acquired position data. A conventionally known technique can be adopted for specifying the spraying position.
It is also possible to separately provide a measuring device for creating image data, etc., of the slope surface to be sprayed so that the spraying area specifying block B1 acquires position data from the measuring device.
Information on the spraying position specified by the spraying area specifying block B1 is transmitted to the nozzle position adjusting block B2 via the signal line SL2.

Before carrying out the spraying method, a test using a test piece is performed to determine the quick-setting agent (type, amount added), the mortar (W/C and other composition), and the spray nozzle 3 (the injection port 3N) and the spraying surface F (optimum spraying distance L=β1) is determined.
The spraying distance L (optimal spraying distance L=β1) obtained from the test results performed before construction is transmitted from the input device CU1 to the nozzle position adjustment block B2 via the signal transmission line SL13.
Although not clearly illustrated, the data of the quick-setting agent (type, amount added) determined by the test before construction, the data of mortar (W / C and other compositions), the slope to which the spray material should be sprayed Execution specification data of the sprayer for each area is also transmitted from the input device CU1 to the spray amount check block B3, the spray amount determination block B4, the air increase/decrease determination block B5, and the like.
During application, the nozzle position is controlled to properly maintain the distance L between the ejection port 3N of the nozzle 3 and the spray surface F. In other words, the distance L between the ejection port 3N of the nozzle 3 and the spray surface F is maintained at an optimum distance (L=β1).

The nozzle position adjustment block B2 is based on the information on the spraying position specified by the spraying area specifying block B1 and the spraying distance L (the optimum distance β1 between the spraying nozzle 3 and the spraying surface F) obtained from the input device CU1. It has a function of adjusting (controlling) the spraying distance L from the ejection port 3N of the spraying nozzle 3 to the spraying surface F to the optimum spraying distance L=β1 previously determined by the test.
Then, it has a function of adjusting (controlling) the optimum nozzle position for executing the adjustment. Specifically, in order to adjust the optimum nozzle position, the operation and position of each member such as the attachment 1 (members shown in FIGS. 3 to 15) are determined, and the signal line SL3 is connected to each member such as the attachment 1. It has the ability to send control signals via
In the control by the nozzle position adjustment block B2 (and/or the spray amount check block B3), the spray position information acquired from the spray area specifying block B1 is, for example, whether the spray thickness at the spray position has reached a predetermined thickness. It is used to confirm whether or not (spraying situation at the spraying position), and to confirm whether further spraying to the spraying position is necessary.

The nozzle position adjustment block B2 has a function of transmitting a signal regarding the nozzle position to the control signal generation block B6 via the signal line SL4 in order to carry out spraying in the spraying area.
In FIG. 16, the spraying quantity check block B3 has a function of acquiring execution specification data of the sprayer for each area of the slope to which the spraying material is to be sprayed from the input device CU1 via the signal line SL5. ing.
Further, the spray amount check block B3 has a function of checking whether or not it is necessary to further spray the relevant spray area based on the acquired spraying work specification data.
For example, a marker (a black marker made of plastic) installed according to a predetermined (target) spray thickness on the slope F to which the spraying method is to be applied is determined by video data obtained from a measuring device (not shown). If it cannot be visually recognized, it is determined that the spray thickness is the predetermined thickness, and no further spraying is necessary. Alternatively, when checking whether further spraying is necessary, it is possible to make a determination using a conventional technique based on video data obtained from a measuring device (not shown).
The result of the check by the spray amount check block B3 (determination result as to whether or not further spraying is necessary) is sent to the spray amount determination block B4 via the signal line SL6.

The spray amount determination block B4 acquires information on whether or not it is necessary to further spray the sprayed position from the spray amount check block B3, and also determines the area of the slope to which the spray material is to be sprayed. It has the function of acquiring data (construction specification data, etc.) and determining the spraying amount.
When determining the amount of spraying, for example, an image immediately before spraying and an image immediately after spraying taken by a measuring device (not shown) can be compared and calculated by a conventional method. Furthermore, it is also possible to determine the amount of spraying by visually recognizing the mark using the image data. As a result of determining the spraying amount, it is determined whether to maintain, increase or decrease the spraying amount, or to set the spraying amount to zero (spraying is stopped) (determining the spraying amount). Information on the spray amount determined by the spray amount determination block B4 (determination of the spray amount) is transmitted to the control signal generation block B6 via the signal line SL7.

In FIG. 16, the air increase/decrease determination block B5 acquires the execution specification data of the sprayer at the spraying position (region: area) from the input device CU1 via the signal line SL8, and based on the data, air is added to the spraying material. It has a function to determine whether or not it is necessary to mix quick-setting agent, and a function to increase or decrease the amount of air and quick-setting agent mixed when it is necessary to mix air and quick-setting agent, and to determine the amount of mixture. are doing.
When determining whether or not it is necessary to mix air and a quick-setting agent in the spray material, and/or when increasing or decreasing the amount of mixture when it is necessary to mix air and a quick-setting agent, and when deciding the amount of mixture For example, the state of adhesion of the spray material at the spraying position is confirmed visually or by image data (for example, a 3D map) from measuring devices (not shown), and necessary decisions are made based on the state of adhesion.
The results of determination by the air increase/decrease determination block B5 (determination result of whether or not to mix air and quick-setting agent, increase/decrease of mixing amount and determination result of mixing amount when it is necessary to mix air and quick-setting agent) are as follows. It is sent to the control signal generation block B6 via the signal line SL9.

As described above, the control signal generation block B6 receives from the nozzle position adjustment block B2 information signals (for example, signals relating to nozzle positions and movement speeds) relating to nozzles for carrying out spraying of the spraying area. At that time, control is performed to move the position of the spray nozzle 3 to an appropriate position so that the spray distance L from the ejection port 3N of the spray nozzle 3 to the spray surface F is a proper spray distance L=β1. Send a signal. Control signals to various members shown in FIGS. 3 to 15 are transmitted from the nozzle position adjustment block B2 via the signal line SL3. Such control signals are sent to various members shown in FIGS. 1 to 13, and the position of the spray nozzle 3 is adjusted by the operation of the various members, and the spray distance is obtained from the results of experiments conducted before construction. Make sure that the proper spraying distance is reached.

The control signal generation block B6 receives information on the spraying amount determined from the spraying amount determination block B4 (including information on stopping spraying), and further receives the determination result (mixing air and quick-setting agent) from the air increase/decrease determination block B5. It receives the determination result of whether or not to mix, the increase/decrease of the mixing amount when it is necessary to mix the air and the quick-setting agent, and the determination result of the mixing amount.
When the control signal generation block B6 receives a nozzle-related signal from the nozzle position adjustment block B2 (for example, a signal related to the nozzle position and movement speed for executing the spraying of the spray area), the control signal generation block B6 determines the spray amount from the spray amount determination block B4. It also has a function of transmitting a control signal to the concrete pump 21 of the spraying material supply system 20 via the signal line SL10 based on the determination result of the amount. Upon receiving the control signal, the concrete pump 21 supplies a predetermined amount (the amount determined in the spray amount determination block B4) of the spraying material (solidifying material) to the spraying nozzle 3 through the solidifying material pipe 11 (rubber hose). .
Further, when the control signal generation block B6 receives "a signal regarding the nozzle position and movement speed for executing the spraying of the spraying area" from the nozzle position adjusting block B2, it transmits a control signal to the concrete pump 21, It has a function of transmitting a control signal to the supply device 24 via the signal line SL11 and transmitting a control signal for operating the quick-setting agent supply device 25 via the signal line SL12.
Although not clearly illustrated, the air supply device 24 is composed of, for example, a compressor.

In FIG. 16, based on the control signal from the control signal generation block B6, the air supply device 24 supplies a predetermined amount of air determined by the air increase/decrease determination block B5 through the air pipe 13 (rubber hose: see FIG. 17). , and the quick-setting agent supply device 25 supplies a predetermined amount of quick-setting agent determined by the air increase/decrease determination block B5 through the quick-setting agent pipe 14 (rubber hose: see FIG. 17).
The air supplied from the air supply device 24 and the quick-setting agent supplied from the quick-setting agent supply device 25 are, as will be described later with reference to FIG. upstream), it is mixed into the spray via the quick-setting ring 12 .

As shown in FIG. 16, each member (members shown in FIGS. 3 to 15) such as the attachment 1 is controlled by (the nozzle position adjustment block B2 of) the control unit CU, so that the spray nozzle 3 is positioned on the surface of the spray surface F. The position of the spraying nozzle 3 and the spraying direction of the spraying material are increased, and the control is performed with high accuracy.
Therefore, the spraying nozzle 3 can be moved to follow the surface shape of the spraying surface F with high accuracy, and even if the spraying surface (F) has many irregularities (unevennesses) and a complicated shape, The spraying material ejected from the spraying nozzle 3 can be accurately sprayed onto the surface of the spraying surface F with a uniform thickness. Then, the spraying distance L from the ejection port 3N of the spraying nozzle 3 to the spraying surface F can be adjusted and maintained at an appropriate spraying distance L=β1.

Next, mainly with reference to FIGS. 17 to 19, a spraying material supply system 20 that can be suitably used in the spraying machine 100 will be described.
In the spraying machine 100, the solidifying material (concrete, etc.) that is pressure-fed from the concrete pump 21 by the supply hose 11 and ejected from the spraying nozzle 3 has a slump value in order to prevent clogging of the spraying material supply system due to hardening. It is large and does not adhere to the slope as it is.
Therefore, a quick-setting agent ring 12 is provided in the spraying material supply system 20 just before the spray nozzle 3 ejects, and the quick-setting agent ring 12 mixes the air, the quick-setting agent, and the solidifying agent and ejects them. By mixing the quick-setting agent, the material sprayed from the spray nozzle 3 is solidified on the slope even if the slump value of the solidifying material is large.

In FIG. 17, the spraying material supply system 20 includes a solidifying material pipe 11 (rubber hose) that supplies the solidifying material from the concrete pump 21 to the spraying nozzle 3, The quick-setting agent ring 12 arranged to connect (merge), the air pipe 13 (for example, a rubber hose) for supplying air from the air supply device 24 to the upstream side of the quick-setting agent ring 12, and the quick-setting agent supply device 25 A quick-setting agent pipe 14 (for example, a rubber hose) is provided upstream of the quick-setting agent ring 12 to supply the quick-setting agent.
The quick-setting agent ring 12 has a confluence portion 12A that merges with the solidifying material pipe 11, a connection portion 12B with the air pipe 13, and a confluence portion 12C with the quick-setting agent pipe .
During construction, when mixing air, quick-setting agent, and mortar, first, the air flowing through the air pipe 13 and the quick-setting agent flowing through the quick-setting agent pipe 14 are mixed at the junction 12C to form a gas-liquid mixture. . The gas-liquid mixture is mixed with a solidifying agent (for example, mortar) flowing through the solidifying agent pipe 11 at the confluence portion 12A of the quick-setting agent ring 12 .

In the spraying machine 100 in the illustrated embodiment, as shown in FIG. 4, the attachment 1 (first member 1-1, second member 1-2) contracts. A highly flexible rubber hose 11 (hardening material pipe) is used to absorb the difference in longitudinal dimension when the attachment is extended and contracted, and the rubber hose 11 is loosened when the attachment is contracted. However, if the total length of the rubber hose 11, which has a large piping resistance, is lengthened in response to extension of the attachment, the possibility of clogging inside the rubber hose 11 increases.
Therefore, in the spraying machine 100, as shown in FIG. 18, a concrete pump 21 (a spray solidifying material) is used to pressure-feed the spraying material (solidifying material) manufactured by the mixer truck 23 to the spraying nozzle 3 (not shown) through the rubber hose 11. material pump) is placed on the carriage 22 . By moving the truck 22 to the vicinity of the construction site of the spraying method and moving the truck 22 to a position close to the spraying nozzle 3, the distance from the concrete pump 21 to the spraying nozzle 3 (full length of the rubber hose 11) can be shortened. Therefore, the piping resistance in the spray material supply system 20 can be reduced, and the risk of clogging in the rubber hose 11 can be reduced. In this case, the vehicle 30 and the truck 22 can be connected via a connecting rod 33, for example, as shown in FIG.
In the spraying material supply system 20 in the spraying machine 100 in the illustrated embodiment, the concrete pump 21 can not be placed on the truck 22 as shown in FIG. In that case, a plant for the solidification material (including the concrete mixer truck 23 and the concrete pump 21) will be provided near the construction site of the spraying method.

In the spraying machine 100 described with reference to FIGS. , When the attachment 1 is attached, the spray nozzle 3 is positioned higher than the spraying place, making spraying difficult.
If the location where the spray material is to be sprayed is lower than the highest point of the boom 31, as shown in FIG. The spray nozzle 3 is attached to the tip on the opposite side (tip on the highest point side) via a boom side connection member 32 that can be attached/removed, and the spray nozzle 3 is attached while moving the boom 31 Spray material from
If the location to be sprayed with the spray material is higher than the highest point of the boom 31, attach the attachment 1 to the boom 31 and carry out the spraying operation as described with reference to FIGS. 3 to 19. .

In the embodiment shown in FIG. 20, the nozzle 3 is fixed to the boom side connecting member 32, but as shown in FIG. It can be configured to be movable in the longitudinal direction (right and left direction in FIG. 21: arrow A6 direction).
In order to make the nozzle 3 movable in the longitudinal direction of the plate member 2, for example, a configuration for executing the steps described with reference to FIG. 6 may be used.
In the embodiment shown in FIG. 21 (modification of the embodiment shown in FIG. 20), when the location where the spray material is sprayed is located at a position lower than the highest point of the boom 31, not only the area near the boom side connecting member 32, The spray material can also be ejected to a location separated from the boom-side connecting member 32 in the longitudinal direction of the plate-like member 2 (horizontal direction in FIG. 21: arrow A6 direction).

It should be noted that the illustrated embodiment is merely an example and is not intended to limit the technical scope of the present invention.

1 Attachment 1-1 First member (vehicle side member)
1-2 ... second member (spraying nozzle side member)
2 Plate-like member 3 Blowing nozzle 4 Attachment-side connecting means 5 Lateral movement member 6 First rotating member 7 Second rotating member Member 8: Vehicle-side swinging member 11: Rubber hose (pipe for solidifying material)
20... Spray material supply system 21... Concrete pump (pump for spray hardening material)
22 Carriage 30 Vehicle 31 Boom 32 Boom-side connecting member 100 Spraying machine CU Control device CU1 Input device F Spraying surface (law surface)

Claims (7)

Having a step of attaching the attachment to the vehicle,
The attachment comprises a spray nozzle (3),
Having a nozzle position adjustment step of adjusting the position of the spray nozzle,
A spraying method, wherein the nozzle position adjusting step includes a step of adjusting a spraying distance (L) from a spraying nozzle outlet to a spraying surface. 2. The spraying method according to claim 1, wherein the spraying distance is adjusted to a spraying distance determined by a test using a specimen before construction. Prior to each step of claim 1, the step of determining the quick setting agent, the mortar, and the distance between the spray nozzle and the spray surface by testing using a test piece. Kano spraying method. The attachment includes a plate-shaped member movable in its longitudinal direction and extending in a direction orthogonal to the longitudinal direction, and a spray nozzle movable along the plate-shaped member,
The nozzle position adjustment step includes:
a nozzle moving step of moving the spraying nozzle following the surface shape of the spraying surface;
In the nozzle moving process,
a step of longitudinally expanding and contracting the attachment;
swinging the attachment;
a step of moving the plate member in the longitudinal direction of the attachment;
a step of moving the spray nozzle along the plate-like member;
a step of rotating the plate member about a center of rotation extending in the longitudinal direction of the attachment;
The spraying method according to any one of claims 1 to 3, comprising a step of rotating the spraying nozzle. In the spraying machine used in the spraying method of claim 1,
An attachment having attachment-side connecting means for attaching to and/or removing from a boom provided on a vehicle,
A spraying machine, characterized in that said attachment (1) comprises a spraying nozzle and has the function of adjusting the spraying distance from said spraying nozzle outlet to the spraying surface. 6. A spraying machine according to claim 5, wherein said spraying distance is adjusted to a spraying distance determined by a test using a specimen prior to construction. The attachment is
It has a first member and a second member having the longest shape, and is configured to be stretchable in the longitudinal direction by sliding the second member on the first member,
A plate-shaped member that is movable in the longitudinal direction of the second member and extends in a direction perpendicular to the longitudinal direction (horizontal direction), and a laterally-moving member that moves the spray nozzle along the plate-shaped member. ,
a first rotating member for rotating the plate member about a center of rotation extending in the longitudinal direction of the second member;
including a second rotating member for rotating the spray nozzle;
7. The spraying machine according to claim 5, wherein the vehicle is provided with a vehicle-side swinging member for swinging the first member.

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