JPH042757B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automated device for spraying the inside surface of a structure having a cylindrical cross section, and particularly relates to an automatic lining device for tunnel construction such as a headrace. be.

[Conventional technology]

The cross section of tunnels such as headrace channels is shown in Section 3 below.
As shown in the figure and FIG. 4, it is circular, and only the lower part is constructed horizontally with bottom concrete 2. In such a tunnel, the sides of the tunnel
In some cases, the ground is lined with the bare surface excavated by a boring machine, and depending on the condition of the ground, some areas are reinforced by wrapping it with concrete. Therefore, while the cross-sectional shape remains circular, the inner diameter changes along the longitudinal direction of the tunnel.

By the way, when applying lining to tunnel surfaces spanning several kilometers, conventionally it was done exclusively by manual methods such as roller coating and spraying.

[Problem that the invention seeks to solve]

However, especially when lining a tunnel surface with a narrow inner diameter, the work continues to be difficult for workers. Furthermore, in the case of spraying, the mist is filled and the work takes a long time in a bad environment. Furthermore, these works are inefficient and require a huge amount of labor and construction time. The present invention solves this problem by automatically following changes in the inner diameter of the tunnel, freeing workers from arduous work and long hours of work in adverse environments, and saving labor.
The purpose of this invention is to provide an automatic lining device that improves construction speed.

[Means for solving problems]

To this end, the automatic lining device of the present invention uses a trolley equipped with a plurality of nozzles for bottom, left, right, and ceiling applications to line the bottom surface of a structure with a cylindrical cross section. This is an automatic lining device that performs internal spraying work by running wheels on the top, and the multiple nozzles for left side work, right side work, and ceiling work follow changes in the inner diameter of the structure. The nozzle is fixed to the trolley side via an inner diameter moving means that moves in the inner diameter direction.
The present invention is characterized in that the plurality of nozzles attached to the bracket and used for bottom surface construction are fixedly attached to the trolley.

[Effect]

In the automatic lining device of the present invention, when the trolley is run on the bottom surface of a structure having a cylindrical cross section, the inner diameter moving means works even if the inner diameter of the structure changes, so that it can be used for left side construction, right side construction, etc. and each nozzle with multiple nozzles installed for ceiling surface construction.
The bracket moves in the inner diameter direction following changes in the inner diameter. Therefore, the tips of the plurality of nozzles for left side construction, right side construction, and ceiling surface construction are always kept at a constant distance and at a constant angle from the construction surface. Moreover, since the plurality of nozzles for bottom surface construction are fixedly attached to the trolley, their tips are always kept at a constant distance and at a constant angle from the construction surface.

〔Example〕

Examples will be described below with reference to the drawings.

Fig. 1 is a diagram showing one embodiment of the automatic lining device of the present invention, Fig. 2 is a plan view of the automatic lining device shown in Fig. 1, and Fig. 3 is a view of the automatic lining device shown in Fig. 1 as seen from arrow A. 4 is a front view of the automatic lining device shown in FIG. 1 as seen from arrow B, and FIG. 5 is a diagram illustrating the lining work of a tunnel surface using the automatic lining device of the present invention. In the figure, 1 and 21 are construction surfaces, 2 is concrete bottom, 3 is a trolley, 4 is a wheel, 5 is a material tank, 6 is a pump, 7 is a nozzle support frame, 8 and 1
8 is the nozzle bracket, 9 and 13 are the nozzles, 1
0 is a guide roller, 11 is an elastic body such as a helical spring, 12 is the guide roller, 14 is a battery storage section, 15 is an air hose winding drum,
16 is a drum drive electric motor, 17 is an air hose,
19 is a rear guide roller, 20 is a guide roller support frame, 22 is an automatic lining device, 2
3 indicates a worker, and 24 indicates an air transport pipe.

In FIG. 1, the trolley 3 runs on the bottom concrete 2 with wheels 4,
At the rear of the trolley 3, there is a nozzle for ceiling surface construction.
A nozzle support frame 7 is installed in which the bracket 18 and the nozzle bracket 8 for side construction are perpendicular to each other. As shown in FIG. 3, a plurality of nozzles 9 are attached to the nozzle brackets 8 and 18 for ceiling surface work and side surface work, respectively, and a plurality of nozzles 9 are fixed to the trolley 3 for bottom surface work. Nozzles 13 are attached.

As is clear from the illustrations in FIGS. 2 and 3, a part of the nozzle brackets 8 and 18 is a guide roller 10, and the guide roller 10 is connected to the nozzle support frame 7 via an elastic body 11. is combined with Therefore, when lining the tunnel surface while moving the trolley 3 forward on the bottom concrete 2 (moving to the right in FIG. 1), if the inner diameter of the tunnel changes, the elastic body 11 deforms and guides The roller 10 moves in the direction of the inner diameter of the tunnel cross section following the variation in the inner diameter, and the nozzle brackets 8 and 18 also follow. As a result, the tips of the plurality of nozzles 9 provided on the nozzle brackets 8 and 18 automatically maintain a constant distance and a constant angle from the tunnel construction surface 1.

In addition, bottom concrete 2 (bottom of the tunnel)
, the nozzle 13 is fixedly attached to the trolley 3, and since the trolley 3 always travels on the bottom concrete 2 with wheels 4, the distance between the tip of the nozzle 13 and the surface of the bottom concrete 2 is necessarily is kept constant.

In addition, since the nozzle bracket 18 for the ceiling surface and the nozzle bracket 8 for the side surface are on different planes, as is clear from the illustration in FIG. However, there will be no conflict.

Furthermore, the automatic lining device of the present invention is equipped with a battery storage section 14 having a capacity necessary for running the trolley 3, and controls the running of the trolley 3 by issuing and stopping commands. It includes a supply section, a traveling position control section, etc. The material supply section includes a material tank 5 that stores the sprayed material and a pump 6 that discharges the material, and the air supply section includes an air hose 17 that sequentially takes out compressed air from an air transport pipe provided in the tunnel. It consists of a winding drum 15 and an electric motor 16 that drives the winding drum 15. Note that the air is for operating the pump 6. In addition, the traveling position control section is
As shown in FIGS. 2 and 4, the front guide roller 12, the rear guide roller 19, and the elastic body 1
1, and since it is necessary to always center the trolley 3 while traveling, a front guide and a
The position of the truck 3 from the side wall is controlled by the roller 12, the rear guide roller 19, and the elastic body 11.

As means for moving the tip of the nozzle 9 in response to changes in the inner diameter, means other than those shown in the drawings are of course possible. For example, it is conceivable to use a sensor capable of detecting displacement, such as a potentiometer, to determine the amount of change in the inner diameter, and provide feedback to the hydraulic actuation mechanism of nozzle brackets 8 and 18 to obtain a predetermined spray distance. . However, considering the situation at tunnel construction sites, moving the tip of the nozzle 9 requires reliable control using a simple and solid mechanism, and with a complex system, there are problems in terms of response time and reliability. Furthermore, there are many problems from an economic perspective. In this respect, the means shown in FIGS. 1 to 4 do not involve signal processing and are constituted by a mechanical mechanism, so that a reliable follow-up operation can be realized.

In addition, during spraying work, it is necessary to select the nozzle tip and pump according to the characteristics of the material to be sprayed, and it is also necessary to appropriately determine the distance between the nozzle tip and the painted surface and the nozzle movement speed. It goes without saying that there is. In the automatic lining apparatus of the present invention, of course, the values of the above parameters are determined in advance, and the position of the nozzle bracket and the running speed of the truck are set based on the values. In addition, the sprayed material is stored in the tank for a certain number of construction lots, and when adding new material, each guide roller is shortened and the traveling speed is increased so that the material can be refilled at the designated material collection point. You can also do this.

An example of tunnel surface lining work using the automatic lining device of the present invention will be explained with reference to FIG. FIG. 5 shows an example in which the automatic lining device runs from the left side of the figure to the right side of the figure to carry out lining work. The automatic lining device 22 shown in FIG. 5 is equipped with a control panel having control functions such as transmitting and stopping the receiver and the trolley, and turning on/off the spray nozzle.The automatic lining device 22 shown in FIG. It sends wireless signals (radio waves, ultrasonic waves, etc.) to the automatic lining device 22 to control running. Therefore, the worker 23
The transmitter can be operated at a location away from the automatic lining device 22, that is, at a location away from the lining work place in a bad environment filled with mist.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, all the spraying work can be performed automatically, thereby freeing the worker from the long-time work of routing the nozzle in a bad environment filled with mist. The construction speed of lining can be dramatically increased (several to 10 times) compared to manual work.
The amount of labor required is only a machine operator, an air hose, and a material setup changer, which can significantly save labor.It flexibly follows changes in the excavated plain surface or concrete-wrapped surface, and ensures reliable spraying. Since the positions of the nozzle and bracket for the ceiling and side surfaces are shifted, the nozzle can follow the nozzle without any problem even if there is a sudden protrusion on both sides at the same time.The effect is extremely remarkable. .

[Brief explanation of drawings]

Fig. 1 is a diagram showing one embodiment of the automatic lining device of the present invention, Fig. 2 is a plan view of the automatic lining device shown in Fig. 1, and Fig. 3 is a view of the automatic lining device shown in Fig. 1 as seen from arrow A. 4 is a front view of the automatic lining device shown in FIG. 1 as seen from arrow B, and FIG. 5 is a diagram illustrating the lining work of a tunnel surface using the automatic lining device of the present invention. 1 and 21...Construction surface, 2...Bottom concrete, 3
...Dolly, 4...Wheels, 5...Material tank, 6...Pump, 7...Nozzle support frame, 8 and 18...Nozzle bracket, 9 and 13...Nozzle, 10...Guide roller, 11...Elastic material, 12...Front part guide roller, 14...battery storage part, 15...air hose winding drum, 16...drum drive motor, 17
...air hose, 19...rear guide roller,
20... Guide roller support frame, 22... Automatic lining device, 23... Operator, 24... Air transport pipe.

Claims (1)

[Claims] 1. For bottom surface construction, for left side construction, for right side construction,
An automatic lining device for carrying out internal spraying work by running a trolley equipped with a plurality of nozzles each on wheels over the bottom surface of a structure having a cylindrical cross section for ceiling surface construction, and for left side construction, The multiple nozzles for right side construction and ceiling surface construction are attached to a nozzle bracket fixed to the trolley side via an inner diameter moving means that moves in the inner diameter direction following changes in the inner diameter of the structure. This automatic lining device is characterized in that multiple nozzles for bottom surface construction are fixedly attached to a trolley. 2 Movement in the inner radial direction by a nozzle bracket with multiple nozzles attached for left side construction and right side construction, and inner radial movement by a nozzle bracket attached with multiple nozzles for ceiling surface construction. The automatic lining device according to claim 1, characterized in that the automatic lining device is configured to be different from the surface. 3 Guide rollers are installed at the front and rear of the truck to press the side walls of the structure via elastic bodies, respectively.
The automatic lining device according to claim 1, wherein the automatic lining device is configured to hold the cart at an equal distance from the side wall. 4. Claim 1, characterized in that the cart is equipped with a material tank for storing the sprayed material, a pump for discharging the material, an air supply means for operating the pump, and a power means for driving the cart. The automatic lining device described in Section.