JP4623409B2 - Transit target - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surveying device used in a non-open-cut underground piping method in which a buried pipe is propelled into the ground on a planned line of piping, in particular, the light of a target illuminator installed inside the propulsion head. It relates to the target of a transit that is surveyed by direct observation.
[0002]
[Prior art]
In recent years, in the construction of underground pipes such as telephone lines and electric lines, and sewer pipes, instead of the construction method where the pipes are buried by excavating the ground surface due to traffic conditions and the feelings of nearby residents, etc. There is known a non-open-cut underground pipe construction method in which a start shaft and a reach shaft are provided at a distance of distance, and a buried pipe is pushed through the soil from the start shaft to the reach shaft and piped between the start shaft and the reach shaft. It has been.
[0003]
The uncut underground pipe construction method is roughly classified into a one-step promotion method and a temporary pipe two-step promotion method, and various devices and construction methods are used as a propulsion device for laying a small-diameter pipe by the one-step promotion method. One of them is a propulsion machine that pushes the buried pipe into the soil, a screw conveyor for discharging soil that is set in the buried pipe, and a propulsion head that incorporates a surveying target inside. The screw conveyor is set in the buried pipe, the propulsion head is attached to the tip of the first screw conveyor, and the buried pipe with the propulsion head set at the head is set by the propulsion unit. The screw conveyor is pushed through the shaft into the ground, and the screw conveyor becomes a tube shaft that penetrates both ends. From the back of the propulsion machine, the screw conveyor is passed through the inner cylinder of the screw conveyor. While directly adjusting the propulsion direction to match the planned center line by looking directly at the light of the target illuminator provided in the propulsion head, the buried pipes are successively added to reach the reaching shaft, and between the starting shaft and the reaching shaft A propulsion device and a construction method for laying a buried pipe are well known.
[0004]
In the temporary pipe two-step propulsion method, the propulsion head is attached to the tip in the first step, and then the lead pipe is sequentially added and propelled from the starting shaft to the reaching shaft, and the propulsion head has a survey target. When the lead pipe is propelled, the propulsion direction is centered by looking directly at the light of the target illuminator mounted on the propulsion head through the inner pipe of the lead pipe from behind the propulsion unit by transit. After adjusting to reach the vertical shaft and confirming the arrival accuracy, in the second step, the lead pipe is used as a pilot and a cutter head having a rotary joint is connected to the last part of the lead pipe. Excavation is carried out by adding the buried pipe while carrying the earth and sand to the starting side with the screw conveyor set in the buried pipe. To reach to reach pit, method of laying the buried pipe is known between the starting pit and arrival pit.
[0005]
Wherein in one step or temporary tube two steps jacking method of trenchless by transit, more constantly monitors the movement of the target on visual, little by little repeatedly direction correcting so that the center point of the target is not always deviate from transit crosshairs line Is called. This direction correction operation is carried out through the screw conveyor in the one-step propulsion method, and through the inner pipe of the lead pipe in the temporary tube two-step propulsion method. It must be clearly visible across the board.
[0006]
However, this type of conventional transition target provided in the propulsion head has a light emitter at the center point position of the surface (b) of the display panel (a) as shown in FIGS. The lamp (c) is provided, and a correction lamp (d) is provided at a predetermined interval on a vertical line passing through the center point of the display surface (b), or at a predetermined interval on a horizontal line passing through the center point. A correction lamp (d) is provided, and these lamps (c) and (d) are installed in a state of protruding on the display surface (b) of the display board (a), and the display board (a) The display surface (b) remains in the color of the material other than black. For example, in many cases, the color of timber or synthetic resin appears as it is.
[0007]
In the conventional target having such a structure, at a distance of 50 to 100 m , a plurality of light emitters provided on the display surface of the target, that is, a plurality of lamps (c) and (d) are clearly distinguished and visually recognized. Even at a long distance exceeding 100 m , the light from the illuminant diffuses, and the light from the illuminant is reflected on the display surface. As a result, it becomes difficult to clearly distinguish the individual lamps from each other, and as a result, it becomes impossible to survey the exact position of the propulsion head, and it is impossible to correct the correct propulsion direction. ing. Therefore, even if the propulsion unit has a propulsion performance of 200 m or more, it is impossible to observe such a long distance as a surveying instrument, especially a target that is a target display device of a transit. The current situation is that the distance between the starting shaft and the reaching shaft is kept within 100 m. Incidentally, the cost of constructing one shaft is enormous and time-consuming, so increasing the propulsion distance saves piping costs significantly and shortens the construction period. Moreover, depending on the construction conditions, the number of places where conditions cannot be cut at a distance of 200 m is increasing today, and the appearance of a surveying instrument capable of non-cutting work at 200 m is awaited.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and its object is to suppress the diffusion of light of a light emitter, that is, a lamp, and to absorb all light reflected on the display surface of the display panel. An object of the present invention is to provide a transition target in which light from a plurality of lamps can be clearly seen individually.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the transit target according to the present invention has a concave recess that houses a main lamp at the center point position of the display surface of the display panel, and is predetermined from the center point on a vertical line or a horizontal line passing through the center point. At least one recess for repairing at least one correction lamp is provided at intervals, and each recess is provided with a taper that reduces the diameter toward the display surface, and the main lamp and the correction lamp are displayed on the display board. It is retracted to a depth of 2 to 5 mm from the surface and installed in each recess, and the display surface of the display board is colored black, and the main lamp and the correction lamp are individually connected from a distance of 200 m. It is characterized by having a visible structure.
[0010]
The target of the transit according to the present invention has at least one recess at a predetermined interval from the center point on a vertical line and a horizontal line passing through the center point, and having a concave portion that houses the main lamp at the center point position of the display surface of the display panel. Recesses for repairing the correction lamps are drilled, each of these recesses is provided with a taper that reduces the diameter toward the display surface side, and the main lamp and the correction lamp are 2 to 5 mm deep from the display surface of the display board. The display panel of the display panel is colored in black, and the main lamp and the correction lamp are individually visible from a distance of 200 m. It can also be a feature.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. Figure 1 is approximate schematic diagram of propulsion units used for underground piping construction method of the present invention, FIG 2 is a view showing the step of promoting towards a buried pipe from starting pit to arrival pit, propulsion machine 1 is the driving body 2 The hydraulic jack 3 allows the bed 4 to be moved forward and backward, the screw conveyor 5 is set in the buried pipe 6, and a propulsion head 7 is attached to the tip of the screw conveyor 5 that is the earliest. , The embedded pipe 6 on which the screw conveyor 5 is set is pressed by the hydraulic jack 3 of the propulsion unit 1 to push and propel it from the start shaft A into the ground as shown in FIG. 2, and the screw conveyor The underground pipe 6 in which 5 is set is sequentially added, and the soil is propelled toward the reaching shaft B.
[0012]
A surveying instrument, that is, a transit 8 is installed behind the propulsion unit 1, a target 9 of the transit 8 is built in the propulsion head 7, and the screw conveyor 5 is formed on a hollow shaft that penetrates both ends. Then, the transit 8 installed at the rear part of the propulsion unit 1 confirms the propulsion position by directly viewing the light of the light emitter of the target 9 provided in the propulsion head 7 through the inner cylinder of the screw conveyor 5 and plans the propulsion direction. The buried pipe 6 in which the screw conveyor 5 is set is sequentially added while being corrected so as to coincide with the center line, and is pushed and pushed into the soil to reach the reaching shaft B. As shown by the chain line in FIG. It collects in the reaching shaft B, and the screw conveyor 5 is recovered on the start shaft A side. Then, the buried pipe 6 is laid between the starting vertical shaft A and the reaching vertical shaft B.
[0013]
As shown in FIG. 3, the target 9 is formed of a power source, that is, a cylinder main body 11 that houses a dry battery 10 and a tip cylinder 13 that houses a display plate 12 provided with a light emitter, and the light emitter is wired on the back surface of the display plate 12. The lead battery 14 is electrically connected to the dry battery 10 through the lead wire 14.
[0014]
Further, the propulsion head 7 uses a slanted tube whose tip is cut obliquely so that the direction can be corrected in the ground.
[0015]
In the present invention, as shown in FIGS. 4 and 5, the target 9 is configured such that the display plate 12 is a substantially disk having a predetermined thickness, and a concave 16 for a main lamp is formed at the center point position of the display surface 15. emitters the concave recess 16 Te, i.e. set up a main lamp 17, also concave on the vertical line passing through the center point, and drilled a recessed 18 for at least one modified lamp at regular intervals recess 18, the correction lamp 19 is installed, and the leading ends of the main lamp 17 and the correction lamp 19 are retracted from the display surface 15 of the display panel 12 by a predetermined distance, that is, about 2 to 5 mm. It is installed inside and the entire surface of the display surface 15 of the display plate 12 is colored in black.
[0016]
The correction lamp 19 is provided on a vertical line passing through the center point, but is not necessarily limited thereto, and may be provided on the vertical line and the horizontal line, or provided at a predetermined angle passing through the center point. Of course, it may be. The main lamp 17 and the correction lamp 19 preferably use light emitting diodes.
[0017]
In the target 9 having the above-described configuration, the lamps 17 and 19 are installed in the recesses 16 and 18, respectively, so that light diffusion or light scattering of the light emitter is prevented as much as possible from the light source. The black color applied to the display surface 15 illuminates as a light beam that goes straight in a narrow range and absorbs all components of the light reflected on the display surface 15 so that it appears black. Even from a long distance of, for example, 200 m or more, the light emitted from the light emitters, that is, the lamps 17 and 19 can be clearly displayed through the inner cylinder of the conveyor screw 5. ( It was confirmed from the experimental results ) . Therefore, the direct vision ability is improved to 200 m or more, and as a result, propulsion is possible while correcting the direction so that the soil of 200 m or more matches the planned center line.
[0018]
As shown in FIG. 6, the concave 16 for the main lamp and the concave 18 for the modified lamp are provided with a slight taper 20 so that the diameter decreases toward the display surface 15. , 18, the diffusion of light of the lamps 17, 19 provided at the position deeper than the taper 20 is suppressed, and even at a long distance of 200 m or more, compared to the case without a taper, The lamps 17 and 19 are more clearly distinguished and can be visually recognized (confirmed from the experimental results).
[0019]
Further, in the embodiment of the present invention, the propulsion head 7 is connected to the screw conveyor 5 set in the buried pipe 6 and explained by the one-step propulsion method. Of course, it is also used for a temporary pipe two-step propulsion method connected to a pipe.
[0020]
【The invention's effect】
Since the present invention is configured as described above, the lamp, i.e., the illuminant is drawn in from the display surface of the display panel to suppress the diffusion of the light from the illuminant and to reflect all the light reflected on the display surface of the display panel. The present invention provides a transit target that absorbs the components so that a plurality of light emitters can be clearly seen individually from a distance of 200 m or more, and the direct viewing ability of the surveying instrument is improved to 200 m or more. Therefore, it is possible to construct the distance between the starting shaft and the reaching shaft at an interval of at least 200 m. As a result, the construction period can be extremely shortened, and the construction cost can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is a schematic view of a propulsion device.
FIG. 2 is a process diagram showing a state in which a buried pipe in which a screw conveyor is set is propelled from a starting shaft to a reaching shaft.
FIG. 3 is a longitudinal front view of the target of the present invention.
FIG. 4 is a front view showing a display surface of a target display board of the present invention.
FIG. 5 is a cross-sectional view of a target display plate of the present invention.
FIG. 6 is a cross-sectional view showing a taper in each recess of the target display plate of the present invention.
7A and 7B show a conventional target, where FIG. 7A is a front view showing a display surface of the display board, and FIG. 7B is a cross-sectional view of the display board.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Propulsion machine 2 Drive body 3 Hydraulic jack 4 Bed 5 Screw conveyor 6 Buried pipe 7 Propulsion head 8 Transit 9 Target 10 Dry cell 11 Cylinder body 12 Display board 13 Tip cylinder 14 Lead wire 15 Display board 16 Concave 17 Main lamp 18 Concave 19 Ramp 20 for correction Taper A Starting shaft B Reaching shaft

Claims (2)

A depression that accommodates the main lamp at the center point position of the display surface of the display board is provided, and a depression that repairs at least one correction lamp at a predetermined interval from the center point on a vertical line or a horizontal line passing through the center point. Each of these recesses is provided with a taper that reduces the diameter toward the display surface side, and the main lamp and the correction lamp are retracted to a depth of 2 to 5 mm from the display surface of the display plate, and each recess is recessed. A transit target characterized in that it is installed in a recess and the display surface of the display plate is colored black so that the main lamp and the correction lamp can be individually viewed from a distance of 200 m . A depression that accommodates the main lamp at the center point position of the display surface of the display board is drilled, and a depression that repairs at least one correction lamp at a predetermined interval from the center point on a vertical line and a horizontal line passing through the center point. Each of these recesses is provided with a taper that reduces the diameter toward the display surface side, and the main lamp and the correction lamp are retracted to a depth of 2 to 5 mm from the display surface of the display plate, and each recess is recessed. A transit target characterized in that it is installed in a recess and the display surface of the display plate is colored black so that the main lamp and the correction lamp can be individually viewed from a distance of 200 m .

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