JP2000135688A - Marking level - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply marking of a bench mark with high accuracy by one surveying engineer by securing the horizontal of a shooting device for correcting an inclination by an inclination correcting device on the basis of output of an inclination detector, and shooting a mark bullet from the shooting device by a trigger mechanism. SOLUTION: An inclination correcting device 40 provided between a stand 18 and a shooting device frame 21 is composed of a screw shaft 42 lifted by a pulse motor 41 rotating according to output of an inclination detector 35 and a pressing object projection 43 arranged on the shooting device frame 21 side. The pulse motor 41 of a trigger mechanism 30 is normally or inversely revolvingly driven on the basis of a detecting value of a horizontal state of a shooting device 20 by an inclination detector 35, and the shooting device frame 21 is tilted with a tilting shaft 22 as the center to secure the horizontal of the shooting device 20. An electric current is carried to a ratchet 32 by waiting for a press of a shooting switch 45 after confirming the horizontality to release locking of a piston rod 26. Thus, a marking bullet 50 is shot to apply marking on a target or a transfer material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level for marking a target by measuring a benchmark, and more particularly to a marking level having a marking function by itself.

[0002]

BACKGROUND OF THE INVENTION Prior art levels have a collimating telescope for collimating a target. The surveying technician leveled the collimating line of the collimating telescope at the survey point,
While aiming at the water mark on the target, the marking personnel were waiting near the target point and marking the water mark on the target according to the hand signal of the surveyor.

[0003] As described above, the conventional level requires at least two persons, ie, a surveying operator and a marking staff, to mark a benchmark. In addition, the level point position is informed to the marking personnel by a hand signal of the surveying worker, and is indirectly apt to be inaccurate because of the indirect procedure of marking by the marking personnel.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to obtain a marking level at which a surveying technician can mark a benchmark with high accuracy by himself, based on the above-mentioned problem awareness of the conventional level.

[0005]

SUMMARY OF THE INVENTION The present invention eliminates the need for marking personnel if a mark bullet is fired horizontally instead of a horizontal collimation line conventionally collimated by a collimating telescope and marked with the mark bullet, In addition, the present invention has been completed based on the viewpoint that sufficiently accurate marking can be performed if the distance to the target point is relatively short.

[0006] The marking level according to the present invention is based on a tilt detector for supporting a launching device of a mark bullet on a gantry, detecting a tilt of the firing device from a horizontal direction, and a firing device based on an output of the tilt detector. Is provided with an inclination correction device that corrects the inclination of the firing device so as to fire the mark bullet horizontally, and in a state where the firing device is kept horizontal, the trigger mechanism causes the firing device to fire the mark bullet. It is characterized by doing. It is practical that the gantry is supported on a leveling table whose inclination can be adjusted via a leveling screw so as to be rotatable about a vertical axis, and the launching device is tilted about the tilt axis on the gantry. It is practical to support as much as possible.

As a mark bullet, a self-coloring material having a color forming member at its tip end, or a non-self-coloring material having a mark on a transfer material provided on a target is used. be able to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Marking Level 1 According to the Present Invention
0, as shown in FIG. 1, for example, a bottom plate 14 fixed on a camera platform 12 of a tripod 11 via a tripod screw 13, and an inclination angle on the bottom plate 14 via three leveling screws 15. It has a collimation table 16 that is supported so as to be adjustable, and a gantry 18 that is rotatably supported on the collimation table 16 via a vertical shaft 17.

A launcher frame 21 having a mark bullet launcher 20 is supported on the gantry 18 by a tilt shaft 22 so as to be tiltable. The firing device 20 has a structure similar to an air gun, and has a barrel 23 extending in a direction perpendicular to the tilting axis 22 without intersecting with the tilt axis 22, and a cylinder (pressure chamber) 25 fitted with a piston 24 behind the barrel 23. Is provided. The piston 24 is connected to a piston rod 26, and the piston rod 26 is urged by a tension spring 27 in a direction in which the volume of the cylinder 25 by the piston 24 is reduced. The piston rod 26 is attached to the launcher frame 2
1 and a finger hook 28 is formed on the protrusion.

[0010] In the firing device frame 21, the piston rod 2
A trigger mechanism 30 is provided for triggering after holding 6 at the firing standby position. The trigger mechanism 30 includes a shaft 31
And a ratchet 32 rotatable around the lever and engaged with the stopper projection 26a of the piston rod 26.
A tension spring 33 for urging the rotation of the ratchet 32 in the direction of engagement with the stopper projection 26a; It consists of When the ratchet 32 pulls the piston rod 26 against the force of the tension spring 27, the ratchet 32 engages with the stopper projection 26a and stops its movement (a firing standby position).

[0013] An inclination detector (tilt sensor) 35 is also provided on the launcher frame 21. The tilt detector 35 is a well-known type. In addition to providing three electrodes 37 at intervals on the lower surface of an arc-shaped bubble tube 36, a conductive liquid 38 is sealed in the bubble tube 36 together with a certain amount of air. It was done. When the bubble tube 36 is tilted, the bubble tube 36
Since the distribution state of the conductive liquid 38 in the inside changes,
The resistance value between the electrodes 37 changes. By detecting the change in the resistance value, the inclination angle from the horizontal direction can be detected. In this example, the tilt detector 35 detects a tilt angle of the barrel 23 of the firing device 20 from the horizontal direction.

A tilt correcting device 40 is provided between the gantry 18 and the launcher frame 21 to adjust the tilt angle of the launcher frame 21 (the launch device 20) based on the output of the tilt detector 35. The tilt correction device 40 includes a pulse motor 41 that rotates in accordance with the output of the tilt detector 35 and a screw shaft 42 that is driven to rotate by the rotation of the pulse motor 41 and moves up and down on the side of the gantry 18 away from the tilt shaft 22. On the other hand, a projection 43 to be pressed by the screw shaft 42 is provided on the firing device frame 21 side. The firing device frame 21 is provided with a firing switch 45 separately.

The above-described trigger mechanism 30 (trigger solenoid 34), tilt detector 35 (electrode 37), tilt correction device 4
0 (pulse motor 41) and the firing switch 45
Is connected to a control circuit (CPU) 46 as shown in FIG.

FIGS. 3 to 5 show examples of mark bullets used in the firing device 20. FIG. FIG. 3 shows a self-coloring mark bullet 50 in which a capsule 53 containing an ink 52 is provided at the tip of a bullet 51 made of a flexible material such as rubber or resin, and FIG. This is a self-coloring mark bullet mark bullet 50 'in which a porous color-containing member 54 containing ink or pigment is provided in the portion. On the other hand, FIG.
Is a non-self-coloring mark bullet 50 "composed of only similar bullets 51.

3 and 4, the ink 52 or the mark bullet 5 in the capsule 53 of the mark bullet 50 is placed on the target 60.
Marking is performed by attaching the ink in the porous color-containing member 54 of 0 '. In the example of FIG. 5, a transfer material 61 is attached to the target 60 in advance, and a mark bullet 50 ″ is fired on the transfer material 61 to mark the transfer material 61.

In the marking level 10 having the above-described structure, the bottom plate 14 of the marking level 10 is fixed on the camera platform 12 of the tripod 11 in advance, and the leveling screw 15 is used to roughly adjust the level of the collimation platform 16 (mount 18). Then, the piston rod 26 of the firing device 20 is pulled to maximize the volume of the cylinder 25, and the ratchet 32 of the trigger mechanism 30 holds the piston rod 26 at the firing standby position. In addition, the gantry 18
Is rotated about the vertical axis 17 to direct the firing device 20 in the target direction. After completing the preparation in this way, it is used as follows. FIG. 6 is a flowchart thereof.

The tilt detector 35 detects the horizontal state (tilt from horizontal) of the firing device 20 (barrel 23), and based on the detected value, drives the pulse motor 41 of the trigger mechanism 30 forward or backward by a predetermined angle. Then, the launching device frame 21 is tilted about the tilting shaft 22 so that the launching device 20 is horizontal (steps S1 and S2). Then, after the level is confirmed, it waits until the firing switch 45 is pressed (step S3,
S4) The ratchet 32 is energized to release the engagement of the piston rod 26 with the ratchet 32 (step S4).
5). Then, a mark bullet 50 (50 ', 50 ") is fired, and marking is performed on the target object 60 or the transfer material 61 (step S6).

1, the cylinder 25 for obtaining the firing pressure of the mark bullet 50 (50 ', 50 ") is drawn as a simple cylinder device composed of the piston 24. Actually, various pressurizing devices such as those used in an air gun can be used, and if necessary, compressed air can be separately sent into the cylinder 25. Mark bullet 5
The loading method of 0 (50 ', 50 ") does not matter.

One of the features of the marking level of the present invention is that a collimating telescope is not required in principle, but a simple telescope may be provided in order to confirm the launch direction of the launch device.

[0020]

According to the present invention, a mark can be marked on a horizontal collimation line by firing a mark bullet with the firing device directed in the horizontal direction. Therefore, a leveling mark can be marked by a surveying technician alone, and sufficiently high-precision marking can be performed at a distance where horizontal flight of a mark bullet from the launch device is guaranteed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a marking level of the present invention.

FIG. 2 is a block diagram showing an example of a marking level control system of FIG. 1;

FIG. 3 is a cross-sectional view illustrating an example of a mark bullet.

FIG. 4 is a cross-sectional view showing another example of a mark bullet.

FIG. 5 is a sectional view showing still another example of a mark bullet.

FIG. 6 is a flowchart illustrating an operation example of a marking level in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Marking level 11 Tripod 14 Bottom plate 15 Leveling screw 16 Collimation stand 17 Vertical axis 18 Mount 20 Launching device 21 Launching device frame 22 Tilt axis 23 Barrel 24 Piston 25 Cylinder (pressure chamber) 25 Piston rod 27 Tension spring 30 Trigger mechanism 32 Ratchet 33 Tension spring 34 Trigger solenoid 35 Tilt detector 36 Bubble tube 37 Electrode 38 Conductive liquid 40 Tilt correcting device 41 Pulse motor 42 Screw shaft 43 Pressed protrusion 45 Fire switch 46 Control circuit 50 50 'Mark bullet (self-coloring) 50 "mark (non-self-coloring) 51 bullet 52 ink 53 capsule 54 porous color-containing member

Claims (4)

[Claims] A frame; a launching device for mark bullets supported by the platform; a tilt detector for detecting a tilt of the firing device from a horizontal direction;
A marking level, comprising: a tilt correcting device that corrects a tilt of the firing device so that the firing device fires a mark bullet horizontally; and a trigger mechanism that fires a mark bullet from the firing device. 2. The leveling device according to claim 1, wherein the gantry is supported on a leveling table whose inclination can be adjusted via a leveling screw so as to be rotatable around a vertical axis. ,
Marking level supported on the gantry so that it can tilt about the tilt axis. 3. The marking level according to claim 1, wherein the mark bullet has a self-coloring property having a coloring member at its tip portion for coloring itself. 4. The level device according to claim 1, wherein the mark bullet has a non-self-coloring property in which a mark is formed on a transfer material provided on a target.