JPH0526488Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bubble tube fixedly placed on a telescope, and more particularly to a telescope bubble tube made of synthetic resin and equipped with an aiming part.

[Prior Art] Conventionally, as shown in FIG. 4, a bubble tube 42 has been fixedly mounted on a sighting telescope 41 of a surveying instrument 40 in parallel to the line of sight of the telescope. The line of sight of the telescope is leveled while visually checking the tube 42. Therefore, when fixing the bubble tube to the telescope, it is necessary to adjust and fix the bubble in advance so that the bubble is in the center of the bubble tube when the telescope is horizontal. The structure of the bubble tube 42 is usually the fifth one.
As shown in the figure, the elongated glass bubble tube body 5
1 and a rectangular frame 52 that houses the vial, and the space 56 between the vial main body 51 and the frame 52 is filled with plaster or the like, so that they are fixed together. An open portion 5 is provided on the upper surface of the frame 52.
2a is formed, and the bubble tube main body 51 can be visually recognized from this open portion 52a. Visible vial main body 5 visible from the open part 52a of this frame 52
A scale-like index 57 is written on the side of 1.
This allows the telescope line of sight to be leveled while checking the position of the bubble. Further, a fixing screw 53 and an adjusting screw 54 are provided at both ends of the frame body 52, respectively.
The through hole for the adjustment screw 54 is formed with a wide diameter at the lower part, and a spring member 55 is interposed therein. The conventional bubble tube has the above-described configuration, and is fixed on the telescope while being adjusted with the fixing screw 53 and adjustment screw 54 so that the bubble tube is centered when the telescope is horizontal. . Further, the fixing screw 53 and the adjusting screw 54 have their heads specially processed into a pointed shape as shown in FIG. It is also used as

[Problems to be solved by the invention] As mentioned above, a telescope vial is manufactured by placing the vial body within a frame and filling the space between the vial body and the frame with plaster or the like. , the index forming surface of the bubble tube body and the mounting surface are not always parallel,
This will need to be adjusted during installation. That is, after fixing one end of the vial to the mounting surface of the telescope with the fixing screw, the adjustment screw at the other end must be used to adjust the bubble so that the bubble is in the center of the vial when the telescope is horizontal. The work is not easy.
In addition, since the conventional vial body is made of glass, it is easily damaged, and the manufacturing process is complicated, such as storing it in a frame filled with plaster etc. to protect it. Only a portion of the top is open, so the vial can only be seen from above. Furthermore, in order to use the fixing screws and adjustment screws that attach the bubble tube to the telescope as sighting parts (so-called sighting stars), the tips of these screws are processed into a special shape, making them more difficult to use than normal screws. It's much more costly.

An object of the present invention is to provide a telescope vial that has a sighting section that is hard to break, visible from any position, and easy to manufacture.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and the telescope bubble tube according to the present invention has the following configuration. That is, in a telescope vial that is fixedly mounted on a reference surface formed on a telescope of a measuring instrument, a vial body made of transparent synthetic resin forms a liquid injection part into which liquid is injected leaving air bubbles; and an aiming section formed on the center line of the upper surface of the vial body, and the aiming section is formed integrally with the vial body.

It is also possible to configure the bubble tube to be adjustable. In this case, an extension is formed at one end of the bubble tube body, and a fixing screw is provided in this extension. A lid is formed on the other end, and an adjustment screw with a spring member interposed therein is disposed on the lid. The bubble tube is configured to be adjustable by an adjustment screw on the lid.

[Function] Since the telescopic bubble tube of the present invention is made of transparent synthetic resin, bubbles can be visually recognized from all angles. Also, since it is made of synthetic resin, it is less likely to be damaged than a conventional glass vial. In addition, since they are integrally molded from synthetic resin, the aiming part and the vial can be integrally molded, and the so-called vial attachment surface, which is the reference surface formed on the telescope, and the bottom surface of the vial can be fully joined. I can do it. Furthermore, the distance between the bubble moving surface and the bottom surface of the vial can be formed without varying the distance between the bubble moving surface and the bottom surface of the vial when forming and attaching the vial, unlike conventional vials. Moreover, if the bubble tube is configured to be adjustable, accuracy can be further improved.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. Note that the members, materials, arrangement, etc. described below do not limit the present invention, and can be modified in various ways without departing from the spirit of the present invention.

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a longitudinal cross-sectional view, and FIG. 1B is a cross-sectional view taken along the line - in FIG. 1A. The bubble tube S of this example is mounted on a telescope 41 in the same way as the bubble tube 42, as shown in FIG. 4 of the conventional example. Therefore, in the following embodiments, a bubble tube mounted on the reference plane 10 of a telescope will be described. The vial S of this example has a rectangular parallelepiped shape made of a transparent synthetic resin material, and the inside of the vial body 1 contains air bubbles (gas).
A liquid injection part 3 for injecting the liquid R (usually a mixture of alcohol and ether) except for the part 4 is formed in a substantially cylindrical shape, and a scale-like indicator 3b is marked on the bubble movement surface 3a. ing. Further, a V-shaped groove 2 as shown in FIG. 1B is formed in the longitudinal direction on the center line of the upper surface of the bubble tube body 1, and this groove 2 is used to bring the target into the field of view of the telescope during measurement. It functions as a sighting part, or a so-called sighting star.

In order to inject liquid into the liquid injection part 3, an opening 7 is formed in advance at one end of the liquid injection part 3, and after the liquid is injected from this opening 7, the lid 5 made of synthetic resin is closed to the opening 7. Seal 7.

In this embodiment, the shape of the aiming part is formed into a V-shaped groove, but the shape is not limited to this, and a mountain-shaped projection may be formed on the center line of the upper surface of the vial body 1.

As described above, since the vial S of this example is integrally molded from synthetic resin, the reference surface 10 (the vial mounting surface) formed on the telescope and the bottom surface 6 of the vial S are in contact with each other over the entire surface. Since it is easy to form the bottom surface 6 so that they are in contact with each other, and the entire bubble tube S can be constructed in one piece, the bubble movement surface 3a
The distance between the bottom surface 6 and the bottom surface 6 does not vary during formation and attachment of the vial S, and can easily be kept constant.

Therefore, as shown in FIG. 1A, the bubble tube S
can be fixedly mounted directly on the telescope by means such as gluing. Therefore, it is possible to provide a product that is easy to manufacture and inexpensive.

FIGS. 2A and 2B show a second embodiment of the present invention. In this example, the same members and the like as those in the first example are given the same reference numerals and their explanations will be omitted.

In the above embodiment, the V-shaped groove 2 was formed in the longitudinal direction to serve as a front sight, but in this embodiment, as shown in Fig. 2A, a mountain-shaped protrusion 21 and a V-shaped groove 22 are formed at both ends on the center line of the top surface of the vial body 1. In this way, the front sight can be constructed by forming various shapes such as a recess, a protrusion, or an uneven portion on the center line of the top surface of the vial body 1.

Figures 3A to 3C show a third embodiment of the present invention. In this example, the same members and the like as those in the first and second embodiments are given the same reference numerals and their explanations will be omitted.

This example relates to a vial used when higher precision is required than in the first and second embodiments, and as shown in FIGS. 3A to 3C, the vial body 1 is It has an adjustment mechanism on both sides. That is, FIGS. 3A and 3
As shown in Figure B, an extension 31 is formed integrally with the vial body 1 at one end side of the vial body 1. Then, an insertion hole 33a for the fixing screw 33 is bored in this extension part 31. The bottom surface 31b of the extension portion 31 in this example is formed with a curved surface centered on the insertion hole 33a.

Further, on the opposite side from the extension part 31, a lid body 32 is attached to the opening part 7 of the liquid injection part 3. The lid body 32 is provided with an insertion hole 34a for the adjustment screw 34,
A wide-diameter notch 35a for inserting a spring member 35 (compression coil spring in this example) is continuously formed in the lower part of the adjustment screw insertion hole 34a to constitute an adjustment mechanism.

When configured as in this example, the bottom surface 3 of the extension portion 31
The bubble tube main body 1 can be adjusted by adjusting the curved surface of 1b and the adjusting screw 34 with a spring member 35 interposed therebetween. Note that if configured as in this example, the fixing screw 33 and the adjusting screw 34 do not need to function as an aiming section, and ordinary inexpensive screws can be used.

[Effects] Since the vial of the present invention is made of transparent synthetic resin, the bubbles within the vial can be visually recognized from any angle and are less likely to be damaged. Furthermore, since the aiming part and the bubble tube main body are integrally formed of resin, there is no need to separately form the aiming part as in the conventional case. Moreover, the bubble moving surface of the bubble tube can be formed at a constant distance from the reference surface of the telescope. Furthermore, even when a vial attachment adjustment mechanism is provided, since the vial and the aiming section are integrated, there is no need to use specially shaped adjustment screws.

[Brief explanation of the drawing]

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a sectional view in the longitudinal direction of the bubble tube, FIG. 1B is a cross-sectional view taken along the line - in FIG. 1A,
2A and 2B show a second embodiment, in which FIG. 2A is a perspective view, FIG. 2B is a cross-sectional view taken along the - line in FIG. 2A, and FIGS. 3A to 3C are a third embodiment of the present invention. FIG. 3A is a perspective view, FIG. 3B is a cross-section taken along the line - 3A in FIG. 3A, and FIG.
The figure is a cross-sectional view taken along the line -- in FIG. 3B, FIG. 4 is a schematic explanatory view of a conventional goniometer equipped with a bubble tube, and FIG. 5 is a cross-sectional view of a conventional telescope bubble tube. S...Telescope vial, 1...Bubble tube body, 2,
22... V-shaped groove (aiming part), 21... mountain-shaped protrusion (aiming part), 3... bubble tube injection part, 4... air bubble,
5, 32... Lid, 6... Bottom of bubble tube, 7... Opening, 10... Telescope reference plane, 33... Fixing screw, 34... Adjustment screw, 40... Survey instrument body, 4
1...Telescope, R...Liquid.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A transparent synthetic resin forming a liquid injection part into which liquid is injected leaving air bubbles in a telescope bubble tube that is fixedly placed on a reference surface formed on a telescope of a surveying instrument. 1. A telescope vial, comprising: a vial body made of aluminum, and an aiming part formed on the center line of the upper surface of the vial body, the aiming part being molded integrally with the vial body. 2. An extension portion provided with a fixing screw is formed on one end side of the bubble tube body, and a lid body provided with an adjustment screw interposed with a spring member is formed on the other end side, and the adjustment screw of the lid body is formed on the other end side. 2. The telescope level according to claim 1, wherein the level is adjustable.