JPH0425667Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial field of application] This invention relates to a target ball equipped with a prism on the head for collimation of a light wave distance meter used in distance measurement work, and is used by various companies (Nikon, Pentax, etc.). It has been devised so that it can be used with prisms manufactured by companies such as , Topcon, and Sokkisha.

[Prior Art] and [Problems to be Solved by the Invention] Conventionally, this type of target ball was equipped with a prism made by a specific company, so it was not possible to attach and use a prism made by another company.

[Means for Solving the Problems] The present invention solves the above problems by making it possible to install and remove the auxiliary ring.

〔Example〕

In the embodiment shown in the figure, an outer cylinder 1 whose peripheral surface is painted with an alternating color scheme such as red and white, and an inner cylinder body 2 whose peripheral surface is painted with an alternate color scheme such as red and white are tightened and loosened by a tightening device 3. A lower cap 6 formed by a large diameter portion 4 and a narrow diameter portion 5 is irremovably fitted to the lower end of the outer cylinder 1, and the large diameter portion of the lower cap 6 is connected telescopically upward. A screw hole 7 communicating inside and outside is bored in the side surface of 4, and a lower tightening screw 8 is screwed into the screw hole 7, and separately from this, one half is formed into a pointed conical portion 9 and the other half is formed into a pointed conical portion 9. The stone protrusion body 12 has a truncated cone-shaped part 10 in half and a short cylindrical part 11 in the middle, and a collar part 13 is provided in the middle of the cylindrical part 11, and a flange part 13 is provided at a position near both ends of the cylindrical part 11. Annular V-shaped grooves 14 and 15 are provided on the outer periphery, respectively, and the pointed conical portion 9
Alternatively, the truncated conical portion 10 is attached to the lower cap 6.
When the lower tightening screw 8 is screwed down, the tip of the tightening screw 8 will fit into the V-shaped grooves 14 and 15, and the flange 11 will abut against the edge surface of the cap 6. The head body 12 is fixed to the lower end of the outer cylindrical body 1 in such a way that it can be inserted and replaced, and the upper cap 19 formed by the large diameter portion 17 and the narrow diameter portion 18 at the upper end of the inner cylindrical body 2 cannot be removed. and a recess 20 on the top surface of this upper base 19.
A screw hole 21 is formed in the bottom surface of the recess 20, and the screw hole 21 opens at the tip of the narrow diameter portion 18. A prism mounting adapter 25 is constructed, a screw hole 26 communicating between the inside and the outside is formed in the wall of the cylindrical portion 23, a prism fixing tightening screw 27 is screwed into the screw hole 26, and these and other screws are screwed together. Separately, a small diameter ring portion 29 of a size that can be fitted into the above-mentioned recess 20 and a large diameter ring portion 30 of a size that cannot be fitted into the recess 20.
The screw portion 24 of the adapter 25 is inserted into the auxiliary ring 31, and the screw portion 24 is inserted into the screw hole 2 of the upper cap 19.
It is screwed in so that it can be removed from above 1.

In the figure, 33 and 34 are the collection chuck and tightening ring that constitute the tightening device 3, 35 is a rattling prevention ring, 36 is a spirit level, 37 is an element type prism, and 38 is used for setting the prism 37. The pillar 39 is an annular V groove provided in the pillar 38, 4
0 indicates the size scale.

[Effect]

That is, in the above embodiment, first, depending on the hardness or softness of the ground, the stone protrusion body 12 is set in a state where the pointed conical portion 9 is on the lower side or the truncated conical portion 10 is on the lower side, and When the prism 37 is made by Nikon, the auxiliary ring 31 is oriented so that the large-diameter ring portion 30 is on the top side, and when it is made by Pentax and Topcon, the auxiliary ring 31 is placed so that the large-diameter ring portion 30 is on the bottom side. In the case of the prism 37 made by Sokkisha Co., Ltd., the auxiliary ring 31 is removed.

[Effect of idea]

The present invention includes a cylindrical pole, a base 19 that is irremovably attached to the upper end opening of the cylindrical pole, and a base 19
A recess 20 is formed in the upper surface, a deep screw hole is formed in the bottom of the recess 20, and the upper half is formed into a cylindrical portion 23.
a prism mounting adapter 25 whose lower half is a threaded rod portion 24; a prism fixing tightening screw 27 attached to the cylindrical portion 23; and a small diameter ring portion 29 of a size that can be fitted into the recess 20. An auxiliary ring 31 having a shape in which a large-diameter ring part 30 of a size that cannot be inserted is overlapped, and the threaded part 24 of the adapter 25 is inserted into the auxiliary ring 31, and the threaded part 24 is inserted into the threaded hole 21 of the cap. It is characterized by being screwed in so that it can be removed from above, so it can be used with prisms made by various companies (Nikon, Pentax, Topcon, Sokkisha) by attaching and detaching or replacing the auxiliary ring. It has an excellent effect of fully achieving the purpose of the period.

[Brief explanation of the drawing]

The figures show an embodiment of the target pole for a light wave distance meter according to the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is an exploded perspective view, and Fig. 3 is taken along the line A-A in Fig. 1. FIG. DESCRIPTION OF SYMBOLS 1... Outer cylinder, 2... Inner cylinder, 3... Tightening device, 4... Large diameter part, 5... Small diameter part, 6... Lower mouthpiece, 7... Screw hole, 8... ...Tightening screw, 9...Pointed cone-shaped part, 10...Truncated cone-shaped part, 11...
...Cylindrical part, 12... Stone head body, 13... Flange part, 14, 15... V-shaped groove, 17... Large diameter part, 1
8...Small diameter part, 19...Upper cap, 20...Recess, 21...Threaded hole, 23...Cylindrical part, 24...Threaded rod part, 25...Adapter, 26...Screw hole, 2
7...Upper tightening screw, 29...Small diameter ring, 30
... Large diameter ring, 31 ... Auxiliary ring, 33 ...
Collet chuck, 34... Tightening ring, 35...
...Anti-rattle ring, 36...Level, 37
... Prism, 38 ... Pillar, 39 ... Annular V
Groove, 40...Dimension scale.

Claims (1)

[Scope of utility model registration request] A cylindrical pole, a cap 19 irremovably attached to the upper end opening of the cylindrical pole, a recess 20 drilled in the top surface of the cap 19, and a screw hole bored in the bottom surface of the recess 20; A prism mounting adapter 25 whose upper half is a cylindrical part 23 and whose lower half is a threaded rod part 24, a prism fixing tightening screw 27 attached to the cylindrical part 23, and which can be fitted into the recess 20. An auxiliary ring 3 having a shape in which a small-diameter ring portion 29 and a large-diameter ring portion 30 that cannot be inserted are overlapped.
1 and an adapter 25 to the auxiliary ring 31.
A target ball for a light wave rangefinder, characterized in that the screw rod 24 is inserted into the screw hole 21 of the cap and the screw rod 24 is removably screwed into the screw hole 21 of the cap from above.