JP2002122429A - Target device for surveying instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately recognize the center of a target visually from a distance. SOLUTION: A target device for a surveying instrument is provided with a holder 2, which is mounted to a supporting means stood in a surveying point, and an index plate 3 provided with an index 5 serving as a target point collimated from a surveying instrument main body and capable of turning in the horizontal direction to the holder 2. This target device is used for measuring a distance or an angle to the measuring instrument main body. On the surface of the index plate 3, a center guiding means 4 serving as a guide for reading the index 5 is arranged on a vertical plane passing the center of the supporting means 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a target device for a surveying instrument used for measuring a distance or an angle to a surveying instrument main body.

[0002]

2. Description of the Related Art A surveying instrument such as a total station includes a surveying instrument 1 as shown in FIG.
Various target devices 101 for a surveying instrument that are used together with the target device 00 and measure the distance or angle therebetween have been developed.

A target device for a surveying instrument is known in which a pole is set up at a survey point to be measured, such as a distance or an angle, and a target such as a reflection sheet is attached to the pole. When a target is collimated by a telescope provided in the total station main body, data on the distance and angle between the target and the target is measured and displayed.

In order to display such data as accurately as possible, it is necessary to accurately collimate the main body of the total station to the center of the target with a telescope, for example. Therefore, usually, as shown in FIG. 6, for example, in the target device 101, an index 10 indicating the center position of the index plate 102 provided with the target is used.
3, that is, a collimating line such as a concentric circle or a cross is provided, and a black point or the like is displayed at a center portion C where the collimating lines intersect. Further, in such a target device, in order to align the target with the total station as accurately as possible, a horizontal shaft 1 provided on the holder 104 is required.
There is also known one provided with a rotating mechanism that allows the index plate 102 to rotate in the horizontal direction along the line 04A (that is, the line S).

[0005] However, usually, this collimation line is displayed as a thin line or the like, and the black spot or the like at the center is small. Therefore, even if the user looks into the telescope from afar to check the collimation line or the black spot, the like. In some cases, visual recognition is difficult.

Therefore, in order to be able to easily confirm the target central portion even from a distant place, for example, as shown in FIG. Device development is under consideration. That is, in this target device, a center guiding means 105 formed of a triangle is provided on the surface of a holder 107 provided outside the index plate 106, and the tip of the apex of the triangle indicates the center part C. The index plate 106 can rotate upward or downward about the horizontal axis 107A, and the holder 107 is supported by the pole 108 on the ground and stands upright.

By the way, such a target device can be configured so that the center axis of the pole 108 coincides with the surface of the index plate 106 provided with the index in order to perform accurate surveying. . For example, as shown in FIG. 7, the index plate 106 is formed thinner than the holder 107, and the index plate 106
It can be realized by displacing by t.

However, in such a configuration, when the target rotates with respect to the surveying instrument about the center (Z-axis) of the pole 108 and is displaced in either the left or right direction, A shift of Δt occurs between the extension axis of the extension point C and the center guiding means 105.

Further, in such a configuration, the central axis of the pole 108 and the surface of the index plate 106 are arranged on a vertical plane (XZ plane in FIG. 7) through which the survey points to be measured are compared. Even if it is done, as shown in FIG. 8, when surveying at the surveying point, if the surface of the index plate 106 is inclined to face the surveying instrument, the direction indicated by the tip of the triangle A deviation δ occurs between D1 and the direction D0 indicating the target center portion C, resulting in a measurement error.

[0010]

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a target device for a surveying instrument capable of easily and accurately recognizing the center of a target even from a distance.

[0011]

SUMMARY OF THE INVENTION The present invention comprises a holder attached to a supporting means set at a surveying point, and an index plate having an index serving as a target point collimated from the surveying instrument body and rotatable with respect to the holder. A target device for a surveying instrument used when measuring the distance or angle between the surveying point and the surveying instrument body,
Center guide means as a guide when reading the index,
On the surface of the holder or the indicator plate, it is provided on a vertical plane passing through the center of the support means.

The holder and the index plate are attached to the supporting means so that at least the tip of the center guiding means coincides with a vertical plane passing through the surveying point when the supporting means is installed in accordance with the surveying point. Is desirable.

[0013] The guide portion in the horizontal direction of the center guide means may be provided so as to coincide with the horizontal axis attached to the holder.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a target device for a surveying instrument according to the present invention. The target device for a surveying instrument includes a support means 1 and a holder 2.
The center guide means 4 is provided in addition to the index plate 3 and the index plate 3.

The support means 1 is composed of a pole 11 which is a support standing at a surveying point and a tripod (not shown) for fixing and holding the pole 11 in a stable state, similarly to the conventional one. . The pole 11 has an appropriate length (for example, 4
0 cm) rod-shaped members are screwed together and joined together. The supporting means 1 is provided at an appropriate height in the middle of the pole 11 joined together by the holder 2.
Are attached together.

The holder 2 is screwed and attached to the pole 11 serving as the support means 1. If the screwed portion is loosened, the holder 2 can be rotated with respect to the pole 11. The holder 2 of this embodiment has a certain thickness t (FIG. 2A).
As shown in FIG. 2B, male screws (see FIG. 2B) formed at the pole-side end portions are formed on the projecting portions 21 and 22 provided at the upper end portion and the lower end portion, respectively. Omitted)
Female threads 21A, 22A with internal threads threaded into
(Here, only the female screw portion 22A is shown).

The index plate 3 is provided with a horizontal shaft 23 provided on the holder 2.
Is pivotable upward or downward around the center, and an index 5 serving as a target point when collimating from a surveying instrument body (not shown) is located on a central portion side of one surface (hereinafter, referred to as a surface). Have. The horizontal shaft 23 is provided between one end (the left end in FIG. 2) of the index plate 3 and the inner periphery of the holder 2, and a screw is used in this embodiment. On the other hand, the other end (the right end in FIG. 2) of the index plate 3 is integrally formed with a shaft 31 constituting the other horizontal shaft, and the holder 2 facing the shaft 31 is formed.
Is formed with an engagement groove 24 with which the shaft portion 31 engages. When the center axis of the pole 11 is aligned with the survey point, the surface of the indicator plate 3 on which the index 5 is provided is on a vertical plane L (see FIGS. 2B and 5) passing through the survey point. It is provided in.

The index plate 3 of this embodiment is formed of a plate material thinner than the holder 2, and a reflection sheet formed of an appropriate member having a high reflectance is attached to the surface of the index plate 3. At the same time, the indicator 5 is directly printed or adhered to the reflection sheet. In particular, the index plate 3 of this embodiment is formed in a concave shape in which the central portion on the surface side on which the index 5 is provided is depressed.

The index 5 is a target indicating a survey point serving as a reference when measuring the distance or angle to the surveying instrument main body. Various patterns can be used as long as they can be confirmed from a distance. . In this embodiment, a concentric circle and a cross are combined, and the center C where the crosses intersect is collimated as a target. When the pole 11 is set upright in accordance with the surveying point, the index is formed by adjusting the positional relationship so that the center C of the index 5 coincides with the vertical plane L through which the surveying point passes.

The center guide means 4 is provided on the holder 2 or the index plate 3 and serves as a guide for reading the central portion C of the index 5 when collimating from a distance. In this embodiment, the index plate is used. It is provided on the third side. Note that the center guide means 4 may be constituted by guide portions provided at least on the right and left sides of the center of the holder 2. The guide unit according to this embodiment includes a triangular index 41, and the vertex of the triangle points toward the center C of the index 5. The triangle is formed by printing or engraving directly on the surface of the holder, or by attaching a printed seal. The triangular pattern constituting the center guide means 4 may be provided at least on both the left and right sides, and the center guide in the up-down direction may be based on, for example, the pole 11 extending vertically.

Therefore, when measuring the distance or the angle to the surveying instrument main body, even if the index 5 or the center C of the index 5 is difficult to see because the distance is too far, the triangle of the center guide means 4 is used as a guide. The center C of the target index 5 can be confirmed and collimated.

Therefore, when measuring the distance or the angle to the surveying instrument main body, the index plate 3 of this target device is used.
However, it is assumed that the holder 2 is not exactly facing the surveying instrument main body and, for example, the holder 2 itself is deviated rightward or leftward about the pole 11 serving as the support means 1. Also in this case, the index 41 (the same applies to the index 43 described later) coincides with the target center portion C on the extension of the central axis of the pole 11 set at the survey point. As a result, even in the case of a long distance in which the index 5 cannot be visually recognized, the index 41 (43) which is set large for long-range visual recognition can be visually recognized.
By collimating (43), it is possible to collimate the surveying instrument at the target center C even at a long distance where the index 5 cannot be visually recognized.

Similarly, it is assumed that there is an altitude difference between the point where the surveying instrument main body is installed and the surveying point where the target device is located. In such a case, in order to correctly face the target device in a certain direction of the surveying instrument main body, the index plate 3 in the holder 2 of the target device is rotated and inclined in any one of the upper and lower directions around the horizontal axis 23. However, the center C of the index 5 is on the horizontal axis 23. Thus, the center portion C of the index 5 can always be accurately matched with the survey point. As a result, if the center portion C of the index 5 is collimated, the distance or the angle to the surveying instrument main body can be correctly measured.

Next, a second embodiment according to the present invention will be described. FIG. 3 shows a target device for a surveying instrument according to the present invention. In addition to a supporting means (not shown), a holder 2 and an index plate 3, a center guiding means is also provided for the surveying instrument target device. 4 is provided.

Although the holder 2 and the index plate 3 both have substantially rectangular external shapes, the rotating portion of the index plate 3 has the same structure as that of the second embodiment. Indicator plate 3
Is that at least the surface on which the index 5 is provided has a flat surface shape, and when the support means is installed with the center thereof being coincident with the survey point, the surface portion of the index plate 3 is a line on the survey point. L (see FIG. 5). Note that the index 5 has the same configuration as that of the first embodiment.

The center guide means 4 of this embodiment is provided with guide portions provided on both right and left side portions of the outer peripheral surface of the holder 2 and performs a guide in a horizontal (lateral) direction.
In particular, no guide section is provided in the vertical direction.
The guides in the horizontal direction are vertically projecting pieces 4 respectively.
2 is provided. A gap G for guiding the center portion C from the horizontal direction is formed between the upper and lower projecting pieces 42 so as to coincide with the horizontal line S.
The protruding piece 42 is colored on the inner edge facing the gap G with an appropriate color that stands out from a distance.

Although the center guide means 4 of this embodiment does not have a guide portion in the vertical direction (vertical direction) as described above, it is projected as an index for guiding the vertical direction of the center portion C. Parts (hereinafter referred to as guidance indices) 21 and 2
2 may be used. Since the guide indices 21 and 22 are formed in a cylindrical shape coaxial with the center axis of the pole 11,
Since there is no directivity in the rotation direction, even if the target is shifted in the rotation direction about the center of the pole 11, the centers of the guide indicators 21 and 22 always coincide with the center axis of the pole 11. Thus, in the case of a long distance, even when the index 5 cannot be recognized, if the center of the cylindrical shape of the guide index 21 or 22 is collimated, the center axis of the pole, that is, the target center on the extension of the survey point is obtained. Without deviating from C
Can be collimated.

Next, a third embodiment of the present invention will be described. In the target device for a surveying instrument according to this embodiment, unlike the second embodiment, as shown in FIG.
A relatively large space SP is provided in the upper and lower portions between the holder 2 and the index plate 3. In this embodiment, a triangular index 43 is provided as a vertical guide portion of the center guide means 4 from the holder 2 side toward the space SP as a vertical guide portion. In addition, the guide part in the left-right direction of the center guide means 4 is constituted by a gap G provided between the projecting pieces 42 as in the second embodiment.

[0029]

As described above, according to the present invention, the holder or the index plate is provided with the center guide means as a guide for reading the index, so that the index plate can be easily mounted even from a long distance. Even if you tilt it up, down, left or right,
Since the center of the target can be visually recognized accurately, it is convenient when measuring the distance or angle between the target and the surveying instrument main body, and an accurate measuring operation can be performed.

[Brief description of the drawings]

FIG. 1 is a front view showing a target device for a surveying instrument according to a first embodiment of the present invention.

2A is a cross-sectional view taken along the line II-II in FIG.
(B) is a fracture vertical sectional view.

FIG. 3 shows a target device for a surveying instrument according to a second embodiment of the present invention, wherein (A) is a front view of a main part,
FIG. 3B is a sectional view taken along line III-III in FIG.

FIG. 4 shows a target device for a surveying instrument according to a third embodiment of the present invention, wherein (A) is a front view of a main part,
FIG. 4B is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an explanatory diagram showing a usage state of a target device for a surveying instrument when measuring a distance or an angle to a surveying instrument main body.

FIG. 6 is a front view showing a main part of a conventional target device for a surveying instrument.

FIG. 7 is a front view showing a main part of another target device for a surveying instrument.

8 is a perspective view showing a defect of the target device for a surveying instrument shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support means 11 Pole 2 Holder 23 Horizontal axis 3 Index plate 4 Center guide means 41 Index 42 Projection 43 Index 5 Index C Center part G Gap L Vertical plane S Horizontal line

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI theme coat ゛ (Reference) (72) Inventor Isao Tsuruta 2-5-2 Higashi Oizumi, Nerima-ku, Tokyo Asahi Seimitsu Co., Ltd. (72 Inventor Toshiko Matsuo 2-5-2 Higashi Oizumi, Nerima-ku, Tokyo Asahi Seimitsu Co., Ltd. (72) Inventor Kenichi Nakamura 2-5-2 Higashi-Oizumi, Nerima-ku, Tokyo Asahi Seimitsu Co., Ltd.

Claims (3)

[Claims] 1. A survey point comprising: a holder attached to a support means set at a surveying point; and an index plate having an index serving as a target point collimated from a surveying instrument body and rotatable with respect to the holder. And a surveying instrument target device used when measuring the distance or angle between the surveying instrument body, and a center guide means as a guide when reading the index,
A target device for a surveying instrument, wherein the target device is provided on a vertical plane passing through the center of a support means on the surface of the holder or the indicator plate. 2. The holder and the indicator plate are mounted on the support means in a positional relationship such that at least the tip of the center guide means coincides with a vertical plane passing through the survey point when the support means is installed in accordance with the survey point. The target device for a surveying instrument according to claim 1, wherein the target device is attached. 3. The target device for a surveying instrument according to claim 1, wherein the guide portion in the horizontal direction of the center guide means is provided so as to coincide with a horizontal axis attached to the holder.