Surveying target support

Abstract

To provide a target support capable of positioning a target pole at a survey point and supporting the target pole in a state along the vertical direction with a simple configuration.SOLUTION: The target support 1 supports a target pole 100 to be detected by a surveying device. A target support tool 1 includes a support tool body 2 installed on an installation surface, a pole support member 30 that is attached to the support tool body, has a support hole 32 through which a target pole 100 penetrates, and supports the target pole by the support hole, and a connection member 40 that connects the pole support member to the support tool body so as to be relatively movable in a direction along an installation surface G and holds the pole support member at a predetermined position. The target support tool 1 positions the target pole 100 at a survey point, and supports the target pole in a state along the vertical direction by relatively moving the pole support member 30.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a surveying target support device, and more particularly to a surveying target support device that is installed at a surveying point and supports a target pole that is detected by a surveying instrument. [Background technology]

[0002] Conventionally, a surveying device (total station) is installed at a reference point within a building construction site, a target pole (prism pole) with a target is installed at the surveying point, and the target is detected by the surveying device to measure the position information (distance information, angle information) of the surveying point.

[0003] For example, a target pole is set on the marking line for construction work, and the target is detected by a surveying device to measure the position information of the marking line. Alternatively, a surveying device and a target pole are used to measure the position where the marking line is to be marked on the floor surface of a building, and the marking line is then marked at the measured point. Under these circumstances, in order to reduce measurement errors in surveying work, a surveying target support tool that allows a target pole to be stably installed at a surveying point has been developed (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-114701 [Patent Document 2] Japanese Patent Publication No. 2020-139921 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, in the target support devices such as those disclosed in Patent Documents 1 and 2, there has been a demand for a jig that can position the target pole at the survey point with a simple configuration and can support the target pole in a vertically aligned state. In particular, there has been a demand for a jig that can support a target pole in a vertically aligned state even when the installation surface at the surveying point is inclined relative to the horizontal.

[0006] In addition, with the target support tools described in Patent Documents 1 and 2, when marking a marking line at a surveying point, it is necessary to move the target support tool from the surveying point. Therefore, there has been a demand for a jig that can easily mark a marking line while remaining installed at the surveying point.

[0007] An object of the present invention is to provide a surveying target support tool that has a simple configuration, is capable of positioning a target pole at a surveying point, and is capable of supporting the target pole in a vertically aligned state. Another object of the present invention is to provide a surveying target support tool that can easily mark a marking line at a surveying point while it is still installed at the surveying point. [Means for solving the problem]

[0008] The above problem is solved by the surveying target support of the present invention, which is a surveying target support for supporting a target pole that is installed at a surveying point and has a target to be detected by a surveying instrument, comprising: a support body that is installed on an installation surface of the surveying point; a pole support member that is attached to the support body and has a support hole through which a lower portion of the target pole passes and supports the target pole by means of the support hole; and a connecting member that connects the pole support member to the support body so that it can move relatively in a direction along the installation surface and holds the pole support member in a predetermined position; the surveying target support positioning the target pole at the surveying point and supports the target pole in a state that is aligned vertically by moving the pole support member relatively. With the above configuration, it is possible to realize a survey target support tool with a simple configuration that can position a target pole at a survey point and support the target pole in a vertically aligned state. Specifically, the target support tool can support the target pole in a positioned state using the pole support member. Also, by moving the pole support member relative to the target pole using the connecting member, the target pole can be supported in a vertically aligned state.

[0009] In this case, the support body has an opening located in the horizontal center of the support body and allowing the target pole to pass through in the vertical direction, the pole support member is located opposite the opening of the support body and attached to the top or bottom surface of the support body, and the connecting member connects the pole support member so that it can slide along the top or bottom surface of the support body. With the above configuration, the target support can support the target pole at the center (central part) of the support body, allowing the target pole to be stably installed at the surveying point.

[0010] In this case, the pole support member is a plate-shaped member and has a support hole formed in the horizontal center of the pole support member and a plurality of connecting holes formed at positions surrounding the support hole, and the connecting member connects the pole support member to the support body in the vertical direction so as to sandwich it between itself and the support body, and is formed to be narrower than the connecting hole, and has a connecting bolt that passes through the connecting hole and connects to the support body, and a spring attached to the connecting bolt that urges the pole support member toward the surface of the support body, and the connecting member connects the pole support member so that it can move relatively by changing the relative positions of the connecting bolt and the connecting hole, and the pole support member is held in a predetermined position by the spring. With the above-described configuration, the target support tool can support the target pole in a vertically aligned state by relatively moving the pole support member with a simple configuration that utilizes a connecting bolt and a biasing spring. In particular, even if the installation surface at the surveying point is slightly inclined relative to the horizontal, the target support can support the target pole in a vertically aligned state.

[0011] In this case, the support body has an internal space for accommodating the pole support member, and has the opening formed in the upper wall portion of the support body and a second opening formed in the side wall portion of the support body, the pole support member is arranged opposite the opening of the support body and is attached to the bottom surface of the upper wall portion of the support body by the connecting member, and the surveying target support is configured so that the pole support member accommodated in the internal space can be seen from the outside through the second opening. With the above configuration, the pole support member and the connecting member can be housed in the internal space of the support body. Also, the worker can visually check the pole support member and the target pole supported by the pole support member from the outside through the second opening.

[0012] In this case, the surveying target support device comprises a base jig that is installed on the installation surface, and a support jig that is placed on the upper surface of the base jig and supports the target pole, and the base jig preferably has a base main body portion and a positioning portion that protrudes upward from the upper surface of the base main body portion and engages with the lower end portion of the support jig. The above configuration makes it possible to realize a simple target support consisting of two parts: a base jig and a support jig.

[0013] In this case, the support jig comprises a support main body, a pole support member attached to the support main body and having the support hole, and a connecting member connecting the pole support member to the support main body, and the base jig has a central hole formed in the center of the base main body in the vertical direction and penetrating it, supporting the tip of the target pole, and a guide hole extending horizontally from the central hole for marking a marking line, and the support hole and the central hole are arranged in overlapping positions when viewed from above, and the guide hole is exposed to the outside when the support jig is removed from the base jig. With the above configuration, by removing the support jig from the base jig, it is possible to easily mark the marking line using the guide holes while the jig remains installed at the surveying point.

[0014] In this case, the base jig has a protrusion that protrudes horizontally outward from the outer edge of the base main body, and the protrusion is provided at a position on the outer edge of the base main body that is on an extension of the guide hole, and has a second guide hole that is formed along the extension of the guide hole and is used to align with the marking line. With the above configuration, the second guide holes can be used to accurately install the target support along a marking line that has been pre-marked on the floor. Furthermore, by using the second guide holes, it is also possible to easily mark a new marking line at the surveying point. When using the second guide holes, it is not necessary to remove the support jig from the base jig. [Effects of the Invention]

[0015] According to the surveying target support tool of the present invention, it is possible to position the target pole at the surveying point with a simple configuration and to support the target pole in a state aligned in the vertical direction. Furthermore, it is possible to easily mark the surveying point with the device still installed at the surveying point. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a configuration diagram of a surveying system according to an embodiment of the present invention, illustrating the operation of surveying a survey point (marked point). FIG. [Figure 2] FIG. 1 is a configuration diagram of a surveying system, illustrating the work of marking a marking line at a surveying point. [Figure 3] FIG. 2 is a perspective view of a target support and a target pole. [Figure 4] FIG. 2 is an exploded perspective view of the target support. [Figure 5] 4 is a VV cross-sectional view of FIG. 3, showing a state where the device is installed on a horizontal surface. FIG. [Figure 6] 6 is an enlarged view of a main part of FIG. 5, showing a state in which the pole support member is in a reference position. FIG. [Figure 7] FIG. 2 is a cross-sectional view of the target support, showing the state where it is installed on an inclined surface. [Figure 8] 8 is an enlarged view of a main part of FIG. 7, showing a state in which the pole support member has moved relatively. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to a "survey target support tool" that can position a target pole at a surveying point and support the target pole in a vertically aligned state. It also relates to a "surveying system" that includes a surveying target support.

[0018] <Overall configuration of the surveying system> As shown in Figures 1 and 2, the surveying system S of this embodiment is mainly composed of a target support 1 installed at a surveying point within a building, a target pole 100 supported by the target support 1, a surveying device 200 installed at a reference point within the building to detect the target pole 100 (target 103) and measure the position information of the surveying point, and an operator terminal 300 operated by an operator and connected to the surveying device 200 so as to be able to communicate with it. The surveying system S can mainly perform the surveying work (first surveying work) shown in Fig. 1 and the surveying work (second surveying work) shown in Fig. 2. Specifically, the surveying work is as follows.

[0019] In the surveying system S, as shown in Fig. 1, a target support 1 is installed on a marking line L drawn on an installation surface G inside a building. Then, a target pole 100 is installed on the target support 1, and a target 103 is detected by a surveying device 200, thereby measuring the position information of the marking line L (position information of the surveying point). By using the target support tool 1, it is possible to position the target pole 100 at the surveying point and to support the target pole 100 in a state aligned in the vertical direction. In particular, as shown in Figures 5 and 7, the target support 1 can be used to support the target pole 100 in a vertical direction, not only when the installation surface G is flat, but also when the installation surface G is inclined.

[0020] In the surveying system S, as shown in FIG. 2, a target support 1 is installed on an installation surface G within a building. A target pole 100 is then installed on the target support 1, and the position information of the target pole 100 is measured using a surveying device 200. An operator uses an operator terminal 300 to compare the position information measured by the surveying device 200 with information on the position where the marking line L is to be marked. The operator then moves the positions of the target support 1 and the target pole 100, and installs the target support 1 (target pole 100) at the position where the marking line L is to be marked (the marking position). The support jig 10 and the target pole 100 are then removed upward, leaving the base jig 50 at the marking position. The operator then uses the guide hole 55 and second guide hole 57 of the base jig 50 to mark the marking line at the marking position. In this way, by using the target support 1, it is possible to easily mark a marking line along the guide hole 55 (second guide hole 57) while the base jig 50 remains installed at the surveying point (marking position).

[0021] "Marking out work" refers to the work of marking reference lines (marking out lines) and reference marks (marking out marks) on floors, walls, ceilings, etc., that indicate the reference positions for various construction work at a building construction site. Specifically, this includes marking out foundations, marking out the framework, marking out finishing, etc.

[0022] Below, the target pole 100, the surveying instrument 200, and the operator terminal 300 will be explained first, and then the target support tool 1 will be explained in detail.

[0023] As shown in FIGS. 1 to 5, the target pole 100 is a long object to be detected having a target 103, and is, for example, a full-circle target pole (full-circle prism pole) that is compatible with automatic tracking. The target pole 100 comprises a vertically long pole 101, a holder 102 attached to the upper part of the pole 101, and a target 103 and a bubble tube 104 supported by the holder 102. As shown in FIG. 5, the lower portion (bottom end portion) of the pole 101 serves as a ferrule 101a, which comes into contact with the surveying point.

[0024] The target 103 is a 360-degree reflecting prism that is the object to be detected by the surveying instrument 200 . The bubble tube 104 is a level that uses an air bubble, and moves the air bubble inside the bubble tube to determine the horizontal plane of the target pole 100, in other words, the vertical position of the target pole 100. The target pole 100 is attached to the target support 1 from above, and is installed at a survey point on the installation surface G while being supported by the target support 1.

[0025] As shown in FIGS. 1 and 2, the surveying device 200 is an automatic tracking total station, and is installed at a reference point inside a building. The surveying device 200 detects the target pole 100 supported by the target support 1, and measures the position information of the target 103 based on the detection results. The surveying device 200 comprises a device main body 201 that measures the distance and direction to the target 103 by emitting laser light while continuously changing the irradiation direction and receiving reflected light from the target 103, and a control controller 202 that is attached inside the device main body 201. The controller 202 is a computer equipped with a CPU (processor), a storage device, and a communication interface. The surveying device 200 measures the position information of the target pole 100 inside the building, and generates “survey data.” Then, the “survey data” is transmitted to the operator terminal 300.

[0026] As shown in FIGS. 1 and 2, the operator terminal 300 is operated by an operator and is a computer equipped with a CPU (processor), a storage device, and a communication interface. The operator terminal 300 may be operated inside or outside the building. Functionally, the operator terminal 300 has as its main components a memory unit that stores "design drawing data" including building design information, a communication unit that sends and receives various data to and from the surveying device 200, and a design drawing generation unit that generates "design drawing data" based on user input. These are composed of a CPU (processor), ROM, RAM, HDD, communication interface, various programs, etc.

[0027] 1, the operator terminal 300 acquires "survey data" from the surveying device 200. Then, based on the position information of the target pole 100 included in the "survey data" and the design information of the building included in the "design drawing data", the operator terminal 300 generates and stores position information of a known point (here, the center point of the marking line) in the coordinate system within the building. Furthermore, the operator terminal 300 acquires "survey data" from the surveying device 200 as the second surveying operation shown in Fig. 2. Then, it determines whether the position information of the target pole 100 contained in the "survey data" matches the position information of the marking line of the building contained in the "design drawing data". If the operator terminal 300 determines that the two match, the worker marks the marking line at the installation position of the target pole 100.

[0028] <Details of the surveying target support> As shown in FIGS. 1 to 8, the target support 1 is a jig that is installed at a surveying point and supports a target pole 100 that is detected by a surveying instrument 200. The target support 1 is a jig that combines, for example, a "pole support function" that supports the target pole 100 in a vertically aligned state, and a "guide function" that marks a marking line on the installation surface G. In other words, the target support 1 can be used as a support jig for surveying known points and for marking a marking line.

[0029] The target support 1 comprises a support jig 10 that supports the target pole 100, and a base jig 50 that detachably supports the support jig 10 from below. In other words, the target support 1 comprises two parts that can be separated in the vertical direction. The support jig 10 has a support main body 20, a pole support member 30 attached to the support main body 20 and supporting the target pole 100, and a connecting member 40 connecting the pole support member 30 to the support main body 20. The base jig 50 has a base main body portion 51 , a positioning portion 52 , a central recess portion 53 , a central hole 54 , a guide hole 55 , a protrusion portion 56 , and a second guide hole 57 . The support body 2 that is the main body of the target support 1 corresponds to the support body portion 20 and the base body portion 51.

[0030] The support body 20 has an internal space for accommodating the pole support member 30 and the connecting member 40, and has, for example, a box shape facing downward. The support main body 20 has an upper wall 21, a plurality of side wall sections 22 extending downward from all four sides of the upper wall section 21, a rectangular opening 23 formed in the center of the upper wall section 21, a plurality of bolt assembly holes 24 formed surrounding the opening 23, and a second rectangular opening 25 formed in the lower portion of the side wall section 22.

[0031] The opening 23 is formed in the horizontal center of the upper wall portion 21, and is an opening portion through which the target pole 100 (ferrule portion 101a) passes in the vertical direction. The bolt assembly holes 24 are threaded holes that are provided at the four corners of the upper wall portion 21 and penetrate in the vertical direction. As shown in Fig. 6, a connecting member 40 (connecting bolt 41) is fastened to the bolt assembly holes 24 so as to sandwich the plate-shaped pole support member 30 therebetween. The second opening 25 is formed in the center in the width direction of the side wall portion 22. Through the second opening 25, the pole support member 30 and the target pole 100 (ferrule portion 101a) housed inside the support body portion 20 can be seen from the outside.

[0032] As shown in FIGS. 4 to 6, the pole support member 30 is attached to the bottom surface of the support body 20 (upper wall portion 21) by a connecting member 40. The pole support member 30 is arranged opposite the opening 23 of the support main body 20 and has a plate member 31 placed on the bottom surface of the support main body 20, a support hole 32 formed in the center of the plate member 31 and allowing the lower part of the target pole 100 to pass through, and a plurality of connecting holes 33 formed surrounding the support hole 32.

[0033] As shown in FIGS. 4 and 5, the support hole 32 is a substantially circular through-hole formed in the horizontal center of the plate member 31, and is a support portion that supports the target pole 100. The support hole 32 is formed to be slightly wider than the ferrule 101a of the target pole 100. For example, the diameter of the support hole 32 is about 9.1 mm, and the diameter of the ferrule 101a is about 9 mm.

[0034] As shown in FIG. 6, the connecting holes 33 are provided at the four corners of the plate member 31, and are elongated holes that penetrate the plate member 31 in the vertical direction and extend longitudinally in the width direction of the plate member 31. The plate-shaped pole support member 30 is attached to the bottom surface of the support main body 20 by fastening the connecting member 40 (connecting bolt 41) with the bolt assembly hole 24 and the connecting hole 33 communicating in the vertical direction. The pole support member 30 is attached by a connecting member 40 so as to be movable relative to the support body 20 in directions along the installation surface G (two-dimensional directions).

[0035] As shown in FIGS. 5 and 6, the connecting member 40 connects the pole support member 30 along the bottom surface of the support body 20 so that the pole support member 30 can slide and move, and holds the pole support member 30 in a predetermined position. Specifically, the connecting member 40 connects the pole support member 30 to the support body 20 so as to sandwich the pole support member 30 therebetween in the vertical direction.

[0036] The connecting member 40 is formed to be narrower than the connecting hole 33, and has a connecting bolt 41 that passes through the connecting hole 33 and is connected to the support main body 20 (bolt assembly hole 24). The connecting bolts 41 are, for example, stepped bolts, and are arranged at the four corners of the plate-shaped pole support member 30. In addition, the connecting members 40 are each assembled to the connecting bolts 41 and have a biasing spring 42 (biasing member) that biases the pole support member 30 toward the bottom surface of the support main body 20, and a washer 43 (intermediate member) that is biased by the biasing spring 42 and abuts against the pole support member 30.

[0037] 5 to 8, the connecting member 40 connects the pole support member 30 so as to be relatively movable by changing the relative positions of the connecting bolt 41 and the connecting hole 33. The pole support member 30 is held in a predetermined position by the biasing spring 42 and the washer 43. More specifically, the worker can move the pole support member 30 relatively against the biasing force of the biasing spring 42. At this time, the worker can move the pole support member 30 by gripping the target pole 100 supported by the pole support member 30 and moving the target pole 100. When the worker releases the target pole 100 at a predetermined position, the pole support member 30 and the target pole 100 are supported at the predetermined position by the biasing force of the biasing spring 42. In other words, the target pole 100 stops at the predetermined position.

[0038] With the above configuration, as shown in FIGS. 5 and 6, the target support 1 can position the target pole 100 at the surveying point and support the target pole 100 in a state aligned in the vertical direction. 5 is a diagram showing a state in which the target support 1 and the target pole 100 are installed on a horizontal plane, and the pole support member 30 is in the "reference position."

[0039] 7 and 8, even when the target support 1 and the target pole 100 are installed on an inclined surface, the target support 1 can erect the target pole 100 by sliding the pole support member 30, and support the target pole 100 in a vertical position. The target pole 100 is then supported in a vertical position by the biasing force of the biasing spring 42. Generally, the target pole 100 has an eccentric structure that tilts in one horizontal direction. Therefore, by utilizing the characteristics of the target pole 100 and arranging the target pole 100 so that it tilts toward the higher side of the inclined surface, for example, the target support 1 (support hole 32) can more stably support the target pole 100 in a vertical position.

[0040] The base jig 50 is a base member that is placed on an installation surface G, as shown in FIGS. The base jig 50 has a rectangular base main body portion 51, a positioning portion 52 that protrudes upward from the top surface of the base main body portion 51 and engages with the lower end portion of the support jig 10, and a rectangular central recess portion 53 that is formed in the center of the base main body portion 51 and is recessed downward. A central hole 54 and a guide hole 55 are formed on the upper surface of the central recess 53. A plurality of protrusions 56 and second guide holes 57 are formed on the outer edge of the base main body 51.

[0041] The positioning portion 52 is a protruding portion that protrudes from the base main body portion 51 in a frame shape. The positioning portion 52 engages with the corner of the lower end of the support body 20 (side wall portion 22 ) and positions the support jig 10 relative to the base jig 50 .

[0042] The center hole 54 is a circular hole formed in the center of the base body 51 so as to penetrate in the vertical direction, and supports the tip of the target pole 100 (ferrule 101a). 5, the center hole 54 and the support hole 32 are arranged at positions that overlap when viewed from above. The center hole 54 and the support hole 32 support the target pole 100 in a state that is aligned in the vertical direction.

[0043] Guide hole 55 is a through hole extending horizontally in a cross shape from center hole 54, and is a hole for marking a marking line. For example, an operator can mark a marking line by running a marking pen along guide hole 55. The guide holes 55 are exposed to the outside when the support jig 10 is removed from the base jig 50. This allows the support jig 10 to be removed from the base jig 50, making it possible to easily mark the marking lines using the guide holes 55.

[0044] The protrusion 56 is a portion that protrudes outward in the horizontal direction from the outer edge of the base main body 51 . More specifically, the protrusions 56 are provided at the center of each side of the base main body 51, and protrude outward from the base main body 51. The protrusions 56 are each disposed on an extension of the guide holes 55. The second guide hole 57 is provided in the center of the protrusion 56 in the width direction, and is formed along an extension of the guide hole 55 . The second guide hole 57 is a guide for aligning with the marking line, and unlike the guide hole 55, is provided in a state where it is always exposed to the outside.

[0045] By using the second guide holes 57, the target support 1 can be installed with high precision along the marking line L that is marked in advance on the installation surface G, as shown in FIG. 2, by using the second guide holes 57, it is also possible to easily mark new marking lines on the installation surface G. As described above, when using the second guide holes 57, it is not necessary to remove the support jig 10 from the base jig 50.

[0046] By using the target support 1, it is possible to position the target pole 100 at the surveying point with a simple configuration and to support the target pole 100 in a state aligned with the vertical direction. Also, with the target support 1 (base jig 50) left installed at the surveying point, it is possible to easily mark a marking line at the surveying point.

[0047] <Other embodiments> In the above embodiment, as shown in FIG. 4, the target support 1 is configured to be separable into the support jig 10 and the base jig 50, but this is not particularly limited. For example, the target support 1 may be an integral jig that cannot be separated into multiple parts.

[0048] In the above embodiment, as shown in FIG. 5, the pole support member 30 is attached to the bottom surface of the support body 2 (support body portion 20), but this is not particularly limited, and it may also be attached to the top surface of the support body 2.

[0049] In the above embodiment, as shown in FIG. 5, the connecting member 40 slidably connects the pole support member 30 to the support tool main body 2 (support main body portion 20), and holds the pole support member 30 at a predetermined position. Here, the connecting member 40 achieves sliding movement and locking by the connecting bolt 41 and the biasing spring 42, but this configuration is not limited to this. That is, the sliding mechanism and the locking mechanism may be realized by a slide rail and a locking member, etc.

[0050] In the above embodiment, the surveying system according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0051] S Surveying System 1 Target support (survey target support) 2 Support body 10 Support jig 20 Support body 21 Upper wall 22 Side wall 23 Opening 24 Bolt assembly holes (bolt assembly part) 25 Second opening 30 Pole support member 31 Plate members 32 Support hole 33 Connection hole 40 Connecting member 41 Connecting bolt (step bolt) 42 biasing spring (biasing member) 43 Washer (intermediate part) 50 Base jig 51 Base body 52 Positioning part 53 Central recess 54 Center hole 55 Guide hole 56 Protrusion 57 Second guide hole 100 Target Pole (Prism Pole) 101 Paul 101a Ferrule 102 Holder 103 Target (Prism) 104 Bubble tube 200 Surveying equipment (total station) 201 Device body 202 Controller 300 Operator Terminal G Installation surface L Marking line

Claims

1. A surveying target support device for supporting a target pole having a target to be installed at a surveying point and detected by a surveying instrument, comprising: a support body to be installed on the installation surface of the surveying point; a pole support member attached to the support body, having a support hole through which a lower portion of the target pole passes, and supporting the target pole via the support hole; a connecting member that connects the pole support member to the support device main body so that the pole support member can move relatively in a direction along the installation surface and holds the pole support member at a predetermined position, The surveying target support device is characterized in that it positions the target pole at a surveying point and supports the target pole in a vertical direction by moving the pole support member relatively.

2. the support body has an opening provided in the horizontal center of the support body and allowing the target pole to pass through in the vertical direction, The pole support member is provided opposite the opening of the support body and attached to the top surface or bottom surface of the support body, 2. The surveying target support tool according to claim 1, wherein the connecting member connects the pole support member so as to be slidable along the top or bottom surface of the support body.

3. The pole support member is a plate-shaped member, and has the support hole formed in the horizontal center of the pole support member and a plurality of connecting holes formed at positions surrounding the support hole, The connecting member is The pole support member is connected to the support body so as to be sandwiched between the pole support member and the support body in the vertical direction, a connecting bolt formed to be narrower than the connecting hole and passed through the connecting hole to be connected to the support body; a biasing spring attached to the connecting bolt and biasing the pole support member toward the surface of the support body; A surveying target support device as described in claim 1 or 2, characterized in that the connecting member connects the pole support member so that it can move relative to the connecting bolt by changing the relative positions of the connecting bolt and the connecting hole, and holds the pole support member in a predetermined position by the biasing spring.

4. The support body is an internal space for accommodating the pole support member; The opening is formed in an upper wall portion of the support body, and a second opening is formed in a side wall portion of the support body, the pole support member is provided opposite the opening of the support body and is attached to the bottom surface of the upper wall portion of the support body by the connecting member; 3. The surveying target support tool according to claim 2, wherein the surveying target support tool is configured so that the pole support member housed in the internal space can be seen from the outside through the second opening.

5. the surveying target support tool comprises a base jig that is installed on the installation surface, and a support jig that is placed on an upper surface of the base jig and supports the target pole; A surveying target support device as described in claim 1 or 2, characterized in that the base jig has a base main body portion and a positioning portion that protrudes upward from the upper surface of the base main body portion and engages with the lower end portion of the support jig.

6. The support jig comprises a support body, the pole support member attached to the support body and having the support hole, and the connecting member connecting the pole support member to the support body, The base jig has a central hole formed in the center of the base body portion so as to penetrate in the vertical direction and support the tip of the target pole, and a guide hole extending horizontally from the central hole and for marking a marking line, the support hole and the center hole are arranged at positions that overlap each other in a top view, 6. The surveying target support tool according to claim 5, wherein the guide hole is exposed to the outside when the support jig is detached from the base jig.

7. the base jig has a protrusion that protrudes outward in a horizontal direction from an outer edge of the base main body, The protrusion is The guide hole is provided on the outer edge of the base body at a position on an extension line of the guide hole.

7. A surveying target support tool according to claim 6, further comprising a second guide hole formed along an extension of said guide hole for aligning with a marking line.

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