KR102069109B1 - Apparatus for preventing shock of staff geodetic surveying - Google Patents

Abstract

The present invention relates to a tangent sight for large area surveying. More specifically, the present invention relates to a vibration attenuation protecting apparatus of a tangent sight for large area surveying, comprising: a tangent sight unit formed in the shape of a bar that can stand vertically and having scales formed in the longitudinal direction; a height adjusting unit coupled to a lower part of the tangent sight unit and able to be stretched up and down to adjust the height of the tangent sight unit; a buffer unit coupled to a lower part of the height adjusting unit to mitigate vibrations applied from the ground surface; and a grounding unit coupled to a lower part of the buffer unit and protruding in a pointed shape. Therefore, the tangent sight for large area surveying can dampen vibrations and shocks generated from the surrounding ground surface.

Description

Vibration damping protection device for geodetic surveying {APPARATUS FOR PREVENTING SHOCK OF STAFF GEODETIC SURVEYING}

The present invention relates to a surface used for geodetic surveying operation, and more particularly, to a vibration damping protection device for geodetic surveying that can protect the surface from external vibration or shock generated around the surface during geodetic surveying. .

In general, geodetic surveying should be done for various civil and architectural designs. Geodetic surveying refers to all activities that measure horizontal distance, elevation and direction, determine the position between each measuring point, display it in figures or figures, and stake out in the field.

Among these geodetic surveys, level surveying is a survey of the height difference between two points using surveying devices such as top level, leveler, total station, etc. The accuracy is 5mm * S / 2 for level 2 surveying (where, S is a one-way distance, and the unit is km), so detailed surveying is required.

1 is a view for explaining a method for surveying the level using a conventional topographic and surveying equipment.

In the first step, the surface water level establishes the surface 1 at the ground reference point a0 where the altitude is known, and the number of machines is adjusted to the level at the first observation point b1 separated by a certain distance. Read the scale of the scale (1) with the instrument (2).

In the second step, the surface water moves to the first point a1 to establish the surface 1, and the number of machines reverses the direction of the survey instrument 2 at the observation point b1, and then through the survey instrument 2 Read the scale scale of the point. Here, the altitude of the first point is obtained from the difference between the scales read from the ground reference point a0 and the first point a1 and the altitude of the ground reference point.

In the third step, the machine number moves to the second observation point b2 behind the first point a1, the number of turns of the scale 1 in place (the first point), and the scale 1 is surveyed. The instrument 2 reads the scale reading of the first point a1 from the second observation point b2 to the survey instrument.

In the fourth step, the surface water moves to the second point a2 to establish the surface 1, and the mechanical number reads the surface scale of the second point a2 at the second observation point b2. Here, the altitude of the second point is obtained from the difference in scale between the first point a1 and the second point a2 read at the second observation point b2.

In this way, while the top and bottom of the survey instrument 1 and 2 continue to be moved, the scale of each point and the direction of the survey instrument at each observation point are changed to read the scale to obtain the altitude of each point to the target point.

However, in conventional geodetic surveying, the scales are shaken in the process of reading the scales by the leveler, which is a certain distance away, when the surface is set on the ground during geodetic surveying. There is a problem that can not be made, thereby causing a measurement error.

In addition, the conventional top scale is configured to stretch the upper unit bar and the lower unit bar in the self-adjustable length, but when there is an obstacle such as a bush on the ground near the top, there is a problem that the top surface is difficult to function properly.

The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a vibration damping protection device for geodetic surveying that can attenuate vibrations or shocks generated from surrounding ground by using a buffer part.

In addition, the present invention is easy to adjust the height can give a convenience in geodetic surveying work, it is another object to provide a vibration damping protection device for the geodetic surveying surface to be easily fixed to the ground by using a ground.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description of the present invention. .

Configuration of the present invention for achieving the above object, the scale is formed along the longitudinal direction in the form of a bar that can stand vertically; It is coupled to the lower part of the top surface portion is stretchable up and down to adjust the height of the top surface portion; A shock absorbing portion coupled to a lower portion of the height adjusting portion to mitigate vibrations applied from the ground; And a ground portion coupled to the lower portion of the buffer portion and protruding from a pointed shape; Characterized in that it comprises a.

In the vibration damping protection device for the geodetic surveying surface according to an embodiment of the present invention, the top surface portion, the lower unit bar having a graduated and open top and closed bottom surface; And the upper side unit bar is formed in the shape of a rectangular bar with all the front closed; It is preferable that the upper unit bar is inserted into the lower unit bar is movable up and down.

In the vibration damping protection device for the geodetic surveying surface according to an embodiment of the present invention, the height adjustment unit, the plate-like upper coupling piece is coupled to the lower unit bar; An upper control bar coupled vertically to a lower portion of the upper coupling piece and having a plurality of height determining grooves formed at predetermined intervals along its length direction; A lower adjustment bar coupled to a lower portion of the upper adjustment bar and having a height adjusting hole penetrating therein to be inserted to move the upper control bar up and down along its length direction; Plate-like lower coupling piece coupled to the lower portion of the lower adjustment bar; And a height fixing part coupled to the upper side of the lower adjusting bar and capable of fixing the height adjusting upper control bar; It is preferable to include.

In the vibration damping protection device for the geodetic surveying surface according to an embodiment of the present invention, the height fixing portion, the rotating portion mounted to be rotatable to the height extension portion protruding to the upper side of the lower adjustment bar; An elastic extension part extending outwardly of the rotation part and having a plurality of cutout parts having elastic restoring force; And a 'C' shaped locking portion coupled to the top surface of the lower adjustment bar and disposed to cover the outer circumference of the height adjustment hole; It includes, the engaging portion, the contact end is formed at one end of the engaging portion in contact with the end of the elastic extension portion is disposed in a position not exceeding the region where the plurality of height determining groove is disposed; And a prevention end portion formed at the other end of the locking portion and disposed in contact with the side surface of the elastic extension portion and disposed at a position beyond the area where the height determining groove is disposed. It includes, The elastic extension portion is rotated together in accordance with the rotation of the rotating portion, the end is retracted while contacting the contact end, stretched over the contact end is inserted into the height-determining groove, blocked by the prevention end no longer rotated It is desirable not to.

In the vibration damping protection device for the geodetic surveying surface according to an embodiment of the present invention, the buffer unit is mounted to the lower portion of the lower coupling piece is coupled to the lower coupling piece via a rotating bearing, the lower support piece is a relatively low rotation support; A cushioning body portion coupled to a lower portion of the buffer support portion and having a rectangular parallelepiped shape in which a buffer through hole is formed; A buffer cover portion coupled to cover the lower surface of the buffer body portion and having a buffer head hole formed therein; And a buffer bolt which is fastened to the buffer coupling hole formed through the buffer head hole and the buffer through hole, and connected to the buffer cover portion, the buffer body portion, and the buffer support portion. It is preferable to include.

In the vibration damping protection device for the geodetic surveying surface according to an embodiment of the present invention, the buffer bolt, the bolt screw portion having the same diameter as the buffer coupling hole formed with a screw thread on the outer peripheral surface; A bolt through portion having the same diameter as the buffer through hole and having no thread formed on its outer circumferential surface; And a bolt head portion having the same diameter as that of the buffer head hole and having no thread formed on the outer circumferential surface thereof. It is preferable to include.

In the vibration damping protection device for the geodetic surveying surface according to an embodiment of the present invention, the ground portion is coupled to face each other with a buffer head hole in the lower portion of the buffer cover portion, the insertion space between the pair of ground portion It is preferable that this be formed.

The present invention having the configuration as described above, by using a shock absorber can attenuate the vibration or shock transmitted from the ground to the surface to the surface has the effect that the accuracy of the geodetic surveying operation is significantly improved.

In addition, the present invention can change the height of the surface of the surface using the height adjustment unit, there is an obstacle around the operator can easily read the scale of the surface, there is an effect that the convenience of geodetic surveying work is significantly improved.

Furthermore, the present invention can firmly set the top surface vertically to the ground by using the grounding part, so that the top surface can be prevented from shaking during the geodetic surveying process, and the top surface can be easily set in accordance with the state of the ground using the grounding aid. There is an advantage.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a method of surveying a level using conventional topography and surveying equipment.
2 is a view showing the overall appearance of the vibration damping protection device for geodetic surveying according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing a view of the upper control bar, the lower control bar and the height fixing in accordance with an embodiment of the present invention.
4 is a view showing an exploded state of each component of the buffer unit according to an embodiment of the present invention.
5 is a view showing a state of the grounding auxiliary unit according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

In addition, the terms or words used in the specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly interpret the concept of terms in order to best explain their own inventions. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can be defined.

2 is a view showing the overall appearance of the vibration damping protection device for geodetic surveying according to an embodiment of the present invention.

As shown, the vibration damping protection device for geodetic surveying according to the present invention comprises a top 100, height adjustment 200, the buffer 500 and the ground 550.

The top portion 100 includes two or more unit bars (110. 120) are coupled to be adjustable in length in a stretchable manner. The lower unit bar 120 is formed thicker than the upper unit bar 110 positioned above. Here, the lower unit bar 120 and the upper unit bar 110 may be configured as two or more as necessary, respectively.

The upper unit bar 110 and the lower unit bar 120 is engraved with a scale so that the number of machines can be read as a level. The lower unit bar 120 is formed in an elongated rectangular barrel shape having an open top and a closed lower end, and the upper unit bar 110 is formed in a rectangular bar shape in which all of its front surfaces are closed.

The upper unit bar 110 is inserted into the lower unit bar 120 is configured to be adjustable in the slide stretch type. Here, it is obvious that the lower unit bar 120 and the upper unit bar 110 may have a cylindrical or polygonal shape.

Figure 3 is a cross-sectional view showing a view of the upper control bar, the lower control bar and the height fixing in accordance with an embodiment of the present invention.

As shown in FIG. 2, the plate-shaped upper coupling piece 300 is coupled to the lower portion of the lower unit bar 120, and the plate-shaped lower coupling piece 310 is coupled to the upper portion of the buffer unit 500. The upper coupling piece 300 and the lower coupling piece 310 are spaced apart vertically.

The upper control bar 410 is coupled to the lower portion of the upper coupling piece 300, the lower control bar 420 is coupled to the upper portion of the lower coupling piece 310. A plurality of height determining grooves 411 are formed in the upper adjustment bar 410 to have a predetermined distance along its longitudinal direction, and the height adjustment holes 421 are long in the lower adjustment bar 420 along its length direction. Is formed.

The upper adjustment bar 410 is inserted into the height adjustment hole 421 formed in the lower adjustment bar 420 can be moved up and down, thus the overall height of the top surface portion 100 coupled to the upper can be adjusted. have.

The upper side of the lower adjustment bar 420 is mounted with a height fixing part 400 that can fix the height adjustment bar 410 is adjusted. The user can fix the upper adjustment bar 410 to the desired position by using the height and fixing unit 400.

Specifically, the height fixing part 400 is a rotating part 440, which is mounted to be rotatable in the height extending part (see Fig. 2, 430) protruding and extending to the upper side of the lower adjustment bar 420, extends to the outside of the rotating part. And a plurality of cutouts 451 are formed to be coupled to the top surfaces of the elastic extension 450 and the lower adjustment bar 420 having elastic restoring force and disposed to wrap the outer circumference of the height adjustment hole 421. C 'shaped engaging portion 460 is included.

Since the plurality of cutouts 451 are disposed at predetermined intervals in the middle of the elastic extension part 450, the elastic extension part 450 is retracted in the direction of the rotating part 440 or opposite to the rotating part 440. Can be unfolded in the direction.

A contact end 461 is formed at one end of the engaging portion 460, and a prevention end 462 is formed at the other end. When the height of the upper adjustment bar 410 is determined, the elastic extension portion 450 is positioned between the contact end portion 461 and the prevention end portion 462 and inserted into the height determining groove 411, and the upper adjustment bar 410. The elastic extension portion 450 is positioned outside the contact end portion 461 as shown in FIG.

The contact end portion 461 is in contact with the end of the elastic extension portion 450 in accordance with the rotation of the elastic extension portion 450, the elastic extension portion 450 may selectively ride over. The elastic restoring force of the elastic extension part 450 is such that the elastic extension part 450 can cross the contact end 461 when the rotation part 440 is rotated by inserting a tool into a tool groove formed in the rotation part 440. Is determined.

To this end, the contact end 461 is formed in a round shape similar to the end of the elastic extension portion 450, and is disposed at a position not exceeding the region where the height determining groove 411 is disposed.

When the user rotates the rotating part 440 clockwise, the elastic extension portion 450 is in contact with the contact end portion 461, and in this state to apply more force to rotate the rotating part 440 to the incision portion 451 As a result, the elastic extension part 450 is retracted, and is carried over the contact end 461 and inserted into the height determining groove 411.

If the elastic extension portion 450 is beyond the contact end portion 461, if the user further rotates the rotating portion 440, the side portion of the elastic extension portion 450 is blocked by contact with the prevention end portion 462, Accordingly, excessive rotation of the elastic extension part 450 is prevented.

The prevention end portion 462 is in contact with the side surface of the elastic extension portion 450, and is disposed at a position beyond the area where the height determining groove 411 is disposed. That is, if the contact end 461 is disposed in a portion which does not invade the area where the height determining groove 411 is disposed, the prevention end 462 is disposed on the area in which the height determining groove 411 is disposed.

The contact end portion 461 is in contact with the end of the elastic extension portion 450, while the prevention end portion 462 is formed to be in contact with the side of the elastic extension portion 450, the elastic extension portion 450 is the prevention end portion It is impossible to go beyond 462.

If the user wants to adjust the height of the upper adjustment bar 410 again, by rotating the rotating part 440 counterclockwise to the contrary to the above process, the elastic extension portion 450 contracts and the contact end portion 461 again. Riding over and away from the height determination groove (411).

As such, the present invention has the advantage that the height can be adjusted very easily because the upper control bar 410 can adjust the degree of insertion into the lower control bar 420 only by rotating the rotating part 440.

4 is an exploded view of each component of the shock absorbing unit according to the exemplary embodiment of the present invention.

As shown in FIG. 2, a lower portion of the lower coupling piece 310 is mounted with a cylindrical buffer support 510. Rotating bearing 512 is coupled to the outside of the buffer support 510, the buffer support 510 is coupled to the lower coupling piece 310 via the rotation bearing 512.

That is, the lower coupling piece 310 can be rotated relative to the buffer support 510 due to the rotation bearing 512, so that the operator can freely rotate the top surface 100 in the desired direction during geodetic surveying work. have.

As shown, the buffer 500 is coupled to the lower end of the buffer support 510, and comprises a buffer body 520, the buffer cover 530 and the buffer bolt 540. The ground portion 550 is coupled to the lower portion of the buffer portion 500.

A buffer coupling hole 511 is formed in the lower center of the buffer support part 510 along its longitudinal direction. A plurality of threads are formed in the inner diameter of the buffer coupling hole 511 along the longitudinal direction.

The buffer body 520 is coupled to the lower portion of the buffer support 510, the buffer through-hole 521 is formed in the center. The inner diameter of the buffer through hole 521 is different from the buffer coupling hole 511 in that no thread is formed.

The buffer body 520 is formed in a rectangular parallelepiped shape, and is made of a material having elasticity to prevent the shock or vibration applied to the top surface 100 from the ground to be transmitted to the top.

For example, the buffer body 520 is preferably made of a thermoplastic elastomer. Thermoplastic elastomers have the function of rubber at room temperature but are plasticized at high temperatures to enable various molding processes.

The buffer cover portion 530 is coupled to cover the lower surface of the buffer body 520, the buffer head hole 531 is formed in the center. Similarly to the buffer through-hole 521, no thread is formed in the inner diameter of the buffer head hole 531.

The buffer cover 530 is formed to have a cross-section of the 'c' shape corresponding to the shape of the lower surface of the buffer body 520. The shock absorbing cover part 530 prevents the shock absorbing body part 520 from being easily contacted with the outside.

In other words, the buffer cover 530 is made of a material having a relatively high hardness than the buffer body 520. The buffer cover part 530 may be made of various materials such as plastic or metal of high hardness.

As described above, the buffer body 520 buffers external vibrations, and if the hardness is too high, the shock absorbing unit 520 may hardly perform the shock absorbing function. . That is, it is very difficult to satisfy both performances at once.

In the present invention, by improving the problem, the buffer body 520 is made of a material that is as soft and elastic as possible to maximize the buffer function, the buffer cover 530 is made of a material of high hardness to prevent wear, Both functions can be satisfied at the same time.

The buffer bolt 540 is fastened to the buffer coupling hole 511 through the buffer head hole 531 and the buffer through hole 521, the buffer cover portion 530, the buffer body portion 520 and the buffer support portion 510 )) Into one.

Specifically, the buffer bolt 540 has the same diameter as the buffer coupling hole 511 and has the same diameter as the bolt screw portion 541, the threaded through-hole 521, the thread formed on the outer peripheral surface and the thread is not formed on the outer peripheral surface It includes a bolt head portion 543 having the same diameter as the bolt through portion 542 and the buffer head hole 531, the thread is not formed on the outer peripheral surface.

The length of the bolt through portion 542 is the same or relatively longer than the height of the buffer through hole 521 can be maintained by the buffer body 520 is not pressed by the buffer bolt 540 to maintain the hardness.

In addition, the length of the bolt head portion 543 is the same or relatively shorter than the height of the buffer head hole 531, so that the bolt head portion 543 does not protrude out of the buffer head hole 531.

5 is a view showing a state of the grounding auxiliary unit according to an embodiment of the present invention.

A pair of ground portions 550 are coupled to the lower portion of the buffer cover portion 530. As shown in the illustrated embodiment, the grounding portion 550 has a pair formed to face each other on both sides with the buffer head hole 531 therebetween, and protrudes to have a pointed triangular cross section.

When the grounding unit 550 is installed on the ground for geodetic surveying work, it is embedded in the ground to help the top 100 to perform the surveying operation stably without shaking the outside wind.

An insertion space 551 is formed between the pair of grounding portions 550, and a fixing plate 552 formed of a magnetic material such as metal on one side of the pair of grounding portions 550 facing each other based on the insertion space 551. ) Is combined.

Since the grounding part 550 protrudes to have a pointed triangular cross section, the grounding part 550 may be easily embedded in a soil of soft soil such as soil or sand, but in a terrain that is difficult to be easily embedded such as indoors or concrete floors, the bottom surface thereof is narrow, which hinders stability. Can be

Therefore, in a terrain difficult to be easily embedded such as a concrete floor, the grounding auxiliary portion 560 may be inserted into the insertion space 551 between the pair of grounding portions 550 to change the pointed grounding portion 550 flat. In this case, the grounding auxiliary unit 560 will mainly be in contact with the ground.

The ground auxiliary portion 560 is formed in a rectangular parallelepiped shape as a whole, and permanent magnet plates 561 are coupled to both sides so as to face the fixing plate 552. By the fixing plate 552 and the permanent magnet plate 561, the ground auxiliary portion 560 may be naturally seated in the insertion space 551 between the ground portion 550, it may have a certain fixing force.

The ground auxiliary portion 560 is in contact with the bottom surface of the buffer cover portion 530, the elastic portion 562 disposed to be orthogonal to the pair of permanent magnet plate 561, the first portion disposed parallel to the elastic portion on the lower surface of the elastic portion The reinforcement part 563, the second reinforcement part 564 disposed on the lower surface of the first reinforcement part to be parallel to the first reinforcement part, and the coating part 565 disposed on the lower surface of the second reinforcement part to be parallel to the second reinforcement part. It may include.

The elastic part 562 imparts an elastic force to the ground auxiliary part 560 as a whole so that the ground auxiliary part can be stably grounded on an uneven surface. The elastic part 562 is 10 to 15 parts by weight of thermoplastic polyether ester elastomer (TPEE), azodicarbonamide (100 parts by weight of a polymer formed by polymerizing 20 to 30 parts by weight of vinyl acetate monomer based on 100 parts by weight of ethylene) It is preferred to include 8 to 10 parts by weight of azodicarbonamide) and 4 to 5 parts by weight of glyoxal.

If the vinyl acetate monomer constituting the polymer is less than 20 parts by weight, the degree of crystallinity is too high and the hardness of the elastic part is too high. If the vinyl acetate monomer is more than 30 parts by weight, the flexibility is too high, and the elastic part is not in place and can be slid and folded. Can be.

The thermoplastic polyether ester elastomer (TPEE) adds hardness to the elastic part. If the thermoplastic polyether ester elastomer is less than 10 parts by weight, the effect of reinforcing the hardness is insignificant, and if the thermoplastic polyether ester elastomer is more than 15 parts by weight, the melt is melted. There is a problem that the index is lowered and the workability is lowered.

Azodicarbonamide (azodicarbonamide) is to impart an additional elastic force to the elastic portion, and when the azodicarbonamide is less than 8 parts by weight, the effect of adding elastic force is insignificant; Could not do so, worsening price competitiveness.

Glyoxal is azodicarbonamide that traps gas generated above a certain temperature and imparts high temperature viscoelasticity to the elastic part. If glyoxal is less than 4 parts by weight, the mechanical properties of the elastic part may be insufficient. If it is more than the weight part, the foaming pressure may be excessively large, which may cause the elastic part to burst.

The first reinforcing portion 563 is disposed on the lower surface of the elastic portion 562 to prevent the elastic portion from being torn and broken. The first reinforcing part 563 is formed in a net shape so that the elastic part is not easily torn even when a force is applied to any part of the elastic part.

The second reinforcement part 564 is disposed on the lower surface of the first reinforcement part 563 to allow the elastic part to move flexibly. The second reinforcement portion 564 is formed of a fabric containing glass fiber or carbon fiber.

The coating part 565 is disposed on a lower surface of the second reinforcing part 564, and the grounding auxiliary part 560 including an elastic part 562, a first reinforcing part 563, and a second reinforcing part 564 is grounded. It serves to protect the earthing aid when in contact with it.

The coating part 565 preferably includes 25 to 40 parts by weight of styrene resin, 10 to 25 parts by weight of vinyl-based resin, and 20 to 30 parts by weight of paraffin based on 100 parts by weight of polyurethane, and prevents the elastic part from getting wet with water. In addition to the waterproof function may be provided with a wear-resistant function to prevent the elastic portion is worn.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have the knowledge of.

100: surface unit 110: upper unit bar 120: lower unit bar
200: height adjustment unit 300: upper coupling piece 310: lower coupling piece
400: height fixing 410: upper adjustment bar 411: height determination groove
420: lower adjustment bar 421: height adjustment hole 430: height extension
440: rotating part 450: elastic extension 451: incision
460: engaging portion 461: contact end 462: prevention end
500: buffer portion 510: buffer support portion 511: buffer coupling hole
512: rotating bearing 520: buffer body 521: buffer through hole
530: buffer cover 531: buffer head hole 540: buffer bolt
541 bolt screw portion 542 bolt through portion 543 bolt head portion
550: ground portion 551: insertion space 552: fixed plate
560: earthing auxiliary portion 561: permanent magnet plate 562: elastic portion
563: first reinforcing part 564: second reinforcing part 565: coating part

Claims (1)

A scale formed in the longitudinal direction in the form of a bar that can stand vertically; It is coupled to the lower part of the top surface portion is stretchable up and down to adjust the height of the top surface portion; A shock absorbing portion coupled to a lower portion of the height adjusting portion to mitigate vibrations applied from the ground; And a ground portion coupled to the lower portion of the buffer portion and protruding from a pointed shape; Including but not limited to:
The surface portion,
A lower unit bar engraved on the surface and having an open top and a closed bottom; And the upper side unit bar is formed in the shape of a rectangular bar with all the front closed; The upper unit bar is inserted into the lower unit bar is movable up and down,
The height adjustment unit,
A plate-shaped upper coupling piece coupled to a lower portion of the lower unit bar; An upper control bar coupled vertically to a lower portion of the upper coupling piece and having a plurality of height determining grooves formed at predetermined intervals along its length direction; A lower adjustment bar coupled to a lower portion of the upper adjustment bar and having a height adjusting hole penetrating therein to be inserted to move the upper control bar up and down along its length direction; Plate-shaped lower coupling piece coupled to the lower portion of the lower control wave; And a height fixing part coupled to the upper side of the lower adjusting bar and capable of fixing the height adjusting upper control bar; Including;
The height of the government,
A rotating part rotatably mounted to a height extension part protruding and extending to an upper side of the lower adjustment bar; An elastic extension part extending outwardly of the rotation part and having a plurality of cutout parts having elastic restoring force; And a 'C' shaped locking portion coupled to the top surface of the lower adjustment bar and disposed to cover the outer circumference of the height adjustment hole; Including,
The locking portion,
A contact end portion formed at one end of the engaging portion and contacting the end of the elastic extension portion and disposed at a position not exceeding an area where a plurality of height determining grooves are disposed; And a prevention end portion formed at the other end of the locking portion and in contact with the side surface of the elastic extension portion and disposed at a position beyond the area where the height determining groove is disposed. Including;
The elastic extension part is rotated together in accordance with the rotation of the rotating part, the end is retracted as it comes in contact with the contact end, is expanded while extending over the contact end is inserted into the height-determining groove, blocked by the prevention end, can not be rotated anymore,
The buffer part,
A buffer support unit mounted at a lower portion of the lower coupling piece and coupled to the lower coupling piece via a rotation bearing to allow the lower coupling piece to rotate relatively; A cushioning body portion coupled to a lower portion of the buffer support portion and having a rectangular parallelepiped shape in which a buffer through hole is formed; A buffer cover portion coupled to cover the lower surface of the buffer body portion and having a buffer head hole formed therein; And a buffer bolt that is fastened to the buffer coupling hole formed through the buffer head hole and the buffer through hole, and connected to the buffer cover portion, the buffer body portion, and the buffer support portion. Including;
The buffer bolt,
A bolt screw part having the same diameter as the buffer coupling hole having a thread formed therein and a thread formed on an outer circumferential surface thereof; A bolt through portion having the same diameter as the buffer through hole and having no thread formed on its outer circumferential surface; And a bolt head portion having the same diameter as that of the buffer head hole and having no thread formed on the outer circumferential surface thereof. Including,
The ground part is coupled to the pair facing each other with the buffer head hole in the lower portion of the buffer cover portion, the vibration damping protection device for geodetic surveying, characterized in that the insertion space is formed between the pair of ground portions.

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