KR102068208B1 - Tripod device for geodetic surveying - Google Patents

Abstract

The present invention relates to a tripod use for large area surveying work. More specifically, the present invention relates to an apparatus for fixing the tripod for large area surveying, comprising: a plurality of leg units mounted on a lower part of an upper support to be rotatable; a leg support unit capable of connecting the lower part of the upper support and the inner side of the plurality of leg units to support the leg units in an open state; a height adjusting unit coupled to an upper part of the upper support and installed to be stretchable up and down; a buffer unit coupled to a lower end of the leg 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 plurality of leg units can be easily supported in a simple operation manner.

Description

Device for fixing tripod for geodetic survey {TRIPOD DEVICE FOR GEODETIC SURVEYING}

The present invention relates to a tripod for use in geodetic surveying, more specifically, a tripod for geodetic surveying that can easily support the leg portion with a simple operation and the tripod does not slide easily from the ground to prevent the deterioration of the geodetic surveying A device for fixing.

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 of each measuring point, display it in figures or figures, and stake out in the field.

In geodetic surveying, surveying instruments (or measuring instruments) such as VRS (virtual reference point) and RTK are used, and these precision survey instruments are generally mounted on a tripod to be positioned at a certain height on the ground. In the following description, a measuring instrument, a survey instrument, or a geodetic instrument and the like have the same meanings and will be appropriately selected and used according to the context.

The requirements for these geodetic tripods are that they must be firmly inserted into the ground so that they can be securely supported without being knocked over by wind or external stratification and the instrument must be able to adjust its height and orientation.

The conventional geodetic tripod is configured to include a configuration such as a measuring instrument mount is mounted on the top of the upper support and the upper support for supporting the three legs and the upper end of the legs rotatably.

The legs are configured to be adjustable in length having an upper leg and a lower leg, and the upper end of the upper leg is pivotally connected to the upper support so that the legs can be opened and closed.

That is, in geodetic surveying using a geodetic tripod, the level of the upper support is roughly adjusted by adjusting the lengths of the three legs according to the curvature of the ground, and then the horizontal of the geodetic surveying device itself mounted on the upper support. The final level is adjusted by the adjustment function.

However, since the conventional geodetic tripod has no control means in the direction of folding the three legs, the horizontal state adjusted by folding one or more of the three legs due to vibration or external impact while being mounted on the ground is disturbed. There is a problem that the tripod can fall down.

In addition, in the conventional geodetic tripod tripod, when the ground of the surveying place is made of concrete, asphalt, etc., or if the tripod is installed indoors as needed, the tripod is easily collapsed when an impact is applied to the tripod because the ground rod cannot be inserted into the ground. Has a problem.

In particular, even if an impact is applied to only one of the legs of the tripod, the tripod is unbalanced and easily fell, and the tripod may be shaken down by the strong wind in the open air, thereby causing a large economic loss in which expensive surveying equipment is damaged.

Furthermore, in the conventional geodetic tripod, when a shock or vibration is applied to the tripod from the ground, the shock or vibration is transmitted as it is to the surveying instrument mounted on the mount through the legs, so that the surveying instrument is shocked or shaken. There is a problem that the measurement accuracy of

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.

The present invention is to solve the above-mentioned problems of the prior art, it is an object of the present invention to provide a device for fixing a geodetic surveying tripod that can easily support a plurality of legs in a simple operation method.

In addition, the present invention is to provide a device for fixing the tripod for geodetic surveying that can be stably supported on a hard ground or indoors difficult to insert the grounding portion, and to prevent foreign matter from being caught in the grounding portion. have.

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. .

The configuration of the present invention for achieving the above object, a plurality of legs mounted to be rotatable in the lower portion of the upper support; A leg support part capable of connecting the lower part of the upper support and the inner side of the plurality of leg parts to support the leg part in an open state; It is coupled to the upper portion of the upper support and the height adjustment unit is installed to be stretched up and down; A buffer unit coupled to the lower end of the leg 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 device for fixing the geodetic surveying tripod according to an embodiment of the present invention, the upper end is hinged to the lower portion of the upper support can be rotated up and down, a pair of extension members spaced apart from each other arranged in parallel Upper leg; A lower leg disposed under the upper leg and slidably inserted between the pair of extension members; And a leg fastener coupled to a lower end of the upper leg so that the lower leg is inserted and fixed thereto. It is preferable to include.

In the device for fixing the geodetic surveying tripod according to an embodiment of the present invention, the leg support portion, the upper end is fixed to the center portion of the upper support extending downward; A support ring having an inner diameter larger than an outer diameter of the support rod and inserted into the support rod so as to be elevated; A connecting rod whose one end is rotatably connected to the inside of the leg fixture and the other end is rotatably connected to the outer side of the support ring; And a fixing screw formed on the inner circumferential surface of the female screw to be screwed to the male screw formed on the lower end of the support rod. It is preferable to include.

In the device for fixing the geodetic surveying tripod according to an embodiment of the present invention, the height adjustment portion is coupled to the upper portion of the upper support and the lower adjustment bar is formed through the height adjustment hole along the longitudinal direction; An upper adjustment bar inserted into an upper portion of the lower adjustment bar and movable upward and downward, and having a plurality of height determination grooves formed to have a predetermined distance along its length direction; A seating piece coupled to the upper portion of the upper control bar, wherein the geodetic surveying device is seated on the upper portion; 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 device for fixing the geodetic surveying tripod according to an embodiment of the present invention, the height fixing portion, the rotating part 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 portion 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 device for fixing the geodetic tripod tripod according to an embodiment of the present invention, the buffer unit is coupled to the lower portion of the lower leg, the buffer body portion of the rectangular parallelepiped form is formed through the buffer hole; 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 in the lower leg by penetrating the buffer head hole and the buffer through hole, and connecting the buffer cover part, the buffer body part, and the lower leg to one; It is preferable to include.

The buffer bolt in the device for fixing the geodetic surveying tripod according to an embodiment of the present invention, the screw thread formed on the outer circumferential surface having the same diameter as the buffer coupling hole formed with a thread inside; 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 device for fixing the geodetic surveying tripod according to an embodiment of the present invention, the pair 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, it is possible to stably support a plurality of legs using the leg support portion, there is an effect of preventing the leg easily collapses only by simple operation.

In addition, when the tripod is mounted on the soil floor, the present invention inserts a grounding part into the ground, and when the tripod is mounted on a hard ground such as an asphalt floor, a cement floor, or a stone floor, the grounding auxiliary part can be safely supported. There is this.

Furthermore, the present invention has the advantage that the geodetic surveying device can be moved up and down using the height adjustment unit, so that precise surveying work is possible, and the shock applied to the leg from the ground can be effectively attenuated using the buffer unit.

1 is a view showing the overall appearance of the device for fixing the geodetic tripod for tripod according to an embodiment of the present invention.
2 is a view showing a state of the height adjustment unit according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing a view from above the height of the government according to 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 implement 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 explain 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.

1 is a view showing the overall appearance of the device for fixing the geodetic tripod according to an embodiment of the present invention.

As shown, the device for fixing the geodetic tripod according to the invention a plurality of legs 200, leg support 300, height adjustment 400, the buffer 500 and the ground 600 )

The plurality of leg parts 200 are rotatably mounted to the lower part of the upper support 100 on which the geodetic surveying device (not shown) can be mounted. The leg part 200 is hinged to the lower end of the upper support 100, the upper end is rotatable up and down, a pair of extension members are spaced apart from each other and arranged in parallel with the upper leg 210, It is disposed in the lower portion and the lower leg 220 is slidably inserted between the pair of extension members and coupled to the lower end of the upper leg, and includes a leg fastener 230 to allow the lower leg is inserted and fixed.

Since the lower leg 220 is slidably inserted into the upper leg 210, the plurality of leg portions 200 may adjust the length of the upper and lower legs, thereby maintaining the horizontality of the upper support 100.

The leg fastener 230 includes a box-shaped guide that is open at the upper and lower ends and a fastening bolt fastened to the guide and the tip is in close contact with the lower leg 220. The guide may be fastened to the upper leg 210 through a screw.

The leg support part 300 extends from the lower part of the upper support part 100 and is connected to the inner side of the plurality of leg parts 200. The leg support part 200 may be supported in a fall state to prevent the tripod from falling down easily. .

Specifically, the leg support 300 has a support rod 310 that is fixed to the upper end in the center of the upper support 100 extending downwards, the support ring is installed to the elevating rod by having an inner diameter larger than the outer diameter of the support rod 320, one end is connected to the inside of the leg fastener 230 is rotatable and the other end is connected to the outer side of the support ring 320 so as to be rotatable connecting rod 330 and the lower end of the support rod 310 formed ( 311) includes a fixing screw 340 is formed on the inner circumferential surface so that the female threaded portion.

The fixing screw 340 has a tapered outer circumferential surface whose upper end is relatively smaller than the inner diameter of the support ring 320 and the lower end thereof has an outer diameter relatively larger than the inner diameter of the support ring 320.

The lower end portion of the tapered outer circumferential surface of the fixing screw 340 may be formed with a non-slip handle for allowing the operator to turn the fixing screw 340 by hand without using a separate tool.

When the fixing screw 340 is turned in the direction to be relaxed in the male screw portion 311 formed at the lower end of the support rod 310, a screw action between the male screw portion 311 of the support rod 310 and the female screw portion of the fixing screw 340. As a result, the fixing screw 340 moves downward, and thus the tapered outer circumferential surface portion is relaxed from the inner circumferential surface of the support ring 320 so that the support ring 320 can be elevated.

When the three leg parts 200 are folded in this state, the connecting rod 330 is pivoted between the leg fixing tool 230 and the support ring 320 to be folded together with the leg part 200.

On the contrary, when the leg 200 is unfolded while the leg 200 and the connecting rod 330 are folded, the support ring 320 descends along the supporting rod 310 and the connecting rod 330 is rotated to rotate the leg ( Unfold with 200). Accordingly, the inner circumferential surface of the support ring 320 is fitted to the tapered outer circumferential surface portion of the fixing screw 340.

In this state, when the fixing screw 340 is turned in the fastening direction, the female screw portion of the fixing screw 340 rises while being engaged with the male screw portion 311 formed at the lower end of the supporting rod 310, and thus the tapered outer peripheral surface portion is supported by the ring. It is in close contact with the inner circumferential surface of 320.

That is, the outer peripheral surface of the fixing screw 340 is formed in the tapered outer peripheral surface portion of the upper end is smaller than the inner diameter of the support ring 320 and the lower end is larger than the inner diameter of the support ring 320, the inner peripheral surface of the support ring 320 In close contact with the support ring 320 is a fixed state does not rise or fall.

The height adjustment unit 400 is coupled to the upper portion of the upper support 100 and is installed to be stretchable up and down. The seating piece 430 is coupled to the upper end of the height adjustment unit 400, and the geodetic surveying device (not shown) is coupled to the upper portion of the seating piece 430, so that the geodetic surveying device according to the vertical expansion and contraction of the height adjustment unit 400 You can also move up and down.

Figure 2 is a view showing a state of the height adjustment unit according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing the appearance of the height fixing unit according to an embodiment of the present invention from above.

As shown, the lower control bar 410 is coupled to the upper portion of the upper support 100, the upper control bar 420 is coupled to the upper portion of the lower control bar 410, the upper control bar 420 The mounting piece 430 is coupled to the upper portion.

A plurality of height determining grooves 421 are formed in the upper adjustment bar 420 to have a predetermined distance along its length direction, and the height adjustment holes 411 are long in the lower adjustment bar 410 along its length direction. Is formed.

The upper adjustment bar 420 is inserted into the height adjustment hole 411 formed in the lower adjustment bar 410 can be moved up and down, and thus the overall height of the geodetic surveying device coupled to the upper can be adjusted.

The upper side portion of the lower adjustment bar 410 is mounted with a height fixing portion 440 that can fix the height adjustment bar 420 is adjusted. The user may fix the upper adjustment bar 420 to a desired position by using the height fixing unit 440.

In detail, the height fixing part 440 is pivotal part 441 mounted to be rotatable in the height extension part 412 which protrudes and extends on the upper side of the lower adjustment bar 410, and extends outward of the rotation part. Part 443 is formed is coupled to the upper surface of the elastic extension portion 442 and the lower control bar 410 having an elastic restoring force and is formed in the 'C' shape to be wrapped around the outer periphery of the height adjustment hole 411 The engaging portion 444 of the.

Since a plurality of cutouts 443 are disposed at predetermined intervals in the middle portion of the elastic extension part 442, the elastic extension part 442 is retracted in the direction of the rotation part 441 or opposite to the rotation part 441. Can be unfolded in the direction.

A contact end 445 is formed at one end of the engaging portion 444, and a prevention end 446 is formed at the other end. When the height of the upper adjustment bar 420 is determined, the elastic extension portion 442 is located between the contact end 445 and the prevention end 446 is inserted into the height determining groove 421, the upper adjustment bar 420 The elastic extension portion 442 is located outside the contact end portion 445 as shown in FIG.

The contact end portion 445 is in contact with the end of the elastic extension portion 442 in accordance with the rotation of the elastic extension portion 442, the elastic extension portion 442 may selectively ride over. The elastic restoring force of the elastic extension part 442 is such that the elastic extension part 442 can pass over the contact end part 445 when the rotary part 441 is rotated by inserting a tool into the tool groove formed in the rotation part 441. Is determined.

To this end, the contact end portion 445 has a round shape similar to the end of the elastic extension portion 442, and is disposed at a position not exceeding the region where the height determining groove 421 is disposed.

When the user rotates the pivoting portion 441 in the clockwise direction, the elastic extension portion 442 is in contact with the contact end portion 445, and in this state is further applied to rotate the pivoting portion 441 to the incision portion 443 As a result, the elastic extension portion 442 is retracted and is carried over the contact end portion 445 and inserted into the height determining groove 421.

If the elastic extension portion 442 is beyond the contact end portion 445, if the user further rotates the rotating portion 441, the side portion of the elastic extension portion 442 is in contact with the prevention end portion 446 is blocked, Accordingly, excessive rotation of the elastic extension part 442 is prevented.

The prevention end portion 446 is in contact with the side surface of the elastic extension portion 442, and is disposed at a position beyond the area where the height determining groove 421 is disposed. That is, if the contact end 445 is disposed in a portion which does not invade the area where the height determining groove 421 is disposed, the prevention end 446 is disposed on the area in which the height determining groove 421 is disposed.

The contact end 445 is in contact with the end of the elastic extension 442, while the prevention end 446 is formed to be in contact with the side of the elastic extension 442, the elastic extension 442 is the prevention end It is impossible to go beyond 446.

If the user wants to adjust the height of the upper adjustment bar 420 again, by rotating the rotating part 441 counterclockwise to the contrary to the above process, the elastic extension part 442 contracts and the contact end part 445 again. The ride is separated from the height determination groove 421.

As such, the present invention has the advantage that the height can be adjusted very easily because the upper control bar 420 can be adjusted to the degree of being inserted into the lower control bar 410 only by rotating the rotating part (441).

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

As illustrated in FIG. 1, the shock absorbing part 500 is coupled to the lower end of the lower leg 220, and includes a shock absorbing body part 510, a shock absorbing cover part 520, and a shock absorbing bolt 530. The ground part 600 is coupled to the lower part of the buffer part 500.

A buffer coupling hole 221 is formed along the longitudinal direction of the lower center of the lower leg 220. The inner diameter of the buffer coupling hole 221 is formed with a plurality of threads along the longitudinal direction.

The buffer body 510 is coupled to the lower portion of the lower leg 220, the buffer through-hole 511 is formed in the center. The inner diameter of the buffer through hole 511 is different from the buffer coupling hole 221 in that no thread is formed.

The buffer body 510 is formed in a rectangular parallelepiped shape, and is made of a material having elasticity to prevent the shock or vibration applied to the tripod from the ground to the upper part.

For example, the buffer body 510 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 520 is coupled to cover the lower surface of the buffer body portion 510, the buffer head hole 521 is formed in the center. Similar to the buffer through-hole 511, the thread is not formed in the inner diameter of the buffer head hole 521.

The buffer cover portion 520 is formed to have a cross-section of the 'c' shape corresponding to the shape of the lower surface of the buffer body portion 510. The shock absorbing cover part 520 prevents the shock absorbing body part 510 from being easily contacted with the outside.

In other words, the buffer cover 520 is made of a material having a relatively high hardness than the buffer body 510. The buffer cover part 520 may be made of various materials such as plastic or metal of high hardness.

As described above, the buffer body 510 buffers external vibrations, but having a too high hardness can hardly perform a 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 510 is composed of a material that is as smooth and elastic as possible to maximize the cushioning function, the buffer cover 520 is made of a material of high hardness to prevent wear, Both functions can be satisfied at the same time.

The buffer bolt 530 is fastened to the buffer coupling hole 221 through the buffer head hole 521 and the buffer through hole 511, the buffer cover portion 520, the buffer body 510 and the lower leg 220 )) Into one.

Specifically, the buffer bolt 530 has the same diameter as the buffer coupling hole 221 and has the same diameter as the bolt screw portion 531, the threaded through-hole 511, the thread is formed on the outer peripheral surface and the thread is not formed on the outer peripheral surface It includes a bolt head portion 533 having the same diameter as the bolt through portion 532 and the buffer head hole 521, the thread is not formed on the outer peripheral surface.

The length of the bolt through portion 532 is the same or relatively longer than the height of the buffer through hole 511 can be maintained by the buffer body 510 is not squeezed by the buffer bolt 530 to maintain the hardness.

In addition, the length of the bolt head portion 533 is the same or relatively shorter than the height of the buffer head hole 521 so that the bolt head portion 533 does not protrude out of the buffer head hole 521.

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

A pair of ground parts 600 are coupled to the lower portion of the buffer cover part 520. As shown in the illustrated embodiment, the grounding part 600 has a pair formed to face each other on both sides with the buffer head hole 521 therebetween, and protrudes to have a pointed triangular cross section.

When the grounding unit 600 is installed on the ground for geodetic surveying work, it is embedded in the ground to help the surveying equipment to perform the geodetic survey work stably without shaking the outside wind.

An insertion space 610 is formed between the pair of grounding portions 600, and a fixing plate 620 made of magnetic material such as metal on one side of the pair of grounding portions 600 facing each other based on the insertion space 610. ) Is combined.

Since the grounding part 600 protrudes to have a pointed triangular cross section, the grounding part 600 may be easily embedded in the ground of a 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 part 630 may be inserted into the insertion space 610 between the pair of grounding parts 600 to change the pointed grounding part 600 to be flat. In this case, the grounding auxiliary unit 630 will mainly be in contact with the ground.

Since the grounding auxiliary part 630 is formed in a flat shape, soil or small stones do not enter, so that foreign substances such as soil or small stones may be grounded on the ground such as an asphalt floor, a cement concrete floor, or a stone floor or a tile floor. As a result, the leg part 200 does not slip, and the tripod can be stably maintained at the mounted position without moving the position, thereby ensuring measurement accuracy.

The ground auxiliary portion 630 is formed in a rectangular parallelepiped shape as a whole, and permanent magnet plates 631 are coupled to both sides thereof so as to face the fixing plate 620. By the fixing plate 620 and the permanent magnet plate 631, the grounding auxiliary portion 630 may be naturally seated in the insertion space 610 between the grounding portion 600, it may have a certain fixing force.

The ground assisting part 630 is in contact with the bottom surface of the buffer cover part 520 and is disposed to be orthogonal to the pair of permanent magnet plates 631, and a first side disposed parallel to the elastic part on the bottom of the elastic part. The reinforcement part 633, the second reinforcement part 634 disposed on the lower surface of the first reinforcement part to be parallel to the first reinforcement part, and the coating part 635 disposed on the lower surface of the second reinforcement part to be parallel to the second reinforcement part. It may include.

The elastic portion 632 imparts an elastic force to the ground auxiliary portion 630 as a whole so that the ground auxiliary portion can be stably grounded on an uneven surface. The elastic part 632 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 with respect to 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 crystallinity is excessively high and the hardness of the elastic part is too high. If the vinyl acetate monomer is more than 30 parts by weight, the elasticity 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, and when the azodicarbonamide is more than 10 parts by weight, it further affects the elastic force. 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 part 633 is disposed on the lower surface of the elastic part 632 to prevent the elastic part from being torn and broken. The first reinforcing part 633 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 reinforcing portion 634 is disposed on the lower surface of the first reinforcing portion 633 to allow the elastic portion to move flexibly. The second reinforcing portion 634 is formed of a fabric containing glass fiber or carbon fiber.

The coating part 635 is disposed on the lower surface of the second reinforcing part 634 and the grounding auxiliary part 630 including the elastic part 632, the first reinforcing part 633, and the second reinforcing part 634 is grounded. It serves to protect the earthing aid when in contact with it.

The coating part 635 preferably includes 25 to 40 parts by weight of styrene resin, 10 to 25 parts by weight of vinyl 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: upper support 200: leg 210: upper leg
220: lower leg 221: buffer coupling hole 230: leg fasteners
300: leg support 310: support rod 311: male thread
320: support ring 330: connecting rod 340: fixing screw
400: height adjustment unit 410: lower adjustment bar 411: height adjustment hole
412: height extension 420: upper adjustment bar 421: height determination groove
430: Settlement 440: Heightening Government 441: Ministry of Government
442: elastic extension 443: incision 444: locking
445: contact end 446: prevention end 500: buffer
510: buffer body 511: buffer through hole 520: buffer cover
521: buffer head hole 530: buffer bolt 531: bolt screw part
532 bolt through portion 533 bolt head 600 ground portion
610: insertion space 620: fixed plate 630: grounding auxiliary
631 permanent magnet plate 632 elastic portion 633 first reinforcement portion
634: second reinforcement unit 635: coating unit

Claims (1)

A plurality of legs mounted on the lower portion of the upper support to be rotatable; A leg support part capable of connecting the lower part of the upper support and the inner side of the plurality of leg parts to support the leg part in an open state; It is coupled to the upper portion of the upper support and the height adjustment unit is installed to be stretched up and down; A buffer unit coupled to the lower end of the leg 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 leg portion,
An upper leg whose upper end is hinged to the lower part of the upper support and is rotatable vertically, the pair of extension members being spaced apart from each other and arranged in parallel; A lower leg disposed under the upper leg and slidably inserted between the pair of extension members; And a leg fastener coupled to a lower end of the upper leg so that the lower leg is inserted and fixed thereto. Including,
The leg support portion,
A support rod having a top fixed to a central portion of the upper support and extending downward; A support ring having an inner diameter larger than an outer diameter of the support rod and inserted into the support rod so as to be elevated; A connecting rod whose one end is rotatably connected to the inside of the leg fixture and the other end is rotatably connected to the outer side of the support ring; And a fixing screw formed on the inner circumferential surface of the female screw to be screwed to the male screw formed on the lower end of the support rod. Including;
The height adjustment unit,
A lower adjustment bar coupled to an upper end of the upper support and having a height adjustment hole formed along the length direction thereof; An upper control bar inserted into an upper portion of the lower control bar and movable upward and downward, and having a plurality of height determination grooves formed to have a predetermined distance along its length direction; A seating piece coupled to the upper portion of the upper control bar, wherein the geodetic surveying device is seated on the upper portion; 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 being extended beyond the contact end is inserted into the height-determining groove, blocked by the preventive end can no longer rotate,
The buffer part,
Is coupled to the lower portion of the lower leg and the buffer body portion of the rectangular parallelepiped form is formed through the buffer hole; 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 in the lower leg by penetrating the buffer head hole and the buffer through hole, and connecting the buffer cover portion, the buffer body portion, and the lower leg to one; 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 shock absorbing head hole and the thread of which is not formed on the outer circumferential surface thereof. Including,
The ground portion,
A pair is coupled to face each other with a buffer head hole in the lower portion of the buffer cover portion, the device for fixing the geodetic tripod tripod, characterized in that the insertion space is formed between the pair of ground.

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