KR101904290B1 - Ball-truss with assembly structure of a collet chuck type and truss assembling structure using the ball-truss - Google Patents

Abstract

A bolt with an assembling structure of a collet chuck type and a truss fastening structure using the same are disclosed. The present invention relates to a span having a plurality of spans each having a fastening portion fixed to a tip of a span tube extending in one direction and at least one of a plurality of upright walls erected at each side so as to form a space in which a bottom surface is formed, And a fastening bolt for fastening the cover and the main body, wherein the fastening bolt is fastened to the inside of the main body by a collet And a collet chuck (COLLECT CHUCK). The collet chuck type assembly structure can be provided. Therefore, the present invention improves corrosion resistance by blocking moisture introduced into the bolt, and enhances ease of assembly and resistance to twisting.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boltless bolt having a collet chuck type assembling structure and a truss fastening structure using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collet chuck type assembling structure and a truss fastening structure using the collet chuck type assembly. More particularly, the present invention relates to a collet chuck (COLLET CHUCK) type assembling structure and a truss fastening structure using the same.

Generally, a large number of assembly trusses are installed and installed in the field in order to install a large space structure rather than temporary buildings such as exhibition halls, stadiums, stadiums and indoor stadiums.

Large structures using assembly trusses are relatively easy to install and dismantle, and the total weight is relatively low, so that the risk of collapse is relatively low. In particular, the structure and size of the truss can be varied, Therefore, the demand is gradually increasing.

In this case, a plurality of truss bars may be connected for installation of the large structure, and the angle of the truss bars may be varied through a bolt. Accordingly, the large structures have been welded and fixed in place in a manner that they are connected to each other in various forms using a plurality of assembly type truss bars.

However, when the truss bar is fixed by the welding work in the field, the finish condition is poor compared to the factory welding. Corrosion occurs on the welding part as the seal passes. Also, since the welding operation can not be performed in case of rain, There is a problem that the cost increases due to the rise.

Therefore, when the bolt is seated in the bolt hole pre-drilled in the bolt-screw, the washer and nut are screwed into the bolt hole, It's not often the case.

In addition, the nut is fixed in a large size so that it can not be loosened, and then a pipe is inserted into the back of the wrench, and the nut is firmly fixed by applying force. However, such a nut is exposed to the outside.

Considering this situation, bolt nuts made of stainless steel or zinc may be used. However, it is usually necessary to use materials specified by specifications rather than by personal judgment.

In addition, the bolts have to be cut when they are corroded or the mountain is broken over time. The cut bolts are shortened in length, making it difficult to re-work. In the process of assembling the truss bars, However, the conventional structure using the truss bar and the bolt is limited in the assembling time, and a simple technical structure is required.

Korean Patent No. 10-1065451

Accordingly, an object of the present invention is to provide a boltless bolt having an assembling structure of a collet chuck type which is capable of preventing moisture from entering the bolt and improving the assembling property between the span and the bolt, and Thereby providing a truss fastening structure.

Another object of the present invention is to provide a boltless bolt having a collet chuck type assembling structure which can increase the resistance of the bolt to torsion and prolong the life of the truss structure, and a truss fastening structure using the same.

Therefore, the present invention includes the following embodiments in order to achieve the above object.

An embodiment of the present invention is characterized in that the span is formed by a plurality of spans having a fastening portion fixed to the tip of a span tube extending in one direction and at least one of a plurality of upright walls erected on each side to form a space in which a bottom surface is formed inside And a fastening bolt for fastening the body. The fastening part is fastened by elastic force at the tip of the span tube, and is inserted and retracted from the inside of the body. And the main body further comprises an upper fixing jaw which is protruded upward from the upper end of the upright wall and is fastened to the lower surface of the cover, and the cover is protruded downward along the sides of the upper fixing jaw And a plurality of support ribs radially extending from the lower surface and reinforcing the rigidity of the lower fixing jaw and the supporting ribs And the end portions are spaced apart from each other to form an assembling groove into which the upper fixing jaw is inserted. The bolt may have a collet chuck type fastening structure.

In the above embodiment, the fastening portion includes an end tube having a side portion in close contact with the inner surface of the span tube and a back portion made of an upright plate material to close the span tube, and a hollow tube extending from the center portion of the end tube to the back side portion so that the fastening bolt is inserted. And a plurality of radiation plates extending from the guide tube to the inner side surface of the end tube.

According to the bolt with the collet chuck type assembling structure of the present invention described above, assembling is facilitated by assembling the span tube using the collet chuck, thereby shortening the working time.

Also, the present invention can increase the resistance to twisting of the bolt, thereby preventing failure and breakage and extending the service life.

1 is a perspective view showing a truss structure in which a bolt and a span are combined according to the present invention.
2 is an exploded perspective view showing a boltus of the present invention.
3 is a sectional view taken along the line AA in Fig.
4 is a perspective view showing a cover and a main body of the present invention.
5 is a front perspective view showing a fastening part of the present invention.
6 is a rear perspective view showing the fastening portion of the present invention.
7 is a cross-sectional view of the collet chuck of the present invention.
8 is a view showing a coupling relationship between the span tube and the main body of the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

1 is a perspective view showing a truss structure in which a bolt and a span are combined according to the present invention.

1 is a perspective view showing a truss structure in which a bolt and a span are combined according to the present invention.

Referring to FIG. 1, the truss fastening structure according to the present invention includes a plurality of spans 200 extending in a hollow tube shape, a ball truss to which a plurality of spans 200 are connected, spans 200, And a unit truss 800 constituting a polygonal shell 810 by fastening between the bolts 100.

The span 200 extends inwardly into a hollow tube and is assembled to a different bolt 100 at each end. Here, the span 200 has a collet chuck type fastening structure that is contracted by an elastic force at both ends, and is fastened to the bolt.

The bolts 100 extend in mutually different directions to fix and support one end portion of the span fastened in a fitting manner. Here, referring to the drawings, a total of three spans 200 are connected, and each span extends in an equiangular direction.

The hexagonal shell 810 is formed at the center of the unit truss 800 as the bolts 100 and the spans 200 are fastened to each other in a mutually equiangular direction. A plurality of unit trusses 800 are connected to each other to form a large truss structure.

The above embodiment of the present invention will be described in detail below.

FIG. 2 is an exploded perspective view showing a boltus of the present invention, FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2, and FIG. 4 is a perspective view showing a cover and a main body.

2 to 4, a bolt 100 according to the present invention includes a cover 120 and a body 140 fastened by bolts of a fixing bolt 110. The span 200 includes a span tube 220 extending in the longitudinal direction and a coupling part 210 fastened to the main body 140 at the tip of the span tube 220.

The cover 120 closes the upper portion of the body 140 opened by the fixing bolt 110. The cover 120 is provided with an upper fixing hole 121a through which the fixing bolt 110 is communicated and the fixing bolt 110 is bolted to the main body 140 at a position corresponding to the upper fixing hole 121a And an assembly female thread 141a is formed.

The cover 120 includes a cover plate 121 formed of a flat plate having a polygonal shape (for example, hexagonal shape) coinciding with the main body 140 and a lower fixing protrusion 121 protruding downward along each side of the cover plate 121 And a plurality of support ribs 122 integrally formed with the cover plate 121 and extending radially from the center at the lower surface.

The cover plate 121 is formed of a flat plate and has a polygonal shape having mutually equal angles, and includes an upper fixing hole 121a through which the fixing bolts 110 communicate with each other.

The lower fixing step 124 is projected downward from the respective sides of the cover plate 121. At this time, the lower fixing jaws 124 extend along the sides of the cover plate 121 having an equal angle to each other, and extend at equal angles.

More preferably, if the bolt 100 of the present invention has a hexagonal shape and the three spans 200 are connected to each other at an equiangular position, the torsional strength and compressive strength of the bolt 100 may be improved .

The support ribs 122 are integrally formed with the cover plate 121 and extend radially about the upper fixing hole 121a to reinforce the strength of the cover plate. For example, the support rib 122 supports the cover plate 121 so as to prevent the cover plate 121 from being warped as it extends radially from the lower surface of the cover plate 121.

The end of the support rib 122 may be spaced apart from the lower fixing step 124 by a predetermined distance to form an assembly groove 123 into which an upper fixing step 143 described later may be inserted.

In addition, it is preferable that a plurality of support ribs 122 extend radially from the lower surface of the cover plate 121 with the upper fixing hole 121a as a center, and extend to have the same angle.

The main body 140 includes a circular bottom plate 141 and a plurality of upstanding walls 142 that are erected on the outer circumferential surface of the bottom plate 141 and are mutually conformed to each other and spans from at least one of the plurality of upstanding walls 142 A main body coupling part 144 to which the coupling part 210 of the main body 200 is connected and an upper fixing step 143 protruding upward from the upper end of the upright wall 142

The lower plate 141 constitutes the bottom surface of the main body 140 and has the same shape as the cover 120. The lower plate 141 includes an assembling female screw 141a to which the fixing bolt 110 is fastened, a flat plate 141b forming the bottom surface, and a curved surface 141c curved upward from each side of the flat plate 141b .

Here, the assembling female thread 141a is positioned directly below the upper fixing hole 121a formed at the center of the cover plate 121, and the fixing bolt 110 is inserted in communication.

The flat plate 141b has a casting shape to form a bottom surface, and the curved surface 141c is curved so as to extend upward from each side of the flat plate 141b. Here, the curved surface 141c is connected to each upright wall 142.

The upright wall 142 is formed in a multiple number standing upright in the lower plate 141. Each upright wall 142 is formed in the same number as the sides of the cover plate 121 in conformity with each other.

The main body coupling portion 144 is provided with a coupling hole 144a through which the fixing portion 230 for fixing the span 200 is communicated and a rotation preventing bolt 231a for preventing rotation of the span 200, And a hole 144b.

Here, the main body coupling portion 144 is selectively installed in a direction in which the spans 200 are connected among a number of the upright walls 142. For example, if the main body 140 is hexagonal, it is formed on three upright walls that are not adjacent among the six upright walls 142 in total.

In other words, the main body coupling part 144 includes the first upright wall 142, the third upright wall 142 and the fifth upright wall 142 in the hexagonal main body 140 in which the upright walls 142 of the first to sixth up- May be formed on the first upright wall 142 or on the second upright wall 142 and the fourth and sixth upright walls 142.

In order to improve the compressive strength and the torsional strength of the bolster 100, the span 200 is formed in a mutually equiangular direction. It is desirable to consider the number and location so that each can be connected. For example, when the main body 140 is hexagonal, the main body coupling portions 144 are formed at three equally spaced, non-adjacent upstanding walls 142, respectively.

The upper fixing jaw 143 protrudes upward from the upright wall 142 and is inserted into the mounting groove 123 which is a spaced space formed between the lower fixing jaw 124 and the supporting rib 122 on the lower surface of the cover plate 121 do.

That is, in the present invention, the cover 120 and the main body 140 are fixed to each other by a fixing bolt 110 and an upper fixing step 143 formed on the upper end of the upright wall 142, (123) having a spaced space between the support rib (124) and the support rib (122). The coupling between the upper fixing step 143 and the mounting groove 123 and the lower fixing step 124 forms a labyrinth structure. Therefore, the present invention can prevent water inflow and improve corrosion resistance.

The span 200 includes a span tube 220, a fastening part 210 fastened at both ends of the span tube 220 by an elastic force, a fastening part 230 fastening the fastening part 210 and the body 140, . And the double fastening part 210 is formed as a COLLECT CHUCK type structure. A more detailed configuration will be described with reference to Figs. 2 to 8. Fig.

FIG. 5 is a front perspective view showing the fastening portion of the present invention, FIG. 6 is a rear perspective view of the fastening portion, FIG. 7 is an engaging sectional view of the fastening portion, and FIG. 8 is a sectional view showing a combined structure of fastening portions and body engaging portion.

2 to 8, the fixing portion 230 includes a fastening bolt 231 that is inserted into the fastening portion 210 through the fastening hole 144a and a fastening bolt 231 that is fastened through the fastening portion 210 And a fastening nut 232 for fastening a fastening bolt 231 which communicates with the fastening part 210. The fastening bolt 231 '

The coupling part 210 is bolted to the main body coupling part 144 as a collet chuck. The fastening part 210 includes an end tube 213 which is assembled with a fastening nut 232 and is fastened to the distal end of the span tube 220 by an elastic force, A guide tube 212 through which a fastening bolt 231 drawn out from the body coupling part 144 passes through the center of the end tube 213 and a radiation plate 211 extending radially from the inside of the end tube 213 .

The end tube 213 is opened at the front and is inserted into the span tube 220 in an interference fit manner and fixed. In addition, the end tube 213 has an elastic force so that the lock nut 232 can be inserted and fixed.

The end tube 213 has the same shape as the shape of the span tube 220 and has a curved side surface 213c and a rear surface 213b which is an upright plate material and a rear surface 213b at the side surface 213c, And a plurality of incision grooves 213a that are formed so as to be extended to the distal end portion 213a.

The side 213c is in contact with the inner surface of the span tube 220 while being drawn inward of the span tube 220.

The back surface portion 213b seals the span tube 220 so as to block the influx of moisture or other foreign substances. Here, the back surface portion 213b and the side surface portion 213c are integrally formed and formed.

The cutout groove 213a extends from the side portion 213c to the backside portion 213b. For example, the cutout groove 213a is contracted when pressure is applied from the inner surface of the span tube 220 when the end tube 213 is inserted into the span tube 220. [

The cutout groove 213a is expanded and contracted when the clamping nut 232 is inserted into the guide tube 212 so that the clamping nut 232 is extended to facilitate the pulling of the clamping nut 232. After the clamping nut 232 is pulled Apply pressure and tighten as it contracts.

That is, the cutting groove 213a generates an elastic force to the end tube 213 to be fixed inside the span tube 220, and generates an elastic force to enable the insertion and fixing of the clamping nut.

The guide tube 212 is a hollow tube and extends from the front surface of the end tube 213 toward the back surface 213b to guide the fastening bolt 231 and the fastening nut 232 to be connected to each other. For example, the fastening bolt 231 is pulled from the front side through the coupling hole 144a of the body coupling portion 144, the fastening nut 232 is pulled from the back portion 213b (rear side) (Not shown).

Preferably, the guide tube 212 is formed so that the diameters of the front side and the rear side are different from each other. More preferably, the shape of the fastening nut 232 may be a depressed shape so that the fastening nut 232 may be inserted from the rear side of the guide tube 212. In other words, when the fastening nut is formed in the shape of a bottle and has an opened inlet through which the fastening bolt 231 is inserted and a threaded body is formed on the inner surface, the guide tube 212 is inserted into the body of the fastening nut 232 And has a depressed shape capable of accommodating the light emitting diode.

Preferably, the guide tube 212 further includes a release preventing groove 212a which protrudes inward from the side where the coupling nut is inserted. Referring to FIG. 7, the release preventing groove 212a is protruded from the inner surface of the inlet side of the guide tube 212 to prevent the lock nut 232 from coming off.

Therefore, the tightening nut 232 is fixed at the inside of the guide tube 212 by the pressure caused by the contraction of the incision groove 213a and the engagement of the escape prevention groove 212a.

The radiation plate 211 extends in symmetrical and / or asymmetrical directions in the up, down, left, and right directions about the guide tube 212 and is connected to the inner surface of the side portion 213c. The radiation plate 211 reinforces the strength of the end tube 213 as it extends from the outer surface of the guide tube 212 located at the center of the end tube 213 to the inner surface of the side portion 213c.

At least one of the radiating plates 211 is formed with a rotation preventing hole 211a so as to prevent the coupling part 210 from being rotated inside the span tube 220.

The rotation preventing bolt 231 'drawn out through the rotation preventing hole 144b of the main body coupling part 144 is fastened to the rotation preventing hole 211a. The rotation prevention bolt 231 'prevents the coupling part 210 from being rotated inside the span tube 220 by connecting the body coupling part 144 and the coupling part 210.

The present invention includes the above-described configuration. Hereinafter, the operation and effect of the present invention will be described with reference to FIGS. 1 to 8. FIG.

The long span 200 structure is formed by connecting a plurality of spans 200 to a single bolt 100 to assemble a unit truss 800 and connecting a plurality of assembled unit trusses 800 together.

Accordingly, the operator first assemble the unit truss 800 by connecting a plurality of spans 200 to one bolt 100. Herein, the bolt joint 100 is formed of a polygonal body 140 so as to improve the torsional strength which can resist the twisting applied to the bolt 100 by the movement of a plurality of connected spans 200. [ The spans 200 are fastened in a mutually equiangular direction.

That is, the bolt 100 according to the present invention includes six upright walls 142 forming a hexagonal outer surface of the hexagonal body 140, and three of the upright walls 142 not adjacent to each other A span (200) is connected to upstanding wall (142). At this time, a total of three upright walls and a span 200 connected thereto are installed and connected to each other in an equiangular direction.

The operator inserts the fastening nut 232 at the rear of the guide tube 212 and fastens the end tube 213 to the end of the span tube. At this time, the cutout groove 213a is contracted and closely attached to the inner surface of the end portion of the span tube 220, and is then fixed by elastic force.

Alternatively, the end tube 213 may be fixed to the end of the span tube 220 by an elastic force as described above, but may be further welded. At this time, the end tube 213 may be welded inside the welded step (not shown) formed on the inner surface of the end portion of the span tube 220. The welding jaw (not shown) is welded closely to the rim of the end face of the end pipe, thereby increasing the welding strength of the end pipe and the span pipe, and preventing the dimension defect.

Thereafter, the operator brings the front surface of the end tube 213 into close contact with the main body coupling portion 144 side of the main body 140. At this time, the guide tube 212 and the coupling hole 144a are mutually aligned, and the main body coupling portion 144 and the rotation preventing holes 144b and 211a of the coupling portion 210 are aligned with each other.

The worker inserts the fastening bolt 231 into the fastening hole 144a from the inside of the main body 140 and the rotation preventing bolt 231 'into the rotation preventing hole 144b. Accordingly, the fastening bolt 231 is fastened to the inside of the fastening nut 232 through the fastening hole 144a and the guide pipe 212. The rotation prevention bolt 231 'is inserted into the rotation prevention hole 211a provided in any one of the radiation plates 211 of the coupling portion 210 through the rotation prevention hole 144b of the body coupling portion 144 .

Accordingly, the coupling part 210 is connected to the main body coupling part 144 of the main body 140 and is prevented from rotating.

In this manner, a total of three spans 200 are connected to one boltus in a mutually conforming direction, and each span 200 is connected to another bolus to form a unit truss structure. In addition, the above-described assembling procedure is not limited to the description, and various applications are possible according to the operator and / or the operator.

Thereafter, when three spans 200 are connected to the main body 140 of the total hexagonal shape, the operator tightens the cover 110 to the top of the main body 140 to seal the main body 140. The upper fixing protrusion 143 protruding upward from the upper end of each upright wall 142 has an assembling groove 123 as a spaced space between the lower fixing tab 124 of the cover plate 121 and the supporting rib 122, . The lower fixing tab 124 of the cover 120 is in close contact with one surface of the upper fixing tab 143.

The worker completes the assembly of the main body 140 and the cover 120 by connecting the fixing bolts 110 to the assembly female thread 141a formed on the lower plate 141 of the main body 140 through the upper fixing hole 121a do.

That is, according to the present invention, since the cover 120 having the lower fixing jaw 124 is fastened to the main body 140 having the upper fixing jaw 143, moisture can be prevented from flowing from the outside. In addition, the present invention can be assembled by fastening between a fastening part 144 and a fastening part 210 by having an end tube 213 having a cutting groove formed therein and a fastening nut incorporated therein. Such a fastening method facilitates the connection process between the main body 140 and the span 200, and can shorten the working time.

The embodiments of the collet chuck type assembled structure of the present invention described above and the truss fastening structure using the same are merely illustrative, and any person skilled in the art will understand from the description thereof It will be appreciated that various modifications and equivalent embodiments are possible.

Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: Boltless 110: Fixing bolt
120: cover 121: cover plate
121a: upper fixing hole 122: supporting rib
123: Assembly groove 124: Lower fixing jaw
140: main body 141: bottom plate
141a: Assembly female thread 142: Upper wall
143: upper fixing chuck 144: main body coupling portion
144a: coupling ball 144b: anti-rotation ball
200: span 210: fastening part
211: Radiation plate 211a: Anti-rotation ball
212: guide tube 213: end tube
213a: incision groove 213b:
213c side portion 220: span tube
230: fixing part 231: fastening bolt
231 ': rotation prevention bolt 232: fastening nut
800: Unit Truss 810: Shell

Claims (8)

A plurality of spans having a fastening portion fixed to the tip of the span tube extending in one direction;
(140) having a main body coupling part connected to the span as at least one of a plurality of upright walls erected at each side so as to form a space in which a bottom surface is formed inside;
A cover 120 for sealing the upper portion of the main body 140; And
And a fixing bolt (110) for fixing the cover (120) and the main body (140)
The fastening portion is fixed to the main body coupling portion by a fastening bolt which is fastened at the tip of the span tube by an elastic force and inserted and communicated with the inside of the main body 140,
The body (140)
And an upper fixing jaw (143) protruded upward from an upper end of the upright wall (142) and fastened to a lower surface of the cover (120)
The cover (120)
A lower fixing protrusion 124 protruding downward along the sides of the lower fixing protrusion 143 so as to be in close contact with one surface of the upper fixing protrusion 143; And
And a plurality of support ribs 122 radially extending from the lower surface to reinforce the rigidity,
The lower fixing step 124 and the supporting rib 122 are spaced apart from each other to form an assembling groove 123 into which the upper fixing step 143 is inserted. Voltrus.
[2] The apparatus of claim 1,
A side end portion of the span tube being in close contact with an inner surface of the span tube, and a back surface portion of a plate member uprighted to close the span tube;
A guide tube formed of a hollow tube extending from the central portion of the end tube to the back side to insert the fastening bolt; And
And a plurality of radiating plates extending from the guide tube to the inner surface of the side of the end tube.
3. The boltless type bolt of claim 2, further comprising: a collet chuck type assembling structure including a coupling nut that is fastened to the fastening bolt on the inside of the guide tube.
The apparatus of claim 3, wherein the guide tube
Further comprising a release preventing groove protruding from an inner side surface of the inlet so as to prevent the release of the clamping nut.
The endoscope according to claim 2, wherein the end tube
And a plurality of cutting grooves formed in the back surface portion of the guide pipe, the cutting grooves extending in the side portions.
delete [2] The apparatus of claim 1, wherein the main body coupling portion and the coupling portion
And a rotation preventing hole communicating with the rotation preventing bolt are formed on the bottom surface of the bolt.
A unit truss in which a plurality of the spans are connected to each other in a mutually equiangular direction to form a polygonal shell at the central portion; And
And a long span structure in which the unit truss is combined with a plurality of unit trusses, the truss fastening structure using a boltless assembly having a collet chuck type assembling structure.

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