KR20100097932A - Coupling unit using double screw - Google Patents

Coupling unit using double screw Download PDF

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Publication number
KR20100097932A
KR20100097932A KR1020090016827A KR20090016827A KR20100097932A KR 20100097932 A KR20100097932 A KR 20100097932A KR 1020090016827 A KR1020090016827 A KR 1020090016827A KR 20090016827 A KR20090016827 A KR 20090016827A KR 20100097932 A KR20100097932 A KR 20100097932A
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KR
South Korea
Prior art keywords
thread
reverse
rod
fastening rod
coupling
Prior art date
Application number
KR1020090016827A
Other languages
Korean (ko)
Inventor
신용권
Original Assignee
범아건설 주식회사
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Publication date
Application filed by 범아건설 주식회사 filed Critical 범아건설 주식회사
Priority to KR1020090016827A priority Critical patent/KR20100097932A/en
Publication of KR20100097932A publication Critical patent/KR20100097932A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/06Turnbuckles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00Features common to bolt and nut
    • F16B33/02Shape of thread; Special thread-forms
    • F16B2033/025Shape of thread; Special thread-forms with left-hand thread

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

PURPOSE: A coupling unit using double screw is provided to connect and to separate two members by rotating a combining nut only without rotation of the two members. CONSTITUTION: A coupling unit using double screw comprises a forward combining rod(110), a backward combining rod(120), and a combining nut(130). The forward combining rod comprises a forward screw(112). A thread is formed on one side of the forward screw. The backward combining rod comprises a backward screw(122). A backward screw having the thread of the opposite direction to the forward screw is formed on one side of the backward screw. A circular hole is formed in the combining nut. A forward thread is formed on the inner circumference of one side of the combining nut in a direction corresponding to the forward screw and is combined with the forward screw. A backward thread is formed on the inner circumference of the other side of the combining nut in a direction corresponding to the backward screw and is combined with the backward screw. The outer circumference of the combining nut is formed into a polygon.

Description

Coupling unit using double screw}

The present invention relates to a coupling device for connecting two members to generate a bonding force or a tensile force.

1 is a partial cross-sectional view showing the structure of a conventional coupling unit.

As shown in the drawing, a conventional coupling unit includes a fastening rod having a threaded portion formed at both sides or one side thereof, and a fastener formed with a thread that can be screwed by inserting the threaded portion.

At this time, the outer peripheral surface of the fastener is formed in a polygon to rotate the fastener using a tool such as a wrench to couple the fastening rod.

Looking at the coupling process of the coupling unit according to the prior art, first coupling one fastening rod and the fastener. After that, the other fastening bar is coupled to the opposite side of the fastener to engage.

However, the prior art as described above has the following problems.

That is, the fastening rods must be combined separately one by one, and when the second rod is coupled, the coupling process becomes complicated because the fastening rod is coupled to one of the fastening rods or the fastening rods that are not fastened. There was a problem that construction is difficult.

In the coupling unit according to the related art, when the end of the coupling rod to be coupled is fixed to prevent rotation, there is a problem in that both members cannot be fastened.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to be coupled to each coupling nut by rotating the coupling nut in one direction with respect to both members to be coupled. It is to provide a coupling unit.

According to a feature of the present invention for achieving the object as described above, the double screw unit according to the present invention includes a fastening rod in the form of a circular rod formed with a forward thread formed with a thread (forward) on one side; A reverse rod having a circular rod shape having a reverse thread formed on one side thereof and a thread (reverse direction) opposite to the thread of the forward screw; A circular hole is formed therein, and one side inner circumferential surface is formed with a forward thread in a direction corresponding to the forward threaded portion so as to be coupled with the forward threaded portion, and another side inner circumferential surface is formed in a direction corresponding to the reverse threaded portion to engage with the reverse threaded portion. A reverse thread is formed and the outer nut has a coupling nut formed in a polygon.

In addition, the present invention is a fastening rod in the form of a circular rod formed with a forward thread formed with a thread (forward) on one side; A reverse rod having a circular rod shape having a reverse thread formed on one side thereof and a thread (reverse direction) opposite to the thread of the forward screw; A bidirectional fastening rod having a circular thread formed on one side thereof with a forward thread formed with a thread (forward direction), and a thread (reverse direction) formed with a thread opposite to the thread of the forward thread on the other side; A circular hole is formed therein, and one side inner circumferential surface is formed with a forward thread in a direction corresponding to the forward threaded portion so as to be coupled with the forward threaded portion, and another side inner circumferential surface with a mesh direction corresponding to the reverse threaded portion to be coupled with the reverse threaded portion. It includes a double screw coupling unit is formed with a reverse thread is formed, including a coupling nut whose outer peripheral surface is formed into a polygon.

At this time, the coupling nut, the forward thread is formed on one side with respect to the center; The reverse thread may be formed on the other side.

In addition, an insertion groove is formed in a central inner circumference of the coupling nut, and the insertion groove includes an elastic member for elastically supporting the ends of the forward fastening rod and the reverse fastening rod when the forward fastening rod and the reverse fastening rod are coupled to each other. May be

In addition, the forward thread is formed to a diameter smaller than the forward fastening rod; The reverse thread portion is formed to have a smaller diameter than the reverse fastening rod; Diameters of the forward fastening rod and the reverse fastening rod are the same; The maximum diameter of the coupling nut may be formed smaller than or equal to the diameter of the forward (reverse) fastening rod.

At this time, the coupling nut, the outer peripheral surface of the cylindrical portion is formed on both sides, between the cylindrical portion of both sides may be formed a polygonal portion of the polygonal outer peripheral surface.

On the other hand, the diameter of the cylindrical portion, the forward fastening rods and the reverse fastening rods are the same, the outer peripheral surface may be continuous when the coupling nut is combined with the forward fastening rods and the reverse fastening rods.

And the maximum diameter of the polygonal portion, may be formed smaller than or equal to the diameter of the cylindrical portion.

On the other hand, the present invention is a coupling hole is formed in the inner side, the forward fastening rods in the form of a circular rod formed with a forward threaded portion formed with a screw thread (forward direction) inside the coupling hole; A reverse rod formed in a circular rod shape having a coupling hole formed in an inner side thereof, and having a reverse thread formed in a thread (reverse direction) opposite to a screw thread of the forward screw portion inside the coupling hole; And at one side, a forward threaded rod having a forward thread formed in a direction corresponding to the forward threaded portion to be coupled to the forward threaded portion; A reverse thread bar having a reverse thread formed in a direction corresponding to the reverse thread part so as to engage with the reverse thread part on the other side; It may be configured to include a double screw coupling unit comprising a coupling nut formed between the forward screw rod and the reverse screw rod is formed with a nut having an outer peripheral surface of the polygon.

At this time, the forward screw rod and the reverse screw rod is formed in a different diameter: the coupling hole of the forward fastening rod is a diameter corresponding to the diameter of the forward screw rod, and the coupling hole of the reverse fastening rod to a size corresponding to the diameter of the reverse screw rod, respectively It may be formed.

And the maximum diameter of the outer peripheral surface of the nut portion may be formed less than or equal to the diameter of the forward fastening rod or the reverse fastening rod.

In the double screw coupling unit according to the present invention as described above, the following effects can be expected.

That is, after placing both members (forward fastening rod and reverse fastening rod) to be joined at the end of the coupling nut, both members can be joined or separated by rotating the coupling nut in one direction, The process is simplified.

In the present invention, when the two members are coupled and separated, the member itself is not rotated, and only the coupling nut is rotated so that the coupling and separation are possible, even when the member to be coupled and separated is fixed (embedded concrete). There is an advantage that can be combined and separated.

In addition, the present invention has the advantage that it can be applied to a facility that wants to generate a tensile force on both members by pulling the two members in the opposite direction to combine.

Hereinafter, specific embodiments of the double screw coupling according to the present invention as described above will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a first embodiment of a double screw coupling according to the present invention, Figure 3 is a partial cross-sectional view showing a first embodiment of a double screw coupling according to the present invention, Figure 4 is a present invention Is a perspective view showing a second embodiment of the double screw coupling according to the present invention, FIG. 5 is a perspective view showing a bidirectional fastening rod constituting the second embodiment of the double screw coupling according to the present invention, and FIG. Is a perspective view showing a third embodiment of a double screw coupling according to the present invention, and FIG. 7 is a perspective view showing a fourth embodiment of the double screw coupling according to the present invention, and FIG. 8 is a double screw coupling according to the present invention. 9 is a partial cutaway view showing a fifth embodiment of the present invention, and FIG. 9 is a partial cutaway view showing a sixth embodiment of a double screw coupling according to the present invention.

First, the first embodiment of the present invention will be described with reference to FIGS. 2 and 3.

As shown in FIG. 2, the first embodiment of the present invention includes a forward fastening rod 110 having a forward thread 112 formed at one side thereof. The forward thread 112 refers to a portion where a thread is formed at the end of the forward fastening rod 110.

In addition, the forward fastening rod 110 is formed in the form of a circular rod, as shown.

Meanwhile, the first embodiment of the present invention includes a reverse fastening rod 120 corresponding to the forward fastening rod 110. The reverse fastening rod 120 has a similar shape to the forward fastening rod 110, the reverse thread portion 122 is formed with a thread formed at the end. However, the thread of the reverse thread 122 has a direction opposite to the thread of the forward thread 112.

That is, the forward thread 112 and the reverse thread 122 is for distinguishing the direction of the thread. Thus, generally, in the art, a forward screw means a counterclockwise screw, but the thread of the forward thread 112 refers to a counterclockwise thread, and the thread of the reverse thread 122 refers to a clockwise thread. It doesn't mean it (that is, in different directions).

On the other hand, the first embodiment of the present invention comprises a coupling nut 130 for coupling the forward threaded portion 112 of the forward fastening rod 110 and the reverse threaded portion 122 of the reverse fastening rod 120. . The sphere of the coupling nut 130 will be described in detail with reference to FIG. 3.

3 shows an internal configuration of the coupling nut 130 in cross section.

As shown in the drawing, a forward thread 132 of a direction corresponding to a thread of the forward threaded part 112 is formed at one side of the coupling nut 130, and a thread of the reverse threaded part 122 is formed at the other side thereof. Reverse thread 134 is formed.

Therefore, as the coupling nut 130 is rotated in one direction, the forward fastening rod 110 and the reverse fastening rod 120 are inserted into or withdrawn from the coupling nut 130.

On the other hand, when the forward fastening rod 110 and the reverse fastening rod 120 is completely inserted and coupled to the inner central portion of the coupling nut 130, the forward fastening rod 110 and the reverse fastening rod ( An elastic member 136 for elastically supporting the end of the 120 is provided.

The elastic member 136 is for preventing the wear or excessive reaction force caused by the direct contact between the end of the forward fastening rod 110 and the end of the reverse fastening rod 120, preferably a circular ring or disc It may be formed in the form.

In addition, an insertion groove 138 into which the elastic member 136 may be inserted is formed at the inner central portion of the coupling nut 130.

On the other hand, the other end of the forward fastening rod 110 and the reverse fastening rod 120 (that is, the side where the forward thread 112 or the reverse thread 122 is not formed) is various according to the application of the present invention It may be formed in the form.

For example, a ring may be formed to be fixed to a member to generate a tensile force, may be fixed to a specific member, or may be connected to a wire to generate a tensile force by the wire.

Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 4 and 5.

As shown in the second embodiment of the present invention, an embodiment for coupling a plurality of fastening rods using a plurality of coupling nuts.

Therefore, as shown in FIG. 4, the second embodiment of the present invention includes a forward fastening rod 210, a reverse fastening rod 220, a coupling nut 230, and a bidirectional fastening rod 240.

The forward fastening rod 210, the reverse fastening rod 220 and the coupling nut 230 is the forward fastening rod 110, the reverse fastening rod 120 and the coupling nut 130 in the first embodiment of the present invention Is the same as

That is, in the second embodiment of the present invention, the forward fastening rod 210 and the reverse fastening rod 220 which are the same as the first embodiment of the present invention are provided at both ends. In addition, one or more bidirectional fastening rods 240 are provided between the forward fastening rods 210 and the reverse fastening rods 220.

In addition, the forward fastening rod 210, the reverse fastening rod 220 and the bidirectional fastening rod 240 are each coupled by a coupling nut 230.

On the other hand, Figure 5 shows the structure of the bidirectional fastening rods 240 in detail. As shown in the drawing, the bidirectional fastening rod 240 has a forward thread part 242 corresponding to a forward thread 132 of the coupling nut 230 on one side thereof, and a reverse direction of the coupling nut 230 on the other side thereof. The reverse threaded portion 244 is formed corresponding to the thread 134.

The number of the bidirectional fastening rods 240 and the coupling nut 230 constituting the second embodiment of the present invention is not determined, but is appropriately determined according to the shape or length of the structure in which the present invention is installed.

Next, a third embodiment of the present invention will be described in detail with reference to FIG.

In the third embodiment of the present invention, as shown in FIG. 6, the diameter of the forward threaded portion 312 of the forward fastening rod 310 is formed to be different from the diameter of the forward fastening rod 310.

That is, as shown, the forward screw portion 312 is formed with a diameter smaller than the forward fastening rod 310.

Similarly, the reverse thread 322 is also formed in a smaller diameter than the reverse fastening rod (320). At this time, the diameter of the forward fastening rod 310 is preferably the same as the diameter of the reverse fastening rod (320).

On the other hand, the forward thread portion 312 and the reverse thread portion 322 is fastened to the coupling nut 330, the coupling nut 330 is the coupling nut 130 of the first embodiment and the second embodiment of the present invention described above Have the same structure as

However, the diameter of the coupling nut 330 is preferably the same as the diameter of the forward fastening rod 310 and the reverse fastening rod 320, that is, the forward fastening rod 310 and the reverse fastening rod 320 When fastening to the coupling nut 330, it is preferable that the corner portion of the coupling nut 330 does not protrude from the forward fastening rod 310 and the reverse fastening rod 320.

This is to ensure that the combination of the forward fastening rod 310, the reverse fastening rod 320 and the coupling nut 330 is formed in one rod shape.

Next, a fourth embodiment of the present invention will be described with reference to FIG.

The fourth embodiment of the present invention is provided with the forward fastening rods 410 and the reverse fastening rods 420 having the same structure as the forward fastening rods 310 and the reverse fastening rods 320 of the third embodiment of the present invention.

However, the fourth embodiment of the present invention has a coupling nut 430 having a structure different from that of the third embodiment of the present invention.

As shown, the coupling nut 430 of the fourth embodiment of the present invention is not formed in the entire outer peripheral surface of the polygon, both ends of the cylindrical cylindrical portion 432 is formed, both sides of the cylindrical portion ( Between the 432, a polygonal portion 434 having a polygonal outer circumferential surface is formed.

At this time, the diameter of the cylindrical portion 432 is preferably formed to be the same as the diameter of the forward fastening rod 410 and the reverse fastening rod 420, the diameter of the polygonal portion 434 is the cylindrical portion 432 It is preferably formed so as to be smaller than or equal to the diameter.

Accordingly, the combination of the forward fastening rod 410, the reverse fastening rod 420 and the coupling nut 430 has a more integral rod form than that of the third embodiment of the present invention, the forward screw portion 412 And a sufficient engagement length of the reverse threaded portion 422.

Next, a fifth embodiment of the present invention will be described in detail with reference to FIG. 8.

As shown, the fifth embodiment of the present invention comprises a rod-shaped fastening rod 510 formed with a coupling hole at one side end. A forward threaded portion 514 is formed on the inner circumferential surface of the coupling hole 512 in the forward fastening rod 510 as shown in the figure. At this time, the outer peripheral surface of the forward fastening rod 510 is the same as the above-described embodiment.

In addition, the fifth embodiment of the present invention includes a reverse fastening rod 520 of the form corresponding to the forward fastening rod 510. The reverse fastening rod 520 also has a coupling hole 522 is formed at one side end, the reverse screw portion 524 is formed in the opposite direction to the thread of the forward screw portion 512 in the coupling hole 522 Is formed.

In addition, the normal forward fastening rods 510 and the reverse fastening rods 520 are fastened to each other through the coupling nut 530. To this end, the coupling nut 530 is inserted into the coupling hole 512 of the forward fastening rod 510, the forward screw rod 532 to be coupled to the forward threaded portion 512, and the reverse fastening rod 520 Inserted into the coupling hole 522 of the reverse screw rod 534 to be coupled with the reverse screw portion 522 and the forward screw rod 532 and the reverse screw rod 534 to facilitate tightening The outer peripheral surface is comprised including the nut part 536 formed in polygon.

Threads corresponding to the threads of the forward threaded portion 514 are formed on the outer circumferential surface of the forward threaded rod 532, and threads of the direction corresponding to the threads of the reverse threaded portion 524 are formed on the outer circumferential surface of the reverse threaded rod 534. Is formed.

On the other hand, the diameter of the nut portion 536 is preferably formed to be smaller than or equal to the diameter of the forward fastening rods 510 and the reverse fastening rods 520 so that the combined rods can function as an integral rod. .

Hereinafter, a sixth embodiment of the present invention will be described with reference to FIG. 9.

As shown in Fig. 6, the sixth embodiment of the present invention has the same configuration as the fifth embodiment of the present invention described above.

However, the diameters of the forward threaded rod 532 'and the reverse threaded rod 534' are different from each other. Accordingly, the sizes of the coupling holes 512 'of the forward fastening rod 510 and the coupling holes 522' of the reverse fastening rod 120 are also different.

This is to facilitate the separation of the forward fastening rod 510 and the reverse fastening rod 520, to facilitate the work of the operator.

Hereinafter will be described the scope of application of the present invention.

First, the double screw coupling unit according to the present invention can be used for a member for generating a tensile force. In this case, the ends of the forward fastening rod and the reverse fastening rod are respectively fixed to the member to generate the tensile force. Ends of the forward fastening rods and the reverse fastening rods may be formed in various forms for fixing.

In addition, the double screw coupling unit according to the present invention may be used to generate a bonding force for joining the members. That is, the rod may be combined to produce a rod having a long length, or may be coupled to the ends of the forward fastening rods and the reverse fastening rods by using a double screw coupling unit according to the present invention. .

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

The present invention relates to a coupling device for generating a bonding force or a tensile force by connecting two members, according to the present invention, after placing both members (forward fastening rod and reverse fastening rod) to be joined at the end of the coupling nut By rotating the coupling nut in one direction, both members can be combined or separated, thereby simplifying the coupling and separation process.

1 is a partial cross-sectional view showing the structure of a conventional coupling unit.

2 is a perspective view showing a first embodiment of a double screw coupling according to the present invention;

Figure 3 is a partial cross-sectional view showing a first embodiment of a double screw coupling according to the present invention.

4 is a perspective view showing a second embodiment of a double screw coupling according to the present invention;

5 is a perspective view showing a bidirectional fastening rod constituting a second embodiment of a double screw coupling according to the present invention.

6 is a perspective view showing a third embodiment of a double screw coupling according to the present invention;

7 is a perspective view showing a fourth embodiment of a double screw coupling according to the present invention;

8 is a partial cutaway view showing a fifth embodiment of a double screw coupling according to the present invention;

9 is a partial cutaway view showing a sixth embodiment of a double screw coupling according to the present invention;

* Description of the symbols for the main parts of the drawings *

110, 210, 310, 410, 510: forward fastening rod

112, 212, 312, 412, 514: Forward thread

120, 220, 320, 420, 520: Reverse fastening rod

122, 222, 322, 422, 524: reverse thread

130, 230, 330, 430, 530: coupling nut

Claims (11)

Forward fastening rods in the form of a circular rod formed with a forward threaded portion formed with a thread (forward direction) on one side; A reverse rod having a circular rod shape having a reverse thread formed on one side thereof and a thread (reverse direction) opposite to the thread of the forward screw; And A circular hole is formed inside, One side inner peripheral surface is formed with a forward thread in a direction corresponding to the forward threaded portion to be coupled to the forward threaded portion, A reverse thread is formed on the other inner circumferential surface in a direction corresponding to the reverse screw part so as to engage with the reverse thread part. A double screw coupling unit, characterized in that the outer peripheral surface comprises a coupling nut formed in a polygon. Forward fastening rods in the form of a circular rod formed with a forward threaded portion formed with a thread (forward direction) on one side; A reverse rod having a circular rod shape having a reverse thread formed on one side thereof and a thread (reverse direction) opposite to the thread of the forward screw; A bidirectional fastening rod having a circular thread formed on one side thereof with a forward thread formed with a thread (forward direction), and a thread (reverse direction) formed on the other side with a thread opposite to the thread of the forward thread; And A circular hole is formed inside, One side inner peripheral surface is formed with a forward thread in a direction corresponding to the forward threaded portion to be coupled to the forward threaded portion, A reverse thread is formed on the other inner circumferential surface in a mesh direction corresponding to the reverse thread to engage with the reverse thread. A double screw coupling unit, characterized in that the outer peripheral surface comprises a coupling nut formed in a polygon. The method according to claim 1 or 2, The coupling nut, The forward thread is formed on one side of the center; Double screw coupling unit characterized in that the reverse side thread is formed on the other side. The method of claim 3, wherein Insertion grooves are formed in the center inner circumference of the coupling nut, In the insertion groove, And a resilient member for elastically supporting the ends of the forward fastening rod and the reverse fastening rod when the forward fastening rod and the reverse fastening rod are coupled to each other. The method of claim 1, The forward thread part is formed to a diameter smaller than the forward fastening rod; The reverse thread portion is formed to have a smaller diameter than the reverse fastening rod; Diameters of the forward fastening rod and the reverse fastening rod are the same; And a maximum diameter of the coupling nut is smaller than or equal to the diameter of the forward (reverse) fastening rod. The method of claim 1, The coupling nut, Cylindrical parts having a circular outer circumferential surface are formed on both sides, Double-coupling unit, characterized in that the polygonal outer circumference is formed between the cylindrical portion of both sides. The method of claim 6, Double cylinder coupling unit, characterized in that the cylindrical portion, the forward fastening rod and the reverse fastening rod are formed in the same diameter, the outer peripheral surface is continuous when the coupling nut is combined with the forward fastening rod and the reverse fastening rod. The method of claim 7, wherein And a maximum diameter of the polygonal portion is smaller than or equal to the diameter of the cylindrical portion. A forward fastening rod having a circular hole in which a coupling hole is formed in the inner side, and a forward threaded portion in which a thread (forward direction) is formed in the coupling hole; A reverse rod formed in a circular rod shape having a coupling hole formed in an inner side thereof, and having a reverse thread formed in a thread (reverse direction) opposite to a screw thread of the forward screw portion inside the coupling hole; And A forward threaded rod having a forward thread formed in a direction corresponding to the forward threaded portion so as to be coupled to the forward threaded portion at one side; A reverse thread bar having a reverse thread formed in a direction corresponding to the reverse thread part so as to engage with the reverse thread part on the other side; And a coupling nut having a nut portion having a polygonal outer circumferential surface between the forward threaded rod and the reverse threaded rod. The method of claim 9, The forward thread and the reverse thread are formed with different diameters: The coupling screw of the forward fastening rod is a diameter of the forward screw rod, and the coupling screw of the reverse fastening rod is a double screw coupling unit, characterized in that formed in a size corresponding to the diameter of the reverse thread, respectively. 11. The method according to claim 9 or 10, And a maximum diameter of an outer circumferential surface of the nut part is smaller than or equal to a diameter of the forward fastening rod or the reverse fastening rod.
KR1020090016827A 2009-02-27 2009-02-27 Coupling unit using double screw KR20100097932A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101447198B1 (en) * 2014-07-18 2014-10-06 김미희 Precast pad mount of under the ground a cable
KR101448140B1 (en) * 2014-06-11 2014-10-08 동재감리 주식회사 Underground Electroic Line Connector
KR101448171B1 (en) * 2014-06-12 2014-10-10 주식회사 정림이엔씨건축사사무소 Ground installation switchboard for undergraund distribution line
KR101968531B1 (en) * 2018-11-23 2019-04-29 (주)양지 Apparatus for measuring bridge deflection and system having the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101448140B1 (en) * 2014-06-11 2014-10-08 동재감리 주식회사 Underground Electroic Line Connector
KR101448171B1 (en) * 2014-06-12 2014-10-10 주식회사 정림이엔씨건축사사무소 Ground installation switchboard for undergraund distribution line
KR101447198B1 (en) * 2014-07-18 2014-10-06 김미희 Precast pad mount of under the ground a cable
KR101968531B1 (en) * 2018-11-23 2019-04-29 (주)양지 Apparatus for measuring bridge deflection and system having the same

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