KR101425340B1 - Caterpillar, Clamp and Manufacturing Apparatus for Prefabricated Parallel Wire Strand for Suspension Bridge using thereof - Google Patents

Abstract

The present invention relates to a manufacturing apparatus for a prefabricated parallel wire strand for suspension bridge (PPWS) and to a caterpillar which is an apparatus of withdrawing the PPWS using an upper and lower part clamp, the clamp, and a manufacturing apparatus for the PPWS using the same. Provided is the caterpillar comprising: a first caterpillar band provided with a drive shaft on one side, provided with a driven shaft on the other side, and rotated in one direction; a second caterpillar band provided with the drive shaft on one side, provided with the driven shaft on the other side, rotated in the other direction, and disposed at one direction of the first caterpillar band; a first clamp projected from the outer peripheral surface of the first caterpillar band and surrounding one end of a strand; a second clamp projected from the outer peripheral surface of the second caterpillar band and surrounding other end of the strand; and a drive motor connected to at least one among the drive shafts of the first caterpillar band and the second caterpillar band and rotating the drive shaft.

Description

TECHNICAL FIELD [0001] The present invention relates to a caterpillar, a clamp, and a hexagonal section wire strand manufacturing apparatus for use in the apparatus for manufacturing a hexagonal section wire strand for a suspension bridge,

The present invention relates to a cantilever, a clamp, and a PPWS using the upper and lower clamps, which is a device for pulling out PPWS using an upper and a lower clamp, in an apparatus for manufacturing a prefabricated Parallel Wire Strand for Suspension Bridge (hereinafter abbreviated as "PPWS" To a manufacturing apparatus.

There is PPWS method as a method of laying cable of suspension bridge. In this PPWS method, a plurality of steel wires are arranged so as to be arranged in parallel without intersecting each other, and PPWS made of bundles each having a hexagonal cross-section is fabricated. After a plurality of PPWSs are laid, the plurality of PPWSs are bundled, Of the cable. Compared with the AS (Air Spinning) method, it has the advantage of easy quality control, easy hypothesis, and less influence of climate environment.

With respect to PPWS, Figure 1 shows a schematic partial perspective view of a PPWS used for cable suspension of a suspension bridge. In order to use the PPWS method for suspension bridge cable construction, as shown in FIG. 1, a plurality of steel wires 101 are gathered in a state of being arranged in parallel without intersecting each other, and the steel wires 101 are gathered to form a hexagonal section PPWS 100 in the form of a bundle is produced at a factory. At this time, the steel wire 101 may be bundled with the focusing tape 103 so that the steel wires 101 maintain a hexagonal section. 2 is a schematic diagram showing PPWS. 2, the PPWS 100 may be produced as wound on a reel or roller 104, and may be provided with a socket 102 at both ends.

This PPWS can be made up of 127 steel wires in the case of suspension bridges, depending on the size of the bridge. These steel wires are transported to the fabrication position while being wound on the wire reel, and PPWS is produced in such a manner that the steel wires are pulled out one by one from a plurality of wire reels on the flat surface and concentrated. Such a wire reel is mounted on a wire swivel and is configured to be rotatable in a plane so that the steel wire wound around the wire reel can be easily drawn out.

Regarding the PPWS producing apparatus, Fig. 3 is a schematic diagram showing the PPWS producing apparatus. 3, the PPWS production apparatus 1 includes a wire swift 10, a screen 200, an assembler 300, a cater 400, a guide roller 500, a taping machine, a reeling machine 600, , And a socketing workbench.

4 is a front view showing a conventional caterpillar, and Fig. 5 is a front view showing a conventional clamp. As shown in FIGS. 4 and 5, the cater 400 may include two drive motors 420. The caterpillar 400 may be configured such that the upper and lower two caterpillar structures rotate in different directions and at the same speed as shown. Further, each caterpillar structure may be configured such that a clamp protrudes in a direction perpendicular to the outer surface of the steel plate.

Regarding the problems that may occur at this time, hereinafter, PPWS that is not completed is referred to as a strand 104 for convenience. Fig. 6 is a schematic view showing a clamp displacement generated by a conventional caterpillar, and Fig. 7 is a schematic diagram showing a stranding phenomenon caused by a conventional caterpillar. The upper and lower clamps 3 and 4 must be configured to be precisely tuned to each other. This is because multiple steel wires must be pulled out with the same force, since no tension is applied to a particular steel wire.
Although the marking portion is formed perpendicularly to the strand pull-in direction in the introduction portion of the strand 104 of FIG. 7, it can be seen that the marking portion is vertically inclined in the pull-out portion of the strand 104 of FIG. If the upper and lower clamps 3 and 4 are not correctly tuned, as shown in FIG. 7, the steel wires constituting the strands 104 are not all moved to the same position, but the lengths of the drawn wires are different.
Accordingly, if the degree of deviation of the upper and lower clamps 3 and 4 is large, damage or breakage of some of the steel wires occurs and the quality of the PPWS product deteriorates. Particularly, this causes problems in terms of quality, which is an advantage of PPWS, and can be a serious problem in the production of PPWS for high-strength suspension cable.

Patent No. 10-1000159 Patent No. 10-1296019 [0011]

Accordingly, the present invention has been made to solve the above-described problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a caterpillar, a clamp, and a PPWS production apparatus using the clamp, which is a device for pulling out a PPWS using a vertical clamp having a concavo-convex structure for preventing a strand from being pinched.

Hereinafter, specific means for achieving the object of the present invention will be described.

A first object of the present invention is to provide a caterpillar for pulling out a strand in an apparatus for producing PPWS which is a hexagonal section wire strand for suspension bridges having a drive shaft on one side and a slave shaft on the other side, A first caterpillar band rotating in one direction about its center; And a second caterpillar band disposed on one side of the first caterpillar band so as to be in contact with the first caterpillar band at one side thereof, wherein the first caterpillar band has a drive shaft on one side thereof and a follower shaft on the other side thereof, A second caterpillar band; A first clamp configured to protrude in a normal direction on the outer circumferential surface of the first caterpillar band and to surround one side of the strand drawn into one side of the first caterpillar band; A second clamp which protrudes in a normal direction on the outer circumferential surface of the second caterpillar band and surrounds the other side of the strand drawn into one side of the first caterpillar band; And a drive motor connected to the drive shaft of at least one of the first caterpillar band and the second caterpillar band to rotate the drive shaft, wherein the first clamp and the second caterp And a concavity and a convexity formed to correspond to each other when the first clamp and the second clamp are fastened to the strand.

The concavo-convex portion may include a semicircular concave portion; And a semicircular convex portion that is shaped to be in contact with the concave portion. When the concavo-convex portion is formed in a semicircular shape, there is an effect that the centering is automatically performed with a simple structure.

Further comprising a ring gear unit connected to the drive motor and connected to at least one of the first caterpillar band and the second caterpillar to be tuned and to transmit driving force from the drive motor, And the drive shaft of the first caterpillar band and the drive shaft of the second caterpillar band are rotated at the same angular velocity through the ring gear unit.

A second object of the present invention is to provide a clamp which is an embodiment of a caterpillar for pulling out a strand in an apparatus for producing a PPWS which is a hexagonal section wire strand for a suspension bridge, the caterpillar comprising a first caterpillar rotating in one direction, And a second caterpillar band disposed at one side of the first caterpillar band and rotated in the other direction to contact with the caterpillar band and protruding in a normal direction to the outer circumferential surface of the first caterpillar band, A first clamp surrounding one side of the strand that is drawn into one side of the strand; And a second clamp protruding in a normal direction on the outer circumferential surface of the second caterpillar band and surrounding the other side of the strand drawn into one side of the second caterpillar band, And a concavo-convex part which is provided so as to be opposed to each other on opposite sides and is configured to be mutually shaped when the first clamp and the second clamp are fastened to the strand .

The concavo-convex portion may include a semicircular concave portion; And a semicircular convex portion that is shaped to be in contact with the concave portion.

A third object of the present invention is to provide a wire reel to which a wire reel wound with a steel wire is mounted and which supplies the steel wire; An assembler for collecting a plurality of the steel wires drawn out from the plurality of wire swifts to form a strand; A caterpillar for fastening and drawing the strand constituted by the assembler with a plurality of clamps; A guide roller guiding movement of the strand drawn out by the caterpillar; A reeling machine for winding the strand drawn by the caterpillar onto a roller; And a socketing worktable for socketing and fixing one end of the strand, wherein the clamp of the caterpillar is constituted by a clamp according to an embodiment of the present invention. have.

The caterpillar further comprises: a first caterpillar band rotating in one direction; A second caterpillar band disposed at one side of the first caterpillar band and rotating in the other direction such that the first caterpillar band and the outer circumferential surface face each other; A ring gear unit connected to the drive shaft of the first caterpillar band and the second caterpillar band to transmit driving force; And a drive motor connected to the ring gear unit and transmitting a driving force to the ring gear unit, wherein the drive motor is provided with one, and the drive gears of the first caterpillar band and the second caterpillar band To rotate at the same angular velocity.

The fourth object of the present invention is to provide a PPWS production apparatus in which a plurality of steel wires are constituted by hexagonal cross-section strands, both ends of which are socketed and fixed, and which are manufactured by a PPWS production apparatus according to an embodiment of the present invention . ≪ / RTI >

As described above, the present invention has the following effects.

First, according to the present invention, it is possible to prevent the upper and lower clamps of the caterpillar from being displaced without complicated construction.

Secondly, according to the present invention, since no stranding phenomenon occurs, production time and manufacturing cost are reduced, and the quality of the PPWS product is improved.

Third, according to the present invention, deviation of the upper and lower clamps, which can be finely generated by a drive motor or the like, is also prevented, thereby improving the performance of the caterpillar.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a schematic partial perspective view of a PPWS used for cable installation of a suspension bridge,
2 is a schematic diagram showing a PPWS production apparatus,
3 is a schematic diagram showing a PPWS production apparatus,
4 is a front view showing a conventional caterpillar,
5 is a front view showing a conventional clamp,
6 is a schematic view showing a clamp displacement generated by a conventional caterpillar,
FIG. 7 is a schematic diagram showing stranding phenomenon generated by a conventional caterpillar,
Figure 8 is a front view of a caterpillar according to one embodiment of the present invention,
Figure 9 is a side view of a caterpillar according to one embodiment of the present invention;
10 is a front view showing a clamp of a caterpillar according to an embodiment of the present invention;
11 is a side view illustrating a clamp of a caterpillar according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following detailed description of the operation principle of the preferred embodiment of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.

<Caterpillar>

FIG. 8 is a front view of a caterpillar according to an embodiment of the present invention, and FIG. 9 is a side view of a caterpillar according to an embodiment of the present invention. 8 and 9, a cater 400 in accordance with an embodiment of the present invention may be comprised of an upper cater 402 and a lower cater 404. Each cater includes a caterpillar band 440, The clamps 3 and 4, the drive motor 420, and the frame 460. [

The caterpillar band 440 is a band or a belt connected to the drive motor 420 and rotating in one direction to constitute an endless track. A plurality of clamps 3 and 4 may be provided on the outer circumferential surface. The clamps 3,4 of the caterpillar band 440 are preferably equally spaced in the upper caterpillar 402 and the lower caterpillar 404. This is because the clamps 3 and 4 are preferably configured to be precisely tuned to one another. It is preferable that the caterpillar band 440 of the upper caterpillar 402 and the caterpillar band 440 of the lower caterpillar 404 are formed to have the same length and the same width as shown in Figs.

The caterpillar band 440 may include a drive shaft on one side and a slave axis on the other side and the drive shaft is driven by the drive motor 420 to drive the rotation of the caterpillar band 440, . The caterpillar band 440 may be configured to rotate in one direction, and may be in the form of a chain or plate. The outer circumferential surface of the caterpillar band 440 of the lower caterpillar 404 and the outer circumferential surface of the caterpillar band 440 of the upper caterpillar 4020 can be disposed so as to be symmetrical to each other.
The drive motor 420 is configured to drive the caterpillar band 440, and a drive motor such as an electric or hydraulic type can be used. The upper caterpillar 402 and the lower caterpillar 404 can be constituted separately by the drive motor 420 and the upper caterpillar 404 and the upper caterpillar 404 can be constructed by using one drive motor 420 and gear drive, horn drive, caterpillar drive, 402 and the lower caterpillar 404 at the same time. In the embodiment of the present invention, driving using the ring gear 480 is used. Gear drive is preferred to minimize drive tolerances of the upper caterpillar 402 and lower caterpillar 404. When one drive motor 420 is used, the error and rattling due to the backlash of gears and the like can be minimized by the concave and convex portions 5 and 6.

delete

The frame 460 may be configured to receive the upper and lower caterpillars and fix them to the ground.

The clamps 3 and 4 may be clamps provided with the recessed portions 5 and 6. In this regard, it will be described in detail below.

If the upper caterpillar 402 is driven to rotate clockwise, the lower caterpillar 404 must be driven to rotate counterclockwise. As a result, the strands 104 between the upper caterpillar 402 and the lower caterpillar 404 are entrained by the clamp. Due to the configuration of the caterpillar 400, approximately 128 steel wires of the PPWS production apparatus of about 200 m in total need to be drawn out, so that a considerable compressive force is required. According to the caterpillar 400 according to one embodiment of the present invention, the strand 104 may be configured to be drawn at a speed of 22.86 m / min.

<Clamp>

FIG. 10 is a front view of the clamp of the caterpillar according to the embodiment of the present invention, in which FIG. 8A is enlarged and FIG. 11 is a front view of the clamp of the caterpillar according to the embodiment of the present invention, Fig. 10 and 11, the clamps 3 and 4 of the caterpillar 400 according to the embodiment of the present invention have the concave and convex portions 5 and 6 and the strands 104 penetrating on one side thereof, (7, 8) in close contact with the outer surface of the caterpillar (400), and fastening means (9) for engagement with the caterpillar (400). Reference numeral 3 may refer to a clamp of the upper caterpillar 402, and reference numeral 4 may refer to a clamp of the lower caterpillar 404.

The clamps 3 and 4 are configured to protrude in the vertical direction on the outer surface of the steel plate or caterpillar band of the caterpillar 400 and are provided on the upper clamp 3 and the lower caterpillar 404 provided in the upper caterpillar 402 The lower clamp 4 is configured to face each other and can be configured to precisely tune. The clamps 3 and 4 are locked at one side of the caterpillar 400 into which the strand is introduced and the clamps 3 and 4 are opened at the other side from which the strand is discharged. The most problematic point at the time of manufacturing the caterpillar 400 and the clamps 3 and 4 is whether or not the strands 104 composed of a plurality of wire wires 101 can be united together.

The strands 104 are brought into close contact with the spaces generated by the tight fitting portions 7 and 8 while being constructed such that the tight fitting portion 7 of the upper clamp 3 and the tight fitting portion 8 of the lower clamp 4 are opposed to each other The strand 104 is moved in one direction by the driving motor 420 of the cater 400 while closely adhering thereto, so that the strand 104 is drawn out in one direction. The tight contact portions 7 and 8 on the one side of the caterpillar 400 are brought close to each other so as to face each other and the tight contact portions 7 and 8 on the other side of the caterpillar 400 are separated from each other. It is required to be in close contact with the hexagonal section strands 104 so that the tight fitting portions 7 and 8 are formed in a half hexagonal shape and a hexagonal shape can be formed when the clamps 3 and 4 are filled.

The fastening means 9 is a structure for coupling the caterpillar 400 and the clamps 3, 4. A fastening means such as a rivet, a bolt, or the like may be used, and various kinds of welding and the like may be used.

Regarding the concave and convex portions 5 and 6, the clamp according to the embodiment of the present invention is further provided with concave and convex portions 5 and 6 as compared with the conventional art. The concave and convex portions 5 and 6 may be provided on one side of the clamps 3 and 4 and are preferably provided on one side of the clamping portions 7 and 8 for adhesion of the clamps 3 and 4 and the strands 104, It is preferable that the portions 5 and 6 are provided.

The concave and convex portions 5 and 6 may be semicircular or polygonal. Convex portions 6 protruding from the upper clamp 3 or the lower clamp 4 may be provided. The clamp on the opposite side of the clamp provided with the protruding portion 6 may be provided with a concave portion 5 shaped to be in conformity with the protruding portion 6. Since the clamps 3 and 4 are compressed together, the projections and depressions 5 and 6 can be damaged in the case of polygons. Therefore, a semicircular shape that can be smoothly shaped is preferable.

According to these concave and convex portions 5 and 6, when there is a slight tolerance between the upper clamp 3 and the lower clamp 4, such a tolerance is canceled when the clamps 3 and 4 are filled in the strands 104, So that it can be fitted to the other side. As a result, it is possible to implement a self-aligning clamp without any separate precision equipment. The precise caterpillar 400 can be easily realized by the concave and convex portions 5 and 6 according to the embodiment of the present invention. There is a remarkable effect that the production is easy, the production cost is not large, and the continuous cost is not generated.

Also, as will be discussed below, when using one drive motor 420, errors and rattling due to the backlash of gears and the like can be minimized.

< PPWS  Production equipment>

3, the PPWS fabrication apparatus 1 includes a wire swift 10, a screen 200, an assembler 300, a caterpillar 400, and a crawler 400 according to an embodiment of the present invention. A guide roller 500, a taping machine, a reeling machine 600, a socketing workbench, and the like. At this time, the cater 400 according to an embodiment of the present invention may be configured as shown in the above and FIGS.

If the caterpillar 400 according to the embodiment of the present invention is used in the PPWS production apparatus, the upper and lower clamps of the caterpillar can be prevented from being displaced without complicated construction, The manufacturing cost is reduced, the quality of the PPWS product is improved, and the shift of the upper and lower clamps, which may be generated finely by the drive motor, is prevented, and the performance of the caterpillar is improved.

Especially, the effect related to the quality of PPWS can be a great help in the production of PPWS for suspension cable with a tensile strength of 1960 MPa or more.

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and from the equivalent concept are to be construed as being included in the scope of the present invention.

1: PPWS production device
3: Upper clamp
4: Lower clamp
5: lumbar
6: convection
7:
8:
9: fastening means
10: Wire Swift
100: PPWS
101: Steel wire
102: Socket
103: Focusing tape
104: Strand
200: Screen
300: assembler
400: Caterpillar
402: Upper caterpillar
404: Lower caterpillar
420: drive motor
440: Caterpillar band
460: frame
480: ring gear
500: guide roller
600: Relieving machine

Claims (8)

Claims [1] A cantilever for pulling a strand out of a production apparatus for PPWS which is a hexagonal-section wire strand for a suspension bridge,
A first caterpillar band having a drive shaft on one side and a slave axis on the other side and rotating in one direction about the drive shaft and the driven shaft;
And a second caterpillar band disposed on one side of the first caterpillar band so as to be in contact with the first caterpillar band at one side thereof, wherein the first caterpillar band has a drive shaft on one side thereof and a follower shaft on the other side thereof, A second caterpillar band;
A first clamp configured to protrude in a normal direction on the outer circumferential surface of the first caterpillar band and to surround one side of the strand drawn into one side of the first caterpillar band;
A second clamp which protrudes in a normal direction on the outer circumferential surface of the second caterpillar band and surrounds the other side of the strand drawn into one side of the first caterpillar band; And
A drive motor connected to the drive shaft of at least one of the first caterpillar band and the second caterpillar band to rotate the drive shaft;
Lt; / RTI &gt;
And a concavo-convex portion provided so as to correspond to one side of each of the first clamp and the second clamp facing each other and configured to be mutually shaped when the first clamp and the second clamp are fastened to the strand Lt; / RTI &gt;
The method according to claim 1,
The concavo-
Semicircular lumbar region; And
And a semicircular convex portion shaped to conform to the recess.
The method according to claim 1,
A ring gear unit connected to the drive motor and connected to at least one drive shaft of the first caterpillar band and the second caterpillar to be tuned and to transmit driving force from the drive motor;
Further comprising:
Wherein one of said drive motors rotates said drive shaft of said first caterpillar band and said drive shaft of said second caterpillar band at the same angular speed through said ring gear unit.
1. A clamp for constituting a caterpillar for pulling out a strand in an apparatus for manufacturing a PPWS which is a hexagonal section wire strand for suspension bridges,
Wherein the caterpillar includes a first caterpillar band that rotates in one direction and a second caterpillar band that is disposed on one side of the first caterpillar band and rotates in the other direction to abut on one side with the first caterpillar band,
A first clamp configured to protrude in a normal direction on the outer circumferential surface of the first caterpillar band and to surround one side of the strand drawn into one side of the first caterpillar band; And
A second clamp protruding in a normal direction on the outer circumferential surface of the second caterpillar band and surrounding the other side of the strand drawn into one side of the second caterpillar band;
/ RTI &gt;
And a concavo-convex portion provided so as to correspond to one side of each of the first clamp and the second clamp facing each other and configured to be mutually shaped when the first clamp and the second clamp are fastened to the strand .
5. The method of claim 4,
The concavo-
Semicircular lumbar region; And
And a semicircular protruding portion which is shaped to be in contact with the recessed portion.
A plurality of wire swifts mounted with a wire reel around which a steel wire is wound and supplying the steel wire;
An assembler for collecting a plurality of the steel wires drawn out from the plurality of wire swifts to form a strand;
A caterpillar for fastening and drawing the strand constituted by the assembler with a plurality of clamps;
A guide roller guiding movement of the strand drawn out by the caterpillar;
A reeling machine for winding the strand drawn by the caterpillar onto a roller; And
A socketing worktable for socketing and fixing one end of the strand;
Lt; / RTI &gt;
Wherein the clamp of the caterpillar comprises a clamp according to claim 4 or claim 5.
The method according to claim 6,
The caterpillar
A first caterpillar rotating in one direction;
A second caterpillar band disposed at one side of the first caterpillar band and contacting with the first caterpillar band and rotating in the other direction;
A ring gear unit connected to the drive shaft of the first caterpillar band and the second caterpillar band to transmit driving force; And
A driving motor connected to the ring gear unit and transmitting a driving force to the ring gear unit;
Lt; / RTI &gt;
Wherein one of the drive motors is provided to rotate the drive shaft of the first caterpillar band and the drive shaft of the second caterpillar band at the same angular velocity through the ring gear.
Characterized in that the PPWS product is made of a hexagonal cross-section strand into which a plurality of steel wires are bundled and both ends are socketed and fixed.

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