Wire puller for easy wire replacement

Abstract

A wire puller (2) for easy wire changing comprises a main frame (3), a winding wheel (4), a plurality of fastening elements (5), and a spring tube (6). The main frame (3) includes a stand (31), a handle (32), a mounting shaft (33), and a mounting bracket (34). The winding wheel (4) comprises a first half-wheel frame (41) and a second half-wheel frame (42). A winding area (43) is defined between the first half-wheel frame (41) and the second half-wheel frame (42) for receiving a pull wire (7), and the winding wheel (4) performs a free rotation by placing the sleeve (411) onto the mounting shaft (33). The plurality of fastening elements (5) are each attached to the first half-wheel frame (41) and the second half-wheel frame (42).The spring tube (6) is passed through and attached to the mounting bracket (34) at one end; the other end of it is provided for the other end of the pull wire (7), which is led out or pulled in when the winding wheel (4) rotates freely.

Description

AREA OF INVENTION

[0001] The invention relates to a wire puller and in particular to a wire puller for easy replacement of wires. BACKGROUND OF THE INVENTION

[0002] From publication JP 2005 - 178 917 A, a roller frame for rigid rods with a basket-like body is known, which is rotatably supported on a base by a support shaft. The rigid rod is wound around the roller frame in such a way that it encloses the support shaft, so that it is supplied sequentially by the roller frame. Skeleton rods are provided on the roller frame parallel to each other at suitable intervals in the direction of rotation. A regulating piece, the tip of which can engage or disengage between two skeleton rods by means of an elastic effect that overcomes the rigidity of the rod, is installed on a base part on the base. Publication FR 2 636 055 A1 describes an unwinder for semi-rigid plastic tubes, e.g., polyethylene tubes, which can be operated by a single person and enables the transport and handling of a coiled tube without risk of injury to the person.The unwinder comprises a handling frame equipped with a horizontal central shaft and on both sides of this shaft with a handling device and with a horizontal rolling and seating device, a holding cage in the form of a drum which is arranged so that it can move around the central shaft of the handling frame and whose inner diameter corresponds essentially to the outer diameter of the tube coil to be received, and a vertical disk which forms a cover which is placed over the end edges of the holding cage.

[0003] US Patent 3,052,425 A discloses a reel unwinder comprising a base plate, a sleeve extending upward from the base plate, and a spindle arranged within the sleeve. An upper and a lower plate form a reel support platform, with a plurality of radial arms extending outward between the two plates. The plates and arms are connected by bolts, and the reel is supported by the radial arms, the outer ends of which are bent upward to prevent displacement of the reel. The sleeve also provides means around which the reel windings contract as the tape material is drawn from the interior of the reel.

[0004] Referring to Fig. 1 comprises a wire drawer 1, a metal bracket 11, a winding wheel 12, and a spring tube 13. The metal bracket 11 includes a shaft 111, a handle 112 connected to the shaft 111 and located near one end thereof, and a lower base 113 connected to the other end of the shaft 111. The lower base 113 includes two base frames 114 and a fastening element 115, the two base frames 114 being positioned at opposite ends of the shaft 111 and the fastening element 115 being attached to the end of the shaft 111 not connected to the handle 112. An interior 116 is formed by the fastening element 115, which secures the two base frames 114 to the shaft 111, and the fastening element 115 is provided at its top with a guide rod 117. The winding wheel 12 is axially connected to the interior 116.The winding wheel 12 comprises an integral wheel frame 121 and a sleeve 122 connected to one side of the wheel frame 121. An inner area of ​​the wheel frame 121 is provided with a winding area 1211 corresponding to a draw wire 14, and one end of the draw wire 14 is fixed in the wheel frame 121, with the sleeve 122 being fitted over the shaft 111, allowing the winding wheel 12 to rotate freely. One end 131 of the spring tube 13 is guided through and attached to one end of the guide rod 117, and the draw wire 14 of the winding wheel 12 extends from one end 131 of the spring tube 13 to the other end 132 of the spring tube 13 to be sent out or retracted.

[0005] On a construction site, the wheel frame 121 is a single piece and cannot be immediately disassembled to replace the pull wire 14 with other wire types or lengths. This means that the pull wire 14 must first be pulled out of the wheel frame 121, and a required pull wire 14 must be inserted and pulled into the wheel frame 121, making the replacement process cumbersome and inconvenient. To save time on changing the pull wire 14, a user must therefore prepare several sets of pull wires 14 on wire pullers 1 with different specifications, wire types, and lengths. The metal bracket 11 of each set of wire pullers 1 is bulky and heavy, making it cumbersome to carry. SUMMARY OF THE INVENTION

[0006] A main objective of the invention is to provide a wire puller in which changing the wire is easy and a user can easily replace the pulling wire with different specifications, wire types and lengths.

[0007] To achieve the aforementioned objective, the invention provides a wire puller for easy wire replacement with the features according to claim 1, comprising a main frame, a winding wheel, a plurality of fastening elements, and a spring tube. The main frame includes a stand, a handle connected to the stand, a mounting shaft arranged horizontally between the stand and the handle, and a mounting bracket provided on one side of the mounting shaft.The winding wheel comprises a first half-wheel frame with a sleeve and a second half-wheel frame, which is assembled accordingly with the first half-wheel frame. A winding area is defined in an interior space between the first and second half-wheel frames, and the winding area is designed to receive a draw wire. One end of the draw wire is attached to the winding wheel, and the winding wheel is configured to perform free rotation by placing the sleeve onto the mounting shaft. A plurality of mounting elements are attached to both the first and second half-wheel frames. The spring tube passes through and is attached to the mounting bracket at one end, and the other end of the spring tube is designed to extend or retract the other end of the draw wire when the winding wheel is in free rotation.The pull wire can be easily replaced by disassembling or assembling the numerous fasteners and the second half-wheel frame.

[0008] Furthermore, the first half-wheel frame includes a first outer ring and a first inner ring. The diameter of the first inner ring is smaller than that of the first outer ring, and the first inner ring is located within a diameter range of the first outer ring. The first inner ring is arranged on a horizontal plane different from that of the first outer ring. The sleeve is connected to one side of the first inner ring and projects towards the second half-wheel frame. The sleeve has a projecting block at one end opposite the first inner ring. The projecting block, the first inner ring, and the sleeve communicate in a hollow form.The first half-wheel frame further comprises a plurality of first arcuate bars between the sleeve and the first outer ring, and the plurality of first arcuate bars are round bars, one end of each plurality of first arcuate bars is attached to one end of the sleeve, and another end of each plurality of first arcuate bars is attached to the first outer ring. The second half-wheel frame comprises a second outer ring and a second inner ring, and the diameter of the second inner ring is smaller than that of the second outer ring, and the second inner ring is located within a diameter range of the second outer ring, and the second inner ring is arranged on a horizontal plane different from that of the second outer ring.The second half-wheel frame further comprises a plurality of second arcuate bars between the second inner ring and the second outer ring and a plurality of first arcuate bars corresponding to the plurality of second arcuate bars, and the plurality of second arcuate bars are round bars and one end of each of the plurality of second arcuate bars is attached to the second inner ring, and another end of each of the plurality of second arcuate bars is attached to the second outer ring.

[0009] Furthermore, the first half-wheel frame comprises a first fastening sleeve which is attached to one of the plurality of first arc-shaped rods to secure one end of the pull wire.

[0010] Furthermore, the second half-wheel frame comprises a second mounting sleeve and a plurality of clips, the second mounting sleeve being attached to the second outer ring to secure the other end of the pull wire when not in use, and the plurality of clips each being attached to the second outer ring.

[0011] Furthermore, each of the plurality of fasteners includes a plurality of embedded parts and a guide part. The plurality of embedded parts are arranged on an outer surface of the fastener and spaced apart from one another. Each of the plurality of embedded parts comprises an embedded slot and two fastening bodies, each projecting from two sides of each of the plurality of embedded parts toward the embedded slot, and one of the plurality of first arcuate bars and one of the plurality of second arcuate bars are each attached within one of the plurality of embedded parts. The guide part is arranged on an inner surface of each of the plurality of fasteners and comprises an arcuate section and two angled sections, each extending from the arcuate section to two ends of each of the plurality of fasteners.

[0012] Furthermore, the multitude of fastening elements are arranged in different directions to fasten each of the multitude of first arc-shaped rods and each of the multitude of second arc-shaped rods.

[0013] Furthermore, the numerous fasteners are made of plastic material.

[0014] Furthermore, the stand includes two inclined and spaced-apart support rods and a crossbar connected to the undersides of the two support rods. The mounting shaft comprises a shaft tube, a screw hole formed between the stand and the handle and designed to engage one end of the shaft tube, and a mounting swivel that engages the other end of the shaft tube, opposite the screw hole. The shaft tube includes a first external thread for engaging with the screw hole and a second external thread for engaging with an internal thread of the mounting swivel.

[0015] Furthermore, the fastening shaft comprises two locking elements, and each of the two locking elements comprises an internal thread for interlocking with the second external thread of the shaft tube, wherein one end of the fastening bracket is suspended and fastened between the two locking elements on the second external thread of the shaft tube, and another end of the fastening bracket comprises an obliquely shaped annular section, and the annular section comprises a through hole.

[0016] Furthermore, the annular section also comprises a first protective disc and a second protective disc which is assembled with the first protective disc, wherein the first protective disc is hollow and one end of the first protective disc passes through the through-hole to be assembled with the second protective disc.

[0017] By virtue of the foregoing embodiment of the invention, the invention has the following features compared to the prior art: the winding wheel performs a free rotation by placing the sleeve onto the mounting shaft in order to send the other end of the pull wire out or retract it over the other end of the spring tube, and the second half-wheel frame is assembled or disassembled with the first half-wheel frame by means of the plurality of fastening elements, so that the pull wire with different specifications, wire types and lengths can be easily exchanged, which means that the wire puller according to the invention makes it easy to change the pull wire and is convenient to transport. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view of a conventional wire puller. Fig. Figure 2 is a perspective exploded view of a wire puller according to the invention. Fig. Figure 3 is a perspective view of a combination of the wire puller and a spring tube according to the invention. Fig. Figure 4 is a cross-sectional view of a side view of the wire puller in Fig. 3. Fig. Figure 5 is a cross-sectional view of a multitude of fasteners that form a first arc-shaped long rod in Fig. 4. Attach. Fig. Figure 6 is a perspective schematic representation of the wire drawer changing a pull wire in Fig. 3. DETAILED DESCRIPTION OF PREFERRED EXECUTION FORMS

[0018] The detailed description and technical content of the invention are presented below with reference to the accompanying drawings.

[0019] It will be on Fig. 2, Fig. 3, Fig. 4 and Fig. Reference is made to Section 5. The invention provides a wire puller 2 for easy wire replacement, comprising a main frame 3, a winding wheel 4, a plurality of fastening elements 5 and a spring tube 6.

[0020] The main frame 3 includes a stand 31, a handle 32 connected to the stand 31, a mounting shaft 33 arranged horizontally between the stand 31 and the handle 32, and a mounting bracket 34 provided on one side of the mounting shaft 33. In practical terms, the stand 31 includes two inclined and spaced-apart support rods 311 and a crossbar 312 connected to the undersides of the two support rods 311. The mounting shaft 33 includes a shaft tube 331, a screw hole 332 formed between the stand 31 and the handle 32 and designed to engage one end of the shaft tube 331, and a mounting rotatable piece 333 that engages the other end of the shaft tube 331, which is opposite the screw hole 332.In detail, the shaft tube 331 is provided with a first external thread 3311 for interlocking with the screw hole 332 and a second external thread 3312 for interlocking with an internal thread 3331 of the mounting rotary piece 333.

[0021] The mounting shaft 33 also includes two locking elements 334, each of which has an internal thread 3341 for engaging with the second external thread 3312 of the shaft tube 331. One end of the mounting bracket 34 is suspended and fastened between the two locking elements 334 on the second external thread 3312 of the shaft tube 331, and the other end of the mounting bracket 34 is provided with an inclined annular section 341, and the annular section 341 includes a through-hole 342.

[0022] The annular section 341 further includes a first protective disc 343 and a second protective disc 344, which is assembled with the first protective disc 343. The first protective disc 343 is hollow, and one end of the first protective disc 343 passes through the through-hole 342 to be assembled with the second protective disc 344, and one end 61 of the spring tube 6 penetrates from the first protective disc 343 into the annular section 341.

[0023] The winding wheel 4 comprises a first half-wheel frame 41 with a sleeve 411 and a second half-wheel frame 42, which is assembled accordingly with the first half-wheel frame 41. A winding area 43 is defined in an interior space between the first half-wheel frame 41 and the second half-wheel frame 42, and the winding area 43 is provided for receiving a draw wire 7. In one embodiment, the winding wheel 4 performs a free rotation by means of the sleeve 411 being placed onto the mounting shaft 33, and the winding wheel 4 is limited during the free rotation by the mounting rotating piece 333 so that it does not fall out of the second external thread 3312 of the shaft tube 331.The first half-wheel frame 41 further comprises a first outer ring 412 and a first inner ring 413, wherein the diameter of the first inner ring 413 is smaller than that of the first outer ring 412, and the first inner ring 413 is located within a diameter range of the first outer ring 412, and the first inner ring 413 is arranged on a horizontal plane different from that of the first outer ring 412. The sleeve 411 is connected to one side of a first inner ring 413 and projects towards the second half-wheel frame 42. The sleeve 411 is formed with a projecting block 4111 at one end opposite the first inner ring 413. The projecting block 4111, the first inner ring 413, and the sleeve 411 are in a hollow connection.

[0024] Furthermore, the first half-wheel frame 41 is provided with a plurality of first arcuate bars 414 between the sleeve 411 and the first outer ring 412. The plurality of first arcuate bars 414 are round bars, and one end of each plurality of first arcuate bars 414 is attached to one end of the sleeve 411, and the other end of each plurality of first arcuate bars 414 is attached to the first outer ring 412, thereby supporting the first half-wheel frame 41 by the plurality of first arcuate bars 414. The first half-wheel frame 41 also includes a first fastening sleeve 415, which is attached to one of the plurality of first arcuate bars 414 to fix one end 71 of the draw wire 7 without slippage.

[0025] The second half-wheel frame 42 comprises a second outer ring 421 and a second inner ring 422, wherein the diameter of the second inner ring 422 is smaller than that of the second outer ring 421, and the second inner ring 422 is located within a diameter range of the second outer ring 421, and the second inner ring 422 is arranged on a horizontal plane different from that of the second outer ring 421. The second half-wheel frame 42 is provided with a plurality of second arcuate bars 423 between the second inner ring 422 and the second outer ring 421, corresponding to the plurality of first arcuate bars 414.The plurality of second arcuate rods 423 are round rods, and one end of each plurality of second arcuate rods 423 is attached to the second inner ring 422, and the other end of each plurality of second arcuate rods 423 is attached to the second outer ring 421, thereby supporting the second half-wheel frame 42 by the plurality of second arcuate rods 423. The second half-wheel frame 42 further includes a second fastening sleeve 424 and a plurality of clips 425, the second fastening sleeve 424 being attached to the second outer ring 421 to secure the other end 72 of the draw wire 7 when not in use. The multiple clamps 425 are each provided on the second outer ring 421 to fasten the first half-wheel frame 41 and the second half-wheel frame 42, thereby improving the assembly stability of the first half-wheel frame 41 and the second half-wheel frame 42.In one embodiment, the plurality of clips 425 are arranged between the plurality of second arc-shaped rods 423. Furthermore, the shape and number of the plurality of clips 425 can be modified according to requirements.

[0026] The plurality of fasteners 5 are made of plastic material. For illustration, one fastener 5 is taken below. The fastener 5 includes a plurality of embedded parts 51 and a guide part 52. The plurality of embedded parts 51 are arranged on an outer surface of the fastener 5 and spaced apart from one another, each of the plurality of embedded parts 51 including an embedded slot 511 and a fastening body 512 projecting from one side of the embedded part 51 towards the embedded slot 511, and one of the plurality of first arcuate rods 414 and one of the plurality of second arcuate rods 423 are each attached in one of the plurality of embedded parts 51 by the two fastening bodies 512.The guide element 52 is arranged on an inner surface of the fastening element 5 facing the second outer ring 421, so that the pull wire 7 can be guided into its position. The guide element 52 comprises an arc section 521 and two inclined sections 522, each extending from the arc section 521 to two ends of the fastening element 5. The pull wire 7 in the winding area 43 is guided by the two inclined sections 522 for positioning in the fastening element 5. In one embodiment, the plurality of fastening elements 5 are arranged in different directions to fasten each of the plurality of first arc-shaped bars 414 and each of the plurality of second arc-shaped bars 423, so that the first half-wheel frame 41 and the second half-wheel frame 42 interlock more securely.

[0027] It will be on Fig. 2, Fig. 3, Fig. 4 and Fig. Reference is made to Figure 5. In one embodiment, one end 71 of the pull wire 7 is attached to the first mounting sleeve 415 in the winding area 43, one end 61 of the spring tube 6 extends obliquely from the through-hole 342 into the winding area 43, and the other end 72 of the pull wire 7 runs from one end 61 to the other end 62 of the spring tube 6. During use, a user holds the other end 62 of the spring tube 6 with one hand and the other end 72 of the pull wire 7 with the other hand to pull it back or push it forward. The winding wheel 4 performs a free rotation by placing the sleeve 411 onto the mounting shaft 33 to extend or retract the other end 72 of the pull wire 7 from the other end 62 of the spring tube 6.

[0028] Referring to Fig.6. When the user replaces the pull wire 7 at the construction site, the plurality of fastening elements 5 are first disassembled and the second half-wheel frame 42 is separated from the first half-wheel frame 41. The pull wire 7 can then be replaced with different specifications, wire types, and lengths. The second half-wheel frame 42 is then reassembled with the first half-wheel frame 41, and the plurality of fastening elements 5 are each engaged with one of the plurality of first arcuate rods 414 and one of the plurality of second arcuate rods 423. With the wire puller according to the invention, changing the pull wire is simple, and it is convenient to transport.

Claims

[1] Wire puller (2) for easy replacement of wires, comprising: a main frame (3) comprising a stand (31), a handle (32) connected to the stand (31), a mounting shaft (33) arranged horizontally between the stand (31) and the handle (32), and a mounting bracket (34) configured on one side of the mounting shaft (33); a winding wheel (4) comprising a first half-wheel frame (41) with a sleeve (411), and a second half-wheel frame (42) which is assembled accordingly with the first half-wheel frame (41), wherein a winding area (43) is defined in an interior space between the first half-wheel frame (41) and the second half-wheel frame (42), and the winding area (43) is provided for receiving a draw wire (7), wherein one end of the draw wire (7) is attached to the winding wheel (4), and wherein the winding wheel (4) is configured to perform a free rotation by placing the sleeve (411) onto the mounting shaft (33); a plurality of fastening elements (5), each attached to the first half-wheel frame (41) and the second half-wheel frame (42); and a spring tube (6), wherein one end of the spring tube (6) passes through and is attached to the mounting bracket (34), wherein another end of the spring tube (6) is provided for another end of the draw wire (7) which is led out or retracted when the winding wheel (4) is in free rotation, characterized by , that the first half-wheel frame (41) comprises a first outer ring (412) and a first inner ring (413), wherein a diameter of the first inner ring (413) is smaller than that of the first outer ring (412), the first inner ring (413) is located within a diameter range of the first outer ring (412), and the first inner ring (413) is arranged on a horizontal plane different from the first outer ring (412); wherein the sleeve (411) is connected to a side of a first inner ring (413) and projects towards the second half-wheel frame (42), wherein the sleeve (411) is formed with a projecting block (4111) at an end opposite the first inner ring (413), and the projecting block (4111), the first inner ring (413) and the sleeve (411) are hollowly connected to each other; wherein the first half-wheel frame (41) further comprises a plurality of first arcuate bars (414) between the sleeve (411) and the first outer ring (412), wherein the plurality of first arcuate bars (414) are round bars, wherein one end of each of the plurality of first arcuate bars (414) is attached to one end of the sleeve (411) and another end of each of the plurality of first arcuate bars (414) is attached to the first outer ring (412); wherein the second half-wheel frame (42) comprises a second outer ring (421) and a second inner ring (422), wherein a diameter of the second inner ring (422) is smaller than that of the second outer ring (421), wherein the second inner ring (422) is arranged within a diameter range of the second outer ring (421), and the second inner ring (422) is arranged on a horizontal plane different from the second outer ring (421); and wherein the second half-wheel frame (42) further comprises a plurality of second arcuate bars (423) between the second inner ring (422) and the second outer ring (421) and corresponding to the plurality of first arcuate bars (414), wherein the plurality of second arcuate bars (423) are round bars, wherein one end of each of the plurality of second arcuate bars (423) is attached to the second inner ring (422), and another end of each of the plurality of second arcuate bars (423) is attached to the second outer ring (421), wherein each of the plurality of fastening elements (5) comprises a plurality of embedded parts (51) and a guide part (52), wherein the plurality of embedded parts (51) are arranged on an outer surface of the fastening element (5) and are spaced apart from each other; wherein each of the plurality of embedded parts (51) comprises an embedded slot (511) and two fastening bodies (512) each projecting from two sides of each of the plurality of embedded parts (51) in the direction of the embedded slot (511), wherein one of the plurality of first arcuate bars (414) and one of the plurality of second arcuate bars (423) are each attached in one of the plurality of embedded parts (51); and wherein the guide part (52) is arranged on an inner surface of each of the plurality of fastening elements (5) and the guide part (52) comprises an arc section (521) and two inclined sections (522) each extending from the arc section (521) to two ends of each of the plurality of fastening elements (5). [2] Wire puller (2) for easy replacement of wires according to claim 1, wherein the first half-wheel frame (41) comprises a first fastening sleeve (411) which is attached to one of the plurality of first arc-shaped rods (414) to secure an end of the pull wire (7). [3] Wire puller (2) for easy replacement of wires according to claim 1, wherein the second half-wheel frame (42) comprises a second mounting sleeve (424) and a plurality of clips (425), wherein the second mounting sleeve (424) is attached to the second outer ring (421) to secure the other end of the pull wire (7) when not in use, and wherein the plurality of clips (425) are each attached to the second outer ring (421). [4] Wire puller (2) for easy replacement of wires according to claim 1, in which the plurality of fastening elements (5) are each arranged in different directions to fix each of the plurality of first arc-shaped rods (414) and each of the plurality of second arc-shaped rods (423). [5] Wire puller (2) for easy replacement of wires according to claim 4, wherein the plurality of fastening elements (5) are made of plastic material. [6] Wire puller (2) for easy replacement of wires according to claim 1, wherein the stand (31) comprises two support rods (311) which are inclined and spaced apart from each other, and a cross rod (312) which is connected to the undersides of the two support rods (311); wherein the mounting shaft (33) comprises a shaft tube (331), a screw hole (332) which is formed between the stand (31) and the handle (32) and is provided for engagement with one end of the shaft tube (331), and a mounting rotary piece (333) which engages with the other end of the shaft tube (331) opposite the screw hole (332); and wherein the shaft tube (331) comprises a first external thread (3311) for engagement with the screw hole (332) and a second external thread (3312) for engagement with an internal thread (3331) of the mounting rotary piece (333). [7] Wire puller (2) for easy replacement of wires according to claim 6, wherein the mounting shaft (33) comprises two locking elements (334) and each of the two locking elements (334) comprises an internal thread (3341) for engagement with the second external thread (3312) of the shaft tube (331), wherein one end of the mounting bracket (34) is suspended and fastened between the two locking elements (334) on the second external thread (3312) of the shaft tube (331), and another end of the mounting bracket (34) comprises an annular section (341) which is arranged obliquely, and the annular section (341) has a through hole (342). [8] Wire puller (2) for easy replacement of wires according to claim 7, wherein the annular section (341) further comprises a first protective disc (343) and a second protective disc (344) assembled with the first protective disc (343), and wherein the first protective disc (343) is hollow and one end of the first protective disc (343) passes through the through hole (342) to be assembled with the second protective disc (344).

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