WIRE PULLER

Abstract

A wire take-up tool (4) comprises a winding wheel (5), a roller (6), a mounting frame (7), and a spring tube (8). The winding wheel (5) has an internal winding area (52) to receive a pull cord (9). One side of the winding wheel (5) is connected to a concave frame (501) with a receiving section (502), and the other side has a hollow section (511). An inner edge of the winding wheel (5) is designed to secure one end of the pull cord (9). The roller (6) is positioned within the receiving section (502) and allows free rotation between the roller (6) and the winding wheel (5). One side of the mounting frame (7) is fixed to the roller (6), enabling the winding wheel (5) to be laid flat. One end of the spring tube (8) is fixed to the mounting frame (7).

Description

AREA OF INVENTION

[0001] The invention relates to a wire puller and in particular to a wire puller that does not require a handle and can be placed flat. BACKGROUND OF THE INVENTION

[0002] Document US 3,186,659 A discloses a device for winding and storing wire ropes. This device comprises a housing for winding and storing wire ropes, and the housing is mounted on a base that serves as a stand and rotates on it. In this device, the bearings are mounted directly on the shaft so that the housing can rotate on the shaft. However, when the bearings need to be replaced, it is cumbersome and requires considerable force for the user to remove them from the shaft. Similar devices, in which a bracket or stand is necessary for positioning and bearings are mounted directly on the shaft, are also known from prior art documents US 3,162,394 A, US 2001 / 0008260A1, US 3,491,967 A, and US 4,471,651 A.The device described in document US 3,052,425 A has radial arms configured for support against a base and features a ball bearing positioned between two circular plates and on a sleeve to form the rotary mechanism. In the device described in document FR 336225 A, the housing is mounted directly onto the shaft to form the rotary mechanism, and document DE 23 33 435 A1 discloses a device with a stand unit in which the wheel is mounted directly onto the shaft to form the rotary mechanism.

[0003] With reference to Fig. 1 is a manual wire puller 1 made of plastic and includes a winding wheel 10 and a handle 11 attached to the top of the winding wheel 10. When the manual wire puller 1 is operated on a flat surface, a user holds the handle 11, which bears the additional weight of a pull cord 100, with one hand and turns the winding wheel 10 with the other hand to advance or retract the pull cord 100 wound on the winding wheel 10. This is quite laborious and inconvenient to use. Furthermore, when the manual wire puller 1 is operated at a height, there is a high operational risk because both hands are required to support the additional weight of the pull cord 100 and to turn the pull cord 100.

[0004] With reference to Fig. 2 An electric wire puller 2 provides a handle 20 which feeds a pull cord 210 in a winding wheel 21. The handle 20 comprises a main body 201 made of metal, a pressure body 202 made of a plastic material which is rotatably mounted at one end above the handle 20, and a mounting body 203 which is pivotally connected to a central position of the handle 20. The handle 20 is provided internally with a belt reel 204, from one side of which a shaft rod 205 projects for connection to an electric drill 22.When the electric wire puller 2 is operated on a flat surface, the user holds the handle 20, which bears the additional weight of a pull cord 210, with one hand and holds the electric drill tool 22 with the other hand to replace the manual wire puller that rotates the winding wheel 21, thus sending the pull cord 210 into or retracting it from the winding wheel 21. This requires operating the electric wire puller 2 with both hands, which is cumbersome and inconvenient. Furthermore, when the electric wire puller 2 is operated at a height, there is a high operational risk because both hands are needed to bear the additional weight of the pull cord 210 and to hold the electric drill tool 22 for rotation.

[0005] It will be on Fig. 3 Reference is made to a wire puller 3 that can be placed on a floor for operation. The wire puller 3 includes a metal bracket 30, a winding wheel 31 having a shaft 311 rotatably mounted on one side of the metal bracket 30, a rod 32 connected to an opposite side of the metal bracket 30, and a spring tube 33 attached to one end of the rod 32. The spring tube 33 rotates a winding wheel 31 to send out or retract a pull cord 312. Because the wire puller 3 is placed on the floor for operation, the metal bracket 30 is designed to be large and heavy to prevent it from tipping over when the pull cord 312 is pulled out of the winding wheel 31. However, its weight makes the wire puller 3 difficult to hold.Additionally, if the wire puller 3 is operated at the elevated location and the spring tube 33 is not long enough to retract the pull cord 312, one person is needed to pull a wire from the elevated location while another person helps to hold the spring tube 33 at ground level to retract the wire. Therefore, improvements are desirable. SUMMARY OF THE INVENTION

[0006] A main objective of the invention is to disclose a wire puller designed for a user to pull or pick up a wire directly and smoothly without carrying a handle, and which can be placed flat on a surface at a work site.

[0007] To achieve the aforementioned goal, the invention provides a wire puller with the features according to claim 1, which is without a handle and can be placed flat.The wire winder comprises a winding wheel, the interior of which is provided with a winding area for receiving a pull cord, wherein one side of the winding wheel is connected to a receiving section by a convex frame and the other side of the winding wheel is provided with a hollow section, and wherein an inner edge of the winding wheel is provided to secure one end of the pull cord; a roller arranged in the receiving section, providing free rotation between the roller and the winding wheel; a mounting frame, wherein one side of the mounting frame is attached to the roller so that the winding wheel is mounted flat; and a spring tube, wherein one end of the spring tube is attached to the mounting frame, allowing the winding wheel to rotate by means of the roller in a clockwise or counterclockwise direction to send out or retract the other end of the pull cord from the other end of the spring tube.

[0008] The winding wheel further comprises a first half-wheel frame and a second half-wheel frame, wherein the first half-wheel frame is connected to the convex frame, wherein an inner surface of the convex frame is provided with an annular convex body, and an outer edge of the first half-wheel frame is provided with a plurality of first convex pawls spaced at intervals, and wherein a fastening cord opening is provided below one of the plurality of first convex pawls to secure an end of the pull cord, wherein a center of the second half-wheel frame is provided with the hollow section for the projection of the convex frame, and wherein an outer edge of the second half-wheel frame is provided with a plurality of second convex pawls spaced at intervals, the plurality of second convex pawls being composed correspondingly to the plurality of first convex pawls.

[0009] The roller further comprises a base arranged in the receiving section and a plurality of wheels arranged on an outer edge of the base, wherein two sides of the base are each provided with an inwardly recessed limiting section, and the outer edge of the base between two limiting sections is provided with a plurality of shaft holes spaced apart from one another, the plurality of wheels each being provided with a male and a female gear, the male gear having a square projecting column, the female gear having a shaft rod and a square hole in the shaft rod, the square projecting column of the male gear engaging correspondingly with the square hole of the female gear such that the shaft rod is rotated in one of the plurality of shaft holes and the male and female gearsThe elements positioned at the two boundary sections are able to rotate relative to the ring-shaped convex body at the inner edge of the convex frame.

[0010] In a preferred embodiment, the mounting frame comprises a base plate and a support frame, wherein each corner of the base plate has a through-hole, each through-hole being embedded in a projecting pad, and wherein the base plate is provided with a mounting projection section projecting towards the base, one side of the mounting projection section being fixed to a side of the base to form a gap between the mounting projection section and the underside of the first half-wheel frame, wherein the support frame comprises a side plate frame being fixed to a side of the base, and a bracket being fixed to the side plate frame, the side plate frame providing a concave surface, and the bracket being provided with a cover that is attached to the concave surface.wherein a vertical plate is connected to the cover and a head section is connected to a top of the vertical plate, the head section being arranged at an angle and having a passage hole.

[0011] In a preferred embodiment, the concave surface of the side plate frame is provided with two square insertion slots, and two square insert bodies of the cover engage with and are attached to the two square insertion slots.

[0012] In a preferred embodiment, one end of the spring tube projects obliquely into the winding area via the passage hole, and the other end of the spring tube is led obliquely out along the passage hole to provide the other end of the pull cord for exit.

[0013] In a preferred embodiment, the other end of the spring tube is formed with an enlarged tube and an outlet end of the enlarged tube is provided with an internal thread.

[0014] In a preferred embodiment, the wire puller includes at least one extension spring tube which is connected to the extended tube at the other end of the spring tube.

[0015] In a preferred embodiment, one end of the at least one extension spring tube is provided with an external thread for screwing and fixing to the internal thread of the extended tube, wherein the other end of the at least one extension spring tube is formed with an extended tube and an outlet end of the extended tube is provided with an internal thread.

[0016] In a preferred embodiment, the head section further comprises a first holder and a second holder which is assembled with the first holder, wherein the first holder is hollow and one end of the first holder penetrates into the passage hole, wherein the second holder is attached to one end of the first holder.

[0017] By implementing the invention as described above, the invention has the following features compared to the prior art: the wire puller of the invention is convenient for the user to pull or pick up the wire smoothly without having to carry the handle, but by placing it flat on the surface of the work area, which is very convenient, saves time and is quick to use. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view of a conventional manual wire puller. Fig. Figure 2 is a perspective view of a conventional electric wire puller. Fig. Figure 3 is a perspective view of a conventional wire puller. Fig. Figure 4 is a perspective view of a combination of a wire puller and a spring tube of the invention. Fig. Figure 5 is a perspective exploded view of the wire puller of the invention. Fig. Figure 6 is a perspective exploded view of the wire puller from Fig. 5 from a different angle. Fig. Figure 7 is a perspective exploded view of a winding wheel of the wire puller in Fig. 6. Fig. Figure 8 is a cross-sectional view of a combination of the wire puller in Fig. 4. Fig. Figure 9 is a perspective exploded view of the wire puller and spring tube in Fig. 4. Fig. Figure 10 is a perspective exploded view of the wire puller and an extension spring tube in Fig. 9. Fig. Figure 11 is a perspective view of the wire puller and the extension spring tube in Fig. 10. Fig. Figure 12 is a perspective schematic representation of wire being pulled off after the wire puller and extension spring tube have been inserted. Fig. 11 were assembled. Fig. Figure 13 is a perspective schematic representation of the retraction of wire after the wire puller and extension spring tube have been inserted into the Fig. 11 were assembled. DETAILED DESCRIPTION OF PREFERRED EXECUTION FORMS

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

[0019] It will be on Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. Reference is made to Figure 8. The invention provides a wire puller 4 comprising a winding wheel 5, a roller 6, a mounting frame 7, and a spring tube 8. The wire puller 4 is designed to allow a user to pull or pick up a wire directly and smoothly without having to carry a handle, and it can be laid flat on a floor at a work site.

[0020] The winding wheel 5 comprises a first half-wheel frame 50 and a second half-wheel frame 51, which is coupled to the first half-wheel frame 50. The winding wheel 5 is provided internally with a winding area 52 for receiving a draw cord 9. A connection exists at the center of one side of the first half-wheel frame 50 to a convex frame 501. The convex frame 501 is provided with a receiving section 502, and an inner surface of the convex frame 501 is provided with an annular convex body 503. An outer edge of the first half-wheel frame 50 is provided with a plurality of first convex pawls 504, which are arranged at intervals, and a fastening cord opening 505 is provided under one of the plurality of first convex pawls 504 to secure an end 91 of the draw cord 9 without slippage.

[0021] The winding wheel 5 is provided on one side with a hollow section 511 to allow the convex frame 501 to protrude. Specifically, the winding wheel 5 is provided with the hollow section 511 at the center of the second half-wheel frame 51 to allow the convex frame 501 to protrude, and an outer edge of the second half-wheel frame 51 is provided with a plurality of second convex pawls 512, which are arranged at intervals. The plurality of second convex pawls 512 are assembled correspondingly with the plurality of first convex pawls 504. The plurality of first convex pawls 504 can be coupled and assembled with the plurality of second convex pawls 512 by screwing, riveting, or fitting.

[0022] The roller 6 is arranged in the receiving section 502 and causes free rotation between the roller 6 and the winding wheel 5. The roller 6 includes a base 61 and a plurality of running wheels 62. The base 61 is arranged in the receiving section 502, and the plurality of running wheels 62 are arranged on an outer edge of the base 61. Two sides of the base 61 are each provided with an inwardly recessed limiting section 611, and the outer edge of the base 61 between two limiting sections 611 is provided with a plurality of spaced-apart shaft holes 612.Each of the plurality of wheels 62 is formed with a male guide wheel 621 and a female guide wheel 622, wherein the male guide wheel 621 is provided with a square projecting column 6211, wherein the female guide wheel 622 is provided with a shaft rod 6220 and a square hole 6221 in the shaft rod 6220, wherein the square projecting column 6211 of the male guide wheel 621 engages correspondingly with the square hole 6221 of the female guide wheel 622, so that the shaft rod 6220 can be rotated in one of the plurality of shaft holes 612, and the male guide wheel 621 and the female guide wheel 622, which are each positioned at the two boundary sections 611, are able to align themselves relative to the annular convex body 503 at the inner edge of the convex frame 501. turn.

[0023] One side of the mounting frame 7 is fixed to one side of the roller 6, allowing the winding wheel 5 to be positioned flat. The mounting frame 7 includes a base plate 71 and a support frame 72. Each corner of the base plate 71 has a through-hole 711, each through-hole being embedded by a projecting pad 712. The projecting pads 712 of the base plate 71 allow it to be positioned stably and flat without slipping. The base plate 71 is provided with a mounting projection section 713 projecting towards the base 61. One side of the mounting projection section 713 is fixed to one side of the base 61 to form a gap 714 between the mounting projection section 713 and the underside of the first half-wheel frame 50, thus ensuring stable rotation of the winding wheel 5.The mounting projection section 713 can be coupled and assembled with the base 61 by screwing, riveting or fitting.

[0024] The support frame 72 includes a side plate frame 73 and a bracket 74. One side of the side plate frame 73 is attached to one side of the base 61, and the bracket 74 is attached to the side plate frame 73. In one embodiment, the side plate frame 73 is approximately elongated, and one side of the side plate frame 73, facing the bracket 74, is provided with a concave surface 731. The side plate frame 73 can be coupled and assembled with the base 61 by screwing, riveting, or fitting.

[0025] The bracket 74 comprises a cover 741 fixed to the concave surface 731, a vertical plate 742 connected to the cover 741, and a head section 743 connected to a top surface of the vertical plate 742. The cover 741 is provided with two rectangular inserts 7411, and the head section 743 is arranged at an angle and has a passage 7431. The bracket 74 can be assembled by embedding it with the side plate frame 73. In this embodiment, the concave surface 731 of the side plate frame 73 is provided with two rectangular insertion slots 732 that correspond to the two rectangular inserts 7411 of the cover 741.Accordingly, when the cover 741 of the bracket 74 is attached to the concave surface 731 of the side plate frame 73, the two square insert bodies 7411 engage with the two square insert slots 732 and are fixed thereto, and the cover 741 is then screwed to the side plate frame 73 to reinforce the fastening of the cover 741 and the side plate frame 73.

[0026] Referring to Fig. 4, Fig. 5 and Fig. 6, one end 81 of the spring tube 8 penetrates obliquely into the winding area 52 via the passage hole 7431 and the other end 82 of the spring tube 8 is led obliquely out along the passage hole 7431 to provide the other end 92 of the pull cord 9 for exiting.

[0027] Referring to Fig. 4 and Fig. In one embodiment, the head section 743 also includes a first holder 744 and a second holder 745, which is assembled with the first holder 744. The first holder 744 is hollow, and one end 7441 of the first holder 744 penetrates the passage hole 7431. The second holder 745 is fitted over one end 7441 of the first holder 744. The first holder 744 is designed to facilitate one end 81 of the spring tube 8 penetrating the winding area 52. The other end 82 of the spring tube 8 is formed with an expanded tube, and an outlet end of the expanded tube is provided with an internal thread.

[0028] In accordance with the different requirements, the wire puller 4 includes, in one embodiment as shown in Fig. 10 and Fig. Figure 11 shows at least one extension spring tube 8a, which is connected to the extended tube at the other end 82 of the spring tube 8. One end of the at least one extension spring tube 8a is provided with an external thread for screwing and fixing it to the internal thread of the extended tube. The other end 82a of the at least one extension spring tube 8a is formed with an extended tube, and an outlet end of the extended tube is provided with an internal thread for screwing it to other extension spring tubes, so that it is convenient for the user to add other extension spring tubes according to the height of the work area.

[0029] It will be on Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11 and Fig. 12 Reference is made to Figure 12. In one embodiment, one end 91 of the pull cord 9 is fixed to the fastening cord opening 505 and received in the winding area 52, while the other end 92 of the pull cord 9 extends from the other end 82 of the spring tube 8 or the other end 82a of the extension spring tube 8a. During operation, the user holds the other end 82 of the spring tube 8 or the other end 82a of the extension spring tube 8a with one hand and holds the other end 92 of the pull cord 9 to retract or advance it (as shown in Figure 12). Fig. 13) with the other hand, so that the winding wheel 5 and the convex frame 501 are wound by the roller 6 of the wire puller 4 clockwise or counterclockwise (as shown in Fig. 13) are rotated, and the other end 92 of the pull cord 9 in the winding area 52, from the other end 82 of the spring tube 8 or the other end 82a of the extension spring tube 8a, clockwise towards the output or counterclockwise (as shown in Fig. (as shown in 13) is rotated to retract into the winding area 52. The wire puller 4 of the invention is convenient for the user to immediately pull or pick up the wire smoothly without having to carry the handle, but by placing it flat on the surface of the work area, which is very convenient, labor-saving and quick to use.

Claims

[1] Wire puller (4) comprising: a winding wheel (5) which is provided inside with a winding area (52) for receiving a pull cord (9), wherein one side of the winding wheel (5) is connected to a convex frame (501) with a receiving section (502), and the other side of the winding wheel (5) is provided with a hollow section (511), and an inner edge of the winding wheel (5) is provided to fix one end of the pull cord (9); a roller (6) which is arranged in the receiving section (502) and establishes a free rotation between the roller (6) and the winding wheel (5); a mounting frame (7), wherein one side of the mounting frame (7) is attached to the roller (6) so that the winding wheel (5) is positioned flat; and a spring tube (8) wherein one end of the spring tube (8) is attached to the mounting frame (7) wherein the winding wheel (5) can rotate clockwise or counterclockwise by means of the roller (6) in order to send the other end of the pull cord (9) over or retract it beyond the other end of the spring tube (8); wherein the winding wheel (5) comprises a first half-wheel frame (50) and a second half-wheel frame (51), wherein the first half-wheel frame (50) is connected to the convex frame (501), wherein an inner surface of the convex frame (501) is provided with an annular convex body (503), wherein an outer edge of the first half-wheel frame (51) is provided with a plurality of first convex pawls (504) arranged at intervals, and a fastening cord opening (505) is provided under one of the plurality of first convex pawls (504) to secure an end of the pull cord (9), wherein a center of the second half-wheel frame (51) is provided with the hollow section (511) so that the convex frame (501) projects outwards, and wherein an outer edge of the second half-wheel frame (51) is provided with a plurality of second convex pawls (512) which are arranged at intervalswherein the plurality of second convex pawls (512) are composed correspondingly to the plurality of first convex pawls (504); and, wherein the roller (6) comprises a base (61) arranged in the receiving section (502), and a plurality of rollers (62) arranged on an outer edge of the base (61), wherein two sides of the base (61) are each provided with an inwardly recessed limiting section (611), and the outer edge of the base (61) between two limiting sections (611) is provided with a plurality of spaced-apart shaft holes (612), wherein the plurality of rollers (62) are each provided with a male pinion (621) and a female pinion (622), wherein the male pinion (621) is provided with a square projecting column (6211), and wherein the female pinion (622) is provided with a shaft rod (6220) and a square hole (6221) in the shaft rod (6220), wherein the square projecting column (6211) of the male pinion The pin wheel (621) engages with the square hole (6221) of the female pin wheel (622),so that the shaft rod (6220) is rotated in one of the plurality of shaft holes (612), and the male pinion (621) and the female pinion (622), each positioned on the two limit sections (611), are able to rotate relative to the annular convex body (503) on the inner edge of the convex frame (501). [2] Wire puller (4) according to claim 1, wherein the mounting frame (7) comprises a base plate (71) and a support frame (72), each corner of the base plate (71) comprising a through hole (711), each through hole (711) being embedded in a projecting pad (712), and the base plate (71) being provided with a mounting projection section (713) projecting towards the base (61), one side of the mounting projection section (713) being attached to a side of the base (61) to form a gap (714) between the mounting projection section (713) and the underside of the first half-wheel frame (50), the support frame (72) comprising a side plate frame (73) attached to a side of the base (61) and a bracket (74) attached to the side plate frame (73), the side plate frame (73) having a concave surface (731) wherein the holder (74) is provided with a cover (741),which is fixed to the concave surface (731), wherein a vertical plate (742) is connected to the cover (741), and a head section (743) is connected to a top of the vertical plate (742), wherein the head section (743) is arranged obliquely and is provided with a passage hole (7431). [3] Wire puller (4) according to claim 2, in which the concave surface (731) of the side plate frame (73) is provided with two square insertion slots (732), and two square insertion bodies (7411) of the cover (741) engage with and are fixed to the two square insertion slots (732). [4] Wire puller (4) according to claim 2, in which one end of the spring tube (8) enters the winding area (52) obliquely via the passage hole (7431), and the other end of the spring tube (8) is led obliquely out along the passage hole (7431) to provide the other end of the pull cord (9) for exiting. [5] Wire puller (4) according to claim 4, wherein the other end of the spring tube (8) is formed with an enlarged tube and an outlet end of the enlarged tube is provided with an internal thread. [6] Wire puller (4) according to claim 5, which further comprises at least one extension spring tube (8a) which is connected to the extended tube (8a) at the other end of the spring tube (8). [7] Wire puller (4) according to claim 6, wherein one end of at least one extension spring tube (8a) is provided with an external thread for screwing and fastening to the internal thread of the extended tube, wherein the other end of the at least one extension spring tube (8a) is formed with an extended tube and an outlet end of the extended tube is provided with an internal thread. [8] Wire puller (4) according to claim 2, wherein the head section (743) further comprises a first holder (744) and a second holder (745) which is assembled with the first holder (744), wherein the first holder (744) is hollow, and wherein one end of the first holder (744) penetrates into the passage hole (7431), wherein the second holder (745) is attached to one end of the first holder (744).

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