JP3042025U - Wire threading device for conduit - Google Patents

Abstract

(57) Abstract: An object of the present invention is to realize a wire threading device in a conduit which is inexpensive and allows a wire to be easily and easily threaded in the conduit. A cylindrical cylinder (20) having an air passage (21) inside is provided, a hollow guide portion (30) communicating with the air passage (21) is provided at a front end portion thereof, and a winding wire portion around which a lead wire (42) is wound is provided on an upper side. 40
In the wire threading device in the conduit in which the leading wire 42 is inserted into the guide portion and pulled out from the opposite end, and the guide plug 45 is locked at the tip end thereof, the cylinder 20 has an internal air passage. A check valve 22 is provided at the front of 21 and an interlocking rod 24 protruding to the outside of the cylinder at the rear end and connected to a hand grip 25 at the end, and a piston 23 connected to the interlocking rod 24 are provided at the front end of the cylinder. A wire support hole 271 for guiding the lead wire 42 is provided on the outer periphery, and a flexible hose 32 is provided at the tip of the guide portion 30.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire threading device for a conduit, and more particularly, to a wire threading device for a conduit that allows a wire to be quickly and easily inserted at any bending angle of the conduit.

[0002]

[Prior art]

 With the spread of electrical appliances in modern life, conduits must be installed in buildings, for example for wiring telephones, televisions, computers and other electrical appliances. However, since the laying of conduits in a building is usually not straight, but twisted and bent, a wire threading device is required to efficiently run the wires through the conduit.

As shown in FIG. 5, a conventional conduit wire threading device 10 is composed of a cylinder body 11 and a spool 12 around which a lead wire 16 axially mounted on one end of the cylinder body 11 is wound. At one end of the cylinder body 11, an air joint 13 for connecting compressed air to the inside of the cylinder 11 by connecting to a compressor having a higher pressure than the axial direction is provided, and the other end is provided with a lead wire 16 on the upper side. The guide wire portion 14 is provided with a feed-in hole 151 and a hollow circular tubular guide portion 15 on the lower side, and the lead wire 16 drawn out from the spool 12 passes through the feed-in hole and is inside the guide wire tube portion 14. It has a structure in which a guide plug 17 is attached to the front end of the guide portion 15 and is pulled out from the guide portion 15.

With such a structure, in order to pass the wire through the conduit, first, the guide plug 17 is inserted into the conduit (not shown), and then the guide portion 15 is brought into contact with the distal end portion of the conduit. First, high-pressure air is supplied to the cylinder body 11 via the air joint 13. When this high-pressure air is blown into the conduit, the guide plug 17 is pushed out from the other end of the conduit, and the lead wire 16 is also conveyed and led out to the outside of the end. Next, a required wire is connected to the guide plug 17 led out to the outside of the end portion, and the lead wire 16 is unwound and collected while rotating the spool 12, so that the wire is passed through the conduit.

With the above-described structure, the wire can be passed through the conduit. However, the open end of the conduit is not always installed perpendicular to the wall surface, and since the guide part 15 is also made of a hard material, the guide end should be fitted correctly according to the angle of the open end of the conduit. If they cannot touch each other, the airtightness between the guide part 15 and the conduit is deteriorated, and the phenomenon of air leakage easily occurs.Therefore, the guide plug 17 connected to the lead wire 16 is smoothly passed through the far end of the conduit. Can't do it.

Further, in order to supply the required high-pressure air to the wire threading device 10 in the conventional conduit as described above, a high-pressure air supply device such as an air compressor must be used. Not only does it decrease, but it also causes the problem that the number of work steps is considerably increased.

[0007]

[Problems to be solved by the device]

 In view of the problems of the conventional wire threading device in a conduit, the present invention provides a lead wire take-up spool outside the air cylinder of a hand-operated air pump, and a flexible hose guide on the air supply side of the pump. Part is attached, a wire passing device is formed through the lead wire, and since the guide part is flexible, it can bend according to the bending angle of the conduit, and it is necessary to have auxiliary equipment such as a costly and bulky air compressor. It is an object of the present invention to provide a conduit wire threading device which has no special features and is capable of quickly pulling out a wire even in a considerable working environment and has a quick and convenient feature.

[0008]

[Means for Solving the Problems]

 To achieve the above object, a wire threading device in a conduit according to the present invention is provided with a cylindrical cylinder having an air passage inside, and a hollow guide portion communicating with the air passage is provided at a front end portion of the conduit. In the wire threading device in the conduit, the winding part for winding the lead wire is attached to the guide wire, the lead wire is inserted into the guide part and pulled out from the opposite end, and the guide plug is locked to the tip end part. The cylinder is provided with a check valve at the front end portion of the internal air passage, and at the rear end portion with an interlocking rod protruding to the outside of the cylinder and connecting a hand grip to the end, and a piston connected to the interlocking rod. A support part having a wire support hole for guiding the lead wire is provided on the outer periphery of the front end of the air cylinder, and the tip of the guide part is flexible and bendable according to the mounting angle of the conduit. Outside on the tip Is equipped with a hose fitted with a plurality of sealing rings that can become closer to the conduit and can come into close contact with the conduit.By pressing the grip to send air into the conduit, the guide plug can be quickly inserted into the conduit. It is characterized in that it can be pumped along. With this configuration, the lead wire can be easily pulled out in any work environment, and it has the feature of being quick and convenient.

[0009]

[Embodiment of the invention]

 Hereinafter, an embodiment of a wire threading device in a conduit according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, in the wire threading device of the conduit of the present invention, the hollow cylindrical cylinder 20 has a ventilation passage 21 inside and extends at the front end so as to communicate with the ventilation passage 21. Then, the hollow guide portion 30 is provided. Furthermore, a winding portion 40 having a crank handle 43 similar to that of a known fishing rod reel is welded to the upper side of the hollow cylindrical cylinder 20. A spool 41, which can be freely rotated by the rotation of a crank handle 43 and around which a lead wire 42 is wound, is provided at the tip of the winding portion 40. The lead wire 42 can be rewound by the rotation of the crank handle 43.

As shown in FIG. 2, the hollow cylindrical cylinder 20 is provided with a check valve 22 at the front end of a hollow air passage 21 and has a check valve 22 at the rear end that projects to the outside of the cylindrical cylinder 20 and ends. An interlocking rod 24 connected with a hand-pushing grip 25 is provided on the above, and a piston 23 connected to the interlocking rod 24 is installed so as to be freely movable back and forth in the axial direction. A plurality of air holes 221 are provided around the surface of the check valve 22 and a seat 222 is provided on the tip end surface to cover the air holes 221. An elastic pad member 231 is attached to the inside of the piston 23. The pad member 231 prevents the air from escaping to the outside by adhering to the pipe wall by the air pressure generated inside the air passage 21 when pushing the hand grip 25 in the direction of compressing the air to send the air. To do.

On the other hand, when the hand grip 25 is pulled to the outside, the pad member 231 is internally contracted in the axial direction to allow the outside air to flow into the ventilation path 21. Further, in order to prevent the interlocking rod 24 from slipping too much into the air passage 21, the interlocking rod 24 is provided with a stop projection 241 near the hand grip 25. A support portion 27 having a wire support hole 271 in the same axial direction as the winding portion 40 is provided on the outer peripheral surface of the tip end portion of the hollow cylindrical cylinder.

As shown in FIG. 2, the guide part 30 is a hollow tube whose both ends have an outer diameter that becomes smaller toward the tip end and whose both ends are open. It abuts against the tip of the hollow cylindrical cylinder so as to prevent backflow of air through the valve 22, and the tip abuts against the fixed tube 31. The fixed tube 31 is connected to the guide part 30 at the rear end and penetrates from the outside to the inside in the same axial direction as the winding part 40 and the support part 27 on the outer peripheral surface, and the inner diameter is such that only one lead wire 42 can pass through. A lead-in portion 311 is provided, and is further connected to a flexible hose 32 having a hollow end and open ends. The flexible hose 32 is provided with a plurality of rings 321 each having a larger outer diameter from the front end to the rear end. The rings 321 are in close contact with the inner surface of the conduit so that the air inside does not escape.

The lead wire 42 passes through the wire support hole 271 and the introduction portion 311 of the support portion 27, enters the hollow portion inside the hose 32, and is pulled out from the tip end opening of the hose 32. It penetrates the center of the guide plug 45 and is connected to the hook 44. The guide plug 45 is made of an elastically deformable material so that the outer peripheral surface is in close contact with the conduit, the inner surface and the outer surface can be turned inside out, and the tip of the guide plug 45 is directed forward or backward.

The operation of the above-described configuration of the present invention will be described below. As shown in FIG. 3, first, the conduit 52 previously embedded in the wall 51 is bent into the conduit 52 by utilizing the flexibility of the hose 32, and the inner wall of the conduit 52 is fitted by the ring 321 at the tip thereof. Close to. When the hand grip 25 is propelled in the forward direction, the elastic pad component 231 blows the air inside the cylinder 20 into the hose 32 through the vent hole 221. Then, the air is sent out from the outlet of the hose 32 and blown out to the conduit 52, and the guide plug 45 can be pushed in the forward direction by the blowing pressure of the air.

Next, when pulling the hand grip 25 in the backward direction, the air in the conduit 52 does not flow back due to the check flow of the check valve 22. Further, the elastic pad component 231 contracts internally due to its elastic function and allows the outside air to flow into the ventilation passage 21, facilitating the backward movement of the hand grip 25.

By repeating the forward and backward movements of the hand grip 25 as described above, the guide plug 45 advances, and the leading wire 42 is pulled out to the front end of the conduit 52 as the guide plug 45 advances. Then, as shown in FIG. 4, by connecting the wire 53 to the wire hook 44 and turning the crank handle 43, the lead wire 42 is pulled back and collected, and the wire 53 is drawn to the outlet 54 of the conduit 52 on the wall 50. Can be done easily.

Further, since the hose 32 has a flexible property, even if the outlet 54 of the conduit 52 is installed in the hole 51 of the wall 50, the hose itself is bent so that the air does not easily leak out. 54 can be fitted.

Further, as shown in FIG. 1, a clip 26 may be installed at the rear end of the hollow cylindrical cylinder. As a result, the wire threading device of the present invention has high mobility so that it can be easily carried. The present invention is not limited to the above-described embodiments, but all the means and spirits of the present invention are within the scope of the present invention.

[0020]

According to the wire threading device in the conduit of the present invention, a check valve is provided in the front part of the air passage of the cylindrical cylinder, and a guide part for guiding the lead wire is provided, and the guide part is flexible. By connecting a flexible hose, the hose can be fitted to any conduit at any installation angle, and the air can be blown into the conduit by the cylinder to transport the guide plug and easily. Wires can be passed through the conduit, which contributes to the efficiency of electrical wiring.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a wire threading device of the present invention.

FIG. 2 is a vertical cross-sectional view of the wire threading device shown in FIG.

FIG. 3 is a schematic vertical cross-sectional view showing a state in which the wire threading device of the present invention has extruded the lead wire to the tip of the conduit.

FIG. 4 is a schematic vertical cross-sectional view showing a state in which the wire threading device of the present invention manually retracts the wire through the lead wire and the guide plug.

FIG. 5 is a perspective view showing a conventional wire threading device.

[Explanation of symbols]

 20 ... Cylinder 21 ... Ventilation path 22 ... Check valve 23 ... Piston 24 ... Interlocking rod 25 ... Hand grip 26 ... Clip 27 ... Support part 30 ... Guide part 31 ... Solid tube 32 ... Flexible hose 40 ... Winding part 41 ... Spool 42 ... Lead wire 43 ... Crank handle 44 ... Wire hook 45 ... Guide plug 52 ... Conduit

Claims (5)

[Utility model registration claims] 1. A cylindrical cylinder having an air passage inside is provided, a hollow guide portion communicating with the air passage is provided at a front end portion thereof, and a winding portion for winding a lead wire is attached at an upper side thereof. In the wire threading device in the conduit, in which the leading wire is inserted into the guide part and pulled out from the opposite end, and the guide plug is locked to the tip end of the guide wire, the cylinder is reversely attached to the front end of the internal air passage. Equipped with a valve,
The rear end portion is provided with an interlocking rod protruding to the outside of the cylinder and connecting a hand grip to the end, and a piston connected to the interlocking rod, and a support portion having a wire support hole for guiding the lead wire on the outer periphery of the front end portion of the cylinder. Is provided, and the tip of the guide portion has flexibility capable of being bent according to the mounting angle of the conduit, and
The hose is equipped with a plurality of sealing rings fitted to the conduit at the tip of the opening, the outer diameter of which becomes larger as the latter becomes closer to the conduit, and the guide plug is pushed by pushing the grip to introduce air into the conduit. A wire threading device in a conduit, wherein the wire can be rapidly pumped along the inside of the conduit. 2. The guide plug has a tip having a substantially conical outer shape, is made of an elastically deformable material, and has an inner surface and an outer surface that can be turned upside down, and the direction of the tip is either forward or backward. The wire threading device in the conduit according to claim 1, wherein the wire threading device is capable of facing. 3. The wire threading device for a conduit according to claim 1, wherein a grip member is provided at a terminal end of the cylindrical cylinder. 4. A wire support hole for guiding a lead wire is provided on an upper side of a front end portion of the cylindrical cylinder, and a fixed pipe provided at a tip of the guide portion is provided with an introducing portion for introducing the lead wire. A wire threading device in a conduit according to claim 1. 5. The wire threading device for a conduit according to claim 1, wherein the interlocking rod is provided with a stop projection near the hand grip to prevent the slippage into the cylinder.