JPH11191908A - Wire drawing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire drawing tool having good efficiency in easy and prompt wiring work, even at a rear side of roof, in a wall or even in a narrow space, and which is capable of functioning also as a tape measure. SOLUTION: A base part (a) is turned into a spline state around a center axle 12 rotatably put in a housing 11 of a hoop storing body 1. An intermediate part (c) comes out automatically from an opening 13 of the housing 11 and is wound back by turning a handle mechanism 15. An end (b) of a flexible hard metallic hoop material 2, on which the scales of measuring graduation are marked, has a wire fitting part 31 and a wire joining and guiding member 3 fixed or put in a removable state. The wire which joins and guides the member 3 is bent into a doglegged shape and has a slanted face 32 with respect to an elongated direction of the hoop material 2, and the wire fitting part 31 and the wire joining and guiding member 3 can move and slide over a rugged part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is used for wiring electric wires and telephone lines by passing through the space above a ceiling, inside a wall, inside a pillar, etc. of an existing building. The present invention relates to an electric wire attracting tool that enables measurement of a dimension of a portion according to the above.

[0002]

2. Description of the Related Art Among the conventional wire pulling tools of this type, a tool mainly used for wiring behind the ceiling is, as exemplified in FIG. Of the hook fitting 52 to the fixing fitting 5
3 is known which is fixed via a wire. In addition, as a tool having a different structure, a long strip material with a wire hooking and locking metal fitting attached to the tip is wound in a hoop shape and stored in a ring-shaped case, and the work is pulled out from the case during work. There is also a tool (not shown) that reaches the wire inlet and connects the wire to the locking metal fitting and pulls it closer.

In the conventional wiring tool using the former telescopic rod 51, when the rod 51 is extended long, it cannot be inserted into the ceiling from the small opening leading to the ceiling, so that the usual short tool is used. In the narrow ceiling, the rod 51 is sequentially extended from the tip rod 51a, and the tip of the rod is exposed to the wire insertion port so that the wire to be wired to the hook fitting 52 at the tip is inserted. After connecting the distal ends of the rods, the rods 51 were again contracted and stored in the back of the ceiling from the base rod side to shorten the rods 51 and draw the electric wires closer to the hands.

[0004]

Therefore, in the case of the conventional wiring tool using the telescopic rod 51, the operation of expanding and contracting the rod inside the narrow ceiling is extremely difficult, and it takes time and trouble, and the wiring is extended. Manipulating the tip of the rod while holding the base of the rod requires considerable effort and is highly fatigued. Moreover, since the weight of the rod that can be operated by holding the base of the rod in the narrow back of the ceiling is limited, the length of the rod cannot be lengthened unnecessarily. There is a fundamental drawback that the range in which the wiring operation can be performed using the telescopic rod is limited, and in the case of a tool with a structure in which a long strip of material is wound in a hoop shape and stored in a ring-shaped case. The hoop size is so large that it is difficult to handle on site, and it must be manually operated to move the strip out of the case, it is troublesome, and care must be taken to avoid injury. There was a problem that.

Accordingly, the present invention provides a telescopic rod,
The purpose is to solve the problems that conventional wiring tools had, and even in a narrow space such as the back of a ceiling, or in a narrow and small space inside a wall or a pillar, a great deal of labor is required. Wiring tools that can be easily and quickly wired without the need for improved wiring work, and that can be used as a measuring tape for measuring distances and dimensions at work sites. What you want to do.

[0006]

Means for Solving the Problems The structure of the wire pulling tool according to the present invention for achieving the above object will be described with reference to the reference numerals used in the embodiments.
The side is spline-wound around a rotatable central axis 12 provided in a housing 11 of the band material storage body 1, and a handle 15 for unwinding and unwinding an intermediate portion c by itself from an opening 13 of the housing 11. At the tip b of the elastic hard metal strip 2 having a structure with a scale 21 on its surface.
A shape provided with an electric wire locking portion 31 and whose longitudinal side surface is bent in a substantially "L" shape so as to form an inclined surface 32 with respect to the extending direction of the band material 2 and can slide over an uneven surface when moving. The wire connection guide fitting 3 is fixedly or detachably attached to the opening 11 of the housing 11.
A stopper 1 for restricting the strip 2 from moving back and forth inside
4 are provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In implementing this wiring tool, the band 2 is rotatable by providing a base end portion a and an intermediate portion c following the base portion a in a housing 11 of the band storage body 1 at the time of storage. Spline is wound around the center axis 12
At the time of use, the spline-wound intermediate portion c is made to retreat from the opening 13 of the housing 11, the intermediate portion c protruding from the housing 11 is formed in a rod shape, and the wire connection guide fitting 3 is propelled. Can be implemented.

The housing 11 may have a structure similar to an ordinary tape measure. For the sake of assembly, a pair of symmetrical container-shaped members made of synthetic resin is formed into a pair and wound around a central axis 12 by a spline. The band material 2 is housed so as to be sandwiched from both sides, and the band material storage body 1 is integrated with a connecting member such as a rivet or a small screw. For convenience in use, the band storage body 1 is provided with a handle mechanism 15 on the center shaft 12 for rewinding the band 2 unreeled by itself.
A stopper 14 having a push button structure is attached to the inside of the opening 13 of the housing 1 in order to freely move the band 2 when the band 2 moves out and to maintain the extended state during the wire connection operation. Further, if the stopper 14 is inadvertently released when the band 2 is stored and the band 2 is protruded, there may be a danger. Therefore, the end of the stopper 14 is locked to a part of the band 2. It is good also as a structure which makes it do.

The band 2 is made of a hard metal such as a steel plate or a stainless steel plate, and has a relatively small width of about 10 to 30 mm and a resiliently thin metal band of about 0.1 to 0.5 mm. The plate is preferable in that it has excellent self-repulsive force. Also, strip 2
Is extended so that the intermediate portion c becomes rod-shaped,
It is desirable that the cross-section of the strip 2 in a vertical plane in the longitudinal direction has an arc shape, a rectangular shape, and the like, and the strip 2 has a non-planar shape. Strip 2
When the spline is wound around the center axis 12, the cross section becomes straight against the self-repulsive force and is easily wound, but has the potential to straighten by the self-repulsive force, When the restraint of the stopper 14 is released, the stopper 14 is fed by itself. When the strip 2 comes out of the housing 11 and becomes straight, it returns to its original cross-sectional shape and becomes a rod-like shape, and faithfully transmits the propulsive force for extension.
Further, the scale 2 can be used as a tape measure by applying the scale mark 21 to the surface of the strip 2, which is convenient in that dimensions can be easily measured at a construction site or the like.

The wire connection guide fitting 3 may be made of metal or synthetic resin, but is preferably made of an iron plate from the standpoint of durability and price, and is provided with a wire locking portion 31 and extends in the direction in which the band 2 extends. On the other hand, the longitudinal side surface is bent in a substantially “C” shape so as to form the inclined surface 32, and has a shape that can slide over an uneven surface such as a ceiling when moving.
Therefore, the distal end of the wire connection guide fitting 3 is designed to be raised higher than the height of the uneven surface. The wire locking portion 31 may be formed by simply forming a simple hole 31 for tying up the wire at the end of the wire connection guide fitting 3, or may be a release hole 31b having a cutout portion in the hole. In addition, the wire connection guide fitting 3 includes the band material 2.
Mark 33 indicating the base point of the scale of the scale, that is, the tip of the measure
a is provided. Alternatively, a bent portion 33b that is vertical like a normal tape measure may be provided as a mark at the boundary between the inclined surface 32 and the mounting portion of the strip 2. The wire connection guide fitting 3 is attached to the end of the strip 2 with a rivet 34 or the like.
In the embodiment of the present invention, a part 34a of the rivet 34 is projected so as to be engaged with the end 14a of the stopper 14.

Since the present invention has such a structure, the band material storage body 1 is fixed at the work opening 40 provided in the ceiling or the like, or is held by hand. By holding and operating (stopper 14) the wire connection guide fitting 3 at the head, the intermediate portion c of the strip 2 is sequentially extended forward by itself by itself, so that the wire connection guide fitting 3 is attached to the ceiling space 41 or the like. The wire 44 is moved toward the front wire insertion port 43 while sliding over the uneven surface 42, and the leading end of the wire 44 to be wired to the hole 31 a of the guide fitting 3 is locked or tied at the wire insertion port 43. After that, the wire connection guide fitting 3 is drawn by sequentially drawing the payout side of the band material 2, and the wire 44 is drawn and wired. Further, the electric wire 44 to be wired is connected to the electric wire connection guide fitting 3 at the hand position, and the electric wire 44 is conveyed to a predetermined position by pushing out the band material 2 and moving the electric wire connection guide fitting 3 forward as described above. It can also be wired.

As described above, the electric wire pulling tool according to the present invention moves the electric wire connection guide metal fitting 3 attached to the front end of the stretchable strip 2 forward and backward, thereby moving the front end portion of the electric wire forward and backward, thereby reducing the required electric wire. Since it is designed to be pulled or transported, it can be operated very easily even in the case of wiring work such as in a narrow ceiling, so that the wiring work can be speeded up and facilitated. Since it is lightweight and small in volume, it is possible to wrap a long band 2 even in a small band storage case 1, so it is convenient to carry, but long range wiring that can not be reached with a rod It has features that it can be easily performed and is very convenient. It also has the advantage that it can be used as a measure other than the original work.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a perspective view and a cross-sectional view of the external appearance of a first embodiment of the present invention, and FIGS. 3 to 5 show three different cross-sectional structures of a strip 2 as a modification. FIG. 6 shows an example of use.

In the first embodiment, as shown in FIGS. 1 and 2, the housing 11 forming the band material housing 1 is made of a set of two symmetric container-shaped members made of synthetic resin. The strip 2 wound around the center shaft 12 is splined and housed so as to be sandwiched from both sides, and integrated with a connecting member such as a rivet or a small screw. The strip 2 can be unwound by its own force due to the self-repulsive force in the wound state, but a handle mechanism 15 is provided on the central shaft 12 for rewinding operation.

In order to move the strip 2 freely when the strip 2 moves out and back, to maintain the extended state when connecting the electric wires, and to prevent the strip 2 from being inadvertently projected when storing the strip 2, A stopper 14 having a push button structure is mounted inside the opening 13 of the eleventh embodiment. The stopper 14 prevents the inadvertent projection of the band 2 when the band 2 is stored by engaging the lower end 14 a with a rivet 34 for fixing the wire connection guide fitting 3 described later at an intermediate position thereof. When the stopper 14 is pulled forward, the lower end portion 14a releases the rivet 34a, and the strip 2 is fed out by itself.
When the strip 2 has been extended to a desired length, the stopper 14 is moved in the opposite direction to the front, so that the strip 2 is pressed by the lower end portion 14a to maintain the extended state.

The strip 2 is made of a steel plate having a width of about 25 mm.
The cross section is finished in an arc shape. The scale 2 can be used as a tape measure by applying a scale mark 21 to the surface of the strip 2. The strip 2 can be of any shape, including a flat cross section, but when it is extended, its middle part c becomes rod-shaped and the wire connection guide fitting 3 is strongly propelled. It is preferable that the cross-sectional shape of the strip 2 in the vertical plane in the longitudinal direction is not planar. 3 to 5 show modified examples of the cross-sectional shape for reference.
FIG. 3 shows a wave shape, FIG. 4 shows a mountain shape, and FIG. 5 shows a C-shaped curl. By applying these shapes to the strip 2 in advance, it can be fed out by its own repulsive force and restored to the original cross-sectional shape given at the time of extension, and the strip 2 can be held in a straight line to perform operations necessary for work. Convey power faithfully.

The wire connection guide fitting 3 is made of metal, and is suitably made of an iron plate from the standpoint of durability and price. A hole 31a is drilled at the end as a wire locking portion 31, and the strip 2 is extended. In order to form the inclined surface 32 with respect to the direction, the side surface in the longitudinal direction is bent so as to be substantially in the shape of "". At the rear end opposite to the inclined surface 32, an engaging portion with the band 2 is formed, and the band 2 is fastened to the band 2 with a rivet 34 at the joint. The rivet 34 is used for the stopper 1 described above.
4 is slightly protruded so as to be able to engage therewith. Further, a mark 33a for indicating the leading end of the measure indicating the 0 scale of the scale mark 21 of the strip 2 is engraved on the surface of the electric wire connection guide fitting 3.

FIGS. 7 to 9 show modified examples of the electric wire connection guide fitting 3. In the first embodiment, the electric wire locking portion 31 is a simple round hole, but in FIG. 7, the electric wire locking portion 31 is a release hole 31b in which a part of the hole is cut out. . In FIG. 8, the notch of the release hole 31b in which a part of the hole is cut is narrow, and the inside of the hole is widened. FIG. 9 shows that the shape of the electric wire connection guide fitting 3 is different. A vertical portion 33b bent at a right angle is formed on the back side of the band 2 at the leading end portion of the band 2 and the end of the vertical portion 33b. Slope 3 to the direction of extension of the strip 2 from
2 and a structure in which an electric wire locking portion 31 is provided at the distal end. This modification is a vertical part 3
The end face of 3b can be used as a mark for displaying a tip like a conventional measure.

As a modified example of the embodiment, although not shown, the handle mechanism 15 for driving the central shaft 12 to which the band 2 is pulled back is made free with respect to the central shaft 12 so that the central shaft 12 If the handle does not rotate even if it rotates, it is extremely convenient for performing the work. Although not shown in the drawing, as a modified example of the electric wire connection guide fitting 3, the electric wire connection guide fitting 3 is elongated, and the space between the attachment portion to the band material 2 and the inclined surface 32 is hollowed out.
If you store light sources such as light bulbs and switches,
By illuminating the light bulb, it is possible to proceed with the work while confirming the position of the tip of the electric wire attracting tool even at the time of wiring work such as behind a dark ceiling. Further, a clip 16 for portable use is attached to one of the housings 11 as shown by phantom lines in FIG. Further, a hanging rod 17 is formed at one corner of the band material storage body 1. Both structures are convenient to carry.

Although the embodiments and modifications which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments, but includes the above-mentioned constituent elements of the present invention. In addition, the present invention achieves the object of the present invention, and can be implemented with appropriate modifications within a range having the following effects.

[0021]

As is clear from the above description, the electric wire pulling tool according to the present invention moves the electric wire connection guide metal fitting attached to the end of the stretchable band material forward and backward to move the electric wire tip forward and backward. The wire is connected to the wire connection guide bracket to draw or transport the wire. Therefore, it is very easy to operate even the wiring work on the narrow ceiling, etc., and the wiring work is speeded up. And has a remarkable effect that it can be facilitated.

Further, since the band itself is lightweight and small in volume, a long band can be rolled up even in a small band storage case, so that it is convenient to carry and the conventional rod is used. It can easily perform wiring in a long range that cannot be reached by the above method, and has a feature that it is very convenient. In addition to the original work, the effect of being able to use it as a major can also be expected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a central longitudinal sectional side view of the whole in FIG.

FIG. 3 is a cross-sectional view of a first modification of the band material.

FIG. 4 is a cross-sectional view of a second modification of the belt.

FIG. 5 is a sectional view of a third modification of the band material.

FIG. 6 is a partially interrupted side view showing a use state.

FIG. 7 is a plan view of a first modification of the electric wire connection guide fitting.

FIG. 8 is a plan view of a second modification of the electric wire connection guide fitting.

FIG. 9 is a perspective view of a third modification of the electric wire connection guide fitting.

FIG. 10 is a partially interrupted side view showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 band storage body 11 housing 12 center axis 13 opening 14 stopper 15 handle mechanism 16 clip 17 hanging rod 2 band 21 scale scale 3 wire connection guide fitting 3 31 wire locking portion 32 inclined surface 33 mark 34 rivet

Claims (1)

[Claims] 1. A base end (a) side is spline-wound around a rotatable central axis (12) provided in a housing (11) of a band material storage body (1), and an intermediate part (c). Is provided with a handle (15) for unwinding and rewinding by itself from the opening (13) of the housing (11), and can be stored by its operation,
An elastic hard metal strip (2) having a scale (21) on its surface is provided with an electric wire locking portion (31) at the tip end (b) of the strip (2) and extends the strip (2). A wire connection guide fitting (3) with a shape that can be slid over a concave and convex surface when moving so that the longitudinal side surface is bent in an almost “L” shape so as to form an inclined surface (32) with respect to the direction An electric wire pulling tool which is attached so as to be capable of being provided with a stopper (14) inside the opening (13) of the housing (11) for restricting the strip (2) from moving back and forth.