JPH10157493A - Device and method for molding hanger bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure an accurate interval between a catenary wire and and a trolley wire in a hanger bar after molding of a loop, related to a device and a method for molding the hanger bar in which the trolley wire is hung from the catenary wire. SOLUTION: Two hole shafts A, B, a guide pin 2, and a curve receiving block 3 are provided on a working table 1 as in conventional cases, and in addition a rail 4 is laid on a line connecting the hole shafts together and a supporter 5 movable along the rail 4 is provided. A subject for machining has its ear fixed on the supporter and has its straight bar part laid on the working table. In that case, the supporter is positioned and fixed by an added scale so that the distance from the hole shaft to the ear is (n). When a loop is formed under this condition, a hanger bar does not move during machining and an accurate loop and length (n) can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for forming a hanger bar for suspending a trolley wire from a suspension wire. It is intended to be.

[0002]

A hanger bar suspends a trolley wire from a suspension wire. However, since the suspension wire has a catenary curve and the trolley wire is straight, the hanger bar has a length corresponding to the mounting position. Are different. If you do not make it correctly, the trolley wire cannot maintain its level. The hanger bar H includes a loop portion and a straight bar portion as shown in FIG. 1, and an ear E is attached to a lower end of the straight bar portion. The top of the loop is inverted U
The V-shape and lower end form a V-shape, and one of the V-shapes is connected to a straight bar portion on the center line of the loop, and the other extends straight obliquely downward and then bends to lock the straight bar portion. Loop part is length C
Is constant. The straight bars have different lengths.
This is to cope with different distances I between the suspension wire and the trolley wire. In the installation work of the hanger bar, an object M having a length N with an ear E attached to the lower end of a straight bar is prepared in advance, as shown in FIG. 2, and is carried in to form a loop at the construction site. A conventional apparatus and method used for forming a hanger bar H from an object M will be described with reference to FIGS. The work table 1 is provided with two hole axes A and B each having a pin hole, a guide pin 2 and a bending receiving block 3. Lever F is pin F1
And a roller F2, which are separately prepared. The pin F1 of the lever F is inserted into the hole axis A, and the lever body is provided on a line connecting the hole axes A and B. A plurality of length dimension lines S are attached to the surface of the lever main body, and the distance from the hole axis A is selectable. The object M indicated by the chain line is inserted between the hole axes A and B and the guide pin 2 as shown in FIG. Thereafter, the pin F1 of the lever is inserted into the hole axis B, and the lever is rotated about 90 degrees as shown in FIG.
As a result, a lower side of the loop is formed as shown by the imaginary line in FIG. Next, when the pin of the lever is moved to the hole axis A and rotated, a U-shaped portion is formed as shown in FIG. The object M is rotated by 180 degrees around the center axis of the loop, and the operation shown in FIG. 4 is performed again to form another side of the lower portion of the loop.

The biggest problem in the above steps is that the target portion M is positioned in accordance with the length dimension line S. The length dimension line S must be adjusted to an appropriate position from among the plurality of length dimension lines for each different object M. The position is calculated based on the numerical table. Even though the calculation is simple, it is a cumbersome and tiring task because it is necessary each time.
Moreover, there is a risk of miscalculation. In some cases, the operator may overlook that the length N of the object M is too large or too small. Even if it is accurately applied to the length dimension line, a gap may occur before construction. In any case, the generated error is wrinkled in the ear direction, and an error that does not conform to the distance n between the suspension wire and the trolley wire is made. Simple positioning means have been desired.

[0004]

Conventionally, the loop is formed by positioning the object M based on the free end. All this was at the root of the problem. In the present invention, the reference point is set to the ear side. For this purpose, a supporter movable in the direction of the workbench is provided on a base below the workbench, and ears are fixed thereon, and the straight bar is laid on the workbench. In this state, the supporter is moved and adjusted in accordance with the scale on the base so that the distance between the ear and the hole axis becomes a predetermined length n (FIG. 1), and is fixed to the base. This eliminates the need for any numerical calculations. The positioning effort is eliminated, and a product always having the required length n can be obtained.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. The reference signs used in FIGS. The work table 1 is fixed on a base plate D via legs, and holes A,
B, a guide roller 2 and a bending receiving block 3 are provided. A rail 4 is laid on the base plate D on a line connecting the hole axes A and B. The supporter 5 is movable along the rail, and has an engaging portion such as a concave portion on the upper surface on which the ear E of the target portion M can be placed. A scale 6 is cut on the side of the rail so that the distance n from the center of the supporter ear to the center of the trolley line T on the supporter ear can be measured starting from a position considering the wire diameter radius a of the suspension line R outside the hole axis A. It is. Stabilizing plates 7 are attached to the bottom surfaces of both ends of the base plate D so as to be freely rotatable in the horizontal direction. Scales 6 are provided at both ends of the rails. is there. In other words, one scale measures a short hanger bar symmetrically with reference to the right end of the supporter 5,
On the other hand, a long hanger bar exceeding the work table 1 is measured symmetrically with reference to the left end of the supporter. The lever F has a pin F1 and a roller F2 at one end as shown in FIG. 8, and the pin F1 can be inserted into and engaged with any of the hole axes A and B. To use this device,
First, the bottom stabilizer 7 of the base plate D is alternately projected to both sides. Next, the object M is moved to the positioning locking portion of the supporter 5.
The straight bar is inserted between the hole axes A and B and the guide roller 2. The supporter is fixed to the base D after adjusting the outer side of the ear to be at a distance of n from the hole axis A as shown in FIG. Thereafter, a loop is formed using the lever F as shown in FIGS. At this time, if the stabilizer 7 is stomped on both feet, the device during processing can be easily fixed. After the loop is formed, one side of the V shape of the loop lower end is bent and engaged with the straight bar portion. However, since the object is a copper material, the end can be easily formed by using a pipe tool capable of inserting the end portion.

[0006]

The complete product can be obtained simply by placing the ear of the object on the supporter and fixing the position of the supporter to n on the scale. No calculations are required and there is no danger of making mistakes.

[Brief description of the drawings]

FIG. 1 is a front view of a hanger bar.

FIG. 2 is a front view of an object to be molded.

FIG. 3 is a state diagram for determining a conventional length dimension.

FIG. 4 is an explanatory diagram of loop forming.

FIG. 5 is an explanatory diagram of loop forming.

FIG. 6 is a front view of the molding apparatus.

FIG. 7 is a plan view of the same.

FIG. 8 is a front view of the lever.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work bench 2 Guide pin 3 Bending support block 4 Rail 5 Supporter 6 Scale 7 Stabilizer A Hole axis B Hole axis D Base plate F Lever F1 Pin F2 Roller R Suspension wire S Length dimension line T Trolley wire

Claims (2)

[Claims] An object to be processed is a straight bar having an ear attached to a lower end thereof, a base plate, two hole axes A and B fixed horizontally on the base plate, a guide pin, and a bending receiving block. A fixed worktable, a rail provided on the base plate on a line connecting the hole axes A and B, a supporter fixed to the base plate so as to be adjustable in position along the rail, and a supporter on which the ear portion of the object can be fixed; A scale extending in the supporter direction with the hole axis A as an origin, and a working lever provided at one end with a pin that can be selectively inserted into any of the hole axes A and B and a roller corresponding thereto at one end. Hung bar molding equipment. 2. A forming apparatus according to claim 1, wherein the straight bar is provided with an ear at the lower end thereof, and the loop is constant in length and the length from the ear end to the outer end of the loop is constant. When forming the hanger bar of n, the distance between the outer sides of the hole axes A and B is set to a fixed amount C, the supporter is transported along the rail to the scale graduation n and fixed to the base plate, and the ear part of the object is placed on the supporter. The bar is fixed on the workbench, and the pin of the lever is inserted into the hole axis B and rotated to the bending receiving block to form one corner of the lower part of the loop, and then the U-shaped part and the other lower part are formed. A method for forming a hanger bar in which one corner is formed.