JP7032190B2 - Train line tension balancer - Google Patents

Description

The present invention relates to a tension balancer that holds a train line that expands and contracts due to a temperature change or the like to a structure with a constant tension.

For overhead lines such as train lines, especially trolley lines, the tension is affected by expansion and contraction due to temperature changes, elastic elongation due to creep and wear, and inclination of the support due to aging, so the tension is kept within a certain range. Need to hold. Therefore, various tension balancers have been conventionally proposed.
The tension balancer described in Patent Document 1 includes a cylindrical spring case supported by a structure, a frame fixed to one end side of the spring case, and a rotating arm pivoted to the frame at a first pivot point. , One end is pivotally attached to the second pivot point of the rotary arm, the tension rod extends through the lid and extends inside the spring case, and the other end is provided with a spring retainer, and the spring retainer and the lid of the spring case. It is equipped with a coil spring inserted between them, and the train line is fastened to the third pivot point of the rotating arm.

Japanese Unexamined Patent Publication No. 2014-189112

In the above-mentioned conventional tension balancer, when the train line is positioned at a predetermined holding position, a pulling tool is attached between the rotating arm and the train line and the tension rod is pulled out to extend the coil spring and rotate. After determining the rotation position of the arm, the end of the train line is connected to the rotation arm. However, it is not easy to install or remove the pulling tool in a state where the pulling force of the train line and the spring force of the coil spring are attracted to each other. Further, when the train line is broken, a large force is required to pull out the tension rod due to the structure provided with the contracted coil spring, and it is not easy to pull out even if a pulling tool is connected. Furthermore, it is desirable to temporarily reduce the tension of the train line in order to work safely during the construction of the train line, but there is a problem that it is not possible to quickly respond to such a temporary change in tension. ..
Therefore, according to the present invention, it is easy to attach / detach the pulling tool for positioning the holding position of the train line, and even when the train line is broken, the determination of the holding position of the train line is not hindered, and the tension of the train line is temporary. The purpose is to provide a tension balancer that can be easily changed.

In order to solve the above problems, the tension balancer 1 of the present invention is provided with a lid 3 having an opening 4 on one end side in the axial direction, and is provided with a cylindrical spring case 2 supported by a structure and a lid of the spring case 2. It has a frame 7 fixed to the outside of 3 and three first to third pivot points 22, 23, 24 arranged at each apex of the unequal side triangle, and the main axis at the first pivot point 22. One end is pivotally attached to the second pivot point 23 of the rotary arm 8 by the rotary arm 8 pivotally attached to the frame 7 and the spring case 11 through the opening 4 of the lid 3 of the spring case 2. A tension rod 10 extending inside 2 and having a spring retainer 12 at the other end thereof, and a coil spring 13 inserted between the spring retainer 12 and the lid 3 of the spring case 2 are provided. The tension balancer 1 supports the train line W whose one end is held by the third pivot point 24 of the rotary arm 8 to the structure while maintaining a substantially constant tension regardless of the amount of expansion and contraction thereof. The rotary arm 8 and the spring case 2 are provided with mounting portions 25, 26, and 27 for mounting a traction device that pulls between them and positions the rotational position of the rotary arm 8 that holds the train line W, respectively.

The tension balancer of the present invention can be easily attached between the rotating arm and the spring case without connecting the pulling tool to the train line, and the rotating arm can be attached regardless of the connection of the train line to the rotating arm. It can be positioned, the detention position of the train line can be easily adjusted, and it is possible to quickly respond to the temporary reduction of tension during the construction of the train line.

It is a front view of the tension balancer which concerns on this invention. It is a side view of the tip part of a tension balancer. It is a perspective view of the upper part of the tension balancer of FIG. It is an exploded perspective view of a part of the tension balancer of FIG. It is a bottom view of the spring presser in the tension balancer of FIG.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the tension balancer 1 includes a cylindrical spring case 2 that is vertically supported by the structure. The spring case 2 is provided with a lid 3 having an opening 4 on one end side in the axial direction, and is fixed to the structure by the hanging straps 5 and 6.

The frame 7 is fixed to the outside of the lid 3 of the spring case 2. The frame 7 has a pair of parallel support plates 7a and 7b. The rotating arm 8 arranged between the support plates 7a and 7b is composed of a pair of parallel arm plates 8a and 8b having a substantially isosceles triangle shape. The rotating arm 8 is pivotally attached to the frame 7 by a spindle 9 at a first pivot point 22 near the apex of one of its isosceles triangles.

The tension rod 10 is pivotally attached to the rotating arm 8 by the rotating shaft 11 at a second pivot point 23 near the other apex of the isosceles triangle of the rotating arm 8. The other end side of the tension rod 10 penetrates the opening 4 of the lid of the spring case 2 and extends inside the spring case 2, and the other end is provided with the spring retainer 12.

A coil spring 13 is inserted between the spring retainer 12 and the lid 3 of the spring case 2. One end of the train line W is held by a third pivot point 24 near the other apex of the isosceles triangle of the rotating arm 8, and the train line W is held by the structure while maintaining a substantially constant tension regardless of the amount of expansion and contraction of the one end. Be done.

A traction device P for adjusting the holding position of the train line W held by the rotating arm 8 by rotating the rotating arm 8 is attached between the rotating arm 8 and the spring case 2. The traction device P includes a mounting arm C that projects from the rotary arm 8 to the wire drawing side, and a pulling tool S such as a wire tensioner or a chain block that is connected to the tip of the mounting arm C to pull and rotate the rotary arm 8. Equipped. The mounting arm C is configured by pivotally attaching the tip portions of a pair of lower pieces C2 parallel to the tip end portion of the upper piece C1. The base ends of the upper piece C1 and the lower piece C2 of the mounting arm C are located at two different points above and below between the first pivot point 22 and the third pivot point 24 of the rotary arm 8. , 26. The mounting portion 25 includes a pin hole 25a through which a pin 25b that pivotally supports the base end of the upper piece C1 is passed through. The mounting portion 26 includes a pin hole 26a through which a pin 26b that pivotally supports the base end of the lower piece C2 is penetrated. One end of the pulling tool S is connected to a mounting portion 27 located at the lower end of the spring case 2. The mounting portion 27 is configured by a pull tab provided with a wire connecting hole 27a.

As shown in FIG. 4, the guide pipe 14 is made of stainless steel, one end thereof is fixed to the inside of the lid 3 of the spring case 2, the inside of the coil spring 13 extends along the inside thereof, and the other end side is axially oriented. It has a pair of opposed notch grooves 15 that extend.

As shown in FIG. 5, the spring retainer 12 includes a ring member 16, a guide plate 17, and a pull tab 18.

The ring member 16 has an opening 19 having a diameter larger than the outer diameter of the guide pipe 14, and includes four spacers 20 arranged at equal intervals so as to slightly project into the opening 19. The spacer 20 is formed by bending a strip-shaped copper plate into an L shape, is hooked on the edge of the ring member 16 on the opening 19 side, and is sandwiched between the other end of the coil spring 13 and the ring member 16. The spacer 20 rubs against the outer periphery of the guide pipe 14 to prevent galling and seizure of both.

The guide plate 17 is provided so as to cross the opening 19 of the ring member 16 and engages with the notch groove 15 of the guide pipe 14 so as to be relatively movable in the axial direction of the guide pipe 14.

The tension rod 10 extends inside the guide pipe 14 and is coupled to the pull tab 18 of the spring retainer 12 by a pivot pin 21 on the other end side.

When the spring 13 is bent due to the contraction, the ring member 16 of the spring retainer 12 abuts on the guide pipe 14 via the spacer 20 to hold the center position of the coil spring 13. The sliding resistance between the ring member 16 and the guide pipe 14 is relatively small, and the reaction force due to contact can be ignored.

A traction device P can be attached between the attachment portions 25 and 26 of the rotary arm 8 and the attachment portion 27 of the spring case 2, and the attached traction device P can be removed. Therefore, with the train line W connected to the rotating arm 8, the pulling tool S is attached and pulled and loosened, the rotating arm 8 is rotated, the tension rod 10 is pulled out from the spring case 2, and the coil spring 13 is extended, and the train line W is used. The detention position of the can be adjusted in the front-back direction. Since the pulling tool S is attached between the rotating arm 8 and the spring case 2 without connecting to the train line W, the holding position of the train line W can be positioned even when the train line W is disconnected. Further, since the traction device P can be easily attached and detached, the construction work is performed by temporarily changing the holding position of the train line W on the rotary arm 8 to reduce the tension of the train line during the construction of the train line W. Can be done safely.

In the present embodiment, the tension balancer 1 in which the spring case 2 having the coil spring 13 built in the vertical direction is vertically supported by the structure is configured, but the present invention is not limited to this, and the coil spring is not limited to this. The spring case 2 having the 13 built in the horizontal direction may be a tension balancer that is horizontally supported by the structure.

1 Tension balancer 2 Spring case 3 Lid 4 Opening 5 Hanging strap 6 Hanging strap 7 Frame 8 Rotating arm 9 Main shaft (first pivot point)
10 Tension rod 11 Rotating shaft (second pivot point)
12 Spring retainer 13 Coil spring 14 Guide pipe 15 Notch 16 Ring member 17 Guide plate 18 Puller 19 Opening 20 Spacer 21 Pit pin 22 First pivot point 23 Second pivot point 24 Third pivot point 25 Mounting part 25a Pin hole 25b Pin 26 Mounting part 26a Pin hole 26b Pin 27 Mounting part 27a Wire connection hole P Towing device C Mounting arm S Pulling tool W Train line

Claims (1)

A cylindrical spring case that has a lid with an opening on one end side in the axial direction and is supported by the structure.
The frame fixed to the outside of the lid of the spring case and
A rotating arm having three first to third pivot points arranged at each vertex of an isosceles triangle and pivotally attached to the frame by a spindle at the first pivot point.
A tension rod having one end pivotally attached to a second pivot point of the rotating arm by a rotating shaft, extending through the opening of the lid of the spring case, extending into the spring case, and having a spring retainer at the other end.
A coil spring inserted between the spring retainer and the lid of the spring case is provided.
In a tension balancer that supports a train line whose one end is held to a third pivot point of the rotary arm to a structure while maintaining a substantially constant tension regardless of the amount of expansion and contraction of the train line.
A traction device that pulls between the rotary arm and the spring case to position the rotational position of the rotary arm that holds the train line.
The rotating arm and the spring case are provided with mounting portions for mounting the traction device, respectively.
The traction device includes a mounting arm whose base end is mounted on the rotary arm and overhangs on the extended side of the train line.
One end is provided with a pulling tool connected to the spring case and the other end is connected to the tip of the mounting arm.
One of the mounting portions for mounting the base end of the mounting arm is located at two different points between the first pivot point and the third pivot point of the rotary arm.
A tension balancer for a train line, characterized in that the other mounting portion for connecting one end of the pulling tool is located at the lower end portion of the spring case .

Images