JPH09200903A - Collector of trolley wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optimize the contact pressure with a trolley wire by arranging a tensile coil spring to draw the head of an arm to the side of a swivel, between the swivel and the spring lock of the arm. SOLUTION: A swivel 3 is attached to the body frame 1 through a swivel shaft 4. Then, the insertion piece 54 on the base side of an arm 5 is inserted into an arm lock hole 35. The lock piece 54 of the arm 5 is shifted a little after insertion with the wide part of the arm lock hole 35, and the lock groove is set to the small-with part at an arm lock hole 35, whereupon the lock piece 54a of this small-width part locks, and it serves as a slip stopper, and this allows vertical rocking, with this lock piece 54 as a fulcrum. Next, the hook 7a of a tensile coil spring 7 is hooked in the spring hole 34 of the swivel 3. Then, the coil spring 7 is pulled, and the other hook is hooked on the spring lock piece 52 on the side of the arm 5, and the arm 5 is pulled to the side of the swivel 3, thus upward rocking force is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector for a trolley wire or an insulated trolley wire (hereinafter, simply referred to as "trolley wire"), and in particular, it is suitable for a trolley wire as well as having a small number of parts to simplify assembly. The present invention relates to a current collector for a trolley wire, which is brought into contact with a pressure contact force.

[0002]

2. Description of the Related Art Conventionally, power is supplied to cranes and hoists.
A current collector as shown in FIG. 7 is employed as a device for contacting a trolley wire or an insulated trolley wire arranged along the traveling direction of a traveling body such as a crane to supply power to the crane side. This current collector is equipped with a body frame that is fixed on the load side of a traveling body such as a crane, with its vertical axis pivotable, and an arm with a tension spring is attached to this vertical axis so that it can be raised and lowered, and a collector is attached to the tip of this arm. Is provided. Therefore, the collector slides on the stretched trolley wire to collect a desired current.

[0003]

In the conventional trolley wire current collector described above, the vertical axis represents the base end side of the arm and the vertical axis,
Since the arm is mounted so that it can be elevated by means of a pin or a mounting shaft that penetrates between the end portions of the arm, the number of parts is large and assembly is labor-intensive. Moreover, since the pin is inserted through the engagement between the arm end and the vertical axis, the arm is supported by the surface contact, and the friction resistance increases when the arm swings. For this reason, a force is always applied to the arm tip end side in the upward direction, and the tensile force of the spring provided so as to contact the trolley wire at a predetermined pressure is strengthened in consideration of this frictional resistance. Therefore, there is a problem that the contact pressure on the trolley wire becomes strong and wear of the trolley wire and the current collector is increased. The present invention
The problems of the conventional trolley wire current collector are solved, the number of parts used is reduced, the assembly is simple and quick, and the contact pressure to the trolley wire is not increased more than necessary. An object is to provide a current collector for a trolley wire.

[0004]

In order to achieve the above object, a trolley wire current collector of the present invention has an upper portion having a spring engaging portion and a lower portion having an arm engaging portion having a shape in which a lower hole width is narrowed. A swivel having a hole formed therein, a locking piece inserted and locked in an arm locking hole formed in the swivel at the base end, a spring locking portion formed at the tip, and a collector provided at the tip. It is characterized by comprising an arm and a tension coil spring which is disposed between the swivel and the spring locking portion of the arm and biases the tip of the arm so as to draw it toward the swivel side.

The trolley wire current collector of the present invention having the above-described structure uses all the tools only by inserting the insertion locking piece at the base end of the arm into the trapezoidal arm locking hole on the swivel side. The arm can be locked with the swivel without being pulled, and since it is always pulled toward the swivel side by the tension coil spring, the arm can be made swingable and supported by the swivel, which simplifies the configuration and assembly, and also the swinging of the arm. Since it can be performed smoothly, the arm can be supported by adjusting the pressure contact force with the trolley wire to be optimum.

In this case, the arm locking hole is formed in a trapezoidal shape, and the locking piece at the base end of the arm can be inserted into the wide width portion of the trapezoidal arm locking hole, and is locked at the narrow width portion. It can be shaped like a bag.

In the trolley wire current collector of the present invention having the above structure, the arm locking hole provided on the swivel side has a trapezoidal shape with a wide upper side and a narrow lower side. Simply insert the locking piece at the base end and shift the position of this arm to the lower side, the locking piece of the arm is locked in the trapezoidal arm locking hole, and the arm is easily and quickly supported by the swivel. At the same time, the base end side of the arm can swing vertically in the gap between the upper edge and the lower edge of the arm locking hole.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a current collector for a trolley wire of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a fixed frame which is fixed to a traveling body side of a crane, a hoist club, a trolley or the like via a mounting band 2 and a fixing bolt 2B, and a swivel shaft 4 rotatably supported on the fixed frame 1. Install the swivel 3. This rotates the fixed frame 1 but fixes the horizontal piece 31 of the L-shaped swivel 3 by, for example, caulking the upper end of the swivel shaft 4 provided in a retaining shape. It can be pivotally rocked with respect to the fixed frame 1 as a center.

As shown in detail in FIG. 5, the swivel 3 is bent into a horizontal piece 31 to connect a vertical piece 32 to form an L-shape, and the horizontal piece 31 has a swivel shaft insertion hole 3H penetrating the swivel shaft. And a pair of ribs 33 for bending and reinforcing side edges on both sides from the horizontal piece 31 excluding the tip end to the vertical piece 32 at the bent portion of the horizontal piece 31 and the vertical piece 32. The spring locking holes 34, 34 are bored, respectively, and the lower end of the vertical piece 32 is bored with a trapezoidal arm locking hole 35 for inserting and locking the arm base end portion. This arm locking hole has a large upper hole width and a narrow lower hole width, and a trapezoidal shape, as well as a large upper hole width.
It is also possible to have a T shape in which the width of the lower hole is narrow.

As shown in FIGS. 1 and 4, the arm 5 has a U-shaped cross section by excluding the lower end portion and bending both side edges over substantially the entire length to form a pair of side pieces 51, 51.
The arm main body may be bent as shown in the figure in addition to the linear shape, and a pair of spring locking pieces 52 are formed at a part of the tip end portion, and a collector mounting hole 53 is bored at the tip end. The base end is the arm locking hole 3 of the swivel.
5, a hook-shaped locking piece 54 is provided so as to be inserted and locked. As shown in detail in FIG. 4A, this locking piece 54 has dimensions such that the outer widths of the engaging pieces 54a, 54a projecting on both sides are smaller than the wide portion of the arm locking hole 35 and larger than the narrow portion. The width of the engaging grooves 54b, 54b following the engaging piece is smaller than the narrow width part of the arm engaging hole, and the reinforcing plate 6 is arranged along the inserting engaging piece 54 as necessary. And

A tension coil spring 7 is arranged between the tip of the arm 5 and the swivel 3. This tension coil spring 7 is formed with a pair of hooks 7a, 7a at both ends, and each hook 7a is formed with a spring locking piece of an arm and a spring locking hole 3 of a swivel.
It is assumed that the arm is pulled toward the swivel side by a tension coil spring and a predetermined upward force is applied at this time.

A collector supporting shaft 8 is rotatably mounted in a collector mounting hole 53 at the tip of the arm 5, a collector mounting base 9 is mounted on the collector supporting shaft 8, and a collector 11 is provided on the collector mounting base. 10 is attached so as to be swingable.

Therefore, in order to assemble the above-mentioned components, the swivel 3 is attached to the main body frame 1 via the swivel shaft 4, and the arm is provided with a collector mount and a collector via a collector support shaft. The attachment is performed, and the insertion piece 54 on the base end side of the arm is inserted into the arm locking hole 35. At this time, when the locking piece of the arm is inserted in the wide portion of the arm locking hole and then moved a little to insert the locking groove into the small width portion of the arm locking hole, the engaging piece 5 is inserted into this small width portion.
4a is locked to prevent it from coming off, but the locking piece is used as a fulcrum to allow vertical swinging.

Next, one hook 7a of the tension coil spring 7 is hooked in the spring locking hole 34 of the swivel. Then, the coil spring is pulled and the other hook is hooked on the arm-side spring locking piece 52. At this time, the pulling force of the coil spring acts on the arm so that the arm is always pulled toward the swivel side so that the arm does not separate from the swivel, and the upward swinging force acts on the arm. This upward acting force is predetermined by the pressure contact force with which the current collector in the collector is in pressure contact with the trolley wire.

[0015]

According to the current collector for a trolley wire of the present invention, the locking piece at the base end of the arm is placed on the swivel side in a shape such that the lower hole width is narrow, for example, in a trapezoidal arm locking hole. After inserting, the tension coil spring can be locked to the swivel without using any tools by simply locking the tension coil spring to the water part and arm side respectively, and the tension coil spring is always pulled to the swivel side. Therefore, the arm can be swung to support it without coming off the swivel, the number of parts is reduced, the structure and assembly are simplified, and the arm can be swung smoothly. Therefore, the pressure contact force with the trolley wire is optimized. There is an advantage that the arm can be supported by adjusting so that

According to the trolley wire current collector according to the second aspect of the present invention, the arm locking hole provided on the swivel side has a shape such that the upper side is wide and the lower side is narrow. After inserting the locking piece on the arm base end side into the locking hole, the arm can be easily and quickly supported by the swivel simply by shifting the position of the arm downward, and the upper edge of this arm locking hole can be easily supported. There is an advantage that the base end side of the arm can be swung smoothly in the vertical direction in the gap between the lower edge and the lower edge.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a trolley wire current collector of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

4A and 4B are explanatory views of the arm, in which FIG. 4A is a plan view and FIG. 4B is a vertical sectional front view.

5A and 5B are explanatory views of a swivel, in which FIG. 5A is a partially cutaway front view, FIG. 5B is a side view, and FIG.

6A and 6B are explanatory views showing a usage state of the current collector of the trolley wire of the present invention, wherein FIG. 6A shows a state in which the trolley wire is pushed down, and FIG. 6B shows a state in which the trolley wire is pushed up.

FIG. 7 is an explanatory diagram of a conventional trolley wire current collector.

[Explanation of symbols]

 1 Body Frame 2 Mounting Band 3 Swivel 31 Horizontal Piece 32 Vertical Piece 33 Rib 34 Spring Locking Hole 35 Arm Locking Hole 4 Swivel Shaft 5 Arm 51 Side Piece 52 Spring Locking Piece 53 Collector Mounting Hole 54 Locking Piece 54a Engagement Piece 54b Locking groove 6 Reinforcement plate 7 Tensile coil spring 8 Collector support shaft 9 Collector mount 10 Collector 11 Current collector 12 Trolley wire

Claims (2)

[Claims] 1. A swivel having a spring locking portion formed at an upper portion thereof and an arm locking hole having a narrowed downward hole width formed at a lower portion thereof, and the arm locking hole formed at a base end of the swivel. ,
The locking piece to be locked is disposed between the swivel and the spring locking portion of the arm, and the arm having the spring locking portion formed at the front end and having the collector at the leading end. A current collector for a trolley wire, comprising a tension coil spring that urges the coil to pull toward. 2. The arm locking hole is formed in a trapezoidal shape, and
2. The trolley wire current collector according to claim 1, wherein a locking piece at a base end of the arm is insertable in a wide width portion of the trapezoidal arm locking hole, and has a hook shape which is locked in a narrow width portion. apparatus.