JP7701010B2 - Gold Car Cover - Google Patents

Description

The present invention relates to a pulley cover that is attached to a pulley on which a wire rope is attached.

In power line construction, metal wagons are used to transport objects to their destination, such as lifting heavy objects from the ground to the top of a tower. More specifically, metal wagons have a rope ring with a wire groove formed in it, and the central axis of the rope ring is suspended by a hoisting device, allowing it to rotate freely. This allows the wire rope to be pulled in to lift the object to its destination, or the wire rope to be let out to lower the object to its destination.

When operating the pulley, if the worker's body or clothing (hereinafter referred to as "clothing, etc.") comes into contact with the rotating rope, the clothing, etc. will become entangled in the wire rope and rope. To prevent such an incident, for example, Patent Document 1 discloses a "pulley device with a safety cover." The safety cover in the pulley device of Patent Document 1 includes "an arm, part of which is rotatably supported on the central axis of the pulley, and a surrounding device that is fixed to the arm and surrounds the wire wound around the pulley."

The enclosure in Patent Document 1 has a pair of main body parts and an opening/closing piece for attaching and detaching the wire that can be opened and closed relative to the main body parts, and the wire is inserted into the space formed by them. When the angle of the wire changes, the enclosure moves following the wire, and the wire becomes enclosed by the enclosure.

JP 2011-072150 A

In power line construction, wire ropes are replaced very frequently. In the pulley device of Patent Document 1, the opening and closing piece must be opened and closed every time the wire rope is replaced, which is a frequent hassle. In addition, in Patent Document 1, the fastener must be stopped after closing the opening and closing piece, but if the fastener is forgotten to be stopped, the opening and closing piece will be in an open state and the enclosure will no longer follow the wire rope. This leaves the wire rope exposed, making it impossible to prevent the worker's clothing, etc. from becoming entangled in the wire rope and rope ring. In addition, if the wire rope is surrounded by the enclosure as in Patent Document 1, it becomes difficult for the worker to see the wire rope, which raises concerns about reduced workability.

In view of these problems, the present invention aims to provide a pulley that can reduce the labor required to change the wire rope while preventing the worker's clothing from becoming entangled between the wire rope and the pulley's rope ring.

To solve the above problems, a typical configuration of the iron wheel cover according to the present invention is an iron wheel cover that is attached to an iron wheel carrying a wire rope, and is characterized by having a pair of side walls arranged at different angles to the axis of the iron wheel and arranged on the front and back of the iron wheel, two sets of arms rotatably attached to the axis of the iron wheel, a pin that connects the pair of side walls, and a spring that rotates the arms to bias the pins against the wire rope.

The pair of side walls are provided with flanges that approach each other on the edge opposite the spring relative to the pin, and a gap is formed between the opposing flanges through which the wire rope can pass.

The present invention makes it possible to provide a pulley that can reduce the effort required to change the wire rope while preventing the worker's clothing from becoming entangled between the wire rope and the pulley's ring.

FIG. 2 is an overall perspective view of a caster wheel and a caster wheel cover according to the present embodiment. 2A and 2B are a front view and a side view of a caster wheel and a caster wheel cover according to the present embodiment. 13A and 13B are diagrams illustrating an example of a state of the iron wheel cover when the iron wheel is in operation.

The preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. The dimensions, materials, and other specific values shown in the embodiment are merely examples to facilitate understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid duplicated explanations, and elements not directly related to the present invention are not illustrated.

Figure 1 is an overall perspective view of the wheel 10 and the wheel cover 100 according to this embodiment. Figure 1(a) illustrates the wheel 10 and the wheel cover 100 as viewed obliquely from above, and Figure 1(b) illustrates the wheel 10 and the wheel cover 100 as viewed obliquely from below. Figure 2 is a front view and a side view of the wheel 10 and the wheel cover 100 according to this embodiment. Figure 2(a) is a front view of the wheel 10 and the wheel cover 100 according to this embodiment, and Figure 2(b) is a side view of the wheel 10 and the wheel cover 100 according to this embodiment.

As shown in Figures 1(a) and (b), the pulley cover 100 of this embodiment is attached to the pulley 10 on which the wire rope 20 (see Figure 3) is attached, and covers the portion of the wire rope 20 that is hung on the pulley 10. In detail, the pulley 10 is composed of a rope ring 12 in which a groove 12a (see Figure 2(b)) in which the wire rope 20 is attached is formed, and a pair of side plates 14 arranged to sandwich the rope ring 12.

As shown in Figures 1 and 2, the pulley cover 100 of this embodiment is composed of two pairs of arms 110a and 110b. The two pairs of arms 110a and 110b are arranged at different angles to the shaft 10a of the pulley 10 (strictly speaking, the shaft of the rope ring 12) and are attached to the shaft 10a of the pulley 10 so as to be freely rotatable.

The two sets of arms 110a and 110b each have a pair of side walls 112 and 114 arranged on the front and back of the pulley 10. The pair of side walls 112 and 114 are connected by a pin 120. A spring 130 (torsion spring) is attached to the shaft 10a of the pulley 10, and the spring 130 engages with the side walls 112 of the arms 110a and 110b. The spring 130 rotates the arms 110a and 110b, biasing the pin 120 against the wire rope 20.

In this embodiment, the spring 130 is engaged with the side wall 112 on the front side of the figure, but this is not limited to this, and the spring 130 may be engaged with the side wall 114 on the back side of the figure. In addition, in this embodiment, the spring cover 100 is provided with one spring 130, but this is not limited to this, and it is also possible to provide a spring on both the side wall 112 on the front side of the figure and the side wall 114 on the back side of the figure.

Figure 3 is a diagram illustrating the state of the pulley cover 100 when the pulley 10 is in operation. Figure 3(a) illustrates the case where the opening angle of the wire rope 20 relative to the shaft 10a of the pulley 10 is α, and Figure 3(b) illustrates the case where the opening angle of the wire rope 20 relative to the shaft 10a of the pulley 10 is β. Note that the opening angle is set to "α>β".

As shown in FIG. 3(a), when the opening angle of the wire rope 20 is α (when the opening angle is wide), the pair of arms 110a and 110b are rotated in the rotation direction D1 by the biasing force of the spring 130. As a result, the pin 120 attached to the pair of arms 110a and 110b rotates in the rotation direction D2, and the pin 120 comes into contact with the wire rope 20.

As shown in FIG. 3(b), even when the opening angle of the wire rope 20 is β (when the opening angle is narrow), the pair of arms 110a and 110b are rotated in the rotation direction D1 by the biasing force of the spring 130. In this case, too, the pin 120 attached to the pair of arms 110a and 110b rotates in the rotation direction D2, and the pin 120 comes into contact with the wire rope 20.

In other words, in the pulley cover 100 of this embodiment, even if the opening angle of the wire rope 20 changes, the pair of arms 110a and 110b rotate to follow the wire rope 20 due to the biasing force of the spring 130. The pin 120 is biased by the biasing force of the spring 130 received through the pair of arms 110a and 110b, and is always in contact with the wire rope 20. As a result, regardless of the opening angle of the wire rope 20, the wire rope 20 is surrounded by the side walls 112 and 114 in the vicinity of the pulley 10. Therefore, it is possible to prevent the fingers or clothing of the worker from getting caught between the wire rope 20 and the rope wheel 12 of the pulley 10.

Furthermore, in the pulley cover 100 of this embodiment, as shown in Figs. 1(a) and (b), the pair of side walls 112 and 114 are provided with flanges 116 and 118 that approach each other on the edge opposite the spring 130 with respect to the pin 120. A gap G is formed between the opposing flanges 116 and 118, through which the wire rope 20 (see Fig. 3) passes.

According to this configuration, the wire rope 20 can be placed inside the pulley cover 100 through the gap G. Therefore, with the pulley cover 100 of this embodiment, it is not necessary to attach/detach or open/close the pulley cover 100 when changing the wire rope 20 to the pulley 10. This reduces the effort required to change the wire rope 20, and improves work efficiency. In addition, since the flanges 116 and 118 are formed, contact between the wire rope 20 and the clothes of the worker can be more effectively prevented, and since the wire rope 20 can be visually confirmed from the gap G, the condition of the wire rope 20 can be easily confirmed.

The caster wheel cover 100 of the present invention has a simple structure that only requires attachment to the shaft 10a, and does not require any special structure in the caster wheel 10 itself. Therefore, it can be attached to existing caster wheels 10 or caster wheels 10 of any manufacturer.

Although the preferred embodiment of the present invention has been described above with reference to the attached drawings, it goes without saying that the present invention is not limited to the examples described. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention.

The present invention can be used as a pulley cover that is attached to a pulley carrying a wire rope.

10...wheel, 10a...shaft, 12...cable ring, 12a...groove, 14...side plate, 20...wire rope, 100...wheel cover, 110a...arm, 110b...arm, 112...side wall, 114...side wall, 116...flange, 118...flange, 120...pin, 130...spring

Claims (2)

A pulley cover attached to a pulley on which a wire rope is hung,
Two pairs of arms are arranged at different angles relative to the axis of the iron wheel, each pair having a pair of side walls arranged on the front and rear of the iron wheel, and are rotatably attached to the axis of the iron wheel;
A pin connecting the pair of side walls;
a spring that rotates the arm to bias the pin against the wire rope ,
A pulley cover characterized in that no other pins are provided on the pair of side walls on the opposite side of the pin that is urged against the wire rope with respect to the wire rope . The castor cover according to claim 1, characterized in that the pair of side walls are provided with flanges approaching each other on the edge opposite the spring with respect to the pin, and a gap is formed between the opposing flanges through which the wire rope passes.

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