JP2000296973A - Wire traction carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance safety against the disconnection of a wire. SOLUTION: One-side ends of a plurality of wires 7 disposed in parallel are connected to both ends of an equalizer beam 3, the central portion of the equalizer beam 3 is rotatably supported on a carriage frame 2 by a supporting part 4, and a stopper part 6 is formed which regulates the rotational angle of the equalizer beam 3. There are also provided a rotational angle detection means 17 detecting the rotational angle of the equalizer beam 3 and a turn buckle 14 serving as a wire length adjustment means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire pulling bogie that is pulled by a wire and moves up and down on an inclined track.
In particular, the present invention relates to a wire pulling bogie that is pulled by a plurality of parallel wires and has improved safety against wire cutting.

[0002]

2. Description of the Related Art Maintenance and inspection methods in a conveyor gallery include stairs along a conveyor and walking on foot.
In order to save labor and increase efficiency, there is a method in which rails are installed in parallel with the conveyor, and the method is performed using a wire pulling type cart. In a wire-towed trolley that is pulled by a wire and moves up and down an inclined track, as used in the latter method, it is usually necessary from a safety point of view that emergency trolleys do not run away even if the wire is cut. Equipment. As such a safety device, an emergency braking device that locks a bogie to a rail by detecting a wire cut is generally used.

[0003]

However, in the case of such a wire-drawn trolley equipped with only a safety device, in the event of a double failure in which the emergency braking device does not operate, the trolley cannot escape. There is. In addition, there is also a problem that it is generally difficult to detect deterioration of a wire that may lead to cutting.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. In normal use, a plurality of wires are used in parallel to perform traction with a margin, and the load of the plurality of wires is reduced. Can be balanced, even if 1
Even if this wire is cut, we provide a wire tow truck with improved safety that can prevent the bogie from escaping without relying on the emergency braking device and detect wire deterioration due to wire elongation. The purpose is to do.

[0005]

In order to solve the above-mentioned problems, the present invention according to claim 1 is characterized in that a bogie frame is pulled by a plurality of wires extending in parallel along an inclined track so that the vehicle can move on the inclined track. In the wire pulling trolley that moves up and down,
An equalizer beam having one end of the wire connected to each end, a support portion for rotatably supporting a central portion of the equalizer beam on the bogie frame, and a stopper for regulating a rotation angle of the equalizer beam. It is characterized by having done.

According to this configuration, since a plurality of wires are arranged in parallel, even if one wire is cut,
The bogie is held by the remaining wires, and in normal use, the load applied to the wires on both sides of the equalizer beam is automatically balanced by the rotation of the equalizer beam.

According to a second aspect of the present invention, there is provided the wire pulling type trolley according to the first aspect, further comprising means for detecting a rotation angle of the equalizer beam.

[0008] According to this configuration, when there is a difference between the lengths of the two wires due to deterioration of the wires or the like, the rotation angle of the equalizer beam increases. Can be detected.

According to a third aspect of the present invention, in the wire pulling bogie according to the first or second aspect, the wire connected to at least one of both ends of the equalizer beam has a wire length adjusting means. It is characterized by being.

[0010] According to this configuration, it is possible to visually check or claim 2.
If the inclination of the equalizer beam, that is, the deviation of the lengths of the two wires is detected by the equalizer beam rotation angle detecting means described in (1), the wire length adjusting means can adjust the wire equalization. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view showing an embodiment of a wire-pullable trolley according to the present invention, and FIG. 2 is a plan view as viewed from an arrow A in FIG.

The wire pulling type trolley 1 is an example of a trolley used for maintenance / inspection in a conveyor gallery.
It is supported by. The bogie frame 2 includes a plurality of wheels 9, which roll on rails 11 forming an inclined track, so that the wire-traction type bogie 1 can move along the slope. Further, the bogie frame 2 is provided with an emergency braking device 10 for locking and holding the wire pulling bogie 1 on the rail 11 in the event of an emergency such as wire cutting.

The wire pulling type truck 1 of the present embodiment comprises a bogie frame 2 attached to two wires 7 extending along an inclined track.
Is lifted and lowered on the rail 11. One end of the wire 7 is connected to both ends of the equalizer beam 3 via a shackle 16, a turnbuckle 14, and a shackle 15 that constitute wire length adjusting means. The other end of the wire 7 is changed in direction by a rope sheave 8 supported by the bogie frame 2, and is connected to a wire winding device 13 through another rope sheave 12 installed outside.
It is connected to the. The wire winding device 13 includes a drum around which the wire 7 is wound, and a driving unit (not shown) for rotating the drum. In addition, it is also possible to incorporate a load cell into the rope sheave 12 to monitor the weight of the wire pulling type trolley 1, and to combine this with an alarm device to configure an overload alarm device.

A center portion of the equalizer beam 3 is supported by a support portion 4 fixed to the bogie frame 2 so as to be rotatable around a rotation axis O, and is prevented from coming off by a nut 5. In order to smoothly perform this rotation, it is desirable to interpose, for example, a dry bearing or a rotary bearing between the support portion 4 and the equalizer beam 3. The equalizer beam 3 is rotatably supported in this way, but when the rotation angle reaches a predetermined angle, the equalizer beam 3 hits the stopper 6 fixed to the bogie frame 2 and further rotation is restricted. . Stopper 6
Are provided on both sides of the rotation axis O, so that the angle is regulated regardless of whether the equalizer beam 3 rotates clockwise or counterclockwise.

Further, the equalizer beam 3 and the bogie frame 2 are provided with rotation angle detecting means 17 for detecting the relative displacement between them and detecting the rotation angle of the equalizer beam 3. The rotation angle detecting means 17
For example, it is configured by a non-contact differential transformer type displacement meter or the like. Here, the displacement meter is used to detect the displacement due to the rotation of the equalizer beam 3, but
In the vicinity of the rotation axis O, the rotation angle itself may be detected by, for example, a rotary encoder or the like.

Next, the operation of the wire pulling type trolley 1 having the above-described configuration during normal use, when the wire is deteriorated, and when the wire is cut will be described.

First, at the time of normal use, the wire pulling type trolley 1
Is connected to a wire winding device 13 by two wires 7, and by operating the wire winding device 13 in a winding direction or a rewinding direction, the inclined rail 1 is moved.
1 to ascend or descend to perform maintenance and inspection inside the conveyor gallery. Since the two wires 7 are connected to the rotatable equalizer beam 3,
When there is a difference between the loads applied to the wires, the equalizer beam 3 automatically turns to balance the applied loads. In this way, the straight running property of the wire pulling type trolley 1 is kept good.

When the wire deteriorates during use, the length of the wire generally increases. In the wire pulling bogie 1 according to the present embodiment, when an abnormal extension occurs on one of the two wires 7, the equalizer beam 3 stops the portion where the extended wire 7 is connected to the stopper. 6 in the direction approaching. At this time, since the wire pulling type trolley 1 is provided with the rotation angle detecting means 17, this rotation can be detected without depending on the visual observation, and the timing at which the wire exchange is necessary can be known. Here, if a reference value of the rotation angle at which the wire replacement is to be performed is determined in advance and a warning device or the like is provided, a wire replacement warning can be automatically issued.

The wire pulling bogie 1 according to the present invention is equipped with two wires 7 in parallel and has a margin as a load on the wires. Although the wire can be maintained, there is no possibility that the wire is cut for some reason. Assuming such a situation, there are two wires 7
Of these, it is assumed here that the right wire 7 shown in FIG. 2 has been cut. In this case, the equalizer beam 3 is shown in FIG.
At the right side, and hits the right stopper 6 as shown by the two-dot chain line, and stops in this state. At this time, the connection state of the left wire 7 is maintained, and the one wire can hold the wire pulling type trolley 1. That is, runaway can be avoided without operating the emergency braking device 10. The emergency braking device 10 may be operated only when the remaining one wire 7 is cut by any chance. In this way, the wire pulling type trolley 1 of the present embodiment forms a redundant system with extremely high safety from the viewpoint of avoiding runaway.

Even when the cutting wire is on the left side, the above operation is exactly the same except that the rotation direction of the equalizer beam 3 is reversed.

Further, the wire pulling type trolley 1 according to the present embodiment.
Here, the wire 7 is connected to the equalizer beam 3 via a shackle 16, a turnbuckle 14, and a shackle 15 as wire length adjusting means. Wire 7
In the case where a small elongation that does not require replacement is generated, the length of the wire 7 can be adjusted by appropriately rotating the right or left turnbuckle 14. In this way, the load on the two wires 7 can be balanced with the equalizer beam 3, so that the life of the wires 7 can be extended, and the linearity of the wire pulling trolley 1 at the time of elevating and lowering can be kept good. Can be.

[0022]

As described above, according to the first aspect of the present invention, even if one wire is cut, the bogie is held by the remaining wires. Performance can be improved.

According to the second aspect of the present invention, when a difference in wire length occurs due to deterioration of the wire, this can be detected, so that the wire can be replaced with a new one before the wire is cut. Can be further improved.

According to the third aspect of the present invention, when there is a difference between the wire lengths and it is determined that replacement with a new one is unnecessary, the wire length is adjusted by equalizing the wire length. Load can be balanced, the life of the wire can be extended, and the straightness of the wire pulling trolley can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing the entirety of a wire pulling bogie according to the present invention.

FIG. 2 is a plan view showing details around an equalizer beam as viewed from an arrow A in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire pulling trolley 2 Bogie frame 3 Equalizer beam 4 Support part 6 Stopper 7 Wire 13 Wire winding device 14 Turnbuckle 17 Rotation angle detection means O Rotation axis

Claims (3)

[Claims] 1. An equalizer having one end connected to each end of a wire pulling bogie that pulls a bogie frame by a plurality of wires extending in parallel along an inclined track and moves up and down on the inclined track. A wire pulling type trolley comprising: a beam; a support portion rotatably supporting a center portion of the equalizer beam on the bogie frame; and a stopper for restricting a rotation angle of the equalizer beam. 2. The trolley according to claim 1, further comprising means for detecting a rotation angle of the equalizer beam. 3. The wire connected to at least one of both ends of the equalizer beam includes a wire length adjusting means.
The wire pulling trolley of the description.