JPH083130Y2 - Load detection device for overhead line support device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an overhead wire supporting device for performing horizontal overhead wire work, and in particular, the horizontal overhead wire work is safe by detecting the horizontal load applied to the horizontal arm. In addition, the present invention relates to a horizontal load detection device for an overhead wire support device for performing efficiently.

[Prior art]

Conventional overhead line work, especially rebuilding of utility poles where overhead lines are mounted on horizontal arms in a live state, re-installation of overhead lines, replacement of transformers mounted on utility poles, switches and insulators. For example, the work is done by removing the electric wire and arm from the utility pole to be rebuilt, and temporarily placing the existing overhead wire or arm on the four-sided roller attached to the temporary horizontal arm mounted on the tip of the boom or the arm grip grasper. The reality is that new poles are being rebuilt, new overhead wires or parts such as arms and insulators are being replaced, and new transformers and switches are being replaced.

[Problems to be solved by the device]

By the way, since the overhead wire support device equipped at the tip of the boom adopted by the above-mentioned conventional overhead wire support device, that is, the horizontal arm for temporary placement is simply fixed by crossing the temporary support arm. When the overhead wire is temporarily placed on the corresponding four-sided roller, for example, when the overhead wire temporarily placed on the horizontal arm continues various work, it eliminates the risk of electric shock and prevents the work from occurring. After moving horizontally to one of them, a predetermined overhead line work is performed, but as the conventional overhead line support device does not take any means for detecting horizontal load on the temporary horizontal arm, as described above. It was not possible to know the horizontal load applied to the horizontal arm from the overhead line that moved horizontally. Therefore, if an excessive horizontal load is applied to the horizontal arm, there is a risk that an unexpected twisting moment will act on the boom, leading to a fall accident of the work vehicle, and such work must be performed carefully. However, there were various problems such as extremely poor work efficiency.

[Means for Solving the Purpose and Problem of Invention]

The present invention has been made in view of the above problems, and its object is to detect an overhead wire supporting device for performing horizontal overhead wire work, and particularly to detect a horizontal load applied to a horizontal arm. Is to provide a horizontal load detecting device for an overhead wire supporting device for safely and efficiently performing horizontal overhead wire work, and for that purpose, the boom is mounted on a work vehicle so as to be slidable in the axial direction. A horizontal arm, a slider attached to the horizontal arm so as to move as the horizontal arm slides, a spring that holds the horizontal arm in a neutral position by a biasing force, and a switch that operates by the movement of the slider. To do.

[Action]

Since the present invention adopts the above-mentioned configuration, when a dangerous level horizontal load (this dangerous load is set to the urging force of the spring) is applied to the horizontal arm, the spring is attached to the horizontal arm. The switch is operated by moving the slider beyond the influence. in this way,
The risk of electric shock due to the overhead wire temporarily placed can be eliminated, and the horizontal load applied from the overhead wire that moves horizontally to the left or right so as not to hinder the work can be accurately detected, so carelessly There is no excessive horizontal load on the boom.Therefore, there is no risk of accidental overturning of the work vehicle due to unpredictable twisting moment on the boom, which is unnecessary for confirming horizontal load. Since it is possible to concentrate on overhead line work without the need to use special nerves, work efficiency is significantly improved, and work can be performed efficiently and extremely quickly.

〔Example〕

An embodiment of a load detecting device for an overhead wire supporting device according to the present invention will be described in detail with reference to FIGS. 1, 2 and 3.

In the figure, reference numeral 1 is a work vehicle (this embodiment will be described by using a digging column), and 2 is a subframe 1a of the work vehicle 1.
It is a turntable mounted near the front. Reference numeral 3 is a boom mounted on the turntable 2 so as to be capable of undulating and expanding and contracting. A bracket 4 is pivotally attached to the tip of the boom 3, and a swinging body 5 is swingably mounted on the bracket 4 in a vertical plane. One end 6a is pivotally supported between the bracket 4 and the rocking body 5 at a substantially central portion of the bracket 4, and the other end 6b is pivotally supported by the rocking body 5 to rock the rocking body 5 on a vertical inner surface. A cylinder 6 for moving is arranged.

Further, a swivel device 8 driven in a horizontal plane by a gear 8a meshed with a gear swiveled by a hydraulic motor 7 is attached to the rocking body 5, and a temporary support arm 9 is vertically attached to the swivel device 8. A horizontal arm 10 is attached to the temporary support arm 9.

By the way, a loose hole 10a is bored in the horizontal arm 10, and the temporary support arm 9 is formed in the loose hole 10a.
The pin 9a protruding from the side of the
The reference numeral 10 is configured to be slidable right and left within the range of the loose hole 10a as shown by an arrow. Reference numeral 11 denotes a support bracket that stably holds the horizontal arm 10 fixed to a side portion of the temporary support arm 9, and a load detector 12 is built in the support bracket 11. The load detector 12
Is a slider 12a that is integrally attached to the side portion of the horizontal arm 10 and that moves left and right by a constant width 1 as the horizontal arm 10 slides left and right, and an abutment 12a 'provided at one end of the slider 12a. It is composed of a limit switch 12b which is turned on and off by coming into contact with the alarm switch 12c which emits an alarm sound when the limit switch 12b is turned on.

In addition, 12d is a spring inserted in the slider 12a.

Reference numeral 13 is a four-sided roller that supports the overhead wire W mounted on the horizontal arm 10.

Hereinafter, the operation of the load detecting device for the overhead wire supporting device according to the present invention will be described based on the above configuration.

That is, the load detecting device for an overhead wire supporting device according to the present invention comprises a temporary support arm 9 that constitutes an overhead wire supporting device pivotally attached to the tip of a boom 3 mounted on the work vehicle 1, and a crossing to the temporary supporting arm 9. Load detector 1 between horizontal arms 10
2. That is, the horizontal arm 10 is integrally attached to the side portion of the horizontal arm 10 and has a constant width l as the horizontal arm 10 slides left and right.
ON / OFF by contacting the slider 12a that moves left and right only with the contactor 12a 'provided at one end of the slider 12a
ON the limit switch 12b and the limit switch 12b
In order to detect the load in the horizontal direction applied by the overhead wire W temporarily mounted on the four-sided rollers 13 standing on the horizontal arm 10, the load detector 12 constituted by the alarm device 12c that emits an alarm sound in the state is attached. Since it is configured, even if a situation in which an excessive horizontal load is inadvertently applied to the horizontal arm 10, the load detector 12 accurately detects the excessive load and outputs an alarm.
The horizontal arm 1
There is no unexpected twisting moment applied to the boom 3 via 0, so there is no danger of electric shock by contacting the overhead wire W that is temporarily placed, and the work moment 1 may fall due to the twisting moment. There is no danger, and there is no need to use unnecessary nerves to check the horizontal load, so it is possible to concentrate on overhead line work.

[Effect of device]

As described in detail above, the present invention provides a horizontal arm slidably attached to the tip of a boom mounted on a work vehicle, and a slider attached to the horizontal arm so as to move as the horizontal arm slides. And a spring for holding the horizontal arm in a neutral position by an urging force, and a switch operated by the movement of the slider, so that a horizontal load of a dangerous level to the horizontal arm (this dangerous load is If the force of the spring is set), the slider is moved over the force of the spring to activate the switch. In this way, it is possible to eliminate the danger of electric shock due to the overhead wire temporarily placed, and to accurately detect the horizontal load applied from the overhead wire that is horizontally moved to the left or right so as not to hinder the work. The excessive horizontal load is not inadvertently applied to the boom.Therefore, there is no risk that the boom will be subjected to an unexpected twisting moment as in the past, causing the work vehicle to tip over. Since there is no need to use unnecessary nerves for confirmation, it is possible to concentrate on overhead line work, so work efficiency is significantly improved, and various excellent effects such as work can be carried out efficiently and extremely quickly. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a work vehicle equipped with a load detecting device for an overhead wire supporting device according to the present invention, and FIG. 2 is an enlarged view of a load detecting device for an overhead wire supporting device according to the present invention, Third
FIG. 1 is an enlarged perspective view of a main part of a load detecting device for an overhead wire supporting device according to the present invention. 1 ... work vehicle, 2 ... turntable, 3 ... boom,
4 ... Bracket, 4a ... One end, 4b ... Other end, 5 ... Oscillator, 6 ... Cylinder, 8 ... Revolving device, 9 ... Temporary support arm, 10 ... Horizontal arm, 10a ... Loose Hall, 11
…… Support bracket, 12 …… Load detector, 12a …… Slider, 12b …… Limit switch, 12c …… Alarm, 13
...... Four-sided roller, W ... Overhead line.

Claims (1)

[Scope of utility model registration request] 1. A horizontal arm mounted on the tip of a boom mounted on a work vehicle so as to be slidable in the axial direction, a slider attached to the horizontal arm so as to move as the horizontal arm slides, and the horizontal arm. A load detecting device for an overhead wire supporting device, comprising: a spring that holds the element at a neutral position by an urging force; and a switch that is activated by movement of the slider.