JPH0740700U - Safety equipment for orbital work vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure the stability of the vehicle body of a track work vehicle without visually confirming that the iron wheel is leaving the track. In this safety device, when the jack 9 is used to support the vehicle body 2a and the contact of the track traveling wheel 4 with the track R is detected by the wheel contact detection means, the alarm means is provided. The alarm buzzer or the alarm lamp is operated to give an alarm, or the operation of the work device 10 is restricted to give an alarm. Thereafter, the jack 9 is used to further lift the vehicle body 2a to move the orbital wheels 4 to the orbit R.
If the vehicle body 2a is separated from the alarm device, the alarm operation is released, and the working device 10 can be operated while ensuring the stability of the vehicle body 2a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device for a track work vehicle that travels on a track to perform work.

[0002]

[Prior art]

 The track work vehicle is equipped with work devices used for maintenance and inspection work of the trolley wire on the vehicle body, and track running wheels for traveling on the track are attached to the front, rear, left and right of the vehicle body. There is. Further, jacks for supporting the vehicle body on the ground are attached to the front, rear, left and right of the vehicle body of the work vehicle in order to ensure the stability of the vehicle body when operating the work devices and the like. When the vehicle body is supported by this jack, it is desirable to lift the vehicle body by jacking so that the track running wheels are slightly separated from the track in order to enhance the stability of the vehicle body.

[0003]

[Problems to be solved by the device]

 However, maintenance and inspection work for the trolley wire is often performed at night so that train operation will not be hindered. In this case, there is a problem that it is dark and difficult to visually determine whether or not the track-traveling wheels are reliably separated from the track when the jack is used.

The present invention has been made in view of the above problems, and a work vehicle for a track capable of ensuring the stability of the vehicle body without visually confirming whether the track traveling wheel is separated from the track. The purpose is to provide a safety device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the safety device of the present invention is a wheel contact detection means for detecting whether or not a track running wheel is in contact with a track, and a jack is used for supporting a vehicle body. In addition, the wheel contact detection means performs an alarm operation when the fact that the wheel is in contact with the track is detected.

[0006]

[Action]

 In such a safety device, when the wheel contact detection means detects contact of the track traveling wheel with the track while the jack is operating, the alarm means activates a warning buzzer or a warning lamp. To warn the operator and regulate the boom operation to give an alarm. As a result, the worker can determine that they are still in contact with the track without looking around the wheels in the dark, and can avoid work in the unstable support state of the vehicle body. After that, if the vehicle body is further lifted by the jack to disengage each wheel from the track, the alarm operation is canceled as if the vehicle body is stably supported, and the work device can perform the work.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows a dual-rail aerial work vehicle equipped with a safety device according to the present invention. The aerial work vehicle 1 is configured with a truck 2 as a base, and is used for road traveling wheels attached to the lower side of the vehicle body 2a (front and rear steering wheels 3a and rear portions). It is possible to drive on the road by means of the driven wheels 3b). Iron orbits 4 for track running are attached to the lower, front, rear, left and right sides of the vehicle body 2a adjacent to the wheels 3a, 3b.

As shown in detail in FIG. 2, the iron wheel 4 is rotatably mounted on a rocking plate 6 which is vertically pivotally mounted on a lower portion of a supporting member 5 mounted on a side surface of a vehicle body 2a. It is supported. A hydraulic overhanging cylinder 7 is attached between the upper portion of the support member 5 and the upper portion of the oscillating plate 6 by a cylinder attachment pin 7a. A predetermined backlash G is provided between the pin 7a and the pin holding hole 5a formed in the upper portion of the support member 5 for receiving and holding the pin 7a. As shown in FIG. 1, the wheel 4 attached in this manner may be extended below the vehicle body 2a together with the oscillating plate 6 or may be stored near the side surface of the vehicle body 2a by the expansion and contraction operation of the extension cylinder 7.

A center jack 8 is attached to the center of the lower portion of the vehicle body 2a. The center jack 8 can be extended below the vehicle body 2a to ground the lower end portion, and further extended to raise the vehicle body 2a from the ground. The center jack 8 and the vehicle body 2a can freely rotate horizontally, and the vehicle body 2a can change its direction with respect to the ground when the center jack 8 lifts the vehicle.

Further, side jacks 9 are attached to the front, rear, left and right of the vehicle body 2a. The side jack 9 supports the vehicle body 2a with respect to the ground by projecting laterally to the vehicle body 2a and extending downward (jacking) to ground the lower end portion.

On the other hand, an aerial work apparatus 10 is attached to the upper part of the vehicle body 2a. This aerial work apparatus 10 is composed of a swivel base 11 mounted on the front of the vehicle body 2a so as to be horizontally swivelable with respect to the vehicle body 2a, and a boom 12 mounted on the swivel base 11. ing. The boom 12 includes a base end boom 12a that is attached to the swivel base 11 so as to be up and down, an intermediate boom 12b that is inserted into the base end boom 12a so as to extend and contract in the longitudinal direction, and a middle end boom 12b that extends in the longitudinal direction. It is composed of a tip boom 12c that is telescopically inserted. A workbench 13 is attached to the tip of the tip boom 12c. The workbench 13 is held horizontally by a leveling device (not shown) regardless of the boom 12 in an up-and-down state.

The aerial work vehicle 1 configured as described above performs maintenance / inspection work (hereinafter, referred to as aerial work) of a trolley wire (not shown) stretched above the rail R. Drive on normal roads until near the site. At this time, each iron wheel 4 is stored in the vehicle body 2a. The aerial work vehicle 1 will stop so as to cross the rail R on a railroad crossing near the site. Then, the center jack 8 is extended and the vehicle body 2a is lifted, and the vehicle body 2a is horizontally turned so as to be parallel to the rail R. At this time, each wheel 4 is projected downward. Next, the center jack 8 is contracted to lower the vehicle body 2a, and the iron wheels 4 are placed on the rails R. When each iron wheel 4 rides on the rail R, the driving wheel 3b also contacts the rail R. Therefore, if the driving wheels 3b are rotated, the high-altitude work vehicle 1 can travel on the rail R and move to the work site. When the aerial work vehicle 1 arrives at the work site, each side jack 9 is extended to support the vehicle body 2a.

Further, the aerial work vehicle 1 is equipped with a safety device according to the present invention in order to secure the stable support of the vehicle body 2a by the side jacks 9 as described above. As shown in FIG. 3, the safety device 30 includes a support operation detector 31, a track contact detector 32, a controller 33, and a buzzer 34.

The support operation detector 31 is attached to an operation switch (not shown) for instructing the side jack 9 to perform a jack operation, and whether or not the side jack 9 is in operation, that is, The purpose of this is to detect whether or not it is used to support the vehicle body 2a. The support operation detector 31 outputs a detection signal (electrical signal) while the operation switch is turned on (the side jack 9 continues to operate during this time).

As shown in detail in FIG. 2, the track contact detector 32 is composed of a limit switch mounted on the upper part of the support member 5, and the iron wheel 4 projecting downward is in contact with the rail R (contact track). It is for detecting whether or not). The track contact detector 32 has a switch rod 32a that can project and retract upward. A switching plate 36 is attached to the upper end of the overhanging cylinder 7 so as to extend above the contact detection device 32. When the overhanging cylinder 7 is in the upward movement state within the range of the play G formed between the cylinder mounting pin 7a and the pin holding hole 5a described above, this switching plate 36 is shown in the drawing. As shown by the chain line, the contact detector 32 is disengaged from the switch rod 32a. On the other hand, when the overhanging cylinder 7 is in the downward movement state within the range of the play G, the switch rod 32a is pushed downward. The track contact detector 32 outputs a detection signal (electrical signal) when the switch rod 32a projects upward, and stops the output of the detection signal when the switch rod 32a is pushed in.

The detection signals output from the support detector 31 and the track contact detector 32 are input to the controller 33. The controller 33 outputs an alarm signal (electrical signal) when the detection signals from both detectors 31 and 32 are input. Further, the buzzer 34 generates an alarm sound when receiving the alarm signal from the controller 33.

Next, the operation of the safety device 30 thus configured will be described. After each iron wheel 4 is placed on the rail R by the operation of the center jack 8, when the side jack 9 starts the downward extension operation, a detection signal is output from the support operation detector 31 and is input to the controller 33. When each iron wheel 4 is still in contact with the rail R, that is, when the side jack 9 extends to some extent and the lower end contacts the ground, that is, when the extension amount of the side jack 9 is insufficient, As shown by the chain line, the overhanging cylinder 7, the oscillating plate 6 and the iron ring 4 are in the upward moving state within the range of the play G, and the switching plate 36 is disengaged from the switch rod 32a of the gauge detector 32. is doing. Therefore, a detection signal is output from the track contact detector 32 and input to the controller 33. The controller 33 sends an alarm signal to the buzzer 34, and causes the buzzer 34 to generate an alarm sound. An operator (not shown) who hears this alarm sound can recognize that it is necessary to further extend the side jack 9 without looking at each iron wheel 4 one by one, and the vehicle body can be recognized even in a dark night. It is possible to reliably avoid work in high places where 2a is unstable.

When the side jack 9 is further extended and the vehicle body 2a is lifted so that each iron wheel 4 is disengaged from the rail R, and stable support of the vehicle body 2a is completed, as shown by the solid line in FIG. The overhanging cylinder 7, the oscillating plate 6 and the iron wheel 4 are in the lower state within the range of the play G, and the switching plate 36 pushes the switch rod 32a. Therefore, the detection signal from the contact detector 32 is not input to the controller 33, and the controller 33 stops outputting the alarm signal. Therefore, the operator can determine that the vehicle body 2a is stably supported, and can ride on the workbench 13 to freely perform work in high places.

Although the buzzer is illustrated as the alarm means in the above embodiment, the safety device according to the present invention is not limited to this, and a restrictor for restricting the operation of the lamp (not shown) or the boom 12 as the alarm means. 35 (see FIG. 2) may be used.

[0020]

[Effect of device]

 As described above, if the safety device of the present invention is used, even if the jack is operated to support the vehicle body, a predetermined alarm is activated as long as the track running wheels are in contact with the track. For this reason, it is possible to reliably prevent work in the unstable support state of the vehicle and to ensure work safety on the track without visually inspecting whether or not the wheel has separated from the track.

[Brief description of drawings]

FIG. 1 is a side view of a road-rail amphibious work vehicle equipped with a safety device according to the present invention.

FIG. 2 is an enlarged view of an area around an iron wheel of the aerial work vehicle.

FIG. 3 is a block diagram of the safety device.

[Explanation of symbols]

 1 Rail-road amphibious aerial work vehicle 4 Rail running iron wheel 5 Supporting member 6 Swing plate 7 Overhanging cylinder 10 Aerial work equipment 30 Safety equipment 34 Buzzer G Gata

Claims (1)

[Scope of utility model registration request] 1. A safety device for an orbital work vehicle, comprising: track running wheels for running a track on front, rear, left and right sides of a vehicle body; and jacks for supporting the vehicle body. Wheel contact detection means for detecting whether or not the traveling wheel is in contact with the track, and when the jack is used for supporting the vehicle body, the track contact wheel is detected by the wheel contact detection means. A safety device for a track work vehicle, comprising: an alarm unit that performs an alarm operation when it is detected that the track vehicle is in contact with the track.