JPH0451461Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a safety fence for a mobile transformer used when performing work without power outage during construction such as replacing an existing transformer or relocating a utility pole.

[Conventional technology]

In recent years, due to the spread of advanced industrial equipment such as computers and the sophistication of lifestyles due to the introduction of a wide variety of high-performance home appliances, today's social life has become increasingly dependent on electricity, resulting in construction power outages and breakdowns. Social awareness of power outages, regardless of whether they are power outages, is becoming increasingly severe. For this reason, today, in response to the above social needs, for example, in the event of a construction power outage, bypass cable cars loaded with power cables and mobile transformer cars are used to provide relief to customers. A so-called uninterruptible construction method has been developed that allows the supply of electricity to continue during a power outage, and has come to be used for construction power outages. and,
The mobile transformer used in the above-mentioned uninterruptible construction method is generally housed in an outer box that is loaded and fixed on a vehicle, and the main body of the transformer is housed together with the primary and secondary switches, voltage detection/phase detection equipment, etc. Outside the box, it is constructed by mounting high and low voltage cables, bypass cables, etc. on the vehicle, and when using it, connect the bypass cable vehicle and the mobile transformer vehicle at the construction site, and connect the power cable to the outside of the construction area. A bypass is applied from the mobile transformer to each customer on the high-voltage and low-voltage sides via cables to continue uninterrupted supply, and the line switch is opened to make the construction section voltage-free and construction work can be carried out safely. was going there.

[The problem that the idea aims to solve]

The mobile transformer described above is used to carry out uninterrupted construction while sequentially moving from one predetermined construction site to another during power outages.
Although it is mounted on a vehicle and has maneuverability, the height from the road surface to the roof of the outer box is quite high (approximately 2 meters or more).

Therefore, at the construction site, there is a need to monitor and give instructions on the progress of the construction work, or to connect the low-voltage cable connected to the mobile transformer to the pole-mounted transformer, and then perform work such as moving, storing, and connecting the low-voltage cable connected to the mobile transformer. It was necessary for a person to climb onto the roof of the outer box. However, since no conventional safety measures have been taken on the roof of the outer box, there is always a risk of falling during work, etc., and careful work is required to avoid danger. The location made it difficult to carry out work quickly and safely.

In addition, the cables used for construction were bundled carelessly and loaded onto the outer box at the end of the work, tied up with ropes and supported by the outer box. If the cable became loose, there was a risk of the cable slipping off the vehicle.

[Means for solving the problem and their effects]

In view of the above-mentioned problems, the present invention installs foldable safety shelves around the roof of the outer box that houses the mobile transformer and is mounted on the vehicle. When climbing up to work, the safety racks are pulled up and placed around the roof, and when finished, they are stacked and folded individually to create a holding effect that serves to press and hold the loaded cables. The safety shelf has a plurality of pillars made of round rods cut into relatively short dimensions planted around the upper surface of the outer box, and these pillars have round rods cut into relatively short dimensions. The legs of the safety frame body, which is bent into a substantially rectangular frame shape, are foldably connected by pivot pins, and the safety frame body is pulled up and attached to the support column, and the support tube is loosely fitted to the support column so as to be movable up and down. By holding the outer box upright, a safety shelf is formed around the top surface of the outer box, ensuring safety when workers work on the mobile transformer, and when work is finished, the safety frame can be placed in the shape of a box frame. The present invention is characterized in that the cable is folded and loaded on the outer box and serves as a cable holder to prevent the cable from slipping off due to vibrations or the like during movement of the vehicle.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 9 of the accompanying drawings.

In FIG. 1, 1 is a vehicle, and on the chassis 2 there are a bypass cable winding drum 4 equipped with a cable delivery arm 3, a high-voltage switch 5 with voltage detection and phase detection functions, and an outer box. A mobile transformer 7 in which the main body of the transformer is housed together with various switches is mounted inside 6, and 8 is a mobile transformer 7 loaded on the upper surface F of the outer box 6.
As shown in FIG. 2, the low voltage cable 9 connected to the low voltage side of the vehicle is a safety fence installed on the upper surface (roof portion) F of the outer box 6 of the mobile transformer 7 mounted on the chassis 2. As shown in FIGS. 3 to 6, this safety fence 9 has a safety frame a attached to the upper surface F of the outer box 6.
.about.d are arranged in an independent and foldable manner. As shown in FIG. 2, each of the safety frames a to d is provided by bending a round bar or pipe into a substantially rectangular shape, and to attach these safety frames a to d to the outer box 6, , a rod-shaped leg e is attached near the lower end of each of the frames a to d, and a flange f is integrally attached near the base of each leg e by welding, as shown in FIG. As shown in FIG. 9, a locking pin 10 is fixed to the slightly lower side of the flange f so that its body is partially exposed to the outside. Further, the upper surface F of the outer box 6 is partially stepped due to the contents contained therein, and a locking shelf 11 is provided at the periphery of the low apex (left side in FIG. 1) g at the same height as the high apex h. Rod-shaped supports i are welded on the periphery of the locking shelf 11 and the high top h at positions corresponding to the legs e provided on each of the safety frames a to d. Therefore, it is installed vertically. As shown in FIG. 8, a stopper seat 12 is provided around the base of each of these supports i, and a stopper seat 12 is provided at the upper end facing the leg e.
The protruding part j is located at the lower end of the leg part e.
When the protrusions j are fitted into the grooves k and both are pivotally connected by the pivot pin 1, the safety frames a to d are connected via the legs e. It can be pivotally connected to the pillar i so that it can be raised and lowered. 1
Reference numeral 3 denotes a support tube loosely fitted from the support i to the leg e so as to be able to slide up and down, and as shown in FIGS. 8 and 9, the upper edge has a hook hole along its axial direction. 14
is drilled, and the locking pin 10 is inserted using the hook hole 14.
When the support tube 13 is hooked to the
As shown in the figure, as shown in FIG.
It is designed so that it can be bent approximately 90 degrees from the support i around the pivot pin 1. Also, release the locking pin 10 and remove the stopper seat 1 of the column i.
2, as shown in FIG. The length is such that it can be held upright to prevent it from falling over. In FIG. 2, n is an auxiliary frame attached to the lower side of each safety frame a to c, 15 is a chain that closes the corner between each safety frame a to d, and 16 is an outer box 6. This is a ladder attached to the front wall of the building.

Next, the operation will be explained.

The mobile transformer 7 mounted on the vehicle 1 and a bypass cable car (not shown) are placed at the load center point within the construction zone. In this state, the ladder 16 of the mobile transformer 7
Climb onto the top surface F of the outer box 6 using the As shown in FIG.
Therefore, when the leg e is pulled up vertically from the state shown in FIG. 7 as shown in FIG. 8, the support tube 13 also rises while being locked by the locking pin 10. In this state, as shown in FIG. 8, the support tube 13 is pushed up a little in its axial direction, rotated clockwise, and the body of the locking pin 10 and the entrance edge of the hook hole 14 are aligned, and the support tube 13 is When the support tube 13 is released from the locking pin 10, the support tube 13 is released from the locking pin 10 and falls, and is held by the stopper seat 12 of the support column i as shown in FIG. As a result, the connecting portion between the leg e and the support column i is covered by the support tube 13, and the connecting portion of the leg e is accommodated in the support tube 13, so the leg e remains vertical without being tilted. The raised safety frame d can be held vertically on the support column i via the support cylinder 13. In this way, the remaining safety frames c, b, and a are also raised in sequence,
Remove the support tube 13 from the locking pin 10, lower the support tube 13 so that it covers the joint between the leg part e and the support column i, and hold each safety frame c, b, and a upright so that they do not fall. By doing so, a safety fence 9 is formed on the upper surface of the outer box 6. Each safety frame a
After raising ~d, the worker climbs onto the upper surface F of the outer box 6, and closes the gap by passing the chain 15 between the guide frames a~d. In this state, a bypass cable connected to the high voltage side of the mobile transformer 7 is fed out from the winding drum 4 loaded on the vehicle 1 by the delivery arm 3, and this cable is connected to a healthy section outside the construction zone. The bypass cable (not shown) is connected to the bypass cable of the vehicle, and then the low-voltage cable 8 loaded on the upper surface F of the outer box 6 of the mobile transformer 7 is fed out by a feeding device (not shown) attached to the vehicle 1, and is fed into a predetermined position. The line will be connected to the low voltage side of the pole transformer to continue supplying customers without power outage, while the line switch in the construction zone will be opened to ensure that there is no voltage in the construction zone. In this way, when delivering the bypass cable or low-voltage cable 8 from the vehicle 1, or when checking the progress of construction, the worker climbs onto the outer box 6 of the mobile transformer 7 and gives work and instructions. If so, outer box 6
A safety fence 9 is installed around the upper surface F at a height that almost matches the waist height of the worker, so that the worker can work safely without worrying about falling down.

Subsequently, the necessary construction work is completed in the construction section, and the bypass cable is wound onto the winding drum 4.
The low-voltage cable 8 is wound into a ring and bundled, and is loaded from the low top g to the high top h of the outer box 6. By folding the safety fence 9 in this state,
Preparation for moving the mobile transformer 7 is completed. Then, when folding the safety fence 9, it is done in the reverse order from when it was raised.

That is, first, as shown in FIG.
Fold more. In this case, as shown in FIG. 9, the support tube 13 is fitted loosely into the support column i so that the leg e cannot be bent, so when folding the support tube 13 is attached to the leg e. 8th
As shown in the figure, the hook hole 14 is engaged with the body of the locking pin 10 to lock the support tube 13 to the locking pin 10, and the connecting portion between the leg e and the support i is released to form the safety frame a. The fourth
As shown in the figure, lay it down on the low voltage cable 8 located on the low top g side of the outer box 6. Subsequently, in the same manner as described above, the remaining safety frames b and c are also brought down to the cable 8 side and a portion thereof is superimposed on the safety frame a (see FIG. 5). Then, as shown in Fig. 6, the last safety frame d is opened by the support tube 13 to open the connecting part between the leg part e and the support column i, and is folded down to the first folded safety frame a side. Fold it onto the second folded safety frame b.

In this way, the safety frames a to d are sequentially attached to the support tube 13.
By opening the connecting part between the leg part e and the support column i covered by the bracket and by engaging the support tube 13 with the locking pin 10, folding can be done easily and safely. In addition, when folding the safety frames a to d, at that time the chain 15 that is stretched between the frames
Remove the .

When the safety fence 9 is folded as described above, the first
As shown in FIG. 6, the safety fence 9 is installed on each safety frame a to
d can be folded in a sequentially overlapping state, and as a result, the low voltage cable 8 can be appropriately pressed and held, and the upper surface F of the outer box 6 may be damaged by vibration etc. while the vehicle 1 is running. It is possible to hold the load without it falling off.

Note that the connection position of each safety frame body a to d in the leg part e that is bendably and pivotally connected to the support column i may be arbitrarily set according to the height of the load loaded on the outer box 6. Moreover, the heights of the safety frames a to d may be set to a height that does not pose a problem to operations on the outer box 6.

[Effect of idea]

Since the present invention is constructed as described above, it has the following effects.

(1) Since a foldable safety fence is provided on the top surface of the mobile transformer, various operations on the mobile transformer vehicle can be carried out safely, reliably, quickly and easily.

(2) In the above-mentioned safety fence, the legs of the safety frame constituting the fence and the pillars that connect these legs are covered and opened by the support tube in approximately one movement. This makes it possible to easily assemble and dismantle the safety fence in a short time.

(3) Furthermore, since the safety fence itself is constructed so that it can be folded as described above, it can be used as a holding member for loaded objects such as low-voltage cables, which prevents loaded objects from falling and also protects the vehicle. Since the vehicle is folded while in motion, the height of the vehicle will not be higher than necessary, which will reliably prevent the loaded items from falling off, and will also allow for smooth movement to the construction site. can.

[Brief explanation of the drawing]

FIG. 1 is a side view of a mobile transformer equipped with a safety fence of the present invention, FIG. 2 is a perspective view showing a safety fence constructed on the mobile transformer, and FIG. 3 is a rear view of the mobile transformer.
Figures 4 to 6 are explanatory diagrams for explaining the folding order of the safety fence, Figure 7 is a perspective view showing the state in which the legs attached to the safety frame are folded, and Figure 8 is a diagram with the legs pulled up. FIG. 9 is an explanatory diagram illustrating a state before the legs and support columns are fixed by a support cylinder. 1... Vehicle, 6... Outer box, 7... Mobile transformer,
9... Safety fence, 13... Support tube, a to d... Safety frame, e... Leg, i... Support.

Claims (1)

[Scope of utility model registration request] An appropriate number of columns with a length corresponding to the height of the loaded object are erected around the top surface of the mobile transformer mounted on the vehicle, and the legs of the safety frame formed in the shape of a rectangular frame are attached to these columns. They are pivotally connected to each other by a pivot pin so that they can be raised and lowered freely, and a support cylinder is provided between the support column and the leg section, and when the safety frame is erected, a support tube is provided between the support column and the leg section. A safety fence for a mobile transformer, which covers a connecting part to hold both members vertically, and is loosely fitted so that it moves toward the legs when the safety frame is folded to the top side of the mobile transformer.