JP2000222931A - Floodlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stability in moving and prevent damage in storing and housing. SOLUTION: A mast 41 is standed on a movable carriage having wheels 35, 36. A lighting device 37 is arranged at top of the mast 41. The mast 41 is comprised of a plurality of mast members 42, 43, 44, 45, 46 and is retractable. A lower end part 42a of a lowermost mast member 42 fixed with a frame 32 of the carriage 31 is projected downward from the frame 32. Accordingly, position of the whole of the mast is made lower, thereby center of gravity of a floodlight is made lower. Thus stability can be improved. Especially, stability in moving can be improved because the total height of the floodlight can be made lower with the mast 41 reduced, thereby damage caused by collision with ceiling and beam can be prevented in moving and storing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floodlight used for night lighting at a civil engineering work site, for example.
The present invention relates to a light projector that can move with wheels.

[0002]

An example of such a conventional movable trailer-type floodlight will be described with reference to FIG. In the figure, reference numeral 1 denotes a truck, and the truck 1 has a frame 2 and wheels 3 and 4 rotatably provided below the frame 2. The frame 2
A generator 5 is mounted on the top, and a mast 6 is erected. The mast 6 includes a mast base 7 fixed on the frame 2 and a mast main body 9 supported on the mast base 7 by a horizontal support shaft 8 so as to be vertically rotatable. The mast main body 9 rotates between a state of standing as shown by a chain line and a state of falling as shown by a solid line. A mast receiver 10 is provided on the generator 5 for receiving the mast body 9 that has fallen. Also, the frame 2 is provided with a winch 11,
The mast main body 9 can be rotated by winding or unwinding the wire 12 around the winch 11. Further, a lamp 13 is provided at the tip of the mast body 9, that is, at the upper end in a standing state. In this floodlight, the mast main body 9 stands when used,
When not in use, the mast body 9 is tilted to lower the overall height of the projector. The reason why the overall height of the light projector is reduced in this way is to increase the stability during movement and to prevent the projector from being damaged by being hit against a ceiling or a beam during storage or storage.

However, this conventional projector has the following problem. First, since the heavy mast main body 9 needs to be knocked down or started up, workability is poor.
When the mast body 9 is defeated, the lamp 13
It is necessary to arrange the projector so as not to interfere with the power generator 5 and the like, so that the overall length of the projector becomes long. Further, the mast body 9
Since a winch 11 and a mast receiver 10 for rotating the shaft are required, the structure becomes complicated.

FIG. 9 shows another example of a conventional trailer type floodlight. In the figure, reference numeral 21 denotes a truck, which has a frame 22 and wheels 23 and 24 rotatably provided below the frame 22. A generator 25 is mounted on the frame 22, and a mast 26 is provided upright. The mast 26 is composed of a plurality of mast members 26a, 26b, 26c that gradually become thinner, and the thin mast members 26a, 26b
The b and 26c are sequentially inserted so as to be vertically expandable and contractible. The lower portion of the thickest lowermost mast member 26a is fixed to the frame 22, and a ramp 27 is provided at the upper end of the thinnest uppermost mast member 26c. In this floodlight, the mast 26 is extended when in use, and the mast 26 is extended when moving.
The overall height of the floodlight is reduced by storing 26 in a reduced size.

However, this conventional floodlight has the following problems. First of all, make the total height when stored sufficiently low,
And to secure the height when the mast 26 is extended,
The number of steps of the mast 26, that is, the number of the mast members 26a, 26b, 26c must be increased, resulting in high cost. In addition, the center of gravity is higher than that of a projector in which the mast main body 9 is tilted as described above, and there is a possibility that the projector will fall when moving.

An object of the present invention is to solve such a problem, and it is an object of the present invention to provide a floodlight capable of improving stability particularly during movement and preventing damage during storage and storage. I do.

[0007]

According to a first aspect of the present invention, there is provided a floodlight having a frame and a truck having a wheel protruding downward from the frame and rotatably provided. A mast erected on the cart, and a lighting device provided at the upper end of the mast, wherein the mast is composed of a plurality of mast members that gradually become thinner, and is thin inside a thick mast member. The mast members are sequentially inserted and configured to be vertically expandable and contractable, the lighting device is provided at the upper end of the uppermost mast member, and the lower part of the lowermost mast member is fixed to the frame of the bogie. The lower mast member has a lower end protruding downward from the frame.

In use, a mast composed of a plurality of mast members is extended, and illumination is performed by a lighting device provided at the upper end of the uppermost mast member. Further, the floodlight can be moved by a bogie having wheels. During this movement, the mast is reduced to reduce the overall height of the floodlight in order to increase stability. The mast has the lower part of the lowermost mast member fixed to the bogie frame, but the lower end of the lowermost mast member protrudes downward from the frame.
The position of the entire mast is lowered, and the position of the center of gravity of the projector is also lowered. Therefore, stability is improved. In particular, the overall height of the projector with the mast reduced is significantly lower in ratio than when the lower end of the lowermost mast member is located on the frame, and the stability during movement is improved. . In addition, although the overall height of the projector in the state where the mast is reduced in this way can be reduced, the length of each mast member including the bottom mast member can be secured. The height of the mast can be secured, and there is no need to increase the number of steps of the mast.

According to a second aspect of the invention, in the floodlight of the first aspect, a through hole is formed in the frame, and the lowermost mast member penetrates the through hole.

[0010] Thus, since the intermediate portion of the lowermost mast member enters the frame and is fixed, the support strength of the mast is improved as compared with the case where the lowermost mast member is supported only at the lower end.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the projector according to the present invention will be described below with reference to FIGS. The floodlight of this embodiment is of a trailer type and has a movable cart 31. The carriage 31 has a horizontal plate-shaped frame 32, and a drawbar 33 for connection with a towing vehicle is protruded from the front side of the frame 32. On both sides of the frame 32, wheels 35 rotatably supported by a horizontal axle 34 located below the frame 32 are provided. Further, a swivel wheel 36 is provided below the drawbar 33 as a rotatable wheel. The wheels 35 and the turning wheels 36 project downward from the frame 32. On the frame 22, a generator 38 which is a power source of a lighting device 37 described later is mounted, and a mast 41 is provided upright.

The mast 41 has a plurality of mast members 42, 43, 43, 43, 43.
44, 45, 46, and thin mast members 43, 44, 45, 46 are sequentially inserted inside the thick mast members 42, 43, 44, 45 so as to be vertically expandable and contractible. The lower portion of the thickest base mast member 42 at the lowermost portion is fixed to the frame 32 of the carriage 31, and the lighting device 37 is provided at the upper end of the thinnest mast member 46 at the uppermost portion. This lighting device 37
Has a plurality of rotatable lamps 47.

The frame 32 is formed with a vertical through hole 48 formed by a hole, and a lower portion of the base mast member 42 is inserted through the through hole 48 in a fitted state. Therefore, the lower end 42a of the base mast member 42 projects downward from the frame 32. The lower end of the base mast member 42 is lowered as much as possible to a height that does not hinder movement, for example, a height that does not interfere with obstacles on the ground. Brackets 49 are fixed to the frame 32 on both sides below the outer surface of the base mast member 42 by means such as welding, and these brackets 49 are fixed to the frame 32 by bolts 50 or the like. Reference numerals 51 and 52 are through holes formed in the frame 32 and the bracket 49, respectively, for passing the bolt 50. The portion from the lower end of the base mast member 42 to the lower surface of the bracket 49 (the portion indicated by the dimension line c in FIG. 3) is the frame 32.
Or go underneath.

Further, the base mast member 42 is provided with an electric winch 56 for expanding and contracting the mast 41. Although the expansion and contraction mechanism of the mast 41 is not described in detail, a wire 57 connected to the electric winch 56 is wound around rollers 58 provided on each mast member 42, 43, 44, 45, 46, The mast 41 extends as the wire 57 is wound around the electric winch 56, and the mast 41 contracts as the wire 57 is unwound from the electric winch 56. It should be noted that a manual winch can be used instead of the electric winch 56. The base mast member 42 including the electric winch 56 is covered with a cover 59 provided on the frame 32 except for the upper end.

Next, the operation of the above configuration will be described. The floodlight is used for nighttime illumination at a civil engineering work site such as road construction. The floodlight can be moved by running the cart 11 on wheels 35 and turning wheels 36. The height of the lighting device 37 provided at the upper end of the mast 41 can be adjusted by appropriately expanding and contracting the mast 41 by driving the electric winch 56. In use, that is, at the time of work using a light projector, illumination is performed by the lamp 47 of the illumination device 37 with the normal mast 41 extended as shown by a solid line in FIG. On the other hand, especially when moving the floodlight,
To increase stability, the mast must be
41 is stored in a reduced size, and the overall height of the floodlight is lowered.

According to the configuration of the above-described embodiment, the lower end 42a of the base mast member 42 fixed to the frame 32 of the carriage 31 is protruded below the frame 32.
41 The height of the upper end is reduced, and the position of the center of gravity of the projector is also reduced. Therefore, stability is improved, and overturn can be prevented.
In particular, the overall height of the projector when the mast 41 is reduced is significantly lower in ratio than when the lower end of the base mast member 42 is located on the frame 32, improving stability during movement. I do. Further, the stability in a state where the mast 41 is extended is improved, and the proof stress against the wind is also increased.

Although the overall height of the projector in the state where the mast 41 is reduced can be reduced in this manner, the mast members 42, 43, 44, 45, and 46 including the base mast member 42 can be reduced. Since the length can be secured, the height of the mast 41 in the extended state can be secured, and it is not necessary to increase the number of steps of the mast 41.
That is, each mast member 4 in a state where the mast 41 is reduced.
Assuming that the upper end heights of 2, 43, 44, 45, and 46 are the same, as compared to the case where the lower end of the base mast member 42 is located on the frame 32, The length of the mast members 42, 43, 44, 45, 46 can be increased. Therefore, in a state where the mast 41 is extended, the height of the mast 41 can be increased by an amount obtained by multiplying the length c entering the lower side from the frame 32 by the number of movable mast members 43, 44, 45, 46. for that reason,
With the mast 41 having a smaller number of steps, the same overall height can be secured. By reducing the number of steps of the mast 41, that is, the number of mast members 42, 43, 44, 45, and 46, the number of parts can be reduced.

Further, since the base mast member 42 penetrates through the through hole 48 formed in the frame 32, the intermediate portion of the base mast member 42 enters the frame 32 and is fixed. The support strength of the base mast member 42 and thus the mast 41 is greatly improved as compared with the case where the mast 41 is supported. Therefore, the influence of the external force applied to the mast 41 is reduced.

Next, a second embodiment of the projector according to the present invention will be described with reference to FIG. In the second embodiment,
The base mast member 42 is divided into upper and lower parts into a square tube-shaped mast accommodating portion 42b and a square tube-shaped base mast member main body 42c. And the mast storage section 42b
The base mast member main body 42c provided in advance on the frame 32
Is fixed on the frame 32 separately from the mast storage section 42b. For this fixation, a bracket 49 similar to the first embodiment is fixed to the lower end of the base mast member main body 42c,
The bracket 49 is fixed to the frame 32 with bolts or the like. With the base mast member main body 42c fixed to the frame 32 in this way, the base mast member main body 42c is coaxially connected to the mast storage section 42b. The mast storage section 42b, which forms the lower part of the base mast member 42,
It protrudes downward from 2.

Also in the second embodiment, the mast accommodating portion 42b projecting downward from the frame 32 and the base mast member body 4
Since 2c substantially constitutes the base mast member 42, the same operation and effect as in the first embodiment are obtained except for the operation and effect obtained by penetrating the integral base mast member 42 through the through hole 48 of the frame 32. can get.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the above embodiment, the number of masts 41 is five, that is, the number of mast members 42, 43, 44, 45, 46 is five.
The number of steps 41 is not limited to five. Further, in the floodlight of the embodiment, the bogie 31 has the pair of wheels 35 and the turning wheel 36, but the configuration of the wheels is not limited thereto. For example, as in the third embodiment shown in FIG.
31 having two pairs of front and rear wheels 35, that is, four carts 31
A wheel type may be used. In the above embodiment,
Although the generator 38 is mounted on the trolley 31, a type of projector that does not mount the generator 38 on the trolley 31 may be used as in the fourth embodiment shown in FIG. Further, the position of the mast 41 is not particularly limited as long as it is on a bogie, and the mast 41 may be arranged behind the axle 34 as in the fifth embodiment shown in FIG.

[0022]

According to the first aspect of the present invention, the mast which can be moved by the cart having wheels, and the mast erected on the cart is formed of a plurality of mast members that gradually become thinner, and the inner side of the thick mast member A mast member that is sequentially inserted into the mast member and is vertically expandable and contractable. A lighting device is provided at an upper end of the uppermost mast member, and a lower portion of the lowermost mast member is fixed to a frame of a bogie. In the lowermost mast member, the lower end protrudes downward from the frame, so that the position of the entire mast is lowered, so that the position of the center of gravity of the light projector can be lowered, and therefore, the stability can be improved, and By reducing the overall height of the projector with the mast reduced, stability during movement can be improved, and the projector can be prevented from being hit against a ceiling or a beam during storage or storage and damaged. In addition, although the overall height of the projector in the state where the mast is reduced can be reduced, the length of each mast member including the lowermost mast member can be secured, so that the number of mast stages is increased. The height of the mast in a state where the mast is extended can be ensured without any trouble.

According to the projector of the second aspect, in addition to the effect of the first aspect, a through hole is formed in the frame, and the lowermost mast member penetrates the through hole. Support strength can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a floodlight according to the present invention.

FIG. 2 is a side view in which a part near the base mast member is partly sectioned.

FIG. 3 is a perspective view in which a part is cut away.

FIG. 4 is a sectional view showing a second embodiment of the floodlight of the present invention.

FIG. 5 is a side view showing a third embodiment of the floodlight of the present invention.

FIG. 6 is a side view showing a fourth embodiment of the floodlight of the present invention.

FIG. 7 is a side view showing a fifth embodiment of the floodlight of the present invention.

FIG. 8 is a side view showing an example of a conventional light projector.

FIG. 9 is a side view showing another example of the conventional light projector.

[Explanation of symbols]

 31 Bogie 32 Frame 35 Wheels 36 Slewing wheels (Wheels) 37 Lighting device 41 Mast 42 Base mast member (bottom mast member) 42a Lower end of base mast member 43 Mast member 44 Mast member 45 Mast member 46 Mast member (Top) Mast member) 48 through holes

Claims (2)

[Claims] A trolley having a frame and a wheel protruding downward from the frame and rotatably provided;
A mast erected on the cart, and an illuminating device provided at an upper end of the mast, wherein the mast includes a plurality of mast members that gradually become thinner, and a thin mast is provided inside a thick mast member. The members are sequentially inserted to be vertically expandable and contractable, and the lighting device is provided at the upper end of the uppermost mast member, and the lower part of the lowermost mast member is fixed to the frame of the bogie, and the lowermost part is Wherein the lower end of the mast member protrudes downward from the frame. 2. The floodlight according to claim 1, wherein a through hole is formed in the frame, and the lowermost mast member is penetrated through the through hole.