JPH10144109A - Light projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further enhance safety by positively acting a mast locking device. SOLUTION: In this light projector, an expansible elevating device 7 having a generator 5 fixedly mounted on an under carriage and illuminating lamps 8 on its upper end part consists of a plurality of means 11-14 gradually, stepwise narrowed from the lower portion to the upper portion and engageably inserted each other. A winch is interposed at the midway position of the lowermost stage mast 11. A pulley is interposed at its upper end part. Pulleys are interposed at the upper end part and the lower end part of the mast gradually, stepwise, engageably inserted in the mast, respectively. A wire rope in which its one end is locked with the power end part of the uppermost stage mast 14 is successively wound on from the pulley at the upper end part of the mast to the pulley at its lower end part. The other end of the wire rope is locked with the winch through the pulley at the upper end part of the lowermost stage mast 11. A mast locking device for fixing the uppermost stage mast 14 at the uppermost elevating position is provided. A next stage engaging member 42 and a lowermost stage locking member 43 restrict the next stage mast 13 from elevating movement during the elevating movement of the uppermost stage mast 14.

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 nighttime illumination of a civil engineering work site or the like.

[0002]

2. Description of the Related Art New construction and restoration works on roads and the like are often carried out at night due to traffic restrictions and the like, and because of the nature of the construction, moving night lighting is desired. Is used.

Conventionally, in this type of floodlight, a lifting device including a plurality of lifting rods is fixedly mounted on a chassis having front and rear wheels, and an illumination lamp is mounted on the upper end of the uppermost stage. Become
By unwinding the wire rope with a winch, the illumination lamp is moved up and down via a lifting rod.

By the way, in such a conventional floodlight, in a state in which a lighting rod is raised by raising a lifting rod,
If the wire rope is cut off, the elevating rod descends by its own weight, and the illuminating lamp descends as the elevating rod descends.

[0005] Since the illuminating lamp is quite heavy, it is very dangerous if it falls down and comes into contact with the worker's body.

Accordingly, the applicant of the present application has filed Japanese Patent Application No. Hei 6-2712.
According to No. 11, even if the wire rope is cut off with the lighting lamp raised, the uppermost lifting rod with the lighting lamp does not descend to the lowest position, and the human body by the lighting lamp Proposes a floodlight that can avoid the danger to light.

As shown in FIGS. 9 and 10, the floodlight 1 includes a movable chassis 4 having a pair of left and right front wheels 2 and a rear wheel 3, and a generator fixedly mounted on the chassis 4. 5 and a lighting device 6.

The illuminating device 6 comprises a lifting device 7 and an illuminating lamp 8 provided above the elevating device 7, and the illuminating lamp 8 generates power via a lamp stabilizer 9 by a cable (not shown). The generator 5 is turned on using the generator 5 as a power supply.

The chassis 4 is provided with a handle 10 for changing the direction of the front and rear wheels 2 and 3, and a brake device (not shown).

The elevating device 7 is provided with a first
The mast 11, and the second mast 12, the third mast 13, and the fourth mast 1 which are retractably accommodated in the first mast 11.
As shown in FIG. 11, the second mast 12 is provided in the first mast 11, the third mast 13 is provided in the second mast 12, and the fourth mast 14 is provided in the third mast 12.
The first mast 1 is installed inside the mast 13.
The first mast 12 and the third mast 13 are provided so as to extend and contract from the upper ends thereof.

The first mast 11, the second mast 12, and the third mast 12
A second mast 12, a third
Guide members 15, 16, 17 for guiding the mast 13 and the fourth mast 14, respectively, are provided. An illumination lamp mounting portion 18 is provided on the top of the fourth mast 14, and the illumination lamp mounting portion 18 has an illumination lamp. 8 is attached.

The first mast 11, the second mast 12, and the third mast
At the upper end of each of the masts 13, stopper members 19, 20, and 21 are provided to regulate the respective highest positions of the second mast 12, the third mast 13, and the fourth mast 14, while the second mast 12, The first mast 1 is provided at the lower end of each of the third mast 13 and the fourth mast 14.
1, engaging members 22, 2 which engage with stopper members 19, 20, 21 of the second mast 12 and the third mast 13, respectively.
3 and 24 are provided.

The second mast 12 and the third mast 13
Are provided with pulleys 25 and 26 and pulleys 27 and 28, respectively, as shown in FIG. Pulley 25 and pulley 2
7 is attached to the upper inner wall of the second mast 12 and the third mast 13, respectively. The pulleys 26 and 28 are respectively provided in mounting holes 29 and 30 formed in the lower wall surface of the second mast 12 and the third mast 13, respectively. It is mounted across the rod walls of the masts 12,13.

The wire rope 31 has a first mast 1 at one end.
4 and then guided in the order of pulley 27, pulley 28, pulley 25, pulley 26, and then the first mast 1
The first mast 11 is attached to 32 mounting holes formed in the upper wall surface of the first mast 11.
Is guided to the outside of the first mast 11 by a pulley 33 attached across the rod wall, and the other end is locked to a winch 34 attached to the outer wall of the first mast 11.

At a position below the guide member 17 of the third mast 13, there is provided a mast lock device 35 for fixing the fourth mast 14 at the highest position as shown in FIG. The mast lock device 35 includes a pin through hole 37 formed in a rod wall at the upper end of the third mast 13 and a fourth mast 1.
A pin through hole 36 is formed in a rod wall at a lower end portion of the fourth through hole, and the fourth mast 14 penetrates the pin through hole 37 at the highest position, and can be inserted into and removed from the pin through holes 36, 37. And a pin 38.

The pin 38 is always kept in the pin through hole 3 by an urging member 40 such as a coil spring housed in a case 39 mounted on the outer wall surface of the third mast 13.
6, 37 are urged in the insertion direction. A connecting rod 41 extends from the pin 38, and the connecting rod 41 projects outside through a through hole 42 of the case 39. A knob 43 is attached to the projecting end by screwing or the like.

According to the floodlight of the above construction, when raising the illumination lamp 8, the handle 44 of the winch 34 is turned and the wire rope 31 is wound up.

The tip of the wire rope 31 is the fourth mast 14.
When the wire rope 31 is wound up, first, the fourth mast 14 moves upward. Then, when the fourth mast 14 is raised to the highest position, that is, the engaging member 24 of the fourth mast 14
Of the mast lock device 3
The fifth pin 38 is inserted into the pin through hole 36 of the fourth mast 14 through the pin through hole 37 of the third mast 13 by the urging force of the spring 40, and the lower end of the fourth mast 14 is at the upper end of the third mast 13. Locked to the part.

Further, when the wire rope 31 is wound up by turning the handle 44 of the winch 34, the third mast 13 moves up and then moves up to the highest position, and then the second mast 12 rises. Moving.

As described above, the upper fourth mast 14 first rises, and then the lower third mast 13 and the second mast 12 gradually rise, and the respective masts 14, 13, 12 are respectively raised to their highest positions. The lamp 8 is at the highest height when the lamp 8 is raised.

The height of the illuminating lamp 8 is determined by the wire rope 3
The height can be adjusted to an arbitrary height by adjusting the winding amount.

Next, when lowering the rising illumination lamp 8, the handle 44 of the winch 34 is rotated in the reverse direction and the wire rope 31 is extended.

When the wire rope 31 is extended, first, the second mast 12 moves down by gravity. And the second
When the mast 12 descends to the lowermost position and the wire rope 31 is further extended, the third mast 13 starts to move downward by gravity and descends to the lowermost position.

When the third mast 13 is lowered to the lowest position, the fourth mast 14 is lowered.
Since the fourth mast 14 is locked to the third mast 13 by the mast lock device 35, the knob 43 is
After the pin 38 is pulled out of the pin through hole 36 via the connecting rod 41 to release the lock against the urging force of 0 and the lock is released, the handle 44 of the winch 34 is rotated in the reverse direction to draw out the wire rope 31. Then, the fourth mast 14 starts to move downward by gravity and descends to the lowest position. In this way, the masts 14, 13, 12 are stored.

In this projector, the lower end of the fourth mast 14 at the uppermost stage is locked to the upper end of the third mast 13 at the next stage by the mast lock device 35. Even in the event that the wire rope 31 is cut off in the state in which the second mast 12 and the third mast 13 are cut,
Although descending to the lowest position, the fourth mast 14 does not descend to the lowest position. Therefore, the lighting 8 attached to the uppermost mast caused by the lowering of the mast
The danger to the human body etc. by can be avoided.

[0026]

However, in such a floodlight, the first mast 11, the second mast 1
Guide members 15, 16, 17 provided at the upper ends of the second and third masts 13, the second mast 12, and the third mast 1, respectively.
Depending on how to make a gap between the third mast 14 and the fourth mast 14, the third mast in the next stage may also move upward along with the upward movement of the fourth mast 14 in the uppermost stage. There is a case where the mast lock device 35 does not operate even when the mast lock device 35 is raised to the raised position.

Conventionally, in order to eliminate such a state,
While the fourth mast 14 is moving upward, the guide members 15, 16, 17 and the second mast 1 are moved while repeating the operation of raising the fourth mast 14 so that the third mast 13 does not move upward.
2, the gap between the third mast 13 and the fourth mast 14 was finely adjusted.

For this reason, the assembling work is troublesome and requires a great number of man-hours.

Also, if the wire rope 31 is cut off in a state where the mast lock device 35 is not operating, the illuminating lamp 8 descends as the fourth mast 14 and the third mast 13 descend. There was fear.

The present invention has been made in view of the above, and an object of the invention is to provide a floodlight capable of improving safety so that a mast lock device can be reliably operated.

[0031]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a movable chassis, a generator fixedly mounted on the chassis, and a telescopic device equipped with an illumination lamp at an upper end portion. The lifting device is composed of a plurality of masts that are successively thinned from bottom to top and are fitted to each other, and a winch is provided at an appropriate halfway position of the lowermost mast, at the upper end. Pulleys are disposed, and pulleys are disposed at the upper end and the lower end of the mast that is sequentially inserted therein, and wire ropes having one end locked at the lower end of the uppermost mast are mutually connected. In the floodlight in which the mast that is inserted and inserted is sequentially wound from the pulley at the upper end to the pulley at the lower end and the other end is locked to the winch via the pulley at the upper end of the lowermost mast, Pin through hole at the lower end of the mast And a biasing member that is provided at the upper end of the next mast to which the mast is inserted and that resiliently biases in the direction of insertion into the pin through-hole, with the uppermost mast fixed at the highest position. A mast lock device
It consists of an engaging member provided at the upper end of the next mast and a locking member provided at the upper end of the lowermost mast. It is characterized in that an ascending movement restricting device for regulating is provided.

Therefore, when raising the illumination lamp, the mast of the next stage always moves upward while the mast of the next stage is fixed, so that the mast of the next stage rises with the upward movement of the mast of the uppermost stage. Without moving, the lower end of the uppermost mast is securely locked to the upper end of the next mast by the mast lock device.

Thus, even if the wire rope is cut off with the lighting lamp raised, the uppermost mast is locked by the mast lock device, so that it can be lowered to the lowest position. There is no. Therefore, it is possible to avoid danger to the human body or the like due to the illumination lamp attached to the uppermost mast, and it is possible to further improve safety.

[0034]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a side view of the same.

The same reference numerals are given to the same functional members as those of the embodiment in the above-mentioned Japanese Patent Application No. Hei 6-271221, and the overlapping description will be omitted.

The floodlight 1 of this embodiment is similar to that of the above-mentioned Japanese Patent Application No. Hei.
A chassis 4 movable as in the embodiment of No. 271211,
The lighting device 6 includes a generator 5 and a lighting device 6 fixedly mounted on the chassis 4. The lighting device 6 includes a lifting device 7 and a lighting lamp 8 provided above the lifting device 7.

The lifting / lowering device 7 is provided with a first
The mast 11, and the second mast 12, the third mast 13, and the fourth mast 1 which are retractably accommodated in the first mast 11.
4, the second mast 12 is provided in the first mast 11, the third mast 13 is provided in the second mast 12, and the fourth mast 14 is provided in the third mast 13. , The first mast 11 and the second mast 1 respectively
2. The third mast 13 is provided so as to extend and contract from the upper end thereof.

The second mast 12 and the third mast 13
Are provided with pulleys 25 and 26 and pulleys 27 and 28, respectively. The pulley 25 and the pulley 27 are attached to the upper inner wall of the second mast 12 and the third mast 13, respectively, and the pulley 26 and the pulley 28 are attached to the lower wall of the second mast 12 and the third mast 13, respectively. 30 parts are attached across the rod walls of each mast 12,13.

One end of the wire rope 31 is the fourth mast 1
4 and then guided in the order of pulley 27, pulley 28, pulley 25, pulley 26, and then the first mast 1
The first mast 11 is attached to 32 mounting holes formed in the upper wall surface of the first mast 11.
Is guided to the outside of the first mast 11 by a pulley 33 attached across the rod wall, and the other end is locked to a winch 34 attached to the outer wall of the first mast 11.

Below the guide member 17 of the third mast 13, a mast lock device 35 for fixing the fourth mast 14 at the highest position is provided.

The mast lock device 35 is provided with the third mast 13.
And a pin through hole 37 formed in a rod wall at the upper end of the fourth mast 14 and a pin through hole 37 formed in a rod wall at the lower end of the fourth mast 14.
Are formed with a pin through hole 36 which is in a penetrating state with the pin through hole 37 at the highest position, and a pin 38 which can be inserted into and removed from the pin through holes 36 and 37.

Further, in this embodiment, between the upper end of the third mast 13 of the next stage and the upper end of the first mast 11 of the lowermost stage, while the fourth mast 14 moves to the highest position,
An ascending movement restricting device 41 that regulates the ascending movement of the third mast 13 is provided.

The upward movement restricting device 41 includes an engaging member 42 attached to the upper end of the lowermost mast 11 and an engaging member 43 attached to the upper end of the next mast 13.
Consists of

The locking member 42 forms a vertical arm 45 which is integrally erected on the mounting base 44 by welding or the like, and forms a horizontal shaft 46 by bending the upper end of the vertical arm 45.
A roller 47 is rotatably supported by the horizontal shaft 46, and the mounting base 44 is mounted on the upper end of the first mast 11 by bolts 48. The horizontal shaft 46
A stopper member 49 for the roller 47 is provided at the open end of the roller.

On the other hand, the engaging member 43 is pivotally connected to the mounting base 52 integrally provided with a support member 51 having a horizontal through hole of a predetermined length by welding or the like via a horizontal shaft 53. A swing arm 54 freely supported and a hook member 55 integrally provided on the open end of the horizontal shaft 53 by welding or the like, and the mounting base 51 is connected to the third mast 1.
3 is attached to the upper end by bolts 56.

The swing arm 54 is formed by bending a horizontal position from a predetermined position of the horizontal shaft portion 53 in the lateral direction and further providing a curved portion 54a downward.
It is arranged inside the mast 13, and its lower end is provided at a position where it can be engaged with the engagement member 24 of the fourth mast 14.

The hook member 55 has an appropriate length, is hung downward from a connection portion of the swing arm 54 with the horizontal shaft portion 53, and is capable of engaging and disengaging the lower end of the hook member 55 with the roller 47 of the locking member 42. Hook 57 is formed. The hook member 55 has a center of gravity located at a lower end portion, and is provided so as to hang down by its own weight in a free state, and the hook 57 is detached from the roller 47 in conjunction with the swing of the swing arm 54 ( It turns in the direction of arrow A in FIG. 7).

Next, the operation of the above embodiment will be described.

When the illumination lamp 8 can be raised, the handle 44 of the winch 34 is turned and the wire rope 31 is wound up.

The tip of the wire rope 31 is the fourth mast 14
When the wire rope 31 is wound up because it is locked to the lower end of the first mast, first, the fourth mast 14 starts to move upward. At this time, since the ascending movement of the third mast 13 is regulated by the ascending movement restricting device 41 as shown in FIG. 7, the third mast 13 does not move up with the fourth mast 14, and the fourth mast 14 is surely moved. Only move up. And the fourth
When the mast 14 is raised to the highest position,
When the engaging member 24 of the mast 14 engages with the stopper member 21 of the third mast 13, the pin 3 of the mast lock device 35
8 passes through the pin through hole 37 of the third mast 13 by the urging force of the spring 40, and the pin through hole 3 of the fourth mast 14
6 and the lower end of the fourth mast 14 is the third mast 1
3 locked at the upper end.

On the other hand, the engaging member 24 of the fourth mast 14 pushes up the swing arm 54 to swing the swing arm 54 in the direction of arrow A in FIG. In conjunction with the swing of the swing arm 54, the hook member 55 rotates in the direction of the arrow A, the hook 57 is disengaged from the roller 47 of the locking member 42, and the lifting control of the third mast 13 is released.

In this state, when the wire rope 31 is wound up by further turning the handle 44 of the winch 34, the third mast 13 moves up and then moves up to the highest position. The mast 12 moves up.

As described above, the upper fourth mast 14 first rises, then the lower third mast 13 and the second mast 12 gradually rise, and the masts 14, 13, and 12 are respectively moved to their highest positions. The lamp 8 is at the highest height when the lamp 8 is raised.

The height of the illuminating lamp 8 depends on the wire rope 3
The height can be adjusted to an arbitrary height by adjusting the winding amount.

Next, when lowering the rising illumination lamp 8, the handle 44 of the winch 34 is rotated in the reverse direction and the wire rope 31 is extended.

When the wire rope 31 is extended, first, the second mast 12 moves down by gravity. And the second
When the mast 12 descends to the lowermost position and the wire rope 31 is further extended, the third mast 13 starts to move downward by gravity and descends to the lowermost position.

When the third mast 13 is lowered to the lowest position, the fourth mast 14 is lowered.
Since the fourth mast 14 is locked to the third mast 13 by the mast lock device 35, the knob 43 is
After the pin 38 is pulled out of the pin through hole 37 through the connecting rod 41 to release the lock against the urging force of 0 and the lock is released, the handle 44 of the winch 34 is rotated in the reverse direction to draw out the wire rope 31. Then, the fourth mast 14 starts to move downward due to gravity.

When the fourth mast 14 starts to move downward, the engaging member 24 moves away from the swing arm 54 so that the swing arm 54 becomes free, and the hook member 55 is moved by its own weight via the horizontal shaft 52. The hook 57 engages with the roller 47 of the locking member 42 to restrict the third mast 13 from rising. Then, the fourth mast 14 descends to the lowest position.

In this way, each mast 14, 13, 1
2 is stored in the first mast 11.

According to this embodiment, while the fourth mast 14 at the uppermost stage is moving upward, the upward movement of the third mast 13 at the next stage is restricted by the upward movement restricting device 41. It is not necessary to finely adjust the gaps between the members 15, 16, 17 and the outer walls of the second mast 12, the third mast 13, and the fourth mast 14, and the efficiency of the assembling operation can be improved. When raising the illumination lamp 8, the third mast 13 of the next stage is always fixed and the fourth mast 14 of the uppermost stage is first raised to the highest position. The third mast 13 at the next stage does not move upward with the upward movement of the fourth mast 14, and the lower end of the fourth mast 14 is securely locked to the upper end of the third mast 13 by the mast lock device 35. You.

Thus, even if the wire rope 31 is cut off with the illumination lamp 8 raised, the second mast 1 can be used.
The second and third masts 13 descend to the lowest position, but the fourth mast 14 does not descend to the lowest position. Therefore, it is possible to avoid danger to the human body and the like caused by the illumination lamp 8 attached to the uppermost mast caused by the lowering of the mast.

In the present invention, the number of mast stages is not limited to four, but may be two or three.
It may be more than a step.

[0064]

As apparent from the above description, according to the first aspect of the present invention, while the uppermost mast is moving upward, the upward movement restricting device for restricting the upward movement of the next mast is provided. Therefore, it is not necessary to finely adjust the gap between the guide member and the mast outer wall, and the efficiency of the assembling operation can be improved.

Also, when raising the illumination lamp, the mast of the next stage is always moved up while the mast of the next stage is fixed, so that the mast of the next stage is moved as the mast of the uppermost stage is moved up. Without moving upward, the lower end of the uppermost mast is securely locked to the upper end of the next mast by the mast lock device.

Thus, even if the wire rope is cut off in a state where the illumination lamp is raised, the mast at the uppermost stage is locked by the mast lock device, so that it can be lowered to the lowest position. There is no. Therefore, it is possible to avoid danger to the human body or the like due to the illumination lamp attached to the uppermost mast, and it is possible to further improve safety.

[Brief description of the drawings]

FIG. 1 is a front view of a floodlight according to an embodiment of the present invention.

FIG. 2 is a side view of the floodlight according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a relationship of a mast of the floodlight according to the embodiment of the present invention.

FIG. 4 is a sectional view showing a mast elevating mechanism of the floodlight according to the embodiment of the present invention.

FIG. 5 is a sectional view showing an example of a mast lock device of the floodlight according to the embodiment of the present invention.

FIG. 6 is a front view showing the upward movement restricting device for the floodlight according to the embodiment of the present invention.

FIG. 7 is a side view showing the upward movement restricting device for the floodlight according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing an operation of the ascending movement restricting device for the floodlight according to the embodiment of the present invention.

FIG. 9 is a front view showing a conventional floodlight.

FIG. 10 is a side view showing a conventional floodlight.

FIG. 11 is a cross-sectional view showing a relationship between masts of a conventional floodlight.

FIG. 12 is a cross-sectional view showing a mast elevating device of a conventional floodlight.

FIG. 13 is a cross-sectional view showing a mast lock device of a conventional floodlight.

[Description of sign]

 Reference Signs List 4 chassis 5 generator 7 elevating device 8 illumination light 11-14 mast 25-28 pulley 31 wire rope 33 pulley 34 winch 35 mast lock device 41 ascending movement restricting device 42 engaging member 43 locking member

Claims (1)

[Claims] The present invention comprises a movable chassis, a generator fixedly mounted on the chassis, and a telescopic lifting device equipped with an illuminating light at an upper end, wherein the lifting device is sequentially moved from below to above. It is composed of a plurality of masts that are thinly fitted and inserted into each other, and a winch is appropriately placed in the middle of the lowermost mast,
A pulley is arranged at the upper end, and a pulley is arranged at each of the upper end and the lower end of the mast which is sequentially inserted therein,
A wire rope, one end of which is locked at the lower end of the uppermost mast, is sequentially wrapped around from the upper end pulley of the fitted mast to the lower end pulley, via the pulley at the upper end of the lowermost mast. In the floodlight with the other end locked to the winch, a pin through hole formed in the lower end of the uppermost mast and an upper end of the next mast into which the uppermost mast is inserted are provided. A mast lock device for fixing the mast at the highest position, the mast lock device comprising a biasing member for elastically biasing in a direction to be inserted into the pin through hole, provided at the upper end of the next stage mast. And a locking member provided at the upper end of the lowermost mast, and provided with an ascending movement restricting device for restricting the ascending movement of the next mast during the ascending movement of the uppermost mast. A floodlight characterized by the above.