JP2003317531A - Hoisting device for illuminator frame in floodlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting device for an illuminator frame in a floodlight in which the hoisting operation can be carried out with a small device and is constituted to be small in size and low in cost. <P>SOLUTION: In the hoisting device 30 of the floodlight 1, the illuminator frame 20 and a weight 33 are connected by a supporting wire 32 which is hung on a pulley 31 installed on a top end of a pole 10. A driving wire rope 35 hung on a driving pulley block 34 provided on a bottom side of the weight 33 is wired to a draw gear 40 provided inside a base of the pole 10. The illuminator frame 20 is hoisted by operating the movement of the weight 33 through the driving wire 35 rope by the draw gear 40. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting tower, which is used for wide area lighting such as a public plaza, a parking lot, or an airport facility, and which is provided with a lighting stand for supporting an illuminator on an upper portion of a supporting pillar member. The present invention relates to a lifting device that lifts and lowers a gantry.

[0002]

2. Description of the Related Art As a lighting tower in which an illumination stand for supporting an illuminator is provided at the tip of a supporting column member (pole) having a predetermined height, the illumination stand can be installed near the ground when replacing or maintaining the illuminator. Some are equipped with a lifting device that can be lowered.

Various constructions of such a device for raising and lowering an illumination pedestal have been proposed, for example, as disclosed in Japanese Patent Laid-Open No. 7-73272.

As shown in the conceptual diagram of FIG. 10, this is because a lighting stand 20 'which is loosely fitted to the outside of the support pillar 10' and a counterweight 33 'which is located inside the hollow support pillar are supported pillars. The winding wire rope 93 connected to the bottom of the counterweight 33 'is connected to the lifting wire rope 92 arranged via a pulley 91 provided at the upper end of 10', and the supporting column 10 'is connected to the winding wire rope 93. It is configured to be wound by a winding device 94 provided in the base of the. The weight of the counterweight 33 'is set to be lighter than the total weight of the illumination pedestal 20' including the luminaire 21 ', and the winding wire rope 93 affected by the weight difference is wound and unwound by the winding device 94. The lighting stand 20 'is moved up and down.

A plurality of elevating wire ropes 92 and winding wire ropes 93 are arranged side by side so that the illumination pedestal 20 'will not drop even if cut.

[0006]

However, in the lifting device having a plurality of winding wire ropes as described above, it is necessary to synchronize the plurality of winding wire ropes with each other. The winding device is complicated.
There was a problem of increasing the size.

That is, if a pair of (two) winding wire ropes are wound by independent winding devices, a large installation space is required because the number of winding devices is two. In addition, even if the pair of winding wire ropes is wound around the drum of one winding device, the drum becomes large and a large space is required, and in order to avoid this, the wire rope is attached to the drum. If it is configured to be wound in stages, it is difficult to synchronize the winding, which hinders smooth ascent and descent.

[0008] When the winding device is thus increased in size, the support column is increased in size, resulting in an increase in weight and an increase in manufacturing and installation costs.

The present invention has been made in order to solve the above-mentioned problems, and ascending / descending device for an illumination pedestal in an illuminating tower, which can be operated by a small device and can be constructed in a small size and at low cost. The purpose is to provide.

[0010]

In order to achieve the above-mentioned object, a lifting / lowering device for an illumination pedestal in an illumination tower according to the present invention comprises an illumination pedestal for supporting an illuminator provided on an upper part of a support pillar member. The illumination pedestal and the connecting weight member located inside the support pillar member are connected through an elevating support rope that is wound around a guide pulley member provided at the upper end of the support pillar member, and A traction device is provided in the base of the support pillar member for moving and operating a drive rope wound around a sheave that is rotatably driven by a drive means by rotating the sheave and moving the sheave position. It is characterized in that the lighting stand is configured to be moved up and down by moving the connecting weight member via a drive cable.

Further, the drive rope is constructed such that one end thereof is fixed to the base portion of the support pillar member and the movable pulley member mounted on the connecting weight member is wound to be arranged in the traction device. It is characterized by

In addition to the above structure, the moving speed of the auxiliary rope member interlocking with the connecting weight member and the auxiliary rope member is detected, and the auxiliary rope member is meshed and locked at a predetermined moving speed or more. And a fall prevention engagement device.

Further, a winding device for winding and accommodating the drive rope around a reel member is provided below the pulling device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical cross-sectional view in which a part of an illumination tower to which a configuration example of a lifting / lowering device for an illumination pedestal in an illumination tower according to the present invention is applied is omitted, and FIG. 2 is a plan view thereof.

The illustrated illumination tower 1 is provided with an illumination pedestal 20 that supports an illuminator 21 at the upper end of a pole 10 having a predetermined height as a support pillar member, and an elevating device 30 that elevates and lowers the illumination pedestal 20. Is configured.

The pole 10 is formed into a cylindrical shape having a predetermined diameter and is tapered with a predetermined taper, and an engaging support mechanism 11 for engaging with the illumination pedestal 20 is provided at the tip of the pole 10.
A lifting device 30 is provided inside.

The illumination pedestal 20 is formed in a frame shape around a central annular portion 20A that is loosely fitted to the pole 10, and is loosely fitted to the pole 10 at the central annular portion 20A, and is engaged at a predetermined position at the upper end of the pole 10. It is adapted to be fixed by the joint support mechanism 11. When the engagement by the engagement support mechanism 11 is released, it can be raised and lowered, and can be lowered to a predetermined position near the ground by driving the lifting device 30.
At the lower limit position, as shown in FIG. 8, the central annular portion 20A
Is supported by a lower limit support ring 10A provided around the pole 10.

The lifting device 30 includes pulleys 31 (3) as guide pulley members arranged at the upper ends of the poles 10, respectively.
1L, 31R) and a pair of (two) support wires 32 (32L, 32R) as lifting support ropes wound around the lighting pedestal 20 and a weight 33 as a connecting weight member located inside the pole 10. FIG. 4 is a partially enlarged view of the weight 33 connected to the pole 10 inside the base of the pole 10 and FIG. 3 is a sectional view taken along the line AA of FIG. 3; FIG. 4 is a sectional view taken along the line BB of FIG. 3; 5 (A), a traction device 4 provided as shown in FIG. 5 (B), which is a sectional view taken along line CC of FIG.
It is configured to perform a moving operation at 0.

The weight 33 is shown in an enlarged view in FIG.
As shown in (A) and its side view (B), a drive pulley 34 as a moving pulley member is provided on the lower side thereof, and a drive wire rope 35 as a drive rope is hung on the drive pulley 34. It has been turned. The weight 33 is provided with an auxiliary sheave 36 coaxial with the drive sheave 34 around which an auxiliary wire rope 37 as an auxiliary rope member, which will be described later, is routed along the same path as the drive wire rope 35. Further, in FIG. 1, the drive wire rope 35
The drive wire rope 35 does not appear properly because the auxiliary wire rope 37 is superposed on the front side of, but the auxiliary wire rope 37 is shown as the drive wire rope 35 for easy understanding.

The drive wire rope 35 has a tension sensor 50 attached to the support beam 12 whose end is disposed in the base of the pole 10.
And the drive pulley 34 is wound around and the traction device 4 is connected.
It is routed to 0.

Although the detailed description is omitted, the towing device 40 winds a moving rope (driving wire rope 35) around a driving sheave as a sheave connected to a motor 41 as a driving means through a speed reducer, This is a so-called winder configured so that the winding position of the moving rope relative to the drive sheave moves relative to the drive sheave by the rotation drive of the drive sheave by the motor 41. It is designed to move.

Here, the weight of the weight 33 depends on the illuminator 2.
The weight 3 is set to be a predetermined amount lighter than the total weight of the illumination pedestal 20 and the weight 3 in the free state due to the weight difference.
3 rises (the lighting pedestal 20 descends), and therefore the weight difference force acts on the drive wire rope 35 reciprocally routed through the pulley 34 of the weight 33. Since the pulley 34 of 33 is a moving pulley, the movement drive amount of the drive wire rope 35 is twice the movement amount of the weight 33, but the traction device 40 can be moved and driven by a force of half the weight difference. .

The traction device 40 includes a brake device which is in a working state by a spring or the like when not driven and which is released by an actuator which is energized during a driving operation,
The brake device is provided with a release means for manually releasing the brake device by operating the manual release lever 42 and a manual handle 43 that can be manually driven, and should the drive by electric power become impossible due to a power failure or the like. , Through a normally closed maintenance opening 10B formed in the base of the pole 10,
Operate the manual release lever 42 to release the brake device,
It can be manually driven by operating the manual handle 43.

The pulling device 40 detects the moving speed of the drive wire rope 35 at the lead-in portion of the drive wire rope 35, and drives the locking claw when the speed exceeds a predetermined speed movement. A lock mechanism 44 that engages with the rope and stops the drive rope is provided, so that the drive wire rope 35 moves uncontrollably in the traction device 40 due to some cause (in this case, the illumination pedestal 20).
Even when the lighting stand 20 falls, the drive wire rope 35 can be immediately stopped to prevent the lighting pedestal 20 from falling.

Further, the traction device 40 is provided with an auxiliary lock mechanism 45 as a fall prevention engagement device having a similar structure adjacent to the lock mechanism 44, and the auxiliary lock mechanism 45 has a drive wire rope. In the same path as 35 (that is, the end is connected to the support beam 12 via the tension sensor 50 and the auxiliary pulley 36 coaxial with the pulley 34 provided on the weight 33 is wound to reach the traction device 40). The routed auxiliary wire rope 37 is routed through.

The auxiliary lock mechanism 43 is used for the ordinary lighting stand 2.
The auxiliary wire rope 37 is passed with almost no resistance at the time of raising and lowering 0, and when the moving speed becomes equal to or higher than a predetermined predetermined speed movement, the auxiliary wire rope 37 is engaged and stopped. As a result, even if the drive wire rope 35 is cut, the lighting stand 20 can be prevented from falling.
The auxiliary rope member (auxiliary wire rope 37) does not necessarily have to be routed along the same path as the drive wire rope 35. Even if the speed is different from that of the drive wire rope 35, it may be configured to hang from the weight 33. It is a good one.

As shown in an enlarged view in FIG. 7, the tension sensor 50 provided at the connecting portion of the drive wire rope 35 with the support beam 12 has a bracket 5 on a top plate 52 of a cylinder portion 51.
Limit switch 54 is provided via 3,
A connecting fitting 56 is attached to the tip of an operating rod 55 protruding from the upper surface plate 52, and is provided by being connected to the support beam 12 at the bottom of the cylinder portion 51.
6 drive wire rope 35 and auxiliary wire rope 37
Are combined.

In the cylinder portion 51, an operation rod 55 having an operation plate 55A at its lower end is inserted inside a cylinder 51A having a bottomed cylindrical shape, and the locking plate 55A of this operation rod 55 and the upper portion of the cylinder 51A. A coil spring 51B is interposed between the coil spring 51B and the upper plate 52 that closes the opening end, and the coil spring 51B is configured to urge the operating rod 55 to move downward by its elastic return force.
As a result, the operating rod 55 coupled to the drive wire rope 35 via the connecting fitting 56 is located at the lower limit in a state where no tension is applied to the drive wire rope 35,
When tension acts on the drive wire rope 35, it can move upward by a predetermined amount against the biasing force of the coil spring 51B.

The limit switch 54 has its sensor arm 54A positioned below the connecting fitting 56, and is swingably operated by the connecting fitting 56 in a state in which the sensor arm 54A is not under tension on the drive wire rope 35. In addition, the swing operation is released when tension is applied to the drive wire rope 35.

In the tension sensor 50 having such a configuration, when the illumination pedestal 20 reaches the lower limit of its ascending / descending range and is placed on the support ring 10A and the tension of the drive wire rope 35 disappears, the limit switch 54 is operated, The lifting device 3
The fact that the lower limit of the illumination pedestal 20 has reached the lower limit is transmitted to the control device for driving and controlling 0 as driving stop information.

A winding device 60 for winding and accommodating the drive wire rope 35 and the auxiliary wire rope 37 drawn out from the traction device 40 is provided below the traction device 40.

The winding device 60 includes a drive wire rope 35.
And a pair of reels 61, 62 as reel members for winding the auxiliary wire rope 37 are coaxially arranged in series and are rotationally driven by a gear motor 63 via a torque clutch. Drive wire rope 35 and auxiliary wire rope 37 that are led out
Is capable of being wound or unwound while maintaining a predetermined tension.

The lifting device 30 constructed as described above is
When the driving wire rope 35 is driven to move by the towing device 40, the lighting pedestal 20 is installed at the upper end of the pole 10 (shown in FIG. 1) and at a maintenance position near the ground (see FIG. 8).
Can be raised and lowered between the two).

The traction device 40 includes a drive wire rope 35.
Since it is not wound on the drum, it can be made extremely small, and the drive wire rope 35 and the auxiliary wire rope 37 drawn out from the traction device 40 are the winding device 6
The winding device 60 can be easily wound and unwound so that the winding device 60 simply winds and unwinds and does not participate in the up-and-down drive of the illumination pedestal 20. . Furthermore, the traction device 40
The drive wire rope 35 which is driven to move by the weight 33 is reciprocally routed through the pulley 34 of the weight 33 to
Since 3 (pulley 34) is a moving pulley, the traction device 4
0 can be moved and driven by a force that is half the weight difference between the illumination pedestal 20 and the weight 33, and a small size with a small capacity can be used without significantly increasing the weight of the weight 33 (even if the weight difference is large). it can. As a result, the entire structure including the pole 10 can be made extremely small and lightweight, and the manufacturing and installation costs can be suppressed. The movable pulley (pulley 34) is not necessarily used, and the drive rope directly coupled to the weight 33 may be moved by the traction device 40 if a sufficient movement drive force is obtained. It is a thing.

By the way, the power cable for supplying electric power to the lighting stand 20 and the information cable for transmitting failure information of the illumination lamp, etc. are allowed to move when the lighting stand 20 is moved up and down by the lifting device 30 as described above. Needs to be routed. Therefore, as conceptually shown in FIG. 9, the power cable 71 is routed from the ground to the upper end of the inside of the pole 10 and once fixed, and then is moved to a position within the pole 10 and set to a predetermined weight. It is wound around a pulley 73 (power cable moving pulley 73P) and is routed to the illumination pedestal 20 via a power cable pulley 72P arranged at the upper end of the pole 10. The information cable 74 is also provided symmetrically to the power cable 71. Therefore, the power cable pulley 72P and the information cable pulley 72D are arranged at the upper end of the pole 10 at symmetrical positions with the center of the pole 11 interposed therebetween (these power cable pulleys 72P). As shown in FIG. 2, the information cable pulley 72D and the pulleys 31L and 31R that guide the support wires 32L and 32R are circumferentially displaced from each other by 45 °. Two cables in parallel for the cables 71, 74 (power cable moving pulley 7
3P and information cable moving pulley 73D). The amount of movement of the cable movable block 73 associated with the raising and lowering of the illumination pedestal 20 is 1/2 of the amount of movement of the illumination pedestal 20, and its position is always greater than the weight 33 that is the same amount of movement as the amount of elevation of the illumination pedestal 20. It is located above and is set not to interfere.

[0036]

As described above, according to the lifting / lowering device for the illumination pedestal in the illumination tower according to the present invention, the illumination pedestal and the connecting weight member located inside the support pillar member are provided at the upper end of the support pillar member. By a rotation of the sheave, a drive rope wound around a sheave that is connected to a guide sheave member provided through an elevating and lowering support rope that is wound around and is rotated by a drive means is provided in the base portion of the support pillar member. A traction device for moving the winding position to operate the traction device is provided, and the traction device is configured to move the connecting weight member via the drive rope to drive the lighting pedestal up and down. Since the device does not wind the drive rope around the drum, it can be made extremely small, and the entire device can be made small and lightweight, and the manufacturing and installation costs can be suppressed.

Further, since the drive rope has one end fixed to the base portion of the support column member and the movable pulley member attached to the connecting weight member is wound around and arranged in the traction device, Since the traction device can be moved and driven by a force that is half the difference in weight between the lighting pedestal and the connecting weight member, it can be used with a small capacity and can be made smaller and lighter.

Further, an auxiliary rope member which interlocks with the connecting weight member, and a fall prevention engagement device which detects the moving speed of the auxiliary rope member and meshes and locks the auxiliary rope member at a moving speed equal to or higher than a predetermined speed. With this configuration, even if a trouble occurs in the towing device or the drive cable is cut, the lighting stand can be prevented from falling.

Further, since the winding device for winding up and storing the drive rope around the reel member is provided below the pulling device, the drive rope can be easily received and wound up. It is possible to make it small in size because it can be wound and unwound only and accuracy is not required.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view in which a part of an illumination tower to which a configuration example of a lifting / lowering device for an illumination pedestal in an illumination tower according to the present invention is applied is omitted.

FIG. 2 is a plan view of an illumination tower.

FIG. 3 is an enlarged cross-sectional view of a pole base portion on which a traction device is arranged.

4 is a cross-sectional view taken along the line AA of FIG.

5A is a sectional view taken along line BB of FIG. 3, and FIG. 5B is a sectional view taken along line CC of FIG.

FIG. 6 is an enlarged view of a weight.

FIG. 7 is an enlarged view of a tension sensor.

FIG. 8 is a vertical cross-sectional view in which a part of the illumination tower in which the illumination mount is at the lower limit position is omitted.

FIG. 9 is a conceptual diagram showing a wiring state of power cables.

FIG. 10 is a conceptual diagram of a lifting / lowering device for a lighting pedestal as a conventional example.

[Explanation of symbols]

1 lighting tower 10 poles (support pillar members) 20 Lighting stand 21 Illuminator 30 Lifting device 31 (31L, 31R) Pulley (guide pulley member) 32 (32L, 32R) Support wire (elevation support rope) 33 weight (connecting weight member) 34 Drive pulley (moving pulley member) 35 Drive wire rope 37 Auxiliary wire rope (auxiliary rope member) 40 traction device 41 Motor (drive means) 45 Auxiliary lock mechanism (fall prevention engagement device) 60 winding device 61 reel (reel member)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Sei Uoyama             1-1-1 Minamiaoyama, Minato-ku, Tokyo             Saw Co., Ltd. (72) Inventor Hirofumi Utsumi             2-35-13 Kameido, Koto-ku, Tokyo Residence             Inside the light-nippon engineering (72) Inventor Yoshihiro Hamada             2-35-13 Kameido, Koto-ku, Tokyo Residence             Inside the light-nippon engineering

Claims (4)

[Claims] 1. A lighting tower comprising a lighting stand for supporting an illuminator provided on an upper part of a supporting pillar member, wherein the lighting stand and a connecting weight member located inside the supporting pillar member are the supporting pillars. A drive rope wound around a sheave that is connected to a guide pulley member provided at the upper end of the member via an ascending / descending support rope that is wound around and is rotatably driven by drive means in the base portion of the support pillar member. A traction device for moving and operating a winding position by rotation of the sheave is provided, and the traction device moves and operates the connecting weight member via the drive rope to drive the lighting mount up and down. A lifting / lowering device for a lighting pedestal in a lighting tower, comprising: 2. The drive rope is configured such that one end thereof is fixed to a base portion of the support pillar member and the movable pulley member mounted on the connecting weight member is wound around and is arranged in the traction device. The raising / lowering device of the illumination mount in the illumination tower according to claim 1. 3. An auxiliary rope member that interlocks with the connecting weight member, and a fall prevention engagement device that detects the moving speed of the auxiliary rope member and meshes and locks the auxiliary rope member at a moving speed equal to or higher than a predetermined speed. 3. The lifting / lowering device for the illumination pedestal in the illumination tower according to claim 1 or 2, comprising: 4. The lighting device according to claim 1, further comprising a winding device that winds and accommodates the drive rope around a reel member, below the pulling device. Lifting device for the lighting platform in the tower.