JPH0449201B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lighting pole installed in places such as station plazas, parking lots, and expressway interchanges.

[Conventional technology]

As a conventional technology for lighting poles, for example, as shown in Japanese Utility Model Publication No. 47-38764, Japanese Patent Publication No. 57-33642, etc., a plurality of pulleys are provided at the top of a pole that stands up from the ground, and each pulley One end of the stretched wire is connected to a liftable lamp support provided outside the pole, and the other end is connected to a balance weight placed inside the pole, and a winding device for the winding wire is connected to the balance weight. There is a structure in which the pole is provided inside the pole.

In the above lighting pole, by operating the winding device, the balance weight is raised and the lamp support is lowered, so maintenance and inspection work such as replacement and cleaning of the lamp supported by the lamp support can be carried out from the ground. It is extremely convenient and allows you to work safely nearby.

[Problem to be solved by the invention]

However, in the above-mentioned lighting pole, the winding device that moves the balance weight up and down must wind the wire that moves it up and down, so the winding drum is naturally large, resulting in an increase in size.
Further, the winding device is disposed at the lower part of the pole, and if it is large, the lower part of the pole becomes abnormally thick, which is unsightly.

Furthermore, it is necessary to lock the lamp support at its highest point (illumination position) or lowest point (inspection/repair position); however, in the conventional example, this locking cannot be achieved by rotating the winding device. This is done by locking each time. If this lock is forgotten, when some kind of impact is applied to the lighting pole, the lamp support may move up and down, potentially injuring passersby or workers.

In addition, since the balance weight is suspended in the air,
Not only does it shake when it moves up and down, making it difficult for it to function smoothly, but it also shakes easily due to external shocks, and the shaking is transmitted to the lamp support via the wire, causing damage to the lamp and the like. There is also fear.

SUMMARY OF THE INVENTION An object of the present invention is to miniaturize the vertical movement mechanism for the balance weight, to automatically lock the vertical movement thereof, and to prevent the balance weight from swinging.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a lamp support on the outside of a pole that stands up from the ground so that it can slide along the length of the pole, and a lamp support that is movable in the length direction within the pole. In the conventionally known lighting pole in which a balance weight is provided, and the lamp support and the balance weight are connected and interlocked by a suspended flexible strip via a pulley provided on the pole, the balance weight is threadedly engaged. A threaded rod is placed parallel to the axis of the pole and its upper and lower ends are rotatably supported, and a drive shaft that intersects the threaded rod is provided at the lower part of the pole, and the drive shaft and the threaded rod A gear transmission mechanism for transmitting the rotation of the drive shaft to the threaded rod is provided between the balance weight and the pole, and a means for preventing rotation of the balance weight is provided between the balance weight and the pole.

[Effect]

In the lighting pole constructed as described above, when the drive shaft is turned to rotate the threaded rod, the balance weight, which cannot be rotated, moves within the pole as the threaded rod rotates, and is connected as it moves. The lamp support also moves along the pole. Therefore, by rotating the drive shaft, the lamp support is moved to the illumination position or the inspection/repair position.

In addition, since the balance weight moves only by the rotation of the threaded rod, it will not move unless the threaded rod rotates.In other words, when the threaded rod stops rotating, the balance weight is locked in that position, and the lamp support will also be locked.

Furthermore, since the balance weight is prevented from rotating and is threadedly engaged with a threaded rod supported by a pole, it does not shake even when it moves up and down or when an external impact is applied.

〔Example〕

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

As shown in Figures 1, 2, and 4, a plurality of pulleys 2 are mounted on the top of a pole 1 that stands up from the ground.
are provided, and one end of the wire 3 that is hung around each pulley 2 is connected to a lamp support 4 that fits on the outside of the pole 1 and is movable up and down. The other end of the wire 3 is connected to a balance weight 5 placed inside the pole 1, and both the balance weight 5 and the lamp support 4 move in opposite directions reciprocally, causing the lamp support 4 to rise. Then, the lamp support 4
The protrusion 6 provided on the pole 1 is connected to the support 7 provided on the top of the pole 1.
It is becoming more and more engaged. The weight of the balance weight 5 is slightly heavier than the weight of the lamp support 4.

Note that 8 indicates a lighting fixture attached to the lighting fixture support 4.

The balance weight 5 has an insertion hole 9 passing through it vertically, and a screw hole 10 coaxially with the insertion hole 9.
and a threaded rod 1 inserted into the insertion hole 9.
1 is threadedly engaged with the screw hole 10. This threaded rod 11 extends in the vertical direction of the pole 1, and its upper and lower ends are rotatably supported by the upper and lower parts of the pole 1, and when the threaded rod 11 is rotated, the balance weight 5 moves up and down.

In this case, if the balance weight 5 rotates together with the threaded rod 11, the balance weight 5 cannot be moved up and down, so it is necessary to prevent the balance weight 5 from rotating.

Figures 6 and 7 show the balance weight 5.
In the case of FIG. 6, a guide rail 12 is provided in the axial direction of the inner surface of the pole 1, and the balance weight 5 is provided with a notch 13 into which a part of the guide rail 12 fits. This is what I did. In the case of FIG. 7, the cross section of the pole 1 is polygonal, and a protrusion 15 provided on the balance weight 5 is fitted into one corner 14 on the inside thereof.

An inspection window 17 that can be opened and closed by a lid 16 is provided at the lower part of the pole 1, and a bearing 18 is provided at the inner lower part of the pole 1 near the inspection window 17. A drive shaft 19 is rotatably supported by the bearing 18, and the rotation of the drive shaft 19 is transmitted to the threaded rod 11 by bevel gears 20 that mesh with each other. Note that a worm wheel can be used instead of the bevel gear 20.

The embodiment has the above configuration, and when performing maintenance and inspection work on the lamp support 4, the inspection window 17 is opened,
The drive shaft 19 is rotated by rotating the handle or using an appropriate drive device.

Now, when the drive shaft 19 is rotated, the rotation is transmitted to the threaded rod 11, so that the balance weight 5, which is threadedly engaged with the threaded rod 11, moves in the vertical direction.

Therefore, when the balance weight 5 is increased,
Conversely, the lamp support 4 descends, and at this time, since the weight of the lamp support 4 is slightly lighter than the weight of the balance weight 5, the drive shaft 19 can be rotated with an extremely small rotational torque. Also,
The balance weight 5 has a lowering stop position near the mounting position of the drive shaft 19 and moves upwards from there, so it has a long movable distance and can lower the lamp support 4 close to the ground. Maintenance and inspection work for the lamp support body 4 is performed at .

As shown in FIG. 3, a movable pulley 21 is attached to the top of the balance weight 5, the wire 3 hanging from the top of the pole 1 is wrapped around the movable pulley 21, folded upward, and its end is fixed to the top of the pole 1. Since the amount of movement of the lamp support 4 can be doubled relative to the amount of movement of the balance weight 5, the lamp support 4 can be moved by simply moving the balance weight 5 to the center in the length direction of the pole 1. It can be lowered to a position close to the ground, that is, to a position where the drive shaft 19 is rotated.

〔Effect of the invention〕

The present invention is constructed as described above, and the balance weight is moved by screw connection, so the mechanism for turning the threaded rod is more compact than the conventional winding device. For this reason, the lower part of the pole does not become abnormally thick, resulting in a good appearance.

Furthermore, since the movement of the balance weight is automatically locked by the screw connection, there is no fear that the balance weight will move due to an impact or the like and the lamp support will also move.

Furthermore, the balance weight is prevented from rotating, and the threaded rod supported by the pole is threadedly engaged, so it moves without shaking when it moves up and down, and its action is smooth. It does not shake even if a shock is applied. Therefore, there is no risk of damage or falling of the lighting equipment due to the swinging of the balance weight.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the lighting pole according to the present invention, FIG. 2 is a longitudinal sectional front view of the same, FIG. 3 is a longitudinal sectional front view showing another embodiment of the same, and FIG.
The figure is a top cross-sectional plan view of FIG. 2, FIG. 5 is a top cross-sectional plan view of FIG. 3, and FIG. 6 and FIG. . 1...Pole, 2...Pulley, 3...Wire (suspended flexible body), 4...Lamp support, 5...Balance weight,
10...Threaded hole, 11...Threaded rod, 19...Drive shaft.

Claims (1)

[Claims] 1. A lamp support 4 is provided on the outside of a pole 1 that stands up from the ground so as to be slidable along the length direction of the pole, and a balance weight 5 is provided inside the pole 1 so as to be movable in the length direction. 4 and a balance weight 5 are linked together by a suspended flexible strip 3 via a pulley 2 provided on the pole 1. In this lighting pole, a threaded rod 11 threadedly engaged with the balance weight 5 is attached to the pole 1.
The upper and lower ends of the pole are arranged parallel to the axis of the pole and rotatably supported, and a drive shaft 19 that intersects the threaded rod is provided at the lower part of the pole, and the drive shaft 19 and the threaded rod 11 In the meantime, the rotation of the drive shaft 19 is controlled by the threaded rod 11.
A lighting pole characterized in that a gear transmission mechanism is provided for transmitting a signal, and a means for preventing rotation of the balance weight 5 is provided between the balance weight 5 and the pole 1.