JPS6327805B2 - - 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]

For example, as a conventional technology for lighting poles,
As shown in Publication No. 57-33642, a plurality of pulleys are provided at the top of a pole that stands up from the ground,
One end of the wire that is passed around each pulley is connected to a lamp support that is movable up and down outside the pole, and the other end is connected to a balance weight placed inside the pole, and the winding wire is connected to the balance weight. There is a configuration in which the winding device is provided at the inner lower part of 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 near.

[Problem that the invention seeks to solve]

However, in the above lighting pole, the weight of the balance weight is greater than the weight of the lamp support, so a long balance weight is required. In addition, a large-sized winding device with a large capacity is required to move the balance weight up and down, and the winding device needs to be placed below the balance weight, so it is necessary to raise and lower the balance weight by a large amount. Therefore, the lowering stop position of the lamp support that has been lowered along the pole becomes higher, and the scaffolding frame must be assembled during maintenance and inspection work, which is disadvantageous.

Therefore, the technical object of the present invention is to solve the above-mentioned inconvenience and to lower the lowering stop position of the lamp support to facilitate maintenance and inspection work.

[Means for solving problems]

In order to solve the above problems, the present invention makes the weights of the liftable lamp support provided on the outside of the pole and the balance weights placed inside the pole approximately equal, and a pair of weights are provided at the top and bottom of the pole. A sprocket is provided, a part of the chain that spans between both sprockets is connected to the balance weight, the drive wheel of the chain is placed near the inspection window provided at the bottom of the pole, and the opening/closing lid of this inspection window is connected. An engagement mechanism is provided between the balance weight and the balance weight to lock and unlock the balance weight by opening and closing the opening/closing lid.

[Effect]

In the lighting pole constructed as described above, the lock of the balance weight is released by opening the opening/closing lid, and the chain is moved by rotation of the drive wheel to raise the balance weight, and conversely, the lamp support is lowered to raise the balance weight. Maintenance and inspection work for the lamp support is performed on the ground, and since the weight of the balance weight that moves in opposite directions and the lamp support are almost equal, a shorter balance weight can be used as the balance weight. . Furthermore, since the balance weight is moved up and down via the chain by the rotation of the drive wheel, it is only necessary to dispose a sprocket for guiding the chain below the balance weight, and the amount of elevation of the balance weight can be increased. Therefore, the lowering stop position of the lamp support can be brought closer to the ground, making it unnecessary to assemble a scaffolding frame for maintenance and inspection work.

〔Example〕

As shown in FIGS. 1 to 3, a plurality of pulleys 2 are provided at the top of a pole 1 that stands up from the ground, and one end of a wire 3 that is hung around each pulley 2 is fitted onto the outside of the pole 1. It is connected to a lamp support 4 that can be raised and lowered. The other end of the wire 3 is connected to a balance weight 5 placed inside the pole 1, and the balance weight 5 and the lamp support 4 are connected to each other.
is relatively moved in the opposite direction and when the lamp support 4 is raised, the protrusion 6 provided on the lamp support 4 engages with the holder 7 provided on the upper part of the pole 1. The balance weight 5 and the lamp support 4 are approximately equal in weight.

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

A pair of sprockets 9 and 10 are rotatably supported at the upper and inner lower parts of the pole 1, and a part of the chain 11 extending between the upper sprocket 9 and the lower sprocket 10 is connected to the balance weight 5. ing. Further, a drive wheel 12 is engaged with the chain 11, and the drive wheel 12 is engaged with the chain 11.
Guide wheels 13 disposed above and below 2 press the chain 11 against the drive wheel 12 and prevent the chain 11 from coming off the drive wheel 12.

This drive wheel 12 is arranged near an inspection window 14 provided at the bottom of the pole 1.
By opening the opening/closing lid 15 of No. 4, the drive wheel 12 can be rotated.

Note that the drive wheel 12 may be rotated by a handle, or may be rotated using an appropriate drive device.

In the case of FIG. 2, the opening/closing lid 15 of the inspection window 14 can be opened and closed around the pin 16 provided on the lower side, but it may be supported so that it can be opened and closed around the side sides. An engagement mechanism 20 is provided between the opening/closing lid 15 and the balance weight 5 to lock and unlock the balance weight 5 at the lowering stop position.

Here, as shown in FIG. 2, the engagement mechanism 20 includes a protrusion 21 provided on the back surface of the opening/closing lid 15, and an engagement hole 22 in which the protrusion 21 is formed in a part of the outer peripheral surface of the balance weight 5. or as shown in FIG.
It is possible to adopt a structure in which a protruding piece 21 provided on the back surface of the balance weight 5 is engaged with an upper part of a protruding shaft 23 provided on the outer peripheral surface of the balance weight 5. Here, it is preferable that the protruding piece 21 is provided so that its position can be adjusted in the vertical direction.

Note that when locking the balance weight 5 by closing the opening/closing lid 15, if the balance weight 5 moves backward, the engagement mechanism 20 may not operate. A brake plate 24 is provided to prevent the weight 5 from moving backward.

In the embodiment shown in FIG. 2, the inspection window 14 is provided behind the drive wheel 12, but as shown in FIG.
If the drive wheel 12 can be rotated through the inspection window 14, the inspection window 1 may be provided with a
4 may be in any position.

Now, when the opening/closing lid 15 is opened, the engagement between the protruding piece 21 and the engagement hole 22, and between the protruding piece 21 and the protruding shaft 23 are released, and the balance weight 5 becomes in a state where it can move upward.

Therefore, the drive wheel 12 is rotated through the inspection window 14, the chain 11 is moved, and the balance weight 5 is
When the lamp support 4 is raised, the lamp support 4 is lowered.

Since the weights of the lamp support 4 and the balance weight 5 are almost equal, the drive wheel 12 can be rotated with extremely small rotational torque, and a short balance weight 5 can be used. The lamp support 4 can be lowered close to the ground.

During maintenance and inspection work on the lamp support 4, the lamp support 4 is lowered close to the ground;
After the maintenance and inspection work, the drive wheel 12 is rotated in the opposite direction to lower the balance weight 5, and conversely, the lamp support 4 is raised to a predetermined position. Later, open/close lid 15
will be closed.

When the opening/closing lid 15 is closed, the protruding piece 21 engages with the engagement hole 22 or the protruding shaft 23, so the balance weight 5 can be locked at the lowering stop position, and the lamp support 4 can be lowered. can be prevented.

In the embodiment shown in FIG. 2, the chain 11 is moved by the rotation of the drive wheel 12, but as shown in FIG.
A worm wheel 30 may be provided coaxially with the worm wheel 30, and the worm 31 meshing with the worm wheel 30 may be rotated to move the chain 11, and the lower sprocket 10 may be used as a drive sprocket for moving the chain.

In this case, the shaft 3 is parallel to the shaft 32 of the worm 31.
3 may be constructed, and both shafts 32 and 33 may be interlocked by a gear 34, so that one shaft 32 may be used as a rotation shaft for driving the balance weight 5 upward, and the other shaft 33 may be used as a rotation shaft for driving the balance weight 5 downward. .

〔effect〕

As described above, according to the present invention, since the weights of the balance weight and the lamp support are made almost equal, the length of the balance weight can be made shorter than that of the conventional balance weight, and
Since the above-mentioned balance weight is moved up and down by a mechanism consisting of a sprocket chain, it is possible to raise and lower the balance weight by a larger amount than when the balance weight is moved up and down by a winding device. can. Therefore, the lamp support can be lowered close to the ground.
Eliminates the need to erect scaffolding frames during maintenance and inspection work,
Maintenance and inspection work can be performed extremely easily.

Further, by closing the opening/closing lid, the balance weight can be locked at the lowering stop position by the action of the engagement mechanism, thereby preventing the lamp support from lowering, which is extremely safe.

[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 cross-sectional plan view of the same, and FIG. 4 is another embodiment of the same. FIG. 5 is a cross-sectional plan view showing still another embodiment of the same. 1...Pole, 2...Pulley, 3...Wire,
4...Lamp support, 5...Balance weight,
9, 10... Sprocket, 11... Chain, 1
2... Drive wheel, 14... Inspection window, 15...
Opening/closing lid, 20...engaging mechanism.

Claims (1)

[Claims] 1 A plurality of pulleys are provided at the top of a pole that stands up from the ground, and one end of a connecting member such as a wire that is hung on each pulley is attached to a lamp support that is movable up and down outside the pole, and the other end is attached to the inside of the pole. In a lighting pole that is connected to a balance weight placed at Connect a part of the chain to the balance weight, place the drive wheel of the chain near the inspection window provided at the bottom of the pole, and place the opening/closing lid between the opening/closing lid of the inspection window and the balance weight. 1. A lighting pole characterized by being provided with an engagement mechanism that locks and unlocks a balance weight by opening and closing.