DE2107573A1 - Carrying device for electrical installation supports at elevated points - Google Patents

Description

Description of the patent application

Meyer Manufacturing, Inc., Red Wing, Minnesota, USA

"concerning

Carrying device for electrical installation supports at elevated points.

The invention relates to a support device for electrical Installation support at elevated points, with a mast arranged on a base, at the top of which runs transversely Support arms are provided.

Large light masts, such as those used to illuminate sports fields and stadiums, show in one Height often more than 30 m (more than 100 feet) one Number of fixed lamp holders on. However, these lamps can only be serviced xm by workers Climbing the light poles. Climbing these poles requires expensive special equipment, which are required for security reasons. There must also be Care must be taken that the worker is safe around the after he has reached the top of the mast Mast can move around.

The advances in the field of lighting technology have recently made it possible to cut entire motorway sections or high-speed intersections with fewer, To illuminate extremely high-intensity larape carriers that are suspended at particularly high points. Besides that it is often required - other sources of illumination, for example Signboards or advertising lights, on extreme

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high points around the one using the expressway Car travelers, motels or service stations (petrol stations or rest stops) indicate if these facilities at some distance from the road in question, so that they would otherwise not be seen by the traveler. All such devices containing lighting elements require frequent maintenance. The so far However, known lighting arrangements require a high expenditure of time and money for maintenance.

The invention is based on the object of creating a device of the type mentioned at the outset in which it is possible, the lighting fixtures with relatively low cost, little time expenditure and without danger to the Maintain, maintain and repair the workers performing the maintenance work.

According to the invention, this object is achieved in that the mast 1o is tubular and hollow; that a holding frame 23 is provided at the top of the mast, which has electrical distribution lines 26.1; that at the top of the mast and on the arms there are rollers 17, 18 are provided, over which the holding frame 23 hanging supporting calves 21 are guided; that near the pedestal the mast is provided with a counterweight 25 suspended from the suspension cables 21; that the distribution lines 26.1 over a power cable 27 can be supplied with power, which is passed through a roller 44 arranged at the top of the mast is; that the power cable is anchored to the counterweight; and that at the bottom of the mast one can be connected to the power cable Power source 31 is provided.

The invention is therefore a light mast on the lamp holder with corresponding lighting fixtures be set up at a sufficient height so that workers can only reach the lighting arrangement under great danger

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and be able to wait «The lamp holders are on a holding frame arranged, which is separated from the box and for the Y / types of the lighting arrangement arranged on the holding frame can be singed to the ground. The holding frame is normally in the raised position and is locked with support arms, which are provided at the top of the mast, so that a wobbling or a swinging movement of the frame can be prevented. The holding frame is carried by suspension cables, which are attached to a counterweight Connected to the ground sina.

For maintenance purposes, the holder can be opened by lifting the Counterweight to be lowered. The lamps are supplied with power via a counterweight anchored Power cable, which can be detachably connected to a power source at the base of the Hastes. One over a role Lifting cable at the tip of the hurry enables the lifting weight to be raised and the holding frame to be lowered The counterweight is raised by an "inde" on the base of the hurry.

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The following are exemplary embodiments of the invention based on the drawing described in detail. It shows

Figure 1 shows a light mast with a support device, in which the holding frame is shown in dashed lines in the partially lowered position, in the view, partially broken away;

Figure 2 shows an embodiment of the invention in perspective Representation, partly broken away;

Figure 3 shows the upper end of the mast and the support device in an enlarged Scale in plan view;

FIG. 4 shows a detail section approximately along the line 4-4 of FIG. 3, with parts of the device for greater clarity of the Detailed representation have broken away;

a section approximately along the line 5-5 of Figure 3 in enlarged individual representation;

FIG. 6 an enlarged sectional view through a vertical, plane passing through the base and the base of the mast;

FIG. 7 shows an enlarged section, approximately along the line 7-7 of Figure 6;

Figure 8 is a schematic representation of the various cables and their mutual arrangement within the mast and

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Figure 9

another embodiment of the mast and the support device in a perspective view, partly broken away.

A tubular mast 1o, which is made of flat sheet steel is made, has a large number of flat side surfaces and tapers from the foot to the tip. The mast 1o has a base plate 11 which is fastened by means of anchoring bolts 12 on a metal base 13, which is embedded in the ground. For the Anchor Bolts ™

transverse and diagonal struts 12a are provided in the concrete base.

As can be seen in Figure 2, the top of the tower 14 is made separately, and is on the main part of the tower by means fastened by bolts connected flanges.

On the upper part or at the top 14 of the mast, support arms 15 are attached, for example welded, which are horizontal from the top of the mast in different directions stick out.

The support arms 15 are tubular, with their interior lying Ends are aligned with slots or openings 16 in the adjacent side wall of the mast. Preferably are Stiffening battens 14a provided which the arms when Support carrying the load.

On near the outer and the inner end of each of the support arms 15 fixedly attached bearing bolts 19, 20 are lumps 17, 18 stored. Suspension cables 21 are drawn over the halls 17 and 18, which is attached to a holding frame 23 by means of fittings 22 are. The carrying quays 21 run from the tunnel 18 aue down through the entire length of the mast 1o and are attached to a counterweight 25 by means of fittings 24

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attached, which is dimensioned so that the holding frame 23 is held up against the support arms 15, v / ie it is evident from the drawing.

The rigid, hollow holding frame 23 has in the drawing apparent type rectangular cross-section. However, the frame can also have a round cross-section. Like on is best shown in Figure 2 and 3, the holding frame is hexagonal so that it the mast 1o and its Tip 14 may include but the frame may have any other shape. The holding frame 23 carries on Holders 26a electric lamp holder 26, namely 3 pieces in the embodiment shown. It can, however any number of lamp holders in any desired position and mutual orientation can be provided on the frame, depending on the purpose for which the facility will be used target. The holding frame 23 encloses distribution lines 26.1 for the lamp carriers 26.

The distribution lines and lamp holders 26 are supplied with electricity via a power quay. The;> power cable 27 is -of a roller 28 supported on a closed bracket 29 which is attached to the top 14 of the mast is. One end of the power cord 27 is mechanically attached to the support frame 23 and electrically to the distribution lines 26.1 connected. The other end of the power cable 27 runs over the entire length through the mast 1o and through it Bottom part down and is mechanically connected to the counterweight 25 there. There is a socket on the counterweight 25 27.1 is provided, which cooperates with a plug 3o and so a releasable electrical connection with a Power source 31 produces at the foot of the mast. As shown, the power source can be a short length of flexible cable have, which via lines and plug connections 31.1 with the switching device and the supply rail connected through which high voltage electric current

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for the lamp holder 26 is supplied.

An auxiliary socket 26.2 is attached to the holding frame 23, which are electrically connected to the distribution lines 26.1 is to facilitate the supply of electrical power to the lamp holders 26 when the holder is on the ground the mast has been lowered. This is because the plug 3o is pulled out of the socket 27.1 * This facilitates the upward movement of the counterweight and the power cable 27 when the holding frame is lowered.

Normally, the holding frame 23 is held up against the transverse support arms 15. A wobble of the The holding frame is prevented by projections 33 which are attached to support plates 34 welded to the holding frame 23 are and engage in base 32 which are provided on the support arms 15. The projections 2 33 lie during the normal upward movement of the holding frame 23 to the support arms 15 in the base 32, so that the holding frame and the lamp holders 26 in their normal position cannot wobble in relation to the mast 1o.

The counterweight 25 has an elongated, rigid sleeve 35, which consists of steel tube and is essentially filled with steel rods or steel rods, so that the counterweight 25 is heavier than the holding frame 23 together with the lamp holders 26 attached thereto. The steel sleeve 35 extends normally in a shaft 36 which is provided in the concrete base 13 of the mast 1o. The shaft 36 is closed at the bottom ₍ and open at the top so that the counterweight 25 can be slidably received in the shaft.

The counterweight also has a guide plate 37 with a mounting plate 38, both of which by means of

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Long bolt 38a on a cover plate 35 * 1 of the sleeve 35 are attached so that the mounting plate 38 with respect to the sleeve 35 is arranged rigidly. The mounting plate 38 has upwardly projecting eyelets to which the suspension cables 21 are anchored. The socket 27.1 is on the guide plate 37 and on the mounting plate 3ö attached so that the lower end of the power cord 27 is anchored.

The guide plate 37 has a pair of transversely outwardly projecting eyelets 37.1, which are firmly connected to the mounting plate and received guide cables 39 so that they can slide so that the counterweight 25 as a whole cannot rotate back and forth at a rapid pace during lifting and lowering. The guide _f; cables 39 are connected to the shaft 36 by means of fittings *, o near the pus of the mast. By means of fittings 41, the guide cables are attached to an upper, circular cover plate 4 2, which is welded to the top of the mast so that the guide cables 39 in the are essentially spatially fixed at all times.

Normally the counterweight holds the support frame 23 in its raised position. For lowering the holding frame 23 the counterweight in the mast 1o is raised by means of a lifting cable 43 which runs over a roller 44, which are in a covered housing 4 5 at the top of the Mastes 1o is provided. "

One end of the lifting cable 4 3 is by means of a fitting 43.1 on the mounting plate 38 of the counterweight 25, while the other end of the lifting cable in the embodiment shown around the drum 44a a v / inde 45a is wound from a holding plate 46 is worn. The holding plate 46 is fastened inside the mast 1o, for example welded on

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in the immediate vicinity of an access opening 47 » which is normally closed by a cover 48 ". The winch 45 a can be of any conventional design and can be detachably arranged inside the mast. In the exemplary embodiment shown, the winch 45a a gear housing 45.1, which mechanically for driving the winch via a portable, electrical auxiliary motor can be driven, the portable electric motor being brought to the application site by an operator and then temporarily connected to an input drive shaft 45.2 to drive the winch. A portable motor typically used for heavy-duty drilling can be used for this purpose. however, a special coupling is provided on the chuck.

It is clear that the hoist 43 is wrapped around the winch drum by actuating the winch 45a, whereby the counterweight is raised essentially over the entire height of the mast, so that the holder takes on η 2'5 on the egg lock beam 26 can be lowered.

The counterweight 25 has a number of heating wheels 2 49, which are screwed to the Bei'estigun ^ aplabte 3β by means of suitable brackets, so that the counterweight is freely guided along the inside of the upper portion of the mast, where the inside dimensions are considerable are smaller than the dimensions of the one shown in Ji'igur 7 Maat section so that the counterweight does not go along the inner surface of the mast is dragged.

In the modified embodiment shown in FIG it can be seen in principle that the holding frame 25 'shown there have a considerably different shape may than that shown in FIGS. 1, 2 and 3

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-1ο-

Holding frame. The holding frame 23 can carry, for example, fluorescent tubes 26 'as light sources, which are let into it. Furthermore, transparent cover plates 23a 'can be provided which carry advertising texts or the like. The hat 10 shown in FIG. 9 is essentially the same as that described above and has similar support arms at its tip for supporting and laying down the holding frame 23 ', so that the holding frame 23 ^f moves against the mast in a wobbling motion or in some other way is prevented, except when it is to be lowered. The holding frame 23 'has an opening 23b ¹ at the bottom so that it can move freely downwards along the mast when it is lowered.

In use, the holding frame 23 is normally held at the top of the mast Io. The counterweight 25 accommodated in the viewing shaft 36 holds the suspension cables 21 under tension so that the sockets 32 and the projections 33 are in engagement, whereby the holding frame and the lamp carrier are held in a stationary position against the haste. From the power cable 27, the lamp holder 26 will be supplied with power. The power cable 27 is supplied Ubar the outlet 27.1, the plug 3o and the flexible Kadei 31 with power, typically the cover 48 in befinaet detLn Figure 2 shown position, "./obei aer mast and the positioning Lampenvcn'ri as a smooth, one-piece Unit appear.

If, however, the lamp holders at the top of the tower are to be blown, the cover 48 is removed « A mechanical one engages on the drive shaft 45.2 of the winch Drive device on so that the counterweight can be lifted. The plug 3o is taken out of the socket 27.1 pulled out so that the power cable 27 is disconnected from the power source and the counterweight to the free Upward movement is being prepared.

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~ 11 -

When the winch 45a is operated, the lifting cable 43 is wound up on the drum 44a, the counterweight 25 being raised. When the counterweight sicii moves upwards in a hurry 1o, the cables 21 lower the holding frame 23 into the _{position shown in dashed lines in Fi t} air 1 and then to the base of the mast 1o, where the lamp holder 26 is easily accessible for replacement or for repair purposes are. When the ⁿ old frame and the lamp carriers move near the base of the tower, the lamp carriers 26 can be tested by supplying electrical power to the socket 26.2 on the holding frame.

When the lamp holder is finished, the Winch 45a operated in the reverse direction, whereby the lifting cable 43 unwound from the drum and the counterweight 25 is lowered in Hast 1o. As a result, the holding frame 23 is brought into the normal position of use, which is shown in Figures 1-2. ^ through the Guide cable 39, the counterweight is prevented from rotating rapidly. The transverse movement of the Haiteframe 23 during the upward movement is reduced to a minimum in that it is raised by three individual cables will and that, as soon as the holding frame opens the door 15 reached, the projections 33 exactly, in -.de socket 52 be performed, since the suspension cables 21 only a small, of the rollers 17 have depending length, As soon as the Projections 33 come into engagement with the base 32 are, the Halterahmeη against any transverse wobble or Oscillating movement held. As soon as the holding frame 23 is its has reached the top position and on the support arms 15 is applied in the manner shown, the power source is connected to the cable 27, in which the plug 3o in the socket 27.1 is plugged in. Then the mechanical drive device is removed from the winch 4 5a. The cover 4Ö is put on, whereby the light pole again

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is completely converted to its state of use.

The light mast, which can easily reach a height of 100 feet would normally be difficult to maintain as the operator b ^ w. the worker under great dangers would have to rescue the turn in order to reach the lamp holder. The invention, however, the Possibility created to lower the lamp holder to the ground for maintenance, so that such masts quickly and can be maintained without great expense. In addition, the sources of danger are switched off, which usually occur in the maintenance and repair of lighting towers. The counterweight in the shaft holds the holding frame against the rigid support arms. The suspension cables 21, which the holding frame with the counterweight connect, are not exposed to significant occlusion as they are never wound onto drums and are not exposed to external weather conditions. The power supply is included the distribution inside the holding frame. The power cable can be quickly and easily mechanically and electrically be uncoupled when the counterweight and aie suspension cable move up along the haste, whereby the Parking frame and the lamp mounts cut down for service purposes will. The lowering of the holding frame is done in a simple manner by lifting the counterweight, which is accomplished by means of the winch provided at the bottom of the mast.

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Claims (2)

Claims i Θ *
e: 1 # / support device for electrical installation supports elevated places, with a mast arranged on a base, at the top of which there are transverse support arms are provided, characterized in that the mast (1o) is tubular and hollow; that a holding frame (23) is provided at the top of the mast, which has electrical distribution lines (26.1); that at the top of the mast and at the arms hollen (17, 1b) are provided, over which the holding frame (23) hanging suspension cables (21) are guided; that a counterweight (25) suspended from the support cables (21) is provided near the base of the mast; that the Distribution lines (26.1) are supplied with power via a power cable (27), which is connected via a cable at the top the mast arranged roller (44) is guided; that the power cable is anchored to the counterweight; and that on A power source (31) that can be connected to the power cable is provided on the mast. 2. Trag ¥ device according to claim 1, characterized by a removable winch arranged on the butt of the mast (45a) with a lifting cable through which the suspension cables in the mast are raised to lower the holding frame can o 3. Carrying device according to claim 1 or 2, characterized by mutually engaging projections (33) and base (32) on the holding frame (23) and on the support arms (15), through which the holding frame against a transverse movement una against a wobbling movement at the top of the Mastes (io) is established. 109884/1020