JPS6244137B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floor support device for a vertical bus duct used as an electrical trunk.

A bus duct is constructed by sequentially connecting fixed-length units of 2 m to 5 m, and the conductor inside thereof expands and contracts repeatedly due to thermal expansion during energized use, restoring contraction when not in use, and changes in outside air temperature. Further, the duct housing that surrounds the conductor via an insulator also expands and contracts as the conductor's temperature changes and the outside temperature rises and falls. Therefore, when a bus duct is installed vertically, the load of the bus duct must be divided and supported on each floor surface, and the structure must be such that the vertical expansion and contraction of the bus duct itself can be distributed and absorbed by the supporting devices on each floor.

In addition, when a high-rise building shakes horizontally due to an earthquake, the period is short and the amplitude is small on the lower floors, and the period is longer and the amplitude is larger as you move up to the upper floors. Therefore, the vibrations transmitted from the building to the single upper and lower bus ducts supported on each floor surface differ from top to bottom, which tends to cause twisting stress on the bus ducts, which is undesirable, so it is necessary to alleviate and absorb this with the support devices on each floor. .

In order to address the above-mentioned problems, the present invention provides a safe bus duct that not only absorbs the vertical expansion and contraction of the bus duct itself and vibrations, but also absorbs vibrations caused by external vibrations of buildings such as earthquakes. The purpose is to obtain a floor support device.

Conventional floor support for a vertical bus duct involves passing the bus duct 3 through a through hole 2 provided in the floor 1 of each floor as shown in Figure 1, and using a support frame 4 such as a channel fixed to the floor 1 and a support fixed to the side of the bus duct 3. A vertical movement guide rod 6 is inserted through the plate 5, and the lower end of the guide rod 6 is inserted into the receiving frame 4.
For example, fix the support plate 5 with nuts 7 ₁ and 7 ₂ .
, a compression coil spring 8 provided with the guide rod 6 as an axis, and a spring receiver 9 attached to the guide rod 6.
The entire bus duct 3 is supported by a spring by being supported by the guide rod 6.

That is, the load of the vertical bus duct 3 is dividedly supported by the compression coil springs 8 on the floors of each floor, so that the load of the bus duct does not concentrate on the bus duct support portion of a specific floor.

Therefore, the vertical expansion and contraction of the bus duct 3 itself
Vibration can be dealt with by absorbing and relaxing the coil spring 8, but if the lateral vibration of the building due to an earthquake is transmitted to the bus duct 3 via the support frame 4, guide rod 6, and support plate 5, the amplitude of the building and bus duct will be reduced. In addition, as mentioned above, the different vibrations of the upper and lower floors of the building can cause complex vibration phenomena, and there is a risk that abnormal stress will be generated at the attachment part of the guide rod 6 to the receiving frame 4, causing the guide rod 6 to break. Also, the coil spring 8 is likely to buckle due to the above-mentioned lateral vibration.

The guide rod 6 is generally a long rod that is threaded along its entire length and then cut to a desired length. Therefore, when the bus duct 3 expands and contracts, the edge of the guide rod insertion hole of the support plate 5 gets caught on the screw of the guide rod 6, inhibiting the expansion and contraction of the bus duct 3, and the expansion and contraction effect of the coil spring 8 is not exerted. There are many. In particular, if the guide rod 6 is installed at an angle, or if it is tilted due to shaking due to an earthquake or the like, the above-mentioned problem may become serious and cause damage to the floor support device.

The present invention not only effectively absorbs the expansion/contraction and vertical vibration of the vertical bus duct 3 without inhibiting its expansion/contraction action, but also suppresses the lateral vibration of the bus duct 3 as much as possible to prevent buckling of the bus duct supporting coil spring 8. To provide a safe floor support device for a vertical bus duct capable of preventing stress concentration on a guide rod fixing part during side vibration.

That is, as shown in FIG. 2, the support plate 5 provided on the side surface of the vertical bus duct 3 is inserted through the vertical movement guide rod 6 through the sleeve 10, and the load of the vertical bus duct 3 is transferred between the support plate 5 and the vertical movement guide. It is received by the vertical movement guide rod 6 via an elastic member 8 provided between the rod 6 and the guide rod 6 is further supported by the fixed support frame 4 on the floor 1 through an elastic material block 11 whose tension can be adjusted. The load of the vertical bus duct 3 is reduced by providing a support mechanism on each floor of the building in which the width of the contact surface of the elastic material block 11 against the receiving frame 4 is at least several times larger than the cross-sectional area of the vertical movement guide rod 6. An elastic member 8 that is dividedly supported on the floor of each floor and directly receives the vertical load of the bus duct 3 of the support mechanism of each floor.
and an elastic material block 11 whose tension can be adjusted to receive the load of the vertical load receiving guide rod 6, making it possible to adjust functions such as load support, expansion/contraction, vibration absorption, etc. of the bus duct 3 for each floor. shall be.

In the embodiment shown in FIG. 2, the sleeve 10 is made to protrude above and below the guide rod insertion hole of the support plate 5 and is fixed to the support plate 5 by welding or other means. It may be fitted and fixed to the guide rod 6. The sleeve 10 allows its upper and lower end surfaces to be expanded.

A threaded rod is used for the guide rod 6, and a spring receiver 9 is attached thereto with a nut 13 so that it can be adjusted up and down. A compression coil spring is inserted between the spring receiver 9 and the support plate 5 as an elastic member 8, and a sleeve
Set it so that it fits on the outside of the Among the compression coil springs 8 on each floor, springs with play in their deflection do not share the load of the bus duct 3, so turn the nut 13 to tighten the spring 8.
Adjust so that there is no play by compressing.

As a result, the load of the bus duct 3 is dividedly supported through all the springs 8, and the springs 8 on each floor expand and contract following the expansion and contraction of the bus duct 3 when the power is on and when it is not in use, so that the load on the bus duct 3 is always balanced. Well divided and supported.

The elastic material block 11 supporting the guide rod 6 is made of a thick elastic rubber tube, and its diameter is set to several times the diameter of the guide rod 6.

Receiving plates 14, 1 are provided on both upper and lower surfaces of the elastic rubber tube 11.
5, and place the guide rod 6 on the upper receiving plate 14.
, screw the retaining nut 7 to the lower end of the guide rod 6 that protrudes downward through the hole in the receiving frame 4 , and tighten both nuts 12 and 7 to attach the elastic rubber tube 11 to the receiving frame 4 . The spring tension can be adjusted by adjusting the force.

The inner and outer diameters of the sleeve 10 in the device of the present invention are arbitrary as long as they are large enough to allow the guide rod 6 to be inserted and within the inner diameter of the coil spring 8, and the length is determined as appropriate.

As described above, the vertical bus duct floor support device of the present invention supports the vertical movement guide rod 6 of the vertical bus duct 3 on the fixed support frame 4 on the floor 1 via the elastic material block 11, and supports the vertical movement guide rod 6 perpendicularly to the vertical movement guide rod 6. bus duct 3
The weight of the vertical bus duct 3 itself is supported by the elastic member 8 provided between the support plate 5 provided on the side surface of the bus duct 3 and the vertical movement guide rod 6 inserted through the support plate. Vertical expansion and contraction and vibration are effectively supported and absorbed by the elastic member 8 and the elastic material block 11.

Since the width of the contact surface of the elastic material block 11 against the support frame 4 is made at least several times larger than the cross-sectional area of the guide rod 6, the lateral vibration transmitted from the building to the vertical bus duct 3 during an earthquake is suppressed by the support frame 4. It is absorbed and relaxed by the elastic material block 11 that is in close contact with the upper surface of the vertical movement guide rod 6 over a wide area, and there is no possibility of the vertical movement guide rod 6 breaking.

Furthermore, since the support plate 5 on the side surface of the vertical bus duct 3 is inserted through the vertical movement guide rod 6 through the sleeve 10, the vertical movement guide rod 6 is prevented from lateral vibration or twisting of the vertical bus duct 3 during an earthquake. The inclination of the guide rod 6 is suppressed by receiving the inclination by the support plate 5 and the sleeve 10, and the generation of stress at the joint portion between the guide rod 6 and the receiving frame 4 is further reduced. At the same time, buckling of the load-supporting elastic member 8 of the bus duct can be prevented, and the stability of the supporting action can be maintained.

By making the outer diameter of the sleeve 10 slightly smaller than the inner diameter of the elastic member 8 and keeping the elastic member 8 and the sleeve 10 in a fitted state, deflection of the elastic member 8 during an earthquake can be further suppressed. , damage to the vertical bus duct support device can be more effectively prevented.

When the vertical bus duct 3 expands and contracts, in the example shown in which the sleeve 10 is fixed to the support plate 5, the sleeve 10 moves up and down together with the support plate 5 around the guide rod 6, so that the vertical bus duct 3 The expansion and contraction of the bus duct is smooth, and the load of the bus duct 3 is effectively supported by the elastic member 8.

When the sleeve 10 is fitted onto the guide rod 6 and fixed to the rod 6, the support plate 5 slides up and down with the sleeve 10 as an axis as the vertical bus duct 3 expands and contracts. There is no interference between the hole edge of the support plate 5 and the expansion and contraction action of the bus duct 3.

Furthermore, the elastic tension of the elastic material block 11 can be adjusted by tightening the nut 12, so that by adjusting it according to the different swings and vertical loads of each floor in a high-rise building, the same structure of the support device can be attached to each support device. It can be applied to a hierarchy to provide a buffering force corresponding to each part of the hierarchy.

Although the above-mentioned functions combine to make the support device simple, it is an excellent device that absorbs and alleviates the vertical expansion and contraction of long vertical bus ducts installed in high-rise buildings and the lateral vibrations caused by earthquakes by dispersing them on each floor. It has a remarkable effect on its function.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional floor support device for a vertical bus duct, and FIG. 2 is a front view of the floor support device of the present invention. 1 is a floor, 2 is a hole through which the bus duct passes, 3 is a vertical bus duct, 4 is a receiving frame, 5 is a support plate, 6 is a vertical movement guide rod, 7, 12, 13 are nuts, 8 is an elastic member,
9 is a spring receiver, 10 is a sleeve, and 11 is an elastic material block.

Claims (1)

[Claims] 1. A support plate provided on the side surface of the vertical bus duct is inserted through a sleeve into the vertical movement guide rod, and the load of the vertical bus duct is caused to move vertically through an elastic member provided between the support plate and the vertical movement guide rod. The guide rod is supported by a fixed support frame on the floor via a tension-adjustable elastic block, and the width of the contact surface of the elastic block against the support frame is determined by the cross-sectional area of the vertically movable guide rod. A support mechanism that is at least several times larger than the above structure is installed on the floor of each floor of the building, and the load of the vertical bus duct is dividedly supported on the floor of each floor, and the support mechanism of each floor is made of an elastic member that directly receives the vertical load of the bus duct. A floor support device for a vertical bus duct in which functions such as load support, expansion/contraction and vibration absorption of the bus duct can be adjusted for each floor by means of a tension-adjustable elastic material block that receives the load of the vertical load receiving guide rod.