JPS5926822B2 - Vertical bus duct floor support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floor support device for a vertical bus duct used as a non-electric main line.

A bathtub is constructed by sequentially connecting fixed-length units of 2 m to 5 TTL, and its internal conductor expands and contracts repeatedly due to thermal expansion during energized use, restoration contraction when not in use, and changes in outside air temperature.

Further, the duct housing that surrounds the conductor via an insulator also contracts as the temperature of the conductor changes and the outside temperature increases or decreases.

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 shrinkage 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 in the lower floors, and the period is longer and the amplitude is thicker in the upper floors.

Therefore, the vibrations transmitted from the building to the upper and lower bus ducts supported on each floor surface tend to cause twisting stress on the upper tools and the bus ducts, which is undesirable, so it is necessary to alleviate and absorb this with the support equipment on each floor. .

In order to solve the above-mentioned problems, the present invention has developed a safe system that not only absorbs the vertical contraction and vibration of the bus duct itself (but also absorbs vibrations caused by external vibrations of the building such as earthquakes). Aiming to obtain a floor support device for a bus duct - 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.
A vertical movement guide rod 6 is inserted through a support frame 4 such as a channel fixed to the support frame 4 and a support arm 5 fixed to the side surface of the bus duct 3, and the lower end of the guide rod 6 is fixed to the support frame 4 with nuts 7□, 7□, for example. The supporting arm 5 is supported on the guide rod 6 by a coil spring 8 and a spring receiver 9 attached to the guide rod 6.

Therefore, the contraction and vibration of the bus duct 3 itself in the vertical direction can be dealt with by absorbing and relaxing the coil spring 8.
When 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 arm 5, the amplitude of the building and the bus duct are different, and as mentioned above, due to different vibrations in the upper and lower floors of the building, etc. A complicated vibration phenomenon occurs, and abnormal stress is generated at the attachment part of the guide rod 6 to the support frame 4, causing the guide rod 6 to
There is a risk of it breaking.

The present invention provides a safe floor support device for a vertical bus duct that can not only absorb the expansion/contraction and vertical vibrations of the vertical bus duct 1, but also prevent stress concentration on the guide rod fixing portion when the vertical bus duct 1 is shaken sideways. , the load of the vertical bus duct 3 is received by the vertical guide rod 6 via an elastic member 8 whose tension can be adjusted, and the guide rod 6 is supported by a fixed support frame 4 on the floor 1 via an elastic material block 10 whose tension can be adjusted. The vertical bus duct 3 is divided by providing a support mechanism on each floor of the building so that the width of the contact surface of the elastic material block 10 against the receiving frame 4 is at least several times thicker than the cross-sectional area of the guide rod 6. support,
The vertical load-receiving elastic member 8 of the bus duct of the support mechanism of each floor and the elastic member block 100 that receives the load of the vertical load-receiving guide rod 6 adjust the elastic tension and provide bus duct load support and contraction/vibration absorption functions to each floor. This is a floor support device for vertical bus ducts, which is characterized by being adjustable.

In the embodiment shown in FIG. 2, the guide rod 6 is a threaded rod, and a spring holder 9 is attached to this with a nut 12 so as to be adjustable up and down, and a coil spring is installed as an elastic member 8 between the spring holder 9 and the support arm 5. This is an example in which the tension of the spring 8 is adjusted using the nut 12.

In this case, an elastic member such as rubber may be provided above or below the spring 8, or both.

Then, a cylindrical portion is formed integrally with the upper and lower rubber elastic members,
The upper and lower cylindrical portions may face each other and fit inside and outside to surround and protect the coil spring 8.

The elastic material block supporting the guide rod 6 is an elastic rubber tube 10 whose diameter is several times the diameter of the guide rod 6.

Block receiving plates 13 and 14 are placed on both the upper and lower surfaces of the rubber cylinder 10, and the nut 11 is screwed onto the screw guide rod 6 on the upper receiving plate 13, passing through the hole in the receiving frame 4 and protruding downward. A retaining nut 7 is screwed onto the guide rod, and both nuts 7 and 11 are used to attach the elastic block 10 to the receiving frame 4 so that the spring tension can be adjusted by adjusting the pressure force.

In the present invention, as described above, the guide rod 6 is supported by the support frame 4 on the floor via the elastic block 10, and the vertical bus duct 3 is supported on the guide rod 6 by the elastic member 8, so that the weight of the vertical bus duct itself is reduced. Vertical expansion and contraction and vibration are carried out by the elastic member 8.
and is effectively absorbed by the elastic material block 10.

In addition, during an earthquake, the material yellow vibration transmitted from the building to the bus duct is transmitted to the guide rod 6 via the elastic material block 10 that is in close contact with the support frame 4 on a wide surface, so the surveying lateral vibration energy is absorbed and relaxed by the elastic material block 10. be done.

Therefore, the risk of breakage of the guide rod 6 is eliminated.

Furthermore, the elastic tension of the elastic member 8 and the elastic material block 10 can be adjusted by tightening the nuts, so by adjusting it according to the different swings and vertical loads of each floor in the ultrasonic building, it is possible to support the same configuration. The device can be applied to each level to provide a corresponding buffering force to each level.

Although it is a simple support device in combination with the above effects,
It has the remarkable effect of exerting an excellent function of absorbing and mitigating horizontal vibrations caused by earthquakes and the vertical expansion and contraction of long vertical bus ducts installed in high-rise buildings in a distributed manner on each floor.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional vertical bus duct floor support device;
FIG. 2 is a front view of the floor support device of the present invention. 1 is the floor, 2 is the hole through which the bus duct passes, 3 is the vertical bus duct, 4 is the receiving frame, 5 is the support arm, 6 is the guide rod, 7, lL12 is the nut, 8 is the coil spring, 9 is the spring holder, 1
0 is an elastic material block.

Claims (1)

[Claims] 1. The load of the vertical bus duct is received by the upper and lower guide rods via the tension-adjustable elastic members, and the guide rods are supported by a fixed support frame on the floor via the tension-adjustable elastic material blocks, and the load of the elastic material blocks is The load of the vertical bus duct can be divided and supported by installing a supporting mechanism on each floor of the building with a width of the contact surface against the receiving frame that is several times larger than the cross-sectional area of the guide rod. The elastic tension of the elastic member that receives the vertical load of the bus duct of the support mechanism and the elastic member block that receives the load of the vertical load receiving guide rod is adjusted, and functions such as load support of the bus duct and absorption of contraction and vibration are achieved for each floor. Adjustable floor support for vertical bath ducts I.