JPH07137992A - Suspending structure for suspended device - Google Patents

Abstract

PURPOSE:To provide the suspending structure of a suspended device with which a suspended article is not swung and, even if it is swung, damped readily, without using a special device. CONSTITUTION:A suspending point O capable of suspending a suspended device 10 horizontally is set up. Also two wires 12 inclined in the directions different by the same angle of theta relative to a vertical line L passing through the suspending point O are connected to the suspending point O, and the upper end of the wires 12 is connected to the upper fixing member such as a ceiling, etc. Then the suspended device 10 is suspended with the vertical component forces V of the tensions W of the two wires 12 for each suspending point O, and the horizontal component forces H of the tensions W of the two wires 12 pull the suspending point O with the same force in the directions opposite to each other. Thus, even if the suspended device 10 is lifted up and down by lifting and lowering the wires 12 or by the external forces such as wind force, earthquake, etc., the suspended device 10 is not swung in horizontal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging structure for hanging objects.

[0002]

2. Description of the Related Art Usually, a suspended object such as a lighting fixture is suspended by a suspension member such as a wire or a chain suspended vertically from a ceiling.

This hanging object is wound up and down with a wire or the like to be lifted up and down. However, in a vertically hanging structure, the hanging object looks like a pendulum due to rising or lowering or due to wind force or seismic force. Keep shaking for a long time.

For this reason, there is a method of connecting a tiger wire to the hanging object separately from the wire for hanging in a diagonally horizontal direction to suppress the shaking of the hanging object. However, when the hanging object is moved up and down or moved in the horizontal direction. It is very troublesome to attach and detach the trawler each time.

As a method of forcibly damping the swinging of the suspended object, there is also a method of moving the suspension source of the wire fixed to the ceiling in the same direction as the suspension point swinging direction.

However, in this method, when shaking occurs, the relative position between the hanging point of the hanging object and the hanging origin is detected, the distance, direction, and time for moving the hanging origin are instantly calculated, and the hanging is carried out promptly. The original must be moved. Therefore, a high-performance and complicated device such as a sensor for detecting the relative position, a computer for performing calculation at high speed, and a drive device for moving the suspension base quickly is required.

[0007]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention provides a hanging structure for a hanging object which does not shake and which can immediately dampen the shaking without using a special device. The purpose is to provide.

[0008]

A suspending structure for a suspended object according to claim 1, wherein at least three suspending points capable of suspending the suspended object in a horizontal state are set, and a vertical line passing through the suspending point is set. It is characterized in that each suspension point is suspended by two suspension members inclined in different directions by the same angle.

The hanging structure according to a second aspect of the invention is characterized in that a pulley is arranged at a base of the hanging member so that the hanging member can be rolled up and down.

According to a third aspect of the present invention, there is provided a suspending structure for suspending a suspended object, wherein a suspending point capable of suspending the suspending object in a horizontal state is set, and a movable pulley is arranged at the suspending point to form a vertical line passing through the suspending point. It is characterized in that one hanging member is wrapped around a moving pulley so as to incline and a hanging object is hung.

According to a fourth aspect of the present invention, in the hanging structure for suspending a hanging object, at least one of the ends of the hanging member wound around the moving pulley is hoisted through a pulley arranged at the hanging base of the hanging member. The feature is that it can be lowered.

[0012]

In the hanging structure according to the first aspect of the invention, the hanging point is set so that the hanging object can be hung horizontally. The number of hanging points must be at least three, which form a surface with the hanging points.

Two hanging members which are inclined at the same angle in different directions with respect to a vertical line passing through the hanging points are connected to the hanging points, and the upper ends of the hanging members are such as ceilings. It is connected to the upper fixing member.

That is, the suspended object is suspended by the vertical component force of the axial force of the two suspension members at each suspension point, and the horizontal component force of the axial force of the two suspension members is determined by the suspension point. Pull in opposite directions with the same force.

Therefore, the hanging object does not horizontally swing even by an external force such as wind force or seismic force. Also, even if an excessive external force acts on the hanging object and the hanging member temporarily plays, when the external force disappears, the horizontal component force that tries to return to the original position works, and the time for damping the shaking is remarkable. It gets shorter.

In the hanging structure of the hanging object according to claim 2,
Even if the pulley is placed at the hanging base and the hanging member is rolled up and down and the hanging object is moved up and down, the horizontal component force of the axial force of the two hanging members is the same in opposite directions at the hanging points. The suspension does not swing horizontally because they are pulled by force.

In the hanging structure of the hanging object according to claim 3,
A moving pulley is placed at the hanging point of the hanging object. This moving pulley is designed to be inclined with respect to the vertical line passing through the suspension point.
A hanging member of a book is wrapped around and a hanging object is hung via a moving pulley.

Therefore, when the hanging object swings in the horizontal direction, the moving pulley rotates to try to equalize the left and right hanging angles of the hanging member with respect to the vertical line passing through the hanging point. Friction resistance occurs at the bearing. This consumes energy to rotate the moving pulley,
As a result, the energy for swinging the hanging object in the horizontal direction is reduced, and the hanging object is less likely to shake.

The frictional resistance at the bearing of the moving pulley is
It can be adjusted by changing the hanging angle of the hanging member, or the frictional resistance force at the bearing portion may be directly adjusted.

In the hanging structure of the hanging object according to claim 4,
At least one of the ends of the suspension member wound around the moving pulley is adapted to be wound up and down via a pulley arranged at the suspension base.

As a result, although the suspended object moves up and down, the moving pulley rotates in the direction of returning to the original position, and the time during which the swing of the suspended object during the elevating operation is damped is significantly shortened.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a disk-shaped suspended object 10 suspended by the suspended object suspension structure according to the first embodiment. The disc-shaped hanging object 10 is used because the balance state can be easily explained, and the shape of the hanging object is not limited.

In the vicinity of the outer periphery of the hanging object 10, the hanging object 10
Eight suspension points O are set at equal intervals on the circumference around the center of gravity so that can be suspended in a horizontal state. This hanging point O
The lower ends of the two wires 12 are fixed to.

The two wires 12 are inclined with respect to the vertical line L passing through the suspension point O in directions different from each other by a suspension angle θ. Further, as shown in FIG. 2, the upper end of the wire 12 is wound around the sheave 14 and is wound up and down by a winch (not shown).

The bracket 16 of the sheave 14 is connected to the hanging bracket 18 by a pin 21, and the sheave 14 is rotatable around the pin 21. As a result, the wire 12 can be smoothly wound up and down even if the hanging object 10 moves up and down and the hanging angle θ changes. The bracket 18 is connected to a socket 20, and the socket 20 is pivotally supported by a shaft 26 that penetrates a fixing plate 24 extending from the ceiling portion 22.

The sheave 14 does not necessarily have to be attached in the above-mentioned configuration, and the bracket 18 may be directly fixed to the ceiling 22.

Next, the operation of the hanging structure of the hanging object according to the present embodiment will be described. The hanging object 10 hung by a total of 16 wires 12 can be raised and lowered in the horizontal direction without shaking by winding the wires 12 at the same time with a winch and lowering them.

This is because, as shown in FIG. 1, the tensile force W of the wire 12 is divided into a vertical force V of 2WCOSθ and a horizontal force H of WSINθ that pulls in opposite directions at each suspension point O. Because it is done. Due to this horizontal force H, the hanging object 10 is pulled from all directions by the same force, and is not shaken by an external force such as an earthquake force or a wind force.

Further, an excessive external force acts on the hanging object 10,
Even if a play is temporarily generated in the wire 12, when the external force disappears, the horizontal force H that tries to return to the original position acts, and the time for damping the shake is significantly shortened. Furthermore, at the time of returning to the original position, a force that prevents displacement of the hanging object 10 is generated, and it becomes difficult for the hanging object 10 to shake.

In this embodiment, the case where there are eight hanging points O has been described, but the number of hanging points may be three or more. In addition, it is possible to halve the number of wires by disposing a pulley at the suspension point and winding the wires around the pulley. Furthermore, in the present embodiment, the case where the hanging member is a wire has been described, but if a force such as a cylinder is used as the hanging member and a lifting object is directly moved up and down, a winch is arranged in the ceiling portion. There is no need. Also, the circle connecting the hanging points and the circle connecting the hanging elements in the plane have the same diameter, but the hanging elements are offset outward so as to expand the circle connecting the hanging elements,
The hanging object may be hung diagonally outward.

Next, the hanging structure of the hanging object according to the second embodiment will be described. As shown in FIG. 3, in the second embodiment, the movable pulley 32 is arranged at the suspension point O set so that the suspended object 30 can be suspended horizontally. The wire 12 is wound around the movable pulley 32, and the hanging object 30 is hung through the movable pulley 32.

One end of the wire 12 is fixed to the ceiling portion 22 and the other end is wound around a fixed pulley 34 arranged on the ceiling portion 22. The wire 12 is tilted at a suspension angle θ with respect to a vertical line L passing through the suspension point O so that the ceiling 2
It is fixed to 2 and is wound around a fixed pulley 34.

The wire 12 can be wound up and down by a winch (not shown).

Next, the operation of the hanging structure of the hanging object according to the present embodiment will be described. The suspended object 30 suspended via the movable pulley 32 is moved up and down by winding up and down the wire 12 with a winch.

Here, the case where the force for swinging the hanging object 30 is small and the case where it is large will be described separately.

When a small horizontal force acts on the suspended object 30, the moving pulley 32 tries to rotate and keep its original position due to its function, but the horizontal force for rotating the moving pulley 32 does not move. When it is smaller than the static frictional resistance force generated in the bearing portion of the pulley 32, the suspended object 30 does not shake.

On the other hand, when a large horizontal force is applied to the hanging object 30, the hanging object 30 swings greatly as shown by the broken line in FIG. 3, and thereafter, the vertical line L and the wire 12 passing through the hanging point O. Try to equalize the left and right suspension angles θ drawn by
The movable pulley 32 rotates and tries to return to the original position.

Here, supplementing the mechanical explanation, the frictional resistance force generated in the bearing portion of the moving pulley 32 is proportional to the amount of rotation of the moving pulley 32. The force in the opposite direction to the force that tries to shake the object is increased, and the shaking of the hanging object 30 can be suppressed to the minimum.

That is, when the frictional resistance force generated in the bearing portion increases, the shaking energy decreases accordingly, and the damping time of the shaking shortens.

As described above, the reduction efficiency of the swing energy and the shortening of the swing decay time are achieved by the vertical line L passing through the suspension point O.
And the hanging angle θ drawn by the wire 12.

This is because the graph shown in FIG. 4 shows the case where the hanging angle θ is θ = 0 ° (the case where the object is hung vertically without an angle) and the graph shown in FIG. 5 shows the hanging angle. θ to θ
As can be determined by comparing with the case where the angle is set to 15 ° (the case where the moving pulley 32 is hung with an angle), the damping time of the swing becomes significantly shorter when the moving pulley 32 is hung with an angle.

Therefore, in order to suppress the swing of the hanging object 30, it is preferable to increase the hanging angle θ as much as possible to increase the frictional resistance force generated in the bearing portion. Since it will be necessary to increase the ability of the above, it is desirable to select the timely. In addition, since the interval of the suspension origin is widened by setting the suspension angle θ, it is necessary to consider the size of the ceiling portion 22. Therefore, in order to exert a large damping effect, the moving pulley 3
It is preferable to employ a mechanism capable of mechanically changing the frictional resistance force at the bearing portion 2 as required.

In the above embodiment, for the sake of convenience, the case of damping the sway in one direction has been described. However, as shown in FIG. 6, two horizontal directions (directions in which the shaft portions of the moving pulley 32 are orthogonal).
By arranging the movable pulley 32 at, it is possible to damp the swing of the hanging object 30 in two horizontal directions. Further, as shown in FIG. 7, if the movable pulley 32 is arranged in three horizontal directions (the extension line of the shaft portion of the movable pulley 32 draws an equilateral triangle), not only the horizontal swing of the suspended object 30 but also the suspension of the suspended object 30 can be prevented. The rotation of the object 30 can be restricted.

Furthermore, the set number of movable pulleys 32 is the same as the number of hanging objects 3.
It is necessary to determine the weight of 0 in consideration.

Further, in the above-mentioned embodiment, the wire and the pulley constitute the suspension structure. However, the member to be used is not limited as long as it is a bendable wire material such as a belt or a rope instead of the wire. It is also possible to use sheaves, gears or the like instead of the above.

Further, as shown in FIG.
Instead of directly winding the wire 12 wound on the winch with a winch, the wire 12 may be wound via a pulley 35 having an axis intersecting the fixed pulley 34 at a right angle.

[0047]

EFFECTS OF THE INVENTION Since the present invention has the above-described structure, the hanging object is not exposed to the vibration without using a special device, and the vibration can be immediately attenuated even if the vibration is caused.

[Brief description of drawings]

FIG. 1 is a schematic view of a hanging structure of a hanging object according to a first embodiment.

FIG. 2 is a perspective view showing a suspending source of a suspending structure of a suspended object according to the first embodiment.

FIG. 3 is a schematic view of a main part of a hanging structure for hanging objects according to a second embodiment.

FIG. 4 is a graph showing the decay time of the amplitude when the hanging angle is 0 ° in the hanging structure of the hanging object according to the second example.

FIG. 5 is a graph showing the decay time of the amplitude when the hanging angle is 25 ° in the hanging structure according to the second embodiment.

FIG. 6 is a view showing a suspending structure for a suspended object according to the second embodiment.
It is a conceptual diagram which showed the mechanism which suppresses the shake of a direction.

FIG. 7 is a diagram illustrating a structure for suspending a suspended object according to the second embodiment.
It is a conceptual diagram which showed the mechanism which suppresses the shake of a direction.

FIG. 8 is a perspective view showing a hanging source of another hanging structure of a hanging object.

[Explanation of symbols]

 O Suspended point 10 Suspended object 12 Wire (suspended member) 14 Sheave 30 Suspended object 32 Moving pulley 34 Fixed pulley

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kozo Fukao 1-5 Otsuka, Inzai-cho, Inba-gun, Chiba Incorporated Takenaka Corporation Technical Research Institute (72) Inventor Yoshihiro Yabushita 4-chome Honmachi, Chuo-ku, Osaka-shi, Osaka 1-13 Takenaka Corporation Osaka Main Store (72) Inventor Hisao Mukai 4-1-1 Hommachi, Chuo-ku, Osaka City, Osaka Prefecture Takenaka Corporation Osaka Main Store (72) Inventor Tatsuichi Nakama Osaka 4-13 Honmachi, Chuo-ku, Osaka City, Osaka Prefecture Takenaka Corporation, Osaka Main Store (72) Inventor Hisato Okude 4-1-1, Honmachi, Chuo-ku, Osaka City, Osaka Prefecture Takenaka Corporation Osaka Main Store

Claims (4)

[Claims] 1. At least three suspension points capable of suspending a suspended object in a horizontal state are set, and each suspension is made up of two suspension members that are inclined in different directions by the same angle with respect to a vertical line passing through the suspension points. A hanging structure for hanging objects characterized by hanging points. 2. The hanging structure according to claim 1, wherein a pulley is arranged at a base of the hanging member so that the hanging member can be rolled up and rolled down. 3. A suspending member capable of suspending a suspended object in a horizontal state is set, a moving pulley is arranged at the suspending point, and one suspending member is tilted with respect to a vertical line passing through the suspending point. A hanging structure for hanging a hanging object around a moving pulley. 4. At least one of the ends of the suspension member wound around the moving pulley can be hoisted and unwound via a pulley arranged at the suspension base of the suspension member. Item 3. A hanging structure for a hanging object according to Item 3.