JP2006294477A - Lifting device of luminaire or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep a lifting object 2 nearly horizontal to stably lift and lower it by preventing twist or the like of suspension materials 3 due to vibration during movement of the lifting object 2 such as a luminaire 16 or the like. <P>SOLUTION: This lifting device of the luminaire 16 or the like is provided with: a lifting device body 1 mounted to a ceiling; the lifting object 2 having the luminaire 16 or the like; and the two suspension materials 3 for connecting the lifting device body 1 to the lifting object 2; and is so structured that the lifting device body 1 is equipped with: reeling drums 7 for reeling in the suspension materials 3; and a drive part for lifting and lowering the lifting object 2 through the suspension materials 3. The suspension materials 3 are formed of a metallic long strip-like material having a circular cross section; and the two suspension materials 3 are attached to the side of the lifting object 2 facing to them such that the same side surfaces of the inner side surfaces or the outer side surfaces thereof are faced to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lifting device such as a lighting fixture.

  In general, a lifting device for a lighting fixture is used to facilitate maintenance of the lighting fixture that is mounted on a high ceiling such as an atrium. This includes a lifting device body provided on the ceiling, a lifting body provided with a lighting fixture, etc., and a pair of suspension members for connecting the lifting device body and the lifting body, and a drive provided on the lifting device body. The lifting / lowering body is raised or lowered by winding or unwinding the suspension member by the portion.

  The drive part is mainly comprised from the winding drum to which the end of the said suspension material is generally connected, and the electric motor which rotates a winding drum in order to wind up a suspension material. With the lifting device having such a configuration, the lifting body is moved between the uppermost position near the ceiling where the lighting fixture is used and the lowermost position lowered to the workable position for maintenance of the lighting fixture. Is possible.

In this type of lifting device, generally, a pair of suspension materials for suspending the lifting body is a wire material such as a wire or a strip material.
JP 2003-317532 A JP 2002-104781 A

  In the lighting device lifting device as described above, the suspension material is twisted or the lifting body is turned over due to the bias of the center of gravity of the lighting device connected to the lifting body or the vibration during the movement of the lifting body. In some cases, the suspended material is damaged or the strength of the suspended material is lowered, which causes a problem that safety is greatly lowered. For this reason, conventionally, a protrusion or a wall for preventing the elevator body from being twisted or turned over has been required. In addition, it is necessary to provide a member that prevents the suspended material from rising in a twisted state when it is turned over.

  The present invention solves the above-mentioned problem, and by providing the suspension member with high rigidity, it is possible to prevent twisting of the suspension member due to vibration during movement of the elevator body, to keep the elevator body substantially horizontal, and to enable stable elevation. It is an object of the present invention to provide a safer lifting device such as a lighting fixture.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a lifting device main body provided on a ceiling, a lifting body provided with a lighting fixture and the like, and two suspension members for connecting the lifting device main body and the lifting body. The lifting device main body includes a winding drum that winds the suspension material and a drive unit that raises and lowers the lifting body via the suspension material. The material is composed of a long metal strip having an arcuate cross section, and the two suspension members are arranged on opposite sides of the lifting body so that the same inner side surface or outer side surface faces each other. It is characterized by being attached.

  The invention according to claim 2 is characterized in that a rib having a height corresponding to the degree of the curved surface of the suspension member is formed along the center of the outer peripheral surface of the winding drum.

  According to a third aspect of the present invention, the drive unit includes an electric motor that rotates the winding drum, and the electric motor is short-circuited between the terminals of the electric motor when the elevator is stopped.

  According to the first aspect of the present invention, the suspension member is made of a long strip made of metal having an arcuate cross section, and the metal strip having an arcuate cross section is thus unwound from the winding drum and straightened. In this state, there is a characteristic that the straight state is maintained as it is. Therefore, since it has rigidity in the state of being unwound from the winding drum and extended, that is, in the straight state when the lifting body is lowered, there is a force that twists and crosses the suspension material due to the vibration during the movement of the lifting body. Even if a force that works or the lifting body turns over is applied, the suspension material always tries to be in a straight state, so it is possible to effectively prevent deformation such as twisting and tipping, and the lifting body is always kept in a horizontal state. Can be held. In addition, since the two hanging members are arranged and attached so that the same side surfaces of the inner and outer surfaces face each other, the lifting and lowering is stabilized. Thereby, a lighting fixture etc. can be raised / lowered stably and safely.

  In addition, the suspension material has rigidity in a straight state, but also has the property of being easy to rotate in a spiral shape, and is easy to be wound around the winding drum. Volume can be kept small. Thus, since a thick wire cable or the like having high rigidity is not required, the lifting device main body can be made compact.

  According to the invention of claim 2, since the rib having a height corresponding to the degree of the curved surface of the suspension material is formed along the center of the outer peripheral surface of the winding drum, the winding is wound on the winding drum. The bent state of the suspension material is maintained in the state where it is applied.

  According to the invention which concerns on Claim 3, since the terminals of an electric motor are short-circuited at the time of a stop of a raising / lowering body, the free rotation of an electric motor is controlled and the stop state of a raising / lowering body can be hold | maintained stably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 is the side view of the raising / lowering apparatus of a lighting fixture, and the bottom view of the principal part, respectively. The lifting device includes a lifting device main body 1 provided on a ceiling, a lifting body 2 provided with a lighting fixture and the like, and a suspension member 3 connecting the lifting device main body 1 and the lifting body 2.

  The lifting device main body 1 is a structure of a building, for example, a base plate 5 directly attached to a fixture 14 fixed to the ceiling 4 is covered with a donut-shaped case 6 and the following parts are attached to the inside thereof. Thus, the base plate 5 is provided with a winding device and its drive unit. A winding drum 7 as a winding device and an electric motor 8 as a drive unit are provided in pairs. A cord reel 9 and a guide roller 10 are arranged on the base plate 5. Further, an ascending stop switch 11 and a descending stop switch 12 are provided. Reference numeral 13 denotes a remote control unit.

  The lift stop switch 11 is set so as to operate when it comes into contact with the lifting body 2 described below, and the drop stop switch 12 is operated by detecting that the suspension member 3 described later has been rewound to a predetermined length. It is set to be.

  Next, the lifting body 2 has a lighting fixture mounting bracket 15 disposed in the center of the lifting plate 18 and a lighting fixture 16 attached to the mounting bracket 15. A cushioning material is provided between the mounting bracket 15 and the lighting fixture 16. 17 is interposed.

  Further, the lifting device main body 1 and the lifting body 2 are connected via two suspension members 3. As shown in FIG. 3, the suspension member 3 is made of a long metal strip material such as steel. The cross section of each suspension member 3 is curved in an arc shape, one end of which is fixed to each winding drum 7 of the lifting device body 1 and the other end is fixed to the lifting plate 18 of the lifting body 2.

  The two suspension members 3 are attached to opposite sides so that the lifting body 2 can be balanced, and are arranged and fixed with their inner surfaces (or outer surfaces) facing each other. In addition, the position where the suspension member 3 is fixed to the lifting body 2 and the position of the winding drum 7 of the lifting apparatus main body 1 are arranged to correspond to each other.

  The suspension member 3 wound around the winding drum 7 is attached to the lifting plate 18 through the opening 20 formed in the case of the lifting device body 1. Similarly, the power cord 19 fed out from the cord reel 9 is also connected to a lighting fixture hooking ceiling 26 attached to the elevating plate 18 through the opening 20 of the case.

  The take-up drum 7 is pulled downward by the electric motor 8 in the rewinding direction and is moved upward by rotating the take-up drum 7 in the take-up direction. Therefore, the lifting body 2 suspended and fixed to the suspension member 3 can be raised or lowered.

  In addition, what is necessary is just to attach to the ceiling of the raising / lowering apparatus main body 1, or the attachment to the raising / lowering body 2 of the lighting fixture 16 by a well-known attachment means.

  In the above configuration, the lifting body 2 is normally in the position shown in the upper part of FIG. When the lighting fixture 16 breaks down or needs to be cleaned, the electric motor 8 may be operated by operating a remote controller (not shown). The two electric motors 8 are simultaneously operated in opposite directions, and the winding drums 7 connected to the two electric motors 8 are simultaneously rewound and rotated, so that the suspension member 3 is rewound and the elevating body 2 is lowered. And if it rewinds to predetermined length and the lighting fixture 16 fully falls, the descent | fall stop switch 12 will act | operate and the electric motor 8 will stop. Here, work such as repair, parts replacement, and cleaning may be performed.

  When the remote controller is operated again and the electric motor 8 is reversely rotated after the work is completed, the two electric motors 8 simultaneously operate in the winding direction opposite to that described above, and the winding drums 7 connected thereto are simultaneously rotated in the reverse direction. Since it is rotated, the suspension member 3 is wound up, and the elevating body 2 is raised. When the elevator plate 18 of the elevator body 2 is wound up to a predetermined position and hits the two lift stop switches 11 of the elevator apparatus body 1, the switches are turned on and the electric motor 8 stops. Of course, even if it is not the lower limit position, it can be stopped.

  As described above, the suspension member 3 is made of a long metal strip member having an arc-shaped cross section, and the metal strip member having the arc-shaped cross section is bent too much on the winding drum 7. Although there is a characteristic that when it is rewound and stretched, it bends and becomes straight, and maintains the straight state as it is. So it is difficult to deform. Therefore, since it has rigidity in the straight state when it is unwound from the winding drum 7 and the lifting body 2 is lowered, a force that twists and crosses the suspension member 3 due to vibration during the movement of the lifting body 2 is generated. Even if a force that works or the lifting body 2 is turned over is applied, the suspension member 3 always tries to be in a straight state. It can be held in a horizontal state. Further, since the two suspension members 3 are arranged and attached so that the same side surfaces of the inner and outer surfaces face each other, the lifting and lowering is stabilized. Thereby, stable and safe raising / lowering is attained.

  In addition, the suspension member 3 has rigidity in a straight state, but also has a property of being easy to rotate in a spiral shape, is easily wound around the winding drum 7, and has a strip shape, and thus is wound around the winding drum 7. Then the overall volume can be kept small. Thus, since the thick wire cable etc. with high rigidity are not required, the raising / lowering apparatus main body 1 can be made compact.

  As shown in FIG. 4, ribs 21 having a height corresponding to the degree of the curved surface of the suspension material 3 are provided along the center of the outer peripheral surface of the winding drum 7 (also the guide roller 25). Preferably formed. Thereby, the bending degree of the suspension material 3 is maintained for a long time. However, it is not necessary to provide ribs when the width of the suspension member 3 is narrow.

  Further, it is preferable that the terminals of the electric motor 8 are short-circuited and held when the elevating body 2 is stopped. An example of the control circuit in this case will be described with reference to FIGS.

  FIG. 5 shows the case where the electric motor 8 is controlled using three relays. When the stand-by or the lifting body 2 is stopped, as shown in FIG. Also, no voltage is applied. In this case, the relays R1, R2, and R3 are all in a non-operating state. At this time, the contacts R11 and R12 of the relay R1 are opened, the contacts R21 and R22 of the relay R2 are opened, and the electric motor 8 is the contact R31 of the relay R3. Shorted. Thereby, the free rotation of the electric motor 8 is restricted, and the stop state of the elevating body 2 can be stably maintained.

When raising the suspension member 3, a voltage is applied to the terminal common to the rise of the input terminal as shown in FIG. Since the relays R1 and R3 are in the operating state and the relay R2 is in the non-operating state, the contacts R11 and R12 of the relay R1 are closed, the contacts R21 and R22 of the relay R2 are opened, and the contact R31 of the relay R3 releases the motor short circuit. Therefore, the drive current of the motor flows from the + terminal of the rectifier circuit to the-terminal via the contact R11, the contact R31, the electric motor 8, and the contact R12, so that the electric motor 8 can be rotated in the winding direction of the suspension material 3. When the material 3 is lowered, a voltage is applied to the terminal common to the lowering of the input terminal as shown in FIG. Since the relays R2 and R3 are in the operating state and the relay R1 is in the non-operating state, the contacts R11 and R12 of the relay R1 are opened, the contacts R21 and R22 of the relay R2 are closed, and the contact R31 of the relay R3 is a short circuit of the electric motor 8. Since the drive current of the electric motor 8 flows from the positive terminal of the rectifier circuit to the negative terminal of the rectifier circuit via the contact R21, the electric motor 8, the contact R31, and the contact R22, the electric motor 8 is rewound by the suspension material 3 Can be rotated in the direction.

  FIG. 6 shows the case where the motor is controlled using two relays. When the motor is on standby or when the lifting body 2 is stopped, the input terminal is either raised or lowered as shown in FIG. No voltage is applied. Since the relays R1 and R2 are all inactive, the contact R11 of the relay R1 is open, the contact R12 is closed, the contact R21 of the relay R2 is opened, and the contact R22 is closed. The electric motor 8 is short-circuited at the contact R12 and the contact R22.

  When the suspension member 3 is raised, a voltage is applied to the common terminal with the rise of the input terminal as shown in FIG. Since the relay R1 is in the operating state and the relay R2 is in the non-operating state, the contact R11 of the relay R1 and the contact R22 of the relay R2 are closed, and the contact R12 of the relay R1 and the contact R21 of the relay R2 are opened. Therefore, the motor drive current flows from the + terminal of the rectifier circuit to the-terminal via the contact R11, the electric motor 8, and the contact R22, and the electric motor 8 can be rotated in the direction of winding the hoisting material 3.

  When the suspension member 3 is lowered, a voltage is applied to the terminal common to the lowering of the input terminal as shown in FIG. Since relay R1 is inactive and relay R2 is active, contact R12 of relay R1 and contact R21 of relay R2 are closed, and contact R11 of relay R1 and contact R22 of relay R2 are open. Therefore, the motor drive current flows from the positive terminal of the rectifier circuit to the negative terminal via the contact R21, the electric motor 8, and the contact R12, and the electric motor 8 can be rotated in the rewinding direction of the suspension member 3. . The contact configuration of the relays R1 and R2 may be reversed in the open / closed state. In this case, the rotation direction is opposite to the above direction.

  Next, the suspension member 3 in the lifting device main body 1 is not necessarily limited to the example driven by the two electric motors 8. One may be sufficient. When the suspension member 3 is operated by one electric motor 8, for example, as shown in FIGS. 7 and 8, an even number (here, six) of one electric motor 8 and two winding drums 7 are provided. And the transmission gear 23 and the coupling 24. According to this, when the electric motor 8 operates, the six transmission gears 23 rotate. Among these transmission gears 23, the transmission gears 23 at both ends rotate at the same speed in the opposite direction at the same time, so that the winding drums 7 connected to the transmission gears 23 at both ends also rotate in the same manner. Therefore, the winding drum 7 also rotates in the opposite direction depending on the rotation direction of the electric motor 8, and the suspension member 3 can be moved in the descending or ascending direction.

  Further, as shown in FIGS. 9 and 10, the interval between the winding drums 7 is reduced, and the four transmission gears 23 are operatively connected. The suspension member 3 is passed from the winding drum 7 through the guide roller 25. It is good also as a structure dropped down.

  In addition, the transmission of power from the electric motor 8 is not limited to gears. The structure which connects the output shaft of an electric motor and a winding drum via a timing belt may be sufficient.

  As mentioned above, by providing the suspension material with high rigidity, it is possible to prevent twisting of the suspension material due to vibration during movement of the lifting body, to keep the lifting body substantially horizontal, and to enable stable lifting and lowering. It is an object of the present invention to provide a simple lifting device.

  In addition, the power supply connection to a lighting fixture may be a connection by a contact between the lifting device main body and the lifting body instead of the cord reel. The electric motor is a DC electric motor, and a geared motor with a reduction gear is preferable.

  The present invention can be applied not only to lighting fixtures but also to raising and lowering other fixtures and devices that need to be raised or lowered.

It is a side view of the raising / lowering device of the lighting fixture which concerns on this invention. It is a bottom view of the principal part of the said raising / lowering apparatus. It is a perspective view of a part of suspension material. It is a side view of a winding drum (or guide roller). (A) (b) (c) is an example of a circuit diagram of an electric motor. (A) (b) (c) is an example of other circuit diagrams of an electric motor. It is a side view of the raising / lowering apparatus of another lighting fixture. It is a bottom view of the principal part of the said raising / lowering apparatus. It is a side view of the raising / lowering apparatus of another lighting fixture. It is a bottom view of the principal part of the said raising / lowering apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting device main body 2 Lifting body 3 Hanging material 7 Winding drum 16 Lighting fixture

Claims (3)

A lifting device main body provided in a building structure, a lifting body provided with a lighting fixture, and two suspension members connecting the lifting device main body and the lifting body, In a lifting device such as a lighting fixture provided with a winding drum that winds up a suspension material and a drive unit that raises and lowers the lifting body via the suspension material,
The suspension member is made of a long metal strip having an arcuate cross section, and the two suspension members are opposed to each other on the opposite side of the lifting body so that the same inner side surface or outer side surface faces each other. A lifting device such as a lighting fixture, which is arranged and attached.   The lifting device for a lighting apparatus or the like according to claim 1, wherein a rib having a height corresponding to a degree of the curved surface of the suspension member is formed along the center of the outer peripheral surface of the winding drum. The lighting device according to claim 1, wherein the driving unit includes a DC electric motor that rotates the winding drum, and holds and shorts terminals of the electric motor when the lifting body is stopped. Elevating device such as.

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