JP3726288B2 - Elevating lighting fixture - Google Patents

Elevating lighting fixture Download PDF

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Publication number
JP3726288B2
JP3726288B2 JP00075894A JP75894A JP3726288B2 JP 3726288 B2 JP3726288 B2 JP 3726288B2 JP 00075894 A JP00075894 A JP 00075894A JP 75894 A JP75894 A JP 75894A JP 3726288 B2 JP3726288 B2 JP 3726288B2
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JP
Japan
Prior art keywords
lighting fixture
power cord
winding
lifting
wires
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Expired - Lifetime
Application number
JP00075894A
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Japanese (ja)
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JPH07211127A (en
Inventor
宏樹 中尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP00075894A priority Critical patent/JP3726288B2/en
Publication of JPH07211127A publication Critical patent/JPH07211127A/en
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Description

【０００１】
【産業上の利用分野】
この発明は、昇降式照明器具に関するものである。
【０００２】
【従来の技術】
第１の従来例を図３に示す。すなわち、この昇降式照明器具は、昇降装置５０と、この昇降装置５０に吊持されて昇降する照明器具５１とを備え、昇降装置５０および照明器具５１の昇降部５２の対向面に接点５３，５４を設け、照明器具５１が上昇したときに接点５３，５４が相接触して照明器具５１に電力が供給されるようにしている。
【０００３】
第２の従来例を図４に示す。すなわち、この昇降式照明器具は、ばね力昇降装置５５と、このばね力昇降装置５５に吊持されて昇降する照明器具５６とを備え、ばね力昇降装置５５のワイヤ５７にカールコード５８を巻付て照明器具５６に接続している。５９はフランジである。
第３の従来例として、例えば昇降装置と、この昇降装置に吊持されて昇降する照明器具とを備え、昇降装置に設置したコードリールから電源コードを繰り出して照明器具に接続したものがあった。
【０００４】
【発明が解決しようとする課題】
しかし、第１の従来例は、照明器具５１が下降位置では点灯できない欠点があった。
第２の従来例は、照明器具５６が下降位置で点灯できるが、照明器具５６を上昇したときにカールコード５８がたるみやすく外観が悪くなる欠点があった。
【０００５】
第３の従来例は、コードリールに電源コードの巻取りを規制するストッパがあり、電源コードの弛みをとるためにストッパを解除する必要があった。
したがって、この発明の目的は、照明器具の昇降時に常に電源コードをたるみなく張ることができ、しかもモータに加わる荷重の変動を抑制することができる昇降式照明器具を提供することである。
【０００６】
【課題を解決するための手段】
この発明の昇降式照明器具は、一対のワイヤを繰り出しまたは巻き取りする昇降装置と、この昇降装置より垂下した前記一対のワイヤに両端部が取付けられて前記昇降装置の動作により昇降する照明器具と、前記昇降装置に設けられて前記照明器具の前記一対のワイヤ間の中間位置に一端が接続された電源コードの他端側を常時引っ張るように巻き取るばねを有する巻取装置とを備え、
前記巻取装置の巻き込み力が前記一対のワイヤと前記電源コードの繰り出し部分の重量に等しくなるように設定したことを特徴とするものである。
【０００７】
【作用】
この発明の構成によれば、昇降装置の動作により照明器具が昇降する。また照明器具の昇降に応じて電源コードが巻取装置から繰り出されたり巻き取られるが、巻取装置の巻き込み力を電源コードの繰り出し部分の重量に相当する力に設定しているため、電源コードの繰り出し部分の重量が荷重としてモータに加わらず荷重の変動を抑制できるため、モータトルクが安定し照明器具の昇降速度が安定する。しかも電源コードは巻取装置により常にたるみなく張っているため、外観がよい。さらに電源コードが直線であるためカールコードと比較して掃除がしやすく、巻き上げに際して電源コードがからまない。またコード切れまたはワイヤ切れが生じても他方は切れていないため照明器具の落下の危険を防止することができる。
【０００８】
【実施例】
この発明の一実施例を図１および図２により説明する。すなわち、この昇降式照明器具は、昇降装置１と、照明器具２と、巻取装置３とを有する。
昇降装置１は、モータ（図示せず）に接続されたドラム４と、ドラム４から繰り出した一対のワイヤ５，６の方向を転換するプーリー７，８とを有する。したがって、モータの一方向の回転によりドラム４はワイヤ５，６を繰り出し、モータの他方向の回転によりドラム４はワイヤ５，６を巻取る。
【０００９】
照明器具２は、昇降装置１のワイヤ５，６に吊持されて昇降するもので、ドラム４が繰り出し回転すると照明器具２は下降し、ドラム４が巻取り回転すると照明器具２は上昇する。
巻取装置３は、昇降装置１に設けられて照明器具２に一端が接続された電源コード９の他端側を巻き取るとともに、電源コード９の繰り出された部分の重量に相当する巻き上げ力で電源コード９を常時引っ張るように巻き取っている。実施例ではぜんまいばねを用いており、その巻き込み力はワイヤ５，６を繰り出す長さに比例して大きくなり、最大に繰り出されたときに巻き込み力も最大となっている。一方、照明器具２は下降したときワイヤ５，６の繰り出された部分の重量と、電源コード９の繰り出された部分の重量が加算される。このため、巻取装置３の巻き上げ力をワイヤ５，６の重量と電源コード９の繰り出し部分の重量の和に等しくなるように設定すると、モータのモータトルクは安定となり照明器具２の昇降速度を安定化する。
【００１０】
図２は、ワイヤ５，６の繰り出しに対するモータに荷重として加わる器具重量および巻取装置の巻取り力の関係を示す。Ｑ1 は照明器具２自体の重量、Ｑ2 はワイヤ５，６の繰り出した部分の重量、電源コード９の繰り出した部分の重量および照明器具２の重量を加えた全重量であり、繰り出し量に応じて増大することがわかる。Ｑ３は巻取装置３の巻き込み力であり、図２に示すようにワイヤの繰り出し量が零でも一定の巻き込み力を有しており、電源コード９の繰り出し量に比例して巻き込み力を増加している。全重量Ｑ ２ と巻き込み力Ｑ ３ は図２のように勾配が同じ直線を示している。したがって、照明器具２の下降に伴う全重量Ｑ ２ が大きくなっただけ電源コード９の巻取り力も大きくなり、モータからみると重量は安定することとなる。
【００１１】
なお電源コード９の他端は電源に接続されているため、常に電力が照明器具２に供給されている。
この実施例によれば、昇降装置１の動作により照明器具２が昇降する。また照明器具２の昇降に応じて電源コード９が巻取装置３から繰り出されたり巻き取られるが、巻取装置３の巻き込み力を電源コード９の繰り出し部分の重量に相当する力に設定しているため、電源コード９の繰り出し部分の重量が荷重としてモータに加わらず荷重の変動を抑制できるため、モータトルクが安定し照明器具２の昇降速度が安定する。しかも電源コード９は巻取装置３により常にたるみなく張っているため、外観がよい。さらに電源コード９が直線であるためカールコードと比較して掃除がしやすく、巻き上げに際して電源コード９がからまない。またコード切れまたはワイヤ切れが生じても他方は切れていないため照明器具２の落下の危険を防止することができる。
【００１２】
【発明の効果】
この発明の昇降式照明器具は、昇降装置の動作により照明器具が昇降する。また照明器具の昇降に応じて電源コードが巻取装置から繰り出されたり巻き取られるが、巻取装置の巻き込み力を電源コードの繰り出し部分の重量に相当する力に設定しているため、電源コードの繰り出し部分の重量が荷重としてモータに加わらず荷重の変動を抑制できるため、モータトルクが安定し照明器具の昇降速度が安定する。しかも電源コードは巻取装置により常にたるみなく張っているため、外観がよい。さらに電源コードが直線であるためカールコードと比較して掃除がしやすく、巻き上げに際して電源コードがからまない。またコード切れまたはワイヤ切れが生じても他方は切れていないため照明器具の落下の危険を防止することができるという効果がある。
【図面の簡単な説明】
【図１】この発明の一実施例の側面図である。
【図２】ワイヤの繰り出し量に対する重量の関係図である。
【図３】第１の従来例の側面図である。
【図４】第２の従来例の側面図である。
【符号の説明】
１ 昇降装置
２ 照明器具
３ 巻取装置
９ 電源コード[0001]
[Industrial application fields]
The present invention relates to a liftable lighting fixture.
[0002]
[Prior art]
A first conventional example is shown in FIG. That is, this lifting / lowering lighting fixture includes a lifting / lowering device 50 and a lighting fixture 51 that is lifted / lowered by the lifting / lowering device 50, and contacts 53, 54 is provided so that when the lighting fixture 51 is raised, the contacts 53 and 54 come into phase contact with each other so that electric power is supplied to the lighting fixture 51.
[0003]
A second conventional example is shown in FIG. That is, this lifting / lowering lighting fixture includes a spring force lifting / lowering device 55 and a lighting fixture 56 that is suspended and lifted by the spring force lifting / lowering device 55, and a curl cord 58 is wound around a wire 57 of the spring force lifting / lowering device 55. In addition, the light fixture 56 is connected. 59 is a flange.
As a third conventional example, there is, for example, a lifting device and a lighting fixture that is lifted and lowered by the lifting device, and a power cord is fed from a cord reel installed in the lifting device and connected to the lighting fixture. .
[0004]
[Problems to be solved by the invention]
However, the first conventional example has a drawback that the lighting fixture 51 cannot be lit in the lowered position.
In the second conventional example, the lighting fixture 56 can be lit at the lowered position, but when the lighting fixture 56 is raised, the curl cord 58 is easy to sag and the appearance is deteriorated.
[0005]
In the third conventional example, there is a stopper for restricting winding of the power cord on the cord reel, and it is necessary to release the stopper to take up the slack of the power cord.
Accordingly, an object of the present invention is to provide a liftable lighting fixture that can always stretch a power cord without sagging when the lighting fixture is lifted and that can suppress fluctuations in the load applied to the motor.
[0006]
[Means for Solving the Problems]
The lifting / lowering lighting fixture according to the present invention includes a lifting / lowering device that feeds or winds a pair of wires, and a lighting fixture that has both ends attached to the pair of wires suspended from the lifting / lowering device and moves up and down by the operation of the lifting / lowering device. A winding device having a spring that is provided in the lifting device and winds up so as to always pull the other end of the power cord whose one end is connected to an intermediate position between the pair of wires of the lighting fixture,
The winding force of the winding device is set to be equal to the weight of the pair of wires and the feeding portion of the power cord.
[0007]
[Action]
According to the structure of this invention, a lighting fixture raises / lowers by operation | movement of a raising / lowering apparatus. In addition, the power cord is drawn out or taken up from the winding device as the lighting fixture is moved up and down, but the winding force of the winding device is set to a force equivalent to the weight of the power cord feeding portion. Since the weight of the feeding portion is not applied to the motor as a load and fluctuations in the load can be suppressed, the motor torque is stabilized and the lighting apparatus is moved up and down. Moreover, since the power cord is always stretched smoothly by the winding device, the appearance is good. Furthermore, since the power cord is straight, it is easier to clean than the curled cord, and the power cord does not get entangled during winding. Moreover, even if the cord or the wire is cut, the other is not cut, so that it is possible to prevent the lighting device from dropping.
[0008]
【Example】
An embodiment of the present invention will be described with reference to FIGS. That is, the liftable lighting fixture includes a lifting device 1, a lighting fixture 2, and a winding device 3.
The elevating device 1 includes a drum 4 connected to a motor (not shown), and pulleys 7 and 8 that change the direction of a pair of wires 5 and 6 fed out from the drum 4. Therefore, the drum 4 unwinds the wires 5 and 6 by the rotation of the motor in one direction, and the drum 4 winds the wires 5 and 6 by the rotation of the motor in the other direction.
[0009]
The lighting fixture 2 is lifted and lowered by being suspended by the wires 5 and 6 of the lifting device 1. The lighting fixture 2 is lowered when the drum 4 is extended and rotated, and the lighting fixture 2 is raised when the drum 4 is wound and rotated.
The winding device 3 winds up the other end side of the power cord 9 provided at the lifting device 1 and connected at one end to the luminaire 2, and with a winding force corresponding to the weight of the portion of the power cord 9 that is fed out. The power cord 9 is wound up so that it is always pulled. In the embodiment, a mainspring spring is used, and the winding force increases in proportion to the length of the wires 5 and 6 that are drawn out, and the winding force is maximized when the wires are drawn out to the maximum. On the other hand, when the lighting fixture 2 is lowered, the weight of the portion where the wires 5 and 6 are drawn and the weight of the portion where the power cord 9 is drawn are added. For this reason, when the winding force of the winding device 3 is set to be equal to the sum of the weights of the wires 5 and 6 and the weight of the feeding portion of the power cord 9, the motor torque of the motor becomes stable and the lifting / lowering speed of the lighting fixture 2 is increased. Stabilize.
[0010]
FIG. 2 shows the relationship between the weight of the tool applied as a load to the motor and the winding force of the winding device with respect to the feeding of the wires 5 and 6. Q 1 is the weight of the lighting fixture 2 itself, Q 2 is the total weight including the weight of the portion where the wires 5 and 6 are extended, the weight of the portion where the power cord 9 is extended, and the weight of the lighting fixture 2. It can be seen that it increases accordingly. Q 3 is the winding force of the winding device 3, and has a constant winding force even when the wire feed amount is zero as shown in FIG. 2 , and the winding force increases in proportion to the feed amount of the power cord 9. are doing. Total weight Q 2 and entrainment force Q 3 are the slope as shown in FIG. 2 shows the same straight line. Accordingly, the winding force of only the power cord 9 total weight Q 2 to which accompanies the lowering of the lighting fixture 2 is larger increases, when viewed from the motor weight becomes possible to stably.
[0011]
Since the other end of the power cord 9 is connected to a power source, power is always supplied to the lighting fixture 2.
According to this embodiment, the lighting fixture 2 moves up and down by the operation of the lifting device 1. Further, the power cord 9 is unwound from or wound up by the winding device 3 as the lighting fixture 2 is moved up and down. The winding force of the winding device 3 is set to a force corresponding to the weight of the unwinding portion of the power cord 9. Therefore, since the weight of the extended portion of the power cord 9 is not applied to the motor as a load and the fluctuation of the load can be suppressed, the motor torque is stabilized and the ascending / descending speed of the lighting fixture 2 is stabilized. Moreover, since the power cord 9 is always stretched smoothly by the winding device 3, the appearance is good. Furthermore, since the power cord 9 is a straight line, it is easier to clean compared to the curled cord, and the power cord 9 does not get entangled during winding. Further, even if the cord or the wire is cut, the other is not cut, so that it is possible to prevent the lighting device 2 from dropping.
[0012]
【The invention's effect】
In the lifting / lowering lighting fixture according to the present invention, the lighting fixture moves up and down by the operation of the lifting / lowering device. In addition, the power cord is drawn out or taken up from the winding device as the lighting fixture is moved up and down, but the winding force of the winding device is set to a force equivalent to the weight of the power cord feeding portion. Since the weight of the feeding portion is not applied to the motor as a load and fluctuations in the load can be suppressed, the motor torque is stabilized and the lighting apparatus is moved up and down. Moreover, since the power cord is always stretched smoothly by the winding device, the appearance is good. Furthermore, since the power cord is straight, it is easier to clean than the curled cord, and the power cord does not get entangled during winding. In addition, even if the cord or the wire is cut, the other is not cut, so that there is an effect that the danger of falling of the lighting fixture can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of an embodiment of the present invention.
FIG. 2 is a relationship diagram of the weight with respect to the wire feed amount.
FIG. 3 is a side view of a first conventional example.
FIG. 4 is a side view of a second conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lifting device 2 Lighting fixture 3 Winding device 9 Power cord

Claims (1)

一対のワイヤを繰り出しまたは巻き取りする昇降装置と、この昇降装置より垂下した前記一対のワイヤに両端部が取付けられて前記昇降装置の動作により昇降する照明器具と、前記昇降装置に設けられて前記照明器具の前記一対のワイヤ間の中間位置に一端が接続された電源コードの他端側を常時引っ張るように巻き取るばねを有する巻取装置とを備え、
前記巻取装置の巻き込み力が前記一対のワイヤと前記電源コードの繰り出し部分の重量に等しくなるように設定したことを特徴とする昇降式照明器具。 A lifting device that feeds or winds a pair of wires, a lighting fixture that has both ends attached to the pair of wires suspended from the lifting device and moves up and down by the operation of the lifting device, and the lifting device that is provided in the lifting device A winding device having a spring that winds so as to always pull the other end of the power cord, one end of which is connected to an intermediate position between the pair of wires of the lighting fixture,
A lifting / lowering luminaire characterized in that a winding force of the winding device is set to be equal to a weight of a feeding portion of the pair of wires and the power cord.
JP00075894A 1994-01-10 1994-01-10 Elevating lighting fixture Expired - Lifetime JP3726288B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP00075894A JP3726288B2 (en) 1994-01-10 1994-01-10 Elevating lighting fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP00075894A JP3726288B2 (en) 1994-01-10 1994-01-10 Elevating lighting fixture

Publications (2)

Publication Number Publication Date
JPH07211127A JPH07211127A (en) 1995-08-11
JP3726288B2 true JP3726288B2 (en) 2005-12-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP00075894A Expired - Lifetime JP3726288B2 (en) 1994-01-10 1994-01-10 Elevating lighting fixture

Country Status (1)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6142374B1 (en) * 2016-04-21 2017-06-07 株式会社Ｉｓａ Lighting lifting device

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