JPH11223852A - Color changer for illumination - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably feed film by taking up the film without causing looseness and to improve durability by using a coil spring. SOLUTION: In this color changer for illumination, the 2nd roll piece 5b of a 1st rotary shaft 3 on a film take-up side is tensioned by using the coil spring 50, so that durability is made high and stable tension is continued over a long term in comparison with using a spiral spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color changer for lighting, and more particularly, to a method for moving a color film with a single motor and applying a constant tension to the color film repeatedly for a long time using a coil spring. Regarding new improvements.

[0002]

2. Description of the Related Art Although not shown, this type of illumination color changer generally used in the past has a first rotation axis and a second rotation axis disposed in parallel in a box-shaped base. The first and second rotating shafts are fixedly provided with first and second rolls extending in the axial direction. One end of a long color film is fixed to the first roll, a large number of the color films are wound around the second roll, and the other end is fixed. The color film is arranged so that a number of colors are divided in the longitudinal direction, that is, the moving direction. Therefore, by winding the color film by the first roll, an arbitrary color can be made to appear between the first roll and the second roll according to the winding amount of the color film.

[0003]

Since the conventional color changer for lighting is configured as described above, there are the following problems. That is, since the means for applying tension to the first roll on the side where the color film is taken up is constituted by a spiral spring, the durability is poor, and the tension is broken by a sudden release of tension about 100 times.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, a single motor is used to move a color film, and a coil spring is used to repeatedly fix the color film over a long period of time. It relates to a new improvement for applying tension.

[0005]

SUMMARY OF THE INVENTION A lighting color changer according to the present invention comprises first and second color filters arranged at both ends of a substrate.
It comprises first and second rotation shafts for rotating the rolls, and a color film wound and wound on the first and second rolls, and a light is applied to the color film from behind to arbitrarily control the color film. The illumination color changer configured to project the color of
A second roll piece rotatably provided on a rotary shaft and forming a part of the first roll; first and third roll pieces rotatably provided at both ends of the first rotary shaft; A coil spring provided on the outer periphery of a shaft and connected between the second roll piece and the first rotary shaft, wherein the second roll piece is rotationally biased with respect to the first rotary shaft via the coil spring. This is a configuration that receives the

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a color changer for lighting according to the present invention will be described below in detail with reference to the drawings. In FIG. 1, a reference numeral 1 denotes a box-shaped base. A circular opening 2 is formed at the center of the base 1, and one end is provided at each end of the base 1 so as to sandwich the opening 2. The first rotation shaft 3 and the second rotation shaft 4 are arranged in parallel. First and second rolls 5 and 6 are disposed at the center of the first and second rotation shafts 3 and 4, and the second roll 6 is rotated by a pin (not shown) into a second roll.
A color film 8 is wound around the rotary shaft 4 while being integrally fixed therewith. The first roll 5 includes a first roll piece 5 a located at one end of the first rotating shaft 3, a second roll piece 5 b located at the center of the first rotating shaft 3, and a first rotating shaft 3.
And a third roll piece 5c located at the other end of the
The third roll pieces 5a and 5c are provided on the first rotating shaft 3 in a free rotation state, and the second roll piece 5b is a roll portion rotatable via a pair of bearings 100 as shown in detail in FIG. 5bA, a top 5bB fixed to the rotating shaft 3 by a screw 101, and a roll portion 5bA wound around the rotating shaft 3.
And a coil spring 50 connected between the tops 5bB. In addition, by providing a cylindrical member 5bC between the roll portion 5bA and the top 5bB, the coil spring 5b is provided.
0 and the color film 8 are prevented from contacting each other. Also,
Both ends and the center in the width direction of one end 8a of the long color film 8 are the roll pieces 5a, 5b, 5 respectively.
c. Although not shown, the hook provided at one end 8a of the color film 8 is
b.

Further, at the end of the second roll 6, as shown in FIG. 5, a bearing body 30 is constantly urged outward through a spring 31 so as to be operable. It is detachably engaged with a third rotating shaft 32 provided on the fourth bearing 10b. Further, both ends of the first rotating shaft 3 are rotatably held by a pair of first and second bearings 9a and 9b provided on the base 1, and the second rotating shaft 4 is connected to the third
The bearings 9a, 9b are detachably mounted on bearings 10a.
And 10a, 10b are fixed to supporting members 11a, 11b and 12a, 12b erected from the base 1 (see FIG. 2). The color film 8 is arranged so that a number of colors are divided in the longitudinal direction, that is, the moving direction. Accordingly, the color of the color film 8 corresponding to the opening 2 can appear arbitrarily according to the winding amount of the color film 8.

[0008] First and second pulleys 12 and 13 are fixedly mounted at outer positions of the first and third rotary shafts 3 and 31 passing through the bearings 9a and 10b, respectively. The pulley 13 is connected via a timing belt 14 as shown in FIG. 3, and the timing belt 14 is used to transmit the driving force of the timing belt 14 to the first and second pulleys 12 and 13 properly. The biasing idler roller 15 is urged. A DC servo motor 16 with an encoder is disposed in the base 1, and a driving pulley 17 provided on the DC servo motor 16 and a second pulley 13 of the second rotating shaft 4 are connected via a driving belt 18. Are linked. Therefore, this DC servo motor 16
Is driven, the second through the drive belt 18
The rotating shaft 4 and the third rotating shaft 31 rotate, and the rotating force is also transmitted to the first rotating shaft 3 via the timing belt 14. As a result, the first rotating shaft 3 and the second rotating shaft 4
Can be rotated synchronously in the same direction. When synchronizing the first rotating shaft 3 and the second rotating shaft 4, it is preferable that the diameter of the first pulley 12 and the diameter of the second pulley 13 be the same.

After the color film is fixed, the coil spring 50 has a function of applying a pretension for turning the second roll piece 5b in the direction A, whereby the slack of the color film 8 due to the thickening of the color film 8 is prevented. It becomes possible to prevent. Therefore, the coil spring 50 is provided between the second roll piece 5b and the first rotating shaft 3 and operates.

Further, a cooling fan 25 for preventing the color film 8 from being deformed by heat received from the light and an origin finding photo sensor 26 for reading an origin symbol attached to the color film 8 are provided in the base 1. , A board 27 for controlling the DC servomotor 16 and the like, a connector 28 for connecting to a power supply (not shown), and a connector 29 for sending a signal by remote control to the board 27.

Next, the operation of the illumination color changer according to the present invention will be described based on the above-described configuration. First, the second roll 6 having the wound color film 8 is mounted on the third and fourth bearings 10a and 10b, and the hook at one end of the color film 8 is wound around the second roll 5b of the first roll 5. The color film 8 is formed by the action of the coil spring 50.
Has a function of returning in the direction of arrow A, so that the tension is applied to the color film 8 and after the mounting of the color film 8 is completed, the DC servo motor 16 is driven to rotate each of the rotating shafts 3 and 4, thereby causing the first While the color film 8 is wound by the second rolls 5 and 6, the entire length of the color film 8 is read by the encoder 16a of the DC servo motor 16, and the color film 8 is stopped at the initial position by the origin-finding photo sensor 26. The address is determined for each color arrangement of the color film 8 with the position as the origin (reference). Next, after selecting an arbitrary address of the color film 8 by remote operation, when the DC servo motor 16 is driven, the first and second rotating shafts 3 and 4 rotate by a predetermined amount in the same direction, and the color film 8 is rotated. 8 is moved in the direction of arrow D, for example. At this time, the color film 8 is wound around the first roll 5 by a predetermined amount, and is sent out from the second roll 6 by a predetermined amount. In the case where the color film 8 is moved in the direction of arrow D, the above is reversed.

While the color film 8 is moving, the rotational energy stored in the coil spring 50
A reaction force to rotate the first roll 5 in the rotation direction of the first rotation shaft 3, that is, the direction opposite to the feeding direction of the color film 8 occurs, and as a result, the first roll 5 and the second roll 6 The rotating movement is performed while an appropriate tension is always applied to the color film 8 in between. Thereafter, the DC servo motor 16 is stopped at the same time when the color film 8 reaches a predetermined address.

[0013]

The illumination color changer according to the present invention is configured as described above, so that the following effects can be obtained. That is, since the second roll piece of the first rotating shaft is wound while applying tension to the film by applying a rotating force in the opposite direction to the film feeding direction by the coil spring, it is possible to wind the wound film without giving a slack to the wound film. It is possible to feed the film stably, and to improve the durability as compared with the related art since the coil spring is used.

[Brief description of the drawings]

FIG. 1 is a front view showing a state where a front cover is removed from a lighting color changer of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a cross-sectional view showing a main part of the illumination color changer of the present invention.

FIG. 5 is a sectional view showing a main part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 1st rotation axis 4 2nd rotation axis 5 1st roll 6 2nd roll 8 Color film 5a 1st roll piece 5b 2nd roll piece 5c 3rd roll piece 50 Coil spring

Claims (1)

[Claims] 1. A first and a second member disposed at both ends of a base (1).
First and second rotation axes (3, 4) for rotating the rolls (5, 6);
A color film (8) that is wound around the first and second rolls (5, 6) and is wound up and rewinded. A second roll piece (5b) rotatably provided on the first rotating shaft (3) and forming a part of the first roll (5).
First and third roll pieces (5a, 5c) rotatably provided at both ends of the first rotary shaft (3); and the second roll piece provided on the outer periphery of the first rotary shaft (3). A coil spring (50) connected between the piece (5b) and the first rotating shaft (3);
The second roll piece (5b) is connected to the first rotating shaft via (50).
(3) An illumination color changer characterized in that it is configured to receive a rotational bias in one direction with respect to (3).