JPS5854736Y2 - floodlight - Google Patents

Description

[Detailed description of the invention] The present invention relates to a floodlight for illumination, in which the light source 2 is disposed on the lens 1 facing the light source 2, and the light source 2 can be moved closer to and away from the lens 1 by rotating the pulley 4 by operating the lever of the operation bundle 3. In the floodlight, a pulley 4 is rotatably attached to a fixed shaft 5, and a tube 6 that surrounds the outer periphery of the fixed shaft 5 from the center of the pulley 4 is tightened by integrally hanging a tube 6, and tightened by attaching a tube 6 to the fixed shaft 5. A split groove 7 parallel to the axial direction of 5 is transparently provided, and the split groove 7
A through hole 9 and a counterbored hole 10 are provided in each of the fastening pieces 8, 8 protruding outward from both sides of the bolt, and the bolt is fastened to the operating bundle 3 which rotates the pulley 4 around the fixed shaft 5. stick 1
1 is provided and the narrow diameter portion 12 at the tip of this tightening rod 11 is provided with a through hole 9.
The threaded part 13 at the tip of the small diameter part 12 is screwed into the threaded hole 10 through the
When tightening into the drilled hole 10, the large diameter portion 14 of the base of the tightening rod 12 is brought into pressure contact with the tightening piece 8.
This relates to a projector that is tightly connected to the outer periphery of a projector.

Floodlights used for stage lighting etc. are generally shown in Figures 1 and 2.
The structure is as shown in the figure.

In other words, the light distribution of the projector is controlled by continuously changing the distance between the lens 1 and the light source 2. However, when moving the light source 2, the light source 2 must be moved along the rail 15. By rotating the pulley 4 with the operating bundle 3, the pulley 4 moves the wire 17, and the wire 17
The guide bed 16, which is fixed to the guide bed 16, is moved.

When the position of the light source 2 with respect to the lens 1 is determined by moving the guide bed 16 in this manner, the spread of light is determined and light distribution control is performed.

In Figures 1 and 2, 18 is a reflector, 19 is the main body of the projector,
20 is an outer cable.

By the way, when the light source 2 is moved in this way, it is then necessary to fix the light source 2 at that position.

Therefore, conventionally, as shown in FIG. 3, a coupling 21 is fixed to the lower surface of the main body 19, a rotating shaft 22 is rotatably passed through the coupling 21, a pulley 4 is fixed to the upper end of the rotating shaft 22, and a pulley 4 is fixed to the upper end of the rotating shaft 22. Operation bundle 3 screwed and fixed to
is screwed into the rotating shaft 22 by turning it in the direction of the arrow a, thereby bringing the front surface 23 of the operating bundle 3 into pressure contact with the lower end of the outer periphery of the coupling 21, thereby fixing the rotating shaft 22 and fixing the pulley 4 at a predetermined rotational position. , the position of the light source 2 was fixed.

However, in this one, the coupling 21 and the operating handle 3
Since the contact area with the front surface 23 is small, the tightening force is weak, and there is a drawback that the pulley 4 will move if a small amount of external force is applied to the operating handle 3.

Therefore, as shown in FIG.
There is also a device in which the rotating shaft 22 is fixed by using a screw, but this requires two operations: moving the light source 2 using the operating handle 3 and fixing it using the set screw 24, so it takes time to adjust the light distribution. was there.

The present invention has been developed in view of the above points, and it is possible to firmly fix the pulley and completely fix the position of the light source, and at the same time, the operation handle that adjusts the position of the light source can be used to fix the position of the light source. The object of the present invention is to provide a floodlight that can also perform the following functions.

The present invention will be explained in detail below with reference to Examples.

The pulley 4 used in the present invention is horizontally rotatably attached to the outer periphery of a fixed shaft 5 fixed to the main body 19 via a shaft mounting bracket 25 fixed to the main body 19, and is attached to the main body from the lower surface of the center. 19 is tightened downward so that the tube 6 hangs down integrally.

For this tightening, the tube 6 is provided so as to surround the outer periphery of the fixed shaft 5, and a vertical groove 7 is provided therethrough.

Tightening is done using tightening pieces 8, 8 on both sides of the split groove 7 on the outer periphery of the tube 6.
are provided in a protruding manner, respectively, and a through hole 9 and a tapped hole 10 are provided in each of the fastening pieces 8, 8 so as to face each other.

Further, a tightening rod 11 is protruded from the tip of the operating handle 3, and includes a large diameter portion 14 on the base side and a narrow diameter portion 12 on the tip side.
A threaded portion 13 is provided at the tip of the narrow diameter portion 12.

The operating handle 3 is fastened to the tube 6 by rotatably inserting the narrow diameter portion 12 into the through hole 9 and screwing the threaded portion 13 into the tapped hole 10.

Tightening is achieved by lever operating the operation handle 3 in the horizontal direction as shown by the arrow in Figure 6, which turns the pulley 4 through the tube 6 and moves the light source 2. 2 in a predetermined position, in this state, turn the operating handle 3 around the axis as shown by arrow C in FIG. The tightening piece 8 on the outer periphery of the through hole 9 is pressed at the tip of the 14, and the inner diameter of the tightening tube 7 is reduced so that the opening width of the split groove 7 is sandwiched, and the tightening tube 6 is tightened on the outer periphery of the fixed shaft 5. Tight,
Pulley 4 is fixed to fixed shaft 5.

By fixing the pulley 4 in this manner, the position of the light source 2 is fixed.

To release the fixation, simply turn the operating handle 3 in the opposite rotation direction.

As mentioned above, in this invention, tightening can be done over a wide area by tightening the inner circumference of the cylinder to the outer circumference of the fixed shaft, and the pulley can be firmly fixed to fix the position of the light source. In addition to being able to tighten the cylinder completely, the tube can be tightened by rotating the operating handle, so the operating handle that adjusts the position of the light source can also be used to fix the position of the light source at the same time, allowing quick dimming operations. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the floodlight, Fig. 2 is a partially cutaway perspective view of the same as above, Fig. 3 is an enlarged sectional view of a conventional example, Fig. 4 is an enlarged sectional view of another conventional example, and Fig. 5 is a main Enlarged sectional view of the idea-embodiment;
FIG. 6 is a bottom view of FIG. 5. 1 is a lens, 2 is a light source, 3 is an operating handle, 4 is a pulley, 5 is a fixed shaft, 6 is a tightening tube, 7 is a split groove, 8 is a tightening piece, 9 is a through hole, 10 is a punch hole, 11 is a tightening rod, 12 is a small diameter portion, 13 is a threaded portion, and 14 is a large diameter portion.

Claims (1)

[Scope of utility model registration request] In a projector in which the light source is arranged opposite to the lens and the light source can be moved close to and away from the lens by rotating the pulley by operating a lever on the control bundle, the pulley is rotatably mounted on a fixed shaft, and the fixed shaft is connected from the center of the pulley. For tightening, a tube is installed vertically in one piece surrounding the outer circumference of the tube, and for tightening, a split groove parallel to the axial direction of the fixed shaft is cut through the tube, and each tightening piece is protruded outward from both sides of the split groove. A through hole and a threaded hole opposite thereto are provided, and a tightening rod is provided in the operation bundle that rotates the pulley around a fixed axis. Screw the threaded part at the tip of the diameter part into the threaded hole, and tighten the threaded part into the threaded hole by rotating the operating bundle to press the large diameter part of the base of the tightening rod against the tightening piece. A floodlight whose tube is tightly connected to the outer periphery of a fixed shaft.