JPH0646281B2 - Studio background exchange equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a studio background exchange device for exchanging a back screen used as a background when photographing a person or the like in a photo studio. .

(Prior art and problems) When shooting a subject such as a person in a photo studio,
A back screen with an appropriate pattern may be installed behind the subject depending on the purpose of shooting. Such a back screen is, for example, a pattern that is painted on a piece of cloth or the like, and is suspended from near the ceiling of the studio when taking a picture to form a nearly vertical surface, which is rolled up when not shooting. It is often done. The back screen has one end wound around a shaft that is rotated by a manual or electric motor installed near the ceiling of the studio, and the back screen moves up and down as the shaft rotates. The other end of the back screen, which is not fixed to the shaft, is a free end and is extended just above the floor of the studio or until it is spread over the floor for a suitable length. Therefore, it is usual to arrange only one picture back screen on one shaft.

Therefore, in a studio that requires multiple back screens, the above-mentioned shafts are placed on the ceiling to store the back screens, and the back screen with the necessary pattern is selected from them and hung. I use it by lowering it. In order to use a large number of back screens in this way, it is necessary to install a large number of shafts and shaft rotating mechanisms, and a large space for suspending the back screens is required.

In addition, a pre-installed 1 to change the back screen
It is conceivable to replace one shaft with a different back screen, but in this case changing the back screen is not practical because it is a difficult task and takes time. Therefore, it was not possible to quickly replace many back screens at almost the same position.

It is also conceivable to wind a back screen with many patterns on one shaft, but in this case, the free end side must be manually wound and unwound on the floor. This work is difficult to work alone because the back screen is large and heavy, and it takes time to work, the rotation of the shaft does not match the working speed, and the back screen is rubbed on the floor, so the back screen Easy to damage.

In addition, one shaft is placed near the ceiling, the other shaft is placed on the floor or a position lower than the floor, and one end of the back screen, in which multiple patterns are connected in the winding direction, is attached to the upper shaft and the other end. There is also known a device in which a pattern is wound around a lower shaft and a pattern can be selected by rotating the upper and lower shafts. In this case, the back screen required can be quickly selected from a plurality of patterns by rotating one set of shafts.

However, in such a system in which the back screen is wound by a pair of upper and lower shafts, it is necessary to apply strong tension to the back screen in order to stretch the back screen almost vertically without slack, and the back screen is easily damaged. Further, the tensions are likely to be inconsistent at both edges of the back screen, one edge is strongly stretched and the other edge is loosened, which causes a problem as a back screen for photographing. Further, since both ends of the back screen are fixed to the upper and lower shafts, they cannot be wound around one side, and it is not possible to arrange another back screen behind them to increase the number of pictures to be accommodated. Furthermore, in this method, not only are the upper and lower shafts rotated in conjunction with each other, but since the winding radius of the back screen changes momentarily, it is necessary to drive both shafts while changing the relative rotation speed, which is expensive. There is also a problem that a motor drive system is required. Furthermore, the back screen may be extended and used so that the lower part can be spread on the floor as described above, but there is a problem that the back screen cannot be extended to the floor by using the lower shaft. It was

(Object of the Invention) An object of the present invention is to provide a studio background exchanging device that can quickly select and use an arbitrary pattern from a plurality of patterns.

Another object of the present invention is to provide a studio background exchanging device capable of quickly exchanging a large number of patterns at the same position and storing them when not in use.

Further, an object of the present invention is to provide a studio exchange device which can store a large number of patterns on a ceiling or the like, is inexpensive without requiring a large number of back screen winding shafts, and does not require a large depth space. Is to provide.

A further object of the present invention is to provide a studio background replacement device that does not damage or sag the back screen.

Still another object of the present invention is to provide a studio background exchanging device which can be used in a state where the back screen is extended to the floor and a part of the back screen is laid out and the operation at that time is easy.

(Constitution of the Invention) According to the present invention, an object of the present invention is to provide two rotary shafts which are arranged parallel to each other at a position higher than a floor and which can be independently driven to rotate, and whose both ends are wound around the two rotary shafts. A back screen having two or more patterns including a pattern longer than the space between the floor and the rotating shaft in the winding direction, and changing the amount and the position of the back screen hanging from the rotating shaft. This is achieved by a studio background exchange device, which is characterized by what has been made possible.

It is desirable to draw three or more patterns, and ten or more may be drawn, but it is preferable that the selection of the patterns does not take too much time. Further, if it can be used as a pattern that is substantially different from two or more patterns, it also includes a long pattern that continuously changes. Further, the pattern may be drawn on one support, or may be a band formed by joining separately created patterns.

The two rotary shafts may be manually rotated independently of each other, but preferably, they are independently driven to rotate by an electric motor. In this case, the two rotary shafts may rotate independently of each other at a variable speed by a switch. In this case, the rotational positions of the two rotary shafts may be stored in advance in the microcomputer or the like so that the pattern is arranged as the background only by inputting the pattern number.

The back screen hangs down by its own weight, and a folded-back portion is formed below.However, it is of course possible to use this folded-back portion so that it does not touch the floor. You may use it. In this case, by adjusting the feeding amount and the feeding position of both rotary shafts, it is possible to make a part of the long pattern come to the background and another part come to the floor side.

A shaft having a circular cross section may be inserted inside the folded portion of the back screen. This shaft can provide tension to the back screen to enhance its vertical flatness when the fold is higher than the floor, and when the fold is laid on the floor, a person can step on the fold. Folds can be made here to prevent damage to the screen. When the folded-back portion is located higher than the floor, shaking prevention members may be provided at both ends of the shaft so as to abut against the floor surface to prevent the screen from shaking.

Another object of the present invention is to provide two rotary shafts that are arranged parallel to each other at a position higher than the floor and can be independently driven to rotate,
A back screen having both ends wound around the two rotating shafts and having a pattern on both sides, a position that moves in parallel with the two rotating shafts and does not interfere with the back screen, and the back screen hitting the back screen. And a guide shaft that guides the outside of the rotary shaft through both rotary shafts, a part of the pattern is longer than the space between the floor and the rotary shaft, and is hung from the rotary shaft by the guide shaft. It is also achieved by a studio background exchange device characterized in that the pattern on one side of the back screen used can be selected.

In this case, the design is drawn on both sides of the screen,
The number of patterns that can be selected increases, and the selection becomes easier.

Further, the same purpose is to provide two rotary shafts arranged parallel to each other at a position higher than the floor and capable of independently rotating and driving, and a back screen having both ends wound around the two rotary shafts and having a pattern on both sides. A part of the pattern is longer than the space between the floor and the rotary shaft, and at least one of the rotary shafts is relatively movable in the horizontal direction until their positions are reversed, and the movement causes the rotary shaft to move from the rotary shaft. It can also be achieved by a studio background exchanging device characterized in that a pattern on one side of a back screen used by being hung down can be selected.

(Embodiment of the Invention) FIG. 1 is a schematic view of an embodiment of the device of the present invention. In this figure, the back screen 1 has a plurality of patterns in a longitudinal direction (winding) on a flexible support such as canvas cloth or paper.
It is drawn with paint on the direction. Reference numerals 2 and 3 denote rotary shafts around which the above-mentioned back screen 1 is wound, which are independently driven to rotate by electric motors 4 and 5, respectively. The rotation of the rotating shafts 2 and 3 causes the back screen 1 to be wound up or extended. The rotating shafts 2 and 3, the motor and the like are supported by support frames 6 and 7, and the support frames are fixed to the ceiling, walls and the like. It should be noted that at least one of the patterns is continuous longer than the distance from the floor to the rotary shaft.

For example, 10 kinds of patterns are drawn in the winding direction on the back screen 1, and the back screen 1 can be fixed at any position by driving the two motors 4 and 5. The motors 4 and 5 are controlled by switches (not shown). Both motors 4 and 5 may be driven independently, but in that case, tension is applied to the back screen 1 so as not to damage the back screen 1 or damage the motor itself by continuously applying an excessive load. It is preferable to provide a detection mechanism and various switches. For example, both rotary shafts 2 and 3 may be provided with limit switches that stop the motor when the diameter of the back screen 1 wound up reaches a certain value. A limit switch may be provided so as not to be wound further when it reaches a predetermined height close to.

Both motors 4 and 5 may be controlled in conjunction with each other, or may be set in advance so that the design is arranged on the front surface only by designating an arbitrary design with a switch. For example, by setting a magnetic tape or a reflection tape showing a constant digital signal or a bar code corresponding to each pattern on the edge of the back screen 1 and reading these magnetically or optically, the desired pattern can be obtained. You may make it appear to the front.

FIG. 2 is a schematic view of another embodiment of the device of the present invention and is a view of the back screen 1 as seen from the side. In the figure, reference numeral 8 denotes a shaft having a circular cross section, which is inserted inside the folded portion of the back screen 1, and has a diameter which is substantially constant in the loop of the back screen 1. This shaft may be, for example, a hollow plastics pipe and does not have to be particularly heavy and may be appropriately selected depending on the type of the support of the back screen 1, and the back screen 1 may be provided with an appropriate tension for flatness. You should raise it. If the shaft 8 is configured to be floated from the back screen 1 and held when the back screen 1 is rolled up and stored, the flatness is not impaired due to stretching or bending of the screen 1. In the figure, 9 is a ceiling.

FIG. 3 is a schematic view showing a part of another embodiment of the device of the present invention. The shaft 8 has shake prevention members 10, 11 on both sides thereof.
Is attached. It is preferable that both the shake preventing members 10 and 11 have substantially the same size and weight, but it is not always necessary that, when the back screen 1 is lowered, the shake of the shaft 8 is caused by contacting the floor before the back screen 1. It suffices that the back screen 1 is effectively removed to prevent the back screen 1 from swinging forward, backward, leftward and rightward. In other words, it may be one that protrudes below the sfuft 8 and is stably placed on or fixed to the floor. Further, since the shaking prevention member projects beyond the shaft 8, the shaft 8 does not shift to the left and right even if the back screen 1 is repeatedly moved up and down.

FIG. 4 is a schematic view of another embodiment of the present invention. The feature of this embodiment is that the support frames 6 and 7 are supported by the movable table 12. In this case, the back screen can be moved by moving the moving table 12. If the back screen is not large, the motors 4 and 5 may be omitted and the rotary shafts 2 and 3 may be manually rotated.

In any of the above embodiments, both rotary shafts may wind the back screen with the side having the pattern on the inside or the outside.

5A and 5B are views for explaining the principle of another embodiment of the device of the present invention. FIG. 5A is a state in which the back screen 1 is wound up, and FIG. 5B is one surface 1a of the back screen 1.
5C is a side view of the case where the other surface 1b of the back screen 1 is used.

In these figures, 16 is a guide shaft, which is held by a support frame. This guide shaft 16 is a rotary shaft 2,
3 is parallel and is traversable between both rotary shafts 2, 3. That is, as shown in FIGS. 5A and 5B, a position not interfering with the back screen 1 and a position shown in FIG. 5C in which the back screen 1 is guided to the outside of both rotary shafts from this position by passing between the both rotary shafts 2 and 3. Can be moved to and from position.

According to this embodiment, the guide shaft 16 is not
When it is fixed at the first position as shown in FIG. B, one of the patterns included in the one surface 1a is used as the background. Further, when the guide shaft 16 is moved so as to traverse the shafts 2 and 3 as indicated by the arrow 17, one of the patterns included in the other surface 1b of the back screen 1 is used as a background. Therefore, if there are 10 kinds of designs on both sides of the back screen 1, a total of 20 kinds of designs can be exchanged with this device.

6A to 6C are views for explaining the principle of another embodiment of the device of the present invention. In this embodiment, two rotary shafts 2 and 3 are supported in parallel at the same height. 6th A
The figure shows a state in which the back screen 1 is wound up, FIG. 6B is a side view when one side 1a of the back screen 1 is used, and FIG. 6C is a side view when the other side 1b of the back screen 1 is used. is there. In this case, the guide shaft 18 is moved from the bottom to the top between the shafts 2 and 3 as indicated by the arrow 19 so that the surface 1a of the back screen is
Alternatively, 1b is selected.

7A to 7C are views for explaining the principle of another embodiment of the device of the present invention. In this embodiment, the rotary shafts 2 and 3 are
Guide shaft 20
An auxiliary shaft 21 that moves integrally with is provided, and the back screen 1 is passed between both shafts 20 and 21.

FIG. 7A shows a state in which the back screen 1 is wound up,
FIG. 7B is a side view when one surface 1a of the back screen 1 is used, and FIG. 7C is a side view when the other surface 1b of the back screen 1 is used. In this case, the guide shaft 20 and the auxiliary shaft 21 move horizontally across as shown in FIG.
Alternatively, 1b is selected. The back shaft 1 may be sandwiched between the guide shaft 20 and the auxiliary shaft 21. The auxiliary shaft 21 has a function of preventing the back screen 1 from contacting the lower rotating shaft 3 and damaging the design in the state shown in FIG. 3B.

8A to 8C are views for explaining the principle of another embodiment of the device of the present invention. FIG. 8A is a state in which the back screen 1 is wound up, and FIG. 8B is one surface 1a of the back screen 1. 8C is a cross-sectional view of the case where the other surface 1b of the back screen 1 is used. In this embodiment, two rotary shafts 2 and 3 are vertically separated from each other and supported, and one of the shafts 2 is movable relative to the other shaft 3 back and forth. According to this embodiment, the surface 1a or 1b of the back screen 1 is selected by moving one of the rotating shafts 2 as shown by the arrow 22 without using a guide shaft.

(Effects of the Invention) According to the present invention, a studio background exchange device that achieves the above-described objects of the present invention can be obtained. That is, according to the present invention,
By changing the feeding amount and the feeding position of the back screen which is hung from the two rotary shafts, a large number of patterns can be used as the background, and the patterns can be exchanged in a short time. Also, since many patterns can be stored by two rotating shafts, space is saved and there is no risk of damaging or sagging the back screen.
And it is cheap.

Furthermore, since the back screen can control the amount and position of the backing by rotating two rotating shafts independently, it is also possible to float the folded part of the screen from the floor or lay the folded part on the floor for use. It will be possible.

[Brief description of drawings]

1 to 4 are schematic views of an embodiment of the device of the present invention, FIG.
8 to 8 are explanatory views of the principle of another embodiment of the device of the present invention. DESCRIPTION OF SYMBOLS 1 ... Back screen, 1a ... One surface, 1b ... Other surface, 2, 3 ... Rotating shaft, 4, 5 ... Motor, 6, 7 ... Support frame, 8, 13 ... Shaft with a circular cross section, 10 ... Shaking prevention Member, 16, 18, 20 ... Guide shaft.

Claims (6)

[Claims] 1. Two rotary shafts which are arranged parallel to each other at a position higher than a floor and can be independently driven to rotate, and both ends are wound around the two rotary shafts, and the distance between the floor and the rotary shaft is larger than the distance between the floor and the rotary shaft. A back screen having two or more patterns including a long pattern in the winding direction, and the amount and the position of the back screen used by being hung from the rotary shaft can be changed. Background exchange device. 2. The studio background exchanging device according to claim 1, wherein the rotating shaft is rotationally driven by an electric motor. 3. Two rotary shafts arranged parallel to each other at a position higher than the floor and capable of independently rotating and driving, and both ends of the two rotary shafts being wound around the floor and the rotary shaft. A back screen having two or more patterns including a long pattern in the winding direction, and a shaft having a circular cross-section inserted inside the folded portion of the back screen used by being hung from the rotating shaft. Studio background exchange equipment. 4. The studio background exchange device according to claim 3, wherein the shaft having a circular cross section has shake preventing members on both sides thereof, the shake preventing members protruding more than the shaft diameter. 5. Two rotary shafts arranged parallel to each other at a position higher than the floor and capable of independently rotating and driving, and a back screen having both ends wound around the two rotary shafts and having a pattern on both sides thereof. A position that does not interfere with the back screen by moving in parallel with the two rotating shafts and a guide shaft that hits the back screen and guides the back screen to the outside of the rotating shafts through the rotating shafts; A part of the design is made longer than the space between the floor and the rotary shaft, and the design on one side of the back screen used by being hung from the rotary shaft by the guide shaft can be selected. Background exchange device. 6. A pair of rotating shafts arranged parallel to each other at a position higher than a floor and capable of independently rotating and driving, and a back screen having both ends wound around the two rotating shafts and having a pattern on both sides. A part of the pattern is longer than the space between the floor and the rotary shaft, and at least one of the rotary shafts is relatively movable in the horizontal direction until their positions are reversed, and the movement droops from the rotary shaft. A studio background exchange device characterized in that a pattern on one side of a back screen used by being lowered can be selected.