JP3751070B2 - Theater thruster - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a theater projection device.
[0002]
[Prior art]
In the amusement device that moves up and down the abyss of the theater and the stage, in order to prevent the object from being caught when the aggression descends when the object protrudes between the fixed floor of the stage and the adjacent urge A device having countermeasures as shown in FIG. 4 is known.
[0003]
A safety bar 2 that extends substantially horizontally below the edge of the squeeze 1 is suspended by a wire 3 having a predetermined length, and a link mechanism 4 that supports the safety bar 2 so as to be movable in parallel in the vertical direction between the squeeze 1. Provided. When the safety bar 2 approaches the squeeze 1 side to a predetermined value or more, a limit switch 5 that is pressed and turned on by the movement of the link function 4 is arranged in the squeeze 1, and when the switch 5 is turned on, the squeezing 1 is lowered. It comes to stop. 6 represents the fixed floor of the stage, and 7 represents the next door.
[0004]
[Problems to be solved by the invention]
However, since the safety bar 2 has a connecting function of the link mechanism 4, the safety bar 2 is made of a metal or a similar material from the viewpoint of securing necessary rigidity. Therefore, there is a problem that one safety bar extending along the edge of the squeeze 1 is considerably heavy, and depending on the descending speed, the object 8 protruding to the squeeze 1 side may be excessively impacted.
[0005]
The present invention has been made paying attention to such problems, and an object of the present invention is to provide a pinching prevention means that is easy to hit an object and has high safety.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, in the projection device for moving up and down the abyss and the stage of the theater, a tunnel extending straight at the edge is provided on the lower surface of the projection, and the light emitting unit and the light receiving unit of the photoelectric switch facing each other through the tunnel are respectively stayed. The above tunnel is formed by a flexible light-shielding sheet such as rubber that hangs in a U-shaped cross section from the lower surface edge of the pressing, and the edge extends straight on the lower surface of the pressing. A pipe material having a cross-section is disposed, and both side edges of a flexible light-shielding sheet are bonded to both sides thereof, and the tunnel is formed by a sheet portion that hangs in a U-shaped cross section with the pipe member interposed therebetween. An antireflection hole that opens the lower surface is provided near the center of the pipe material .
According to the second aspect of the present invention, in the projection device for moving up and down the abyss and the stage of the theater, a tunnel extending straight at the edge is provided on the lower surface of the projection, and the light emitting portion and the light receiving portion of the photoelectric switch facing each other through the tunnel are respectively stayed. The above tunnel is formed by a flexible light-shielding sheet such as rubber that hangs in a U-shaped cross section from the lower surface edge of the pressing, and the edge extends straight on the lower surface of the pressing. A pipe material having a cross-section is disposed, and both side edges of a flexible light-shielding sheet are bonded to both sides thereof, and the tunnel is formed by a sheet portion that hangs in a U-shaped cross section with the pipe member interposed therebetween. A reflection prevention plate is formed near the center of the pipe material so as to block a part of the tunnel cross section from the lower surface with a flexible light shielding sheet such as rubber.
[0007]
In the third invention, a leaf spring that is easily elastically deformed in the impending movement direction is provided as the stay member of the light emitting part and the light receiving part of the photoelectric switch in the first or second invention.
[0010]
[Action]
According to the first and second inventions, when the object descends, when the object protrudes from the fixed floor of the stage or the adjacent object, and the object touches the flexible light-shielding sheet, the tunnel is deformed so as to be crushed by the object. . When the collapsed portion blocks light from the light emitting portion to the light receiving portion, the photoelectric switch is switched off. Therefore, when the photoelectric switch is interposed in the power supply circuit of the driving device that moves up and down, the driving device stops when the switch is turned off, so that it is possible to effectively prevent the object from being caught. In this case, since the part which touches a thing is a flexible light-shielding sheet, it is easy to hit the object due to the impending descent, and high safety can be ensured.
[0011]
According to the third invention, when an object hits the light emitting part or the light receiving part of the photoelectric switch as the pressure drops, the leaf spring is elastically deformed, and the light reception of the photoelectric switch is cut off due to the positional relationship between them, Since the impulsive driving device stops when the switch is turned off, it is possible to prevent the object from being caught by the light emitting unit and the light receiving unit.
[0012]
According to the first invention, a pipe material having a rectangular cross section is used as an attachment portion, and both side edges of a flexible light shielding sheet are bonded to both sides thereof, whereby a tunnel is formed on the lower surface of the pipe member and the light shielding sheet hanging in a U-shaped section. Easy to form. Since the light diffuses to some extent, it is well reflected near the middle of the light emitting part and the light receiving part of the photoelectric switch. Therefore, light can be blocked with a small deformation amount of the light shielding sheet near the photoelectric switch, but light cannot be blocked unless the deformation amount is large near the middle of the light emitting unit and the light receiving unit. As a countermeasure, an anti-reflection hole is provided, so that light is absorbed inside the pipe member and is not reflected near the middle of the light-emitting part and light-receiving part, ensuring a constant sensitivity of the photoelectric switch regardless of the deformation position of the light-shielding sheet. it can.
[0013]
According to the second invention, since the reflection preventing plate blocks the light diffused from the light emitting portion and reflected by the pipe member, the reflected light can be prevented from entering the light receiving portion. Therefore, as in the third aspect of the invention, the sensitivity of the photoelectric switch can be kept constant regardless of the deformation position of the light shielding sheet. Since the anti-reflection plate is made of a flexible light-shielding sheet such as rubber, the gentleness to the object can be kept good.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2, reference numeral 10 denotes a theater atrium and a stage for moving up and down, and a steel pipe 12 having a rectangular cross section that forms a mounting surface of a rubber sheet 11 described later is attached to the lower surface of the edge. By screwing both side edges of the rubber sheet 11 to both sides of the steel pipe 12 at a predetermined interval, a tunnel 13 that extends straight on the edge of the squeeze 10 with the rubber sheet 11 that hangs in a U-shaped section across the steel pipe 12 is formed. It is formed. The sheet 11 may be formed of a material other than rubber as long as it is a flexible light shielding sheet.
[0015]
A light emitting portion 14a and a light receiving portion 14b facing each other through the tunnel 13 are provided, and a photoelectric switch 14 is configured between them. In order to increase the sensitivity of the photoelectric switch 14, the light emitting portion 14a and the light receiving portion 14b are attached to the squeegee 1 via stays 15 extending from both ends of the stay pipe 12 to the curved portion (lowermost portion) of the U-shaped section of the rubber sheet 11, respectively. It is done. The stay 15 is formed by a leaf spring that is easily elastically deformed in the moving direction of the squeezed 10 in order to detect the pinching of an object due to the light emitting portion 14a and the light receiving portion 14b.
[0016]
By opening the lower surface near the center of the steel pipe 12 along the edge of the squeeze 10 (a region where light from the light emitting portion 14a is easily reflected to the light receiving portion 14b), the light from the light emitting portion 14a is piped in a rectangular cross section. 12 is provided with an anti-reflection hole 16 for absorption. Although not shown, the photoelectric switch 14 is interposed in the power supply circuit of the driving device that moves up and down the squeeze 10, and when the light to the light receiving unit 14b is interrupted, the photoelectric switch 14 is turned off, and the driving device of the squeezing 10 is stopped at that position. It has become. Reference numeral 17 denotes an optical axis between the photoelectric switches 14.
[0017]
With such a configuration, when the squeeze 10 is lowered, an object protrudes from the fixed floor of the stage or an adjacent squeeze, and when the rubber sheet 11 of the squeeze 10 is touched, the tunnel 13 is deformed by being pressed by the object. When the collapsed portion blocks light from the light emitting portion 14a to the light receiving portion 14b, the photoelectric switch 14 is turned off. Therefore, since the driving device of the squeezing 10 stops when the switch 14 is turned off, it becomes possible to effectively prevent the object from being caught by the squeezing 10.
[0018]
Since the portion that touches the object on the side of the squeeze 10 is the rubber sheet 11, the contact with the object is easy and high safety can be ensured. Even if an object hits the light emitting part 14a or the light receiving part 14b of the photoelectric switch 14, it is buffered by the elastic deformation of the leaf springs, and the light to the light receiving part 14b is blocked by the displacement of these positional relationships. 14a and the light receiving part 14b can be easily prevented from being caught.
[0019]
Structurally, the steel pipe 12 having a rectangular cross section is used as an attachment portion, and both side edges of the rubber sheet 11 are bonded to both sides thereof, so that the tunnel 13 can be easily and easily formed with the sheet 11 that hangs in a U-shaped cross section across the steel pipe 12. Can be easily formed. Since the light diffuses to some extent, the steel pipe 12 reflects light well near the middle of the light emitting portion 14a and the light receiving portion 14b of the photoelectric switch 14, but in this example, since the antireflection hole 16 is provided, the light is piped. Since it is absorbed in the 12 members and is not reflected near the middle of the light emitting portion 14a and the light receiving portion 14b, the sensitivity of the photoelectric switch 14 can be kept constant regardless of the deformation position of the rubber sheet 11.
[0020]
FIG. 3 shows an embodiment in which reflected light to the light receiving portion 14a is blocked, and a reflection blocking plate that hangs from the lower surface of the steel pipe 12 along the edge of the squeezing portion 10 so as to block a part of the tunnel cross section. 18 is provided. The antireflection plate 18 is formed of a rubber sheet in the same manner as the material for forming the tunnel 13 in order to keep the gentleness to hit the object well. According to this, since the reflection blocking plate 18 is diffused from the light emitting portion 14a and the light reflected by the steel pipe 12 is blocked, the photoelectric switch 14 of the photoelectric switch 14 is controlled regardless of the deformation position of the rubber sheet 11 as in the above embodiment. Sensitivity can be kept constant.
[0021]
【The invention's effect】
According to the first and second aspects of the present invention, in the thrusting device for raising and lowering the abyss and the stage of the theater, the light emitting part and the light receiving part of the photoelectric switch facing each other through the tunnel are provided with a tunnel extending straight on the lower surface of the thrusting. Since the tunnel is formed by a flexible light-shielding sheet such as rubber that hangs in a U-shaped section from the lower edge of the approach, the photoelectric switch is deformed by the deformation of the light-shielding sheet. When the light is cut off, it is possible to prevent the object from being caught by stopping the pressing by turning off the switch. Moreover, since the part which touches a thing is a flexible light-shielding sheet, the contact with an object is easy and high safety | security can be ensured. It is easy to hit objects and can ensure high safety.
[0022]
According to the third invention, as the stay members of the light emitting unit and the light receiving unit of the photoelectric switch in the first and second inventions, the leaf springs that are easily elastically deformed in the moving direction are provided. If an object hits the light emitting part or light receiving part of the photoelectric switch, the leaf spring will be deformed and the light reception of the photoelectric switch will be interrupted due to the displacement of these positional relations. It becomes possible to prevent.
[0023]
According to the first aspect of the present invention, the pipe material having a rectangular cross section extending straight at the edge thereof is disposed on the underside of the approach, and the both side edges of the flexible light-shielding sheet are bonded to both sides of the pipe member so as to sandwich the cross section. A tunnel is formed by the sheet part that hangs in a U-shape, and an antireflection hole that opens the lower surface is provided near the center of the pipe material along the approaching edge, so that light is absorbed into the pipe member through the antireflection hole. Since the light is not reflected near the middle between the light emitting part and the light receiving part, the sensitivity of the photoelectric switch can be ensured regardless of the deformation position of the light shielding sheet.
[0024]
According to the second aspect of the present invention, a rectangular cross-section pipe material extending straight at its edge is disposed on the underside of the approach, and both sides of the flexible light-shielding sheet are bonded to both sides thereof to sandwich the pipe member. A tunnel is formed by the sheet part that hangs in a U-shape, and a reflection prevention plate that hangs so as to block a part of the tunnel cross section with a flexible light-shielding sheet such as rubber from the lower surface near the center of the pipe material along the approaching edge. Therefore, since the reflection blocking plate blocks the light received from the light emitting portion and reflected by the pipe member, the sensitivity of the photoelectric switch can be kept constant regardless of the deformation position of the light shielding sheet. In addition, since the reflection preventing plate is made of a flexible light shielding sheet such as rubber, the gentleness to the object can be kept good.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view in the A direction.
FIG. 3 is a cross-sectional view showing another embodiment.
FIG. 4 is a cross-sectional view illustrating a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Approaching 11 Rubber sheet 12 Steel pipe 13 Tunnel 14 Photoelectric switch 14a Light emitting part 14b Light receiving part 15 Stay 16 Antireflection hole 18 Antireflection board

Claims (3)

In the amusement device that moves up and down the abyss and the stage of a theater, a tunnel that extends straight at the edge is provided on the underside of the approach, and the light emitting part and the light receiving part of the photoelectric switch facing each other through the tunnel are approached through the stay members, respectively. The tunnel is formed by a flexible light-shielding sheet such as rubber that hangs in a U-shaped cross section from the edge of the approaching lower surface, and a rectangular cross-section pipe material extending straight at the edge of the approaching lower surface. The two sides of the flexible light-shielding sheet are bonded to both sides, and the tunnel is formed by a sheet portion that hangs in a U-shaped section across the pipe member, near the center of the pipe material along the approaching edge. A theater projection device, characterized in that an antireflection hole is provided in the lower surface . In the amusement device that moves up and down the abyss and the stage of a theater, a tunnel that extends straight at the edge is provided on the underside of the approach, and the light emitting part and the light receiving part of the photoelectric switch facing each other through the tunnel are approached through the stay members, respectively. The tunnel is formed by a flexible light-shielding sheet such as rubber that hangs in a U-shaped cross section from the edge of the approaching lower surface, and a rectangular cross-section pipe material extending straight at the edge of the approaching lower surface. The two sides of the flexible light-shielding sheet are bonded to both sides, and the tunnel is formed by a sheet portion that hangs in a U-shaped section across the pipe member, near the center of the pipe material along the approaching edge. protruding theater for a flexible light-shielding sheet such as rubber from its lower surface, characterized in that the formation of the reflection preventing plate sagging to block a portion of the tunnel cross section Location. 3. The pushing-out device according to claim 1, wherein a leaf spring that is easily elastically deformed in a moving direction is provided as a stay member of the light-emitting part and the light-receiving part of the photoelectric switch.

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