JP2007141458A - Light batten lifting unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light batten lifting unit enabling fine setting of an illumination or the like, preventing an inadvertent touching by a human being, practically nullifying adjustment after installation and drastically shortening the time of an installation work, and capable of doing away with falling accidents of the light batten due to wire break. <P>SOLUTION: The unit is provided with two pairs of branch pulleys arranged in separation from each other in a horizontal direction, a pair of rotating drums arranged between the two branch pulleys, a rotating drive device for rotating the rotating drums, hanging wires each with one end fixed to a corresponding rotating drum and the other end fixed to the light batten, and guide pulleys for directing each hanging wire moving through each branch pulley toward the corresponding rotating drum. A direction of the rotating axis of the pair of rotating drums is in a direction where the two pairs of branch pulleys are opposed to each other. Each hanging wire passes through the respective branch pulleys and guide pulleys, and wound on/rewound from the respective rotating drum. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for raising and lowering a suspended object, and more particularly, to an elevation unit for raising and lowering an illumination baton used in a studio, a theater, and the like.

  As is well known, a large number of lighting batons are arranged on the ceiling in a studio, a theater, or the like in order to suspend various devices such as a lighting device, a hanging microphone, and a large tool. The lighting baton is preferably installed in a closer positional relationship in order to increase the flexibility of the studio (for example, the installation position of the lighting device or the like can be set finely). However, in the conventional device for raising and lowering the illumination baton, since the central axis of the drum for winding the hanging wire is arranged at right angles to the direction of the illumination baton, the rotation axis length of the motor and the rotation of the drum It was essentially impossible to install illumination batons at intervals smaller than the combined axial length (see, for example, Patent Document 1). In addition, since the lighting baton elevating device is usually attached to a grid suspended from the ceiling, it has been difficult to install a large number from the viewpoint of building strength.

  In addition, because of the weight and size of the lifting device, the pulleys and motors, etc., are brought into the installation location as parts and positioned and installed on the spot. Since the work is performed at a high place, there is a risk of causing an accident due to dropping of tools and parts. In addition, since it is so-called on-site installation, adjustment after installation is indispensable, resulting in a long installation work time.

On the other hand, in recent studios, particularly TV studios, there is an increasing tendency for program staff to move and work on catwalks attached to a lattice. For this reason, there is a tremendous increase in the possibility that people who have no experience or knowledge about the lifting device will inadvertently touch the lifting device and get injured or that the lifting device will break down. In addition, accidents such as the wire being cut due to aging fatigue, the lighting baton that suspended the lighting device etc. dropped, and the person underneath were injured have occurred, and the emergence of a safe lifting device is desired. ing.
Japanese Patent Laid-Open No. 7-288026

  It is an object of the present invention to provide an illumination baton lifting / lowering unit that can reduce the distance between illumination batons by downsizing, thereby enabling fine settings such as illumination.

  The present invention can also eliminate the possibility that a person inadvertently touches the lifting mechanism to get injured, or that the lifting mechanism breaks down. It is intended to provide an illumination baton lifting / lowering unit that can greatly reduce the length of the illumination baton and can eliminate the fall accident of the illumination baton due to wire cutting.

  An illumination baton lifting / lowering unit according to the present invention includes two pairs of branch pulleys that are spaced apart from each other in the horizontal direction, a pair of rotating drums that are disposed between the two pairs of branch pulleys, and a rotating drum. The rotary drive device, a suspension wire having one end fixed to the corresponding rotating drum and the other end fixed to the lighting baton, and each suspension wire moving through each branch pulley to the corresponding rotating drum. And a guide pulley for directing each. The direction of the rotation axis of the pair of rotating drums is located in the direction in which the two pairs of branch pulleys face each other. Each suspension wire passes through a respective branch pulley and guide pulley and is wound / rewinded on a respective rotating drum.

  The lighting baton lifting / lowering unit according to the present invention can also have moving means for moving the rotating drum in the direction of the rotation axis in response to the rotation of the rotating drum on at least one rotating drum. The moving means includes a male screw member fixed so as to extend toward the rotation center of at least one rotary drum, and a male screw provided to extend in the rotation axis direction of the rotary drum at the rotation center of the rotary drum. The pitch of the male screw member and the female screw member can be determined by the thickness of the suspended wire in the direction of the rotation axis when the rotary drum rotates once. It is formed to move by the minute.

  In the lighting baton lifting / lowering unit according to the present invention, each pair of branch pulleys is arranged so as to be separated from each other in a direction intersecting with a direction in which the two pairs of branch pulleys face each other, and the direction of the rotation axis of each branch pulley is 2 Winding for winding / unwinding each suspension wire guided through each pair of branch pulleys on a pair of rotating drums, positioned in a direction crossing the opposite direction of the pair of branch pulleys A rotation drum is provided on each side of the rotation drive device in a direction opposite to the direction in which the two pairs of branch pulleys face each other, and each of the guide pulleys is in the vicinity of the winding portion in the opposite direction from each branch pulley. The rotation axis of each guide pulley is oriented in a direction perpendicular to the rotation axis of the rotary drum, and the extension of the rotation center plane of each guide pulley is wound on the corresponding rotary drum. Provide to pass through the center of the suspended wire It can also be.

  Furthermore, the lighting baton lifting / lowering unit according to the present invention is provided with two pairs of branch pulleys, a rotary drive device having a pair of rotating drums and a guide pulley on the pedestal, and at least one pair of rotating drums, rotating on the pedestal. A detachable cover for accommodating the driving device and the guide pulley therein and a connecting means for attaching to the grid provided at the installation location can be provided.

  In the illumination baton lifting / lowering unit of the present invention, the direction of the rotation axis of the rotary drum is positioned in the direction in which the two pairs of branch pulleys face each other. In essence, it can fit within the dimensions of a rotating drum or rotary drive. For this reason, it can be installed at a relatively small interval compared to a conventional lifting device in which the direction of the rotation axis of the rotary drum is perpendicular to the direction in which the two pairs of branch pulleys face each other. The setting of lighting etc. can be performed more finely by narrowing the interval of. Moreover, since a plurality of hanging wires are used as a set, it is possible to prevent the hanging wires from being cut and the illumination baton from falling during use.

  Further, since the rotating drum moves in the direction of the rotation axis in response to the rotation, the hanging wire can be wound around the rotating drum without overlapping each other, and a combination of a male screw member and a female screw member. Thus, when the rotating drum makes one rotation, the rotating drum moves in the direction of the rotation axis by the thickness of the suspension wire, so that the suspension wire can be reliably aligned and wound in the direction of the rotation axis of the rotation drum. . Here, it is preferable that a winding groove is provided in a spiral shape on the surface of the rotating drum, and the suspension wire is wound along the winding groove when winding the suspension wire.

  Each suspension wire that has passed through the branch pulley can be turned in the direction of the circumferential surface of the winding part of each rotary drum by each guide pulley, so that it is ensured that the suspension wires will be entangled with each other. In addition, by attaching the rotating drums on both sides of the rotary drive device, it is possible to avoid the output shaft of the rotary drive device from becoming excessively long and causing the rotation blur of the output shaft, and the rotary drum to have a good balance. By being distributed, the durability can be enhanced.

  Mounting of the branch pulley, the rotary drive device including the rotating drum, and the guide pulley to the pedestal is performed by aligning the respective rotation shafts in the longitudinal direction or the short direction of the pedestal. It is possible to mount the fleet angle without adjusting it to set the fleet angle necessary for the operation, thereby significantly reducing the work time from manufacture to mounting on the grid.

  By providing a branch pulley, a rotary drive device equipped with a rotating drum, and a guide pulley on one pedestal, and connecting means for attaching to the grid on the pedestal, the entire lifting mechanism can be created as one unit. In addition, installation work can be performed simply by fixing the pedestal to the grid. As a result, work such as position adjustment between the branch pulley and the rotating drum, which has been conventionally required, can be made substantially zero, so that it can be installed at a lower cost. In addition, since the main movable part is covered with a detachable cover, it is possible to prevent inadvertent touching and injury and / or failure of the lifting mechanism.

  1-3 is a figure which each shows the front, plane, and side surface of the illumination baton raising / lowering unit 1 by the Example of this invention. The lighting baton lifting / lowering unit 1 of the present invention is usually used by being attached to a grid G provided by being suspended from a ceiling of a theater or a studio.

  The lighting baton lifting / lowering unit 1 according to the present invention has a base 10 having a frame shape or a plate shape (frame shape in the case of illustration) having a generally elongated rectangular planar shape. A rotary drive device 20 is provided at a substantially central position of the base 10 so as to be movable in the longitudinal direction, and two branch pulleys 30 are provided at both ends in the longitudinal direction of the base 10 so as to be separated from each other in the short direction.

  The rotary drive device 20 has an output rotary shaft 21 extending in both longitudinal directions. A rotary drum 40 is mounted on the output rotary shaft 21 on each side, and the two rotary drums 40 are rotated in the same direction by the rotary drive device 20. Is done. Each rotary drum 40 does not necessarily have to be partitioned by mechanical means such as a barrier, but two winding portions 41 are defined. Guide pulleys 50 are respectively provided at positions near the corresponding winding portions 41 of the rotary drum 40 in the longitudinal direction from the branch pulleys 30 of the base 10. One end of the suspension wire 60 is fixed to each winding portion 41 of the rotary drum 40, and the other end of the suspension wire 60 passes through the corresponding guide pulley 50 and branch pulley 30, and the illumination baton (suspended object) B. Are respectively fixed to the corresponding ends. A winding groove 42 is preferably formed on the outer peripheral surface of each rotary drum 40 in order to ensure that the winding of the suspension wire 60 is performed during the winding.

  One of the rotating drums 40 (left rotating drum in the case shown in FIG. 1) includes a moving member 70. As shown in FIGS. 1 and 2, the moving member 70 has a female screw member 71 extending from the outer end to the inner side at the rotation center position of the rotary drum 40, one end fixed to the base 10, and the other end rotating. The male screw member 72 extends on the rotation center line of the drum 40 and is screwed with the female screw member 71. Screw leads of the female screw member 71 and the male screw member 72 are formed so as to be substantially the thickness of the hanging wire 60. Thereby, when the rotating drum 40 makes one rotation, the rotating drum 40 moves together with the rotary drive device 20 by the thickness of the hanging wire 60 in the longitudinal direction.

  Generally, the rotational axis of each branch pulley 30 is arranged to extend in the short direction when viewed in a plane, and is parallel to the surface of the base 10 when viewed in the longitudinal direction.

  Each guide pulley 50 is disposed so as to be positioned at a short-side position with respect to a fixed position of the suspension wire to each winding portion 41 when the rotary drum 40 is in the winding start position. Each guide pulley 50 is also arranged so that its rotational axis is in the short direction when viewed in a plan view. However, when viewed in the longitudinal direction, each guide pulley 50 is an extension of its rotational center plane 51 as shown in FIG. Are arranged so as to be inclined (θ1, θ2) with respect to the surface of the pedestal 10 so as to pass through the center of the suspension wire 60 wound on the corresponding rotating drum 40 on the winding side. Here, in order to maintain the balance at the time of suspension by making the elongation ratio of each suspension wire 60 the same, from the guide pulley 50 located farther from the branch pulley 30 to the winding side of the corresponding rotary drum 40. It is preferable that the lengths of the suspension wires 60 are substantially the same by configuring the distance to be shorter than the distance from the guide pulley 50 on the closer side to the winding side of the rotary drum 40. .

  The length in the longitudinal direction of the pedestal 10 is usually substantially the same as the length of the illumination baton B, and the length in the short direction is the diameter of the rotating drum 40 or the dimension in the short direction of the rotary drive device 20. Therefore, the dimensions in the short direction can be reduced as compared with the conventional lighting baton lifting device. A protective cover 11 is detachably provided on the base 10, and a connecting member 12 for attaching to the grid G is provided on the bottom side thereof. The protective cover 11 is formed so as to cover the entire pedestal 10 as indicated by phantom lines in FIGS. 1 and 3, but from the viewpoint of workability at the time of maintenance and inspection, the rotary drive device 20, the rotary drum 40 and the guide are provided. It is preferable that only the cover portion that houses the pulley 50 is detachably attached. On the other hand, when considering the possibility of accidental touching by a person, the protective cover 11 needs to accommodate at least the rotary drive device 20, the rotary drum 40, and the guide pulley 50 therein. .

  Here, each rotary drum 40 is attached to each output rotary shaft 21 of the rotary drive device 20 so as to be movable along the rotary shaft, and a combination of the female screw member 71 and the male screw member 72 is provided in each rotary drum 40. it can. Thereby, since the relatively heavy rotary drive device 20 can be fixed and provided, the movement of the weight in the longitudinal direction can be suppressed. Further, the combination of the two female screw members 71 and the male screw member 72 can be provided in the opposite screw directions, so that the rotary drum 40 mounted on the same output shaft of the rotary drive device 20 can be provided. Since they can be moved in the longitudinally opposite direction, the balance in the longitudinal direction can always be kept uniform.

  The lighting baton lifting / lowering unit 1 of the present invention configured as described above is installed by fixing the pedestal 10 to the grid G by the connecting member 12 provided on the pedestal 10. The protective cover 11 has a protective function for preventing a person from touching carelessly, and also fulfills a dustproof function for a main part of a winding mechanism composed of movable parts.

  The lighting baton B is moved up and down by driving the rotation driving device 20 and rotating the rotating drum 40 to wind / rewind the hanging wire 60.

  When the rotary drum 40 is rotated by the rotary drive device 20, each suspension wire 60 passes through the branch pulley 30 and the guide pulley 50 and is wound / rewinded to the corresponding winding portion 41 of the rotary drum 40. . At this time, when the rotating drum 40 rotates once, the rotating drum 40 moves in the direction of the rotation axis by the thickness of the hanging wire 60, so that each hanging wire 60 has the winding groove 42. The hanging wire 60 can be surely aligned and wound around the winding portion 41.

  In the above description, the elevating unit of the present invention has been described as a device for raising and lowering the illumination baton. However, as apparent from the above, the suspended object is not limited to the illumination baton, and is substantially a mechanism. It can be used as a small-sized device that can raise and lower various articles without making a particular change.

It is a front view which shows the illumination baton raising / lowering unit by the Example of this invention. It is a top view of the illumination baton raising / lowering unit shown in FIG. It is an enlarged side view of the illumination baton raising / lowering unit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting baton raising / lowering unit 10 Base 11 Protective cover 12 Connecting member (U bolt)
DESCRIPTION OF SYMBOLS 20 Rotation drive apparatus 21 Output rotating shaft 30 Branch pulley 40 Rotating drum 41 Winding part 42 Winding groove 50 Guide pulley 51 Rotation center plane 60 Hanging wire 70 Moving member 71 Female screw member 72 Male screw member B Illumination baton (suspended object) ) G grid θ1, θ2 Inclination angle (with respect to the surface of the guide pulley base)

Claims (5)

  Two pairs of branch pulleys arranged horizontally apart from each other, a pair of rotary drums arranged between the two pairs of branch pulleys, a rotary drive device for rotating the rotary drum, and one end A suspension wire fixed to the rotating drum and the other end fixed to the lighting baton, and a guide pulley for directing each suspension wire moving through each branch pulley to the corresponding rotating drum. The pair of rotating drums has a rotating shaft in a direction opposite to the two pairs of branch pulleys, and the suspension wires pass through the branch pulleys and guide pulleys and are wound around the rotating drums. Lighting baton lifting / lowering unit to be rewound.   2. The illumination baton lifting / lowering unit according to claim 1, wherein at least one of the rotating drums has moving means for moving the rotating drum in the direction of the rotation axis in response to rotation of the rotating drum.   The moving means is a male screw member fixed so as to extend toward the rotation center of at least one rotary drum, and a male screw member provided so as to extend in the rotation axis direction of the rotary drum at the rotation center of the rotary drum. The pitch of the male screw member and the female screw member is such that when the rotary drum rotates once, the rotary drum moves in the direction of the rotation axis by the thickness of the suspended wire. The lighting baton lifting / lowering unit according to claim 2 formed as described above.   Each pair of branch pulleys is spaced apart from each other in a direction intersecting with the direction in which the two pairs of branch pulleys face each other, and the direction of the rotational axis of each branch pulley is located in the intersecting direction. Each of the rotary drums has a winding unit for winding / rewinding each suspension wire guided through each pair of branch pulleys, and the rotary drive device has a rotary drum on each side of the opposing direction. Each of the guide pulleys is disposed at a position near the winding portion in the opposite direction from each branch pulley, and the direction of the rotation shaft of each guide pulley is a direction orthogonal to the direction of the rotation shaft of the rotating drum, The lighting baton lifting / lowering unit according to claim 1, 2 or 3, wherein the extension of the rotation center plane of each guide pulley passes through the center of the suspension wire wound on the corresponding rotating drum.   The two pairs of branch pulleys, the rotary drive device and the guide pulley provided with a pair of rotary drums are provided on a pedestal, and at least the pair of rotary drums, the rotary drive device and the guide pulley are accommodated in the pedestal. The lighting baton raising / lowering unit according to any one of claims 1 to 4, further comprising a removable protective cover for mounting and a connecting member for mounting to a grid provided at an installation location.

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