JPH0526645Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is applicable to, for example, air dome baseball stadiums, stadiums, and other covered stadiums, as well as lifting and lowering devices for pedestals on which lighting devices and other equipment are mounted on the ceilings of stadiums. It is related to.

[Conventional technology]

Conventionally, air dome baseball stadiums, stadiums, and other covered stadiums and stadiums (hereinafter referred to as "stadiums, etc.")
The lighting equipment installed in stadiums, etc. is often a large number of floodlights and lighting equipment suspended from the ceiling or walls depending on the purpose of use and competition content in the stadium, etc., and regular maintenance and inspection of electrical wiring and equipment is required. At the same time, measures were taken to ensure that there would be no disruption to the competition due to light bulb disconnections or other malfunctions.

[Problem that the invention attempts to solve]

However, stadiums are themselves large-scale facilities, and lighting devices such as floodlights and lighting fixtures are installed on ceilings and walls that are extremely high above the grounds and floors. Although it is possible to work on lighting equipment suspended from the ceiling close to the wall using a catwalk installed on the wall, maintenance and inspection of many other lighting equipment requires Not only did it require special scaffolding, but it was also dangerous.

The present invention was devised in view of the above-mentioned problems, and when performing maintenance inspections on various equipment placed at high places, such as lighting equipment, the lighting equipment is lowered from the ceiling and work can be performed on the ground or floor. The purpose of this invention is to propose a gantry lifting and lowering device that can improve workability and contribute to work safety.

[Means for solving problems]

The gist of the pedestal elevating device according to the present invention is to suspend an elevating pedestal equipped with lighting equipment such as a floodlight and other equipment such that it can be raised and lowered from a support pedestal that is suspended and fixed on the ceiling side. It consists of a support pedestal that is fixedly suspended from the ceiling and an elevating pedestal that is suspended from the support pedestal so that it can be raised and lowered freely. An elevating mechanism suspended below the support frame, a suspension mechanism that hangs the elevating frame directly below the support frame, a connector that electrically connects the support frame side and the elevating frame side, and an elevating guide for the elevating frame relative to the support frame. This is a measure taken to construct a mechanism.

[Effect]

Therefore, when performing maintenance inspections on the lighting equipment and other equipment, the elevating frame can be lowered by remote control, if desired, and necessary work on the equipment can be performed on the ground or floor.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a gantry lifting device according to the present invention will be described with reference to the drawings.

The gantry lifting device according to the present invention includes a support pedestal 1 that is suspended and fixed to a ceiling surface a or a frame b disposed close to the ceiling surface a, and a plurality of projectors that can be raised and lowered with respect to the support mount 1. and lighting equipment 2,2
... It is composed of an elevating frame 3 equipped with other lighting devices. Furthermore, the lighting devices 2, 2, etc. installed on the elevating pedestal 3 can adjust their respective projection directions depending on the illumination area in the stadium, etc. In this embodiment, the elevating pedestal 3 The frame 30 constituting the frame 30 is arranged with its front side 30a and rear side 30b in vertical positions, and the upper and lower rows of lighting fixtures 2, 2... are mutually arranged, and each of the lighting fixtures 2, 2... The illumination area can be expanded by adjusting and changing the projection direction.

The support pedestal 1 is suspended from wires 9, 9 fixed to the ceiling surface a or a frame b disposed close to the ceiling surface a at one end side at least in two places on the left and right sides thereof, and is raised and lowered from the upper or lower surface thereof. Frame 3
It comprises an elevating mechanism 4 and a suspension mechanism 5 for suspending and connecting, a connector 7 for electrical connection with the elevating pedestal 3, and an elevating guide mechanism 8 for the elevating pedestal 3.

That is, in this embodiment, the elevating mechanism 4 is arranged on the upper surface of the approximately central part of the support frame 1, and is rotatably driven by a brake motor 40 that is configured to generate an electrical or mechanical load in a predetermined rotational direction. A winch consisting of a pair of drums 41, 41 is used to wind up wires 42, 42 extending from the left and right drums 41, 41 in the left and right direction of the support frame 1, and the wires 42, 42 are connected so that they can be unwound freely. The wires 42, 42 are connected to the support frame 1 via sheaves 43, 43 disposed on the left and right upper edges of the support frame 1.
It hangs downward from the left and right edges of the frame 3, and its ends are connected to the left and right edges of the elevating frame 3.
For convenience of explanation, the sheave 43 on one side having the same configuration will be described in more detail.The sheave 43 includes a slack detection fitting 4 for detecting slack in the wire 42.
Add 4. That is, this slack detection metal fitting 44 is
Rewind the wire 42 from the winch and lift the elevating frame 3
This is to prevent the wire 42 from falling out of the guide groove 43a formed on the outer periphery of the sheave 43 due to overdrive of the winch when the wire 42 is lowered. One side of the rollers 45a and 45b for preventing the wire 42 from coming off is rotatably supported on the shaft support of the roller 45a placed above the sheave 43, and the other side is used as a free end. The free end is configured to be freely rotatable in the vertical direction, and a roller 46 that abuts from above the wire 42 is attached to the other side, that is, the free end side, and the roller 46 is normally held by tension springs 47, 47. is pressed onto the wire 42, and
A limit switch 48 is arranged below the slack detection fitting 44 at an appropriate interval. When the elevating frame 3 is lifted, the other side of the slack detection fitting 44 is separated from the limit switch 48 by the tensile force of the wire 42, but when the elevating frame 3 is lowered, the wire 42 is further moved to overdrive the winch. When slack is generated, the other end of the slack detection fitting 44, which is tensioned by the tension springs 47, 47, rotates downward and comes into contact with the limit switch 48 to operate the limit switch 48, which activates the winch brake motor. Turn on the power on the 40 side and apply braking.

The suspension mechanism 5 hooks a hanging rod 10 configured on the side of the lifting pedestal 3 and attaches the lifting pedestal 3 to the lower surface of the support pedestal 1.
It is constructed of a hook 50 that engages with the hanging rod 10 and a drive device 51 that rotates the hook 50. That is, the hook 50 is rotatably supported by a shaft 52 on the support frame 1 at the upper end side, and an arm 53 that projects in a predetermined direction from the shaft support 52 is formed integrally or integrally with the hook 50, In addition, the lower end side is made to hang down toward the lifting frame 3 side, and a hook portion 50a is formed at the tip thereof, and a spring 54 stretched between the support frame 1 and the hook portion 5
By biasing the arm 0a in the direction in which it engages with the locking rod 10, the rotating force applied to the tip of the arm 53 using the shaft support 52 as a fulcrum can be converted into the rotating force of the hook 50. A drive device 51 that rotates this hook 50 includes the arm 53 on its outer periphery and a roller 53 configured at its tip.
It is equipped with a cam 55 that is in sliding contact with the cam 55 via a and a ratchet wheel 57 that is fixed on the same shaft as the cam 55, and the shaft 56 further sandwiches the cam 55 and the ratchet wheel 57. 57 protrudes obliquely downward,
A pair of swinging arms 59, 59 each having a roller 58 at its tip are rotatably pivoted about a shaft 56. The contour of the cam 55 is determined by a structure in which four convex surfaces 55a and four concave surfaces 55b are alternately arranged at approximately equal intervals all around the circumference.
5b are arranged symmetrically in the diametrical direction at 90 degree intervals, and the arm 53 on the hook 50 side engages the joint edge 55c between the convex surface 55a and the concave surface 55b from the side within a predetermined rotation range. It is configured as an engaging edge that can be hooked and cooperated with the roller 53a formed at the tip. Therefore, when the arm 53 is in contact with the concave surface 55b of the cam 55 via its roller 53a,
A hook 50 biased by a spring 54 is placed in a vertically hanging position, and when the cam 55 rotates in the direction of arrow A in the figure, the arm 53 is pressed against the joint edge 55c, and the roller 53a rides over the joint edge 55c. The hook 50 rotates in the direction of arrow B to a position where it moves onto the convex surface 55a, and at the same time, the hook 50 begins to rotate from the vertical direction in the direction of arrow C. Further, the ratchet wheel 57 prevents the cam 55 from reversing, and also prevents the elevating frame 3
The cam 55 has a structure that rotates within a predetermined rotation angle in response to one vertical movement, and has a plurality of convex surfaces 55a formed on the outer circumferential surface of the cam 55.
and a plurality of claws 57a corresponding to the concave surface 55b. The plurality of pawls 57a rotate intermittently and rotate the cam 55 between its convex surface 55a and concave surface 55b.
are arranged in correspondence with the cam 55 so as to alternately engage with the arm 53 on the side of the hook 50 and rotate it in a predetermined direction, and the free end side swings the pushing pawl 60 protruding in the feeding direction of the ratchet wheel 57. It is pivotally supported at a predetermined portion of the arms 59, 59, and is constantly pressed and biased from the swing arm 59, 59 side to the ratchet wheel 57 side by a spring 61, and is pivotally supported on the support frame 1 side, and its tip is connected to the above-mentioned push pawl. Push pawls 62 are provided to engage with each pawl 57a of the ratchet wheel 57 from the opposite direction to prevent the ratchet wheel 57 from reversing. Thus, each time the elevating pedestal 3 moves up and down, the pushing pawl 60, which is linked to the arms 59, 59 that contact the engagement plate 31 on the elevating pedestal 3 side via the roller 58, moves the ratchet wheel 57 by one pawl 57a. A cam 55 that is pushed up and rotated and fixed on the same shaft 56
At the same time, the arm 53 on the hook 50 side, which is engaged with the concave surface 55b of the cam 55, is rotated to the joint edge 5.
5c and rotate the hook 50 until the hook 50a of the hook 50 releases the hook 10. At this time, arm 53 is
The free end side of the cam 55 is moved to a position where it comes into contact with the convex surface 55a of the cam 55, and the push pawl 62 engages with the pawl 57a of the ratchet wheel 57 to stop its reverse rotation, and the shaft 5
A reversal prevention mechanism (not shown) constructed on the arm 53 itself acts to maintain the engaged posture of the arm 53 and the cam 55. On the other hand, arm 59,5
9 is lowered to the position before the above operation in response to the lowering operation of the elevating frame 3, and at the same time, the push pawl 60 is moved to the ratchet wheel 57.
The next claw 57a can be engaged with the next claw 57a.

In addition, in this embodiment, a plurality of sensors are attached, which serve as switches for safety devices that detect each operating state during the operation of the device and stop the operation of each part or issue an alarm. This is a pedestal elevation detection switch that detects excessive elevation of the pedestal 3, and consists of two emitter switches 64, 64 arranged opposite to one movable shaft 65 to enable double sensing. The limit switch 67 that detects the operation is a press switch that detects the state in which the hook 50 has latched the latching rod 10. 64 of these limit switches,
Of course, 66 and 67 can be modified using other conventionally known switches. still,
Reference numeral 68 is a connecting rod that interlocks a pair of hooks 50, 50 arranged on the left and right sides of the support frame 1.

The connector 7 electrically connects the support pedestal 1 and the elevating pedestal 3 side that moves up and down relative to the support pedestal 1, and connects an upper coupler 70 placed on the support pedestal 1 side and an upper coupler 70 placed on the elevating pedestal 3 side. A lower coupler 71 is provided, and the upper coupler 70 is supported at the lower end of a pantograph 72 whose upper end side is supported by the support frame 1, and can be moved up and down by, for example, extending and contracting a hydraulic cylinder 73. 71
is arranged on the elevating pedestal 3 at a position opposite to the upper coupler 70. Therefore, when the elevating frame 3 moves up and down, the upper and lower couplers 7
0,71 is the one that connects and disconnects. Further, the upper coupler 70 absorbs the impact of contact with the lower end of the pantograph 72 within a predetermined stroke range when the lower coupler 71, that is, the elevating frame 3 is raised,
A plurality of springs 74 interposed in the support portion for the pantograph 72 constantly press the joint portion to the lower coupler 71 with a predetermined elastic force to strengthen the joint force between the two. Furthermore, the lower coupler 71 is placed on the elevating frame 3 and is configured to be movable in the horizontal direction within a predetermined range. It is tensioned toward the outer circumferential direction and supported in a balanced manner. Note that the upper and lower couplers 70 and 71 may be provided with a guide mechanism for easily fitting them together. The illustrated example shows one example,
Guide 7 that opens upward in a funnel shape on the lower coupler 71 side
6 and 76 are provided, and pins 77 and 77 for insertion into and removal from the guides 76 and 76 are provided on the upper coupler 70 side. Guide 7 on this lower coupler 71 side
6 and 76 have their receiving openings opened in a funnel shape upwards, that is, toward the pins 77 and 77 as described above, so that the lower coupler 71 is on the elevating frame 3 and is slightly sliding in the horizontal direction. Also, the pin 7 is inserted within the diametrical range of the funnel-shaped openings 76a, 76a.
7,77 can be accepted.

The elevating guide mechanism 8 includes a guide 8 provided with a funnel-shaped opening 80a facing downward and arranged on the side of the support frame 1.
0 and its funnel-shaped opening 8 facing the guide 80.
It is composed of an insertion/extraction pin 81 arranged and erected on the side of the elevating pedestal 3, which performs an insertion/extraction operation toward 0a. This elevating guide mechanism 8 can be provided one or more depending on the size of the gantry elevating device according to the present invention, and by changing the diameter length of the funnel-shaped opening 80a of the guide 80. In response to the inclination and shaking of the support frame 1 and the elevating frame 3, the latching operation of both can be facilitated.

Next, the operation of the gantry lifting device according to the present invention will be explained.

In the normal use state of the gantry elevating device according to the present invention, the elevating gantry 3 is hung on the lower surface of the support gantry 1 by hooks 50, 50, and suspended.
The elevating pedestal 3 is lowered by remote control when performing maintenance inspections or replacing light bulbs of the lighting equipment 2, 2, . . . . That is, when a predetermined lowering operation signal is issued as desired, the winch of the elevating mechanism 4 operates to lower the elevating frame 3 within a predetermined range. Then, the hanging rod 10 on the elevating frame 3 side moves above the hook portion 50a formed at the lower end of the hook 50 to release the hook 50, and the engagement plate 31 on the elevating frame 3 side also moves to this position. The swinging arms 59, 59 are rotated via the rollers 58 in contact with each other, and the ratchet wheel 57 is rotated with one pawl 5.
The cam 5 is rotated by 7a, and the cam 5 is linked to this rotation.
5, after a slight time delay, the hook 50 is moved from the vertical stop position in the direction of arrow C, that is, its hook 50.
Rotate it in the direction in which a is removed from the hanging rod 10. When the brake motor 40 of the winch stops in this state, the elevating frame 3 will be suspended from the wires 42, 42 wound around the drums 41, 41, and will descend under the control of the brake motor 40 due to its own weight. Start operation. This lowering operation stops on the ground surface or the floor surface at a preset timing. If the lowering operation does not stop for some reason at this time, the slack detection fitting 44 that detects the slack of the wires 42, 42 operates and applies braking to the brake motor 40, and the lowering operation of the elevating frame 3 is stopped. to stop. After completing the desired work, give a rising motion signal,
The brake motor 40 rotates, winding the wires 42, 42 around the drums 41, 41, and raises the elevating frame 3. Therefore, the engagement plate 30 on the elevating frame 3 side
engages with the rollers 58 on the swinging arms 59, 59 side and rises within a predetermined range, that is, when the hanging rod 10 on the elevating frame 3 side rises above the rotational position of the hook portion 50a of the hook 50, the swinging The movable arms 59, 59 rotate,
The ratchet wheel 57 is rotated by one pawl 57a, and the cam 55 is rotated at the same time, thereby moving the convex surface 55a engaged with the arm 53 on the hook 50 side.
Therefore, the arm 53 comes to engage with the concave surface 55b while sliding on the surface of the cam 55, and the shaft 52
The hook 50 is rotated in the vertical direction using as a fulcrum. Thereafter, when the rotation of the brake motor 40 is stopped and the elevating frame 3 is lowered, the hanging rod 10 is placed on and engaged with the hook portion 50a of the hook 50, so that the elevating frame 3 is suspended below the support frame 1. Become.

Note that the devices to be installed on the elevating frame 3 do not necessarily have to be floodlights, lighting fixtures, and other lighting devices, but rather devices and equipment that need to be placed at a high place and undergo maintenance inspections and other operations as desired. It is also possible to modify it as a stand equipped with.

[Effect of idea]

Since the gantry elevating device according to the present invention is configured as described above, it is possible to raise and lower only the gantry placed on the ceiling or wall of a stadium or the like by remote control. Not only can it be lowered to perform desired and necessary work, but it also has excellent practical effects after implementing this invention, such as being able to perform work safely and reliably without installing special scaffolding. ing.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the structure of the pedestal lifting device according to the present invention, Fig. 2 is a side view, Fig. 3 is a front view of the support pedestal, Fig. 4 is a plan view, and Fig. 5 is the elevating mechanism. 6 is an enlarged plan view, FIG. 7 is an enlarged front view of the sheave section, FIG. 8 is an enlarged right side view, FIG. 9 is an enlarged front view of the suspension mechanism, and FIG. 10 is an enlarged front view of the suspension mechanism. is a side view taken from the line X-X in Figure 9, Figure 11 is a side view taken from the line XI-XI in Figure 9, Figure 12 is an enlarged front view of the connector, and Figure 13 is an enlarged side view. 14 are enlarged front views of the elevating guide mechanism. 1... Support frame, 2, 2... Lighting equipment, 3...
Elevating frame, 4... Elevating mechanism, 5... Suspension mechanism, 7
... Connector, 8 ... Lifting guide mechanism, 9,9...
...Wire.

Claims (1)

[Scope of Claim for Utility Model Registration] A gantry elevating device comprising a support pedestal, an elevating pedestal, an elevating mechanism, a suspension mechanism, a connector, and an elevating guide mechanism, wherein the supporting pedestal is arranged on a ceiling surface or close to the ceiling surface. The above-mentioned elevating frame has a front frame and a rear frame arranged vertically, and the upper and lower rows of lighting fixtures are suspended from each other and each other. The lighting device is constructed so that the illumination area can be expanded by adjusting and changing the projection direction of each lighting device, and is suspended from the support frame so as to be able to rise and fall freely, and the elevating mechanism The elevating pedestal is suspended below the supporting pedestal via multiple wires stretched from the supporting pedestal side to the elevating pedestal side, and the elevating pedestal is placed on the upper surface of the approximately central part of the supporting pedestal, and electrical or mechanical The winch is rotatably driven by a brake motor configured to generate a large load, and the wire stretched in the left and right directions of the support frame is connected so as to be able to be wound up or unwound. It consists of a hanging rod configured on the side of the lifting pedestal, and a hook for hanging the lifting pedestal on the underside of the support pedestal by hooking the hanging rod, and the hook is rotated freely by a drive device. The above connector consists of an upper coupler placed on the support frame side and a lower coupler placed on the elevating frame side, with the upper coupler supported at the lower end of the pantograph configured as the support frame, and the lower coupler The lifting guide mechanism includes a guide having a generally funnel-shaped opening facing upward, and an insertion/extraction operation opposite to the guide. A gantry lifting device characterized by comprising an insertion/extraction pin arranged and erected on the lifting gantry side so as to allow the lifting gantry to move.