JPH0546165Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is applicable to, for example, air dome baseball stadiums, stadiums, and other covered stadiums, and for lifting and lowering frames on which lighting devices and other equipment installed on the ceiling of stadiums are mounted. The present invention relates to an apparatus, and particularly to a suspension mechanism for removably suspending a pedestal to be raised and lowered.

[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. often has a large number of floodlights and lighting equipment suspended from the ceiling or walls depending on the purpose of use and competition content at 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.

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 does it require special scaffolding, but it also poses operational hazards.
A method has been proposed in which the entire pedestal of the lighting device is raised and lowered.

[The problem that the idea attempts to solve]

However, if the pedestal to be raised and lowered is not securely suspended from the ceiling, it can be very dangerous, such as when the air dome unexpectedly shakes due to strong winds such as a typhoon, it may fall and cause an accident. have. Therefore, in order to move the gantry up and down, there is a need for a structure in which the gantry does not need to be fixed to a support pedestal on the ceiling side, and a more reliable means for suspending the gantry from the ceiling side.

The present invention was devised in view of the above problem, and when performing maintenance inspections on various equipment such as lighting devices that are constantly suspended from the ceiling, the lighting devices, etc. are lowered from the ceiling and placed on the ground or on the floor. By making it possible to perform work on the ceiling, it is possible to improve the work efficiency and contribute to the safety of work on the lighting equipment, etc., and also to ensure that the lighting equipment, etc. can be attached and removed from the ceiling surface. The object of the present invention is to propose a suspension mechanism for a gantry elevating device that can be freely suspended.

In order to achieve the above object, the suspension mechanism of the gantry lifting device according to the present invention consists of a support pedestal fixedly suspended from the ceiling and an elevating pedestal suspended from the support pedestal so as to be able to rise and fall freely. The elevating pedestal is suspended under the supporting pedestal by a plurality of wires stretched from the side to the elevating pedestal side, and the supporting pedestal side and the elevating pedestal side are electrically disconnected via a connector, In the pedestal elevating device which constitutes an elevating and lowering guide mechanism for the elevating pedestal with respect to the support pedestal, the upper end side of the hook is rotatably supported on the lower surface of the support pedestal, and an arm protruding from the pivot support in a predetermined direction is attached to the pedestal. An elastic member such as a spring, which is formed integrally or integrally with a hook, has the lower end of the hook hanging down toward the lifting frame, has a hook portion at the tip, and is stretched between the hook and the support frame. The hook part is constantly biased in the direction of engagement with a hook bar provided on the side of the lifting platform, and the rotational force applied by the drive device to the tip of the arm can be converted into the rotational force of the hook using the shaft support as a fulcrum. The gist of the present invention is that the hook part of the hook is hooked on the hanging rod to detachably suspend the elevating frame.

[Effect]

Therefore, when performing maintenance and inspection 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.

In addition, since the hook of the hook rotated by the drive device is urged toward the hanging rod of the lifting pedestal by an elastic member, by engaging this hook with the hanging rod, the lifting pedestal can be reliably moved. It can be hung and
By moving this hanging rod above the hook and releasing the hook, the elevating frame can be lowered.

〔Example〕

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

As shown in FIGS. 1 to 3, the pedestal elevating device constituting the suspension mechanism according to the present invention is a support pedestal that is suspended and fixed to a ceiling surface a or a frame b disposed close to the ceiling surface a. 1, and an elevating pedestal 3 that can be raised and lowered with respect to the support pedestal 1 and is equipped with a plurality of floodlights and lighting equipment 2, 2... and other lighting devices.
It consists of: In addition, the lighting devices 2, 2... 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 is The front side 30a and rear side 30b of the constituent frame 30 are arranged in vertical positions, and the upper and lower rows of lighting fixtures 2, 2... are mutually arranged, and each lighting fixture 2, 2... is arranged in its projection direction separately. It is possible to expand the illumination area by changing the adjustment.

The support pedestal 1 is suspended from wires 9, 9 fixed at one end side, at least in two places on the left and right sides, to a ceiling surface a or a frame b disposed close to the ceiling surface a. A lifting mechanism 4 and a suspension mechanism 5 for suspending and connecting the lifting frame 3 to the upper or lower surface of the support frame 1, a connector 7 for electrical connection between the lifting frame 3, and a lifting guide mechanism 8 for the lifting frame 3 are installed. consists of

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. Using a winch consisting of a pair of drums 41, 41, wires 42, 42 stretched from the left and right drums 41, 41 in the left and right direction of the support pedestal 1 are wound up and connected so as to be unwound. 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 sides of the elevating frame 3.

Note that the sheave 43 may be provided with a slack detection fitting (not shown) for detecting slack in the wire 42.

As shown in FIGS. 4 to 6, the suspension mechanism 5 suspends the elevating pedestal 3 from the lower surface of the supporting pedestal 1 by hooking a hanging rod 10 constructed on the side of the elevating pedestal 3. , a hook 50 that engages with the hanging bar 10;
It is composed of a drive device 51 that rotates this 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, The lower end side is made to hang down to the elevating frame 3 side, and a hook part 5 is attached to the tip.
0a, the hook portion 50a is always biased in the direction of engagement with the hanging rod 10 by a spring 54 stretched between it and the support frame 1, and the arm 53 The rotational force applied to the tip of the hook 50 can be converted into the rotational force of the hook 50.

The drive device 51 that rotates this hook 50 is
The cam 5 slides into contact with the arm 53 at its outer peripheral portion via a roller 53a formed at its tip.
5 and a ratchet wheel 5 fixed on the same shaft 56 as the cam 55
7, and the shaft 56 further includes a cam 55.
and a ratchet wheel 57, and protrude diagonally downward to the side of the cam 55 and ratchet wheel 57, and a pair of swinging arms 59, 59 having a roller 58 at the tip are rotatable about the shaft 56. It is a pivot point. Above cam 5
The outline of 5 is formed by 4 arranged at approximately equal intervals all around the circumference.
This is determined by a structure in which convex surfaces 55a and concave surfaces 55b are arranged alternately, and in this embodiment, the convex surfaces 55a and concave surfaces 55b are arranged symmetrically in the diametrical direction at 90 degree intervals, and the convex surfaces 55a
The hook 50 engages the connecting edge 55c between the and the concave surface 55b from the side within a predetermined rotation range.
It is configured as an engaging edge that can be hooked on and work together with a roller 53a formed at the tip of the side arm 53.

Therefore, when the arm 53 is in contact with the concave surface 55b of the cam 55 via its roller 53a, the hook 50, which is biased by the elastic member 54 such as a spring, is placed in a vertically hanging position, and the cam 5
5 rotates in the direction of arrow A in the figure, the arm 53 is pressed against the joining edge 55c, and the roller 53a rotates in the direction of arrow B to a position where it moves over the joining edge 55c and onto the convex surface 55a, and at the same time, the hook 50 is vertically moved. direction, and rotates in the direction of arrow C.

The ratchet wheel 57 has a structure that prevents the cam 55 from reversing and also rotates within a predetermined rotation angle in response to one lifting/lowering operation of the elevating frame 3. It has a plurality of claws 57a corresponding to a plurality of convex surfaces 55a and concave surfaces 55b formed on the outer periphery. The plurality of pawls 57a rotate intermittently, and the cam 55 is arranged in correspondence with the cam 55 so that its convex surfaces 55a and concave surfaces 55b alternately engage the arm 53 on the hook 50 side and rotate it in a predetermined direction. A pushing pawl 60 whose free end side protrudes in the feeding direction of the ratchet wheel 57 is pivotally supported at a predetermined portion of the swing arms 59, 59, and a spring 6
1, the ratchet wheel 5 is constantly moved from the swing arm 59, 59 side.
7 side, and is pivotally supported on the support frame 1 side, and its tip is engaged with each pawl 57a of the ratchet wheel 57 from the side opposite to the pushing pawl 60 to prevent the ratchet wheel 57 from reversing. A pushing pawl 62 is provided to do so.

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. At the same time, the cam 55 fixed on the same shaft 56 is rotated, and at the same time, the roller 53a formed at the tip of the arm 53 on the hook 50 side, which is engaged with the concave surface 55b of the cam 55, is attached to the joint edge 55c. The hook 50 is hooked and rotated, and the hook 50 is rotated to a position where the hook portion 50a of the hook 50 releases the hanging rod 10. At this time, the roller 53 configured at the tip of the arm 53
a is moved to a position where its free end comes into contact with the convex surface 55a of the cam 55, and the push pawl 62 is brought into contact with the ratchet wheel 5.
The arm 53 and the cam 55 are engaged with the claw 57a of the shaft 56 to prevent the reverse rotation, and a reverse rotation prevention mechanism (not shown) formed on the shaft 56 itself acts to prevent the arm 53 and the cam 55 from rotating.
The engaged posture is maintained. On the other hand, arm 5
9 and 59 are lowered to the positions before the above-mentioned operation in response to the lowering movement of the elevating frame 3, and at the same time, the pushing pawl 60 can be engaged with the next pawl 57a of the ratchet wheel 57.

In this embodiment, safety device switches 63, 64, and 6 detect each operating state during operation of the device and stop the operation of each part or issue an alarm.
A plurality of sensors such as 5, 66, 67, etc. can be attached. Note that 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.

In addition, the connector 7 electrically connects the support pedestal 1 and the elevating pedestal 3 side that moves up and down with respect to the support pedestal 1, and connects the upper coupler placed on the support pedestal 1 side to the elevating pedestal 3 side. The upper coupler is supported at the lower end of a pantograph whose upper end side is supported by the support pedestal 1, and the elevation guide mechanism 8 is arranged on the support pedestal 1 side and directed downward. a guide having a funnel-shaped opening;
It is composed of an insertion/extraction pin placed upright on the side of the elevating pedestal 3, which faces the guide and is inserted/extracted toward the funnel-shaped opening.

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

In the suspension mechanism of the gantry lifting device according to the present invention, in normal use, the lifting gantry 3 is hung on the lower surface of the support gantry 1 with hooks 50, 50, and is used for maintenance inspection and lighting. Instrument 2, 2...
The lifting platform 3 can be lowered by remote control when replacing a light bulb or the like.

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. As a result, the hanging rod 10 on the elevating pedestal 3 side moves above the hook portion 50a formed at the lower end of the hook 50, and the engagement plate 31 on the elevating pedestal 3 side also moves through the roller 58 that comes into contact with it. to rotate the swinging arms 59, 59, rotate the ratchet wheel 57 by one pawl 57a, and after a slight delay due to the cam 55 linked to this rotation, the hook 50 is moved from the vertical stop position in the direction of arrow C. That is, the hook 50 is released by rotating the hook portion 50a in a direction in which it is removed from the hooking rod 10. When the brake motor 40 of the winch stops in this state, the elevating frame 3 is suspended from the wires 42, 42 wound around the drums 41, 41, and begins to descend under the control of the brake motor 40. This lowering operation stops on the ground surface or the floor surface at a preset timing.

After completing the desired work, when a rising operation signal is issued, the brake motor 40 rotates and the drum 4
1 and 41, and the elevating frame 3 is raised. Thus, the engagement plate 31 on the elevating frame 3 side is connected to the roller 5 on the swing arm 59, 59 side.
8 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 arms 59, 59
rotates, causing the ratchet wheel 57 to rotate by one pawl 57a, and at the same time, the cam 55 rotates, thereby moving the convex surface 55a engaged with the arm 53 on the hook 50 side. Therefore, the roller 53a formed at the tip of the arm 53 comes to engage with the concave surface 55b while sliding on the surface of the cam 55, and rotates the hook 50 in the vertical direction about the shaft 52 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 equipment to be installed on the elevating frame 3 does not necessarily have to be floodlights, lighting equipment, or other lighting equipment, but rather equipment and equipment that must be placed at a high place and can be maintained and inspected or other operations performed as desired. It is also possible to modify it as a stand equipped with.

[Effect of idea]

Since the suspension mechanism of the gantry lifting device according to the present invention is constructed as described above, only the gantry placed at a high place such as the ceiling or wall of a stadium can be moved up and down by remote control. Not only can the desired work be done by lowering it onto the floor, but the work can also be done safely and reliably without the need for special scaffolding.

In addition, since the hook of the hook that is rotated by the drive device is biased by an elastic member toward the hanging rod of the elevating pedestal, by engaging this hook with the latching rod, the elevating pedestal can be reliably moved. This invention has excellent practical effects after implementation, such as being able to be suspended, and also being able to lower the elevating frame by moving the hanging rod above the hook and releasing the hook. There is.

[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, and FIG. 4 is an enlarged front view of the suspension mechanism.
FIG. 5 is a side view taken from the line shown in FIG. 4, and FIG. 6 is a side view taken from the line shown in FIG. 4. 1... Support frame, 2, 2... Lighting equipment, 3...
Elevating frame, 4... Elevating mechanism, 5... Suspension mechanism, 7
...Connector, 8...Elevating guide mechanism, 9,9...
... Wire, 10 ... Hanging bar, 50 ... Hook, 5
0a...Hook portion, 51...Drive device, 52...Spindle support, 53...Arm, 54...Elastic member.

Claims (1)

[Scope of Claim for Utility Model Registration] Consisting of a support pedestal fixedly suspended from the ceiling and an elevating pedestal suspended from the support pedestal so as to be able to rise and fall freely, a plurality of wires are stretched from the support pedestal side to the elevating pedestal side. The elevating pedestal is suspended under the supporting pedestal so that it can be raised and lowered, and the supporting pedestal side and the elevating pedestal side are electrically connected and disconnected via a connector, and a mechanism for guiding the elevating pedestal relative to the supporting pedestal is constructed. In the pedestal lifting device, the upper end of the hook is rotatably supported on the lower surface of the support pedestal, and an arm protruding from the pivot in a predetermined direction is formed integrally or integrally with the hook, and The lower end of the hook hangs down toward the lifting frame, and the hook has a hook at its tip, and the hook is constantly provided on the lifting frame using an elastic member such as a spring stretched between the hook and the supporting frame. biased in the direction of engagement with the
The structure is configured such that the rotational force applied by the drive device to the tip of the arm can be converted into the rotational force of the hook using the shaft support as a fulcrum, and the hook is raised and lowered by hooking the hook to the hanging rod. 1. A suspension mechanism in a gantry lifting device, characterized in that the gantry is configured to be detachably suspended.