Mobile maintenance ladder for theater stage

Abstract

The utility model discloses a mobile maintenance ladder for a theater stage, and belongs to the technical field of operation tools. The maintenance ladder comprises two climbing ladder bodies, a standing platform and a base. The upper ends of the two climbing ladder bodies are connected with the standing platform, and the lower ends are fixedly connected with the base; a limiting rod is arranged between the two bases; universal wheels are arranged on the lower portions of the bases, a transversely-arranged universal wheel is arranged on the outer side of one base, and a transversely-arranged universal wheel is arranged on the side, corresponding to the base provided with the transversely-arranged universal wheel, of the standing platform. The maintenance ladder can be conveniently moved on a stage to assist high-altitude operation. When the ladder is not used, the bases can be folded, and the two bases are folded adjacently, so that the occupied space during storage is reduced. The fence is arranged on the edge of the standing platform at the top of the ladder, so that the high-altitude operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tools, in particular to a movable maintenance ladder for a theater stage. Background Art

[0002] The stage of a theater generally has a relatively high height, and lights, scenery or screens are generally arranged on the upper part or the top of the stage. Since the content of each performance is different, the lights and scenery used are also different. Therefore, before each performance, the lights, sound of the stage need to be debugged and the scenery needs to be set up. These operations need to be carried out at a certain height. In addition, the lights or screens on the stage will inevitably have certain faults, so it is also necessary to climb high for maintenance. Generally, a ladder is used for climbing operations, but a single ladder body cannot complete the operation in some scenarios. For example, replacing a light bulb in the center of the stage top. And using a mechanically automated ladder is too costly. Therefore, designing a ladder that is convenient for working on a theater stage has become an urgent requirement. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to design a ladder applicable to theater stage operations that is convenient to move, easy to store and reduces the occupied space.

[0004] The technical solution for the technical problem to be solved by the utility model is: a movable maintenance ladder for a theater stage, including two climbing ladder bodies, a standing platform and a base; the upper ends of the two climbing ladder bodies are connected to the standing platform, and the lower ends are fixedly connected to the base; a limiting rod is arranged between the two bases; universal wheels are arranged at the lower part of the base, and a horizontally arranged universal wheel is arranged on the outside of one of the bases, and a horizontally arranged universal wheel is arranged on the side of the standing platform corresponding to the base with the horizontally arranged universal wheel.

[0005] Preferably, the limiting rod is divided into two hinged sections, namely a first limiting rod and a second limiting rod; the first limiting rod and the second limiting rod are respectively hinged to the bases on both sides.

[0006] Preferably, a fence is arranged on the outer periphery of the standing platform, and a swing door is arranged on the side of the fence corresponding to the climbing ladder body.

[0007] Preferably, fences are respectively hinged on both sides of the standing platform, and each fence includes two foldable sections.

[0008] Preferably, the fence is in a flat plate shape.

[0009] Preferably, the universal wheels are provided with locking mechanisms.

[0010] Preferably, the first limiting rod or the second limiting rod is a telescopic rod.

[0011] Preferably, a plurality of hinge shaft insertion holes are provided on the first limiting rod and the second limiting rod.

[0012] Preferably, a pull rope is connected to the hinged end of the first limiting rod or the second limiting rod, and the other end of the pull rope is connected to the middle of the climbing ladder body.

[0013] The beneficial effects of the present utility model are as follows: 1. Universal wheels are provided, which are convenient for moving on the stage, and a brake pedal is provided for the universal wheels to ensure safety. 2. When the ladder is not in use, the base can be retracted, and the two bases are stacked adjacent to each other, reducing the space occupied during storage. 3. A fence is provided at the edge of the standing platform at the top of the ladder to improve safety during high-altitude operations. Description of the Drawings

[0014] Figure 1 It is the front view of an embodiment of the present utility model.

[0015] Figure 2 It is the side view of an embodiment of the present utility model.

[0016] Figure 3 It is the schematic diagram of the base of an embodiment of the present utility model.

[0017] In the figure: 210, fence; 310, limiting rod; 300, base; 200, standing platform; 100, climbing ladder body; Detailed Embodiments

[0018] In order to make the technical solutions and beneficial effects of the present utility model clearer, the following further detailed explanations are made on the embodiments of the present utility model.

[0019] The theater stage mobile maintenance ladder includes two climbing ladders 100, a standing platform 200, and a base 300. The climbing ladder 100 is the simplest ladder structure, including two vertical long rods and several cross bars arranged between the two long rods. The standing platform 200 is arranged at the top, providing a standing space for maintenance personnel. The standing platform 200 can be set as a rectangular platform. When the standing platform 200 is a rectangular platform, the upper ends of the two climbing ladders 100 are respectively connected to two opposite sides of the standing platform 200. For example, one climbing ladder 100 is connected to the front edge of the standing platform 200, and the other climbing ladder 100 is connected to the rear edge of the standing platform 200. Preferably, for the convenience of storage, the edges of the climbing ladder 100 and the standing platform 200 are hinged. The lower part of the base 300 is provided with universal wheels to facilitate the movement of the entire maintenance ladder. There are two bases 300, and the two bases are respectively fixedly connected to the lower ends of the two climbing ladders 100. A limiting rod 310 is arranged between the two bases 300. The limiting rod 310 is used to limit the opening and closing distance of the bottoms of the two climbing ladders 100, prevent the climbing ladders from slipping, and thus increase the stability and safety of the entire maintenance ladder.

[0020] Preferably, for the convenience of storage and the safety of movement in the non-maintenance state, horizontal universal wheels are provided on one side of the maintenance ladder. After the maintenance is completed, the maintenance ladder can be laid down. At this time, the horizontal universal wheels provided on one side of the maintenance ladder touch the ground, and thus it can be moved conveniently. There are four horizontal universal wheels, two of which are arranged on the side edge of one side of the standing platform 200, and the other two are arranged on the base 300. The two bases 300 are respectively installed with horizontal universal wheels at the ends corresponding to the standing platform where the horizontal universal wheels are installed. When moving or placing in the non-maintenance state, the maintenance ladder is tilted towards the side where the horizontal universal wheels are provided, and then it can be moved and stored.

[0021] Preferably, to increase the stability, the universal wheels provided on the base 300 have a locking function. That is, a brake pedal is provided on the installed universal wheels. After the maintenance ladder is in place, step on the brake pedal to limit the movement of the universal wheels and improve the safety of the maintenance ladder.

[0022] Preferably, the limiting rod 310 is divided into two hinged sections, namely the first limiting rod and the second limiting rod; the first limiting rod and the second limiting rod are respectively hinged to the bases 300 on both sides. The first limiting rod and the second limiting rod are hinged to each other. After opening, the open angle of the two climbing ladders 100 can be limited. When storing, it can be folded between the two climbing ladders 100 to reduce the occupied space during idle time. Further, a pulling rope is provided at the hinged end of the first limiting rod and the second limiting rod. The pulling rope can be connected to the end of the first limiting rod or the end of the second limiting rod. The other end of the pulling rope is connected to the cross bar in the middle of one of the climbing ladders. When storage is needed, pulling the pulling rope can fold the first limiting rod and the second limiting rod, thereby driving the folding of the two climbing ladders 100.

[0023] Furthermore, in order to keep the overall height of the inspection ladder unchanged, the limiting rod composed of the first limiting rod and the second limiting rod is telescopic. One of the first limiting rod or the second limiting rod is set as an adjustable telescopic rod. Or, both the first limiting rod and the second limiting rod are set as telescopic rods. The telescopic rod has a locking function. The locking function can be realized by the connection of a nut and a screw rod for telescoping and locking. It can also be realized by setting a self-resetting locking pin and a locking hole for telescoping and locking.

[0024] In addition to setting the first limiting rod and the second limiting rod as telescopic rods, the hinged position of the first limiting rod and the second limiting rod can also be adjustable to achieve telescoping and locking. For example, the first limiting rod is a straight rod, and a hinge shaft socket is provided at its end. The second limiting rod is a double straight rod, that is, two straight rods are arranged in parallel, and the first limiting rod can be inserted between the double straight rods. Or, a slot is provided in the middle of the second limiting rod. The slot is the same on both sides. In order to realize folding and storage, the slot is communicated up and down, and the first limiting rod is inserted into the slot of the second limiting rod. A number of hinge shaft sockets are provided on the second limiting rod. By corresponding the hinge shaft socket on the first limiting rod with the hinge shaft sockets at different positions on the second limiting rod and inserting the hinge shaft, the telescoping and locking of the limiting rod are realized.

[0025] Preferably, to improve safety, a fence 210 is provided on the outer periphery of the standing platform 200. The fence 210 is grid-shaped or plate-shaped. When the standing platform 200 is rectangular, fences are respectively provided on the four sides to form a cage with an open upper part. In order to facilitate access, one side of the fence 210 on the standing platform 200 is set as an opening and closing door. Preferably, a door is provided on the side connected to the climbing ladder 100.

[0026] Further, in order to reduce the occupied space during storage, the fence 210 is hingedly connected to the edge of the standing platform 200. During storage, the fence 210 can be fitted to the standing platform 200, thereby reducing the occupied space. When the height of the fence 210 is greater than half of the width of the side adjacent to the side hingedly connected to the standing platform 200, a protrusion is provided on one side of the standing platform 200, and the fence 210 is hingedly connected to the protrusion. The height of the protrusion is greater than the thickness of the fence 210, so that the fences 210 on both sides can be stacked together at different times.

[0027] In order to achieve four-sided enclosure, the fence 210 connected to the standing platform 200 is composed of two folded and linked sections. The fence 210 is composed of two panels, and one side of the two panels is hingedly connected. The two panels can be folded into the size of one panel. At this time, the fence 210 is connected to the long side of the standing platform 200, and the climbing ladder 100 is connected to the short side of the standing platform 200. Locking jacks are provided at the edges of the fence 210. A U-shaped bolt is arranged in the jack on one side of the fence 210. The U-shaped bolt is inverted, and one side of it is inserted into a locking jack. An anti-disengagement protrusion is provided at the end of the side inserted into the locking jack. The outer diameter of the anti-disengagement protrusion is greater than the aperture of the locking jack, so as to prevent the U-shaped bolt from falling off. The length of the other side of the U-shaped bolt is less than the side inserted into the locking jack, so as to be easily inserted and locked with the locking jack of another fence 210. The U-shaped bolt is used to connect and lock with the locking jack of another fence 210, so as to achieve four-sided enclosure and locking of the fence.

[0028] Preferably, the length of the base 300 is greater than the width of the climbing ladder 100, thereby improving the stability of the entire inspection ladder. Further, a reinforcing diagonal brace is provided between the side of the climbing ladder 100 and the end of the base 300 to improve the firmness of the inspection ladder.

[0029] In summary, the above is only a preferred embodiment of the present invention and is not used to limit the scope of the present invention. Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content of the specification. All equivalent changes and modifications in terms of shape, structure, features and spirit as required by the present invention shall be included within the scope of the claims of the present invention.

Claims

1. The theater stage mobile maintenance ladder is characterized in that: It includes two climbing ladders (100), a standing platform (200), and a base (300); the upper ends of the two climbing ladders (100) are connected to the standing platform (200), and the lower ends are fixedly connected to the base (300); a limiting rod (310) is arranged between the two bases (300); universal wheels are arranged at the lower part of the base (300), a horizontally arranged universal wheel is arranged on the outer side of one of the bases (300), and a horizontally arranged universal wheel is arranged on the side of the standing platform (200) corresponding to the base (300) with the horizontally arranged universal wheel.

2. The theater stage mobile maintenance ladder according to claim 1, characterized in that: The limiting rod (310) is divided into two hinged sections, namely a first limiting rod and a second limiting rod; the first limiting rod and the second limiting rod are respectively hinged to the bases (300) on both sides.

3. The theater stage mobile maintenance ladder according to claim 1, characterized in that: A fence is arranged on the outer periphery of the standing platform (200), and an opening and closing door is arranged on the side of the fence (210) corresponding to the climbing ladder (100).

4. The theater stage mobile maintenance ladder according to claim 1, characterized in that: Fences are respectively hinged on both sides of the standing platform (200), and the fences include two folded sections.

5. The theater stage mobile maintenance ladder according to claim 4, characterized in that: The fence (210) is in a flat plate shape.

6. The theater stage mobile maintenance ladder according to claim 1, characterized in that: The universal wheels are provided with locking mechanisms.

7. The theater stage mobile maintenance ladder according to claim 2, characterized in that: The first limiting rod or the second limiting rod is a telescopic rod.

8. The theater stage mobile maintenance ladder according to claim 2, characterized in that: A number of hinge shaft jacks are arranged on the first limiting rod and the second limiting rod.

9. The theater stage mobile maintenance ladder according to claim 7 or 8, characterized in that: A pull rope is connected to the hinged end of the first limiting rod or the second limiting rod, and the other end of the pull rope is connected to the middle of the climbing ladder (100).

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