Opening / closing scaffold climbing device

Abstract

To provide a scaffold climbing device in which stairs for climbing are installed only when climbing up and down between upper and lower cloth boards, and stairs can be stored compactly when a scaffold is in use.SOLUTION: An opening / closing scaffold climbing device for moving between an upper and lower scaffold comprises a foldable stair tread body 1 and an opening / closing work floor 9 that covers an opening to which the stair tread body is connected. The stair tread body 1 is composed of a fixed bridgeboard 2 that has an upward step and is fixed to one end of a side frame 10 of the opening, a movable bridgeboard 3 that has a downward step and is freely rotatable, and a plurality of treads 4 that are sandwiched between the fixed bridgeboard 2 and the movable bridgeboard 3 and are fixed so that they can be rotated. When stairs are in use, the work floor 9 is opened to form an opening, and the movable bridgeboard 3 of the tread body is rotated and positioned at the other end of the side frame 10 to form the stairs, to leave the stair tread body in a passable state. When the stairs are not in use, the stair tread body is folded into a flat state and the work floor 9 is rotated to close the opening, to leave the work floor in a passable state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffolding lifting device for moving up and down between upper and lower scaffolding, where multiple levels of framework scaffolding are installed around the perimeter of a building at construction, renovation, or demolition sites. [Background technology]

[0002] Conventionally used scaffolding climbing devices have openings in the scaffolding's slats, and stairs or ladders connecting to the lower scaffolding's slats are installed near the openings. Workers use these stairs or ladders to move between the upper and lower scaffolding slats. However, workers who work on building construction, etc., typically wear a variety of equipment around their waists and chests, such as harnesses and waist gear. Wearing a full set of such equipment significantly increases the worker's body circumference. This makes it difficult to move between upper and lower scaffolding using stairs or ladders permanently installed on the scaffolding. In other words, in conventional staircases, the stairs connecting the upper and lower scaffolding are permanently installed, and a fence called a stair guard is installed at the opening in the upper scaffolding's floor plank to prevent falls. However, this narrows the gap between the stair guard and the scaffolding frame, making it difficult for fully equipped workers to move between the upper and lower scaffolding or pass through the opening in the stairs.

[0003] Therefore, a scaffolding climbing device has been developed in which the stairs are moved to a corner so as not to obstruct traffic during normal work, and stairs are installed only when it becomes necessary to ascend or descend between the upper and lower decks. In this case, the opening near the stairs can be covered with an openable deck when the stairs are not in use, allowing the original width of the scaffolding to be used.

[0004] The open-close type fabric frame device shown in Patent Document 1 is equipped with an open-close type floor-mounted fabric frame and an ascending staircase. The ascending staircase is installed in the opening when ascending and descending between the upper and lower fabric frames, but when the staircase is not in use, it is flipped up and held by the upper fabric frame. However, this fabric frame device works by lifting the lower end of the stairs and fixing it to the upper fabric frame, which means that workers are forced to reach out and fix it to the upper fabric frame every time they move.In addition, the lower end of the stairs is bent and protrudes downward to make it easier to pass through the stairs, so if it is fixed to the upper fabric frame, this part gets in the way, and there is a problem that there is not enough space for workers to pass through.

[0005] Furthermore, the construction frame shown in Patent Document 2 employs a method of rotating the active plate set of the ascending and descending stairs to one side of the support rod in order to move the stairs to a corner so as not to obstruct passage. However, even with this method, the stair plate 332 at the top step and the upper and lower connecting rods 32 cannot be rotated to one side of the support rod (Fig. 2), which creates the problem of not being able to ensure a sufficient passage for workers to pass through.

[0006] Furthermore, Patent Document 3 describes a folding stair unit, in which the stair tread body is composed of a tread 43 rotatably mounted between a fixed side plate 41 and a swinging side plate 42, and when folding this stair tread body, the swinging side plate is folded over near the fixed side plate. However, even in this folding stair unit, no consideration is given to ensuring sufficient passage for workers to pass through. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 11-193626 [Patent Document 2] Utility Model Registration No. 3106505 [Patent Document 3] Japanese Patent Application Publication No. 4-277260 Summary of the Invention [Problem to be solved by the invention]

[0008] To provide a scaffolding climbing device which can install stairs for climbing only when ascending and descending between upper and lower cloth boards, and can store the stairs compactly in a position that does not obstruct the passage of workers when the scaffolding is in normal use. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides an openable / closable scaffolding lifting device having the following configuration. [1] An open-close scaffolding lifting device for moving between the upper and lower sheet metal of a frame scaffold, comprising a foldable stair tread body and an open-close working platform that covers the opening to which the stair tread body is connected, wherein the stair tread body is composed of a fixed rafter with an upward step and fixed to one end of the side frame of the opening, a rotating rafter with a downward step and freely rotatable around the fixed rafter, and a plurality of treads sandwiched between the fixed rafter and the rotating rafter and rotatably fixed to the steps of both rafters, when the stairs are in use, the working platform is opened to form an opening, and the rotating rafter of the stair tread body is rotated and positioned at the other end of the side frame to form the stairs, thereby making the stair tread body passable, and when the stairs are not in use, the stair tread body is folded into a flat plate-like body and stood vertically, and the working platform is rotated to close the opening, thereby making the working platform passable. [2] The fixed rafter has a hook at its upper end, which allows it to be fixed to one end of the side frame, and the rotating rafter has an extended upper end to form a handle, which can be used to rotate the rotating rafter by holding the handle and unfolding the stair tread body to form the stairs. [1] The open-close scaffolding lifting device described in [1]. [3] The treads have a parallelogram shape, with the tips of a pair of opposing corners removed, one fixed to the fixed rafter and the other fixed to the rotating rafter, so that when the stair tread body is folded, the pair of rafters and the multiple tread bodies form a flat plate-like body. [1] An open / close scaffolding lifting device as described in either [1] or [2]. [4] The handle extends from the upper end of the rotating rafter, and when the stair tread body forms a staircase, the opening cannot be closed with the work platform, and the stair tread body cannot be unfolded to form a staircase unless the work platform is opened to form an opening. [2] The openable scaffolding lifting device described in [2]. [5] The opening and closing scaffolding lifting device described in [3] is configured such that the plurality of treads and both of the rafters are fixed together using hinges that can rotate around a rotation axis. [6] A method of using an openable / closable scaffolding lifting device as described in either [1] or [2], wherein when descending to a lower scaffolding board, the work platform is opened to form the opening, and the handle is rotated to unfold the stair treads to form stairs; when moving to a higher scaffolding board, the work platform is opened to form the opening, and the stair treads are unfolded to form stairs; when the stairs are not in use, the stairs are folded up and stored as flat, plate-like stair treads, and the work platform is closed to cover the opening with the work platform, thereby enabling movement on the work platform. [Effects of the Invention]

[0010] The openable scaffolding lifting device of the present invention has the above-mentioned configuration, so when the stairs for lifting and descending are not in use, the stair treads can be folded into flat plates and stored, thereby maintaining a wide passageway for workers moving on the scaffolding. Furthermore, when using the stairs for lifting and descending to move between the upper and lower cloth plates, the folded stair treads can be easily unfolded with one hand to form the stairs. [Brief explanation of the drawings]

[0011] [Figure 1] This shows the state in which the openable / closable scaffolding climbing device of the present invention is applied to a building's frame scaffolding, and the stairs are deployed. [Figure 2] This shows the unfolded stairs as seen from a worker's perspective. [Figure 3] This shows the state in which the stairs in Figure 1 are folded and stored on the periphery of the framework scaffolding, and the work platform is closed. [Figure 4]This shows the closed working platform in Figure 3 as seen from the perspective of a worker on the floor board on the lower floor. [Figure 5] This shows the closed working platform in Figure 3 as seen from the perspective of a worker on the floor board on the upper floor. [Figure 6] FIG. 1 is a plan view of a stair tread assembly used in the present invention in a folded-up state. [Figure 7] This shows the connection between the fixed girders and the treads. The steps on the fixed girders are installed facing upward. [Figure 8] This shows the connection between the rotating girders and the treads. The steps of the rotating girders are installed facing downwards. [Figure 9] This is a view of the front side of the stair tread body when it is folded into a flat plate shape. [Figure 10] This is a view from the back of the stair tread body when it is folded into a flat plate shape. [Figure 11] This shows the handle extending from the rotating slat projecting from the surface of the work surface. The handle gets in the way and prevents the work platform from completely covering the opening. DETAILED DESCRIPTION OF THE INVENTION

[0012] (Unfolded state) Figures 1 and 2 show the state in which the openable scaffolding climbing device of the present invention is applied to a building frame scaffold and the stairs are deployed. Workers who want to move up and down between the upper and lower scaffolding boards can use the created stairs to go up and down. It is necessary to install handrails along the stairs to ensure the safety of workers going up and down the stairs.

[0013] (closed state) Figure 3 shows the state in which the stairs that were unfolded in Figure 1 have been folded up to form a flat stair tread body, which has been stored vertically along the fixed rafter, and the work platform has been closed. 4 and 5 show the state of the scaffolding from the worker's perspective. Fig. 4 shows the view from the floor board of the lower floor where the retractable stair tread body of the present invention is installed, and Fig. 5 shows the view from the floor board of the upper floor. As is clear from these figures, workers can move on the floor board of the frame scaffolding using the same width as other parts.

[0014] (Scraper) FIG. 6 is a plan view of the stair scaffolding in a folded state. A plurality of treads 4 are fixed between the fixed support beam 2 and the rotating support beam 3. The fixed scaffolding girders are connected to the treads 4 with the step portions 7a facing upward, and hooks 5 are provided on the upper and lower portions thereof, so that the fixed scaffolding 2 can be fixed to one end of the side frame 10 of the opening. The rotating rafter 3 is connected to the tread 4 with the step 7b facing downward, and a handle 6 is formed at the top of the rotating rafter by extending the rotating rafter. The handle can be grasped to rotate the rotating rafter and unfold the stairs. When the stairs are unfolded, the handle 6 is placed on the side frame 10 of the opening, fixing the stairs in place. In this state, the handle 6 protrudes from the fabric board, so the work platform 9 cannot be properly closed until the stairs are folded down, as shown in Figure 11.

[0015] (treadboard) As shown in Figure 6, the multiple treads 4 rotatably fixed to the rafter have a parallelogram shape with the tips of a pair of opposing diagonal corners shaved off. These shaved off parts are connected to the steps 7a and 7b of the fixed rafter 2 and the rotating rafter 3 on both sides. In this folded state, the stair tread body 1 has a flat, plate-like shape, allowing for compact storage and preventing workers from passing through.

[0016] (Step connection) Figures 7 and 8 show the state in which the girders 2, 3 are connected to the tread 4. Figure 7 shows the view from the front side of the tread 4, and Figure 8 shows the view from the back side. It is preferable that the connection be made at the step portions 7a and 7b of the girders using hinges 8a, 8b that can rotate around a rotation axis. Since the stair tread body of the present invention is connected in this manner, it functions as a staircase when unfolded, and when the staircase is folded, the rotating rafter rotates and moves to the top of the fixed rafter, and the rotating rafter, the rotating rafter and the multiple treads form a flat plate-like body.

[0017] (flat plate) The stair tread 1 of the present invention can be folded into a flat plate-like body. Figure 9 shows this flat tread body as seen from the outside of the scaffolding, and Figure 10 shows the structure as seen from above the fabric plate inside the scaffolding. In the present invention, the tread stairs for ascending and descending can be folded into a flat plate-like body like this, so that when the ascending and descending stairs are not in use, workers can pass through the scaffolding much more easily than with conventional ascending and descending devices. [Explanation of symbols]

[0018] 1 Stair tread body 2 Fixed girders 3 Rotating girders 4 Treadboard 5 Hooks 6 Handle 7a, 7b Stepped section 8a, 8b hinges 9 Work Platform 10 Side frame

Claims

1. An openable scaffolding lifting device for moving between the upper and lower slats of a frame scaffolding, comprising a foldable stair tread body and an openable work platform that covers an opening to which the stair tread body is connected; The staircase tread body is composed of a fixed rafter having an upward step portion and fixed to one end of the side frame of the opening, a rotating rafter having a downward step portion and being rotatable around the fixed rafter, and a plurality of treads sandwiched between the fixed rafter and the rotating rafter and rotatably fixed to the steps of both rafters. When the stairs are in use, the work floor is opened to form an opening, and the rotating rafter of the stair tread body is rotated and placed on the other end of the side frame to form a stair, thereby making the stair tread body passable; When the stairs are not in use, the stair tread body is folded into a flat plate-like body and stands upright, and the work platform is rotated to close the opening, thereby making the work platform passable. Openable scaffolding lifting device.

2. The scaffolding lifting device of claim 1, wherein the fixed rafter has a hook at its upper end, by which it is fixed to one end of the side frame, and the rotating rafter has an extended upper end to form a handle, and the handle is used to rotate the rotating rafter to unfold the stair tread body and form the stair.

3. The steps have a parallelogram shape, with the tips of a pair of opposing corners removed, one fixed to the fixed rafter and the other fixed to the rotating rafter, so that when the stair step body is folded, the pair of rafters and the multiple step bodies form a flat plate-like body. An open-close scaffolding lifting device as described in either claim 1 or 2.

4. The handle extends from the upper end of the pivoting rafter, and when the stair treads are forming stairs, the opening cannot be closed with the work platform, and the stair treads cannot be unfolded to form stairs unless the work platform is opened to form an opening.

5. 4. The scaffolding lifting device according to claim 3, wherein the plurality of treads and the two girders are fixed to each other using hinges that are rotatable about a rotation axis.

6. A method for using the openable scaffolding lifting device according to claim 1 or 2, When descending from the upper cloth board to the lower cloth board, the work platform is opened to form the opening, and the handle is rotated to unfold the stair tread body to form a staircase; When moving from a lower cloth plate to an upper cloth plate, the work floor is opened to form the opening, and the stair tread body is unfolded to form a staircase; When the stairs are not in use, the stairs are folded and stored as flat, plate-like stair treads, and the work platform is closed to cover the opening, making it possible to move on the work platform. How to use the retractable scaffolding lifting device.

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