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KR-20260066629-A - Protective shelves

KR20260066629AKR 20260066629 AKR20260066629 AKR 20260066629AKR-20260066629-A

Abstract

The present invention relates to a protective shelf. A protective shelf according to one embodiment of the present invention is a protective shelf that is movable along an elevator shaft and is selectively fixedly installed at each predetermined location on the inner wall surface of the elevator shaft, comprising: a lower frame including a lower step, an intermediate step spaced upward from the lower step, a plurality of lower vertical beams with their lower ends connected to the lower step and their upper ends connected to the intermediate step, and at least one fixing means for fixing or releasing each of the plurality of lower vertical beams to the inner wall surface; and an upper frame including an upper step spaced upward from the intermediate step, and a plurality of upper vertical beams with their upper ends connected to the upper step and their lower ends connected to the upper ends of each of the plurality of lower vertical beams. The apparatus includes a plurality of fixing means opening/closing parts provided on each of the plurality of first upper vertical beams among the plurality of upper vertical beams, and a plurality of first lower vertical beams coupled to each of the plurality of first upper vertical beams among the plurality of lower vertical beams, for blocking or unlocking access to the first fixing means among the at least one fixing means, wherein each of the plurality of fixing means opening/closing parts blocks access to the first fixing means when the lower frame is fixed to the inner wall surface by the at least one fixing means, and unlocks access to the first fixing means when the upper frame is lifted by a crane and moved upward along the elevator shaft.

Inventors

  • 박상우

Assignees

  • 박상우

Dates

Publication Date
20260512
Application Date
20251029

Claims (10)

  1. A protective shelf that is movable along an elevator shaft and is selectively fixedly installed at predetermined locations on the inner wall of the elevator shaft, A lower frame comprising a lower footrest, an intermediate footrest spaced apart from the lower footrest in an upward direction, a plurality of lower vertical beams with their lower ends connected to the lower footrest and their upper ends connected to the intermediate footrest, and at least one fixing means for fixing or releasing each of the plurality of lower vertical beams to the inner wall surface; An upper frame comprising an upper step positioned spaced apart in an upward direction from the intermediate step, and a plurality of upper vertical beams, the upper portions of which are connected to the upper step and the lower portions of which are connected to the upper portions of each of the plurality of lower vertical beams; and It includes a plurality of fixing means opening/closing members that block or unlock access to a first fixing means among at least one fixing means provided on each of the plurality of first upper vertical beams among the plurality of upper vertical beams and on a plurality of first lower vertical beams coupled to each of the plurality of first upper vertical beams among the plurality of lower vertical beams. Each of the above plurality of fixed means opening/closing parts is, When the lower frame is fixed to the inner wall surface by the at least one fixing means, access to the first fixing means is blocked, and A protective shelf characterized by releasing the blockage of access to the first fixing means when the upper frame is lifted by a crane and moved upward along the elevator shaft.
  2. In Article 1, Each of the above plurality of fixed means opening/closing parts is, A lifting hook rotatably coupled to the top of the first upper vertical beam, on which the crane's hook is attached; Blocking means installed to be reciprocally movable in the vertical direction along the length direction of the first upper vertical beam, and blocking or releasing access to the first fixing means; and It includes a wire rope connecting the lifting hook and the blocking means, The above blocking means is, When the lifting hook is not caught on the hook, as the lifting hook rotates downward, it moves downward along the length direction of the first upper vertical beam to block access to the first fixing means, and A protective shelf characterized by the fact that when the lifting hook is caught on the hook, the lifting hook rotates upward and moves upward along the longitudinal direction of the first upper vertical beam to release access to the first fixing means.
  3. In Article 2, The above blocking means is, A cover plate installed at a position adjacent to the first fixing means; and It includes a moving shaft, the lower end of which is coupled to the upper end of the cover plate, and the upper end of which is coupled to the wire rope. The above-mentioned first upper vertical beam is, A protective shelf characterized by having the above-mentioned moving shaft inserted and coupled, and at least one guide member formed to guide the reciprocating movement of the moving shaft when the moving shaft reciprocates in the up and down direction.
  4. In Paragraph 3, Each of the above plurality of fixed means opening/closing parts is, A protective shelf characterized by further including a first elastic member that provides elastic force to the cover plate, wherein the lower portion is supported on the upper portion of the cover plate and the upper portion is supported on a first guide member located at the lowest portion of the at least one guide member.
  5. In Article 1, The above protective shelf is, It further includes a plurality of upper fall prevention members coupled to the upper ends of each of the plurality of first upper vertical beams, and Each of the above plurality of upper fall prevention parts is, An upper fall prevention member formed protruding toward the inner wall surface from the top of each of the plurality of first upper vertical beams; and A protective shelf characterized by including an upper fall prevention bracket that connects the upper fall prevention member to the upper end of each of the plurality of first upper vertical beams.
  6. In Article 1, The above protective shelf is, It includes at least one lower fall prevention member rotatably coupled to a third lower vertical beam among the plurality of lower vertical beams positioned adjacent to the open entrance of the elevator shaft, and Each of the above-mentioned at least one lower fall prevention part is, A protective shelf characterized by being protruding toward the open entrance of the elevator shaft, wherein rotation is interrupted when the lower frame moves downward and contacts the bottom of the open entrance of the elevator shaft, and rotates to be spaced apart from the inner wall of the elevator shaft when the lower frame moves upward.
  7. In Article 6, Each of the above-mentioned at least one lower fall prevention part is, A rotating support bracket coupled to the third lower vertical beam above; A stop member rotatably coupled to the above-mentioned rotary support bracket; and A protective shelf characterized by including a rotation adjustment means connected to one side of the stopper member and adjusting the rotation angle of the stopper member.
  8. In Article 7, Each of the above-mentioned at least one lower fall prevention part is, A protective shelf characterized by further including a second elastic member, which is supported at one end by the rotational support bracket and at the other end by the stop member, and provides elastic force to the stop member when the stop member rotates relative to the rotational support bracket.
  9. In Article 1, The above fixing means is, Anchor bolts fixedly installed on the inner wall surface above; An anchor bracket positioned at a location corresponding to the anchor bolt and coupled to the lower vertical beam such that the anchor bolt is exposed to the inside of the lower vertical beam while encircling the lower vertical beam; and A protective shelf characterized by including a fixing bolt that is coupled to the anchor bolt exposed through the anchor bracket and fixes the lower vertical beam to the inner wall while the anchor bracket is in close contact with the inner wall.
  10. In Article 9, The above lower frame is, A protective shelf characterized by further including at least one support member coupled to connect to each other anchor bracket constituting a first fixing means provided on each of the plurality of lower vertical beams.

Description

Protective shelves The present invention relates to a protective shelf, and more specifically, to a protective shelf that allows a worker to fix (assemble) or release (disassemble) the fixing means for securing the lower frame to the outer wall only when the protective shelf is suspended from a crane, thereby preventing accidents that may occur due to worker negligence and providing a working environment that enables a worker to perform work more safely. Generally, to construct buildings such as apartments, public housing, and high-rise buildings, concrete is poured after foundation civil engineering work to form the exterior walls, and once the exterior walls are completed, various tasks can be performed inside. In particular, in apartments and high-rise buildings, elevator shafts are installed inside for elevators to ascend and descend. These shafts are constructed sequentially from the lower floors to the upper floors in alignment with the building's overall framework, and formwork consisting of assembled square panels is used for pouring concrete. For example, Korean registered patent publication No. 10-1149567 (formwork device for elevator shaft) (published June 7, 2012) discloses the structure of a formwork device for constructing an elevator shaft. Meanwhile, to construct the elevator shaft, a protective shelf is installed inside the shaft, square panels are assembled to form the formwork, and concrete is poured. Once the concrete curing of the lower wall is complete, the formwork panels are separated from the concrete, and the protective shelf and formwork panels are moved to the upper area using a crane or similar equipment to repeat the process of constructing the upper wall. Generally, the protective shelf consists of an upper frame providing an upper workspace and a lower frame providing a lower workspace, and has a structure that allows construction work on the upper wall surface to be performed using formwork installed on the upper frame while the lower frame is fixed to the lower wall surface where construction is completed, such as with anchor bolts. However, conventional protective shelves had a problem in that accidents could occur where the shelf fell or the worker fell due to the worker disassembling anchor bolts, etc., while the shelf was not suspended from the crane due to worker negligence. In addition, it is necessary to prevent unexpected falls during construction work while the protective shelf is installed in the elevator shaft; however, conventional protective shelves lack a fall prevention structure other than being fixed to the inner wall of the elevator shaft, which poses a problem in that a fatal accident could occur if the protective shelf falls. Therefore, a protective shelf is required that can provide a safer working environment for workers to perform their work, as it prevents accidents that may occur due to worker negligence by allowing the worker to fix (assemble) or release (disassemble) the fastening means for securing the lower frame to the outer wall only when the protective shelf is suspended from the crane. FIG. 1 is a perspective view showing a protective shelf according to one embodiment of the present invention. FIG. 2 is a front view showing a protective shelf according to one embodiment of the present invention. FIG. 3 is a side view showing a protective shelf according to one embodiment of the present invention. FIG. 4 is a plan view showing a protective shelf according to one embodiment of the present invention. FIG. 5 is a perspective view showing the structure of a fixing means opening/closing part constituting a protective shelf according to one embodiment of the present invention. FIG. 6 is a front view showing the structure of a fixing means opening/closing part constituting a protective shelf according to one embodiment of the present invention. FIG. 7 is a drawing showing a fixing means opening/closing part constituting a protective shelf according to one embodiment of the present invention blocking access to the fixing means. FIG. 8 is a drawing showing the opening and closing part of a fixing means constituting a protective shelf according to one embodiment of the present invention releasing access to the fixing means. FIG. 9 is a perspective view showing the structure of a fixing means constituting the lower frame of a protective shelf according to one embodiment of the present invention. FIG. 10 is a front view showing the structure of a fixing means constituting the lower frame of a protective shelf according to one embodiment of the present invention. FIG. 11 is a perspective view showing a modified example of a fixing means constituting the lower frame of a protective shelf according to one embodiment of the present invention. FIG. 12 is a plan view showing a modified example of a fixing means constituting the lower frame of a protective shelf according to one embodiment of the present invention. FIG. 13 is a perspective view showing the stru