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KR-20260067191-A - Manhole safety device and manhole construction method using the same

KR20260067191AKR 20260067191 AKR20260067191 AKR 20260067191AKR-20260067191-A

Abstract

The present invention relates to a manhole safety device and a manhole construction method using the same. More specifically, the invention relates to a manhole safety device and a manhole construction method using the same that facilitates easy installation and removal of manholes, increases work efficiency, and minimizes the area required for storage and transportation. To achieve the above technical objectives, one embodiment of the present invention provides a manhole safety device and a manhole construction method using the same, comprising: a central frame (100); and a plurality of supports (200) having a certain length to be inserted into a manhole side wall groove (10), each having a fastening portion formed at one end that can be fastened to and detached from the central frame (100).

Inventors

  • 김민영

Assignees

  • 유라이닝(주)

Dates

Publication Date
20260512
Application Date
20241105

Claims (8)

  1. A manhole safety device comprising: a central frame (100); and a plurality of supports (200) having a certain length to be inserted into a manhole side wall groove (10), and having a fastening portion formed at one end that can be fastened and detached from the central frame (100).
  2. In paragraph 1, Each of the above plurality of supports (200) has a fastening part (130, 140, 150, 160) formed with a through hole at one end, and The above central frame (100) is a manhole safety device characterized by a central axis (111) formed at the bottom being inserted and fixed through the stacked through hole.
  3. In paragraph 1, Each of the above plurality of supports (200) has a fastening screw (212) formed at one end, and A manhole safety device characterized in that the above central frame (100) has a screw groove (101) formed therein corresponding to the above fastening screw (212).
  4. In paragraph 1, The support member (200) comprises: a cylinder housing (210) coupled to the center frame (100); a sliding extension rod (220) inserted into the cylinder housing (210); a protrusion (230) formed on one side of the sliding extension rod (220); and a guide slit (240) that guides the sliding extension rod (220) to move in a state where the protrusion (230) protrudes outward from the cylinder housing (210). A manhole safety device characterized in that the guide slit (240) includes a retraction prevention portion (250) formed by vertical bending at least twice to prevent the protrusion (230) from retracting in a straight direction.
  5. In paragraph 4, A manhole safety device characterized in that the guide slit (240) is vertically bent four or more times, and the formation point of the retraction prevention part (250) exists in a U-shape.
  6. In paragraph 4, A manhole safety device characterized in that the guide slit (240) is formed such that the protrusion (230) is positioned on the side of the cylinder housing (210) when the sliding extension rod (220) is extended outward to its maximum extent.
  7. In a manhole construction method using a manhole safety device pursuant to Paragraph 2, A step of forming a side wall groove (10) of a certain depth in the manhole side wall so that the other end of the plurality of supports (200) can be inserted and supported; A step of inserting the other end of the plurality of supports (200) into the side wall groove (10); A step of stacking fastening parts (130, 140, 150, 160) having through holes formed at one end of the plurality of supports (200), and then inserting and passing a central axis (111) formed at the bottom of the central frame (100) into the through holes and fixing them; and A manhole construction method characterized by including the step of installing a manhole cover (20) on top of the above manhole safety device.
  8. In a manhole construction method using a manhole safety device pursuant to Paragraph 4, A step of forming a side wall groove (10) of a certain depth in the side wall of a manhole so that the sliding extension rod (220) of the above manhole safety device can be inserted and supported in an extended state; A step of slidingly unfolding the sliding extension rod (220) inserted into the cylinder housing (210) and inserting it into the side wall groove (10); A step of fixing a protrusion (230) formed on one side of the extension rod (220) by positioning it on a retraction prevention part (250) formed by vertically bending the guide slit (240); and A manhole construction method characterized by including the step of installing a manhole cover (20) on top of the above manhole safety device.

Description

Manhole safety device and manhole construction method using the same The present invention relates to a manhole safety device and a manhole construction method using the same, and more specifically, to a manhole safety device that can be easily installed and removed from a manhole to increase work efficiency and minimize the area required for storage and transportation, and a manhole construction method using the same. The entrance of a manhole is sealed by a manhole cover made of a material such as metal that carries a significant weight. However, there was a concern regarding safety accidents where pedestrians could fall into the manhole if the manhole cover was lost due to reasons such as flooding or construction. The following introduces relevant prior art. The identification symbols in the prior art below are unrelated to the present invention. Korean Registered Patent No. 10-2664006, 'Fall Prevention Safety Net for Manholes,' relates to a fall prevention safety net for manholes. By providing a fall prevention safety net in which the ends of support rods on both sides of a grating, which is folded so that both sides can rotate by means of a hinge member, are inserted and fixed within the manhole and fastened with bolts and nuts, the net remains sturdy even if the manhole cover is separated by backflow due to strong water pressure. This prevents pedestrians crossing flooded roads from being sucked into the manhole, thereby preventing accidents involving human casualties. Additionally, it has the effect of preventing safety accidents caused by pedestrians falling into the manhole while passing by without noticing the manhole during general manhole maintenance work. However, in the case of the fall prevention safety net for manholes disclosed in the aforementioned prior art, there was an inconvenience in that the support rod had to be cut to remove it as needed after it had been detached once inside the manhole, and there was a limitation in that it was also difficult to reinstall it. In addition, since it is a circular shape that occupies a fixed area, there was also a problem of reduced efficiency during storage and transportation. FIG. 1 is a perspective view of a first embodiment of the manhole safety device of the present invention. FIG. 2 is a perspective view of a second embodiment of the manhole safety device of the present invention. FIG. 3 is a perspective view of a third embodiment of the manhole safety device of the present invention. FIG. 4 is a perspective view of a fourth embodiment of the manhole safety device of the present invention. FIG. 5a is a perspective view of a fifth embodiment of the manhole safety device of the present invention. FIG. 5b is an explanatory diagram showing the process of reducing the volume of a manhole safety device according to the fifth embodiment. FIG. 6 is a perspective view of the sixth embodiment of the manhole safety device of the present invention. FIG. 7 is a perspective view of the seventh embodiment of the manhole safety device of the present invention. FIG. 8 is a flowchart relating to a manhole construction method using the manhole safety device of the present invention. FIGS. 9 and FIGS. 10 are explanatory diagrams illustrating a construction method using the manhole safety device of the first embodiment. The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals. The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of a first embodiment of a manhole safety device according to the present invention. As illustrated in FIG. 1, the present invention relates to a manhole safety device comprising a central frame (100) and a plurality of supports (200) installed on the central frame (100) and fixed to the inner wall of a manhole, wherein the supports (200) comprise: a cylinder housing (210) connected to the central frame (100); a sliding extension rod (220) inserted into the