Inspection well for protecting communication cable in public house

Abstract

The invention relates to an inspection well for protecting communication cables in a public house, which is used for maintaining and repairing the communication cables laid underground in the public house. The inspection well for communication cable protection in a public house according to an embodiment of the present invention comprises: an inspection well body in which a connection unit for connecting a communication cable is formed; the inspection well for protecting the communication cable in the public house comprises an inspection well body and an access hole part vertically extending from the upper part of the inspection well body to the ground so that a worker can enter the inspection well body, and the inspection well for protecting the communication cable in the public house comprises an anti-falling frame which is exposed at the upper part of the access hole part and is arranged in the access hole part in a vertical sliding manner; the anti-falling part is used for preventing falling into the entering hole part; a main body access door that opens and closes the inspection well main body by sliding in the horizontal direction from a position connected to the access hole part in the inspection well main body; and a safe opening restricting part that exposes the fall prevention frame at the upper part of the access hole part and restricts the opening of the main body access door by the vertical movement of the fall prevention frame at the access hole part so as to open the main body access door only in a state in which the main body access door falls into the access hole part.

Description

Technical Field

[0001] The invention relates to an inspection well for protecting communication cables in a public residence, which is used for maintaining and repairing communication cables laid underground in the public residence. Background Art

[0002] Typically, communication cables are laid underground and run into public housing.

[0003] The communication cables buried underground are connected to each other or branched out in the inspection well. In order to enter the inspection well to work, it is necessary to open the inspection well cover to enter. However, if pedestrians pass by without knowing that the inspection well cover is opened, they may fall into the inspection well.

[0004] In order to solve this problem, the existing Korean Authorized Patent Gazette No. 10-2490298 (published on January 18, 2023) discloses a "manhole anti-fall device".

[0005] The above-mentioned existing inspection well anti-fall device includes: a first safety frame, a specified hole is formed on the inner side; a second safety frame, a specified hole is formed on the inner side, is arranged on the outer side of the inspection well and is placed on the ground; a plurality of brackets are extended from one side of the above-mentioned first safety frame toward the second safety frame, are hingedly connected to the first safety frame and the second safety frame, are separated from each other by specified intervals, and include a folding part and a folding fixing part on one side, the above-mentioned folding part is a hinge structure, and the above-mentioned folding fixing part is arranged on the folding part for fixing the folding part; and an entry and exit part, which is hingedly connected to one side of the above-mentioned first safety frame to enable users to enter and exit, and the other side is an open structure.

[0006] When the inspection well is open, the above-mentioned existing inspection well anti-falling device is hung on the upper part of the inspection well to prevent pedestrians from falling into the inspection well.

[0007] However, the existing inspection well anti-fall device needs to be set up separately after the inspection well is opened. Therefore, if the setting is forgotten, there is not only the risk of another fall accident, but also the need to carry and set the inspection well anti-fall device, which causes cumbersome work.

[0008] Furthermore, the existing manhole anti-fall device can only prevent falling toward the manhole, and has no other functions. For example, when the manhole is contaminated by toxic gases, there is a problem that workers may suffocate if they directly enter the manhole. Summary of the Invention

[0009] Technical issues

[0010] In order to solve the above-mentioned problems, the object of the present invention is to provide a communication cable protection inspection well in a public residence as follows, that is, an anti-fall frame is inserted into the entrance hole into the interior of the inspection well body, so there is no need to carry an anti-fall device separately, and because the anti-fall frame is raised and protrudes from the inspection well, work can be easily carried out without setting up an anti-fall device.

[0011] Furthermore, another object of the present invention is to provide a communication cable protection inspection well in a public residence as follows, that is, since a main body access door is provided between the inspection well body and the entrance hole, suffocation accidents caused by internal contamination of the inspection well body can be prevented by blocking the direct entry into the inspection well body.

[0012] Furthermore, another object of the present invention is to provide an inspection well for protecting communication cables in a public residence, wherein the anti-fall frame is connected to the main body entrance door through a safety opening restriction portion. In order to enter and exit the inspection well main body, the anti-fall frame needs to be raised to open the main body entrance door. Therefore, it is possible to prevent pedestrians from falling into the entrance hole due to failure to take safety measures for the anti-fall frame.

[0013] Furthermore, another object of the present invention is to provide a communication cable protection inspection well in a public residence, wherein warning lights and pollution detection sensors are provided at the entrance and exit doors of the inspection well body. Therefore, measures can be taken to deal with the internal pollution of the inspection well body by understanding the internal pollution status of the inspection well body before entering, thereby preventing suffocation accidents caused by internal pollution.

[0014] Furthermore, another object of the present invention is to provide an inspection well for protecting communication cables in a public residence, wherein when the anti-fall frame rises from the entry hole, the barrier membrane component unfolds and surrounds the anti-fall frame, thereby improving the effect of preventing pedestrians from falling into the entry hole.

[0015] Furthermore, another object of the present invention is to provide an inspection well for protecting communication cables in a public residence, wherein a fan setting portion is provided on the anti-fall frame. Therefore, when the interior of the inspection well body is contaminated, a ventilation fan can be provided on the fan setting portion to take ventilation measures, thereby preventing suffocation accidents caused by internal contamination.

[0016] Technical Solution

[0017] In order to achieve the above-mentioned purpose, the inspection well for protecting communication cables in a public-type residential building in an embodiment of the present invention includes: an inspection well body, which is formed with a connection unit for connecting communication cables; and an entry hole portion, which extends vertically from the upper part of the above-mentioned inspection well body to the ground, so that staff can enter the above-mentioned inspection well body. The inspection well for protecting communication cables in the above-mentioned public-type residential building includes: an anti-fall frame, which is exposed at the upper part of the above-mentioned entry hole portion and is arranged inside the above-mentioned entry hole portion in a manner that can slide up and down, for preventing falling into the above-mentioned entry hole portion; a main body entry and exit door, which slides horizontally in the above-mentioned inspection well body from a position connected to the above-mentioned entry hole portion to open and close the above-mentioned inspection well body; and a safety opening limiting portion, so that the above-mentioned anti-fall frame is exposed at the upper part of the above-mentioned entry hole portion, and the opening of the above-mentioned main body entry and exit door is limited by the up and down movement of the above-mentioned anti-fall frame in the above-mentioned entry hole portion, so that the above-mentioned main body entry and exit door can be opened only in response to falling into the above-mentioned entry hole portion.

[0018] The above-mentioned safety opening limiting part may include: an opening limiting hole, which is formed through the above-mentioned main body entrance door; and an opening limiting frame part, so that the above-mentioned anti-fall frame is exposed at the upper part of the above-mentioned entrance hole part. As the above-mentioned anti-fall frame detaches from the above-mentioned opening limiting hole, the above-mentioned anti-fall frame passes through the above-mentioned opening limiting hole without being exposed at the upper part of the above-mentioned entrance hole part and extends toward the lower part of the above-mentioned main body entrance door, so as to release the fixation of the above-mentioned main body entrance door.

[0019] The above-mentioned anti-fall frame includes a barrier film component. When the above-mentioned anti-fall frame is exposed at the upper end of the above-mentioned entry hole, the above-mentioned barrier film component unfolds and surrounds the above-mentioned anti-fall frame, preventing falling through the above-mentioned anti-fall frame. The above-mentioned entry hole may include a film component receiving groove formed at the upper end part of the above-mentioned entry hole to receive the above-mentioned barrier film component in a folded state.

[0020] The anti-fall frame may include a fan setting portion for hanging an air replacement fan, which allows air to flow from the outside into the interior of the inspection well body through the inlet hole or releases polluted air inside the inspection well body according to the degree of air pollution.

[0021] Effects of the Invention

[0022] The present invention has the following effect, that is, the anti-fall frame is arranged in an up and down sliding manner at the entry hole portion for entering the inspection well body, so that the anti-fall frame can be moved upward in the entry hole portion so as to protrude from the entry hole portion. As a result, not only can pedestrian falling accidents be prevented, but also, since the anti-fall frame is inserted and arranged in the entry hole portion, work can be easily performed without carrying a separate anti-fall device.

[0023] Furthermore, a main body access door is separately provided between the entry hole and the inspection well main body, so that suffocation accidents can be prevented by pre-processing internal contamination before entering the inspection well main body.

[0024] Furthermore, before the main body is opened to enter or exit the door, the safety opening restriction portion can be used to project an anti-fall frame from the upper portion of the entry hole portion to take safety measures before operation. Therefore, even if the safety measures for preventing falling into the entry hole portion are not taken, pedestrian falling accidents can be prevented.

[0025] In addition, pollution detection sensors and warning lights are set at the entrance and exit doors of the main body. Therefore, before entering the inspection well body, the internal pollution status of the inspection well body can be grasped to prevent suffocation accidents caused by entering the internally contaminated inspection well body.

[0026] Furthermore, when the anti-falling frame rises, the barrier film component can be unfolded to surround the anti-falling frame to further improve the anti-falling effect on pedestrians.

[0027] In addition, a fan setting portion is formed on the anti-fall frame, and a ventilation fan can be installed in the fan setting portion according to the internal pollution level of the inspection well body. In this way, the contaminated interior of the inspection well body can be ventilated to prevent suffocation accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a side sectional view of an inspection well for protecting communication cables in a public residence according to an embodiment of the present invention.

[0029] Figure 2 This is a side sectional view of a communication cable protection inspection well in a public housing unit according to an embodiment of the present invention, showing a state facing a fall prevention frame.

[0030] Figure 3 This is a side sectional view of a communication cable protection inspection well in a public residence according to an embodiment of the present invention, showing a state in which the main body entrance door operates through a safety opening restriction portion.

[0031] Figure 4 This is a side sectional view of a communication cable protection inspection well in a public housing unit according to an embodiment of the present invention, showing a state where a ventilation fan is installed in a fan installation portion. DETAILED DESCRIPTION

[0032] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0033] like Figures 1 to 2 As shown, the inspection well 100 for protecting communication cables in a public residence according to an embodiment of the present invention is formed with an inspection well body 110 having a hollow cylindrical shape inside, and the inspection well body 110 can be buried underground.

[0034] An access hole 120 is formed in the manhole body 110 so that the manhole body 110 is connected from the ground to the underground, allowing access from the ground to the interior of the manhole body 110 buried underground.

[0035] Laying pipes 130 may be connected to both ends of the inspection well body 110 for laying communication cables 210 connected to each other underground. The communication cables 210 are in contact at the center of the inspection well body 110 through the laying pipes 130 on both sides and are connected by the connecting unit 220.

[0036] The inspection well body 110 , the access hole portion 120 , and the laying pipe portion 130 may be formed of concrete to have a predetermined thickness capable of withstanding soil pressure.

[0037] In the case of electrical communication through the communication cable 210 , the connection unit 220 may enable electrical connection, and in the case of optical communication, may enable optical connection.

[0038] The connection unit 220 is located in the inspection well body 110 and can be separated from the bottom plate by a bracket, thereby preventing the inspection well body 110 from being flooded due to the inflow of rainwater.

[0039] An upper portion of the access hole portion 120 may be sealed by an inspection manhole cover 121 , and the inspection manhole cover 121 may be made of a relatively heavy metal so that the access hole portion 120 is difficult to open.

[0040] The manhole cover 121 seals the inlet hole 120 and can perform a blocking function of preventing rainwater from flowing into the inlet hole 120 .

[0041] A membrane member receiving groove 123 may be formed in the inlet hole 120 and located at the lower portion of the hanging manhole cover 121 . The bellows-shaped barrier membrane member 170 may be inserted into the membrane member receiving groove 123 in a state of being contracted along the length direction.

[0042] A body access door 140 for entering the inspection well body 110 through the entry hole 120 or for blocking entry may be provided between the entry hole 120 and the inspection well body 110. The body access door 140 may slide horizontally between the inspection well body 110 and the entry hole 120 to open or seal the inspection well body 110.

[0043] For example, when polluted air (toxic gas) is filled into the manhole body 110 through the laid pipe portion 130, there may be a problem of suffocation accidents due to opening the manhole cover 121 without knowing the pollution status. Therefore, before opening the main body entrance door 140, suffocation accidents can be prevented by blocking the polluted air from flowing into the entrance hole portion 120.

[0044] A pair of main body access doors 140 are provided in a facing manner, blocking the entry into the inspection well body 110 by contacting each other at the entry hole 120, or can be spaced apart and slid in opposite directions to open the inspection well body 110.

[0045] A door handle portion for holding may be formed on the main body entrance door 140 so that a worker entering through the entrance hole 120 can easily open and close the main body entrance door 140 by sliding.

[0046] A door slot 111 may be formed between the entry hole 120 and the inspection well body 110 , and a body entry / exit door 140 may be slidably inserted in a horizontal direction.

[0047] Among them, when the inspection well body 110 is opened, the main body entrance door 140 cannot be fully inserted into the door groove 111 and fully open the inspection well body 110, and a part of it can be exposed from the door groove 111 so that the opening limiting frame part 163 located at the lower part of the anti-fall frame 150 described below can be located on the upper surface of the main body entrance door 140.

[0048] On the other hand, a fall prevention frame 150 may be provided inside the entry hole 120, which is arranged in the entry hole 120 in a manner that it can slide up and down. The upper part of the frame 150 is exposed to the ground when the staff inside the entry hole 120 is lifted up, so as to prevent the staff from falling into the entry hole 120.

[0049] For example, the anti-fall frame 150 can be formed into a cylindrical shape, and the overall shape corresponds to the inner circumference of the entry hole 120. A plurality of ring frames 151 are arranged spaced apart above and below, and a plurality of vertical frames 153 are arranged around the outer circumference or inner circumference of the plurality of ring frames 151 and connected to each other. The shape of the entry barrier frame can correspond to the inner circumference of the entry hole 120, and the staff entering through the entry hole 120 can be located on the inner circumference of the anti-fall frame 150.

[0050] When the anti-fall frame 150 is located inside the entry hole 120 , the plurality of ring frames 151 arranged vertically may function as a step for entering and exiting the entry hole 120 .

[0051] In order to enter the entry hole 120 , a frame handle 155 may be formed on the anti-fall frame 150 for exposing the anti-fall frame 150 at the upper portion of the entry hole 120 so that a worker inside the anti-fall frame 150 can lift the anti-fall frame 150 upward.

[0052] The upper end of the anti-fall frame 150 is connected to the upper end of the barrier film component 170. When the anti-fall frame 150 is moved upward, the folded barrier film component 170 unfolds in the film component receiving groove 123 to cover the surrounding of the anti-fall frame 150 to prevent pedestrians from falling into the entry hole 120.

[0053] Of course, the lower end of the barrier film component 170 can be fixedly set at the lower end of the film component receiving groove 123. If it moves downward into the barrier component, the barrier film component 170 can be folded and inserted into the film component receiving groove 123.

[0054] On the other hand, when the manhole cover 121 is open, when the main body access door 140 enters the manhole body 110, in order to prevent pedestrians from falling into the entry hole 120, the opening and closing of the manhole body 110 can be restricted by the safety opening restriction part 160 so that entry can only be made when the anti-fall frame 150 is located at the upper part of the entry hole 120.

[0055] like Figure 3 As shown, the safety opening limiting portion 160 can limit the opening and closing of the main body entrance door 140. An opening limiting hole 161 is formed in the main body entrance door 140, and an opening limiting frame portion 163 inserted into the opening limiting hole 161 is formed in the anti-fall frame 150. The opening limiting frame portion 160 is inserted into the opening limiting hole 161. Therefore, the main body entrance door 140 is opened only when the opening limiting frame portion 163 detaches upward from the opening limiting hole 161.

[0056] Since the opening limiting frame portion 163 extends from the anti-fall frame 150 located at the upper part of the main body entrance and exit door 140 through the opening limiting hole 161 to the interior of the inspection well body 110, the safety opening limiting portion 160 can open the main body entrance and exit door 140 only when the opening limiting frame portion 163 is moved upward in a manner that is detached from the opening limiting hole 161 and the anti-fall frame 150 is exposed from the entrance hole portion 120.

[0057] That is, the safety opening restriction portion 160 may restrict the opening and closing of the main body access door 140 , and open the main body access door 140 after taking a precautionary measure to prevent a pedestrian from falling into the entry hole 120 via the anti-fall frame 150 .

[0058] Among them, since the open limiting frame part 163 needs to move the anti-fall frame 150 upward according to the length L inserted from the open limiting hole 161 to the inside of the inspection well body 110, the anti-fall frame 150 can move upward from the entrance hole part 120 to the length L of the open limiting frame 163 and be exposed to the outside.

[0059] In this case, the opening limiting frame portion 163 passes through the opening limiting hole 161 and is supported inside the inspection well body 110. The weight of the opening limiting frame portion 163 is transferred to the body entrance door 140, thereby preventing the body entrance door 140 from being damaged such as bending or sagging.

[0060] When the opening limiting hole 161 is penetrated, the opening limiting frame portion 163 may be formed at a position of the anti-fall frame 150 that is offset from the connection unit 220 and the communication cable 210 located at the lower portion of the inspection well body 110 .

[0061] The opening limiting frame portion 163 may be formed at the anti-fall frame 150 , a rod provided around the anti-fall frame 150 , or extended downward from the vertical frame 153 of the anti-fall frame 150 .

[0062] Moreover, as the opening limiting frame portion 163 detaches upward from the opening limiting hole 161, when the main body entrance and exit door 140 is opened, the lower end of the opening limiting frame portion 163 is hung on the upper end of the main body entrance and exit door 140 to support the lower end of the opening limiting frame portion 163 in a state where the anti-fall frame 150 is exposed from the entrance hole portion 120.

[0063] Among them, although the embodiment describes placing the end of the opening limiting frame portion 163 on the upper part of the main body entrance door 140, a frame support portion may also be protrudingly formed in the entry hole portion 120 for placing the end of the opening limiting frame portion 163, which can be supported when the anti-fall frame 150 is moved upward from the entry hole portion 120.

[0064] On the other hand, the main body entrance door 140 may be provided with a pollution detection sensor 141 on the bottom surface facing the interior of the inspection well body 110, which is used to measure the internal air pollution degree of the inspection well body 110. A warning light 143 may be provided on the upper surface of the main body entrance door 140 facing the entrance hole 120. When the internal air of the inspection well body 110 is polluted, the information measured by the pollution detection sensor 141 indicates danger.

[0065] The staff at the entrance hole 120 can understand the internal air pollution of the inspection shaft body 110 based on the indication of the warning light 143, and can pre-identify the risks caused by opening the main body to enter and exit the door 140 based on the understood pollution level.

[0066] When the interior of the manhole body 110 is normal, the warning light 143 emits green light, and when the pollution detection sensor 141 detects pollution, it emits red light. Alternatively, it can be switched from the off state to the on state only when pollution is detected.

[0067] like Figure 4 As shown, in order to eliminate the polluted air based on the internal pollution level of the inspection well body 110 indicated by the warning light 143, a fan setting portion 157 can be formed on the anti-fall frame 150, and a ventilation fan 180 is provided to blow fresh air from the outside into the inspection well body 110 in a manner that generates positive pressure inside the inspection well body 110 to achieve ventilation.

[0068] The fan setting part 157 is located at the upper end part of the anti-fall frame 150. If the staff entering from the entrance hole 120 confirms the internal contamination of the inspection well body 110 through the warning light 143, then after setting the ventilation fan 180 in the fan setting part 157, the anti-fall frame 150 is lifted upward to release the fixation of the main body entrance door 140 by the opening restriction frame part 163. When the ventilation fan 180 is started, as the main body entrance door 140 is opened, external air is provided to the inspection well body 110 through the entrance hole 120, so that the contaminated air in the inspection well body 110 is discharged through the laying pipe part 130, thereby ventilating the contaminated air.

[0069] In this case, since the ventilation fan 180 blows external air into the manhole body 110 for ventilation, as positive pressure is generated inside the manhole body 110, the pipe portion 130 can be used to prevent contaminated air from flowing into the manhole body 110.

[0070] The ventilation fan 180 is rotated by a driving motor and can work in a manner of supplying air toward the inlet hole 120 . The edge portion of the ventilation fan 180 is placed on the fan setting portion 157 formed on the anti-fall frame 150 , and the ventilation fan 180 can be installed and removed at the fan setting portion 157 .

[0071] The following describes the functions and effects of each structure.

[0072] In the inspection well 100 for protecting communication cables in a public house according to an embodiment of the present invention, the inspection well body 110 is buried underground, and an entry hole 120 is formed in the inspection well body 110, extending to the ground for entering the interior of the inspection well body 110 from the ground.

[0073] A laying pipe portion 130 is connected to the side of the inspection well body 110 for laying a communication cable 210 . The communication cable 210 and the communication cable 210 laid inside the laying pipe portion 130 are connected inside the inspection well body 110 by a connecting unit 220 .

[0074] A body access door 140 is provided between the manhole body 110 and the entry hole 120 for entering the manhole body 110 through the entry hole 120 or blocking entry, and slides horizontally in the door slot 111 to open and close the manhole body 110 .

[0075] A fall prevention frame 150 is provided inside the entrance hole 120 and is composed of a plurality of ring frames 151 and a vertical frame 153. The ring frames 151 are arranged in a plurality so as to be able to slide up and down in the entrance hole 120. The vertical frame 153 is used to vertically connect the plurality of ring frames 151.

[0076] A fan installation portion 157 for placing a ventilation fan 180 is protrudingly formed on the inner periphery of the upper end of the fall prevention frame 150 .

[0077] A film receiving groove 123 is formed around the inlet 120 . A barrier film 170 folded in a corrugated shape with the anti-fall frame 150 located inside the film receiving groove 123 is provided. The inner circumference of the barrier film 170 is larger than the diameter of the anti-fall frame 150 .

[0078] The upper end of the barrier film component 170 can be connected to the upper end of the anti-fall frame 150 , and the lower end of the diaphragm component 170 is fixedly disposed at the lower end of the film component receiving groove 123 .

[0079] A safety opening restriction portion 160 is formed between the anti-fall frame 150 and the main body entrance door 140 for restricting the opening of the main body entrance door 140 . Before measures are taken in advance, the main body entrance door 140 cannot be opened to prevent pedestrians from falling into the entry hole 120 through the anti-fall frame 150 .

[0080] A plurality of opening limiting frame portions 163 are formed in the safety opening limiting portion 160, extending downward from the ring frame 151 of the anti-fall frame 150, and an opening limiting hole 161 is formed in the main body entrance door 140 for inserting the opening safety frame portion through. As the opening safety frame portion is inserted through, the main body entrance door 140 is opened only when the opening limiting frame portion 163 is removed.

[0081] According to the above structure, when entering from the entry hole 120 for inspecting or connecting the communication cable 210, the inspection well 100 for protecting the communication cable in the public housing according to the embodiment of the present invention needs to open the inspection well cover 121.

[0082] If the inspection well cover 121 is opened, the staff can enter the lower part of the entry hole 120 through the ring frame 151 of the anti-fall frame 150 located inside the entry hole 120 .

[0083] If it is located at the lower part of the entry hole 120, the main body entrance door 140 needs to be opened in order for the staff to enter the interior of the inspection well body 110. However, the opening of the main body entrance door 140 is restricted by the safety opening restriction part 160. Therefore, in order to release the restriction of the safety opening restriction part 160, it is necessary to lift the anti-fall frame 150 upward through the frame handle 155 of the anti-fall frame 150.

[0084] When the anti-fall frame 150 is lifted upward, the upper end of the anti-fall frame 150 is exposed to the upper part of the entrance hole 120. As the barrier film component 170 connected to the upper part of the anti-fall frame 150 in a folded state is unfolded, pedestrians can be prevented from falling into the entrance hole 120.

[0085] On the other hand, when the anti-fall frame 150 is lifted upward, the opening limiting frame portion 163 extending along the lower part of the anti-fall frame 150 is detached from the opening limiting hole 161 formed in the main body access door 140. After the main body access door 140 is slid toward both sides to open the inspection well body 110, the interior of the inspection well body 110 can be entered and the communication cable 210 can be maintained and repaired through the connecting unit 220.

[0086] In this case, even if the main body entrance door 140 is inserted into the door groove 111, the main body entrance door 140 cannot be fully inserted. Therefore, the end of the open limiting frame portion 163 can be placed on the upper surface of the main body entrance door 140 exposed from the door groove 11 or the frame support portion protruding from the entrance hole portion 120 to make the anti-fall frame 150 in an upward state in the entrance hole portion 120. Therefore, the staff does not need to continuously lift the anti-fall frame 150.

[0087] On the other hand, when the interior of the manhole body 110 is polluted, the staff entering through the entrance hole 120 can detect the pollution through the pollution detection sensor 141 and judge the degree of air pollution through the warning light 143 set on the main body entrance door 140.

[0088] The staff can wear a breathing device such as a mask before lifting the anti-fall frame 150 upwards. Then, with the replacement air fan 180 hung on the fan setting part 157 located on the upper part of the anti-fall frame 150, lift the anti-fall frame 150 upwards through the frame handle 155 to release the opening restriction of the main body entrance and exit door 140 and then start the replacement air fan 180.

[0089] If the ventilation fan 180 is working, the staff can enter and exit the door 140 by sliding the main body open.

[0090] If the main body entrance door 140 is opened, ventilation is achieved by allowing external air to flow into the interior of the inspection well body 110 through the ventilation fan 180. As the external air flowing into the inspection well body 110 disperses through the laid pipe portion 130, positive pressure can be generated inside the inspection well body 110 to prevent contaminated air from flowing into the inspection well body 110 through the laid pipe portion 130.

[0091] On the other hand, after the work on the inspection well body 110 is completed, the staff needs to move from the inspection well body 110 to the access hole 120 and seal the inspection well body 110 by closing the body access door 140 for opening the inspection well body 110 .

[0092] If the inspection well body 110 is sealed through the main body access door 140, the anti-fall frame 150 located above moves downward.

[0093] At this time, the opening restriction frame portion 163 of the anti-fall frame 150 corresponds to the opening restriction hole 161 formed in the main body entrance door 140 , and the anti-fall frame 150 is moved downward in a fixed state.

[0094] When the anti-fall frame 150 is moved downward, the opening limiting frame portion 160 is inserted into the opening limiting hole 161 , thereby limiting the opening of the main body access door 140 .

[0095] If the anti-fall frame 150 moves downward, the barrier film member 170 located around the upper portion of the anti-fall frame 150 is folded again and accommodated in the film member accommodation groove 123 .

[0096] When the anti-fall frame 150 is completely lowered to the inside of the entrance hole 120, if the anti-fall frame 150 is provided with a ventilation fan 180, the staff removes the ventilation fan 180 from the fan setting part 157, moves from the entrance hole 120 to the ground through the ring frame 151 of the anti-fall frame 150, and uses the inspection manhole cover 121 to cover the upper part of the entrance hole 120 to complete the work.

[0097] Therefore, the inspection shaft 100 for protecting communication cables in a public housing according to the embodiment of the present invention does not need to separately provide equipment for preventing falling into the entry hole 120 because the anti-fall frame 150 is provided inside the entry hole 120 .

[0098] Furthermore, in order to open the main body entrance door 140, the anti-fall frame 150 needs to be moved upward in the entrance hole portion 120 through the safety opening limiting portion 160. Even if safety measures based on the anti-fall device are not taken, the function of the anti-fall device can be automatically executed by the protrusion of the anti-fall frame 150, so that work can be carried out easily.

[0099] Furthermore, when the anti-fall frame 150 rises, the barrier film member 170 may be deployed to surround the anti-fall frame 150 , thereby preventing a pedestrian from falling into the entry hole 120 .

[0100] In addition, a main body entrance door 140 is provided in the inspection well body 110. Even if the internal air of the inspection well body 110 is polluted, the staff entering through the entrance hole 120 can prevent suffocation accidents caused by polluted air. Moreover, a pollution detection sensor 141 and a warning light 143 are provided in the main body entrance door 140. Therefore, before entering the inspection well body 110, measures can be taken in advance and suffocation accidents can be prevented by understanding the air pollution status.

[0101] Furthermore, the ring frame 151 of the anti-fall frame 150 performs a step function, and since there is no need to separately provide a step for entering and exiting the entry hole 120 , construction costs can be reduced.

[0102] Furthermore, the anti-fall frame 150 is formed with a fan installation portion 157 for installing a ventilation fan 180 . Therefore, when the air in the manhole body 110 is polluted, ventilation can be performed by the ventilation fan 180 to prevent suffocation accidents caused by polluted air.

[0103] Although the embodiments of the present invention have been described above, the scope of protection claimed by the present invention is not limited thereto. All changes and modifications that can be easily made by ordinary technicians in the technical field to which the present invention belongs based on the embodiments of the present invention within the scope of equivalents are within the scope of protection claimed by the present invention.

[0104] Description of Reference Signs

[0105] 100: Inspection well for communication cable protection in public residential buildings

[0106] 110: Inspection well body 111: Door slot

[0107] 120: Entrance hole 121: Inspection manhole cover

[0108] 123: Membrane component storage groove 130: Laying pipe part

[0109] 140: Main body entrance door 141: Pollution detection sensor

[0110] 143: Warning light 150: Anti-fall frame

[0111] 151: Ring frame 153: Vertical frame

[0112] 155: Frame handle 157: Fan installation part

[0113] 160: Safety opening limiter 61: Opening limiter hole

[0114] 163: Opening restriction frame 170: Barrier film component

[0115] 180: Ventilation fan 210: Communication cable

[0116] 220: Connection unit

Claims

1. A manhole for protecting communication cables in a public residence, comprising: The manhole body is formed with a connection unit for connecting a communication cable; as well as The entry hole extends vertically from the upper part of the inspection well body to the ground, so that workers can enter the inspection well body. The invention is characterized by comprising: an anti-fall frame, exposed at the upper portion of the entry hole and arranged inside the entry hole in a manner capable of sliding up and down, for preventing falling into the entry hole; A main body access door is slid in the horizontal direction from a position connected to the entry hole portion in the inspection well body to open and close the inspection well body; and The safety opening limiting portion exposes the anti-fall frame to the upper portion of the entry hole portion, and limits the opening of the main body entrance door by the up and down movement of the anti-fall frame in the entry hole portion, so as to open the main body entrance door only in response to falling into the entry hole portion.

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