JP3002950U - Temporary entrance for underground construction - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a temporary entrance for underground construction that improves lighting and ventilation without sacrificing safety to third parties and also improves convenience in cable wiring. [Structure] The temporary entrance for underground work of the present invention is provided near the exit on the ground side of the temporary stairs connecting the ground and the underground, and is arranged substantially opposite to the door 22 with the door 22 sandwiched therebetween. It is composed of a pair of side wall portions 23 and a roof portion 24 having a louver structure and extending above the side wall portions 23.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a temporary entrance for underground construction used in underground construction.

[0002]

[Prior art]

 In underground works such as subways, workers use a predetermined temporary staircase to descend from the ground to the underground work area, but a temporary entrance for underground work may be provided at the aboveground side exit of such temporary staircase.

FIG. 4 shows an example of a conventional temporary doorway for underground construction.

As can be seen in the figure, the temporary entrance / exit 1 for underground work is arranged so as to surround the opening 3 of the lining plate 2 spread so as to cover the underground work area, and to prevent falling. 4 and a door 6 provided near the entrance to the temporary stairs 5.

[0005]

[Problems to be solved by the device]

 However, due to the provision of the enclosure 4, there was a considerable difference in brightness between the inside and outside of the temporary entrance 1 for underground construction.

Therefore, when a worker who is accustomed to the brightness of the outside opens the door 6 and enters the inside, it becomes black for a moment and the feet cannot be seen. On the other hand, if a worker, who was accustomed to the darkness of the interior, goes outside, he could be blinded and lead to an unexpected accident.

[0007] Furthermore, since the door 6 is closed during the construction so that a third person does not enter by mistake, it may cause a problem of poor ventilation, but on the other hand, for wiring the cable, or for closing the door only. If you forget it, the door 6 will be left open, which may pose a safety problem for passersby.

The present invention has been made in consideration of the above-mentioned circumstances, and improves the lighting and ventilation without impairing the safety for a third party, and for the underground construction in consideration of the cable wiring and the like. The purpose is to provide a temporary doorway.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the temporary entrance for underground work of the present invention is, as described in claim 1, a door at a temporary entrance for underground work provided near the exit on the ground side of the temporary stairs connecting the ground and the underground. Part, a pair of side wall parts arranged substantially opposite to each other with the door part in-between, and a roof part having a louver structure extending above the side wall part.

Further, the temporary entrance for underground construction of the present invention is formed by forming the side wall portion of claim 1 into a fan shape composed of two straight line portions forming an angle close to a right angle and an arc portion sandwiched by the straight line portions. One of the straight portions is a lower edge and the other is a side edge that forms a boundary with the door portion, and the blades that constitute the louver structure are arranged along the arc portion.

Further, the temporary entrance for underground construction of the present invention is formed by forming a louver constituting the louver structure according to any one of claims 1 and 2 with a transparent or translucent member.

In addition, the temporary entrance for underground construction of the present invention is such that the arrangement angle of the door portion according to any one of claims 1 and 2 is 5 ° from the vertical direction to the closing direction of the door constituting the door portion. The door is closed within a range that does not exceed the limit so that the door is naturally closed by the action of gravity.

In addition, the temporary entrance for underground construction of the present invention is provided with a cable through hole in the side wall portion according to any one of claims 1 and 2.

Further, the temporary entrance for underground construction of the present invention is a punching metal in which at least a part of the side wall portion and the door portion according to any one of claims 1 to 2 are provided with a large number of through holes of a predetermined shape. It is composed of.

[0015]

[Action]

 In the temporary doorway for underground construction of the present invention, the roof part which is laid over the side wall part has the louver structure, so that the lighting and ventilation are improved.

When the side wall portion is formed in a fan shape and the louver plates constituting the louver structure of the roof portion are arranged along the arc portion of the fan, the entire structure of the temporary entrance / exit for underground construction is simplified and the roof portion is Has a rounded and soft design.

When the louvered louver board is made of a transparent or semi-transparent member, the above-mentioned lighting performance is further improved.

When the arrangement angle of the door portion is inclined from the vertical direction within the range of not more than 5 ° in the closing direction of the door forming the door portion, the door naturally closes due to the action of gravity.

When the cable through hole is provided in the side wall portion, it is possible to pass the cable of the electric equipment or the like without newly providing a hole in the side wall portion.

When at least a part of the side wall portion and the door portion is made of punching metal provided with a large number of through holes having a predetermined shape, the above-mentioned ventilation is further improved.

[0021]

【Example】

 Hereinafter, embodiments of the temporary entrance for underground construction of the present invention will be described with reference to the accompanying drawings. It should be noted that parts and the like that are substantially the same as those of the prior art are designated by the same reference numerals and the description thereof is omitted.

1A and 1B show a temporary entrance / exit 21 for underground work according to the present embodiment. FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a rear view. Further, FIG. 2 is a perspective view showing the temporary entrance 21 for underground construction of this embodiment.

As can be seen from these figures, the temporary entrance / exit 21 for underground construction of the present embodiment includes a door portion 22 through which a worker enters and exits, and a pair of side walls arranged substantially opposite to each other with the door portion 22 interposed therebetween. It is composed of a part 23 and a roof part 24 of a louver structure which is horizontally provided above the side wall part 23.

As can be seen clearly in FIG. 1B, the door portion 22 is inclined at an arrangement angle from the vertical direction in the range not exceeding 5 ° in the closing direction of the door 26, preferably about 1 °. Is automatically closed by the action of gravity.

On the upper side of the door 26, a so-called punching metal 27 having a large number of through holes of a predetermined shape is attached.

The side wall portion 23 is formed in a fan shape composed of two straight line portions forming an angle close to a right angle and an arc portion sandwiched between the straight line portions, and one of the straight line portions is a lower edge and the other is the door portion 22. It is a side edge that forms the boundary with. A punching metal 27 is attached near the center of the side wall 23 as in the door 22, and a cable through hole 29 is provided below the punching metal 27.

The roof portion 24 has a so-called louver structure in which a plurality of blades 25 are appropriately arranged along the circular arc portion of the side wall portion 23, and has a structure that prevents the entry of rain while performing daylighting and ventilation. Has become.

The wing plate 25 is preferably made of a transparent or translucent material, for example, a plastic material such as polycarbonate or unsaturated polyester.

FIG. 3 is a perspective view showing a state in which the temporary construction entrance / exit 21 for underground construction of the present embodiment is arranged in the vicinity of the temporary staircase 5 connecting the above-ground and underground work areas (not shown).

As described above, in the temporary construction entrance / exit 21 for underground construction of the present embodiment, the roof portion 24 that is laid horizontally above the side wall portion 23 has a louver structure, and the blades that make up the louver structure are transparent. Alternatively, since it is made of a semi-transparent member, natural light on the ground passes through the louver structure louver 25 and is inserted inside. In addition, light also enters inside through the holes in the punching metal 27 attached to the side wall portion 23 and the door 26.

Therefore, inside the temporary entrance / exit 21 for underground construction, the illuminance is an intermediate level between the brightness on the ground and the darkness under the ground, and the eyes of people who enter and exit are accustomed to the internal darkness or the external brightness in advance. It will be.

Therefore, the worker will not feel suddenly dark and step out of the temporary stairs, or, on the contrary, will suddenly feel dazzling and will not encounter an unexpected accident on the road surface. You will be able to go back and forth.

It is possible to save utility costs as compared with the case where such a safety measure is performed by artificial lighting.

Further, since the roof portion has a louver structure and the punching metal is attached to the door and the side wall portion, natural ventilation can be performed between the ground and the underground, and the underground working environment is Greatly improved health and hygiene.

Further, since the side wall portion 23 is formed in a fan shape and the blades 25 forming the louver structure of the roof portion 24 are arranged along the arc portion of the fan, the material area can be reduced and the manufacturing cost can be suppressed. You can

Further, since the roof portion 24 has a rounded and soft design, it is possible to improve the working environment in a psychological manner by giving the operator comfort and the like.

Further, since the arrangement angle of the door portion 22 is tilted from the vertical direction to the direction in which the door 26 is closed by about 1 °, even if the worker forgets to close the door 26, the door 26 is not affected by gravity. The action will cause it to close naturally.

Therefore, it is possible to reduce the risk that a third party, especially a child, may enter the temporary entrance 21 for underground work with curiosity.

Further, since the cable through hole 29 is provided in the side wall portion 23, it becomes easy to wire a cable for electrical equipment or the like, and it is not necessary to newly provide a through hole or leave the door open.

In the present embodiment, the wing plate is formed of a transparent or semi-transparent member to improve the daylighting property. However, if it is desired not to directly enter the light, the wing plate is formed of an opaque material. However, it is preferable to cover the surface with a light-reflecting material as needed.

In such a configuration, the natural light on the ground is indirectly inserted into the inside while being reflected between the louvered blades.

[0042]

[Effect of device]

 As described above, the temporary entrance for underground work of the present invention is a temporary entrance for underground work provided near the exit on the ground side of the temporary stairs connecting the ground and the underground, and the door part is sandwiched between the door part and the door part. Since it is composed of a pair of side walls that are arranged almost opposite to each other and a roof part with a louver structure that is installed above the side walls, it improves light collection and ventilation without compromising safety for third parties. In addition to being able to do so, the convenience of cable wiring and the like is also improved.

[0043]

[Brief description of drawings]

FIG. 1 (a) is a front view of a temporary entrance / exit for underground construction according to the present embodiment, (b) is a side view thereof, and (c) is a rear view thereof.

FIG. 2 is a perspective view of a temporary entrance for underground construction according to the present embodiment.

FIG. 3 is a perspective view of the temporary doorway for underground work according to the present embodiment as seen from another direction.

FIG. 4 is a perspective view of a conventional temporary doorway for underground construction.

[Explanation of symbols]

 5 Temporary stairs 21 Temporary entrance / exit for underground work 22 Door part 23 Side wall part 24 Roof part 25 Feather 26 Door 27 Punching metal 29 Cable through hole

Claims (6)

[Scope of utility model registration request] 1. A temporary doorway for underground construction provided in the vicinity of an exit on the ground side of a temporary stairway connecting the ground and the underground, the door section, and a pair of side wall sections arranged substantially opposite to each other with the door section interposed therebetween, Temporary entrance for underground construction, which consists of a louvered roof that is installed above the side wall. 2. The side wall portion is formed in a fan shape composed of two straight line portions forming an angle close to a right angle and an arc portion sandwiched between the straight line portions, and one of the straight line portions is a lower edge and the other is the The temporary entrance / exit for underground construction according to claim 1, wherein the louver structure constitutes the louver structure and is arranged along the arc portion while forming a side edge that forms a boundary with the door portion. 3. The temporary entrance / exit for underground work according to claim 1, wherein the blades forming the louver structure are formed of a transparent or translucent member. 4. The door is arranged at an angle of inclination from the vertical direction within a range not exceeding 5 ° in a closing direction of a door constituting the door so that the door is naturally closed by the action of gravity. The temporary entrance / exit for underground construction according to claim 1. 5. The temporary entrance / exit for underground construction according to claim 1, wherein a cable through hole is provided in the side wall portion. 6. The temporary construction entrance / exit for underground construction according to claim 1, wherein at least a part of the side wall portion and the door portion is made of punching metal provided with a large number of through holes of a predetermined shape.