Evacuation door device for tunnels

Abstract

When an evacuation passage 4 with an entrance 4a is provided on at least one side of the roadway 2 in the tunnel, the opening and closing of an evacuation door is prevented from being hindered when a landing 5 leading to the entrance 4a is made long in the front-rear direction so that a stretcher T can enter and exit. [Solution] The first and second evacuation doors 6, 7 are provided as the evacuation doors that open and close the landing 5, and are of the type that can be pulled both forward and backward, allowing the entry and exit of a stretcher T, while the front-to-back lengths of the first and second evacuation doors 6, 7 are kept short so that opening and closing operations are not hindered.

Description

[Technical Field]

[0001] The present invention relates to the technical field of emergency door devices for tunnels installed in passageways such as railways and roads. [Background technology]

[0002] Generally, tunnels are provided in roadways such as railways and roads, and when such tunnels are long, emergency door systems are installed in anticipation of accidents inside the tunnel. Such emergency door systems are configured to connect the roadway to an emergency route attached to the roadway with an emergency passage, so that evacuees attempting to escape from the roadway can reach the emergency route via the emergency passage. In an emergency door device configured in this way, if an evacuee is left behind on the roadway inside the tunnel, it is expected that emergency personnel will enter the tunnel from the evacuation route via the evacuation passage and place the evacuee on a stretcher and evacuate. However, in the conventional emergency door device, the emergency door is of a single-sliding type, and therefore the landing serving as the entrance to the emergency passage has a narrow front-to-rear width (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-138431 Summary of the Invention [Problem to be solved by the invention]

[0004] For this reason, in the conventional system, the front-to-back width of the landing is shorter (narrower) than the length of the sideways stretcher carrying the evacuee, which hinders emergency personnel from carrying the stretcher and makes emergency evacuation difficult. Therefore, when the landing is made long in the front-to-back direction so that the stretcher can be transported, the evacuation door also becomes long in the front-to-back direction to correspond to the long landing, which causes problems such as the weight of the evacuation door becoming heavy and causing problems in opening and closing it. These are the issues that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention was created in view of the above-mentioned circumstances and with the aim of solving these problems. The invention of claim 1 is an emergency door device for a tunnel comprising: an evacuation passageway in which an entrance for evacuees is provided on at least one side of the roadway inside a tunnel through which vehicles travel in a longitudinal direction, for evacuating people to take refuge; an emergency door that moves in a longitudinal direction to open and close a landing leading to the entrance, and which, when open, is stored in a door pocket space on the door tail side continuing from the landing; and an opening / closing assisting means that assists the opening and closing operation of the emergency door, wherein the opening / closing assisting means is arranged in the door pocket space, and the emergency door is configured as a double-pull type in which a pair of front and rear door bodies slide outward in the longitudinal direction. The invention of claim 2 is an emergency door device for a tunnel as described in claim 1, characterized in that the landing is configured with a front-to-back width corresponding to the front and back sliding emergency doors, door pocket spaces are provided on both the front and back sides continuing from both the front and back ends of the landing, the entrance to the emergency passage is provided on at least one of the door pocket spaces in the front-to-back direction of the landing, and opening / closing assist means are provided separately in the door pocket spaces corresponding to each emergency door. The invention of claim 3 is an emergency door device for a tunnel as described in claim 1 or 2, characterized in that the front-to-back width of the landing and the opening width when the front and rear emergency doors are open are set to wide dimensions that allow stretchers carrying injured people to enter and exit. The invention of claim 4 is an emergency door device for a tunnel as described in claim 1, characterized in that the opening and closing assistance means is arranged in a location outside the evacuation space where the bodies of evacuees escaping through the evacuation passage reach. The invention of claim 5 is an emergency door device for a tunnel as described in claim 4, characterized in that the opening and closing assistance means includes a self-closing device that automatically closes an open emergency door, and the self-closing device is arranged in an outer space beyond the evacuation space. The invention of claim 6 is an emergency door device for a tunnel as described in claim 5, characterized in that the automatic closing device is configured with various component devices including a fixed pulley provided on the entrance side, an operating wire that is hung on the fixed pulley and connected to the emergency door, a wire winding section to which one end of the operating wire is connected and which winds up one end side of the operating wire that is slackened when the emergency door moves to open and pulled when it moves to close, and an automatic closing main body section to which the other end of the operating wire is connected and which winds up the other end side of the operating wire in a state where it is charged to move the emergency door to close when the emergency door moves to close, and which unwinds the other end side of the operating wire when the emergency door moves to open, and these various component devices are arranged in one outer space selected from the outer spaces consisting of an upper space beyond the evacuation space, a front-to-rear outer space, and a lateral space on the side wall side of the tunnel, or in a combination of two or more outer spaces. [Effects of the Invention]

[0006] By adopting the invention of claim 1, the first and second emergency doors installed inside the tunnel are of the double-pull type, which slide in opposite directions from front to back. As a result, even if the landing is long in the front-to-back direction, the individual emergency doors only need to be half the front-to-back width, which avoids them being too heavy and prevents them from interfering with the opening operation during an evacuation. By adopting the invention of claim 2, the landing is configured with a front-to-back width corresponding to the emergency doors that slide both front and back, door pocket spaces are provided on both the front and back sides of the landing continuing from both the front and back ends, emergency passages are provided on at least one of the door pocket spaces in the front-to-back direction of the landing, and opening / closing assistance means are provided separately in the door pocket spaces corresponding to each emergency door, so that the emergency doors can be of the front-to-back sliding type while providing assistance for smooth opening and closing of both emergency doors. By adopting the invention of claim 3, the front-to-back width of the landing and the opening width when the front and rear emergency doors are opened are set to wide dimensions that allow stretchers carrying injured people to enter and exit.As a result, there is no hindrance to the opening operation of the emergency doors, and it is also easy for stretchers carrying injured people to enter and exit, avoiding a loss of speed in rescue operations. By adopting the invention of claim 4, the opening / closing assisting means is arranged in a location outside the evacuation space where the bodies of evacuees escaping through the evacuation passage can reach, so that the evacuees can evacuate quickly without the opening / closing assisting means getting in the way of their evacuation. By adopting the invention of claim 5, when the opening and closing assistance means includes a self-closing device that automatically closes an open emergency door, the self-closing device is arranged in an outer space beyond the evacuation space, preventing evacuees from coming into contact with the self-closing device and ensuring the self-closing function of the open emergency door. By making the invention of claim 6, the components that make up the self-closing device, such as the fixed pulley, operating wire, wire winding section, and self-closing main body section, are arranged in a space selected from the outer space consisting of the upper space beyond the evacuation space, the outer space in the front-to-rear direction, and the lateral space on the side wall side of the tunnel.As a result, the door pocket space can be effectively utilized, the self-closing device does not get in the way of the evacuees' evacuation, and malfunctions in the self-closing device can be prevented. [Brief explanation of the drawings]

[0007] [Figure 1] This is a longitudinal sectional front view of the main part of the tunnel. [Figure 2] FIG. 2 is a side view showing the emergency door device in a fully closed state. [Figure 3] FIG. 2 is a plan view showing the emergency door device in a fully closed state. [Figure 4] FIG. 2 is a side view showing the emergency door device in a fully open state. [Figure 5] FIG. 2 is a plan view showing the emergency door device in a fully open state. [Figure 6] 10 is a side view showing a half-open state in which the first emergency door of the emergency door device is operated to open. FIG. [Figure 7] 10 is a plan view showing a half-open state in which the first emergency door of the emergency door device is operated to open. FIG. [Figure 8] 10 is a side view showing a state in which the first emergency door of the emergency door device is manually operated from a half-open state in which it has been opened to a closed state. FIG. [Figure 9] 10 is a plan view showing a state in which the first emergency door of the emergency door device is manually operated from a half-open state in which it has been opened to a closed state. FIG. [Figure 10] FIG. 2 is a longitudinal sectional front view of a main part of the emergency door device. [Figure 11] 10A and 10B are a plan view and a side view of the main part showing the first emergency door in a closed state. [Figure 12] 10A and 10B are a plan view and a side view of the main part showing the first emergency door in an open state. [Figure 13] 10A and 10B are a plan view and a side view of the main part showing the state in which the first emergency door has been manually closed. [Figure 14] (A) and (B) are a plan view and a side view of the restricting portion of the automatic closing device, and (C) and (D) are a front view of the operating portion and a front view of the restricting device. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a tunnel body (tunnel), which has a cylindrical shape elongated in the front-to-rear direction and is formed by an appropriate construction method such as a shield tunneling method, with a roadway 2 for vehicles formed in the upper half and an evacuation route 3 in the lower half, separated by a partition section 1b where the road surface of the roadway 2 is formed. The roadway 2 and the evacuation route 3 are connected via an evacuation passage 4 provided on one side of the roadway 2 in the left-right direction (road width direction), all as in the conventional case. Incidentally, although the evacuation passage 4 in this embodiment is slope-shaped (slide-shaped), it may be configured in any manner as long as it is a passageway (evacuation passageway) through which evacuees can escape, such as in the form of steps. Furthermore, the evacuation route 3 can be used not only as a transportation route for personnel and materials for maintenance of facilities inside the tunnel, but also as a route for emergency vehicles in the event that an accident or fire occurs inside the tunnel and the roadway 2 becomes impassable.

[0009] The entrance 4a of the evacuation passage 4 is opened on one of the left and right sides of the roadway 2, and the entrance 4a is provided so as to continue to one of the front and rear edges of a landing 5 formed on the side, so that evacuees who have evacuated along the roadway 2 can enter the entrance 4a from the landing 5, go down the evacuation passage 4, and reach the evacuation route 3, thereby making an emergency escape. In this embodiment, the evacuation passage 4 is configured to extend downhill from an entrance 4a, which is located adjacent to the edge of the landing 5 on one side in the front-to-back direction, outward on one side in the front-to-back direction and inward in the left-to-right direction, to the evacuation route 3.

[0010] In the structure configured as above, the landing space X where the landing 5 is provided is normally covered by first and second pull-type evacuation doors 6, 7 that slide outward in the front-to-rear direction so as to be able to be opened and closed freely. By providing the first and second evacuation doors 6, 7 in this manner, the landing 5 covered by the first and second evacuation doors 6, 7 can be set to have a long front-to-rear length, and in this embodiment, it is set to have a front-to-rear length (for example, 2 m) sufficient for two people to carry a stretcher T carrying a sick or injured person inside.

[0011] The first and second emergency doors 6, 7 configured in this manner are configured in an inverted L shape with vertical surface portions 6a, 7a on the roadway 2 side and top surface portions 6b, 7b extending from the upper edges of the vertical surface portions 6a, 7a towards the tunnel side wall 1a, and the front and rear lower running rollers 6c, 7c provided at the lower ends of the vertical surface portions 6a, 7a and the front and rear upper running rollers 6d, 7d provided at the tips of the top surface portions 6b, 7b run in the front-to-back direction on upper and lower running rails 8, 9 provided on the roadway 2 side and the tunnel vertical wall side, so that the first and second emergency doors 6, 7 can be opened and closed separately between a closed position in which they cover the corresponding front and rear parts of the landing 5, and an open position in which they move outward in the front-to-back direction to expose the landing 5. In this case, the trailing edge portions of the first and second emergency doors 6, 7 and the first and second doorstop shells 10, 11 have a mating structure to enhance the sealing effect when closed. Also, the leading edge portions of the first and second emergency doors 6, 7 have a mating structure by attaching a mating plate to one of the leading edge portions to enhance the sealing effect when closed.

[0012] On either side of the landing space X where the landing 5 is provided, first and second door pocket spaces S1, S2 are provided in which the first and second emergency doors 6, 7 that have been moved to the open position are stored, and the first and second door pocket spaces S1, S2 are provided with first and second door pocket shells 10, 11 that cover and store the first and second emergency doors 6, 7 that have been moved to the closed position, but the first and second door pocket shells 10, 11 are slightly larger than the first and second emergency doors 6, 7 in order to cover and store the first and second emergency doors 6, 7 that have been moved to the open position, and are configured in an inverted L shape with top panels 10a, 11a and side panels 10b, 11b on the roadway 2 side. The first and second door pocket shells 10, 11 have top plates 10a, 11a attached to the tunnel side wall 1a via support brackets 14, while the top plates 10a, 11a are provided with support plates 14b that extend between the top plates 10a, 11a.

[0013] In one of the first door pocket spaces S1, an entrance 4a to the evacuation passage 4 is provided, continuing from one edge of the landing 5 in the front-to-rear direction.With this configuration, the first door pocket space S1 is used as a space to accommodate the first evacuation door 6 in the open position and also as a space where the evacuation passage 4 is formed, and the spaces with these two functions are configured to overlap. In contrast, the second door pocket space S2 is simply a space for accommodating the second emergency door 7 in the open position, and is configured so that no emergency passageway is provided. However, an emergency passageway 4 may also be provided on the second door pocket space S2 side. In this case, emergency passageways 4 are provided on both the front and rear sides of the landing 5, thereby facilitating the more rapid evacuation of evacuees.

[0014] In the emergency door device configured in this manner, first and second automatic closing devices 12, 13 for automatically closing (self-closing) the open first and second emergency doors 6, 7 are provided as one of the opening and closing auxiliary means for assisting the opening and closing operation of the first and second emergency doors 6, 7.The first and second automatic closing devices 12, 13 are existing general-purpose products, and their configuration will be briefly explained below. The opening and closing assist means provided in the emergency door device are not limited to the first and second automatic closing devices 12, 13, and may be, for example, a member device such as a balancer device (not shown) that adjusts the first emergency door 6 of the emergency door device so that it does not move to the lower end of the incline due to its own weight when the first emergency door 6 is provided on a sloped road surface. In this embodiment, two sets of fixed pulleys are provided on the upper frame member 14a described later, and one of the fixed pulleys 12a, 13a is for the first and second automatic closing devices 12, 13 described above, while the other fixed pulleys 16, 16 are configured to be used for the balancer device.

[0015] The first and second door pocket spaces S1, S2 are provided with first and second automatic closing devices 12, 13 for automatically closing (automatically closing) the corresponding first and second emergency doors 6, 7. The first and second automatic closing devices 12, 13 are configured with various member devices such as fixed pulleys 12a, 13a provided on the landing space X side, operating wires 12b, 13b hung on the fixed pulleys 12a, 13a, wire winding portions 12c, 13c to which the tips of one end side portions 12ba, 13ba of the operating wires 12b, 13b distributed by the fixed pulleys 12a, 13a are connected, and automatic closing main body portions 12d, 13d to which the tips of the other end side portions 12bb, 13bb are connected.

[0016] In this device, the first and second automatic closing devices 12, 13 differ only in the location of the above-mentioned components, and there is no functional difference between them.Therefore, next we will explain the configuration of the first automatic closing device 12 on the side where the evacuation passage 4 is provided, and as for the second automatic closing device 13, we will simply assign it a reference number corresponding to the reference number assigned to the first automatic closing device 12, and will omit a detailed explanation thereof. In the second automatic closing device 13, the fixed pulley 13a and the automatic closing main body 13d are mounted on a mounting base 17 erected in the second door pocket space S2.

[0017] The fixed pulley 12a is attached to an upper frame member 14a extending from the support plate 14b toward the upper part of the entrance 4a, while an operating part 12e is provided on the end edge of the first emergency door 6 on the door tail side via a support bracket 12ea, and one end side part 12ba of the operating wire 12b passes through the operating part 12e in a loose fit. Furthermore, a regulating device 12f is integrally provided on the other end side portion 12ba of the operating wire 12b, which abuts (or closely faces) the first door pocket space S1 side of the operating portion 12e when the first emergency door 6 is in the closed position, and regulates the relative movement of the operating wire 12b toward the self-closing main body portion 12d side with respect to the first emergency door 6.

[0018] The automatic closing function of the first automatic closing device 12 configured as above will now be described. First, when an evacuee opens the first emergency door 6, which is normally in a closed position, toward the first door pocket space S1, the operating part 12e moves toward the first door pocket space S1 together with the first emergency door 6. The movement of the operating part 12e toward the first door pocket space S1 results in the movement of one end side part 12ba of the operating wire 12b toward the wire winding part 12c, which is accompanied by the integral movement of the restricting tool 12f. As a result, one end side portion 12ba of the operating wire 12b becomes loose and is wound around the wire winding portion 12c, while the other end side portion 12bb is pulled and is unwound from the self-closing main body portion 12d.This winding and unwinding operation of the operating wire 12b continues until the first emergency door 6 reaches the open position and comes into contact with a stopper 15 provided in the first door pocket space S1 and stops.

[0019] When an evacuee who has entered the landing 5 manually closes the first emergency door 6 that has reached the open position in this way, and then evacuates from the entrance 4a to the emergency passage 4 and into the emergency route 3, the first emergency door 6 will move to the closed position. In this case, the operating part 12e will move together with the first emergency door 6, but because the operating wire 12b is loosely fitted through the operating part 12e, the first emergency door 6 will remain in the closed position together with the regulating device 12f and will not move. As a result, the first emergency door 6 will move to the closed position together with the operating part 12e, leaving the regulating device 12f behind, and the first emergency door 6 can be closed manually.

[0020] In contrast, if an evacuee who has entered the landing 5 evacuates to the evacuation route 3 via the evacuation passage 4 without manually closing the first evacuation door 6, the first evacuation door 6 will remain open. In this case, the timer function provided in the self-closing main body 12d will be activated, and after a preset timer time (for example, 60 seconds) has elapsed since the opening of the first evacuation door 6 stopped, the self-closing main body 12d will begin winding up the other end side 12bb of the operating wire 12b using the stored force, and in conjunction with this, the wire winding part 12c will pull and unwind one end side 12ba of the operating wire 12b. As a result of this movement caused by the pulling force of the operating wire 12b, the regulating device 12f presses against the abutting operating part 12e, forcibly moving the first emergency door 6 from the open position to the closed position, thereby causing the first emergency door 6 to close automatically. Incidentally, even if the aforementioned evacuee manually closes the first emergency door 6, causing the first emergency door 6 to move closed, leaving behind the regulating device 12f, after the timer time has elapsed, the self-closing main body part 12d will wind up the other end side part 12bb of the operating wire 12b, causing the regulating device 12f to move to a position where it abuts (or closely faces) the operating part 12e of the first emergency door 6, which is positioned in the closed position. Furthermore, 12eb is a guide portion provided at the tip of the operating portion 12e, through which one end side portion 12ba of the operating wire 12b passes freely (loosely fitted), and 12ec is a shock absorber provided between the guide portion 12eb and the operating portion 12e to absorb the impact when the regulating device 12f abuts against the guide portion 12eb.

[0021] In an emergency door device configured in this manner, the first automatic closing device 12 is arranged in a state where it overlaps the first door pocket space S1 together with the emergency passage 4, as described above, and there is a risk that an evacuee escaping through the emergency passage 4 may come into contact with the first automatic closing device 12. Therefore, in this embodiment, the range of the body of an evacuee sliding down the sliding board portion 4b of the evacuation passage 4, which is a slide, is virtually set as an evacuation space Z, and the first automatic closing device 12 is arranged in a space outside the evacuation space Z.

[0022] The evacuation space Z is defined by a narrow lower area Za between the left and right handrails 4c of the evacuation passage 4 and a wide upper area Zb above the left and right handrails 4c, and the upper area Zb can be set based on the average height of adult males who will be evacuees sliding down the sliding board 4b, for example. In the figure, Zx indicates the boundary line of the area defined as the evacuation space Z. The fixed pulley 12a that constitutes the first automatic closing device 12 is provided on the upper surface of the upper frame member 14a that extends from the support bracket 14 provided on the tunnel side wall 1a to a position above the upper range Zb, and is therefore positioned above the evacuation space Z. Furthermore, the wire winding portion 12c and the self-closing main body portion 12d are provided at the rear end (outside in the front-to-rear direction) of the door tail side of the first door pocket space S1, but the locations where the wire winding portion 12c and the self-closing main body portion 12d are provided are arranged above and outside the evacuation space Z, where the sliding plate portion 4b of the evacuation passage 4 descends, making the evacuation space Z lower than the entrance 4a. The operating wire 12b, which is arranged between the fixed pulley 12a and the wire winding portion 12c and the self-closing main body portion 12d, is also arranged outside the evacuation space Z (above in this embodiment), so that evacuees are prevented from swinging as much as possible.

[0023] In this embodiment configured as described above, the first and second emergency doors 6, 7 are provided as double-pull type emergency door devices that slide back and forth within the tunnel. As a result, even if the width of the landing 6 is long in the front-to-back direction, the front-to-back length of the first and second emergency doors 6, 7 only needs to be about half the length of the landing 6, which avoids the weight being heavy as would be the case if the doors were a single door, and prevents any problems with opening the doors during an evacuation. In this case, first and second door pocket spaces S1, S2 corresponding to the first and second emergency doors 6, 7 are provided on both the front and back of the landing space X where the landing 5 is provided, and the emergency passage 4 is arranged so as to overlap on the first door pocket space S1 side, allowing for smooth and rapid evacuation. Furthermore, first and second automatic closing devices 12, 13 that promote the automatic closing operation of the first and second emergency doors 6, 7 are provided separately in the corresponding first and second door pocket spaces S1, S2 as opening and closing assistance means to assist in the opening and closing of the first and second emergency doors 6, 7. As a result, even though the first and second emergency doors 6, 7 are of the double-pull type that slide back and forth, the automatic closing operation of the open first and second emergency doors 6, 7 can be ensured.

[0024] Furthermore, in this case, the length of the landing 5 from front to back is set to be wide enough to allow stretchers carrying injured people to enter and exit, and the wide landing 5 can be opened by the first and second evacuation doors 6, 7. As a result, by opening the first and second evacuation doors 6, 7, it becomes easy for stretchers T carrying injured people to enter and exit, thereby preventing a loss of speed in rescue operations. In this case, of the first and second door pocket spaces S1, S2 in which the first and second automatic closing devices 12, 13 that serve as opening and closing auxiliary means are provided, on the side of the first door pocket space S1 where the evacuation passage 4 is provided, the first automatic closing device 12 is arranged in a location outside the evacuation space Z that the bodies of evacuees escaping through the evacuation passage 4 reach, so that the first automatic closing device 12 does not get in the way of the evacuation, allowing the evacuees to evacuate quickly.

[0025] Furthermore, in this device, the components that make up the first automatic closing device 12 are positioned outside the evacuation space Z that the bodies of evacuees escaping through the evacuation passage 4 reach, so the first automatic closing device 12 does not get in the way of the evacuees' evacuation, allowing them to evacuate quickly and also ensuring the preservation of the first automatic closing device 12. In this case, the first automatic closing device 12 is composed of a fixed pulley 12a provided on the entrance 4a side, an operating wire 12b suspended from the fixed pulley 12a, a wire winding portion 12c to which one end side 12ba of the operating wire 12b is connected and which winds around the one end side 12ba which relaxes when the first emergency door 6 moves to open and is pulled when it moves to close, and a self-closing main body portion 12d to which the other end side 12bb of the operating wire 12b is connected and which winds up the other end side 12bb side of the operating wire 12b in a charged state to cause the first emergency door 6 to move to close when the first emergency door 6 moves to close, and which unwinds the other end side 12bb side of the operating wire 12b when it moves to open, and these component devices that make up the first automatic closing device 12 are arranged in outer spaces U1 and U2 that exceed (extend beyond) the range of the evacuation space Z. Specifically, the fixed pulley 12a, operating wire 12b, wire winding portion 12c and self-closing main body portion 12d that constitute the first self-closing device 12 are arranged in an upper space U1 beyond the evacuation space Z, an outer space U2 in the front-to-rear direction, and a space that is a combination of these spaces U1 and U2. As a result, the first automatic closing device 12 is arranged in the first door pocket space S1, effectively utilizing the outer spaces such as the upper space U1 beyond the evacuation space Z and the outer space U2 in the front-to-rear direction, thereby avoiding contact with evacuees and not interfering with the evacuation of evacuees, while also preventing malfunctions in the automatic closing device.

[0026] Of course, the present invention is not limited to the above embodiment, and the space secured in the first door pocket space S1 as the space for arranging the opening / closing auxiliary means may be not only the upper space U1 extending upward beyond the evacuation space Z, and the fore-and-aft outer space U2 extending outward in the fore-and-aft direction, but also the lateral space U3 extending beyond the evacuation space Z toward the tunnel side wall 1a. When various component devices constituting the opening / closing auxiliary means are arranged in the outer spaces U1, U2, and U3 beyond these evacuation spaces Z, the arrangement space for these component devices can be not just one outer space selected from the outer spaces U1, U2, and U3, but a composite outer space in which two or more outer spaces are appropriately selected. Furthermore, when the opening / closing auxiliary means is the first automatic closing device 12 as in this embodiment, the fixed pulley 12a and operating wire 12b can be arranged not only in the upper space U1 beyond the evacuation space Z and the outer space U2 in the fore-and-aft direction, but also in the lateral space U3 on the tunnel side wall 1a side, and even in an outer space that combines these. Similarly, the wire winding portion 12c and the self-closing main body portion 12d can be arranged in at least one outer space selected from the upper space U1 beyond the evacuation space Z, the outer space U2 in the front-to-rear direction, and the lateral space U3. Furthermore, when implementing the present invention, the outer space beyond the evacuation space Z is not limited to the above-mentioned upper space U1, the outer space U2 in the front-to-rear direction, and the lateral space U3. Of course, if an outer space other than these outer spaces can be secured as an effective space for arranging the component devices of the opening / closing auxiliary means, that outer space may be selected as necessary. [Industrial Applicability]

[0027] The present invention can be used as an emergency door device for tunnels installed in passageways such as railways and roads. [Explanation of symbols]

[0028] 1 Tunnel body 1a Tunnel side wall 2 roadway 3 Evacuation route 4 Evacuation route 4a Entrance 4b Sliding plate 4c Handrail section 5. Landing 6 First Emergency Door 7 Second emergency exit 10 Shell for first door pocket 11 Second door pocket shell 12 First self-closing device 12a fixed pulley 12b Actuation wire 12ba One end side 12bb Other end side 12c Wire winding section 12d Self-closing main body 12e Operating part 12f Regulator 13 Second self-closing device S1 First door pocket space S2 Second door pocket space U1 upper space U2 Anteroposterior outer sum space U3 Lateral space X Landing space Z Evacuation Space

Claims

1. An emergency door device for a tunnel, comprising: an evacuation passageway with an entrance for evacuees to escape to on at least one side of a roadway in a tunnel through which vehicles travel in a longitudinal direction; an emergency door that moves in a longitudinal direction to open and close a landing leading to the entrance, and that is housed in a door pocket space on the tail side of the door leading from the landing when in an open state; and an opening / closing assisting means that assists the opening and closing operation of the emergency door, the opening / closing assisting means being disposed in the door pocket space; The emergency door device for a tunnel is characterized in that the emergency door is a double-pull type in which a pair of front and rear door bodies slide outward in the front-to-rear direction.

2. The landing is designed to be wide enough to accommodate the sliding emergency doors on both sides. Door pocket spaces are provided on both sides of the landing, continuing from both ends in the front and rear directions. The entrance to the evacuation passage is provided on the door pocket space side on at least one side of the landing in the front and rear directions, 2. The emergency door device for a tunnel according to claim 1, wherein the opening / closing assist means are provided separately in door pocket spaces corresponding to the emergency doors.

3. 3. An emergency door device for a tunnel according to claim 1, wherein the front-to-rear width of the landing and the opening width when the front and rear emergency doors are open are set to wide dimensions to allow the entrance and exit of a stretcher carrying an injured person.

4. 2. The emergency door device for a tunnel according to claim 1, wherein the opening / closing assisting means is disposed at a location outside the evacuation space where the bodies of evacuees escaping through the evacuation passage can reach.

5. The opening and closing assistance means includes a self-closing device that automatically closes an open emergency door, 5. The emergency door device for a tunnel according to claim 4, wherein the self-closing device is disposed in an outer space beyond the evacuation space.

6. The automatic closing device is configured with various member devices, including a fixed pulley provided on the entrance side, an operating wire that is hung on the fixed pulley and connected to the emergency door, a wire winding section to which one end of the operating wire is connected and which winds up one end side of the operating wire that is relaxed when the emergency door moves to open and pulled when the emergency door moves to close, and an automatic closing main body section to which the other end of the operating wire is connected and which winds up the other end side of the operating wire in a state where it is charged to close the emergency door when the emergency door moves to close, and which unwinds the other end side of the operating wire when the emergency door moves to open. An emergency door device for a tunnel as described in claim 5, characterized in that these various component devices are arranged in one outer space selected from the outer spaces consisting of an upper space beyond the evacuation space, an outer space in the front-to-rear direction, and a lateral space on the tunnel side wall side, or in an outer space that is a combination of two or more of these.

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