JP3517722B2 - Door body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door body that opens and closes in a substantially horizontal closed posture and a substantially vertical open posture, and is particularly a door provided in a tunnel through which a transportation system such as a roadway or a railroad passes. It belongs to the technical field of the body.

[0002]

2. Description of the Related Art Conventionally, a door is swingably supported by a swing support shaft so as to be opened and closed between a substantially horizontal closed posture and a substantially vertical vertical posture that exceeds a vertical line. There are things,
It has been attempted to build such a door at an opening to an evacuation passage for evacuating from a tunnel road to the outside. In this case, in the tunnel, there are provided a roadway for vehicles to pass through, an evacuation passage located below the roadway, and a step-like high monitoring passageway beside the roadway, and a part of the monitoring passageway is provided. It has already been proposed to make the door openable and closable so that the evacuation route from the roadway to the evacuation route can be opened. A door provided with drive means for forward / reverse driving and power transmission means for interlocking the power of the drive means with the swing support shaft so that the door body is opened / closed by the drive force. When the body is in the open position, the door body
It is necessary to consider the fear that the door will overhang and give a sense of fear by setting the open posture that exceeds the vertical line (a thought point) so that it does not return to the closed posture under its own weight.

[0003]

In this case, however, the power transmission means for connecting the drive means and the swing support shaft in an interlocking manner has a slack, for example, when the power transmission means is a transmission chain, and there is the slack. As a result, the tension state of the transmission chain is reversed between the closed posture side and the open posture side with respect to the vertical line A, which is a consideration point, as shown in FIG. When crossing the vertical line, the tension state of the transmission chain 10 is reversed and the door body 7
Performs an irregular opening / closing operation that shocks and swings by an amount corresponding to the chain slack of the transmission chain 10. For this reason, there is a problem that an excessive load is applied to the driving means and the power transmission means, and a person who sees this is given a feeling of fear, and there is a problem. was there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and it stands up from a substantially horizontal closed posture and crosses a vertical line. A door body swingably supported by a swing support shaft so as to be transformed into a substantially vertical open posture, a drive means for driving the door body in forward and reverse directions, and an output of the drive means. Axis and front
Transmission between the sprocket provided on the swing support shaft
When the chain is suspended, it interferes with the power transmission means for interlocking and connecting the power of the driving means to the swing support shaft from the open posture in the previous stage that crosses the vertical line, and the more the open posture is crossed the vertical line, the more accumulated The door is opened by installing an interfering ammunition that is energized.
Self-weight closing force after the door reaches the vertical line in the process
The vertical line is set so that the stored power of the interfering ammunition is better than the
Opening and closing swing of the door on the open side beyond the
The force obtained by subtracting the door's own weight closing force from the force is the negative of the driving means.
A door body characterized by being configured to work as a load . As a result, the door body can be opened and closed smoothly even though the door body is configured to stand upright above the vertical line, and the drive means and the power transmission means can be protected. In this case, according to the present invention, the interference ammunition may be a compression ammunition.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
~ It demonstrates based on the drawing shown in FIG. In the drawing,
Reference numeral 1 is a tunnel (tunnel), and in the tunnel 1, a roadway 2 through which transportation means such as vehicles and railroads pass,
It has an upper and lower two-layer structure in which evacuation passages 3 are formed on the lower side so as to pass through when a person evacuates out of the tunnel 1 in an emergency such as a fire. A monitoring passage 4 is formed on one side of the road 2 and has a stepped height with respect to the road surface of the road 2. The monitoring passage 4 extends from the road surface to the side surface on the vehicle side. A notched notch portion 4a is formed, and this notch portion 4a serves as an evacuation path (for example, having a stepped shape or a downhill shape) 5 for evacuating from the upper road 2 to the lower evacuation passage 3. The evacuation opening 4a is set so that it can be evacuated to the evacuation passage 3 from the evacuation opening 4a through the evacuation path 5 in the event of an emergency such as a fire. The safety in the tunnel 1 is ensured by being formed in a plurality of places at appropriate intervals in the monitoring passage 4. In addition to the evacuation passage 3, two passages are formed in the area formed below the tunnel 1, and a cable such as an electric wire is laid in these passages.
It can be used for an appropriate passage.

Reference numeral 6 denotes an evacuation door which is provided at the evacuation opening (notch) 4a so as to be openable and closable, and the evacuation door 6 is movable in the traveling direction of the vehicle and opens and closes the evacuation opening 4a. Although the evacuation door 6 is of a type, the escape door 6 is formed in a substantially L-shape by a side plate 6a forming a side surface corresponding portion of the monitoring passage 4 and a ceiling plate 6b forming a road surface corresponding portion of the monitoring passage 4. In addition, although it is closed by an unillustrated self-closing device in an openable state, details of these configurations will be omitted.

A bar 7 is provided above the closed escape door 6 and reinforces the monitoring passage in a portion corresponding to the escape door 6, and the upper surface of the door 7 A swing support shaft 8 is integrally provided on the base end edge side, and the swing support shaft 8 is supported by a bearing bracket 1b provided on the tunnel side wall 1a, whereby the door body 7 becomes the evacuation door ceiling plate 6b. It is set so as to rise from the closed posture in which it is laminated on the upper surface and which is substantially horizontal, and to oscillate into an open posture slightly above the vertical line A, whereby the door body 7 is opened in the open posture. It does not stop in an overhanging state and is designed so as not to give pressure to the evacuees. Further, a sprocket 8a is provided at one end of the swing support shaft 8 protruding from the door body 7, and the sprocket 8a and the output shaft 9a of the drive motor 9 provided obliquely below the tunnel 1 frame side are provided. The transmission chain 10 is suspended in the meantime. The door 7 is set to be automatically opened / closed based on the forward / reverse rotation of the swing support shaft 8 associated with the forward / reverse drive of the drive motor 9.

Further, a support plate 11 having a substantially inverted L-shaped cross section is provided on the tunnel side wall 1a opposed to the swing support shaft 8. The support plate 11 is an interference ammunition composed of a compression ammunition. Twelve proximal ends are fastened. And this interference bullet 1
In the process of opening the door body 7, 2 abuts against the base end portion of the door body 7 from a position on the closed side slightly ahead of the vertical line A and interferes with each other, and is compressed so that the door body 7 moves in the opening direction. The force is increased so that the maximum force is exerted in the open posture that exceeds the vertical line A. Then, in the opening process of the door body 7, the door body 7 has a vertical line A.
Since the self-weight closing force after reaching the value of, the force of the interference ammunition 12 is set to be higher than the self-weight closing force.
The opening / closing swing of the door body 7 on the opening side beyond the constant force always resists the stored force of the interference ammunition 12 (more precisely, the self-weight closing force of the door body 7 from the stored force of the interference ammunition 12). Although it is the subtracted force, since the door body 7 is almost in the upright posture, its own weight lowering force is small) acts as a load of the drive motor 9, so that the transmission chain 10 has a lower chain 10a on its tension side. It has become a setting that never changes.

In the embodiment of the present invention constructed as described above, when an emergency such as a fire occurs in the tunnel 1 and a person in the tunnel evacuates, the closed evacuation door 6 is operated. While you can open the evacuation opening 4a at this point, and then escape from here to the evacuation passage 3 through the evacuation passage 5,
When performing work such as cleaning, the work vehicle travels through the monitoring passage 4, but in such a case, the door body 7 is closed while the work implement is carried out to the monitoring passage 4. When a worker goes in and out, the door 7 is opened so that the worker does not go in and out of the road 2, and traffic is not hindered.

As described above, the door body 7 can be opened and closed as necessary. However, when the door body 7 is opened and closed, the door body 7 has a vertical line A that reduces its own weight closing force.
During the process from the position on the closed side a little closer to the vertical line A to the open position, the open / close state is always biased to the closed side by the stored force of the interfering ammunition 12 that interferes with the door body 7. It will be operated. As a result, in the opening process, the driving force from the driving motor 9 acts in the direction of compressing the interference ammunition 12, and as shown in FIG. The lower chain 10a is in a tensioned state during the entire process until reaching the over-opening posture.
Further, in the closing process, the driving force of the drive motor 9 is compressed while the interference bullet 12 is interfering.
The same transmission chain 10 has the same lower chain 10a as the state in which the interference of the interfering ammunition 12 is eliminated and the dead weight of the door 7 is received.
Is the tension side. Therefore, as in the conventional case, the tension side of the transmission chain 10 is reversed when the vertical line A is crossed, and an irregular opening / closing operation occurs in which the door body swings by an amount corresponding to the chain slack. The open / close operation is performed smoothly without causing any damage, and the power transmission of the drive motor 9, the transmission chain 10, etc. cannot be forgiven to the person watching the open / close operation. The mechanism can be protected.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a tunnel.

FIG. 2 is a perspective view of an evacuation door and a door body built in a monitoring passage.

FIG. 3 is a schematic explanatory diagram illustrating an opening / closing operation of a door body.

FIG. 4 is a side view of an essential part showing a state in which a door is standing upright.

FIG. 5 is a side view of an essential part showing a closed posture of a door body.

FIG. 6 is a side view illustrating a main part.

FIG. 7 is a side view illustrating a main part in a conventional example.

[Explanation of symbols]

1 tunnel 2 way 4 monitoring passages 4a Evacuation area 5 evacuation routes 6 evacuation door 7 door body 8 Swing support shaft 9 Drive motor 10 Transmission Chain 11 Support plate 12 Interference ammunition

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Claims (2)

(57) [Claims] 1. A door body swingably supported by a swing support shaft so as to rise from a substantially horizontal closed posture and transform into a substantially vertical open posture that exceeds a vertical line. A drive means for driving the door body in forward and reverse directions, and a sprocket provided on the output shaft of the drive means and the swing support shaft.
The power transmission means for connecting the power of the driving means to the rocking support shaft by suspending the transmission chain between the racket and the racket interferes with the open posture at the previous stage of crossing the vertical line and crosses the vertical line. With an interfering ammunition that stores energy as it becomes open, the door body reaches the vertical line in the process of opening.
Setting that the power of the interfering ammunition is superior to the force of closing the dead weight
And the opening and closing swing of the door body on the open side beyond the vertical line,
The force obtained by subtracting the door's own weight closing force from the accumulated force of the interference ammunition
Is designed to work as a load on the drive means.
The door body to collect. 2. The door body according to claim 1, wherein the interference bullet is a compression bullet.