JP2003301699A - Ventilator in tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilator in a tunnel, which enables appropriate ventilation through an air duct and enables the appropriate contraction of the air dust. <P>SOLUTION: This ventilator 1 has the expansible air duct 2. The air duct 2 is equipped with a fist air duct 11 and a second air duct 12; and a plurality of ring members 15, 15, etc., are provided as shape retaining members in the air ducts 11 and 12, respectively, so as to maintain the opening state of the air ducts 11 and 12. An air-duct hanger 5, which is equipped with U-shaped bolts 35 and 36 and nuts 37 and 37, is attached to the ring member 15. The ring member 15 is fixed by the bolts 35 and 36 and the nuts 37 and 37, so that the ring member 15 can be prevented from being rotated around an axis orthogonal to the direction of the expansion/contraction of the air duct 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device in a tunnel for removing dust in a place where dust is generated, such as a tunnel, to ventilate the tunnel.

[0002]

2. Description of the Related Art For example, when excavating a mountain tunnel or the like, a large amount of dust is generated along with the excavating work. If such dust remains in the tunnel, it may impair the health of the worker.Therefore, a ventilation device for discharging the dust in the work area near the facet to the outside of the tunnel is known. There is. An example of such a ventilation device is one that discharges air containing dust through a wind pipe. As this ventilation device, it is effective to use an exhaust air blower as close to the face as possible, but it is impossible to permanently install the exhaust blower near the face. For this reason, usually, an exhaust blower is installed at a position about 100 m away from the face, and a wind pipe connecting the exhaust blower and the vicinity of the face is used. The dust-containing air in the vicinity of the face is sucked by the suction force of the exhaust blower through the air duct to remove the dust.

Since a negative pressure is created in the air duct when sucking air, a steel pipe has been conventionally used as such an air duct so as to withstand the negative pressure. For example, when performing blasting work, the steel pipe is doubled so that the wind pipe can be easily retracted, one is used for storage, and the other is used for expansion and contraction. The steel pipe of No. 2 was extended to the vicinity of the face and the blast tube for expansion and contraction was stored in the steel pipe for storage during blasting work.

However, the wind pipe using such a steel pipe has a problem that the weight of the wind pipe itself becomes heavy. Further, since the steel pipes are used in duplicate, there is a problem that such a wind pipe cannot be used when the tunnel has a curve.

To cope with such a problem, a ventilator using a vinyl wind tube with a ring has been conventionally considered as a flexible wind tube. The ring-equipped vinyl air duct in this ventilation device has a vinyl air duct main body, and a plurality of ring members are attached to the air duct main body so as to be spaced apart from each other in the longitudinal direction of the air duct main body. The ring member has hardness and maintains its open state even if the inside of the air tube body has a negative pressure. By using this vinyl wind tube, it is possible to withstand negative pressure, it is lightweight, and it is also compatible with curves.

[0006]

However, in the above-described conventional ventilation device using the vinyl wind tube with ring, when the air volume is small, it can be used, but the air volume becomes large and the wind speed in the tube becomes high. If this happens, the pressure inside the tube rises and the air tube deforms or closes, making it impossible for practical use. In particular, if the air duct has an extended portion and a contracted portion, the wind velocity and pressure distribution in the air duct fluctuate, so that deformation and blockage of the air duct are induced. Therefore, even if it is used, it has been limited to use only with the wind tube fully extended or with the air flow reduced.

As a cause of this, there is a case where each ring member rotates around the hanging position due to a negative pressure in the air tube when the air is taken in through the air tube by the blower. In this case, there is a problem in that the air duct is closed or the opening cross-sectional area of the air duct is very small, and proper suction cannot be performed.

Further, by rotating each ring member around the suspended position, when the air tube is contracted, the ring members do not align neatly in a certain direction and the air tube can be reliably contracted. There was a problem that I could not.

Therefore, an object of the present invention is to provide a ventilation device in a tunnel which can appropriately perform ventilation through a wind pipe and can appropriately contract the wind pipe.

[0010]

A ventilation device for a tunnel according to the present invention, which has solved the above-mentioned problems, has an expandable telescopic wind tube having flexibility, and is installed in the tunnel via the expandable air duct. In a ventilation device in a tunnel for performing ventilation in a tunnel by sucking air, a plurality of shape-retaining members that maintain the opening shape of the telescopic air tube are separated from each other in the telescopic direction of the telescopic air tube. And a rotation stopping member for preventing the shape retaining member from rotating with respect to the expandable air duct.

As described above, in the ventilation device according to the present invention, the shape retaining member for retaining the shape of the opening of the expandable air duct is provided, and the rotation stopping member for preventing the shape retaining member from rotating. It is provided. When contracting the telescopic wind tube,
The reason why the shape retention members do not align properly in a certain direction is that the shape retention members rotate and the rows are disturbed.
In this respect, the ventilation device according to the present invention is provided with the rotation stopping member for preventing the shape retaining member from rotating. Since the shape-preserving member is prevented from rotating by this rotation stopping member, when the expandable air tube is contracted, all of the plurality of shape-retaining members are arranged in a certain direction. Therefore, the expandable air tube can be reliably contracted in a state where the shape retaining members are neatly aligned. Further, since the shape retaining member is prevented from rotating, it is possible to prevent a situation in which the shape retaining member is rotated and air cannot be properly sucked when air is sucked through the expandable air duct.

Further, it is preferable that the rotation stopping member includes a holding member for holding a plurality of points on the shape retaining member.

By providing a holding member that holds the shape-retaining member at a plurality of points, for example, two points, it is possible to reliably prevent the shape-retaining member from rotating with a simple structure.

Further, an expansion / contraction device for expanding / contracting the wind pipe is provided. The expansion / contraction device is provided with a rail member provided in the tunnel along the tunnel excavation direction and a shape retaining member suspended from the rail member. It is preferable to adopt a mode including an attached suspension member and a drive device that fixes the rail member to the tunnel to move the suspension member along the rail member relative to the tunnel. Is.

A telescopic wind tube according to the present invention includes a rail member and
A plurality of suspending members to which a plurality of shape-retaining members are respectively attached, and an expanding / contracting device provided with a driving device are used, and the suspending member is provided with a rotation stopping member. As described above, by providing the rotation stopping member on the suspension member, the device configuration can be further simplified.

Further, the driving device may be fixed to the tunnel, and the rail member may be moved relative to the tunnel by operating the driving device.

When the drive device is operated, the suspension member moves relative to the rail member. Here, when the rail member is fixed to the tunnel and the drive device is actuated, the shape retaining member moves via the suspending member, and the telescopic air duct expands or contracts. On the other hand, when the drive device is fixed to the tunnel or fixed via a member provided in the tunnel, for example, a rail suspension trolley, the drive device is operated, and the rail member moves with respect to the tunnel. Since the rail member can be moved in this way, the rail can be easily moved even when the rail member is moved as the tunnel excavation progresses.

Here, the rail member may be suspended by a rail suspension truck provided in the tunnel. As described above, since the rail member is suspended by the rail suspension truck, the rail member can be smoothly moved when the rail member is moved.

Further, the rail member is provided with a first rail member and a second rail member, a plurality of suspension members are suspended from the first rail member, and the second rail member is used as a rail suspension truck. It is preferable that it is suspended.

As described above, when the suspension member for suspending the wind pipe and the rail suspension dolly are provided, the rail member is provided with the first rail member and the second rail member for moving them. As a result, a smoother movement of the wind pipe or the rail member can be realized.

Further, a trolley for hanging a wind pipe is provided in a part of the plurality of hanging members, a plurality of dollies for hanging a wind pipe are provided, and a plurality of dollies for hanging a wind pipe are connected by a connecting member. It is also possible to adopt a mode. In this way, by providing the wind pipe suspension dolly in a part of the suspension member, the wind pipe can be smoothly contracted, and a plurality of wind pipe suspension trucks are connected by a connecting member, for example, a wire. By doing so, the tension can be dispersed and the tension can be prevented from concentrating on the wind pipe near the moving device.

Further, the expandable air duct comprises a plurality of split expandable air ducts, a connecting pipe is provided between the split expandable air ducts, and the drive devices are respectively provided in correspondence with the plurality of split expandable air ducts. It is also possible to adopt a mode provided.

As described above, by providing a plurality of split expandable air ducts, it is possible to efficiently move the air ducts when the tunnel is being excavated, so that the work efficiency of the tunnel construction to be performed while performing ventilation. Can be improved.

Further, a blower for sucking the air in the tunnel is connected to the base end portion of the expandable air duct, and the blower is provided with a tubular member for accommodating the shape retaining member in the contracted expandable air duct. It can be assumed to be present.

As described above, since the blower is provided with the tubular member for accommodating the contracted telescopic air duct, the shape-retaining members can be aligned and the flexible telescopic air duct is used. It is possible to reduce the pressure loss when sucking air and reliably apply suction force to the telescopic air duct.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a schematic side view showing the outline of a ventilation device in a tunnel according to the first embodiment of the present invention, and FIG. 2 is an enlarged side view of the main part thereof.

As shown in FIG. 1, a ventilation device (hereinafter referred to as “ventilation device”) 1 in a tunnel according to the present embodiment is provided with a telescopic wind pipe 2. The blower 3 is connected to the base end of the expandable air tube 2. This expandable air tube 2 is a first expandable air tube 11 that is a split expandable air tube of the present invention provided on the base end side.
And a second air duct 12 which is a split telescopic air duct of the present invention provided on the tip side. First air duct 11 and second
The air ducts 12 are made of vinyl, for example, and are flexible air ducts that can expand and contract. These first wind tubes 1
Telescopic wind tube 2 due to expansion and contraction of first and second air tubes 12
Is stretchable as a whole. When the expandable air duct 2 is completely extended, it extends, for example, to the face working area near the face K. Then, in the face work area, dust generated when performing work such as blasting, slipping, and concrete spraying is sucked together with air.

Between the first air duct 11 and the second air duct 12, a connecting air duct 13 made of, for example, steel or resin is provided as a connecting pipe.
Is intervening. In addition, at the tip of the second wind pipe 12,
A bell mouth 14 is attached to introduce air containing dust from a region where dust is generated in the tunnel T. Further, a plurality of ring members 15, 15 ... Made of metal or resin, which are the shape-retaining members of the present invention shown in FIG. 2, are attached to the first air pipe 11 and the second air pipe 12, respectively. These plural ring members 15, 15 ...
Are attached at regular intervals in the expansion / contraction direction of the expandable air tube 2. These ring members 15 have hardness and are attached to the surfaces of the first air duct 11 and the second air duct 12 so that the air ducts 11 and 12 are not crushed and their passages are not blocked. , Keep their shape and keep their shape. Further, the surface thereof is covered with a tape 16. By covering the surface of the ring member 15 with the tape 16, deterioration of the ring member 15 and the expandable air tube 2 is prevented.

As shown in FIGS. 3 and 4, at a position above the telescopic air duct 2, a telescopic device 4 for extending and retracting the telescopic air duct 2 and a book for suspending the ring member 15 in the telescopic air duct 2 are suspended. An air tube suspension fitting 5, which is the suspension member of the invention, is provided. In FIG. 4, the tape 16 covering the ring member 15 is not shown. In the present embodiment, the wind pipe hanging fitting 5 also functions as the rotation stopping member of the present invention. The telescopic device 4 includes a rail member 21 provided along the excavation direction of the tunnel T. The rail member 21 includes a first traveling rail 22 which is a first rail member provided at a lower step portion thereof and a second traveling rail 23 which is a second rail member provided at an upper step portion thereof. On the first traveling rail 22 of these, the first air duct 11 and the second air duct 11
The same number as the plurality of ring members 15, 15 provided on the wind pipe 12 are suspended.

As shown in FIG. 3, the wind pipe hanging fitting 5 includes a pair of roller members 31 and 31 arranged to face each other. The roller members 31 and 31 are pivotally supported by brackets 32 and 33, which are pivotal members of the present invention, via rotary shafts (not shown), and travel while rolling on the first traveling rail 22 of the rail member 21. To do. Bracket 3
2 and 33 are vertical pieces 32 extending in the vertical direction.
A, 33A and horizontal pieces 32B, 33B extending horizontally from the lower end pieces of the vertical pieces 32A, 33A. Roller members 31, 31 are pivotally supported on these vertical pieces 32A, 33A. Further, the vertical pieces 32A and 33A arranged to face each other are connected by a long bolt 34.

Further, U-shaped bolts 35 and 36 are provided on the horizontal pieces 32B and 33B. U-shaped bolt 35,
All 36 have the same structure, and a screw thread is formed on both upper end portions of one U-shaped bolt 35. Further, the ring member 15 is passed through the lower end portion of the U-shaped bolt 35, and nuts 37, 37 are tightened on both upper end portions of the U-shaped bolt 35 as shown in FIG. Is a horizontal piece 32B of the bracket 32
Fixed to. Further, as shown in FIG. 4, the brackets 32 and 33 are arranged with a certain distance therebetween, and the ring member 15 is fixed by the brackets 32 and 33. Since the roller member 31 is attached to the brackets 32 and 33, the brackets 32 and 33 are prevented from rotating with respect to the rail member 21. Since the brackets 32 and 33 are prevented from rotating, the ring member 15 is also prevented from rotating at the same time. Furthermore, the bracket 3
A spacer 38 made of a square pipe is interposed between the second and the third members 33 to keep the distance between them constant and prevent the brackets 32 and 33 from being twisted and deformed.

As shown in FIG. 4, among the plurality of air duct suspension fittings 5, 5 ... Arranged apart from each other in the telescopic direction of the telescopic air duct 2, for example, one out of ten air ducts is used. A dolly 6 for hanging a pipe is provided. Therefore, although not shown, the ventilation device 1 is provided with a plurality of, for example, 11 air duct suspension dollies 6 as a whole. As shown in FIGS. 3 and 5A, the windpipe suspension dolly 6 includes roller members 41, 41 that roll along the first traveling rail 22 of the rail member 21. This roller member 41, 41
Are pivotally supported by the housing member 42 via a rotary shaft (not shown). The housing member 42 has a U-shaped cross-section with an upper opening, and the roller member 41 is pivotally supported on both vertical pieces thereof. Further, a plurality of wind-pipe suspension dollies 6 arranged apart from each other in the expansion-contraction direction of the expandable air duct 2 are connected by wires (not shown).

Further, the rail member 21 is suspended from the H-section steel H attached to the upper part of the tunnel T via the rail suspension truck 7. Rail suspension truck 7
As shown in FIGS. 3 and 5B, includes a housing member 51 having a U-shaped cross section with an opening at the bottom. The upper portion of the housing member 51 is connected to the joint member 52, and the housing member 51 is connected to the H-section steel H via the joint member 52. Alternatively, instead of this, a tunnel T may be formed at a hole-in anchor or the like (not shown).
It can also be supported by the ground around. Further, the housing member 51 includes roller members 53, 53 on the rotating shaft 5.
It is pivoted via 4, 54 respectively. The second traveling rail 23 of the rail member 21 is suspended by the roller members 53, 53. Then, the roller members 53, 5
3 rolls under the second traveling rail 23, so that the rail member 21 moves relatively to the tunnel T.

Further, the connecting air tube 13 and the bell mouth 14
In the first drive device 61 and the second drive device 6, respectively.
2 are provided (see FIG. 1). These drive devices 6
The reference numerals 1 and 62 have the same configuration, and are configured to move the connection air duct 13 and the bell mouth 14 relative to the rail member 21, respectively. For this reason, for example, the drive device 6 in a state in which the rail member 21 is fixed to the tunnel T or the rail suspension truck 7 suspended in the tunnel T.
By operating 1, 62, the connecting air duct 13 of the telescopic air duct 2 and the bell mouth 14 move with respect to the tunnel T. Further, the drive devices 61 and 62 each include a wireless device (not shown), and can be operated from a distant position, so-called remote operation.

Now, for example, when the first drive device 61 is operated so that the connecting air duct 13 moves toward the base end side of the telescopic air duct 2 with the first air duct 11 extended, the first air duct 11
Contracts. In addition, when the second driving device 62 is operated so that the bell mouth 14 moves to the base end side of the telescopic air tube 2 in the state where the second air tube 12 is expanded, the second air tube is contracted.
On the contrary, when the first wind pipe 11 is contracted, the connection wind pipe 13 moves toward the tip side of the telescopic wind pipe 2 so that the first drive device 61 is moved.
Is operated, the first air duct 11 extends. Also, the second
If the second driving device 62 is operated so that the bell mouth 14 moves to the tip side of the telescopic wind tube 2 in a state where the air tube 12 is contracted, the second air tube 12 is extended. Further, the first drive device 61 is connected to the plurality of wind pipe suspension dollies 6 provided in the first wind pipe 11 via a connecting member such as a wire (not shown), and the second drive device 62 is It is connected to a plurality of trolleys 6 for hanging a wind pipe provided on the two wind pipes 12. For this reason, when the first air duct 11 and the second air duct 12 are extended, an unreasonable force is not applied to the first air duct 11 and the second air duct 12 themselves.

Further, without connecting the rail member 21 to the tunnel T or the rail suspension truck 7, the connecting air duct 13
The first driving device 61 and the second driving device 6 with the bell mouth 14 fixed to the tunnel T or the rail trolley 7
By activating 2, the rail member 21 can be moved relative to the tunnel T.

Further, the blower 3 is mounted on the blower carriage 10 shown in FIG. The blower carriage 10 is of a self-propelled type. The blower 3 includes a tubular member 71, as shown in FIG. The tubular member 71 is arranged along the expansion / contraction direction of the expandable air tube 2, and has a cylindrical shape having a diameter smaller than the diameter of the ring member 15 provided in the expandable air tube 2. The base end portion of the expandable air tube 2 is attached to the tubular member 71, and when the first air tube 11 contracts, the ring member 1 provided on the first air tube 11
5, 15 ... Are accommodated in the tubular member 71. An exhaust air duct 8 for exhausting the sucked air to the outside of the mine is connected to the rear end of the blower 3.

In the ventilator according to the present embodiment having such a configuration, when excavating a tunnel, work such as blasting, sliding out, concrete spraying, etc., which is performed in the face working area near the face K, is performed. Dust generated by suction is removed. When performing dust removal work, the second
It is preferable to extend the air tube 12 and extend the first air tube 11 in accordance with the advance of the face K in the tunnel T (see FIG. 7A). In performing such suction work, the blower 3 according to the present embodiment is provided with the tubular member 71 that is inserted and arranged at the base end of the expandable air tube 2. This tubular member 71 allows the telescopic wind tube 2
Since the suction force can be surely applied to the inside, the dust in the vicinity of the face K can be surely removed.

Here, the wind tubes 11 and 12 of the expandable air tube 2 in the present embodiment are respectively provided with a plurality of ring members 15,
15 are provided. If the ring members 15, 15 ... Rotate around the axis orthogonal to the telescopic air duct 2 when the air ducts 11, 12 are contracted, the opening cross-sectional area of the telescopic air duct 2 becomes very small. Alternatively, it is possible that the expandable air duct 2 is blocked. In this regard, in the ventilation device 1 according to the present embodiment, the ring member 15 is provided with respect to the wind pipe suspension fitting 5 so that the U-shaped bolts 35 and 36 and the nuts 37 and 3 are provided.
By being fixed at 7, the rotation of the expandable air tube 2 about the axis orthogonal to the expandable direction is prevented. In this way, since the wind pipe suspension fitting 5 prevents the ring member 15 from rotating, the ring member 15 is prevented from rotating when the wind pipes 11 and 12 are contracted, and as a result, the ring member 15 and 15 ... remains facing in a fixed direction.
Therefore, it is possible to prevent the air ducts 11 and 12 from being blocked during suction, and it is possible to perform proper suction.

When excavating a tunnel,
When there is a wind pipe in the vicinity, such as blasting work near the face K, there is a case where work that may damage the wind pipe is performed. When performing such work, the first drive device 61 is driven to contract the first air duct 11 as shown in FIG. In this way, by contracting the first air duct 11, the bell mouth 14 provided at the tip of the expandable air duct 2 can be retracted. Thus
By retracting the portion of the expandable air tube 2 such as the bell mouth 14 or the like, damage to the bell mouth 14 or other portions of the expandable air tube 2 can be prevented.

Here, the wind tubes 11 and 12 of the expandable air tube 2 in the present embodiment are provided with a plurality of ring members 15, respectively.
15 are provided. If the ring members 15, 15 ... Are rotated around the axis orthogonal to the expandable air duct 2 when the air ducts 11, 12 are contracted, the ring members 15, 15 ...
It is conceivable that the ... Is not aligned in a certain direction and the wind tubes 11 and 12 cannot be appropriately contracted. In this respect, in the ventilation device 1 according to the present embodiment, the ring member 15 is provided with the U-shaped bolts 35 and 36 and the nut 3 with respect to the wind pipe suspension fitting 5.
By being fixed at 7, 37, the expansion / contraction air tube 2 is prevented from rotating about an axis orthogonal to the expansion / contraction direction. In this way, since the wind pipe suspension fitting 5 prevents the ring member 15 from rotating, the ring member 15 is prevented from rotating when the wind pipes 11 and 12 are contracted, and as a result, the ring member 15 and 15 ... remains facing in a fixed direction. Therefore, the wind pipes can be reliably contracted with the wind pipes 11 and 12 aligned neatly.

Further, the air tube suspension fitting 5 for preventing the rotation of the ring member 15 also functions as a suspension member for the ring member 15. The wind pipe suspension fitting 5 includes a rail member 21.
Roller member 3 rolling along the first traveling rail 22 of
1, 31 are provided. Therefore, the wind pipe suspension fitting 5
Can smoothly move along the first traveling rail 22 of the rail member 21.

Further, the driving devices 61 and 62 are fixedly attached to the connecting air tube 13 and the bell mouth 14, respectively, and are respectively mounted on the rail member 21 and the connecting air tube 13.
Alternatively, the bell mouth 14 is moved relatively. Therefore, when the connecting air duct 13 or the bell mouth 14 is moved to extend or contract the telescopic air duct 2, the rail member 21 is fixed to the tunnel T. By operating the first drive device 61 with the rail member 21 fixed to the tunnel T, the connecting air duct 13 moves with respect to the tunnel T, and the first air duct 11 is extended or contracted. Further, by operating the second drive device 62 with the rail member 21 fixed to the tunnel T, the bell mouth 14 moves with respect to the tunnel T, and the second air tube 12 is extended or contracted. Here, a plurality of wind-pipe suspension trucks 6, 6, ... Are connected to the drive devices 61, 62 by connecting members such as wires (not shown). Therefore, the tension generated by driving the drive devices 61 and 62 is dispersed and equalized in each wind pipe suspension dolly 5, and the tensile force is concentrated and acts on the wind pipes near the drive devices 61 and 62. To prevent it. Therefore, the wind pipes 11 and 12
Can be extended or contracted evenly in the direction of expansion and contraction thereof.

Further, as the excavation of the tunnel T progresses, the cutting face K gradually moves forward, and even when the telescopic wind tube 2 is completely extended, the cutting face K is located away from the bell mouth 14. At this time, the ventilation device 1 is advanced in the direction of the face K. The procedure for moving the ventilation device 1 forward will be described, for example, for the case where the face K1 shown by the solid line in FIG. 7B moves to the face K2 shown by the phantom line as excavation proceeds. Here, before advancing the ventilation device 1,
It is necessary to move the rail member 21 forward. Rail member 2
When moving 1 forward, first, a new rail suspension dolly 7 is installed at a position where the rail member 21 is advanced. Next, for example, the second drive device 62 provided in the bell mouth 14 is fixed to the tunnel T or the rail suspension dolly 7 provided in the tunnel T. By operating the second drive device 62 in this state, the rail member 21 shown by the solid line advances, is inserted into the newly provided rail hanging dolly 7, and moves to the position shown by the phantom line. Here, the roller member 5 which is in contact with the second traveling rail 23 of the rail member 21 and rolls on both the existing rail suspension trolley 7 and the new rail suspension trolley 7.
3, 53 are provided. Therefore, the rail member 21
Can be smoothly advanced.

When the rail member 21 is moved forward, the ventilation device 1 is moved forward. Therefore, the second drive device 62 is released from the tunnel T or the rail suspension dolly 7, while the rail member 21 is fixed to the tunnel T. Next, the 1st drive device 61 is driven, the 1st wind pipe 11 is shrunk, and the blower truck 10 carrying the blower 3 is advanced. By doing this, the distance between the base end of the expandable air tube 2 attached to the blower 3 and the face K2 is such that the excavation of the tunnel T does not proceed and the base end of the expandable air tube 2 before the blower carriage 10 is moved. And the face K1 are almost the same. Therefore, by extending the first wind pipe 11 and the second wind pipe 12 as they are, the bell mouth 1 in the telescopic wind pipe 2 is expanded.
4 will reach the vicinity of the face K2. By doing so, the ventilation device 1 can be easily moved forward, so that the work efficiency can be improved accordingly.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above-described embodiment, as the expandable air tube 2,
Although the one having the first air duct 11 and the second air duct 12 is used, for example, one having only one air duct, or one having three or more air ducts connected thereto may be used.

Further, in the above embodiment, the ring member 15
The two U-shaped bolts of the wind pipe hanging fitting 5 are used as the rotation stopping member of the ring member 15 to fix the rotation of the ring member 15 at two points. It can be fixed as a rotation stop. Alternatively, the rotation of the ring member 15 can be stopped by fixing the length position in the circumferential direction to some extent.

[0049]

As described above, according to the present invention, it is possible to provide a ventilation device in a tunnel in which the air duct can be appropriately contracted and the air can be appropriately ventilated through the air duct.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an outline of a ventilation device according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a main part of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 3 is an enlarged front view of a main part of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 4 is an enlarged side sectional view of a main part of the ventilation device according to the exemplary embodiment of the present invention.

5A is a sectional view taken along the line AA of FIG. 3, and FIG. 5B is a sectional view taken along the line BB of FIG.

FIG. 6 is a side view of a tubular member of the blower.

FIG. 7A is a side view for explaining the operation of contracting the expandable air duct, and FIG. 7B is a side view for explaining the operation of advancing the ventilation device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ventilation device, 2 ... Telescopic air duct, 3 ... Blower, 4 ... Telescopic device, 5 ... Air duct suspension metal fitting, 6 ... Air duct suspension truck, 7 ...
Rail suspension truck, 8 ... Ejection air duct, 10 ... Blower carriage, 11 ... First air duct, 12 ... Second air duct, 13 ... Connection air duct, 14 ... Bell mouth, 15 ... Ring member, 16 ... Tape, 21 ... Rail member, 22 ... First traveling rail, 23 ...
2nd traveling rail, 31 ... Roller member, 32, 33 ... Bracket, 32A, 33A ... Vertical piece, 32B, 33B ... Horizontal piece, 34 ... Spacer, 35, 36 ... U-shaped bolt, 37
... Nuts, 38 ... Spacers, 41 ... Roller members, 42 ...
Housing member, 51 ... Housing member, 52 ... Joint member, 53 ... Roller member, 54 ... Rotating shaft, 61 ... First drive device, 62 ... Second drive device, 71 ... Cylindrical member, H
… H-section steel, K, K1, K2… Face, T… Tunnel.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuru Yokoyama             Kashima-ken, 1-2-7 Moto-Akasaka, Minato-ku, Tokyo             Inside the corporation (72) Inventor Shigeru Kikuchi             Kashima-ken, 1-2-7 Moto-Akasaka, Minato-ku, Tokyo             Inside the corporation (72) Inventor Hiroharu Moriwaki             2-8-1 Shintomi Stock Market, Chuo-ku, Tokyo             Shayazawa Factory

Claims (9)

[Claims] 1. A ventilation device in a tunnel, which has a flexible expandable telescopic air duct and sucks air in the tunnel through the expandable air duct to ventilate the tunnel. , A plurality of shape-retaining members that retain the opening shape of the expandable air duct,
Ventilation in a tunnel, characterized in that a rotation stop member is provided which is attached to the telescopic air duct so as to be separated in the telescopic direction of the telescopic air duct and prevents the shape retaining member from rotating with respect to the telescopic air duct. apparatus. 2. The ventilation device in the tunnel according to claim 1, wherein the rotation stopping member includes a holding member that holds a plurality of points on the shape retaining member. 3. An expansion / contraction device for expanding / contracting the wind pipe is provided, and the expansion / contraction device is suspended from the rail member provided inside the tunnel along the excavation direction of the tunnel. , A plurality of suspension members to which the plurality of shape-retaining members are respectively attached, and by fixing the rail member to the tunnel,
The ventilation device in the tunnel according to claim 1 or 2, further comprising: a drive device that moves the suspension member along the rail member relative to the tunnel. 4. The ventilation device in the tunnel according to claim 3, wherein the rail member is moved relative to the tunnel by fixing the drive device to the tunnel and operating the drive device. . 5. The ventilation device in the tunnel according to claim 4, wherein the rail member is suspended by a rail suspension truck provided in the tunnel. 6. The rail member includes a first rail member and a second rail member, the plurality of suspension members are suspended from the first rail member, and the second rail member is the suspension member. The ventilation device in the tunnel according to claim 5, which is hung on a rail trolley. 7. A wind-pipe hanging dolly is provided in a part of the plurality of hanging members, a plurality of wind-tube hanging dollies is provided, and the plurality of wind-tube hanging dolly is a connecting member. Ventilation device in the tunnel according to any one of claims 3 to 6, which is connected by means of. 8. The expandable air duct comprises a plurality of split expandable air ducts, a connecting pipe is provided between the split expandable air ducts, and each of the split expandable air ducts corresponds to the plurality of split expandable air ducts. The ventilation device in the tunnel according to any one of claims 3 to 7, wherein the drive device is provided. 9. A blower for sucking air in the tunnel is connected to a base end portion of the expandable air tube, and the blower has a tubular shape in which the shape-retaining member in the contracted expandable air tube is accommodated. The ventilation device in the tunnel according to any one of claims 1 to 8, wherein a member is provided.