JP6062170B2 - Jet fan mounting structure and mounting method - Google Patents

Description

  The present invention relates to a mounting structure and a mounting method of a jet fan that is suspended from an upper part in order to perform ventilation and smoke exhaustion in a fire in a road tunnel.

  Conventionally, a jet fan is suspended from the upper part of a road tunnel to ventilate and emit smoke in a fire. 11 is a front view of a tunnel with a jet fan according to a conventional example (viewed from the direction of the tunnel entrance), FIG. 12 is a front view showing a jet fan mounting structure according to the conventional example, and FIG. 13 is related to the conventional example. It is a side view which shows the attachment structure of a jet fan.

  As shown in FIG. 11, jet fans 1 and 1 are suspended and installed on a tunnel ceiling wall 7 in the tunnel 6 from above. The jet fan 1 includes a fan main body inside a cylindrical casing, and blows air in the tunnel axial direction (vehicle traveling direction) to ventilate the tunnel and exhaust smoke during a fire. Yes.

  Next, with reference to FIG.12 and FIG.13, the attachment structure of the jet fan 1 which concerns on a prior art example is demonstrated. At four locations on the side surface of the cylindrical casing of the jet fan 1, inverted U-shaped side support members 2 are provided. Two side support members 2 are provided on both sides of the side surface of the jet fan 1 with a predetermined interval. On the other hand, side suspension members 101, 102, 103, 104 for hanging the jut fan 1 are fixed to the tunnel ceiling wall 7. The side suspension members 101, 102, 103, 104 are located obliquely upward corresponding to each of the four side support members 2 provided in the jet fan 1. The side suspension members 101, 102, 103, 104 and the four side support members 2 are connected by four connection members 100, respectively. As described above, the jet fan 1 is suspended from the tunnel ceiling wall 7 and supported by four points.

  In FIG. 13, the side suspension members 102 and 104 are originally not visible because they are on the rear side of the jet fan 1. However, in this drawing, the side suspension members 102 and 104 are indicated by solid lines for convenience of explanation. Yes. The same applies to the following drawings.

  Further, top support members 5, 5 are provided at the left and right upper ends of the jet fan 1 in FIG. 13, and are connected to the top suspension members 3, 3 fixed to the tunnel ceiling wall 7 by the connection members 4, 4. ing. These are provided for stabilizing the directionality of the jet fan 1 during operation, and are not intended to support the load of the jet fan 1.

  On the other hand, regarding a jet fan mounting structure in a tunnel, Patent Document 1 describes an invention related to a fan mounting bracket and a mounting method for shortening the fan mounting work time. Patent Document 2 and Patent Document 3 describe an invention related to a support structure for a jet fan for suppressing peristalsis during operation of the jet fan.

JP-A-10-110700 JP 2002-364300 A JP 2010-106602 A

  By the way, although the jet fan is manufactured by a plurality of fan manufacturers, the shape and weight of the fan main body (electric motor, impeller) differ depending on each manufacturer. Therefore, as a result of considering the weight balance, even if the cylindrical casing is the same size, the position of the side support member for mounting the jet fan differs for each manufacturer.

  FIG. 14 is a side view showing a jet fan mounting structure according to a conventional example, and is a view showing a state in which jet fans having different side support member positions are mounted. FIG. 14 shows six points marked with a, b, and c. Each point of a, b, and c is a position where the lower end part of the connection member 100 is connected according to the position of the side support member 2, and is hereinafter referred to as “hanging point position”. The relationship of the distance A between the suspension point positions a and a, the distance B between the suspension point positions b and b, and the distance C between the suspension point positions c and c is A <B <C. As shown by the dotted lines in FIG. 14, when the suspending point position is different, the position of the connecting member 100 that connects the side suspension members 101, 102, 103, 104 and the side support member 2 is shifted. In addition, the side part suspension member 101,102,103,104 of FIG. 14 is designed according to the suspension point position c and c.

  FIG. 15 is an enlarged view showing a connecting portion between the side suspension member 101 that is one of the four side suspension members and the connecting member 100. 15A shows the case of the hanging point position a, FIG. 15B shows the case of the hanging point position b, and FIG. 15C shows the case of the hanging point position c. Here, since the side suspension member 101 is designed according to the suspension point positions c and c, in FIG. 15C, the direction of the plate of the side suspension member 101 for attaching the connecting member 100 is determined. The direction of the connecting member 100 is the same. However, in FIGS. 15A and 15B, the direction of the connecting member 100 changes according to the change in the hanging point position, and the side hanging member 101 is inclined with respect to the plate direction. In addition, strength problems such as metal fatigue occur in the connection portion.

Further, in designing the side suspension member, as shown in FIGS. 16 and 17, the weight balance in the individual installation state is calculated from the balance calculation determined by the suspension angles θ _{1 to} θ ₄ depending on the side suspension member and the suspension point position. The strength calculation is performed to determine the shape and the like of the side suspension member. Here, F ₁ in FIGS. 16 and 17 represents the force applied to each of the side suspension members 101 and 103 in FIG. 14, θ ₁ represents the suspension angle in the tunnel cross-sectional direction, and θ ₃ represents the tunnel. The hanging angle in the longitudinal section direction is shown. Similarly, F ₂ represents the force applied to each of the side suspension members 102 and 104 in FIG. 14, θ ₂ represents the suspension angle in the tunnel transverse section direction, and θ ₄ represents the suspension angle in the tunnel longitudinal section direction. Show. If the jet fans with different suspension point positions are installed on the existing side suspension members ignoring the balance calculation determined by these suspension angles, overload and metal fatigue due to load unevenness are likely to occur, and this causes a safety problem. Arise.

  In addition, since the jet fan is disassembled and maintained at the factory every 5 to 10 years, it is usually removed from the site and re-installed after the factory maintenance is completed. In that case, in order to avoid the shortage of jet fans in the tunnel as much as possible, the maintenance period is inevitably shortened, which causes a problem of quality deterioration in maintenance. On the other hand, it is conceivable to install a jet fan with a different hanging point position instead of the same jet fan. However, because of the above safety problems, a new side hanging member suitable for the hanging point position can be used. Design, production and anchor placement are required, increasing costs.

  In addition, with the recent revision of automobile exhaust gas regulations, demand for jet fans for ventilation has been declining, and effective use of jet fans owned by road management companies has also become a problem.

  On the other hand, the prior art document does not describe the mounting structure and mounting method for mounting jet fans at different hanging point positions. In the past, it was assumed that only one type of jet fan would be installed at one installation location, and considering the installation structure of a jet fan in consideration of installing different types of jet fans in the future, Not done.

  Further, the conventional side suspension member has been operated so as to be replaced if there is a problem such as deformation or damage due to inspection when the jet fan is removed. Therefore, in designing the side suspension member, in most cases, a design method based on the tensile strength is adopted so that the deformation is allowed but not broken. Such a method can ensure a sufficient inspection time of the side suspension member when the jet fan is removed as in the prior art, and there is no problem as long as the side suspension member is replaced as necessary. However, if the process of removing the existing jet fan and the process of installing the new jet fan are to be performed continuously, the inspection time of the side suspension member cannot be sufficiently secured, which may cause a problem. This problem occurs even when the side support member is replaced with the same jet fan.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and a jet fan mounting structure capable of mounting a plurality of types of jet fans having different side support member positions without changing the side suspension members. And a mounting method to solve the safety and cost problems, and to quickly replace and effectively use the jet fan.

  In order to solve the above-described problems, a jet fan mounting structure according to the present invention includes a side suspension member provided on a tunnel ceiling wall, a side support member provided on a side surface of the jet fan, and the side suspension member. A jet fan mounting structure including a connecting member that connects the side support member, and when a plurality of types of jet fans having different side support member positions are mounted, The strength of the side suspension member is calculated so as to satisfy a predetermined strength with respect to the load.

  Preferably, the connecting member is rotatable in the tunnel axis direction around the upper end portion of the connecting member.

  Preferably, the upper end portion of the connecting member is horizontally movable in the tunnel axis direction.

  The jet fan mounting method of the present invention includes a step of removing an existing jet fan, and a step of mounting a new jet fan having a side support member whose position is different from that of the existing jet fan. .

  The jet fan mounting method of the present invention is characterized in that the step of removing the existing jet fan and the step of mounting the new jet fan are continuously performed without replacing the side suspension member.

  The jet fan mounting structure according to the present invention connects a side suspension member provided on a tunnel ceiling wall, a side support member provided on a side surface of the jet fan, and a side suspension member and a side support member. And a connecting member. When a plurality of types of jet fans with different side support member positions are attached, the strength of the side suspension member is calculated so as to satisfy a predetermined strength with respect to the load of each jet fan. ing. Therefore, according to this invention, the jet fan from which the position of a side part support member differs can be attached, without changing the side part suspension member provided in the tunnel ceiling wall.

  Further, according to the present invention, since the connecting member can be rotated in the tunnel axis direction around the upper end portion of the connecting member, when a plurality of types of jet fans with different positions of the side support members are attached, By rotating the connecting member according to the position of the side support member, it is possible to suppress an excessive force from being applied between the side suspension member and the connecting member. This is advantageous in calculating the strength of the side suspension member.

  Further, according to the present invention, since the upper end portion of the connecting member can be horizontally moved in the tunnel axis direction, the position of the side support member can be adjusted when a plurality of types of jet fans having different side support member positions are attached. Accordingly, it is possible to suppress an excessive force from being applied between the side suspension member and the connecting member by horizontally moving the connecting member. This is advantageous in calculating the strength of the side suspension member.

  In addition, according to the jet fan mounting method of the present invention, it has a step of removing the existing jet fan and a step of mounting a new jet fan having a side support member position different from that of the existing jet fan. For example, when an existing jet fan is replaced, a new jet fan with a different side support member position can be immediately attached without changing the side suspension member.

  Also, according to the jet fan mounting method of the present invention, the process of removing the existing jet fan and the process of installing the new jet fan are continuously performed, and the jet fan can be replaced without replacing the side suspension member. Can be done quickly.

  As described above, according to the present invention, it is possible to provide a jet fan mounting structure and a mounting method capable of mounting a plurality of types of jet fans having different positions of the side support members without changing the side suspension members. It is possible to quickly replace and effectively use the jet fan while solving problems in terms of cost and cost.

It is a side view which shows the attachment structure of the jet fan which concerns on Embodiment 1 of this invention. It is a side view which shows the side part suspension member which concerns on Embodiment 1 of this invention. It is a side view which shows the attachment structure of the jet fan which concerns on Embodiment 2 of this invention. It is a side view which shows the side part suspension member which concerns on Embodiment 2 of this invention. It is a side view which shows the attachment structure of the jet fan which concerns on Embodiment 3 of this invention. It is a side view which shows the side part suspension member which concerns on Embodiment 3 of this invention. It is a side view which shows the attachment structure of the jet fan which concerns on Embodiment 4 of this invention. It is a side view which shows the side part suspension member which concerns on Embodiment 4 of this invention. It is a side view which shows the attachment structure of the jet fan which concerns on Embodiment 5 of this invention. It is a side view which shows the side part suspension member which concerns on Embodiment 5 of this invention. It is a front view of the tunnel which attached the jet fan which concerns on a prior art example. It is a front view which shows the attachment structure of the jet fan which concerns on a prior art example. It is a side view which shows the attachment structure of the jet fan which concerns on a prior art example. It is a side view which shows the attachment structure of the jet fan which concerns on a prior art example. It is a side view which shows the side part suspension member which concerns on a prior art example. It is a side view which shows a hanging angle. It is a front view which shows a hanging angle.

  Next, with reference to FIG.1 and FIG.2, the attachment structure and attachment method of the jet fan which concern on Embodiment 1 of this invention are demonstrated. FIG. 1 is a side view showing a jet fan mounting structure according to the first embodiment, and FIG. 2 is a side view showing a side suspension member according to the first embodiment.

  At four locations on the side surface of the cylindrical casing of the jet fan 1, inverted U-shaped side support members 2 are provided. Two side support members 2 are provided on both sides of the side surface of the jet fan 1 with a predetermined interval. On the other hand, side suspension members 11, 12, 13 and 14 for suspending the jet fan 1 are fixed to the tunnel ceiling wall 7. The side suspension members 11, 12, 13, and 14 are positioned obliquely upward corresponding to each of the four side support members 2 provided in the jet fan 1. The side suspension members 11, 12, 13, 14 and the four side support members 2 are respectively connected by four connection members 10. As described above, the jet fan 1 is suspended from the tunnel ceiling wall 7 and supported by four points.

  The side suspension members 11, 12, 13, and 14 are each formed with a substantially triangular plate portion facing downward, and the connecting member 10 has an upper end portion that is a side of the side suspension members 11, 12, 13, and 14. It is pivotally attached to a hole formed in the plate portion, and is rotatable in the tunnel axis direction (vehicle traveling direction) around the upper end portion.

  FIG. 1 shows a state in which the jet fan 1 having a different position of the side support member 2 is attached in the first embodiment, and the suspension to which the lower end of the connecting member 10 is connected according to the position of the side support member 2. Point positions a, b, and c are shown. The relationship of the distance A between the suspension point positions a and a, the distance B between the suspension point positions b and b, and the distance C between the suspension point positions c and c is A <B <C. As shown by the dotted line in FIG. 1, when the hanging point position is different, the connecting member 10 that connects the side hanging members 11, 12, 13, 14 and the side supporting member 2 is centered on the upper end portion. It rotates in the tunnel axis direction.

  FIG. 2 is an enlarged view showing a connection portion between the side suspension member 11 and the connecting member 10 which is one of the four side suspension members. 2A shows the case of the hanging point position a, FIG. 2B shows the case of the hanging point position b, and FIG. 2C shows the case of the hanging point position c. Here, since the connecting member 10 rotates according to the position of the hanging point, there is no problem in strength such as metal fatigue at the connection portion.

  On the other hand, in designing the side suspension members 11, 12, 13, and 14, when a plurality of types of jet fans with different positions of the side support members 2 are attached, the loads are determined in advance. The strength is calculated so as to satisfy the required strength. For a plurality of types of jet fans to be subjected to strength calculation, jet fans that may be attached are extracted in advance according to the actual installation location of the jet fan. As a result, the safety problem is cleared no matter which jet fan is installed as long as it is an extracted jet fan. Of course, the connecting member 10 also needs to satisfy a predetermined strength.

Further, in the strength calculation, the weight of the jet fan and the suspension angles θ _{1 to} θ ₄ shown in FIGS. 16 and 17 are obtained for each jet fan. Here, when the weight of the jet fan is W, the force F ₁ applied to each of the side suspension members 101 and 103, the force F ₂ applied to each of the side suspension members 102 and 104, and the force of the suspension angles θ _{1 to} θ ₄ The balance is expressed by the following equation.
(2F ₂ cos θ ₄ ) cos θ ₂ + (2F ₁ cos θ ₃ ) cos θ ₁ = W
(F ₂ cos θ ₄ ) sin θ ₂ = (F ₁ cos θ ₃ ) sin θ ₁

For example, if θ ₁ = 16 °, θ ₂ = 26 °, θ ₃ = 29 °, θ ₄ = 64 °, W = 2000 kg,
F ₁ = 7.40KN
F ₂ = 9.03KN
It becomes.

  The predetermined strength may be appropriately determined based on the numerical value calculated by the above-mentioned strength calculation. For example, for each component constituting the side suspension member, (1) safety factor with respect to the yield point, (2) tension It can be determined by the safety factor for strength. The safety factor is usually 15 times. And the shape of each component which comprises a side part suspension member, material, the fixing method to a tunnel ceiling wall, etc. are determined so that the defined intensity | strength may be satisfy | filled. In addition, it is preferable to calculate the strength based on the safety factor for the yield point with higher safety.

  In this way, if the predetermined strength is satisfied with respect to the loads of a plurality of types of jet fans having different positions of the side support members 2, the jet fan can be easily replaced by the following mounting method. become.

  First, remove the existing jet fan that needs to be removed by disassembly and maintenance. And the new jet fan from which the position of a side part support member differs from the existing jet fan is attached. At this time, the connecting member 10 is attached while being rotated about the upper end in the tunnel axis direction in accordance with the position of the side support member 2 of the new jet fan. In this way, a serviced jet fan can be installed immediately without having to wait for disassembly of the existing jet fan. Of course, it is not necessary to replace the side suspension members 11, 12, 13, and 14. In this way, it is possible to continuously remove the existing jet fan and attach the new jet fan. Of course, even when a new jet fan having the same position of the existing jet fan and the side support member is installed, it is of course not necessary to replace the side suspension member in the same manner.

  Moreover, the inspection time of the side suspension members 11, 12, 13, and 14 can be shortened by setting the predetermined strength to be a higher safety strength, for example, by calculating the safety factor with respect to the yield point. it can.

  The jet fan mounting structure according to the first embodiment includes the side suspension members 11, 12, 13, and 14 provided on the tunnel ceiling wall 7, the side support member 2 provided on the side surface of the jet fan 1, and the side. A connecting member 10 that connects the part suspension members 11, 12, 13, 14 and the side support member 2 is provided. And when the several types of jet fan 1 from which the position of the side part support member 2 differs is attached, the side part suspension members 11 and 12 are satisfy | filled so that predetermined intensity | strength may be satisfy | filled with respect to the load of each jet fan 1. , 13 and 14 are calculated. Therefore, the jet fan 1 having a different position of the side support member 2 can be attached without changing the side suspension members 11, 12, 13, and 14 provided on the tunnel ceiling wall 7.

  Further, since the connecting member 10 can be rotated in the tunnel axis direction around the upper end portion of the connecting member 10, when a plurality of types of jet fans 1 having different positions of the side support members 2 are attached, By rotating the connecting member 10 according to the position of the part support member 2, it is possible to suppress an excessive force from being applied between the side suspension members 11, 12, 13, 14 and the connecting member 10. . Therefore, it is advantageous in calculating the strength of the side suspension members 11, 12, 13, and 14.

  Further, according to the jet fan mounting method according to the first embodiment, the method includes a step of removing the existing jet fan and a step of mounting a new jet fan in which the position of the side support member 2 is different from that of the existing jet fan. When replacing an existing jet fan for disassembly and maintenance, a new jet fan with a different position of the side support member 2 can be installed immediately without changing the side suspension members 11, 12, 13, and 14. it can.

  In addition, the process of removing the existing jet fan and the process of installing the new jet fan are continuously performed, and the jet fan can be replaced quickly without replacing the side suspension members 11, 12, 13, and 14. Can do.

  Next, a jet fan mounting structure according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 3 is a side view showing the jet fan mounting structure according to the second embodiment, and FIG. 4 is a side view showing the side suspension member according to the second embodiment. The jet fan mounting structure according to the second embodiment has substantially the same configuration as that of the first embodiment, but the shape of the side suspension member is different.

  The side suspension members 21, 22, 23, 24 in the jet fan mounting structure according to the second embodiment are formed in a U-shape, and the connecting member 20 has an upper end portion on the side suspension members 21, 22, 23. , 24 and is pivotable in the tunnel axis direction (vehicle traveling direction) around the upper end.

  FIG. 3 shows a state in which the jet fan 1 in which the position of the side support member 2 is different in the second embodiment is attached, and the suspension to which the lower end portion of the connecting member 20 is connected according to the position of the side support member 2. Point positions a, b, and c are shown. The relationship of the distance A between the suspension point positions a and a, the distance B between the suspension point positions b and b, and the distance C between the suspension point positions c and c is A <B <C. Then, as shown by the dotted line in FIG. 3, when the suspending point position is different, the connecting member 20 that connects the side suspension members 21, 22, 23, 24 and the side support member 2 is centered on the upper end portion. It rotates in the tunnel axis direction.

  FIG. 4 is an enlarged view showing a connection portion between the side suspension member 21 and the connecting member 20 which are one of the four side suspension members. 4A shows the case of the hanging point position a, FIG. 4B shows the case of the hanging point position b, and FIG. 4C shows the case of the hanging point position c. Here, since the connecting member 20 rotates according to the position of the hanging point, there is no problem with strength such as metal fatigue at the connection portion.

  Also in the second embodiment, the jet fan can be replaced by the same mounting method as in the first embodiment.

  According to the mounting structure and mounting method of the jet fan according to the second embodiment, the same operational effects as the mounting structure and mounting method of the jet fan according to the first embodiment are exhibited.

  The configuration for enabling the connecting member to rotate in the tunnel axis direction around the upper end of the connecting member is not limited to the configurations of the first and second embodiments, and is realized by other configurations. May be.

  Next, a jet fan mounting structure according to Embodiment 3 of the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is a side view showing the jet fan mounting structure according to the third embodiment, and FIG. 6 is a side view showing the side suspension member according to the third embodiment. The jet fan mounting structure according to the third embodiment has substantially the same configuration as that of the first embodiment, but the shape of the side suspension member is different.

  The side suspension members 31, 32, 33, and 34 in the jet fan mounting structure according to the third embodiment are formed with a substantially rectangular plate portion facing downward, and have a plurality of holes (3 in this embodiment). Is formed. The connecting member 30 has an upper end fixed to one of a plurality of holes formed in the plate portions of the side suspension members 31, 32, 33, 34, so that the upper end is in the tunnel axis direction (vehicle traveling direction). ) Can be moved horizontally.

  FIG. 5 shows a state in which the jet fan 1 in which the position of the side support member 2 is different in the third embodiment is attached, and the suspension to which the lower end portion of the connecting member 30 is connected according to the position of the side support member 2. Point positions a, b, and c are shown. The relationship of the distance A between the suspension point positions a and a, the distance B between the suspension point positions b and b, and the distance C between the suspension point positions c and c is A <B <C. As shown by the dotted line in FIG. 5, when the hanging point position is different, the upper end portion of the connecting member 30 that connects the side hanging members 31, 32, 33, 34 and the side supporting member 2 extends in the tunnel axial direction. Move horizontally.

  FIG. 6 is an enlarged view showing a connection portion between the side suspension member 31 and the connecting member 30 which are one of the four side suspension members. 6A shows the case of the hanging point position a, FIG. 6B shows the case of the hanging point position b, and FIG. 6C shows the case of the hanging point position c. Here, since the upper end part of the connection member 30 moves horizontally according to the position of the hanging point, there is no problem in strength such as metal fatigue at the connection part.

  Also in the third embodiment, first, an existing jet fan that needs to be removed by disassembly and maintenance is removed. And the new jet fan from which the position of a side part support member differs from the existing jet fan is attached. At this time, the upper end portion of the connecting member 30 is mounted while being horizontally moved in the tunnel axis direction in accordance with the position of the side support member 2 of the new jet fan. In this way, a serviced jet fan can be installed immediately without having to wait for disassembly of the existing jet fan. Of course, it is not necessary to replace the side suspension members 31, 32, 33, and 34. In this way, it is possible to continuously remove the existing jet fan and attach the new jet fan. Of course, even when a new jet fan having the same position of the existing jet fan and the side support member is installed, it is of course not necessary to replace the side suspension member in the same manner.

  Moreover, the inspection time of the side suspension members 31, 32, 33, and 34 can be shortened by setting the predetermined strength to be a higher safety strength by, for example, calculating the safety factor with respect to the yield point. it can.

  The jet fan mounting structure according to the third embodiment includes side suspension members 31, 32, 33, 34 provided on the tunnel ceiling wall 7, a side support member 2 provided on the side surface of the jet fan 1, and a side. There is provided a connecting member 30 for connecting the part suspension members 31, 32, 33, 34 and the side support member 2. Then, when a plurality of types of jet fans 1 with different positions of the side support members 2 are attached, the side suspension members 31 and 32 so as to satisfy a predetermined strength with respect to the load of each jet fan 1. , 33, and 34 are calculated. Therefore, the jet fan 1 in which the position of the side support member 2 is different can be attached without changing the side suspension members 31, 32, 33, 34 provided on the tunnel ceiling wall 7.

  Further, since the upper end portion of the connecting member 30 can be moved horizontally in the tunnel axis direction, when a plurality of types of jet fans 1 having different positions of the side support member 2 are attached, the connection member 30 is positioned at the position of the side support member 2. Accordingly, by moving the connecting member 30 horizontally, it is possible to suppress an excessive force from being applied between the side suspension members 31, 32, 33, and 34 and the connecting member 30. Therefore, the strength calculation of the side suspension members 31, 32, 33, and 34 is advantageous.

  Moreover, according to the mounting method of the jet fan which concerns on Embodiment 3, it has the process of removing the existing jet fan, and the process of attaching the new jet fan from which the position of the side part supporting member 2 differs from the existing jet fan. When replacing an existing jet fan for overhaul and maintenance, a new jet fan with a different position of the side support member 2 can be installed immediately without changing the side suspension members 31, 32, 33, and 34. it can.

  Also, the process of removing the existing jet fan and the process of installing the new jet fan are continuously performed, and the jet fan can be replaced quickly without replacing the side suspension members 31, 32, 33, and 34. Can do.

  Next, a jet fan mounting structure according to Embodiment 4 of the present invention will be described with reference to FIGS. FIG. 7 is a side view showing the jet fan mounting structure according to the fourth embodiment, and FIG. 8 is a side view showing the side suspension member according to the fourth embodiment. The jet fan mounting structure according to the fourth embodiment has substantially the same configuration as that of the third embodiment, but the shape of the side suspension member is different.

  The side suspension members 41, 42, 43, 44 in the jet fan mounting structure according to the fourth embodiment are formed with a substantially rectangular plate portion facing downward, and are provided with a plurality of recesses (3 in this embodiment). Are formed. The connecting member 40 has an upper end fixed to any one of a plurality of elongated recesses formed in the plate portions of the side suspension members 41, 42, 43, and 44 so that the upper end is in the tunnel axial direction (vehicle In the direction of travel).

  FIG. 7 shows a state in which the jet fan 1 in which the position of the side support member 2 is different in the fourth embodiment is attached, and the suspension to which the lower end portion of the connecting member 40 is connected according to the position of the side support member 2. Point positions a, b, and c are shown. The relationship of the distance A between the suspension point positions a and a, the distance B between the suspension point positions b and b, and the distance C between the suspension point positions c and c is A <B <C. As shown by the dotted line in FIG. 7, when the hang point position is different, the upper end portion of the connecting member 40 that connects the side portion suspending members 41, 42, 43, 44 and the side portion supporting member 2 extends in the tunnel axis direction. Move horizontally.

  FIG. 8 is an enlarged view showing a connecting portion between the side suspension member 41 and the connecting member 40, which is one of the four side suspension members. 8A shows the case of the hanging point position a, FIG. 8B shows the case of the hanging point position b, and FIG. 8C shows the case of the hanging point position c. Here, since the upper end part of the connection member 40 moves horizontally according to the hanging point position, strength problems such as metal fatigue do not occur in the connection part.

  In the fourth embodiment, the jet fan can be replaced by the same mounting method as in the third embodiment.

  According to the mounting structure and mounting method of the jet fan according to the fourth embodiment, the same effects as the mounting structure and mounting method of the jet fan according to the third embodiment are exhibited.

  Next, with reference to FIG.9 and FIG.10, the attachment structure of the jet fan which concerns on Embodiment 5 of this invention is demonstrated. FIG. 9 is a side view showing the jet fan mounting structure according to the fifth embodiment, and FIG. 10 is a side view showing the side suspension member according to the fifth embodiment. The jet fan mounting structure according to the fifth embodiment has substantially the same configuration as that of the third embodiment, but the shape of the side suspension member is different.

  The side suspension members 51, 52, 53, and 54 in the jet fan mounting structure according to the fifth embodiment are formed with a substantially rectangular plate portion facing downward, and are connected to a hole formed in the plate portion. The member 50 is connected. The side suspension members 51, 52, 53, 54 move along the rail member 55 fixed to the tunnel ceiling wall, and are fixed by bolts 56, 56 at arbitrary positions. Thereby, the upper end part of the connection member 50 is horizontally movable in a tunnel axial direction (vehicle advancing direction).

  FIG. 9 shows a state in which the jet fan 1 in which the position of the side support member 2 is different in the fifth embodiment is attached, and the suspension to which the lower end portion of the connecting member 50 is connected according to the position of the side support member 2. Point positions a, b, and c are shown. The relationship of the distance A between the suspension point positions a and a, the distance B between the suspension point positions b and b, and the distance C between the suspension point positions c and c is A <B <C. Then, as shown by the dotted line in FIG. 9, when the suspending point position is different, the upper end portion of the connecting member 50 that connects the side suspension members 51, 52, 53, 54 and the side support member 2 is in the tunnel axis direction. Move horizontally.

  FIG. 10 is an enlarged view showing a connection portion between the side suspension member 51 and the connecting member 50, which is one of the four side suspension members. As the side suspension member 51 moves to the left and right along the rail member 55, the upper end portion of the connecting member 50 moves horizontally according to the position of the suspension point. It does not occur.

  In the fifth embodiment, the jet fan can be replaced by the same mounting method as in the third embodiment.

  According to the mounting structure and mounting method of the jet fan according to the fifth embodiment, the same effects as the mounting structure and mounting method of the jet fan according to the third embodiment are exhibited.

  Note that the configuration for enabling the upper end portion of the connecting member to move horizontally in the tunnel axis direction is not limited to the configurations of the third to fifth embodiments, and may be realized by other configurations.

  As described above, according to the mounting structure and mounting method of the jet fan according to the present embodiment, it is possible to mount a plurality of types of jet fans with different positions of the side support members without changing the side suspension members. Thus, the jet fan can be quickly replaced and effectively used while solving the safety and cost problems.

  Some types of jet fans have different diameters, and the positions of the side support members in the tunnel cross-sectional direction differ depending on the diameter. Therefore, when a jet fan with a different diameter is attached without changing the side suspension member, the side suspension member can be rotated around the upper end of the connecting member in the tunnel cross-sectional direction, It is preferable to avoid strength problems such as metal fatigue at the connecting portion of the connecting member.

DESCRIPTION OF SYMBOLS 1 Jet fan 2 Side part support member 3 Top part suspension member 4 Connection member 5 Top part support member 6 Tunnel 7 Tunnel ceiling wall 10 Connection member 11 Side part suspension member 12 Side part suspension member 13 Side part suspension member 14 Side part suspension member 20 Connection Member 21 Side suspension member 22 Side suspension member 23 Side suspension member 24 Side suspension member 30 Connection member 31 Side suspension member 32 Side suspension member 33 Side suspension member 34 Side suspension member 40 Connection member 41 Side portion Suspension member 42 Side suspension member 43 Side suspension member 44 Side suspension member 50 Connection member 51 Side suspension member 52 Side suspension member 53 Side suspension member 54 Side suspension member 55 Rail member 56 Bolt 100 Connection member 101 side Side suspension member 102 Side suspension member 103 Side suspension member 104 Side suspension member

Claims (5)

A jet fan comprising: a side suspension member provided on a tunnel ceiling wall; a side support member provided on a side surface of the jet fan; and a connecting member that connects the side suspension member and the side support member. The mounting structure of
When a plurality of types of jet fans extracted in advance with different positions of the side support members are installed without replacing the side suspension members , the predetermined strength is satisfied with respect to the load of each jet fan. Further, the jet fan mounting structure is characterized in that the strength of the side suspension member is calculated. The positions of the side support members of the plurality of types of pre-extracted jet fans are different along the tunnel axis direction,
2. The jet fan mounting structure according to claim 1, wherein the connecting member is rotatable in a tunnel axial direction around an upper end portion of the connecting member. The positions of the side support members of the plurality of types of pre-extracted jet fans are different along the tunnel axis direction,
The jet fan mounting structure according to claim 1, wherein an upper end portion of the connecting member is horizontally movable in a tunnel axis direction. A method for mounting a jet fan having the mounting structure according to any one of claims 1 to 3,
Removing the existing jet fan;
A method for mounting a jet fan, comprising: a step of mounting a new jet fan having a position of a side support member different from that of the existing jet fan. A method for mounting a jet fan having the mounting structure according to any one of claims 1 to 3,
A method for mounting a jet fan, wherein the step of removing an existing jet fan and the step of mounting a new jet fan are continuously performed without replacing the side suspension member.