JP6696831B2 - Underfloor structure and railway vehicles - Google Patents

Description

  The present invention relates to a vehicle underfloor structure and a railway vehicle.

  In a railway vehicle in which an underfloor device is arranged at a lower portion, a vehicle underfloor structure that covers the underfloor device may be applied from the viewpoint of protecting the underfloor device during traveling. As such a vehicle underfloor structure, for example, a casing provided on the lower portion of the railway vehicle and covering the underfloor equipment of the railway vehicle with its outer plate, and an outer panel of the casing for inspecting the underfloor equipment, etc. There is a vehicle underfloor structure that includes an opening and a cover that is openably and closably attached to an outer plate so as to close the opening. For example, in the vehicle underfloor structure described in Patent Document 1, a cover is attached to the outer plate of the housing by a latch provided on the outer plate of the housing.

JP-A-8-301106

  By the way, some railroad cars run at high speed like the Shinkansen. When a railway vehicle traveling at high speed travels in an area with a large amount of snow, for example, ice blocks may be rolled up at high speed during traveling. In this case, in the vehicle underfloor structure of Patent Document 1 described above, when the rolled-up ice block collides with the cover attached to the opening of the housing, the latch is deformed by an external force on the cover, and the cover is removed from the outer plate of the housing. It may come off.

  Therefore, an object of the present invention is to provide a vehicle underfloor structure and a railway vehicle that can reduce the cover coming off the outer plate.

  The present invention provides a casing provided on a lower portion of a railcar, which covers the underfloor equipment of the railcar with its outer plate, an opening formed in the outer plate, and a cover attached to the outer plate so as to close the opening. And a latch provided on one of the outer plate and the cover and attached to the latch attachment portion of one of the outer plate and the cover, and provided on the other of the outer plate and the cover, and the cover is attached to the outer plate. The latch receiver of the latch that is separated from the latch mounting part so that it does not come off, and the latch receiver that abuts the contact portion of the latch, and the force that acts on the latch from the latch receiver by the external force to the cover. The vehicle underfloor structure includes a deformation suppressing member that suppresses the deformation of the latch by contacting the deformation suppressing member contact portion of the latch from the side opposite to the contact portion.

  According to this configuration, the housing is provided in the lower portion of the railcar, and the outer plate covers the underfloor equipment of the railcar, the opening formed in the outer plate, and the outer plate is attached so as to close the opening. And a latch attached to one of the outer plate and the cover and attached to the latch attachment part of one of the outer plate and the cover, and provided on the other of the outer plate and the cover. In an under-floor structure for a vehicle, which includes a latch receiving member of the latch which is separated from the latch mounting portion so as not to come off from the plate, and a latch receiving member that abuts against the abutting portion, an external force to the cover causes the latch receiving member to engage through the latch receiving abutting portion With respect to the acting force, the deformation suppressing member contacts the deformation suppressing member contact portion of the latch from the side opposite to the latch receiving and contacting portion, whereby deformation of the latch is suppressed. This can prevent the cover from coming off the outer plate.

  In this case, it is preferable that the distance between the deformation suppressing member contact portion and the latch mounting portion is shorter than the distance between the latch receiving contact portion and the latch mounting portion.

  According to this configuration, the distance between the deformation suppressing member contact portion and the latch mounting portion is shorter than the distance between the latch receiving contact portion and the latch mounting portion, so that the deformation suppressing member acts as the deformation suppressing member contact portion. Since the center point of the deformation of the latch after the contact moves from the latch mounting portion to the deformation suppressing member contact portion, the moment of force from the latch receiving contact portion around the center point of the deformation of the latch decreases, The deformation of the latch can be effectively suppressed.

  Further, it is preferable that the deformation suppressing member contacts the deformation suppressing member abutting portion after the latch is deformed with respect to the force acting on the latch via the latch receiving abutment portion by the external force to the cover. ..

  According to this configuration, since the external force to the cover is absorbed by the deformation of the latch before the deformation of the latch is suppressed by the deformation suppressing member, a large external force is applied to the latch mounting portion, and the latch mounting portion is damaged. It is possible to reduce the disengagement of the cover from the outer plate.

  Further, the amount of deformation of the latch in the direction in which the latch and the latch receiver contact each other with respect to the force exerted on the latch from the latch receiver by the external force to the cover through the latch receiver contact portion, It is preferable that the amount of deformation of the latch mounting portion in the abutting direction is larger than that.

  According to this configuration, before the deformation of the latch is suppressed by the deformation suppressing member, an external force to the cover is absorbed by the latch having a larger deformation amount than the latch mounting portion, so that a large external force is applied to the latch mounting portion. It is possible to reduce the possibility that the latch mounting portion is damaged and the cover comes off the outer plate.

  Further, the present invention is a railway vehicle having the above-mentioned under-floor structure of the present invention in a lower portion.

  According to the under-floor structure and the railway vehicle of the present invention, the cover can be prevented from coming off the outer plate.

FIG. 1 is a bottom view of a railway vehicle to which a vehicle underfloor structure according to an embodiment is applied. It is a top view of the vehicle underfloor structure of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. (A) is an enlarged view of the latch and the latch receiver of FIG. 3, and (B) is a view showing a deformed state of the latch of (A).

  Hereinafter, a vehicle underfloor structure and a railway vehicle according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, a railway vehicle 1 of the present embodiment includes a vehicle underfloor structure 10 of the present embodiment in a lower portion 2 on which wheels 5 and the like are arranged. The railway vehicle 1 is, for example, a bullet train vehicle, and is a vehicle that is operated over a long distance at a high speed exceeding 200 km / h. Under the floor of the railway vehicle 1, underfloor equipment such as a power supply device, a control device, a battery, an inverter device, an auxiliary power supply device, and an air conditioner are mounted in a suspended state on a vehicle underframe. As shown in FIGS. 2 and 3, the vehicle underfloor structure 10 includes a housing 11, an opening 13, a cover 14, a latch 23, a latch receiver 25, and a deformation suppressing member 29. The vehicle underfloor structure 10 is provided so as to cover the underfloor equipment from the viewpoint of protecting the underfloor equipment 34 from snow accretion during traveling.

  The casing 11 is provided in the lower portion 2 of the railway vehicle 1, and an outer plate 12 thereof covers the underfloor equipment 34 such as the power supply device, control device, battery, inverter device, auxiliary power supply device, and air conditioner of the railway car 1. The housing 11 is made of metal such as stainless steel. The outer plate 12 is, for example, a bottom plate that covers a lower side of the underfloor device 34, but may include a side plate that covers a side of the underfloor device 34. The outer plate 12, which is a bottom plate, is formed with a rectangular or square opening 13 that opens downward from the railway vehicle 1. The opening 13 is formed for inspecting the underfloor equipment 34 and the like.

  The cover 14 is attached to the outer plate 12 so as to smoothly close the opening 13. The cover 14 is formed of a metal such as stainless steel, and is a rectangular or square plate-like member corresponding to the shape of the opening 13. The cover 14 has a pair of hinge shaft engaging portions 17 that engage with one hinge shaft 16 provided on the outer plate 12 near the end 15 at one end 15. The outer plate 12 is provided with a pair of hinge shafts 16 near the end portion 15, and the cover 14 has a total of two pairs of hinge shaft engaging portions 17 that engage with the pair of hinge shafts 16, respectively. is doing.

  The outer plate 12 has a pair of hinge bearing portions 18 supporting one hinge shaft 16 near the end portion 15. The outer plate 12 is provided with a pair of hinge shafts 16 in the vicinity of the end portion 15, and the outer plate 12 has a total of two pairs of hinge bearing portions 18 that support each of the pair of hinge shafts 16. There is. The pair of hinge shafts 16, the pair of hinge shaft engaging portions 17, and the pair of hinge bearing portions 18 form a pair of hinge mechanisms 19. The pair of hinge mechanisms 19 are supported by a hinge mechanism support plate 20 attached to the outer plate 12 in the vicinity of the end portion 15 by a support plate attachment metal fitting 21. Note that, in FIG. 3, the support plate mounting member 21 is not shown for simplification.

  The cover 14 is attached by a hinge mechanism 19 so as to be rotatable around a hinge shaft 16. Therefore, the cover 14 is attached to the outer plate 12 so that the opening 13 can be opened and closed. Further, when the surface of the cover 14 is parallel to the ground, the hinge shaft 16 and the hinge shaft engaging portion 17 are engaged with each other, but the surface of the cover 14 is 20 ° to 90 ° with respect to the ground. The hinge shaft engaging portion 17 can be removed from the hinge shaft 16 in the state of forming the angle. Therefore, the cover 14 can be removed from the outer plate 12 after the surface of the cover 14 forms an arbitrary angle of 20 ° to 90 ° with respect to the ground.

  As shown in FIG. 2, FIG. 3 and FIG. 4 (A), the cover 14 is attached to the end 33 on the opposite side of the end 15 and to the cover receiving member 30 provided on the outer plate 12 near the end 33. It has the cover money receiving engagement part 31 which engages. At the end portion 15, the cover 14 is rotatably attached about the hinge shaft 16 by the hinge mechanism 19. Therefore, if the cover money 30 and the cover money engagement portion 31 are not present, the end portion of the cover 14 is gravitated. 33 hangs downward. However, at the end portion 33, when the cover receiving engagement portion 31 engages with the cover receiving member 30 so that an external force other than gravity does not act on the cover 14, the cover 14 has a surface of the cover 14 on the ground. On the contrary, it is kept horizontal.

  The latch 23 is provided on the end 33 of the cover 14 and is attached to the latch mounting portion 22 of the end 33 of the cover 14. The latch mounting portion 22 is supported by a latch lock 32. The end portion 33 is provided with a pair of latches 23, a latch attaching portion 22, and a latch lock 32. The latch 23 has a strength that is more easily deformed than the outer plate 12, the cover 14, the latch mounting portion 22, the latch receiver 25, and the deformation suppressing member 29, and is defined by, for example, Japanese Industrial Standards (JIS). It is a flat member made of stainless steel such as SUS304. The latch 23 is rotatably mounted around the latch mounting portion 22 by the latch mounting portion 22 and the latch lock 32 as shown by the arrow in FIG. Further, the latch 23 is biased upward by the latch mounting portion 22 and the latch lock 32. The latch attaching portion 22 and the latch lock 32 are made of, for example, stainless steel such as SUS304, and are formed to have a strength that is less likely to deform than the latch 23.

  The latch receiver 25 is provided in the vicinity of the end portion 33 of the outer plate 12, and abuts against the latch receiving contact portion 24 of the latch 23 separated from the latch mounting portion 22 so that the cover 14 does not come off from the outer plate 12 from above. .. In the vicinity of the end portion 33 of the outer plate 12, there is provided a pair of latch receivers 25 that come into contact with the respective latch receiver contact portions 24 of the pair of latches 23 from above. The latch 25 is made of, for example, stainless steel such as SUS304 and has a strength that is less likely to be deformed than the latch 23. The pair of latch receivers 25 are supported by a latch receiver support plate 26 attached to the outer plate 12 near the end 33 by a support plate mounting bracket 27. In addition, in FIG. 3, FIG. 4 (A), and FIG. 4 (B), for simplification, the illustration of the support plate mounting bracket 27 is omitted.

  When the latch 23 and the latch receiver 25 are in contact with each other, the latch 23 is engaged with the latch receiver 25 while being urged toward the latch receiver 25 by the latch mounting portion 22 and the latch lock 32. In the state where the latch 23 is engaged with the latch receiver 25, the operation in the direction in which the cover 14 hangs downward around the hinge shaft 16 is restricted by the cover receiver 30 and the cover receiver engaging portion 31, and the cover 14 is hinged. The operation in the direction of jumping up around the shaft 16 is limited by the latch 23 and the latch receiver 25. Therefore, when the latch 23 is engaged with the latch receiver 25, the cover 14 is locked so as to always close the opening 13.

  As described above, the latch 23 can be rotated around the latch mounting portion 22 from below the cover 14 using a wrench or the like. As shown by the arrow in FIG. 2, when the latch 23 is rotated at an angle of about 90 ° from the state where the latch 23 is engaged with the latch receiver 25, the latch 23 is disengaged from the latch receiver 25, and the cover 14 Is unlocked. In the state where the cover 14 is unlocked, the operation in the direction in which the cover 14 hangs downward around the hinge shaft 16 is limited by the cover receiving member 30 and the cover receiving engaging portion 31, but the cover 14 does not move. The movement in the direction of jumping up around is not limited. Therefore, when the cover 14 is unlocked, the cover 14 can be opened and closed with respect to the opening 13.

  As shown in FIG. 2, FIG. 3 and FIG. 4 (A), the deformation suppressing member 29 is against the force acting on the latch 23 from the latch receiver 25 through the latch receiving contact portion 24 by the external force to the cover 14. The deformation of the latch 23 is suppressed by contacting the deformation suppressing member contact portion 28 of the latch 23 from the side opposite to the latch receiving and contacting portion 24. A pair of deformation suppressing members 29 are provided at the end portion 33 of the cover 14 corresponding to each of the pair of latches 23. The deformation suppressing member 29 is an L-shaped metal fitting that is detachably attached to the end portion 33 of the cover 14 with screws, bolts, nuts, or the like. The deformation suppressing member 29 is made of, for example, stainless steel such as SUS304 or the like and has a strength that is less likely to be deformed than the latch 23. The deformation suppressing member 29 can be attached to an existing railway vehicle or vehicle underfloor structure.

As shown in FIG. 4A, the distance d ₁ between the deformation suppressing member contact portion 28 and the latch mounting portion 22 is shorter than the distance d ₂ between the latch receiving contact portion 24 and the latch mounting portion 22. ing. Further, in a state where the latch 23 and the latch receiver 25 are in contact with each other and the latch 23 is engaged with the latch receiver 25, the deformation suppressing member contact portion 28 and the deformation suppressing member 29 are separated from each other without contacting each other. It is in a state.

  Hereinafter, the operation of the vehicle underfloor structure 10 of the present embodiment will be described. For example, it is assumed that the railway vehicle 1 travels at a high speed in an area with a large amount of snow, and the rolled ice blocks collide with the cover 14 attached to the opening 13 of the housing 11. In this case, a strong external force F is applied to the cover 14. After the latch 23 is deformed by the force acting on the latch 23 from the latch receiver 25 via the latch receiver contact portion 24 by the external force F to the cover 14, the deformation suppressing member 29 contacts the deformation suppressing member contact portion 28. Contact.

Further, the deformation amount δ of the latch 23 in the direction in which the latch 23 and the latch receiver 25 are in contact with each other with respect to the force that acts on the latch 23 from the latch receiver 25 via the latch receiver contact portion 24 by the external force F to the cover 14. ₁ is larger than the deformation amount δ ₂ of the latch mounting portion 22 in the direction in which the latch 23 and the latch receiver 25 contact each other.

Note that the direction in which the latch 23 and the latch receiver 25 contact each other means, for example, the direction in which the latch 23 and the latch receiver 25 contact each other before the latch 23 is deformed, and in the example of FIG. It means a direction perpendicular to the surface of the plate-shaped latch 23 before deformation, which is indicated by a broken line. Further, the deformation amount δ ₁ of the latch 23 in the direction in which the latch 23 and the latch receiver 25 contact each other is, for example, in the direction in which the latch 23 and the latch receiver 25 contact each other before the latch 23 is deformed. It means the amount of displacement of the portion having the largest displacement with respect to the portion attached by the latch attaching portion 22. The deformation amount δ ₂ of the latch mounting portion 22 in the direction in which the latch 23 and the latch receiver 25 contact each other is the deformation amount of the latch 23 in the direction in which the latch 23 and the latch receiver 25 contact each other before the latch 23 deforms. It means the amount of displacement of the front and rear latch mounting portions 22 at the position where the latch 23 is mounted.

  In the present embodiment, a casing 11 that is provided in the lower portion 2 of the railway vehicle 1 and covers the underfloor equipment 34 of the railway vehicle 1 with its outer plate 12, an opening 13 formed in the outer plate 12, and an opening 13 are provided. A cover 14 attached to the outer plate 12 so as to close it, a latch 23 provided on the cover 14 and attached to a latch attachment portion 22 of the cover 14, and provided on the outer plate 12, the cover 14 is removed from the outer plate 12. In the vehicle underfloor structure 10 that includes the latch receiver 25 that contacts the latch receiver contact portion 24 of the latch 23 that is separated from the latch mount portion 22, the external force F to the cover 14 causes the latch receiver 25 to contact the latch receiver contact portion. The deformation suppressing member 29 contacts the deformation suppressing member contact portion 28 of the latch 23 from the side opposite to the latch receiving contact portion 24 against the force acting on the latch 23 through the deformation of the latch 23. Is suppressed. As a result, the cover 14 can be prevented from coming off the outer plate 12.

Further, in the present embodiment, the distance d ₁ between the deformation suppressing member contact portion 28 and the latch mounting portion 22 is shorter than the distance d ₂ between the latch receiving contact portion 24 and the latch mounting portion 22, so that the deformation suppression Since the center point of the deformation of the latch 23 after the member 29 contacts the deformation suppressing member contact portion 28 moves from the latch mounting portion 22 to the deformation suppressing member contact portion 28, the deformation center point of the latch 23 around The moment of force from the latch receiving / contacting portion 24 is reduced, and the deformation of the latch 23 can be suppressed more effectively.

  Further, in this embodiment, since the external force F on the cover 14 is absorbed by the deformation of the latch 23 before the deformation of the latch 23 is suppressed by the deformation suppressing member 29, a large external force F is applied to the latch mounting portion 22. As a result, the latch mounting portion 22 is damaged and the cover 14 can be prevented from coming off the outer plate 12.

In addition, in the present embodiment, before the deformation of the latch 23 is suppressed by the deformation suppressing member 29, the external force F on the cover 14 is absorbed by the latch 23 having the deformation amount δ ₁ larger than the deformation amount δ ₂ of the latch attachment portion 22. Therefore, it is possible to prevent the latch mounting portion 22 from being damaged by the large external force F applied to the latch mounting portion 22, and the cover 14 from coming off the outer plate 12.

  Further, the underfloor structure 10 of the present embodiment can be realized simply by attaching the deformation suppressing member 29 to the underfloor structure of an existing railway vehicle, and is extremely easy to implement.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be implemented in various forms. For example, in the above-described embodiment, the description has been centered on the example in which the opening 13 closed by the cover 14 is formed in the outer plate 12 that is the bottom plate. However, for example, the opening 13 is formed in the outer plate 12 that is the side plate. It may have been done. Further, in the above-described embodiment, the description has been centered on the case where the cover 14 is provided with the latch 23 and the outer plate 12 is provided with the latch receiver 25. However, the cover 14 is provided and the outer plate 12 is provided with the latch receiver 25. The latch 23 may be provided, and the latch 23 may be attached to the latch mounting portion 22 of the outer plate 12.

Further, in the above embodiment, the distance d ₁ between the deformation suppressing member contact portion 28 and the latch mounting portion 22 is mainly shorter than the distance d ₂ between the latch receiving contact portion 24 and the latch mounting portion 22. Although described, depending on the situation, the distance d ₁ between the deformation suppressing member contact portion 28 and the latch mounting portion 22 may be equal to or greater than the distance d ₂ between the latch receiving contact portion 24 and the latch mounting portion 22. Further, in the above-described embodiment, the deformation suppressing member 29 suppresses the deformation after the latch 23 is deformed against the force that acts on the latch 23 from the latch receiver 25 via the latch receiving contact portion 24 by the external force F to the cover 14. Although the example in which the member abuts on the member abutment portion 28 is mainly described, depending on the situation, the external force F on the cover 14 causes the latch 23 to contact the latch 23 with respect to the force acting on the latch 23 via the latch receiving abutment 24. The deformation suppressing member 29 may contact the deformation suppressing member contact portion 28 before the deformation of the member 23.

DESCRIPTION OF SYMBOLS 1 ... Rail vehicle, 2 ... Lower part, 5 ... Wheel, 10 ... Vehicle underfloor structure, 11 ... Housing, 12 ... Outer plate, 13 ... Opening part, 14 ... Cover, 15 ... End part, 16 ... Hinge shaft, 17 ... Hinge shaft engaging portion, 18 ... Hinge bearing portion, 19 ... Hinge mechanism, 20 ... Hinge mechanism support plate, 21 ... Support plate mounting metal fitting, 22 ... Latch mounting portion, 23 ... Latch, 24 ... Latch receiving contact portion, 25 ... latch receiver, 26 ... latch receiving support plate, 27 ... support plate mounting bracket, 28 ... deformation suppressing member abutting portion, 29 ... deformation suppressing member, 30 ... cover receiving member, 31 ... cover receiving engaging portion, 32 ... latch lock, 33 ... end 34 ... floor equipment, F ... external force, _{d 1,} d 2 _... distance, [delta] _1, [delta] ₂ ... deformation amount.

Claims (5)

A casing provided in the lower portion of the railway vehicle and covering the underfloor equipment of the railway vehicle with its outer plate,
An opening formed in the outer plate,
A cover attached to the outer plate so as to close the opening,
A latch provided on one of the outer plate and the cover and attached to a latch attachment portion of one of the outer plate and the cover,
A latch receiver that is provided on either the outer plate or the cover and that abuts on a latch receiving contact portion of the latch that is separated from the latch mounting portion so that the cover does not come off the outer plate,
With respect to the force exerted on the latch from the latch receiver by the external force to the cover via the latch receiver contact portion, the deformation suppressing member contact portion of the latch is contacted from the side opposite to the latch receiver contact portion. A vehicle underfloor structure comprising: a deformation suppressing member that suppresses deformation of the latch by contacting with each other.   The underfloor structure according to claim 1, wherein a distance between the deformation suppressing member contact portion and the latch mounting portion is shorter than a distance between the latch receiving contact portion and the latch mounting portion.   The deformation suppressing member abuts the deformation suppressing member abutting portion after the latch is deformed with respect to a force acting on the latch via the latch receiving abutting portion from an external force on the cover. The underfloor structure for a vehicle according to claim 1 or 2.   The deformation amount of the latch in the direction in which the latch and the latch receiver contact each other with respect to the force exerted on the latch from the latch receiver by the external force to the cover through the latch receiver contact portion is the latch. The vehicle underfloor structure according to any one of claims 1 to 3, wherein a deformation amount of the latch mounting portion in a direction in which the and the latch receiver are in contact with each other is larger.   A railway vehicle having the vehicle underfloor structure according to any one of claims 1 to 4 at a lower portion.

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