JP2014180996A - Vehicular table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular table allowing compatibility of light weight with load bearing property and excellent in maintainability.SOLUTION: There is provided a vehicular table 1 capable of installing turnably on the interior member of a vehicle. The vehicular table 1 is provided with a top plate 11 having the surface 11A and a rear face 11B, and a side part 12 erected at the edge part of the top plate 11. The top plate 11 and side part 12 are formed by any light alloy of an aluminum alloy, magnesium alloy including aluminum and manganese, and magnesium alloy including aluminum and zinc. In the rear face 11B of the top plate 11, a flat protrusion 13 lower than the height of the side part 12 is formed.

Description

  The present invention relates to a vehicle table that is attached to a rear portion of a seat of a railway vehicle or the like.

  Conventionally, a synthetic resin table has been widely used as a vehicle table attached to a seat rear portion of a railway vehicle or the like (see Patent Documents 1 and 2 below). As the synthetic resin, for example, FRP (Fiber Reinforced Plastics) or the like is used. A table made of synthetic resin is generally manufactured by press molding, and a reinforcing rib shape is provided on the back surface of the table top plate.

Japanese Patent Laid-Open No. 10-138920 JP 2005-96489 A

  By the way, in the vehicle table manufactured with organic materials, such as the above-mentioned synthetic resin, there exists a problem that a table tends to be cracked by the chemical deterioration by a washing | cleaning liquid, or aged deterioration, and a maintenance cost increases. On the other hand, a vehicular table manufactured from a metal material has the advantage that it is stronger and less susceptible to cracking than an organic material, but there is a problem that it is difficult to achieve both load resistance and light weight.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle table that is excellent in maintainability while achieving both lightness and load resistance.

  In order to solve the above problems, a vehicle table according to the present invention is a vehicle table that is rotatably attached to an interior member of a vehicle, and includes a top plate portion having a front surface and a back surface, and a back surface side of the top plate portion. And a side part erected on the edge of the top plate part, and the top plate part and the side part are made of an aluminum alloy, a magnesium alloy containing aluminum and manganese, and a magnesium alloy containing aluminum and zinc. A flat convex portion that is lower than the height of the side surface portion is formed on the back surface of the top plate portion.

  In this vehicle table, the top plate portion and the side surface portion are formed of a light alloy that is lightweight and easy to process. Therefore, a flat convex portion lower than the height of the side surface portion can be easily formed on the back surface of the top plate portion, and the load resistance of the top plate portion can be sufficiently enhanced by the convex portion. Further, by adopting a flat convex portion, it is possible to ensure lightness while maintaining a strength comparable to that of a plurality of large ribs provided on a conventional FRP table or the like. Furthermore, the light alloy described above is less susceptible to deterioration than organic materials, and can suppress cracks and the like that are caused by chemical deterioration due to cleaning liquid and aging deterioration. For this reason, the maintainability of the vehicle table is also facilitated.

  Moreover, the convex part may be integrally formed with the top plate part by injection molding. Thereby, a convex-shaped part can be formed in a top-plate part at once. Further, a convex portion with high dimensional accuracy can be obtained as compared with the press working used for manufacturing the conventional FRP table.

  Moreover, the shaft member for attaching the vehicle table to the interior member may be formed integrally with the side surface portion by injection molding. In this case, it is not necessary to separately perform the step of forming the opening for embedding the shaft member in the side surface, and the manufacturing process can be simplified.

  Further, the convex portion may be exposed to the outside. In this case, the manufacturing process can be simplified and the material cost can be reduced by omitting the back cover that covers the back surface of the top plate. Moreover, even if the convex portion is exposed, the convex portion is flat, so that the touch is good and there is no possibility of giving the user unpleasant feeling.

  Further, the side surface portion may be further provided with a back cover that is provided with an inward flange portion and is joined to the flange portion to form a hollow structure with the top plate portion. In this case, by providing the back cover, it is possible to improve the appearance and feel of the vehicle table. Moreover, the load resistance of the vehicle table can be further ensured by making the interior of the vehicle table have a hollow structure.

  Further, the height of the side surface portion decreases from the proximal end side to the distal end side of the top plate portion, while the height of the convex portion may be constant. In this case, the load resistance can be further ensured by reducing the front end side of the table. On the other hand, since the flat convex shape is adopted, the strength of the top plate portion can be maintained by making the height of the convex portion constant regardless of the height of the side surface portion.

  Moreover, it is preferable that the area which a convex-shaped part occupies is 20%-60% of the area of the whole back surface. In this case, it is possible to make the shape of the back surface of the top plate portion more comfortable to touch while giving sufficient strength as a vehicle table.

  Moreover, it is preferable that the height of a convex-shaped part is 0.3 mm-2.0 mm. In this case, it is possible to make the shape of the back surface of the top plate portion more comfortable to touch while giving sufficient strength as a vehicle table.

  Further, the aspect ratio of the convex portion, that is, the ratio of the height of the convex portion to the width of the convex portion in the direction in which the width of the convex portion is minimized (the height of the convex portion / the width of the convex portion) is 0.004 to 0.05 is preferable. In this case, it is possible to make the shape of the back surface of the top plate portion more comfortable to touch while giving sufficient strength as a vehicle table.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle table excellent in maintainability can be provided, having made lightweight and load-bearing property compatible.

It is a figure which shows an example of the seat to which the vehicle table which concerns on 1st Embodiment of this invention was attached. It is the perspective view which looked at the table for vehicles from the surface side. It is the perspective view which looked at the table for vehicles from the back side. It is a side view of the table for vehicles. It is the VV sectional view taken on the line in FIG. It is sectional drawing of the convex-shaped part formed in the back surface of a top-plate part. It is a bottom view before the back cover attachment of the vehicle table which concerns on 2nd Embodiment. It is the VIII-VIII line end view in FIG. It is a bottom view after the back cover attachment of the table for vehicles shown in FIG. FIG. 10 is an end view taken along line XX in FIG. 9.

  Hereinafter, a preferred embodiment of a vehicle table according to the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram illustrating an example of a seat to which a vehicle table according to the first embodiment of the present invention is attached. As shown in FIG. 1, the vehicle seat 2 is a member provided as an interior member in a vehicle such as a railcar. In the rear part of the vehicle seat 2, a recess 2 </ b> A that forms a substantially rectangular parallelepiped space S for housing the vehicle table 1 is provided. An attachment support member 2B that rotatably supports the vehicle table 1 with respect to the vehicle seat 2 is provided on the lower side of the recess 2A. The vehicle table 1 is located between a storage position in which the vehicle table 1 is stored substantially vertically in the space S in the recess 2A and a use position in which the vehicle table 1 is pulled out substantially horizontally toward the rear of the vehicle seat 2 via the mounting support member 2B. It is pivotally attached.

  Subsequently, each configuration of the above-described vehicle table 1 will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a perspective view of the vehicle table 1 as viewed from the front side. FIG. 3 is a perspective view of the vehicle table 1 as seen from the back side. As shown in these drawings, the vehicle table 1 includes a top plate portion 11 and a side surface portion 12.

  The top plate portion 11 has a substantially rectangular shape, and has a front surface 11A and a back surface 11B. Both the base end part 11a and the side part 11c of the top plate part 11 are linear, and a rectangular cutout part 11d is formed at a corner formed by the base end part 11a and the side part 11c. Yes. Moreover, the front-end | tip part 11b of the top-plate part 11 has made the loose arch shape so that it may become convex toward the front end side, and the corner | angular part which the front-end | tip part 11b and the side part 11c make becomes R shape. Yes.

  The surface 11A of the top plate portion 11 faces upward when the table is used and forms a placement surface on which an object or the like is placed. In addition, a concave portion C having a circular cross section for placing a beverage container such as a plastic bottle, a can, or a paper cup is provided on the base end side of the top plate portion 11. The inner wall surface of the recess C is widened toward the opening end side from the bottom surface side to prevent the beverage container from being caught.

  As shown in FIG. 3, the side surface portion 12 is erected along the edge of the top plate portion 11 on the back surface 11 </ b> B side of the top plate portion 11. That is, the base end portion 12a and the side portion 12c of the side surface portion 12 are both linear, and a rectangular cutout portion 12d is formed at a corner portion formed by the base end portion 12a and the side portion 12c. ing. Further, the front end portion 12b of the side surface portion 12 has a gentle arch shape corresponding to the front end portion 11b so as to be convex toward the front end side, and the corner portion formed by the front end portion 12b and the side portion 12c is R shape.

  Further, as shown in FIG. 4, the height of the side portion 12c is constant from the base end portion 12a to the vicinity of the position where the concave portion C is formed. It gradually decreases toward the tip side. Further, as shown in FIGS. 3 and 5, on the base end side of the side surface portion 12, a substantially rectangular parallelepiped shaped shaft embedding portion 12 e is formed inside the notch portion 12 d. One end side of the rotation shaft (shaft member) 14A and the rotation restricting shaft (shaft member) 14B is embedded in the shaft embedding portion 12e with a predetermined interval. The rotation shaft 14 </ b> A is attached to the attachment support member 2 </ b> B and serves as a shaft that serves as a rotation fulcrum of the vehicle table 1. The rotation restricting shaft 14B is an axis that restricts the rotation of the vehicle table 1 between the vertical direction and the horizontal direction. In the present embodiment, as an example, as shown in FIG. 1, the mounting support member 2B has a holding portion 2a that rotatably holds the rotation shaft 14A and the rotation of the rotation restriction shaft 14B in the vertical and horizontal directions. And a regulating portion 2b that regulates between the two.

  The top plate portion 11 and the side surface portion 12 as described above are light of any one of an aluminum alloy, a magnesium alloy containing aluminum and manganese (AM-based alloy), and a magnesium alloy containing aluminum and zinc (AZ-based alloy). It is integrally formed of an alloy.

  Here, as the AM-based alloy, for example, an AM60 magnesium alloy having aluminum and manganese contents of about 6% and 1% or less, respectively, can be used. Since the AM-based alloy is excellent in ductility, when the top plate portion 11 and the side surface portion 12 are formed of an AM-based alloy, the top plate portion 11 and the side surface portion 12 are broken by receiving a large impact. However, the fractured surface is less likely to have a sharp shape, and safety is improved. Further, as the AM alloy, a magnesium alloy (AMX alloy) in which calcium is added in addition to aluminum and manganese may be used. The AMX alloy is excellent in ductility and is improved in strength as is the case with the AM alloy.

  Further, as shown in FIG. 2, a plurality of flat convex portions 13 lower than the height of the side surface portion 12 are formed on the back surface 11 </ b> B of the top plate portion 11. More specifically, the height of the convex portion 13 is lower than the lowest tip portion 12b of the side surface portions 12, and the planar shape of the convex portion 13 is such that the corners of the four corners are rounded. It has a substantially square shape formed in For example, the convex portions 13 are arranged in a lattice shape in an inclined state of approximately 45 ° with respect to the width direction of the top plate portion 11.

  FIG. 6 is a cross-sectional view of the convex portion. As shown in FIG. 6, when the width of the convex portion 13 is w and the height is h, the area occupied by the convex portion 13 on the back surface 11B (in the present embodiment, approximately “width w × width w”). ) Is 20% to 60% of the total area of the back surface 11B. The height h of the convex portion 13 is 0.3 mm to 2.0 mm, and the aspect ratio of the convex portion 13, that is, the ratio of the height h to the width w (h / w) is 0.004. ~ 0.05.

  The top plate portion 11, the side surface portion 12, and the convex portion 13 are formed of the light alloy described above and are integrally formed by injection molding. As the injection molding, for example, a die casting method can be used. Further, the turning shaft 14A and the turning regulating shaft 14B can be provided simultaneously with the injection molding. Specifically, the rotation shaft 14A and the rotation restricting shaft 14B are arranged in advance on a mold used for injection molding and injection molding is performed. The twelve shaft embedding portions 12e can be embedded in a lump.

  As described above, in the vehicle table 1, the top plate portion 11 and the side surface portion 12 are formed of a light alloy that is lightweight and easy to process. Therefore, a flat convex portion 13 lower than the height of the side surface portion 12 can be easily formed on the back surface 11B of the top plate portion 11, and the load resistance of the top plate portion 11 can be sufficiently enhanced by the convex portion 13. . In addition, by adopting the flat convex portion 13, it is possible to secure lightness while maintaining strength comparable to that of a plurality of large ribs provided on a conventional FRP table or the like. Furthermore, the light alloy described above is less susceptible to deterioration than organic materials, and can suppress cracks and the like that are caused by chemical deterioration due to cleaning liquid and aging deterioration. For this reason, the maintainability of the vehicle table 1 is also facilitated.

  Moreover, since the convex-shaped part 13 is integrally formed with the top-plate part 11 by injection molding, the convex-shaped part 13 can be formed in the top-plate part 11 at once. Moreover, the convex-shaped part 13 with a high dimensional accuracy is obtained compared with the press work currently used for manufacture of the table made from FRP conventionally.

  Moreover, since the width w and the height h of the convex portion 13 are within the above-described ranges, the shape of the back surface 11B of the top plate portion 11 is more comfortable to touch while giving sufficient strength as the vehicle table 1. It can be a shape.

  Further, the rotation shaft 14A and the rotation regulating shaft 14B for attaching the vehicle table 1 to the vehicle seat 2 may be formed integrally with the side surface portion 12 by injection molding. In this case, it is not necessary to separately perform the step of forming the opening for embedding the rotation shaft 14A and the rotation restriction shaft 14B in the side surface portion 12, and the manufacturing process can be simplified.

  Further, the convex portion 13 is exposed to the outside. Thereby, the back cover etc. which cover the back surface 11B of the top-plate part 11 are abbreviate | omitted, and a simplification of a manufacturing process and reduction of material cost are achieved. Moreover, even if the convex part 13 is exposed, since the convex part 13 is flat, the touch is good and there is no possibility of giving the user unpleasant feeling.

  Further, the height of the side surface portion 12 is reduced from the proximal end side to the distal end side of the top plate portion 11, while the height of the convex portion 13 is constant. Thereby, the load resistance can be further ensured by reducing the tip side of the table. On the other hand, since the flat convex shape is adopted, the strength of the top plate portion 11 is increased by keeping the height of the convex portion 13 constant (height h) regardless of the height of the side surface portion 12. Can keep.

[Second Embodiment]
Then, the vehicle table which concerns on 2nd Embodiment of this invention is demonstrated. As shown in FIGS. 7 to 10, the vehicle table 21 according to the second embodiment is different from the first embodiment in that it includes a back cover 23 that covers the back surface 11 </ b> B of the top plate part 11.

  More specifically, as shown in FIGS. 7 and 8, in the vehicle table 21, an inward flange portion 22 to be joined to the back cover 23 is provided at the front end portion 12 b and the side portion 12 c of the side surface portion. ing. The flange portion 22 is formed with a predetermined width at a position that is lowered by one step from the tip of the side surface portion 12 by the thickness of the back cover 23. The flange portion 22 is also preferably formed integrally with the side surface portion 12 by injection molding.

  The back cover 23 is made of, for example, the same kind of light alloy as the top plate portion 11 and the side surface portion 12 and has a substantially flat plate shape corresponding to the inner shape of the side surface portion 12 and bent along the surface formed by the flange portion 22. Is formed. As shown in FIGS. 9 and 10, the back cover 23 is fitted into the side surface portion 12 from the back surface side of the vehicle table 21, and the flange portion 22 is formed so as to form a hollow structure with the top plate portion 11. It is joined with. As described above, the flange portion 22 is lowered by one step from the front end of the side surface portion 12 by the thickness of the back cover 23, so that the front end of the side surface portion 12 and the back cover 23 are connected flatly as shown in FIG. Yes.

  The back cover 23 and the flange portion 22 may be joined by, for example, adhesion using an adhesive and mechanical fastening by screwing, but are preferably joined by friction stir welding. For example, by joining by friction stir welding along a line L indicated by a one-dot chain line in FIGS. 7 and 9, the back cover 23 and the flange portion 22 can be firmly joined while suppressing distortion of the back cover 23. . Further, since the screw head that causes the clothes and the like to be caught does not protrude outside, the safety of the vehicle table 21 can be improved.

  As described above, in the vehicular table 21 as well as the vehicular table 1, the top plate portion 11 and the side surface portion 12 are formed of a light alloy that is light and easy to process. Moreover, the flat convex part 13 lower than the height of the side part 12 can be easily formed, and the load resistance of the top plate part 11 can be sufficiently enhanced by the convex part 13. In addition, by adopting the flat convex portion 13, it is possible to secure lightness while maintaining strength comparable to that of a plurality of large ribs provided on a conventional FRP table or the like. Furthermore, the light alloy described above is less susceptible to deterioration than organic materials, and can suppress cracks and the like that are caused by chemical deterioration due to cleaning liquid and aging deterioration. For this reason, the maintainability of the vehicle table 21 is also facilitated. Further, in the vehicle table 21, by providing the back cover 23, the appearance and feel of the vehicle table 21 can be improved. Moreover, the load resistance of the vehicle table 21 can be further ensured by making the interior of the vehicle table 21 have a hollow structure.

  The present invention is not limited to the above embodiment. For example, in the present embodiment, the convex portion having a substantially square planar shape is illustrated, but the shape of the convex portion is not limited to this. For example, the convex portion may have a planar shape that is circular, elliptical, or polygonal other than square. Further, the cross-sectional shape of the convex portion may be a columnar shape, a spindle shape, a hemispherical shape, or the like. In the present embodiment, the vehicle table 1 is described as being attached to the vehicle seat 2 of the railway vehicle. However, the vehicle table according to the present invention may be attached to a vehicle seat other than a railway vehicle such as a bus. It may be attached to a seat such as a ship and an aircraft. Moreover, it is not restricted to a vehicle seat, For example, you may attach to the wall part etc. of a vehicle.

  DESCRIPTION OF SYMBOLS 1,21 ... Vehicle table, 2 ... Vehicle seat (interior member), 11 ... Top plate part, 11A ... Front surface, 11B ... Back surface, 12 ... Side surface part, 13 ... Convex part, 14A ... Turning shaft (shaft member) ), 14B: Rotation restricting shaft (shaft member), 22: Flange, 23 ... Back cover.

Claims (9)

A vehicle table that is rotatably attached to an interior member of a vehicle,
A top plate having a front surface and a back surface;
On the back side of the top plate portion, a side portion erected on the edge of the top plate portion, and
The top plate portion and the side surface portion are formed of a light alloy of an aluminum alloy, a magnesium alloy containing aluminum and manganese, and a magnesium alloy containing aluminum and zinc,
A vehicle table in which a flat convex portion lower than the height of the side surface portion is formed on the back surface of the top plate portion.   The vehicle table according to claim 1, wherein the convex portion is integrally formed with the top plate portion by injection molding.   The vehicle table according to claim 2, wherein a shaft member for attaching the vehicle table to the interior member is formed integrally with the side surface portion by the injection molding.   The vehicle table according to claim 1, wherein the convex portion is exposed to the outside. The side part is provided with an inward flange part,
The vehicle table according to any one of claims 1 to 3, further comprising a back cover that is joined to the flange portion to form a hollow structure with the top plate portion.   The height of the side surface portion decreases from the proximal end side to the distal end side of the top plate portion, while the height of the convex portion is constant. The vehicle table according to the item.   The vehicle table according to any one of claims 1 to 6, wherein an area occupied by the convex portion is 20% to 60% of an area of the entire back surface.   The vehicle table according to claim 1, wherein a height of the convex portion is 0.3 mm to 2.0 mm. The vehicle table according to claim 1, wherein an aspect ratio of the convex portion is 0.004 to 0.05.

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