Fixing structure of cylindrical member, and railway vehicle

Abstract

To provide a fixing structure of a cylindrical member that can prevent a joint from being exposed and does not need any fastening components such as screws to screw down a support member, and a railway vehicle comprising such a fixing structure.SOLUTION: Support members 52A and 52B comprise through-holes 522a and 522b which are penetrated from first surfaces 524A and 524B facing a cylindrical member 51 to opposite-side second surfaces 525A and 525B and into which one end of both ends of the cylindrical member 51 in the axis direction can be inserted. A fixing member 53 comprises: a connection part 532 which can be inserted from the second surfaces 525A and 525B side to the through-holes 522a and 522b and is connected to the cylindrical member 51 inside the through-holes 522a and 522b; and an abutting surface 531a abutting against the second surfaces 525A and 525B as a stopper so that the fixing member 53 does not go through from the second surfaces 525A and 525B side to the first surfaces 524A and 524B side through the through-holes 522a and 522b.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a fixing structure for a cylindrical member for fixing a cylindrical member in a railway vehicle interior and a railway vehicle having such a fixing structure.

Background Art

[0002] Conventionally, for shelves, grab bars, handrails, protection bars, and suspension bars attached in the passenger compartment of a railway vehicle, for example, a cylindrical member (shelf bar in Patent Document 1) is used as disclosed in Patent Document 1. This cylindrical member is supported by a support member (shelf bar support in Patent Document 1) fixed to the wall surface in the passenger compartment. Note that resin parts, aluminum resin laminates, laminated wood, melamine decorative boards, etc. are used for the support member.

[0003] The cylindrical member is fixed to the support member, for example, as shown in FIG. 9. FIG. 9 is a diagram showing an example of a fixing structure of a cylindrical member according to the prior art.

[0004] A connecting member 101 is coupled to an end portion of the cylindrical member 100 in the axial direction (left - right direction in the drawing). The connecting member 101 includes a cylindrical tubular portion 101a into which the cylindrical member 100 can be inserted and a flange portion 101b extending radially from the tubular portion 101a.

[0005] A stainless - steel screw 102 is inserted through the tubular portion 101a from the outer peripheral side, and the screw 102 is screwed into the cylindrical member 100 inserted into the tubular portion 101a. By screwing the screw 102 into the cylindrical member 100 in this way, the cylindrical member 100 and the connecting member 101 are coupled.

[0006] Furthermore, a stainless screw 104 is inserted through the flange portion 101b of the connecting member 101 from the side opposite to the side of the support member 103, and the screw 104 is screwed into the support member 103. Thereby, the connecting member 101 and the support member 103 are coupled. As described above, by coupling the cylindrical member 100 and the connecting member 101 and coupling the connecting member 101 and the support member 103, the cylindrical member 100 is supported by the support member 103 via the connecting member 101. Note that the above-described fixing structure of the cylindrical member 100 is described for one end of both ends in the axial direction of the cylindrical member 100, but the same applies to the other end side.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] When the cylindrical member 100 is fixed to the support member 103 using the screws 102 and 104 as described above, the portions (coupling portions) where the respective members are connected by the screws 102 and 104 are exposed. Therefore, there is a risk that the passenger's luggage or clothes may catch on the heads of the screws 102 and 104. In addition, if the coupling portion is exposed, there is a concern about a decrease in design quality. Furthermore, when resin parts, aluminum resin laminates, laminated wood, melamine decorative boards, etc. are used for the support member 103, since the material strength is lower than the material strength of the screws 102 and 104, cracks may occur in the support member 103 during screwing, resulting in a risk of poor appearance.

[0009] The present invention is for solving the above problems, and an object thereof is to provide a fixing structure of a cylindrical member that prevents the exposure of the coupling portion and does not require screwing fastening parts such as screws to the support member, and a railway vehicle including such a fixing structure.

Means for Solving the Problems

[0010] In order to solve the above problems, the fixing structure of the cylindrical member or the railway vehicle of the present invention has the following configuration.

[0011] (1) In a fixing structure of a cylindrical member for fixing the cylindrical member in a railway vehicle interior, a pair of support members fixed to a wall surface in the interior and supporting the cylindrical member at both axial ends of the cylindrical member, and a fixing member for fixing the cylindrical member to the support member, wherein the support member penetrates from a first surface facing the cylindrical member to a second surface on the opposite side, and has a through-hole into which one end of both axial ends of the cylindrical member can be inserted, and the fixing member is insertable into the through-hole from the side of the second surface and has a connecting portion that connects to the cylindrical member inside the through-hole, and a contact portion that contacts the second surface and serves as a stopper so that the fixing member does not pass through from the side of the second surface to the side of the first surface through the through-hole.

[0012] (2) In the fixing structure of the cylindrical member according to (1), it is preferable that the fixing member is provided with a convex portion on the outer peripheral side of the connecting portion around the axis of the cylindrical member to prevent rotation of the fixing member around the axis by inserting it into the support member from the side of the second surface.

[0013] (3) A railway vehicle characterized by comprising the fixing structure of the cylindrical member according to (1) or (2).

Advantages of the Invention

[0014] According to the above fixing structure of the cylindrical member or the railway vehicle, it is possible to provide a fixing structure of the cylindrical member that prevents the exposure of the coupling portion and does not require fastening components such as screws to be screwed into the support member, and a railway vehicle having such a fixing structure. By preventing the exposure of the coupling portion, it is possible to prevent passengers' luggage and clothes from getting caught on fastening components such as screws. Further, it is possible to prevent the design from being degraded due to the exposure of the coupling portion. Furthermore, since there is no need to screw fastening components such as screws into the support member, it is possible to prevent cracks from occurring in the support member due to the screwing of the fastening components, resulting in poor appearance.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0016] The fixing structure of the cylindrical member and the embodiment of the railway vehicle according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a railway vehicle 1 according to this embodiment. In FIG. 1, the left-right direction is the track direction, and the up-down direction is the height direction. FIG. 2 is a view showing the installation state of a handrail 5 in a passenger compartment 28. FIG. 3(a) is a sectional view taken along line A-A of FIG. 2. FIG. 3(b) is a right side view of FIG. 3(a), and shows a part supporting a cylindrical member 51 in a partial sectional view. FIG. 4 is a view showing a support member 52A constituting the handrail 5. FIG. 5 is a view showing a fixing member 53 constituting the handrail 5.

[0017] (Regarding the railway vehicle) First, the schematic configuration of the railway vehicle 1 according to this embodiment will be described. The railway vehicle 1 is a stainless steel vehicle used, for example, as a commuter vehicle, and as shown in FIG. 1, it has a vehicle body structure 2 and bogies 3 that support the vehicle body structure 2.

[0018] The vehicle body structure 2 includes a frame 21 that forms the floor of the railway vehicle 1, a front wall structure 22 that stands at one end of the frame 21 in the track direction (the left end in FIG. 1) to form the front end of the vehicle body structure 2, a connecting wall structure 23 that stands at the other end of the frame 21 in the track direction (the right end in FIG. 1) to form the connecting part of the vehicle body structure 2, a pair of side structures 24 that stand at both ends of the frame 21 in the sleeper direction to form the side surfaces of the vehicle body structure 2, and a roof structure 25 that is coupled to the upper ends of the front wall structure 22, the connecting wall structure 23, and the upper ends of the pair of side structures 24 to form the roof of the vehicle body structure 2. It is configured to form a hexahedron. Here, the front wall structure 22 side is defined as the front of the railway vehicle 1, and the connecting wall structure 23 side is defined as the rear of the railway vehicle 1.

[0019] In addition, on the side surface of the vehicle body structure 2, there are provided passenger entrances and exits 26 leading to the passenger compartment 28 (see FIG. 2) and windows 27A, 27B, 27C, 27D. The number of passenger entrances and exits 26 and the number of windows 27A, 27B, 27C, 27D are not particularly limited. And, for example, on the rear side of the passenger compartment 28, as shown in FIG. 2, a handrail 5 is arranged along the wall surface 29 on the inner surface side of the side structure 24.

[0020] (Regarding the handrail) Next, the configuration of the handrail 5 will be described. As shown in FIG. 2, the handrail 5 mainly includes two cylindrical members 51, support members 52A, 52B, 52C, and four fixing members 53. The number of cylindrical members 51 is not limited to two. Also, for the support members 52A, 52B, 52C, unless there is a particular need for distinction, the alphabet of the reference numeral is omitted and they are simply referred to as support members 52.

[0021] The cylindrical member 51 is a stainless - steel pipe having openings at both axial ends. Although the dimensions are not particularly limited, in this embodiment, the diameter is about 30 mm and the length is about 1.5 m. Further, the cylindrical member 51 is provided with through - holes 511 for inserting screws 55 (see Fig. 3(b)) at both axial ends thereof. These through - holes 511 are provided so as to penetrate vertically with respect to the axial direction from the outer peripheral surface to the inner peripheral surface of the cylindrical member 51.

[0022] As shown in Fig. 2, the cylindrical member 51 is arranged such that its axial direction coincides with the track direction of the railway vehicle 1. Of the two axial ends, one end (the end on the front side of the railway vehicle 1) is supported by the support member 52A, and the other end (the end on the rear side of the railway vehicle 1) is supported by the support member 52B. Further, the cylindrical member 51 is supported by the support member 52C at a position closer to the support member 52B than the central portion in its axial direction.

[0023] The support member 52 is, for example, a plate material made of resin, an aluminum - resin laminate, laminated wood, a melamine decorative board, etc., and is fixed to the wall surface 29 such that the plate - thickness direction coincides with the track direction of the railway vehicle 1.

[0024] As shown in Figs. 3 and 4, the support member 52 includes a fixing portion 521 for fixing the support member 52 to the wall surface 29 and a support portion 522 for supporting the cylindrical member 51. The fixing portion 521 is positioned so as to stand vertically with respect to the wall surface 29. Further, a through - hole 521a (see Fig. 3(b)) for coupling the mounting metal 54 is penetrating in the plate - thickness direction in the fixing portion 521.

[0025] The mounting metal 54 is an angle formed in an L - shape by a first piece 541 and a second piece 542. The first piece 541 of the mounting metal 54 is coupled to the fixing portion 521 by a bolt 56 inserted through the fixing portion 521, and the second piece 542 is coupled to the wall surface 29 (more specifically, the bone member 241 constituting the side structure 24 on the back side of the wall surface 29) by a bolt 57. Thereby, the support member 52 is fixed to the wall surface 29.

[0026] The support portion 522 extends from the fixing portion 521 toward the ceiling side of the passenger compartment 28 so that the support member 52 is generally L-shaped as a whole. Note that the shape of the support member 52 being generally L-shaped is merely an example and is not limited thereto. In the support portion 522, a through hole 522a penetrates in the plate thickness direction at the tip end portion on the ceiling side, and a through hole 522b penetrates in the plate thickness direction at the end portion on the fixing portion 521 side. The through holes 522a and 522b have diameters that allow the cylindrical member 51 to be inserted therethrough.

[0027] The features of the support member 52 described above are common to the support members 52A, 52B, and 52C. The support members 52A and 52B that support the cylindrical member 51 at both axial ends of the cylindrical member 51 further have the following features. Note that the surfaces of the support members 52A and 52B that face the cylindrical member 51 (the side where the cylindrical member 51 extends) are defined as the first surfaces 524A and 524B, and the surfaces on the opposite sides are defined as the second surfaces 525A and 525B. On the second surfaces 525A and 525B of the support members 52A and 52B, stop holes 523a and 523b for inserting the convex portions 533 of the fixing member 53 described later are drilled toward the first surfaces 524A and 524B. The stop hole 523a is provided near the outer periphery of the through hole 522a, and the stop hole 523b is provided near the outer periphery of the through hole 522b.

[0028] The fixing member 53 is made of, for example, stainless steel and includes a main body portion 531, a connecting portion 532 and a convex portion 533 that stand upright from the main body portion 531, as shown in FIGS. 3(b) and 5. The main body portion 531 is formed in a substantially teardrop-shaped plate form, and one surface is a contact surface 531a (an example of a contact portion) that contacts the second surface 525A of the support member 52A or the second surface 525B of the support member 52B.

[0029] The connecting part 532 is formed in a cylindrical shape and stands upright so that its axial direction is perpendicular to the contact surface 531a. The diameter of the connecting part 532 is sized to be insertable into the opening at the axial end of the cylindrical member 51. Further, the connecting part 532 is provided with a female screw part 532a at a position corresponding to the through hole 511 of the cylindrical member 51 (in this embodiment, it is provided at a position separated from the contact surface 531a by a length approximately half of the thickness of the support member 52, but it may be provided at a position where the head of the screw 55 is covered by the support member 52 when the handrail 5 is assembled). A screw 55 inserted through the through hole 511 can be screwed into the female screw part 532a, and by screwing this screw 55, the fixing member 53 and the cylindrical member 51 can be coupled. The coupling part of the fixing member 53 and the cylindrical member 51 by the screw 55 is located inside the through holes 522a and 522b of the support members 52A and 52B and is not visible from the outside of the handrail 5.

[0030] Also, on the contact surface 531a, adjacent to the connecting part 532, a columnar convex part 533 stands upright. The distance between the axial centers of the connecting part 532 and the convex part 533 corresponds to the distance between the axial centers of the through holes 522a and 522b and the stop holes 523a and 523b in the support members 52A and 52B. The diameter of the convex part 533 is sized to be insertable into the stop holes 523a and 523b, and by inserting the convex part 533 into the stop holes 523a and 523b, rotation of the cylindrical member 51 about its axial center is prevented.

[0031] (Regarding the assembly of the handrail) The assembly process of the handrail 5 having the above configuration will be described with reference to FIGS. 6 - 8. FIGS. 6 - 8 are diagrams for explaining the assembly process of the handrail 5. In FIGS. 6 - 8, for the support members 52A, 52B, and 52C, all the fixing parts 521 are located on the back side and the support parts 522 are located on the front side.

[0032] First, as shown in FIG. 6, insert the two cylindrical members 51 into the through holes 522a and 522b of the support members 52A, 52B, and 52C, respectively. Since the support members 52A and 52B are used to support both axial ends of the cylindrical members 51 and 51, they are positioned outside with the support member 52C interposed therebetween. At this stage, both ends of the cylindrical members 51A and 51B are made to protrude from the second surfaces 525A and 525B of the support members 52A and 52B.

[0033] Next, as shown in FIG. 7, couple the fixing members 53 to both axial ends of each of the two cylindrical members 51. Specifically, insert the connecting portions 532 of the fixing members 53 into the openings at both axial ends of the cylindrical members 51. At this time, align the positions of the through holes 511 of the cylindrical members 51 and the female screw portions 532a of the connecting portions 532 (see FIG. 3(b)). Then, insert the screws 55 through the through holes 511 and thread them into the female screw portions 532a. Since there are two cylindrical members 51 and fixing members 53 are connected to both ends of each, a total of four fixing members 53 are used.

[0034] Next, as shown in FIG. 8, move the support members 52A and 52B to both axial ends of the cylindrical members 51 and bring the contact surfaces 531a of the fixing members 53 into contact with the second surfaces 525A and 525B of the support members 52A and 52B. As a result, the connecting portions between the connecting portions 532 of the fixing members 53 and the cylindrical members 51 enter into the through holes 522a and 522b. Also, at this time, insert the convex portions 533 of the fixing members 53 into the stop holes 523a and 523b of the support members 52A and 52B.

[0035] Then, as shown in Fig. 2, the support members 52A, 52B, and 52C are fixed to the wall surface 29 of the passenger compartment 28 using the mounting brackets 54, and the assembly of the handrail 5 is completed. Although the cylindrical member 51 is not connected to the support members 52A, 52B, and 52C, since the cylindrical member 51 is inserted through the through holes 522a and 522b of the support members 52A, 52B, its movement in the direction perpendicular to the axial direction is restricted. Also, since the contact surfaces 531a of the fixing members 53 contact the second surfaces 525A and 525B of the support members 52A and 52B at both ends of the cylindrical member 51, the movement of the cylindrical member 51 in the axial direction is restricted. In addition, since the convex portions 533 of the fixing members 53 are inserted into the locking holes 523a and 523b of the support members 52A and 52B, the cylindrical member 51 is prevented from rotating about its axis. Further, since the coupling portion between the coupling portion 532 of the fixing member 53 and the cylindrical member 51 is located inside the through holes 522a and 522b, it cannot be visually recognized from the outside of the handrail 5.

[0036] As described above, in the fixing structure of the cylindrical member or the railway vehicle according to the present embodiment, (1) in the fixing structure of the cylindrical member for fixing the cylindrical member 51 in the interior of the railway vehicle 1 (for example, inside the passenger compartment 28), it is fixed to the wall surface 29 in the interior (inside the passenger compartment 28), and includes a pair of support members 52A and 52B that support the cylindrical member 51 at both axial ends of the cylindrical member 51, and a fixing member 53 for fixing the cylindrical member 51 to the support members 52A and 52B. The support members 52A and 52B penetrate from the first surfaces 524A and 524B facing the cylindrical member 51 to the second surfaces 525A and 525B on the opposite side, and are provided with through holes 522a and 522b into which one end of both axial ends of the cylindrical member 51 can be inserted. The fixing member 53 can be inserted into the through holes 522a and 522b from the side of the second surfaces 525A and 525B, and has a coupling portion 532 that couples with the cylindrical member 51 inside the through holes 522a and 522b, and a contact portion (for example, the contact surface 531a) that contacts the second surfaces 525A and 525B to serve as a stopper so that the fixing member 53 does not pass through the through holes 522a and 522b from the side of the second surfaces 525A and 525B to the side of the first surfaces 524A and 524B.

[0037] (2) In the fixing structure of the cylindrical member described in (1), it is preferable that the fixing member 53 is provided with a convex portion 533 for preventing the rotation of the fixing member 53 around the axis by inserting it into the support members 52A and 52B from the sides of the second surfaces 525A and 525B on the outer peripheral side of the connecting portion 532 around the axis of the cylindrical member 51.

[0038] (3) A railway vehicle 1 characterized by comprising the fixing structure of the cylindrical member described in (1) or (2).

[0039] According to the above-described fixing structure of the cylindrical member or the railway vehicle 1, it is possible to provide a fixing structure of a cylindrical member that prevents the exposure of the coupling portion and does not require fastening components such as screws to be screwed into the support members 52A and 52B, and a railway vehicle having such a fixing structure. By preventing the exposure of the coupling portion, it is possible to prevent passengers' luggage and clothes from getting caught on fastening components such as screws. In addition, it is possible to prevent the design from being deteriorated due to the exposure of the coupling portion. Furthermore, since there is no need to screw fastening components such as screws into the support members 52A and 52B, it is possible to prevent cracks from occurring in the support members 52A and 52B due to the screwing of the fastening components, resulting in poor appearance.

[0040] Note that the above embodiment is merely an example and does not limit the present invention in any way. Therefore, the present invention can naturally be variously improved and modified without departing from the gist thereof.

[0041] For example, the handrail 5 is not merely used as a handrail, but may also be used as a hip rest on which passengers can sit or lean by attaching a cushion member to the cylindrical member 51 as disclosed in Japanese Patent Application Laid-Open No. 2023-141762.

[0042] Also, in the present embodiment, one support member 53C is used while being sandwiched between the support members 52A and 52B that support both ends of the cylindrical member 51, but the number of the support members 53C is not limited thereto. A plurality of support members 52C may be used according to the length of the cylindrical member 51.

[0043] Also, the convex portion 533 of the fixing member 53 does not necessarily have to be a columnar protrusion as in the present embodiment. For preventing rotation, any shape may be used as long as it can be inserted into the second surfaces 525A and 525B of the support members 52A and 52B. For example, a wall-like protrusion perpendicular to the contact surface 531a may be provided so as to surround the connecting portion 532. Furthermore, although the main body portion 531 of the fixing member 53 is formed in a substantially teardrop shape, the shape is not limited to this. For example, it may be a quadrangular shape, a circular shape, or other shapes.

[0044] Furthermore, regarding the fixing structure of the cylindrical member of the present invention, in the present embodiment, it has been described as fixing the cylindrical member 51 of the handrail 5, but it is applicable to other members using a cylindrical member such as a luggage rack, a grip bar, a protective bar, a suspension bar, etc.

Explanation of Reference Numerals

[0045] 1 Railway vehicle 28 Passenger compartment 29 Wall surface 51 Cylindrical member 52A Support member 52B Support member 53 Fixing member 524A First surface 524B First surface 525A Second surface 525B Second surface 522a Through hole 522b Through hole 531a Contact surface (an example of a contact portion) 532 Connecting portion

Claims

1. In a fixing structure of a cylindrical member for fixing the cylindrical member inside a railway vehicle, a pair of support members fixed to a wall surface inside the room and supporting the cylindrical member at both axial ends of the cylindrical member; a fixing member for fixing the cylindrical member to the support member; comprising the support member has a through hole that penetrates from a first surface facing the cylindrical member to a second surface on the opposite side and into which one end of both axial ends of the cylindrical member can be inserted; the fixing member has a connecting portion that can be inserted into the through hole from the side of the second surface and is connected to the cylindrical member inside the through hole; and a contact portion that contacts the second surface to serve as a stopper so that the fixing member does not pass through the through hole from the side of the second surface to the side of the first surface; characterized in that it comprises a fixing structure of a cylindrical member.

2. In the fixing structure of the cylindrical member according to Claim 1, the fixing member is provided with a convex portion on the outer peripheral side of the connecting portion around the axis of the cylindrical member to prevent rotation of the fixing member around the axis by inserting it into the support member from the side of the second surface; characterized in that it is a fixing structure of a cylindrical member.

3. characterized in that it comprises the fixing structure of the cylindrical member according to Claim 1 or 2; a railway vehicle.

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