Composite canvas with non-woven fabric sheet, connecting canvas for railway vehicles

Abstract

To prevent creak sometimes generated during traveling of a railway vehicle and noise generated when a railway vehicle travels in a tunnel or an underground passage from being transmitted to a compartment through a coupling hood.SOLUTION: A nonwoven fabric sheet 4 having a rectangular shape is provided for each unwoven fabric sheet storage part 2c provided inside an outer hood cloth 2A and an inner hood cloth 2B and between hood inner bones 8, 8. Clearances 2d, 2d are provided on both sides in a short side direction of the unwoven fabric sheet 4 inside the unwoven fabric sheet storage part 2c.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a composite sheet material with a non-woven fabric sheet used for a coupling beam of a railway vehicle, and a coupling beam for a railway vehicle assembled using this composite sheet material.

Background Art

[0002] Sometimes, the squeaking sound that occurs when a railway vehicle is running, and the running sound that occurs when a railway vehicle runs in a tunnel or an underpass may be heard from inside the passenger compartment through the coupling beam. These sounds are nothing but noise to passengers. In addition, the hot air outdoors in midsummer or the cold air in midwinter may enter the passenger compartment through the coupling beam, which becomes an obstacle to keeping the inside of the vehicle at a comfortable temperature. These problems are solved by closing the door leading to the coupling beam. However, there are times when this door is open, and there are also vehicles without this door. The above problems are considerably solved by improving the coupling beam, and there is a patent application publication for this (Patent Document 1).

[0003] The beam body for railway vehicle coupling according to Patent Document 1 uses a composite sheet material having a two-layer structure in which an outer sheet material and the inner sheet material are overlapped, thick beam outer ribs are installed at the front end and the rear end of the composite sheet material, beam inner ribs are installed at locations provided at a predetermined interval in the front-rear direction of the composite sheet material, and a non-woven fabric sheet is installed at a location positioned between each beam inner rib, and this non-woven fabric sheet attempts to solve the above-described various problems.

[0004] However, as shown in FIG. 2 of the same patent document, this non-woven fabric sheet is arranged in a state of being closely packed without gaps in the space between the outer sheet material and the inner sheet material between each beam inner rib of the composite sheet material. Therefore, when the beam body is folded in a bellows shape, a tensile force is applied to the inner sheet material. This tensile force acts strongly on the inner sheet material because the outer sheet material, the inner sheet material, and the non-woven fabric sheet are folded together as one body. This tensile force is likely to occur not only when the beam body is folded, but also when the vehicle runs on a sharp curve road. When this tensile force is repeated over many years, fatigue is likely to occur in the canvas, especially at the points where the inner and outer canvas layers are joined in a straight line, which can cause cracks or damage to the canvas. (Prior Patent Document)

[0005] [Patent Document 1] Figure 2 of Japanese Patent Publication No. 2002-284004 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The present invention aims to solve the above-mentioned problems by arranging a sound-insulating nonwoven fabric sheet inside the composite canvas with a gap in front of both ends of the shorter side, and by allowing the left and right surfaces of the nonwoven fabric sheet in the shorter direction to slightly slide against the surface of the outer canvas and the surface of the inner canvas in the direction of the gap, and by allowing the gap to deform. [Means for solving the problem]

[0007] A composite canvas fabric with a nonwoven fabric sheet according to the embodiment corresponding to claim 1 is: The composite bellows fabric with a nonwoven fabric sheet used for connecting bellows for railway vehicles has a two-layer structure consisting of an outer bellows fabric and an inner bellows fabric, which is assembled with a cover fabric and a nonwoven fabric sheet to form a roughly flat sheet, and has a general structure that allows it to be assembled into a rectangular tubular shape. The flat composite canvas fabric with nonwoven fabric sheet attached, before assembly, is provided with outer canopy frame insertion sections at the front and rear ends for inserting large diameter outer canopy frames, and further, small diameter inner canopy frame insertion sections are provided at predetermined intervals in the front-to-back direction within the two-layer structure, and nonwoven fabric sheet storage sections are provided between adjacent inner canopy frame insertion sections. Each of the nonwoven fabric sheets having a narrow, elongated shape is housed within the nonwoven fabric sheet housing section with a gap provided in front of the leading edge of the shorter side. When the composite canvas with the nonwoven fabric sheet is folded in a shortening direction, the nonwoven fabric sheet is able to move in the direction of the gap with some compression, and the surface of the composite canvas with the nonwoven fabric sheet on which the nonwoven fabric sheet is located is configured to bend with a U-shaped or substantially inverted Ω-shaped curved surface.

[0008] The composite canvas fabric with a nonwoven fabric sheet according to the embodiment of claim 2 further includes the following configuration: Both the inner and outer canvas fabrics are made of tarpaulin with a thickness of approximately 0.8 mm, in which both sides of a synthetic fiber woven fabric are covered with a soft polyvinyl chloride resin layer. Each of the aforementioned canopy frame insertion sections and nonwoven fabric sheet storage sections are separated by a joint where the inner canopy fabric and the outer canopy fabric are joined in parallel in a narrow, straight direction.

[0009] A composite canvas fabric with a nonwoven fabric sheet according to the embodiment of claim 3 has the following additional configuration in any of the above configurations: The aforementioned nonwoven fabric sheet is made of flame-retardant polyester fiber yarn, 1 m 2 The material used is a strip-shaped material with a weight of approximately 500g per piece, a thickness of approximately 3mm, and a short width and long length.

[0010] In the composite canvas fabric with a nonwoven fabric sheet according to the embodiment of claim 4, in any of the above configurations, the nonwoven fabric sheet is fixed at a point that divides the short width direction in two by a hook provided on the upper part of the composite canvas fabric for attaching a cover, and by a grommet (eyelet fitting) for drainage and waste discharge attached to the bottom surface when used as a connecting bellows for the railway vehicle.

[0011] The embodiment corresponding to claim 5 has a configuration that is close to the completed configuration of a connecting bellows for railway vehicles. In this configuration, the outer bellows frame is inserted into both ends of the composite bellows fabric with a nonwoven sheet as described in any of claims 1 to 5, and the inner bellows frame is inserted at predetermined intervals in the front-rear direction of the composite bellows fabric with a nonwoven sheet, and assembled by being deformed into a rectangular shape using a dedicated large bending machine. [Effects of the Invention]

[0012] According to the composite canvas fabric with a nonwoven fabric sheet of the present invention, when the nonwoven fabric sheet is folded in a direction that shortens it in the length direction, the nonwoven fabric sheet moves in the left-right direction where the gap exists with some compression. Therefore, the nonwoven fabric sheet does not become tightly packed within the nonwoven fabric sheet housing, reducing the tensile force applied to the inner fabric. Whether or not the nonwoven fabric sheet is compressible is greatly influenced by the density of the nonwoven fabric sheet. The nonwoven fabric sheet has a density that maintains high sound insulation and sound-dampening effects, high heat insulation effects, etc. Reducing the tensile force applied to the nonwoven fabric sheet improves the durability of the inner fabric, and consequently the durability of the composite canvas with the nonwoven fabric sheet, significantly reducing the occurrence of damage and tearing. The composite canvas fabric with a nonwoven fabric sheet according to the present invention does not fold the surface with the nonwoven fabric sheet into a sharp V-shape like conventional connected canvas fabrics, but rather folds into a U-shape or a roughly Omega-shape with a large arc inward. Therefore, damage and tearing of the canvas fabric that occurred due to the sharp folding in conventional methods are greatly reduced. [Modes for carrying out the invention]

[0013] Preferred embodiments of the composite canvas fabric with nonwoven sheet and the connecting canvas for railway vehicles according to the present invention will be described in detail with reference to the following drawings. [Brief explanation of the drawing]

[0014] [Figure 1] (a) is a perspective view showing the inner canvas of a composite canvas fabric with a nonwoven sheet facing upwards, and (b) is a close-up view of a portion of the end face of the same fabric. [Figure 2] (a) is a perspective view showing the outer canvas of the composite canvas with a nonwoven sheet facing upwards, and (b) is a table showing the constituent fabrics of the composite canvas with a nonwoven sheet in a tree structure. [Figure 3] A perspective view showing the various fabrics used in composite canvas fabric with a nonwoven sheet. [Figure 4](a) is an enlarged cross-sectional view of a side portion showing the state where the non-woven fabric sheet is hooked, and (b) is an enlarged cross-sectional view of a side portion showing the state where the non-woven fabric sheet is fastened with a dove-shaped fitting (hatome). [Figure 5] Perspective view showing the state during the insertion of the outer frame bone and the inner frame bone into the composite frame material with a non-woven fabric sheet. [Figure 6] Front view of the coupling frame for railway vehicles using the composite frame material with a non-woven fabric sheet. The upper part is shown at the position where the kise cloth is present to clarify the position of the kise cloth. [Figure 7] Side view showing the composite frame material with a non-woven fabric sheet in an extended state. [Figure 8] Cross-sectional view taken along the line A - A in FIG. 6. [Figure 9] Side view showing the coupling frame for railway vehicles using the composite frame material with a non-woven fabric sheet in a shortened state. [Figure 10] (a) is an enlarged side cross-sectional view of a part of the coupling frame for railway vehicles in an extended state, and (b) is an enlarged side cross-sectional view of a part of the same in a shortened state. [Figure 11] (a) is an enlarged cross-sectional view showing a part of FIG. 10(a), and (b) is an enlarged cross-sectional view showing a part of FIG. 10(b). [Figure 12] Graph showing the results of the acoustic transmission loss test of the composite frame material with a non-woven fabric sheet.

Example

[0015] 〔Overview〕 - Composite frame material 1 with a non-woven fabric sheet - The composite frame material 1 with a non-woven fabric sheet shown in FIGS. 1(a) and 2(a) is mainly composed of a combination of a composite frame material 2, a kise cloth 3, and non-woven fabric sheets 4, 4···. These figures are shown in a flat state before the composite frame material 1 with a non-woven fabric sheet is assembled into the shape of a coupling frame for railway vehicles. The kise cloth 3 is attached so as to overlap the surface corresponding to the upper part of the side from the roof of the outer frame material 2A when the composite frame material 1 with a non-woven fabric sheet is assembled into a rectangular shape. Figures 1(b), 2(b), and 3 clearly show the combination of each fabric and the assembly structure used in the composite canvas fabric 1 with nonwoven sheet.

[0016] -Composite hood 2- As shown in Figures 1(a)(b) to 3, the composite canvas fabric 2 has a two-layer structure in which the outer canvas fabric 2A and the inner canvas fabric 2B are superimposed. At both ends of the composite canvas fabric 2, outer canvas insertion frame sections 2a, 2a are provided by folding and joining. Internal frame insertion sections 2b, 2b... are provided at predetermined intervals in the front-to-back direction on the inside of the composite canvas fabric 2.

[0017] The composite canvas fabric 1 with a nonwoven fabric sheet has a double-layered structure, and nonwoven fabric sheet storage sections 2c, 2c... are provided on the inside between the outer frame insertion section 2a and the inner frame insertion section 2b, and on the inside between adjacent inner frame insertion sections 2b, 2b.

[0018] In the composite canvas fabric 2 with a nonwoven fabric sheet, nonwoven fabric sheet storage sections 2c, 2c... are provided on the inside between adjacent canvas frame insertion sections 2b, 2b on the inside where the outer canvas fabric 2A and the inner canvas fabric 2B are overlapped. Nonwoven fabric sheets 4, 4, 4 are housed within the nonwoven fabric sheet housing sections 2c, 2c, 4.

[0019] ―Non-woven fabric sheet 4- The nonwoven fabric sheet 4 is made of a material that has soundproofing and heat insulating properties. Specifically, for example, 1m 2 One example is a long, narrow strip made from flame-retardant polyester fiber, weighing approximately 500g per piece and with a thickness of approximately 3mm. The nonwoven fabric sheets 4,4... are arranged in parallel with a predetermined interval in the front-to-back direction (which is the lateral direction in Figure 3), as shown in Figure 3. The predetermined interval here is the interval between the internal bone insertion sections 2b,2b.

[0020] As shown in Figures 1(a), 2(a), and 4(a), the nonwoven fabric sheet 4 is fixed at the center, which divides the short width direction in two, by a hook 5 that attaches the cover fabric 3 to the canvas. Furthermore, as shown in Figures 1(a), 2(a), and 4(b), the nonwoven fabric sheet 4 is fixed in the middle, which divides the short width direction in two, by eyelets (grommets) 6 that are attached to the bottom of the canopy during canopy formation. The nonwoven fabric sheets 4,4... are housed within the nonwoven fabric sheet housing sections 2c,2c... so that no lateral displacement occurs due to the aforementioned fixing methods.

[0021] -Railway vehicle connecting bellows 10- Figures 6 to 9 show a railway vehicle connecting bellows 10 using a composite bellows fabric 2 with a nonwoven fabric sheet. The railway vehicle coupling bellows 10 has a cover fabric attached to the wide central surface of the outer bellows fabric 2A by snap fasteners. The railway vehicle connecting bellows 10 have outer bellows frames 7,7 inserted at the front and rear ends, and inner bellows frames 8,8... inserted at predetermined intervals in the front-to-back length direction. After this, they are folded into the rectangular shape shown in Figure 6 using a dedicated large bending machine. The railway vehicle connecting bellows 10 can be folded from the extended state shown in Figures 7 and 10(a) to the shortened shape shown in Figures 9 and 10(b).

[0022] Referring to Figures 1(a) and 1(b), as shown in Figure 10(a), a nonwoven fabric sheet storage section 2c is provided between the two layers of outer fabric 2A and inner fabric 2B. The nonwoven fabric sheet 4 is stored in the nonwoven fabric sheet storage section 2c in a state where displacement in the short-width direction is prevented. This prevention of displacement is achieved by fastening with the aforementioned hook 5 and by fastening with eyelets (eyelet fittings 6).

[0023] The nonwoven fabric sheet 4 is housed in the nonwoven fabric sheet housing section 2c with gaps 2d, 2d on both sides. The nonwoven fabric sheet 4 has two sides, one on the left and one on the right, which divide the short width direction in half, and these sides are slightly movable relative to the outer fabric 2A and the inner fabric 2B in the direction where the gaps 2d, 2d are located. This movement occurs when the railway vehicle connecting bellows 10 is folded in the shortening direction, as shown in Figures 9 and 10(b), and the inner bellows fabric 2B is pulled, slightly compressing the nonwoven fabric sheet 4, and bending into a U-shape.

[0024] More specifically, the nonwoven fabric sheet 4 bends from the shape shown in Figure 11(a) to the shape shown in Figure 11(b). This bending compresses the nonwoven fabric sheet 4 slightly, stretching it in the direction of the gaps 2d, 2d. As a result, the tensile force applied to the inner canvas fabric 4B is reduced, and the portion of the canvas fabric where the nonwoven fabric sheet 4 is located bends into a U-shaped curved surface. In other words, the bending occurs without applying excessive tension to the inner canvas fabric 4B. Furthermore, when this bending occurs, a portion of the outer fabric 2A lifts up. This lifting is possible because the nonwoven sheet 4 and the outer fabric 2A are in a movable state and are not joined to each other. The nonwoven sheet 4 and the inner fabric 2B are similarly in a movable state. When the nonwoven sheet 4 is strongly pulled by the inner fabric 2B, the nonwoven sheet 4 is elastically pushed out (extended) in the direction where the gaps 2d, 2d are located. As a result, the risk of the inner fabric 2B being damaged or torn is greatly reduced.

[0025] Figure 12 is a graph showing the test results of sound transmission loss for composite canvas fabric with nonwoven fabric sheets. No. 1 in this graph shows the test results for a single fabric sample without aramid; No. 2 shows the test results for a sample consisting of two fabrics, one with aramid and one without; No. 3 shows the test results for a sample with sound-insulating material sandwiched between two aramid-free fabrics; and No. 4 shows the test results for a sample with sound-insulating material sandwiched between an aramid-containing fabric and a non-aramid fabric. This test was conducted by the Osaka Prefectural Industrial Technology Center. As shown in this graph, it was confirmed that the composite canvas fabric with nonwoven fabric sheets, which acts as sound-insulating material, has high sound-insulating and sound-dampening effects. Industrial application fields

[0026] The present invention is used in the field of connecting bellows for railway vehicles. [Explanation of Symbols]

[0027] 1. Composite canvas with nonwoven fabric sheet 2 Composite canopy 2A Outside canopy 2B Inner canvas Nonwoven fabric sheet storage section 2c 3. Kise cloth 4. Non-woven fabric sheet (soundproofing material)

Claims

1. The composite bellows fabric with a nonwoven fabric sheet used for connecting bellows for railway vehicles has a two-layer structure consisting of an outer bellows fabric and an inner bellows fabric, and is assembled with a cover fabric and a nonwoven fabric sheet to form a roughly flat sheet, and has a general structure that allows it to be assembled into a rectangular tubular shape. The flat composite canvas fabric with nonwoven fabric sheet attached, before assembly, is provided with outer canopy frame insertion sections at the front and rear ends for inserting large diameter outer canopy frames, and further, small diameter inner canopy frame insertion sections are provided at predetermined intervals in the front-to-back direction within the two-layer structure, and nonwoven fabric sheet storage sections are provided between adjacent inner canopy frame insertion sections within the two-layer structure. Each of the nonwoven fabric sheets having a narrow, elongated shape is housed within the nonwoven fabric sheet housing section with gaps provided in front of both ends of the shorter side, and in a manner that allows for free movement in the direction in which each gap is located. When the composite canvas with the nonwoven fabric sheet is folded in a shortening direction, the nonwoven fabric sheet is stretched in the direction of the gap with some compression, and, The composite canvas fabric with a nonwoven fabric sheet, wherein the bent portion of the surface on which the nonwoven fabric sheet is located is configured to bend with a U-shaped or approximately Ω-shaped curved surface having a large arc in the inward direction, while lifting up on some surfaces on the left and right sides of the bent portion.

2. Both the inner and outer canvas fabrics are made of tarpaulin with a thickness of approximately 0.8 mm, in which a soft polyvinyl chloride resin layer is coated on both sides of a synthetic fiber woven fabric. Each of the aforementioned canopy frame insertion sections and nonwoven fabric sheet storage sections are separated by multiple joints formed by the joining of the inner canopy fabric and the outer canopy fabric in parallel in a narrow, linear direction. The composite canvas fabric with nonwoven fabric sheets according to claim 1, wherein the nonwoven fabric sheets are housed in each of the partitioned nonwoven fabric sheet housing sections in a movable state such that the nonwoven fabric sheets and the outer fabric are not joined to each other, and the nonwoven fabric sheets and the inner fabric are not joined to each other.

3. The nonwoven fabric sheet is made of a strip-shaped, compressible elastic material having a short width and a long length, in which flame-retardant polyester fiber yarns are laminated in a predetermined weight and thickness having sound-insulating properties, and when the nonwoven fabric sheet is strongly pulled by the inner fabric, the nonwoven fabric sheet is elastically deformed into a shape that extends by being pushed out with elastic force in both directions where the gaps are located, as described in claim 1.

4. The nonwoven fabric sheet is fixed at a point that divides the short width direction in two by a hook provided on the upper part of the composite canvas fabric for attaching a cover, and a grommet fitting for drainage and waste discharge attached to the bottom surface when used as a connecting bellows for the railway vehicle, as described in claim 1.

5. A connecting bellows for railway vehicles, wherein the outer bellows are inserted into both ends of the composite bellows fabric with a nonwoven fabric sheet as described in claim 1, and the inner bellows are inserted at predetermined intervals in the front-to-back direction of the composite bellows fabric with a nonwoven fabric sheet, and assembled by being deformed into a rectangular shape using a dedicated large bending machine.

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