Sewing thread structure of folding shed windshield shed cloth

Abstract

In order to solve the problems that in an existing railway vehicle folding shed, a sewing thread of a windshield shed cloth floats on the surface of the shed cloth, so that the sealing performance and the strength of a folding shed windshield are reduced, and an aluminum profile cracks after being flared and crimped, the utility model provides a sewing thread structure of a folding shed windshield shed cloth, which comprises a composite layer of shed cloth, a sewing thread and a groove, the shed cloth of the composite layer sequentially comprises a surface glue layer, a fabric layer, a bonding layer, a fabric layer and a surface glue layer in the thickness direction. Two grooves are formed in the surface of the surface glue layer on the outer side of the two layers of shed cloth at the lap joint of each annular shed cloth assembly, the grooves are formed in the width direction of each annular shed cloth assembly, and the positions of the grooves in the two layers of shed cloth correspond to each other; the sewing thread is arranged in the groove; the utility model has the advantages of simple structure and convenience in processing, solves the problem that the sewing thread of the vestibule windshield is broken by abrasion, and prolongs the service life of the windshield; the cracking risk caused by the flaring width of the aluminum frame is reduced, potential safety hazards are reduced, and meanwhile the maintenance cost and maintenance difficulty of the bellows windshield are reduced.

Description

Technical Field

[0001] This utility model relates to rail vehicles, specifically to a seam structure for the inner windshield fabric of a rail vehicle canopy. Background Technology

[0002] Canopy fabric is the main raw material for making folding canopies and windshields for rail vehicles, serving to protect against wind, rain, and snow. Folding canopies and windshields are made by sewing single loops of canopy fabric together, inevitably resulting in overlapping seams. Current sewing techniques involve directly sewing the fabric onto the surface of the overlapping seams, with the sewing thread floating on the surface of the fabric. Figure 1 As shown. Its disadvantages are: during train operation, there is continuous friction between the rings of the canopy, and the sewing thread also rubs against the canopy, causing the sewing thread to break quickly. Once the sewing thread breaks, the sealing and strength of the folding canopy will decrease, and later repairs will be difficult. Furthermore, this sewing structure increases the overall thickness of the multi-ring canopy, making it impossible to insert the canopy into the aluminum frame. Subsequent processes require flaring the aluminum profile, and there is a risk of cracking during the pressing process after flaring. Summary of the Invention

[0003] To address the aforementioned issues, this utility model provides a stitching structure for a folding tent windshield that is simple in structure, convenient and practical, safe and reliable in design, and can improve the service life of the windshield, reduce the risk of folding tent maintenance costs, and simplify maintenance.

[0004] The stitching structure of the folding tent / windshield fabric of this utility model includes a composite layer of tent fabric, sewing thread, and grooves; the composite layer of tent fabric sequentially includes a first adhesive layer, a first fabric layer, an adhesive layer, a second fabric layer, and a second adhesive layer along the thickness direction; the outer surface of the adhesive layer of the two layers of tent fabric forming the overlap point of each ring of tent fabric is provided with two grooves, the grooves are along the width direction of each ring of tent fabric, and the grooves on the two layers of tent fabric correspond to each other; the sewing thread is placed in the groove; the depth of the groove is less than the diameter of the sewing thread.

[0005] Furthermore, the groove is a hot-pressed groove. A hot press is used to press the groove into the adhesive layer of the canopy, a process similar to the secondary vulcanization of rubber, which will not damage the internal fabric of the canopy or affect the strength of the canopy itself.

[0006] The groove depth is 0.5mm-0.8mm, and the diameter of the sewing thread when taut is 0.8mm. The sewing thread sinks to a depth of 0.5mm-0.8mm, so even if it is slightly exposed, it will rub against the fabric but will not completely break the sewing thread. After the ring is sewn together, the thickness at the overlap of two adjacent rings is reduced by 2mm, which reduces the width of the aluminum frame flare and lowers the risk of cracking.

[0007] Furthermore, the groove width is 2mm.

[0008] Furthermore, the center-to-center distance between the two grooves is 10mm, and the center of the groove near the edge of the canopy is 5mm from the edge of the canopy.

[0009] The stitching structure of the folding awning windshield fabric described in this utility model is simple in structure and easy to process. The groove itself can be used as a reference line, so the sewing worker does not need to draw a separate reference line. The sewing is carried out according to the position of the groove, and the sewing thread can be sunk into the groove after sewing. This solves the problem of the sewing thread breaking after the folding awning windshield is sewn together. After the ring sewing is completed, the service life of the windshield is improved. The thickness at the overlap of two adjacent rings is reduced, the width of the aluminum frame flare is reduced, the risk of cracking is reduced, and safety hazards are reduced. At the same time, the maintenance cost and difficulty of the folding awning windshield are reduced. Attached Figure Description

[0010] Figure 1 This is a diagram of the stitching structure of the overlapping section of the folding canopy windshield of an existing rail vehicle.

[0011] Figure 2 This is a schematic diagram of the stitching structure of the folded windbreak fabric of this utility model at the folding ring position.

[0012] Figure 3 yes Figure 2 Side view.

[0013] Figure 4 This is a structural diagram of the stitching structure of the folding windbreak fabric described in this utility model.

[0014] Figure 5 yes Figure 4 The pressing diagram of the pressing groove described in the figure.

[0015] The diagram is marked as follows:

[0016] 1-Overlapping part; 2-Sewing thread; 3-Shell cloth; 4-Groove; 5-Hot pressing mold; 6-Groove punch. Detailed Implementation

[0017] The following is combined with Figures 2 to 5 The stitching structure of the folding windbreak fabric described in this utility model will be described in detail.

[0018] like Figure 2 As shown, the stitching structure of the folding windshield fabric of this utility model is located on the fabric composition of each ring of the folding windshield. Each ring of fabric composition has 8 overlapping parts 1, each overlapping part has 2 stitches, for a total of 16 stitches. Figure 3 It is composed of multiple rings of folding shed fabric, with the overlapping parts of adjacent shed fabric rings staggered from each other, such as... Figure 2 and Figure 3 As shown.

[0019] like Figure 4As shown, the stitching structure of the folding tent / windshield fabric of this utility model includes a composite layer of tent fabric 3, sewing thread 2, and grooves 4; the composite layer of tent fabric 3 includes, in sequence along the thickness direction, a first adhesive layer, a first fabric layer, an adhesive layer, a second fabric layer, and a second adhesive layer; the outer surface of the adhesive layer of the two layers of tent fabric 3 forming the overlap point of each ring of tent fabric is provided with two grooves 4, the grooves 4 are along the width direction of each ring of tent fabric, and the positions of the grooves 4 on the two layers of tent fabric 3 correspond to each other.

[0020] like Figure 5 As shown, the groove 4 is a hot-pressed groove. The hot-pressing mold 5 presses two grooves 4 into the fabric 3. The hot-pressing mold 5 is provided with two groove pressing punches 6. The center of the groove 4 near the edge of the fabric 3 is 5mm away from the edge of the fabric. The center distance between the two grooves 4 is 10mm. The hot-pressing mold 5 presses out the grooves 4, which is similar to the secondary vulcanization of rubber. It will not damage the internal fabric of the fabric and will not affect the strength of the fabric itself.

[0021] The groove 4 has a depth of 0.5mm-0.8mm, a groove width of 2mm, and a diameter of 0.8mm when the sewing thread is taut. The sewing thread 2 is placed in the groove 4, and the sewing thread 2 sinks to a depth of 0.5mm-0.8mm. Even if it is slightly exposed, it will rub against the fabric, but it will not completely break the sewing thread. After the ring is sewn, the thickness at the overlap of the two adjacent rings is reduced by 2mm, which reduces the width of the aluminum frame flare and reduces the risk of cracking.

[0022] The stitching structure of the folding awning windshield fabric described in this utility model is simple in structure and easy to process. The groove itself can be used as a reference line, so the sewing worker does not need to draw a separate reference line. The sewing is carried out according to the position of the groove, and the sewing thread can be sunk into the groove after sewing. This solves the problem of the sewing thread breaking after the folding awning windshield is sewn together. After the ring sewing is completed, the service life of the windshield is improved. The thickness at the overlap of two adjacent rings is reduced, the width of the aluminum frame flare is reduced, the risk of cracking is reduced, and safety hazards are reduced. At the same time, the maintenance cost and difficulty of the folding awning windshield are reduced.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A stitching structure for a folding awning / windbreak fabric, characterized in that: The device includes a composite layer of fabric, sewing thread, and grooves. The composite layer of fabric includes, in sequence along its thickness direction, a first adhesive layer, a first fabric layer, an adhesive layer, a second fabric layer, and a second adhesive layer. The outer surface of the adhesive layer of each layer of fabric forming an overlap point is provided with two grooves, which are located along the width direction of each layer of fabric. The grooves on the two layers of fabric correspond to each other. The sewing thread is placed in the groove.

2. The stitching structure of the folding canopy windbreak fabric according to claim 1, characterized in that: The groove is a hot-pressed groove.

3. The stitching structure of the folding windbreak fabric according to claim 1, characterized in that: The groove depth is 0.5mm to 0.8mm, and the diameter of the sewing thread in the taut state is 0.8mm.

4. The stitching structure of the folding windbreak fabric according to claim 2, characterized in that: The groove depth is 0.5mm to 0.8mm, and the diameter of the sewing thread in the taut state is 0.8mm.

5. The stitching structure of the folding windbreak fabric according to any one of claims 1 to 4, characterized in that: The groove width is 2mm.

6. The stitching structure of the folding canopy windbreak fabric according to any one of claims 1 to 4, characterized in that: The center-to-center distance between the two grooves is 10mm, and the center of the groove near the edge of the canopy is 5mm from the edge of the canopy.

7. The stitching structure of the folding canopy windbreak fabric according to claim 5, characterized in that: The center-to-center distance between the two grooves is 10mm, and the center of the groove near the edge of the canopy is 5mm from the edge of the canopy.

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