JPH1046959A - Structure for mounting sheet material on barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heighten the mounting strength of a takeup shaft (barrel) to a sheet material in a tonneau cover, curtain, etc., of winding type and ensure the stability of rotation of a barrel to serve as takeup shaft. SOLUTION: A notch in one edge member parallel with a barrel shaft is formed in a hollow barrel 10 having a circular section, and a hollow band 22 having a size alongside the bore of the barrel 10 is formed at the mounting edge 21 of a sheet material 20. The hollow band 22 is inserted inside the barrel 10 through the notch, and a shaft 30 is inserted inside the band 22, and a spring 32 having outward expansiveness by elasticity is installed at the peripheral end of the shaft 30, and the hollow band 22 is pressed to and supported on the inside periphery of the barrel 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a sheet material as a tonneau cover or a curtain to a hollow barrel as a winding shaft in a winding type tonneau cover, curtain or the like.

[0002]

2. Description of the Related Art Conventionally, in a roll-up type tonneau cover, curtain, or the like, one side of a sheet material (tonnow cover, curtain) is attached to the outer periphery of a hollow barrel having a circular cross section, and a shaft is arranged inside the barrel. A winding structure has been adopted in which the sheet material is wound around the barrel by rotating the barrel around the barrel. As a barrel for this type of winding structure, an iron plate is formed into a cylindrical shape by pressing, roll forming, or the like, and a groove is formed on the outer periphery along the longitudinal direction, and a sheet material (tonnow cover, curtain) is formed in the groove. There was an example in which the mounting edge was fixed. For example, as shown in FIG. 3, a mounting edge 54 of a thermoplastic sheet material 53 is bent and inserted into a longitudinal concave groove 52 formed in a barrel 51, and a piano wire or the like having a thickness just entering the groove is further inserted from above. The wire 55 is overlapped, fitted into the groove, and the end of the mounting edge is overlapped in a form wrapping the wire, and a heat treatment, a high frequency welding or the like is applied to the overlapping portion so that the wire does not fall out of the groove. There is an example in which the mounting edge of a sheet material is fixed to a barrel (Jpn.
No. 8935). The problem in this case is that
The processing process is complicated, it is difficult to secure the mounting strength of the sheet material to the barrel, and the deviation of the mounting edge of the sheet material and the barrel from the winding center axis (center axis of the barrel) is large. There was a possibility that the take-up torque was not stable and the take-up was not performed smoothly, or that noise was generated between the barrel and the shaft inserted into the barrel.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the present invention relates to a barrel and sheet material mounting structure which can be processed by simple processing, and has a high mounting strength and a stable rotation of the barrel as a winding shaft. There is provided a structure for attaching a sheet material to a certain barrel.

[0004]

According to the present invention, there is provided a mounting structure for mounting a mounting edge of a sheet material wound around a barrel on a hollow barrel having a circular cross section. A cutout side of one side parallel to is formed, a hollow band having a size along the inner periphery of the barrel is formed at the mounting edge of the sheet material, and this hollow band is inserted into the inside of the barrel through the cutout side of the barrel. A shaft member is inserted into the inside of the hollow belt, and an elastically expandable spring is disposed outwardly on the outer periphery of the end of the shaft to press and support the hollow belt on the inner periphery of the barrel. Depends on the mounting structure.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing a mounting structure of a sheet material to a barrel according to the present invention, and FIG. 2 is a sectional view taken along line AA 'of FIG. In the barrel 10 having a substantially circular cross section, one cutout side 1 parallel to the barrel axis direction is provided.
1 is formed, and the inside of the barrel 1
0a and the outside 10b are in communication. The preferred material for the barrel is a resin pipe extruded or a steel sheet roll-formed (diameter 10).
５０50 mm). The notch side preferably has a width of 5 to 10 mm and is formed along the barrel axial direction by simultaneous processing or post-processing during barrel molding. The sheet material 20 has a hollow band 22 formed at an attachment edge 21 thereof, and the hollow band is disposed inside the barrel through the cutout side 11 of the barrel. Preferred as the sheet material is a resin sheet or a woven sheet having a thickness of 1 to 5 mm, or a laminate thereof. The hollow belt is formed by folding the mounting edge of the sheet material to a required length, welding, or sewing. Is preferred. The size of the hollow band is exactly the size along the inner circumference of the barrel. The shaft 30 to be inserted into the inside of the barrel is preferably a rigid one made of resin or steel, preferably 5 to 40 mm in diameter, and somewhat smaller than the inner circumference of the barrel. A spring 32 is provided on the outer periphery of the end 31 of the shaft. A preferred spring is a helical spring or a leaf spring. Preferably, one end is fixed to the end of the shaft. This spring presses the hollow band in the inner circumferential direction of the barrel, and has an effect of preventing lateral displacement between the hollow band, the barrel and the shaft. (A) of FIG.
(C) shows another embodiment of a spring suitable for the present invention. (A) is an example of a leaf spring in which a bent piece is formed by cutting out the tip of a cylindrical base material, (b) is an example of a helical spring whose peripheral diameter gradually changes, and (c) is a spiral spring. It is an example of a leaf spring.

[0006]

According to the present invention, the barrel and the sheet material can be mounted by simple processing, the mounting strength is strong, and the rotation stability of the barrel as a winding shaft is excellent. Further, since the sheet material is interposed between the barrel and the spring, generation of abnormal noise between the barrel and the spring is prevented.

[Brief description of the drawings]

FIG. 1 shows a structure for attaching a sheet material to a barrel according to the present invention.

FIG. 2 is a sectional view of a barrel.

FIG. 3 shows a conventional mounting structure.

FIG. 4 shows another embodiment of a spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Barrel 11 ... Notch side 20 ... Sheet material 21 ... Mounting edge 22 ... Hollow band 30 ... Shaft 32 ... Spring

Claims (1)

[Claims] 1. A mounting structure for mounting a mounting edge of a sheet material wound around a barrel on a hollow barrel having a circular cross section, wherein the barrel has a cutout side parallel to a barrel axis direction. A hollow band having a size along the inner periphery of the barrel is formed at the mounting edge of the barrel, and this hollow band is inserted into the inside of the barrel through a cutout side of the barrel, and a shaft is inserted into the hollow band, and the shaft is A structure for attaching a sheet material to a barrel, wherein the hollow belt is pressed and supported on the inner periphery of the barrel by disposing an elastically expandable spring outward on the outer periphery of the barrel.