JP3047456U - Bellows made of round cloth. - Google Patents

Abstract

(57) [Summary] [Purpose] A tubular part of a joint made of a cover cloth (hereinafter referred to as a cover) 1 coated with a thermoplastic resin and a cover cloth 1 provided in an opening of a round cloth bellows formed by a metal ring. The mouth is formed by heat welding using a welder method to form a joint with excellent confidentiality and adhesive strength. [Structure] Cut a cover cloth into a square shape, overlap the both ends in the width direction so as to wrap the base metal, press and heat it with a presser base from above, weld it to form a cylindrical body, and form an inner part equal to its outer diameter. Inserted into a hollow cylindrical body having a diameter, a part of the cylindrical body is positioned outside the hollow cylindrical body, and the cylindrical body positioned outside the cylindrical body is directed outward along the outer peripheral surface of the cylindrical body. Fold it back, and form the hat-shaped body by pressing and heating the back-formed body surface to the center of the disc-shaped body with the folded-back part formed body cut out of the cover cloth on the base plate by pressing and heating. The round bellows made of a round cloth, which is connected to the opening of the bellows by sewing.

Description

[Detailed description of the invention]

BACKGROUND ART [0002] The bellows made of a round cloth having a function of elasticity are widely used in various industries. Of the failure phenomena generally occurring in the round cloth bellows, there are many cases of failure phenomena due to factors such as the shape of the joints and processing. In particular, when subjected to repeated expansion and contraction, the joints of the joints are repeatedly subjected to stress, causing breakage.

In the conventional method of processing a joint part of a round cloth bellows, in FIG. 1, a procedure is performed in a direction indicated by a mark → in a direction indicated by a mark. It is cut to have a length L1, and both ends a in the width direction are overlapped and joined at an overlapped joint b with an adhesive, and sewn like a perforation c at the overlapped joint b to form a cylindrical body 2. As shown in FIG. 2, a plurality of cuts d are provided in one end of the cylindrical body 2 in the order of the mark as shown in FIG. A donut-shaped body 3 in which a cloth 1 has an inner shin processed to be equal to the outer shape of the cylindrical body 2 is inserted from above in the figure, and a space between the donut-shaped body 3 and the petal-shaped forming portion e is adhered to the cylindrical body by an adhesive. The hat-shaped body 4 is formed by sewing the adjacent surface like a perforation f. Next, as shown in FIG. 3, the hat-shaped body 4 is temporarily fixed to the opening g of the round-shaped cloth bellows 5 with an adhesive so as to face each other, and as shown in FIG. 4, the opening of the round-shaped cloth bellows 5 is formed. A conventional general method is to form a round-shaped cloth bellows 6 provided with a joint portion by sewing a perforation h at a portion close to the outer peripheral surface of the belt. In the conventional method, when the cut d is provided in the tubular body in the procedure shown in FIG. 2 and the petal-shaped forming portion e is provided, there is a large variation due to the accuracy of the cut depth, the cut pitch, the lap joint and the like. However, the inner diameter of the donut to be inserted is difficult to match with the inner diameter of the donut-shaped body, so that a gap or the like is apt to be generated.

[0003] In order to solve the above problems, the present invention provides an excellent joint of a round-shaped cloth bellows by easily forming a perfect hat-like body by a heat welding method in processing the hat-like body. And devised a method to make it. The specific contents will be described below with reference to the drawings. In FIG. 5, the cover cloth 1 is cut (preferably cut in the bias direction) so as to have a width W2 and a length L2 in the direction of the mark, and the base metal 7 is wrapped. The overlapped joint A is welded by pressing and heating with a presser base 8 from above to form a cylindrical body 9 having a welded portion B, as shown in FIG. The cylindrical body 9 is inserted into a cylindrical body 10 having an inner diameter substantially equal to the outer shape of the cylindrical body, and a part of the cylindrical body 9 is formed so as to be located outside the cylindrical body 10. Then, the cylindrical body 9 located at the position (1) is folded outward to obtain a folded portion forming body 11 provided with a folded portion 9 '. Next, in FIG. 7, the folded portion forming body 11 is positioned so as to face substantially the center of the disc-shaped body 12 obtained by cutting the cover cloth 1 on the base plate 13, and the upper surface of the cylindrical body in FIG. Although part C is not shown, it is welded by pressing and heating using a welding method with a holding base. Next, as shown in FIG. 9, the excess cover cloth D at the base of the welded tubular body 9 is removed to obtain a hat-like body 14 in the order indicated by the arrow mark. Next, in FIG. 10, a vent E corresponding to the inner diameter of the cylindrical body welded from the back side of the hat-like body is provided. As shown in FIG. 11, the hat-shaped body 14 is connected to the opening of the bellows 15 made of a round cloth by sewing at a perforation F in FIG. The mouth G of the joint, which was liable to cause the cracks, can be completely hermetically sealed by welding, so that a high-quality bellows 16 made of a round cloth with a joint could be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a procedure for processing a conventional cylindrical body.

FIG. 2 is a perspective view showing a procedure for processing a conventional hat-shaped body.

FIG. 3 is a perspective view in which a conventional hat-shaped body is provided facing an opening of a round cloth bellows.

FIG. 4 is a perspective view showing that a conventional hat-shaped body is fixed to the opening of the bellows by sewing.

FIG. 5 is a perspective view showing a procedure for processing the cylindrical body of the present invention.

FIG. 6 is a perspective view showing a procedure for inserting the tubular body of the present invention into the cylindrical body, folding the tubular body located outside the cylindrical body, and forming a folded portion forming body.

FIG. 7 is a perspective view showing a state in which the folded portion forming body of the present invention faces the disk-shaped body.

FIG. 8 is a perspective view showing a state in which the folded portion forming body of the present invention is welded to a disc-shaped body.

FIG. 9 is a perspective view showing a procedure for forming a hat-like body by removing an excess cover cloth at the base of the welded tubular body of the present invention.

FIG. 10 is a perspective view showing that a vent is provided in a portion of the hat-like body facing the inner surface of the tubular body of the present invention.

FIG. 11 is a perspective view showing a state in which the hat-shaped body is opposed to the opening of the round cloth bellows of the present invention.

FIG. 12 is a perspective view showing that the hat-shaped body is opposed to the opening of the round cloth bellows of the present invention, and is fixed by sewing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover cloth 2 Cylindrical body 3 Donut-shaped body 4 Hat-like body 5 Round-shaped cloth bellows 6 Round-shaped cloth bellows provided with joints 7 Base metal 8 Holding base 9 Cylindrical body 9 'Folded part 10 Cylindrical body 11 Folded part Formed body 12 Disc-shaped body with cut-out cover cloth 13 Base plate 14 Hat-shaped body 15 Bellow made of round cloth L2 Cut length of cover cloth W2 Cut width of cover cloth a Both ends mating part b Lap joint part c Perforation d Cut e Petal-shaped forming part f Perforation g Round cloth opening of bellows h Perforation L2 Cutting length of cover cloth W2 Cutting width of cover cloth A Overlap joint part B Welding part C Upper surface part of cylindrical body D Excess cover cloth E Vents F Perforations G Joint mouth

[Procedure amendment]

[Submission date] October 17, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (1)

[Utility model registration claims] 1. A round cloth bellows formed by a cover cloth (hereinafter referred to as cover cloth) 1 coated with a thermoplastic resin and a metal ring, the cover cloth 1 is cut into a width W2 and a length L2. Then, the base metal 7 is wrapped around, and both ends in the width direction are overlapped with each other and welded by pressing and heating with a holding base 8 of a welder from above to form a cylindrical body 9 having a welded portion B. The cylindrical body 9 is inserted into a hollow cylindrical body (hereinafter referred to as a cylindrical body) 10 having an inner diameter substantially equal to the outer diameter of the cylindrical body,
A part of the cylindrical body 9 is located outside the cylindrical body 10;
A folded portion forming body 11 is obtained by folding the tubular body 9 located outside the cylindrical body 10 outward along the outer peripheral surface of the cylindrical body 10. Next, the folded portion forming body 11 is positioned substantially at the center of the disc-shaped body 12 from which the cover cloth 1 has been cut out on the base plate 13, and the upper surface of the cylindrical body is pressed by a welder-type pressurizing die using a holding base. Weld by heating method. Next, the excess cover cloth D at the base of the cylindrical body 9 welded to the disk-shaped body 12 is removed to obtain a hat-shaped body 14. Next, a ventilation port E is provided at a position corresponding to the inner shin of the tubular body welded from the back side of the hat-like body. A round cloth bellows which is formed by connecting the hat-shaped body to the opening of the bellows by sewing.