JPH0436647Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention mainly relates to a structure of a connecting part of a string for joining both ends of a handbag for small items such as folding umbrellas, transistor radios, cameras, etc. to form a ring shape. In particular, the present invention relates to a connecting structure suitable for connecting round cords.

[Conventional technology]

Conventionally, as a connecting structure for both ends of this kind of handbag, a metal connector 15 with a metal ring as shown in FIG. 12, or a resin connector 17 whose outer periphery is covered with resin as shown in FIG. 13 has been used. It is being Here, these conventional couplers 15 and 17
will be explained with reference to FIGS. 12 and 13, but the same functional parts are given the same reference numerals and the explanation will be omitted.

As shown in FIG. 12, the metal connector 15 is
In general, both ends 1a and 1b of a handbag 1 made of a round cord such as a braided cord are butted and joined, and the ends 1a and 1b are joined to form an annular intermediate part 1 of the string 1.
c (see Fig. 7), and a rectangular thin metal plate constituting the metal connector 15 is tightened around the entire outer periphery of the overlapping part to enclose it, or the claws on both end surfaces of the thin metal plate are tightened. Both ends 1 of the string 1 depending on the piece
a, 1b and the intermediate portion 1c are connected. The hand strap 1, which is formed into an annular shape by joining the two end portions 1a and 1b in this way, is divided into a large diameter annular hand portion 2a and a small diameter annular hanging portion 2b, with the connecting tool 15 as a boundary, A small item 1 such as a folding umbrella is suspended from the hanging part 2b by a metal hanging ring 4.
6 is hanging.

In addition, as shown in FIG. 13, the resin coupling tool 1
7 joins the ends 1a and 1b of the handbag 1, and overlaps the ends 1a and 1b with the middle part 1c of the annularly formed string 1, so that the entire overlapped part The structure is such that the outer periphery is integrally molded with resin using an injection type or pressure molding machine and bonded.

[Problem that the invention attempts to solve]

However, in the case of a string joining structure using the conventional binding tool as described above, the metal binding tool 1
The problem is that the string 1 is likely to be damaged at the part where the end surface of the metal ring No. 5 and the string 1 come into contact, and the coupling tool 15 may get caught on clothes etc. and be damaged, and rust and discoloration are also likely to occur. In addition, in the case of a round cord, there was a risk that the joint of the cord 1 would slip if a strong force was applied.

On the other hand, in order to solve such problems, conventional high-end products have been coated with heat-shrinkable vinyl chloride or the like over the entire outer periphery of the metal connector 15; The problem was that it was troublesome and expensive.

On the other hand, the conventional resin connector 17 is molded individually using a large molding machine, making it difficult to automate the manufacturing process and not suitable for mass production. There were various technical problems in that the string 1 was easily deformed by the action, and burrs were likely to be formed at the joint between the string 1 and the end face of the connector 17. Furthermore, when a strong force is applied to both ends of the string, there is a problem in that the string slips out of the connector 17.

In view of these circumstances, the present invention aims to provide a joint structure for round cords that has a strong connection between the cord and the binding tool, is aesthetically pleasing, and is easy to automate the manufacturing process. This is the purpose.

[Means for solving problems]

The structure of the present invention to achieve the above purpose is
The first embodiment will be explained with reference to FIGS. 1 to 9, which correspond to the first embodiment.

That is, the present invention provides a joint of a string in which both ends of a string are placed close to each other in a facing manner, and both ends of the string that are close to each other are overlapped with an intermediate part of the string, and a joint of the string. In the string binding structure, the binding device 3 has a U-shaped cross section and has two connections spaced apart in the longitudinal direction in the middle part of the inner bottom surface. Protrusion 6
one coupling piece 3a on which protrusions a and 6b are provided;
The other connecting piece 3b is polymerized and fixed to the opening upper surface of the one connecting piece 3a, and the intermediate part 1c of the string 1 is connected to the one connecting piece 3.
It is pushed between the inner wall surface of the string 1 and the two connecting protrusions 6a, 6b, and both ends 1a, 1b of the string 1
is pushed between the other inner wall surface of the one coupling piece 3a and the coupling protrusions 6a, 6b, and this string 1
It is characterized in that the upper surfaces of both side walls of one of the connecting pieces 3a into which is pushed in and the upper surfaces of the two connecting protrusions 6a and 6b are welded and superimposed to the opposing surfaces of the other connecting piece 3b.

[Effect]

In order to form the above string connection structure, string 1
The intermediate portion 1c and both tip portions 1a, 1b of the joint portion are pushed into and held in the parallel grooves between the inner wall surface and the two joint protrusions 6a, 6b of one of the joint pieces 3a, respectively. Thereafter, the other joining piece 3b is superposed on top of the joining piece 3b and welded together.

〔Example〕

Hereinafter, the string connection structure according to the present invention will be explained in detail with reference to an embodiment shown in FIGS. 1 to 11. In addition, the same reference numerals are given to the same functional parts as in FIG. 12 of the conventional structure.

1 to 9 show a first embodiment of the string connection structure according to the present invention.
Figures 0 and 11 show the second embodiment.

In the first embodiment shown in FIGS. 1 to 9, 1
is a string made of a round string such as a braided string of a predetermined length, and both ends 1a and 1b (see FIGS. 7 and 8) of the string 1 are placed close to each other in a facing manner. Both end portions 1a and 1b are overlapped with the middle portion 1c of the string 1 to form a joint portion 2 of the string 1.

Further, the joint part 2 of the string 1 is surrounded by a binding tool 3 that surrounds its entire outer periphery and is welded and welded. It is composed of one U-shaped coupling piece 3a and the other coupling piece 3b, and these coupling pieces 3a and 3b are connected to the string 1.
The joint 2 of the string 1 is fitted onto the outer periphery of the joint 2 from the front and back, and then heated by ultrasonic processing or other heat welding.
and are integrally fixed to each other.

The string 1 is formed with a large-diameter annular hand portion 2a and a small-diameter annular hanging portion 2b with the connecting portion 2 as a boundary, and the hanging portion 2b is used to hang small items. A hanging ring 4 for lowering is suspended.

On the other hand, as shown in FIGS. 3 and 4, one of the connecting pieces 3a has countersunk holes 5a, 5a formed at the tip thereof at two locations along the longitudinal direction of the inner wall surface. A truncated conical coupling protrusion 6 having holes 5, 5
a, 6b are bored, and the rising upper edges on both sides are stepped side walls 7a, which are higher on the inner side.
7b is formed.

On the other hand, as shown in FIGS. 5 and 6, the other coupling piece 3b has two coupling projections 6a and 6b of the one coupling piece 3a at two locations along the longitudinal direction of its inner wall surface. Fixing protrusions 8a, 8b that fit into the fitting holes 5, 5 are protrudingly provided, and the tips of the fixing protrusions 8a, 8b are conically tapered. Further, the rising portions on both sides of the other coupling piece 3b are the side walls 7a, 7 of the one coupling piece 3a.
A side wall 9 that fits into the side surface of the high inner side wall of b.
a, 9b, and furthermore, the inner wall surface of the other connecting piece 3b is located inside the side walls 9a, 9b and facing the upper edge surface of the side walls 7a, 7b of the one connecting piece 3a. , triangular prism-shaped welding protrusions 10a and 10b are respectively provided to protrude in the longitudinal direction of the inner wall surface.

The connecting part 2 of the string 1 is enclosed and connected to the connecting protrusions 6a and 6b inside the connector 3, which is constituted by the one connecting piece 3a and the other connecting piece 3b. , and further the connecting piece 3a,
3b and the joint portion 2 are formed by heating or the like at the tips of the fixing protrusions 8a and 8b of the other joining piece 3b,
The coupling protrusions 6a, 6b are strongly fixed to each other by melting the distal ends of the countersunk holes 5a, 5a and the welding protrusions 10a, 10b.

Incidentally, the two inclined surfaces formed in the longitudinal direction of each of the surfaces of the one connecting piece 3a and the other connecting piece 3b are for aesthetic reasons and to prevent clothes or the like from getting caught.

Next, the manufacturing process of the above-mentioned string connection structure will be explained with reference to FIGS. 7 to 9.

First, as shown in FIG. 7, after cutting the string 1 to a certain size, ring parts 2a and 2b are formed at both left and right ends.
A hanging ring 4 is suspended from one of the ring parts 2b.

Subsequently, as shown in FIG. 8, the ends 1a and 1b of the string 1 formed as described above are brought close to each other in a facing manner, and the ends 1a and 1b and the string 1 superimposed thereon are separated. The intermediate portion 1c is inserted into the inner wall surface of one of the connecting pieces 3a and the connecting protrusions 6a, 6b, and the connecting protrusions 6a, 6b are gripped and engaged, thereby forming the connecting portion 2. .

Subsequently, as shown in FIG. 9, the joint part 2 of the string 1 is attached to the side wall 7 of one of the joint pieces 3a which is engaged and held by the joint protrusions 6a and 6b as described above.
a, 7b, and the fixing protrusions 8a, 8b fit into the outer surfaces of the side walls formed inside the coupling protrusions 6.
The other coupling piece 3b is fitted into the holes 5 and 5 of the coupling pieces a and 6b until the welding protrusions 10a and 10b come into contact with the upper edge surfaces of both rising parts of one coupling piece 3a. Let them wear it. Here, when heated and pressurized by ultrasonic processing etc., the fixing protrusion 8
a, 8b, the peripheral parts of the countersunk holes 5a, 5a at the ends of the coupling protrusions 6a, 6b, and the welding protrusions 10a,
10b gradually melts, and this melt becomes the bonding piece 3.
a, 3b and the joint part 2 of the string 1, the other joining piece 3b fits deeper into one joining piece 3a, and the upper edge surface of both rising parts of the other joining piece 3b is on one side. The connecting piece 3a stops when it comes into contact with the upper edge surfaces of the raised portions of the connecting piece 3a at different levels, and at this point, the connecting pieces 3a and 3b are welded to form the connecting tool 3, as shown in FIG. Further, inside the above-described welded coupling tool 3, the entire outer periphery of the joint portion 2 of the string 1 is also enclosed and welded to and surrounded by the coupling tool 3.

Furthermore, the molten resin that melts during heating during ultrasonic processing, etc. described above is effective in fitting the inner surface of the rising portions on both sides of the other connecting piece 3b with the outer surface of the stepped portion of the rising portions on both sides of the connecting piece 3a. As a result, leakage to the outside is prevented, resulting in a beautiful finish without the formation of burrs or the like.

Next, a second embodiment regarding the structure of the string according to the present invention will be described with reference to FIGS. omitted.

In these figures, one of the connecting pieces 3a has
Truncated cone-shaped coupling protrusions 11a and 11b are protruded at two locations along the longitudinal direction of the inner wall surface, and fixing protrusions 11a and 11b are provided on the rising upper edge surfaces on both sides.
2a and 12b are provided in a protruding manner. The other coupling piece 3b has guide depressions 13a, 13b into which the heads of the coupling projections 11a, 11b fit, and depressions 14a, 14a into which the fixing projections 12a, 12b fit.
4b is formed.

In the second embodiment configured as described above, the joint portion 2 of the string 1 is constructed in exactly the same way as the first embodiment.
, the inner wall surface of one coupling piece 3a and the coupling protrusion 11
a, 11b and the coupling protrusions 11a, 11
(b) and insert them into the engaged state.

Subsequently, the joint part 2 of the string 1 is connected to the joint protrusions 11a, 1
One coupling piece 3a that is engaged and held by 1b,
Coupling protrusions 11a, 11b and fixing protrusions 12a, 1
The other connecting piece 3b is fitted and attached so that the connecting pieces 2b fit into the guide recesses 13a, 13b and the recesses 14a, 14b, respectively. Here, by heat welding such as ultrasonic processing, the joint portion 2 of the string 1 is welded together with the joint pieces 3a, 3b while being engaged by the joint protrusions 11a, 11b.

[Effect of idea]

As explained above, according to the string connection structure of the present invention, the intermediate portion 1c of the joint portion of the string 1 and both tip portions 1
a, 1b inside the coupling tool 3, the inner wall surface of one coupling piece 3a and the two coupling protrusions 6a, 6.
The opposing surfaces of the string 1 are pushed in and held in parallel between the connecting protrusions 6a and 6b.
This creates a recessed state, and this recess acts like a force in the pulling direction of the string 1, so that the string 1 cannot be pulled out from the coupler 3.

In addition, when the other connecting piece 3b is polymerized and welded to the upper surface of one connecting piece 3a to sandwich the connecting part of the string 1, the string 1 is attached to both inner wall surfaces of one connecting piece 3a as described above. Since the string 1 is pushed in and held between the connecting protrusions 6a and 6b, a part of the string 1 does not deform and protrude between the opposing surfaces of both connecting pieces, and the polymerization and welding of both connecting pieces is prevented. It becomes complete and the work becomes easy.

Furthermore, one coupling piece 3a and the other coupling piece 3b
Since the polymerization welding is performed at four locations: the upper surface of both side walls of one of the connecting pieces 3a and the upper surface of the two connecting protrusions 6a and 6b, if there is a defect in the welding of some parts, However, it is firmly welded, and the stress against external force is also dispersed to the four locations, and furthermore, the both side wall surfaces and the two connecting protrusions 6a, 6
(b) Since the molten metal during welding on the upper surface penetrates into the inside of the string and solidifies, thereby integrating the string and the coupling, there is no fear that the coupling will come off during use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a coupling device according to a first embodiment of the string coupling structure according to the present invention, FIG. 2 is a side view showing a cross section taken along the line - in FIG. FIG. 4 is a diagram showing one coupling piece of the same as above, FIG. 3 is a plan view, FIG. 4 is a side view showing a cross section taken along the line - in FIG. Fig. 5 is a plan view, Fig. 6 is a side view showing a cross section taken along the line - in Fig. 5, and Figs. FIG. 7 is a perspective view showing the state in which the joint of the string is formed and the state of one and the other connecting piece, and FIG. 8 is a perspective view showing the state where the joint of the string is formed inside one of the connecting pieces. FIG. 9 is a plan view showing the engaged state; FIG. 9 is a cross-sectional view showing the state in which one of the connecting pieces is fitted with the other connecting piece; FIGS. 10 and 11. The figures show a coupling device according to a second embodiment of the present invention, in which FIG. 10 is a side view showing a cross section, and FIG.
The figures are a front view showing a cross section along the line of Fig. 10, that is, a cross section in the longitudinal direction, Fig. 12 is a perspective view of a conventional coupling using a metal ring, and Fig. 13 is a conventional coupling using integral resin molding. FIG. 1... String, 2... Joint part, 2a... Hand part, 2
b... hanging part, 3... coupling tool, 3a... one coupling piece, 3b... other coupling piece, 4... hanging ring,
5... Fitting hole, 5a... Countersunk hole, 6a, 6b... Combining protrusion, 7a, 7b... Side wall, 8a, 8b... Fixing protrusion, 9a, 9b... Side wall, 10a, 10b...
...Welding protrusion, 11a, 11b...Joining protrusion, 12
a, 12b...fixing protrusion, 13a, 13b...guiding recess, 14a, 14b...recess, 15...metal ring fitting, 16...umbrella, 17...resin integrally molded connector.

Claims (1)

[Claims for Utility Model Registration] A joint of a string in which both ends of the string are placed close to each other in a facing manner, and both ends of the string that are close to each other in the opposite manner are overlapped with the middle part of the string; In a string connection structure comprising a synthetic resin binding tool that holds a joint, the binding tool has a U-shaped cross section and has two wires spaced apart in the longitudinal direction in the middle part of the inner bottom surface. It consists of one connecting piece from which a connecting protrusion is protruding, and the other connecting piece that is superimposed and fixed to the upper surface of the opening of the one connecting piece, and the middle part of the string is located inside the one connecting piece. The string is pushed between the wall surface and the two coupling protrusions, and both ends of the string are pushed between the other inner wall surface of the one coupling piece and the coupling protrusion, and the string is pushed between the other inner wall surface of the one coupling piece and the coupling protrusion. A string connection structure characterized in that the upper surfaces of both side wall surfaces of a connecting piece and the upper surfaces of the two connecting protrusions are welded and superimposed to the opposing surface of the other connecting piece.