JP2962243B2 - Processing method and processing device for telescopic net - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing an expansion / contraction net used, for example, for storing small articles or luggage.

[0002]

2. Description of the Related Art In general, as to a moving means such as a vehicle or an airplane, a net which is provided behind a backrest of a seat and temporarily stores small articles such as magazines or a net which is used for fixing luggage is elastic. Is appropriately set.

As shown in FIG. 5, a telescopic net of this type is provided with a telescopic cord 20 which is stretchable, and a knit 21 made of a synthetic resin material having low elasticity is continuously knitted around the cord 20. In addition, it is known that a net-like body is formed by tangling and knitting the cord body 21 so that the elastic cord body 20 is connected at a predetermined interval. The stretchable net has a feature that it has a good appearance and is excellent in design because the mesh portion is formed without a knot without being in a dumpling shape.

Further, since the above-mentioned stretchable net is continuously knitted with a predetermined width and long, it has been necessary to cut it into a predetermined length at the time of use (processing).

[0005] Therefore, conventionally, when cutting the expansion and contraction net, an ultrasonic vibration or an ultrasonic vibration or heat is generated by a lower mold having a mountain-like shape along the width direction of the expansion and contraction net and an upper die which generates ultrasonic vibration or heat. Cutting was performed with heat, and at the same time, the knitting of the cutting edge 22 was welded with ultrasonic vibration or heat.

[0006]

However, the stretchable net processed as described above has a structure in which the string 21 is continuously knitted in a chain around the stretchable stretchable string 20, and is welded. Because the part that was done is only the knitted end, the knitting of the welded part is easy to unravel due to the load during expansion and contraction,
Once unraveled, there is a problem that all of the chain-like continuous strings 21 are unraveled and the net-like configuration is broken.

In some cases, a reinforcing edge band (not shown) is sewn to the welded cutting edge 22, but the sewing state is insufficient due to the sewing to the mesh portion. I will. Then, at the time of sewing the edge band, in order to pull the cut edge 22 to a predetermined width corresponding to the edge band, as described above, the cut edge 2
There is also a problem that the knitting of No. 2 is unraveled, and the sewing state of the cutting edge 22 and the edge band is further insufficient.

In order to solve the above-mentioned problems, the present invention provides a method and an apparatus for processing a stretchable net which can prevent the cut edge of the stretchable net from being unraveled. The purpose is.

[0009]

In order to achieve the above-mentioned object, a method for processing an elastic net according to the present invention comprises a step of knitting a string 21 around an attached elastic string 20 in a chain shape, and In a method for processing an elastic net, the mesh line 23 on the cut edge 22 side of the elastic net is folded back on another mesh line 24 in a method of processing the elastic net by knitting and knitting the cord body 21 so as to be connected at predetermined intervals. It is characterized in that it is positioned by pulling it to a predetermined width, and the polymerized portion is welded by ultrasonic vibration or heat.

In addition, the apparatus for processing a stretchable net according to the present invention knits a string 21 around an attached stretchable cord 20 in a chain shape, and connects the stretchable cords 20 at predetermined intervals. In the apparatus for processing a stretchable net by knitting and knitting the cord body 21, a processing surface 6 on which a cutting edge 22 of the stretchable net can be placed and the processing corresponding to the mesh row of the stretchable net are provided. A lower mold 1 having a plurality of positioning rods 8 that advance and retreat from the surface 6, and an upper mold having an abutting surface 14 that conducts ultrasonic vibration or heat with respect to the processing surface 6 of the lower mold 1. And a mesh 2 is folded back on another mesh row 24 to overlap the mesh row 23 on the cutting edge 22 side of the stretchable net, and is stretched to a predetermined width to be inserted and positioned in each positioning rod 8. The processing surface 6 of the mold 1 and the contact surface 14 of the upper mold 2 It is characterized in that both clamping welded polymerization portion of each mesh column 23 and 24 between.

That is, the string 21 is knitted in the form of a chain around the stretchable string 20 provided side by side, and the string 21 is entangled and knitted so that the stretchable string 20 is connected at a predetermined interval. Is welded in a state where the mesh row 23 on the side of the cutting edge 22 is folded over another mesh row 24 and superposed, and the cutting edge 22 is welded inward. Therefore, the load at the time of expansion and contraction is alleviated by the other expansion and contraction portions welded together, and the knitting is prevented from being unraveled.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of a telescopic net processing apparatus according to the present invention, and FIG. 2 is a side sectional view showing the telescopic net processing apparatus.

As shown in FIG. 5 in the above-described conventional example, the apparatus for processing an elastic net according to this embodiment knits a string 21 around an attached elastic string 20 in a chain shape. The present invention relates to a telescopic net formed by entanglement and knitting of the cord body 21 so that the cord body 20 is connected at a predetermined interval. The cutting edge 22 of the expansion / contraction net is processed, and the lower die 1 and the upper die 2 are mainly provided for clamping the cutting edge 22.

First, the lower mold 1 is composed of a base 3 and a processing table 4 as shown in FIG. The base 3 mounts and fixes the processing table 4 and is fixed on a line through which a telescopic net to be processed flows.

The processing table 4 is a left-right horizontally long rectangular parallelepiped having a length corresponding to the width direction of the telescopic net, and has a positioning step 5 on its upper surface. The positioning step 5 is formed in a substantially rectangular shape, and is a mesh row 23, 2 in the width direction of the telescopic net.
4 has the same number as the number of meshes in the left-right direction, and has a uniform processing surface 6 in which substantially square corners are continuous on the upper surface thereof.

As shown in FIG. 1 and FIG. 2, the processing step 4
A substantially rectangular sliding hole 7 penetrated in the vertical direction is provided. A positioning rod 8 is inserted into the sliding hole 7 so as to be able to move forward and backward.

The positioning rod 8 has a prismatic shape corresponding to the shape of the sliding hole 7, and has a concave portion 9 at the bottom and a cutout groove 10 at the side (side corner). . As shown in FIG. 2, the positioning rod 8 is inserted between the sliding hole 7 and the coil spring 11 between the recess 9 and the upper surface of the base 3.
Is always urged upward. Further positioning rod 8
Is locked by a fixing pin 12 inserted from the side of the processing table 4 so that its upper end projects from the processing surface 6 by a predetermined length. The fixing pin 12 is fixed by a male screw 13 screwed from the upper surface side of the processing table 4.

Therefore, depending on the vertical length of the notch groove 10, the positioning rod 8 can be provided with a state in which the upper end protrudes from the processing surface 6 by a predetermined length and a state in which the upper end sinks below the processing surface 6. And is always urged upward.

The shape of the sliding hole 7 formed in the processing table 4 is not limited to a substantially rectangular shape, and may be, for example, a circle, a polygon, or the like. 8 may be a column corresponding to the shape.

A notch groove 10 provided in the positioning rod 8
Is not limited to the configuration in which the side portion of the positioning rod 8 is cut out, but may be, for example, a slit hole or the like.

Next, as shown in FIG. 2, the upper mold 2 transmits ultrasonic vibrations from a vibrator (not shown) to the lower mold 1, and is provided on the lower mold 1 at the bottom thereof. It has a smooth abutment surface 14 that can abut the processing surface 6 of the position determining step 5.

Hereinafter, the operation of processing the edge of the telescopic net by the above-described telescopic net processing apparatus will be described. First, an elastic net continuously and knitted with a predetermined width is cut into a predetermined length. This cutting may be performed by a conventional cutting method performed by ultrasonic vibration or heat.

First, the cutting edge 22 of the telescopic net is positioned and mounted on the lower mold 1. Specifically, FIGS. 3 and 4
As shown in (a), the elastic net is pulled in the width direction,
An endmost mesh row 23 (hereinafter, referred to as a first mesh row) arranged in the width direction at the cutting edge 22 is placed, and a next (other) mesh row 24 (hereinafter, referred to as a second mesh row) is positioned. Hang on the rod 8.

Next, as shown in FIG. 4 (b), the first mesh row 23 is folded back, and each of them is hung on the positioning rod 8 so as to be superimposed on the second mesh row 24. Is lowered to sandwich each of the polymerized mesh rows 23 and 24 between the lower mold 1.

At this time, the positioning rod 8 is positioned on the contact surface 1 of the upper mold 2.
4 and retreats downward, the first mesh row 23
And only the second mesh row 24 is sandwiched between the processing surface 6 of the lower die 1 and the contact surface 14 of the upper die 2 and welded together by the transmission of ultrasonic vibration from the upper die 2. .

As described above, the stretchable net having the cut edge 22 formed thereon is pulled to a predetermined width by the positioning rod 8 of the lower mold 1 and has a first mesh row 23 and a second mesh row 24. Are welded in a polymerized state, so that the cut edge 2
The knitting of No. 2 is reliably prevented.

Therefore, in the telescopic net processing apparatus configured as described above, the lower die 1 having the processing surface 6 provided with the movable positioning rod 8 and the ultrasonic wave with respect to the processing surface 6 are provided. An upper mold 2 having an abutting surface 14 for transmitting vibration, and a first mesh row at an endmost position on a cutting edge 22 of the stretchable net between the lower mold 1 and the upper mold 2. 23 and the second mesh row 24 at the next position are folded and positioned and welded in a state of being overlapped, so that at the edge of the telescopic net, the easy-to-melt cutting edge 22 is located and welded inward, Since the load at the time of expansion and contraction is reduced at the other expanded and contracted portions welded together, the knitting can be prevented from being unraveled.

Further, the positioning rod 8 which can move forward and backward can easily position the mesh rows 23 and 24 of the telescopic net during processing and pull in the width direction easily.

Further, in the stretchable net processed in this manner, the first mesh row 23 is folded over the second mesh row 24 and welded together, so that the welded portion includes the cut edge 22. Because of the wide range, the knitting of the cutting edge can be reliably prevented.

In the processed stretchable net, the first mesh row 23 is folded back to the second mesh row 24, and the first mesh row 23 and the second mesh row 24 are not displaced. Since they are welded in a polymerized state, the edges after the processing are clean and the design can be improved.

Further, in the processed stretchable net, the edge after the processing is welded in a state where it is pulled to a predetermined width. For example, when sewing the edge band after the processing,
The work can be easily performed, and the sewn portion has a certain thickness due to the polymerization of the first mesh row 23 and the second mesh row 24. Can be improved in strength.

In the above-described embodiment, when the cutting edge is processed, the first mesh row 23 and the second mesh row 24
Is folded and polymerized. However, the present invention is not limited to this. For example, the mesh row may be folded and polymerized to another mesh row, for example, the first mesh row and the third mesh row may be polymerized.

In the above-described embodiment, the upper mold 2
Is configured to conduct ultrasonic vibration from the vibrator, but may be configured to conduct heat from a heat source (not shown).

[0034]

As described above, according to the method for processing a stretchable net according to the present invention, the mesh row on the cutting edge side of the stretchable net is folded back onto another mesh row and polymerized, and is positioned by pulling it to a predetermined width. By welding the superimposed portion together with ultrasonic vibration or heat, at the edge of the stretchable net, the easy-to-melt cut edge is located inside and welded, and the load during expansion and contraction was welded together. Since the elastic portion is relaxed, the knitting can be prevented from being unraveled.

Further, the apparatus for processing a telescopic net according to the present invention comprises a lower mold having a processing surface provided with a movable positioning rod, and an ultrasonic vibration or heat conducting to the processing surface. An upper mold having a contact surface is provided, and in a state where the mesh row on the cutting edge side of the stretchable net is folded over another mesh row and polymerized, it is pulled to a predetermined width and positioned on the positioning rod, By sandwiching and welding the overlapping portions of the respective mesh rows between the contact surface of the mold and the processing surface of the lower mold, the positioning of the respective mesh rows of the expansion and contraction net can be facilitated during processing. In addition, tension in the width direction can be easily performed.

The stretchable net obtained by the method and apparatus for processing a stretchable net according to the present invention has a welded portion in which the mesh row on the cutting edge side is folded back onto another mesh row and welded together. Since the range is wide including the cutting edge, the knitting of the cutting edge can be reliably prevented.

The stretchable net obtained by the method and the apparatus for processing the stretchable net according to the present invention is welded in a state where the mesh line of the cut edge and the other mesh line are superimposed without displacement and are processed. The rear edge is clean and the design can be improved.

Further, since the stretchable net obtained by the method and the apparatus for processing the stretchable net according to the present invention is welded in a state of being stretched to a predetermined width, the work for the next working can be easily performed. Out.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of an apparatus for processing a stretchable net according to the present invention.

FIG. 2 is a side sectional view showing a processing device for a telescopic net.

FIG. 3 is a plan view showing a processing operation of the telescopic net.

FIG. 4 (a) is a side sectional view showing a processing operation of the telescopic net. (B) Sectional drawing which shows the processing operation | movement of an expansion-contraction net.

FIG. 5 is a schematic view of a telescopic net.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower mold, 2 ... Upper mold, 3 ... Base, 4 ... Processing table, 5 ...
Positioning step portion, 6: machining surface, 7: sliding hole, 8: positioning rod,
9 recess, 10 notch groove, 11 coil spring, 12 fixing pin, 13 male screw, 14 contact surface, 20
Stretched cord body, 21 ... cord body, 22 ... cut edge, 23 ... first mesh row, 24 ... second mesh row.

Claims (2)

(57) [Claims] 1. A stretchable net formed by knitting a cord around a stretchable cord attached thereto in a chain shape and tangling and knitting the cord so that the cord is connected at a predetermined interval. In the processing method, the mesh line on the cutting edge side of the stretchable net is folded back onto another mesh line and polymerized, pulled to a predetermined width and positioned, and the polymerized portion is welded by ultrasonic vibration or heat. A method of processing a stretchable net. 2. A stretchable net formed by knitting a string around a stretchable cord attached side by side and knitting the string so that the stretchable string is connected at a predetermined interval. In the processing device, a lower mold having a processing surface on which a cutting edge of the telescopic net can be placed, and having a plurality of positioning rods which advance and retreat from the processing surface in correspondence with a mesh row of the telescopic net. An upper mold having an abutting surface that conducts ultrasonic vibration or heat with respect to the processing surface of the lower mold, and the mesh row on the cutting edge side of the stretchable net is placed on another mesh row. It is folded back and polymerized, and it is pulled to a predetermined width and inserted and positioned in each positioning rod, and the overlapped portions of each mesh row are welded together between the contact surface of the upper mold and the processing surface of the lower mold. A processing device for a telescopic net.