JPH0149558B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable not only to contact materials for wastewater treatment filter beds, but also to earth retention agents for earthworks, bed materials for hydroponic cultivation, fish reefs (for spawning), etc. The present invention relates to a string-like member that can also be used.

[Conventional technology]

Hereinafter, the contact material will be explained as an example.

FIG. 7 shows a conventional string-like contact material, in which FIG. 7A is a side view and FIG. 7B is a sectional view thereof. This contact material 20 is a string-like member whose outer surface is covered with a large number of rings of thin fibers such as vinylidene chloride, and has a molded outer diameter of 25 mmφ and a tensile strength of about 10 kg, for example. .

This contact material 20 can be applied to, for example, a 1 m wide expanded rod.
A plurality of contact materials 20 having a length of 1 to 5 m are tied together at the upper and lower ends at intervals of 30 to 50 mm, and used by hanging them in a contact aeration tank at predetermined intervals. Compared to conventional contact materials, the porosity is higher and the flow rate in the tank can be faster, so the contact effect is better, and the amount of sludge retained is larger, so a larger volume load can be achieved. Since it is string-shaped, it can be installed freely inside the tank, and settings can be made to suit the structure and volumetric load of the tank. There are some advantages.

[Problem that the invention seeks to solve]

However, as the activated sludge adheres to the fibers of the ring-shaped contact material 20, its surface becomes covered with a sticky substance, and the string-like contact material 20 eventually becomes clogged and becomes a single slag. However, there was a problem in that the contact area was significantly reduced.

The present invention has been made to solve these problems, and aims to obtain a contact material that maintains the above-mentioned characteristics of the string-like contact material 20 and which does not reduce the contact efficiency, and to obtain a method for manufacturing the same with high productivity. With the goal.

[Means for solving problems]

(1) The wing lace according to the present invention includes a belt-shaped sheet material, a sewing thread having a predetermined tensile strength that is sewn to the sheet material in a wave pattern with a wave height smaller than the width of the sheet material, and Horizontal cuts are formed from both edges of the sewing thread to the vicinity of the crest of each wave pattern of the sewing thread.

(2) A first method for manufacturing wing lace according to the present invention includes a sewing step of sewing sewing thread into a wide sheet material in a plurality of rows of wavy patterns at predetermined width intervals; This manufacturing method includes the steps of forming horizontal cuts from the middle part of the wave pattern to the vicinity of each wave height, and cutting the sheet material in the longitudinal direction at the middle part of the wave pattern.

(3) The second method for manufacturing a wing lace according to the present invention is a method for manufacturing a wing lace that is configured to form a mesh when stretched in both the vertical and horizontal directions, and is a method for manufacturing a wing lace made of a wide sheet material in the longitudinal direction. A first sewing process in which multiple rows of sewing thread are sewn in a waveform pattern with high wave height alternately on the left and right sides at predetermined width intervals and every predetermined wave number, and the middle of these sewing threads is sewn into the above-mentioned waveform pattern. A second sewing process in which the sewing thread is sewn in a wave pattern in the opposite direction to that of the previous sewing thread in such a way that the high wave height part intersects the high wave height part of the adjacent sewing thread, and the wave height of each of the wave patterns of the sheet material. A first cut forming step of forming a horizontal cut in a portion between a portion and an adjacent wave height portion, and a vertical cut forming step in a portion between an intersection portion of each wave pattern of the sheet material and an adjacent intersection portion. This is a manufacturing method including a second cut forming step of forming a cut.

[Effect]

(1) When the wing lace according to the present invention is stretched by holding both ends of the sewing thread, the sheet material opens the cut and stands up as a wing piece with a curved surface that is inclined with respect to the linearly stretched sewing thread. The surface of each raised wing acts as a contact surface, and the suture acts as a member to support the tensile loads applied to this member. When this wing race is used as a contact material, microorganisms adhere to the surface of the wing pieces, and each wing piece oscillates according to the flow of wastewater, so the contact efficiency with wastewater is high and the microorganisms are Even if the amount of adhesion increases, the surface area hardly changes, so there is no decrease in contact efficiency.

(2) A first method for manufacturing wing lace according to the present invention includes a sewing process in which a sewing thread having a predetermined tensile strength is sewn onto a sheet material in a wavy pattern at predetermined width intervals; A step of forming a horizontal cut from the middle part of each wave pattern to the vicinity of each wave height part, and a step of cutting the sheet material vertically at the middle part of the wave pattern are performed as a series of flow steps. This improves productivity.

(3) A second method for manufacturing wing lace according to the present invention is to sew a sheet material in the vertical direction by using the first sewing machine and the second sewing machine in the same operation pattern while stretching the sheet material in the horizontal direction. For each wave number, it is possible to sew waveform patterns that alternately intersect at high wave heights on the left and right sides, and this sewing process and the process of forming horizontal cuts from the middle of each waveform pattern to the vicinity of the adjacent wave height. and the process of vertically cutting between each intersection of each wave pattern of the sheet material and the adjacent intersection can be performed as a series of flow processes, increasing the productivity of the ring lace fastened in a mesh pattern. will improve.

[Embodiments of the invention]

(1) Figure 1 is a front view of one embodiment of the wing lace. 1 is a belt-shaped sheet material, for example, the width w is 5 cm,
It is made of non-woven fabric with a length of several tens of meters. 2 is sewing thread,
For example, nylon filament sewing thread type number 3 (tensile strength 9450 g) is used to sew in a triangular wave pattern using lock stitch, chain stitch, or double chain stitch. 3 is a horizontal cut formed from both side edges 1a of the sheet material 1 to the vicinity 2a of the wave height of the sewing thread 2, and when the sewing thread 2 is stretched with both ends, as shown in FIG. 2, the sheet material 1 opens from the cut 1, and wing pieces 1b are formed on both sides of the sewing thread 2, forming curved surfaces and standing upright.

This wing lace 4 has a tensile strength of approximately 20 kg because the sewing thread 2 is composed of two No. 3 nylon filament sewing threads, which is sufficient even when used as a contact material with a length of 5 m. Even when used in filter beds in the same conditions as conventional contact materials, it can be used as a contact material without clogging or reducing contact efficiency.

FIG. 3 is a diagram for explaining an embodiment of the method for manufacturing the wing lace shown in FIG. It has a width four times as wide as , and is sent at a constant speed in the direction of arrow A. Reference numeral 6 denotes a sewing machine, which has four sewing needles 7 arranged at the same intervals as the width w of the wing lace 4 to be manufactured, and feeds the sheet material 5 within a range of a runout width S1 smaller than the width w. They are interlocked and driven back and forth in the directions of arrows Bl and Br, forming triangular wave pattern stitches. A first slitter 8 has four blades 9 arranged at intervals w, and is driven reciprocally in the directions of arrows Cl and Cr in conjunction with the feeding of the sheet material 5 within a range of swing width S2. to form the cut 3. 10 is the second suritsuta,
It has three blades 11 arranged at intervals w, and as the sheet material 5 is fed in the direction of arrow A, the intermediate portion of the sewing thread 2 of each triangular wave pattern of the sheet material 5 is cut to a predetermined width. The wing lace 4 having a width w is formed by cutting the wing lace 4 at a width w.

FIG. 4 is a plan view showing another embodiment of the present invention. In this example, six wing laces 4 intersect, at every pitch P, a high-wave portion of the sewing thread 2 of the adjacent wing lace 4. A wave pattern is formed as shown in the figure, and the wing lace 4 is configured to form a mesh when stretched in the vertical and horizontal directions. In the figure, 13a and 13b indicate the intersection of the sewing threads 2. .

FIG. 5 is a plan view showing this embodiment in an extended state, and this figure shows the wing race of the embodiment shown in FIG. 4 in an extended state on a 1/2 scale. In this way, when the wing lace 4 of this embodiment is stretched in the vertical and horizontal directions, it becomes a net-like shape in which the entire length of the stitches of the sewing thread 2 is tied together, so that the anchor 14 can also be used to secure the embankment as shown in FIG. It can also be used as a soil retention material by fixing it to a slope or other surface and filling it with soil within a mesh.

The wing lace 4 of this embodiment can be extended only in the longitudinal direction and used as a contact material, etc. In this case, the wing pieces 1b are arranged densely and the contact area increases, and the wing lace of each strip is 4 are connected to each other with an appropriate pitch P, so it can be laid with a large tensile force, and the amplitude of swinging due to running water is reduced, so it does not contact and adhere to adjacent contact materials. This also has the effect of reducing the amount of sludge that is being removed and falling off.

FIG. 6 is a plan view for explaining one embodiment of the method for manufacturing the wing lace fastened in a net shape shown in FIG. There is. In the figure,
The sewing machine 6 has sewing needles 7 disposed at intervals twice the width w of the wing lace 4 to be manufactured. in the middle position and the first
The sewing machine 6a is composed of a second sewing machine 6b in which a sewing needle 7 is disposed at a position vertically separated by the same distance as the pitch P. The sewing thread 2 is driven back and forth in the directions of arrows Bl and Br in a pattern that alternately oscillates with a large oscillation width S2, and at each pitch P, the intersection portion 13 of the sewing thread 2 of the adjacent triangular wave pattern is located at the high wave height part of the sewing thread 2.
a, 13b are formed, and these intersection parts 13a, 13
It is concluded in b. The first slitter 8 has blades 9 arranged at intervals of 2w, and each time the sheet material 5 is fed in a 1/2 wave in a triangular wave pattern, it shifts in the width direction by w in the direction of arrows Cl and Cr. It moves and forms cuts 3a and 3b. Reference numerals 15 and 16 denote second and third slitters, each having blades 11 arranged at an interval of 2w and at positions shifted in the width direction by the interval w, and the blades 11 are arranged at the intersection part 13a of the sheet material 5. , 13b to the next intersection 13a, 13b is cut in the longitudinal direction to form cuts 12a, 12b.
As a result, the wing lace 4 fastened in a net shape as shown in FIG. 5 is formed.

As described above, this embodiment has the advantage that wing laces fastened in a net-like configuration having a complicated structure can be manufactured by a process that can be executed in a series of steps.

In addition, in the above embodiment, an example was shown in which a nonwoven fabric was used as the sheet material 1, but a woven fabric, a synthetic resin film material, or a foamed sheet material such as foamed polyurethane of an appropriate thickness may be used on one or both sides of these. It may also be a foamed sheet material such as a foamed polystyrene material or a foamed sheet material itself.

Furthermore, although we have shown an example in which a nylon filament sewing thread is used as the sewing thread 2, any sewing thread that can provide the necessary tensile strength can be used, and the sewing methods include lock stitching, ring stitching, double ring stitching, etc. Needless to say, any stitching method that provides high tensile strength, such as stitching, may be used.

Further, in the above embodiment, an example was shown in which the stitches were sewn in a triangular wave pattern, but a wave pattern such as a sinusoidal wave shape or a rectangular wave shape may also be used.

〔Effect of the invention〕

(1) In the wing lace according to the present invention, when both ends of a sewing thread sewn in a wave pattern on a band-shaped sheet material are stretched, the cuts formed in the sheet material open and each curved surface is created for the sewing thread. It forms upstanding blades, and when used as a contact material for filter beds, for example, high contact efficiency can be obtained, and even after long-term use,
This has the effect of reducing the drop in contact efficiency.

(2) The first method for manufacturing wing lace according to the present invention includes sewing a predetermined wave pattern using a sewing machine having a plurality of sewing needles, and
Since the slitters are used to form cuts in the width direction of the sheet material and to cut the sheet material in the longitudinal direction, it is a highly productive manufacturing method that allows multiple wing laces to be produced in a series of steps.

(3) The second wing lace manufacturing method according to the present invention includes a plurality of sewing needles that are spaced apart in the vertical direction by the mesh pitch P and are disposed at positions shifted in the horizontal direction by predetermined width intervals. Using the first and second sewing machines equipped with In addition, since the second and third slitters are used to form vertical cuts between the intersections of each wave pattern and the next intersection, multiple wing laces can be formed in a series of steps. It is possible to manufacture products that are fastened in a mesh pattern.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a plan view showing the wing lace of this embodiment in an extended state, and FIG. 3 is a plan view of the wing lace manufacturing method shown in FIG. 2. A diagram for explaining one embodiment, FIG. 4 is a plan view of another embodiment of the present invention,
Fig. 5 is a plan view showing the wing lace shown in Fig. 4 when it is stretched in the vertical and horizontal directions; FIG. 7 is a diagram illustrating an embodiment of the method for manufacturing the wing lace fastened into a mesh shown in the figure, and FIG. 7 is a diagram showing a conventional string-like contact material. 1... Band-shaped sheet material, 1a... Side edge, 1b...
... Wing piece, 2 ... Sewing thread, 2a ... Near the wave height, 3
...Horizontal cut, 4...Wing lace, 5
... Wide sheet material, 6, 6a, 6b ... Sewing machine, 7 ... Sewing needle, 8, 10, 15, 16 ... Sliver, 9, 11 ... Blade, 12a, 12b ... Vertical cut, 13a , 13b... intersection of sewing threads. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A belt-shaped sheet material in which horizontal cuts are formed alternately from both side edges to the other edge beyond the center line at a predetermined pitch, and the terminal ends of each of the above-mentioned cuts of this sheet material. It consists of a sewing thread having a predetermined tensile strength that is sewn into a wave pattern with crests near the edges, and when both ends of the sewing thread are stretched, the sheet material opens from each cut, and the stretched sewing thread A wing race that is constructed to form wing pieces that stand up with curved surfaces that are slanted. 2. The wing lace according to claim 1, wherein the sewing thread is sewn by lock stitch, chain stitch, or double chain stitch. 3 Multiple threads of wing lace are sewn together alternately on the left and right with the threads of the wing lace on both sides at a predetermined wave interval, respectively,
The wing lace according to claim 1, wherein each lace is configured to form a mesh when the threads of each lace are stretched and also stretched in the lateral direction. 4. The wing lace according to claim 1 or 3, wherein the sheet material is a woven fabric, a nonwoven fabric, a synthetic resin sheet material, or a sheet material whose at least one side is a foamed material. 5 A sewing process in which sewing thread is sewn into multiple rows of wavy patterns at predetermined width intervals in the longitudinal direction of a wide sheet material, and a sewing process in which the sheet material is sewn horizontally from the middle part of the wavy pattern to the vicinity of each crest. A method for manufacturing a wing lace comprising the steps of forming a cut, and cutting the sheet material in the longitudinal direction at an intermediate portion of the wave pattern. 6 At specified width intervals in the sewing direction of the wide sheet material,
A first sewing process in which multiple rows of sewing thread are sewn in a waveform pattern with a high wave height alternately on the left and right for each predetermined number of waves, and the middle of these sewing threads is sewn in a waveform pattern in the opposite direction to the above waveform pattern, and a second sewing step in which the sewing thread is sewn so as to intersect with the high wave portion of the adjacent sewing thread at the high portion of the sheet material; a first cut forming step of forming a transverse cut in the section; and a second cut forming step of forming a cut in the sewing direction in a portion between each intersection of each wave pattern of the sheet material and an adjacent intersection. A method for manufacturing wing lace including a process. 7 A first sewing machine in which a plurality of sewing needles are arranged at predetermined width intervals in the width direction of the sheet material, and a sewing machine with a predetermined distance between each sewing needle of this first sewing machine and a predetermined distance in the vertical direction. and a second sewing machine having a plurality of sewing needles respectively arranged at different positions, the first sewing machine and the second sewing machine simultaneously operate the sewing thread by increasing the amplitude at each predetermined wave number so as to intersect adjacent sewing threads. 7. The method of manufacturing a wing lace according to claim 6, wherein the first and second sewing steps are performed by feeding the sheet material in the longitudinal direction while displacing it in the lateral direction.