JPH10195740A - Knitted structure, its production and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a knitted structure suitable as a reinforcing material for an airtight bag for air jack, air bag or the like, and to provide a method of producing the same and a device therefor. SOLUTION: This method of producing a knitted structure connects a pair of front and rear knitted fabrics A with 2 or more inserted yarns B at intervals of each given stitch pitch P1 and course pitch P2. Each of the inserted yarns B is continuous in the longitudinal direction of each of the knitted fabrics A, limiting the maximum distance between a set of the knitted fabrics A by connecting them to each other alternately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the production of airtight bags for use in air jacks, airbags, and the like.
The present invention relates to a knitted structure that can be suitably used as a reinforcing material for a bag, a knitting method thereof, and a knitting device.

[0002]

2. Description of the Related Art A pneumatic device such as an air jack or an air bag has a flexible, high pressure-resistant and air-tight bag as a main component.

[0003] A bag used for such an application is formed by applying or impregnating a cloth-like reinforcing material with a liquid sealing material such as rubber to a predetermined thickness to form a strong airtight sheet material. It is usual that a pair of front and rear sheet members are opposed to each other and the periphery thereof is hermetically connected to form a hollow shape.

[0004]

According to such a conventional technique, the bag body is completely hollow inside and has no pressure-resistant member in the middle, so that the strength against the internal pressure is not sufficient. There was a problem that it was extremely difficult to make a large product with high pressure resistance. This is because the front and rear sheet materials may swell greatly due to the internal pressure and may be easily torn at the center.

In view of the above-mentioned problems in the prior art, an object of the present invention is to connect a pair of front and rear knitted fabrics at predetermined stitch pitches and course pitches through a plurality of insertion yarns, thereby achieving high pressure resistance. An object of the present invention is to provide a knitted structure that can be suitably used as a reinforcing material when manufacturing a large-sized bag, a knitting method thereof, and a knitting device.

[0006]

In order to achieve the above object, the first invention according to the present application comprises a pair of front and rear knitted fabrics and a vertical direction (knitted fabrics) at a predetermined stitch pitch of the knitted fabric. The direction of travel, that is, the direction of the wale;
The main point is that the insertion yarns are alternately connected to each knitted fabric at a predetermined course pitch.

[0007] In a second aspect of the invention, a pair of front and rear knitted fabrics are knitted via front and rear needle beds, and each knitted fabric is connected to the front and rear knitted fabrics via front and rear knitting needles corresponding to a predetermined stitch pitch. The gist of the present invention is to alternately connect a plurality of insertion yarns for each predetermined course pitch.

[0008] The structure of the third invention comprises a front and rear needle beds, a leading yarn slot for supplying a knitting yarn to each of the needle beds, and
The gist of the present invention is to provide a common secondary yarn inlet that supplies a plurality of insertion yarns alternately.

[0009] The needle beds can be opened and closed at an interval therebetween, or can be relatively moved in the longitudinal direction.

[0010] Each needle bed may be provided with a pressing member for pressing down the inserted yarn from the auxiliary yarn guide.

[0011]

According to the first aspect of the present invention, the plurality of insertion yarns are continuously arranged in the longitudinal direction at a predetermined stitch pitch with respect to the pair of front and rear knitted fabrics. Are connected alternately. Therefore, each insertion yarn can limit the maximum interval of the knitted fabric over the entire surface of the front and rear knitted fabrics, and can reliably prevent the knitted fabric from being excessively expanded. However, each insertion yarn is connected to the front and rear knitted fabrics via a tack or a knit in the knitting process.

The insertion yarn is inserted between the front and rear knitted fabrics.
By making the lengths uniform, the front and rear knitted fabrics can be held parallel to each other, and by vertically increasing or decreasing the length of each knitted fabric linearly, one of the front and rear knitted fabrics is made to be the other. It can be held obliquely with respect to. Also, the insertion thread
By changing the length between the front and rear knitted fabrics in a curved manner in the vertical direction of each knitted fabric, the interval between the front and rear knitted fabrics can be smoothly changed. Furthermore, the insertion yarn may change the length between the knitted fabrics in the horizontal direction of each knitted fabric (the direction perpendicular to the longitudinal direction, that is, the direction of the course, the same applies hereinafter). The length may be varied in both directions.

[0013] The insertion yarn is continuously arranged in the longitudinal direction at a predetermined stitch pitch on each knitted fabric and connected at a predetermined course pitch. May be kept constant throughout the knitting process, or may be arbitrarily changed according to a knitting plan determined in advance. Also,
The course pitch for connecting the insertion yarn to each knitted fabric may be the same or different for both knitted fabrics.

According to the structure of the second invention, the front and rear knitted fabrics are knitted via the front and rear needle beds, and the knitted fabric is connected to the front and rear knitted fabrics via the front and rear knitting needles at every predetermined course pitch of each knitted fabric. By alternately connecting the plurality of insertion yarns, the knitted structure according to the first invention can be continuously knitted. Each insertion yarn is connected to the stitches forming each knitted fabric through a tack or a knit by using a common knitting needle before and after the knitting needle corresponding to a predetermined stitch pitch, that is, a knitting needle for knitting each knitted fabric. Because it can be.

According to the structure of the third invention, the front and rear needle beds can knit the front and rear knitted fabrics together with the main yarn feeder for supplying the knitting yarn to each. On the other hand, the secondary yarn feeder according to the first aspect of the present invention relates to the first invention by supplying a plurality of insertion yarns alternately to each needle bed and alternately connecting the insertion yarns to each knitted fabric via the knitting needles of each needle bed. The knitted structure can be continuously knitted. It should be noted that the leading yarn generally has one needle bed for each needle bed.
It is sufficient to provide a book, but if this is provided for each needle bed, a knitting yarn for knitting the knitted fabric is switched during knitting, or without interrupting a series of knitting work, The operation of replacing the yarn bobbin for supplying the knitting yarn can be performed.

If the front and rear needle beds can be opened and closed or can be relatively moved in the longitudinal direction, the length of the inserted yarn can be arbitrarily set between the two knitted fabrics. The insertion thread is
It connects the knitted fabrics knitted by the front and rear needle beds,
Therefore, the length of the inserted yarn between each knitted fabric can be determined by the relative distance of the knitting needles corresponding to the predetermined stitch pitch on the front and rear needle beds. However, when the interval between the needle beds is widened, the secondary yarn inlet can take an optimal position alternately with respect to each needle bed in order to reliably capture the inserted yarn via the knitting needles of each needle bed. It is preferable to be able to move back and forth.

If a pressing member is attached to each needle bed, the pressing member presses down and bends the inserted yarn between the auxiliary yarn inlet and each needle bed, so that the interval between the needle beds is not widened. The length of the inserted yarn between the knitted fabrics can be lengthened, and the length of the inserted yarn can be freely changed by adjusting the depth of the insertion. For example, the push-down member tilts it left and right and pushes it down,
The length of the inserted yarn can be continuously changed in the horizontal direction of each knitted fabric, and the length of the inserted yarn can be changed in the vertical direction of each knitted fabric by continuously changing the pressing depth in the knitting process. Can be smoothly changed. In addition, the pressing member can smoothly change the length of the insertion yarn in the lateral direction of each knitted fabric by curving downward or upward. It is possible to knit various knitted structures.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

The knitted structure body is composed of a pair of front and rear knitted fabrics A, A, and a plurality of insertion yarns B connecting the knitted fabrics A, A (FIGS. 1 and 2). However, FIGS. 1B and 1C are views corresponding to the arrow X and the view Y, respectively, of FIG. 1A.

The knitted fabrics A, A are knitted in a flat knitting structure by knitting yarns F independent of each other. However, reference numerals Fa and Fb in FIG. 2 denote knitting yarns F in the case where stitches are formed in the lateral direction of the knitted fabric A (in the direction of arrow C in FIG. 1), for example, from left to right and from right to left. Is shown.

Each of the insertion yarns B is arranged in the longitudinal direction of the knitted fabrics A, A (FIG. 1).
(In the direction of arrow W). The insertion yarns B are arranged at a predetermined stitch pitch P1 with respect to each knitted fabric A, and are alternately bent and connected with each knitted fabric A at a predetermined course pitch P2. Have been.
Each insertion yarn B is connected to the knitted fabric A via a tack (FIG. 2), but may be connected via a knit. Further, each of the insertion yarns B is between the knitted fabrics A, A,
The length L is unified (FIG. 1B).

[0022] The knitted structure body is provided with front and rear needle beds 11 and 11.
And the leading yarn slot 1 for supplying the knitting yarn F to each of the needle beds 11 and 11
The insertion yarns B, B,...
Can be knitted by a knitting device having a common auxiliary yarn inlet 13, 13... The knitting device referred to here is, for example, Japanese Patent Publication No. 1-128.
It is configured based on a carriageless type flat knitting machine as described in Japanese Patent No. 55-55.

On each needle bed 11, a large number of knitting needles 11a, 11a... Are arranged for each minimum stitch pitch Po of the knitted fabric A (FIGS. 2 and 3). However, FIG.
In contrast, only one knitting needle 11a is shown. Therefore, each needle bed 11 moves the main yarn guide 12 to the left and right, and drives the knitting needles 11a, 11a...
The knitted fabric A can be knitted via the knitting yarn F from 2. However, the knitting needles 11a, 11a... For example, when the leading yarn slot 12 is moved from left to right, only the odd-numbered needles are sequentially driven to form a stitch by the knitting yarn F as shown by a symbol Fa in FIG. And the leading thread 1
When moving 2 from right to left, it is assumed that only the even-numbered stitches are sequentially driven to form a stitch by the knitting yarn F as indicated by reference numeral Fb in FIG.

The secondary yarn guides 13, 13,...
Are arranged in a line at a predetermined stitch pitch P1 on the common support member 13a above the middle portion of the intermediate stitch (FIG. 4). In addition, a nozzle 13b is attached to a lower portion of each auxiliary yarn guide 13 via a spring 13c. Support material 13a
Can be reciprocated right and left via a drive mechanism (not shown) (in the directions of arrows K1 and K2 in FIG. 4).
The nozzle 13b of each auxiliary yarn inlet 13 crosses the tip of the knitting needle 11a driven to the tack position, and can cross the knitting needle 11a left and right while bending obliquely via the spring 13c.

Then, each of the auxiliary yarn guides 13 passes the tip of the knitting needle 11a at the welt position in one direction while pulling the insertion yarn B (in the direction of arrow K1 in FIG. 5A).
The knitting needle 11a is driven to the tack position (FIG. 7 (B)), and is returned in the opposite direction to get over the knitting needle 11a (in the direction of arrow K2 in FIG. 9 (C)). The nozzle 13b of the auxiliary yarn inlet 13 bends obliquely via a spring 13c when passing over the knitting needle 11a (see FIG. 2C). (A broken line), and returns to a normal linear state by climbing over the knitting needle 11a (solid line in the figure), provided that the spring 13c and the nozzle 13b are made of rubber, for example, as long as they can get over the knitting needle 11a left and right in this way. It is also possible to substitute a flexible hollow pipe material having elasticity such as a tube.

The front and rear needle beds 11, 11 respectively knit the knitted fabric A by operating the knitting needles 11a, 11a... Relatedly, the insertion yarn B can be connected to the knitted fabric A by operating the specific knitting needles 11a, 11a,... For each stitch pitch P1 corresponding to each sub-yarn opening 13 (FIGS. 2, 6). . However, FIG. 6A shows an even-numbered knitting needle 11a corresponding to a predetermined stitch pitch P1,
11a, the leading yarn 12 is moved from left to right, and the odd-numbered knitting needle 11 is moved.
This shows a state in which a stitch of one course of the knitted fabric A is formed via a, 11a,.

At this time, the secondary yarn guides 13, 13,...
After the step of FIG. 5 (D) is completed, prior to driving the leading yarn slot 12, the insertion yarn B is retracted to the position of the even-numbered knitting needles 11a, 11a,.
Interference with odd-numbered knitting needles 11a, 11a,... FIG.
(B) shows a state in which the leading yarn thread 12 is moved from right to left following FIG. (A), and the next one stitch of the knitted fabric A is formed via the even-numbered knitting needles 11a, 11a,. As shown in FIG.
Prior to driving the second knitting needle 2, the odd-numbered knitting needles 11a, 11
are retracted to the position a.

Therefore, the secondary yarn guides 13, 13,...
By repeating the procedure of (A) and (B) a predetermined number of times, each time the front and rear knitted fabrics A and A are knitted at the predetermined course pitch P2 via the front and rear needle beds 11 and 11, respectively, the front and rear knitted fabrics A and A are knitted. Insertion yarns B, B via knitting needles 11a, 11a.
Are alternately tucked, and the insertion yarns B, B,... Are alternately connected to the front and rear knitted fabrics A, A,.

Each needle bed 11 is provided with a pressing member 14 (FIGS. 3 and 7).

The pressing member 14 is connected to the needle bed 11 and the secondary yarn guide 1.
, 13, 13..., And are lowered so as to move downward in parallel via driving members 14 a, 14 a connected to both ends, whereby one of the knitted fabric A and the auxiliary yarn inlet 13, 13 are pushed down all at once, and the insertion yarns B, B.
3, 13... Side (FIG. 8). That is, the pressing member 14 is lowered by a predetermined pressing depth, so that the insertion yarns B, B,.
Can be freely controlled. However, the pressing member 14 is connected to the auxiliary yarn guides 13, 13,.
Immediately after driving to the predetermined position shown in FIG. 5A, it is pushed down to a predetermined pushing down depth, and through FIGS. 5B to 5D, each knitting needle 11a tacks the inserted yarn B and the secondary yarn inlet 13,
13 are returned to the upper standby position immediately after returning to the predetermined position in FIG.

The knitting needle 11a of FIG. 8 is the same as the knitting needle 1 of FIG.
Like FIG. 1a, the knitting needle on the side where the insertion yarn B is to be tacked is shown. That is, the pressing members 14, 14 attached to the front and rear needle beds 11, 11, respectively, connect the insertion yarns B, B... To the knitted fabric A on the opposite needle bed 11, respectively. …
Can be restricted.

In the above description, the knitted fabrics A may have any knitting structure other than the flat knitting structure. Also, the stitch pitch P1, which connects the insertion yarns B, B ... to each knitted fabric A,
The course pitch P2 can take any pitch other than that shown in FIG. Further, the stitch pitch P1 and the course pitch P2 are not only kept constant during the knitting process of the knitted structure, but may be arbitrarily changed.

[0033]

[Other Embodiments] The procedure for connecting the insertion yarn B to each knitted fabric A may be as shown in FIG. 9 instead of FIG. That is, each of the auxiliary yarn guides 13 drives the corresponding knitting needle 11a to the tack position (FIG. 9 (A)), and moves over the knitting needle 11a (in the direction of arrow K1 in FIG. 9 (B)).
By returning a to the welt position, the inserted yarn B can be captured (FIG. (C)). According to the procedure of FIG. 5, the insertion yarn B is connected to the knitted fabric A in a twisting tack style (FIG. 5 (D)), but according to the procedure of FIG. 9, it is connected by a normal tack. (FIG. 9 (C)). In addition,
5 and 9, the knitting needle 11 when catching the insertion yarn B is shown.
a may be driven to the knitting position instead of driving to the tack position. At this time, the inserted yarn B can be connected to the knitted fabrics A, A via the knit.

The pressing member 14 includes driving members 14a, 14
It is preferable to move the servo motor 14b downward in parallel via the servo motors 14b and 14b connected to a (FIG. 10A). The pressing depth of the pressing member 14 is accurately controlled, and the knitted fabrics A, A
This is because the length L of the insertion yarns B, B,... Between them can be controlled more accurately. However, the push-down member 14 may be tilted left and right and lowered instead of being moved downward in parallel (FIGS. (B) and (C)). Each knitted fabric A
The length L of the insertion yarns B, B... The pressing member 14 is
By bending upward or downward instead of straight, the length L of the insertion yarns B, B... Can be continuously changed in the same direction.

The length L of the insertion yarns B, B,... Between the knitted fabrics A, A is changed by using the knitted fabrics A, A on the front and rear needle beds 11, 11, instead of using the pressing members 14, 14. By offsetting the knitting position to the left and right, a predetermined long dimension can be easily realized (FIG. 11A). This is because the length L can be arbitrarily increased by increasing the offset amount L1 of the knitting positions of the knitted fabrics A. Although the effective knitting width of each knitted fabric A is reduced, there is an advantage that a standard type flat knitting machine can be used as it is. If the front and rear needle beds 11, 11 themselves can be relatively moved in the longitudinal direction (FIG. 2B), a larger offset amount L1 is realized, and the length L of the insertion yarns B, B,. can do.

Further, the front and rear needle beds 11, 11 may be opened and closed at an interval L2 between each other (FIG. 12). By increasing or decreasing the interval L2, the insertion yarn B between the knitted fabrics A
Can be set arbitrarily. The knitting needles 11 on the front and rear needle beds 11 and 11 are mounted on a movable base 13d which can reciprocate in the front and rear direction in which the needle beds 11 and 11 open and close.
It is preferable to alternately move the insertion yarns B, B... to optimal positions for capturing the insertion yarns B, B.

In FIGS. 11 and 12, it goes without saying that the pressing members 14, 14 may be used together.

The knitted structure can be knitted into various forms by changing each knitting parameter (FIG. 1).
3 to 21). However, each figure (B), (C) is a figure equivalent to the X arrow of each figure (A), and a figure equivalent to the Y arrow, respectively. Indicate insertion yarns B, B... Arrows C and W indicate the horizontal and vertical directions of the knitted fabrics A and A, respectively.

FIG. 13 shows an example in which the stitch pitch P1 and the course pitch P2 for connecting the insertion yarns B, B... To the knitted fabrics A, A in FIG.

FIG. 14 shows an example in which the length L of the insertion yarns B, B ... in the longitudinal direction of the knitted fabrics A, A is continuously reduced. FIG. 15 is an example in which the length L is periodically changed in the same direction. FIG. 16 is a diagram in which the length L is further changed in the horizontal direction of the knitted fabrics A, A in accordance with the same period. This is an example.

FIG. 17 shows that the knitted fabrics A, A and the insertion yarn B,
B ... as the course pitch P2 connecting the inner circumference knitted fabric A
This is an example in which it is set to be small for the outer knitted fabric A and larger for the outer knitted fabric A. FIG. 18 shows knitted fabrics A, A knitted in a fan shape by folding back the leading yarn openings 12, 12 in the course of one knitted fabric A in one course, and connects the inserted yarns B, B. This is an example in which the course pitch P2 is continuously changed so as to be smaller at the inner peripheral portion of each knitted fabric A and larger at the outer peripheral portion.

FIG. 19 is a cross-sectional view of FIG.
This is an example in which the length L is smoothly changed in both the horizontal direction and the vertical direction of the knitted fabrics A. Also, FIG.
7, the knitting width of the knitted fabrics A, A, the length L of the inserted yarns B, B..., And the course pitches P2, P2 on the knitted fabrics A, A are simultaneously and continuously set in the longitudinal direction of the knitted fabrics A, A. This is an example in which the number is increased.

As shown in FIG. 21D, the horizontal direction of the knitted fabrics A, A is divided into two, and the insertion yarns B, B. This is an example in which a knitted structure body is knitted by being alternately connected to A, and the knitted fabrics A, A are bent inward at a middle point in the lateral direction to be three-dimensional.

[0044]

As described above, according to the first aspect of the present invention, by connecting a pair of front and rear knitted fabrics at predetermined stitch pitches and course pitches via a plurality of insertion yarns, Since the insertion yarn can reliably limit the maximum spacing of the knitted fabric over the entire surface of the knitted fabric, it is used as a reinforcing material for the front and back sheet materials when manufacturing airtight bags for pneumatic equipment to which large pressure is applied. There is an excellent effect of being extremely useful.

According to the second invention and the third invention, the first invention
The knitted structure according to the invention can be knitted continuously and very efficiently at a stroke.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a knitted tissue body

FIG. 2 is an organization chart of an enlarged main part of FIG. 1;

FIG. 3 is a configuration diagram of a main part of a knitting device (1)

FIG. 4 is a main configuration diagram of a knitting device (2)

FIG. 5 is an explanatory view of the operation of the knitting device (1).

FIG. 6 is an operation configuration diagram (2) of the knitting device.

FIG. 7 is a configuration diagram of a main part of a knitting device (3)

FIG. 8 is an explanatory diagram (3) of the operation of the knitting device.

FIG. 9 is an operation explanatory view showing another embodiment (1).

FIG. 10 is an operation explanatory view showing another embodiment (2).

FIG. 11 is an operation explanatory view showing another embodiment (3).

FIG. 12 is an operation explanatory view showing another embodiment (4).

FIG. 13 is an explanatory view of a form of a knitted structure (1).

FIG. 14 is an explanatory view of a form of a knitted structure (2).

FIG. 15 is an explanatory view of a form of a knitted structure (3).

FIG. 16 is an explanatory view of a form of a knitted structure (4).

FIG. 17 is an explanatory view of a form of a knitted structure (5).

FIG. 18 is an explanatory view of a form of a knitted structure (6).

FIG. 19 is an explanatory view of a form of a knitted structure (7).

FIG. 20 is a view for explaining the form of the knitted structure (8).

FIG. 21 is an explanatory view of a form of a knitted structure (9).

[Description of Signs] A: Knitted fabric B: Insertion thread P1: Stitch pitch P2: Course pitch L2: Interval 11: Needle bed 11a: Knitting needle 12: Main yarn port 13: Sub yarn port 14: Push-down member

Claims (6)

[Claims] 1. A pair of front and rear knitted fabrics, and a plurality of insertion yarns continuously arranged in the longitudinal direction at predetermined stitch pitches of the knitted fabric, wherein the insertion yarns Characterized in that the knitted structures are alternately connected at predetermined course pitches. 2. Knitting a pair of front and rear knitted fabrics via front and rear needle beds, and a predetermined course pitch of each knitted fabric with respect to front and rear knitted fabrics via front and rear knitting needles corresponding to a predetermined stitch pitch. A method for knitting a knitted structure, comprising alternately connecting a plurality of insertion yarns for each knitting. 3. A front and rear needle bed, a main yarn guide for supplying a knitting yarn to each of the needle beds, and a common auxiliary yarn guide for alternately supplying a plurality of insertion yarns to each of the needle beds. Knitting device for knitting structure. 4. The knitting apparatus for a knitted structure according to claim 3, wherein said needle beds can be opened and closed at an interval therebetween. 5. The apparatus according to claim 3, wherein the needle bed is relatively movable in a longitudinal direction. 6. The knitting of a knitted structure according to claim 3, wherein each of said needle beds is provided with a pressing member for pressing down an insertion yarn from said auxiliary yarn guide. apparatus.