JP2646190B2 - Weaving device for synthetic resin latticed fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for weaving a lattice-like woven fabric using a highly rigid synthetic resin tape for warp and weft.

[0002]

2. Description of the Related Art Grids made of synthetic resin (referred to as power grids or geogrids) shown in FIG. 10 in place of reinforcing steel bars for concrete structures, for example, roads, retaining walls, bridges, building wall materials, etc. Came to be used.
That is, a lattice manufactured to have a wide width of 2 m, 4 m, etc. by using synthetic resin tapes for warp 1 and weft 2 and arranging them at a pitch of 50 mm to form a plain weave and bonding intersections by high frequency heating or the like. It is a woven fabric 3. In addition, the warp 1 and the weft 2 of the above synthetic resin tape have a width of 7 to 15 mm and a thickness of 1.5 to 15 made of ethylene / vinyl acetate copolymer resin.
The tape is a 2.0 mm flat tape. Reference numerals 1a and 2a denote core wires each composed of a polyester fiber filament or a polyacetal fiber filament of several thousand deniers. There is also known a synthetic resin tape in which a weft yarn 2 is simply overlapped on a warp yarn 1 and an intersection thereof is adhered.

[0003] However, since the conventional grid-like woven fabric is manufactured manually by an operator, the productivity is low, and furthermore, the intersection is formed after the warp and the weft are crossed or the weft is put on the warp. The warp and weft warp due to misalignment before moving to the bonding equipment, and the arrangement pitch becomes uneven.Therefore, when used to reinforce concrete structures, there is a problem that the tensile strength in the vertical and horizontal directions varies. there were.

[0004]

According to the present invention, a synthetic resin lattice-like woven fabric 3 having the woven structure shown in FIG. 10 and having less warp and weft curvature and non-uniform pitch can be obtained mechanically and efficiently. It is an object of the present invention to provide a weaving device for manufacturing, and a weaving device capable of bonding the intersection of the warp and the weft immediately after beating.

[0005]

The weaving apparatus of the present invention comprises:
A weaving device for weaving a lattice-like woven fabric using a synthetic resin tape for warp and weft yarns. A warp shedding device makes the lengths of upper and lower yarns approximately equal when forming a shed, and a reed. The shed is formed so as to close the shed at the time of hammering, and is provided with an upper yarn holding bar for holding and bending the upper yarn at the time of forming the shed downward on the reed side of the weave front, and the weft insertion device is provided with a weft holding device. A rapier band having a gripper fixed to the tip is inserted from one side of the shed into the shed along the gripper guide in the shed, and the weft supply device provided on the opposite side of the shed is used to insert the rapier band into the gripper. The leading end of the weft is clamped, the weft is inserted by retreating the rapier band, and the weft is cut on the opposite side of the shed. Passes below the upper thread presser bar during beating Characterized in that it is low formed to cut.

[0006] The above-mentioned weaving device includes a bonding device capable of holding and intersecting the intersection of the warp and the weft reaching the weaving front by beating from above and below, for example, a high-frequency or ultrasonic welding device. Can be provided.

In the heald used in the shedding apparatus, a pair of upper and lower guide rollers are rotatably mounted between a pair of left and right flat plates which are long in the vertical direction so that the shafts are oriented in the width direction. It is preferable to form a gap into which a synthetic resin tape can be inserted. By using this heald, the resistance when the warp passes through is greatly reduced.
The type of movement of the warp in the shedding device is that the shed is closed at the time of beating, the upper thread and the lower thread are aligned almost in parallel, and the height of the warp when closed is lower than the upper thread when the shed is formed. As long as it is an upper shed or a middle shed, the upper shed is preferable in terms of easy handling.

The gripper in the above-mentioned weft insertion device is preferably provided with a spring for urging the weft holding portion of the gripper to always close in order to securely hold the heavy weft, and is fixed to the tip of the rapier band. The bar-shaped substrate and a lever that swingably supports an intermediate portion with respect to a fulcrum on the bar-shaped substrate, and a weft holding portion can be formed by the rod-shaped substrate and the tip of the lever.

The weft supply device includes a pull-out roller for pulling out the weft from the weft bobbin, a nozzle guide for slidably holding the leading end of the weft drawn by the pull-out roller, and a nozzle-like guide from the nozzle guide to the warp side. It is preferable to comprise a weft cutter for cutting the extending weft, and opening means for opening the weft holding portion of the gripper on the warp side of the weft cutter against the bias of the spring, and the rapier band is retracted. By rotating the pull-out roller occasionally in conjunction with this, the heavy weft is prevented from coming off the gripper, and weft insertion is further facilitated. The releasing means may be a pressing device for pressing the lever of the gripper downward on the opposite side of the weft holding portion, and the pressing device may include the weft holding device for holding the weft. An air cylinder or an electromagnet is preferred in terms of reliability when opening the part.

In addition, between the drawing roller and the nozzle guide, a weft end cut by a weft cutter and projected from the nozzle guide is temporarily retracted into the nozzle guide until the next weft insertion. A weft pull-back device can be provided, in which case the weft end protruding from the nozzle-shaped guide can be prevented from hanging after cutting the weft, and the gripper can easily grip the leading end of the weft during the next weft insertion. .

[0011]

When a warp forms a shed, a rapier band is inserted into the shed from one side, runs along a gripper guide in the shed, holds the weft end on the opposite side of the shed, and then pulls the rapier band back. This causes the weft to be inserted and the weft to be cut on the opposite side. Next, when the above-mentioned shed is closed, the reed moves forward and the weft sandwiched between the upper thread and the lower thread is carried to the weaving front. Hereinafter, the above-described warp shedding movement, weft insertion movement and beating movement are repeated in order, and this includes a known warp feeding movement, adjustment of the warp tension by swinging the backrest,
A winding motion or the like in front of the weaving front is added, and the weaving proceeds, so that the synthetic resin lattice-like fabric 3 shown in FIG. 10 is obtained. And when the bonding device is provided at the position of the weave front,
Since the intersection of the warp and the weft reaching the weave front by beating is immediately bonded, misalignment does not occur in subsequent winding.

In the present invention, since the lengths of the upper thread and the lower thread at the time of forming the shed are substantially equal, the warp tensions are evenly arranged. In addition, the upper thread is held down by the upper thread presser bar, and this upper thread does not push up the weft of the weaving front that was inserted last time, so abnormal tension is applied to the weft or the edge of the weft that intersects with the warp. There is no turning over.
Since the upper end of the reed is formed at the free end, the warp can freely move up and down between the free ends of the reed to form a shed. In addition, since the rapier band runs along the gripper guide in the shed, the long rapier band falls and can safely reciprocate in the shed without touching the lower thread. In addition, since the weft is inserted when the rapier band is pulled back, the rapier band is surely inserted without buckling even though the weft is heavy.

Further, since the upper end of the reed wing of the reed is formed to have a low height so that it can pass below the upper thread presser bar, the reed can be beaten without bringing the reed into contact with the upper thread presser bar. can do. In addition, since the shed is closed and the upper thread and the lower thread are beaten in a state where they are aligned substantially in parallel, an appropriate sliding resistance acts on the weft, and the weft is held in a straight straight line. Therefore, the weft can be laid on the weave front in a straight line in the width direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 denotes a warp bobbin on which a warp 1 made of the above-mentioned synthetic resin tape is wound. A large number, for example, 41, of the warp bobbins 10 are creels (not shown) at the rear of a loom. It is arranged in multi-row and multi-stage on top, 41
The warp yarns (width 9 mm) 1 are arranged in parallel at a pitch of 50 mm and sent to a nip portion of a feed roller 11 in front and a pressing roller 12 in contact with the lower surface thereof. The holding roller 12 is provided with a swing lever 13 having a support shaft 13a as a fulcrum.
And is urged by a spring 14 at the other end to be pressed against the lower surface of the feed roller 11. On the other hand, the feed roller 11 is connected to a delivery lever 17 on a delivery shaft 16 below via a delivery wrapping transmission means 15 and a one-way clutch (not shown). It rotates intermittently in the direction of arrow A due to the swing.

A whip roller 18 for adjusting the warp tension is provided in front of the feed roller 11. The whip roller 18 is a swing lever 1 fixed to a support shaft 19a.
9 attached to one end and attached to the other end
Urges in a clockwise direction (arrow B direction). Then, the whip roller 18 swings by driving a V-shaped lever 22 on the lower front side thereof via a downward arm 21 fixed to a support shaft 19a. The mounting height of the whip roller 18 is such that when the warp 1 forms the shed, the weft rollers 18 of the upper thread 1A and the lower thread 1B move from the weave front (the upper thread 1A).
And the lower thread 1B intersect at the front).

The V-shaped lever 22 is provided with a first lever 22.
a and a support shaft 23 at the intersection of the second lever 22b,
The roller 24 provided on the first lever 22a is fixed to the rear drive shaft 25, and is rotated counterclockwise (direction of arrow C) each time weft insertion is performed.
By making contact with the rear cam 26 which makes one rotation, the weft reciprocates one time back and forth for each weft insertion. Then, the first lever 22
a is connected to the tip of the delivery lever 17 below the feed roller 11 via the first connecting rod 27,
The tip of the second lever 22b is connected to the arm 21 below the whip roller 18 via the second connecting rod 28.

Therefore, each time the weft is inserted, the roller 24 comes into contact with the convex portion of the rear cam 26 and the feed roller 11
Rotates to feed the warp 1 forward. When the warp 1 is slackened, the whip roller 18 faces upward (in the direction of arrow B).
To stop at a position balanced with the warp 1 tension. Further, when the tension of the warp yarn 1 is large and the roller 24 is in contact with the small diameter portion of the rear cam 26, the feed amount of the feed roller 11 becomes large, and the whip roller 18 which has been lowered up to that point rises, and 1 tension and swing lever 1
9 stops at a position where the resilience of the spring 20 at the other end balances. The second lever 22b of the V-shaped lever 22 and the second connecting rod 28 are connected via compression coil springs 29a and 29b for absorbing shock.

The rear drive shaft 25 is connected to a front intermediate shaft 31 by a winding transmission device 30 for delivery, and the intermediate shaft 31 is connected to a main shaft 33 by a winding transmission device 32 for intermediate connection. The main shaft 33 is connected to a drive motor 35 by a main shaft wrapping transmission means 34 which is lowered forward, and to an opening camshaft 37 by a forward opening wrapping transmission means 36. 38 is fixed. And
Rear drive shaft 25, intermediate shaft 31, and cam shaft 37 for opening
Is the same counterclockwise direction as the main shaft 33 (arrow C direction)
To rotate. However, the rear drive shaft 25 and the intermediate shaft 31
Rotates at the same speed as the main shaft 33, and the opening cam shaft 37
Rotates at half the speed of the main shaft 33.

Above the main shaft 33 (see FIG. 9),
A plurality of heald frames 40 are provided so as to be able to move up and down, and a link lever mechanism 39 is connected to the lower end of the heald frame 40. The lower end of the link lever mechanism 39 is attached to the lower surface of the opening cam 38 via a roller 39a. Touch With the rotation of the opening cam 38, the front and rear two heald frames 40, 40
Rises alternately from the position of the lower thread 1B (see FIG. 1) for each weft insertion to form an upper shed 1C. The opening cam 3
8 and the link lever mechanism 39 are connected to the front heald frame 40.
, And the illustration for the rear heald frame 40 is omitted.

The above-mentioned heald frame 40 (see FIG. 2) is formed in a horizontally long rectangle by upper and lower horizontal frames 40a and left and right vertical frames 40b, and the upper end of the link lever mechanism 39 is attached to the lower horizontal frame 40a. Be linked. Then, guide plates 41 and 42 are fixed to the upper and lower sides of the left and right vertical frames 40b so as to protrude sideways.
The side edges of the upper and lower guide plates 41, 42 fit into the grooves of the upper and lower grooved guide rollers 43, 43 attached to the side frame (not shown) of the loom, and the opening cam 3
With the rotation of 8, it moves up and down together with the heald frame 40. Also,
A large number of healds 44 are fixed between the upper and lower horizontal frames 40a, 40a at a pitch of 100 mm, which is twice the pitch of the warp 1 in the lattice fabric 3 of the product.

The heald 44 is, as shown in FIG.
A pair of upper and lower guide rollers 46, 47 are rotatably mounted between a pair of left and right flat plates 45, 45 which are long in the vertical direction so that their shafts face the width direction. Thus, a gap is formed in which the insertion of one is possible. In this embodiment, the upper guide roller 46 has left and right flanges 46a, and the lower guide roller 47 is formed to have a width between the left and right flanges 46a, 46a.

A fixed beam 50 (see FIGS. 1 and 5) in the width direction is provided above the middle of the heald frame 40 and the cloth front (the portion where the upper thread 1A and the lower thread 1B intersect). An upper thread presser bar 52 that is long in the width direction is fixed to a front edge of the lower surface of the first through a connection fitting 51. The upper thread presser bar 52 presses and bends the upper thread 1A downwardly at a position slightly behind the reed front (reed side) when the shed is formed.

FIG. 4 is an overall front view of the rapier type weft insertion device. A swinging wheel 56 for driving a rapier band is provided on the right side of the shed 1C. An arc-shaped band guide 57 is provided so as to surround it, a band storage tube 58 curved upwardly in a mountain shape, and a lower surface guide 59 in the width direction are provided on the lower side opposite thereto, and are drawn out from the band storage tube 58. The rapier band 60 is inserted between the oscillating wheel 56 and the band guide 57 from above the oscillating wheel 56 and makes a half turn around the oscillating wheel 56,
It extends from the lower surface to the left shed 1C side along the upper surface of the lower surface guide 59.

The gripper 61 at the tip of the rapier band 60
As shown in FIG. 7, a rod-shaped substrate 62 fixed to the tip of the rapier band 60 and a lever 63 whose center is swingably supported by a support shaft 62a on the rod-shaped substrate 62 are provided. The leading end (left end in FIG. 7) of the lever 63 forms a weft holding portion 63a, and a compression coil spring 64 is mounted on the rear end thereof. The compression coil spring 64 urges the weft holding portion 63a in a direction in which it is always closed. As shown in FIG. 4, a gripper opening air cylinder 65 is provided above the lower surface guide 59. When the piston rod projects downward, the lever of the gripper 61 whose tip reaches the lower surface guide 59 is provided. The rear end of 63 is pushed down to open the weft holding portion 63a.

In FIG. 4, a weft bobbin 66 wound with the weft 2 made of the above-mentioned synthetic resin tape is rotatably supported on the left side of the shed 1C.
7 is provided, and a pressing roller 68 is pressed against the upper surface thereof. As shown in FIG. 7, the pressing roller 68 is attached to a pressing lever 69 having a right support shaft 69a as a fulcrum.
Is biased downward. Then, the pressing roller 68
The weft yarn 2 is held between the nip portions of the pull-out roller 67 and is pulled out by the clockwise rotation of the pull-out roller 67.

The right support shaft 71a of the pressing roller 68
A moon-shaped roller 71 is rotatably mounted on the rotator. The moon-shaped roller 71 has a flat concave portion 71b formed around a disk, has an operating lever 72 fixed integrally, and has a weft air connected to the tip of the operating lever 72. When the cylinder 73 swings by a predetermined angle and the piston rod of the air cylinder 73 is retracted as shown in the drawing, the concave portion 71b faces left and the piston rod projects (see FIG. 8). The above-mentioned concave portion 71b
Faces directly below. A pressing roller 74 is provided below the moon-shaped roller 71, and a pressing lever 75 to which the pressing roller 74 is attached is moved by a spring 7.
By being urged at 6, the lower surface of the moon-shaped roller 71 is pressed. However, when the concave portion 71b of the moon-shaped roller 71 faces directly below, the stopper 77 comes into contact with the swing lever 75 to limit the rise of the pressing roller 74, and the concave portion 71b
A gap through which the weft yarn 2 can pass is formed between b and the pressing roller 74.

The above-mentioned moon-shaped roller 71 and operating lever 72
A series of devices including the pressing roller 74 and the like constitute a weft pulling-back device. When the piston rod is retracted in the state of FIG. 8 and the moon-shaped roller 71 rotates clockwise through the operating lever 72, the device shown in FIG. , Moon-shaped roller 7
1 and the pressing roller 74 nip the weft 2 between them, and pull back the right weft 2 in the nip by a predetermined length to the left.

In FIG. 7, a nozzle guide 78 for guiding the weft yarn 2 to the right of the nip between the moon-shaped roller 71 and the holding roller 74, and a weft yarn 2 projecting rightward from the nozzle guide 78 are provided. A weft cutter comprising an upper blade 79 and a lower blade 80 for cutting is provided. The upper blade 79 is on the piston rod of the upper upper blade air cylinder 81, and the lower blade 80 is on the lower lower blade air cylinder 82. Are fixed to the respective piston rods. A gripper opening air cylinder 83 is provided on the right side of the weft cutters 79 and 80.
Is provided. This gripper opening air cylinder 83
Is the same as the gripper opening air cylinder 65 on the right side of the shed 1C, and when the piston rod projects,
The weft holding portion 63a of the gripper 61 located below is opened.

As shown in FIG. 4, a weft motor 85 is provided below the center of the shed 1C, and its motor shaft is composed of a weft winding transmission means 86, an upper right rapier drive shaft 87, and a set of bevel gears. The oscillating wheel 56 is connected to the oscillating wheel 56 via a wrapping transmission means 89 for a rapier. And
The rapier drive shaft 87 is connected to the left pull-out drive shaft 91 via a left-end one-way clutch 90, and the pull-out drive shaft 91 is connected to the pull-out drive shaft 93 via a set of bevel gears 92 and pull-out wrapping transmission means 93. It is connected to a roller 67. Therefore, when the weft motor 85 is driven and the rapier drive shaft 87 rotates in the direction of arrow D, the swinging wheel 56 rotates clockwise, pulls out the rapier band 60 from the band housing cylinder 58, and enters the shed 1C. On the contrary, the rapier drive shaft 87 is driven by the arrow E by driving the weft motor 85.
In this case, the swinging wheel 56 rotates counterclockwise to return the rapier band 60 to the band housing cylinder 58, and the rotation of the rapier drive shaft 87 in the direction of the arrow E causes the pull-out drive shaft 91 to rotate through the one-way clutch 90. And the pull-out roller 67 rotates clockwise to pull out the weft yarn 2 from the weft bobbin 66. The weft yarn motor 85 may be omitted, and the swing wheel 56 and the rapier drive shaft 87 may be rotated by the transmission from the main shaft 33.

The shed 1C is provided with a gripper guide 95 as shown in FIGS. That is,
A connection fitting 96 is provided on the back of the fixed beam 50 (see FIG. 5).
A support bar 97 which is long in the width direction is fixed via the support bar 97, and a plurality of guide fittings 98 formed in a strip shape at the same pitch as the warp 1 are fixed on the front and rear surfaces of the support bar 97 in a hanging manner. The portion is inserted into the shed 1C through the space between the upper thread 1A, and the edge of the rapier band 60 is slidably fitted into the widthwise guide groove 98a provided at the lower end of the facing surface of the front and rear guide fitting 98. The rapier band 60 is guided horizontally.

As shown in FIGS. 5 and 6, a reed 100 for beating uses a large number of reed wings 1 each having an upper end formed at a free end.
00a at a pitch equal to the mounting pitch of the guide bracket 98, the height of the reed 100a is formed lower than the lower end of the upper thread presser bar 52, and a rib 100b in the width direction protrudes from the front surface thereof. Have been. And the above reed 1
00 is a cart 10 fixed to the lower surface as shown in FIG.
A link 103 is mounted on a horizontal guide rail 102 in the front-rear direction via 1 and is connected to the back of the reed 100 and extends rearward. The link 103 is connected to the rear end of the link 103 and has a lower support shaft 104a as a fulcrum. The beating lever 104 and the beating cam 105 contacting the roller at the lower end of the beating lever 104 reciprocate back and forth by the rotation of the main shaft 33 to which the beating cam 105 is fixed. Weft 2
To the right Orifront.

The reed 100 at the position of the cloth front indicated by the chain line in FIG.
An electrode support plate 106 long in the width direction is installed below the front surface of each of the plurality of lower electrodes 107, and a plurality of lower electrodes 107 project from the upper surface thereof at an arrangement pitch of the warps 1. On the other hand, a plurality of electrode air cylinders 108 arranged in the width direction are
8a are placed side by side with the electrode support plate 1
The upper electrode 110 long in the width direction is fixed to face the row of the lower electrodes 107 via 09. This upper electrode 11
0 lowers after the weft 2 is beaten, and the lower electrode 10
7 and high-frequency fusion with the intersection of warp 1 and weft 2 interposed therebetween.

In FIG. 1, the high-frequency electrodes 107, 1
An ear cutter 111 for cutting and aligning the weft 2 protruding from the ear end of the lattice-like woven fabric 3 having a plain weave structure composed of the warp 1 and the weft 2 is provided in front of 10. The ear cutter 111 includes a receiving plate 112 fixed below the outer side of the warp yarns 1 at both ends in the width direction, a disk cutter 113 rotating in contact with the upper surface thereof, a wrapping transmission means 114 for driving the same, and a cutter motor. 115.

A take-up roller 116 is provided in front of the ear cutter 111 for taking out the lattice-like fabric 3, and a nip roller 117 is pressed against the lower surface thereof. Then, the above-mentioned take-up roller 116 is used for the beating lever 10.
4 and is intermittently rotated clockwise (in the direction of arrow F) by the weft pitch. In other words, the support shaft 104a fixed to the beating lever 104 is moved downward through the swinging winding transmission means 118, the swing arm 119, the lower connecting rod 120, the ratchet mechanism 121, and the take-up winding transmission means 122. The take-up roller 116 is connected. In addition, on the surface of the take-off roller 116, a number of projections are provided which fit into the weave of the lattice-like fabric 3 (a rectangular space surrounded by the warp 1 and the weft 2). Slip can be prevented and takeover can be further ensured.

In the above structure, the rollers 39a (see FIG. 9) corresponding to the two front and rear heald frames 40 are both in contact with the lower surface of the small diameter portion of the opening cam 38, and the entire warp 1 is the lower thread 1B.
When the drive motor 35 (see FIG. 1) is driven and the main shaft 33 rotates in the direction of arrow C,
The rear drive shaft 25 and the opening cam shaft 37 rotate in the direction of arrow C, respectively. Then, when the roller 39a corresponding to the front heald frame 40 comes into contact with the large-diameter portion of the cam 38 for opening by the rotation of the cam shaft 37 for opening, the front heald frame 40 becomes the height of the upper thread 1A as shown in the figure. At the same time, the shed 1C is formed, and at the same time, the large diameter portion of the rear cam 26 on the rear drive shaft 25 pushes the V-shaped lever 22 backward, rotates the feed roller 11, and feeds the warp 1 forward by a predetermined length. At the same time, the whip roller 18 is pushed up to remove the slack of the warp 1.

Next, the rapier drive shaft 87 is rotated in the direction of arrow D by the driving of the weft motor 85 (see FIG. 4), whereby the swing wheel 56 is rotated clockwise and the rapier band 60 is sent out. Gripper 61 and rapier band 60 are gripper guides 9 in shed 1C.
5 to the opposite side of the weft supply device. In this weft supply device, as shown by a solid line in FIG. 7, the weft 2 passed through the nozzle-shaped guide 78 retracts its tip and stands by. When the gripper 61 arrives below the gripper opening air cylinder 83 on the right side of the nozzle-shaped guide 78, the weft motor 85 stops once, and the piston rod of the air cylinder 83 descends to gripper The weft holding portion 63a is opened, and at the same time, the piston rod of the weft air cylinder 73 protrudes (see FIG. 8) so that the concave portion 71b of the moon-shaped roller 71 faces downward. The weft 2 which has been curved by the elasticity returns straight to the nozzle guide 78.
Of the air cylinder 83
Is retracted, and the weft holding portion 63a is closed, so that the weft holding portion 63a is held by the gripper 61.

Then, when the rapier drive shaft 87 rotates in the direction of arrow E due to the reverse rotation of the weft motor 85 (see FIG. 4), the oscillating wheel 56 starts to rotate counterclockwise, and the gripper 61 and the rapier band 60 are rotated. The above shed 1C
Is guided by the gripper guide 95 in the inside and starts retreating.
At the same time, the rapier drive shaft 87 is connected to the pull-out drive shaft 91 by the one-way clutch 90, and the pull-out roller 67 rotates clockwise to draw out the weft yarn 2, which is passed through the shed 1C and inserted into the weft. And when weft insertion ends,
As shown in FIG. 9, the roller 3 corresponding to the front heald frame 40
9a contacts the small diameter portion of the opening cam 38, the front heald frame 40 descends, the upper thread 1A (see FIG. 1) descends to the height of the lower thread 1B, and the shed 1C is closed.

The shed 1C is closed, and the upper thread 1A and the lower thread 1B
When the weft yarn 2 is sandwiched between them, on the supply side of the rapier band 60 (see FIG. 4), the piston rod of the air cylinder 65 for the gripper protrudes, the weft holding portion 63a of the gripper 60 is opened, and the leading end of the weft 2 is gripped by the gripper 60. Released from.
On the other hand, on the other side (see FIG. 7), the upper blade air cylinder 8
1 and the piston rod of the lower blade air cylinder 82 project, and the upper blade 79 and the lower blade 80 cut the weft 2 extending rightward from the nozzle guide 78. The chain line in FIG. 7 shows the weft 2 immediately after the cutting. When the above-mentioned cutting is completed, the lubricating roller 71 rotates clockwise by a predetermined angle by the operation of the weft air cylinder 73, and at this time, the lower pressing roller 7
4, the weft 2 is nipped and pulled to the left, and its tip is retracted from the nozzle-shaped guide 78 to prevent the tip of the weft 2 from hanging down.

When both ends of the inserted weft yarn 2 are released (see FIG. 1), the large diameter portion of the beating cam 105 on the main shaft 33 causes the beating lever 104 to swing clockwise.
The reed 100 passes from below the upper thread presser bar 52 under the lower thread presser bar 52, and sends the weft 2 sandwiched between the upper thread 1A and the lower thread 1B with the shed closed to the front of the upper thread presser bar 52. When the front end of the forward stroke, that is, the cloth front, is reached, the electrode air cylinder 108 located above the cloth front is actuated, and the upper electrode 110 at the standby position is lowered to cross the intersection of the warp 1 and the weft 2. The upper and lower high-frequency electrodes 110 and 107 are fused together. Then, the reed 100 retreats.

When the reed 100 moves forward, the lower swing arm 119 swings clockwise by the transmission of the beating lever 104 from the support shaft 104a, so that the ratchet mechanism 121 is rotated in the feed direction. , Take-up roller 116
Rotates to take up the lattice-shaped woven fabric 3 by the pitch of the weft yarn 2. Then, the fused portion of the weaving front is cooled before reaching the take-up roller 116, and both ends of the fused weft 2 are cut by the ear cutter 111 in the middle thereof.

[0041]

As described above, according to the first aspect of the present invention, it is possible to weave a lattice-like woven fabric comprising a warp and a weft of a synthetic resin tape. In addition, since the lengths of the upper thread and the lower thread at the time of forming the shed are almost equal, the warp tensions are made uniform, and the upper thread is pressed by the upper thread presser bar. As the rapier band runs along the gripper guide inside the shed, the long rapier band does not fall and touch the lower thread, and is inserted when the rapier band is pulled back. Therefore, despite the heaviness of the weft, the weft is inserted reliably, and the height of the reed wing is formed low enough to pass below the upper thread presser bar. The reed can be beaten without contacting the reed, and the shed is closed and the reed is beaten in a state where the upper thread and the lower thread are aligned almost in parallel. Straight straight line Held, therefore, it is possible to lay the weft in the width direction of a straight linearly weave front.

According to the second aspect of the present invention, since the intersection of the warp and the weft is bonded immediately after the beating, misalignment can be completely prevented in the subsequent winding movement. Further, according to the third aspect of the invention, the resistance when the warp passes through the heald can be greatly reduced, and the warp distortion can be reduced. The invention described in claim 4 is:
The upper thread and the lower thread can be easily set to the same length, and handling becomes easy. In the invention described in claim 5, since the pull-out roller can be rotated in conjunction with the retraction of the rapier band, the heavy weft can be prevented from coming off the gripper, and the weft insertion can be further facilitated.
In addition, the invention described in claim 6 prevents the weft end protruding from the nozzle-shaped guide from hanging after weft cutting,
In the next weft insertion, the gripper can more reliably hold the leading end of the weft yarn.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a front view of a heald frame.

FIG. 3 is an enlarged view of a main part of the belt.

FIG. 4 is a front view of the weft insertion device.

FIG. 5 is a side view of the gripper guide.

FIG. 6 is a front view of the gripper guide.

FIG. 7 is a front view of the weft supply device when the weft is pulled in.

FIG. 8 is a front view of the weft supply device when the weft is clamped.

FIG. 9 is a side view of the beating apparatus.

FIG. 10 is a perspective view of a lattice fabric.

[Explanation of symbols]

1: warp, 1A: upper thread, 1B: lower thread, 1C: shed, 2:
Weft, 3: lattice-like fabric, 10: warp bobbin, 11: feed roller, 18: whip roller, 22: V-shaped lever, 40: heald frame, 38: cam for opening, 52: upper thread presser bar, 56: swing Moving wheel, 58: band storage tube,
60: rapier band, 61: gripper, 63a: weft holding portion, 65, 83: air cylinder for gripper opening, 6
6: weft bobbin, 67: pull-out roller, 71: moon-shaped roller, 71b: concave, 74: holding roller, 78: nozzle guide, 79, 80: weft cutter, 95: gripper guide, 100: reed, 100a: reed Feather, 107, 11
0: high-frequency electrode (adhesion device), 111: ear cutter, 1
16: Take-up roller.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location D03D 49/60 D03D 49/60

Claims (6)

(57) [Claims] 1. A weaving device for weaving a lattice-like woven fabric using a synthetic resin tape for a warp and a weft, wherein a warp shedding device determines the lengths of an upper thread and a lower thread when a shed is formed. It is formed so as to be substantially equal, the shed is closed at the time of beating, and a needle thread pressing bar for holding and bending the upper thread at the reed side of the weave front downward when the shed is formed,
A weft insertion device inserts a rapier band in which a gripper for holding a weft is fixed to the tip from one side of the shed along the gripper guide in the shed into the shed, and a weft supply provided on the opposite side of the shed. The leading end of the weft is gripped by the gripper with the device, the weft is inserted by retreating the rapier band, and the weft is cut on the opposite side of the shed. A weaving device for a synthetic resin lattice-like woven fabric, wherein the height of the upper end of the reed wing is formed low so that it can pass below the upper thread presser bar at the time of beating. 2. The weaving device for a synthetic resin lattice-like woven fabric according to claim 1, further comprising an adhesion device for adhering the intersection of the warp and the weft reaching the weaving front by beating. 3. A pair of upper and lower guide rollers are rotatably mounted between a pair of left and right flat plates whose healds of the opening device are long in the vertical direction so that the shafts face the width direction. The weaving device for a synthetic resin lattice-like woven fabric according to claim 1 or 2, wherein a gap into which a synthetic resin tape for a warp can be inserted is formed. 4. The shed according to claim 1, wherein the shedding device forms the upper shed so that the lower thread when the shed is formed is positioned substantially horizontally between the heald and the weave front. A weaving device for the described synthetic resin lattice fabric. 5. A gripper includes a spring for urging a weft holding portion of the gripper in a direction to always close the gripper, wherein a weft supply device draws a weft from a weft bobbin, and a drawer roller. A nozzle guide for slidably holding the tip of the cut weft, a weft cutter for cutting a weft extending from the nozzle guide to the warp side, and a weft holding portion of the gripper on the warp side of the weft cutter. 5. A weaving device for a synthetic resin lattice-like woven fabric according to any one of claims 1 to 4, further comprising opening means for opening the spring against the bias of the spring. 6. A weft pull-back for temporarily retracting a weft end cut out by a weft cutter and projecting from the nozzle-shaped guide into the nozzle-shaped guide between the pull-out roller and the nozzle-shaped guide until the next weft insertion. The weaving device for a synthetic resin lattice woven fabric according to claim 5, further comprising an apparatus.