JPH039218B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a circular loom, and in particular, since the shuttle that moves in a circular manner holds a bobbin in the radial direction of a circular orbit, the dimensions are shortened in the orbit direction. This invention relates to a circular loom whose weaving speed can be increased by adding a shuttle.

[Prior art]

In a conventional circular loom, for example, a circular loom for making polypropylene (PP) polyethylene (PE) bags, a large number of warp threads 10 are arranged in parallel and alternately divided into two sets, as shown in Figures 3 to 5. , the two sets move in opposite directions to each other and are passed through a plurality of pairs of healds 12, 12 for forming a shed,
Next, the reed 13 is inserted horizontally through each gap alternately through the upper and lower ends of the gap, and then wound up. Although not shown in the figure, the warp threads 10 that form this shed ascend from the bottom of the loom, are once hooked onto the tension pieces 11, and are arranged laterally in a radial direction in a donut-like circle, and the shed 14 is cylindrical. Placement receptacle 13
The guide ring 131, 131, which also serves as a support frame for the upper and lower reeds 13, is in sliding contact with the inner circumferential surface of the loom, and is brought into contact with the guide ring 131, 131, which also serves as a support frame for the upper and lower reeds 13, via rollers 142, 142, and is provided at the upper end of the rotating shaft 140 at the center of the loom. A driving member 29 cantilevered toward the outer periphery of the rotary plate 28 is pushed by a free roller 291 at the tip end from the outside of the warp yarns, so that the warp yarns can be moved circumferentially. In the diagram, bobbin 141
As shown by the two-dot chain line, the shaft center line is attached along the longitudinal direction within the main body 144, the axis of which extends substantially along the trajectory of movement of the shuttle 14.

Furthermore, the opening mechanism forming the shed includes the healds 12, 12, and the healds 12, 12, respectively.
Continuous strokes 15 and 16 whose tips are connected to 12
and rotating arms 17, 18 whose central portions 171, 181 are pivotally supported on the loom frame, and whose one ends are connected to the lower ends of each of the continuous stitches 15, 16,
A pair of upper and lower curved undulating cam grooves 191, 191 are formed symmetrically on the circumferential surface of the rotating arm 1.
The grooves 191, 19 whose other ends 7, 18 are not shown
1 is equipped with a cam drum 19 that is interlocked via a roller that rotates freely, and by the rotation of the cam drum 19,
Corresponding to the period of the cam grooves 191, 191 during one rotation, the healds 12, 12 are moved inversely upwards and downwards relative to each other via the rotating arms 17, 18 and the links 15, 16,
A shed that moves circumferentially is formed in the warp yarn 10, and a corresponding number of shuttles 14 are made to move circumferentially following the movement of the shed.

The opening mechanism further includes healds 12, 12,
There is a proposal in which the continuous strokes 15, 16, the rotating arms 17, 18, and the cam grooves 191, 191 are simplified. That is, as shown schematically in FIG. 5, the cam drum 20
A single cam groove 201 is formed, and the rotary arm 22 is pivoted to the loom frame with a pin 21 so that the tip thereof is loosely inserted directly into the cam groove 201. 23 are connected, and an interlocking rod 24 is horizontally connected to the upper end of the connecting rod 23,
A front moving pin 251 and a rear moving pin 26 are respectively fixed in parallel on the front and rear sides through this interlocking ring 24.
1, the forward moving arm 25 and the rear moving arm 26, which are engaged with each other, are pushed at the same time, and the front and rear moving arms 25 and 26 have the heald 1 at the tip thereof.
A pair of adjacent warp yarns 10, 1 instead of 2, 12
0 are held so that they can move up and down in reverse.

[Problems with conventional technology]

The above-mentioned shuttles require a sufficient arc length to be able to move smoothly along a circular orbit, and therefore the number of shuttles that can be arranged on a circular orbit is limited, reaching a certain maximum weaving speed. It is impossible to improve productivity any further.

Circular looms according to the prior art are composed of extremely complex and numerous members, and the overall mass requires a driving force greater than necessary.
4, as shown in FIGS. 3 and 4, the main body 144 is in sliding contact with the peripheral surface of the reed 13 and slides at high speed, so a large frictional force is generated due to centrifugal force and heat is generated.
To deal with this, the upper guide ring 131 must be provided with lubricating means 132 at appropriate intervals for lubricating the friction surface. Along with this, during continuous operation, in order to prevent the lubricating oil from running out, inspection and lubrication are required for lower cutting, and wire breakage still occurs due to frictional heat. This may lead to inconveniences such as contamination.

Furthermore, as shown in FIG. 4, the shuttle 14 has a main body 144 having a longer shape in the direction of movement, and is driven by a drive member 29 of a rotary plate 28 through an abutting roller 143 protruding from the rear end. Since the free rollers 291 abut against each other and move at high speed, the tip of the guide ring 131 often flies out in the radial direction due to vibration, causing the entire shuttle 14 to deviate from the track. 131 due to deviation of the weft threads, and the free roller 291 at the tip of the driving member strongly moves the warp threads 1 at high speed.
This causes the phenomenon of scratching zeros, resulting in defective products.

[Purpose of the invention]

In view of the problems with the above-mentioned circular loom, the present invention
The purpose is to solve these problems and improve productivity. Furthermore, it is an object of the present invention to provide a circular loom whose shedding mechanism is simplified, which saves power by reducing mass, which is easy to manufacture and maintain, and whose costs are low.

[Structure of the invention]

The present invention is based on the above-mentioned object, and the feature of the means is to provide a circular loom in which a large number of warp threads pass through each gap of a reed arranged in a cylindrical shape to form a donut-shaped toroidal array portion in each radial direction, respectively. The two adjacent warp yarns are drawn alternately and simultaneously in opposite directions to form a shed, and a plurality of sheds are formed at regular intervals along a circular orbit, and the sheds are simultaneously moved in one direction along the circular orbit. a rotating mechanism that moves each shuttle in a circular orbit in synchronization with the shed while discharging the weft by rotation of the shuttle; The reason is that the shuttle bobbin is held so that its axis is in the radial direction of the circular orbit.

The above-mentioned shuttle is also characterized in that rollers are pivotally attached to the front and rear ends of the main body for rolling contact with the inner surface of the reed which is arranged in a cylindrical shape along a circular orbit. .

Furthermore, a pair of free rollers are mounted on the shaft of the above-mentioned shuttle, and are disposed along the same straight line from the lower rear end along the bobbin holding direction and corresponding to the front and rear ends of the shuttle. and comprises two rollers for pushing the drive member in the rotation mechanism while rotating on its own axis and in corresponding contact with each of the free rollers,
In addition, a rotary ring is provided that contacts one of the guide rings at the lower end of the reed and rotates by friction, and the pushing roller is driven to rotate through a belt pulley mechanism.

The present invention also provides a circular shedding mechanism that is held upright so as to be movable up and down in accordance with the warp threads, and is rotatable integrally with the warp rod through which the warp threads are passed through holes formed at the tips of the warp rods and the rotation mechanism at the center of the loom. The cam ring is supported by a cam ring having a pair of vertically movable cam grooves on its circumference in opposite pairs, and a roller is pivotally mounted on the lower end of each adjacent warp rod, and a cam ring on the opposite side is supported by the cam ring. It is characterized by being engaged with a groove.

[Effect]

According to the above means of the present invention, each shuttle is configured such that the weft bobbin is held in such a manner that the axis line 16 is in the radial direction of the circular track, thereby greatly shortening the length of the track. Because you can
The number of shuttles that can be arranged is increased, which means more weft threads can be released at the same time, leading to a corresponding increase in productivity.

The partially flattened reed member shown in the drawings of the present invention has its flattened parts parallel to each other so as to face the inner circumferential side of the track, and its upper and lower ends are held by guide rings that also serve as recessed frames. This provides a relatively flat movement trajectory for the shuttle, allowing the main body of the shuttle provided with rolling rollers to roll into contact with the rollers on the inner periphery of the track, and allows the shuttle to move from the rear to two of the drive members. The push roller passes the warp yarn through contact with the free rollers on both the inner and outer periphery and is propelled, and the push roller contacts the guide ring via a belt/pulley set and rotates on its own axis by a rotating ring that rotates internally by friction. The free roller will be pushed from the outside.

Then, in the shedding mechanism, the warp rod, which passes the warp threads directly through the tip hole, alternately traces the two cam grooves that rise and fall in reverse symmetry on the cam drum, so that the warp threads can be opened by moving up and down. As a result, the number of structural members can be significantly reduced.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the present invention will be described based on a plan view of a shuttle and a partially cutaway side view of a loom shown in FIGS. 1 and 2, respectively.

In the figure, reference numeral 30 denotes a rotating shaft supported upright, and at its lower end, a drive motor 301 attached to the base frame 3 drives a transmission mechanism consisting of a reduction gear, a belt pulley, etc., although detailed explanation is omitted. 3
It is designed to be rotated through 02. A circular rotating plate 303 is attached to the upper end of the shaft 30, and a plurality of driving members 31 are extended and bored at equal intervals around the outer periphery of the circular rotating plate 303.

The drive member 31 has a shaft 310 at the upper front part and a shaft 312 at the lower rear part supported by a support bracket 317. Push rollers 311 are integrally provided at both ends of the shaft 310, and the tip of the shaft 312 is supported by a support bracket 317. extends further beyond the shaft 310 and has a rotating ring 3 at its tip.
13 are integrally provided, and both shafts 312 and 310 are arranged so that the rotation of a rotary wheel 313 is transmitted to a push roller 311 by a belt pulley transmission mechanism 314.

Reference numeral 320 is a guide ring, in which the rotary ring 313 is in frictional rotational contact with the bottom surface of the guide ring.
Similarly, a guide ring 321 corresponds to the upper side with 0 in between, and jointly holds the reeds 330 in a circular arrangement so as to form a cylindrical shape. Each of the members of the reed 330 is made of approximately square rods, which are arranged uniformly at predetermined intervals so that one side faces the inner peripheral surface of the cylinder, and the guide ring 321 is attached to the upper ring of the fuselage frame for stability. It is reinforced and supported by a suspension frame 322 added to the member 323.

As for the opening mechanism, as shown in FIG. 1, two cam rings 35 and 36 are attached to the lower part of the rotary plate 303 via a frame bracket 34 that can be rotated integrally, and the cam rings 35 and 36 are attached in an inner and outer concentric manner. Both frame cams 352,
A plurality of vane-like retaining plates 351, 361 are clamped and fixed at regular intervals by 352, 362, 362, respectively, to form a cone wheel shape, and over the outer periphery, two parallel rails form mutually anti-synchronous up and down undulating curves. The cam grooves 37, 38 are fixed by welding or the like, and the warp yarns 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 39, 39, 39, 39, 39, which roll at regular intervals between the cam grooves 37, 38, respectively, extend vertically upward through the cam grooves 37, 38. 5
0... is provided with warp rods 40 and 41 through which threads are passed. Note that each of the warp rods 40 and 41 is connected to guide plates 42 and 42 provided on the machine frame.
By passing through it, it is held so that it can slide only in the vertical direction. Also, each parallel warp thread 5
The threads 0, 50, . . . are threaded through the warp rods 40 and 41 alternately. As a result, the two cam wheels 35, 3
6 is rotated integrally through the frame bracket 34, the cam grooves 37, 38 rotate and the warp rods 40, 4
1 are made to move up and down at the same period in opposite directions,
The ends move the warp threads 50, 50 up and down alternately so that they are opened.

Next, the shuttle 33 will be explained. In the figure, the shuttle 33 is arranged in front of the drive member 31. That is, a frame 336 has a surfboard shape and extends from the main body 335 toward the center of the circular orbit along the inner circumferential surface of the reed 330, and this frame 336 allows the axis of the frame 336 to be approximately aligned with the radius of the orbit. While holding the bobbin 331 in the direction,
Furthermore, push rollers 311 of the driving member 31 are arranged near both ends of the bobbin 331 along the radial direction.
The free rollers 332, 332 that come into contact with the rollers are respectively mounted on shafts. The main body 335
are arranged so that the inner circumferential surface of the reed 330 and the mutually opposing surfaces of the guide rings 321 and 320 come into rolling contact at the front and rear in the direction of movement.
Total of 4 pairs of rotatable wheels 334, 334 and 33
3,333 are interposed.

A support member 338 is further provided protruding from the front end of the main body 335 of the shuttle 33, while the drive member 31
A stay plate 315 is provided which extends rearward and has an idler roller 316 at its tip, and the idler roller 316 comes into contact with the abutting member 338 of the shuttle 33 adjacent to the rear from the lower side of the warp threads 50, 50. You can also do that.

In addition, in the shuttle 33 of the present invention, a guide rod 337 for the weft (not shown) is attached so as to extend from the tip of the frame 336 rather than from the main body 335, and the guide rod 337 for the weft yarn (not shown in the figure) is attached to extend from the tip of the frame 336, so that the guide rod 337 extends from the bobbin 331 with a circular orbit movement. The weft yarn passes through 337, and the warp yarn 50 of the shed,
The guide rod 33 slides into contact with the terminal end where 50 joins.
One of its features is that it is emitted from the tip.

〔effect〕

As is clear from the explanation based on the above embodiment, according to the configuration of the present invention, the shuttle 33 is connected to the bobbin 33.
1 in the radial (normal) direction to the main body 335, the proportion of the main body 335 in the circular orbit can be greatly reduced. Since more weft threads can be woven in one revolution, productivity is significantly increased.

Further, according to the experimental example, at least a part of the circumferential surface of each member of the reed 330 is flat, and by directing this plane toward the inner circumferential side of the circular orbit, the undulations of the circular orbit are eliminated, and moreover, the shuttle 330 By making rolling contact with the main body 335 via freely rotating wheels 334, 334, frictional force is largely eliminated, oil droplets are eliminated, and problems such as dirty water caused by oil and disconnection due to frictional heat are almost eliminated. .

Furthermore, by pushing the shuttle 33 into contact with the drive member 31 from two locations, inside and outside along the radial direction of the circular orbit, it is possible to reduce the possibility that the shuttle 33 protrudes from the tip of the main body 335 in the inner radial direction. Rolling contact on the smooth inner circumferential surface of the reed 330 allows for smooth movement with little vibration, and also eliminates the inconvenience caused by deviation from the circular orbit even during high-speed movement. Furthermore, the fact that the guide rod 337 slides into contact with the terminal end where the warp threads 50, 50 join together increases the stability of the shuttle 33 and reliably releases the weft threads to the normal position.
0.50, thereby reducing the occurrence of defective products.

The driving member 31 is a belt pulley mechanism 31.
4 to push the rotation of the rotating wheel 313 and the roller 31
1, and by pushing the shuttle 33 from the outside of the warp yarns 50, 50 via rotatable free rollers 332, 332 with a push roller 311 rotating in the opposite direction, the warp yarns 50, 50 can be moved even at high speed. It is possible to smoothly push the shuttle 33 without excessive friction or scratching.

On the other hand, as described above, if the rear Hestae ring 315 is extended to the front drive member 31 and brought into contact with the abutment member 338 of the adjacent shuttle 33 rearward from the warp yarns 50, 50 side, the number of shuttles 33 can be increased. Even if the number is increased as much as possible, an appropriate driving interval can be maintained, and interference with each other can be eliminated during high-speed circular operation.

Next, according to the opening mechanism of the above embodiment according to the present invention, double arrow-shaped cam rings 35 and 36 are provided in place of the conventional cam drum 19, and each of the double frame cams 3
52, 352, and 362, 362, on the outer peripheral side of the retainer plates 351, 361 provided at a distance,
Both cam grooves 37 and 38 are formed by parallel rails.
By forming the cam grooves 37 and 38, the warp rods 40 and 41 move up and down by directly following the cam grooves 37 and 38, respectively.
By making the warp yarns 50, 50 move up and down alternately, it is much simpler than the conventional method in which the healds are moved up and down through a complicated rotation mechanism, and as a result, manufacturing costs and management can be effectively reduced. It has also become possible to significantly reduce maintenance costs.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view of an embodiment of the circular loom of the present invention, taken longitudinally from the diametrical point and showing the main parts in a half symmetrical with respect to the axis, and Fig. 2 shows the vicinity of the shuttle in the same figure. FIG. 3 is a side sectional view showing an example of a conventional circular loom in the same manner as FIG. 1, FIG. 4 is a partially omitted plan view of the vicinity of the shuttle in the figure, and FIG. The figure is a perspective view showing the main parts of a second example of a conventional circular loom. 3... Base frame, 40, 41... Warp rod, 301... Drive motor, 302... Transmission mechanism, 303... Circular rotating plate, 320... Guide ring, 330... Reed.

Claims (1)

[Claims] 1. A plurality of warp yarns are formed in a radial direction to each other through each interval of the reeds arranged in a cylindrical shape to form a donut-shaped toroidal array portion, and each adjacent warp yarn is simultaneously and alternately reversed. an opening mechanism that forms a shed by drawing in different directions, forms a plurality of these sheds at regular intervals along a circular orbit around the reed, and moves them all at once in one direction along the orbit; It is equipped with a shuttle disposed in the mouth, and a rotation mechanism that causes each shuttle to move in a circular orbit in synchronization with the shed while discharging the weft by this rotation, and the shuttle moves the weft bobbin in a substantially circular orbit with its axis. A circular loom characterized by a structure in which the loom is held along the radial (normal) direction of the loom. 2 The above-mentioned shuttle is provided with two free rollers on the outer peripheral side and the center side along the radial direction of the motion trajectory at the lower rear part of the shuttle, and correspondingly, the two drive members are rotated on their own axis and rotated on each of the above-mentioned rollers. A rotating wheel is provided, which is equipped with a push roller that contacts and presses the free roller, and rotates by contacting and friction with a guide ring at the lower end of the reed. The circular loom according to claim 1, characterized in that the push roller is rotated by conduction. 3. The above-mentioned shuttle is provided with a roller for rolling contact with the inner surface of the reed arranged in a cylindrical shape along a circular orbit, and at least a part of the outer periphery of each of the reeds arranged in the cylindrical shape. 3. The circular loom according to claim 1, wherein the loom is a flat surface, and the flat surface is directed toward the inner surface. 4 A guide rod for guiding the weft of the bobbin to the periphery of the shed where the warp joins is attached to the tip of the frame extending from the main body toward the center of the circular orbit. The circular loom according to claim 1 or 2, characterized in that the circular loom is attached so as to be in sliding contact with the end edge of the shed. 5. The driving member is provided with a stay rod with an idler roller attached to the tip thereof extending toward the other side, and when the driving member is arranged in a circular orbit, the adjacent shuttle
The circular loom according to claim 1 or 2, characterized in that an abutment member that is brought into contact with the idler roller is provided protrudingly at a corresponding position. 6. A plurality of warp threads are each formed in a toroidal arrangement in a radial direction with respect to each other, and each adjacent warp thread is simultaneously and alternately drawn in opposite directions to form a shed, and the shed is aligned in a circular orbit. There is a shedding mechanism in which a plurality of sheds are formed at regular intervals and moved synchronously in the same direction along a track, and a shuttle is placed in each shed, and its rotation causes each shuttle to open and close to the shed while releasing weft yarn. and a rotation mechanism that simultaneously moves in a circular orbit, and the opening mechanism includes:
It is held upright so that it can move up and down according to each warp thread.
Each warp rod, through which the warp threads pass through holes formed at its tip, is supported so as to be able to rotate integrally with the rotation mechanism at the center of the loom, and each has a pair of vertically moving cam grooves in opposite symmetry on its circumference. What is claimed is: 1. A circular loom comprising: a cam ring provided in the loom; rollers are pivotally mounted to the lower ends of adjacent warp rods and engaged with cam grooves on opposite sides. 7 The above-mentioned cam ring is formed into a double arrow wheel shape by holding blade-shaped retaining plates at equal intervals along the circumference by a pair of upper and lower annular frame brackets, each having a double concentric ring shape. 2 on the outer circumferential side of each retaining plate arranged in a
7. The circular loom according to claim 6, wherein each of the cam grooves is provided by a parallel rail.