JPS5940933B2 - Looms, projectiles used in looms, and projectile launch and storage devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to weaving looms, and more particularly to the introduction of compressed air through the loom with a weft thread fed from a supply package positioned externally to the loom.

There are several types of conventional compressed air looms; in one type the weft thread is blown through seven shuttles.

One disadvantage of this type of loom is that the width of the fabric that can be woven is limited due to the reduced velocity and turbulence of the air flow propelling the weft threads.

The air turbulence also tends to untwist the weft threads, so only certain types of weft threads can be used.

Another disadvantage of this type of loom is the inability to hold the weft threads under adequate tension.

Another type of compressed air loom utilizes a bobbin support shuttle of sufficient size that is propelled by an air stream.

A disadvantage of this type of pneumatic weft insertion loom is that the power consumption required to propel the shuttlecock is so high that it makes the weaving operation impractical.

Another type of loom uses air to insert the yarn into a hollow shirttle, which is propelled mechanically.

Sufficient yarn is stored for several weft insertions.

However, this shuttle is too thick to insert the weft threads at high speed, and it is difficult to pull out the weft threads with an average and uniform tension.

Additionally, modern pneumatic looms utilize small shuttles to transport the free ends of the weft threads through a shed.

The ends of the weft threads are, for example, as described in U.S. Pat.
3,395,73, or blown into a hole in the shuttle as described in U.S. Pat. No. 3,395,73.

In this type of pneumatic weft insertion loom, the weft insertion speed can be increased, resulting in better weft control and lower power consumption.

The present invention improves upon the looms described in the two above-mentioned U.S. patents by providing more precise control of the weft threads, better control of the movement of the shuttle, and proper control of the shuttle when it finishes its movement. I try to do that.

These improvements include a new pneumatically inserted shuttle, a shuttle guiding device, a shuttle, and a shuttle installed at both ends of the track to house the shuttle and transport a portion of the weft into the shuttle. This can be accomplished by providing a novel shuttle launch and containment system that inserts and launches the shuttle from one end of the shuttle to the other.

This shuttle launching/accommodating device is designed to receive the shuttle ejected from the opposite side of the loom, and also houses a pneumatic device containing a valve for propelling the weft yarn behind the shuttle with air while the shuttle is in flight. are doing.

Also provided is a device for cutting and tightening the weft threads after insertion of the valley weft threads.

Referring to FIG. 1, a loom to which the weft insertion mechanism of the present invention is applied is generally designated by the reference numeral 20.

The loom 20 includes a conventional frame member 22, a feeder, a beam 24, a pick-up roll 26, a shuttle of a common type such as a dobby type, and a heddle frame 28 operated by a track-forming mechanism or shedding device (not shown). We are prepared.

Lay L, for example, U.S. Patent No. 3,59
It supports a prior art thread cutting and clamping device 29 positioned on the outside of the ear S as described in US Pat. No. 8,158.

Shuttle The shuttle, which guides the weft thread through the path, is shown generally at 30, particularly in FIGS. 12 and 13.

Shuttle 30 is generally cylindrical in shape and has a generally flat end surface 32 perpendicular to its longitudinal axis X.

Although these end faces can be made concave, it is more important that they not be made convex to a significant extent.

The reason for this will be explained later. The center of the shuttle is generally hollow.

This hollow central portion is divided into two annular chambers 34 by a spherical partition 36.

Each chamber 34 has an opening 4 at each end 32.
It has a frusto-conical portion 38 extending to zero.

The partition 36 is provided with a plurality of slots 42 extending between the chambers 34 and each positioned at an angle to the axis X.

The function of the slots 42 is to allow air to pass from one chamber to the other, creating a circular air flow within these chambers when air is blown into one of the openings 40.

The frusto-conical portion 38 of the chamber 34 converts this circular air flow into a vortex, so that if the free end of the weft thread is positioned within the aperture 40 through which air is blown, the free end passes therethrough. and deposited in the corresponding chamber 34 in a loose helical coil.

The mechanism for feeding the weft yarn and blowing air into the opening 40 will be described later.

Shuttle Launching and Retaining Device Referring to FIG. 1, there is a shuttle launching and storing device, designated 44 and 44', located at the right and left ends of the loom, respectively.

Since both devices are the same, only one device 44 will be described in detail.

Corresponding parts of device 44' are shown with a prime added to the reference numerals that refer to the parts of device 44.

Devices 44 and 44' are enclosed within covers 46 and 46', respectively, although device 44 and its valve control system, indicated generally at 48, are shown enlarged in FIG. 2 with the top cover removed. It is.

2 and 3, the device 44 includes a housing 50 having a shuttle receiving aperture 52, a firing chamber 54 pneumatically connected to the aperture 52, and a firing chamber 54 extending through the chamber 54 and extending through the aperture 52.
A nozzle 56 is provided.

A passageway 58 pneumatically communicates the nozzle 56 to the exterior through the opposite end of the housing.

A flexible bumper 60 is positioned near the hole 52 and the chamber 5
Forms part of 4.

Bumper 60 is formed of a resilient material, such as rubber, and includes a series of annular grooves 62 to increase flexibility along the longitudinal axis of chamber 54.

A plurality of annular air braking units 64 are arranged along the hole 52.

These units form part of the wall of the hole 52 and one of these units is shown in FIGS. 6 and 7.

Each unit 64 has a housing 66 and an annular member 68 mounted centrally on the inner surface of the housing.

The member 68 has a pair of axially (or in the direction of the bore 52) projecting flanges 78 and an inwardly facing annular groove (or recess) 10 between the flanges.
0 is communicated with the outside of the housing by a hole 72 extending radially through the annular member 68 and the housing 66.

An annular resilient liner 74 is attached to the annular member 68 by engaging a pair of internal grooves 76 at its axial ends with the flanges 78 and overlies the grooves 70.

A plurality of U-shaped brake sections, generally designated 79, are provided.

Each section 79 includes a pair of end sections 80 that are slidably mounted in radial slots 82 near the ends of housing 66 .

Each section 19 extends between end sections 80 and liner 7.
It has an intermediate portion 84 which is in pressure contact with 4.

When compressed air is applied to hole 72, the entire groove 10 is pressurized causing the liner 14 to deflect inwardly, thereby causing the liner to move portion 79 inwardly.

Each end portion 80 extends into an annular groove 87 and engages a shoulder 88 to limit the extent to which portion 19 moves inwardly. Limit lJ.

Portion 79 is made of a suitable material for movable purposes and engages the shuttle when it is within hole 52 when groove 70 is pressurized.

The bypass unit 64 is effective in slowing down the shuttle launched from the opposite side of the loom to a point where it almost comes to a standstill.

Bumper 60 acts as a final stop for the shuttle.

This causes each time the shuttle enters the hole 52 to abut the bumper and thus cause the nozzle 56 to be inserted into the opening 40.

Pressurized air is supplied to brake unit 64 from a high pressure source, such as pressure tank 90 shown in FIG.

Pressurized air from tank 90 is supplied to diaphragm valve 94 via supply conduit 92 .

Pressurized air is supplied to port 96 near diaphragm valve 94 when valve 94 is in the "closed" position.

Port holes 96 pneumatically communicate the holes 12 of each brake unit 64 with a conduit 98 provided in the housing.

With particular reference to FIG. 5, diaphragm valve 94 is shown in a "closed" position with brake unit 64 in a braking condition.

Valve 94 has a supply port 99 connected in air to port 96 .

Pressurized air from source 90 passes through conduit 100 to port 99
is supplied to maintain the brake unit 64 in the M-motion state.

An annular discharge chamber 102 surrounds the mouth hole 99 and is in pneumatic communication with the atmosphere through a hole 104 .

Pressurized air from source 90 also flows through conduit 108 and passageway 10.
9 and is supplied to the stabilization chamber 106.

Stabilization chamber 106 is separated from port 99 by diaphragm 110.

Diaphragm valve 94 has a port 112 that is pneumatically connected to conduit 108 via an annular slot 114.

When a hollow slider 116 is slidably mounted within bore 112 and is in at least the position shown in FIG.
It acts to seal the hole 112 from the hole 112.

Slider 116 has a slot 118 extending from its exterior to its hollow interior.

When slider 116 is moved to the left as viewed in FIG. 5 so that slot 118 is aligned with slot 114,
Air from stabilization chamber 106 passes through passageway 109 into slots 114, 118, then into slider 116, and finally escapes to the atmosphere.

This reduces the pressure within the stabilization chamber 106 and therefore
The pressure inside the supply port hole 99 causes the diaphragm 110 to
to allow pressurized air to escape from the orifice 99 through the annular orifice 120 into the discharge chamber 102.

In this case, the pressurized air from the mouth hole 99 can escape to the atmosphere through the hole 104, and the groove 7 provided in the brake unit 64 can escape.
All zeros are depressurized and these units are placed in the non-braking position.

As a result, the shuttle within the reservoir hole 52 can be launched without any hindrance, as will be described later.

Referring again to FIG. 3, two diaphragm valves, generally designated 122 and 124, similar to tire phragm valve 94 are also provided.

One major difference is that the valves 122, 124 have larger feed ports, indicated at 126, 128, respectively, that are tapered in their respective diaphragms 134, 136.

Further, each of the annular discharge chambers 12L123 is supplied from a conduit 125 (only one is shown in FIG. 4) to the orifice 12L.
26,128 is not supplied.

The valves 122, 124 have sliders 130, 132 which allow pressurized air in the discharge chambers 121, 123 to deflect diaphragms 134, 136, respectively.

At the moment the diaphragm 134 breaks the seal at the lip of the supply port hole 126, the air in the chamber 121 flows into the annular port hole 1.
38 and ejects very quickly, creating pressure waves that move at supersonic speeds.

This pressure wave is directed into chamber 54 and acts to greatly accelerate the shuttle and cause it to fire through hole 52.

The valve 124 acts in the same manner as the valve 122, and the air flows through the annular opening 14.
0 to the mouth hole 128 and along the passage 142 to the passage 5.
8 into a series of annular jackets 144 with openings.

From the supply package (not shown) through passage 58 to nozzle 5
The weft threads extending through 6 are propelled through holes 52 into the shed.

A poppet valve 1 is disposed on the opposite side of the housing 50 from the valve 124.
46 is located and the valve is connected to a source of low pressure air, such as tank 148, via supply conduit 150 as shown in FIG.

Poppet valve 146 includes a chamber 152 that communicates with a groove 154 in housing 50 by a plurality of circularly arranged holes 156 as shown in FIG.

Groove 154 is in air communication with jet 144 .

Poppet valve 146 also includes a free-floating poppet or flat disk 158 having an annular edge 160 that tapers away from bore 156ζ.

The pressure within chamber 152 forces disk 158 against hole 156, but the underside of the disk is sufficiently tight to completely cover hole 156 (G).

Low pressure air from supply conduit 150 passes through valve 146 to groove 15.
4 and is directed from jet 144 to passage 58 .

The purpose of valve 146 is to direct a flow of low pressure air through groove 58 and nozzle 56 so that the weft yarn contained therein is deposited within the shuttle when it is positioned within hole 52. It is to do so.

The nozzle 56 is fully positioned in the shuttle opening 4.
0 and the weft threads are disposed within the shuttle as previously described in connection with the shuttle.

When the shuttle is launched and the weft is propelled behind the shuttle, high pressure air from valve 124 enters groove 154.

The high pressure air entering through the holes 156 overcomes the low pressure air within the chamber 152 causing the disc 158 to sealingly engage the opening 162 through which the low pressure air from the supply conduit 150 enters the chamber 152 .

In this way, high pressure air does not enter the low pressure conduit.

The poppets 158 have a relatively slight surface over the openings of the holes 156 so that low pressure air can enter these holes 156 but the tapered edges 160 overlap the holes 156 so that the poppets 158 are forced into the openings 162 by high pressure air. It has a .

With particular reference to FIG.
64 is provided with a carriage 163 slidably supported.

Sliders 116, 130, and 132 extend through their respective diaphragms as described above and are supported by carriage 163.

Carriage 163 is reciprocated in the direction of arrow 166 by a "constant diameter" cam 168 which bears against a pair of followers 110 operatively attached thereto.

Cam 168 is connected to main drive shaft 16 as shown in FIG.
9 in a timed relationship with other parts of the loom.

Sliders 116, 130, 132 are simultaneously driven by cam 168.

The slider is adjustably mounted to the carriage 163 by a set screw or the like 172 so that the order of operation of the valves can be adjusted as desired.

The exact order of operation of these valves will be discussed below.

Still referring to FIG. 2, orbital cam 174 is also driven from the main drive shaft and connects follower 176 and linkage 17.
8, the thread take-up lever 180 is activated.

A weft thread, designated Y, extends from the housing 50 and is threaded through a pair of fixed guides 182 and a clamp 184 and back into the supply package 186.

The weft thread Y also extends between the guides 182 and the pick-up lever 1
80 is also passed.

Normally, the weft yarn Y runs in a straight line between the guide 182 and the lever 180, but at an appropriate point during the weaving operation, the cam 174 pulls the lever 180 in the direction of the arrow to take up a portion of the weft yarn for the purpose described below. .

Referring to FIGS. 1 and 9, thread clamps 184 are provided at each end of the loom.

Each clamp 184 has a bellcrank lever 19
A pair of flat disks 1 supported by one arm of 2
It is equipped with 90.

The other arm of the lever 192 supports a cam follower 194 which is in pressure contact with a face cam 196 which is driven in timekeeping with other parts of the loom.

Spring 198 forces follower 194 onto cam surface 200 of cam 196.
It is held in pressure contact with the

A compression spring 202 presses against the flat disk 190 and maintains a tensioned state by pressing against the weft yarn Y extending between these disks.

When the follower 194 rides on the portion 204 of the cam 196, the lever 192 is swung counterclockwise by the spring 198, allowing the disk 190 to relax the tension of the spring 202 against the disk and move downwardly.

The weft thread Y is no longer clamped between the discs and can be freely withdrawn from the supply package 186.

Shuttle Guide and Weft Driving Device (Reed) Referring to FIGS. 1, 10 and 11, the shuttle guide and weft driving device or "reed" is shown generally at 205 and is connected to the lay L. It includes a plurality of individual reed wings 206 which are secured to a rod 208 extending through a hole 210 provided therein.

Each wing 206 has a circular hole 21 having a diameter slightly larger than the shuttle 30 as shown in FIG.
It has 2.

A slot 214 extends forward from hole 212.

The holes 212 in the feathers 206 collectively form a guide groove for the shuttle.

This guide groove is designated at 216 in FIG.

When the shuttle is propelled through the guide groove 216 and the weft thread is passed through the guide groove, the ray L moves forward to the driving position and the rear surface 218 of the hole of the reel feather 206 carries the weft thread through the weft. 258 (FIG. 21).

The ray L then moves rearwardly and the fully driven weft thread remains in the section 258 and the aperture 214 passes through the opening thereby releasing the weft thread.

A rod 221 extends through a hole in the top of each reed wing 206 to hold the warp threads in place between the reed barrels.

The various parts of the loom are timed as follows:
6 is positioned on the ray L in the following manner, so that the hole 212 is within the shed when the shuttle is launched.

The shed is indicated by a dashed line 219.

The wings 206 and the shuttle 30 cooperate with each other to create an aerodynamic effect that allows the shuttle to be propelled through the groove 216 in a stable suspended state. be.

Shuttle 30 travels approximately 27.43 m per second (90F).

It is propelled at subsonic speeds of p, s, ).

The actual speed of the shuttle depends on the width of the loom, weaving speed and other practical considerations.

This shuttle speed is so high that it forms a pressure band or increases the pressure on the flat front surface 32 as it moves through the guide groove 216.

This air at the front of the shuttle escapes in the direction of the arrow 224 between the spaces 222 between the wings 206 at a pressure greater than atmospheric pressure.

The end surface 32 of the shuttle 30 is the circumferential surface 226 of the shuttle 30.
They intersect to form a sharp edge 228.

Reed wing 206 has an annular inner surface 230 that is parallel to longitudinal axis 233 of groove 216 and cooperates with a flat surface 234 of reed wing 206 to form a sharp annular edge 232 .

As long as leading edge 228 of shuttle 30 is positioned along longitudinal axis 233 of groove 216 between edges 232, air can escape into space 222 in the direction of arrow 224.

The leading edge 228 is the leading edge 232 of one of the feathers 206
When lined up with , the air flow is restricted and the air flow is
It immediately changes by ζ in the direction of 5.

This airflow changes gradually in the direction of arrow 224 until edge 228 is aligned with the leading edge of the next feather.

This relationship between the shuttle and these feathers during motion creates a pulsating airflow around the edge 228 of the shuttle 30 that stabilizes the forward end of the shuttle and helps the shuttle fly through the shuttle and the path. It is held in a centered position within the groove 216 during movement.

The end surface 32 does not necessarily have to be absolutely flat as shown; this surface forms the forward pressure zone of the shuttle, which is the surface 22L! :The center area can be concave or slightly convex as long as a sharp edge is formed.

The rear end 32 of shuttle 30 is also stabilized by the partial vacuum and backflow created behind it.

This is a well-known phenomenon of aerodynamics of moving objects.

This effect is commonly referred to as "drag" and occurs when surface 32 is generally flat but concave.

As the shuttle moves forward in the guide groove 216 in the direction of arrow 237, air is forced into the space 222 but then returns to the groove 216 in the direction of arrow 236 as a subatmospheric pressure is created along the circumferential surface 226I.

The air returning through the space 222 generates dynamic pressure along the entire circumferential surface 226.

There is also a turbulent "boundary layer" along plane 226 that flows in the same direction as the shuttle but in the direction ζ of arrow 239 relative to the shuttle O.

This boundary layer is reinforced by air exiting the pressure zone in front of the shuttle through the space between the shuttle and groove 216.

The increased pressure caused by the air flowing through the space 222 causes the shuttle within this boundary layer to collapse 206.
This acts to support the support away from the inner surface 230 of the.

Due to the aerodynamic effect described above, the shuttle is propelled and guided along a precise trajectory through the shed path without any frictional loss with the peripheral wall of the hole 212.

The aerodynamic effects described above depend on a number of factors.

Changes in one factor require changes in other factors.

These factors include the dimensions and weight of the shuttle, the dimensions of the groove 216, or the gap between the shuttle and the surface 230 (!l-), the thickness of each feather 206, the distance between the feathers 206, and the distance between the feathers 206 and the shuttle. It is speed.

The factors that produce this aerodynamic effect can be combined in various ways.

An example of one combination of these factors that produces an aerodynamic effect is as follows.

Shuttle speed 50.30 m/5ec(
165F, P, S,) Shuttle weight 1.7 g Shuttle length 38.10 mm (1.5 inches) Shuttle diameter 9.65 mm (0.38 inches) Diameter of guide groove 216 9.86 mm (0.388 inch) Thickness of reeding wings 206 0.38 mm (0,015 inch) Distance between reeling wings 206 0.406 mm (0,016 in.)
Another Embodiment of the Shuttle Guide and Weft Driving Device Referring to FIG. 20, a different reed wing 206' is shown clamped to the lay L and supported by the rod 208'.

The wing 208' has a circular hole 212' and a slot 214'L extending from the hole to the outside.

Like the hole 212, the hole 212' is a guide groove 21 for the shuttle.
6'.

The rear end surface 238 of the slot 214' is defined by an upwardly extending portion 240.

After the weft thread is inserted into the guide groove 216', the lay L moves forward and the weft thread is moved upwardly along the surface 238 through the thrower l-214'.

When the lay L reaches the weft thread driving position, the slot 214'
A forwardly extending portion 242 forming a front portion of the forwardly extending portion 242 passes through the driving position and extends over a surface 238 over the slot 214′.
The upper part performs the action of driving the weft thread.

The rod 221' restrains the warp threads through the reed feathers 206'.

Ray, drive device Referring to FIG. 21, shuttle guide/weft driving device 2
The ray L supporting 05 is supported in a pivot manner at a location indicated by reference numeral 244.

The lower part of the ray L is branched into two arms 246 and 248.

Followers 250 and 252 are connected to arms 246 and 248, respectively.
A pair of coaxial cams 254 and 256 are engaged with each other.

These cams 254,256 are adapted to cause the ray L to reciprocate between the solid line position and the dashed line position and to provide significant stagnation in the rearward position shown in solid line.

The lay remains in this backward position while inserting the weft thread.

As the lay is moved to the forward position, the guide 206 slot 214 allows the weft driving portion 258 of the fabric F to enter the opening 212 and allows the rear surface 218 to drive the inserted weft thread.

Referring to FIG. 22, the feather 206 shown in FIG.
The ray made available for ' is indicated by the symbol L'.

Lay L' is pivotally supported at a point indicated at 260, which is closer to the weft thread driving portion 258') than in the case of lay L.

The power to drive each ray L' is provided by a pair of arms 246.
A pair of followers 252 positioned at ', 248'
a pair of coaxial cams 254', 250' engaging the cams 254', 250';
56'.

Arms 246', 248' extend from lever 262, which is pivotally supported at 264.

The lever 262 is caused to reciprocate in the direction ζ of an arrow 266 by a cam.

This movement is transmitted via link 267 to a lever 268 supported on pivot pin 260 and extending below the pin.

Links 267 are pivotally mounted to levers 262 and 268 at points 270 and 272, respectively.

The lay L' is arranged so that the opening 212' is not in the shuttle path 219' and is located below the weft driving portion 258' when the reed feather 206 is in the forward position (shown by the chain line in FIG. 22). is attached to the top of the.

When the short lay is supported by the pivot pin 260, the wing 206' moves very quickly.

As the lay moves to the forward position, the weft threads move toward the trailing edge surface 238.
slot 214' in surface 238.
The upper portion is driven into the weft thread driving portion 258'.

GENERAL OPERATION With reference to FIGS. 14 to 19, the weft insertion cycle is diagrammatically illustrated.

In FIG. 14, shuttle 30 is shown in hole 52' of shuttle launch and containment system 44'. This is exactly what is shown.

At this time, the pick-up lever 180' is in the retracted position.

The weft thread just inserted from the supply package 186 is cut and clamped by the thread cutting/clamping device 29 on the right side at a point 273, and the pick-up lever 18
0 moves to its retracted position.

The severed end 2γ4 extending rearwardly into the thread package 186 is pulled back to the mouth of the nozzle 56.

The lay is advanced into the weft thread driving position indicated at 275 and the device 29 is unclamped to release the weft thread ends.

Next, the lever 180' is moved from the retracted position to relieve the tension on the clamp 184' and blow the weft yarn into the chamber 34 on the left side of the shuttle 30 in a loose helical coil as shown in FIG.

This action is performed by the poppet valve 146 and the low pressure air system described above.

The valves associated with the shuttle launch containment system 44'0 are shown in FIG.
After being inserted into one of the brake units 64', the brake unit 64' is actuated to release.

Shuttle 30 is then launched and the weft from supply package 186' is aerodynamically propelled behind the shuttle as shown in FIG.

In cutting, when the shuttle 30 reaches a certain point in flight through the shed, the clamp 184 is activated to clamp the weft yarn.

The shuttle continues to fly, but the coiled portion of the weft thread unwinds as shown in Figure 17.

If the clamp 184' is actuated at the appropriate time, the leading end of the weft thread section 276 will leave the shuttle at the point 273 where the previously driven weft thread 275 was severed, as shown in FIG.

Brake unit 64 is activated to stop shuttle 30 prior to entering hole 52 in shuttle launcher and containment system 44.

The weft yarn inserted in this manner is cut at a location indicated by the reference numeral 278, and becomes the next driving weft thread as indicated by the reference numeral 280 in FIG.

After the thread has been cut at 278, the thread take-up lever 180' is retracted and the cut end of the thread extending from the package 186' is placed at the mouth of the nozzle 56' as shown in FIG. It will be pulled back to.

The shuttle launch and containment system 44' is now ready to receive a shuttle 30 from the system 44 again.

Shuttle 30 is propelled from device 44 to device 44' in the same sequence of operations described above to fly it from device 44' to device 44ζ.

[Brief explanation of the drawing]

Fig. 1 is a top view of the loom according to the present invention, Fig. 2 is an enlarged top view of the shuttle launch and storage device, and Fig. 3 is 3-3 in Fig. 2.
Fig. 4 is an enlarged longitudinal cross-sectional view taken along the line 4--4 in Fig. 3 and showing one of the valve units for inserting the weft thread. Figure, 5th
The figure is an enlarged vertical cross-sectional view of the valve unit that operates the pneumatic shuttle braking device taken along line 5--5 in Figure 3, and Figure 6 is the shuttle brake unit seen in the direction of arrow 6 in Figure 3. 7 is a partially cutaway enlarged end view of one of the
Figure 8 is a cross-sectional view taken along line 8-8 in Figure 3, showing the poppet valve, Figure 9 is a cross-sectional view taken along line 8-8 in Figure 3, showing the poppet valve. 9 is an elevational view showing the weft thread clamping device as viewed along the direction 9; FIG.
Figure 11 is a diagram showing the shuttle guide/weft driving device (reed) as seen along the arrow. FIG. 12 is a longitudinal sectional view of the shuttle, FIG. 13 is a vertical sectional view taken along line 13-13 in FIG. 12 and viewed in the direction of the arrow, and FIGS. Fig. 19 is a diagram showing the operating sequence, Fig. 20 is a diagram showing a shuttle guide/weft driving device different from that in Fig. 10, and Fig. 21 is an end view of the lay 1 drive mechanism, partially cut away. , FIG. 22 is an end view of a lay drive transverse structure similar to FIG. 21 but used in the shuttle injection/weft driving device of FIG. 20 as a modification. 20...Loom, 30...Shuttle, 3
2... End face, 34... Chamber or void,
40...-opening, 44°44'°-°°--Shuttle launch/accommodation device, 52...hole, 54...
...chamber connected to the hole, 56...tsuzuru, 64.
... Shuttle suppressor, 90 ... Compressed air supply source, 94 ... First valve, 122 ...
...Second valve, 186°186'... Supply package, 206... Sawing, 212...
Circular hole, 214...Slot, 216...
... Guide groove, 219, 219' ... Shuttle, 22
2...Slot, L...Ray, Y...
...Weft.

Claims (1)

[Scope of Claims] 1. A loom comprising a device for forming a lay and a shed, and an air chamber weft insertion mechanism for inserting a weft from an external supply package into the shed, comprising: (a) at each end; The weft yarn is guided through the shed by an annular outer edge having a planar surface perpendicular to the longitudinal axis, such that a substantial portion of its end face does not extend beyond said edge. a cylindrical shuttle that guides the shuttle through the shuttle; (b) a shuttle launch/storage device that launches the shuttle and passes it through the shuttle, and receives and stores the shuttle that has been passed through the shuttle; (c) the above-mentioned. A plurality of spaced apart reeds supported by a rail, each reed having a circular hole having a diameter greater than the diameter of the shuttle and a slot extending from the hole to the outside thereof. a reed loom mounted on the lay and arranged so that the holes are aligned to form a matching guide groove for the shuttle within the shed. 2. In a loom having a lay, a device for forming a shed, and a pneumatic weft insertion mechanism for inserting the weft threads driven into the shed from an external supply package, (a) at each end longitudinally; a cylindrical shape for guiding said weft thread through said shed, having an annular outer edge in a plane perpendicular to the axis, such that a substantial part of its end surface does not extend beyond said edge; a shuttle having at least one cavity and an opening connected to said cavity and relative to said end face; (b) an aperture provided at one end for receiving the shuttle; a pneumatically connected chamber extending through the chamber and into the aperture so as to extend into the opening of a shuttle housed within the aperture and to transfer weft from an external source to the aperture of the shuttle; a nozzle adapted to supply into the cavity, a source of compressed air, a first valve connecting the nozzle to the source of compressed air, and a second valve connecting the chamber to the source of compressed air; a shuttle restraining device associated with the hole; and a shuttle launching and containment device for launching and passing the shuttle through the shuttleway, and for receiving and storing the shuttle through the shuttleway; a plurality of spaced apart reed wings supported on the shuttle, each having a circular hole having a diameter greater than the diameter of the shuttle and a slotted trough extending from the hole to the outside thereof; a reed feather mounted on the lay and arranged so that the holes are aligned to form a guide groove for the shuttle that aligns with the shed;
including looms.