JPH0616952Y2 - Tuck-in selvedge device for shuttleless loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a tuck-in selvage device of a shuttleless loom for tucking in an end portion of a weft yarn by a jet flow.

2. Description of the Related Art A tuck-in selvedge device of a shuttleless loom is known to have a structure in which the end portion of a weft yarn that is beaten and cut to a required weft insertion length is tucked into a warp yarn opening by a jet flow of a tuck-in nozzle. (Patent No. 149217 and Japanese Patent Laid-Open No. 50-
982).

Problems to be Solved by the Invention In this conventional tuck-in selvage device, as shown in FIG. 14, the axis a of the injection flow of the tuck-in nozzle A is set parallel to the cloth fell B and , There are no obstacles on the reed side. Therefore, the jet flow is diffused to the reed side, and the weft yarn end portion D folded back into the warp yarn C opening is easily restrained by the warp yarn C while being separated from the weave B. When tucked in in this state, the weft yarn end portion D is restrained at the base end Da.
Therefore, when the front end Da of the weft yarn end portion D is not restrained, the base end Db receives the bending force by the warp C. For this reason,
The warp tension overcomes the tension of the weft end portion D and pulls the front end Db of the weft end portion D toward the base end Da side.
Is bent by a predetermined value or more, so that the warp tension of the tack ear is loosened and the ear becomes loose.

Means for Solving Problems In a tuck-in selvage device of a shuttleless loom, in which the end of the weft is blown into the warp opening by a jet flow from a tuck-in nozzle arranged on the side of the warp row to form a tuck selvage The tuck-in nozzle is set so that the axis of the jet flow intersects with the cloth fell at an acute angle, and the axis of the jet flow intersects with the axis of the jet flow of the first tuck-in nozzle. It is composed of a second tuck-in nozzle.

Example 1st Example In FIGS. 1 to 9, in the drawings, 1 is a warp, 2 is a heddle frame, 3
Is a reed, 4 is not woven, 5 is a woven fabric, 6 is a weft insertion main nozzle that swings integrally with the reed 3, 7 is a weft yarn, 8 is a yarn end treatment yarn, 9
Is a tuck-in selvage device, and 10 is a weft guide body provided outside the tuck-in selvage device 9 on the weft inserting main nozzle 6 side.

Here, since the tuck-in ear assembly device 9 is formed symmetrically and has the same basic structure, the structure of the tuck-in ear assembly device 9 on the weft insertion main nozzle 6 side will be described as a representative. The tuck-in selvage device 9 is equipped with a tuck-in nozzle 20, an air jet type weft gripping device 30 and a cutter 40 as shown in FIGS. The tuck-in nozzle 20 and the weft gripping device 30 are formed in a single body 11.

That is, the body 11 is formed with the slits 12 opening toward the reed 3 and both sides in the cloth width direction. This body 11
As shown in FIG. 3, the warp line 13 is attached to the loom frame (not shown) so that the warp line 13 is located in the middle of the slit 12. The slit 12 positions the weft yarn end 7a in the vicinity of the axis of the jet flow of the tuck-in nozzle 20. The reed-side end upper and lower edges 12U and 12B of the slit 12 are
Make sure to guide the weft yarn end 7a to the slit 12,
It has been opened up and down one after another. Back wall 14 of slit 12
As shown in FIG. 1, the central back wall 14C is located on the reed 3 side, and the left and right back walls 14L and 14R are inclined toward the reed 3 side.

On the other hand, the tuck-in nozzle 20 is the first as shown in FIG.
It is composed of a tuck-in nozzle 21 and a second tuck-in nozzle 22. The first tuck-in nozzle 21 is the body 1
It is opened to the right rear wall 14R of No. 1. The axis l ₁ of the jet flow of the first tuck-in nozzle 21 is set so as to intersect with the cloth fell 4 at an acute angle θ _{1 when the} body 11 is juxtaposed in the extension direction of the warp yarn 1. This acute angle θ ₁ is an angle when viewed in plan as in FIG. ₁ , and when viewed sideways as in FIG. 3, the axis l ₁ of the jet flow does not necessarily need to be directed to the cloth fell 4. There is no. Second tuck-in nozzle 2
2 is opened to the reed 30 side rather than the 1st tuck-in nozzle 21 of 14 R of right back walls. Second tuck-in nozzle 22
The axis l ₂ of the jet flow of No. ₂ is set in a direction intersecting the axis l ₁ of the jet flow of the first tuck-in nozzle 21, that is, at an acute angle θ ₂ on the reed 3 side with respect to the cloth fell 4. This acute angle θ
₂ is an angle when viewed two-dimensionally as shown in FIG. The acute angle θ ₁ is 2 to 6 degrees, θ ₂ is 0 to 2 × θ ₁ , the first,
The tip diameters of the second tuck-in nozzles 21 and 22 are preferably set to E> F, where E is the tip diameter of the first tuck-in nozzle 21 and F is the tip diameter of the second tuck-in nozzle 22. The air passage 23 communicating with the first tuck-in nozzle 21 and the second tuck-in nozzle 22 is provided in the body 11.
Is formed in. As shown in FIG. 4, the air passage 23 is connected to a pressure air source 24 via a regulator 25 and an electromagnetically driven switching valve 26. The switching valve 26 is opened by the control circuit 50 during the tuck-in period and closed otherwise.

The weft end gripping device 30 is composed of a holding nozzle 31 and a receiving portion 32 as shown in FIGS. Holding nozzle 3
1 is an upper member 11 that defines a slit 12 of the body 11.
It is formed close to the central back wall 14C of U. The receiving portion 32 is the lower member 1 that defines the slit 12 of the body 11.
It is formed in a groove close to the central back wall 14C of 1B.
The holding nozzle 31 and the receiving portion 32 are arranged to face each other via the slit 12. Upper member 11 of body 11
A concave portion 33 is formed in a portion of the U on the reed 3 side of the holding nozzle 31 so that ambient air is easily drawn into the jet flow from the holding nozzle 31. An air passage 34 communicating with the holding nozzle 31 is formed in the body 11. 35 is a blind plug. The air passage 34 includes the regulator 25 and the switching valve 2
6 is branched and connected via an electromagnetically driven switching valve 37 and a throttle valve 38. The switching valve 37 is opened by the control circuit 50 during the weft end holding period, and is closed otherwise.

The cutter 40 is arranged on the weft-insertion main nozzle 6 side of the body 11 as shown in FIGS. 2, 3 and 5, and is set so as to perform scissor cutting motion when the weft is cut. The opening 40 a is located in the slit 12 when viewed from the side.

As shown in FIGS. 3 and 5, the weft guide body 10 is disposed on the weft insertion main nozzle 6 side of the cutter 40, and guides the repulsed weft yarn 7 to its guide surface 10a so that the slit 12 surely receives it. It is to get in. The weft guide body 10 may be provided on the side of the cutter 9 on the right side, but it is not an absolute condition because the weft end treatment yarn 8 is provided.

According to the structure of the first embodiment, the throttle valve 38 is adjusted during the preparatory operation of the loom to make it suitable for the flow force of the jet flow from the holding nozzle 31.

First, after the weft insertion is completed by starting the weaving operation of the loom, the weft yarn 7 is beaten by the forward movement of the reed 3. During this beating process, the weft yarn 7 is guided by the guide surface 10a of the weft yarn guide body 10 and the upper and lower edges 11U and 11B, and enters the slit 12.

Next, as shown in FIG. 2, when the reed 3 is slightly retracted from the front end position of the beating, the warp 1 starts to be slightly opened in the opposite phase after the closing, and the axial center of the weft inserting main nozzle 6 is located at the central back wall. 1
4C, when the weft yarn 7 comes into contact with the central back wall 14C or moves to a position in the vicinity thereof, the cutter 40
Makes scissors cutting motion to cut the weft yarn 7. in this way,
When the weft yarn 7 is in contact with the central back wall 14C and is in a substantially straight line up to the weft insertion nozzle 18, the weft yarn 19 is cut to shorten the length of the weft end portion 7a as much as possible. At the time of this cutting, the switching valve 26 is closed, the switching valve 37 is opened, and the air flow is ejected from the holding nozzle 31 toward the receiving portion 32, so that the cut weft yarn 7 continues to the woven fabric 5. As shown in FIG. 6, the weft yarn end portion 7a is pulled by the air flow and is anchored at the hole edge of the receiving portion 32, so that the weft yarn end portion 7a is gripped prior to the tuck-in.

Then, as shown in FIG. 7, when the reed 3 is further retracted and the opening amount of the warp 1 is in a state where weft insertion is possible, the next weft insertion is performed. With the retreat of the reed 3 shown in FIG. 7, the switching valve 26 is opened and the switching valve 37 is closed. Then, the air flow from the holding nozzle 31 is temporarily reduced and finally stopped, and the jet flow from the tuck-in nozzle 20 is temporarily increased to a predetermined flow rate. Therefore, the holding force of the weft yarn end portion 7a of the weft yarn end gripping device 30 is temporarily reduced, and the force for blowing into the opening of the warp yarn 1, that is, the tuck-in force is temporarily increased, and as shown in FIG. The end portion 7a is bent in a Z shape at the base end, and after the state shown in FIG. 8, the tip end is blown into the opening of the warp yarn 1 and tucked in. That is, the jet flow of the first tuck-in nozzle 21 and the second tuck-in nozzle 2
By merging with the jet flow of No. 2, while weaving the base end of the weft yarn end portion 7a close to the weave fabric 4, the tip end of the weft yarn end portion 7a is pressed against the weave fabric 4 further. As a result, the weft yarn end portion 7a is tucked in at a position where the tip end is closer to the cloth fell 4 than the base end (see FIG. 9). The switching valve 26 continues to open until the end of weft insertion,
Then the valve is closed. Even after this valve closing, due to the residual air from the switching valve 26 to the tuck-in nozzle 20, the injection amount from the tuck-in nozzle 20 is continuously reduced and is continuously jetted for a predetermined period. Therefore, the weft end portion 7a is kept in the state, In the next beating cycle, the warp yarns 1 that have been beaten are restrained. Therefore, first, the front end of the weft yarn end portion 7a is restrained by the warp yarn 1 and then the base end thereof is restrained. Therefore, the tension at the base end of the weft yarn end portion 7a does not drop below a predetermined value, so that the warp yarn 1 does not pull the tip toward the base end side to cause the loose ear. After that, the switching valve 37 is opened, and the holding nozzle 31 moves to the receiving hole 32.
To prepare for the next cutting of the weft yarn 7.

Second Embodiment As shown in FIG. 10, the front end of the first tuck-in nozzle 21 and the front end of the second tuck-in nozzle 22 are arranged close to each other,
A round rod-shaped body 50 is arranged close to the second tuck-in nozzle 22, and the flow direction of the jet flow is adjusted by the Coanda effect. In this case, even if the axis line l ₂ of the jet flow of the second tuck-in nozzle 22 is parallel to the cloth fell 4, the round rod-shaped body 50 prevents the first and second tuck-in nozzles 2 from moving.
Axis l ₃ merging the jet of 1, 22 is deflected into the front 4 side weave, woven so before forming a 4 and acute.

Third Embodiment As shown in FIG. 11, in this embodiment, the tuck-in selvage assembly 9 including the cutter 40 and the weft guide body 10 are moved back and forth in association with the back and forth movement of the reed 3. Specifically, the tuck-in selvedge device 9 including the cutter 40 on the weft insertion main nozzle 6 side and the weft guide body 10 are attached to the base 51L, and the cutter 40 on the anti-weft insertion main nozzle 6 side is attached.
The tuck-in selvage device 9 including the above is attached to the base 51R, and the bases 51L and 51R are connected to the longitudinal drive units 52L and 52R, respectively, to reciprocate in the extending direction of the warp 1. In this case, the tuck-in ear assembly device 9 including the reed 3 to the cutter 40,
Even if the interference preventing port of the weft guide body 10 or the like is omitted, the bases 51L and 51R move forward so as to escape the reed 3 in the reed stroke (downward movement in FIG. 11), and the tack-in including the cutter 40 is performed. The selvedge device 9, the weft guide body 10 and the reed 3 are prevented from interfering with each other (the position indicated by the chain double-dashed line in FIG. 11), and in the return stroke of the reed 3, the tuck-in selvage device 9 including the cutter 40, the weft guide The bases 51L and 51R are retracted (moved upward in FIG. 11) so as to follow the reed 3 so that the body 10 and the reed 3 do not interfere with each other, the weft yarn 7 is received in the slit 12, and the central back wall 14C is woven. When the cutter 40 is moved near the extension of No. 4 by scissors cutting and the cut weft end 7a is held by the jet flow from the holding nozzle 31, it is further retracted to move the first and second tuck-in nozzles. 21,22 Causing movement relative to 4 before merging the jet weaving to a position at an acute angle (indicated by a solid line position in FIG. 11). Then, at the time of the next weft insertion, the weft end portion 7a is blown into the opening of the warp 1 to form a tack selvage as in the first embodiment. After that, it is advanced to the position indicated by the two-dot chain line.

Fourth Embodiment As shown in FIGS. 12 and 13, this is an example adapted to a middle ear of a multi-width weaving loom such as a double width weaving. That is, the middle ear must form tuck ears for the left and right fabrics,
Center tuck-in selvedge device 9 has left and right woven fabrics 5A and 5B
Tack-in nozzles 20L and 20R for use are mounted. That is, the tuck-in nozzles 20L and 20R are formed on the left and right of the body 11A, and the cutter 40A is arranged between the tuck-in nozzles 20L and 20R, and the operation is the same as that of the first embodiment. The tuck-in nozzle 20L is composed of a first tuck-in nozzle 21L and a second tuck-in nozzle 22L, and a tuck-in nozzle 20R.
Is composed of a first tuck-in nozzle 21R and a second tuck-in nozzle 22R.

The present invention is not limited to the above embodiment,
Although illustration is omitted, for example, the fluid injected from the tuck-in nozzles 20, 20L, 20R and the holding nozzle 31 is not limited to air, but water, a mixed gas of water and air, a harmless gas, or the like can be selected as necessary.

The holding nozzle 31 is adapted to pull the weft yarn end portion by the jetting fluid, but a suction air flow may be used.

Instead of the holding nozzle 31, a spring material is used as the weft end 7a.
Alternatively, the weft end gripping device may be configured to be mechanical so that the clamping is released when the fluid is ejected from the tuck-in nozzles 20, 20L, 20R.

The jet flow may be constantly jetted from the holding nozzle 31.

The injection ports of the tuck-in nozzles 20, 20L, 20R and the holding nozzle 31 may be formed in a long hole, a cross shape, a king shape, a T shape, or a plurality of small hole groups.

The jet flows of the tuck-in nozzles 20, 20L, 20R may be blown to the entire weft yarn end portion 7a.

From the body 11, 11A to the tuck-in nozzle 20, 20
L, 20R may be omitted, and the body 11, 11A including only the weft end gripping device 30 may be combined with a tuck-in needle, or conversely, the weft end gripping device 30 may be omitted from the bodies 11, 11A. The body 11, 11A including only the tuck-in nozzles 20, 20L, 20R and a mechanical weft end gripping device may be combined.

Effect of the Invention In this way, according to the present invention, the entire length of the weft end can be constrained to the warp at substantially the same time or ahead of the base end to the warp. It will not be pulled toward the edge. As a result, it prevents loosening of the ears,
A woven fabric with high quality reliability can be supplied. Moreover, because the jet flow of the first tuck-in nozzle and the jet flow of the second tuck-in nozzle merge, the jet flow as the tuck-in nozzle can be controlled so as to be closer to the weave as it goes from the tuck-in nozzle in the weft inserting direction. Even if the braiding device is arranged close to the warp, the weft end can be satisfactorily tucked in. As a result, the tuck-in selvage device can be arranged close to the warp yarn to shorten the tuck length and provide a good quality woven fabric.

[Brief description of drawings]

FIG. 1 is a plan view showing an essential part of the first embodiment of the present invention in a broken manner, FIG. 2 is a plan view of the same first embodiment, FIG. 3 is a side view of the same first embodiment, and FIG. FIG. 6 is a schematic configuration diagram including the air piping system of the first embodiment, FIG. 5 is a schematic plan view of a fluid jet loom equipped with the tuck-in selvedge device of the first embodiment, and FIGS.
FIG. 10 is an explanatory view of the operation of the first embodiment, FIG. 10 is a plan view showing a second embodiment of the present invention, and FIG. 11 is a fluid jet type equipped with the tuck-in ear assembly device of the third embodiment of the present invention. FIG. 12 is a schematic plan view of a loom, FIG. 12 is a schematic plan view of a fluid jet loom equipped with a tuck-in selvedge device of a fourth embodiment of the present invention, and FIG.
FIG. 14 is a plan view showing a main portion of the fourth embodiment in a broken manner,
The figure is an operation explanatory view of a conventional fluid jet loom. 1 ... warps, 3 ... reed 4 ... cloth fell, 7 ... weft, 7a ... weft end, 20 ... tuck-in nozzles, 21 ... first tuck-in nozzles, 22 ... second tuck-in _nozzles, l _{1, l} 2, l
₃ ... axis.

Claims (1)

[Scope of utility model registration request] 1. A tuck-in selvage device of a shuttleless loom for forming a tuck selvage by blowing an end portion of a weft into a warp opening by a jet flow from a tuck-in nozzle arranged on the side of a warp row. The nozzle is a first tuck-in nozzle in which the axis of the jet flow intersects the cloth fell at an acute angle, and a second tuck-in in which the axis of the jet flow intersects the axis of the jet flow of the first tuck-in nozzle. A tuck-in selvage device for a shuttleless loom, which is configured with a nozzle.