JP3454063B2 - Weft tensioning device in jet loom - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft tension applying device in a jet loom that blows air from a stretch nozzle into a weft catch pipe to catch the weft.

[0002]

2. Description of the Related Art In order to weave a high quality woven cloth, it is necessary to apply an appropriate tension to the weft thread inserted during the beating. To give tension to the weft when beating,
For example, Japanese Utility Model Publication No. 51-88664 and Japanese Utility Model Publication No. 1-11.
In Japanese Patent No. 4686 and the like, a weft tension applying device is provided on the weft insertion end side of a sley of a loom.

In the apparatus disclosed in Japanese Utility Model Laid-Open No. 51-88664, a reflector having several ventilation holes is set on the weft guide passage so that the suction pipe for catching the weft is orthogonal to the weft guide passage. It is installed in. The ventilation holes are formed on the guiding curved surface of the reflector. The guiding curved surface of the reflector guides the air that has flowed through the weft guide passage into the suction pipe, and the tip of the weft yarn inserted into the weft is guided into the suction pipe.

In the device disclosed in Japanese Utility Model Laid-Open No. 1-114686, the shielding plate is arranged so as to traverse the weft guide passage, and the weft catching guide tube is arranged so as to be orthogonal to the weft guide passage. ing. The shield plate guides the air flowing through the weft guide passage into the guide tube, and the tip portion of the weft inserted into the weft is guided into the guide tube.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the device disclosed in Japanese Patent No. 6, since the shielding plate blocks the entire cross section of the weft guide passage, the air flowing through the weft guide passage easily flows out to the open side of the weft guide passage due to the shielding action of the shielding plate. Therefore, there is a drawback in that the tip of the weft that has flown in the weft guide passage does not smoothly enter the guide tube.

In the device disclosed in Japanese Utility Model Laid-Open No. 51-88664, several vent holes suppress the generation of turbulent flow due to the shielding effect of the reflector, but the tip of the weft thread is prevented from entering the vent hole and is good. It is very difficult to set the diameter of the ventilation hole so as to obtain a large turbulent flow generation suppressing effect.

It is an object of the present invention to provide a weft tensioning device that provides an effective tensioning action.

[0008]

To this end, the present invention inserts a weft yarn along a weft guide passage by the air injection action of a weft insertion nozzle, and blows air from a stretch nozzle into the weft catch passage to form the weft yarn. According to the invention of claim 1, the air jet flow from the stretch nozzle intersects the weft guide passage, and the weft guide passage is closer to the weft insertion end side than the air jet flow. the derivatives so as to block a portion of the cross section provided in the weft
A protrusion for changing the protruding position of the dielectric with respect to the yarn guide passage.
An exit position changing means is provided so that a part of the air blown from the weft insertion nozzle flowing through the weft guide passage is guided to the weft catch passage by the guide.

A part of the air flowing through the weft guide passage leaks from a part of the weft guide passage which is not blocked by the guide, and a part of the air flowing through the weft guide passage induces the guide and the stretch nozzle. It is guided into the weft catching passage by the air injection action. Therefore, the tip of the weft is smoothly introduced into the weft guide passage. In addition, the derivative
The cross-section shielding ratio of the thread guide passage can change the protruding position.
It will change accordingly. The shielding ratio of the cross section depends on the weft type, the weft
It is properly adjusted according to the injection pressure of the insertion nozzle.

According to a second aspect of the present invention, the weft catching passage is formed by a weft catching pipe, and an introducing end portion of the weft catching pipe is projected into the weft guide passage, and the introducing end portion serves as the derivative.

Since the introduction end serving as the guide is smoothly connected to the weft catching passage, the guiding efficiency of the guide for guiding a part of the air flowing through the weft guide passage into the weft catching passage is high and simple. It will be composed.

In the invention of claim 3, the derivative is formed such that the inner wall surface of the derivative of claim 3 faces the weft insertion start end side. Air flowing in the weft guide passage is guided to the weft catch passage side along the inner wall surface.

[0013]

In the invention of claim 4, the stretch nozzle is formed in the weft catching block, and the weft catching pipe is slidably inserted into the weft catching block, and the weft catching pipe is provided in the weft catching block. The protruding position changing means including a screw for tightening and fixing is configured.

The insertion position of the catching pipe with respect to the weft catching block can be changed with the screw loosened. By changing the insertion position of the catching pipe with respect to the weft catching block, the shielding ratio of the cross section of the weft guide passage by the guide end, which is the guide, changes.

In the invention of claim 5, the stretch nozzle is formed in the weft catching block, and the derivative is formed in the weft catching block. The configuration of forming the derivative on the weft catching block brings about simplification of the device configuration.

According to a sixth aspect of the invention, the guide is extended from the upper side of the weft guide passage into the weft guide passage. The extension position of the derivative is preferable in accordance with the direction of air injection of the weft-insertion auxiliary nozzle, which is a weft-insertion nozzle.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a deformed reed 12 and an auxiliary deformed reed 13 are erected and fixed on the sley 11. The deformed reed 12 is for forming the woven fabric W, and the auxiliary deformed reed 13 is the throw-back W
for forming e. The weft yarn Y ejected from the weft-insertion main nozzle (not shown) flies in the weft guide passage 121 in front of the deformed reed 12 by the jetting action of the weft-insertion auxiliary nozzle 10. A weft yarn detector 14 is vertically fixed between the deformed reed 12 and the auxiliary deformed reed 13. The weft detector 14 detects whether the weft Y has arrived.

Next to the auxiliary deforming reed 13, a weft catching block 15 is erected. A weft introduction recess 151 is formed on the front surface of the weft catch block 15. The weft introduction recess 151 is on an extension of the weft guide passage 121, and the weft introduction recess 151 becomes a part of the weft guide passage. As shown in FIG. 2, the stretch nozzle 1 is provided in the weft catching block 15.
6 is formed so as to open on the lower wall surface of the weft introduction recess 151. The stretch nozzle 16 is connected to a compressed air supply source (not shown).

A weft catching pipe 17 is slidably inserted in the weft catching block 15 in a direction orthogonal to the weft guide passage 121. Introductory end 1 of weft catching pipe 17
Reference numeral 71 is an opening penetrating the upper wall surface of the weft introduction recess 151. The weft catching pipe 17 is fastened and fixed to the weft catching block 15 by a screw 18 screwed into the weft catching block 15. The weft catching pipe 17 has a shape that extends in the standing direction of the deformed reed 12 and then bends toward the weft guide passage 121, and the end opening of the weft catch pipe 17 is in the direction of the weft guide passage 121, that is, the deformed reed 12 It is open in the direction orthogonal to the beating motion direction.

As shown in FIGS. 2 and 3, the introduction end portion 17 is formed.
1 and the stretch nozzle 16 face each other. The air jetted from the stretch nozzle 16 is jetted toward the introduction end 171 of the weft catching pipe 17. Stretch nozzle 16
Is started before the tip of the weft Y reaches the weft introduction recess 151, and is stopped immediately before beating. The leading end of the weft Y reaches the weft introduction recess 151 because the deformed reed 12
The ejection action of the stretch nozzle 16 that moves integrally with the deformed reed 12 after the start of the repulsion and advancement of the reed is performed almost throughout the forward movement of the stretch nozzle 16.

The introduction end 171 of the weft catching pipe 17 projecting from the upper side of the weft introduction recess 151 into the weft introduction recess 151 is formed by notching the cylinder tip. All of the introduction ends 171 enter the weft introduction recess 151.
The introduction end 171 shields the upper side, which is a part of the cross section of the weft introduction recess 151, and the inner wall surface 1 of the introduction end 171.
72 and a part of the outer peripheral surface of the weft catching pipe 17 are visible from the weft insertion start end side. As shown in FIG. 4, the arc angle θ of the introduction end 171 is 180 °.

The tip portion of the weft Y, which has reached the weft introduction recess 151, is blown into the weft catching pipe 17 by the air flow from the stretch nozzle 16. The weft yarn Y blown into the weft yarn catching pipe 17 is stretch nozzle 1
Tension is applied by the action of drawing the air flow from 6.

The following effects can be obtained in the first embodiment. (1-1) The guide end 171 serving as a guide partly shields the weft guide recess 151, which is a part of the weft guide passage, in the transverse section. Part of the air flowing through the weft guide passage 121 leaks from a part of the cross section of the weft introduction recess 151 which is not blocked by the introduction end 171. In addition, a part of the air flowing through the weft guide passage 121 is part of the inner wall surface 17 of the introduction end 171.
The weft catching pipe 17 serving as a weft catching passage by the guiding action along the line 2 and the air jetting action of the stretch nozzle 16.
Be guided inside. Therefore, the tip of the weft Y is smoothly introduced into the weft catching pipe 17. (1-2) The introduction end portion 171 serving as a derivative is a part of the weft catching pipe 17, and the inner wall surface 172 of the introduction end portion 171 is smoothly connected to the inside of the weft catching pipe 17 serving as the weft catching passage. Therefore, the guiding efficiency of the introduction end portion 171 for guiding a part of the air flowing through the weft guide passage 121 into the weft catching pipe 17 is high, and the structure is simple. (1-3) The inner wall surface 172 of the introduction end 171 faces the weft insertion start end side, and the air flowing through the weft guide passage 121 is guided into the weft catching pipe 17 along the inner wall surface 172. The inner wall surface 172 is an arcuate peripheral surface, and the arcuate peripheral surface shape of the inner wall surface 172 suppresses air leakage to the open side (weft side We side) of the weft introduction concave portion 151. Therefore, the configuration in which the inner wall surface 172 is arranged so as to be seen from the weft insertion start end side contributes to the improvement of the guiding efficiency for guiding a part of the air flowing through the weft guide passage 121 into the weft catching pipe 17. (1-4) Weft introduction recess 151 which is a part of the weft guide passage
The change of the protruding position of the weft catching pipe 17 with respect to is carried out by loosening the screw 18 constituting the protruding position changing means. The shielding ratio of the cross section of the weft introduction recess 151 by the introduction end 171 changes depending on the change of the projecting position of the introduction end 171. The appropriate shielding ratio of the cross section changes depending on the type of weft and the jet pressure of the auxiliary nozzle 10 for weft insertion. Weft type,
If the shielding ratio of the cross section is adjusted according to the injection pressure of the weft-inserting auxiliary nozzle 10, the reliable insertion of the weft tip into the weft catching pipe 17 is ensured. (1-5) The insertion structure for slidably inserting the weft catching pipe 17 into the weft catching block and the protruding position changing means composed of the screw 18 have a simple structure. (1-6) The introduction end portion 171 extends from the upper side of the weft introduction concave portion 151 into the weft introduction concave portion 151, and the upper side of the cross section of the weft introduction concave portion 151 is shielded by the introduction end portion 171. The injection direction of the weft insertion auxiliary nozzle 10 is directed toward the back side and the upper side of the weft guide passage 121, and the weft Y flies on the back side and the upper side of the weft guide passage 121. The introduction end 171 intersects with the flight path of the weft Y, and such an intersecting configuration allows the weft Y to catch the weft Y.
Enhances the effect of guiding inward. That is, the extended position of the introduction end 171 is preferable in accordance with the directionality of the air injection of the weft-insertion auxiliary nozzle 10. (1-7) A part of the outer peripheral surface of the weft catching pipe 17 is seen from the weft insertion start end side, and the weft Y introduced into the weft catching pipe 17 contacts the end edge 175 of the outer peripheral surface and bends. Such a bent state of the weft Y provides the weft Y with a good tensioning action.

In the first embodiment, the arc angle θ of the introduction end portion 171 is set to 180 °, but the arc radius is made larger than 180 ° as in the second embodiment of FIG. The arc radius may be smaller than 180 ° as in the sixth embodiment. Alternatively, as in the fourth embodiment of FIG. 7, the angles θ1 and θ2 measured from the line L representing the direction of the weft guide passage 121 may be θ1> θ2. In the fourth embodiment, the effect of suppressing air leakage to the open side (weft side We side) of the weft introduction recess 151 is enhanced.

Next, a fifth embodiment shown in FIG. 8 will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, the end side of the weft catching pipe 17 has a shape in which the diameter gradually increases. Such a diameter-expanded shape reduces the conduit resistance in the weft catching pipe 17 and facilitates the inflow of air into the weft catching pipe 17. The smoothness of the inflow of air into the weft catching pipe 17 contributes to the improvement of the ease of introducing the weft into the weft catching pipe 17.

Next, a sixth embodiment shown in FIGS. 9A and 9B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, the length of the introduction end 173 of the weft catching pipe 17 in the cylinder direction is longer than that of the introduction end 171 of the first embodiment, and one of the inner wall surfaces 174 of the introduction end 173 is formed. The part is retracted from the upper wall surface of the weft introduction recess 151. The inner wall surface 174 is the weft introduction recess 1
The ratio of shielding the cross section of 51 is larger than the ratio of the inner wall surface 172 of the first embodiment that shields the cross section of the weft introduction recess 151, and the efficiency of guiding the weft Y into the weft catching pipe 17 is improved. Get higher

Next, a seventh embodiment shown in FIGS. 10A and 10B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, a large number of ventilation holes 176 are formed in the introduction end 171 of the weft catching pipe 17. The vent holes 176 suppress the generation of turbulent flow in front of the inner wall surface 172. This suppression of turbulent flow contributes to smooth introduction of the weft yarn into the weft yarn catching pipe 17.

Next, an eighth embodiment shown in FIGS. 11A and 11B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, the introduction end 177 is formed by obliquely cutting the tip of the weft catching pipe 17. The action of introducing the weft into the weft catching pipe 17 by the introduction end portion 177 is the same as in the first embodiment, and the same effect as that of the first embodiment can be obtained.

Next, a ninth embodiment shown in FIGS. 12A and 12B will be described. The same components as those in the eighth embodiment are designated by the same reference numerals. In this embodiment, the guide projection 152 is formed on the lower wall surface of the weft introduction recess 151 on the upstream side of the stretch nozzle 16. The guide protrusion 152 guides the air flowing through the weft guide passage 121 to the inlet of the introduction end 177. The guiding action of the guiding protrusion 152 contributes to smooth introduction of the weft into the weft catching pipe 17.

Next, a tenth embodiment shown in FIGS. 13A and 13B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, the edge of the introduction end 178 of the weft catching pipe 17 extends to the weft inserting end side.

Next, an eleventh embodiment shown in FIGS. 14A and 14B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, the leading end of the introduction end 179 of the weft catching pipe 17 is the weft introduction recess 1
It is in contact with the lower wall surface of 51, and most of the introduction end 179 is arranged so as to come to the open side (weft side We side) of the weft introduction recess 151. Such arrangement of the introduction end portion 179 enhances the effect of suppressing air leakage to the open side of the weft yarn introduction recess 151.

Next, a twelfth embodiment of FIGS. 15A and 15B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, the weft catching pipe 19 is fixed to the weft catching block 15 by penetrating it, and an angle-shaped inductor 20 is fastened and fixed to the upper wall surface of the weft introducing recess 151 with a screw 21. The derivative 20 is on the downstream side of the stretch nozzle 16. The screw 21 passes through the long hole 201, and the weft introduction recess 15
The guide member 20 is screwed to the upper wall surface of the first guide member 1, and the mounting position of the guide member 20 can be adjusted in the passage direction of the weft guide passage 121. The guide piece 202 of the derivative 20 shields a part of the cross section of the weft introduction recess 151, and the air flowing through the weft guide passage 121 is guided by the guide piece 202 into the weft catching pipe 19.

In the twelfth embodiment, the same effect as that of the item (1-1) in the first embodiment can be obtained. or,
The mounting position of the guide 20 in the passage direction of the weft guide passage 121 affects how the air flowing through the weft guide passage 121 is guided into the weft catching pipe 19.
Therefore, the configuration in which the position of the guide 20 can be adjusted in the passage direction of the weft guide passage 121 enables adjustment for properly guiding the air flowing through the weft guide passage 121 into the weft catching pipe 19.

As in the thirteenth embodiment shown in FIGS. 16 (a) and 16 (b), an arc-shaped guide piece 203 is used, or the fourteenth embodiment shown in FIGS. 17 (a) and 17 (b). As described above, the mesh-shaped guide piece 204 may be used. The guiding piece 203 has the same guiding function as the introducing end portion 171 of the first embodiment, and the guiding piece 204 has the introducing end portion 17 of the seventh embodiment.
It has the same induction function as 1.

Next, a fifteenth embodiment shown in FIGS. 18A and 18B will be described. The same components as those in the twelfth embodiment are designated by the same reference numerals. In this embodiment, a guide plate 22 serving as a guide is fastened and fixed to the end face of the weft catching block 15 on the weft insertion end side by screws 23. The screw 23 passes through the long hole 221 and the weft catching block 1
5, the guide plate 22 is vertically adjustable in mounting position. The guide plate 22 has a weft introduction recess 151.
A part of the cross section of the guide plate 22 is shielded, and the shielding ratio can be changed by changing the mounting position of the guide plate 22 in the vertical direction.

In the fifteenth embodiment, the same effects as the items (1-1) and (1-4) in the first embodiment can be obtained .

[0039]

[0040]

Next, a sixteenth embodiment shown in FIGS. 19A and 19B will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, a weft catching block piece 25 having a weft catching pipe 17 is slidably attached to a weft catching block piece 26 having a stretch nozzle 16 in the weft guide passage 121. The weft catching block piece 25 is fixed to the weft catching block piece 26 by tightening the screw 27.

In this embodiment, the weft guide path 1 of the weft catching block piece 25 with respect to the weft catching block piece 26.
The central axis C of the air jet flow from the stretch nozzle 16 is adjusted by adjusting the assembling position of 21 in the passage direction.
1 can be rearranged in the passage direction of the weft guide passage 121.
The proper deviation between the central axis C1 and the center C2 of the introduction end 171 changes depending on the type of weft and the injection pressure of the auxiliary nozzle 10 for weft insertion. If the deviation is adjusted according to the type of weft and the injection pressure of the auxiliary nozzle 10 for weft insertion, the weft catching pipe 1
The secure insertion of the weft thread tip into the 7 is ensured.

[0043]

As described above in detail, in the present invention, a derivative is provided so as to block a part of the cross section of the weft guide passage on the weft insertion end side of the air jet flow of the stretch nozzle intersecting the weft guide passage. Since a part of the air flow flowing through the weft guide passage is guided to the weft catching passage by the guide, the tip portion of the weft is surely introduced into the weft catching passage to effectively tension the weft. It has an excellent effect that it can bring about an imparting action.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment.

FIG. 2 is a side sectional view of a main part.

FIG. 3 is a partially cutaway front view.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is an enlarged plan sectional view of an essential part showing a second embodiment.

FIG. 6 is an enlarged plan sectional view of an essential part showing a third embodiment.

FIG. 7 is an enlarged plan sectional view of an essential part showing a fourth embodiment.

FIG. 8 is a partially cutaway front view showing a fifth embodiment.

FIG. 9 shows a sixth embodiment, and FIG. 9 (a) is an enlarged front sectional view of a main part. (B) is a BB line sectional view of (a).

FIG. 10 shows a seventh embodiment, and FIG. 10 (a) is an enlarged front sectional view of a main part. (B) is CC sectional view taken on the line of (a).

FIG. 11 shows an eighth embodiment, in which (a) is an enlarged front sectional view of a main part. (B) is the DD sectional view taken on the line of (a).

FIG. 12 shows a ninth embodiment, and FIG. 12 (a) is an enlarged front sectional view of a main part. (B) is the EE sectional view taken on the line of (a).

FIG. 13 shows a tenth embodiment, and FIG. 13 (a) is an enlarged front sectional view of a main part. (B) is the FF sectional view taken on the line of (a).

FIG. 14 shows an eleventh embodiment, in which (a) is an enlarged front sectional view of a main part. (B) is the GG line sectional view of (a).

FIG. 15 shows a twelfth embodiment, in which (a) is an enlarged front cross-sectional view of a main part. (B) is the HH sectional view taken on the line of (a).

FIG. 16 shows a thirteenth embodiment, and FIG. 16 (a) is an enlarged front sectional view of a main part. (B) is the II sectional view taken on the line of (a).

FIG. 17 shows a fourteenth embodiment, in which (a) is an enlarged front sectional view of an essential part. (B) is a JJ line sectional view of (a).

FIG. 18 shows a fifteenth embodiment, and FIG. 18 (a) is an enlarged front sectional view of a main part. (B) is a side view of a main part.

[Figure 19] shows a sixteenth embodiment of, (a) shows the main part swash
View . (B) is a horizontal cross-sectional view of a main part .

[Explanation of symbols]

10 ... auxiliary nozzle for weft insertion, which becomes a weft insertion nozzle, 121
... weft guide passage, 15 ... weft catching block, 151 ... weft introducing concave part that is a part of the weft guide passage, 16 ... stretch nozzle, 17, 19, 24 ... weft catching pipe forming the weft catching passage, 171, 173. 174,177,1
Reference numeral 78, 179 ... Lead-in end portion serving as a derivative, 172 ... Inner wall surface, 18 ... Screw constituting the protruding position changing means, 20 ... Guide member, 22 ... Guide plate serving as a derivative, 23 ... Screw constituting protruding position changing means.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-308252 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D03D 47/28-47/30

Claims (6)

(57) [Claims] 1. A weft is produced by the air injection action of a weft insertion nozzle.
Insert the weft along the weft guide passage and into the weft catch passage.
Air is blown from the stretch nozzle to capture the weft
In the weft tensioning device in the jet room
hand, Guide the air jet from the stretch nozzle to the weft yarn
Cross the passage and on the weft insertion end side of the air jet flow
Guide the dielectric so as to block a part of the cross section of the weft guide passage.
Provided,Change the protruding position of the dielectric with respect to the weft guide passage
Equipped with a protruding position changing means for The jet from the weft insertion nozzle flowing through the weft guide passage
A part of the air blown to the weft catching passage by the derivative
With weft tension in a jet loom that is guided
Equipment. 2. The weft catching passage is composed of a weft catching pipe, and an introducing end portion of the weft catching pipe projects into the weft guide passage, and the introducing end portion serves as the derivative. Weft tension applying device in the jet loom described. 3. The weft tension applying device in a jet loom, wherein the inner wall surface of the derivative of claim 2 faces the weft insertion start end side. 4. The stretch nozzle is formed in a weft catching block, and the projecting position changing means has an insertion structure for slidably inserting the weft catching pipe in the weft catching block, and the weft catching pipe in the weft catching pipe. A screw for tightening and fixing to the weft catching block.
2. The weft tension applying device for a jet loom according to claim 2 or claim 3 . 5. The stretch nozzle is formed in a weft catching block, and the derivative is the weft catching block.
Weft tension device in a jet loom according to claim 1 formed. 6. Is the derivative on the upper side of the weft guide passage?
Claim 1 thru | or Claim extended to the inside of the weft guide path
6. The weft tension applying device for a jet loom according to any one of 5 above.