CN116905163A - Weft yarn tension giving device of air jet loom - Google Patents

Weft yarn tension giving device of air jet loom Download PDF

Info

Publication number
CN116905163A
CN116905163A CN202310372040.8A CN202310372040A CN116905163A CN 116905163 A CN116905163 A CN 116905163A CN 202310372040 A CN202310372040 A CN 202310372040A CN 116905163 A CN116905163 A CN 116905163A
Authority
CN
China
Prior art keywords
weft
weft yarn
yarn
reed
shielding member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310372040.8A
Other languages
Chinese (zh)
Inventor
八木大辅
前田光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of CN116905163A publication Critical patent/CN116905163A/en
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/308—Stretching or holding the weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3053—Arrangements or lay out of air supply systems
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/306—Construction or details of parts, e.g. valves, ducts
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

The invention provides a weft tension applying device of an air jet loom, which can inhibit weft from touching a part surrounding a yarn inlet. A weft yarn tension applying device (40) of an air jet loom (10) comprises: a passage forming member (41) that divides a weft yarn flight passage (44) extending along the weft yarn guide passage (17); and an air injection part (42) for injecting air into the weft yarn flying channel in order to capture the front end part of the weft yarn (51) in the channel forming member (41). The weft tension applying device (40) has a shielding member (46) covering the reed blade gap from the back side. When the air jet loom is viewed from the front, the shielding member covers a reed gap from the back side of the reed to the yarn inlet of the weft yarn flight path from the downstream side of the weft yarn detecting device in the weft insertion direction to the upstream side of the yarn inlet, and is a part of the reed gap through which the selvedge yarn does not pass.

Description

Weft yarn tension giving device of air jet loom
Technical Field
The present invention relates to a weft yarn tension applying device for an air jet loom.
Background
The air jet loom picks up weft yarn along a weft yarn guide passage provided in front of the reed. The weft yarn flies in the weft guiding passage from upstream to downstream along the flow of air by the air jet action of the air nozzle. In an air jet loom, in order to weave a fabric having good quality, it is necessary to apply an appropriate tension to a flying weft yarn to suppress the loosening of the weft yarn. As a weft yarn tension applying device for applying tension to a weft yarn, a weft yarn tension applying device described in patent document 1 is known.
The weft yarn tension applying device described in patent document 1 includes: the weft guide device includes a weft flight path extending along the weft guide path, a blowing nozzle that injects air in a direction along the weft flight path, and a stretch air injection port that injects air in a direction different from the direction along the weft flight path.
The air supply nozzle sprays air to guide the weft yarn into the weft yarn flight path. The stretch air jet jets direct weft jet air directed into the weft yarn flight path. By the injection of the air of the stretch air injection port, tension of sufficient strength is imparted to the weft yarn introduced into the weft yarn flight path.
Patent document 1: japanese patent application laid-open No. 2022-14545
If the weft yarn flying in the weft yarn guide passage flies at the back surface of the reed of the weft yarn guide passage due to the air jet action, the weft yarn may hit a portion surrounding the yarn inlet of the weft yarn guide passage, and the weft yarn may not be smoothly introduced into the weft yarn guide passage.
Disclosure of Invention
The weft yarn tension applying device for an air jet loom for solving the above-mentioned problems is provided in an air jet loom which is provided in such a manner that weft yarn is inserted along a weft yarn guide passage provided in a reed, a plurality of reed blades are arranged in the weft yarn insertion direction of the weft yarn, and a weft yarn detecting device for detecting the weft yarn flying in the weft yarn guide passage is provided, and the weft yarn tension applying device is provided in a position on the front end side of the weft yarn inserted into the weft yarn guide passage and on the downstream side of the weft yarn detecting device in the weft yarn insertion direction, and captures the front end of the weft yarn to apply tension to the weft yarn, and includes: a passage forming member that divides a weft yarn flight passage extending along the weft yarn guide passage in the weft yarn guide passage; and an air jetting section for jetting air to the weft yarn flying path so as to catch the tip end portion of the weft yarn in the path forming member, wherein the weft yarn tension applying device includes a shielding member that covers a gap between the reed blades adjacent to each other in the weft insertion direction from a back side of the reed blade, and the shielding member covers at least a part of the gap between the reed blades, which is present from a downstream side of the weft yarn detecting device in the weft insertion direction and an upstream side of a yarn inlet of the weft yarn flying path to the yarn inlet, and which is not passed by warp yarns, when the air jet loom is viewed from a front surface.
Thereby, at the time of weft insertion of the weft yarn, the weft yarn flies in the weft insertion direction in the weft guiding passage by the air jet action of the air jet loom. After the weft yarn flies to the weft yarn detecting device, the weft yarn flies toward a weft yarn flying channel of the weft yarn tension imparting device on the downstream side of the weft yarn detecting device. In the vicinity of the yarn inlet of the weft yarn flight path on the downstream side of the weft yarn detecting device, at least a part of the gap of the reed blades is covered by the shielding member, so that leakage of air to the back side of the reed blades passing through the gap is more suppressed. As a result, when the weft yarn flies near the yarn inlet of the weft yarn flying channel, the weft yarn can be prevented from flying so as to approach the back surface of the reed blade due to the leakage of air to the back surface side of the reed blade. Therefore, the weft can be prevented from striking the portion surrounding the yarn inlet of the weft flight path, and the weft can be smoothly introduced into the yarn inlet of the weft flight path. Then, tension is appropriately applied to the weft yarn by the weft yarn tension applying device.
In the weft tension applying device of the air jet loom, the shielding member may have an upstream end and a downstream end in the weft insertion direction, and the downstream end of the shielding member may be located downstream in the weft insertion direction from the yarn inlet of the weft flight path.
In this way, the shielding member can more favorably suppress leakage of air to the back surface side of the reed blade in the vicinity of the yarn inlet than in the case where the downstream end is located at the same position in the weft insertion direction as the yarn inlet or at the upstream side in the weft insertion direction from the yarn inlet. Therefore, the weft yarn can be more effectively suppressed from flying at the back surface of the reed blade immediately before the yarn inlet of the weft yarn flying channel.
In the weft yarn tension applying device of the air jet loom, the shielding member may cover a portion along the entire vertical direction of the weft yarn guide passage from the back surface side of the reed blade, and may cover a portion along the lower side than the lower end of the weft yarn guide passage from the back surface side of the reed blade.
The inventors have found that, regarding the gap of the reed blade, air easily leaks to the back surface side of the reed blade in the up-down direction from a region along the weft guide passage along a region below the lower end of the weft guide passage. The shielding member shields a portion along the weft guide path from a portion of the gap between the reed blades, which is a portion where air is likely to leak to the back surface side of the reed blades, and which is located below the lower end of the weft guide path. Therefore, the weft yarn can be more effectively suppressed from flying at the back surface of the reed blade by the shielding member.
In the weft yarn tension applying device of the air jet loom, the front surface of the shielding member may be in contact with the back surface of the reed blade.
This can suppress leakage of air from between the front surface of the shielding member and the back surface of the reed blade.
In the weft yarn tension applying device of the air jet loom, the air jet loom may further include a vibration suppressing member having a damper of an elastic member product contacting a back surface of the reed blade, and a mounting portion for mounting the damper to the reed, and the shielding member may function as the vibration suppressing member.
Thus, the vibration suppressing member existing in the air jet loom can be converted into a shielding member. Therefore, for example, since it is not necessary to newly manufacture a shielding member of the weft yarn tension applying device, it is possible to prevent the weft yarn from flying on the back surface of the reed blade without increasing the manufacturing cost of the weft yarn tension applying device.
According to the present invention, the weft yarn can be prevented from hitting the portion surrounding the yarn inlet.
Drawings
Fig. 1 is a perspective view schematically showing a weft yarn tension applying device of an air jet loom.
Fig. 2 is a partial front view showing the weft yarn tension applying device.
Fig. 3 is a side view showing a vibration suppressing member as a reed blade and a shielding member.
Fig. 4 is a perspective view showing the vibration suppressing member.
Fig. 5 is a partial side view showing the yarn inlet of the weft yarn flight path.
Fig. 6 is a partial front view showing the blocking area and the weft tension applying device.
Fig. 7 is a plan sectional view showing the weft yarn tension applying device.
Fig. 8 is a side view showing a shielding member of another example.
Fig. 9 is a plan sectional view showing another example of the air jet loom.
Description of the reference numerals
S … reed space, X … weft insertion direction, 10 … air jet loom, 13 … reed, 15 … reed, 17 … weft guide channel, 30 … vibration suppressing member, 32 … buckle portion, 33 … damper, 33c … upstream end first side, 33d … downstream end second side, 40 … weft tension imparting device, 41 … channel forming member, 42 … air jet portion, 44 … weft flight channel, 44a … yarn inlet, 46 … shielding member, 51 … weft yarn.
Detailed Description
An embodiment of a weft yarn tension applying device of an air jet loom will be described below with reference to fig. 1 to 7.
< air jet loom >)
As shown in fig. 1 and 2, the air jet loom 10 includes: the main nozzle 11 and the sub-nozzle 12, the reed 13, the sley 14, the weft yarn detecting device 20, the vibration suppressing member 30, the weft yarn tension applying device 40, and the shielding member 46. The weft yarn 51 flies in the longitudinal direction of the sley 14. The direction in which the weft yarn 51 flies is referred to as the weft insertion direction X. The upstream side in the weft insertion direction X is the weft insertion start side of the weft yarn 51, and the downstream side in the weft insertion direction X corresponds to the advancing direction of the weft yarn 51.
< Main nozzle, sub nozzle >)
The reed 13 has a weft yarn guide passage 17 extending in the weft insertion direction X. The main nozzle 11 is fixed on the upstream side in the weft insertion direction X of the sley 14. The main nozzle 11 picks up the weft yarn 51 along the weft guiding path 17. The main nozzle 11 is fixed to the sley 14 so as to be adjustable in position.
The sub-nozzles 12 are fixed to sley 14. The sub-nozzles 12 jet air toward the weft guiding passage 17. The jet direction of air from the sub-nozzles 12 is along the weft insertion direction X. The weft yarn 51 flies in the weft insertion direction X in the weft guide passage 17 by the air jet action of the main nozzle 11 and the sub-nozzle 12.
< Reed >)
The reed 13 has a plurality of reed blades 15, and a holding member 16 for holding the plurality of reed blades 15. The plurality of reed wires 15 are arranged in the weft insertion direction X of the weft yarn 51. Accordingly, in the air jet loom 10, it can be said that a plurality of reed blades 15 are arranged in the weft insertion direction X of the weft yarn 51. The reed wires 15 adjacent to each other in the weft insertion direction X are divided by a reed wire gap S which is a gap of the reed wires 15. The reed blade gap S is a gap for passing the warp yarn 52. However, the warp yarn 52 does not pass through the reed gap S located at a position where the weft yarn detecting device 20 and the weft yarn tension applying device 40 described later are provided.
As shown in fig. 3, the reed wire 15 has a concave portion 15a. The concave portion 15a is recessed from the front surface of the reed wire 15 toward the back surface of the reed wire 15. The reed blade 15 has a first edge 15b, a second edge 15c, and a third edge 15d as edges dividing the concave portion 15a. The first edge 15b is located at a position which recedes rearwards from the front surface of the reed blade 15 as viewed from the weft insertion direction X. The first edge 15b extends in the up-down direction of the reed wire 15. The second edge 15c extends from the upper end of the first edge 15b toward the front surface of the reed wire 15. The second edge 15c extends in the front-rear direction of the reed wires 15. The third edge 15d extends from the lower end of the first edge 15b toward the front surface of the reed wire 15. The third edge 15d extends in the front-rear direction of the reed wires 15. Further, the "portion of the backrest surface of the reed wire 15" is a portion closer to the first edge 15b among the portion along the first edge 15b and the portion along the second edge 15c and the third edge 15d. The weft guiding passage 17 is formed by arranging the concave portions 15a of all reed blades 15 in the weft insertion direction X.
As shown in fig. 1, the warp yarn 52 passes through the reed blade gap S between the reed blades 15 adjacent to each other in the weft insertion direction X. The air jet loom 10 weaves a fabric 50 by weft yarns 51 and warp yarns 52. The selvedge yarn 54 passes through the reed gap S on the downstream side in the weft insertion direction X from the weft yarn detecting device 20 described later and on the upstream side from the weft yarn tension applying device 40. The side yarn 54 forms an edging 53 together with the weft yarn 51.
Weft yarn detecting device
The weft yarn detecting device 20 detects the weft yarn 51 flying in the weft yarn guiding passage 17. The weft yarn detecting device 20 is disposed upstream of the edge yarn 54 of the trimming 53 in the weft insertion direction X of the weft yarn 51. The air jet loom 10 as viewed from the front surface is referred to herein as a frontal view. In addition, the case of viewing the air jet loom 10 from the front surface is the same as the case of viewing the reed blades 15 from the front surface. The weft yarn detecting device 20 is disposed upstream of the selvedge yarn 54 of the trimming 53 in the weft insertion direction X, as viewed from the front of the air jet loom 10.
As shown in fig. 2, the weft yarn detecting device 20 includes: the device main body 23, the light projecting section 21, the light receiving section 22, and a control device, not shown, incorporated in the device main body 23. The light projecting section 21 and the light receiving section 22 are disposed at the upper end of the device main body 23. The light projecting section 21 and the light receiving section 22 are connected to a control device, not shown, in a signal manner.
The light projecting portion 21 projects light toward the weft yarn 51 inserted into the weft yarn guide passage 17. The light reflected by hitting the weft yarn 51 or reed blade 15 is received by the light receiving unit 22. For example, when the weft yarn 51 reaches the projection area of the light projecting section 21, the light receiving section 22 receives the reflected light from the weft yarn 51. The control device converts the received information into an electrical signal. The control device outputs an electric signal to a main control unit, not shown. The detection range of the weft yarn 51 of the weft yarn detecting device 20 is the same as the size of the device main body 23 in the weft insertion direction X.
< vibration suppressing Member >)
As shown in fig. 3 and 4, the vibration suppressing member 30 contacts the back surface of the reed wire 15 to suppress vibration of the reed wire 15. The vibration suppressing member 30 has a mounting portion 31 and a damper 33. The mounting portion 31 is long plate-shaped. The mounting portion 31 has a first surface 31a at one end surface in the plate thickness direction and a second surface 31b at the other end surface in the plate thickness direction. The mount 31 mounts the damper 33 to the reed 13.
The mounting portion 31 has a snap portion 32 at an upper end portion. The snap portion 32 is formed to be bent so as to overlap the first surface 31a of the mounting portion 31. The catch 32 is caught by the holding member 16 of the reed 13 from above. The snap 32 is fixed to the holding member 16 by a bolt 34. Thereby, the vibration suppressing member 30 is mounted to the reed 13.
The damper 33 is mounted to the first surface 31a of the mounting portion 31. The damper 33 is provided from the vicinity of the center of the mounting portion 31 in the longitudinal direction to the lower end. The damper 33 is an elastic member product such as rubber.
The damper 33 has a first surface 33a on one end surface in the plate thickness direction and a second surface 33b on the other end surface in the plate thickness direction. The direction in which the short sides of the first surface 33a and the second surface 33b extend is defined as the short side direction of the damper 33. The direction in which the long sides of the first surface 33a and the second surface 33b extend is defined as the long side direction of the damper 33. The short side direction of the damper 33 coincides with the weft insertion direction X. The longitudinal direction of the damper 33 coincides with the up-down direction. The damper 33 has a first side surface 33c at one end surface in the short-side direction and a second side surface 33d at the other end surface in the short-side direction.
The first surface 33a of the damper 33 is engaged with the first surface 31a of the mounting portion 31. The second surface 33b of the damper 33 is pressed against the back surfaces of the plurality of reed blades 15. That is, the front surface of the damper 33 contacts the back surface of the reed wire 15. During the reed beating operation, the vibration of the reed wires 15 is absorbed by the damper 33. That is, the damper 33 suppresses vibration of the reed wire 15. By suppressing the vibration of the reed blade 15 by the vibration damper 33, the decrease in the detection accuracy of the weft yarn 51 by the weft yarn detecting device 20 due to the vibration is suppressed. The damper 33 is attached to the reed blade 15 so as to face the light projecting portion 21 and the light receiving portion 22 of the weft yarn detecting device 20 in the front-rear direction of the reed blade 15.
Weft tension giving device
As shown in fig. 1, the weft yarn tension applying device 40 captures the leading end portion of the weft yarn 51 and applies tension to the weft yarn 51. The weft yarn tension applying device 40 applies an appropriate tension to the weft yarn 51 to suppress the loosening of the weft yarn 51.
The weft tension applying device 40 is disposed on the front side of the reed 13. The weft yarn tension applying device 40 is disposed at a position on the leading end side of the weft yarn 51 inserted into the weft yarn guide passage 17 and downstream of the weft yarn detecting device 20 in the weft insertion direction X of the weft yarn 51. More specifically, the weft yarn tension applying device 40 is disposed at a position on the leading end side of the weft yarn 51 inserted into the weft yarn guide passage 17 and downstream of the selvedge yarn 54 of the trimming 53 in the weft insertion direction X of the weft yarn 51.
As shown in fig. 2, 5, 6 and 7, the weft yarn tension applying device 40 includes a passage forming member 41, an air jetting portion 42 and a shielding member 46. The passage forming member 41 is long cylindrical. The passage forming member 41 is integrated with an upper end portion of the air ejection portion 42. The passage forming member 41 is disposed in the weft guide passage 17. The central axis of the passage forming member 41 extends in the weft insertion direction X. The passage forming member 41 is disposed over the plurality of reed blades 15.
The back surface of the channel forming member 41 is along the first edge 15b of the reed blade 15, and the upper surface of the channel forming member 41 is along the second edge 15c of the reed blade 15. The lower surface of the passage forming member 41 is along the third edge 15d.
Weft flight path 44 is defined in path forming member 41. Accordingly, the passage forming member 41 divides the weft yarn flight passage 44 extending along the weft yarn guide passage 17 at the weft yarn guide passage 17. The yarn inlet 44a of the weft yarn flight path 44 opens on the upstream side in the weft insertion direction X of the path forming member 41. Weft yarn 51 is introduced from yarn inlet 44a to weft yarn flight path 44. The yarn outlet 44b of the weft yarn flight path 44 opens on the downstream side in the weft insertion direction X of the path forming member 41. The weft yarn flight path 44 extends along the weft insertion direction X. Accordingly, the main nozzles 11 and the sub-nozzles 12 jet air in a direction along the weft flight path 44.
As shown in fig. 5, the yarn inlet 44a has first to fourth opening edges 45a to 45d. The first opening edge 45a extends in the up-down direction of the reed wire 15 so as to extend along the first edge 15b of the recess 15a. The second opening edge 45b extends from the upper end of the first opening edge 45a to the front-rear direction of the reed wire 15 so as to follow the second edge 15c of the concave portion 15a. The third opening edge 45c extends from the lower end of the first opening edge 45a to the front-rear direction of the reed wire 15 so as to follow the third edge 15d of the concave portion 15a. The fourth opening edge 45d extends in an arc shape so as to connect the second opening edge 45b and the third opening edge 45 c. In the passage forming member 41, the portions along the first to fourth opening edges 45a to 45d are portions surrounding the yarn inlet 44a of the weft yarn flight path 44. In the reed dent 15, the portion along the first edge 15b, the portion along the second edge 15c, and the portion suppressing the third edge 15d are also portions surrounding the yarn inlet 44a of the weft yarn flight path 44.
As shown in fig. 6 and 7, the weft yarn 51 flying in the weft yarn guide passage 17 flies in the weft yarn flying passage 44. The air jetting portion 42 jets air to the weft yarn flying path 44 in order to catch the tip end portion of the weft yarn 51 in the inside of the path forming member 41. Tension is applied to the weft yarn 51 by jetting air into the channel forming member 41.
< shielding Member >)
The shielding member 46 suppresses leakage of air passing between the reed blades 15 adjacent to each other in the weft insertion direction X. The shielding member 46 also functions as the vibration suppressing member 30. The vibration suppressing member 30 disposed opposite to the weft yarn detecting device 20 is described as a first vibration suppressing member 301. The vibration suppressing member 30 disposed near the yarn inlet 44a of the weft yarn flight path 44 is described as the second vibration suppressing member 302. That is, the shielding member 46 also functions as the second vibration suppressing member 302. Therefore, the shielding member 46 has the mounting portion 31 and the damper 33.
The shielding member 46 is disposed in the vicinity of the weft yarn tension applying device 40. In the shielding member 46, a portion near the second side surface 33d of the damper 33 overlaps the passage forming member 41 in the front-rear direction of the reed wire 15. Therefore, the second side surface 33d of the damper 33 is located on the downstream side in the weft insertion direction X from the yarn inlet 44a of the weft yarn flight path 44.
In the shielding member 46, the first side surface 33c of the damper 33 is located downstream in the weft insertion direction X than the side yarn 54 forming the trimming 53. The edge yarn 54 positioned furthest downstream in the weft insertion direction X among the edge yarns 54 forming the trimming 53 is set as the end edge yarn 54a. The shielding member 46 is disposed in a region from the downstream side of the end side yarn 54a to a position beyond the yarn inlet 44a of the weft yarn flying path 44 in the weft insertion direction X. That is, the shielding member 46 is disposed in a region from the downstream side of the selvedge yarn 54 and the upstream side of the yarn inlet 44a of the weft yarn flight path 44 to the yarn inlet 44a in the weft insertion direction X when the air jet loom 10 is viewed from the front surface.
The shielding member 46 covers the plurality of reed wires 15 arranged in the weft insertion direction X from the back surface side. Therefore, the shielding member 46 covers the reed blade gap S between the adjacent reed blades 15 in the weft insertion direction X from the back surface side of the reed blade 15. When the air jet loom 10 is viewed from the front surface, the shielding member 46 covers a plurality of reed blade gaps S existing from the downstream side of the weft yarn detecting device 20 in the weft insertion direction X and the upstream side of the yarn inlet 44a of the weft yarn flight path 44 to the yarn inlet 44a. The shielding member 46 covers the reed gap S through which the warp yarn 52 does not pass, from the back surface side of the reed 15.
In addition, the downstream end of the weft yarn detecting device 20 in the weft insertion direction X is the downstream end of the detection range of the weft yarn 51 by the weft yarn detecting device 20, as viewed from the front of the air jet loom 10. The shielding member 46 covers a plurality of reed blade gaps S existing from the downstream side of the downstream end of the detection range of the weft yarn detecting device 20 and the upstream side of the yarn inlet 44a of the weft yarn flight path 44 to the yarn inlet 44a in the weft insertion direction X as viewed from the front of the air jet loom 10. The shielding member 46 can also be said to cover the reed wire gap S through which the warp yarn 52 does not pass, from the back surface side of the reed wire 15.
The reed gap S covered with the shielding member 46 is a reed gap S through which the side yarn 54, that is, the warp yarn 52 does not pass. The shielding member 46 covers a plurality of reed gaps S existing from the downstream side of the selvedge yarn 54 and the upstream side of the yarn inlet 44a of the weft yarn flight path 44 to the yarn inlet 44a in the weft insertion direction X as viewed from the front of the air jet loom 10. The shielding member 46 covers the reed blade gap S from the back surface side of the reed blade 15. In the reed 13, a region covered from the back surface side of the reed blade 15 by the damper 33 is set as a shielding region R.
The first side 33c of the damper 33 is the upstream end of the shutter member 46 in the weft insertion direction X. The second side 33d of the damper 33 is the downstream end of the shutter member 46 in the weft insertion direction X. Therefore, the second side surface 33d located at the downstream end of the shielding member 46 is located downstream of the yarn inlet 44a of the weft yarn flight path 44 in the weft insertion direction X.
In the shielding member 46, the second surface 33b of the damper 33 contacts the back surfaces of all reed wires 15 disposed in the shielding region R. That is, the front surface of the shielding member 46 contacts the back surface of the reed blade 15. The damper 33 contacts the back surface of the reed dent 15 in a region from the upper side of the dent 15a to the lower side of the dent 15a and the dent 15a in the back surface of the reed dent 15. Therefore, with respect to the reed blade gap S, the shielding member 46 covers a portion along the up-down direction of the weft yarn guide passage 17 from the back surface side of the reed blade 15, and covers a portion along the lower side than the third edge 15d which is the lower end of the weft yarn guide passage 17 from the back surface side of the reed blade 15. Therefore, the shielding member 46 covers a part of the reed blade gap S from the back surface side of the reed blade 15.
[ effects of the embodiment ]
In the air jet loom 10, at the time of weft insertion of the weft yarn 51, the weft yarn 51 flies in the weft insertion direction X in the weft guide passage 17 by the air jet action of the main nozzle 11 and the sub nozzle 12. After the weft yarn 51 flies to the weft yarn detecting device 20, the weft yarn 51 flies toward the weft yarn flying channel 44 of the weft yarn tension imparting device 40 on the downstream side of the weft yarn 54 in the weft yarn detecting device 20, specifically, in the weft insertion direction X.
In the vicinity of the yarn inlet 44a of the weft yarn flight path 44, the reed blade gap S is covered with the shielding member 46 from the back surface side of the reed blade 15, so that leakage of air to the back surface side of the reed blade 15 can be suppressed. As a result, when the weft yarn 51 flies near the yarn inlet 44a of the weft yarn flying channel 44, the weft yarn 51 can be restrained from flying so as to approach the back surface of the reed blade 15 due to the leakage of the back surface side of the air reed blade 15. Accordingly, the case where the weft yarn 51 collides with the portion including the yarn inlet 44a of the weft yarn flight path 44 is suppressed. In particular, the weft yarn 51 can be suppressed from striking the portions of the first opening edge 45a, the second opening edge 45b, and the third opening edge 45c of the passage forming member 41 that are closer to the back surface of the reed blade 15. Further, the weft yarn 51 is suppressed from striking a portion of the reed blade 15 that is close to the back surface of the reed blade 15, such as the first edge 15b of the reed blade 15. As a result, the weft yarn 51 is smoothly introduced into the yarn inlet 44a of the weft yarn flight path 44. Then, tension is applied to the weft yarn 51 by the weft yarn tension applying device 40.
According to the above embodiment, the following effects can be obtained.
(1) The shielding member 46 shields all reed dent gaps S of the shielding region R from the back side of the reed dent 15. Therefore, in the vicinity of the yarn inlet 44a of the weft yarn flight path 44, leakage of air to the back side of the reed blades 15 through the reed blade gap S can be suppressed more effectively. As a result, in the vicinity of the yarn inlet 44a of the weft yarn flying path 44, the weft yarn 51 can be prevented from flying so as to approach the back surface of the reed dent 15 due to the leakage of air to the back surface side of the reed dent 15. Therefore, in the vicinity of the yarn inlet 44a of the weft yarn flight path 44, the weft yarn 51 can be suppressed from colliding with the portion surrounding the yarn inlet 44a. As a result, the weft yarn 51 can be smoothly introduced into the yarn inlet 44a of the weft yarn flight path 44, and tension can be applied to the weft yarn 51.
(2) The second side surface 33d as the downstream end of the shielding member 46 is located downstream of the yarn inlet 44a of the weft yarn flight path 44 in the weft insertion direction X in the front-rear direction of the reed blade 15. That is, a part of the shielding member 46 passes over the yarn inlet 44a of the weft yarn flying path 44 and is located downstream of the yarn inlet 44a in the weft insertion direction X. Therefore, the shielding member 46 can suppress leakage of air to the back surface side of the reed blade 15 in the vicinity of the yarn inlet 44a more favorably than in the case where the second side surface 33d is located at the same position in the weft insertion direction X as the yarn inlet 44a or is located on the upstream side in the weft insertion direction X from the yarn inlet 44a. Therefore, the weft yarn 51 can be better restrained from flying at the back surface of the reed blade 15 immediately before the yarn inlet 44a of the weft yarn flying channel 44.
(3) With respect to the reed blade gap S, the shielding member 46 covers a portion along the entire vertical direction of the weft guiding passage 17 and a portion along the lower side than the lower end of the weft guiding passage 17. Specifically, with respect to the reed blade gap S, the shielding member 46 covers a portion including the weft yarn guide passage 17 and along the upper and lower sides of the weft yarn guide passage 17 from the back surface side of the reed blade 15.
The inventors have found that, regarding the reed blade gap S, in the up-down direction, in a region along a portion lower than the lower end of the weft guide passage 17 from a portion along the weft guide passage 17, air is liable to leak to the back surface side of the reed blade 15. The shielding member 46 shields a portion along the weft guide passage 17 on the lower side than the lower end of the weft guide passage 17 from a portion of the reed blade gap S where air is likely to leak to the back surface side of the reed blade 15, that is, a portion along the up-down direction. Therefore, the weft yarn 51 can be more favorably suppressed from flying at the back surface of the reed blade 15 by the shielding member 46.
(4) The shielding member 46 is also a second vibration suppressing member 302 that suppresses vibration of the reed wire 15. Therefore, the existing vibration suppressing member 30 can be converted into the shielding member 46. For example, since the shielding member 46 does not need to be newly manufactured, the weft yarn 51 can be suppressed from flying on the back surface of the reed dent 15 without increasing the manufacturing cost of the weft yarn tension applying device 40.
(5) The air jet loom 10 also has a first vibration suppressing member 301. Therefore, the first vibration suppressing member 301 and the second vibration suppressing member 302, which also serves as the shielding member 46, are arranged on the upstream side in the weft insertion direction X of the weft yarn flight path 44. Therefore, the leakage of air to the back surface side of the reed blade 15 is suppressed by the first vibration suppressing member 301 and the second vibration suppressing member 302. Therefore, the first vibration suppressing member 301 and the shielding member 46 can suppress the weft yarn 51 from flying at the back surface of the reed wire 15 at the yarn inlet 44a of the weft yarn flying path 44.
(6) The front surface of the damper 33 of the shielding member 46 contacts the back surface of the reed wire 15. Therefore, the damper 33 suppresses leakage of air from between the front surface of the damper 33 and the back surface of the reed dent 15. As a result, the weft yarn 51 easily flies at a position away from the back surface of the reed blade 15 by the reflection flow of air caused by the damper 33. If the vibration damper 33 is not in contact with the back surface of the reed dent 15, the weft yarn 51 can be more effectively prevented from flying on the back surface of the reed dent 15.
(7) The shielding member 46 blocks the reed blade gap S, so that the selvedge yarn 54 cannot pass through the position where the shielding member 46 is disposed. The larger the shield member 46 is toward the upstream side in the weft insertion direction X, the more the portion that cannot be used for the fabric 50 is, which is not preferable. In the shielding member 46, the first side surface 33c that is the upstream end is located downstream of the edge yarn 54a of the trimming 53 in the weft insertion direction X. That is, the shielding member 46 does not interfere with the position where the trimming 53 is provided. Therefore, by adjusting the arrangement of the shielding member 46, the cost required for knitting the fabric 50 can be suppressed, and the weft yarn 51 can be suppressed from flying at the back surface of the reed dent 15.
(8) The shielding member 46 covers a plurality of reed dent gaps S from the downstream side of the end side yarn 54a of the side yarn 54 among the downstream sides of the weft yarn detecting device 20 in the weft insertion direction X. That is, the shielding member 46 does not cover only the reed blade gap S immediately before the yarn inlet 44a of the weft yarn flight path 44. Accordingly, the weft yarn 51 is restrained from flying so as to approach the back surface of the reed blade 15 from the vicinity of the passing over side yarn 54 to the front of the yarn introducing port 44a.
The present embodiment can be modified as follows. The present embodiment and the following modifications can be combined with each other within a range that is not technically contradictory.
In the shielding member 46, the second surface 33b of the damper 33 may be away from the back surface of the reed wire 15.
The shielding member 46 may have a different structure from the vibration suppressing member 30. As shown in fig. 8, the shielding member 46 includes a support member 47 and a shielding plate 48 supported by the support member 47. The support member 47 is fixed to the sley 14. A shielding plate 48 is fixed to an upper end of the supporting member 47. The shielding plate 48 covers the reed blade gap S from the back surface side of the reed blade 15 in the shielding region R. The shielding plate 48 may be an elastic member such as rubber or a metal plate having no elasticity.
Regarding the reed blade gap S, the shielding member 46 may cover only a portion along the weft yarn guide passage 17 from the back side of the reed blade 15, may cover the weft yarn guide passage 17 from the back side of the reed blade 15, and may cover a portion from the lower end to the lower side of the weft yarn guide passage 17.
The shielding member 46 may cover the entire reed gap S in the up-down direction from the back surface side of the reed wire 15.
The second side surface 33d as the downstream end of the shielding member 46 may be disposed at the same position as the yarn inlet 44a of the weft yarn flight path 44 in the front-rear direction. In this case, the second side surface 33d of the shielding member 46 is not located beyond the yarn inlet 44a of the weft yarn flight path 44, but is located on the same plane as the opening plane of the yarn inlet 44a.
The number of reed blade gaps S covered by the shielding member 46 can also be appropriately changed. For example, the shielding member 46 may cover only the reed gap S closest to the upstream side in the weft insertion direction X with respect to the yarn inlet 44a of the weft yarn flight path 44.
As shown in fig. 9, the air jet loom 10 may be of a type in which the weft yarn tension applying device 40 holds the leading end portion of the weft yarn 51 without using the trimming 53. In this case, the side yarn 54 does not pass through the reed dent gap S through which the side yarn 54 passes in the embodiment. Therefore, when the air jet loom 10 is viewed from the front surface, the shielding member 46 covers the reed gap S existing from the downstream side of the weft yarn detecting device 20 in the weft insertion direction X and the upstream side of the yarn inlet 44a of the weft yarn flight path 44 to the yarn inlet 44a. The shielding member 46 covers at least a part of the reed wire gap S through which the warp yarn 52 does not pass, among the reed wire gaps S.
In this case, the shielding member 46 may cover the entire reed wire gap S existing from the downstream end of the weft yarn detecting device 20 to the yarn inlet 44a, or may cover only a part thereof. With this configuration, the first side surface 33c of the damper 33 can be brought closer to the weft yarn detecting device 20 than in the embodiment. As a result, the size of the shielding member 46 in the weft insertion direction X can be made larger than that of the embodiment.

Claims (5)

1. A weft tension applying device for an air jet loom, which is provided in an air jet loom in which weft yarns are inserted along a weft guide passage provided in a reed, a plurality of reed blades are arranged in the weft insertion direction of the weft yarns, and a weft detecting device for detecting the weft yarns flying in the weft guide passage is provided,
the weft tension applying device is disposed downstream of the weft detecting device in the weft insertion direction at a position on the side of the tip end of the weft inserted into the weft guide passage, captures the tip end of the weft, and applies tension to the weft,
the weft yarn tension applying device comprises:
a passage forming member that divides a weft yarn flight passage extending along the weft yarn guide passage in the weft yarn guide passage;
an air jetting section for jetting air to the weft yarn flying path so as to catch the tip end portion of the weft yarn in the path forming member,
the weft yarn tension imparting device is characterized in that,
the weft tension applying device has a shielding member covering a gap between the adjacent reed blades in the weft insertion direction from the back side of the reed blades,
when the air jet loom is viewed from the front surface, the shielding member covers, from the back surface side of the reed blade, at least a part of the gap between the reed blade and the weft yarn that exists from the downstream side of the weft yarn detecting device in the weft insertion direction and the upstream side of the yarn inlet of the weft yarn flight path to the yarn inlet, and the gap between the reed blade through which warp yarn does not pass.
2. Weft yarn tension applying apparatus for an air jet loom according to claim 1, wherein,
the shielding member has an upstream end and a downstream end in the weft insertion direction, and the downstream end of the shielding member is located downstream in the weft insertion direction from the yarn inlet of the weft yarn flight path.
3. Weft yarn tension applying apparatus for an air jet loom according to claim 1, wherein,
the shielding member covers a portion along the entire vertical direction of the weft guiding path from the back side of the reed blade, and covers a portion along the lower side of the lower end of the weft guiding path from the back side of the reed blade.
4. Weft yarn tension imparting device for an air jet loom according to claim 1, characterized in that
The front surface of the shielding member contacts the back surface of the reed blade.
5. Weft yarn tension applying apparatus for an air jet loom according to claim 1, wherein,
the air jet loom includes a vibration suppressing member having a damper of an elastic member product contacting a back surface of the reed blade, and a mounting portion for mounting the damper to the reed, and the shielding member functions as the vibration suppressing member.
CN202310372040.8A 2022-04-13 2023-04-10 Weft yarn tension giving device of air jet loom Pending CN116905163A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-066306 2022-04-13
JP2022066306A JP2023156763A (en) 2022-04-13 2022-04-13 Weft tensioning device for air jet loom

Publications (1)

Publication Number Publication Date
CN116905163A true CN116905163A (en) 2023-10-20

Family

ID=85727164

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310372040.8A Pending CN116905163A (en) 2022-04-13 2023-04-10 Weft yarn tension giving device of air jet loom

Country Status (3)

Country Link
EP (1) EP4261332A1 (en)
JP (1) JP2023156763A (en)
CN (1) CN116905163A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7206367A (en) * 1972-05-10 1973-11-13
JP4410048B2 (en) * 2004-02-19 2010-02-03 株式会社豊田中央研究所 Weft tension applying device in jet loom
JP6776980B2 (en) * 2017-03-29 2020-10-28 株式会社豊田自動織機 Weft detector for air jet loom
JP2022014545A (en) 2020-07-07 2022-01-20 株式会社豊田自動織機 Weft tensioning device

Also Published As

Publication number Publication date
EP4261332A1 (en) 2023-10-18
JP2023156763A (en) 2023-10-25

Similar Documents

Publication Publication Date Title
EP1722019B1 (en) Weft tension device for jet looms
CN116905163A (en) Weft yarn tension giving device of air jet loom
US5518041A (en) Airguide channel geometry for air jet loom
US20080271807A1 (en) Method and a stretching device for the holding of a weft thread
US4432399A (en) Filling-thread monitoring device for jet looms
EP2455520A2 (en) Profile reed for air jet loom
JP2001336045A (en) Divided reed
US4669514A (en) Air jet weaving machine and weft insertion nozzle arrangement in such air jet weaving machine
US4440198A (en) Apparatus for guiding weft yarns in a jet loom
CN113913999B (en) Weft tension applying device
KR860002102B1 (en) Wefting apparatus in the jet loom
GB2058853A (en) Weft inserting device for shuttleless loom
EP2808431B1 (en) Air jet loom part with weft yarn tension applying apparatus, air jet loom and method of using the air jet loom part
US6014990A (en) Filling yarn stretching device for a loom
US7124782B2 (en) Weaving machine including a selvedge tucking apparatus for weft threads
KR100242925B1 (en) A weft feeler for a water jet loom
JPH0410228Y2 (en)
JPH0121984Y2 (en)
CN111663232B (en) Weft insertion device of air jet loom
JPH07279002A (en) Picking device of air jet loom
JP3546541B2 (en) Loom control device for loom
JP2010285713A (en) Weft tension-imparting device in air jet loom
JPH10204751A (en) Weft tensioner in jet loom
EP1400617A2 (en) Running weft control device of air-jet loom
JPS621269Y2 (en)

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination