JP5689827B2 - Weft tension applying device - Google Patents

Weft tension applying device Download PDF

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Publication number
JP5689827B2
JP5689827B2 JP2012015959A JP2012015959A JP5689827B2 JP 5689827 B2 JP5689827 B2 JP 5689827B2 JP 2012015959 A JP2012015959 A JP 2012015959A JP 2012015959 A JP2012015959 A JP 2012015959A JP 5689827 B2 JP5689827 B2 JP 5689827B2
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Prior art keywords
weft
portion
insertion
passage
direction
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JP2012015959A
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JP2012177216A (en
Inventor
藤雄 鈴木
藤雄 鈴木
牧野 洋一
洋一 牧野
録哉 稲垣
録哉 稲垣
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株式会社豊田中央研究所
株式会社豊田自動織機
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Priority to JP2011019763 priority
Application filed by 株式会社豊田中央研究所, 株式会社豊田自動織機 filed Critical 株式会社豊田中央研究所
Priority to JP2012015959A priority patent/JP5689827B2/en
Publication of JP2012177216A publication Critical patent/JP2012177216A/en
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Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28Looms 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
    • D03D47/30Looms 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
    • D03D47/3066Control or handling of the weft at or after arrival
    • D03D47/308Stretching or holding the weft

Description

  The present invention relates to a weft tension applying device that applies tension to a weft thread inserted.

  In the weft tension applying device, in order to apply an appropriate tension to the weft, for example, there is a device that captures the weft by blowing air from a stretch nozzle into the weft capturing pipe (see, for example, Patent Document 1). In such an apparatus, the injection of the stretch nozzle is started before the front end of the weft reaches the weft introduction recess on the opening side of the weft catching pipe, and is stopped just before the beating.

Japanese Patent Laid-Open No. 10-204751

  However, in this apparatus, since the high pressure air is continuously injected from before the leading end of the weft reaches the weft introduction recess until just before the beating, the amount of air consumption increases and the power consumption increases.

  An object of the present invention is to obtain a weft tension applying device capable of applying an appropriate tension to a weft while suppressing air consumption in consideration of the above facts.

The weft tension applying device according to the first aspect of the present invention is arranged on the downstream side in the weft insertion direction of the weft with respect to the weft insertion passage of the deformed kite and fixed on the sley, and the periphery is surrounded by a wall surface and is inserted into the weft insertion A pressing member capable of gripping a weft holding block in which an insertion passage through which the tip of the weft is inserted penetrates in the weft insertion direction of the weft and an inner surface of the insertion passage. And an air cylinder mechanism that operates the pressing member to grip the tip of the weft, and a weft gripping mechanism that is fixed to the loom frame and grips the tip of the weft by the weft gripping mechanism. Tension for applying tension to the weft by the relative displacement of the deformed scissors in contact with the weft between the deformed scissors and the weft gripping mechanism when the deformed scissors swing in the beating direction. and imparting member, the possess, before The tension applying member extends from the front side of the weave to the direction between the deformed kite and the weft gripping mechanism, and contacts the weft when the deformed kite swings in the striking direction. And a guide portion that guides the deformation rod in the vertical direction with respect to the height position of the weft insertion passage of the deformation rod, and the guide portion is provided on the front side of the weave, and the deformation along the swinging direction of the deformation rod. An arcuate portion formed in an arc shape so as to coincide with the trajectory of the rocking motion of the bag .

According to the weft tension applying device of the present invention described in claim 1, the weft gripping mechanism portion is disposed on the downstream side in the weft insertion direction of the weft with respect to the weft insertion passage of the deformed rod and is fixed on the sley. . In this weft gripping mechanism, an insertion path surrounded by a wall surface is formed in the weft gripping block so as to penetrate in the weft insertion direction, and the tip of the weft thread inserted is inserted into the insertion path and pressed. The member can grip the tip of the weft between the inner surface of the insertion passage, and the air cylinder mechanism operates the pressing member to grip the tip of the weft. On the other hand, the tension applying member is fixed to the loom frame, and when the leading end of the weft is gripped by the weft gripping mechanism and when the deformed kite swings in the strike direction, the deformed kite and the weft gripping mechanism A tension is applied to the weft by contact with the weft and relative deformation with the deformed kite. For this reason, air is consumed only when the weft is gripped.
Further, according to the weft tension applying device, the guide portion of the tension applying member contacts the weft when the deformed kite swings in the strike direction, and the contact portion of the weft is positioned at the height position of the weft insertion passage of the deformed kite. Guide up and down. As a result, the weft is stretched and tension is applied to the weft. Here, since the tension applying member extends in the direction from the pre-weaving side to the space between the deformed kite and the weft gripping mechanism, the tip of the weft is inserted into the weft gripping mechanism when the deformed kite swings. When inserted into the passage (in other words, before the weft contacts the guide portion of the tension applying member and before the tip of the weft is gripped by the weft gripping mechanism), the air flow for weft insertion Enters the insertion path of the weft gripping mechanism portion without being blocked by the tension applying member separated to the front side of the weave (without colliding). For this reason, even if a tension applying member is provided for applying tension to the weft, smooth weft insertion can be performed.
Further, according to this weft tension applying device, the arcuate portion of the tension applying member is provided on the front side of the guide portion, and the locus of the swinging motion of the deformed kite along the swinging direction of the deformed kite. Therefore, in the state where the weft is in contact with the arc-shaped portion, the amount of weft stretching is kept constant even if the deformed rod changes its position due to swinging.
According to a second aspect of the present invention, there is provided a weft tension applying device according to the present invention, which is arranged on the downstream side in the weft insertion direction of the weft with respect to the weft insertion passage of the deformed kite and fixed on the sley, and is surrounded by a wall surface. A pressing member capable of gripping a weft holding block in which an insertion passage through which the tip of the weft is inserted penetrates in the weft insertion direction of the weft and an inner surface of the insertion passage. And an air cylinder mechanism that operates the pressing member to grip the tip of the weft, and a weft gripping mechanism that is fixed to the loom frame and grips the tip of the weft by the weft gripping mechanism. Tension for applying tension to the weft by the relative displacement of the deformed scissors in contact with the weft between the deformed scissors and the weft gripping mechanism when the deformed scissors swing in the beating direction. and imparting member, the possess, before The width direction both ends of the 1st site | part which hold | grips the front-end | tip part of the said weft with the said pressing member in a part of inner surface of the insertion path are said insertion paths with respect to the said 1st site | part in a part of inner surface of the said insertion path The second portion is set on the outer side in the width direction than the second portion adjacent to both sides in the insertion direction, and the second portion constitutes the minimum width portion of the insertion passage, and the insertion passage is inserted in the insertion direction of the insertion passage. As seen, the width dimension of the tip portion of the pressing member is set to be larger than the width dimension of the second portion .
According to the weft tension applying device of the present invention as set forth in claim 2, the weft gripping mechanism is disposed on the downstream side in the weft insertion direction of the weft with respect to the weft insertion passage of the deformed kite and is fixed on the sley. . In this weft gripping mechanism, an insertion path surrounded by a wall surface is formed in the weft gripping block so as to penetrate in the weft insertion direction, and the tip of the weft thread inserted is inserted into the insertion path and pressed. The member can grip the tip of the weft between the inner surface of the insertion passage, and the air cylinder mechanism operates the pressing member to grip the tip of the weft. On the other hand, the tension applying member is fixed to the loom frame, and when the leading end of the weft is gripped by the weft gripping mechanism and when the deformed kite swings in the strike direction, the deformed kite and the weft gripping mechanism A tension is applied to the weft by contact with the weft and relative deformation with the deformed kite. For this reason, air is consumed only when the weft is gripped.
Further, according to the weft tension applying device, both ends in the width direction of the first portion that grips the front end portion of the weft together with the pressing member at a part of the inner surface of the insertion path are the first part of the inner surface of the insertion path. The second portion adjacent to both sides of the insertion passage in the insertion direction of the insertion passage is set on the outer side in the width direction, and the second portion constitutes the smallest width portion of the insertion passage. Since the width dimension of the front end portion of the pressing member is set to be larger than the width dimension of the second portion when viewed in the insertion direction, the weft thread in the insertion path can be reliably gripped.

According to a third aspect of the present invention, there is provided the weft tension applying device according to the first or second aspect of the present invention, wherein the insertion passage has a passage sectional area of the weft insertion passage of the deformed rod with an opening area of the inlet portion. The cross-sectional area of the passage is gradually reduced from the inlet side toward the part that grips the tip of the weft.

According to the weft tension applying device of the present invention described in claim 3 , since the opening area of the insertion portion is set to be equal to or larger than the passage cross-sectional area of the weft insertion passage of the deformed rod, the front end of the weft yarn The part can smoothly enter the insertion path from the weft insertion path of the deformed rod. Further, since the insertion passage is formed so that the passage cross-sectional area gradually decreases from the inlet side toward the portion where the tip of the weft is gripped, the position where the tip of the weft is gripped in the insertion passage It is possible to smoothly enter the direction and suppress the operation stroke of the pressing member.

Weft tension device of the present invention according to claim 4, in the structure according to any one of claims 1 to 3, wherein the pressing member, from the tip continuously at its distal end A small-diameter portion having a small diameter is formed, and at least a part of the small-diameter portion is disposed in the insertion passage when the pressing member grips the tip of the weft yarn between the inner surface of the insertion passage. Is set to be.

According to the weft tension applying device of the present invention described in claim 4 , the small-diameter portion of the pressing member is set to have a smaller diameter than the tip portion continuously from the tip portion of the pressing member, and the pressing member is the weft yarn. In the state where the tip end portion of the pressing member is gripped between the inner surface of the insertion passage, at least part of the small diameter portion of the pressing member is disposed in the insertion passage. A gap is formed between them. For this reason, even if the air flow to be inserted in the weft holding state enters the insertion path, the backflow can be suppressed, and the weft holding performance is further stabilized.

A weft tension applying device according to a fifth aspect of the present invention is the configuration according to any one of the first to fourth aspects, wherein a plurality of the tension applying members are juxtaposed along the weft insertion direction of the weft. Each tension applying member is in contact with the weft when the deformed kite swings in the strike direction, and guides the contact portion of the weft in the vertical direction with respect to the height position of the weft insertion passage of the deformed kite. At the same time, the guide direction is set upside down with respect to other adjacent tension applying members.

According to the weft tension applying device of the present invention described in claim 5 , a plurality of tension applying members are arranged in parallel along the weft insertion direction of the wefts, and each tension applying member is arranged in the direction in which the deformed wrinkles are beaten. In contact with the weft during swinging, the contact portion of the weft is guided in the vertical direction with respect to the height position of the weft insertion passage of the deformed rod, and the guide direction is set upside down with other adjacent tension applying members. Therefore, the amount of weft stretch can be easily set large.

According to a sixth aspect of the present invention, there is provided a weft tension applying device according to the present invention, wherein the weft tension imparting device according to any one of the first to fifth aspects is located downstream of the weft insertion direction of the deformed rod in the weft insertion direction. An exhaust port is provided adjacent to the detection surface of the weft detection sensor for detecting the weft and the exhaust air supplied to the air cylinder mechanism is used. An air passage portion is formed for ejection from the ejection port.

According to the weft tension applying device of the present invention described in claim 6 , an outlet is provided adjacent to the downstream side in the weft insertion direction of the weft in the weft insertion passage of the deformed kite, and the outlet is used for detecting the weft. The exhaust air that is supplied to and used by the air cylinder mechanism is ejected from the ejection port toward the weft detection sensor through the air passage portion. For this reason, the weft detection sensor is cleaned, and the reliability of the weft detection sensor is ensured.

Weft tension device of the present invention according to claim 7, in the structure according to any one of claims 1 to 6, the weft insertion in the vertical direction, and the weft said tensile force applying member by the motor drive The loom frame is provided with a moving mechanism that moves in a horizontal direction orthogonal to the direction.

According to the weft tension applying device of the present invention as set forth in claim 7 , the loom frame has a moving mechanism for moving the tension applying member in the vertical direction and the horizontal direction perpendicular to the weft inserting direction of the weft by driving the motor. Since it is provided, it is easy to set the position of the tension applying member according to the type of weft and the weft insertion condition.

The weft tension applying device according to an eighth aspect of the present invention is the configuration according to any one of the first to seventh aspects, wherein the front end of the weft is between the pressing member in the insertion path. The relationship between the passage sectional area Sb of the gripped portion and the passage sectional area Sa of the weft insertion passage of the deformed rod is set to 0.2Sa ≦ Sb ≦ 0.7Sa.

According to the weft tension applying device of the present invention as set forth in claim 8 , the passage cross-sectional area Sb of the portion where the tip of the weft is gripped between the insertion member and the pressing member and the passage breakage of the weft insertion passage of the deformed rod Since the relationship with the area Sa is set to 0.2Sa ≦ Sb ≦ 0.7Sa, the stroke of the pressing member is ensured while ensuring ease of insertion when the weft is inserted toward the gripping position in the insertion path. The response is good because of short.

  As described above, the weft tension applying device according to the present invention has an excellent effect that an appropriate tension can be applied to the weft while suppressing air consumption.

It is a perspective view which shows the weft tension | tensile_strength provision apparatus which concerns on the 1st Embodiment of this invention in the state at the time of the end of weft insertion. It is a perspective view which shows the weft tension | tensile_strength imparting apparatus which concerns on the 1st Embodiment of this invention in the tension | tensile_strength provision state to a weft. It is a longitudinal cross-sectional view of the front view which shows the principal part of the weft tension | tensile_strength provision apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the lower part of the weft grip pin and the weft grip passage of the weft tension applying device according to the first embodiment of the present invention. FIG. 4A is an exploded perspective view. FIG. 4B is a longitudinal sectional view showing a state in which the weft is gripped as seen from the insertion direction of the insertion path. It is a longitudinal cross-sectional view of the principal part of the weft tension | tensile_strength provision apparatus which concerns on the 2nd Embodiment of this invention in the tension | tensile_strength provision state to a weft. It is a perspective view which shows the installation state of the tension | tensile_strength provision arm in the weft tension | tensile_strength provision apparatus which concerns on the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of front view which shows the principal part of the weft tension | tensile_strength imparting apparatus which concerns on the 3rd Embodiment of this invention in the tension | tensile_strength provision state to a weft. It is a top view which shows the principal part of the weft tension providing apparatus which concerns on the 4th Embodiment of this invention. It is an action figure of the side view for explaining an operation of the weft tension applying device concerning a 5th embodiment of the present invention. It is an action | operation figure of the side view for demonstrating the effect | action of the weft tension | tensile_strength provision apparatus which concerns on the 6th Embodiment of this invention. It is a longitudinal cross-sectional view of the side view which shows the principal part of the weft tension applying apparatus which concerns on the 7th Embodiment of this invention. It is a side view which shows the principal part of the weft tension providing apparatus which concerns on the 8th Embodiment of this invention. It is a graph which shows the relationship between passage cross-sectional area ratio and the response time of a weft grip pin. It is a graph which shows the relationship between passage cross-sectional area ratio and the ease of entering the weft into a weft grip passage. It is a figure for demonstrating the passage cross-sectional area ratio of FIG.13 and FIG.14. FIG. 15A shows the cross-sectional area of the weft insertion passage of the deformed rod. FIG. 15B shows the cross-sectional area of the weft gripping passage. It is a perspective view which shows the weft tension | tensile_strength provision apparatus which concerns on the 9th Embodiment of this invention in the state at the time of the end of weft insertion. It is a perspective view which shows the weft tension | tensile_strength imparting apparatus which concerns on the 9th Embodiment of this invention in the tension | tensile_strength provision state to a weft. It is a longitudinal cross-sectional view of a front view showing a main part of a weft tension applying device according to a ninth embodiment of the present invention. It is the longitudinal cross-sectional view of the side view shown in the state which cut | disconnected the weft tension | tensile_strength provision apparatus which concerns on the 9th Embodiment of this invention in the position of the weft grip passage. It is the longitudinal cross-sectional view of the side view which shows the weft tension | tensile_strength provision apparatus which concerns on the 9th Embodiment of this invention in the state cut | disconnected by the arrangement | positioning position vicinity of the tension | tensile_strength provision arm. It is a front view which shows the pin holder of the weft tension applying apparatus which concerns on the 9th Embodiment of this invention.

[First Embodiment]
A weft tension applying device according to a first embodiment of the present invention will be described with reference to FIGS. In these drawings, an arrow FR shown as appropriate indicates the weaving side of the loom, an arrow UP indicates the upper side of the loom, and an arrow IN indicates the weft insertion direction of the weft.

  FIG. 1 is a perspective view showing a state in which the weft tension applying device 30 is mounted on the loom 10 (only a part is shown in the drawing). As shown in FIG. 1, the loom 10 includes a sley 12 extending in the left-right direction when viewed from the front. The sley 12 is swingable about a left-right axis of the loom 10 (see the arrow A direction), and a groove 12A is formed on the upper surface side along the longitudinal direction. In the groove portion 12 </ b> A of the sley 12, the lower end portion of the deformed rod 16 is fastened and fixed by the wedge member 14. That is, the deformation rod 16 is erected and fixed on the sley 12 and can swing with the sley 12.

  Further, the deformed kite 16 includes a large number of kites 18 whose longitudinal direction is the standing direction, and these kites 18 are arranged side by side in the left-right direction of the loom 10. In the wing 18, a substantially U-shaped (concave) guide hole 18 </ b> A that opens to the front side of the loom 10 is formed. These guide holes 18 </ b> A form a weft insertion passage 20 that communicates with the loom 10 in the left-right direction. The weft insertion passage 20 includes a plurality of sub-nozzles 22 for weft insertion (only one is shown in the drawing) supplied from the main nozzle for weft insertion (not shown) on the left side of the loom 10 when viewed from the front. It is a passage that flies by relay injection action.

  The weft Y is pulled out from a winding portion in a weft storage device (not shown) on the left side of the loom 10 when viewed from the front. Further, the weft Y is injected and supplied and then stopped by a weft locking pin (not shown) on the yarn supply side (left side in FIG. 1), so that the supply amount (the length of the weft Y) at each weft insertion becomes constant. ing.

  A weft detection sensor 24 (weft detector) that is used for detecting the weft Y adjacent to the downstream side in the weft insertion direction of the weft Y in the weft insertion passage 20 of the deformed kite 16 is disposed on the front side of the deformed kite 16. . The weft detection sensor 24 is erected and fixed on the front side of the sley 12, and is disposed between the ground warp T1 for forming the woven fabric W1 and the ear thread T2 for forming the discarded ear W2. This weft detection sensor 24 has a detection area in the weft insertion path 20 with its detection surface facing the weft insertion path 20 and detects whether or not the weft Y has reached in the weft insertion path 20. ing. The weft detection sensor 24 is connected to a control unit 62 (illustrated as a block in the drawing) and outputs a detection result to the control unit 62.

  On the downstream side in the weft insertion direction of the weft Y with respect to the weft insertion passage 20 of the deformation rod 16, a weft grasping block 34 of the weft grasping mechanism portion 32 is disposed with a slight gap between the deformation rod 16 and the weft insertion passage 20. . The weft grip block 34 of the weft grip mechanism 32 is fixed on the sley 12. The weft gripping mechanism 32 constitutes a part of the weft tension applying device 30, and an insertion passage 38 through which the tip of the weft Y inserted is inserted is formed in the weft gripping block 34. .

  The insertion passage 38 is formed so as to be surrounded by a wall surface, and the opening area of the inlet portion 38A is equal to or larger than the passage cross-sectional area of the weft insertion passage 20 of the deformed rod 16 (in this embodiment, as an example, about The weft introduction passage 40 is set so that the cross-sectional area of the passage gradually decreases (squeezes) from the inlet portion 38A side to a portion (details will be described later) side that grips the tip of the weft Y. Is formed. As shown in FIG. 3, a rectangular weft gripping passage 42 is formed in the insertion passage 38 continuously with the tapered weft introduction passage 40 in the sectional view of FIG. 3.

  Further, the open passage 43 on the downstream side of the weft gripping passage 42 has a tapered shape that widens toward the end, and has a shape in which the passage cross-sectional area is gradually enlarged. The weft introduction passage 40, the weft gripping passage 42, and the release passage 43 are on an extension line of the weft insertion passage 20 of the deformed kite 16, and they constitute a weft guide passage 25 together with the weft insertion passage 20 of the deformation kite 16. .

  An air cylinder mechanism 44 is disposed above the weft gripping block 34. The cylinder 46 of the air cylinder mechanism 44 is hollow inside, and a stopper 48 is press-fitted into the upper opening of the cylinder 46. A weft grip pin 50 as a pressing member is disposed inside the cylinder 46.

  The weft gripping pin 50 is configured such that a short cylindrical piston portion 50P is coaxially and integrally provided at one axial end portion (the upper end portion in the present embodiment) of a pin body 50H having a small diameter and a substantially round bar shape. The internal space of the cylinder 46 is divided into two chambers by a piston portion 50P. The front end 50A side of the pin main body 50H of the weft gripping pin 50 is disposed in the weft gripping passage 42 through a part of the bottom wall portion 46A of the cylinder 46 and the weft gripping block 34. A communication hole 52A formed in the shaft core portion of the bottom wall portion 46A and penetrating through the tip 50A side of the pin main body 50H has a larger diameter than the pin main body 50H, and the weft gripping block 34 has a communication hole 52A. A communication hole 52B that communicates with the weft holding passage 42 is formed coaxially and with the same diameter as the communication hole 52A. Thus, the configuration is such that the weft gripping pin 50 can be moved in the axial direction (in the present embodiment, the vertical movement perpendicular to the weft gripping passage 42) in a pressurized state by air. That is, the weft gripping pin 50 can grip the front end portion of the weft Y between the inner surface (inner wall surface) of the weft gripping passage 42 (insertion passage 38), and the air cylinder mechanism 44 has the weft gripping pin 50. Is operated to grip the tip of the weft Y.

  Further, the relationship between the passage cross-sectional area Sb of the portion of the insertion passage 38 where the tip of the weft Y is gripped between the weft gripping pin 50 and the passage cross-sectional area Sa of the weft insertion passage 20 of the deformed rod 16 is 0.2 Sa. It is preferable that ≦ Sb ≦ 0.7Sa is set. In this embodiment, the passage sectional area Sb of the weft gripping passage 42 is about 30% of the passage sectional area Sa of the weft insertion passage 20.

  FIG. 4 shows the lower portion of the weft gripping pin 50 and the weft gripping passage 42. As shown in FIG. 4, the width dimension 50W of the distal end portion 50A of the weft gripping pin 50 as viewed in the insertion direction of the insertion passage 38 is the front and rear in the insertion direction of the portion that grips the distal end portion of the weft Y in the insertion passage 38. It is set to be larger than the width dimension (38 W) at the part. In other words, the width dimension 50W of the tip 50A of the weft gripping pin 50 as viewed in the insertion direction of the insertion path 38 is set to be larger than the minimum width dimension 38W of the insertion path 38.

  Further, the weft grip pin 50 is formed with a small-diameter portion 50B having a diameter smaller than that of the tip portion 50A and continuing from the tip portion 50A. When the weft gripping pin 50 grips the tip of the weft Y between the inner surface (inner wall surface) of the weft gripping passage 42 (insertion passage 38), at least a part of the small diameter portion 50B is inserted into the weft gripping passage 42 (insertion). It is set to be disposed in the passage 38).

  Further, as shown in FIG. 3, a compression coil spring 54 (“return spring”, in the broad sense “attached” between the bottom wall portion 46A of the cylinder 46 and the piston portion 50P is provided on the outer peripheral side of the weft gripping pin 50. Elements that are grasped as “means of force” are wound. One end portion (lower end portion) of the compression coil spring 54 is abutted and locked to the bottom wall portion 46A of the cylinder 46, and the other end portion (upper end portion) is abutted and locked to the end surface (bottom surface) of the piston portion 50P. ing. Therefore, the compression coil spring 54 can press and urge the piston portion 50P in the direction (in FIG. 3, which is always away from the bottom wall portion 46A) and press against the stopper surface 48A of the stopper 48. Thus, the weft gripping pin 50 cannot grip the tip of the weft Y between the inner surface of the weft gripping passage 42 (insertion passage 38) when the piston portion 50P is not pressurized from the upper side ( It is held at a non-gripping position (not shown).

  One end of a tubular air tube 56 is connected to the upper end of the weft holding block 34 to supply air to the upper chamber of the cylinder 46 or to discharge air from the upper chamber of the cylinder 46. The other end of the air tube 56 is connected to either the air supply port 58A or the exhaust port 58B of the three-port solenoid valve 58. The cylinder 46 can be connected to an air supply source 60 (blocked in the drawing) via an air tube 56 and an air supply port 58A of the three-port solenoid valve 58. The 3-port solenoid valve 58 is connected to the control unit 62. The control unit 62 performs control so as to switch the port of the three-port solenoid valve 58 connected to the other end of the air tube 56 at a preset setting timing, and controls the three-port solenoid valve 58, whereby the weft yarn The direction of raising and lowering of the grip pin 50 can be controlled. Control is performed so that when the leading end of the weft Y reaches the weft gripping passage 42, the weft gripping pin 50 grips the leading end of the weft Y between the inner surface of the weft gripping passage 42 (insertion passage 38). The

  The control unit 62 may control to switch the port of the three-port solenoid valve 58 connected to the other end of the air tube 56 at a predetermined timing according to the swing angle of the sley 12. Even if it is controlled to switch the port of the three-port solenoid valve 58 connected to the other end of the air tube 56 at a predetermined timing calculated based on the timing of the weft Y injection supply and the flying speed of the weft Y. Good.

  On the other hand, as shown in FIG. 1, a tension applying arm 64 as a tension applying member is installed on the front side of the weaving machine 10 with respect to the space between the deformed kite 16 and the weft holding block 34. The tension applying arm 64 has a base end portion 64A fixed to the mounting base 28 by fastening with a screw 29, and is fixed to the loom frame 26 via the mounting base 28, and the deformed kite 16 and the weft gripping mechanism portion 32 from the pre-weaving side. It is extended in the direction toward. The loom frame 26 constitutes a stationary portion that is not displaced even when the deformation rod 16 is swung. As a result, the tension applying arm 64 is in a state in which the tip of the weft Y is gripped by the weft gripping mechanism portion 32 and between the deformed scissors 16 and the weft gripping mechanism portion 32 when the deformed scissors 16 swing in the strike direction ( Between the downstream end in the weft insertion direction of the deformed kite 16 and the upstream end in the weft inserting direction of the weft gripping mechanism portion 32), a tension is applied to the weft Y by relative displacement with the deformed kite 16 in contact with the weft Y. (See FIG. 2).

  Further, the tension applying arm 64 is formed in a thin plate shape, and the left and right direction of the loom 10 is disposed in the plate thickness direction, the tip end portion 64B is formed in an arc shape, and the upper side portion on the tip end portion 64B side is in the longitudinal direction. The guide portion 64C is gently inclined upwardly toward the base end portion 64A. The guide portion 64C comes into contact with the weft Y when the deformation rod 16 swings in the beating direction and guides the contact portion of the weft Y upward with respect to the height position of the weft insertion passage 20 of the deformation rod 16. (See FIGS. 2 and 3). Further, in the present embodiment, the portion of the upper side portion of the tension applying arm 64 that continues to the side opposite to the tip portion 64B side of the guide portion 64C extends substantially horizontally.

(Action / Effect)
Next, the operation and effect of the above embodiment will be described.

  When weft Y is supplied (injected) from a main nozzle for weft insertion (not shown) on the left side of the loom 10 shown in FIG. 1, a plurality of sub-nozzles 22 for weft insertion (only one is shown in the figure). The weft Y travels through the weft insertion passage 20 by the relay injection action. When the leading end of the weft Y reaches a predetermined position on the fabric end side, the weft detection sensor 24 detects the arrival of the weft Y, and the detection result is output to the control unit 62. The front end portion of the weft Y is inserted into the insertion passage 38 of the weft gripping block 34 by the injection action (jet flow) of the sub nozzle 22 installed on the downstream side, and passes through the weft introduction passage 40 in the insertion passage 38. Thereafter, at the stage of passing through the weft holding passage 42, the base end side of the weft Y is stopped by a weft locking pin (not shown) on the yarn supply side (left side in FIG. 1), and the leading end of the weft Y stops.

  Thereafter, at a preset timing, the port of the 3-port solenoid valve 58 connected to the air tube 56 shown in FIG. 3 is switched from the exhaust port 58B to the air supply port 58A. When supplied into the cylinder 46, the weft gripping pin 50 is pushed down by this atmospheric pressure. Then, the weft grip pin 50 is operated by the air cylinder mechanism 44, whereby the tip of the weft Y is gripped between the tip 50 A of the weft grip pin 50 and the inner surface of the weft grip passage 42.

  When the deformed kite 16 swings in the beating direction in this gripping state, the deformed kite 16 and the weft holding block 34 shown in FIG. The tension applying arm 64 is in contact with the deformed rod 16 and the weft holding mechanism 32. When the deformed kite 16 and the like further move to the front side of weaving, the weft Y is supported by the tension applying arm 64, and the contact portion of the weft Y shown in FIG. While being guided upward with respect to the height position of the insertion passage 20, a part of the weft Y is bent into an inverted V shape. In other words, the weft Y is supported by the tension applying arm 64 and is given a tension by the relative displacement between the tension applying arm 64 and the deformation rod 16.

  Thereafter, in the vicinity of a crank angle of 300 °, a predetermined tension is applied to the weft Y on the side opposite to the yarn supply side of the fabric, and the ear yarn T2 at the end of the fabric is closed. In the initial stage, the inverted V-shape of the weft Y described above is the upper wall of the weft insertion passage 20 of the deformed rod 16 shown in FIG. 3, the weft gripping position by the weft gripping pin 50, and the tension applying arm 64. The upper side portion serves as a fulcrum, and thereafter, the upper end of the inlet portion 38A of the weft introduction passage 40 also serves as a fulcrum, and tension is applied to the weft Y using these as fulcrums.

  After that, after the weft Y is beaten, the control of the control unit 62 stops the energization of the three-port solenoid valve 58 so that the weft Y gripping force by the weft gripping pin 50 is loosened, and the air tube 56 is connected at the same time. The port of the 3-port solenoid valve 58 is switched from the air supply port 58A to the exhaust port 58B, and high-pressure air is discharged from the exhaust port 58B.

  As described above, in the present embodiment, high-pressure air is consumed only when the weft Y is gripped, and no air is consumed when maintaining the tension of the weft Y. For example, the tip of the weft is at the holding position. Compared to a contrasting structure (for example, the weft tension applying device according to Patent Document 1 described above) in which high-pressure air is continuously injected from before reaching to just before striking, the air consumption can be greatly reduced. In addition, a uniform tension state is obtained over the entire length of the weft by the tension applying action on the yarn feeding side and the counter yarn feeding side, so that a high-quality woven fabric can be woven.

  Further, the fulcrum of the tension applying arm 64 when applying tension to the weft Y is the upper side, and the guide part 64C (see FIG. 1) on the upper side of the tension applying arm 64 deforms the contact part of the weft Y. Since the 16 weft insertion passages 20 are guided upward with respect to the height position of the 16 weft insertion passages 20, there is no possibility that the weft Y is detached from the tension applying arm 64 when tension is applied to the weft Y.

  Further, since the insertion path 38 (the weft introduction path 40, the weft gripping path 42, and the open path 43) of the weft gripping block 34 is surrounded by a wall surface, the inserted weft Y is basically removed from the path. The weft Y can be stably gripped without coming off.

  Further, in the weft tension applying device 30 according to the present embodiment, the weft Y is guided into the insertion passage 38 using the injection action of the sub nozzle 22, but the opening area of the inlet portion 38A is deformed in the insertion passage 38. Since the cross-sectional area of the sixteen weft insertion passages 20 is set to be about 20% larger, the tip of the weft Y can smoothly enter the insertion passage 38 from the weft insertion passage 20 of the deformed rod 16. Further, since the insertion passage 38 is formed so that the cross-sectional area of the passage gradually decreases from the inlet portion 38A side toward the portion that grips the front end portion of the weft Y, the front end portion of the weft Y during flight is It is possible to smoothly enter the weft holding passage 42. Further, since the cross-sectional area of the weft gripping passage 42 is about 30% of the cross-sectional area of the weft insertion passage 20, it is possible to suppress the operating stroke of the weft gripping pin 50. As a result, the loom 10 has a high speed. In addition to being able to handle weft insertion, it is also advantageous in terms of durability.

  Here, the cross-sectional area Sa (shaded portion) of the weft insertion passage (20) of the deformed rod (16) shown in FIG. 15 (A) and the weft gripping block (34) shown in FIG. 15 (B). A preferred range for the ratio (passage cross-sectional area ratio) to the cross-sectional area Sb (shaded area) of the weft gripping passage (42) will be described.

  FIG. 13 shows the cross-sectional area ratio between the weft insertion passage (20) of the deformed kite (16) and the weft gripping passage (42) of the weft gripping block (34) and the response time of the weft gripping pin 50 to this ratio. The relationship is shown in a graph. In this graph, the cross-sectional area Sa of the weft insertion passage (20) of the deformed rod (16) is a predetermined value (constant), and the cross-sectional area Sb of the weft gripping passage (42) of the weft gripping block (34) is The result when variable is shown.

  As shown in FIG. 13, the response time of the weft gripping pin (50) becomes longer as the passage cross-sectional area ratio increases. This is because the stroke of the weft gripping pin (50) becomes longer as the passage cross-sectional area ratio becomes larger. The 3-port solenoid valve (58) that supplies high-pressure air from one side of the weft gripping pin (50) has a slower response time than the 5-port solenoid valve that supplies from both sides of the weft gripping pin (50). In addition, the air consumption and the solenoid valve driving power can be suppressed, and the initial cost is low. In other words, which of the 3-port solenoid valve (58) and the 5-port solenoid valve is applied is determined according to necessity.

  FIG. 14 shows the ratio of the cross-sectional area of the weft insertion passage (20) of the deformed kite (16) and the weft gripping passage (42) of the weft gripping block (34) and the weft to the weft gripping passage (34). The relationship with the ease of entering (Y) is shown in a graph. In this graph as well, in the same way as in the graph of FIG. 13, the cross-sectional area Sa of the weft insertion passage (20) of the deformed rod (16) is set to a predetermined value (constant), and the weft grip of the weft grip block (34) The results when the passage cross-sectional area Sb of the passage (42) is variable are shown. As shown in FIG. 14, it can be seen that the weft (Y) is less likely to enter the weft gripping passage (42) as the passage cross-sectional area ratio is smaller in any thickness of the weft (Y).

  13 and 14, the passage cross-sectional area ratio in which the response time of the weft gripping pin (50) is short and the weft (Y) can easily enter the weft gripping passage (42) is in the range of 20% to 70%. I understand that. That is, the passage cross-sectional area Sb of the portion where the tip of the weft (Y) is gripped between the weft gripping pin (50) in the insertion passage (38) and the weft insertion passage (20) of the deformed rod (16) The relationship with the cross-sectional area Sa is preferably set to 0.2Sa ≦ Sb ≦ 0.7Sa.

  In addition, as shown in FIG. 4, the weft tension applying device 30 according to the present embodiment has a width dimension 50W of the distal end portion 50A of the weft gripping pin 50 as viewed in the insertion direction of the insertion path 38, which is the minimum width of the insertion path 38. Since the dimension is set to be larger than the dimension 38W, the weft Y in the insertion path 38 can be more reliably gripped regardless of the position in the width direction of the weft Y.

  Further, the weft grip pin 50 is formed with a small diameter portion 50B having a diameter smaller than the tip portion 50A continuously from the tip portion 50A, and the weft grip pin 50 passes the tip portion of the weft Y to the weft grip passage 42 ( Since it is set so that at least a part of the small-diameter portion 50B is disposed in the weft gripping passage 42 (insertion passage 38) when gripped between the inner surface of the insertion passage 38) and FIG. As shown in FIG. 4, in the gripping state of the weft Y, a gap B is formed between the small diameter portion 50B and the weft gripping passage 42 (insertion passage 38). For this reason, even if an air flow to be inserted by wetting of the sub-nozzle 22 (see FIG. 1) enters the insertion passage 38 while the weft Y is gripped, the air flow passes through the gap B. That is, the backflow caused by the airflow being blocked by the weft gripping pin 50 can be suppressed, and the weft Y gripping performance is further stabilized.

  Further, as shown in FIG. 1, the tension applying arm 64 is extended from the pre-weaving side in a direction toward the space between the deformed kite 16 and the weft holding mechanism 32, so that when the deformed kite 16 is swung, When the tip of the weft Y is inserted into the insertion path 38 of the weft gripping mechanism 32 (in other words, before the weft Y comes into contact with the guide portion 64C of the tension applying arm 64 and the tip of the weft Y is the weft Before being gripped by the gripping mechanism section 32, the jet (airflow) from the sub-nozzle 22 for weft insertion is not blocked (but does not collide) by the tension applying arm 64 separated to the pre-weaving side. It enters into the insertion path 38 of the gripping mechanism 32. For this reason, even if the tension applying arm 64 is arranged for applying tension to the weft Y, smooth weft insertion can be performed. In addition, since the tension | tensile_strength provision arm 64 is comprised with one thin plate, initial cost can also be restrained low.

  As described above, according to the weft tension applying device 30 according to the present embodiment, an appropriate tension can be applied to the weft Y while suppressing air consumption.

[Second Embodiment]
Next, a weft tension applying device according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a longitudinal sectional view of the main part of the weft tension applying device 70 according to the present embodiment, and FIG. 6 shows a tension applying arm 64 as a tension applying member in the weft tension applying device 70. 72 are shown in a perspective view. As shown in these drawings, the weft tension applying device 70 is provided with two tension applying arms 64 and 72, and the weft tension applying device 30 according to the first embodiment (see FIG. 1 and the like). Is different. Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In FIG. 6, the illustration of parts other than the characteristic part of the present embodiment is partially omitted.

  As shown in FIGS. 5 and 6, the tension applying arms 64 and 72 are arranged in parallel along the weft insertion direction of the weft Y at a certain interval. Similar to the tension applying arm 64, the tension applying arm 72 adjacent to the tension applying arm 64 is installed on the front side of the loom 10 with respect to the space between the deformed rod 16 and the weft gripping block 34. The tension applying arm 72 has a base end portion 72A fixed to the attachment base 28 with a screw 29 and fixed to the loom frame 26 via the attachment base 28. It extends in the direction toward the part 32. As a result, the tension applying arm 72 is in a state in which the tip of the weft Y is gripped by the weft gripping mechanism section 32 and between the deformed scissors 16 and the weft gripping mechanism section 32 when the deformed scissors 16 swing in the strike direction ( Between the downstream end in the weft insertion direction of the deformed kite 16 and the upstream end in the weft inserting direction of the weft gripping mechanism portion 32), a tension is applied to the weft Y by relative displacement with the deformed kite 16 in contact with the weft Y. ing.

  The tension applying arm 72 is attached in a state where a member having the same shape as the tension applying arm 64 is turned upside down. The distal end portion 72B is formed in an arc shape, and the lower side portion on the distal end portion 72B side is in the longitudinal direction. The guide portion 72C is gently inclined downwardly toward the base end portion 72A (with a gentle downward slope). The guide portion 72C contacts the weft Y when the deformation rod 16 swings in the strike direction, and guides the contact portion of the weft Y downward with respect to the height position of the weft insertion passage 20 of the deformation rod 16. It has become. In addition, the lower side portion of the guide portion 72C opposite to the distal end portion 72B side extends substantially horizontally in the present embodiment.

  In other words, each of the tension applying arms 64 and 72 is in contact with the weft Y when the deformation rod 16 swings in the beating direction and the contact portion of the weft Y with respect to the height position of the weft insertion passage 20 of the deformation rod 16. The guide direction is set upside down with respect to other adjacent tension applying members (72, 64).

  According to the configuration of the present embodiment, substantially the same operations and effects as those of the first embodiment described above can be obtained, and the deformation stroke of the weft Y can be easily lengthened (that is, the weft Y can be easily stretched). This is effective when a stretch yarn having elasticity is used for the weft Y. When it is necessary to further stretch the weft Y, three or more tension applying arms may be arranged in parallel.

[Third Embodiment]
Next, a weft tension applying device according to a third embodiment of the present invention will be described with reference to FIG. The principal part of the weft tension | tensile_strength provision apparatus 80 which concerns on this embodiment is shown by FIG. 7 by the longitudinal cross-sectional view of front view. As shown in this figure, the weft tension applying device 80 includes a 5-port solenoid valve 82 in place of the 3-port solenoid valve 58, so that the weft tension applying device 30 (FIG. 1, etc.) according to the first embodiment is provided. Different from reference). Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, the opening area of the inlet portion 38A of the insertion passage 38 (weft introduction passage 40) shown in FIG. 7 is set to be 50% larger than the passage cross-sectional area of the weft insertion passage 20 of the deformed rod 16. Further, the cross-sectional area of the weft gripping passage 42 is set to about 50% of the cross-sectional area of the weft introduction passage 40.

  One end of an air tube 56 is connected to the upper end of the weft grip block 34 to supply air to the upper chamber of the internal space of the cylinder 46 or to discharge air from the upper space of the internal space of the cylinder 46. The other end of the tube 56 is connected to either the air supply port 82A or the exhaust port 82C of the 5-port solenoid valve 82. In addition, one end of a tubular air tube 56A is connected to the side of the weft grip block 34 to supply air to the lower chamber of the inner space of the cylinder 46 or to discharge air from the lower chamber of the inner space of the cylinder 46. The other end of the air tube 56A is connected to either the exhaust port 82B or the air supply port 82D of the 5-port solenoid valve 82.

  The cylinder 46 can be connected to the air supply source 60 via the air tube 56 and the air supply port 82A of the 5-port solenoid valve 82, and the air supply port 82D of the air tube 56A and the 5-port solenoid valve 82 is connected to the cylinder 46. Via the air supply source 60. The 5-port solenoid valve 82 is connected to the control unit 62. The control unit 62 performs control so as to switch the port of the 5-port solenoid valve 82 connected to the other end of the air tubes 56, 56A at a preset setting timing, and controls the 5-port solenoid valve 82. The direction of lifting and lowering of the weft gripping pin 84 as a pressing member can be controlled. The timing for switching the port of the 5-port solenoid valve 82 is the same as in the first embodiment.

  The weft grip pin 84 has the same configuration as the weft grip pin 50 (see FIG. 4) in the first embodiment except that the small diameter portion 50B (see FIG. 4) is not formed. That is, the weft gripping pin 84 is configured such that a short cylindrical piston portion 84P is coaxially and integrally provided at one end portion in the axial direction of a pin body 84H having a small diameter and a substantially round bar shape. In the figure, in the weft gripping pin 84, the same components as those of the weft gripping pin 50 (see FIG. 4) in the first embodiment are denoted by the same reference numerals. In the present embodiment, the compression coil spring 54 (see FIG. 3) in the first embodiment is not disposed inside the cylinder 46.

  According to the configuration of the present embodiment, substantially the same operations and effects as those of the first embodiment described above can be obtained, and high operating performance can be ensured even when a very thick yarn is used for the weft Y. Supplementally, since the passage cross-sectional areas of the inlet portion 38A and the weft gripping passage 42 of the insertion passage 38 (weft introduction passage 40) are set large, even if a very thick yarn is used for the weft Y, the weft gripping passage of the weft Y The 5-port solenoid valve 82 is used for driving the weft gripping pin 84 although the operation stroke of the weft gripping pin 84 is increased by the amount that the cross-sectional area of the weft gripping passage 42 is large. As a result, the operation of the weft gripping pin 84 becomes faster, so that the response performance when gripping the weft Y is also ensured.

[Fourth Embodiment]
Next, a weft tension applying device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a plan view showing a main part of the weft tension applying device 90 according to this embodiment. As shown in this figure, the weft tension applying device 90 is provided with an weft tension applying device according to the first embodiment in that an air passage portion 92 for ejecting air toward the weft detection sensor 24 is formed. It is different from the device 30 (see FIG. 1 etc.). Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, a jet nozzle 94A of a clean nozzle 94 is provided adjacent to the downstream side in the weft insertion direction of the weft Y in the weft insertion passage 20 of the deformation kite 16, and the jet port 94A is provided on the deformation kite 16A. Is arranged opposite to the detection surface 24A of the weft detection sensor 24. The clean nozzle 94 is attached to the back side of the deformed rod 16, and one end of an air tube 96 is connected to the base end side. The other end of the air tube 96 is connected to the exhaust port 58B of the three-port solenoid valve 58. That is, the clean nozzle 94 and the air tube 96 constitute an air passage portion 92 for ejecting the exhaust air supplied to the air cylinder mechanism 44 and used from the ejection port 94A.

  According to the configuration of the present embodiment, the high-pressure air discharged from the clean nozzle 94 is jetted onto the detection surface 24 </ b> A of the weft detection sensor 24 through the gap between the wings 18. By mounting the clean nozzle 94 in this way, the high-pressure air used to drive the weft gripping pin 50 is not discharged into the atmosphere wastefully, and the detection surface 24A of the weft detection sensor 24, which is easily attached to the fluff, is removed every weft insertion. Can be cleaned. As described above, according to the present embodiment, operations and effects similar to those of the first embodiment described above can be obtained, and stable weft detection can be performed.

[Fifth Embodiment]
Next, a weft tension applying device according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 shows a side view action diagram for explaining the action of the weft tension applying device 100 according to the present embodiment. In addition, in the drawing, the illustration of the components on the front side in the drawing relative to the tension applying arm 102 as the tension applying member is omitted, and the deformation state of the deformed scissors 16 and a part of the weft is shown by a two-dot chain line. .

  As shown in this figure, in this embodiment, the weft tension applying device 30 according to the first embodiment (see FIG. 1 and the like) is that an arcuate portion 102A is formed on the upper side of the tension applying arm 102. ) Is different. Other configurations are substantially the same as those of the first embodiment. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The tension applying arm 102 shown in FIG. 9 extends in a direction from the pre-weaving side to the space between the deformed kite 16 and the weft gripping mechanism portion 32 (see FIG. 1), and an arcuate portion 102A is formed on the upper side portion. Except for the points described above, the configuration is the same as that of the tension applying arm 64 (see FIG. 1) in the first embodiment. The arcuate portion 102A of the tension applying arm 102 is provided on the front side of the guide portion 64C, and is provided along the swinging direction of the deformed rod 16 (so as to coincide with the swinging motion trajectory). It is formed in an arc shape.

  Here, when the weft Y is supported in contact with the arcuate portion 102A when tension is applied to the weft Y, the stretch amount of the weft Y is the position between the arcuate portion 102A and the upper wall position of the guide hole 18A. Although it depends on the distance L1, the arc-shaped portion 102A is formed in an arc shape along the swinging direction of the deformed rod 16 (refer to the direction of arrow A), so the position of the arc-shaped portion 102A and the top of the guide hole 18A The distance L1 from the wall position is constant and the amount of weft Y stretched is constant.

  According to the configuration of the present embodiment, substantially the same operation and effect as the first embodiment described above can be obtained, and in the state where the weft Y is supported in contact with the arcuate portion 102A, the sley 12 swings. Even if the deformed wrinkle 16 changes its position (in FIG. 9, any position of reference numerals 16A, 16B, and 16C), the amount of weft Y stretched can be kept constant, so that more stable fabric quality can be obtained. .

[Sixth Embodiment]
Next, a weft tension applying device according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10 shows a side view action diagram for explaining the action of the weft tension applying device 110 according to the present embodiment. In the drawing, the illustration of the components on the nearer side of the drawing than the tension applying arm 112 as the tension applying member is omitted, and the deformation state of the deformed scissors 16 and a part of the weft Y is shown by a two-dot chain line. Yes.

  As shown in this figure, in the present embodiment, the tension applying arm 112 is the tension applying arm 72 in the second embodiment (see FIG. 6) except that an arc-shaped portion 112A is formed on the lower side. ), And is extended in a direction from the pre-weaving side toward the space between the deformed kite 16 and the weft gripping mechanism 32 (see FIG. 1). Therefore, the same components as those of the tension applying arm 72 (see FIG. 6) are denoted by the same reference numerals and description thereof is omitted. The other configuration of the weft tension applying device 110 is substantially the same as that of the first embodiment. In addition, about the component substantially the same as 1st, 2nd embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The arc-shaped portion 112A of the tension applying arm 112 shown in FIG. 10 is provided on the pre-weaving side continuously to the guide portion 72C, and is along the swing direction of the deformed rod 16 (coincides with the locus of the swing motion). It is formed in an arc shape.

  Here, in the state in which the weft Y is supported in contact with the arcuate portion 112A when tension is applied to the weft Y, the amount of stretch of the weft Y is the position of the arcuate portion 112A and the position of the lower wall of the guide hole 18A. Although it is determined according to the distance L2, the arc-shaped portion 112A is formed in an arc shape along the swinging direction of the deformed rod 16 (see the arrow A direction), so that the position of the arc-shaped portion 112A and the bottom of the guide hole 18A The distance L2 from the wall position is constant, and the amount of weft Y stretched is constant.

  According to the configuration of the present embodiment, substantially the same operations and effects as those of the first embodiment described above can be obtained, and the same operations and effects as those of the fifth embodiment described above can be obtained.

[Seventh Embodiment]
Next, a weft tension applying device according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 11 shows a main part of the weft tension applying device 120 according to the present embodiment in a longitudinal sectional view in a side view. As shown in this figure, the weft tension applying device 120 is provided with an insertion passage 126 instead of the insertion passage 38, and the air cylinder mechanism 44 is disposed with the axial direction of the weft gripping pin 50 being in the horizontal direction. This is different from the weft tension applying device 30 (see FIG. 1 and the like) according to the first embodiment. Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In FIG. 11, the illustration of parts other than the characteristic part of the present embodiment is partially omitted.

  As shown in FIG. 11, an insertion passage 126 is formed through the weft grip block 122, and the insertion passage 126 is formed so as to be surrounded by a wall surface. In the weft introduction passage 128 constituting a part of the insertion passage 126, the inlet section 126A is circular and the passage cross-sectional area gradually decreases from the inlet section 126A side toward the portion that grips the tip of the weft Y. It is formed in a constricted tapered shape so as to be (squeezed). Further, the weft gripping passage 130 constituting a part of the insertion passage 126 is formed continuously with the weft introduction passage 128, and the inner peripheral surface thereof has a cylindrical inner surface. The insertion passage 126 is otherwise configured in the same manner as the insertion passage 38 (see FIG. 3, etc.) (that is, the weft introduction passage 128 has the same configuration as the weft introduction passage 40 (see FIG. 3, etc.)). Is the same configuration as the weft grip passage 42 (see FIG. 3 and the like).

  The air cylinder mechanism 44 is inserted from the back side of the weft gripping block 122, and when the weft gripping pin 50 grips the weft Y between the inner surface of the weft gripping passage 130, the weft gripping pin 50 is It is configured to operate from the anti-weaving front side (right side in the figure) to the weaving front side (left side in the figure).

  The weft holding block 122 has the same configuration as the weft holding block 34 (see FIG. 1) in the first embodiment except for the above points, and is fixed on the sley 12.

  Also by the configuration of the present embodiment described above, the same operations and effects as those of the first embodiment described above can be obtained. Further, by making the shapes of the weft introduction passage 128 and the weft grasping passage 130 as described above, the manufacturing cost of the weft grasping block 122 can be greatly reduced.

[Eighth Embodiment]
Next, a weft tension applying device according to an eighth embodiment of the present invention will be described with reference to FIG. The principal part of the weft tension applying apparatus 140 which concerns on this embodiment is shown by the side view by FIG. As shown in this figure, the weft tension applying device 140 is different from the weft tension applying device 30 (see FIG. 1 etc.) according to the first embodiment in that the tension applying arm 64 can be moved by the moving mechanism 142. Is different. Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In FIG. 12, the illustration of parts other than the characteristic part of the present embodiment is partially omitted.

  As shown in FIG. 12, the moving mechanism 142 includes a vertical column portion 144, and a rack 146 extending in the vertical direction of the loom 10 is fixed to the vertical column portion 144, and on both sides of the rack 146. A guide rail 148 extending in parallel with the rack 146 is formed. Stoppers 149 are provided at the upper and lower ends of the guide rail 148. On the other hand, a pinion 150 that meshes with the rack 146 is rotatably supported on the mounting base 28, and a slider 152 that is slidable (slidable) along the longitudinal direction of the guide rail 148 is fixed. . The pinion 150 can be driven by a motor (not shown), and the mounting base 28 is raised when the motor is rotated forward, and the mounting base 28 is lowered when the motor is reversed.

  Further, a horizontal column portion 154 that is fixed to the loom frame 26 and extends in the front-rear direction of the loom 10 is provided on the lower end side of the vertical column portion 144. A rack 156 is fixed along the longitudinal direction of the horizontal column portion 154, and guide rails 158 extending in parallel with the rack 156 are formed above and below the rack 156. Stoppers 159 are provided at the left and right ends of the guide rail 158. On the other hand, a pinion 160 that meshes with the rack 156 is rotatably supported on the lower end portion side of the vertical column portion 144, and a slider 162 that is slidable (slidable) along the longitudinal direction of the guide rail 158. Is fixed. The pinion 160 can be driven by a motor (not shown). When the motor rotates forward, the vertical column portion 144 moves to the anti-weaving front side (right side in the drawing) of the loom 10, and when the motor reverses, The column part 144 moves to the weaving front side (left side in the figure) of the loom 10.

  That is, the moving mechanism 142 is configured to move the tension applying arm 64 in the vertical direction and in the horizontal direction perpendicular to the weft insertion direction of the weft Y by motor driving. As in the first embodiment, the tension applying arm 64 extends in a direction from the pre-weaving side to the space between the deformed kite 16 and the weft gripping mechanism portion 32 (see FIG. 1). It is constant.

  With the configuration of the present embodiment described above, the same operations and effects as those of the first embodiment described above can be obtained, and the position of the tension applying arm 64 can be easily set according to the type of weft Y and the weft insertion conditions. can do.

[Ninth Embodiment]
Next, a weft tension applying device according to a ninth embodiment of the present invention will be described with reference to FIGS. FIG. 16 is a perspective view of the weft tension applying device 170 according to the present embodiment at the end of weft insertion. FIG. 17 is a perspective view of the weft tension applying device 170 in the state of applying tension to the weft Y. It is shown in 18 shows a main portion of the weft tension applying device 170 in a longitudinal sectional view in a front view, and FIG. 19 shows a side view of the state in which the weft tension applying device 170 is cut at the position of the weft grip passage 178. FIG. 20 is a side sectional view showing a state in which the weft tension applying device 170 is cut near the position where the tension applying arm 64 is disposed.

  Configurations other than those described below are substantially the same as those in the first embodiment. Moreover, about the component substantially the same as 1st-8th embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIGS. 16 to 19, the lower portion of the weft gripping block 172 is fixed to the front side of the sley 12 in the weft tension applying device 170. As shown in FIG. 16, the weft gripping block 172 is disposed on the front side of the deformed kite 16, and the mounting position in the left-right direction can be changed according to the set weaving width. An insertion portion 172A that fits into the guide hole 18A of the deformed rod 16 is provided at the upper end of the weft grip block 172. The upstream portion of the insertion portion 172A in the weft insertion direction has an outer shape in a side sectional view that is the same as the shape in a side view of the guide hole 18A. That is, no gap is formed between the portion on the upstream side in the weft insertion direction of the insertion portion 172A and the guide hole 18A to allow the jet flow from the sub nozzle 22 to pass downstream in the weft insertion direction.

  As shown in FIGS. 16 and 19, an insertion path 174 is formed at the upper end of the weft grip block 172 including the insertion portion 172A. As shown in FIG. 18, the insertion passage 174 is formed so as to be surrounded by a wall surface, and the tip of the weft Y is inserted through the insertion passage 174. The weft introduction passage 176 constituting the upstream side of the insertion passage 174 in the weft insertion direction is formed in a substantially elliptical shape with its inlet portion 174A being long in the substantially front-rear direction of the loom 10 (direction substantially perpendicular to the paper surface of FIG. 18). (See FIG. 19). In addition, the weft introduction passage 176 gradually contracts from the inlet portion 174A side to the portion side (right side in the drawing) that grips the front end portion of the weft Y from the upper surface side and the back surface side (the back side of the paper surface in FIG. 18). It is formed in a shape that is squeezed (squeezed) (see FIG. 19). In addition, the weft gripping passage 178 constituting the downstream side in the weft insertion direction of the insertion passage 174 is formed continuously with the weft introduction passage 176 and the inner peripheral surface thereof has a cylindrical inner surface (see FIG. 19).

  As shown in FIG. 16, a plurality of punch holes 180 are formed in the weft introduction passage 176 and the weft gripping passage 178. The punching hole 180 passes through the weft introduction passage 176 and the weft gripping passage 178 to the weaving front side of the weft gripping block 172, and is an exhaust passage for guiding the jet flow by the sub nozzle 22 from the insertion passage 174 to the outside of the weft gripping block 172. Is forming. That is, the hole 180 has a function of suppressing the air resistance of the airflow in the insertion passage 174. As a modification, the punch hole 180 is penetrated from the weft introduction passage 176 and the weft grip passage 178 in other directions such as the upper side, the lower side, or the anti-weaving front side (back side) of the weft grip block 172. It may be. The total cross-sectional area in the direction perpendicular to the penetration direction in the plurality of punch holes 180 is set to be equal to or greater than the cross-sectional area in the direction perpendicular to the extending direction in the weft holding passage 178.

  The insertion passage 174 is otherwise configured in the same manner as the insertion passage 38 (see FIG. 3 and the like) in the first embodiment (that is, the weft introduction passage 176 has the same configuration as the weft introduction passage 40 (see FIG. 3 and the like)). The weft grip passage 178 has the same structure as the weft grip passage 42 (see FIG. 3 and the like).

  Further, as shown in FIG. 19, the weft gripping block 172 is provided with an air cylinder mechanism 182. The air cylinder mechanism 182 is arranged such that the weft grip pin 84 (see FIG. 7) according to the third embodiment is disposed instead of the weft grip pin 50 (see FIG. 3) of the first embodiment. Except for this, the configuration is substantially the same as the air cylinder mechanism 44 (see FIG. 3) of the first embodiment. When the weft gripping pin 84 grips the weft Y between the inner surface of the weft gripping passage 178, the air cylinder mechanism 182 operates the weft gripping pin 84 obliquely upward toward the anti-weaving front side (right side in the drawing). It has a configuration.

  As indicated by an imaginary line in FIG. 16, it is preferable that the weft insertion sub-nozzle 22 is disposed adjacent to the weft gripping block 172 on the upstream side in the weft insertion direction. In such a configuration, the insertion time of the weft Y into the insertion path 174 can be shortened compared to a configuration in which the sub nozzle 22 is not adjacent to the weft gripping block 172.

  On the other hand, as shown in FIG. 20, a pin holder 184 is fixed on the wedge member 14 fixed to the sley 12 at a position corresponding to the tension applying arm 64. The mounting position of the pin holder 184 in the left-right direction of the loom 10 (direction perpendicular to the paper surface of FIG. 20) is changed together with the tension applying arm 64 according to the set weaving width. The pin holder 184 is L-shaped in a side view, and includes a lower wall portion 184A that is fixed to the wedge member 14 and a vertical wall portion 184B that is disposed on the back side of the deformed rod 16. A plate-shaped rubber member 190 is attached to the vertical wall portion 184B between the back surface of the deformed rod 16, and an opening 186 into which the portion on the tip end 64B side of the tension applying arm 64 can be inserted is formed. Yes.

  FIG. 21 shows the pin holder 184 in a front view. As shown in FIG. 21, the opening 186 is formed at the center of the vertical wall 184B. Moreover, the split pin 188 is being fixed to the vertical wall part 184B above and below the opening part 186. The split pin 188 protrudes to the pre-weaving side with the direction perpendicular to the vertical wall portion 184B as the axial direction (see FIG. 20). As shown in FIG. 18, the split pin 188 is arranged at the upper and lower positions with the guide hole 18A of the deformed scissors 16 in between, and enters between the adjacent scissors 18 to bend the warps 18 laterally ( Elastically deformed). Thus, the split pin 188 forms a space in which a portion on the tip end portion 64B (see FIG. 20) side of the tension applying arm 64 can be inserted between the wings 18.

  Also by the configuration of the present embodiment described above, the same operations and effects as those of the first embodiment described above can be obtained. Further, in this embodiment, the weft thread Y block corresponding to various weaving width settings can be obtained by changing the mounting positions of the weft grip block 172, the tension applying arm 64, and the pin holder 184 (see FIG. 20) in the left-right direction. Tension can be applied.

[Supplementary explanation of the embodiment]
In the above embodiment, as shown in FIGS. 3 and 7, etc., the weft grip pins 50, 84 are short cylindrical piston portions at one end in the axial direction of the pin bodies 50H, 84H having a small diameter and a substantially round bar shape. 50P and 84P are coaxially and integrally provided. For example, a piston disposed in the internal space of the cylinder of the cylinder mechanism is disposed, and the pressing member is fixed to the shaft core portion of the piston. It may be another pressing member such as a substantially round bar-like or a substantially square bar-like member.

  Moreover, in the said embodiment, as FIG.3 and FIG.11 etc. show, insertion path 38, 126, 174 is toward the site | part side which grips the front-end | tip part of the weft Y from the entrance part 38A, 126A, 174A side. The cross-sectional area of the passage is formed so as to be gradually reduced, and such a configuration is preferable from the viewpoint of responsiveness of the weft gripping pins 50 and 84, but the tip of the weft is gripped from the inlet side of the insertion passage. It is also possible to adopt a configuration in which the cross-sectional area of the passage toward the portion to be fixed is constant.

  Further, in the first embodiment and the like, the weft gripping pin 50 is formed with a small diameter portion 50B having a diameter smaller than that of the tip portion 50A continuously from the tip portion 50A, so that a reverse flow of the airflow to be inserted is inserted. Such a configuration is preferable from the viewpoint of suppressing the occurrence, but a configuration in which the small diameter portion is not formed on the pressing member is also possible.

  In the above embodiment, the tension applying arms 64, 72, 102, and 112 are formed in a thin plate shape and the left and right directions of the loom 10 are disposed in the plate thickness direction. The loom 10 is arranged with the left-right direction as the plate thickness direction, and the upper side or the lower side in contact with the weft in the front view of the loom is formed so that the central portion in the plate thickness direction is raised. Good.

  In addition, the said embodiment and the above-mentioned some modification can be implemented combining suitably.

16 deformation rod 20 weft insertion passage 24 weft detection sensor 24A detection surface 26 loom frame 30 weft tension applying device 32 weft gripping mechanism section
34 Weft Holding Block 38 Insertion Path 38A Inlet Portion 38W Minimum Width of Insertion Path 44 Air Cylinder Mechanism 50 Weft Holding Pin (Pressing Member)
50A The tip of the weft gripping pin (the tip of the pressing member)
50B Small diameter part 50W Width dimension of the tip of the weft grip pin (Width dimension of the tip of the pressing member)
64 Tensioning arm (tensioning member)
64C guide section 70, 80, 90, 100, 110, 120, 140, 170 Weft tension applying device 72 Tension applying arm (tension applying member)
72C Guide section 84 Weft thread gripping pin (pressing member)
92 Air passage portion 94A Spout 102 102 Tension applying arm (tension applying member)
102A Arc-shaped part 112 Tension applying arm (tension applying member)
112A Arc-shaped part
122 Weft Holding Block 126 Insertion Path 126A Inlet Portion 142 Moving Mechanism
172 Weft grip block 174 Insertion path 174A Inlet portion Y Weft

Claims (8)

  1. The insertion path is arranged on the downstream side of the weft insertion path of the deformed kite in the weft insertion direction and is fixed on the sley, and the insertion path through which the front end of the weft thread inserted by being surrounded by a wall surface is inserted A weft gripping block penetrating in the weft insertion direction, a pressing member capable of gripping the tip of the weft between the inner surface of the insertion path, and operating the pressing member to move the tip of the weft An air cylinder mechanism to be gripped, and a weft thread gripping mechanism portion,
    The weft thread is fixed to a loom frame, and the weft thread is between the deformed scissors and the weft gripping mechanism section when the weft gripping mechanism section grips the tip of the weft thread and swings in the striking direction of the deformed scissors. A tension applying member that applies tension to the weft by relative displacement with the deformed heel,
    I have a,
    The tension applying member is
    It extends in a direction from the front side of the weave to the space between the deformed kite and the weft gripping mechanism portion, and contacts the weft when the deformed kite swings in the striking direction. A guide portion that guides in a vertical direction with respect to the height position of the weft insertion passage;
    An arc-shaped portion that is provided continuously on the front side of the guide portion and is formed in an arc shape so as to coincide with the locus of the swing motion of the deformed rod along the swing direction of the deformed rod;
    A weft tension applying device.
  2. The insertion path is arranged on the downstream side of the weft insertion path of the deformed kite in the weft insertion direction and is fixed on the sley, and the insertion path through which the front end of the weft thread inserted by being surrounded by a wall surface is inserted A weft gripping block penetrating in the weft insertion direction, a pressing member capable of gripping the tip of the weft between the inner surface of the insertion path, and operating the pressing member to move the tip of the weft An air cylinder mechanism to be gripped, and a weft thread gripping mechanism portion,
    The weft thread is fixed to a loom frame, and the weft thread is between the deformed scissors and the weft gripping mechanism section when the weft gripping mechanism section grips the tip of the weft thread and swings in the striking direction of the deformed scissors. A tension applying member that applies tension to the weft by relative displacement with the deformed heel,
    I have a,
    Both ends in the width direction of the first portion that grips the distal end portion of the weft with the pressing member at a part of the inner surface of the insertion passage are inserted into the first portion at a part of the inner surface of the insertion passage. The second portion is set on the outer side in the width direction than the second portion adjacent to both sides in the insertion direction of the passage, and the second portion constitutes a minimum width portion of the insertion passage, and the insertion direction of the insertion passage In view of the above, the weft tension applying device , wherein the width dimension of the tip portion of the pressing member is set larger than the width dimension of the second portion .
  3. In the insertion passage, the opening area of the entrance portion is set to be equal to or greater than the passage cross-sectional area of the weft insertion passage of the deformed scissors, and is directed from the entrance portion side to the portion side that grips the tip portion of the weft. The weft tension applying device according to claim 1 or 2 , wherein the passage cross-sectional area is gradually reduced.
  4. The pressing member is formed with a small-diameter portion having a diameter smaller than that of the tip portion continuously from the tip portion, and the pressing member grips the tip portion of the weft between the inner surface of the insertion passage. The weft tension applying device according to any one of claims 1 to 3 , wherein at least a part of the small diameter portion is set to be disposed in the insertion passage in a state.
  5. A plurality of the tension applying members are arranged in parallel along the weft insertion direction of the wefts, and each tension applying member contacts the wefts when the deforming rod swings in the striking direction, and the contact portion of the wefts is deformed. with guides in the vertical direction with respect to the height position of the weft insertion path of the reed, the other tensioning member adjacent to any one of claims 1 to 4 in which the guide direction is set upside down The weft tension applying device according to claim 1.
  6. An outlet is provided adjacent to the downstream side in the weft insertion direction of the weft thread in the weft insertion passage of the deformed rod, and the outlet is disposed opposite to a detection surface of a weft detection sensor for detecting the weft. The weft tension according to any one of claims 1 to 5 , wherein an air passage portion is formed for discharging the exhaust air supplied to the air cylinder mechanism and used from the jet outlet. Granting device.
  7. Vertically the tensioning member by the motor drive, and any one of claims 1 to 6, a moving mechanism for moving is provided to the loom frame perpendicular to the weft insertion direction and in the horizontal direction of the weft The weft tension applying device according to item 1.
  8. In the insertion passage, the relationship between the passage cross-sectional area Sb of the portion where the tip of the weft is held between the pressing member and the passage cross-sectional area Sa of the weft insertion passage of the deformed rod is 0.2Sa ≦ Sb ≦ The weft tension applying device according to any one of claims 1 to 7 , which is set to 0.7 Sa.
JP2012015959A 2011-02-01 2012-01-27 Weft tension applying device Active JP5689827B2 (en)

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JP2011019763 2011-02-01
JP2011019763 2011-02-01
JP2012015959A JP5689827B2 (en) 2011-02-01 2012-01-27 Weft tension applying device

Applications Claiming Priority (4)

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JP2012015959A JP5689827B2 (en) 2011-02-01 2012-01-27 Weft tension applying device
CN201280007180.5A CN103348045B (en) 2011-02-01 2012-02-01 Weft tensioning device
EP12741917.4A EP2671987B1 (en) 2011-02-01 2012-02-01 Weaving machine with a weft tensioning device
PCT/JP2012/052254 WO2012105603A1 (en) 2011-02-01 2012-02-01 Weft tensioning device

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JP2632549B2 (en) * 1988-06-27 1997-07-23 多川機械株式会社 Shuttleless loom of weft end processing equipment
JPH0616948Y2 (en) * 1988-10-14 1994-05-02 日産自動車株式会社 Water jet loom weft end holding device
JP3351072B2 (en) * 1993-12-16 2002-11-25 株式会社豊田自動織機 Fluid jet loom weft tension device
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JP2004218103A (en) * 2003-01-10 2004-08-05 Tsudakoma Corp Weft tension applying device for fluid jet type loom
CN2687148Y (en) * 2004-01-19 2005-03-23 任伟 Loom weft pretension device
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US7748414B2 (en) * 2006-12-12 2010-07-06 Itema (Switzerland) Ltd Method and apparatus for the insertion of weft threads
JP2011019763A (en) 2009-07-16 2011-02-03 Terumo Corp Medical device
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CN103348045A (en) 2013-10-09
WO2012105603A1 (en) 2012-08-09
JP2012177216A (en) 2012-09-13
EP2671987B1 (en) 2015-07-29
EP2671987A4 (en) 2014-08-06
EP2671987A1 (en) 2013-12-11

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