JP2007119999A - Weft insertion stabilizing device of water jet loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device suppressing upward air flow to weft insertion injecting water, caused by swinging motion of a reed. <P>SOLUTION: The weft insertion stabilizing device of water jet loom has, at its cap part, a air flow suppressing member 9 formed monolithically or non-monolithically with a cap part 7 at the upper side of a reed 4 and set at the cloth fell 10 side of the reed and out of the warp opening range 2, which air flow suppressing member has a part extending to the cloth fell side farther than the cap part. At least a part adjacent to the cap part of the extending part is positioned in the range of the cap part in the length direction of the dent. The extending part has a part of various variation form at the top of the cloth fell side. The extension part has the total length within the range of the cap part. And the reed side part of the total length is within a range of the cap part and the remaining cloth fell side part of the total length is out of the cap part. The extending part is formed on ≥2/5 of yarn feeding part side or its reverse side and of the total width in weft insertion direction of the cap part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus that maintains straightness of jet water for weft insertion of a water jet loom and stabilizes the weft insertion.

  In the water jet loom, a phenomenon occurs in which the weft insertion water moves upward as it goes to the side opposite to the yarn feeding side. This phenomenon is caused by the upward air flow generated in front of the heel by the oscillating movement of the heel (see, for example, Patent Document 1) in which a large number of wings are arranged in parallel between the upper and lower base parts. It is guessed. The principle that the upward air flow is generated is the theory that when the kite retreats after the beating, the air on the front side of the weave is attracted to the kite, and when the kite advances, the attracted air is pushed back and rises. The upward movement phenomenon of spray water is likely to occur during high speed and water saving, and the warp yarn may be damaged by the spray water that has moved upward. Therefore, in order to pass the spray water into the warp opening, the pressure of the spray water from the weft insertion nozzle must be increased to increase straightness or the spray direction must be adjusted in consideration of the upward movement amount. The adjustment was difficult.

JP-A-8-41758 (FIG. 1)

  The present invention has been developed in view of the above circumstances, and the problem to be solved is to suppress the upward air flow to the weft insertion water generated by the rocking motion of the kite.

  The invention of claim 1 is an airflow suppression member that is formed integrally with or separately from the upper base portion of the heel and disposed outside the warp opening range on the woven front side of the heel, and is located on the front side of the woven fabric from the base portion. The airflow suppression member having a portion extending toward the base, wherein the length of the extending portion is longer than half of the distance between the upper and lower warps at the position of the cocoon at the time of maximum opening of the warp, A weft insertion stabilizing device for a water jet loom characterized by being provided in a section.

  When the loom is operated at high speed, the warp may overrun and swell in a bow shape in the opening direction. However, the warp opening range here means a range where the warp is most opened without assuming overrun of the warp. In other words, the warp opening range refers to the two straight lines that connect the thread threading hole (mail) of the reed that is opened to the maximum in the vertical direction and the front of the weave and the area surrounded by the two straight lines. Since the member is provided outside the warp opening range, the member can be hardly damaged. Further, it is desirable that the airflow suppression member is provided outside the warp opening range and outside the warp overrun range from the viewpoint of preventing warp damage.

  The invention of claim 2 is characterized in that at least a portion of the extending portion adjacent to the base portion is located in a range of the base portion in the longitudinal direction of the wing.

  The invention of claim 3 is characterized in that the extending portion has a portion inclined downward toward the front of the weave.

  The invention according to claim 4 is characterized in that the extending portion has a bent portion bent at a right angle toward the warp side at a front portion on the front side of the weave.

  The invention according to claim 5 is characterized in that the extending portion has a curved portion that curves in an arc shape and opens to the wing side at the front portion on the front side of the weave.

  The invention according to claim 6 is characterized in that the extending portion has a total length within the range of the base portion.

  According to a seventh aspect of the present invention, the extending portion includes a heel side portion within the range of the base portion of the entire length thereof, and a remaining woven front side portion of the total length outside the range of the base portion. It is characterized by doing.

  The extending portion may be provided only at an arbitrary position in the entire width of the cap portion in the weft insertion direction. However, in order to further improve the effect of suppressing the upward airflow, as in the inventions of claims 8 and 9 It is desirable to specify the position to be provided.

  The invention according to claim 8 divides the entire width of the cap portion in the weft insertion direction into five equal parts, and provides the extending portions at two or more positions on the yarn feeding side or the counter yarn feeding side among the equally divided portions. It is characterized by that.

  In the invention of claim 9, the entire width in the weft insertion direction of the base part is equally divided into five parts, and the extending portions are provided at three or more positions on the yarn supply side or the counter yarn supply side among the equally divided parts. It is characterized by that.

  In the present invention, the portion of the airflow suppressing member extending toward the front side of the weave suppresses the rising airflow generated in front of the heel that swings during weft insertion, and accordingly, the rise of the weft insertion water can be suppressed. As a result, adjustment of the jet direction of the jet water is facilitated, and weft insertion is stabilized. Therefore, it is possible to prevent the warp from being damaged by the weft insertion water, and it is possible to reduce the amount of water to be injected and the injection pressure at the time of weft insertion.

  The invention of claim 4 suppresses the rising airflow at a place other than the front part on the front side of the airflow suppressing member, and suppresses the suppressed airflow from escaping to the front side by the bent part of the front part and leads it downward. , Can effectively reduce the updraft.

  According to the invention of claim 5, when the rising airflow is suppressed at a place other than the front part of the airflow suppressing member, the curved airflow smoothly escapes in the direction away from the ridge. By returning to, the updraft can be effectively reduced. Moreover, an injury can be prevented by a curved part.

  The invention of claim 8 can be read from the test results to be described later that the effect excellent in suppressing the rising airflow. In the invention of claim 9, a remarkable effect can be read from the test results described later in terms of suppressing the upward air flow.

  As shown in FIG. 1, the water-jet loom passes the jet water from the weft insertion nozzle 1 fixed to the loom frame through the warp opening range 2 to insert the weft, and is supported by the heel holding member 3. 4 is swung.

  The upper and lower ends of the elongated flat plate-shaped wings 5 are inserted into the winding spring 6 with a predetermined interval in parallel, and the upper and lower ends of the plurality of wings 5 integrated by the winding spring 6 A structure in which the part is accommodated in the base parts 7 and 8 having a U-shaped cross section facing each other in the vertical direction is common. The lower base 8 is fixed to the heel holding member 3, and the heel holding member 3 is connected to a swing mechanism (not shown).

  In the first example of the weft insertion stabilizing device, a member 9 (hereinafter referred to as “airflow suppressing member 9”) is extended at a lower end portion of the upper base portion 7 to the front side of the weave 10 and perpendicular to the longitudinal direction of the wing 5. Another member 9 (hereinafter referred to as “airflow suppressing member 9”) is also formed at the upper end of the heel holding member 3 and extends perpendicularly to the longitudinal direction of the wing 5 and downwards in the middle. Are further bent. The upper and lower airflow suppression members 9 are both provided outside the warp opening range 2. Further, the upper airflow suppression member 9 is integral with the upper base portion 7, and the lower airflow suppression member 9 is separate from the heel holding member 3 and is screwed.

  In each of the second to fourth examples of the weft insertion stabilizing device shown in FIGS. 2 (a), 2 (b), and 2 (c), the airflow suppression member 9 is integrally provided on the upper base portion 7. . In the second example, as shown in FIG. 2 (a), when the longitudinal direction of the wing 5 is assumed to be the vertical direction, the airflow suppression member 9 is inclined downward toward the front side of the weave toward the tip.

  In the third example, as shown in FIG. 2 (b), when the longitudinal direction of the wing 5 is assumed to be a vertical direction, the airflow suppression member 9 is inclined upward toward the tip and bent substantially horizontally in the middle. It is.

  In the fourth example, as shown in FIG. 2 (c), when the longitudinal direction of the wing 5 is assumed to be a vertical direction, the airflow suppression member 9 is horizontally extended toward the tip and the tip thereof is bent vertically. Is. In this way, it is possible to suppress the upward airflow at the base portion of the airflow suppression member, suppress the escape of the suppressed airflow to the front side of the weave at the front portion, and guide it downward.

  In each of the fifth and sixth examples of the weft insertion stabilizing device shown in FIGS. 3 (a) and 3 (b), a separate airflow suppression member 9 is screwed to the upper base part 7. In the fifth example shown in FIG. 3A, the airflow suppression member 9 is bent in an L-shaped cross section, and one piece thereof is used as a screwing portion. In the sixth example shown in FIG. 3B, the airflow suppression member 9 is bent in a cross-sectional shape.

  In each of the seventh to tenth examples of the weft insertion stabilizing device shown in FIGS. 4 (a) to (d), the airflow suppression member 9 is smooth with no corners in the extending direction toward the front side of the weave. It has a curved portion 11 that is continuous to the head and opens on the side of the wing 5. In the seventh example shown in FIG. 4 (a), the curved portion 11 opens downward from the flat portion of the airflow suppression member 9, and the eighth to tenth examples shown in FIGS. Is open in a state where the curved portion 11 faces the wing 5. In the eighth example, a part of the front part of the airflow suppression member 9 is the curved part 11, and the other part is the entire part of the front part of the airflow suppression member 9 that is the curved part 11.

  In the seventh example shown in FIG. 4 (a), the curved portion 11 has an arc shape less than a semicircle. If it does in this way, compared with the 4th example shown in Drawing 2 (c), air current can be smoothly led by curving part 11 below. Moreover, since it is circular arc shape, an injury can be prevented.

  In the eighth example, the curved portion 11 is semicircular.

  In the ninth example, the tip portion of the airflow suppression member 9 is composed of a base-side curved portion 11 and a tip-side reverse curved portion 12, the curved portion 11 is semicircular, and the reverse curved portion 12 is the wing 5. Less than a semicircle that opens in a direction away from

  In the tenth example, the entire airflow suppression member 9 is curved, and the curved portion 11 at the tip is an arc shape less than a semicircle.

  In each of the eighth example to the tenth example, the tip b is located at a location closer to the location a farthest from the root of the airflow suppression member 9. Since the curved portion 11 has the place farthest from the base of the airflow suppression member 9 (the place where the hand can be easily touched), injury can be prevented as compared with the seventh example. Further, in the eighth to tenth examples, when the upward air flow in the warp opening is suppressed by the root side of the air flow suppression member (side closer to the heel), the suppressed air flow escapes in the direction away from the heel. Ascending airflow can be suppressed more than in the seventh example by smoothly returning to the wing side by the curved portion.

  As shown in FIG. 5, the eleventh example of the weft insertion stabilizing device has an airflow suppression member 9 separate from the upper and lower base parts 7 and 8, and the airflow suppression member 9 is provided on the upper and lower base parts 7 and 8. The airflow suppression member 9 is similarly attached to the upper and lower base parts 7 and 8 even when the collar 4 is rotated 180 degrees up and down and left and right. It is possible to adjust the position in the weft insertion direction.

  The upper and lower base parts 7 and 8 are arranged so that the attachment pieces 15 and 16 are moved away from the wings 5 from the front end portions of the front piece 13 and the rear piece 14 of the portion that opens in a U-shaped cross section upward or downward. The mounting holes 15 and 16 are formed with screw holes H at regular intervals extending at right angles and along the entire width in the weft insertion direction.

  Further, the airflow suppression member 9 is formed narrower than the entire width of the cap portions 7 and 8 in the weft insertion direction, and a hole (not shown) is formed at a position corresponding to the screw hole H. In this way, as shown in FIG. 6, the hook 4 is provided with the mounting pieces 15, 16 in a vertically and horizontally symmetrical manner, and is fixed to the hook holding member 3 by being rotated 180 degrees vertically or horizontally. However, the airflow suppression member 9 can be attached to a desired location, which is convenient.

  The twelfth to fourteenth examples of the weft insertion stabilizing device are as shown in FIGS. 7 (a), (b), and (c). The airflow suppressing member 9 extending toward the front of the weave 10 is provided with respect to the outer side of 17, and the wing 5 and the airflow suppressing member 9 are integrated. Further, in all cases, the extending direction of the airflow suppression member 9 is perpendicular to the longitudinal direction of the wing 5.

  In the twelfth example, the airflow suppression member 9 is provided above the jet water tip range 17. In the thirteenth example, the airflow suppression member 9 is provided below the jet water tip range 17. In the fourteenth example, airflow suppression members 9 are provided both above and below the jet water tip range 17.

  A test was conducted to confirm the effect of the airflow suppression member 9. The test used a method in which spray water was applied for 5 seconds to a pressure-sensitive paper disposed on the side opposite to the yarn feeding side. The test conditions were: loom rotation speed: 1000 rpm, full length in the longitudinal direction of the reeds of the reed: 35 mm, full length in the weft insertion direction of the reed: 190 cm, jetting direction: 15 degrees obliquely downward with respect to the horizontal direction, no warp tension And Further, the test contents are those without the ridge 4 and the airflow suppression member 9 (type 1 that is simply injected from the weft insertion nozzle), only the ridge (type 2 without the airflow suppression member), and the airflow suppression member 9 There were 8 types (type 3 to type 10). From type 3 to type 7, the entire width in the weft insertion direction of the upper base part 7 is divided into five equal parts, and the part where the airflow suppression member 9 is attached is sequentially increased from the counterfeed side among the equally divided parts It is. Type 8 is obtained by dividing the entire width in the weft insertion direction of the upper base part 7 into five equal parts, and attaching the airflow suppression member 9 to two parts on the yarn supply side (weft insertion nozzle side) among the equally divided parts. is there. Type 9 is obtained by attaching an airflow suppression member 9 to the entire width of the lower base portion 8 in the weft insertion direction. Type 10 has an airflow suppression member 9 attached to the entire width in the weft insertion direction of the upper and lower cap parts 7 and 8.

  The test results are shown in FIG. 8 (a) to (d) for types 1 to 4, and FIG. 9 (b) to (d) for types 5 to 8, and FIG. ) Shows type 9 and type 10 sequentially. A hatched area 18 in the figure is a discolored portion (a portion that has been exposed to water) of the pressure sensitive paper. The hatched area 18 is a simplified representation of the actual color change state of the pressure sensitive paper. In the drawing, although the hatching area 18 protrudes greatly outside the warp opening range 2, as described above, the test is performed in a state in which the warp is not stretched. It diffuses within the range 2 and hardly diffuses outside the warp opening range 2.

  According to FIGS. 8 to 10, it can be read that the hatching region 18 is almost circular in type 3 to type 10 provided with the airflow suppression member 9 as compared with only the type 2 kite. Therefore, it can be said that the convergence property of the jet water is improved by providing the airflow suppression member 9. Further, in types 2 and 10 of the above test, the tip shape of the jet water was continuously photographed during a period in which the crank angle of the loom main shaft was 90 degrees to 215 degrees. As a result, it was also confirmed that the tip shape of the jet water converged in the type 10 (the direction in which the airflow suppression member 9 was provided) compared to the type 2 bottle only.

  The test results described above are summarized in the table of FIG. The numerical values in the table are calculated for each type with the amount of movement in the upward direction and the amount of movement in the post-weaving direction based on the center of the hatched area 18 in Type 1. From the table, it can be said that the movement amount in the upward direction is reduced by providing the airflow suppression member 9. Moreover, it can be said that the amount of movement in the upward direction and the amount of movement in the post-weaving direction decrease when the airflow suppression member 9 is provided over the entire width in the weft insertion direction. In the case of Type 9, the amount of movement in the post-weaving direction is increased because the airflow is directed upward from below by the airflow suppression member 9 on the front side of the reed 4 when the reed reed 4 is advanced. It is thought that the airflow from before weaving increased as a reaction.

  The weft insertion stabilizing device is not limited to the above example. For example, the airflow suppression member 9 of the form shown in the second to tenth examples may be provided not only in the upper base part 7 but also in the lower base part 8. Further, the extending portion of the member 9 may be outside the range where the warp overruns. In this case, since the range of the extending portion of the member 9 with respect to the vertical direction of the heel 4 is smaller than that outside the warp opening range, the air resistance to the member 9 is reduced accordingly.

It is a side view which shows the 1st example of a weft insertion stabilization apparatus. (A), (b) and (c) are side views showing second, third and fourth examples of the weft insertion stabilizing device. (A) and (b) are side views showing fifth and sixth examples of the weft insertion stabilizing device. (A), (b), (c) and (d) are side views showing seventh, eighth, ninth and tenth examples of the weft insertion stabilizing device. (A) and (B) are a side view and a plan view showing an eleventh example of the weft insertion stabilizing device. (A) and (B) are a side view and a front view showing a bag used in the eleventh example. (A), (B), and (C) are side views showing the 12th, 13th, and 14th examples of the weft insertion stabilizing device. (A), (b), (c), and (d) are side views showing test results of types 1, 2, 3, and 4. FIG. (A), (b), (c), and (d) are side views showing test results of types 5, 6, 7, and 8. FIG. (A) and (b) are side views showing test results of types 9 and 10. FIG. It is a table | surface of a test result.

Explanation of symbols

1 weft insertion nozzle, 2 warp opening range, 3 筬 holding member, 4 筬, 5 筬 feathers, 6 winding springs,
7 base part, 8 base part, 9 member (airflow suppression member), 10 weaves, 11 bending part, 12 reverse bending part,
13 front piece, 14 rear piece, 15 attachment piece, 16 attachment piece, 17 spray water tip range,
18 hatching area

Claims (9)

  An airflow suppression member (9) formed integrally or separately with the upper base (7) of the reed (4) and disposed outside the warp opening range (2) on the front (10) side of the reed (4) And having a portion extending toward the weaving front (10) side than the base portion (7), and the length of the extending portion of the wing (5) at the maximum opening of the warp A weft insertion stabilization device for a water-jet loom, characterized in that the airflow suppression member (9) longer than half of the distance between the upper and lower warps at the position is provided in the base (7).   The water jet according to claim 1, wherein at least a portion of the extending portion adjacent to the base portion (7) is located in a range of the base portion (7) in a longitudinal direction of the wing (5). Weft insertion stabilization device for type looms.   The weft insertion stabilizing device for a water-jet loom according to claim 1, wherein the extending portion has a portion inclined downward toward the front of the weave (10).   2. The weft insertion stability of a water-jet loom according to claim 1, wherein the extending portion has a bent portion bent at a right angle toward the warp side at a front portion on the front side of the weave (10). Device.   The extending portion has a curved portion (11) which is curved in an arc shape and opens on the side of the wing (5) at the front portion on the front side (10) thereof. Weft insertion stabilization device for water jet looms.   The weft insertion stabilization device for a water-jet loom according to claim 1, wherein the extending portion has a total length within the range of the base portion (7).   Of the total length of the extending portion, the heel side portion is within the range of the base part (7), and the remaining weaving (10) side part of the total length is the range of the base part (7). 2. The weft insertion stabilizing device for a water jet loom according to claim 1, wherein the weft insertion stabilizing device exists outside.   The entire width in the weft insertion direction of the base part (7) is divided into five equal parts, and the extending portions are provided at two or more places on the yarn supply side or the counter yarn supply side among the equally divided portions. The weft insertion stabilization device for a water jet loom according to claim 1.   The entire width in the weft insertion direction of the base part (7) is divided into five equal parts, and the extending part is provided at three or more positions on the yarn feeding side or the counter yarn feeding side among the equally divided parts. The weft insertion stabilizing device for a water jet loom according to claim 1.

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