JP2010133065A - Pile warp tension adjuster for pile loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To absorb the tension variation of a pile warp including an instantaneous tension rise occurring in fast picking for pile formation to enable stable pile tension to be maintained. <P>SOLUTION: A pile warp tension adjuster is provided, which has such a construction and mechanism a guide roller 18 functioning to guide a pile warp Tp unreeled from a pile warp beam is installed beneath the pile warp beam, a terry motion roller 20 is installed beneath the guide roller 18 at an interval wider than that in the vertical direction between the pile warp beam and the guide roller 18, a plate spring 25 extended in the longitudinal direction of the loom is fixedly installed on the side of the guide roller 18. As a result, the pile warp Tp turned around the guide roller 18 is guided on direct contact with the tip 41 of the plate spring 25, so that the plate spring 25 with small inertia is deflected following the tension variation of the pile warp Tp, thus ensuring the tension variation of the pile warp Tp to be absorbed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to tension adjustment of pile warp in a pile loom.

  In the pile loom, there are the following three main factors of fluctuations in the tension of the pile warp. First, there is a tension fluctuation accompanying the opening movement of the pile warp. Secondly, there is a tension fluctuation associated with the relative movement between the hammering position and the weaving position in the pile motion. Third, there is a tension fluctuation associated with the first pick, which is a beating after a loose pick, for pile formation. Among these, the first and second tension fluctuations change relatively slowly, but the third tension fluctuation changes instantaneously, and thus has a great influence on the pile warp.

  In order to absorb the tension fluctuation of the pile warp as described above, various tension adjusting devices have been conventionally proposed. For example, in Patent Document 1, a tension lever extending downward is fixed to a support shaft disposed at a lower portion of a pile warp beam, a bar extending in the weaving width direction is fixed to a lower end of the tension lever, and a thin metal plate cylinder is attached to the bar. The structure which provided the terry motion roll which consists of a shaped spring member is disclosed. The support shaft of the tension lever is connected to a servo motor or other drive mechanism through a gear, and absorbs the second tension fluctuation by giving a positive easing motion to the terry motion roll. The inertial force during the positive easing movement causes a delay or overshoot of the terry motion roll, causing a rapid fluctuation in the pile warp tension. However, Patent Literature 1 describes that the terry motion roll can be elastically deformed by itself to change the path length of the pile warp, thereby suppressing rapid fluctuations in the pile warp tension.

  FIG. 2 of Patent Document 2 shows a support body in which a support arm extending downward is fixed to an attachment shaft disposed below a pile warp beam, a terry motion roller is attached to the lower end of the support arm, and the support shaft is fixed to the attachment shaft. Discloses a configuration in which a leaf spring including a guide roller and a rigid guide bar is provided. The pile warp circulates around the guide roller, is guided by the guide bar, and reaches the terry motion roller. Further, the mounting shaft is actively rotated in synchronization with the relative movement between the hammering position and the weaving position in pile formation, and gives positive easing motion to the guide roller, guide bar and terry motion roller. Therefore, Patent Document 2 can absorb the second tension fluctuation. In Patent Document 2, when the loom is increased in speed, an impact is applied to the terry motion roller due to a rapid movement of the pre-weaving position when the second tension fluctuation is absorbed, but the deformation of the guide bar supported by the leaf spring is changed. Explains that the impact on the terry motion roller can be reduced.

  In FIG. 1 of Patent Document 3, a fixed guide roller and a terry motion roller to which positive easing motion is applied are disposed below the pile warp beam, and a rigid guide is provided between the guide roller and the terry motion roller. A configuration in which bars are disposed is disclosed. The guide bar is held at one end of a leaf spring fixed to a part of the loom frame, and is configured to be displaced when pile warp tension is applied. Although not described in the specification of Patent Document 3, the first to third tension fluctuations that occur in the pile warp are the positive easing motion of the terry motion roller and the negative easing caused by the elastic displacement of the guide bar (actually a leaf spring). It is thought to be absorbed by exercise.

JP 2004-11065 A JP 52-124970 A JP-A-10-60753

  The technique disclosed in Patent Document 1 requires a high-strength and relatively heavy leaf spring because a terry motion roll composed of a tubular leaf spring is accelerated and decelerated by a positive easing motion. For this reason, the inertia of the leaf spring is increased, and a large inertia force is applied to the leaf spring to cause abnormal deformation or abnormal movement such as overrun. As a result, the second tension fluctuation is not reliably absorbed, and the pile warp tension cannot be sufficiently stabilized. In particular, as in the third tension fluctuation described above, a large tension fluctuation of the pile warp that occurs instantaneously at the first pick for pile formation cannot be absorbed by an abnormal fluctuation of the leaf spring due to inertia, and the pile warp tension is reduced. There is a problem that it cannot be kept stable. Also, abnormal fluctuations in the leaf spring due to inertia tend to cause pile contraction, leading to a decrease in fabric quality. Furthermore, since the contact area of the pile warp with respect to the terry motion roll is small, the pile warp is easily brought into contact with and separated from the terry motion roll due to tension fluctuation, and the pile warp is likely to roll. Such rolling of the pile warp is a factor that cannot sufficiently absorb the first to third tension fluctuations.

  In Patent Document 2, a terry motion roller is formed of a rigid roller, and the function of the leaf spring in the terry motion roll of Patent Document 1 is separated from the terry motion roller, and the guide roller is attached to the tip of the leaf spring as a guide bar. It is the structure arrange | positioned independently in the vicinity. However, the terry motion roller, the guide bar, and the guide roller are configured to positively move. For this reason, a large inertia force is generated in the guide bar having a large mass, and similarly to the case of Patent Document 1, fluctuations in the tension of the pile warp cannot be sufficiently absorbed, and the quality of the fabric is deteriorated. In addition, since the contact area of the pile warp with the guide bar is small, there is a problem that the pile warp rolls as in Patent Document 1 and the function of absorbing tension fluctuation is further lowered.

  The guide bar in Patent Document 3 is configured so as to absorb the fluctuation in the tension of the pile warp by the negative easing motion, and the inertial force generated by applying the positive easing motion as in Patent Document 1 and Patent Document 2 is used. The problem has been resolved. However, the guide bar made of a rigid body has a large mass. For this reason, especially when a momentary tension is applied to the pile warp, as in the third tension fluctuation, the guide bar is largely displaced without following the tension change due to its own inertial force. There is a problem that the absorption function of water is reduced. In addition, since the contact area of the pile warp with the guide bar is small, the pile warp rolls in the same manner as in Patent Document 1 and Patent Document 2, and there is a problem that the function of absorbing the tension fluctuation is further lowered.

  An object of the present invention is to absorb a fluctuation in the tension of a pile warp including an instantaneous increase in tension that occurs during a first pick for forming a pile, and to maintain a stable pile warp tension.

  The present invention according to claim 1 includes a pile warp beam and a ground warp beam supported by a part of a frame of a loom, guides the pile warp drawn from the pile warp beam by a terry motion roller, In the pile weaving machine configured to guide to the pile, a leaf spring extending in the front-rear direction of the loom is disposed in a pile warp path between the pile warp beam and the terry motion roller, and the leaf spring has a base end portion. The pile warp is brought into contact with the surface on the tip end side of the leaf spring and guided to the terry motion roller.

  According to this invention of Claim 1, since mechanical strength is not required by fixing and providing a leaf | plate spring, the inertia of leaf | plate spring itself can be made as small as possible. Moreover, the contact area of the pile warp can be increased by guiding the pile warp in contact with the surface of the leaf spring. Accordingly, the combination of the configuration in which the inertia of the leaf spring is reduced and the configuration in which the contact area of the pile warp is increased can sufficiently absorb the fluctuation in the tension of the pile warp. In particular, the elastic followability of the leaf spring with respect to an instantaneous increase in tension during the first pick is improved. Further, the above-described tension fluctuation absorbing function can sufficiently follow even a high speed pile loom.

  According to a second aspect of the present invention, a rigid guide plate extending in the front-rear direction of the loom is spaced at least on the tip end side of the leaf spring in a direction in which the leaf spring is elastically deformed by the tension of the pile warp. The guide plate is formed so that the length of the guide plate in the longitudinal direction of the loom is shorter than that of the leaf spring and the guide plate is curved in the vertical direction of the loom. During border weaving or weaving, the length of the action portion of the leaf spring is shortened by the contact between the displaced base end side of the leaf spring and the guide plate, and the spring constant can be increased. Accordingly, the pile warp tension can be raised to the set tension at an early stage. In addition, the curved guide plate can avoid a point-intensive contact with the leaf spring, and can prevent the leaf spring from generating vibrations, noise, and damage during the contact.

  The invention of claim 3 is characterized in that the base end portion of the leaf spring is held by a fixing bar fixed to a part of the frame of the loom, and the tip portion of the leaf spring is formed on a curved surface. Therefore, the attachment and removal of the leaf spring can be performed easily, and the pile warp can be smoothly brought into contact with the curved surface of the leaf spring.

  The present invention according to claim 4 is characterized in that the fixing bar is provided on the pile warp beam side with respect to the curved surface of the leaf spring, and has a guide surface that contacts the pile warp. The section in the free state of the pile warp drawn from the pile warp beam can be shortened, and the wavy phenomenon of the pile warp can be prevented.

  In the present invention of claim 5, the pile warp beam is disposed above the ground warp beam, and a guide roller for guiding the pile warp drawn from the pile warp beam is disposed below the pile warp beam. The terry motion roller is disposed below the guide roller with a gap larger than the vertical gap between the pile warp beam and the guide roller, and the leaf spring is disposed on the guide roller side. Since the guide roller is arranged, the degree of freedom of the attachment position of the leaf spring is increased, and a large space is provided between the leaf spring and the terry motion roller. Workability at the time of replacement can be improved.

  The present invention according to claim 6 is characterized in that the leaf spring performs a negative easing motion on the pile warp, and the terry motion roller performs a positive easing motion on the pile warp. The motion roller reliably absorbs fluctuations in the pile warp tension during relative movement between the hammering position and the weaving position, and the leaf spring reliably absorbs tension fluctuation during the first pick and tension fluctuation during the pile warp opening movement. can do.

  The present invention according to claim 7 is characterized in that the guide plate is divided into a plurality of parts in the weaving width direction of the loom, and thus has a higher accuracy than that formed by a single plate. A guide plate can be easily manufactured. Moreover, the workability | operativity at the time of attachment and removal of a guide plate can be improved.

  The present invention can sufficiently absorb the fluctuation in the tension of the pile warp and maintain a stable pile warp tension.

(First embodiment)
The first embodiment shown in FIGS. 1 to 4 is configured as follows.
In FIG. 1, 1 is a ground warp beam. The ground warp beam 1 is rotationally driven by a feed motor Mg electrically connected to the feed control device C1. The ground warp T sent out from the ground warp beam 1 by the operation of the feed motor Mg is passed through the arcuate back guide plate 2 and the tension roller 3 to the reeds 4 and 5. The woven fabric W is wound around the cross roller 10 via the expansion bar 6, the surface roller 7 and the guide rollers 8 and 9.

  The loom frame 11 supports the back guide plate 2 by a bracket (not shown) fixed by bolts (not shown), and further supports the support shaft 12 in a rotatable manner. The upper arm 13 fixed to the support shaft 12 supports the tension roller 3 rotatably at its upper end. The tension roller 3 receives a biasing force from a biasing force applying mechanism (not shown) and absorbs the tension fluctuation of the ground warp T due to the warp opening motion by depolarization easing. Moreover, the lower arm 14 is fixed to the support shaft 12, and the rod 15 is rotatably connected to the tip thereof.

  A load cell 16 for detecting the tension of the ground warp yarn T applied to the tension roller 3 is attached to the rod 15, and the load cell 16 is electrically connected to the feed control device C <b> 1. The delivery control device C1 controls the delivery speed of the delivery motor Mg based on preset reference tension and tension detection information obtained from the load cell 16.

  A pile warp beam 17 is disposed above the ground warp beam 1. The pile warp beam 17 is rotationally driven by a feed motor Mp electrically connected to the feed control device C2. The pile warp Tp delivered from the pile warp beam 17 is passed through the guide 4, the tension adjusting device 19, and the terry motion roller 20 through the heel 4 and the heel 5.

  The guide roller 18 is fixed to the loom frame 11 below the pile warp beam 17. Further, the guide roller 18 has a pair of detected elements (not shown) at end positions where the pile warp Tp is not guided. A pair of proximity switches 21 (only one is displayed) are provided at positions facing the pair of detected elements of the guide roller 18. The proximity switch 21 detects the rotation of the guide roller 18 and sends a detection signal to the control device C2.

  The tension adjusting device 19 is disposed at a position close to the lower side of the guide roller 18, and will be described with reference to FIGS. As shown in the exploded views of FIGS. 3 and 4, the tension adjusting device 19 includes a support shaft 22, a spacer 23, a guide plate 24 divided into a plurality of parts, a leaf spring 25, a nut bar 26, and a fixed bar 27 as basic elements. ing.

  The support shaft 22 extends in the weaving width direction of the loom and is supported on the loom frame 11 by holders 28 (see FIG. 3) and bolts 29 at both ends. A plurality of holding rings 30 are fitted to the support shaft 22 and are fixed by appropriate means. Further, a hook-shaped holding bracket 31 is fixed to each holding ring 30 with a bolt (not shown) through a bolt hole 33 formed in the vertical portion 32 and a bolt hole 30a of the holding ring 30. it can.

  The holding bracket 31 has a horizontal portion 34 that is connected to the vertical portion 32 at a right angle, and a bolt hole 36 through which the bolt 35 passes is formed in the horizontal portion 34. The spacer 23 is formed of a single bar having a rectangular cross section that is long in the weaving width direction, and has a plurality of bolt holes 37 penetrating in the vertical direction. The plurality of bolt holes 37 correspond to the bolt holes 36 of the horizontal portion 34 of the holding bracket 31.

  The guide plate 24 is composed of a plurality of rigid plates arranged in the weaving width direction. As shown in FIG. 4, the rear side (left side of the drawing) tip 38 of the loom is curved downward (the guide plate 24 is A shape that curves convexly with respect to the leaf spring 25. Further, as shown in FIG. 3, the lobe front side base end portion 39 of the guide plate 24 is formed with three grooves 40 having a size through which the bolts 35 penetrate at positions corresponding to the bolt holes 36 and 37. .

  The leaf spring 25 is composed of one thin elastic material having substantially the same length as the spacer 23 extending in the weaving width direction by a length corresponding to the row width of the pile warp Tp guided from the guide roller 18, and its short direction. Is arranged to extend in the front-rear direction of the loom. The length of the leaf spring 25 in the front-rear direction of the loom is configured to be longer than that of the guide plate 24. As shown in FIG. 4, the rear end (left side in the figure) tip 41 of the loom of the leaf spring 25 is formed in a curved surface that is largely bent downward, and the guide plate 24 is provided at the base end portion 42 of the leaf spring 25. Similarly, a plurality of grooves 43 having a size through which the bolt 35 penetrates are formed at positions corresponding to the bolt holes 36 and 37.

  The nut bar 26 is formed by a bar having a square section substantially the same length as the leaf spring 25 extending in the weaving width direction, and has a plurality of screw holes 44 to which the bolts 35 are fastened at positions corresponding to the bolt holes 36 and 37. The fixing bar 27 is formed of a cylindrical bar having a plurality of cavities having different sizes in the height direction with respect to the bottom surface 45, and a relatively small cavity 46 is formed on the front side of the loom, compared with the rear side of the loom. A large cavity 47 is formed. The cavity 46 is formed in a space in which the nut bar 26 can be accommodated, and a dovetail groove 48 through which the bolt 35 passes is formed in the bottom surface 45 at a position corresponding to the screw hole 44 in the weaving width direction. On the upper surface of the cavity 47, a guide surface 49 that is curved toward the loom rear side is formed.

  The tension adjusting device 19 can be assembled by, for example, the following method. First, the spacer 23, the base end portion 39 of the guide plate 24, the base end portion 42 of the leaf spring 25, and the bottom surface 45 of the fixing bar 27 are superimposed on the horizontal portion 34 of the holding bracket 31, and the nut bar is placed in the cavity 46 of the fixing bar 27. 26 is inserted. Next, the bolt holes 36 and 37, the grooves 40 and 43, the dovetail groove 48 and the screw hole 44 are matched in phase, and the bolt 35 is inserted and fastened to the screw hole 44 of the nut bar 26. In this state, the tension adjusting device 19 can be unitized. Next, the tension adjusting device 19 can be attached to the support shaft 22 by overlapping the bolt hole 33 of the vertical portion 32 of the holding bracket 31 with the bolt hole 30a of the holding ring 30 and fixing with a bolt (not shown). The tension adjusting device 19 can absorb the tension fluctuation of the pile warp Tp due to the warp opening movement and the tension fluctuation accompanying the first pick for pile formation by the de-energizing movement using the bending of the leaf spring 25.

  As shown in FIG. 2, a lever 50 extending in the horizontal direction is fixed to a part of the support shaft 22, and a lever 52 including a load cell 51 and fixed to the loom frame 11 is connected to the lever 50. . The load cell 51 detects the tension of the pile warp Tp as a change in the load applied to the support shaft 22 via the leaf spring 25, and sends a detection signal to the control device C2. Accordingly, the delivery control device C2 compares the preset reference tension with the tension detection information obtained from the load cell 51 and determines the delivery speed of the delivery motor Mp based on the rotation detection signal obtained from the proximity switch 21 (see FIG. 1). Control.

  As shown in FIGS. 1 and 2, the tip of the upper arm 55 of the swing lever 54 rotatably supported by the shaft 53 has a U-shape having an arc surface slightly smaller than the diameter of the terry motion roller 20. A shaped holding portion 56 is formed. Since the terry motion roller 20 is held on the holding portion 56 by snap fitting, the terry motion roller 20 can be easily attached and detached. The terry motion roller 20 is disposed at a large distance downward from the position where the leaf spring 25 is disposed, thereby facilitating the yarn splicing operation and the machine change operation. The lower arm 57 of the swing lever 54 has a long hole 58 at the lower end, and is rotatably connected to the rod 15 by a bolt 59 passing through the long hole 58.

  On the other hand, as shown in FIG. 1, a bifurcated intermediate lever 60 is rotatably disposed on a shaft 61 at the center in the front-rear direction of the loom, and a pile motion mechanism 62 is disposed at an upper position thereof. . Although the internal structure of the pile motion mechanism 62 is not illustrated, a drive device including a ball screw mechanism or a cam mechanism driven by a dedicated drive motor or a loom drive motor Mo is provided, and the drive device is activated by the operation of this drive device. A drive lever 64 integral with the connected drive shaft 63 is reciprocally rotated.

  The operation of the loom drive motor Mo is controlled by a loom control device Cd connected to a rotary encoder 65 that detects the machine base rotation angle. The loom control device Cd and the feed control device C2 are connected to the pattern control device 66. In the pattern control device 66, a pattern pattern for pile weaving is set. The handle control device 66 sends a weave pattern to the loom control device Cd and the feed control device C2 at every predetermined machine base rotation angle in one weft insertion cycle. Therefore, the loom control device Cd operates the pile motion mechanism 62 based on the weaving pattern obtained from the patterning control device 66, and the sending control device C2 sends out based on the weaving pattern obtained from the patterning control device 66. The motor Mp is operated.

  The drive lever 64 transmits a reciprocating rotational motion to the intermediate lever 60 via a rod 68 connected to one arm 67 of the intermediate lever 60, and the intermediate lever 60 is connected to the other arm 69 via a rod 15. 3 and the terry motion roller 20 can transmit a swinging motion, that is, a terry motion. The expansion bar 6 that guides the woven fabric W at the front position of the loom is supported by the upper end of a swing lever 71 that is rotatably supported by a shaft 70, and the lower end of the swing lever 71 is an intermediate lever via a rod 72. 60 is connected to the other arm 69.

  Accordingly, the reciprocating rotation of the intermediate lever 60 simultaneously swings the swing lever 71 via the rod 72 and can transmit the terry motion in the same direction as the tension roller 3 and the terry motion roller 20 to the expansion bar 6. The terry motion based on the weave pattern is used to swing the tension roller 3, the terry motion roller 20 and the expansion bar 6 to the front of the loom on the right side of FIG. At the position of the imaginary line, the tension roller 3, the terry motion roller 20 and the expansion bar 6 are swung to the rear of the loom on the left side of FIG. Place in position.

The operation of the first embodiment configured as described above will be described below.
The pile warp Tp drawn out from the pile warp beam 17 passes through the guide roller 18 in a U-shape, contacts the guide surface 49 of the fixed bar 27, and further directly contacts the tip 41 of the leaf spring 25. For this reason, the leaf spring 25 is bent from the imaginary line position of FIG. 2 to the solid line position by the tension of the pile warp thread Tp, and the pile warp thread Tp can contact the leaf spring 25 over a wide range. A predetermined tension is applied to the pile warp Tp by the bending of the leaf spring 25. The pile warp Tp passing through the leaf spring 25 circulates around the terry motion roller 20, passes through the ridges 4 and 5 and reaches the pre-weaving W1.

  When the loom driving motor Mo is started in the state where the pile warp Tp is set and the pile weaving machine is operated, the pile weaving is performed based on the weaving pattern signal from the pattern control device 66 along with the opening movement of the pile warp Tp. The process and the border weaving process are repeated in a predetermined weft insertion cycle. In the pile weaving process, the operation of the pile motion mechanism 62 causes the tension roller 3, the terry motion roller 20 and the expansion bar 6 to swing to the phantom line position in FIG. 1, and the pre-weaving W1 is at the phantom line position. Is called. At the timing of the first pick following the loose pick, the tension roller 3, the terry motion roller 20, and the expansion bar 6 are swung to the solid line position in FIG. For this reason, the first pick is performed in a state where the woven cloth W1 is moved to the solid line position, and a pile is formed on the woven cloth W.

  At the time of switching between the first pick and the loose pick, the pile warp Tp moves in the front-rear direction of the loom in accordance with the displacement of the weaving front W 1, so that the tension fluctuation occurs. This tension fluctuation is linked to the pile motion mechanism 62. It is absorbed by the positive easing movement. In the first pick, since the weaving W1 is displaced from the imaginary line position to the solid line position in FIG. 1 to form a pile, and a strong hammering motion is performed, a large tension fluctuation occurs instantaneously in the pile warp Tp. However, when a large tension is momentarily applied to the pile warp Tp, the leaf spring 25 is greatly bent instantaneously, and the instantaneous tension fluctuation of the pile warp Tp can be absorbed.

  Since the leaf spring 25 is configured to perform a negative easing motion, it does not require strength as compared with a case where a positive easing motion is performed, and thus can be configured to be thin and light. Therefore, abnormal fluctuations due to the inertia of the leaf spring 25 itself can be suppressed. For this reason, the bending action of the leaf spring 25 reliably follows the instantaneous tension fluctuation during the first pick, and the stable tension of the pile warp Tp is maintained. Moreover, there is no occurrence of pile shrinkage and the like, and high fabric quality can be obtained. The instantaneous bending of the leaf spring 25 due to the tension fluctuation during the first pick gradually returns to the original position by the subsequent feeding of the pile warp Tp. In addition, the leaf | plate spring 25 can also perform the absorption effect | action of the moderate tension | tensile_strength fluctuation | variation of the pile warp Tp by opening movement.

  After the pile warp Tp circulates around the guide roller 18, the contact state is maintained over a wide range by the guide surface 49 of the fixing bar 27 and the leaf spring 25. For this reason, in this embodiment, the section of the free state of the pile warp Tp can be reduced as much as possible. Accordingly, the rolling of the pile warp Tp accompanying the three types of tension fluctuations described above is suppressed, and overlapping and entanglement of the adjacent pile warp Tp can be prevented, so that a more stable tension state of the pile warp Tp is maintained. The

  In the border weaving process, it is necessary to apply a greater tension to the pile warp Tp than in the pile weaving process. Moreover, since the transition time from the pile weaving process to the border weaving process is within a normal weaving cycle according to the rotational speed of the pile loom, it is very short. The leaf spring 25 is bent due to the tension of the pile warp Tp during the transition to the border weaving process, but gradually comes into contact with the curved surface of the guide plate 24 when it is bent by a certain amount. For this reason, the leaf spring 25 can be elastically deformed only in a short portion in the longitudinal direction of the loom that is not in contact with the guide plate 24, and the spring constant of the leaf spring 25 is increased smoothly and rapidly. As a result, the tension of the pile warp Tp can be increased to the required tension in a short time, and a pile woven fabric with a clear boundary between the pile weaving and the border weaving can be woven. Further, since the guide plate 24 is formed with a curved surface, the leaf spring 25 is in contact with the guide plate 24 over a wide area, and suppresses vibration as in the case of partial contact so that the pile warps Tp contact each other. Tangle can be prevented.

The above-described first embodiment of the present invention has the following effects.
(1) Abnormal fluctuation due to the inertia of the leaf spring 25 itself can be suppressed, and instantaneous tension fluctuation during the first pick can be reliably absorbed.
(2) The combination of the leaf spring 25 that performs the negative easing motion and the terry motion roller 20 that performs the positive easing motion can reliably absorb three types of tension fluctuations in the pile warp Tp, and the pile warp Tp is stable. Tension can be maintained.
(3) By providing the guide plate 24, the tension of the pile warp Tp can be increased in a short time when switching from the pile weaving process to the border weaving process.
(4) By increasing the vertical distance between the leaf spring 25 and the terry motion roller 20 in the loom, workability at the time of yarn splicing or machine change can be improved.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

(1) The tip 41 of the leaf spring 25 does not necessarily have to be formed on a curved surface.
(2) The guide plate 24 may be formed of a single plate made of a rigid body.
(3) The guide plate 24 is not necessarily provided.
(4) The guide surface 49 of the fixed bar 27 for guiding the pile warp Tp may be omitted.
(5) The guide roller 18 is not necessarily required if it is configured so that the tension fluctuation of the pile warp Tp accompanying the diameter change of the pile warp beam 17 can be absorbed by the leaf spring 25.
(6) The tension roller 3 may be configured to perform a negative easing motion.
(7) The relative movement between the pre-weaving W1 and the striking position is not limited to the configuration in which the pre-weaving W1 is displaced as in the first embodiment. Good.
(8) A spacer may be interposed on the base end side of the plate spring 25 and the guide plate 24, and a space may be provided between the plate spring 25 and the guide plate 24 on the base end side.

It is the schematic of the pile loom which implemented this invention. It is a side view which shows the tension adjustment apparatus of a pile warp. It is a disassembled perspective view which shows the attachment apparatus of a leaf | plate spring. It is the sectional view on the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground warp beam 3 Tension roller 6 Expansion bar 11 Loom frame 16 Load cell 17 Warp beam 18 Guide roller 19 Tension adjusting device 20 Terry motion roller 22 Support shaft 23 Spacer 24 Guide plate 25 Leaf spring 26 Nut bar 27 Fixing bar 30 Holding ring 31 Holding Bracket 41 Tip 49 Guide surface 51 Load cell 62 Pile motion mechanism Cd Loom control device Mg Ground warp beam feed motor Mp Pile warp beam feed motor T Ground warp Tp Pile warp W1 Before weaving

Claims (7)

A pile weaving loom comprising a pile warp beam and a ground warp beam supported by a part of a frame of the loom, wherein the pile warp drawn from the pile warp beam is guided by a terry motion roller and guided to the front side of the weaving. In
A leaf spring extending in the front-rear direction of the loom is disposed in a pile warp path between the pile warp beam and the terry motion roller, and the leaf spring fixes a base end portion, and a surface on the tip end side of the leaf spring. A pile warp tension adjusting device in a pile loom, wherein the pile warp is brought into contact with and guided to the terry motion roller.   A guide plate made of a rigid body extending in the front-rear direction of the loom is disposed at least on the front end side of the leaf spring in a direction in which the leaf spring is elastically deformed by the tension of the pile warp. 2. The pile warp tension adjusting device for a pile loom according to claim 1, wherein a length in a direction is shorter than that of the leaf spring and the guide plate is bent in the vertical direction of the loom.   The base end portion of the leaf spring is held by a fixing bar fixed to a part of the frame of the loom, and the distal end portion of the leaf spring is formed on a curved surface. The pile warp tension adjusting device in the pile loom described.   4. The pile warp tension in a pile loom according to claim 3, wherein the fixing bar is provided on the pile warp beam side with respect to the curved surface of the leaf spring and includes a guide surface that comes into contact with the pile warp. Adjustment device.   The pile warp beam is disposed above the ground warp beam, a guide roller for guiding the pile warp drawn from the pile warp beam is disposed below the pile warp beam, and the pile is disposed below the guide roller. The terry motion roller is disposed with a gap larger than a vertical gap between a warp beam and the guide roller, and the leaf spring is disposed on the guide roller side. The pile warp tension adjusting device in the pile loom according to any one of claims 1 to 4.   The said leaf | plate spring performs depolarizing easing movement with respect to the said pile warp, and the said terry motion roller performs positive easing movement with respect to the said pile warp. Pile warp tension adjusting device in a pile loom.   The pile warp tension adjusting device for a pile loom according to any one of claims 2 to 6, wherein the guide plate is divided into a plurality of pieces in the weaving width direction of the loom.