JPH0639983U - Compensator cam for multi-axis loom - Google Patents

Abstract

(57) [Summary] [Structure] At both ends in the longitudinal direction of the substantially elliptical compensator cam body 32A having a slightly narrowed central portion in the longitudinal direction, a long hole 53 and mounting bolts 52 are provided to fix the ends of the compensator cam body 32A in the longitudinal direction. An auxiliary cam 50 that can correct the guide cam surface is provided so that its position can be adjusted. [Effect] Even when weaving a thread with low rigidity, by adjusting the position of the auxiliary cam so that the tension of the warp at both ends of the compensator cam is appropriate according to this thread type, the warp at the end of the cloth is woven. It is possible to prevent the size of the mouth from becoming small, and to prevent warp breakage due to the rapier.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present application relates to a compensator cam for adjusting a warp length between a warp supply section and a weaving section of a triaxial weaving machine or the like.

[0002]

[Prior art]

 As a conventional example of the above-mentioned loom, there is one disclosed in JP-A-1-201550, which is a warp supply in which a plurality of warp beams around which a plurality of warp yarns are wound are annularly mounted above a machine frame. Section and a weaving section that is provided below the warp supply section and circulates while weaving them while moving them in opposite directions in the weft direction of a large number of warps of the warp group that face each other across the cloth fell. A compensator cam, which has a substantially elliptical outer periphery and is formed on a guide surface with a slightly constricted central portion in the longitudinal direction, is provided between the two parts, and when the triaxial fabric is woven, the warp yarns supplied from the warp yarn supplying portion to the weaving portion are provided. The cams are slidably guided by the guide cam surface so that the running length of each warp becomes relatively constant.

[0003]

[Problems to be solved by the device]

 In triaxial woven fabrics, etc. made by such a multi-axis loom, the weft yarn portion at an arbitrary position is reliably held by the entanglement with the left and right warp yarns in the middle portion in the width direction, regardless of the rigidity of the yarn. A type of compensator cam with a cam guide surface for highly rigid yarns such as carbon fiber can keep the tension applied to the warp yarns in the middle of the weft width direction constant, so that the warp yarns are crossed before weft insertion. When forming the shed, the crossing position of the warp is such that a large shed that does not interfere with the rapier for weft insertion can be formed. In the case of a highly rigid yarn even at the cloth end, the cam guide surface at the end is formed corresponding to the highly rigid yarn even though the weft is not held by the warp on one side of the cloth end. If so, the rigidity of the weft is high, and thus the warp crossover position at the time of forming the shed can be made to be the same as the warp crossover position in the middle portion, and a large shed can be obtained.

However, when weaving with a yarn having a small rigidity using a compensator cam adapted to such a yarn type having a high rigidity, a so-called warp pitch after weaving becomes narrow near the cloth end, that is, a so-called Weaving occurs. For this reason, the warp yarn near the cloth edge has a shorter weaving length, and the yarn length before weaving is slightly longer than the yarn length in the middle part of the cloth width, and as a result, the warp yarn sags and the tension decreases. Then, when the warp is crossed near the end to form the shed, the warp crossing position is moved from the intermediate warp crossing position in the direction of the non-weaving direction and the shed becomes smaller, so that when the weft insertion is performed with the rapier, There was a problem that it interfered and cut the warp. In order to solve this, it is possible to prepare a large number of compensator cams with different end cam curves and replace the entire compensator cam according to the thread type, but the replacement work is complicated. It is not practical because of the high cost.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present application, a weaving part that circulates a plurality of opposing warp yarns across the weaving fabric in the weft direction and in the opposite direction while circulating, and a weaving part above the weaving part. In the multi-spindle loom, which is provided between the warp and the weaving section, which is provided between the warp and the weaving section, the guide is provided between the warp and the weaving section. The compensator cam is characterized in that auxiliary cams for compensating guide cam surfaces at both ends of the compensator cam body are positionally adjustable at both longitudinal ends of the compensator cam body.

[0006]

[Action]

 When changing the type of thread, adjust the auxiliary cams at both ends of the compensator cam to correct the guide cam surface at the end and adjust the warp tension near the end to adjust the warp tension near the end. Prevent the mouth from becoming smaller.

[0007]

【Example】

 FIG. 1 shows a triaxial weaving loom 1 with some parts omitted. In the triaxial weaving loom 1, 3 is a machine frame fixedly installed, which is constructed by assembling a support column 4, an upper frame 5, and a lower frame 6. An end of an intermediate frame 7 is fixed to the middle of the height of each of the columns 4, and a plurality of support arms 8 are fixed to the intermediate frame 7. Bearing brackets 10 are fixed on the support arms 8 respectively. The horizontal support rollers 9 are provided on the bearing brackets 10 and are rotatable about the horizontal axis, and the horizontal support roller 9 is rotated about the vertical axis to rotate the annular support 16. The ring-shaped support 16 is horizontally rotatable around a suspension frame 28a, which will be described later, by means of a roller (not shown) that restricts movement in the radial direction. The annular support 16 is rotated in one direction at a predetermined speed by a known rotary drive mechanism (not shown). Supports 17 are fixed on the annular support 16 at positions where the circumference is equally divided into a plurality of circles (not shown in this embodiment, 8). The support base 17 is composed of a pair of opposing support plates 18 established on the annular support 16 and a support frame 19 fixed to the upper end thereof, and bearings 20 for beam support are fixed to the support plates 18, respectively. I am doing it. A beam shaft 21a of a beam 21 is rotatably supported by a pair of corresponding bearings 20, and a beam 21 is arranged between adjacent support plates 18. A chain wheel 22 is fixed to the beam shaft 21a.

Reference numeral 35 denotes a rotating shaft supported by a bearing (not shown) attached to each support plate 18. The end of each rotating shaft 35 is connected to the end of an adjacent rotating shaft 35 via a universal joint. A chain wheel 38 is fixed to each rotary shaft 35 at a position corresponding to the chain wheel 22 of the beam 21, and the chain wheel 38 and the chain wheel 22 and a tension chain wheel mounted on a bracket (not shown) are fixed. A chain 38b is wound around 38a and is rotated by a beam rotation motor (not shown). Reference numeral 90 denotes a well-known dropper device, and the annular support 16, the beam 21 provided thereon, its rotating mechanism, the dropper device 90, and the like constitute a warp supply unit 2 for supplying warp to a weaving unit described later. ing.

Next, 23 is an annular thread guide ring fixed to the support frame 19 via a bracket (not shown) and is arranged concentrically with the axis of the suspension frame 28a. A guide reed (not shown) is fixed to the yarn guide ring 23 via a bracket (not shown) so as to guide each warp yarn a fed from each beam 21. Reference numeral 25 is a publicly known triaxial weaving mechanism (weaving section), which is provided with a large number of two heddles 25a arranged facing each other across the cloth fell FL in a row in the weft insertion direction. The warps a are guided to cross each other to form a shed, then the wefts are inserted in that state, the wefts are driven by a beater, and every time the wefts are put in sideways, each heddle 25a alternates in the weft direction in units of rows and reverses each other. The heddle 25a at the end is moved to the other row and the warp yarn a is circulated. Reference numeral 26 denotes a known take-up roller rotatably supported by a frame (not shown) of the triaxial weaving mechanism 25. The take-up roller b is rotated in the arrow direction by a drive mechanism (not shown) to wind the woven cloth b. I'm taking it.

In the triaxial weaving loom 1 as described above, a warp guide device 30 is arranged between the warp supply unit 2 and the triaxial weaving mechanism 25. This warp guide device 30 includes a suspension frame 28a suspended from a horizontal frame 27 integral with the upper frame 5, an elongated support plate 28d fixed to the lower end portion thereof, and a trapezoidal support bracket 28b fixed thereon. It is provided on a support 28 composed of As shown in FIG. 3, the warp guide device 30 includes a compensator cam 32 and a movable yarn guide device 31. The compensator cam 32, which will be described later, is fixed to the upper surface of the mounting bracket 29 fixed to the upper surface 28c of the support bracket 28b. ing. Further, sprockets 34 are rotatably supported on the left and right sides of the upper surface of the support plate 28d of the support bracket 28b, and a plurality of thread guides 31a are connected to a chain 35 wound around these sprockets 34 and passed through a compensator cam 32. The warp thread is guided to the triaxial weaving mechanism 25 through the guide hole 31b. One of the sprockets 34 is positively rotated by a driving means (not shown), and constitutes a movable yarn guide device 31 which rotates the warp a in the weft direction in synchronization with the movement of the heddle 25a of the triaxial weaving mechanism 25.

As shown in FIGS. 2 and 3, the compensator cam 32 includes a compensator cam body 32 A and an auxiliary cam 50. The compensator cam body 32A is formed on a guide cam surface 32a having a substantially elliptical outer circumference and a slightly narrowed central portion in the longitudinal direction. The guide cam surface 32a has a warp yarn a (for example, a rigid yarn) of a specific yarn type. The high carbon fibers are set so that their traveling paths are substantially the same when they are drawn from each beam 21 and guided to the triaxial weaving mechanism 25. An auxiliary cam 50 having guide cam surfaces 50a for compensating for the guide cam surfaces at the ends of the compensator cam body 32A is provided at both ends in the longitudinal direction of the upper surface of the compensator cam body 32A, and its position can be adjusted through a mounting mechanism 51. It is provided. The guide cam surface 50a of the auxiliary cam 50 is formed into an arcuate curved surface having a slightly smaller radius of curvature than the curved surfaces at both ends in the longitudinal direction of the guide cam surface 32a of the compensator cam body 32A. Next, the mounting mechanism 51 will be described. A pair of left and right mounting bolts 52 are screwed to predetermined positions on both ends in the longitudinal direction of the compensator cam body 32A. A slot 53a (shown in FIG. 3) of the mounting bolt 52 is loosely fitted with a long hole 53 formed in the rear portion of the auxiliary cam 50, and a washer 54 and a mounting nut 55 are used to remove the compensator cam body 32A from the compensator cam body 32A. The auxiliary cam 50 is integrated and positioned. Therefore, for a yarn having high rigidity, the guide cam surface 50a of the auxiliary cam 50 is located on the upper surface of the compensator cam body 32A and the warp thread a guides the compensator cam body 32a, as shown by the phantom line in FIG. The auxiliary cam 50 is positioned so that it is guided only by the cam surface 32a, and as shown by the solid line in FIG. Are projected from both longitudinal ends of the compensator cam main body 32A, and during weaving of the loom 1, the warp threads a are guided to the guide cam surfaces 50a of the auxiliary cams 50 at both end portions of the compensator cam main body 32A so that the travel route is the compensator center cam main body. The auxiliary cam 50 is positioned such that it is longer than the warp running path in the middle portion of 32A.

The positioning of the auxiliary cam 50 as described above is preliminarily tested depending on the type of yarn (rigidity of the yarn) and the like, and the tension of the warp yarn a at both longitudinal end portions of the compensator cam 32 is appropriate during weaving. Thus, when the warp yarns a cross each other to form a shed, the position of the auxiliary cam 50 is set as data so that the shed has the same size as the shed at the middle portion in the cloth width direction, and the weaving is performed. The position shall be adjusted based on this data when changing the thread type to be used. The width of the long hole 53 of the auxiliary cam 50 is set to a value larger than the diameter of the threaded rod portion 52a of the mounting bolt 52, and the auxiliary cam 50 can be finely adjusted in the left-right direction with respect to the compensator cam body 32A. It is possible.

Next, the operation of the triaxial weaving loom 1 configured as described above will be described. Now, assume that the type of yarn to be woven is of a type having a small rigidity such that weaving shrinkage occurs at the cloth end portion, and the positioning of the auxiliary cam 50 relative to the compensator cam body 32A is performed with reference to FIGS. It is in the state shown by the solid line. When the triaxial weaving machine 1 starts to operate, the heddle 25a of the triaxial weaving mechanism 25 guides and crosses the warp a to form a shed and at the same time weft inserts with a rapier and pushes it into the cloth fell with a beater. Then, the woven cloth b is woven. During weaving, each time the weft is inserted, the heddles 25a on both sides alternately move laterally in the direction of the arrow in FIG. 2 to rotate the warp in one direction. Further, the yarn guide 31a of the movable yarn guide device 31 and the annular support 16 synchronously rotate in the rotation direction of the heddle 25a, and the warp yarns a drawn out from the respective beams 21 are rotated in the same direction. Further, the winding roller 26 winds the woven fabric b, and the warp yarn a is pulled out from each beam 21 by pushing the weft yarn by the beater. At this time, except for the longitudinal end portions of the compensator cam 32, the warp threads a are slidably guided by the guide surfaces 32a of the compensator cam body 32A, and at the longitudinal end portions of the compensator cam 32, the warp threads a of the auxiliary cam 50 are provided. It is slidably guided by the guide surface 50a. Therefore, the traveling route of the warp yarn a guided by the auxiliary cams 50 at both ends of the compensator cam 32 is longer than the traveling route of the warp yarn a guided by the compensator cam body 32A, and the sagging of the end warp yarn a due to the weaving shrinkage is prevented. As a result, the tension of all warps a is kept the same, and as a result, the crossing position of all the warps a guided by the compensator cam 32 can form a large shed that does not interfere with the rapier for weft insertion. Such a position makes it possible to prevent the rapier from interfering with the warp crossing portion during weft insertion and cutting the warp as in the conventional case. After that, when changing the type of yarn, etc., after adjusting the position of the auxiliary cam 50 by adjusting the mounting bolt 52 and the mounting nut 55 based on the preset test data, the operation of the triaxial weaving machine 1 is performed again. To start.

[0014]

[Effect of device]

 As described above, in the present application, the auxiliary cams for correcting the end guide cam surfaces of the compensator cam body are provided at both ends in the longitudinal direction of the compensator cam body so that the position of the auxiliary cam can be adjusted. By adjusting the position of the auxiliary cam according to this yarn type, the crossing position of all the warps guided by the compensator cam is set to a position where a weft-inserted rapier can form a large shed without interference. It is possible to prevent warp breakage due to the rapier during weft insertion.

[Brief description of drawings]

FIG. 1 is an overall view of a loom according to the present application.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a view as seen from III in FIG.

[Explanation of symbols]

1 loom, 2 warp supply section, 25 weaving section, 32
Compensator cam, 32A compensator cam body, 50 auxiliary cam

Claims (1)

[Scope of utility model registration request] 1. A weaving section in which a large number of opposing warp threads sandwiching a weaving cloth are circulated while being circulated while moving in the weft direction and in opposite directions, and above the weaving section as the warp moves in the weaving section. Compensator cam body in a multi-spindle loom for slidingly guiding the warp and adjusting the warp length between the warp supply part and the weaving part. Compensator cam for a multi-spindle loom, in which auxiliary cams for compensating guide cam surfaces at both ends of the compensator cam body are provided at both longitudinal end portions so as to be positionally adjustable.