CN105040245A - Easing roller retracting device for loom - Google Patents

Abstract

The utility model provides a device for loose warp roller keeps out of way in loom, said loom includes: the loose warp roller, it can swingingly support when the loom puts up wind by the warp of being seen off by the warp axle and hang, the position when weaving is set for to be done, in orientation from top to bottom at least some lie in than the upper end of the warp axle position below more, loose warp mechanism, its with the loose warp roller joins and makes the swing of said loose warp roller to this absorbs accompanys the tension change of weavining the warp of produced loom in the one-period. Said loose warp mechanism constitution does, can make loose warp roller swing displacement is to surpassing when weavining the retreating position of the hunting range of said loose warp roller, promptly the lower extreme of loose warp roller is located and compares the upper end of warp axle is the retreating position of top more. This device does not make the structure of loom become complicated to do not produce the retreating position who disturbs to the warp axle in the time of can conveniently moving (promotion) to the handling operation advancing menstruation yarn axle with the loose warp roller.

Description

The Withdraw and keep-off device of loose warp roller in loom

Technical field

The present invention relates to the Withdraw and keep-off device of loose warp roller in a kind of loom, particularly relate to the Withdraw and keep-off device of the loose warp roller in a kind of loom comprising loose warp roller and easing mechanism, wherein said loom comprises: loose warp roller, while it is supported in loom frame swingably by sent by warp shaft warp thread institute around extension, position when weaving is set to, be positioned at least partially in the vertical direction than warp shaft upper end (referring to the upper end of warp shaft flange portion in more detail) more below position; Easing mechanism, itself and described loose warp roller link and described loose warp roller are swung, and absorb the tension change with weaving produced loom warp thread in one cycle with this.

Background technology

As the loom with easing mechanism as above, such as, there is loom disclosed in patent document 1.In the loom disclosed in this patent document 1, the warp thread of being drawn by warp shaft by as cord roller the 1st roller institute around extension after, by as loose warp roller the 2nd roller institute around hangs and change direction guiding fell side.Wherein, cord roller (the 1st roller) is set to, even if the coil diameter of warp thread changes in warp shaft, being wrapping with angle and also can not changing of the relative loose warp roller of warp thread (the 2nd roller), in general, it is arranged on the upstream side of the warp thread course of relative loose warp roller, namely than loose warp roller more below position.

Further, in the loom of patent document 1, loose warp roller (the 2nd roller) is supported in loom frame swingably by loose warp arm.Specifically, respectively in the left and right frame of loom, one end of loose warp arm is supported rotationally by back shaft, and loose warp roller is supported in the central authorities of loose warp arm in the place of axle portion at its two ends.So loose warp roller is supported in swingably on loom frame centered by the axle center supporting the back shaft of loose warp arm.

In addition, the other end of loose warp arm is linked with easing mechanism, it comprises the loose warp bar be connected with loose warp arm and the eccentric drive mechanism (crank-type driver) be connected with loose warp bar.This eccentric drive mechanism is synchronous with the rotation of loom (main shaft), often rotates within 1 week, also follow the rotation ratio of 1 week to be driven in rotation with main shaft.Loom in patent document 1 has the positive easing mechanism as easing mechanism.And, in this positive easing mechanism, along with the rotation of eccentric drive mechanism, loose warp bar moves back and forth on fore-and-aft direction (loose warp roller is to the warp thread bearing of trend of fell), thus make loose warp arm reciprocating rotation centered by described back shaft, and then make loose warp roller centered by the axle center of described back shaft reciprocally swinging to carry out easing motion.Wherein, the effect of this easing motion is, in order to relax the tension change of the warp thread that (absorption) loom causes because of harness motion etc. one-period (once beat up being equivalent to beat up from certain in a series of actions carried out when loom is weaved, or be equivalent to main shaft rotate to the process between 360 ° of positions from 0 ° of position).

But, in order to repair when making cracked ends is easily carried out in loom, or in order to improve the operability of loom, it is desirable to the Warp line (being equivalent to the warp thread height and position from loose warp roller to fell) when weaving to arrange lower.But to Warp line be arranged lower, be necessary the height and position reducing the loose warp roller forming Warp line.But in loom when the warp thread on warp shaft exhausts, or need to carry out warp shaft when changing axle etc. and change operation, this replacing operation carries out the handling of warp shaft by rotating the warp shaft be located on the thread guide of loom frame, but when the height and position of loose warp roller is lower, when carrying out these handling, warp shaft can produce interference to loose warp roller, therefore, the height and position of loose warp roller can only be arranged at present and can not produce on the higher position of interference warp shaft.

In addition, Patent Document 2 discloses the cord roller (patent document 2 is called rear roller) mobile (liftings) that is arranged in than loose warp roller more lower position to retreating position during replacing warp shaft.So, this just means that the height and position of loose warp roller is set at the position that can produce described interference equally, namely in the vertical direction at least partially than warp shaft upper end more below position, when changing warp shaft, needing loose warp roller to move to and can not produce on the retreating position of interference warp shaft.But problem is, loose warp roller is different from the cord roller as research object in patent document 2, and because it is linked with the easing mechanism exemplified in patent document 1, the mobile operating therefore carried out toward retreating position becomes very suffering.

Such as, for loom disclosed in patent document 1, in order to loose warp roller is moved to retreating position, first the link between the linkage comprised in easing mechanism and loom frame should be disconnected, that is the link between loose warp arm and loose warp bar or between loose warp bar and eccentric drive mechanism must be disconnected, certainly, after installation warp shaft, also the part of disconnection must be linked again and carry out the operations such as debugging.And, as described above when disconnecting linking portion, with the part of the linkage under the interconnected state of loose warp roller because the reasons such as loose warp roller self gravitation can be subjected to displacement rapidly, for avoiding danger, in the disconnection operation process carrying out linking, must fix the state of loose warp arm etc., this operation needs certain muscle power and has larger complexity.

Further, due to loose warp roller be with the state interconnected at least partially of described linkage under move to retreating position, be only therefore the larger parts of weight with regard to loose warp roller itself, can have imagined that this operation is very large to the requirement of muscle power thus.In addition, as the lowering or hoisting gear of cord roller disclosed in patent document 2, the special mechanism for promoting loose warp roller can be considered to be attached to loom.But the mechanism in this case, in loom near carrying device by become more complicated while also can cause the raising of loom holistic cost.And, even if to loose warp roller carry out mechanical type promote time, be also necessary the disconnection operation of the link between the linkage that carries out comprising in described easing mechanism and loom frame, so still keep away the complexity of unavoidable operation.

[look-ahead technique document]

[patent document]

[patent document 1] Japanese Patent Laid-Open 2004-250817 publication

The flat 09-111600 publication of [patent document 2] Japanese Patent Laid-Open

Summary of the invention

Invent problem to be solved

In view of problem existing in above-mentioned prior art, the object of the invention is to provide a kind of Withdraw and keep-off device of the loose warp roller premised on previously described loom, it can under the prerequisite not making the structure of loom become complicated, when warp shaft carries out handling operation, make loose warp roller move (lifting) and be more prone to becoming the operation of the retreating position of warp shaft generation interference.

For solving the technical scheme of problem

In order to solve the present invention of above-mentioned problem, it is characterized in that, above-mentioned as in the loom of prerequisite, easing mechanism is configured to, loose warp roller can be made in the vertical direction to swing the retreating position being moved to the hunting range exceeding loose warp roller when weaving, and namely the lower end of loose warp roller is positioned at the retreating position of the upper end more top than warp shaft.

In addition, easing mechanism described in the present invention is positive easing mechanism, and it comprises: the linkage linked with loose warp roller; The driving shaft rotated with the spindle synchronous of loom; By the actuator of this driving shaft rotary actuation; And eccentric shaft, it is supported by described actuator, be set to make axis deviation support the axle center of the back shaft of this actuator, and be located at the loose warp bar comprised in described linkage loose warp roller opposition side an end on linking part and described linkage is moved back and forth in the longitudinal direction, this positive easing mechanism also can be configured to, the offset in the axle center of the relatively described back shaft in axle center of described eccentric shaft, the 1st offset as offset when weaving can be set as, and described loose warp roller is moved to the 2nd offset of described retreating position.

Also have, described positive easing mechanism can be crank-type positive easing mechanism, wherein said actuator is supported by described driving shaft and described driving shaft plays a role as described back shaft, this crank-type positive easing mechanism can comprise: turning cylinder, it is supported by described driving shaft, is set to the axle center making driving shaft described in axis deviation; Driving member, it is arranged in the mode around this turning cylinder, and is supported in described turning cylinder by bearing with the state that can relatively rotate; Fastener, it can prevent the relative rotation of described turning cylinder and described driving member, in addition, described loose warp bar also can be configured to, and in centre can with described driving member engage while being linked to described driving member rotationally by the connection shaft being intercalated in a described end.

Can be in addition: when weaving, described loose warp bar engages in described centre and described driving member, prevent the described loose warp bar at described connection shaft place from making described driving member and described loose warp bar be in the common state operated of one relative to rotating of described driving member thus, while described driving member plays a role as described linking part, described turning cylinder plays a role as described eccentric shaft and makes the offset in the axle center of the relatively described driving shaft in the axle center of described turning cylinder be described 1st offset.When described loose warp roller is kept out of the way, described locking between described driving member with described loose warp bar is prevented the state of the relative rotation of described turning cylinder and described driving member while removing described loose warp bar is in state that described connection shaft place can rotate relative to described driving member by described fastener, while the part of connection shaft described in the intercalation in described loose warp bar plays a role as described linking part, described connection shaft plays a role as described eccentric shaft and makes the offset in the axle center of the relatively described driving shaft in the axle center of described connection shaft be described 2nd offset.

Invention effect

According to the present invention, the tension change of loom warp thread in one cycle when weaving to absorb, utilizing makes the loose warp roller being supported in loom frame swingably carry out the easing mechanism of the easing motion caused by reciprocally swinging, this easing mechanism is configured to, loose warp roller can be made to swing the retreating position being moved to the hunting range exceeding loose warp roller when weaving, namely the lower end of loose warp roller is positioned at the retreating position of the upper end more top than warp shaft, loose warp roller can be moved to retreating position and without the need to arranging Special lifting device.Further, because make loose warp roller move to retreating position by the swing of the loose warp roller caused by easing mechanism, so without the need to disconnecting the link between linkage and loom frame comprised in easing mechanism, therefore making operation become and being more prone to carry out.

And, if using described easing mechanism as, utilize by the actuator of driving shaft rotary actuation, the eccentric shaft supported by this actuator and interconnected with this eccentric shaft while the linkage that links with loose warp roller make loose warp roller carry out the positive easing mechanism of oscillating motion by the rotation of driving shaft, just can without the need to manual operation, only loose warp roller need can be moved (lifting) to retreating position by the driving of machinery, thus the operation making loose warp roller move to retreating position becomes and is more prone to carry out.

And, the offset in the axle center of the relatively described back shaft in axle center of the described eccentric shaft in described positive easing mechanism, the 1st offset when weaving can be set to, and loose warp roller is moved to the 2nd offset of retreating position, thus when loose warp roller is moved to retreating position, only the described offset in easing mechanism need be set to the 1st offset Status Change to the state being set to the 2nd offset by original, the operation therefore making loose warp roller move to retreating position will become and be more prone to carry out.

In addition, described positive easing mechanism is configured to, when weaving and when loose warp roller moves to retreating position, can switch the parts (connection shaft) of parts (turning cylinder) and described 2nd offset of formation that the axle center of relative drive shaft forms described 1st offset, thus more small-sized device can be utilized to carry out the change (switching) of described offset.

Accompanying drawing explanation

Fig. 1 is the side view that display is suitable for the state of loom when weaving of the loose warp roller Withdraw and keep-off device according to the present invention the 1st embodiment.

Fig. 2 is the plane that display is suitable for an example of the loom according to loose warp roller Withdraw and keep-off device of the present invention.

Fig. 3 is the approximate three-dimensional map that display is suitable for an example of the loom according to loose warp roller Withdraw and keep-off device of the present invention.

Fig. 4 is that display is according to the side view of the key position of the easing mechanism in the loose warp roller Withdraw and keep-off device of the present invention the 1st embodiment and cut-away section plane.

Fig. 5 is that display is according to the side view of some details of the easing mechanism in the Withdraw and keep-off device of the loose warp roller of the present invention the 1st embodiment and fragmentary cross-sectional view.

Fig. 6 is the side view that display is suitable for the state of loose warp roller when keeping out of the way of the loom of the Withdraw and keep-off device of the loose warp roller according to the present invention the 1st embodiment.

Fig. 7 is the application drawing of display according to the key position in the easing mechanism of the Withdraw and keep-off device of the loose warp roller of the present invention the 1st embodiment.

Fig. 8 is that display is according to the side view of other embodiment of loose warp roller Withdraw and keep-off device of the present invention and the enlarged drawing of key position.

Fig. 9 is for being presented at the application drawing of the state of other embodiment when weaving and when loose warp roller keeps out of the way shown in Fig. 8.

Figure 10 is that display is according to the side application drawing of the state of other embodiment when weaving of loose warp roller Withdraw and keep-off device of the present invention and the enlarged drawing of key position.

Figure 11 is for being presented at the side application drawing of the state of other embodiment when loose warp roller is kept out of the way shown in Figure 10 and the enlarged drawing of key position.

Figure 12 is the side view of display according to the other again embodiment of loose warp roller Withdraw and keep-off device of the present invention.

Symbol description

1-loose warp roller; 3-tension detect bar; 5-force cell (tension detector); 7-the 1st back shaft; 9-the 2nd back shaft; 11-pull bar (support bar); 13-driving shaft; The axle center of 13a-driving shaft; 20-eccentric drive mechanism; 21-crank boss (actuator); 22-support; 22b-axle portion (eccentric shaft); The axle center in 22b1-axle portion; 22c-through hole; 22d-limiting unit; 23-driving member; 23b-through hole; 23c-the 1st connecting portion; 23d-the 2nd connecting portion; 23e-internal thread hole; 24-bearing; 25-connecting pin (connection shaft/eccentric shaft); The axle center of 25a-connecting pin; 26-screw element (fastener); 30-linkage; 31-loose warp bar; 31a-connecting rod; 31b-connecting piece; 32-loose warp arm; 35-loose warp bar; 37-loose warp spring; 40-eccentric drive mechanism; 41-crank disk (actuator); 43-eccentric shaft; The axle center of 43a-eccentric shaft; 45-position adjusting mechanism; 45a-ball-screw; The driven nut of 45b-; 50-cam drive mechanism; 51-cam; 52-cam lever (actuator); 52d-cam ball; 53-connecting piece; 53b-axle portion; The axle center in 53b1-axle portion; 54-back shaft (back shaft of actuator); The axle center of 54a-back shaft; 60-bar length regulating device; 61-the 1st connecting piece; 62-the 2nd connecting piece; 63-ball-screw; 64-support member; E1, E2, E3, E4-easing mechanism; F-loom frame; GR-cord roller; T-warp thread; WB-warp shaft.

Detailed description of the invention

Below in conjunction with Fig. 1 to 7, be described for the embodiment based on loose warp roller Withdraw and keep-off device of the present invention.And following examples adopt crank-type positive easing mechanism as the example of easing mechanism in the present invention.

Being suitable for loom of the present invention is device as shown in Figures 1 to 3, pairing left and right loom frame F, F that woven pieces direction is provided separately are made up of support body Fb and the bracing frame Fa being positioned at the upper surface sending side part that is arranged on support body Fb respectively, and loose warp roller 1 and cord roller GR are supported on loom frame F in the place of axle portion 2 at its two ends by bracing frame Fa.Further, in the loom of the present embodiment, the structure of loom frame F, F of the left and right sides is all identical, therefore, is substantially only described in detail for the structure of wherein side below.And in the following description, be called inner side by all parts on woven pieces direction by loom center side, its reverse side is called outside.In addition, bearing of trend from loose warp roller 1 to the warp thread T of fell (diagram slightly) is called fore-and-aft direction, loose warp roller 1 side (warp thread T sends side) on this fore-and-aft direction is called front side (front), is called rear side (rear) with loose warp roller 1 opposite side (loose warp roller opposition side/fell side).

In the bracing frame Fa of loom frame F, the 1st back shaft 7 is set to, outstanding from the inner side end of bracing frame Fa towards inner side in the mode extended in parallel with woven pieces direction.And tension detect bar 3 by bearing rotationally support by the 1st back shaft 7.That is, tension detect bar 3 by the 1st back shaft 7 rotationally support by loom frame F.

In illustrative example, tension detect bar 3 have the cylindrical support portion 3a that supports by the 1st back shaft 7 and 2 arms 3b, 3c being integrally formed in the mode of giving prominence to from support portion 3a outer peripheral face.These 2 arms 3b, 3c are set to be positioned at the both sides of support portion 3a (the 1st back shaft 7) axis and extend with described axes normal.Further, the end of the arm 3b extended downward in these 2 arms 3b, 3c is linked with force cell 5.The formation of this force cell 5 comprises the force cell main body 5a of S type and is arranged on connecting rod 5b, 5b of both sides, heavy burden direction of force cell main body 5a.Further, force cell 5 utilizes the connecting rod 5b of opposite side to be supported on bracing frame Fa by spherical bearing while utilizing the connecting rod 5b of side to be linked to the arm 3b of tension detect bar 3 by spherical bearing.Therefore, the tension detect bar 3 be rotatably supported on loom frame F is linked to loom frame F in this arm 3b place by force cell 5, and the phase place of the 1st back shaft 7 axis is then fixed (maintenance) by force cell 5.

Further, in illustrative example, the end of the arm 3c extended upward in 2 arms 3b, 3c of tension detect bar 3 is formed as cylindrical, and this cylinder-shaped end is formed with through hole.Further, the 2nd back shaft 9 is made to be intercalated in arm 3c by being intercalated in the bearings such as the needle bearing of described through hole.That is, the 2nd back shaft 9 in arm 3c place rotatably support by tension detect bar 3.And as mentioned above, the phase place of its 1st back shaft 7 axis of tension detect bar 3 is fixed (maintenance) by force cell 5.Therefore, the position of the 2nd back shaft 9 is also fixed on the 1st back shaft 7 axis.

Further, the 2nd back shaft 9 extends along woven pieces direction from this Support Position while being supported by tension detect bar 3 at side end place in the inner laterally.And pull bar 11 is fixed on the 2nd back shaft 9, namely than the position of the more lateral, Support Position of tension detect bar 3 between tension detect bar 3 and bracing frame Fa.

Pull bar 11 has the parts of through hole for both ends, and the end of side has opening clamping structure, and this opening clamping structure is formed with the otch that is communicated to through hole from edge and makes through hole undergauge by the 11a that tights a bolt.And pull bar 11 (is about 90 °) at a predetermined angle by the 2nd back shaft 9 fixed supports with the arm 3c of tension detect bar 3 on the end of side with this opening clamping structure in illustrative example.

Further, the axle portion 1a of loose warp roller 1 is intercalated in the end of pull bar 11 opposite side by the bearing be inlaid in this through hole.So, in loose warp roller 1 its both ends axle portion 1a by pull bar 11 support by the 2nd back shaft 9.Moreover each tension detect bar 3,3 arranged respectively in pairing left and right loom frame F, F fixes the phase place of the 1st back shaft 7 axis by force cell 5, observe from the side to make the lead to the hole site in arm 3c and almost mutually align.Therefore, the shaft core position of the 2nd back shaft 9,9 arranged respectively in two loom frame F, F is observed from the side and is also almost alignd.Further, pull bar 11 fix by the 2nd back shaft 9, form identical angle to make tension detect bar 3 and pull bar 11 in each side of two loom frame F, F.Thus, loose warp roller 1 with the state extended in parallel with the 1st back shaft 7 and the 2nd back shaft 9 support by pull bar 11.

And, be plane extraction from warp shaft WB and the many warp thread T guided by cord roller GR around hanging over loose warp roller 1.So, by above structure, the load acted on loose warp roller 1 due to the tension force of warp thread T finally acts on force cell 5 through the transmission of pull bar 11, the 2nd back shaft 9 and tension detect bar 3, and force cell 5 is by detecting this load to measure the tension force of warp thread T.So in the present embodiment, loose warp roller 1 as absorb weave time the loom easers of the tension change of warp thread T in one cycle some play a role while, also play a role as the tension-sensing roller in the tension detecting apparatus of the tension force for detecting warp thread T.

Further, the 2nd back shaft 9 supporting loose warp roller 1 in the present embodiment extends laterally from the Support Position of tension detect bar 3, extends to the outside of loom frame F.And, the outboard end of the 2nd back shaft 9 is linked with the easing mechanism making loose warp roller 1 oscillating motion in the longitudinal direction (easing motion).In addition, in the present embodiment, the 2nd back shaft 9 support by tension detect bar 3 while also in than pull bar 11 more lateral place support by the bracing frame Fa of loom frame F.In more detail, through hole is formed in the bracing frame Fa of loom frame F, this through hole is arranged in the position that its central axis roughly aligns with the through hole 3c1 central axis that the arm 3c of tension detect bar 3 is formed, by be inlaid in bearing in this through hole support by bracing frame Fa.That is, in the 2nd back shaft 9, also rotatably supported by loom frame F (bracing frame Fa) while the end of the part more outstanding than loom frame F (bracing frame Fa) is rotatably supported by tension detect bar 3.

In the present embodiment, easing mechanism E1 is crank-type positive easing mechanism, comprise as drive unit eccentric drive mechanism 20 and the running of eccentric drive mechanism 20 is passed to the linkage 30 of the 2nd back shaft 9.Further, as shown in Fig. 1 etc., linkage 30 comprises the loose warp bar 31 being linked to eccentric drive mechanism 20 and the loose warp arm 32 linking the 2nd back shaft 9 and loose warp bar 31.

The loose warp arm 32 of linkage 30 has opening clamping structure on both ends, and it is set as: extend downwards from the coupling position with the 2nd back shaft 9 while an end is fixedly clamped by the 2nd back shaft 9.Further, the other end of loose warp arm 32 has been fixedly clamped connection shaft 32a.On the other hand, the formation of loose warp bar 31 is included in an end of rear side (hereinafter referred to " rearward end ".) connecting piece 31b on the connecting rod 31a that links with eccentric drive mechanism 20 and the other end being arranged on front side of connecting rod 31a, be embedded with spherical bearing (diagram summary) in the through hole that the anterior end of this connecting piece 31b is formed.

And loose warp arm 32 and loose warp bar 31 by the connection shaft 32a intercalation being fixed on loose warp arm 32 the other end being fixed in the spherical bearing inner ring be inlaid on the connecting piece 31b of loose warp bar 31, thus link mutually rotationally.So in this linkage 30, loose warp bar 31 is eccentrically driven mechanism 20 and back and forth drives in the longitudinal direction, thus loose warp arm 32 reciprocally swinging centered by the axle center of the 2nd back shaft 9.Its result, 2nd back shaft 9 reciprocating rotation in the angular range corresponding with the oscillating quantity of loose warp arm 32, so the loose warp roller 1 be supported on the 2nd back shaft 9 by pull bar 11 carries out oscillating motion (easing motion) centered by the axle center of the 2nd back shaft 9.

And, eccentric drive mechanism 20 has identical structure substantially with crank-type driver disclosed in the Japanese Patent Laid-Open 2008-180289 publication of earlier application, as shown in Fig. 4,5 in detail, it comprises: as the crank boss 21 of actuator, the support 22 be fixed on crank boss 21, the driving member 23 that can be supported in the relative rotation on support 22.In addition, Fig. 5 extracts crank boss 21, support 22 and driving shaft 13 separately and the figure of display from Fig. 4.Below, the structure for this eccentric drive mechanism 20 is described in further detail.But because this eccentric drive mechanism 20 is set to be supported in the state the driving shaft 13 given prominence to laterally from the side of loom frame F, therefore in the following description, the front (anti-loom frame F side) of driving shaft 13 in each parts is called outside, and loom frame F side is called inner side.

Crank boss 21 is fixed on the leading section of the driving shaft 13 given prominence to laterally from loom frame F.That is, in the present embodiment, crank boss 21 driven shaft 13 as actuator supported, thus driving shaft 13 and back shaft have public axis.And, to link with the main shaft (illustrate summary) of loom while the support body Fb of the relative loom frame F of this driving shaft 13 is rotatably supported, and synchronous with the rotation of the main shaft of loom, rotate with the main shaft ratio also and then rotated a circle that often rotates a circle.

Further, crank boss 21 has: the axle portion 21a being formed with the through hole 21d with driving shaft 13 with roughly the same diameter and the flange portion 21b be integrally formed with axle portion 21a.In addition, the axle portion 21a of crank boss 21 has opening clamping structure, and it comprises the otch formed in the mode be communicated with through hole 21d.And crank boss 21 is intercalated in the state of through hole 21d with driving shaft 13, be fixedly clamped on driving shaft 13 by the opening clamping structure being formed at axle portion 21a.

Support 22 has: be fixed on the tabular installation portion 22a on the flange portion 21b of crank boss 21, and to give prominence to and as the axle portion 22b of the turning cylinder be integrally formed with installation portion 22a from this installation portion 22a inner side end.Further, axle portion 22b be formed through axle portion 22b and form the through hole 22c of opening in installation portion 22a end face outside.

And, the state that support 22 runs through through hole 22c with driving shaft 13 is arranged, and the end face outside of installation portion 22a to be abutted the state to the flange portion 21b inner side end of crank boss 21, be assemblied on crank boss 21 by multiple (illustrative example the has 3) screw element be screwed into from crank boss 21 side.So the axle portion 22b of support 22 is by carrying out assembling to be formed to be supported in as the state on the crank boss 21 of actuator by installation portion 22a using support 22 and the crank boss 21 be fixed on driving shaft 13.

Further, support 22 is assemblied on crank boss 21 in the mode of the axle center 13a bias of the axle center 22b1 relative drive shaft 13 of axle portion 22b.Therefore, in the construction illustrated, eccentric for allowing the driving shaft 13 of relative axle portion 22b, the through hole 22c that driving shaft 13 runs through at least is greater than the diameter of driving shaft 13 on eccentric direction.

In addition, on described eccentric direction, in schematic structure, as shown in Fig. 5 in detail, support 22 has a pair limiting unit 22d, 22d, this a pair limiting unit 22d, 22d is used for location, and the end face outside from the installation portion 22a of support 22 while grasp drive shaft 13 under being arranged in the state that driving shaft 13 runs through through hole 22c is given prominence to.Further, each limiting unit 22d has the restriction face 22d1 in the plane that extends straight, extends abreast the while that restriction face 22d1,22d1 of two limiting unit 22d, 22d being formed as opposed facing.

Further, in crank boss 21, be provided with the cylindrical pilot part 21c giving prominence to formation from the inner side end of flange portion 21b, on the other hand, be assemblied in the gathering sill 22e being formed with the guide part 21c being embedded with crank boss 21 in the support 22 on crank boss 21.And, the gathering sill 22e of support 22 is formed as making its width consistent with the bearing of trend of the restriction face 22d1 of limiting unit 22d, and the size on width is roughly the same with the diameter of the guide part 21c of crank boss 21, the size simultaneously on length direction (with the direction that width is perpendicular) is greater than the diameter of guide part 21c.

Thus, when not carrying out screw element and being fixing, under the state that guide part 21c embeds gathering sill 22e and support 22 is assembled with crank boss 21, the crank boss 21 that support 22 relatively can be fixed on driving shaft 13 on the length direction of gathering sill 22e carries out displacement.And the location of support 22 opposing cranks hub 21 is by the restriction face 22d1 of the limiting unit 22d in support 22 being connected to the side that is formed in crank boss 21 and a side in a pair end face 21e, 21e extending parallel to each other realizes.In addition, be formed in the elongated hole in Kong Weiyu end face 21e orthogonal directions that the screw element on crank boss 21 runs through, thus it is fixing all can to carry out between crank boss 21 and support 22 under the state abutting any one party in a pair end face 21e, 21e of crank boss 21 at support 22.

And, in crank boss 21 and support 22, the size of the size of through hole 21d in crank boss 21 to end face 21e and the axle center 22b1 to restriction face 22d1 of support 22 middle shaft part 22b is set, under the state abutted against to make the restriction face 22d1 of the limiting unit 22d in the end face 21e of crank boss 21 and support 22, the axle center 22b1 of the axle portion 22b of support 22 is made to be in the eccentric state of the axle center 13a of relative drive shaft 13.

So, at support 22 opposing cranks hub 21 by under the state of locating, the axle center 13a that the axle center 22b1 of the axle portion 22b in support 22 parallels relative drive shaft 13 on direction at the length direction of the gathering sill 22e with support 22 is eccentric, and the direction that the length direction of this gathering sill 22e is namely perpendicular with the restriction face 22d1 of limiting unit 22d in support 22 is eccentric direction.Wherein, in the structure shown in Fig. 4,5, under any state in the state that limiting unit 22d on the right side of the state (shown position) that the end face 21e of the limiting unit 22d on the left of the drawing of Fig. 5 (b) and support 22 abuts against and drawing and the end face 21e of support 22 abuts against, the axle center 22b1 of the axle portion 22b of support 22 all with the described eccentric direction of the axle center 13a of relative drive shaft 13 in the same side, in the state that right side in accompanying drawing is eccentric.But it is not identical at the offset of the axle center 13a of the axle center 22b1 relative drive shaft 13 of these 2 kinds of state lower shaft portion 22b.That is, utilize the eccentric drive mechanism 20 of the present embodiment can set relative loose warp roller 1 and carry out the different offset of needed for easing motion two kinds.

Driving member 23 is supported with by bearing 24 in axle portion 22b as the turning cylinder of support 22.In more detail, driving member 23, to be roughly discoidal pedestal 23a, is formed with the through hole 23b than the axle portion 22b of support 22 with larger diameter in this pedestal 23a.And the outer shroud of the bearing 24 that driving member 23 is fixed in the axle portion 22b of support 22 by inner ring is fitted and fixed with in through hole 23b, surrounds the mode of the axle portion 22b of support 22 with through hole 23b inner peripheral surface, can be supported with the relative rotation by support 22.

Further, driving member 23 has the 1st and the 2nd connecting portion 23c, 23d for linking loose warp bar 31.1st connecting portion 23c and the 2nd connecting portion 23d is set as and gives prominence to the side of the form be clipped in the middle by through hole 23b from pedestal 23a.And the rearward end of the connecting rod 31a in loose warp bar 31 is attached on the 1st connecting portion 23c by the connecting pin 25 as connection shaft.

In more detail, the 1st connecting portion 23c of driving member 23 is formed with the through hole 23c1 of intercalation connecting pin 25, on the other hand, the rearward end of the connecting rod 31a in loose warp bar 31 is also formed with the jack 31c1 of intercalation connecting pin 25.In addition, connecting pin 25 has location major diameter plunger.And, driving member 23 and connecting rod 31a assemble by being intercalated in the jack 31c1 of connecting rod 31a by the connecting pin 25 inserted inside the through hole 23c1 of driving member 23, abut the state of the 1st connecting portion 23c of driving member 23 with the plunger of connecting pin 25, connecting pin 25 is fixed on connecting rod 31 by utilizing the housing pin (diagram slightly) be screwed into from the side of the rearward end connecting rod 31a thus makes both link together.In addition, connecting pin 25 is that intercalation prevents it from coming off by plunger in driving member 23, makes both relatively rotate.So connecting rod 31a (loose warp bar 31) is linked to driving member 23 by the connecting pin 25 being fixed on self with rotating state.

Under the state that connecting rod 31a in the loose warp bar 31 linked with the 1st connecting portion 23c of driving member 23 makes loose warp roller 1 carry out easing motion in weaving process, be linked to driving member 23 in the mode extended to the 2nd connecting portion 23d from the 1st connecting portion 23c in driving member 23.Therefore, connecting rod 31a has as shown in the figure in trapezoidal curved shape at the domain of the existence of driving member 23, to get around driving shaft 13, crank boss 21 etc. that the mode of giving prominence to from the through hole 23b of driving member 23 exists.And connecting rod 31a abuts the end face outside (bearing surface) of the 2nd connecting portion 23d in driving member 23 and has the shape extended to the vertical direction with driving shaft 13 axis from this abutted position.

Further, connecting rod 31a, on the position that the 2nd connecting portion 23d with driving member 23 abuts against, has the fastener 31a1 larger than the size of other parts on width (direction vertical with bearing of trend).Further, the both sides place at this fastener 31a1 center is in the direction of the width formed with through hole.On the other hand, correspondingly with the fastener 31a1 of connecting rod 31a on the 2nd connecting portion 23d of driving member 23 2 internal thread holes are formed.And the screw element 26,26 inserted outside the through hole of the fastener 31a1 connecting rod 31a is screwed into the internal thread hole formed in the 2nd connecting portion 23d in driving member 23, thus makes connecting rod 31a be fixed on driving member 23 at this abutted position place.Therefore, although connecting rod 31 in its back-end place of portion is linked with the 1st connecting portion 23c of driving member 23 rotationally by connecting pin (connection shaft) 25, but under woven state, at the abutted position place of the 2nd connecting portion 23d with driving member 23, then fixing (locking), on the 2nd connecting portion 23d, is integrated with driving member 23 one-tenth with the state of the rotation preventing connecting pin 25 place.

According to the structure of above-mentioned easing mechanism E1, crank boss 21 as actuator rotates along with the rotation of driving shaft 13, thus the axle portion 22b relative drive shaft 13 of support 22 that supports by crank boss 21 carry out eccentric rotational motion, to make its axle center 22b1 by centered by the axle center 13a of driving shaft 13 and in the circumferentially rotation being radius with the offset of the axle center 22b1 of axle portion 22b.Simultaneously, the driving member 23 on the axle portion 22b of support 22 is supported in and the connecting rod 31a of loose warp bar 31 that is fixed on driving member 23 carries out with the eccentric motion of the rotation centered by the axle center 13a of driving shaft 13 by bearing 24, by the displacement on the fore-and-aft direction with the generation of this eccentric motion, loose warp bar 31 is driven reciprocally in the longitudinal direction.So the loose warp arm 32 linked with loose warp bar 31 carries out oscillating traverse motion centered by the axle center of the 2nd back shaft 9, by the reciprocating rotation of the 2nd back shaft 9 with this oscillating traverse motion generation, carry out the easing motion of loose warp roller 1.

Further, in the structure of the present embodiment, the state consistent with the bearing of trend of loose warp bar 31 of the described eccentric direction in eccentric drive mechanism 20 is the swing limit (stop of easing mechanism E1) of loose warp arm 32 oscillating traverse motion.And loose warp arm 32 is driven by reciprocally swinging with the oscillating quantity corresponding to the described offset in eccentric drive mechanism 20, oscillating quantity when loose warp roller 1 carries out easing motion is corresponding with the oscillating quantity of this loose warp arm 32.Wherein, when weaving for relaxing, the easing motion of the loom loose warp roller 1 of the tension change of warp thread T is in one cycle generally the oscillating motion in the angular range of 2 to 3 °, and maximum is also be less than the oscillating motion in the angular range of 10 °.So the eccentric drive mechanism in existing easing mechanism consists of the described offset achieved by easing motion that only can be set in this degree angular range.

Moreover, as mentioned above, two kinds of described offsets in the eccentric drive mechanism 20 of the present embodiment, can be set, but in weaving process, be only set as one of them and carry out the driving of loose warp roller 1.Therefore, this can select the two kinds of offsets set all to be equivalent to the 1st offset described in the present invention.And, in the structure of the present embodiment, under state shown in state when weaving and Fig. 4 etc., by carrying out eccentric rotational motion as the axle portion 22b relative drive shaft 13 rotating shaft support 22, thus loose warp bar 31 is driven reciprocally in the longitudinal direction, the axle portion 22b of this state lower carriage 22b is equivalent to the eccentric shaft in the present invention.In addition, under the state shown in above-mentioned Fig. 4 etc., the connecting rod 31a of loose warp bar 31 is integrated with driving member 23 one-tenth, links by driving member 23 and as the axle portion 22b of eccentric shaft support 22.So this state lower transmission component 23 plays a role as a part for loose warp bar 31, and driving member 23 is the linking part in the present invention.

And, as based on structure of the present invention, eccentric drive mechanism 20 in easing mechanism E1 discussed above is configured to, while being set to the axle center 13a bias of relative drive shaft 13, make loose warp roller 1 carry out the action corresponding to this offset eccentric shaft can when weaving and when loose warp roller 1 keeps out of the way between switch.In more detail as mentioned below.

As mentioned above, the loose warp bar 31 in linkage 30 engages (fixing) at the fastener 31a1 place of the connecting rod 31a being positioned at wherein centre place on driving member 23 by screw element 26.In other words, loose warp bar 31 (connecting rod 31a) has by removing the locking of screw element 26 thus the structure can rotated relative to driving member 23 at connecting pin 25 place.

And, in eccentric drive mechanism 20, the pedestal 23a of driving member 23 is formed and forms opening and 2 internal thread holes 23e, the 23e that can be screwed into for screw element 26 in the end face outside of pedestal 23a, its be positioned at through hole 23b both sides and in the position different with the 1st and the 2nd connecting portion 23c, 23d.In addition, support 22 is formed breach 22f, 22f, thus when support 22 described eccentric direction be in by fastener 31a1 be fixed on the bearing of trend of the connecting rod 31a of the state on driving member 23 consistent internal thread hole 23e, 23e of driving member 23 are exposed laterally.

Further, screw element 26 is step bolt, its have as operating portion head, from head extend not being formed with externally threaded axle portion and being formed with externally threaded external thread part than axle portion closer to front.And, each breach 22f in support 22 the axle portion of double thread part 26 can not produce interference when screw element 26 is screwed into each internal thread hole 23e of driving member 23, and under the state being screwed into internal thread hole 23e at screw element 26 support 22 of the axle portion of screw element 26 and the position of breach 22f side between the gap that formed very little.Further, disturbing to not produce with the head of screw element 26, in crank boss 21, being formed with breach 21f, 21f.

According to the structure of this eccentric drive mechanism 20, in driving member 23, to pull down from the 2nd connecting portion 23d by will the 2nd connecting portion 23d be screwed into and link the connecting rod 31a of loose warp bar 31 and the screw element 26 of driving member 23 and be screwed into internal thread hole 23e, make the periphery in the axle portion of screw element 26 be in the state relative with the side of the position of the breach 22f of support 22, the relative rotation of support 22 and driving member 23 is due to abutting and being in the state of being prevented between the periphery in the axle portion of screw element 26 and the above-mentioned side of support 22.In addition, the crank boss 21 that support 22 is fixed on driving shaft 13 fixes.So the state lower transmission component 23 being screwed into internal thread hole 23e at screw element 26 is in the non-rotatable state of relative drive shaft 13.

In above structure, loose warp roller 1 carries out in the following manner to the movement of retreating position.

First, using the anglec of rotation of the main shaft of loom under state (shown in Fig. 4 state) consistent with the bearing of trend of loose warp bar 31 for the described eccentric direction in the eccentric drive mechanism 20 being in easing mechanism E1 as loom halted state.And, under halted state, by the 2nd connecting portion 23d of screw element 26,26 from driving member 23 is pulled down and is screwed into respectively internal thread hole 23e, 23e, thus make loose warp bar 31 the connecting pin 25 as connection shaft being fixed on self everywhere while the rotating state of relative driving member 23 (eccentric drive mechanism 20) driving member 23, crank boss 21 and support 22 be all in the non-rotatable state of relative drive shaft 13.

And, in this condition, running loom by crawl drives main shaft to rotate to make driving shaft 13 carry out 180 ° of rotations, rotary driving member 23 with the driving shaft 13, crank boss 21 and the support 22 that are rotarily driven by this also and then rotates, 180 ° of revolution are carried out in axle center around driving shaft 13 by the connecting pin 25 at the eccentric position place of the axle center 13a of relative drive shaft 13 with axle center 25a, thus form state as shown in Figure 6.So, as shown in Figure 7, the axle center 13a of connecting pin 25 relative drive shaft 13 moves to the position of displacement forward from the axle center 13a of driving shaft 13 with the offset d2 of Pivot Point Center 25a, its result, with the above-mentioned rotation of driving shaft 13, connecting pin 25 is in the state of 2 times of distances of the forwards displacement d2 from the position before above-mentioned rotation.Therefore, make loose warp bar 31 forwards move above-mentioned distance, loose warp arm 32 swings with the oscillating quantity corresponding to this amount of movement, thus makes loose warp roller 1 significantly swing and retreat to retreating position.

In addition, as mentioned above loose warp roller 1 is being kept out of the way (movement) in the operation of retreating position, connecting pin 25 as turning cylinder plays a role as the eccentric shaft in the present invention, and the rearward end that intercalation is fixed with the loose warp bar 31 (connecting rod 31a) of connecting pin 25 is then equivalent to the linking part in the present invention.Further, the offset d2 of the axle center 13a of the axle center 25a relative drive shaft 13 of connecting pin 25 is as the 2nd offset in the present invention.And in the present embodiment, screw element 26 is as the fastener of the relative rotation prevented between driving member 23 and axle portion 22b (turning cylinder) of support 22.

Wherein, d1 in Fig. 7 is the offset of the axle center 13a of the axle center 22b1 relative drive shaft 13 of support 22 middle shaft part 22b, it is the basis of easing motion when weaving, in illustrative example, the offset d2 as the basis of the swing for loose warp roller 1 being retreated to retreating position is 16 times of offset d1.But the position of the axle center 13a of this offset d2 and connection shaft (connecting pin 25) relative drive shaft 13 is set to, loose warp roller 1 can be made to swing displacement upward with the position making the lower end of loose warp roller 1 be positioned at the upper end more top than warp shaft WB.And, in illustrative example, compare the oscillating quantity of easing motion when weaving as mentioned above only in the angular range of 2 to 3 °, and when keeping out of the way, the oscillating quantity of loose warp roller 1 exceedes 45 ° (being about 48 ° in shown position) as shown in Figure 6.

Thus, according to the Withdraw and keep-off device of the loose warp roller 1 based on the present embodiment structure, the driving of positive easing mechanism can be utilized to make loose warp roller 1 move to retreating position when keeping the connecting state of linkage 30, even if therefore in order to reduce weave time Warp line desired location and reduce the height and position of loose warp roller 1 time, also easily implement the replacing operation of warp shaft WB.

Further, while utilizing 2 screw elements 26,26 to be locked on driving member 23 by loose warp bar 31, this screw element 26,26 also can be used as fastener use.Thus, make the screw element 26 played a role as fastener have purposes when weaving simultaneously, reach without the need to the management how storing of transaction card component and effect of the problem such as anti-lost in the weaving process not using fastener.And as the present embodiment, by utilizing 2 screw elements 26,26, by loose warp bar 31, the structure be locked on driving member 23 not only can play dual-purpose effect as described, also can maintain the easy implementation of operation when loose warp roller 1 is kept out of the way.Be specially as described below.

When screw element 26 is dual-purpose as described, the screw element 26 being screwed into driving member 23 (the 2nd connecting portion 23d), when using as fastener, must be pulled down from driving member 23 to loose warp bar 31 is locked to driving member 23 by this screw element 26.If only use 1 screw element 26, after then loose warp bar 31 is removed by the locking of this screw element 26, in easing mechanism E1, driving member 23 to keep under opposite brackets 22 (axle portion 22b) rotatable state loose warp bar 31 at connecting pin 25 everywhere in the rotating state of relative driving member 23.

On the other hand, in the linkage 30 of easing mechanism E1, due to the effect of loose warp roller 1 self gravitation, the loose warp arm 32 in Fig. 1 state is applied to the power that loose warp arm 32 is rotated clockwise as shown in Figure 1, make it be in be eccentrically driven the state that mechanism 20 supports.But, as implied above under the rotatable state of driving member 23 once remove the locking of loose warp bar 31 centre, power in the rotation direction that loose warp roller 1 self gravitation causes will be acted on driving member 23 by linkage 30, thus state when driving member 23 may be caused to stop from loom is rotated.Due in this case, will dislocation be produced between the position of the internal thread hole 23e formed in the position of the breach 22f formed in support 22 and driving member 23, cause screw element 26 cannot insert in the internal thread hole 23e of driving member 23.Therefore, as there is above-mentioned rotation in driving member 23, then driving member 23 must be rotated back into original position, this operation means and driving member 23 will be rotated towards the direction contrary with loose warp roller 1 self gravitation, therefore needs very large muscle power.

To this, according to the structure of the present embodiment, owing to employing 2 screw elements 26,26, loose warp bar 31 is locked on driving member 23, even if therefore pull down 1 screw element 26 from driving member 23, also can not removes the locking of the relative driving member 23 of loose warp bar 31.Therefore, by the screw element pulled down 26 is screwed in the internal thread hole 23e of driving member 23, driving member 23 is made to be in the non-rotatable state of opposite brackets 22, even if therefore pull down another 1 screw element 26 from driving member 23 in this condition and remove the locking of the relative driving member 23 of loose warp bar 31, driving member 23 also can not be caused as described to rotate because of the self gravitation of loose warp roller 1.So, aiming at operation without the need to carrying out between the breach 22f of described the support 22 and internal thread hole 23e of driving member 23, making move to the state of retreating position for making loose warp roller 1 be in and become easy to the operation that easing mechanism E1 carries out.

But, when being used as the special-purpose member of fastener, can only use 1 for loose warp bar 31 being locked to the parts (screw element 26) of driving member 23.Further, in this case, be not limited to as set forth in the present embodiment be provided with 2 fasteners, also can establish 1 fastener.

And, in the present embodiment, breach 22f is formed in support 22, and make the side of the support 22 of breach 22f position abut the axle portion periphery of the screw element 26 of most step bolt, in this, as the structure of the relative rotation prevented by fastener between driving member 23 with support 22 (axle portion 22b), but, replace, such as, also can form through hole in support 22, form the structure be screwed into by this through hole by screw element 26 in the internal thread hole 23e of driving member 23.In this case, the inner peripheral surface by the axle portion of screw element 26 being connected to above-mentioned through hole prevents the relative rotation between driving member 23 with support 22.Further, when being used as the special-purpose member of fastener, such as, fastener also can be formed as the hook shaped component with reverse U shape shape, and while one end is intercalated in driving member 23, the other end is intercalated in support 22.

Further, in the structure as shown in the figure of the present embodiment, the breach 22f formed in support 22 in the peripheral direction of support 22 than the shaft portion diameter of screw element 26 formed greater.This be due to: when white weaving state makes loom stop, the anglec of rotation (stop angle) of main shaft is if total energy be the predetermined anglec of rotation; when the described eccentric direction namely in eccentric drive mechanism 20 and the on all four anglec of rotation of the bearing of trend of loose warp bar 31, then it doesn't matter; but in fact the stop angle of the main shaft of loom is not always invariable, can produce the situation that a little bias appears in the relatively above-mentioned predetermined anglec of rotation when sometimes shutting down.Therefore, increase the forming range of the breach 22f of support 22 as described above, thus the deviation of the stop angle of above-mentioned main shaft can be tackled.

So as mentioned above, even if form the through hole inserted for screw element 26 on support 22, this through hole is also preferably the circumferentially longer elongated hole centered by the axle center 13a of driving shaft 13.Wherein, in schematic structure, be formed with breach 22f, with the anglec of rotation deviation making the relatively above-mentioned predetermined anglec of rotation admit of 3 °, front and back.But, if by loom stopping control make main shaft stop at constant stop angle when, also the breach 22f that support 22 is formed and described through hole can be set on the axle portion outer peripheral face with screw element 26 roughly consistent.

Further, loose warp roller 1 plays a role as tension-sensing roller in the present embodiment, but the present invention is not limited thereto, and can be also the tension detect utilizing the parts such as other rollers to carry out warp thread T, and loose warp roller 1 is only for carrying out easing motion.And, in the present embodiment, easing mechanism E1 is located at the both sides (being located at the loom frame F of the left and right sides respectively) of loom and is linked to the both ends of the 2nd back shaft 9 respectively, and form loose warp roller 1 and driven by the both sides driven energetically at both ends, but, replacing, also can be the one-sided driving that easing mechanism E1 is only linked to one end of the 2nd back shaft 9.

In the above-described embodiments, about the Withdraw and keep-off device of loose warp roller in loom according to the present invention, set forth and adopted crank-type positive easing mechanism as the embodiment of easing mechanism, but loose warp roller Withdraw and keep-off device according to the present invention also can be the embodiment based on following embodiment (variation).

(1), when adopting crank-type positive easing mechanism as easing mechanism in loose warp roller Withdraw and keep-off device according to the present invention, in addition to the embodiment illustrated, the easing mechanism E2 of the structure had as shown in Figure 8,9 can also be adopted.In addition, because the linkage 30 in this easing mechanism E2 is substantially identical with the structure of described embodiment, in Fig. 8,9, the symbol identical with described embodiment is therefore utilized to indicate this identical structure and save in detailed description hereafter.And this easing mechanism E2 has the eccentric drive mechanism 40 different from described embodiment as drive unit.

This eccentric drive mechanism 40 comprises: crank disk 41, and it can not be supported on driving shaft 13 with the relative rotation as actuator; Eccentric shaft 43, its by crank disk 41 support and be arranged on the position of the axle center 13a bias making axle center 43a relative drive shaft 13; Position adjusting mechanism 45, it is set as opposing cranks disk 41 and can not relatively rotates, and is adjusting the radial direction of crank disk 41 (hereinafter referred to as " radial direction " for eccentric shaft 43 while supporting eccentric shaft 43.) on position.So eccentric shaft 43 is supported on crank disk 41 by position adjusting mechanism 45.And the loose warp bar 31 linking part place in its back-end of linkage 30 can be linked on this eccentric shaft 43 with the relative rotation by parts of bearings such as bearing metals.Wherein, driving shaft 13 spindle synchronous with loom same with described embodiment, often rotates the 1 circle ratio that also and then rotation 1 is enclosed with main shaft and is driven, so crank disk 41 also often rotates the 1 circle ratio that also and then rotation 1 is enclosed with main shaft and is driven in rotation.

Position adjusting mechanism 45 comprises and extends in the radial direction and be supported in the ball-screw 45a of crank disk 41 and support the driven nut 45b of eccentric shaft 45a.In more detail, ball-screw 45a, by being fixed on a pair bracket 45c, 45c of crank disk 41 front (end face of anti-driving shaft 13 side), is supported in the mode near the outer peripheral edge extending to crank disk 41 near this center and across crank disk center.And, ball-screw 45a is with while being supported in the rotatable state of 45a1,5a1 place of axle portion opposing brackets 45c, 45c at two ends, the axle portion 45a1 of the side, outer peripheral edge of crank disk 41 gives prominence to from bracket 45c, carries out rotation process by the operation tool (diagram slightly) being linked to this ledge.Further, the axle portion 45a1 of ball-screw 45a engages by not shown stopper, makes ball-screw 45a be in the non-rotatable state of opposing brackets 45c by this locking.

Further, driven nut 45b is formed with the internal thread screwed togather with ball-screw 45a while having cuboid main body and the through hole 45b2 to run through along its length on this through hole 45b2 inner peripheral surface.In addition, on a side of 2 sides of driven nut 45b in 4 sides paralleled with the axis of through hole 45b2, have to give prominence to from the side of this side and formed and there is than this side the prerotation vane 45b1 of less width dimensions.On the other hand, crank disk 41 also can make the chimeric gathering sill 41a wherein of the prerotation vane 45b1 of driven nut 45b observing from front to be formed with the same position of ball-screw 45a to extend along radial direction.And driven nut 45b is set to, by ball-screw 45a being screwed into through hole 45b2 while being supported by ball-screw 45a, under the state being supported in this ball-screw 45a, prerotation vane 45a1 embeds in the gathering sill 41a of crank disk 41.So, can move on the length direction of gathering sill 41a (bearing of trend for radial direction and ball-screw 45a) while that driven nut 45b being non-rotatable by engaging opposing cranks disk 41 between prerotation vane 45b1 with gathering sill 41a.

According to the structure of this eccentric drive mechanism 40, by swing roller leading screw 45a, driven nut 45b is moved on ball-screw 45a along radial direction.So, the eccentric shaft 43 that supports by driven nut 45b to be changed position on its radial direction on crank disk 41 by swing roller leading screw 45a, thus change the offset of the axle center 13a of the axle center 43a relative drive shaft 13 of eccentric shaft 43.

In schematic structure, ball-screw 45a extends towards crank disk 41 center (the 13a position, axle center of driving shaft 13) near the outer peripheral edge of crank disk 41, extends to the position exceeding this center.So the position being positioned at the driven nut 45b of crank disk 41 central side can be set as that the axle center 43a of eccentric shaft 43 is in the radial direction near the position of the axle center 13a of driving shaft 13.

And, in weaving process, as shown in solid line in Fig. 8 (c), the position of driven nut 45b is set to the axle center 43a of eccentric shaft 43 in the radial direction near the position (offset d3) of the axle center 13a of driving shaft 13, carries out the easing motion of loose warp roller 1 in Fig. 9 (a) in the scope represented by solid line and double dot dash line.Wherein, offset d3 is now equivalent to the 1st offset of the present invention.But, in eccentric drive mechanism 40, the position of the driven nut 45b on ball-screw 45a, namely on radial direction, the position (=offset) of the axle center 13a of the axle center 43a relative drive shaft 13 of eccentric shaft 43 can adjust arbitrarily in the existence range of ball-screw 45a.So, in weaving process, the position of driven nut 45b (eccentric shaft 43) may correspond to weaving condition etc. and sets arbitrarily, but mention in embodiment as depicted, the oscillating quantity of the loose warp roller 1 caused due to easing motion in weaving process is very little, and the position of the driven nut 45b (eccentric shaft 43) that therefore can set for easing motion is set all the time in the radial direction in the scope of the axle center 13a of driving shaft 13.Further, the offset of the axle center 13a of the axle center 43a relative drive shaft 13 of the scope inner eccentric shaft 43 of the position of the axle center 43a of the eccentric shaft 43 that can set for this easing motion is all the 1st offset.

In addition, in easing mechanism E2, the position changeable of the driven nut 45b (eccentric shaft 43) on ball-screw 45a more extremely exceeds the position of the scope that can set for easing motion when weaving, and the maximum (maximum amount of change) of this amount of change is set as making loose warp roller 1 to retreat to retreating position.Wherein, this maximum amount of change is positioned at the position of the upper end more top than warp shaft WB based on the lower end that the position of loose warp roller 1 when weaving and the upper end position relationship in the vertical direction of warp shaft WB are set to loose warp roller 1 to be moved to loose warp roller 1, and the diameter of crank disk 41 and the length of ball-screw 45a meet can realize this maximum amount of change.

And when loose warp roller 1 is kept out of the way, driven nut 45b is moved to the position (dotted line position of Fig. 8 (c)) of the maximum amount of change exceeding the scope that can set for easing motion by swing roller leading screw 45a.Thus the offset d4 of the axle center 13a of the axle center 43a relative drive shaft 13 of eccentric shaft 43 is more much larger than the 1st offset d3 for easing motion.Such as illustrative example, the size of offset d4 exceedes 10 times of offset d3, and this is equivalent to the 2nd offset described in the present invention.And, in this condition, run loom by crawl and driving shaft 13 rotated the phase place place being in maximum propelling position to the stop place of easing mechanism E2 and loose warp roller 1, make loose warp roller 1 move to retreating position as shown in solid line in Fig. 9 (b).Wherein, state shown in double dot dash line is carry out state when loose warp roller 1 in easing motion process is in maximum going-back position when weaving in Fig. 9 (b).

In addition, guiding mechanism as the offset in the axle center of the axle center relative drive shaft of the eccentric shaft in crank-type positive easing mechanism is not limited to above structure, such as, can also disclosed in 7-133545 publication as flat in Japanese Patent Laid-Open, in crank disk, form spiral groove, and can along the structure of the position of this groove adjustment eccentric shaft.But in this example embodiment, the spiral groove formed in crank disk is also formed as the position being used for the adjusting range of the eccentric shaft of easing motion when the position of eccentric shaft can be set as exceeding and weave.

(2) above-mentioned example adopts crank-type positive easing mechanism as the easing mechanism in the Withdraw and keep-off device of loose warp roller of the present invention, but the present invention is not limited thereto, and such as, easing mechanism can also be the actuated by cams formula positive easing mechanism as shown in Figure 10,11.

Shown in Figure 10,11 is the easing mechanism E3 as drive unit with cam drive mechanism 50.And the linkage 30 in this easing mechanism E3 also has substantially identical structure with described embodiment, in Figure 10,11, the symbol identical with described embodiment is therefore utilized to indicate this identical structure and save in detailed description hereafter.

Cam drive mechanism 50 in this easing mechanism E3 comprises the cam 51 by driving shaft 13 rotary actuation, and the cam lever 52 be connected with the loose warp bar 31 of linkage 30 while being connected on cam 51 by cam ball (cam follower) 52d.Wherein, driving shaft 13 is identical with described embodiment, the spindle synchronous of itself and loom, often rotates the 1 circle ratio that also and then rotation 1 is enclosed be driven in rotation with main shaft, and therefore, crank disk 41 also often rotates the 1 circle ratio that also and then rotation 1 is enclosed with main shaft and is driven in rotation.

Cam lever 52 has the boss portion 52a by the relative rotatable support of loom frame F of back shaft 54, and 2 bar portions 52b, 52c that the mode extended to boss portion 52a both sides and boss portion 52a are integrally formed.Bar portion 52b in these 2 bar portions 52b, 52c is formed as extending downward from boss portion 52a in illustrative example, its leading section (end of anti-boss portion 52a side) is while being fixed with axle 52b1, and cam ball 52d is relative, and axle 52b1 is rotatably supported.Wherein, cam lever 52 is configured to, the cam ball 52d supported by bar portion 52b aligns with cam 51 on woven pieces direction, and abuts state to cam 51 lateral deviation pressure with what keep cam ball 52d and cam 51 by the biasing devices such as spring (diagram slightly) in bar portion 52b.

Further, the bar portion 52c of cam lever 52 is formed as extending upward from boss portion 52a.Wherein, under bar portion 52c is formed as the state (cam ball 52d is connected to the state during lower dead center of cam 51) being in maximum going-back position at loose warp roller 1, extend along the circular arc centered by the connection shaft linking loose warp bar 31 and loose warp arm 32.And, this bar portion 52c is provided with the connecting piece 53 linked with the rearward end of loose warp bar 31.

This connecting piece 53 has: be arranged on the main part 53a on the bar portion 52c of cam lever 52, and the axle portion 53b linked with loose warp bar 31 while being set to give prominence to from main part 53a.In more detail, main part 53a for approximate cuboid has can the through hole 53a1 of bar portion 52c of intercalation cam lever 52, setting-in bar portion 52c in this through hole 53a1, and from the side locking bolt 53c being screwed in the internal thread hole be communicated with through hole 53a1, thus position on fixed bar portion 52c being installed on cam lever 52.And the two sides be arranged on width (axis direction of the back shaft 54 of cam lever 52) at this main part 53a are provided with axle portion 53b away from the side 53a2 of cam 51 side in the mode outstanding towards above-mentioned width.

And, main part 53a have than through hole 53a1 while the larger width dimensions of boss portion 52a be formed in the side of 53a2 opposition side, side near, to make to be in boss portion 52a than cam lever 52 further from the position (outside) of cam 51 at the side 53a2 being in the state being installed in cam lever 52 and being arranged with axle portion 53b.So main part 53a, under the state being installed in cam lever 52, observes from front and gives prominence to more laterally than the boss portion 52a of cam lever 52.In addition, main part 53a forms arc-shaped otch in the part that its lower surface is relative with the boss portion 52a of cam lever 52 along boss portion 52a outer peripheral face, and has in the outboard end comprising side 53a2 towards the outstanding protuberance in the 54a side, axle center of back shaft 54.So according to the structure of this main part 53a, the axle portion 53b be located on the 53a2 of side can be arranged at the position of the axle center 54a of the back shaft 54 making its axle center 53b1 near cam lever 52.

Further, the axle portion 53b of connecting piece 53 is non-rotatably fixed on main part 53a, and loose warp bar 31 linking part in its back-end can be linked to this axle portion 53b with the relative rotation by parts of bearings such as bearing metals.Further, connecting piece 53 is fixed on bar portion 52c, is on the eccentric position (offset d5) of the axle center 54a of relative support axle 54 on the bar portion 52c of cam lever 52 to make the axle center 53b1 of axle portion 53b.

According to the easing mechanism E3 comprising this structure cam drive mechanism 50, when being driven rotating cam 51 by driving shaft 13, the cam lever 52 being connected to cam 51 by cam ball 52d bar portion 52b is driven by reciprocally swinging centered by the axle center 54a of back shaft 54.So the cam lever 52 in this embodiment is equivalent to the actuator being driven rotation in the present invention by driving shaft 13.But, in the case of this embodiment, the rotary actuation of the actuator (cam lever 52) driven by driving shaft 13 not as described in the unidirectional continuous rotation of embodiment etc. but reciprocating rotary (rotations) driving.In addition, the eccentric shaft that the axle portion 53b of connecting piece 53 that in this embodiment, this cam lever 52 (actuator) supports and the axle center 54a of the back shaft 54 of relative support cam lever 52 makes the axle portion 53b of axle center 53b1 eccentric setting be equivalent in the present invention.

And, with the oscillating traverse motion of described cam lever 52, the reciprocating motion that the axle center 54a being arranged on relative support axle 54 makes the axle portion 53b of the connecting piece 53 on the position of axle center 53b1 bias carry out on fore-and-aft direction with the amount corresponding to its offset, 31, the loose warp bar being linked to axle portion 53b is driven reciprocally at fore-and-aft direction.Its result, makes loose warp roller 1 swing with the oscillating quantity corresponding to above-mentioned offset.

And, as shown in Figure 10, when weaving cam lever 52 arm 52c on the position of connecting piece 53 be set to the position of the boss portion 52a near cam lever 52, the offset of the axle center 54a of the axle center 53b1 relative support axle 54 of the axle portion 53b on connecting piece 53 is set to the comparatively small eccentricity amount d5 as shown in Figure 10 (b).So the loose warp roller 1 in weaving process carries out easing motion with the oscillating quantity corresponding to above-mentioned offset d5.And offset d5 is now equivalent to the 1st offset in the present invention.Wherein, represent that loose warp roller 1 is positioned at the state (cam ball 52d is connected to state during cam 51 lower dead center) retreating the limit with solid line in Figure 10 (a), represent that loose warp roller 1 is positioned at the state (cam ball 52d is connected to state during cam 51 top dead centre) of the advance limit with double dot dash line.

And, in schematic structure, the arm 52c of cam lever 52 is formed as extending to make the described offset of the axle center 53b1 of the axle portion 53b of connecting piece 53 can be set as exceeding in weaving process for the offset that easing motion can set upward, under the state being positioned at the front of arm 52c at connecting piece 53, the described offset d6 (Figure 11 (b)) of the axle center 53b1 of the axle portion 53b of connecting piece 53 than described in weave time large many of offset d5, in illustrative example, its size is more than 6 times.

Therefore, when loose warp roller 1 is kept out of the way, first unclamp the locking bolt 53c be fixed on by cam lever 52 on connecting piece 53 position, connecting piece 53 can be moved on arm 52c and connecting piece 53 is moved to the front of arm 52c, be again fixed near the front end of arm 52c by locking bolt 53c.Thus as shown in Figure 10 (b), the axle center 53b1 of the axle portion 53b in connecting piece 53 is in comparatively large eccentricity state with the offset d6 of the axle center 54a of relative support axle 54.And offset d6 is now equivalent to the 2nd offset in the present invention.Further, the movement of above-mentioned connecting piece 53 carries out under loose warp roller 1 is positioned at the state retreating the limit.

And in this condition, run loom by crawl and drive main shaft to carry out 180 ° of rotations to make driving shaft 13, the rotation of the cam 51 driven by this rotation makes cam lever 52 forwards swing.Now, the axle portion 53b of connecting piece 53 is eccentric with described comparatively large eccentricity amount d6 relative support axle 54, the therefore distance of the circular arc of the radius that axle portion 53b forwards displacement 1 is suitable with offset d6.So the loose warp arm 32 be connected by loose warp bar 31 and the axle portion 53b of connecting piece 53 will significantly be swung, and 1, loose warp roller is moved into the retreating position shown in solid line as middle in Figure 11 (a).Wherein, the state shown in double dot dash line is state when loose warp roller 1 is in maximum going-back position when carrying out easing motion in weaving process in Figure 11 (a).

In addition, in the embodiment be described utilizing Fig. 8 to 11, share eccentric shaft when weaving and when loose warp roller 1 keeps out of the way, by this share the eccentric position of eccentric shaft when weaving (axle center is with the eccentric position in the axle center of the 1st offset relative support axle (driving shaft)) and loose warp roller 1 is kept out of the way time eccentric position (axle center is with the eccentric position in the axle center of the 2nd offset relative support axle (driving shaft)) between switch.But when these structures, the actuator supporting eccentric shaft is necessary for the large-size components that can arrange these 2 kinds of eccentric positions, although the defect also having plant bulk to become large can be realized simultaneously.On the other hand, when the above embodiments, position switching can be carried out to eccentric shaft when weaving and when loose warp roller 1 keeps out of the way as mentioned above, therefore there is the advantage that can make equipment miniaturization.

And, in the above example, driving shaft 13 and the main shaft of loom link thus by the main shaft rotary actuation of loom, namely using the main shaft of loom as drive source, but the present invention is not limited thereto, driving shaft 13 can also be using the device of the main shaft of relative loom (former dynamic motor) the independently spindle synchronous rotary actuation of special CD-ROM drive motor as drive source and by this special CD-ROM drive motor and loom.

(3) in above-described embodiment, be the example of positive easing mechanism according to the easing mechanism in loose warp roller Withdraw and keep-off device of the present invention, but the present invention is not limited thereto, the passive easing mechanism that the biasing force also utilizing spring etc. to produce by not having drive unit absorbs the tension change of warp thread T when weaving realizes.

Be a wherein example shown in Figure 12, namely utilize the example of passive easing mechanism E4 as the easing mechanism in the present invention of the tension change of warp thread T when being weaved by loose warp spring 37 absorption.In this easing mechanism E4, between loose warp arm 32 and loose warp bar 35, clamp the loose warp spring 37 as stage clip, acted on the tension change of warp thread T when biasing force on loose warp arm 32 is weaved the simultaneously stability that warp thread T applies tension force by this loose warp spring 37.Further, in passive easing mechanism E4, loose warp bar 35 is being supported on loom frame by installing the parts of bearings such as spherical bearing on its end with the be connected end (rearward end) of opposition side of side of loose warp arm 32.

And, in schematic structure structure loose warp bar 35 physical length (Support Position of loom frame to loose warp arm 32 coupling position between length dimension) can change.Specifically, loose warp bar 35 comprises the 1st rod member 35a linked with loose warp arm 32 and the 2nd rod member 35b2 parts supported by loom frame, and the 1st and the 2nd rod member 35a, 35b is linked by bar length regulating device 60.

This bar length regulating device 60 has: the 1st connecting piece 61, and it is non-rotatably fixed in the rearward end of the 1st rod member 35a; 2nd connecting piece 62, its end (leading section) being non-rotatably fixed on loose warp arm 32 side of the 2nd rod member 35b is gone up and has same phase for loose warp bar 35 and the 1st connecting piece 61; And ball-screw 63, it links the 1st connecting piece 61 and the 2nd connecting piece 62.This ball-screw 63 the 63a place of axle portion being formed at leading section support by the 1st connecting piece 61 while at the 63b place of axle portion being formed at rearward end support by support member 64.This support member 64 is set to, and in through hole 64a, intercalation has the 2nd rod member 35b, and can slide along the axis direction of the 2nd rod member 35b.And, ball-screw 63 be supported for respectively at 63a, 63b place of axle portion at two ends relative to the 1st connecting piece 61 and support member 64 rotatable and can not move in the axial direction.

Further, the position of reporting to the leadship after accomplishing a task of the ball-screw 63 that the 2nd connecting piece 62 and the 1st connecting piece 61 support has through hole 62a, the inner peripheral surface of this through hole 62a is formed can with the internal thread of external thread spiro fastening that formed on ball-screw 63.And the 2nd connecting piece 62 is screwed together on ball-screw 63 by through hole 62a between the 1st connecting piece 61 and support member 64.

Therefore, according to these structures in bar length regulating device 60, the position of the 2nd connecting piece 62 on ball-screw 63 is changed by swing roller leading screw 63, thus the distance of (between the 1st rod member 35a and the 2nd rod member 35b) between the 1st connecting piece 61 and the 2nd connecting piece 62 on the axis direction changing loose warp bar 31, its result changes the physical length of loose warp bar 35.Wherein, the rotation of ball-screw 63 is undertaken by linking the components such as operation tool (diagram slightly) in the part outstanding from the support member 64 on the axle portion 63b of ball-screw 63.

Therefore, based on the Withdraw and keep-off device of the loose warp roller 1 of the present invention of this passive easing mechanism E4 when weaving, the opposed end that the position of the 2nd connecting piece 62 on ball-screw 63 is set to the 1st rod member 35a and the 2nd rod member 35b close to but discontiguous state time position.Further, when loose warp roller 1 is kept out of the way, towards the direction swing roller leading screw 63 that the distance made between the 1st connecting piece 61 and the 2nd connecting piece 62 increases.But, the 2nd rod member 35b being fixed with the 2nd connecting piece 62 at rearward end place to support by loom frame and position is fixed, therefore the position of the 2nd connecting piece 62 does not change on the axis direction of loose warp bar 35.So, with the described rotation of ball-screw 63, the 1st connecting piece 61 on the axis direction of loose warp bar 35 towards the direction displacement away from the 2nd connecting piece 62.Its result, is fixed with the 1st rod member 35a of the 1st connecting piece 61 towards loose warp arm 32 side displacement, thus makes loose warp arm 32 carry out swinging and loose warp roller 1 position displacement upward.

And, with the described rotation of ball-screw 63, support member 64 on the 2nd rod member 35b towards the 2nd connecting piece 62 Slideslip, the described rotation of described ball-screw 63, that is, on loose warp arm 35 axis direction, relative 2nd connecting piece 62 (the 2nd rod member 35b) of the 1st connecting piece 61 (the 1st rod member 35a) is movable is connected to the 2nd connecting piece 62 to support member 64.And, this displacement sets according to the distance (length dimension of ball-screw 63) when weaving between the 2nd connecting piece 62 and support member 64, and the loose warp arm 32 that this distance is set to cause because of the displacement with the 1st rod member 35a swings and makes loose warp roller 1 retreat to retreating position.So rotate by making ball-screw 63 until support member 64 is connected to the 2nd connecting piece 62, loose warp roller 1 moves to retreating position.

Wherein, this passive easing mechanism E4 role is applicable to positive easing mechanism E2 as shown in Figure 8.In the explanation of above-mentioned positive easing mechanism E2, be behind the position of the 2nd offset by the position displacement of driven nut 45b to the bias of the axle center 13a of the axle center relative drive shaft 13 of eccentric shaft 43, rotating driveshaft 13 moves to retreating position to make loose warp roller 1, but replace, also can be: first, under loom halted state, by main shaft (driving shaft 13) rotate to loose warp roller 1 in easing motion when weaving most advanced corresponding to angle after, the offset that swing roller leading screw 45 makes driven nut 45b be moved to the axle center 43a of eccentric shaft 43 is the position of described 2nd offset.In this situation, along with the displacement loose warp roller 1 of driven nut 45b moves upward, under the state that the offset of the axle center 43a of eccentric shaft 43 is described 2nd offset, loose warp roller 1 is in the state to retreating position movement.

Further, in the passive easing mechanism E4 of positive easing mechanism E2 and Figure 12 of Fig. 8, substitute and utilize described operation tool manually to carry out the rotation of ball-screw 45,63, also can carry out electric operating by the special actuator etc. arranged.

But, the invention is not restricted to any one embodiment above-mentioned, can various change be carried out when not departing from purport of the present invention.

Claims (3)

1. the Withdraw and keep-off device of loose warp roller in a loom, this loom comprises: loose warp roller, while it is supported in loom frame swingably, by sent by warp shaft warp thread institute around extension, position when weaving is set to, be positioned at least partially in the vertical direction than warp shaft upper end more below position; Easing mechanism, itself and described loose warp roller link and described loose warp roller are swung, and absorbing the tension change with weaving produced loom warp thread in one cycle, it is characterized in that with this,

Described easing mechanism is configured to, and described loose warp roller can be made in the vertical direction to swing and be moved to the retreating position of the hunting range exceeding described loose warp roller when weaving, and namely the lower end of described loose warp roller is than the retreating position of the upper end more top of described warp shaft.

2. the Withdraw and keep-off device of loose warp roller in loom according to claim 1, is characterized in that,

Described easing mechanism is positive easing mechanism, and it comprises: the linkage being linked to loose warp roller; The driving shaft rotated with the spindle synchronous of loom; To be supported on this driving shaft and the actuator be driven in rotation; And eccentric shaft, it is supported by described actuator, be set to make axis deviation support the axle center of the back shaft of this actuator, and be located at the loose warp bar comprised in described linkage loose warp roller opposition side an end on linking part link and described linkage moved back and forth in the longitudinal direction

This positive easing mechanism is configured to, and the offset in the axle center of the relatively described back shaft in axle center of described eccentric shaft, can be set as the 1st offset as offset when weaving, and described loose warp roller is moved to the 2nd offset of described retreating position.

3., according to the Withdraw and keep-off device of loose warp roller in the loom described in claim 2, it is characterized in that,

Described positive easing mechanism is the crank-type positive easing mechanism that described actuator is supported by described driving shaft,

This crank-type positive easing mechanism comprises: turning cylinder, and it is supported by described actuator, is set to the axle center making driving shaft described in axis deviation; Driving member, it is arranged in the mode around this turning cylinder, and is supported in described turning cylinder by bearing with the state that can relatively rotate; Fastener, it prevents the relative rotation of described turning cylinder and described driving member,

Described loose warp bar is configured to, and in centre can with described driving member engage while being rotatably linked to described driving member by the connection shaft being intercalated in a described end,

When weaving, described loose warp bar engages in described centre and described driving member, prevent the described loose warp bar at described connection shaft place from rotating relative to described driving member the state making described driving member and described loose warp bar be in one jointly operate thus, while described driving member plays a role as the described linking part of a part for the described loose warp bar of formation, described turning cylinder plays a role as described eccentric shaft and makes the offset in the axle center of the relatively described driving shaft in the axle center of described turning cylinder be described 1st offset;

When described loose warp roller is kept out of the way, described locking between described driving member with described loose warp bar is prevented the state of the relative rotation between described turning cylinder and described driving member while removing described loose warp bar is in state that described connection shaft place can rotate relative to described driving member by described fastener, while the part of connection shaft described in the intercalation in described loose warp bar plays a role as described linking part, described connection shaft plays a role as described eccentric shaft and makes the offset in the axle center of the relatively described driving shaft in the axle center of described connection shaft be described 2nd offset.