JP5138751B2 - Warp manufacturing method and partial warping machine - Google Patents

Description

  The present invention relates to a warp manufacturing method in which a warp drum is rotated and at least one warp band composed of a yarn sheet is wound around the warp drum to generate a yarn layer, wherein at least one internal dividing means (Internal dividing means) is used, and the dividing means includes a handle at one end protruding from the yarn layer, and the handle has a predetermined radial length.

  The invention further relates to a partial warping machine comprising a warping drum and at least one internal dividing means with a handle having a predetermined radial length relative to the warping drum.

Warp yarns generally have a number of yarns arranged in parallel and parallel so that not all yarns can be drawn simultaneously from one creel. For this reason, a plurality of yarns are generally collected as a so-called “warp band”, and the warp band is wound around the surface of the warp drum by rotating the warp drum, thus forming a yarn layer. .
When the warp band of a predetermined length is wound, the warp band is displaced in parallel with the axis of the warp drum, and the already wound warp band (another warp band) is wound again. This process is repeated until the desired warp width is reached.
In order to prevent the yarn from dropping at the end face of the warping drum, the warping drum has a cylindrical portion followed by a conical portion. In that case, the warp band is displaced and wound so as to follow the inclination angle of the conical portion in parallel with the axis of the warping drum for each rotation.

  In order to be able to be handled later by an operator, a dividing means that can also be referred to as a “dividing rod (Leeds rod)” is required. This dividing rod is, for example, in each case guided by one yarn above the dividing rod and by guiding one yarn below the dividing rod, so that, for example, different groups (for example adjacent groups) Group).

  The dividing rod must be newly positioned for each warp band. For example, such a dividing rod must be moved parallel to the axis of the warp drum by the width of the warp band. In order to facilitate this movement, the dividing rod has a handle at its end protruding from the thread layer. This handle can also be used to automate the displacement of the dividing rod. In that case, the partial warping machine has a corresponding gripping tool, which grips the handle and can be pulled parallel to the axis of the warping drum.

  However, in the above-described configuration, as a drawback, the configuration of the yarn layer can only be controlled within a certain limit. Only the tension of the wound yarn can be used practically as a parameter for the composition of the yarn layer. In that case, this can be a problem when the yarn has only a limited tensile strength. In that case, the yarn layer may be relatively soft.

  Another possibility to adjust the configuration of the yarn layer is to bring the pressure roller into contact with the yarn layer during winding so that the pressure roller can act on the yarn layer with a constant pressure. However, this has not been possible in the past because when the dividing means having a handle is used, the pressure roller collides with the handle of the dividing means. Colliding causes either pressure roller breakage or handle breakage. In either case, it is not desirable. Further, since the warp bands may have different widths, there is a problem that the axial dimension of the pressure roller cannot be limited to a predetermined dimension.

  An object of the present invention is to further expand the possibility of adjusting the configuration of the yarn layer.

  The problem is solved in a method of the type indicated at the outset by bringing the pressure roller into contact with the thread layer when the thread layer has reached a radial thickness that at least matches the radial length of the handle. Is done.

  Thus, the various advantageous effects of the pressure roller can also be utilized during warp production in which a dividing means having a handle is used. In that case, the warping process, ie the production of the warp, can be carried out highly automatically. When the winding of one warp band is complete, the dividing means with the handle acts in such a direction in the displacement direction, ie parallel to the axis of the warping drum, for example with a gripper or another automatic operating device. Can be moved continuously (automatically). The configuration of the yarn layer is positively adjusted by the pressure roller. However, this adjustment is limited to the yarn layer region starting radially outward of the handle radial length. But this is not a problem. This is because the radial length of the handle is considerably smaller than the radial thickness of the yarn layer itself. Therefore, although the partial region of the yarn layer has a configuration different from the main portion of the yarn layer, for example, it can be accepted that it has a slightly larger thickness.

  Preferably, when winding in parallel with the axis of the warping drum, the warp band is displaced at a predetermined displacement speed, and when the pressure roller is brought into contact with the yarn layer, the displacement speed is changed. That is. When the pressure roller is brought into contact with the yarn layer, that is, when external pressure is applied to the yarn layer by the pressure roller, the yarn layer hardness of the generated yarn layer is increased. At the same time, the density increases somewhat, and the increase in the diameter direction of the yarn layer per rotation decreases. This action can be easily dealt with by changing the displacement speed, i.e. changing the amount of displacement parallel to the axis of the warping drum for each rotation, so that the warp band is conical during winding. It can still be ensured that the warp drum can be followed at the cone angle of the shaped part.

  Preferably, at the time when the pressure roller is brought into contact with the yarn layer, at least one parameter of the yarn layer is stored, and when the yarn layer has this parameter again when the warp layer is continuously wound, it is added. The configuration is such that the pressure roller is brought into contact with the yarn layer. Such parameters can be, for example, the number of warping drum rotations already performed or the radial thickness of the yarn layer. In the generation of the subsequent warp band, if so-called copying is performed, the risk of excessive or insufficient warping of the warp band deposit is avoided. In that case, the uniformity in the width direction of the warp band is improved.

  Preferably, in the subsequent warp band, after the pressure roller contacts, the same change as that when the displacement speed has already contacted is performed. This also helps to produce the following warp band as a so-called copy of the previously wound warp band.

  Preferably, an external dividing means having a gripping area is used, the pressure roller being arranged away from the thread layer before the thread layer reaches a radial thickness where the pressure roller will collide with the gripping area. It is to be. In many cases, the dividing must be performed not only at the beginning but also at the end of the warp band. For this reason, for example, an external dividing means can be used. Since the external dividing means must also be displaced for each new warp band, a gripping area is also provided here that can be gripped either by hand or by an automatic operating device in order to carry out the displacement. However, since the gripping region protrudes laterally on the free side of the yarn layer, there is a possibility that the pressure roller collides with the gripping region. This problem can be easily addressed by moving the pressure roller away from the yarn layer before such a collision occurs. Instead of the radial thickness, another parameter can be used, for example the axial displacement movement of the pressure roller following the warp band displacement. However, since displacement and radial thickness are in a fixed correlation with each other over a given cone angle, the same effect is obtained in both parameters.

  Preferably, the displacement speed is changed after the pressure roller is moved away. After pulling off the pressure roller, the yarn layer again has a different density and thus a different hardness. In that case, the displacement speed can be changed again so that the resulting yarn layer follows the cone angle of the conical surface of the warping drum.

  The problem is solved in the partial warping machine of the type pointed out at the beginning by providing a pressure roller provided with a positioning drive device and an operation restricting part for restricting the operation inward in the radial direction. .

  Therefore, the partial warping machine provided with the pressure roller can be operated even when the dividing means provided with the handle is used. The situation where the pressure roller collides with the handle and damages the pressure roller and / or the handle is prevented by the radially inward operation restricting portion. With such a partial warping machine, the warping process can be performed at least fully automatically. When the winding of one warp band is completed to the required length, the warping drum is stopped and the dividing means is displaced by the width of the warp band. When a new warp band is wound up, this is also done under conditions that change. First, winding is performed without a pressure roller. The pressure roller is acted on only after the yarn layer has become thick enough that the pressure roller no longer collides with the handle when the pressure roller contacts. In order to simplify the operation control, the operation control can be easily realized by providing an operation limiting portion for the pressure roller. In other words, the pressure roller can never be moved radially inward enough to collide with the handle.

  Preferably, the operation limiting portion is formed as a part of the positioning drive device. This operation restriction unit can be formed in various ways. The operation restricting portion can be easily formed by a mechanical stopper that allows the pressure roller to move to a predetermined position inward in the radial direction. The operation restriction unit can be formed in the control device of the positioning drive device by using, for example, a limit switch or a program type control device.

  Preferably, the positioning drive device has a motion component in the displacement direction. That is, the pressure roller follows the displacement in which the wound warp band is displaced parallel to the axis of the warping drum. Thus, the pressure roller moves, so to speak, parallel to the conical portion of the warping drum, and the pressure roller only has to be slightly wider than the maximum width warp band.

  In this case, preferably, the positioning drive device is configured to have a displacement operation limiting portion. This configuration is advantageous, inter alia, even if an external dividing means having a gripping area is used. The gripping region protrudes in the axial direction from a pre-wound warp band. The pressure roller is moved not only outward in the radial direction but also in the displacement direction when winding the subsequent warp band. In that case, at a specific radial thickness of the warp band thus formed, the pressure roller is displaced in the axial direction of the warping drum so as to cause a possibility of colliding with the gripping area. However, before such a collision occurs, the pressure roller is lifted from the yarn layer, and the remaining warp band is wound without the influence of the pressure roller. In that case, the yarn layer has three parts, the central part in the radial direction being wound under the influence of the pressure roller, while the radially outer part and the radially inner part are wound without the influence of the pressure roller. Has been taken. However, such a thread layer can be formed with improved properties overall as compared to a thread layer produced without any pressure roller. The yarn layer portion wound up without the involvement of the pressure roller is so thin in the radial direction that the absence of such a pressure roller is not greatly affected.

1 is a schematic diagram showing a partial warping machine at the start of a winding process. It is a figure which shows the partial warping machine in the step which winding progressed. It is a figure which shows the partial warping machine in the step which winding has further advanced. It is a figure which shows the partial warper at the time of completion | finish of a winding process.

(Example)
Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.

  This partial warping machine 1 has a warping drum 2, which has a cylindrical part 3 and a conical part 4. The warping drum 2 is rotated by a drive device 5 shown schematically.

  A plurality of yarns are drawn in parallel to each other from a creel (not shown in detail) in which one bobbin is arranged for each yarn. A yarn sheet composed of yarns arranged in parallel is also referred to as a “warp band”. When the warping drum 2 rotates, such a warp band is wound around the circumferential surface of the warping drum 2 to form the yarn layer 6. In these figures, the yarn layer 6 is shown only on the lower edge of the warping drum 2 for the sake of clarity. In practice, the yarn layer 6 naturally goes around the circumferential surface of the warping drum 2.

  The lower layer of the warp band is fed to the cylindrical portion 3. All the other layers of the warp band are displaced in the displacement direction by a slight distance for each rotation of the warp drum 2, that is, parallel to the axis of the warp drum 2 (in this embodiment, to the left in the figure). 6 is formed following the conical portion 4 of the warping drum 2. Such displacement is caused by guiding the warp band via a guide device arranged on the warping table 7. The warping table 7 is moved in the displacement direction (see the arrow 8 in FIG. 1) by a slight dimension each time the warping drum 2 rotates.

  A pressure roller 9 is disposed on the warping table 7, and the pressure roller 9 can be moved in a radial direction so as to approach the warping drum 2. For this purpose, a positioning drive device 10 which is schematically shown is provided. The positioning drive device 10 can cause the pressure roller 9 to act on the yarn layer 6 at a constant pressure that can be adjusted by moving the pressure roller 9 toward the yarn layer 6. The positioning drive device 10 can also cause a displacement movement of the warping table 7.

  In order to produce warp yarns, it is generally necessary to divide individual yarns from one another and assign them to different groups. For this reason, dividing means are provided, and in the figure, only the handle (handle) 11 of the dividing means is shown. The handle 11 protrudes slightly outward in the radial direction from the cylindrical portion 3 of the warping drum 2 in the radial direction. A string or band (not shown) connected to the handle 11 is accommodated in the conical portion 4 of the warping drum 2 and can be drawn into the yarn layer 6 when the handle 11 moves.

  By the way, when the pressure roller 9 is brought into contact with the yarn layer 6, the handle 11 collides with the pressure roller 9. Then, the pressure roller 9 and / or the handle 11 are damaged. Either case is undesirable and must be prevented.

  That is, as can be seen from FIG. 2, the pressure roller 9 is configured to contact the thread layer 6 only when the thread layer 6 reaches a radial thickness larger than the radial length of the handle 11. In order to eliminate the collision between the pressure roller 9 and the handle 11, the positioning drive device 10 has an operation limiting portion, and pressurizes so that a collision occurs between the handle 11 and the pressure roller 9. A situation in which the roller 9 approaches the warping drum 3 is prevented by the operation limiting unit.

  When the pressure roller 9 is in contact with the yarn layer 6 and a constant pressing pressure can be applied to the yarn layer 6, the yarn layer 6 is wound with increased density. This is shown in FIG. In that case, the yarn layer 6 consists of two parts, that is, the part 6a wound up without the influence of the pressure roller has a slightly lower density than the part 6b wound up under the influence of the pressure roller. become. In the figure, the difference in density is indicated by different hatching.

  When the pressure roller 9 abuts against the yarn layer 6 and applies a pressing pressure to the yarn layer 6, the increase in the diameter of the yarn layer 6 for each rotation of the warping drum 2 is larger than when the pressure roller 9 does not work. Become smaller. Therefore, the value of the displacement movement for each rotation of the warping drum 2 is also smaller than when the pressure roller 9 does not act. Since we still want to move the yarn layer 6 on the conical part 4 of the warping drum 2, the amount of displacement movement of the warping table 7 carrying the guide device for the yarn sheet or warp band and the pressure roller 9 is This is smaller than when the pressure roller 9 abuts against the thread layer 6 and applies a pressing pressure to the thread layer 6. Accordingly, the displacement speed, that is, the displacement amount for each rotation of the warping drum 2 is correspondingly reduced when the pressure roller 9 acts on the yarn layer 6.

  The handle 11 is disposed in an internal dividing means, and this dividing means forms a hook at the end of the warp when the warp is unwound from the warping drum 2. In order to be able to form a shed or separation part at the initial end of the warp, an external dividing means is provided, and only the gripping region 12 of the external dividing means can be recognized from FIG. (See FIG. 4). The gripping region 12 protrudes from the yarn layer 6 in the axial direction, and the pressure roller 9 may collide with the gripping region 12 due to the displacement movement. In order to avoid such a collision between the pressure roller 9 and the gripping area 12, the pressure roller 9 is lifted from the yarn layer 6 before the pressure roller 9 can collide with the gripping area 12. . As a result, a third portion 6 c of the yarn layer 6 is generated, and this portion is wound up without being affected by the pressure roller 9. In that case, the third portion 6c of the thread layer 6 is somewhat lower in density than the central portion 6b. Therefore, the degree of displacement movement for each rotation of the warping drum 2 is somewhat larger than that in the central portion 6b.

  Specifically, a control device (not shown) stores various parameters of the winding process of the first warp band, that is, various parameters of the portion of the yarn layer 6 that directly follows the conical portion 4. These parameters include not only the yarn layer transition, that is, the increase in thickness over the number of revolutions, as has been known for a long time. The time when the pressure roller 9 abuts against the yarn layer 6 or the rotational speed of the warping drum 2 is also stored. Furthermore, the time point at which the pressure roller 9 is lifted from the yarn layer 6 (or the specific number of rotations of the warping drum 2) is also stored. In that case, when another warp band is wound up subsequently to the first yarn layer, the pressure roller 9 comes into contact with the yarn layer 6 at exactly the same time as in the first warp band, or the yarn Get out of contact with the layer. That is, the winding process of the other warp bands is performed as a copy of the winding process of the first warp band.

  The warp manufacturing method and the partial warper according to the present invention can be used for warp warping.

2 ... Warping drum
6 ... Yarn layer
9 ... Pressure roller
11 ... Handle

Claims (10)

A warp production method in which a warp drum (2) is rotated to wind up at least one warp band composed of a yarn sheet around the warp drum (2) to form a yarn layer (6);
At least one internal dividing means with one end protruding from the thread layer (6) is used,
The internal dividing means includes a handle (11) configured to protrude to a predetermined length in the radial direction of the warping drum and to be gripped at one end thereof ,
When the radial thickness of the front Kiitoso (6) has reached the predetermined length of the handle (11), so as to abut against the pressure roller (9) to the yarn layer (6) A warp manufacturing method characterized by comprising. When winding in parallel with the axis of the warping drum (2), the warp band is displaced at a predetermined displacement speed,
The warp manufacturing method according to claim 1, characterized in that the displacement speed is changed when the pressure roller (9) contacts the yarn layer (6). At the time when the pressure roller (9) contacts the yarn layer (6), at least one parameter of the yarn layer (6) is stored,
In the subsequent winding of the warp layer, when the yarn layer (6) has the parameters again, the pressure roller (9) is brought into contact with the yarn layer (6), The warp manufacturing method according to claim 1 or 2.   The warp manufacturing method according to claim 3, characterized in that the same change in the displacement speed is made after the pressure roller (9) abuts in a subsequent warp band. The internal dividing means is used to form a shed at the end of the warp band;
An external dividing means having a gripping area (12) is used to form a shed at the beginning of the warp band ;
Before the thread layer (6) reaches the radial thickness where the pressure roller (9) will collide with the gripping area (12), the pressure roller (9) is moved to the thread layer (6). The warp manufacturing method according to any one of claims 1 to 4, wherein the warp yarn is separated from the warp yarn.   6. The warp manufacturing method according to claim 5, wherein the displacement speed is changed after the pressure roller (9) is moved away. A warping drum (2), even without least having one internal Dividing means and the pressure roller (9), sectional warping machine (1),
The internal dividing means includes a handle (11) configured to protrude by a predetermined length in the radial direction with respect to the warping drum (2) and to be gripped,
The pressure roller (9) restricts the movement of the pressure roller (9) in the radial direction of the positioning drive device (10) that moves the pressure roller (9) in the direction of the yarn layer. sectional warping machine, characterized in that there Bei Ete the operation restriction unit to avoid collision with the handle.   The partial warping machine according to claim 7, wherein the operation restricting part is formed as a part of the positioning driving device (10).   The partial warping machine according to claim 7 or 8, characterized in that the positioning drive (10) has a motion component in the displacement direction (8).   The partial warping machine according to claim 9, characterized in that the positioning drive device (10) has means for limiting the displacement movement.

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