JP4177179B2 - A weft length measuring and storage device in a non-woven loom, and a method for setting a locking pin position of the weft length measuring and storage device. - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a weft length measuring storage device in a non-woven loom and a method for setting a position of a locking pin in the weft length measuring storage device, and more particularly, a weft yarn is rotated by a rotating yarn guide that continuously rotates around a stationary storage drum. A storage device that is wound around a storage drum and performs locking and unwinding of the weft by a locking pin that is driven forward and backward with respect to the periphery of the storage drum, and a weft from a yarn supplying body to the rotary yarn guide. And a length measuring device that continuously feeds at a speed substantially equal to the winding speed of the weft, the weft wound around the storage drum is unwound before weft insertion is started, and weft insertion is started. The present invention relates to a type of weft length measuring and storing device of a type in which weft insertion is performed by restrained flying in which wefts fed out are directly inserted through the rotary yarn guide.
[0002]
In this specification, the description related to the position of the locking pin refers to the position of the axis of the locking pin. For example, the “engagement position between the locking pin and the storage drum” It refers to the position where the axis of the pin intersects the peripheral surface of the storage drum, and the "straight line connecting the locking pin and the center of the storage drum" refers to the center of the locking pin tip and the center of the storage drum. It refers to a straight line that connects.
[0003]
[Prior art]
As a weft length measuring and storing device in the above type of unwoven loom, one described in Patent Document 1 is known. The length measuring storage device described in Patent Document 1 is configured to rotate continuously a predetermined number of times in a period from a weft insertion end timing to a next weft insertion end timing with respect to a stationary storage drum. A rotating yarn guide that performs a weft winding operation, and a length measuring device that continuously feeds the weft from the yarn feeder to the rotating yarn guide at a speed substantially equal to the winding speed of the rotating yarn guide are provided. Then, at a predetermined weft insertion start timing, the locking pin is driven backward from the engaged state with the storage drum so that the weft can be unwound, and at the same time, the pressure fluid for weft insertion from the weft insertion nozzle Is injected, so that the weft yarn that has been wound on the storage drum so far and is in the storage state is unwound from the storage drum and inserted while weaving (weft insertion by free flight).
[0004]
Further, in this type of length measuring storage device, the yarn guide is driven so as to wind the weft yarn having a length of one weft insertion (for one pick) around the storage drum over a period corresponding to one rotation of the loom. The winding speed by the rotating yarn guide is slower than the speed at which the weft is unwound from the storage drum with the weft insertion, and is half or less. Therefore, during the weft insertion period, the winding operation by the rotating yarn guide is continued even after the weft insertion is started, but the weft on the storage drum gradually decreases as the weft insertion proceeds. At the end of the weft insertion, all the wefts on the storage drum are unwound, and after that, the wefts fed from the length measuring device are pulled out directly (without going through the storage drum) from the rotary yarn guide. It will be in the state of restraint flying that is inserted in the weft. In the weft insertion (hereinafter, simply referred to as “constraint flying”), the weft is drawn out in a straight line between the rotating yarn guide and the yarn guide in front of the storage drum.
[0005]
In this process, the locking pin advances toward the circumferential surface of the storage drum after passing through the rotating yarn guide to make the last one rotation before the weft insertion end, and is able to lock the weft. .
[0006]
At the end of weft insertion, the rotary yarn guide is in a rotational position that coincides with the position of the locking pin, and the weft is locked by the locking pin, thus completing the weft insertion. Thereafter, the winding of the weft around the storage drum for the next weft insertion is started.
[0007]
It should be noted that an optimal period in which the restraint flight is performed is set in consideration of the influence of damage or the like on the weft thread to be inserted. That is, as described in Patent Document 1, the purpose of adopting the length measuring and storing apparatus of the above type is that when the weft insertion is completed, the weft is fastened to the locking pin and a large tension is applied to the weft. This is to prevent the weft from being damaged due to the action.
[0008]
However, if the weft insertion is performed so that all the wefts on the storage drum are unwound at an earlier timing from the start of the weft insertion, in other words, if the above-mentioned restrained flight period is set longer, in other words, the weft at the time of free flight Since the difference between the insertion speed and the weft insertion speed at the time of restraint flying becomes large, a large tension acts on the weft at the start of restraint flying, which may cause damage to the weft. On the other hand, when the weft insertion is performed so that the wefts fly freely over a longer period during the weft insertion period, the restraint flight period is set shorter, in other words, the conventional method described in Patent Document 1 Everything like the technology is closer to the free flight and the weft insertion is performed, and the same problem as this conventional technology occurs. Therefore, in consideration of these points, the optimum flying period is determined and set for the weft.
[0009]
[Patent Document 1]
JP 63-21955 (Claims etc.)
[0010]
[Problems to be solved]
However, in the length measuring storage device described in Patent Document 1 described above, there arises a problem that the weft yarn contacts a member or the like existing around the length measuring storage device and is damaged thereby.
[0011]
That is, as described above, in this type of length measuring storage device, the weft on the storage drum gradually decreases as the weft insertion proceeds, and the rotating yarn guide performs the last one rotation before the weft insertion ends. In this process, the rotational phase of the weft unwinding point on the storage drum catches up with the rotational phase of the rotating yarn guide, so that the weft is drawn in a straight line between the rotating yarn guide and the yarn guide in front of the storing drum. After that, it will be restrained flying.
[0012]
Further, as described above, the period during which the restraint flight is performed is set so as to be optimum for the weft, and in general, the rotary yarn guide is positioned relative to the position of the locking pin. The restraint flight is set to start from the time when the rotational position reaches about 180 °. And in the length measuring storage apparatus of patent document 1, since the latching pin is arrange | positioned perpendicularly | vertically above the center of the storage drum, the rotation position of the rotary yarn guide is the time when the restraint flight is started. This is the point in time when a position near the vertically lower position of the center of the storage drum during the last one rotation before the weft insertion is completed.
[0013]
However, in this type of length measuring storage device, the weft winding length around the storage drum gradually decreases during weft insertion by free-running, and the last one rotation before the weft insertion of the rotary yarn guide is completed. In some cases, the winding length of the weft around the storage drum is further reduced in a state of less than one turn. For this reason, on the storage drum before the start of restrained flight (before the unwinding point on the storage drum catches up with the rotational phase of the rotary yarn guide and some weft remains on the storage drum). The phenomenon that the wefts are unraveled all at once occurs.
[0014]
It is considered that this occurs when the winding length of the weft around the storage drum gradually decreases and the length becomes shorter than the length at which the binding force to the storage drum is obtained by winding.
[0015]
As described above, when the wefts of a predetermined length wound on the storage drum are unwound all at once before the restrained flight is started, the rotating yarn guide and the yarn guide in front of the storage drum The length of the weft spans between the two is increased by that amount, and as a result, the wefts are ballooned out to a greater extent than before. Note that this ballooning gradually decreases as the rotating yarn guide approaches the position of the restraint flying start time, and after the time when the restraining flying starts, as described above, the weft is composed of the rotating yarn guide and the storage drum. It is drawn out in a straight line with the front yarn guide.
[0016]
By the way, in a loom, a length measuring storage device may be directly supported by a frame of the loom, and in this case, a part of the loom frame is provided around the storage drum, particularly around the lower portion of the storage drum. In addition, there may be a member such as a bracket (hereinafter referred to as “peripheral member”) for supporting the length measuring storage device.
[0017]
As described above, there is a large ballooning of the weft that occurs before the restraint flying starts when the winding length of the weft around the storage drum is equal to or less than the predetermined length, and the periphery around the lower portion of the storage drum. There is a problem of contact with the member.
[0018]
In particular, as described above, the start time of the restraint flight is the time when the rotational position of the rotary yarn guide has been set near the vertical downward position of the center of the storage drum. There is a case where the rotation angle of the rotating yarn guide is delayed by about 10 ° at the maximum along with the change or the change in the winding diameter of the yarn feeder. Along with this, the occurrence start point of the above-mentioned large ballooning of the weft is also shifted in the rotation direction of the rotary yarn guide. Therefore, this large ballooning occurs at a position closer to the peripheral member, and the length of the weft contacting the peripheral member increases with the delay of the start time of the restraint flight. As a result, the weft yarn is greatly damaged, resulting in a weaving defect, or the weft insertion is not performed normally and a weft insertion error occurs.
[0019]
In view of the above-mentioned problems of the prior art, the present invention reduces the damage of the weft as a result of the contact between the unraveled weft and the peripheral member at the time of weft insertion in the above-described type of weft length measuring storage device as much as possible. The purpose is to prevent weaving defects and weft insertion errors.
[0020]
[Means for Solving the Problems]
In order to achieve the above object, the weft length measuring and storing device in the weaving loom of the present invention winds the weft around the storage drum by a rotating yarn guide that continuously rotates around the storage drum in a stationary state, and locks and releases the weft. And a storage device that is driven by a locking pin that is driven back and forth with respect to the periphery of the storage drum, and the weft yarn from the yarn supply body is continuously fed to the rotary yarn guide at a speed substantially equal to the winding speed of the rotary yarn guide. And a weft thread wound around the storage drum is unwound before weft insertion is started, and weft insertion is started.After that, the weft thread fed from the length measurement apparatus is directly passed through the rotary yarn guide. A type in which weft insertion is performed by restrained flying, and the engagement position of the locking pin with the storage drum is the vertical upward direction of the center of the storage drum The rotating yarn guide is disposed on the upstream side in the rotational direction of the rotating yarn guide and within a range up to a position where a horizontal line passing through the center of the storage drum and a circumferential surface of the storage drum intersect. This is the gist.
[0021]
Preferably, a straight line connecting the locking pin and the center of the storage drum forms an angle of 10 ° or more on the upstream side in the rotation direction of the rotary yarn guide with respect to a vertical line passing through the center of the storage drum. What is necessary is just to provide the said locking pin so that it may be provided so that this angle may be set to about 45 degrees.
[0022]
Moreover, the said locking pin is good also as what is provided in the circumferential direction of the said storage drum so that the attachment position can be adjusted.
[0023]
Further, according to the method of setting the locking pin position in the weft length measuring and storing device of the present invention, in the above-described type of weft length measuring and storing device, the weft insertion period by restraint flight is determined in advance and The position of the locking pin is set so that the rotational position of the rotary yarn guide when the residual yarn amount of the weft on the storage drum becomes less than a predetermined length is above the horizontal line passing through the center of the storage drum. This is the gist.
[0024]
The “predetermined length” mentioned above means that the winding length of the weft thread that is constrained to the storage drum by wrapping is reduced, the length is shortened and the restraining force on the storage drum is lost, and the storage drum This is the length of the weft on the storage drum when the upper weft is unwound all at once.
[0025]
[Action and effect]
According to the above-described weft length measuring and storing device of the present invention, the position where the locking pin and the storage drum engage to lock the weft, that is, the position of the rotary yarn guide at the end of the weft insertion is Compared to the type of length measuring storage device, it is upstream in the rotational direction of the rotary yarn guide. Therefore, the rotational position of the rotary yarn guide at the start of the restraint flight that ensures a predetermined restraint flight period is also upstream in the rotational direction, and accordingly the remaining yarn amount on the storage drum The rotational position of the rotary yarn guide at the time when becomes less than the predetermined length is also upstream in the rotational direction of the rotary yarn guide as compared to the conventional device. As a result, the contact length between the weft and the peripheral member is somewhat constant even if a delay occurs at the start of restraint flying due to the change in the physical properties of the weft and the change in the winding diameter of the yarn feeder as described above. It can suppress becoming larger.
[0026]
In particular, the position where the locking pin and the storage drum are engaged is 10 ° on the upstream side in the rotation direction of the rotary yarn guide, with respect to a vertical line passing through the center of the storage drum. If the angle is set so that the above-mentioned angle is set, the weft damage caused by excessive contact between the weft and the peripheral member can be prevented in most cases when the start time of the restraint flight as described above occurs. can do.
[0027]
Furthermore, the angle formed by the straight line connecting the locking pin and the center of the storage drum on the upstream side in the rotation direction of the rotary yarn guide with respect to the vertical line passing through the center of the storage drum is an angle sufficiently larger than the above 10 °, for example, If the position of the locking pin is set to be about 45 °, it is only necessary to prevent the contact amount between the weft and the peripheral member from becoming excessive with the delay of the start time of the restraint flight as described above. Therefore, the contact itself between the weft and the peripheral member can be reduced, and even if the weft used is easily damaged, damage due to the contact with the peripheral member can be prevented.
[0028]
Note that the position of the locking pin is the position where the locking pin and the storage drum are engaged with each other, the horizontal line passing through the center of the storage drum intersects with the peripheral surface of the storage drum, or the rotational direction of the rotary yarn guide is more than that. By setting so as to be on the downstream side, attachment and adjustment operations of the locking pin can be easily performed without being disturbed by the peripheral members. In particular, if it is set in the vicinity of the 45 ° angular position as described above, the operation can be performed more easily.
[0029]
Further, by making it possible to adjust the mounting position of the locking pin in the circumferential direction of the storage drum, the position of the locking pin can be arbitrarily set within the above range, and the position of the locking pin can be adjusted. It is possible to set an optimum value in consideration of the start time of restrained flight, the positions of peripheral members, and the like.
[0030]
Furthermore, according to the setting method of the locking pin position in the weft length measuring and storing apparatus of the present invention, in the above-described type of weft length measuring and storing apparatus, the weft thread on the storage drum is unwound from the storing drum when the weft is inserted. The rotational position of the rotary yarn guide when the remaining yarn amount becomes less than the predetermined length is before the rotary yarn guide reaches near the lower part of the storage drum where the peripheral member exists and is higher than the height position of the peripheral member. Ballooning is eliminated to some extent when the rotating yarn guide reaches the position where the peripheral member exists, so that damage to the weft due to contact between the weft and the peripheral member should be avoided as much as possible. Can do.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0032]
1 and 2 show an embodiment of the present invention, in which a weft length measuring storage of the present invention is applied to a continuous loom, for example, a water jet loom in which a weft insertion nozzle 5 is fixed to a frame 1 of a loom. The example of the example which employ | adopted the apparatus 3 is shown. The weft length measuring and storing device 3 includes a storing device 10 supported by the frame 1 of the loom, and a length measuring device 20 and a weft locking device 30 supported by the storing device 10.
[0033]
In the storage device 10, a fixed cover 11 is supported on the frame 1 of the loom via a bracket 8, and a rotary shaft 13 is rotatably supported in the fixed cover 11 via a bearing 12. Further, a pulley 13b is assembled to the rotating shaft 13 on the rear end side, and the pulley 13b is operatively connected to a driving shaft driven by a main shaft of a loom (not shown) and a timing belt 6. Accordingly, the rotary shaft 13 is driven to rotate in synchronization with the main shaft of the loom via the timing belt 6 and the pulley 13b, and continuously rotates at a constant speed by a predetermined number of times set in advance for each rotation of the loom. Driven.
[0034]
Further, a holder 17b is assembled to the rotary shaft 13 so as not to rotate in the vicinity of the intermediate portion of the rotary shaft 13, and the yarn introduction tube is fitted into the holder 17b in a hole 17d formed in the holder 17b. 17c is attached. A rotating yarn guide 17 is attached to the tip of the yarn introduction tube 17c. Further, the inner hole of the yarn introduction pipe 17c communicates with the yarn introduction hole 13a formed in the rotary shaft 13 through the hole 17d of the holder 17b, and the weft Y supplied from the length measuring device 20 to be described later is provided. The yarn guide 9 is introduced into the yarn introduction pipe 17c through the yarn introduction hole 13a and the hole 17d and supplied to the rotary yarn guide 17.
[0035]
Further, a fixed disk 15 that supports a drum holder 16 to which a drum piece 19 a that forms a storage drum 19 is attached is assembled to the front end portion of the rotating shaft 13. It is assembled to be rotatable. However, a plurality of permanent magnets 15 a, 15 a,... Are embedded on the outer periphery of the fixed disk 15 at a predetermined interval, while the permanent magnets 15 a of the fixed disk 15 are embedded in the fixed cover 11. A magnet casing 18 having a surface facing the surface in which 15a,... Is embedded is fixed, and a plurality of permanent magnets 18a, 18a,. The fixed disk 15 is in a state in which relative rotation with respect to the fixed cover 11 accompanying rotation of the rotary shaft 13 is prevented by the attractive action of the permanent magnets 15a and 18a. .
[0036]
The length measuring device 20 includes a rotating roller 21 supported by the fixed cover 11 via a shaft 25 and a driven roller 23 supported by a support arm 26 attached to the fixed cover 11 at the rear end.
[0037]
A shaft 25 that supports the rotating roller 21 is rotatably supported by the fixed cover 11 via a bearing 22. A pulley 25 a is assembled to the shaft 25, and the pulley 25 a is connected to the pulley 13 b by the timing belt 6. Accordingly, the rotating roller 21 is driven to rotate in synchronization with the main shaft of the loom through the timing belt 6, the pulley 25 a and the shaft 25 in the same manner as the rotating shaft 13.
[0038]
The driven roller 23 is in pressure contact with the rotating roller 21, and the weft Y drawn from a yarn supplying body (not shown) is sandwiched between the driven roller 23 and the rotating roller 21. ing. Accordingly, when the rotary roller 21 is rotationally driven, the weft Y is continuously fed toward the yarn guide 9 at a predetermined speed in cooperation with the driven roller 23.
[0039]
The speed at which the weft Y is fed by the length measuring device 20 is set to be approximately equal to the winding speed at which the weft is wound around the storage drum 19 by the rotating yarn guide 17. That is, the length measuring device 20 sends out the weft for one turn of the storage drum while the rotary yarn guide 17 makes one rotation, and the weft for one weft insertion at a constant speed in a period corresponding to one rotation of the loom. It is set to send out continuously.
[0040]
The weft locking device 30 is supported by a support portion 18b formed integrally with a magnet casing 18 fixedly supported by the fixed cover 11, and is disposed so as to face a predetermined drum piece 19a.
[0041]
The weft locking device 30 includes a driving means (not shown) such as an electromagnetic solenoid, and a locking pin 31 that is driven forward and backward by the driving means. Then, the locking pin 31 is driven forward and backward toward the insertion hole 19b formed in the opposing drum piece 19a, whereby the weft can be locked and the weft from the storage drum 19 can be unwound. .
[0042]
In front of the weft length measuring and storing device 3, a clamper 7 placed on the frame 1 and yarn guides 4 a and 4 b provided before and after the clamper 7 are provided. The weft Y drawn from 19 is guided to the weft insertion nozzle 5 via the yarn guide 4a, the clamper 7 and the yarn guide 4b.
[0043]
The operation of the weft length measuring and accumulating device 3 in the plain weaving machine having the above configuration is substantially as described above. That is, based on FIG. 3, the rotational position of the rotary yarn guide 17 substantially coincides with the position of the locking pin 31 at the timing when the weft insertion is finished (in the illustrated example, the loom crank angle is 270 °). Accordingly, the weft Y drawn from the rotary yarn guide 17 is locked to the locking pin 31 at the end of the weft insertion, and winding around the storage drum 19 is started again. Further, the rotating yarn guide 17 is set to a predetermined number of times (5 rotations in the illustrated example) from the end of the weft insertion to a period corresponding to one rotation of the loom (until the end of the next weft insertion). And the winding operation of the weft Y around the storage drum 19 is performed.
[0044]
Thereafter, when the weft insertion start timing is reached again (in the illustrated example, the loom crank angle is 90 °), the locking pin 31 is retracted and the weft Y can be released from the storage drum 19, and the weft insertion is performed. The weft insertion is started by the injection of the pressure fluid from the nozzle 5 and the release of the clamper 7, and the weft Y wound on the storage drum 19 until then is unwound and inserted in a free-running state. Further, during this weft insertion period, the unwinding speed by the weft insertion is larger than the winding speed by the rotating yarn guide 17, so that the weft Y on the storage drum 19 gradually decreases.
[0045]
Then, after passing through the position of the locking pin 31 to perform the last one rotation (the winding operation of the fifth turn) before the end of the weft insertion, the locking pin 31 is directed toward the insertion hole 19b of the drum piece 19a opposed to it. Then, the weft Y is locked. Thereafter, all the wefts Y on the storage drum 19 are unwound, and the weft insertion by restrained flying is started from the point when the wefts Y are in a straight line between the rotary yarn guide 17 and the yarn guide 14a. In addition, the start time of restraint flying is set to the time when the rotary yarn guide 17 rotates about a half turn (180 °) from the position of the locking pin 31. Thereafter, the weft insertion by restraint flight is performed until the weft insertion end time, and the above operation is repeated again from the weft insertion end time.
[0046]
In this type of weft length measuring and storing device, in the illustrated example, the locking pin 31 of the storing device 10 is based on a conventional model (a dotted line in FIG. 2) provided at a position vertically above the center C of the storing drum 19. Is also upstream of the rotational direction of the rotary yarn guide 17 (the direction of the arrow K in FIG. 2), and is a straight line L connecting the locking pin 31 and the center C of the storage drum 19, that is, the storage drum of the locking pin 31. The straight line L connecting the engagement position to the storage drum 19 and the center C of the storage drum 19 is arranged at an angle of 45 ° with respect to the vertical line V passing through the center C of the storage drum 19 (FIG. 1). In FIG. 2, the locking pin 31 (weft locking device 30) is illustrated as being provided at a position vertically above the center C of the storage drum 19. This is understood by the configuration of the weft locking device 30. It ’s just shown here for convenience. Te, in fact, similarly to FIG. 2, it is arranged so as to form an angle of 45 ° to a vertical line V passing through the center C).
[0047]
Therefore, in this storage device 10, the rotational position of the rotary yarn guide 17 at the end of the weft insertion is a position that precedes the vertical upper position of the center C by 45 °, and accordingly, the start time of restrained flight is also This is the time when the rotational position of the rotary yarn guide 17 during the last one rotation before the weft insertion has reached a position 45 ° ahead of the vicinity of the position vertically below the center C.
[0048]
As a result, the rotational yarn guide 17 at the time when the residual yarn amount of the weft Y on the storage drum 19 becomes less than a predetermined length and is unraveled at the same time, that is, at the start of the occurrence of large ballooning as described above. Is positioned higher than the horizontal line H passing through the center C located above the peripheral members such as the frame 1 existing around the lower portion of the storage drum 19. The ballooning of the weft Y is generated from the position of the rotary yarn guide 17. Therefore, when the rotary yarn guide 17 is at the high position as described above, the large ballooned weft Y is the peripheral member. Never touch.
[0049]
Further, the ballooning of the weft Y is gradually reduced as the rotating yarn guide 17 approaches the rotational position at the time when the restraint flying starts, so that the rotating yarn guide 17 reaches the vicinity of the position where the peripheral member exists. At the time, the ballooning of the weft Y is small. Accordingly, the length of the weft Y that contacts the peripheral member becomes sufficiently small, and thus the damage of the weft Y can be avoided as much as possible.
[0050]
Further, in the illustrated storage device 10, the position of the locking pin 31 can be adjusted along the circumferential direction of the storage drum 19. Specifically, the magnet casing 18 that supports the weft locking device 30 via the support portion 18b is fixed to the fixed cover 11 by the screw member 11a via a long hole 18c formed along the outer periphery thereof. Accordingly, the magnet casing 18 can be rotated with respect to the fixed cover 11 along the long hole 18c by loosening the screw member 11a, and the rotation of the magnet casing 18 causes the weft locking device 30 to be within the range of the long hole 18c. Thus, the position can be changed along the circumferential direction of the storage drum 19.
[0051]
Further, as described above, the fixed disk 15 that supports the drum piece 19a of the storage drum 19 via the drum holder 16 is prevented from rotating relative to the magnet casing 18 by the attraction action of the permanent magnets 15a and 18a. . Therefore, when the magnet casing 18 is rotated with respect to the fixed cover 11 as described above, the fixed disk 15 is also rotated by the same amount. Therefore, even when the position of the weft locking device 30 is changed, the positional relationship between the weft locking device 30 and the drum piece 19a facing it does not change, and the insertion hole 19b of the drum piece 19a facing the locking pin 31 is not changed. Is maintained in an opposing state.
[0052]
Note that the position adjustment range of the locking pin 31 can be freely set by the formation length of the long hole 18c. Therefore, the locking pin 31 is within a desired range within the range up to the horizontal line H passing through the center C and upstream of the vertical position of the center C of the storage drum 19 in the rotational direction of the rotary yarn guide 17. What is necessary is just to form the long hole 18c suitably so that the engagement position to the storage drum 19 can be adjusted.
[0053]
[Other Embodiments]
In the embodiment described above, the straight line L connecting the locking pin 31 (the engagement position between the locking pin 31 and the storage drum 19) and the center C of the storage drum 19 is 45 ° with respect to the vertical line V passing through the center C. However, the arrangement of the locking pin 31 in the present invention is not limited to this, and the locking pin 31 is more than the vertical line V passing through the center C. Is also upstream of the rotational yarn guide 17 in the rotational direction and extends to the horizontal line H passing through the center C (the straight line L connecting the locking pin 31 and the center C makes a maximum of 90 ° with respect to the vertical line V. Up to the range).
[0054]
According to such a configuration of the present invention, compared with the conventional weft length measuring and storing device of the above type, the restraint flying is started during the last one rotation before the weft insertion of the rotating yarn guide. Excessive contact between the weft yarn generated before and the peripheral member existing around the lower portion of the storage drum can be reduced.
[0055]
In particular, the position of the locking pin 31 is set so that the straight line L connecting the locking pin 31 and the center C makes an angle of 10 ° or larger with respect to the vertical line V. It can be prevented that the weft Y and the peripheral member are excessively brought into contact with each other due to the delay in the start of the restrained flight accompanying the change in the winding diameter of the yarn feeder, and the weft is not damaged due to the contact.
[0056]
Further, as in the above-described embodiment, the angle between the vertical line V and the straight line L connecting the locking pin 31 and the center C is sufficiently larger than the above-described 10 °. By setting in this way, the contact itself between the weft Y and the peripheral member can be slight or almost absent, and even if the weft is susceptible to damage or the like, the contact with the peripheral member Damage can be avoided.
[0057]
The position of the locking pin 31 within the above range may be set appropriately in consideration of the type of weft Y to be inserted, the number of rotations of the rotating yarn guide 17, and the like. Further, when the remaining yarn amount of the weft Y on the storage drum 19 during the last one rotation before the end of the weft insertion of the rotary yarn guide 17 becomes equal to or less than a predetermined length, that is, the weft Y from the storage drum 19 described above. Considering the rotational position of the rotating yarn guide 17 and the height position of the peripheral members at the time when they are unraveled all at once, the rotational position of the rotating yarn guide 17 at that time is at least a horizontal line passing through the center C of the storage drum 19. You may make it set the position of the latching pin 31 so that it may become a position higher than H. FIG.
[0058]
Further, in the present invention, the angle between the vertical line V and the straight line L connecting the locking pin 31 and the center C is 90 ° at the maximum at the position of the locking pin 31 on the upstream side of the rotary yarn guide 17. By setting within such a range, the weft locking device 30 can be attached, positioned and adjusted without any trouble.
[0059]
In the above-described embodiment, the magnet casing 18 that supports the weft locking device 30 is configured so that the position of the weft locking device 30 (locking pin 31) can be changed along the circumferential direction of the storage drum 19. Although it was supposed to be rotatable with respect to the fixed cover 11, instead of this, for example, the configuration shown in FIGS.
[0060]
In the configuration shown in FIGS. 4 to 6, the weft locking device 30 is supported not by the magnet casing 18 but by the fixed cover 11, and via the bracket 33 with respect to the guide 11 b attached to the peripheral surface of the fixed cover 11. Installed.
[0061]
Further, the guide 11b extends on the peripheral surface of the fixed cover 11 from the upper position to the upstream side in the rotation direction of the rotary yarn guide 17 over a range of about ¼ circle, and at both ends thereof, the guide 11b is attached to the fixed cover 11. Screw members 11d and 11d are attached to the upper ends of the support portions 11c and 11c provided integrally. Therefore, between the support portions 11c and 11c, a gap exists between the guide 11b and the fixed cover 11 by the height of the support portion 11c. Further, as shown in FIG. 6, the guide 11b is formed with elongated holes 11e and 11e between the support portions 11c and 11c through which the screw members 33a and 33a screwed into the bracket 33 are inserted.
[0062]
A fixing member 33b is provided on the side of the guide 11b opposite to the bracket 33, that is, at a position corresponding to the bracket 33 in the gap between the fixed cover 11 and the guide 11b. The member 33a is screwed.
[0063]
Therefore, in the storage device in this embodiment, by tightening the screw members 33a, 33a, the guide 11b is tightened by the bracket 33 and the fixing member 33b, thereby fixing the position of the bracket 33 with respect to the guide 11b. . On the contrary, by loosening the screw members 33a and 33a, the tightening state of the guide 11b by the bracket 33 and the fixing member 33b is released, and the bracket 33 can move in the longitudinal direction of the guide 11b along the long hole 11e. . Thereby, the circumferential position of the storage drum 19 of the weft locking device 30 (locking pin 31) is adjusted.
[0064]
In the case of this configuration, since the position of the locking pin 31 is adjusted independently of the storage drum 19, the circumferential position of the drum piece 19 a of the storage drum 19 is adjusted according to the change of the position of the locking pin 31. It must be changed and adjusted so that the insertion hole 19b of the drum piece is located at a position facing the locking pin 31.
[0065]
Regarding the position adjustment of the drum piece 19a, as described above, the fixed disk 15 that supports the drum piece 19a is rotatable with respect to the rotary shaft 13, and is fixed to the fixed cover 11 by the attraction action of the permanent magnets 15a and 18a. Since the rotational phase is maintained, it is possible to rotate the fixed disk 15 by applying a force larger than the attractive force of the permanent magnet. Therefore, the drum piece 19a in which the insertion hole 19b is formed becomes the locking pin 31 again by rotating the fixed disk 15 in the same direction as the operator adjusts the position of the locking pin 31 in the circumferential direction. Can be opposed.
[0066]
However, since the rotational position of the fixed disk 15 is adjusted in units of one pitch of the permanent magnet, the position of the locking pin 31 and the position of the insertion hole 19b of the drum piece 19 may not necessarily match. In this case, the same configuration as that of the embodiment of FIGS. 1 and 2, that is, the configuration of the long hole 18c and the screw member 11a formed in the magnet casing 18 is used. The deviation from the insertion hole 19 may be finely adjusted.
[0067]
In addition to the above-described configuration, the configuration described in FIGS. 7 and 8 is also conceivable as a configuration in which the position of the weft locking device 30 (locking pin 31) can be changed along the circumferential direction of the storage drum 19. . 7 and 8 is the case where the weft locking device 30 is supported by the magnet casing 18 in the same manner as the embodiment of FIGS. The structure of the locking device and its support is omitted.
[0068]
7 and 8, the magnet casing 18 is fitted inside the front end portion 11f of the fixed cover 11 at its outer peripheral surface 18d, and slides along the inner peripheral surface of the front end portion 11f. It is designed to rotate.
[0069]
In the configuration of FIG. 7, as a means for preventing rotation of the magnet casing 18 d with respect to the fixed cover 11, a pressing and fixing member 34 that comes into contact with the front end surfaces of both the fixed cover 11 and the magnet casing 18 is provided. The pressing fixing member 34 is fixed to the distal end surface 11g of the fixing cover 11 by a screw member 34a, and is pressed against the distal end surface 18e by abutting the distal end surface 18e of the magnet casing 18 and tightening the screw member 34a. It has become so. Therefore, in the configuration of FIG. 7, the screw cover 34a is tightened to prevent the relative rotation of the fixed cover 11 and the magnet casing 18, and the screw cover 34a is loosened to loosen the screw cover 34a. The casing 18 can rotate relative to the casing 18, and the rotational phase of the magnet casing 18 relative to the fixed cover 11 can be adjusted.
[0070]
Further, in the configuration of FIG. 8, as a means for preventing rotation of the magnet casing 18 d with respect to the fixed cover 11, a push screw 35 screwed into the distal end portion 11 f of the fixed cover 11 is provided, and this push screw 35 is screwed. As a result, the tip end part comes into contact with the outer peripheral surface 18 d of the magnet casing 18. Therefore, in the configuration of FIG. 8, when the push screw 35 is screwed in, the tip of the push screw 35 is pressed against the outer peripheral surface 18 d of the magnet casing 18, whereby the fixed cover 11 and the magnet casing 18 are brought together. When the relative rotation is prevented and the fixing screw 35 is returned, the fixed cover 11 and the magnet casing 18 can rotate relative to each other, and the rotational phase of the magnet casing 18 relative to the fixed cover 11 can be adjusted. .
[0071]
The present invention is not limited to any of the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view showing an embodiment of a weft length measuring storage device of the present invention.
FIG. 2 is a front view of an essential part in the embodiment shown in FIG.
FIG. 3 is a timing chart showing the operation of the weft length measuring storage device of the present invention.
FIG. 4 is a partial cross-sectional side view showing the main part of another embodiment of the weft length measuring and storing apparatus of the present invention.
FIG. 5 is a front view of an essential part in the embodiment shown in FIG. 4;
6 is a schematic diagram showing a position adjusting mechanism of the weft locking device in the embodiment shown in FIG. 4;
FIG. 7 is a cross-sectional side view showing the main part of another embodiment of the weft length measuring and storing device of the present invention.
FIG. 8 is a cross-sectional side view showing a main part of another embodiment of the weft length measuring and storing apparatus of the present invention.
[Explanation of symbols]
1 Loom frame
3 Weft measurement and storage device
5 Weft insertion nozzle
10 Storage device
17 Rotating yarn guide
19 Storage drum
19a drum piece
19b Locking pin insertion hole
20 Measuring device
21 Rotating roller
23 Followed roller
30 Weft locking device
31 Locking pin
Y weft
C Center of storage drum
V Vertical line
H Horizontal line

Claims (1)

The weft drawn from the yarn feeder is wound around the storage drum by a rotating yarn guide that continuously rotates around the storage drum in a stationary state, and the weft is engaged and unwound with respect to the storage drum. And a length measuring device that continuously feeds the weft yarn toward the rotating yarn guide at a speed substantially equal to the winding speed of the rotating yarn guide,
Prior to the start of weft insertion, the weft thread wound around the storage drum is released from the engagement pin and the weft insertion is started, and then the weft thread fed from the length measuring device is passed through the rotary yarn guide. It is a type in which weft insertion is carried out by restrained flight that is directly inserted
The locking pin is configured to be position-adjustable along the circumferential direction of the storage drum, and the engagement position with the storage drum is higher than the vertical upper position at the center of the storage drum. It is fixedly arranged within a range up to the position where the horizontal line passing through the center of the storage drum and the peripheral surface of the storage drum intersect with each other on the upstream side in the rotation direction of the guide,
A weft length measuring and storing device in a weaving loom characterized by the above.

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