JP6118508B2 - Warp urging method in warp tension adjusting device of tire cord weaving device - Google Patents

Description

  The present invention relates to a tire cord weaving device for weaving a tire cord fabric including a suede weaving portion and a tabby portion, wherein a creel device for supplying warp yarns and a plurality of warp yarns drawn from the creel device have uniform tension. The present invention relates to a warp tension adjusting device in a tire cord weaving apparatus including a warp tension adjusting device including a dancer roller for converting the loom, and a loom for weaving a tire cord fabric with warps supplied via the warp tension adjusting device.

  Tire cord fabric is a type of woven fabric for rubber reinforcement used in the manufacture of carcass layers and belt layers that form the skeleton of rubber tires. The weft density and weft density are very coarse compared to ordinary fabrics. However, it contains a dense tabby part compared to the Sudare weaving part.

  As shown in FIG. 17, a tire cord weaving device 91 for weaving a tire cord fabric includes, as main components, a creel device 2 for supplying warp yarns 7, a warp tension adjusting device 92 for adjusting the tension of warp yarns 7, and a loom for weaving. 4 and a separate winding device 5 for winding the woven tire cord fabric. The warp yarns 7 are pulled by a plurality of bobbins 2a of the creel device 2 by being pulled by a feeding device 4a included in the loom 4, but the tensions of the warp yarns 7 drawn from each of the multiple bobbins 2a are different. Therefore, the warp tension adjusting device 92 installed between the creel device 2 and the loom 4 aligns the warp yarns 7 drawn from the creel device 2 in a horizontal row and forms a sheet, and the tension of each warp yarn 7 is adjusted. Almost uniform.

  The warp tension adjusting device 92 has a dancer roller 93 for equalizing the tension of a large number of warps 7 drawn from the creel device 2 and keeping the tension in a certain range. The dancer roller 93 is provided on the sheet-like warp 7 pulled out from the creel device 2 and aligned in a horizontal row, equalizes the tension of the warp 7 by its own weight, and each warp in the vertical direction. 7 is balanced with the resultant tension (hereinafter also simply referred to as “warp tension”). Accordingly, when the tension of the warp 7 changes during weaving of the loom 4, the dancer roller 93 moves up and down so as to maintain a balance between its own weight and the tension of the warp 7. The warp tension adjusting device 92 detects the drop of the dropper pin accompanying the disappearance of the tension of the warp 7 due to warp breakage, and detects the dropper device 94 upstream of the dancer roller 93 (the creel device 2). The warp breakage of the warp 7 supplied from the creel device 2 to the warp tension adjusting device 92 is monitored.

  By the way, as described above, the weaving portion of the tire cord fabric has a weft density of about 2.5 inches / piece and is very rough compared to the tabby portion and other general fabrics. For this reason, in the tire cord weaving device 91, when weaving the suede weaving portion, the feed speed of the warp yarn 7 is very fast, and the warp yarn 7 is pulled out from the creel device 2 at a very high speed, and the bobbin 2a Is rotating at high speed. In such a state, some abnormality (for example, weaving failure such as a weft insertion error) occurs during weaving of the suede weaving section, and a stop signal is output from the control device to each device constituting the tire cord weaving device 91. Then, in the loom 4, the feeding device 4a stops relatively quickly, but in the creel device 2, the bobbin 2a that has been rotating at a high speed as the warp yarn 7 is pulled out does not stop immediately due to its own inertia. Even after 4 stops and the pulling of the warp 7 by the feeding device 4a stops, the so-called “warp overrun” state occurs in which the warp 7 is coasted and sent from the creel device 2 to the warp tension adjusting device 92 side.

  When the warp 7 is sent out from the creel device 2 in such a “warp overrun” state, the extra warp 7 sent to the warp tension adjusting device 92 is mainly loosened upstream of the dancer roller 93. . This is because, when the loom 4 is stopped, the warp 7 is not pulled by the feeding device 4a of the loom 4 and the looseness of the warp 7 is absorbed only by the dancer roller 93, but the warp 7 is upstream of the dancer roller 93. Since the path of the warp yarn 7 is turned around by the guide roll 95, the weight of the dancer roller 93 is reduced by the sliding resistance generated between the guide roll 95 and the warp yarn 7. This is because the pulling force due to is not easily spread to the warp yarn 7 on the upstream side of the guide roll 95.

  When the warp 7 is loosened upstream of the dancer roller 93 and the tension of the warp 7 is reduced, the dropper pin position of the dropper device 94 is lowered accordingly, and the same state as when the yarn breakage occurs, that is, the dropper pin It will be in the state which contacted the contact bar (electrode). As a result, the warp breakage detection signal is output from the dropper device 94 even if no warp breakage has occurred, and the loom 4 is restarted.

  As a known technique corresponding to such a problem, there is one described in Patent Document 1. In the technique described in Patent Document 1, when the loom stops, the dancer roller is forcibly pulled down by the actuator to absorb the looseness of the warp due to the warp overrun. Specifically, a fluid pressure cylinder is connected to a support member that supports the dancer roller, and when the loom stops, the fluid pressure cylinder is operated to apply a force to pull down the dancer roller in addition to the force of the dancer roller due to its own weight. Is forcibly pulled down to increase the warp path length between the dancer roller and the guide rolls located on both sides of the dancer roller, and absorb the looseness of the warp due to warp overrun.

JP-A-11-117149

  As in the technique described in Patent Document 1, when the dancer roller is pulled down by the fluid pressure cylinder in order to absorb the looseness of the warp and prevent the dropper from descending, in order to reliably absorb the looseness of the warp, It is necessary to actively pull the warp as it is lowered. Therefore, when the dancer roller is pulled down, a traction force that is the sum of the force of the dancer roller due to its own weight and the force of the fluid pressure cylinder acts on the warp. Then, the dancer roller is displaced to the lowest lowered position in the state where the traction force is applied to the warp and stops.

  Therefore, in the state where the dancer roller is displaced to the lowest position and stopped, the warp tension in the warp tension adjusting device is compared with that during the weaving, that is, when the tension is adjusted by the weight of the dancer roller. It is in a high state as much as it is actively pulled by the force of the fluid pressure cylinder. Further, the warp path length in the warp tension adjusting device in this state is in a state of being increased by the amount of the warp drawn from the creel device in accordance with the downward displacement of the dancer roller.

By the way, when the operation of the fluid pressure cylinder is stopped and the force by the fluid pressure cylinder is released while the loom stops after the dancer roller is lowered as described above, the tractive force acting on the warp is only the force due to the weight of the dancer roller. . As a result, the warp tension is higher than the traction force acting on the warp, and the dancer roller is lifted by the warp.

  When the dancer roller is lifted by the warp, the warp path length in the warp tension adjusting device is shortened according to the upward displacement amount of the dancer roller. At this time, since the feeding device of the loom that actively pulls the warp is stopped, there is no movement toward the downstream side of the warp in the warp tension adjusting device, and the warp is stopped. For this reason, the shortened warp path length in the warp tension adjusting device is absorbed by the displacement of the dropper pin that exerts its own weight on the warp similarly to the dancer roller. As a result, the dropper pin is displaced downward as in the case of warp breakage. As a result of the dropper pin being displaced downward, the dropper pin comes into contact with the contact bar, and a warp breakage detection signal is output.

  In the state where the dropper pin is lowered and the warp breakage detection signal is detected as described above, the loom control unit ignores the warp breakage detection signal for a certain period from the restart when the loom is restarted. It is necessary to make a state of not detecting. However, in that case, if the cause of the initial stop was a plurality of causes including warp breakage, and the warp breakage was overlooked, the dropper device detects the true warp breakage and outputs a warp breakage detection signal. However, since the loom is restarted despite this, the loom stops again immediately after the restart, which causes a problem that a great deal of labor is required for the repair work and the like.

  Accordingly, an object of the present invention is to prevent the warp yarn from loosening during the stoppage period of the weaving machine of the tire cord weaving device, thereby preventing the false detection by the dropper device in the warp tension adjusting device, and to stably restart the loom. That is.

  The present invention relates to a tire cord weaving device (1) for weaving a tire cord fabric including a suede weaving portion and a tabby portion, comprising a creel device (2) for supplying warps, and the creel device (2). A dancer roller (10a, 10b) for equalizing the tension of a plurality of drawn warps and a dropper device (8) for detecting a warp breakage arranged upstream of the dancer rollers (10a, 10b). A warp yarn in a tire cord weaving apparatus (1) including a warp tension adjusting device (3) including a weaving machine (4) for weaving a tire cord fabric with a warp supplied via the warp tension adjusting device (3). The tension adjustment device (3) is assumed.

The warp urging method according to the present invention is based on the above-mentioned problem, and in the warp tension adjusting device (3) in the tire cord weaving device (1), the advance of the warp at a position above the sheet-like warp. An urging roller (10a) that extends in a direction perpendicular to the direction and is movable in the vertical direction, the urging roller (10a) provided so that its own weight and the tension of the warp are balanced , A biasing device (11) including a fluid pressure cylinder (15) for applying a biasing force in a pulling-down direction to the biasing roller (10a) , and the dancer roller (10a) is also used as the biasing roller (10a). along with that the loom tire fabric weaving unit during weaving (4) is stopped, the over a period from the first time of the stop point forward until the restart of at least the loom (4) By actuating the body pressure cylinder (15), said biasing force is exerted by the hydraulic cylinder (15) relative to said biasing roller (10a), in said period of time later, the biasing roller (10a) to The urging force is not applied, and the weight of the urging roller (10a) is balanced with the tension of the warp .

  However, “actuating the fluid pressure cylinder (15)” as used herein refers to supplying pressure fluid to the fluid pressure cylinder (15) so that the urging force in the pulling direction acts on the urging roller (10a). Say.

  Further, the “first time point” here means that the dropper device (8) detects the loosening of the warp yarn accompanying the stop of the loom (4) from the time point when the main controller (not shown) of the loom (4) outputs a stop signal. This is a time point that is arbitrarily set within a period until it is erroneously detected as warp breakage.

  Further, in the warp biasing method, in the process of the downward displacement of the biasing roller (10a) accompanying the operation of the fluid pressure cylinder (15) from the first time point, the biasing roller (10a) The operation of the fluid pressure cylinder (15) may be adjusted so that the displacement speed of the fluid pressure changes in the direction of slowing down.

  When the loom stops during weaving of the suede weaving portion of the tire cord fabric, the present invention provides a fluid flow from the first time after the loom is stopped, particularly during the loom stop period until the loom is restarted. Since the urging force in the pulling direction is continuously applied to the urging roller by the pressure cylinder, the urging roller is not lifted by the warp. Thus, when a dropper device for detecting warp breakage is provided upstream of the urging roller of the warp tension adjusting device, the urging roller is not lifted by the warp and the dropper pin does not descend, It can be prevented that the dropper device erroneously detects warp breakage due to the descending. Therefore, when the loom is restarted, the state where warp breakage is monitored by the dropper device can be maintained, the warp breakage is overlooked, the loom is restarted and the loom stops again, and the accompanying repair work Thus, the loom can be restarted stably without requiring much labor.

  When the weaving machine is restarted after the loom stops, the bobbin's stationary inertia in the creel device and the guide rolls that exist in the warp path from the creel device to the biasing roller, etc. Due to the static frictional force acting on the warp, it takes some time until the warp is actually pulled out of the creel device after the loom is restarted. For this reason, immediately after the loom is restarted, the tension of the warp momentarily increases, and a force in the pulling direction acts on the biasing roller, which may cause a phenomenon that the biasing roller jumps up. When such a biasing roller springs up, the warp tension vibrates due to this, and when the tension is loosened, the dropper pin may drop and come into contact with the contact bar. As a result, the dropper device may output a warp breakage detection signal even though no warp breakage has occurred.

Therefore, it is assumed that the urging force in the direction of pulling down is continuously applied to the urging roller by continuing the operation of the fluid pressure cylinder for at least the period from the first time after the loom stops to the restart of the loom. As a result, it is possible to prevent the urging roller from jumping upward immediately after the loom is restarted. Thereby, vibration of warp tension (loosening of warp) that occurs after restart of the loom is prevented, erroneous detection of warp breakage by the dropper device can be effectively prevented, and restart of the loom can be performed without any trouble. Note that the end point of the period, that is, the second time point, increased when the loom reached the steady operating speed of the suede weaving, immediately after the loom was restarted, due to the action of the stationary inertia of the bobbin of the creel device, etc. What is necessary is just to set at the time of warp tension falling to the warp tension in the steady operation of Sudale weaving, or any time after that time.

  Further, in the case where the urging roller is lowered as described above, if the fluid pressure cylinder suddenly stops at the end of the lowering, the urging roller immediately stops. However, as described above, in the pulling process of the urging roller, the urging roller pulls the warp, and in the creel device, the bobbin rotates as the warp is pulled out by the traction. Even if the power roller stops, the bobbin may not rotate but may continue to rotate due to inertia. In this case, the so-called “warp overrun” state occurs as a result, and the warp may be loosened upstream of the urging roller.

  Therefore, in the process of displacing the urging roller downward, if the operation of the fluid pressure cylinder is adjusted so as to change the displacement speed of the urging roller, particularly in the direction of slowing down, the sudden stop of the urging roller is prevented. It is possible to prevent warp overrun due to sudden stop. As a result, the warp yarn can be prevented from loosening upstream of the biasing roller when the biasing roller is stopped, and the dropper pin does not descend due to the loosening of the warp yarn. It is possible to prevent erroneous detection of cutting and to stably restart the loom.

1 is a cross-sectional side view showing an outline of a tire cord weaving apparatus 1 of the present invention. It is a cross-sectional side view of the warp tension adjusting device. 4 is a cross-sectional view taken along a line connecting rotation centers of members of the operation transmission mechanism 12. FIG. 4 is a plan view of the engaging member 21 and the fluid pressure cylinder 15. FIG. 3 is a fluid pressure circuit for explaining a fluid supply device 13 of the warp tension adjusting device 3. 3 is a fluid pressure circuit for explaining a fluid supply device 13 of the warp tension adjusting device 3. 3 is a time chart showing the operation of the warp tension adjusting device 3. 2 is a fluid pressure circuit for explaining a fluid supply device 14 of the warp tension adjusting device 3. 2 is a fluid pressure circuit for explaining a fluid supply device 14 of the warp tension adjusting device 3. 3 is a fluid pressure circuit for explaining a fluid supply device 60 of the warp tension adjusting device 3. 7 is a fluid pressure circuit for explaining a fluid supply device 67 of the warp tension adjusting device 3. 3 is a fluid pressure circuit for explaining a fluid supply device 73 of the warp tension adjusting device 3. 3 is a time chart showing the operation of the warp tension adjusting device 3. 3 is a time chart showing the operation of the warp tension adjusting device 3. 3 is a fluid pressure circuit for explaining a fluid supply device 76 of the warp tension adjusting device 3. 3 is a schematic diagram showing the arrangement of an urging roller 10a, an operation transmission mechanism 12, and a fluid pressure cylinder 15. FIG. It is a side view which shows the outline of the conventional tire cord weaving apparatus 91. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows an embodiment of a tire cord weaving apparatus 1 to which the warp biasing method and apparatus of the present invention are applied. A tire cord weaving apparatus 1 shown in FIG. 1 includes, as main components, a creel device 2 for supplying warp yarns 7, a warp tension adjusting device 3 for adjusting the tension of warp yarns 7, a loom 4 for weaving, and a woven tire cord. A separate winding device 5 for winding the fabric is provided.

  A large number of pegs (not shown) are provided in a multi-stage and multi-row shape on the creel device 2, and a large number of bobbins 2a are arranged in order on these pegs. The warp yarns 7 are drawn simultaneously from a large number of bobbins 2 a on the creel device 2 and guided to the loom 4.

  The warp 7 is sandwiched between the nip type roll 4b and the feed roll 4c of the feeding device 4a included in the loom 4, and is pulled from the multiple bobbins 2a of the creel device 2 by being pulled by the rotationally driven feed roll 4c. Although the tension of each warp 7 pulled out from each of a large number of bobbins 2a is different, the warp tension adjusting device 3 installed between the creel device 2 and the loom 4 is pulled out from the creel device 2. The warps 7 are aligned in a horizontal row to form a sheet, and the tension of each warp 7 is made substantially uniform.

  Next, the configuration of the warp tension adjusting device 3 of this embodiment will be described. In the following description, the creel device 2 side in the warp traveling direction is the upstream side, and the separate winding device 5 side is the downstream side. In addition, an axial direction of a dancer roller, which will be described later, is referred to as a “width direction”, and a direction perpendicular to the axis of the dancer roller is referred to as an “orthogonal direction”.

  The frame of the warp tension adjusting device 3 has a structure in which a pair of plate-like frames 6 are arranged in parallel at positions separated from each other in the width direction, and these are connected by a plurality of beams 6c. FIG. 2 shows a state in which the warp tension adjusting device 3 is cut between the pair of frames 6 at a vertical cross section parallel to the warp traveling direction. Therefore, in FIG. The state seen from the inside of the frame 6 is shown. Each frame 6 includes a first frame 6a on the creel device 2 side and a second frame 6b on the loom 4 side.

  Between the pair of frames 6, along the path of the warp 7, two lead rods 35, a dropper device 8, four guide rolls 36 a, 36 b, 36 c, 36 d, Two dancer rollers arranged alternately with the three guide rolls 36a, 36b, 36c on the upstream side of the guide rolls 36a, 36b, 36c, 36d are provided.

  The two Leeds rods 35 are round bar-like members, and both ends thereof are fixed to the pair of first frames 6a so as not to rotate. These two reelslots 35 are provided for the purpose of winding the warp yarns 7 and extend in the horizontal direction with their axes parallel to each other at a position intersecting with the warp yarn path. Exist. A large number of warps 7 supplied from the creel device 2 are passed through the top and bottom of the two lead rods 35 alternately so that the paths of the adjacent warps 7 intersect each other so that the arrangement of the warps 7 does not cross. Be organized. The number and interval of the lead rods 35 are changed as necessary for the purpose of changing the frictional resistance of the warp 7.

  Four guide rolls (referred to as first, second, third, and fourth guide rolls 36a, 36b, 36c, and 36d in order from the upstream side) are rotatably supported by a pair of second frames 6b. These extend in the horizontal direction between the pair of second frames 6b in a state where their axes are parallel to each other. The first, second, and third three guide rolls 36a, 36b, and 36c are disposed on both sides of a dancer roller, which will be described later, in the path of the warp 7 on the downstream side of the Leeds rod 35. It is provided for the purpose of supporting the warp yarn 7 which is pulled down under the action of its own weight on both sides of the dancer roller. The fourth guide roll 36d is disposed below the third guide roll 36c, and is used to turn the path of the warp yarn 7 wound around the third guide roll 36c and guided downward to the loom 4 side. Is provided.

  The dropper device 8 is disposed between the lead rod 35 of the second frame 6b and the first guide roll 36a, and comes into contact with the dropper pins 8a and a number of dropper pins 8a suspended from the warps 7. And a contact bar (electrode) 8b for detecting warp breakage. The dropper device 8 is provided for the purpose of detecting warp breakage. When the warp 7 breaks and the tension of the warp 7 disappears, the dropper pin 8a falls and contacts the contact bar 8b. . The dropper device 8 detects warp breakage by energization caused by contact between the dropper pin 8a and the contact bar 8b, and outputs a yarn breakage detection signal to a main controller (not shown) of the loom 4.

  Next, the urging roller, the operation transmission mechanism, and the urging device, which are characteristic invention specific matters of the present invention, will be described.

[Energizing roller]
The two dancer rollers, that is, the first dancer roller 10a and the second dancer roller 10b are provided in a state of being placed on a sheet-like warp row. As described above, in the present embodiment, the first dancer roller 10a is located between the first guide roll 36a and the second guide roll 36b, and the second dancer roller 10b is connected to the second guide roll 36b. It is located between the third guide roll 36c. These dancer rollers are provided for the purpose of making the tension of each warp 7 uniform and keeping it within a certain range by applying its own weight to the warp 7, and maintaining the balance between its own weight and the warp tension. As shown, it moves up and down as the warp tension changes.

  In this embodiment, of the two dancer rollers, the first dancer roller 10a on the side close to the creel device 2 is also used as the urging roller of the present invention. For this reason, the warp tension adjusting device 3 includes an operation transmission mechanism 12 and a biasing device 11 described later as a configuration for applying a biasing force in a pulling direction to the first dancer roller 10a as the biasing roller. .

  On the other hand, the second dancer roller 10b mainly absorbs the increase in the path length of the warp yarn 7 caused by the warp yarn 7 being returned to the upstream side of the loom 4 when the loom 4 is reversed for the rewinding operation or the like. It is provided for the purpose of That is, when the loom 4 is reversed, only the first dancer roller 10a may be used to absorb the tension fluctuation of the warp 7 during weaving. However, when the loom 4 is reversed for the rewinding operation or the like. Since the warp yarn 7 is greatly returned to the upstream side of the loom 4, a second dancer roller 10b is further provided in addition to the second dancer roller 10a in order to absorb the large looseness of the warp yarn 7 due to this, and the two dancer rollers 10a, 10b It is possible to cope with the unwinding amount of the warp 7 as described above in cooperation.

(Operation transmission mechanism)
As shown in FIG. 2, the operation transmission mechanism 12 includes, as a main configuration, a pair of first levers 16 connected to both end portions of a first dancer roller 10a as an urging roller so as to be relatively rotatable, and each first lever 16a. And a pair of second levers 18 connected to the lever 16 via a first shaft 17. Further, in this embodiment, the operation transmission mechanism 12 is interposed between the second lever 18 and an air cylinder 15a in the urging device 11 described later, and the thrust of the rod 24 of the air cylinder 15a is transmitted to the second lever. 18 includes a third lever 20 for transmitting to 18 and an engagement member 21 that is attached to the rod 24 of the air cylinder 15 a and engages with the third lever 20. The operation transmission mechanism 12 is provided for the purpose of converting the thrust of the rod 24 of the air cylinder 15a into an urging force for pulling down the first dancer roller 10a and transmitting it to the first dancer roller 10a.

  FIG. 2 shows one first lever 16 of the pair of first levers 16 connected to both ends of the first dancer roller 10a, and the second lever 18 connected thereto. . Further, in this embodiment, since the air cylinder 15a is installed in each of the pair of frames 6, the engaging member 21 attached to the rod 24 of the air cylinder 15a and the third lever 20 engaged therewith are also provided. Although provided for each air cylinder 15a, FIG. 2 shows the engaging member 21 and the third lever 20 related to one air cylinder 15a. Since the operation transmission mechanism 12 of the present embodiment has a symmetrical structure with respect to the weaving width direction, in the following description, the first lever 16 and the first lever 16 connected to one end of the first dancer roller 10a. The second lever 18, the engaging member 21 attached to one air cylinder 15a, and the third lever 20 engaged therewith will be described, and the description of the other first lever 16 and the like will be omitted.

  Further, in this embodiment, since the urging force in the pulling direction acts on the first dancer roller 10a when the rod 24 of the air cylinder 15a is contracted, the direction of contraction of the rod 24 in the air cylinder 15a is shown in FIG. Corresponds to the “operation direction” in the present invention. In the present embodiment, the third lever 20 and the engagement member of the operation transmission mechanism 12 are transmitted so that the thrust of the air cylinder 15a is transmitted to the first dancer roller 10a only when the rod 24 of the air cylinder 15a is contracted. 21 is connected.

  Next, the configuration of each part of the operation transmission mechanism 12 will be described in detail with reference to FIGS. One end of the first lever 16 is connected to the end portion of the first dancer roller 10a, and extends from the end portion in a direction orthogonal to the axial direction of the first dancer roller 10a. As shown in FIG. 3, the one end of the first lever 16 is connected to the end of the first dancer roller 10a via a connecting shaft 38 fitted to a bearing 37 provided at the end of the first dancer roller 10a. It is connected. Therefore, the first lever 16 and the first dancer roller 10a are rotatable relative to each other.

  The connecting shaft 38 passes through the first dancer roller 10a, and both ends thereof are fixed to the one ends of the pair of first levers 16 by a split tightening mechanism. The first shaft 17 is fixed to the other end of the first lever 16 by a split tightening mechanism in a state of extending in parallel with the connecting shaft 38.

  A bearing 40 is fixed to one end of the second lever 18, and the first shaft 17 is fitted to the bearing 40. Therefore, the first lever 16 and the second lever 18 are rotatably connected via the first shaft 17. On the other hand, the second shaft 19 is fixed to the other end of the second lever 18 by, for example, a split tightening mechanism. As shown in FIGS. 2 and 3, the second shaft 19 is paired at both ends with bearings 39 so as to be parallel to the first guide roll 36 a at a position below the first guide roll 36 a. The second frame 6b is rotatably supported. Therefore, the second lever 18 is rotatably supported by the second frame 6b via the second shaft 19 at one end thereof. The second lever 18 is supported by the second frame 6 b via the second shaft 19.

  As shown in FIG. 2, the second shaft 19 is disposed upstream of the first dancer roller 10 a, and the first lever 16 and the second lever 18 are connected via the first shaft 17. In this state, the axis of the first shaft 17 is located at a position excluding a straight line connecting the axis of the second shaft 19 and the axis of the first dancer roller 10a (in the illustrated example, the lower side of the straight line). ), The lengths of the second lever 18 and the first lever 16 are set. That is, the distance between the second shaft 19 and the first dancer roller 10a is the largest (the warp path on which the first dancer roller 10a is placed is the first guide roll 36a and the second guide roll). 36b), the sum of the inter-axis distance between the second shaft 19 and the first shaft 17 and the inter-axis distance between the first shaft 17 and the dancer roller 10a is The length in the longitudinal direction (extending direction) of the first lever 16 and the second lever 18 is set so as to be larger than the distance between the two shafts 19 and the first dancer roller 10a. Thus, the axis of the first shaft 17 inevitably exists at a position excluding a straight line connecting the axis of the second shaft 19 and the axis of the first dancer roller 10a, that is, a position excluding the thought point. Therefore, the first lever 16 and the second lever 18 are always bent downward and convex at the position of the first shaft 17 regardless of the vertical movement of the dancer roller 10a.

  As described above, the second shaft 19 is a through shaft that spans between the pair of second frames 6b supported at both ends by the pair of second frames 6b. One of a pair of second levers 18 is fixed to one end of 19, and the other second lever 18 (not shown) is fixed to the other end. Therefore, the pair of first levers 16 and the pair of second levers 18 are connected by the connecting shaft 38 and the second shaft 19, respectively. Thereby, the urging force acting in the direction of pulling down the first dancer roller 10a is averaged between the pair of first levers 16 so that the force acts equally on both ends of the first dancer roller 10a.

  The third lever 20 is a lever that extends in a direction orthogonal to the axis of the second shaft 19, one end of which is fixed to the second shaft 19, and the second frame is interposed via the second shaft 19. It is supported so as to be rotatable with respect to 6 b and is fixed to the second lever 18 via the second shaft 19. Therefore, when the third lever 20 is rotated about the second shaft 19 by an air cylinder 15a described later, the second shaft 19 rotates about its own axis, and accordingly the second shaft 19 rotates. The lever 18 also rotates together with the third lever 20 around the second shaft 19.

  As shown in FIG. 2, the third lever 20 has a substantially arc shape with a straight line connecting one end and the other end fixed to the second shaft 19 as a string as a shape in the extending direction seen in the width direction. It has a curved shape and is fixed to the second shaft 19 with the arc string facing downstream. An engagement surface 20a is formed on the concave end surface of the arc of the third lever 20, and an engagement roller 44 of the engagement member 21 described later comes into contact with the engagement surface 20a. The rod 24 of the air cylinder 15a and the third lever 20 are connected so as to be able to contact and separate.

  As for the shape of the engagement surface 20a of the third lever 20, the curvature of the arc is such that the angle formed by the third lever 20 and the rod 24 of the air cylinder 15a as the third lever 20 rotates. Even when it changes, the rotation amount of the third lever 20 with respect to the displacement amount of the rod 24 is set to be kept at a substantially constant rotation amount.

  As shown in FIG. 4, the engagement member 21 that engages with the third lever 20 includes a clevis 41 attached to the tip of a rod 24 of an air cylinder 15 a described later, and two engagements attached to the clevis 41. A plate 42, an engagement roller 44 supported by the engagement plate 42 via a support shaft 43, and a pair of rolling rollers 45 are provided. The clevis 41 has a U-shaped opening 41a, and is fixed to the tip of the rod 24 of the air cylinder 15a with the opening 41a facing downstream (in the extending direction of the rod 24 of the air cylinder 15a). Yes.

  One end of each of the two engagement plates 42 is fixed inside the opening 41a of the clevis 41, and the two engagement plates 42 extend in the direction in which the rod 24 of the air cylinder 15a extends (the warp direction). (Parallel direction) extends in parallel with an interval that allows passage of the third lever 20 in the width direction (interval greater than the thickness of the third lever 20). Further, the other end of the two engagement plates 42 is provided so that the support shaft 43 penetrates both the engagement plates 42. The support shaft 43 rotatably supports the engagement roller 44 between the two engagement plates 42, and rotatably supports a pair of rolling rollers 45 outside the two engagement plates 42. Yes. The rolling roller 45 rolls with the expansion and contraction of the rod 24 on the mounting portion 47 of the base member 46 on which an air cylinder 15a described later is mounted. The third lever 20 is inserted between the two engagement plates 42 on the upstream side of the engagement roller 44.

  Due to the connection structure of the third lever 20 and the engaging member 21 as described above, when the rod 24 of the air cylinder 15a is contracted, the engaging member 21 is engaged with the third lever 20 and the third lever 20 is engaged. The lever 20 is pressed, and the third lever is rotated clockwise around the axis of the second shaft 19 together with the second shaft 19 and the second lever 18 in FIG. 2, and the thrust of the air cylinder 15a Is converted into an urging force for pulling down the first dancer roller 10a by the operation transmission mechanism 12, and transmitted to the first dancer roller 10a. On the other hand, the second lever 19 and the third lever 20 fixed to the second shaft 19 rotate clockwise around the axis of the second shaft 19 in FIG. 2 due to the torque of the first dancer roller 10a and the like due to its own weight. The third lever 20 and the engagement member 21 (engagement roller 44) can be separated in the pressing direction. With this structure, the rotation of the third lever 20 due to its own weight, such as the first dancer roller 10a, is not restricted by the engaging member 21, so that the own weight of the first dancer roller 10a is passed through the operation transmission mechanism 12. It is not supported by the rod 24 of the air cylinder 15a.

In addition, the dimension of each member which comprises the action transmission mechanism 12, and the attachment phase of the 2nd lever 18 and the 3rd lever 20 with respect to the 2nd axis | shaft 19 are set so that the following relationship may be satisfy | filled.
When the rod 24 of the air cylinder 15a is positioned at the stroke end in the extending direction (the direction opposite to the contracting direction) and the first dancer roller 10a is positioned at the upper limit of the vertical movement, that is, the warp 7 is the first guide roll. The engaging roller 44 of the engaging member 21 fixed to the rod 24 is more than the engaging surface 20a of the third lever 20 when it is stretched linearly between 36a and the second guide roll 36b. Is also located downstream.

  By setting the dimensions and mounting phases of the members constituting the operation transmission mechanism 12 in this way, when the rod 24 of the air cylinder 15a is positioned at the stroke end in the extending direction, that is, in the non-operating state of the air cylinder, Even if the first dancer roller 10a moves up and down, the third lever 20 and the engaging member 21 do not engage with each other, and the urging device 11 does not prevent the first dancer roller 10a from moving up and down due to the tension variation of the warp yarn 7. . Therefore, at this time, the first dancer roller 10a functions in the same manner as a general dancer roller, for example, the second dancer roller 10b of this embodiment.

  Note that the second dancer roller 10b of this embodiment has the same structure as the first dancer roller 10a, and the support structure of the second dancer roller 10b is from the operation transmission mechanism 12 of the first dancer roller 10a to the third lever. 20, since it is the same as that in which the engaging member 21 is omitted, the description regarding the second dancer roller 10b is omitted.

[Biasing device]
Next, the urging device 11 including the air cylinder 15a and the fluid supply device 13 that operates the air cylinder 15a will be described. In the warp tension adjusting device 3 of the present embodiment, the urging device 11 has two air cylinders 15a installed in each of the pair of frames 6 as the fluid pressure cylinders 15, and each air cylinder 15a is operated. It is connected to a fluid supply device 13 for supplying fluid. In the following description, the urging device 11 will be described focusing on one of the two air cylinders 15a, but the other of the other than the presence or absence of the position detector 22 that detects the position of the rod 24 of the air cylinder 15a. The configuration of the urging device 11 on the air cylinder 15a side is basically the same.

  As shown in FIGS. 2 and 4, the air cylinder 15 a is supported by a swing bracket 48 provided on a base member 46 fixed to the inside of the frame 6, so that the axis of the rod 24 is a warp. The rod 24 is installed so as to be parallel to the direction and to face the downstream side.

  The base member 46 is fixed to the frame 6 so as to straddle the first frame 6 a and the second frame 6 b at a position below the second shaft 19. The base member 46 has a mounting portion 47 that extends inward from the frame 6, and a swing bracket 48 is provided on the mounting portion 47. The mounting portion 47 of the base member 46 has a hole that allows the third lever 20 to pass over the swinging range of the third lever 20 in order to avoid interference with the third lever 20. 49 is formed.

  The swing bracket 48 supports the air cylinder 15a so as to be swingable around the axis parallel to the axis of the first guide roll 36a with respect to the base member 46. As described above, the rolling roller 45 of the engaging member 21 attached to the tip of the rod 24 of the air cylinder 15a rolls on the mounting portion 47 as the rod 24 expands and contracts. The cylinder side is supported by the swing bracket 48, and the rod side is supported by the base member 46 via the engagement member 21.

  Next, a pneumatic circuit of the fluid supply device 13 will be described with reference to FIGS. 5 and 6. 5 and 6 both show a pneumatic circuit relating to the fluid supply device 13 of the present embodiment. Here, FIG. 5 shows the state of the pneumatic circuit of the fluid supply device 13 during weaving of the suede weaving section, and FIG. 6 shows the fluid supply device during the contraction of the rod 24 of the air cylinder 15a after the loom stops. The state of 13 pneumatic circuits is shown.

  The air cylinder 15a is a double-acting air cylinder, and includes a piston 34, a rod 24 connected to the piston 34, a first pressure chamber 25 and a second pressure chamber 26 that apply air pressure to the piston 34. The air supply / exhaust port 25a and the air supply / exhaust port 26a lead to the respective pressure chambers. The first pressure chamber 25 causes air pressure that displaces the rod 24 in the contracting direction to act on the piston 34 by supplying pressurized air from the air supply / exhaust port 25a. On the other hand, the second pressure chamber 26 causes air pressure that displaces the rod 24 in the extending direction to act on the piston 34 by supplying pressurized air from the air supply / exhaust port 26a. When pressurized air is supplied to one of the first pressure chamber 25 and the second pressure chamber 26, the pressurized air is discharged from the intake / exhaust port to the other pressure chamber.

  The fluid supply device 13 that supplies the pressure fluid to the air cylinder 15a is connected to a position detector 22 that detects the position of the rod 24 of the air cylinder 15a and a first pressure chamber 25 of the air cylinder 15a as main components. The first supply / discharge path 27, the second supply / discharge path 28 connected to the second pressure chamber 26, and the path of pressurized air supplied from the fluid supply source 50 are connected to the first supply / discharge path. A first electromagnetic valve 51 that selectively switches to either one of the path 27 and the second supply / discharge path 28, and a control device 23 that controls the supply / discharge of pressurized air to the air cylinder 15a are provided. .

  Further, in this embodiment, the rod 24 is contracted by the operation of the air cylinder 15a in order to change the displacement speed of the rod 24 in the process of displacement of the rod 24 of the air cylinder 15a in the contracting direction (operation direction). In the displacement process in the direction, the discharge amount of the pressure air from the second pressure chamber 26 is changed. As a configuration for that purpose, the second supply / discharge path 28 includes two paths for discharging the pressure air from the second pressure chamber 26, that is, the first fluid channel 28a and the second fluid channel. 28b and a second electromagnetic valve 29 that selectively switches from one of the two fluid flow paths 28a and 28b to the other in accordance with the displacement of the rod 24.

  Here, in this embodiment, the second supply / discharge path 28 corresponds to the “supply / discharge path” in the present invention, and the second electromagnetic valve 29 corresponds to the “switching device” in the present invention.

  The position detector 22 includes a proximity sensor 22a fixedly arranged on the frame 6 side and a sensor plate 22b fixed on the rod 24 side of the air cylinder 15a. As shown in FIG. 4, the sensor plate 22b is a plate-like member, and is fixed to the side surface of the engagement member 21 on the first frame 6a side with a bolt so as to extend in the axial direction of the rod 24. Has been. On the other hand, the proximity sensor 22a is positioned at a height position where the sensor plate 22b can be detected (existing range of the sensor plate 22b in the vertical direction) so as to be positioned between the frame 6 and the sensor plate 22b in the width direction. Is attached to the first frame 6a.

  The bracket 54 is a member having an L-shaped cross section that extends in the axial direction of the rod 24 of the air cylinder 15a. One of the L-shaped surfaces is fixed to the inner side surface of the first frame 6a, and the L-shaped The other surface has a long hole 54a. The proximity sensor 22a is supported by a bolt inserted through the long hole 54a of the bracket 54. Therefore, the attachment position of the proximity sensor 22a can be adjusted in the axial direction of the rod 24 of the air cylinder 15a within the range of the long hole 54a of the bracket 54.

  The position detector 22 outputs a detection signal S2 to the control device 23 when the sensor plate 22b and the proximity sensor 22a face each other with the displacement of the rod 24 of the air cylinder 15a. It should be noted that the generation timing of the detection signal S2 with respect to the displacement of the rod 24 can be adjusted by adjusting the attachment position of the proximity sensor 22a. The adjustment range of the proximity sensor 22a and the extension length of the sensor plate 22b are set in consideration of the following relationship. That is, the proximity sensor 22a does not detect the sensor plate 22b in a state where the rod 24 of the air cylinder 15a is positioned at the stroke end in the extending direction. The proximity sensor 22a detects the sensor plate 22b in the process of displacement of the rod 24 in the contraction direction (operation direction), and thereafter, the proximity sensor 22a is the sensor plate until the rod 24 reaches the stroke end in the contraction direction. Continue to detect 22b. Further, even after the rod 24 reaches the stroke end in the contracting direction, the proximity sensor 22a maintains the state where the sensor plate 22b is detected.

  With the above setting, in the process of displacing the rod 24 of the air cylinder 15a in the operating direction, the proximity sensor 22a starts to detect the sensor plate 22b until the rod 24 of the air cylinder 15a reaches the stroke end in the contracting direction. The proximity sensor 22a continues to detect the sensor plate 22b and continues to output the detection signal to the control device 23.

  As shown in FIGS. 5 and 6, the fluid supply source 50 that supplies the pressure air as the pressure fluid switches expansion and contraction of the air cylinder 15 a via a pressure reducing valve 53 that reduces the pressure of the pressure air to a constant pressure. A first electromagnetic valve 51 is connected. The first solenoid valve 51 includes a first supply / discharge path 27 connected to the first pressure chamber 25 of the air cylinder 15a, and a second connection connected to the second pressure chamber 26 of the air cylinder 15a. A supply / discharge path 28 is connected. The first solenoid valve 51 selectively switches the path of the pressurized air from the fluid supply source 50 to one of the first supply / discharge path 27 and the second supply / discharge path 28. The expansion and contraction of the air cylinder 15a is switched. In the present embodiment, the first solenoid valve 51 uses the first supply / flow path of the pressurized air supplied from the fluid supply source 50 in the excited state (the “ON” state in the time chart of FIG. 7). It is connected to the discharge path 27 and connected to the second supply / discharge path 28 in a non-excited state (a state of “OFF” in the time chart of FIG. 7).

  The second supply / discharge path 28 includes a first fluid channel 28a, a second fluid channel 28b, and a third fluid channel 28c connected to the second pressure chamber 26 of the air cylinder 15a. A second electromagnetic valve 29 as a switching device that selectively switches the path of the pressurized air discharged from the second pressure chamber 26 from one of the first fluid flow path 28a and the second fluid flow path 28b. And.

  The first fluid channel 28 a is used both for discharging the pressure air from the second pressure chamber 26 and for supplying the pressure air to the second pressure chamber 26. The second fluid channel 28 b is for discharging the pressure air from the second pressure chamber 26, and the third fluid channel 28 c is for supplying the pressure air to the second pressure chamber 26. Further, these fluid flow paths are formed as a common flow path at a portion communicating with the port of the first electromagnetic valve 51, and the first fluid flow is closer to the second electromagnetic valve 29 than the first electromagnetic valve 51. The path 28a and the second and third fluid flow paths 28b and 28c are branched and connected to different ports of the second electromagnetic valve 29, respectively. Further, the second and third fluid flow paths 28b and 28c are formed as a common flow path at the portions communicating with the first and second electromagnetic valves 51 and 29, respectively. After branching once on the second electromagnetic valve 29 side, they merge again and are connected to the second electromagnetic valve 29.

  The second fluid channel 28b includes a throttle valve 52 in the channel. The throttle valve 52 is a flow rate control valve that regulates the flow rate of the pressure air that passes through the throttle action. By adjustment, the flow rate of the second fluid flow path 28b in the discharge direction from the second pressure chamber 26 is the first. Is set to be smaller than the flow rate of the fluid flow path 28a.

  The third fluid flow path 28c includes a check valve 52a in the flow path, and the check valve 52a closes the flow path in the discharge direction from the second pressure chamber 26, and It is provided so as to open the flow path in the supply direction to the pressure chamber 26. The third fluid flow path 28c is composed of an air tube having the same diameter as that of the first fluid flow path 28a. Therefore, the flow rate of the pressurized air passing through the third fluid channel 28c is equal to the flow rate of the pressurized air passing through the first fluid channel 28a.

  The second solenoid valve 29 selectively switches the path of the pressurized air discharged from the second pressure chamber 26 to one of the first fluid channel 28a and the second fluid channel 28b. Thus, the displacement speed of the rod 24 is switched in the displacement process of the rod 24 of the air cylinder 15a in the contracting direction (operation direction). In the present embodiment, the second solenoid valve 29 is configured so that the path of the pressure air discharged from the second pressure chamber 26 is in a non-excited state (“OFF” state in the time chart of FIG. 7). Is connected to the second fluid flow path 28b in an excited state ("ON" state in the time chart of FIG. 7).

  The first electromagnetic valve 51 and the second electromagnetic valve 29 are connected to the control device 23. The control device 23 is connected to a main control device (not shown) of the loom 4, and based on the operation signal (start signal, stop signal S1) from the main control device and the detection signal S2 from the position detector 22, As described in the time chart of FIG. 7, the operations of the first solenoid valve 51 and the second solenoid valve 29 are controlled. In this embodiment, the first time point at which the fluid pressure cylinder 15 is operated is the loom stop time point, that is, the time point when the main control device of the loom 4 generates the stop signal S1.

  Next, with reference to the time charts of FIGS. 5, 6, and 7, the operation and the effect of the warp tension adjusting device 3 according to the present embodiment will be described in accordance with the operation status of the loom 4.

[Operation during loom operation]
The time chart of FIG. 7 is a time chart showing the operation of the warp tension adjusting device 3 with respect to the operating state of the loom 4. As shown at the left end of the time chart, during operation of the loom 4, particularly during weaving of the suede weaving section, the control device 23 causes both the first and second electromagnetic valves 51 and 29 to be in a non-excited state ("OFF in FIG. 7" ) State). When both the first and second solenoid valves 51 and 29 are in a non-excited state (OFF), the second supply / discharge path 28 is connected to the fluid supply source 50 as shown in FIG. The supply / discharge path 27 is connected to the discharge port of the first solenoid valve 51. Further, the first fluid passage 28 a is connected to the second pressure chamber 26 by the second electromagnetic valve 29. Therefore, during the loom operation, the pressure air supplied from the fluid supply source 50 is supplied to the second pressure chamber 26 via the first fluid flow path 28a in the air cylinder 15a. As a result, air pressure acts in the extending direction (the left side surface of the piston 34 in FIG. 5) with respect to the piston 34 of the air cylinder 15a, and the rod 24 is positioned at the stroke end in the extending direction.

  As described above, when the rod 24 of the air cylinder 15a is positioned at the stroke end in the extending direction, the third lever 20 and the engagement member 21 do not engage with each other. The vertical movement of the first dancer roller 10a is not restricted. For this reason, during the loom operation, the first dancer roller 10a is placed on the sheet-like warp row without being supported by the operation transmission mechanism 12, and all of its own weight with respect to the warp 7 is obtained. While acting, it moves up and down with the tension fluctuation of the warp 7 so as to maintain the balance between its own weight and the warp tension during weaving. At this time, the first and second levers 16 and 18 in the operation transmission mechanism 12 are hung on the first dancer roller 10a, so that their own weight also acts on the warp 7.

  As a result, during the operation of the loom 4, the first dancer roller 10a of the warp tension adjusting device 3 has its own weight and the tension of the warp 7 in the same manner as the second dancer roller 10b when the tension of the warp 7 changes. It moves up and down so as to maintain the balance, and the tension of the warp 7 is made uniform by its own weight and kept in a certain range.

[Operation from loom stop time (first time) to loom restart time]
During weaving of the suede weaving section during operation of the loom 4, the loom 4 is stopped due to the occurrence of poor weaving or the operator operating the stop button, etc., and the main control device of the loom 4 stops with respect to the control device 23. The signal S1 is output. As illustrated in FIG. 7, the control device 23 that has received the input of the stop signal S <b> 1 puts the first electromagnetic valve 51 into an excited state (an “ON” state in FIG. 7). When the first solenoid valve 51 is switched from the non-excited state (OFF) to the excited state (ON), the first supply / discharge path 28 is connected to the fluid supply source 50, so that The discharge path 27 is switched to the state connected to the fluid supply source 50. The second supply / discharge path 28 is connected to the discharge port of the first electromagnetic valve 51.

  Thereby, the pressure air from the fluid supply source 50 is supplied to the first pressure chamber 25 of the air cylinder 15a through the first supply / discharge path 27 from the loom stop time as the first time point. . As a result, air pressure acts on the piston 34 of the air cylinder 15a in the contracting direction (the right side surface of the piston 34 in FIG. 5), the air cylinder 15a is activated, and the rod 24 is displaced in the contracting direction. Further, the pressure air is discharged from the second pressure chamber 26 to the second supply / discharge path 28 in accordance with the displacement of the rod 24 (piston 34) in the contracting direction. However, since the second solenoid valve 29 is in a non-excited state (OFF) at this time, the pressure air discharged from the second pressure chamber 26 is discharged via the first fluid channel 28a. Is done. In this embodiment, the rod 24 is displaced to the stroke end in the contracting direction.

  As the air cylinder 15a is displaced in the contracting direction of the rod 24, the thrust of the air cylinder 15a is transmitted via the operation transmission mechanism 12 to the first dancer roller 10a that is in its own weight and balances with the tension of the warp 7. The More specifically, the pressure acting on the piston 34 of the air cylinder 15a due to the engagement member 21 coming into contact with the engagement surface 20a of the third lever 20 as the rod 24 of the air cylinder 15a is displaced in the contracting direction. The fluid pressure of air acts on the third lever 20 via the rod 24. As a result, the third lever 20 rotates around the second shaft 19 in the direction of pulling down the first dancer roller 10a (clockwise direction in FIG. 2). The lever 18, the first shaft 17, and the first lever 16 are transmitted in this order, and an urging force in a pulling-down direction acts on the first dancer roller 10 a. As a result, the first dancer roller 10a is displaced at a speed corresponding to the displacement speed of the rod 24 of the air cylinder 15a toward the lower side than the position where the weight of the first dancer roller 10a balances with the tension of the warp 7, and pulls the warp 7. Lengthen the warp path.

  Since the inertial rotation of the bobbin 2a of the creel device 2 gradually converges, the bobbin 2a rotates from the state of rotating by inertia in the course of downward displacement of the first dancer roller 10a. It shifts to the state rotated by traction of 7.

  When the sensor plate 22b attached to the rod 24 is detected by the proximity sensor 22a during the displacement of the air cylinder 15a in the contracting direction of the rod 24, the detection signal S2 is sent from the position detector 22 to the control device 23. Is output. When the control device 23 receives the detection signal S2, the control device 23 turns the second electromagnetic valve 29 into an excited state (ON). That is, the second solenoid valve 29 is brought into an excited state (ON) when the displacement amount of the rod 24 reaches a predetermined amount during the displacement process of the rod 24 in the contracting direction. The position detector 22 maintains the detection signal S2 in an ON state while the proximity sensor 22a detects the sensor plate 22b. Then, as long as the detection signal S2 is ON, the control device 23 maintains the excitation state (ON) of the second electromagnetic valve.

  By switching the second electromagnetic valve 29 from the non-excited state (OFF) to the excited state (ON), the second pressure chamber 26 is connected to the first fluid flow path 28a as shown in FIG. The state is switched to the state connected to the second and third fluid flow path sides 28b and 28c. Since the check valve 52a on the third fluid flow path side 28c is closed when the pressure air flows in the discharge direction from the second pressure chamber 26, the air cylinder 15a starts from when the detection signal S2 is input to the control device 23. The discharge of the pressurized air from the second pressure chamber 26 is performed via the second fluid channel 28b. Thereby, the discharge | emission amount per unit time of the pressure air from the 2nd pressure chamber 26 reduces, and it changes to the direction where the displacement speed of the rod 24 becomes slow.

  As a result, the lowering speed of the first dancer roller 10a is also changed to a slower speed than before according to the change in the displacement speed of the rod 24 in the air cylinder 15a. Accordingly, the pulling speed of the warp 7 pulled by the first dancer roller 10a and pulled out from the creel device 2 is changed to a slower speed than before, and the creel device rotated by pulling out the warp 7 is pulled. 2, the rotation speed of the bobbin 2a is also changed to a low speed. Thereafter, the rod 24 of the air cylinder 15a stops moving when it reaches the stroke end in the contracting direction, and accordingly, the downward movement of the first dancer roller 10a is also stopped.

  Even after the rod 24 of the air cylinder 15a reaches the stroke end in the contracting direction, the control device 23 maintains the air pressure of the fluid supply device 13 so that the pressurized air is supplied to the first pressure chamber 25 of the air cylinder 15a. The circuit state is maintained. As a result, the rod 24 of the air cylinder 15a remains biased in the contraction direction at the stroke end in the contraction direction. Therefore, the first dancer roller 10a is maintained in a state in which the urging force in the pulling-down direction is applied, and the warped yarn 7 is kept in a tension state.

  Thus, during the period from the loom stop time (first time point) to the loom restart time point, the first dancer roller 10a of the warp tension adjusting device 3 is displaced downward and is warped by the first dancer roller 10a. 7 is pulled and the warp path is lengthened, so that the looseness of the warp 7 caused by the inertial rotation of the bobbin 2a in the creel device 2 when the loom 4 is stopped is absorbed.

  In the warp tension adjusting device 3 according to the present invention, the fluid pressure cylinder is maintained during the stop period of the loom 4 until the loom 4 is restarted even after the rod 24 of the air cylinder 15a reaches the stroke end in the contracting direction. 15, the tension force of the warp yarn 7 is kept applied to the first dancer roller 10a, so that the tension state of the warp yarn 7 can be maintained, and the first dancer roller 10a is lifted by the warp yarn from the lowest lowered position. It is prevented that the warp breakage detection signal S1 is output due to erroneous detection in the dropper device 8 upstream of 36a. Therefore, it is not necessary to ignore the warp breakage detection signal in order to restart the loom 4 and the state where warp breakage is monitored by the dropper device 8 can be maintained, so that the warp breakage is overlooked and the loom 4 is overlooked. Is restarted and the loom 4 can be restarted stably without stopping again.

  Further, in the warp tension adjusting device 3 of the present embodiment, the control device 23 determines the displacement speed of the rod 24 in the process of displacement of the air cylinder 15a in the contraction direction of the rod 24, and the stroke end of the rod 24 in the contraction direction. The first dancer roller 10a that pulls down the warp yarn 7 is prevented from suddenly stopping before reaching the speed. Thereby, the overrun of the warp 7 due to the sudden stop of the first dancer roller 10a can be prevented, and the occurrence of loosening of the warp 7 due to the overrun can be prevented.

[Operations from the time when the loom is restarted until the time when the Sudare Weaving reaches the steady operating speed (second time)]
In the tire cord weaving apparatus 1, when restarting the loom 4 that is stopped during weaving of the suede weaving portion, the warp yarn 7 is prevented from being abruptly pulled out of the bobbin 2 a of the creel apparatus 2 and disturbed along with the restart. For this purpose, the loom 4 is started at an arbitrarily set starting spindle speed (for example, 300 rpm), and then accelerated over several picks (for example, about 30 picks, 3 to 5 seconds in time). There is a case where a starting operation is performed so as to reach a steady operation rotational speed (for example, 900 rpm) of the suede weaving. In this embodiment, such a starting operation is also performed.

  In the warp force adjusting device 3, a start signal indicating restart from the main control device of the loom 4 is output to the control device 23 as the loom 4 is restarted. The control device 23 includes a timer (not shown) that operates in response to the activation signal, and when a signal indicating that a preset time has elapsed is output from the timer, the first electromagnetic The valve 51 is turned off (OFF). The time set in advance in the timer is a time corresponding to a period from the restart point of the loom to the second time point after the restart, and the second time point is, in this embodiment, In the above-described start operation, the main shaft rotation speed of the loom 4 reaches the steady operation rotation speed of the suede weaving after restarting. Specifically, about 3 to 5 seconds corresponding to a period in which weaving of about 30 picks is performed from the restart at which the steady rotational speed of the suede weaving reaches 900 rpm is preset in the timer.

  The control device 23 maintains the excitation state (ON) of the first electromagnetic valve 51 until the second time point during operation of the timer. Therefore, the rod 24 of the air cylinder 15a remains biased in the contracting direction at the stroke end in the contracting direction, and the state in which the biasing force in the pulling-down direction acts on the first dancer roller 10a is maintained. Is done. Further, since the detection signal S2 from the position detector 22 remains in the ON state, the second electromagnetic valve 29 is also maintained in the excited state (ON).

  In this way, the urging force in the pulling direction continues to act on the first dancer roller 10a until the second time point after the loom 4 is restarted, so that the urging force on the first dancer roller 10a is released when the loom is restarted. Compared to the case, it is possible to further prevent the first dancer roller 10a from jumping up due to an increase in warp tension that occurs immediately after the loom 4 is restarted. As a result, vibration of the warp 7 that occurs after the loom 4 is restarted can be prevented, and erroneous detection of warp breakage by the dropper device 8 caused by the vibration of the warp 7 can be effectively prevented, and the loom 4 can be restarted without any problem. Is called.

[Operation after the second time point]
When the control device 23 receives a signal indicating that a preset time has elapsed from the timer, the control device 23 turns the first electromagnetic valve 51 into a non-excited state (OFF). Accordingly, the state in which the first supply / discharge path 27 is connected to the fluid supply source 50 is switched to the state in which the second supply / discharge path 28 is connected to the fluid supply source 50. Further, the first supply / discharge path 27 is connected to the discharge port of the first electromagnetic valve 51. Therefore, after the second time point, the pressure air supplied from the fluid supply source 50 is supplied to the second pressure chamber 26 of the air cylinder 15 a via the second supply / discharge path 28.

  As a result, air pressure acts in the extending direction on the piston 34 of the air cylinder 15a, the rod 24 is displaced in the extending direction, and stops at the stroke end. Further, the pressure air is discharged from the first pressure chamber 25 to the first supply / discharge path 27 in accordance with the displacement of the rod 24 (piston 34) in the extending direction. Note that when the pressurized air is supplied to the second pressure chamber 26 via the second and third fluid flow paths 28b and 28c, a throttle valve 52 is provided in the second fluid flow path 28b. On the other hand, the third fluid flow path 28c is provided with a check valve 52a, and this check valve 52a is used when pressurized air flows in the supply direction to the second pressure chamber 26. The flow path resistance is smaller than that of the throttle valve 52. For this reason, the pressurized air from the fluid supply source 50 is supplied to the second pressure chamber 26 mainly through the third fluid flow path 28c.

  In the process of displacement of the rod 24 in the extending direction, the detection signal S2 from the position detector 22 is switched from ON to OFF, whereby the second electromagnetic valve 29 is also switched from the excited state (ON) to the non-excited state (OFF Therefore, the flow path for supplying pressurized air to the second pressure chamber 26 is also switched from the second and third fluid flow paths 28b and 28c to the first fluid flow path 28a. However, as described above, since the flow rate of the pressure fluid passing through the third fluid flow path 28c is the same as the flow rate of the pressure fluid passing through the first fluid flow path 28a, the rod 24 is displaced in the extension direction of the rod 24. The displacement speed of 24 is constant.

  As the rod 24 of the air cylinder 15a is displaced in the extending direction, the urging force in the pulling-down direction by the air cylinder 15a does not act on the first dancer roller 10a, and the first dancer roller 10a has its own weight, It is displaced toward the upper position where the warp tension is balanced.

  As mentioned above, although one Example of this invention was described based on FIGS. 1-7, the embodiment of this invention is not limited to the said one Example, The following modifications can be considered.

[Modification using single acting cylinder as fluid pressure cylinder]
In the embodiment shown in FIGS. 1 to 7, a double-acting air cylinder 15 a is employed as the fluid pressure cylinder 15. Instead, a single-acting cylinder is employed as the fluid pressure cylinder 15. Also good. Thus, the fluid pressure cylinder 15 of the present invention may be either a double-acting type or a single-acting type. For example, in the fluid supply device 14 shown in FIGS. 8 and 9, a single-acting fluid pressure cylinder 15 is employed as the fluid pressure cylinder 15.

  Further, the pressure fluid supplied to the fluid pressure cylinder 15 may be either a compressive pressure fluid such as compressed air or an incompressible pressure fluid such as hydraulic oil. In the example of FIGS. 8 and 9 shown below, hydraulic oil is employed as the pressure fluid supplied to the fluid pressure cylinder 15, and a single-acting hydraulic cylinder 15 b is employed as the fluid pressure cylinder 15. In addition, since parts other than the fluid supply device 14 among the portions constituting the warp tension adjusting device 3 are the same as those in the embodiment shown in FIGS.

  Here, the correspondence relationship between the warp tension adjusting device 3 in the examples of FIGS. 8 and 9 and the invention specific matters of the present invention will be briefly described. 8 and 9, the hydraulic cylinder 15b that operates with the hydraulic pressure of the hydraulic oil corresponds to the fluid pressure cylinder 15 in the urging device 11 of the present invention. Further, in the examples shown in FIGS. 8 and 9, the displacement speed during the lowering of the urging roller 10a is switched during the displacement process, similarly to the embodiment shown in FIGS. The urging device 11 in the example shown in FIGS. 8 and 9 includes a fluid supply device 14 as a configuration for switching the displacement speed of the urging roller 10a.

  Next, the configuration of the fluid supply apparatus 14 of the embodiment shown in FIGS. 8 and 9 will be described. 8 and 9 each show a hydraulic circuit relating to the same fluid supply device 14. FIG. 8 shows a state of the hydraulic circuit of the fluid supply device 14 during weaving of the suede weaving section, and FIG. 9 shows the hydraulic pressure of the fluid supply device 14 during the contraction of the rod 57 of the hydraulic cylinder 15b after the loom stops. The circuit state is shown.

  The hydraulic cylinder 15 b is a single-acting hydraulic cylinder, and includes a piston 34, a rod 57 connected to the piston 34, a pressure chamber 30 that applies hydraulic pressure to the piston 34, and an intake / exhaust port 30 a that communicates with the pressure chamber 30. , And a spring 30b that applies a biasing force to the piston 34 in the extending direction of the rod 57. The hydraulic cylinder 15b causes the piston 34 to act on the piston 34 by contracting the rod 57 by supplying hydraulic oil from the intake / exhaust port 30a. On the other hand, the spring 30b always applies a biasing force in the direction of extending the rod to the piston. When the intake / exhaust port 30a communicates with the hydraulic oil tank 65 for discharging hydraulic oil, the hydraulic oil is discharged from the intake / exhaust port 30a as the piston 34 moves due to the urging force of the spring 30b.

  The fluid supply device 14 that supplies hydraulic oil to the hydraulic cylinder 15b has, as main components, a position detector 22 that detects the position of the rod 57 of the air cylinder 15b, and a supply / supply connected to the pressure chamber 30 of the hydraulic cylinder 15b. The discharge path 32 and a path to the supply / discharge path 32 are selectively switched to one of a path of hydraulic oil supplied from the fluid supply source 58 and a path of hydraulic oil discharged to the hydraulic oil tank 65. 1 and a control device 31 for controlling supply / discharge of hydraulic oil to / from the hydraulic cylinder 15b.

  Further, in the example of FIGS. 8 and 9, in order to change the displacement speed of the rod 57 in the process of displacement of the rod 57 of the hydraulic cylinder 15b in the contracting direction (operation direction), the rod accompanying the operation of the hydraulic cylinder 15b. In the displacement process of 57 in the contracting direction, the amount of hydraulic oil supplied to the pressure chamber 30 is changed. As a configuration for that purpose, the supply / discharge path 32 includes two paths for supplying hydraulic oil to the pressure chamber 30, that is, the first fluid channel 32 a and the second fluid channel 32 b, and the rod 57. A second electromagnetic valve 33 that selectively switches from one of the two fluid flow paths 32a and 32b to the other according to the displacement is provided.

  Here, in the examples of FIGS. 8 and 9, the second electromagnetic valve 33 corresponds to the “switching device” in the present invention. The position detector 22 includes a proximity sensor 22a fixedly arranged on the frame 6 side and a sensor plate 22b fixed on the rod 24 side of the air cylinder 15a, as in the above-described embodiment. When the sensor plate 22b and the proximity sensor 22a face each other with the displacement of the rod 57 of 15b, the detection signal S2 is output to the control device 31.

  In the example of FIGS. 8 and 9, the fluid supply source 58 that supplies hydraulic oil as a pressure fluid switches expansion and contraction of the hydraulic cylinder 15b via a pressure reducing valve 59 that reduces the pressure of the hydraulic oil to a constant pressure. A first electromagnetic valve 55 is connected. The first solenoid valve 55 is connected to a supply / discharge path 32 connected to the pressure chamber 30 of the hydraulic cylinder 15b and a discharge path to the hydraulic oil tank. The first solenoid valve 55 connects the hydraulic oil path from the fluid supply source 58 to the supply / discharge path 32, blocks the hydraulic oil path from the fluid supply source 58, and disconnects the supply / discharge path 32. The expansion and contraction of the hydraulic cylinder 15b is switched by selectively switching to one of the states connected to the discharge path to the hydraulic oil tank. The first solenoid valve 55 connects the path of hydraulic oil supplied from the fluid supply source 58 to the supply / discharge path 32 in an excited state (“ON” state), and is in a non-excited state (“OFF”). In this state, the path of the hydraulic oil supplied from the fluid supply source 58 is interrupted, and the supply / discharge path 32 is connected to the discharge path to the hydraulic oil tank.

  The supply / discharge path 32 is supplied to the first fluid flow path 32 a, the second fluid flow path 32 b and the third fluid flow path 32 c connected to the pressure chamber 30 of the hydraulic cylinder 15 b and the pressure chamber 30. And a second electromagnetic valve 33 as a switching device that selectively switches the hydraulic fluid path from one of the first fluid flow path 32a side and the second fluid flow path 32b side to the other side. .

  The first fluid flow path 32 a is used both for supplying hydraulic oil to the pressure chamber 30 and discharging hydraulic oil from the pressure chamber 30. The second fluid flow path 32 b is for supplying hydraulic oil to the pressure chamber 30, and the third fluid flow path 32 c is for discharging hydraulic oil from the pressure chamber 30. Further, these fluid flow paths are formed as a common flow path at a portion communicating with the suction / exhaust port 30a of the pressure chamber 30, and the first fluid flow path 32a on the second electromagnetic valve 33 side from the intake / exhaust port 30a, The second and third fluid flow paths 32b and 32c are branched and connected to different ports of the second electromagnetic valve 33, respectively. Further, the second and third fluid flow paths 32b and 32c are formed as a common flow path at a portion communicating with the second electromagnetic valve 33, and once on the second electromagnetic valve 33 side from the intake exhaust port 30a. After branching, they merge again and are connected to the second solenoid valve 33.

  The second fluid channel 32b includes a throttle valve 56 in the channel. The throttle valve 56 is a flow rate control valve that regulates the flow rate of the hydraulic oil that passes through the throttle action. By adjustment, the flow rate of the second fluid flow path 32b in the supply direction to the pressure chamber 30 is the first fluid flow. It is set to be smaller than the flow rate of the path 32a.

  Further, the third fluid flow path 32 c includes a check valve 56 a in the flow path, and the check valve 56 a closes the flow path in the supply direction to the pressure chamber 30 and discharges from the pressure chamber 30. It is provided to open the flow path in the direction. The third fluid channel 32c is composed of a hydraulic pipe having the same diameter as that of the first fluid channel 32a. Accordingly, the flow rate of the hydraulic oil passing through the third fluid flow path 30c is equal to the flow rate of the hydraulic oil passing through the first fluid flow path 32a.

  The second solenoid valve 33 is connected to the port of the first solenoid valve, and the path of the hydraulic oil supplied from the first solenoid valve is connected to the first fluid channel 32a side and the second fluid channel. By selectively switching to either one of the 32b side, the displacement speed of the rod 57 is switched in the process of displacement of the rod 57 of the hydraulic cylinder 15b in the contracting direction (operation direction). In the example of FIGS. 8 and 9, the second electromagnetic valve 33 is configured so that the path of the hydraulic oil supplied to the pressure chamber 30 is in a non-excited state (“OFF” state). To the second fluid flow path 32b side in an excited state ("ON" state).

  The first electromagnetic valve 55 and the second electromagnetic valve 33 are connected to the control device 31. The control device 31 is connected to a main control device (not shown) of the loom 4, and based on the operation signal (start signal, stop signal S1) from the main control device and the detection signal S2 from the position detector 22, The operation of the first solenoid valve 55 and the second solenoid valve 33 is controlled.

  In the fluid supply device 14 as described above, when the control device 31 controls the first electromagnetic valve 55 and the second electromagnetic valve 33 according to the time chart shown in FIG. The operations of the hydraulic cylinder 15b and the first dancer roller 10a are as follows. In this case, in FIG. 7, the first solenoid valve 51, the second solenoid valve 29, and the air cylinder 15a are the first solenoid valve 55, the second solenoid valve 33, and the hydraulic cylinder 15b, respectively. And

  During operation of the loom 4, the first solenoid valve 55 and the second solenoid valve 33 are in a non-excited state (OFF), and the rod 57 of the hydraulic cylinder 15b is biased in the extending direction by the biasing force of the spring 30b. It is stationary at the stroke end in the extension direction. Therefore, the engagement member 21 and the third lever 20 are not engaged, and the first dancer roller 10 a is not restricted in the vertical movement by the biasing device 11. Therefore, the first dancer roller 10a moves up and down so as to maintain a balance between its own weight and the tension of the warp 7 to equalize the tension of the warp 7 and keep it within a certain range.

  When the loom 4 stops, the main control device of the loom 4 (not shown) outputs a stop signal S1 to the control device 31, and the control device 31 receiving the input of the stop signal S1 energizes the first electromagnetic valve 55. Switch to (ON). Thereby, the supply / discharge path 32 switches the path of the working fluid from the fluid supply source 58 from the blocked state to the connected state.

  Thereby, the hydraulic fluid from the fluid supply source 58 is supplied to the pressure chamber 30 of the hydraulic cylinder 15b via the supply / discharge path 32 from the loom stop time as the first time point. As a result, hydraulic pressure acts on the piston 34 of the hydraulic cylinder 15b, the hydraulic cylinder 15b is activated, and the rod 57 is displaced in the contracting direction. At this time, since the second electromagnetic valve 33 is in a non-excited state (OFF), the hydraulic oil supplied to the pressure chamber 30 is supplied via the first fluid flow path 32a. 8 and 9, the rod 57 is displaced to the stroke end.

  As the rod 57 is displaced in the contracting direction, the thrust of the hydraulic cylinder 15b is transmitted via the operation transmission mechanism 12 to the first dancer roller 10a that is in its own weight and is in balance with the tension of the warp 7. A biasing force in a pulling-down direction acts on the dancer roller 10a. As a result, the first dancer roller 10a is displaced downward at a speed corresponding to the displacement speed of the rod 57 of the hydraulic cylinder 15a from the position where its own weight balances the tension of the warp 7 and pulls the warp 7. Lengthen the warp path.

  When the proximity sensor 22a of the rod / position detector 22 detects the sensor plate 22b in the downward displacement process of the first dancer roller 10a, that is, in the displacement process of the rod 57 of the hydraulic cylinder 15b in the contracting direction, the proximity sensor 22a The control device 31 that has received the detection signal S2 sets the second electromagnetic valve 33 to the excited state (ON), and supplies the hydraulic fluid to the pressure chamber 30 from the first fluid flow path 32a to the second fluid flow. Switching to the path 32b, the amount of hydraulic oil supplied to the pressure chamber 30 is reduced, and the displacement speed of the rod 57, that is, the downward displacement speed of the first dancer roller 10a is decreased. At this time, the hydraulic circuit related to the fluid supply device 14 is in the state shown in FIG.

  After the rod 57 of the hydraulic cylinder 15b is displaced to the stroke end in the contracting direction, the control device 31 maintains the state of the hydraulic circuit shown in FIG. 9 until the second time after the loom restart time, and the hydraulic cylinder 15b The hydraulic cylinder 15b is continuously operated by continuously applying the hydraulic pressure to the pressure chamber 30. Thereby, the urging | biasing force of the pulling-down direction continues acting on the 1st dancer roller 10a until the 2nd time.

  At the second time point, the control device 31 shuts off the supply of hydraulic oil to the hydraulic cylinder 15b by turning off the first solenoid valve 55 (OFF), and the rod 57 of the hydraulic cylinder 15b is caused by the biasing force of the spring. Displaces in the direction of elongation. When the detection signal S2 of the proximity sensor 22a is turned off during the displacement process of the rod 57 in the extending direction, the control device 31 puts the second electromagnetic valve 33 in a non-excited state (OFF), and the hydraulic oil from the pressure chamber 30 is discharged. The discharge path is switched from the second fluid channel 32b to the first fluid channel 32a. As a result, the fluid supply device 14 returns to the state of the hydraulic circuit shown in FIG. 8, the engagement between the engagement member 21 and the third lever 20 is released, and the first dancer roller 10a takes its own weight as the warp 7 The warp 7 is moved up and down so as to maintain a balance with the tension, and the tension of the warp 7 is made uniform by its own weight and kept in a certain range.

  The effects of the operation of the fluid supply device 14 of the embodiment shown in FIGS. 8 and 9 are the same as those of the embodiment shown in FIGS.

[Modified example of solenoid valve as switching device]
In the embodiment shown in FIGS. 5 and 6 and the modifications shown in FIGS. 8 and 9 described above, the first solenoid valve and the second solenoid valve as the switching device are provided as separate solenoid valves. However, it is not limited to this. The first electromagnetic valve and the second electromagnetic valve as the switching device may be provided as an integral electromagnetic valve as the switching device. For example, the fluid supply device 60 of the embodiment shown in FIG. 10 is replaced with two solenoid valves in the fluid supply device 14 shown in FIGS. 8 and 9, that is, the first solenoid valve 55 and the second solenoid valve 33. One electromagnetic valve 61 as a switching device is provided. The hydraulic cylinder 15 b is connected to a fluid supply source 58 via a supply / discharge path 63. A relief valve 62 for adjusting the hydraulic pressure is connected downstream of the fluid supply device 58. The supply / discharge path 63 includes a first fluid channel 63a, a second fluid channel 63b to which the throttle valve 64 is attached, and one of the first fluid channel 63a and the second fluid channel 63b to the other. And a solenoid valve 61 serving as a switching device for switching to.

  The solenoid valve 61 is a double solenoid type three-position solenoid valve, which connects the fluid supply source 58 and the first fluid flow path 63a in the first excitation state, and connects the fluid supply source 58 in the second excitation state. The second fluid flow path 63b is connected, the hydraulic oil tank 65 and the first fluid flow path 63a are connected in a non-excited state, and the connection between the fluid supply source 58 and the hydraulic cylinder 15b is cut off. Has been. FIG. 10 shows the state of the hydraulic circuit of the fluid supply device 60 during weaving of the suede weaving section, the solenoid valve 61 is in a non-excited state, and the rod 57 of the hydraulic cylinder 15b is at the stroke end in the extending direction. The third lever 20 and the engaging member 21 do not engage with each other, and the first dancer roller 10a is in a state where it can freely move up and down according to the tension fluctuation of the warp yarn 7.

  When the loom 4 stops, the main control device (not shown) of the loom 4 outputs a stop signal S1 to the control device 66. The control device 66 sets the electromagnetic valve 61 to the first excitation state, and the supply / discharge path 63 Hydraulic fluid is supplied to the pressure chamber 30 of the hydraulic cylinder 15b through the first fluid channel 63a. As a result, the rod 57 of the hydraulic cylinder 15b is displaced in the contracting direction, the engagement member 21 and the third lever 20 are engaged, and the first transmission via the operation transmission member 12 such as the second shaft 19 is performed. A biasing force in a pulling-down direction is applied to the dancer roller 10a. The first dancer roller 10a is displaced downward while pulling the warp 7.

  When the proximity sensor 22a of the position detector 22 detects the sensor plate 22b during the downward displacement process of the first dancer roller 10a, that is, during the contraction of the rod 57 of the hydraulic cylinder 15b, the detection signal S2 of the proximity sensor 22a is received. The control device 66 puts the electromagnetic valve 61 into the second excitation state, switches the hydraulic oil supply path to the pressure chamber 30 from the first fluid flow path 63a to the second fluid flow path 63b, and enters the pressure chamber 30. By reducing the amount of hydraulic oil supplied, the downward displacement speed of the first dancer roller 10a is reduced.

[Modification regarding first time point]
In the embodiment described above, the first time point at which the fluid pressure cylinder 15 is actuated is the loom stop time point, that is, the time point when the main control device of the loom 4 generates the stop signal S1. The time is not limited to the loom stop time. The first time point may be within a period from the time when the stop signal S1 is generated until the dropper device 8 erroneously detects looseness of the warp due to the stop of the loom 4 as warp breakage. It can be arbitrarily set in.

  In addition, when the time point after the loom stop time is set as the first time point, for example, the control devices 23, 31, 66 are provided with a timer for the first time point that operates in response to the stop signal S1, A time corresponding to the period from the loom stop time to the first time point is set in advance in the timer, and the control device that receives the signal from the timer indicating that the set time has elapsed activates the air cylinder. (The first electromagnetic valves 51, 55, 61 may be in an excited state).

[Modification regarding second time point]
In the embodiment described above, the control devices 23, 31, 66 that control the operation of the fluid pressure cylinder 15 include a timer, and the control device itself has a period from the loom restart point to the second point (the loom restart point). However, the device for monitoring the passage of the period is not limited to the control device. For example, it is assumed that the main control device of the loom 4 monitors the progress of the period up to the second time point, and when the second time point is reached, the main control device of the loom 4 to the control device 23 of the warp tension adjusting device 3, A signal is output to 31, 66, and the control devices 23, 31, 66 receiving the signal may operate the fluid pressure cylinder 15 in the direction opposite to the operation direction to release the urging force on the first dancer roller 10a. . In this case, the timer provided in the control devices 23, 31, 66 is omitted.

  For example, the following configuration may be considered for monitoring the progress of the period from the loom restart time to the second time by the main control device of the loom 4. A time corresponding to the period from the loom restart time to the second time point is set in advance in the timer provided in the main control device of the loom 4, and after the loom restarts, the timer has reached the second time point. When the signal is issued, the main control device of the loom 4 outputs a signal for operating the fluid pressure cylinder 15 in the direction opposite to the operation direction to the control devices 23, 31, 66 of the warp tension adjusting device 3, Upon receiving the signal, the control devices 23, 31, 66 operate the fluid pressure cylinder 15 in the direction opposite to the operation direction to release the urging force on the first dancer roller 10 a.

  Alternatively, the main control device of the loom 4 may monitor the progress of the period from the loom restart time to the second time based on the main shaft rotation speed of the loom 4. For example, by a signal from an encoder that detects the rotational speed of the main shaft (not shown), after the loom restarts, it is understood that the main shaft rotational speed has reached the second time point when it reaches the steady operating rotational speed of the suede weaving, At the time of grasping, the main control device of the loom 4 outputs a signal for operating the fluid pressure cylinder 15 in the direction opposite to the operation direction to the control devices 23, 31, 66 of the warp tension adjusting device 3. The urging force against the dancer roller 10a may be released.

  Further, in the embodiment described above, the operation of the fluid pressure cylinder 15 is continued until the second time point after the loom restart, but at the same time as the loom restart, the fluid pressure cylinder 15 is reversed to the operation direction. The urging force on the first dancer roller 10a may be released by operating in the direction. In this case, the timer is omitted. In addition, grasping of the loom restart by the control devices 23, 31, 66 of the warp tension adjusting device 3 is performed from the main control device of the loom 4 to the control devices 23, 31, A signal indicating that the loom is restarted may be output to 66.

[Modification regarding downward displacement of urging roller]
In the embodiment described above, in the downward displacement process of the first dancer roller 10a as the urging roller from the first time point, the urging force is changed by changing the displacement speed of the rods 24 and 57 in the fluid pressure cylinder 15. Although the downward displacement speed of the roller is changed, in the present invention, it is not essential to change the downward displacement speed of the urging roller, and the downward displacement of the urging roller is at a constant speed. It may be performed. In this case, for example, in the embodiment shown in FIGS. 1 to 7, the second electromagnetic valve 29 and the second and third fluid flow paths 28b and 28c in the second supply / discharge path 28 are omitted. Is possible. In the embodiment shown in FIGS. 8 and 9, the second electromagnetic valve 33 and the second fluid flow path 32b in the supply / discharge path 32 can be omitted.

  Further, instead of changing the displacement speed in one step as in the embodiment described above, the displacement speed may be changed step by step to a slower speed over a plurality of steps, or the displacement speed may be continuously changed. Therefore, it may be changed to a slow speed steplessly.

  For example, instead of the throttle valve 52 of the second fluid flow path 28b of the second supply / discharge path 28 of the embodiment shown in FIGS. 1 to 7, an electric throttle valve is provided, and the control device 23 is electrically operated. The throttle amount of the throttle valve may be controlled to increase according to the displacement of the rod 24, and the flow rate of the pressure fluid passing through the second fluid flow path 28b may be changed stepwise. The flow rate of the pressure fluid passing through the fluid flow path 28b may be continuously changed.

  Further, in the case where the downward displacement speed of the urging roller is gradually changed to a slower speed over a plurality of stages, for example, the fluid supply device 67 may be configured as shown in FIG. The fluid supply device 67 includes a first supply / discharge path 69 and a second supply / discharge path 70, and the second supply / discharge path 70 has a first fluid flow path 70 a and a check valve. Are provided with a plurality of second fluid flow paths 70b, each of which is set to a different flow rate, and a plurality of second electromagnetic valves 71 connected to each fluid flow path. In the downward displacement process of the first dancer roller 10a, the control device 68 sequentially switches the fluid flow path by each electromagnetic valve 71 according to the displacement of the rod 24, and moves downward to the first electromagnetic valve 10a as the urging roller. The displacement speed of is gradually changed. In this case, the position detector 22 of the fluid supply device 67 includes a plurality of proximity sensors 22a in the direction of contraction of the rod 24 of the air cylinder 15a, and the control device 68 uses each of the proximity sensors 22a based on a signal from each proximity sensor 22a. The excitation state of the second solenoid valve 71 is sequentially switched.

  Although not shown, the fluid supply device 67 includes a position detector 22 that includes one proximity sensor 22a and a control device 68 that includes a plurality of timers that operate according to signals from the position detector 22. The device 68 may sequentially switch the excitation states of the second electromagnetic valves 71 based on signals from timers set with a plurality of different switching times.

[Variations regarding supply / discharge routes]
In the embodiment described above, for example, the embodiment shown in FIGS. 1 to 7, a throttle valve 52 is provided in the second fluid flow path 28 b of the second supply / discharge path 28, and the throttle valve 52 is adjusted. Although the flow rate of the second fluid flow path 28b is made smaller than the flow rate of the first fluid flow path 28a, the flow rate adjustment is not limited to that by a throttle valve. For example, the second fluid flow path 28b is configured by a tube (air tube) having a diameter smaller than that of the first fluid flow path 28a without providing the throttle valve 52 in the second fluid flow path 28b. The flow rate of the second fluid channel 28b may be set smaller than the flow rate of the first fluid channel 28a.

  Further, in the embodiment described above, for example, the embodiment shown in FIGS. 1 to 7, a third fluid flow path 28 c including a check valve 52 a is provided in the second supply / discharge path 28, and the pressure is increased. When supplying pressurized air to the chamber 26, the flow rate of pressurized air is not reduced, but when supplying pressurized air to the pressure chamber 26, the flow rate of pressurized air may be reduced. For example, without providing the third flow path 28 c having a check valve in the second supply / discharge path 28, the flow rate is set to be smaller than that of the first fluid flow path 28 a in the supply direction to the pressure chamber 26. The compressed air may be supplied from the second fluid flow path 28b.

  Alternatively, without providing the third flow path 28 c having a check valve in the second supply / discharge path 28, the pressure air is always supplied from the first fluid flow path 28 a in the supply direction to the pressure chamber 26. You may make it do. In this case, the control device 23 switches the second electromagnetic valve 29 to the non-excited state simultaneously with the switching of the first electromagnetic valve 51 to the non-excited state.

  The fluid supply apparatus 73 shown in FIG. 12 omits the third fluid flow path 28c to which the check valve 52a is connected from the fluid supply apparatus 13 shown in FIGS. 5 and 6, and the second supply / discharge path 75. Is constituted by the first fluid channel 75a, the second fluid channel 75b, and the second electromagnetic valve 29. In this case, as shown in the time chart of FIG. 13, the control device 74 keeps the second electromagnetic valve 29 in the excited state (ON) when the first electromagnetic valve 51 is switched to the non-excited state (OFF). When the signal from the position detector 22 is turned OFF, the second electromagnetic valve 29 is switched to a non-excited state (OFF), and a flow path for supplying pressurized air to the second pressure chamber 26 The second fluid channel 75b may be switched to the first fluid channel 75a. In the embodiment shown in FIGS. 12 and 13, the rod 24 of the air cylinder 15a is displaced from the slow speed to the fast speed after the signal from the position detector 22 is turned off during the displacement process in the extending direction. To change.

  Alternatively, as shown in the time chart shown in FIG. 14, after the second solenoid valve 29 is once switched to the non-excitation state (OFF) at the same time as the first solenoid valve 51 is switched to the non-excitation state (OFF), Further, for example, based on a signal from the position detector 22, the control device 74 switches the second electromagnetic valve 29 to the excited state (ON) again, and the displacement speed is reduced in the displacement process in the extending direction of the rod 24. The first dancer roller 10a as the urging roller may be prevented from jumping upward by being changed. Then, after the displacement of the rod 24 to the stroke end in the extending direction is completed, the control device 74 performs the second operation based on the signal from the timer that has been operating since the signal of the position detector 22 is turned off. The solenoid valve 29 is switched to a non-excitation state (ON). The timer is provided in either the control device 74 or the main control device of the loom 4.

  The fluid supply device 76 shown in FIG. 15 omits the third fluid flow path 32c to which the check valve is connected from the fluid supply device 14 shown in FIGS. The flow path 78a, the second fluid flow path 78b, and the second electromagnetic valve 33 are configured. Considering the case where the control device 77 controls the first solenoid valve 55 and the second solenoid valve 33 according to the time chart shown in FIG. 7, for example, the rod 57 of the hydraulic cylinder 15b is displaced in the contracting direction. The displacement speed changes from a fast speed to a slow speed, and the displacement speed returns from a slow speed to a fast speed in the displacement process in the elongation direction. In this case, in FIG. 7, the first solenoid valve 51, the second solenoid valve 29, and the air cylinder 15a are the first solenoid valve 55, the second solenoid valve 33, and the hydraulic cylinder 15b, respectively. And

  In the embodiment described above, for example, in the embodiment shown in FIGS. 5 and 6, the supply / discharge path 28 is divided into two flow paths (first fluid flow path 28a and second fluid flow path 28b having different flow rates). And the two flow paths are switched by the second electromagnetic valve 29 to change the supply amount or discharge amount of the pressure fluid to the fluid pressure cylinder 15 so that the displacement speed of the fluid pressure cylinder 15, that is, the urging roller However, for example, the second supply / discharge path is constituted by one fluid flow path, and an electric motor as a switching device is provided in one fluid flow path. The throttle valve may be provided, and the control device may control the electric throttle valve based on the signal from the position detector to increase or decrease the supply amount or discharge amount of the pressure fluid to the fluid pressure cylinder 15.

[Variation of fluid pressure cylinder arrangement]
In the embodiment described above, for example, the embodiment shown in FIGS. 1 to 7, the air cylinder 15 a as the fluid pressure cylinder 15 is provided in each of the pair of frames 6, but this is not restrictive. For example, in the embodiment shown in FIGS. 1 to 7, only one fluid pressure cylinder 15 is provided, and the first dancer roller 10 a is connected to the first dancer roller 10 a through a second shaft 19 spanned between the pair of frames 6. An urging force in a pulling down direction may be applied. When only one fluid pressure cylinder 15 is provided, the fluid pressure cylinder 15 in the width direction may be arranged at an arbitrary position between the pair of frames 6 or any one of the pair of frames 6. It may be arranged on the side.

  In the embodiment shown in FIG. 1 to FIG. 7, the arrangement of the fluid pressure cylinder 15 in the orthogonal direction is upstream and below the second shaft 19, and the third lever 20 is below the second shaft 19. The end face on the downstream side of both end faces facing the rotation direction at the position is configured to be pressed by the engaging member 21, but not limited to this, for example, FIG. 16 (b) to FIG. 16 (d). It is good also as arrangement | positioning described in. Note that FIG. 1A schematically shows the arrangement of the fluid pressure cylinder 15 in the embodiment shown in FIGS.

  FIG. 16B shows that the fluid pressure cylinder 15 is disposed upstream and above the second shaft 19, and the third lever 20 is positioned upstream from the second shaft 19, and the upstream end surface. The structure pressed by the engaging member 12 is shown. In this configuration, the operating direction of the fluid pressure cylinder 15 is the extending direction. In FIG. 16C, the fluid pressure cylinder 15 is disposed downstream and below the second shaft 19, and the third lever 20 has a downstream end surface at a position below the second shaft 19. The structure pressed by the engaging member 21 is shown. In this configuration, the operating direction of the fluid pressure cylinder 15 is the extending direction. In FIG. 16D, the fluid pressure cylinder 15 is disposed downstream and above the second shaft 19, and the third lever 20 has an upstream end surface at a position above the second shaft 19. The structure pressed by the engaging member 21 is shown. In this configuration, the operation direction of the fluid pressure cylinder 15 is the contraction direction.

  In the embodiment described above, the first shaft 17 is provided as a separate member from the first lever 16, but the first shaft 17 is integrally formed so as to project from the first lever 16. You may provide as an axial part made. In addition, the first shaft 17 is provided in each of the pair of first levers 16. For example, the first shaft 17 is provided as a through shaft spanned between the pair of first levers 16. The biasing force acting in the direction of pulling down the first dancer roller 10 a by the first shaft 17 may be averaged between the pair of first levers 16. Further, in the embodiment described above, the second shaft 19 is a through shaft spanned between the pair of frames 6, but the second shaft 19 is not used as a through shaft, and the pair of frames 6 is used. You may provide for each of these.

  In the embodiment described above, the connecting shaft 38 is a through shaft whose both ends are fixed to the pair of first levers 16. For example, the connecting shaft 38 is not used as a through shaft but a pair of first shafts. Each of the levers 16 may be provided. Further, at that time, the connecting shaft 38 may be provided as a shaft portion formed integrally with the first shaft 17 protruding from the first lever 16. Alternatively, the connecting shaft 38 may be provided as a shaft portion integrally formed so as to protrude from both end portions in the width direction of the first dancer roller 10a, and the first lever 16 may be connected via a bearing. .

[Modified example of dancer roller]
In the embodiment shown in FIGS. 1 to 7, the second dancer roller 10b is provided mainly for the purpose of absorbing the looseness of the warp 7 caused by the rewinding operation or the like, but the second dancer roller 10b is not essential. The warp tension adjusting device 3 may not include the second dancer roller 10b. Further, in the case where the warp tension adjusting device 3 includes the second dancer roller 10b as in the embodiment shown in FIGS. 1 to 7, as shown in FIG. 16 (f), the first dancer roller 10a is similar to the first dancer roller 10a. The urging device 11 may be connected to the second dancer roller 10b and the second dancer roller 10b may be operated similarly to the first dancer roller 10a when the loom 4 is stopped.

DESCRIPTION OF SYMBOLS 1 Tire cord weaving device 2 Creel device 2a Bobbin 3 Warp tension adjusting device 4 Loom 4a Feeding device 4b Nip-type roll 4c Feed roll 5 Separate winding device 6 Frame 6a First frame 6b Second frame 6c Beam 7 Warp 8 Dropper Device 8a Dropper pin 8b Contact bar 10a First dancer roller 10b as an urging roller Second dancer roller 11 Energizing device 12 Actuation transmission mechanism 13 Fluid supply device 14 Fluid supply device 15 Fluid pressure cylinder 15a Air cylinder 15b Hydraulic cylinder 16 First Lever 17 First shaft 18 Second lever 19 Second shaft 20 Third lever 20a Engaging surface 21 Engaging member 22 Position detector 22a Proximity sensor 22b Sensor plate 23 Controller 24 Rod 25 First pressure Chamber 25a Supply / exhaust port 26 Second pressure chamber 26a Supply / exhaust port 27 First supply / discharge path 28 Second supply / discharge path 28a First fluid flow path 28b Second fluid flow path 28c Third fluid flow path 29 Switching device Second electromagnetic valve 30 as pressure chamber 30a intake / exhaust port 30b spring 31 control device 32 supply / discharge path 32a first fluid channel 32b second fluid channel 32c third fluid channel 33 Second solenoid valve 34 Piston 35 Reed rod 36a First guide roll 36b Second guide roll 36c Third guide roll 36d Fourth guide roll 37 Bearing 38 Connection shaft 39 Bearing 40 Bearing 41 Clevis 41a Opening 42 Engagement Plate 43 Support shaft 44 Rolling roller 45 Rolling roller 46 Base member 47 Mounting portion 48 Swing bracket 49 Hole 50 Fluid supply source DESCRIPTION OF SYMBOLS 1 1st solenoid valve 52 Throttle valve 52a Check valve 53 Pressure reducing valve 54 Bracket 54a Long hole 55 1st solenoid valve 56 Throttle valve 56a Check valve 57 Rod 58 Fluid supply source 59 Pressure reducing valve 60 Fluid supply device 61 Switching device Solenoid valve 62 Relief valve 63 Supply / discharge path 63a First fluid flow path 63b Second fluid flow path 64 Throttle valve 65 Hydraulic oil tank 66 Control device 67 Fluid supply device 68 Control device 70 Second supply / discharge Path 70a First fluid channel 70b Second fluid channel 71 Second electromagnetic valve 72 as switching device Throttle valve 73 with check valve Fluid supply device 74 Controller 75 Second supply / discharge channel 75a First One fluid channel 75b Second fluid channel 76 Fluid supply device 77 Control device 78 Supply / discharge channel 78a First fluid channel 78b Second fluid channel 79 Throttle valve 91 Tire Over de weaving device 92 warp tension adjuster 93 dancer roller 94 dropper device 95 guide rolls S1 stop signal S2 detected signal

Claims (2)

A tire cord weaving apparatus (1) for weaving a tire cord fabric including a suede weaving portion and a tabby portion,
A creel device (2) for supplying warps;
A dancer roller (10a, 10b) for equalizing the tension of a large number of warps drawn from the creel device (2), and a warp breakage detection device arranged upstream of the dancer rollers (10a, 10b). A warp tension adjusting device (3) including a dropper device (8) of
A loom (4) for weaving a tire cord fabric with the warp supplied via the warp tension adjusting device (3);
In the warp tension adjusting device (3) in the tire cord weaving device (1) including:
An urging roller (10a) that extends in a direction perpendicular to the warp traveling direction at the upper position of the sheet-like warp and is provided so as to be movable in the vertical direction, provided so that its own weight and the warp tension are balanced. Biased roller (10a) ,
A biasing device (11) including a fluid pressure cylinder (15) for applying a biasing force in a pulling-down direction to the biasing roller (10a);
With
The dancer roller (10a) is also used as an urging roller (10a).
With that said loom tire fabric weaving unit during weaving (4) is stopped, the fluid pressure cylinder (15 over a period from a first time point of the stop point forward until at least the restart of the loom (4) ), The urging force is applied to the urging roller (10a) by the fluid pressure cylinder (15) ,
After the period, the urging force does not act on the urging roller (10a), and the weight of the urging roller (10a) and the tension of the warp are balanced. A warp urging method in a warp tension adjusting device of a tire cord weaving device. In the process of downward displacement of the urging roller (10a) accompanying the operation of the fluid pressure cylinder (15) from the first time point, the displacement speed of the urging roller (10a) changes in the direction of slowing down. the fluid pressure cylinder (15) biasing method with warp in the warp tension adjusting device of the tire cord weaving device according to claim 1, wherein the adjusting the operation of to.

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