JPS632463Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a fluid jet type weft storage device for a loom.More specifically, among the types of weft yarn storage devices for wefts that are wound around a drum, this invention is particularly designed to keep the winding drum (thread winding section) stationary. The present invention relates to a weft storage device in which a weft yarn is wound around a winding drum and stored by relatively rotating a winding yarn guide around the outer periphery of the drum.

Generally, in this type of weft storage device, the weft for one pick, that is, the weft for one pick, is wound around the storage drum multiple times at predetermined intervals, and as the weft is inserted, the weft for one pick is sequentially wound around the shaft. A mechanism for transferring in the direction (drawer side) is provided.

By the way, when weaving by changing the width of the fabric, it is necessary to change the length of the weft yarn accordingly. When changing the weft length for this one-koshi portion,
It is necessary to change the storage length of the weft yarn, that is, the amount of winding on the winding drum. In the case of a drum storage type storage device, changing the number of windings can be considered to change the amount of winding, but if changing the number of windings it is not possible to obtain the appropriate length equivalent to the one-koshi portion. There is. Therefore, if you change the diameter of the drum around which the weft is wound by changing the diameter of the drum around which the weft is wound in combination with changing the number of windings, it is possible to obtain the appropriate amount of ichikoshi that cannot be obtained by changing only the number of windings. length is easily obtained.

In order to meet such demands, for example, as shown in Japanese Patent Application Laid-open No. 55-2595, a stationary thread winding part fixed to the shaft rod is replaced with an adjustable thread winding part whose radius can be adjusted. The yarn guide for thread winding is rotated relative to the thread winding part, the weft is wound and stored in the thread winding part, and the weft coil is wound around the thread winding part at a predetermined position of the fixed winding part. It has been proposed that a weft transfer mechanism is provided to sequentially transfer the weft yarns in the axial direction on the unwinding drawer side.
The device disclosed in JP-A No. 55-2595 allows the circumference of the thread winding part to be freely set by appropriately changing the diameter of only the adjustable winding part of the thread winding part. It is convenient because it is possible to obtain a wrapping amount, that is, one weft storage length.

However, in this type of weft storage device, after the weft transport claw member for transporting the weft wound around the thread winding part and stored in the unwinding and drawing direction sinks into the fixed thread winding part, the main nozzle is activated. When the weft is pulled out by force, since the surface of the winding part is smooth, there is very little pulling resistance, and therefore the unwinding of the weft from the fixed thread winding increases the pulling speed of the main nozzle. As it goes around, a very large balloon will be drawn. By the way, as mentioned above, the thread winding section of this device is composed of a fixed thread winding section and an adjustable thread winding section, and both the fixed thread winding section and the adjustable thread winding section are connected to the same shaft rod. has been done. When using this device to change the yarn winding amount, which is the weft storage amount, only the diameter of the adjustable winding section is changed, so the fixed yarn winding section is fixed to the shaft rod, and the bobbin winding is This is done by changing the diameter of only the adjustable winding part that constitutes about half of the attachment part. For this reason, the axial cross-sectional shape of the bobbin winding section after changing the winding diameter will be approximately circular, and the relative distances between the fixed yarn guide on the main nozzle side and each end of the bobbin winding section will be different. . As a result, the center of the balloon and the fixed yarn guide on the main nozzle side are misaligned, and as mentioned above, the balloon has an unstable shape due to the low pull-out resistance, which causes uneven unwinding tension. , there is a problem that subsequent weft insertion becomes unstable.

This idea was proposed in view of the shortcomings of the conventional weft storage device mentioned above, and even if the winding diameter of the entire thread winding section is changed to increase or decrease the thread winding diameter, the weft yarn wound around the thread winding section is To provide a weft storage device that does not cause uneven unwinding due to the unstable shape of the balloon when the balloon is unwound.

In other words, the gist of this invention is that even if the winding diameter of the weft winding section is increased or decreased, if the center of the balloon deviates from the installation position of the fixed yarn guide on the main nozzle side, the loom While the balloon is being rotated, the weft storage device is appropriately moved to align the center of the balloon with the position of the fixed yarn guide on the main nozzle side.

In the following description, for convenience of explanation, the unwinding side will be referred to as the "front side" and the yarn supplying body side will be referred to as the "rear side".

This invention will be explained in more detail below based on the attached drawings.

That is, as shown in FIG. 1, in the fluid injection type weft storage device for a loom of this invention, a rotating shaft 1 is attached to a drum bracket 50 via a bearing 30, and a drum 3 and a drum circle are attached to the rotating shaft 1. A thread-winding yarn guide 2 is constructed of a plurality of rods 4, 4a to 4f arranged in parallel along the circumferential direction, and is attached so as to rotate at a constant cycle around a stationary thread-winding section. ing.

In the figure, 61 is a driven pulley inserted into the rotating shaft, and B is a belt stretched between the driven pulley 61 and the drive pulley 62 in order to transmit the rotation of the drive pulley 62 to the driven pulley 61. , 63 are idler pulleys for appropriately setting the tension of the belt B (see FIG. 2).

The drum bracket 50 is a frame F.
The mounting portion is also fixed to the frame F with bolts 70.

The dimension in the vertical direction in the figure of the bolt insertion hole 53 formed in the drum bracket 50 for inserting the bolt 70 is such that the bolt 70 is loosened and the drum bracket (to be described later) moves up and down. It requires a certain length.

A bracket jack bolt 80 is attached below the drum bracket 50 and is rotatably screwed into the subframe SF. Then, loosen the bolts 70 that attach the drum bracket 50 to the frame, and remove the bracket bolts 80.
By rotating the drum bracket 50
moves up and down according to the direction of rotation. In the figure, reference numeral 81 screwed onto the bracket jack bolt is a lock nut.

A bearing 3 is installed on the tip side of the rotating shaft 1 (right side in Figure 1).
A head base bracket 15 is attached via 2 and 34. This base bracket 15
A gear that meshes with one end of a gear 26 supported via a bearing 31 is provided at one end (left end in the figure) 15a, and the other end of the gear 26 is connected to the drum bracket. It is meshed with a gear 50a provided at 50. As a result, the head base bracket 15 does not rotate with the rotation of the rotating shaft 1, but remains stationary at the position shown in the figure. This head base bracket 1
A predetermined number of rod bases 1 are placed at predetermined positions of 5.
6, 16a, 16b, 16c and a member 16d corresponding to a rod base are attached, and the rod 4 is detachably attached to the rod base 16. Further, the drum 3 is attached to the member 16d corresponding to the rod base by a set bolt 17 (see FIGS. 3 and 4).

A jack rod 20, which will be described later, is operatively connected to the rod 4 and the drum 3 in the form of a universal joint. Furthermore, as best seen in FIG. 5, a driven bevel gear holding member 29 is attached to this head base bracket 15, and a drive bevel gear holding member 29, which is inserted into the outer periphery of the rotating shaft 1 via the bearing 33, is attached to this head base bracket 15. A driven bevel gear 6 that should mesh with gear 5 is attached. A spline groove is formed on the shaft of the driven bevel gear 6, and a worm 8 attached to the drum 3 via a shifter bracket 21 and a shifter 22 is inserted into the shaft of the driven bevel gear 6 so as to be movable in the spline direction. . Furthermore, a worm wheel 9 having a predetermined diameter is meshed with the worm 8, and the worm wheel 9 carries the weft wound around the thread winding section composed of the drum 3 and the rod 4 onto the thread winding section. A stopper 10 having a claw 14 for sequentially feeding the worm wheel 9 in the unwinding direction is attached via a predetermined attachment member 39 concentrically with the worm wheel 9. Therefore, when the rotating shaft 1 rotates and the yarn guide 2 rotates around the thread winding section to wind the weft yarn around the thread winding section, the rotation of the rotating shaft 1 is caused by the worm through the drive bevel gear 5 and the driven bevel gear 6. 8. When the worm 8 rotates, the stopper 10 rotates via the worm wheel 9 that is engaged with the worm 8, and the pawl 14 moves in the unwinding direction. Then, the weft threads wound a predetermined number of times between the claws 14 can be sequentially sent out to the unwinding side.

Of the rod bases 16, one ends of the first and second rods 4a, 4b are connected to the first rod base 16a, one ends of the third and fourth rods 4c, 4d are connected to the second rod base 16b, and one ends of the third and fourth rods 4c, 4d are connected to the second rod base 16b. The rod base 16c has the fifth and sixth rods 4e and 4f.
One end of each is attached via a predetermined attachment member. One end of the rod base 16 to which these rods 4 are attached and the other end of a jack rod 20, which is rotatably connected to a jack hinge 19 (to be described later), are rotatably connected to a predetermined position of the drum 3. has been done.

Next, the head base bracket 15 has a rotating shaft 1.
A jack base 24 having a stepped through hole formed concentrically with the axis of the jack base 24 is attached. A jack bolt 18 having a flange formed at its base is loosely inserted into the stepped through hole so as to be prevented from coming off in the direction in which the rotating shaft extends (rightward in the figure) by the flange. ing. In addition, jack bolt 18
The flange portion, which is the base of the rotary shaft 1, and the tip of the rotating shaft 1 are spaced apart from each other. The distal end side of the jack bolt 18, that is, the distal end portion in the direction in which the rotating shaft 1 extends, is screwed into the jack hinge 16 to which the above-described jack rod 20 is connected. This jacket bolt 1
8, a screwdriver or the like is used to form a necessary groove for rotating the jack bolt, or a bolt head having the same diameter or a smaller diameter than the shaft.

By the way, when changing the winding diameter of the yarn winding section which is the weft storage section, the head base bracket 1
5, loosen the set bolt 17 that attaches the rod base 16 and fixed drum 3, and then rotate the jack bolt 18 using a screwdriver or the like. Then, since the jack bolt 18 is screwed into the jack hinge 19, the jack hinge 19 slides in the longitudinal direction of the jack bolt 18 as the jack bolt 18 rotates.

In this way, when the jack hinge 19 moves in the jack bolt axial direction, i.e., to the left in FIG. 1, the rod base 16 and drum 3 side ends of each jack key 20 rotatably attached to the jack hinge 19 move radially outward. Then, the rod base 16 and drum 3 to which the tip of the jack key 20 is rotatably attached both move the same distance along the slide groove A of the head base bracket 15.
5 in the radially outward direction or in the center direction, the diameter of the thread winding section consisting of the rods 4a to 4f attached to the rod base and the drum 3 can then be changed without the center being displaced.

On the other hand, a worm wheel 9 to which a stopper 10 having a pawl 14 that engages with the worm 8 is attached is also attached to a predetermined position on the drum 3 via a predetermined bracket (not shown). Therefore, when the drum 3 moves, the worm wheel 9 also moves in dimension in the same direction as the drum's moving direction like the worm 8, so even if the diameter of the bobbin winding part is changed, the drum outer circumferential surface of the pawl 14 will not change. The degree of protrusion and the timing of sinking remain the same as before the diameter of the bobbin winding portion was changed.

By the way, there is a certain limit to increasing or decreasing the winding diameter of the thread winding section. Therefore, when it is desired to make the winding length longer, the rod 4 for winding and storing the weft yarn together with the drum can be attached to a leg portion 40 as shown in FIG. 6A.
Just replace it with one with a longer 0 dimension. By doing so, the radius of the thread-wrapped portion made of the rod becomes longer, the winding diameter increases, and a longer winding length can be obtained. On the other hand, if a shorter winding length is desired, the leg portion 410 may be replaced with a shorter rod 41 as shown in FIG. 6B.

Now, if this rod is replaced with a rod 40 with a longer leg length as shown in FIG. The center C2 of the thread is shifted from the center C1 of the thread winding section made up of the rod 4 and fixed drum 3 shown in FIG. 1 (see FIG. 7). That is, the center of the bobbin winding portion moves by the dimension D from C1 to C2. Then, since the fixed yarn guide YG is installed on the center line C1 of the thread winding section, the center of the thread winding section, that is, the center of the balloon, and the position of the yarn guide YG are shifted. For this reason, the balloon inevitably has an unstable shape like the conventional one described above, and as a result, uneven unwinding tension occurs, making subsequent weft insertion unstable. Furthermore, the timing at which the weft is released from the weft transfer pawl 14 is different, making it impossible to properly unwind the weft. Therefore, it is necessary to align the position of the fixed yarn guide YG with the center position of the yarn winding section after changing the winding diameter. For this purpose, it is conceivable to move the position of the fixed yarn guide YG onto the center line of the winding part after the winding diameter has been changed. However, if you do that, the fixed yarn guide YG and main nozzle MN
The weft yarn is bent by the clamper CL located in between. When the weft yarn unwound from the weft storage device is bent in this way, a moderate tension is applied to the weft yarn,
Moreover, the weft pulling resistance of the main nozzle increases, which is disadvantageous. Therefore, in this invention, the weft storage device itself is operated while operating the loom so that the position of the fixed yarn guide is on the center line C2 after changing the winding diameter without moving the position of the fixed yarn guide. The balloon is moved while observing the shape of the balloon after changing the winding diameter inside. To do this, first, remove the bolts 70 that fixed the drum bracket 50 to the frame F and the idler pulley 6.
I'll loosen up 3. Then, when the bracket jack bolt 80 is rotated, the jack bolt 8
Since the drum bracket 50 is attached to the drum bracket 50 at one end thereof, the drum bracket 50 moves up and down relative to the frame F as the jack bolt 80 rotates.

Then, while checking the condition of the balloon, position the drum bracket 50, then tighten the bolt 70 and fix the position of the idler pulley 63 so that the tension of the belt B is appropriate. shape can be obtained.

In the above description, a jack bolt or the like is used as the weft storage device position adjustment mechanism, but this invention is not limited to this. For example, a pneumatic or hydraulic cylinder mechanism or a lever mechanism is used to move the weft storage device up and down. It is also possible to adjust the movement accordingly.

In this case, if work is required to loosen or tighten the idler pulley 63,
The workability deteriorates. Therefore, as shown in FIG. 2, for example, a tension spring SP is attached to the lever 630 that supports the idler pulley 63 so that it is elastically biased, and the idler pulley 63 is set to always apply tension to the belt. If you do this, this work is not necessary.

As described above, according to this invention, not only can the winding diameter of the weft storage section be changed concentrically, but also if there is a limit to the concentric change, by replacing a predetermined member. It is possible to obtain an appropriate weft storage length that cannot be obtained by changing the core increase or decrease. Furthermore, even with this method, the balloon shape does not collapse and stable unwinding can be performed, so stable weft insertion can be performed.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of the weft storage device of this invention, FIG. 2 is a rear view of the weft storage device of this invention,
FIG. 3 is a front sectional view showing a part of the weft storage device of this invention, FIG. 4 is a front sectional view of the weft storage device of this invention, and FIG. 5 is a weft transfer mechanism used in the weft storage device of this invention. 6th enlarged sectional view showing
Figures A and B are side views showing other rods used in the weft storage device of this invention, and FIG. 7 is an explanatory view of the operation of the weft storage device of this invention. 1... Rotating shaft, 2... Yarn guide for thread winding,
3...drum, 4,40,41...rod, 5...
... Drive bevel gear, 6 ... Driven bevel gear, 8 ... Worm, 9 ... Worm wheel,
10... Stopper, 14... Claw, 15... Head base bracket, 16... Rod base, 17
...Set bolt, 18...Judge bolt, 1
9... Jacket hinge, 20... Jacket rod, 21... Shifter bracket, 22... Shifter, 24... Jacket base, 26... Gear, 3
0, 31, 32, 33, 34...Bearing, 50...
Drum bracket, 61...Driven pulley, 6
2... Drive pulley, 63... Idler pulley, 70... Screw, 80... Bracket bolt, B... Belt, Y... Weft, CL... Clamper, YG... Fixed yarn guide, MN... Main nozzle, SP...pull spring.

Claims (1)

[Claims for Utility Model Registration] 1. At least a stationary thread winding section and a thread winding yarn guide 2 that rotates relative to the thread winding section.
In the weft storage device, the yarn winding section is composed of a drum 3 and a plurality of removable rods 4, 40, 41 arranged in parallel in a semicircular arc shape along the circumferential direction of the drum. , The above rod has its leg 4 for changing the winding diameter.
A variety of rods with different lengths are available, and if the rod is replaced and the radius of the yarn winding part of the rod differs from the drum radius, a weft storage device is used to align the center of the balloon with the fixed yarn guide YG position. 1. A weft storage device for a fluid jet loom, comprising a position adjustment mechanism. 2. The weft storage device position adjustment mechanism includes a jack bolt 80 attached to a predetermined position of a drum bracket that supports the weft storage device, a subframe SF that supports the jack bolt, and a mounting element 70 that fixes the drum bracket to the frame F. A fluid jet type weft storage device for a loom according to claim 1, characterized in that the device comprises: