JPS61108727A - Fiber delivery method of nipper in cotton comber - Google Patents

Abstract

PURPOSE:To prevent the entering of fibers into the rear part of a top comb in buckled state, by placing an assistant nipper between a feed roller and a nipper, and making the assistant nipper to perform a particular motion. CONSTITUTION:The nipper 10 is lowered and brought into contact with the cushion plate 8. The fiber bundle (a) is transferred between the feed roller 9 and the cushion plate 8, and is heaped between the feed roller 9 and the nipper 10 on the cushion plate 8. The nipper is lifted, and the assistant nipper 16 is lowered between the nipper 10 and the feed roller 9 to push the fiber bundle (a) forward. The front end of the pushed fiber bundle (a) is introduced into the gap between the detaching rollers 3, 3.

Description

[Detailed Description of the Invention] (Object of the Invention) Industrial Field of Use This invention relates to a nipper device for a cotton combing machine, and more specifically, the nipper device is movable up and down toward the cushion plate at a position between the feed roller and the nipper. The pack word is equipped with an auxiliary nipper on the nipper body, and when the nipper body retreats, the feed roller feeds the wrap, and when the nipper body moves forward, the nipper rises and the auxiliary nipper descends to feed the wrap forward. This invention relates to a nipper device for a feed type cotton comber machine.

Conventional technology Conventional nipper devices include a forward feed type where the feed roller sends the wrap when the nipper body moves forward, and a packward feed type where the feed roller sends the wrap when the nipper body moves backward. There is. The former nipper device has a nipper main body that moves back and forth toward the detaching roller, a fixed cushion plate, and a nipper that can move up and down toward the cushion plate, and a Equipped with a feed roller that can be rotated, when the nipper body retreats, the nipper grips the wrap between it and the cushion plate and combs the tip of the lap with a comb cylinder, and when the nipper body moves forward, the nipper grips the wrap between the wrap and the cushion plate. As soon as the grip is released, the feed roller feeds out the wrap,
This feeding of the wrap is continued until the nipper main body is moved forward to the maximum point. Also, the latter nipper fi
L is equipped with a cushion plate, a nipper, and a feed roller in the nipper main body, and is equipped with an auxiliary nipper that can move up and down toward the cushion plate between the feed roller and the nipper, and when the nipper main body retreats, the nipper When the nipper is lowered, the feed roller feeds the wrap and accumulates the wrap between the nipper and the feed roller. When the nipper body moves forward, the nipper is raised and the auxiliary nipper descends and presses the wrap, pushing the wrap forward. The fibers at the leading end of the wrap are then delivered to a detaching roller.

Problems to be Solved by the Invention In the conventional forward-feed type nipper device described above, the wrap is fed forward until the nipper main body is moved forward, so the wrap is not fed even after the top comb acts on the wrap. As a result, the fibers behind the top comb (on the upstream side) are stopped by the top comb and bent into a buckled state behind the top comb, and these buckled fibers are stretched during the next cylinder combing. As a result, the combing length becomes longer, and more long fibers (movable fibers) fall out, resulting in a higher cotton fall rate. In addition, in the above nipper device, the distance between the nip points of the detaching roller and the feed roller during piecing is large, and floating fibers in the wrap between the two nip points are not controlled in any way. When the wrap is pulled out, floating fibers are entrained and moved by the movement of the drawn fibers, and these entrained fibers are stopped at the rear side of the top comb, increasing the cotton drop rate. In addition, as mentioned above, since the distance between the nip points of the detaching roller and the feed roller is large, the tension of the wrap when the top comb penetrates into the fleece becomes weaker, and the top comb penetrates into the fleece sufficiently. There was a problem in that the short fibers could not be removed sufficiently by the top comb.

On the other hand, the conventional packed word feed type nipper device was devised to solve the problems of the forward feed type nipper device described above, and is disclosed in Japanese Patent Publication No. 41-1299 and Utility Model Publication No. 58-24945. This method is disclosed in Japanese Utility Model Publication No. 59-5741, etc. In such a packed word feed type nipper device, feeding of the lap ends before the top comb enters the lap, so it is possible to prevent buckling fibers from occurring on the rear side of the dope comb due to feeding of the lap. In front of the feed roller, the auxiliary nipper elastically clamps the wrap between the wrap and the cushion plate, which prevents floating fibers from being brought in when the wrap is pulled out. This has the advantage that the content can be reduced, and the tension of the wrap can be increased when the top comb penetrates, allowing the top comb to sufficiently remove the short fibers. However, even though the nipper device has the above advantages, various studies have revealed that it still has the following problems. First, because the auxiliary nipper elastically holds the wrap between the cushion plate and the cushion plate, when the tip of the wrap is moved to the feeding point of the detaching roller and begins to pull out the wrap, the fibers are removed. The transition is done using the above auxiliary nippers.
After that, when the tip of the wrap is firmly sandwiched between the detaching rollers, the fibers of the wrap are suddenly pulled out, and as a result, the fiber density in the feeding direction of the one-nip fleece pulled out from the detaching rollers is reduced. This is a problem in that the quality of the combed sliver deteriorates due to deviation as shown by the dotted line in FIG. 4. Also, the second is
The auxiliary nippers are lowered by the auxiliary nipper drive device via a spring, and when the auxiliary nippers clamp the wrap and are prevented from descending, the movement of the auxiliary nipper drive device is absorbed by the compression of the spring. Therefore, the pressing force of the wrap by the auxiliary nipper fluctuates as the nipper main body moves back and forth, making it difficult for the fibers of the wrap to move smoothly.

(Structure of the Invention) Means for Solving the Problems The present invention attempts to solve the problems of the packed word feed type nipper device described above.
A nipper device for a packed word feed type cotton combing machine, comprising a cushion plate, a nipper, and a feed roller, and an auxiliary nipper located between the feed roller and the nipper that can move up and down toward the cushion plate. The present invention is characterized in that a space maintaining device is provided for maintaining a space gauge between the auxiliary nipper and the cushion plate when the auxiliary nipper is lowered.

Operation The operation of the above configuration is that when the nipper body retreats, the nipper
descends and grips the wrap between it and the cushion plate, and in this state the feed roller rotates to feed the wrap,
The plastic wrap is collected in a mountain shape between the nippers and the feed roller. Further, the front end of the wrap gripped by the nippers is cylindrical combed by a comb cylinder. Thereafter, when the nipper main body moves forward, the nipper moves up and releases its grip on the wrap, and the auxiliary nipper descends to push down the chevron-shaped wrap and push the wrap forward. The auxiliary nipper is lowered by a spacing device to the desired space gauge between the cushion play (this size should be larger than the dimension when the wrap is fully pressed).
The wrap is placed in the space gauge between the auxiliary nipper and the cushion plate, and the auxiliary nipper provides a weak resistance to the wrap.6Then, the fibers at the tip of the wrap are passed to the detaching roller. The top comb is then pulled out of the wrap and inserted into the wrap for combing.

Embodiment Figures 1 and 2 show the first embodiment.
2 shows a comb cylinder attached to a comb cylinder shaft 2, 3 a pair of upper and lower detaching rollers, and 4 a top comb.

As is well known, the top comb 4 is configured to be moved back and forth as well as up and down in accordance with the back and forth movement of the nipper body, which will be described later. Reference numeral 5 denotes a nipper disposed above the comb cylinder 1 and in front of the detaching roller 3 and the top comb 4 (on the upstream side when viewed in the direction of progress of the wrap).
The device constitutes a combing mechanism together with the comb cylinder 1, detaching roller 3, and top comb 4.

In this nipper device 5, 6 is a nipper main body, which is composed of a main body portion 6a that is long in the left-right direction (wrapp width direction) and support arm portions 6b extending rearward from both ends of the main body portion 6a. The main body 6a of the nipper main body 6 is connected to a support lever (not shown) that is pivotally supported on the machine frame, and the rear end of the support arm 6b is connected to a swing lever (not shown) attached to the nipper shaft 7. By the reciprocating movement of the nipper shaft 7, the nipper shaft 7 is moved back and forth between the backward end position shown in FIG. 1 and the forward end position shown in FIG. 2, so that the locus of point P becomes K. Main body portion 6a of the nipper main body 6
A cushion plate 8 is fixedly attached to the cushion plate 8, and selvedge guides 8a for guiding both sides of the wrap a are integrally provided on the upper surface of both ends of the cushion plate 8. A feed roller 9 is rotatably and removably mounted on the cushion plate 8, and is rotated by a predetermined amount in the direction of the arrow while the nipper main body 6 is retreating to feed the wrap a forward.

Note that the feed roller 9 may be placed on a separately provided bottom feed roller. Reference numeral 10 denotes a nipper which is arranged to be movable up and down toward the cushion plate 8, and both ends thereof are connected to the pair of support arms 6 of the nipper main body 6.
(b) are fixed to the front ends 11a of nipper arms 11 rotatably supported at the front ends thereof. Above nipper arm 1
As is well known, a spring rod 12 is attached to the rear end portion 11b of 1.
One end of the spring rod 12 is connected with a pin, and the other end of the spring rod 12 is inserted into a hole 13a of a pivot 13 rotatably attached to the machine frame, and a nut 14 screwed onto the tip thereof is connected to the pivot 13. They are urged forward by a spring 15 so that they come into contact.

In the nipper 10, when the nipper main body 6 moves forward, the forward movement of the rear end portion 11a of the nipper arm 11 is stopped by the spring rod 12 near the forward end of the nipper main body 6, and as the nipper main body 6 moves forward thereafter, as shown in FIG. When the nipper main body 6 starts to retreat, the nipper 10 descends and grips the wrap a between it and the cushion plate 8, and then the nipper main body 6
The spring rod 12 is moved while the spring 15 is compressed by the retreat of the spring rod 12.

Next, reference numeral 16 denotes an auxiliary nipper which is disposed between the feed roller 9 and the nipper 10 so as to be movable up and down toward the cushion plate 8, and both ends thereof are the front ends of the pair of support arms 6b of the nipper main body 6. The auxiliary nipper arms 17 are fixed to the front ends 17a of the auxiliary nipper arms 17, which are rotatably supported on the respective shafts. The pair of left and right auxiliary nipper arms 17 are provided with a connecting bar 18 that integrally connects the rear end portions 17b, and a lever 19 is fixed to the intermediate portion of the connecting bar 18. One end of a spring rod 20 is connected to the tip of the lever 19 with a pin. This spring rod 2
The other end of 0 is a hole 22a of a pivot 22 rotatably attached to a drive lever 21 fixed to the nipper shaft 7.
The adjustment nut 23 and the lock nut 24 are screwed into the distal end thereof. The above spring rod 20
is urged forward by a spring 25, and the adjusting nut 23 is brought into contact with the pivot 22. The position of the adjustment nut 23 is adjusted so that when the nipper main body 6 is retreating, the auxiliary nipper 16 is raised during the retreat, and when the nipper main body 6 is moved forward, the auxiliary nipper 16 is lowered during the forward movement. Next, reference numeral 26 denotes a spacing device which maintains a required space gauge between the auxiliary nipper 16 and the cushion plate 8 when the auxiliary nipper 16 is lowered, and is screwed onto the connecting bar 18 of the auxiliary nipper arm 17. A hole 27 is provided, and an adjusting screw rod 28, which is illustrated as a stopper that can come into contact with the nipper main body 6, is screwed into the screw hole 27, and the adjusting screw rod 28 is fixed with a lock nut 29. The adjusting screw rod 28 is turned on when the size L of the space gauge between the auxiliary nipper 16 and the cushion plate 8 becomes slightly smaller than the natural thickness of the wrap a (at least before the time when the spring 25 starts to compress). ), for example, when it reaches about 1.5 m, it comes into contact with the receiving part 6C of the nipper main body 6 and prevents the subsequent rotation of the auxiliary nipper arm 17, and the subsequent forward rotation of the drive lever 21. The pivot 22 is adjusted to compress the spring 25 by the movement. The adjusting screw rod 28 may be attached to the nipper main body 6 or the lever 19.The spring 25 does not apply a pressing force to the wrap a as in the conventional device, but can be adjusted in the state shown in Fig. 1. This is to ensure that the nut 23 contacts the pivot 22. The size of the space gauge L varies depending on the gel of the wrap a, but is preferably about 0.5 to 2.51 I.

In the above configuration, the nipper main body 6 is
When it is moved forward by rotation of the shaft 7.

As shown in FIG. 3, the auxiliary nipper 16 is gradually lowered, and the nipper 10 is gradually raised.

Then, the nipper 10 is raised to release the grip on the wrap a, and the auxiliary nipper 16 is lowered to release the nipper 10.
When the upper surface of the chevron-shaped wrap a between the nipper 10 and the feed roller 9 is pushed down, the chevron-shaped wrap a is sent forward from between the nipper 10 and the cushion plate 8. Above auxiliary nipper-1
6 is lowered and the space gauge L between it and the cushion plate 8 reaches a preset size, the adjusting screw rod 28 of the spacing retaining device 26 engages the receiving portion 6c of the nipper body 6.
Even if the drive lever 21 is rotated forward after that, the space gauge L between the auxiliary nipper 16 and the cushion play 88 is maintained at the set value. Therefore, the auxiliary nipper 16 presses down the upper surface of the wrap a by a small amount with gaps between the fibers, increasing the frictional force between the fibers, but making it possible for the fibers to move easily. do. The size of the space gauge L does not change even if the nipper main body 6 is moved forward thereafter, and the wrap a is positioned in the space gauge L having a constant size.

After that, when the nipper main body 6 is moved near the forward end and the fibers at the tip of the wrap a are passed to the detaching roller 3 which is rotating normally, the fibers at the tip of the wrap a are moved forward by the rotation of the detaching roller 3. The fibers are pulled out in one nip to make fleece. Further, when the nipper main body 6 is moved to approximately the most advanced end, the top comb 4 descends and enters the lap a between the detaching roller 3 and the auxiliary nipper 16. Therefore, by pulling out the fibers at the tip of the wrap a, the rear part of the fibers for one nip is combed by the top comb 4, and short fibers in the pulled out fibers are removed. When the detaching roller 3 pulls out the fibers at the tip of the wrap a as described above, the auxiliary nipper 16 slightly pushes down the top surface of the wrap a on the cushion plate 8 to increase the frictional force between the fibers. As a result, the fibers are less entrained when the detaching roller 3 pulls and moves the fibers at the tip of the wrap a, and as a result, the rear end hook of the fibers can be extended, and the number of long fibers that are stopped at the rear side of the top comb 4 is reduced. This can reduce the cotton drop rate. In addition, since the auxiliary nipper 16 provides a weak resistance to the wrap a, the tension of the wrap a into which the top comb 4 enters increases, and the top comb 4 is able to sufficiently enter into the wrap a and is pulled out. Short fibers in the fibers can be reliably removed. In addition, since the auxiliary nipper 16 and the cushion plate 8 are provided with a required space gauge L to prevent the auxiliary nipper 16 from gripping the wrap a with a spring force, the detaching roller 3 is When you start pulling the fibers at the tip, the fibers can easily move between the auxiliary nipper 16 and the cushion plate 8, and as a result, the fiber density in the wrap feed direction of the one-nip fleece is shown by the solid line in Figure 4. As shown in the figure, it is possible to obtain a substantially normal distribution, and it is possible to prevent the fiber density from being uneven as in the conventional apparatus. Therefore, unevenness in the fiber density of the fleece sent out by the detaching roller 3 can be reduced, and the quality of the combed sliver can be extremely improved. Yet again. Since the size of the space gauge L between the auxiliary nipper 16 and the cushion plate 8 is kept constant regardless of the forward and backward movement of the nipper main body 6, the resistance force of the wrap a by the auxiliary nipper 16 can be kept constant. As a result, the wrap a can be pulled out smoothly, and the resistance force of the wrap a can be easily adjusted by the auxiliary nippers 16. The above-mentioned resistance force can be easily adjusted by turning the adjusting screw lever 28 and changing the size of the space gauge L. next,
When the nipper main body 6 is moved backward to a sufficient extent, the top comb 4 rises and the auxiliary nipper moves as shown in FIG.
16 is raised to release the upper surface of the wrap a, and as the nipper main body 6 moves backward, the nipper 10 is lowered to grip the wrap a between it and the cushion plate 8. Thereafter, the feed roller 9 rotates to feed the wrap a, and the wrap a between the nipper 10 and the feed roller 9 is curved into a chevron shape and stored. In addition, the auxiliary nipper 16
The tip of the wrap a held between the cushion plate 8 and the cushion plate 8 is combed by the comb cylinder 1.

FIG. 5 shows a second embodiment of the present application, in which adjustment bolts 28e, which are illustrated as stoppers, are attached to the lower surfaces of both ends of the auxiliary nipper 16e, and the adjustment bolts 28e are fixed with lock nuts 29e, and the distance holding device 26e is fixed. It is composed of The adjustment bolt 28e may be attached to the upper surface of the selvedge guide 8ae. In addition, the above first
For components that are the same as those in the embodiment, the same reference numerals as those of the corresponding parts are appended with the letter e, and redundant explanation will be omitted. Similarly, the third embodiment of the first order will also be designated with the letter f, and repeated explanation will be omitted.

6 and 7 show a third embodiment of the present application, in which an auxiliary nipper arm 17f supporting an auxiliary nipper 16f is rotatably supported on the nipper main body 6f, and the auxiliary nipper
A cam follower 30 is rotatably provided on the arm 17f, and the cam surface 3 of the cam 31 is provided with the cam follower 30 on the machine frame.
The cam surface 31a is brought into elastic contact with the nipper main body 6f by a spring 32, and the auxiliary nipper
16f is configured to move up and down, and the cam 31
The distance holding device 26f is configured by setting the position of the space gauge Lf such that a desired size of space gauge Lf is left between the auxiliary nipper 16f and the cushion plate 8f even when the auxiliary nipper 16f is lowered. The cam 31 is slidably abutted against the slide 33 diagonally rearward and upward, and is fixed in a position-adjustable manner by a fixing bolt 35 passed through the elongated hole 34 of the cam 31, so that the position of the cam 31 relative to the slide 33 can be adjusted. The timing of vertical movement of the auxiliary nipper 16f can be adjusted by. The slide 33 is slidably abutted diagonally forward and upwardly against a base plate 36 fixed to the machine frame, and fixed in a position-adjustable manner by a fixing bolt 38 passed through a long hole 37 of the slide 33. By adjusting the position of the space gauge Lf with respect to the board 36, the size of the space gauge Lf is changed to g1! It is now possible to arrange it.

(Effects of the Invention) As described above, in the present invention, the wrap is fed by the feed roller when the nipper main body retreats.

After that, when the nipper main body moves forward, the nipper rises and the auxiliary nipper descends to feed the previously sent wrap forward, so when the wrap is transferred between the detaching rollers, the top comb acts on the wrap. It is possible to finish sending out the wrap by this point, thereby eliminating the phenomenon where the fibers are caught in a buckled state on the back side of the top comb, and reducing the amount of fluff dropped by the next cylinder combing action. At the same time, it is economical because the content of long fibers in the fallen cotton can be reduced. In addition, when the nipper main body moves forward, the auxiliary nipper descends and slightly pushes down the top surface of the wrap in front of the feed roller, so when the wrap is passed between the detaching rollers and the fibers at the tip of the wrap are pulled out, the feed By increasing the frictional force between the fibers of the wrap at a position in front of the roller, it is possible to suppress the entrainment of fibers and to extend the hooks at the rear ends of the fibers, thereby reducing the cotton drop rate and reducing the long fibers during the cotton drop. It is possible to reduce the content rate.

In addition, as mentioned above, the auxiliary nipper pushes down the top surface of the wrap slightly, so it can apply tension to the wrap when the top comb enters the wrap, allowing the top comb to fully penetrate into the wrap. As a result, the short fibers can be sufficiently removed by the top comb. Furthermore, even if the auxiliary nippers are designed to push down the top surface of the wrap as described above, the auxiliary nippers
Since the lowering is stopped with the required space gauge between the cushion plate and the cushion plate, the elastic grip of the wrap between the cushion plate and the wrap can be prevented, and the fibers of the wrap can be smoothly transferred. As a result, the fiber distribution of the one-nip fleece pulled out from the detaching roller can be made into an almost normal distribution state, which has the revolutionary effect of significantly improving the quality of the combed yarn. be.

[Brief explanation of the drawing]

The drawings show embodiments of the present application; FIG. 1 is a sectional view showing the first embodiment, FIG. 2 is a sectional view showing the operation of FIG. 1, FIG. 3 is a time chart showing the operation, and FIG. Fig. 4 is an explanatory diagram showing the density of one-nip fleece, Fig. 5 is an explanatory diagram showing the second embodiment, Fig. 6 is a sectional view showing the third embodiment, and Fig. 7 shows the operation of Fig. 6. FIG. 3... Detaching roller, 5... Nipper device. 6... Nipper body, 8... Cushion plate, 9... Feed roller, 10... Nipper-1
16... Auxiliary nipper - 126... Spacing holding device,
L...Space Gauge Patent Applicant Howa Kogyo Co., Ltd. Procedural Amendment January 24, 1988 1° 22.4 1.Indication of Case Patent Application No. 226042 of 1982
No. ,. 2. Name of the invention Nipper device for cotton comber machine 3.
Relationship with the case of the person making the amendment Patent applicant 5, the number of inventions increased by the amendment None The entire text of the application and specification The entire text of the amendment Claims: A nipper main body that is moved back and forth toward the detaching roller is provided with a fixed cushion plate and a nipper that is movable up and down toward the cushion plate, and is located on the upstream side of the nipper. A rotatable feed roller and an auxiliary nipper that can move up and down toward the cushion plate are provided between the feed roller and the nipper. When the fiber is delivered to the detaching roller, the nipper is first moved when the nipper main body retreats. The fiber bundle is sent out by the feed roller in the lowered state, and the fiber bundle is collected in a mountain shape between the nipper and the feed roller, and then, when the nipper main body moves forward, the auxiliary nipper is moved to the above-mentioned cushion plate while the nipper is raised. In between, the fiber bundle is lowered to a position where a predetermined space gauge is taken, and the above-mentioned chevron-shaped fiber bundle is pushed down and the fiber bundle is pushed forward, and then the fibers at the tip of the fiber bundle are passed to a detaching roller, and the fibers are transferred to the above-mentioned auxiliary nipper. 1. A fiber delivery method using a nipper device in a cotton comber machine, characterized in that the fibers at the tip of the fiber bundle are pulled out while applying weak resistance to the fiber bundle. 3. Detailed Description of the Invention (Object of the Invention) Industrial Application Field This invention relates to a fiber delivery method of a nipper device in a cotton combing machine. The nipper body is equipped with an auxiliary nipper that can be moved up and down by the nipper body, and when the nipper body retreats, the feed roller feeds the fiber bundle, and when the nipper body moves forward, the nipper rises and the auxiliary nipper descends to move the fiber bundle forward. The present invention relates to a fiber delivery method using a nipper device in a cotton combing machine. 2. Description of the Related Art Conventional fiber delivery methods for nipper devices include a forward feed method in which a feed roller feeds the fiber bundle when the nipper body moves forward, and a forward feed method in which the feed roller feeds the fiber bundle when the nipper body moves backward. There is a packed word feed method. In the former fiber delivery method, a nipper main body that is moved back and forth toward a detaching roller is provided with a fixed cushion plate and a nipper that is movable up and down toward the cushion plate, respectively.
A rotatable feed roller is provided on the upstream side of the nipper, and when the nipper body retreats, the nipper grips the fiber bundle between it and the cushion plate and combs the tip of the fiber bundle with a comb cylinder. When the nipper moves forward, the nipper releases its grip on the fiber bundle and the feed roller feeds out the fiber bundle, and this feeding of the fiber bundle continues until the nipper main body is moved forward to its maximum extent. In the latter fiber feeding method, the nipper main body is equipped with a cushion plate, a nipper, and a feed roller, and an auxiliary nipper that can move up and down toward the cushion plate is installed between the feed roller and the nipper. When the nipper moves back, the feed roller sends the fiber bundle and accumulates the fiber between the nipper and the feed roller, and when the nipper moves forward, the auxiliary nipper lowers with the nipper raised. The fiber bundle is pressed, the fiber bundle is sent forward, and the fiber bundle is elastically clamped between the cushion plate by the spring force, and then the fibers at the tip of the fiber bundle are handed over to the detaching roller. ing. Problems to be Solved by the Invention In the above-mentioned conventional forward-feed fiber delivery method, the fiber bundle is fed forward until the nipper main body is moved forward, so even after the top comb has acted on the fiber bundle, The fiber bundle is fed, and as a result, the fibers behind the top comb (on the upstream side) are stopped by the top comb and bent into a buckled state behind the top comb, and these buckled fibers are transferred to the next During cylinder combing, the fibers are stretched and the combing length becomes longer, and more long fibers (movable fibers) are shed, resulting in a higher cotton shedding rate. In addition, in the above nipper device, the distance between the nip points of the detaching roller and the feed roller during beading is large, and floating fibers in the fiber bundle between the two nip points are not controlled in any way. When the fiber bundle is pulled out by the method, floating fibers are entrained and moved by the movement of the drawn fibers, and these entrained fibers are stopped behind the top comb, increasing the cotton drop rate. In addition, as mentioned above, since the distance between the nip points of the detaching roller and the feed roller is large, the tension of the fiber bundle when the top comb penetrates into the fleece is weakened, and the top comb does not fully penetrate into the fiber bundle. However, there was a problem in that the removal of short fibers by the top comb was likely to be insufficient. On the other hand, the conventional backward feed fiber delivery method was devised to solve the problems of the forward feed method described above, and is disclosed in Japanese Patent Publication No. 41-1299 and Utility Model Publication No. 58-24945. , Utility Model Publication No. 59-5741, etc. In such a backward feed type fiber delivery method, the feeding of the fiber bundle is finished by the time the top comb enters the fiber bundle, so the generation of buckled fibers behind the top comb due to the feeding of the fiber bundle is avoided. In addition, since the auxiliary nipper in front of the feed roller elastically clamps the fiber bundle between the cushion plate, it is possible to prevent floating fibers from being brought in when pulling out the fiber bundle, reducing the cotton drop rate. This method has the advantage that the content of long fibers in the fallen cotton can be reduced, and the tension of the fiber bundle when it enters the top comb can be increased, allowing the top comb to sufficiently remove the short fibers. However, even though the method has the advantages described above, various studies have revealed that it still has the following problems. First, since the auxiliary nipper elastically clamps the fiber bundle between the cushion plate and the cushion plate, when the fiber bundle tip is moved to the feeding point of the detaching roller and begins to pull out the fiber bundle. The transfer of the fibers is suppressed by the nipping by the auxiliary nippers, and then, when the tip of the fiber bundle is securely sandwiched between the detaching rollers, the fibers of the fiber bundle are suddenly pulled out, and as a result, the fibers are pulled out from the detaching rollers. This is a problem in that the fiber density in the feeding direction of the one-nip fleece becomes uneven as shown by the dotted line in FIG. 4, and the quality of the combed sliver deteriorates. Also, the second is the auxiliary nipper
is lowered via a spring by an auxiliary nipper drive. When the auxiliary nipper clamps the fiber bundle and is prevented from descending, the movement of the auxiliary nipper drive device is absorbed by the compression of the spring. The problem is that the pressure increases, making it difficult for the fibers of the fiber bundle to move smoothly. (Structure of the Invention) Means for Solving the Problems The present invention attempts to solve the problems of the conventional fiber delivery method described above, and includes a nipper main body equipped with a Kushimin plate, a nipper, and a feed roller. An auxiliary nipper is provided between the feed roller and the nipper that can move up and down toward the cushion plate, and when the m fibers are transferred to the detaching roller, the fiber bundle is is sent out by the feed roller and the fiber bundle is collected in a mountain shape between the nipper and the feed roller, and then when the nipper main body advances, the nipper is raised and the auxiliary nipper is placed between the cushion plate and the specified space gauge. The fiber bundle is lowered to the position where the mountain-shaped fiber bundle is pressed down and pushed forward, and then the fibers at the tip of the fiber bundle are passed to the detaching roller, and the auxiliary nippers apply a weak resistance to the fiber bundle. It is characterized by pulling out the fibers at the tip of the fiber bundle in the given state. Operation The operation of the above configuration is that when the nipper body retreats, the nipper
descends and grips the fiber bundle between it and the cushion plate, and in this state the feed roller rotates to feed the fiber bundle,
The fiber bundle is collected in a chevron shape between a nipper and a feed roller 6. The front end of the fiber bundle gripped by the nipper is cylindrical combed by a comb cylinder. Thereafter, when the nipper main body moves forward, the nipper rises and releases its grip on the fiber bundle, and the auxiliary nipper descends to push down the mountain-shaped fiber bundle and push the fiber bundle forward. The auxiliary nipper is lowered to the position where the desired space gauge (this size is larger than the dimension when the fiber bundle is completely pressed) is obtained between the cushion plate and the auxiliary nipper. The fiber bundle is positioned within the space gauge between the fiber bundle and the cushion plate, and the auxiliary nipper provides a weak resistance to the fiber bundle. Thereafter, the fibers at the tip of the fiber bundle are passed to a detaching roller and pulled out from the fiber bundle, and a top comb is inserted into the fiber bundle to perform combing. Embodiment Figures 1 and 2 show the first embodiment.
2 shows a comb cylinder attached to a comb cylinder shaft 2, 3 a pair of upper and lower detaching rollers, and 4 a top comb. As is well known, the top comb 4 is configured to be moved back and forth as well as up and down in accordance with the back and forth movement of the nipper body, which will be described later. Reference numeral 5 denotes a nipper disposed above the comb cylinder 1 in front of the detaching roller 3 and the top comb 4 (on the upstream side when viewed in the traveling direction of the fiber bundle).
The device constitutes a combing mechanism together with the comb cylinder 1, detaching roller 3, and top comb 4. In this nipper device 5, 6 is a nipper main body, which is composed of a main body part 6a that is long in the left-right direction (m-grain end width direction) and support arm parts 6b extending rearward from both ends of the main body part 6a. has been done. The main body portion 6a of the nipper main body 6 is connected to a support lever (not shown) pivotally supported on the machine frame, and the rear end of the support arm 6b is connected to a swing lever (not shown) attached to the nipper shaft 7. The reciprocating movement of the nipper shaft 7 causes the nipper shaft 7 to move back and forth between the backward end position shown in FIG. 1 and the forward end position shown in FIG. 2, so that the locus of point P becomes K. Main body portion 6a of the nipper main body 6
A cushion plate 8 is fixedly attached to the cushion plate 8, and a cell bed guide 8a for guiding both sides of the fiber bundle a is integrally provided on the upper surface of both ends of the cushion plate 8. Further, a feed roller 9 is rotatably and removably mounted on the cushion plate 8, and is rotated by a predetermined amount in the direction of the arrow while the nipper main body 6 is retreating to feed the fiber bundle a forward. In addition. The feed roller 9 may be placed on a separately provided bottom feed roller. Reference numeral 10 denotes a nipper disposed so as to be movable up and down toward the cushion plate 8, and both ends of the nipper arm 11 are rotatably supported on the front ends of the pair of support arms 6b of the nipper main body 6. It is fixed to the front end portion 11a of. As is well known, one end of a spring rod 12 is connected with a pin to the rear end 11b of the nipper arm 11, and the other end of the spring rod 12 is connected to a hole 13 of a pivot 13 rotatably attached to the machine frame.
A nut 14 inserted through the hole a and screwed onto the tip thereof is urged forward by a spring 15 so as to come into contact with the pivot 13. The nipper 10 has a nipper main body 6
When the nipper arm 11 moves forward, the forward movement of the rear end 11a of the nipper arm 11 is stopped by the spring rod 12 near its forward end, and as the nipper main body 6 moves forward thereafter, it is raised as shown in FIG. 2 and grips the fiber bundle a. Release. When the nipper main body 6 begins to retreat, the nipper 10 descends and grips the fiber bundle a between it and the cushion plate 8, and as the nipper main body 6 moves back, the spring 15 is compressed and the spring rod 12 is moved. The auxiliary nipper 16 is arranged between the feed roller 9 and the nipper 10 so as to be movable up and down toward the cushion plate 8, and both ends thereof are connected to a pair of nipper bodies 6. The auxiliary nipper arms 17 are fixed to front ends 17a of auxiliary nipper arms 17 which are rotatably supported on the front ends of the support arms 6b. The pair of left and right auxiliary nipper arms 17 are provided with a connecting bar 18 that integrally connects the rear end portions 17b, and a lever 19 is fixed to the intermediate portion of the connecting bar 18. One end of a spring rod 20 is connected to the tip of the lever 19 with a pin. This spring rod 2o
The other end is inserted into a hole 22a of a pivot 22 rotatably attached to a drive lever 21 fixed to the nipper shaft 7, and an adjustment nut 23 and a lock nut 24 are screwed into the tip thereof. The spring rod 20 is urged forward by a spring 25 so that the adjusting nut 23 comes into contact with the pivot 22. The position of the adjustment nut 23 is adjusted so that when the nipper main body 6 is retracted, the auxiliary nipper 16 is raised during the retreat, and when the nipper main body 6 is moved forward, the auxiliary nipper 16 is lowered during the forward movement. Next, reference numeral 26 denotes a spacing device which maintains a required space gauge between the auxiliary nipper 16 and the cushion plate 8 when the auxiliary nipper 16 is lowered, and is screwed onto the connecting bar 18 of the auxiliary nipper arm 17. A hole 27 is provided, and an adjusting screw rod 28, which is illustrated as a stopper that can come into contact with the nipper main body 6, is screwed into the screw hole 27, and the adjusting screw rod 28 is fixed with a lock nut 29. The adjusting screw rod 28 is turned on when the size L of the space gauge between the auxiliary nipper 16 and the cushion plate 8 becomes slightly smaller than the thickness of the fiber bundle a in its natural state (at least from the point when the spring 25 starts to compress). For example, when the temperature reaches 1.5+a, the nipper body 6 comes into contact with the receiving part 6c to prevent the auxiliary nipper arm 17 from rotating, and the drive lever 21 then moves forward. The pivot 22 is adjusted to compress the spring 25 by rotation. In addition. The adjusting screw rod 28 may be attached to the nipper main body 6 or may be attached to the lever 19. The spring 25 does not apply a pressing force to the fiber bundle a as in the conventional device, but is used to ensure that the adjusting nut 23 comes into contact with the pivot 22 in the state shown in FIG. The size of the space gauge L varies depending on the weight per unit length of the fiber bundle a, but is preferably about 0.5 mm to 2.5 mm. In the above configuration, the nipper main body 6 is
When the shaft 7 is rotated and moved forward, the auxiliary nippers 16 are gradually lowered as shown in FIG.
10 is gradually increased. Then, the nipper 10 is raised to release the grip on the fiber bundle a, and the auxiliary nipper 16 is lowered to release the grip on the fiber bundle a.
When the upper surface of the chevron-shaped fiber bundle a between the nipper 10 and the feed roller 9 is pushed down, the chevron-shaped fiber bundle a is sent forward from between the nipper 10 and the cushion plate 8. Above auxiliary nipper-1
6 is lowered and the space gauge L between it and the cushion plate 8 reaches a preset size, the adjusting screw rod 28 of the spacing retaining device 26 engages the receiving portion 6c of the nipper body 6.
Even if the drive lever 21 is rotated forward after that, the space gauge L between the auxiliary nipper 16 and the cushion plate 8 is maintained at the set value. Therefore, the auxiliary nipper 16 pushes down the upper surface of the fiber bundle a by a small amount with gaps between the fibers, increasing the frictional force between the fibers, but making it possible to easily move the fibers. The size of the space gauge L does not change even if the nipper main body 6 is moved forward thereafter, and the fiber bundle a is positioned in the space gauge L having a constant size. After that, when the nipper main body 6 is moved near the forward end and the fibers at the tip of the fiber bundle a are passed to the detaching roller 3 which is rotating normally, the fibers at the tip of the fiber bundle a are transferred to the rotating detaching roller 3. The fleece is pulled forward by the fibers, and one nip of fiber is pulled out to form fleece. Furthermore, when the nipper main body 6 is moved near the forward end, the top comb 4 descends and enters the fiber bundle a between the detaching roller 3 and the auxiliary nipper 16. Therefore, by pulling out the fibers at the tip of the fiber bundle a, the rear part of the fibers corresponding to one nip is combed by the top comb 4, and short fibers in the pulled out fibers are removed. When the detaching roller 3 pulls out the fibers at the tip of the fiber bundle a as described above, the auxiliary nipper 16 slightly pushes down the upper surface of the fiber bundle a on the cushion plate 8 to increase the frictional force between the fibers. As a result, the fibers are less entrained when the fibers at the tip of the fiber bundle a are pulled and moved by the detaching roller 3, and as a result, the rear end hook of the fibers can be extended and the fibers can be fixed to the rear side of the top comb 4. The number of long fibers can be reduced and the rate of cotton shedding can be reduced. In addition, since the auxiliary nipper 16 provides weak resistance to the fiber bundle a, the tension of the fiber bundle a into which the top comb 4 penetrates increases, and the top comb 4 can sufficiently penetrate into the fiber bundle a. Short fibers in the drawn fibers can be reliably removed. In addition, since the auxiliary nipper 16 and the cushion plate 8 are provided with a required space gauge L to prevent the auxiliary nipper 16 from gripping the fiber bundle a with spring force, the detaching roller 3 When the fibers at the tip of a are started to be pulled, the fibers can easily move between the auxiliary nipper 16 and the cushion plate 8, and as a result, the fiber density in the east feeding direction of the one-nip fleece is As shown by the solid line in the figure, it is possible to obtain a substantially normal distribution, and it is possible to prevent the fiber density from being uneven as in the conventional device. Therefore, unevenness in the fiber density of the fleece sent out by the detaching roller 3 can be reduced, and the quality of the combed sliver can be extremely improved. Yet again. Since the size of the space gauge L between the auxiliary nipper 16 and the cushion plate 8 is kept constant regardless of the forward and backward movement of the nipper body 6, the resistance force of the auxiliary nipper 16 on the fiber bundle a is kept constant. Therefore, the fiber bundle a can be pulled out smoothly, and the resistance force of the fiber bundle a by the auxiliary nipper 16 can be easily adjusted. The above-mentioned resistance force can be easily adjusted by turning the adjustment screw rod 28 and changing the size of the space gauge L.Next, when the nipper main body 6 is moved backward to a certain extent, as shown in FIG. As the top comb 4 rises as shown, the auxiliary nipper 1
6 is raised to release the upper surface of the fiber bundle a, and as the nipper main body 6 moves backward, the nipper 10 is lowered to grip the fiber bundle a between it and the cushion plate 8. after that. The feed roller 9 rotates to feed the fiber bundle a, and the nipper
The fiber bundle a between the feed roller 10 and the feed roller 9 is curved into a mountain shape and stored. Further, the tip of the fiber bundle a held between the auxiliary nipper 16 and the cushion plate 8 is combed by the comb cylinder 1. FIG. 5 shows a second embodiment of the present invention, in which the auxiliary nipper
Adjustment bolts 28e, which are illustrated as stoppers, are attached to the lower surfaces of both ends of the spacing 16e, and the adjustment bolts 28e are fixed with lock nuts 29e to constitute the spacing holding device 26e. The adjustment bolt 28a may be attached to the upper surface of the selvedge guide 8ae.For the same constituent parts as in the first embodiment, the same reference numerals as those of the corresponding parts will be appended with the letter e and redundant explanations will be given. Omitted. Similarly, the third embodiment of the first order will also be designated with the letter f, and repeated explanation will be omitted. 6 and 7 show a third embodiment of the present application, in which an auxiliary nipper arm 17f supporting an auxiliary nipper 16f is rotatably supported on the nipper main body 6f, and the auxiliary nipper
A cam follower 30 is rotatably provided on the arm 17f, and the cam surface 3 of the cam 31 is provided with the cam follower 30 on the machine frame.
The cam surface 31a is brought into elastic contact with the nipper main body 6f by a spring 32, and the auxiliary nipper
16f is configured to move up and down, and the cam 31
The position of the spacer I! is set so that a desired size of space gauge Lf is left between the auxiliary nipper 16f and the cushion plate 8f even when the auxiliary nipper 16f is lowered. 26f. The cam 31 is slidably abutted on the slide 33 diagonally rearward and upwardly, and is fixed so as to be adjustable in position by a fixing bolt 35 passed through the elongated hole 34 of the cam 31.
The timing of vertical movement of the auxiliary nipper 16f can be adjusted by adjusting the position of the auxiliary nipper 16f. Slide 3 above
3 is attached to a board 36 fixed to the machine frame so as to be able to slide diagonally forward and upward, and is fixed so that its position can be adjusted by a fixing bolt 38 passed through the long hole 37 of the slide 33. By adjusting the position relative to 36, the size of the space gauge Lf can be adjusted. (Effects of the Invention) As described above, in the present invention, the fiber bundle is fed by the feed roller when the nipper main body retreats. After that, when the nipper main body advances, the nipper rises and the auxiliary nipper descends to send the previously sent fiber bundle forward, so when the fiber bundle is delivered between the detaching rollers, the top comb acts on the fiber bundle. It is possible to finish sending out the fiber bundle by this point, thereby eliminating the phenomenon in which the fibers are caught in a buckled state on the rear side of the top comb. It is economical because it is possible to reduce the amount of fluff dropped by the subsequent cylinder combing action and to reduce the content of long fibers in the fluff. Also, when the nipper main body moves forward, the auxiliary nipper descends and slightly pushes down the east upper surface of the fiber in front of the feed roller, so when passing the fiber bundle between the detaching rollers and pulling out the fibers at the tip of the fiber bundle, By increasing the frictional force between the fibers of the fiber bundle at a position in front of the feed roller, it is possible to suppress the entrainment of fibers and to extend the hooks at the rear ends of the fibers. It is possible to reduce the fiber content. In addition, as mentioned above, the auxiliary nipper slightly pushes down the top surface of the fiber bundle, so it can apply tension to the fiber bundle when the top comb enters the fiber bundle, allowing the top comb to fully penetrate into the fiber bundle. As a result, short fibers can be sufficiently removed by the top comb. Furthermore, even if the auxiliary nipper pushes down the top surface of the fiber bundle as described above, the auxiliary nipper stops descending when the required space gauge is maintained between it and the cushion plate. , it is possible to prevent the fiber bundle from being elastically gripped between the cushion plate and the fibers of the fiber bundle can be transferred smoothly and evenly, thereby improving the fiber distribution of the one-nip fleece pulled out from the detaching roller. It is possible to obtain a substantially normal distribution state, which has the revolutionary effect of significantly improving the quality of the combed yarn. 4. Brief description of the drawings The drawings show embodiments of the present application. Fig. 1 is a sectional view showing the first embodiment, Fig. 2 is a sectional view showing the operation of the first @, and Fig. 3 is the operation. FIG. 4 is an explanatory diagram showing the density of one-nip fleece; FIG. 5 is an explanatory diagram showing the second embodiment; FIG. 6 is a cross-sectional diagram showing the third embodiment;
The figure is a sectional view showing the operation of FIG. 6. 3... Detaching roller, 5... Nipper device. 6...Nipper body, 8...Cushion plate.

Claims (1)

[Claims] 1. A nipper main body that is moved back and forth toward the detaching roller is provided with a fixed cushion plate and a nipper that is movable up and down toward the cushion plate, and the nipper body is provided with a fixed cushion plate and a nipper that is movable up and down toward the cushion plate. A rotatable feed roller and an auxiliary nipper that can move up and down toward the cushion plate are provided between the feed roller and the nipper, and when the nipper main body retreats, the feed roller feeds and rotates with the nipper lowered. In the nipper device of a cotton combing machine, in which the auxiliary nipper is lowered with the nipper raised when the nipper body moves forward, a space gauge is taken between the auxiliary nipper and the cushion plate when the auxiliary nipper is lowered. A nipper device for a cotton comber machine, characterized in that it is equipped with a spacing holding device. 2. The nipper device for a cotton combing machine according to claim 1, characterized in that the spacing device is configured to adjust the size of the space gauge between the auxiliary nipper and the cushion plate. 3. An auxiliary nipper arm supporting the auxiliary nipper is rotatably supported on the nipper main body, and the auxiliary nipper arm is configured to be reciprocated via a spring by a drive lever that rotates reciprocatingly, and the auxiliary nipper arm Claim 1, characterized in that a stopper is provided on one of the nipper main body and the nipper main body, and a stopper is provided on the other to stop the downward movement of the auxiliary nipper in the middle, thereby configuring a distance maintaining device. A nipper device for a cotton combing machine according to item 1 or 2. 4. The claim is characterized in that a stopper is provided on at least one of the lower surface of the auxiliary nipper and the upper surface of the cushion plate to abut against the other and catch the downward movement of the auxiliary nipper midway through, thereby configuring a distance maintaining device. A nipper device for a cotton combing machine according to item 1 or 2. 5. A nipper device for a cotton combing machine according to claim 3 or 4, wherein the stopper is constituted by an adjustment bolt. 6. An auxiliary nipper arm supporting the auxiliary nipper is rotatably supported on the nipper body, a cam follower is provided on the auxiliary nipper arm, and the cam follower is brought into elastic contact with the cam surface of a cam provided on the machine frame. The cam surface is configured to move the auxiliary nipper up and down with the back and forth movement of the nipper main body, and the cam is positioned so that a space gauge of the desired size is left between the auxiliary nipper and the cushion plate even when the auxiliary nipper is lowered. 2. A nipper device for a cotton combing machine according to claim 1, wherein the spacing maintaining device is configured by setting . 7. Change the size of the space gauge from 0.5mm to 2.5mm
A nipper device for a cotton combing machine according to claim 1, characterized in that: