JPS5824529B2 - Stripping roller for cards - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a card stripping roller in a card stripping device.

Conventionally, the web on the dosing cloth was removed by a fly comb, but as cards became faster, there was a drawback that the reciprocating motion of the fly comb could not keep up with the high-speed operation of the doss cloth.

Therefore, as an alternative to the fly comb, a stripping device using a roller is being considered.

First, a fly comb in which the comb is rotated as it is is shown in Utility Model Publication No. 32-926, as shown in Figures 1, 2, 3, and 4. By rotating a roller 8 having blades 2 at high speed, the web 7 is scraped off from above the doffer 1 to just below the roller 18, changed direction by a guide roller 3, collected by a trumpet 4, and transferred to calender rollers 5 and 6. This is something that will lead you to understand.

In the above configuration, when a large number of blades 2 are provided, the web cannot be scraped off even if the roller 8 is rotated at high speed, and the web winds around the surface of the roller 8 and cannot be transferred to the guide roller 3. The drawback is that it cannot be done.

In addition, when the web is scraped off with a small number of blades 2 (about 4 blades), the point at which the web is peeled off on the doffer is the part B where the blades 2 are actually acting, and the part B where the blades 2 are acting, as shown in Figure 4. Since the web moves vertically between the parts A that are not covered, there is a drawback that thick and thin unevenness occurs on the web.

That is, as shown in FIG. 5, when the web 7 is spread out, a thin striped pattern 9 perpendicular to the traveling direction C of the web appears, which is a spot on the web.

Furthermore, if the tips of the blades 2 are made serrated as shown in FIG. 2, the force for hooking the web increases, so there is a drawback that winding is easy even if the number of blades 2 is small.

Secondly, the one shown in Japanese Patent Publication No. 48-9215 is considered.

As shown in FIG. 6, the web 7 on the docker 1 is stripped off by a stripping roller 11 covered with a card coating 10, and the web is transferred to crush rollers 14 and 15. However, since the web is difficult to separate from the stripping roller 11, it is necessary to provide a roller called a take-off roller 13 in the middle with a metallic wire 12 wound around it.
This has the disadvantage that the device becomes complicated.

Also, the card coating 10 wound around the stripping roller 11 cannot have deep teeth to facilitate the transfer of the web to the next take-off roller 13, and is If the web wraps around, it has the disadvantage of pushing down the teeth 16 of the docker 1.

Furthermore, since the web 7 is hooked by the teeth of the card coating 10 in the above device, hooks are generated in the fibers of the web 7, resulting in poor parallelism of the sliver and a deterioration in quality.

Third, a stripping device that does not use a card coating on a stripping roller is proposed in Japanese Patent Publication No. 41-4292.

This is a grooved stripping hanger as shown in Figure 7.
It is composed of a roller 17 and a web holding plate 18.

As shown in Fig. 8, the groove has a width a = 1 and a depth b at the tip.
= 1.5 rays, pitch p = 4.34 mm, and is provided on a roller with an outer diameter of 89 mm.

The web stripping device presses the web 7 with the web holding plate 18 and attaches it to the stripping roller 171C, thereby applying a web holding force to the stripping roller 17 and stripping the web on the docker 1. It is something.

However, in the above web stripping device, the web holding plate 18
and the contact point of the stripping roller 17.
It is thought that the peeling force will be improved if the stripping force is moved closer to , but the tip 19 of the Uni-Ruff presser plate 18 pushes the web 7 on the doffer 1 into the teeth 16 of the doffer 1.

On the other hand, this may make it difficult to remove because of the infiltration.

At the beginning of operation, the web 7 on the surface of the cytosofa-1 is peeled off by the groove of the stripping roller 17, and the web is pressed with the stripping roller 17.

At this time, if the working angle of the teeth 16 of the docker 1 is more than 60 degrees, the tip of the web at the beginning of operation cannot be brought to the contact point of the web plate 18, and therefore The disadvantage is that it cannot be done.

4.Furthermore, seed crumbs remain on the lower end E of the web holding plate 18 and adhere to the web 7 as described above at the start of operation. is the stripping roller 17
The disadvantage is that it must be cleaned regularly at short intervals because it adheres to the surface.

Furthermore, once the doffer 1 is stopped during spinning, the fibers on the doffer 1 are pushed between the teeth of the doffer 1 by the cylinder, so that the web 7 on the doffer 1 has a transverse linear portion. Thick unevenness occurred, and when the doffer 1 was started again, the thick unevenness could not be removed, and not only did the sliver = 1 break, but this thick uneven part remained on the dolpher as it was. The problem is that you will not be able to kiss again unless you remove the remaining thick unevenness.

Fourthly, in order to eliminate the above drawbacks,
A web stripping device shown in 1 has been considered;
As shown in Figures 9 and 10, this is the thickness of the tooth tip c-
2rft7IL, tooth depth d = 3 mm.

The web 7 on the docker 1 is stripped off by a stripping roller 21 with an outer diameter of 66 mm and having stripping teeth 20 with a pitch e = 9.42 mm and a working angle α = 80, and passed through a grooved take-off roller 22 to a crush roller. The configuration is such that the transition is made to 23.24.

In the above configuration, as shown in FIG. 9, since the web is caught and stripped by the sharp edges 25 of the stripping teeth 20, the web 7 on the docker 1 is reliably stripped, but the web 7 is not removed from the stripping roller 21. Because of the poor web separation, transition to crush rollers 23, 24 has the disadvantage that a take-off roller 22 must be installed in the middle, which complicates the apparatus.

Further, since the thickness of the tip is quite thick at 2 WtrIL, there is a drawback that when the web wraps around the stripping roller 21, the web 7 pushes the teeth 16 of the docker 1 and damages the wire.

As mentioned above, with conventional stripping devices, if the web stripping force is strong, it is difficult to separate the web, and a device is required to assist in separating the web, making the device complex and requiring work such as operation and maintenance. It has the disadvantage that it is complicated, and although the apparatus becomes simpler if the web separation is improved, the web stripping force becomes weaker and the web cannot be peeled off and cannot be used for production.

The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a card stripping roller that can reliably strip the web and has good separation from the web.

An embodiment of the present invention will be described below based on the drawings.

Example 1 As shown in FIG. 11, a toothless blade 27 made of carbon steel and having a tip thickness f of 0.2 mm was used at a working angle β-
90. A roller body 26 formed of a mild steel pipe so that the height of the flade is h=4 mm and the outer diameter is 81 mm.
, and further, the thickness of the tip f 'ii 0.2 m
A toothed blade 32 with teeth 33 having a tip width of 0.1 mm and a tooth height m of 0.8 mm is provided over the entire center so that there are 17 teeth in 1 inch. They are embedded in the roller main body 26 so that every two sheets have approximately the same outer diameter and a working angle of 00, and the tooth tip pitch is ! i' = 8
．． The card stripping roller 31 has a speed of 48 am.

The tips of the blades 27 and 32 are hardened and polished, and the edges F and G are extremely sharp.

However, the burrs caused by polishing are sufficiently removed to prevent fibers from getting caught.

Example 2 In Example 1, the toothless blade 27 made of layer-resistant alloy steel with a tip thickness f of 0.3 mm was
= 95, the height of the flade h = 511L7IL, the outer diameter is 92 mm, and the roller is embedded and fixed in the main body 26, which is a solid roller made of thermosetting synthetic resin, and the thickness of the tip is f.
/! 51.2 elbows, tip width 0.2 mm, tooth inclusion angle γ
is 30, the tooth length m is 1.0, and the tooth working angle is 15
A toothed blade 32 made of steel having 10 teeth 33 having a lug 20 in each inch is attached to the roller body 26 so that every fourth toothless blade 27 has a height of 0.2 mw higher.
A card stripping roller 31 is constructed by embedding the card in the card strip and setting the tooth tip pitch g to 9.63 mTR.

Example 3 A roll made of high carbon tool steel was machined by cutting, etc., the thickness of the tip was f = o, 5 mrn, the working angle was β-93, and h = 2.
5mm toothless blade 27 and tip thickness f'・0.3
mm, the width of the tip is 0.511!7M, the height of the tooth m is 0
．． 5 teeth 33 with 6 teeth in 1 inch, and working angle β type 1
30 toothed blades 32 are formed integrally with each other, and the toothed blades 32 are placed every eight toothless blades 27 and have a height of 0.
．． A card stripping roller 31 is configured to have a tooth tip pitch l-10, 21ftrIL, which is 2 mm lower.

In each of the above embodiments, a toothless blade and a blade with one tooth were used, and a toothed blade was arranged every one or more of the toothless blades, but the teeth were not provided over the entire width of one blade. By providing them at appropriate intervals, or by providing them in one part and appropriately combining them and arranging them in one roller body, the teeth on the roller surface can be formed in a staggered or spiral shape as shown in Fig. 14 A2. It is also possible to configure it so that it becomes .

Further, in the above embodiment, each blade is provided parallel to the axis, but it may be provided in a slightly spiral shape.

1 The thickness of the tip of the blade is 0.1 to 6ψ, and the height of the toothless blade from the surface of the roller body is 2m/m to 10m.
/m, and the height of the toothed blade is within ±0.7 m/m of the height of the toothless blade.

Further, the pitch of the teeth in the axial direction is 5 to 20 threads per inch.

Card stripping roller 3 configured as in the above embodiment
1 is combined with smooth surface lash rollers 28 and 29 each having an outer diameter of 75 mm to constitute a web stripping device, as shown in FIG.

In the stripping device, the docker 1, the card stripping roller 31, and the crush roller 28 rotate in the same direction, and the crush roller 29 rotates in the opposite direction to the roller.

In addition, the surface speed of the card stripping roller 31 is
3 to 10% from the surface speed of 1, crush roller 28
The surface speeds of the card stripping rollers 31 are such that they each rotate 3 to 10% faster than the surface speed of the card stripping roller 31.

When spinning under the above conditions, the mutual relationship between the web 7 and the blades 27, 32 of the card stripping roller 31 at the points in FIG. 12 is as shown in FIG. 13.

That is, during steady operation, the thin tips of the blades 27 and 32 wedge into the web 7 having a certain thickness, and this wedge effect causes the blades 27 to
The web is peeled off from the surface of the doffer 1 because the frictional force between the doffer 1 and the fibers 30 of the web 7 overcomes the frictional force between the teeth 18 of the doffer 1 and the fibers 30 of the web 7.

In addition to the above, for example, after the machine has been stopped for a day and night,
Alternatively, when restarting the doffer 1 after a certain period of time has elapsed after the rotation of the doffer 1 has been stopped, the fibers are forced between the teeth of the doffer 1 and the toothless blade 27 alone cannot sufficiently tR, but the toothed blade 32 The fibers are completely stripped off by the teeth, and the operation shifts to the above-mentioned steady state.

In addition, if the web separation is poor, provide the crush roller with a spiral groove of about 4 mm wide and 1 mm deep, and make sure that the hair in the groove is approximately the same height as the cylindrical surface of the crush roller, or lower. Brush so that
If a strip of non-woven fabric or felt or a perforated tape is used, the transfer of the web from the card peeling roller to the crush roller will be even better.

In the embodiment described above, the web swells at the edge H on the working side of the blade, and the wedge effect is significant in this area.

Also, the smaller the blade tip thickness f, f', the greater the wedge effect; conversely, the smaller the tip thickness fj
If f' is increased, the web is pushed away by the tip of the blade and the wedge effect becomes smaller.

When the thickness f and fθ of the tip of the blade exceeds 6 myt, the web is pushed away, the wedge effect is no longer exhibited, and the web cannot be peeled off.

Furthermore, if the height h of the blade becomes lower, the fibers 30 of the web 7 will hit the cylindrical surface and push the web 7 down, reducing the wedge effect, so that the height h of the blade becomes 2W.
When the thickness is less than 7 ft, the wedge effect is lost and the stability of the stripping process is impaired.

Regarding the pitch g, if the pitch g is made larger than 15, there will be a disadvantage that horizontal stripes will appear on the web as explained in the conventional example, and if it is made smaller than 2, the pocket J consisting of the blade 27 and the cylindrical surface will be When the web rolls up on the card stripping roller 31, it becomes smaller.
This increases the risk of damaging the tooth 18 of No. 1, and has the drawback that the wedging effect is small and the web cannot be peeled off, as in the case of the tip thicknesses f and f'.

Regarding the working angles β and β', the more obtuse the angle to the rotation direction, the better the separation of the webs, but if the working angles are too large, the reaction force received from the working surface of the blade 27 approaches the diametrical direction of the roller. Therefore, the web is pushed up from the working surface of the blade and the wedge effect becomes 0, and the working angle β
The best tl is 90 to 130.

Regarding the finishing condition of the tip of the blade, if there are any particles left on the tip of the blade, the web will never separate, so if the edges are completely removed and a sharp edge is created, even better spinning will be achieved. It is something.

Since the present invention is constructed as described above, it is possible to exert an appropriate peeling force based on the wedge effect and appropriate separation of the web, and it is possible to reliably remove the web from the docker in any case, and also to reliably remove the web from the crush roller. can be moved to.

In addition, even if it is difficult to peel off due to work conditions, etc., the tips f and f' of the blade can be made extremely small and the working angles β and β'
The effect is extremely large, such as the ability to improve the peeling force by making the value close to 90.

[Brief explanation of drawings]

Figures 1 to 10 are conventional examples, Figures 1, 6, 7, and 10 are configuration diagrams of a group of rollers of a web stripping device, and Figures 2 and 3 are respectively A front view and a side view of the stripping roller, FIG. 4 is an explanatory diagram showing the stripping action of the web stripping device, FIG. 5 is a perspective view showing stripes on the web, and FIGS. 8 and 9 are stripping Partially enlarged views of the roller, FIGS. 11 to 14 show an embodiment of the present invention,
FIG. 11 is a partially enlarged side view showing an embodiment of the card peeling roller of the present invention, FIG. 12 is a side view showing the arrangement of a peeling device using the card peeling roller of the present invention, and FIG.
The figure is an explanatory diagram showing the action of the card stripping roller of the present invention, and FIG. 14A is a structural diagram of the stripping roller showing different embodiments. 1... Dotufa-12... Feather, 3.
...Guide roller, 4...Trumpet, 5.6...Calendar roller, 7...
...Web, 8...Roller, 9...
...Striped pattern, 10...Card covering, 11゜17
．． 21... Stripping roller, 12...
...Metallic wire, 13,22...Take-off roller, 14.15,23,24,28.2
9... Crash roller, 16...
Teeth, 18... Web presser plate, 19...
・Tip of web holding plate, 20... Stripping teeth,
25...Sharp edge, 26...Roller body, 27...Toothless blade, 30...
... Fiber, 31 ... Card stripping roller, 32 ... Toothed blade, 33 ... Teeth.

Claims (1)

[Claims] 1 A toothed blade and a toothless blade are provided on one roller body at a working angle of 90 to 130 degrees with respect to the rotational direction of the roller and with a pitch of 2 to 15 degrees, and the toothed blade is provided as a toothless blade. A card stripping roller is provided for each one to a plurality of cards.