JPH0143411Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a web peeling device for a carding machine that peels off the web on a cloth.

(Prior Art) The number of rotations of peelers continues to increase, and conventional flycom type peelers cannot keep up with such high-speed operation, so various rotary type peeling devices have been proposed.

For example, in the device disclosed in Japanese Patent Publication No. 58-24529, as shown in FIG. The structure is such that the web w on the dot c is peeled off by being caught by the tips of the toothed and toothless blades b, and the web w is transferred. In addition, in the device disclosed in Japanese Utility Model Application No. 58-168576, as shown in FIG. 8, the metal clothing d is caught by the needles of the peeling roller a covered with which the web w is peeled and transferred. I'm going.

Apart from these, the one shown in FIG. 9 is also known. This is because the peeling roller a, which has a large number of grooves g in the axial direction, guides the web w on the dot c by the engagement of each groove g, and is urged to come into pressure contact with the peeling roller a. The web w is held under pressure between the blade f and the web w is securely separated and transferred.

(Problems to be solved by the invention) In the above conventional example, the web w on the cutter c is peeled off with a metal sharp object such as a toothed or toothless blade b or a metal cloth d, and the web w is transferred. Since the web w is strongly caught, another peeling roller must be provided in order to peel off the web w hooked and held by the peeling roller a again.
There is a problem that the peeling device becomes complicated. In addition, the metal sharp objects are easily worn out, and the webbing (w) on which leaf debris, insect excrement, etc. adhere is difficult to catch, making it difficult to maintain a certain level of peeling performance over a long period of time. There is a problem. Furthermore, when attempting to remove the dust or manually touching webs or fibers, there is a risk that the operator may come into contact with sharp metal objects and be injured or become entangled.

On the other hand, in a conventional example using a peeling roller a in which a large number of grooves g are formed, although the above-mentioned problems caused by metal sharp objects are solved, the rotating peeling roller a
There is also the problem that the contact surfaces of the blade f that come into pressure contact with this are likely to wear out. In addition, foreign matter such as leaf litter and insect excrement is mixed in the web w being transferred, and this tends to adhere and accumulate on the blade f that squeezes the web fibers on the stationary side. The adhesion of such foreign matter impedes the passage of the fibers, and if the adhesion is localized, the gap between the blade f and the peeling roller a is lifted at a portion other than the part where the foreign matter is attached, causing the web w to come off. This poses a problem in that it hinders the smooth separation and transfer of the web w. Moreover, such a peeling roller a has a large number of grooves g formed therein, making it expensive.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a pair of small diameter and large diameter rollers that are close to each other from above and below, with the small diameter roller at the top being close to the dot and the roller pair being close to each other from above and below. The proximal point is arranged so that the distance does not exceed one fiber length on the web path to be separated from the web surface, while the upper small diameter roller has one to three spiral grooves that go around the side circumferential surface between both ends, or a matte finish, etc. It is characterized in that it is formed into a substantially smooth shape with slight web catching, and the lower large-diameter roller has a smooth side circumferential surface.

(Function) According to the present invention, when the web held and transferred by the doffor surface reaches a point close to the small diameter roller, the web is moved by the counter-rotating surface of the small diameter roller and by the spiral groove or satin finish of the web. With the help of the almost smooth side circumferential surface that has only a slight amount of engagement,
The dot is guided to be peeled off from the dot surface toward a point close to the pair of rollers. This web is further guided by a pair of rollers to its proximate point and is conveyed by being nipped by said pair of rollers. The web fibers that are separated from the cloth surface and are pinched by the pair of rollers at a proximal point not exceeding one fiber length on the web path are still entangled with the web on the cloth, so that the web fibers are not removed by the pair of rollers. The web on the dosing pad can be peeled off during transport. Moreover, the small-diameter roller has one to three spiral grooves that constantly approach the web at one to three points in the axial direction, or has a substantially smooth side surface formed on a satin finish, etc., which prevents the web from peeling off. make it more reliable. However, in either case, since the web is formed in a substantially smooth shape with only a slight amount of catching, the web does not easily wind around the small-diameter roller. Also, the diameter of the large-diameter roller that receives the web fibers from below should be made larger to accommodate the smaller diameter of the small-diameter roller within the limit that the proximity point of these roller pairs does not exceed one fiber length on the path of the peeled web from the document surface. Since the side circumferential surface is smooth, winding of the web fibers can be prevented. Furthermore, both the small diameter roller and the large diameter roller move in synchronization with the web, and the small diameter roller is substantially smooth and the large diameter roller is smooth, making it difficult for leaf debris and insect excrement to adhere to it. be able to.

(Example) An example of the present invention will be described based on FIGS. 1 to 6.

The symbol 1 in FIG. 1 is a doffor, in which a small-diameter top roller (small-diameter roller) 2 is placed close to the doffor 1, and a large-diameter bottom roller (large-diameter roller) 3 is arranged below the top roller 2. There is. A clearer roller 4 is disposed above the top roller 2, and has the function of removing the web w that should have wound around the top roller 2 by winding it up onto the clearer roller 4 itself. Further, when the clearer roller 4, which moves in the direction of the arrow in accordance with the amount of web W taken up, reaches a predetermined position, this is detected and the operation of the carding machine is stopped. Incidentally, instead of the clearer roller 4, a non-rotating rubber pad type clearer may be brought into pressure contact.

The side peripheral surface 2a of the top roller 2 has one spiral groove 5 carved therein as shown in FIG.
The other portions of the side circumferential surface 2a are formed in a smooth shape.
The spiral groove 5 has a cross-sectional shape shown in FIG. 3, and has a strong engagement with the web w in the direction of rotation of the top roller 2 shown by the arrow, making it easy to peel off the web w. Further, the number of spiral grooves 5 is 1 to 3.
You can choose as appropriate within the scope of the book. The spiral groove 5 can also have various cross-sectional shapes as shown in FIGS. 4, 5, and 6. At this time, as the number of spiral grooves 5 increases, it is preferable to make the shape smoother. If the peeling force is adjusted while the edges are chamfered 5a like the spiral groove 5 in FIG. 6, variations in peelability due to edge wear will not occur. This can be applied to any shape of helical groove. The side circumferential surface 3a of the bottom roller 3 is formed to be smooth and has a large diameter, which together with the fact that the side surface 3a of the bottom roller 3 improves the peelability of the web w.

In this embodiment, the diameter of the top roller 2 is 35
mm, the diameter of the bottom roller is 75 mm, and the circumferential speed ratio of each roller 2 and 3 to the dot 1 is 1.1 times.
Even with the use of the same method, the paper 1 exhibited reliable and smooth web stripping performance up to fairly high speed rotation. In addition, the gauges of Totsu Prora 2 and Dotu Fur 1 are approx.
The gauge of the top roller 2 and bottom roller 3 was approximately 0.1 mm. A sufficiently wide gauge is provided between the bottom roller 3 and the printer 1 so as not to affect the web w carried on the surface of the printer 1.

The present invention can be configured in various ways other than those shown in the above embodiments. For example, in the embodiment described above, a spiral groove is formed on the side circumferential surface of the small diameter roller, but it can be formed into any substantially smooth surface that is slightly susceptible to webbing, such as a rough surface such as a so-called satin surface.

(Effect of the invention) Since the present invention has the above-mentioned structure and operation, the blade rotates at high speed by a substantially smooth small-diameter roller and a smooth large-diameter roller that do not use metal sharp objects such as metal clothing. Since it is possible to reliably separate and transfer the web on the paper being removed, the drawbacks of conventional methods that use metal sharp objects and members that come into stationary contact with the web are eliminated, and the separation and transfer function is not hindered. It is possible to provide a web stripping device for a carding machine that can maintain a constant stripping performance over a long period of time, has a simple structure, is inexpensive, and is safe.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a perspective view of the small diameter roller, Fig. 3 is a vertical sectional view of the small diameter roller, and Fig. 6 is a modification of the small diameter roller without Fig. 4. FIGS. 7 to 9 are side views showing conventional examples. 1...Dotshua, 2...Small diameter roller, 2a...
Side circumferential surface, 3... Large diameter roller, 3a... Side circumferential surface, 5
...Spiral groove, w...web.

Claims (1)

[Scope of utility model registration request] A pair of small-diameter and large-diameter rollers that are close to each other from above and below are arranged such that the upper small-diameter roller is close to the dot and the point of proximity of the roller pair does not exceed one fiber length on the separation web path from the dot surface. On the other hand, the upper small-diameter roller has one to three spiral grooves that go around its side circumferential surface between both ends, or is formed into a substantially smooth shape with a slight wetting, such as a satin finish, and the lower large-diameter roller is formed on its side. A web stripping device for a carding machine characterized by having a smooth peripheral surface.