JPH0465529A - Winder for lap-forming machine - Google Patents

Abstract

PURPOSE:To decrease interweb lickings by tilting forward by a specified angle the moving locus of the rotational center of a lap bobbin to the perpendicular bisector for the line mutually connecting the respective centers of the front and rear winding drums. CONSTITUTION:The moving locus (a) of the rotational center of a lap bobbin 3 is tilted forward by a specified angle theta (about 1 to 10 degrees) to the perpendicular bisector (c) for the line mutually connecting the respective centers of the front and rear winding drums 1, 2 to decrease the pressing degree for laps by the winding drum 2 accruing from the increase in the lap-winding diameter, thus reducing the backward swelling of the laps.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a winding device for a wrap forming machine that forms a wrap to be applied to a comb.

BACKGROUND OF THE INVENTION Conventionally, this type of winding device has a winding drum (winding roll) that is rotated in the same direction and a pair of winding drums (winding rolls) that are rotated in the same direction, as disclosed in Japanese Patent Application Laid-Open No. 60-155723. A support body (support arm) that is vertically movably supported on both left and right sides of the drum and rotatably supports the lamp bobbin placed on the single-winding drum, and a pressurizing means for urging the support body downward. (cylinder), the wrap bobbin on the winding drum is rotated by the rotation of the winding drum with pressure applied to the outer peripheral surface of the winding drum, and the web fed from the calender roller is wound around the lap bobbin. Stir to form a wrap. The above-mentioned support is a perpendicular bisector C of the line b' connecting the center of rotation of the wrap bobbin with the centers of the front and rear winding drums.
It is supported so that it can move on the winding roller, so that even when the winding diameter of the wrap increases, the pressure applied to the front and rear winding rollers remains the same.

Problems to be Solved by the Invention In the above conventional winding device, as shown in FIG.
The rotating bobbin 3E is rotated by the winding drums IE and 2E.
When winding the web U', as the winding diameter of the wrap L' increases, the depression of the portion of the wrap L' that is in contact with the winding drums IE and 2H becomes larger, and the winding is carried out on the upper outer periphery of the wrap. There was a problem in that the web U' was loosened, causing the wrap L' to swell significantly toward the rear, and licking occurred between the webs, deteriorating the quality of the wrap. An object of the present invention is to solve the above problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a pair of winding drums, a front and a rear winding drum that are rotated in the same direction, and a pair of winding drums that are vertically movably supported on both left and right sides of the winding drums. , a support body that rotatably supports a wrap bobbin placed on a pair of winding drums, and a pressurizing means that biases the support body downward to press the lap bobbin against the outer peripheral surface of the winding drum. In the winding device of the wrap forming machine equipped with the above-mentioned support, as the wrap diameter increases, the movement locus of the wrap bobbin tilts forward at a predetermined angle with respect to the perpendicular bisector of the line connecting the centers of the winding drum. It is characterized by being supported as follows.

Operation When the wrap bobbin is pressed against the pair of winding drums by the pressure means and the winding drums are rotated in the same direction, the wrap bobbin is rotated by the winding drum and the web is wound around the lap bobbin.

As the web is wound onto the lap bobbin and the lap diameter gradually increases, the lap tends to expand significantly toward the rear, but the locus of the center of rotation of the lap bobbin, which is raised by the increase in the lap diameter, changes back and forth. The winding drum is tilted forward at a predetermined angle with respect to the perpendicular bisector of the line connecting the centers of the winding drums, so as the wrap bobbin rises, the distance from the center of the wrap to the outer periphery of the rear winding drum increases. The distance gradually becomes larger than the distance from the center to the outer periphery of the front winding drum, and as a result, the indentation of the wrap caused by the rear winding drum becomes smaller, the above-mentioned bulge becomes smaller, and licking of the wrap can be reduced.

Embodiment FIG. 1 shows a winding device of a wrap forming machine in which the present invention is implemented. In the drawings, reference numerals 1 and 2 denote a pair of front and rear winding drums rotatably supported by a frame (not shown), which are rotated in the same direction indicated by arrows by a drive device (not shown). These winding trams 1, 2 are generally arranged such that the front winding drum 1 is lower than the rear winding drum 2 in order to facilitate the discharge of the lap L after being formed. 3 indicates a wrap bobbin that is supplied onto the winding drums 1 and 2 and placed on the winding drums 1 and 2.

Support bodies 4 are vertically movably supported on the sides of the winding drums 1.2 and are disposed on both left and right sides of the winding drums 1 and 2, respectively. As is well known, a cylinder body of a clamp cylinder (not shown) is fixed to the upper end of the support 4 on the rear side, and a lap plate 5 that contacts the end surface of the lap bobbin 3 is rotatably attached to the piston rod of the clamp cylinder. installed on. Further, four guide rollers 6 are rotatably supported on the upper part of the support body 4, and these guide rollers 6 are movable up and down by a pair of guide rails 7.7 fixed to a frame (not shown). being guided. The guide direction of the support body 4 by the guide rails 7.7 is determined by the direction in which the movement locus a of the rotation center of the wrap bobbin 3 as the ramp diameter of the wrap L increases is a line connecting the centers of the front and rear winding trams 1 and 2. It is set to be tilted forward by a predetermined angle θ with respect to the perpendicular bisector C. According to experiments, this angle θ is 1
The angle is preferably about 10 degrees, but is not limited to this.

A rack 8 is fixed to the lower end of the support 4, teeth 8a of the rack 8 are engaged with a pinion 10 on a transmission shaft 9 supported on the frame, and a back surface 8b of the rack 8 is pivotally supported on the frame. It is guided by guide rollers 11 that are attached to each other. Reference numeral 14 denotes a pressurizing fluid cylinder for pressurizing the wrap bobbin 3 against the outer circumferential surfaces of the winding drums 1 and 2. Its cylinder body 14a is fixed to the frame, and a rack 15 is fixed to the piston rod 14b. This rack 1
5 is meshed with a pinion 16 on the transmission shaft 9.

The above rack 8, pinion 1o, transmission shaft 9, pinion 16
, the rack 15 and the pressurizing fluid cylinder 14 are the pressurizing means 1
8. In addition.

The pressurizing means may be constituted by a fluid cylinder that directly urges the support body 4 downward. Reference numeral 20 indicates a well-known calender roller, which feeds the web U to be wound around the wrap bobbin 3.

Next, the operation of the winding device having the above configuration will be explained. Wrap bobbins 3 are supplied onto the front and rear winding drums 1.2,
After winding the end of the web U coming from the calendar roller 20 around the wrap bobbin 3 and placing it on the winding drums 1 and 2, the pair of left and right clamp cylinders are activated, and the wrap plates 5 on both sides are individually wrapped. The wrap bobbin 3 is held in contact with the end surface of the bobbin 3. In addition, the clamping fluid cylinder 14 is actuated by compressed air or the like to bias the piston rod 14b in a protruding direction, and this biasing force is applied to the rack 15, pinion 16, transmission shaft 9, and pinion 1.
0 and is transmitted to the support body 4 via the rack 8 and the support body 4
is urged downward, and as a result, the rack bobbin 3 is pressed against the outer peripheral surfaces of the winding drums 1 and 2. In this state, the center of rotation of the wrap bobbin 3 is located on the perpendicular bisector C, and the rack bobbin 3 is pressurized almost equally against the outer peripheral surfaces of the front and rear winding drums 1 and 2. In this pressurized state, the winding tram 1-2 is rotated in the direction of the arrow, and the calender roller 20 is also rotated, and the rotation of the winding drums 1 and 2 rotates the wrap bobbin 3 in the direction of the arrow, and the web U is rotated. The wrap L is wound around the outer periphery of the wrap bobbin 3.

As the wrap diameter of the wrap L increases, the wrap bobbin 3 moves the support body 4 upward against the urging force of the pressurizing fluid cylinder 14. In this case, the support body 4 is supported such that the movement locus a of the rotation center of the wrap bobbin 3 is tilted forward at a predetermined angle θ with respect to the perpendicular bisector C of the line connecting the centers of the winding drums 1 and 2. Therefore, as the support body 4 is moved upward, the distance m between the center of the wrap L and the outer circumferential surface of the rear winding drum 2 becomes smaller than the distance n between the center of the wrap L and the outer circumferential surface of the front winding drum 1. growing. As a result, the wrap L wound around the wrap bobbin 3 is strongly pressed against the front winding drum 1, as shown by the imaginary line in FIG. The rear winding drum 2 becomes smaller.
The concavity (pressing) of the wrap L due to this becomes smaller, and the rearward bulge of the wrap L becomes smaller. Therefore, lap L
The quality of the wrap L can be improved by preventing licking between the webs during winding.

Effects of the Invention As described above, in the present invention, the locus of movement of the rotation center of the wrap bobbin is tilted forward at a predetermined angle with respect to the perpendicular bisector of the line connecting the centers of the front and rear winding drums. Therefore, as the lap winding diameter increases, the distance from the center of the wrap to the outer periphery of the rear winding drum becomes larger than the distance from the center of the wrap to the outer periphery of the front winding drum, which causes the rear winding drum to hold down the wrap. This has the effect of reducing the backward bulge of the wrap, reducing licking between the webs, and improving the quality of the wrap.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a sectional view showing a winding device of a lap forming machine, and FIG. 2 is an explanatory diagram showing the operation of a conventional device.

Claims (1)

[Claims] 1. A pair of front and rear winding drums are rotated in the same direction, and a wrap bobbin placed on the pair of winding drums is supported so as to be vertically movable on both left and right sides of the winding drums. In a winding device of a wrap forming machine, the winding device of a wrap forming machine is equipped with a support supported on the winding drum, and a pressure means for urging the support downward to press the wrap bobbin against the outer circumferential surface of the winding drum. A winding wrap forming machine characterized in that the wrap bobbin is supported so that its movement locus as the wrap diameter increases is tilted forward at a predetermined angle with respect to a perpendicular bisector of a line connecting the centers of a winding drum. removal device.