JP2825943B2 - Wrapping machine winding machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for a wrap forming machine that forms a wrap to be placed on a comber.

2. Description of the Related Art Conventionally, a winding device of this type includes a pair of winding drums (winding rolls) before and after rotating in the same direction as disclosed in Japanese Patent Application Laid-Open No. 60-155723. A support (support arm) rotatably supported on the right and left sides of the drum and rotatably supporting the wrap bobbin mounted on the winding drum, and a pressurizing means for urging the support downward. (Cylinder), the wrap bobbin on the winding drum is rotated by the rotation of the winding drum while pressing the outer peripheral surface of the winding drum, and the web sent from the calendar roller is wound around the wrap bobbin. A wrap is formed. The support is supported such that the center of rotation of the wrap bobbin moves on a vertical bisector c 'of a line b' connecting the centers of the front and rear winding drums, even when the winding diameter of the wrap increases. The pressure applied to the front and rear winding rollers is the same.

Problems to be Solved by the Invention In the above-described conventional winding device, as shown in FIG. 2, when the web U 'is wound around the wrap bobbin 3E by the rotation of the winding drums 1E and 2E, the wrap L' Of the wrap L 'in the portion in contact with the winding drums 1E and 2E increases as the winding diameter of the wrap L increases, and the web U' wound around the upper peripheral portion of the wrap becomes slack and the wrap L ' However, there is a problem in that the wrap is greatly swollen to the rear side, and licking occurs between the webs to deteriorate 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 is to rotate in the same direction, before the front winding drum is lower than the rear winding drum, a pair of rear winding drums, On both left and right sides of the take-up drum, are guided vertically by a guide rail,
A support for rotatably supporting the wrap bobbin placed on the pair of winding drums; and a pressing means for urging the support downward to press the wrap bobbin against the outer peripheral surface of the winding drum. In the winding device of the lap forming machine, the support is configured such that a movement trajectory of the wrap bobbin rotatably supported by the support with an increase in the wrap diameter is a line connecting the centers of the pair of winding drums. It is characterized by being guided by the guide rail so as to form a straight line inclined at a predetermined angle to the front winding drum side with respect to the vertical bisector.

When the winding drum is rotated in the same direction while the wrap bobbin is pressed against the pair of winding drums by the pressing means,
The wrap bobbin is rotated by the winding drum, and the web is wound on the wrap bobbin. When the web is wound on the wrap bobbin and the wrap diameter gradually increases, the wrap tends to inflate to the rear side. Is inclined to the front winding drum side by a predetermined angle with respect to the vertical bisector of the line connecting the centers of the winding drums, so that the wrap center moves from the wrap center to the outer periphery of the rear winding drum as the wrap bobbin rises. Becomes gradually larger than the distance from the center of the wrap to the outer periphery of the front winding drum. As a result, the dent of the wrap caused by the rear winding drum is reduced, and the bulge is reduced, and licking of the wrap can be reduced.

Embodiment FIG. 1 shows a winding device of a lap forming machine embodying the present invention. In the drawings, reference numerals 1 and 2 denote a pair of winding drums before and after being rotatably supported by a frame (not shown). These winding drums 1 and 2 are generally arranged such that the front winding drum 1 is lower than the rear winding drum 2 in order to easily discharge the formed wrap L. Reference numeral 3 denotes a wrap bobbin supplied on the winding drums 1 and 2 and placed on the winding drums 1 and 2.

Reference numeral 4 denotes a support which is supported on the sides of the winding drums 1 and 2 so as to be vertically movable, and is disposed on each of the left and right sides of the winding drums 1 and 2. A cylinder body of a clamp cylinder (not shown) is fixed to the upper end of the support 4 on the back side, as is well known, and a lap plate 5 that contacts the end surface of the lap bobbin 3 on the piston rod of the clamp cylinder is rotatable. Mounted on In addition, four guide rollers 6 are rotatably supported on the upper part of the support body 4, and these guide rollers 6 are vertically movable by a pair of guide rails 7, 7 fixed to a frame (not shown). You are being guided. The guide direction of the support 4 by the guide rails 7, 7 is
The movement trajectory a of the rotation center of the wrap bobbin 3 accompanying the increase in the wrap diameter of the wrap L is inclined by a predetermined angle θ to the front side with respect to a vertical bisector c of a line b connecting the centers of the front and rear winding drums 1 and 2. It is set as follows. According to experiments, this angle θ is 1 to 10
Although the degree is preferable, it is not limited to this.

A rack 8 is fixed to the lower end of the support 4, and teeth 8 a of the rack 8 are engaged with a pinion 10 on a transmission shaft 9 supported by a frame, and a rear surface 8 b of the rack 8 is supported by the frame. Guide rollers 11 are provided. 14 is a pressurizing fluid cylinder for pressurizing the wrap bobbin 3 against the outer peripheral surfaces of the winding drums 1 and 2, and the cylinder body thereof
14a is fixed to the frame, and the rack 15 is fixed to the piston rod 14b. The rack 15 is engaged with a pinion 16 on the transmission shaft 9. The rack 8, the pinion 10, the transmission shaft 9, the pinion 16, the rack 15, and the pressurizing fluid cylinder 14 constitute a pressurizing unit 18. The pressurizing means may be constituted by a fluid cylinder which urges the support 4 directly downward. Reference numeral 20 denotes a known calendar roller, which feeds a web U to be wound around the wrap bobbin 3.

Next, the operation of the winding device having the above configuration will be described.
The wrap bobbin 3 is supplied onto the front and rear winding drums 1 and 2,
After the end of the web U coming out of the calendar roller 20 is wound around the wrap bobbin 3 and placed on the winding drums 1 and 2, a pair of right and left clamp cylinders are respectively operated to wrap the lap plates 5 on both sides. The wrap bobbin 3 is held by being brought into contact with the end surface of the bobbin 3. The clamping fluid cylinder 14 is actuated by compressed air or the like to urge the piston rod 14b in a protruding direction, and this urging force is transmitted through the rack 15, the pinion 16, the transmission shaft 9, the pinion 10, and the rack 8 through the support member. 4, the support 4 is urged downward, and as a result, the wrap 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 vertical bisector c, and the wrap bobbin 3 is pressed substantially evenly on the outer peripheral surfaces of the front and rear winding drums 1 and 2.
In this pressurized state, the winding drums 1 and 2 are rotated in the direction of the arrow, and the calendar roller 20 is rotated.
The wrap bobbin 3 is rotated in the direction of the arrow by the rotation of the wrap bobbin 3, and the web U is wound around the wrap bobbin 3.
Is formed.

As the wrap diameter of the wrap L increases, the wrap bobbin 3 moves the support 4 upward against the urging force of the pressurizing fluid cylinder 14. In this case, the support 4 is a straight line in which the movement trajectory a of the rotation center of the lap bobbin 3 is inclined by a predetermined angle θ forward with respect to the perpendicular bisector c of the line b connecting the centers of the winding drums 1 and 2. As the support 4 is moved upward, the distance m between the center of the wrap L and the outer peripheral surface of the rear winding drum 2 becomes longer as the support 4 moves upward. Is larger than the distance n with respect to the outer peripheral surface. As a result, the wrap L wound on the wrap bobbin 3 is strongly pressurized by the front winding drum 1 as shown by a virtual line in FIG. As a result, the depression (pressing) of the wrap L by the rear winding drum 2 is reduced, and the rearward bulge of the wrap L is reduced. Therefore, it is possible to prevent the occurrence of licking between the webs when the wrap L is wound up, thereby improving the quality of the wrap L.

Effect of the Invention As described above, in the present invention, the movement trajectory of the rotation center of the wrap bobbin is at a predetermined angle to the front winding drum side with respect to a vertical bisector of a line connecting the centers of the front and rear winding drums. 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 as the wrap winding diameter increases. There is an effect that the pressing of the wrap is reduced, the bulge to the rear of the wrap can be reduced, the licking between the webs can be reduced, and the wrap quality can be improved.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a sectional view showing a winding device of a lap forming machine, and FIG. 2 is an explanatory diagram showing an operation of a conventional device. DESCRIPTION OF SYMBOLS 1 ... Front winding drum, 2 ... Rear winding drum, 3 ... Lap bobbin, 4 ... Support body, 18 ... Pressurizing means, a ... Moving locus, c ... Vertical two etc. Branch line

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Claims (1)

(57) [Claims] 1. A pair of winding drums, which are rotated in the same direction and the front winding drum is lower than the rear winding drum, and a pair of rear winding drums. A support that is movably guided and rotatably supports a wrap bobbin mounted on a pair of winding drums, and biases the support downward to press the wrap bobbin against the outer peripheral surface of the winding drum. A wrap forming apparatus having a pressurizing means, wherein the support has a movement trajectory accompanying an increase in a wrap diameter of a wrap bobbin rotatably supported by the support, wherein the pair of winding drums A winding line for a lap forming machine, wherein the guide rail is guided by the guide rail so as to form a straight line inclined at a predetermined angle toward the front winding drum with respect to a vertical bisector of a line connecting the centers of the wrap forming machine.