JPH10152251A - Winding core supporting device for slitter winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a core from being firmly pressed by a chuck on each side and deflected by winding the strip-shaped sheet of various width from a narrow sheet to a wide sheet with excellent quality at high speed, to simplify the structure, and to improve the load resistance. SOLUTION: A pair of chucks 8, 9 are provided with collars 8b, 9b on the rear side of body parts 8a, 9a to be inserted in a core C, and mounted on a pair of winding arms 5, 6 moving along a guide surface. A pair of winding arms 5, 6 are provided with a pair of spindles 17, 18 opposite to each other, inner rings 19a, 20a of a roller bearing to support the spindles 17, 18 are fixed to the spindles 17, 18, outer rings 19b, 20b of the roller bearing to support one spindle 18 are held slidably in the axial direction of the spindles, the outer ring 20b is energized toward the core C by a spring 32, and the outer ring 19b of the roller bearing to support the other spindle 17 is held in an immobile manner in the axial direction of the spindle. A pair of chucks 8, 9 are individually fixed to a tip part of a pair of spindles 17, 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core tube supporting device for supporting a core tube in a slitter winding machine for winding a belt-shaped sheet around individual core tubes while dividing the sheet into a plurality of strips with a slitter. More particularly, the present invention relates to a device that supports a core tube by engaging a pair of chucks mounted opposite to a pair of winding arms with both ends of the core tube.

[0002]

2. Description of the Related Art Conventionally, a core tube supporting device for a slitter winder of the above-mentioned type is designed to increase the winding speed and to obtain a heavy winding roll. For example, as disclosed in Japanese Patent Application Laid-Open No. 1-365964, there is a type in which a pair of chucks are mounted so as not to slide on a winding arm in the axial direction of a core tube. In this device, when supporting the core tube, the distance between the pair of winding arms is reduced by the moving mechanism, and the body is inserted into the hollow portion of the core tube until the flange portion of the chuck contacts the end surface of the core tube. Then, when releasing the core tube from the chuck, the moving mechanism widens the interval between the pair of winding arms, and removes the body of the chuck from the hollow portion of the core tube.

When the core tube is mounted on the chuck, the movement of the winding arm is automatically stopped by detecting that the body of the chuck has been securely inserted into the hollow portion of the core tube. In some cases, a spindle is attached to the take arm so as not to slide in the axial direction, and a chuck is slidably attached to the tip of the spindle so that a sensor is activated when the chuck is retracted with respect to the spindle.

[0004]

However, the winding core tube supporting device in which the chuck is supported on the winding arm so as not to slide in the axial direction of the core tube has the following disadvantages. That is, when the take-up arm is moved by manually operating the moving mechanism, it is difficult to accurately position the take-up arm at the target position, and the take-up arm may overrun from the proper position or stop before the proper position. Then, the interval between the flanges of the pair of chucks may be slightly longer or shorter than the length of the core tube. When the distance between the flanges of the pair of chucks is shorter than the length of the core tube, the core tubes held by the pair of chucks are bent by receiving clamping force from the flange portions of the chucks. In particular, when the core tube is a paper tube, it is easily bent. Then, the bending of the core tube causes whirling of the core tube during winding, causing the core tube to vibrate and causing winding defects such as uneven end faces of the winding roll. Further, when the interval between the flanges of the pair of chucks is longer than the length of the core tube, a gap is formed between the core tube and the flange, and the core tube is supported by the pair of chucks in a state shifted in the width direction,
The divided sheet cannot be wound up at a regular position on the core tube. In addition, the core tube is displaced in the width direction during winding, which may cause uneven end faces of the winding roll.

The positioning error of the winding arm as described above can be improved by automatically controlling the moving mechanism using a positioning control device. However, even if it does so, the following problems will arise. That is, in general, a core tube cut to the same length as the width of the divided sheet is used,
The distance between the pair of winding arms is automatically adjusted by the moving mechanism to the cutting width set in the setting section. However, since the length of the core tube has an error within a certain allowable range, when the both ends of the core tube are held by a pair of chucks, the flange portion of the chuck does not contact the length of the core tube with an appropriate pressure. Not exclusively. That is, when the core tube is longer than the regular length, the core tube is pinched and bent by the flange of the chuck. When the core tube is shorter than the regular length, a gap is formed between the flanges of the chucks on both sides and the end surface of the core tube.

When the body of the chuck is slidably and non-rotatably attached to the tip of the spindle,
In order to reduce the play of the body of the chuck, it is necessary to increase the length of the body. However, in such a case, it is necessary to increase the moving amount of the winding arm when attaching and detaching the core tube, and it takes more time than necessary to attach and detach the core tube.
This will reduce the operating rate of the slitter winding machine. Also, in the slitter winding machine, it is desirable that the minimum winding width is small in order to satisfy various winding specifications, but the space occupied by the chuck and the winding arm increases in the width direction of the belt-shaped sheet, and the slitter winding machine There is also a problem that the minimum winding width becomes large.

[0007]

According to the present invention, a pair of chucks engaged with both ends of a core tube for winding a strip-shaped sheet have a flange at a rear side of a body inserted into a hollow portion of the core tube. Are mounted on a pair of winding arms that can be individually moved along a guide surface by a moving mechanism. The pair of winding arms have a pair of spindles concentric with the core tube and facing each other, supporting the spindles via a plurality of rolling bearings, and fixing an inner ring of each rolling bearing to the spindle. Each outer ring of the rolling bearing supporting one of the pair of spindles,
The rolling bearing, which is slidably held in the axial direction of the spindle, biases at least one of the outer races toward the core pipe with a spring, and supports the other of the pair of spindles. At least one outer race is immovably held in the axial direction of the spindle. Then, the pair of chucks were individually fixed to tip portions of the pair of spindles.

With the above-described structure, one of the pair of chucks can be supported so as to be elastically slidable in the axial direction of the spindle with respect to the winding arm and not to rattle. The other can be supported in a fixed position with respect to the winding arm. Then, when the core tube is supported, even if the length of the core tube varies or an error occurs in the positioning of the winding arm by the moving mechanism, one of the chucks moves the spring with respect to the winding arm accordingly. Retreat against the urging force of. For this reason, it is possible to prevent the clamping pressure of the core tube between the pair of chuck flanges from becoming excessive or a gap from being formed between the end surface of the flange and the end surface of the core tube. Further, since the other chuck is supported at a fixed position with respect to the winding arm, the core tube can be accurately supported at a position corresponding to the band-shaped sheet. The above-described rolling bearing is a radial ball bearing or a radial roller bearing, and is a type in which the outer ring and the inner ring are not separated by a load in a thrust direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A winding core tube supporting device of a slitter winding machine according to the present invention is provided on both sides of the core tube slidably mounted on a guide surface extending parallel to the core tube for winding a belt-shaped sheet. A pair of winding arms, a moving mechanism that can move the pair of winding arms along the guide surface, and a flange on the rear side of the body inserted into the hollow portion of the core tube. A pair of chucks mounted on the pair of winding arms, and supporting both ends of the core tube by inserting the body portions of the pair of chucks into the hollow portion from both sides of the core tube. A core tube supporting device for winding of a take-up machine, wherein the pair of winding arms have a pair of spindles concentric with the core tube and facing each other, and each of the spindles is supported via a plurality of rolling bearings. Together with each of the above An inner ring of a rolling bearing is fixed to the spindle, and each outer ring of the rolling bearing that supports one of the pair of spindles is slidably held in an axial direction of the spindle, and at least one of the outer rings Is urged toward the core tube by a spring, and at least one outer ring of the rolling bearing that supports the other of the pair of spindles is immovably held in the axial direction of the spindle. The chucks are individually fixed to the tips of the pair of spindles.

[0010]

1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic side view of a sheet split winder to which the present invention is applied.
FIG. 2 is a schematic plan view. The slitter winder divides the wide band sheet S0 into a plurality of narrow band sheets S by the slitter 1, alternately divides the band sheets S into the winding positions on both sides, and passes through the touch roller 2. And wound up in a roll around the individual core tubes C. During winding, the core tube C is supported by the winding core tube support device 3 in parallel with the width direction of the belt-shaped sheet S, and the touch roller 2 contacts the winding roll R on the core tube C. Then, as the winding proceeds and the radius of the winding roll R increases, the core tube C moves away from the touch roller 2.

[0011] As shown in FIG.
Is a pair of winding arms 5 and 6, which are slidably mounted on the guide surface 4 extending parallel to the width direction of the belt-shaped sheet S and are disposed on both sides of the core tube C, and winding arms 5 and 6, respectively. It comprises a moving mechanism 7 that can be moved to the required position by moving along the guide surface 4, and a pair of chucks 8, 9 mounted on the pair of winding arms 5, 6. Each of the chucks 8 and 9 includes body portions 8a and 9a inserted into the hollow portion of the core tube C, and has flanges 8b and 9b on the rear side of the body portions. On the left winding arm 5,
A motor 10 for rotating the chuck 8 during winding is mounted, and a pulley 11 fixed to an output shaft of the motor 10 has a belt 12 for transmitting the rotation of the motor 9 to the chuck 7.
Is hung.

In this embodiment, the moving mechanism 7 includes the screw rod 1.
3, a motor 14 capable of driving the screw rod 13 forward and reverse, and a motor 14 provided for each of the winding arms 5 and 6 for appropriately engaging and disengaging the winding arms 5 and 6 with the screw rod 13. This is a known device including an engagement / disengagement mechanism 16.

In this embodiment, the guide surface 4 is formed on a base 16 as shown in FIG. 1. The base 16 is used to separate the core tube C from the touch roller 2 during winding. Guideway 4
Can be slid in the direction perpendicular to the longitudinal direction, or can be rotated about an axis parallel to the longitudinal direction of the guide surface 4. As shown in FIG. 2, the guide surface 4 is common to all the winding arms 5 and 6 at one winding position, and the screw rod 13 is also common to all the winding arms 5 and 6 at one winding position. It is.

As shown in FIG. 4, a pair of winding arms 5,
6 has a pair of spindles 17 and 18 concentrically facing the core tube C and facing each other. Chucks 8 and 9 are fixed to the distal ends of the pair of spindles 17 and 18, respectively. The pair of spindles 17 and 18 are supported by two rolling bearings 19 and 20, respectively. Rolling bearing 19, sleeve 21, collar 22, and rolling bearing 2 are arranged on the outer periphery of the right spindle 18 in order from the rear end.
0, a collar 23, and a chrysanthemum washer 24 are fitted, and they are fastened by a lock nut 25 attached to a threaded portion at the rear end of the spindle 18 and a shoulder 18a provided near the tip of the spindle 18. Also left spindle 1
7, rolling bearings 19,
Pulley 26, collar 22, rolling bearing 20, collar 2
3 and a chrysanthemum washer 24 are fitted, and they are lock nuts 25 attached to the threaded portion at the rear end of the spindle 17.
And a shoulder 17a provided near the tip of the spindle. Therefore, the inner rings 19a and 20a of the rolling bearings 19 and 20 are connected to the spindle 1
7 and 18 are fixed. A key 27 is attached between the pulley 26 and the spindle 17.
Has a belt 12 shown in FIG.

The pair of winding arms 5 and 6 have housing members 30 and 31 fixed to the main body member 5a with bolts 28 and 29, respectively.
One, ie, the right spindle 1 in FIG.
8, each outer ring 19b of the rolling bearings 19, 20;
Reference numeral 20b is fitted to bearing seat surfaces formed on the housing members 30 and 31 so as to be slidable in the axial direction of the spindle 18. And the outer ring 2 of the rear rolling bearing 20
Ob is urged toward the tip of the spindle 18 by a plurality of disc springs 32. Before attaching the chrysant washer 24 and the lock nut 25 to the spindle 18, the disc spring 32
Of the take-up arm 6
Then, the flanged cylindrical body 33 is fixed to the housing member 30 using a countersunk screw (not shown), and the front end face of the flanged cylindrical body 33 presses the disk spring 32. The disc spring 32 may be replaced with another known spring such as a compression coil spring as needed.

The outer races 19b and 20b of the rolling bearings 19 and 20 supporting the left spindle 17 are fitted to bearing seat surfaces of housing members 30 and 31, and the outer race 20b on the rear end side is located on the front side of the housing member 31. The spindle 17 is prevented from moving in the axial direction by being sandwiched between a shoulder 31a formed in the housing member 31 and a cylindrical body 34 with a flange fixed to the rear side of the housing member 31.

In order that the chucks 8 and 9 can be replaced in accordance with the inner diameter of the core tube C, the tips of the pair of spindles 17 and 18 have tapered portions 17b and 1b.
8b are formed, and tapered holes formed concentrically with the chucks 8 and 9 are fitted into the tapered portions 17b and 18b, and the chucks 8 and 9 are tightened with bolts 35 in the axial direction of the spindles 17 and 18.

A key 36 is provided between the spindle 17 on the left side and the body 8a of the chuck 8, and the body 8a of the chuck 8 is for preventing the core tube C from idling. A core tube fixing means 37 described in the embodiment of FIG. 7 and FIG. 8 of No. 159653 is provided. The chuck 8 on the left side may employ another known core fixing means as long as the core tube C can be fixed to the body 8a.

The amount of movement of the right spindle 18 in the axial direction with respect to the winding arm 6 is determined in accordance with the positioning error of the winding arm, the error in the length of the core tube, and the like. When the core tube C is accurately positioned at the required winding width and the core tube C of the correct length is supported, the right spindle 18
Is moved by about half of the movement amount. The urging force of the disc spring 32 is determined according to the rigidity of the core tube C and the winding arms 5 and 6. When the core tube C is not supported, the outer race 20b of the rear rolling bearing 20 in the right winding arm 6 is pushed in the distal direction by the urging force of the disc spring 32 and hits the shoulder 31a of the housing member 31 and stops. doing. Accordingly, in this state, when the pair of winding arms 5 and 6 are moved by the moving mechanism 7 so that the mutual interval corresponds to a required winding width, the pair of chucks 8 and 9 face the flanges 8b and 9b. The space between the surfaces is slightly shorter than the length of the core tube C.

In order to support the core tube C, in FIG. 3, the left take-up arm 5 is set at a predetermined position by the moving mechanism 7, and the right take-up arm 6 is moved to the center between the pair of chucks 8, 9 at the center. After attaching to the position slightly longer than the length of the tube C,
The core tube C is temporarily supported between the pair of chucks 8 and 9 and concentrically by a known core tube temporary support means (not shown), and the right winding arm 6 is moved by the moving mechanism 7 so that the distance between the two is maintained. Is attached at a position corresponding to the required winding width. Thereby, the trunk portions 8a, 9a of the pair of chucks 8, 9 are inserted into the hollow portion from both ends of the core tube C, and the flanges 8b, 9 of the chucks are provided.
b hits the end face of the core tube C, and the core tube C is
b, 9b. The pinching force is mainly caused by the urging force of the disc spring 32 shown in FIG. 4 and the outer rings 19 of the rolling bearings 19 and 20 supporting the spindle 18.
b, 20b and the bearing seat surface, the right chuck 9 becomes larger than the spindle 1
Along with 8, the slide retreats against the urging force of the disc spring 32, and the clamping force decreases accordingly. In this state, both ends of the core tube C are held by the pair of chucks 8 and 9.

To remove the core tube C from the chucks 8, 9, the right winding arm 6 is moved from the core tube C by the moving mechanism 7 until the distance between the tips of the chucks 8, 9 is longer than the length of the core tube C. Retreat.

According to the present invention, if necessary, the above-mentioned moving mechanism may be replaced with a right-feed screw rod, such as disclosed in Japanese Patent Application Laid-Open No. 64-48752. A right feed engagement mechanism for engaging and disengaging the winding arm with the winding arm, a left feeding screw rod, and a left feeding engagement mechanism for engaging and disengaging the left feeding screw rod and the winding arm; A common fixed screw rod, a female screw body for each winding arm screwed to the screw rod, and a motor for each winding arm for driving the female screw body to rotate in both forward and reverse directions. Other known moving mechanisms, such as those using a linear motor or those using a linear motor, can be employed. Further, the chuck is not limited to the above-described one, and a chuck that opens the claws by air pressure to fix the core tube to the body can be used. Also, in the above-described embodiment, during winding, one chuck rotates following the other chuck that is rotationally driven.
In order to increase the rotational driving force of the core tube, both the pair of winding arms are provided with a motor and a transmission device as shown on the left side of FIGS. 3 and 4, and the rotation of each motor is transmitted to the pair of chucks. You may do so. Further, the sheet dividing and winding machine may be of a type in which the divided band-shaped sheet is distributed vertically and wound, or a device having a guide surface for each of a pair of winding arms.

[0023]

According to the present invention, when the core tube is supported,
Even if there is a positioning error of the take-up arm, or if the core tube is slightly shorter or longer than the regular length due to the cutting length error, one of the chucks will respond to the biasing force of the spring in accordance with those errors. Since it is possible to retreat in opposition, it is prevented that the clamping pressure of the core tube by the pair of chucks becomes excessive and that a gap is formed between the end surface of the flange of the chuck and the end surface of the core tube. Since one of the chucks is supported at a fixed position with respect to the winding arm, the core tube can be accurately supported at a position corresponding to the band-shaped sheet. Also,
The outer ring of the rolling bearing that supports the spindle slides on the bearing seat surface of the winding arm, and the chuck is fixed to the spindle, so that rattling can be reduced even if the length of the chuck is shortened. . Therefore, the split sheet is wound around the core tube in a state shifted in the width direction,
The core tube can be prevented from being bent by being strongly pressed by the chucks on both sides, and a core tube supporting device having a very simple structure and excellent load resistance can be obtained. Further, it becomes possible to provide a slitter winding machine capable of winding a divided sheet having various widths from a narrow width to a wide width at high speed with good quality.

[Brief description of the drawings]

FIG. 1 is a schematic side view according to an example of a slitter winding machine to which the present invention is applied.

FIG. 2 is a schematic plan view of the slitter winding machine shown in FIG.

FIG. 3 is a front view of a winding core tube support device of the slitter winding machine according to one embodiment of the present invention.

FIG. 4 is a sectional view taken along the line AA in FIG. 3;

[Explanation of symbols]

S strip-shaped sheet C core tube 1 slitter 3 winding core tube support device 4 guide surface 5 winding arm 6 winding arm 7 moving mechanism 8 chuck 8a trunk 8b flange 9 chuck 9a trunk 9b flange 16 base 17 spindle 18 Spindle 19 Rolling bearing 19a Inner ring 19b Outer ring 20 Rolling bearing 20a Inner ring 20b Outer ring 30 Housing member 31 Housing member 32 Spring

Claims (1)

[Claims] 1. A pair of winding arms, which are slidably mounted on a guide surface extending parallel to a core tube on which a belt-like sheet is wound, and which are disposed on both sides of the core tube, and the pair of winding arms, A moving mechanism capable of moving along the guide surface, and a pair of chucks mounted on the pair of winding arms, having a flange on a rear side of a body inserted into the hollow portion of the core tube; A core tube supporting device for a slitter winding machine, wherein both ends of a pair of chucks are inserted into hollow portions of both sides of the core tube from both sides of the core tube to support the core tube. The arm has a pair of spindles concentric with the core tube and facing each other, supports the spindles via a plurality of rolling bearings, fixes an inner ring of each rolling bearing to the spindle, and fixes the pair of spinning shafts. Each of the outer rings of the rolling bearing supporting one of the dollars is slidably held in the axial direction of the spindle, and at least one of the outer rings is biased toward the core tube by a spring. At least one outer ring of the rolling bearing that supports the other of the pair of spindles is immovably held in the axial direction of the spindle, and the pair of chucks are individually fixed to tips of the pair of spindles. A core tube support device for winding a slitter winding machine.