JPH1087133A - Web rewind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a web from being rewound toward a feed roller while being slacked, partly folded or meandering in a web rewind. SOLUTION: A rewind for a web W comprises a support means for rotatably supporting a coiled web C and a feed roller 12 along which a web W rewound from the coiled web C supported on the support means is fed. A web-aligning guide 34 is disposed at an upstream position of the web-moving path with respect to the feed roller 12. The web-aligning guide 34 comprises a pair of parallel side guide plates 35 on both sides of the web-moving path, surface guide rods arranged between both side guide plates 35, and underside guide rods arranged between both side guide plates 35 corresponding to the surface guide rods 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web rewinding apparatus, and more particularly, to a method of forming a web into a tube by using a web as a packaging material, and filling the tube with a content such as a flowable food. The present invention relates to a device for unwinding a web from a coiled web in a packaging machine which divides a filling tube into lengths corresponding to one container and finally makes the tube into a rectangular parallelepiped container.

[0002]

2. Description of the Related Art Conventionally, as a web rewinding device of this kind, a supporting means for rotatably supporting a coiled web and a feed roller on which a web unwound from the coiled web supported by the supporting means is wound. What is provided is known.

[0003]

However, in a conventional web rewinding device of a packaging machine, when the feed speed of the web is changed, the web becomes slack due to the rotational inertia of the coiled web, and the web is loosened. I have trouble driving.

Further, when the web is rewound to near the end, the old coiled web is replaced with the new coiled web without stopping the packaging machine, and the starting end of the succeeding web is connected to the end of the preceding web. There is a need to. Usually, such work is performed when the remaining amount of the leading web in the old coiled web reaches a predetermined amount, and all the webs are manually drawn out from the old coiled web, and the starting end of the succeeding web is placed at the end of the leading web. After connecting
This is done by supporting a new coiled web on the support means. However, when all the webs were unreeled from the old coiled web, the webs were broken by their own weight at the creases (fold lines provided on the webs in advance to facilitate the formation of containers from the webs in a later process). It may be bent and folded, and partially overlap when passing through the feed roller, which hinders the operation of the packaging machine.

[0005] Furthermore, the web that has been manually fed is displaced in a direction orthogonal to the moving direction, and the web may meander, causing the following problem. That is, a dancer roller, a guide roller, and the like may be arranged downstream of the feed roller, and both ends of these rollers are usually provided with outward flanges. Then, when the web is meandering, the web is caught by the outward flange of the dancer roller or the guide roller and is broken, so that there is a problem that the operation of the packaging machine becomes impossible.

An object of the present invention is to solve the above-mentioned problems and to provide a web rewinding device capable of preventing a web from reaching a feed roller while being slackened, folded, or meandering.

[0007]

According to a first aspect of the present invention, there is provided a web rewinding device comprising: a supporting means for rotatably supporting a coiled web; and a web unwound from the coiled web supported by the supporting means. In a web rewinding device having a feed roller to be wound around, a web correcting means is disposed in a portion of the web moving path upstream of the feed roller.

According to the web rewinding device of the first aspect of the present invention, the web rewinded from the coiled web is corrected for slack, folding or meandering of the web by the web correcting means before reaching the feed roller. You.

In the above-mentioned web rewinding device, the web correcting means may regulate the state of the web from both front and back sides and / or both side edges thereof. In this case, the web that has been rewound from the coiled web is regulated by the web correcting means from both front and back sides before reaching the feed roller, and as a result, the slack or folding of the web is corrected. Therefore,
When the web passes through the feed roller, it is prevented that the web is partially overlapped, and the operation of the packaging machine is performed without any trouble.

Before the web reaches the feed roller, the web is regulated from both side edges by web correcting means,
As a result, the meandering of the web is corrected. Therefore, the web is prevented from being hooked on the outward flanges such as the dancer roller and the guide roller disposed downstream of the feed roller, and as a result, the web is prevented from being broken.

In the above-described web rewinding device, the web correcting means changes the state of the web by the front-side guide rod and the rear-side guide rod corresponding to and parallel to the front-side guide rod. In some cases, it is regulated from both sides.

In the above-described web rewinding device, the web correcting means regulates the state of the web from both side edges by a pair of parallel side guide plates arranged on both sides of the web moving path. Sometimes.

In the above-described web rewinding device, the web correcting means includes a pair of side guide plates parallel to each other disposed on both sides of the web moving path, a front side guide rod provided between the both side guide plates, A front side guide rod and a back side guide rod provided between both side guide plates so as to correspond to the front side guide rod, and the front side guide rod and the back side guide rod regulate the state of the web from both front and back sides. At the same time, the state of the web may be regulated from both side edges by a pair of side guide plates.

In the web rewinding device provided with the front side guide rod and the back side guide rod, the distance between the two guide rods is 3 to 5 mm more than the thickness of the web.
May be larger. In this case, the slack or fold of the web is reliably corrected, and the resistance to the web passing through the web correcting means can be minimized.

[0015] In the web rewinding device provided with the front side guide rod and the back side guide rod, a plurality of pairs of the front side guide rod and the back side guide rod are provided at intervals in the moving direction of the web. May have been In this case, the slack or fold of the web is more reliably corrected.

In the web rewinding device provided with the front side guide rod and the back side guide rod, both guide rods may be rotatable around their respective axes. In this case, the resistance to the web passing through the correcting means can be further reduced.

In the web rewinding device provided with the pair of side guide plates, the interval between the side guide plates may be 2 to 4 mm larger than the width of the web. In this case, the meandering of the web can be reliably corrected, and the web can be moved with a minimum sliding resistance.

In the above web rewinding device, the web correcting means may be swingable about a horizontal axis orthogonal to the web moving path. in this case,
It is possible to cope with a change in the diameter of the coiled web due to the unwinding, and a coiled web of different diameters of different sizes.

In the above-described web rewinding device, a guide roller may be provided at a portion downstream of the feed roller in the web moving path, and a dancer roller may be provided between the feed roller and the guide roller. In this case, substantially uniform tension can be applied to the web passing through the feed roller, so that the web is less likely to be slackened, and even if the web is slackened, it can be quickly removed by the web correcting means.

In the web rewinding device having the guide roller and the dancer roller, a plurality of pairs of the guide roller and the dancer roller may be provided. In this case, a more uniform tension can be applied to the web passing through the feed roller.

In a web rewinding device provided with the guide roller and the dancer roller, the rotation speed of the feed roller may be adjusted by detecting the upper limit position and the lower limit position of the dancer roller, respectively.
In this case, the fluctuation of the tension acting on the web passing through the feed roller can be reduced. Therefore, the web is less likely to be slackened, meandered, and the like.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. In the following description,
The right side of FIG. 2 is referred to as front, the opposite side is referred to as rear, and the left and right are referred to forward.

FIGS. 1 and 2 show the overall structure of a web rewinding device according to the present invention, and FIGS. 3 and 4 show the essential parts thereof. FIG. 5 shows the entire configuration in a state where the diameter of the coiled web is reduced due to the progress of rewinding.
Shows the entire configuration in a state where the old coiled web is replaced.

In FIGS. 1 and 2, the web rewinding device is housed in a housing (1) opened rearward, and a pair of parallel left and right support plates (2) for supporting a coiled web (C). ). The front edge of each support plate (2) is inclined rearward downward from a portion near the upper end. The upper and lower pairs of wheels (3) and (4) are mounted on the upper end of the outer surface in the left-right direction of each support plate (2) at an interval in the front-back direction. The upper and lower pairs of wheels (3) and (4) are
A rail (6) extending in the front-rear direction fixed to the inner surfaces of the left and right side walls (5) of (1) is sandwiched and rolls along the rail, so that both support plates (2) are movable in the front-rear direction. Has become.

A rear protruding portion (7) is provided at the lower end of each of the support plates (2), and a notch (8) for inserting a rotary shaft is formed at a position on the upper edge corresponding to the front-rear direction. . And the core of the coiled web (C) (9)
The left and right ends of the rotary shaft (10) are
It is fitted in the notch (8) in (2).

Below both support plates (2), coiled webs
A basket (11) is arranged so as not to hinder the rotation of (C), and is hung on both support plates (2).

A feed roller (12) extending in the left-right direction is disposed slightly below the upper end of the support plate (2) and slightly behind the front end between the support plates (2). (2) A first rotatable first guide roller (20) extending in the left-right direction at a portion in front of the feed roller (12) between the two.
Is disposed so as to be at substantially the same height level as the feed roller (12), and at a position diagonally above and in front of the first guide roller (20) between the two support plates (2), a rotatable rotatably extending in the left-right direction. A second guide roller (13) is provided. Also, at a portion between the feed roller (12) and the first guide roller (20) and at a position almost directly below the second guide roller (13), the respective portions come to a height position lower than the feed roller (12). , First and second dancer rollers rotatable extending in the left-right direction
(30) and (14) are arranged. Both dancer rollers 30 and 14 are at substantially the same height level as one another. Coiled web
The web (W) rewound from (C) is fed by the feed roller (12).
Wrapped around the first dancer roller (30) from above and turned upward, and wrapped around the first guide roller (20) from above. Can be turned downwards,
It is wound around the second dancer roller (14) from below and changes its direction upward, and is further wound around the second guide roller (13) from above and changes its direction backward.

The feed roller (12) is rotatably supported via bearings (not shown) around a horizontal shaft (15) extending in the left-right direction and having both left and right ends fixed to the left and right support plates (2). ing. The feed roller (12) is driven by a suitable driving means (1
According to 6), it can be rotated in two levels of high and low. If the feed amount of the web (W) per unit time is called a standard feed amount, the feed roller (12)
The feed amount of the web (W) by the feed roller (12) when the roller is driven by the driving means (16) to rotate at a high speed is equal to or larger than the standard feed amount, and the feed when the web is driven to rotate at a low speed. The rotational speed of the feed roller (12) is set in two levels, such that the feed amount of the web (W) by the roller (12) is less than the standard feed amount.

A web is provided slightly below the feed roller (12).
A pressing roller (17) extending in the left-right direction for pressing the (W) against the feed roller (12) is provided. Presser roller (17)
Is a horizontal axis fixed between the tips of a pair of left and right arms (18).
It is rotatably mounted around (19). Both arms (1
8) are fixed to a horizontal rotating shaft (21) extending at the base end thereof in the left-right direction and both ends are rotatably supported by left and right support plates (2). It can swing about (21). The left end of the horizontal rotation shaft (21) protrudes leftward from the left support plate (2), and a fluid pressure cylinder (22) is connected thereto through an arm (23), and the fluid pressure cylinder ( The pressing roller (17) presses the web (W) toward the feed roller (12) via the arm (23), the horizontal rotating shaft (21), and the arm (18) by means of the arm (23).

The two guide rollers (20) and (13) have bearings (not shown) around horizontal shafts (40) and (24) extending in the left-right direction and fixed at right and left ends to left and right support plates (2). It is rotatably supported via. Also, both guide rollers (20) (13)
Are provided with outward flanges (41) and (25), respectively.

The first dancer roller (30) includes a pair of left and right rocking plates (27) extending at the front end, each of which has a base end pivotally supported by the lower end of the outer surface of the left and right support plate (2). The second dancer roller (14) is disposed between the portions closer to the front end, and the second dancer roller (14) is further disposed between the front end portions of the swing plate (27) than the first dancer roller (30). The base ends of the rocking plates (27) are rotatably supported by the left and right support plates (2), respectively, and are fixed around a horizontal rotating shaft (26) extending outward and extending in the left-right direction. Installed. The two dancer rollers (30) and (14) are respectively supported via bearings (not shown) around horizontal shafts (42) and (28) extending in the left-right direction and held between the end portions of the two rocking plates (27). It is rotatably supported. Outward flanges (43) and (29) are provided at both ends of both dancer rollers (30) and (14), respectively.

The swing plate (27) on the right horizontal rotating shaft (26)
A base end of a detector operation plate (31) extending obliquely upward and forward in the radial direction of the horizontal rotation shaft (26) is fixed to a portion protruding further rightward. The right and left dancer rollers (30) (1) are located at a position radially outward of the horizontal rotation shaft (26) from the tip of the detector operating plate (31) on the outer surface of the support plate (2).
Upper limit and lower limit detectors (32) and (33) for detecting the upper limit position and the lower limit position of 4) and outputting the upper limit level signal and the lower limit level signal, respectively, are attached.
The two level detectors (32) and (33) are turned on when the detector operation plate (31) does not exist at a portion facing the detection end facing the horizontal rotation axis (26), respectively. Turns off when (31) is present.

Feed roller (12) in web movement path
A web correction guide (34) (web correction means) is arranged in a portion on the upstream side of the web. Web Correction Guide (3
4), as shown in FIGS. 3 and 4, a pair of left and right side guide plates (35) arranged on both left and right sides of the web moving path, and both side guide plates spaced apart in the web moving direction. A pair of mutually parallel front surface guide rods (36) provided between the plates (35), and both side guide plates (35) so as to correspond to the both surface side guide rods (36).
A pair of mutually parallel back surface side guide rods provided between them
(37). Front and back guide rods
(36) and (37) are located on a horizontal line orthogonal to the web movement path. The guide rods (36) and (37) are cylindrical, and are rotatably fitted around horizontal shafts (44) and (45) fixed between the side guide plates (35). When the distance between the side guide plates (35) is large, the two guide rods (36) and (37) can rotatably fit two or more cylindrical bodies around the horizontal shafts (44) and (45). It may be formed by covering. Both side guide plates
The spacing between the (35) is 2 to 4 mm larger than the width of the web (W), and the front side guide rod (36) and the back side guide rod
The space between the corresponding parts in (37) is 3 to 5 mm larger than the thickness of the web (W). In addition, Web
The width and thickness of (W) vary depending on the type of contents to be filled by the packaging machine and the size of the container to be finally obtained, but usually the width is about 150 to 350 mm and the thickness is 0.3 to 1. It is about 0 mm. The ends of both side guide plates (35) on the feed roller (12) side are a pair of left and right arms rotatably mounted on a horizontal shaft (19) whose base end supports a pressing roller (17). It is fixed to the tip of (38).

In the web rewinding device as described above, the web unwound from the coiled web (C)
(W) passes between the front and back side guide rods (36) and (37) of the web correction guide (34) and between both side guide plates (35) to reach the feed roller (12), In addition, both dancer rollers (30) (14) and both guide rollers (20) (1
After 3), it is sent to the next section of the packaging machine. At this time, the web (W) is in contact with at least the front guide rod (36) on the horizontal shaft (19) side of the front and rear guide rods (36) and (37) of the web correction guide (34).

Even if the feed speed of the web (W) changes and the web (W) becomes slack due to the rotational inertia of the coiled web (C), the web (W) can be replaced by the web correction guide (34). Since the front and rear guide rods (36) and (37) sandwich the front and rear surfaces, the slack generated on the web (W) is removed before reaching the feed roller (12). That is, the web correction guide (34) swings slightly downward about the horizontal axis (19) by its own weight, and the web (W)
Is sandwiched from the front and back sides by the front and back guide rods (36) and (37) of the web correction guide (34), and by contacting the front guide rod (36) on the horizontal shaft (19) side, The slack is removed. Also, web (W)
Is prevented from partially overlapping when passing around the feed roller (12). Moreover, even if the web (W) has meandering, it is sandwiched from both side edges by both side guide plates (35) of the web correction guide (34), so that the meander also reaches the feed roller (12). Before being corrected. Therefore, dancer rollers (30) (14) and guide rollers (20) (13)
The web (W) is prevented from catching on the outward flanges (29) and (25) of the web, and as a result, the web (W) is prevented from being broken.

As shown in FIG. 5, as the rewinding of the web (W) progresses and the diameter of the coiled web (C) decreases, the web from the coiled web (C) to the feed roller (12) is reduced. The moving path changes, and the web correction guide (34) swings upward around the horizontal axis (19) due to the tension of the web (W). Even if the web (W) is loosened in such a state, the slack generated on the web (W) is removed and the meandering is corrected in the same manner as described above. Even if the diameter of the coiled web is different, the slack generated on the web (W) is not affected by the web correction guide (34) swinging due to the tension of the web (W) or its own weight. It is removed and meandering is corrected.

Assuming that the feed roller (12) is rotated at a high speed by the driving means (16), the feed amount of the web (W) by the feed roller (12) is equal to or larger than the standard feed amount. The dancer rollers (30) (14) descend by their own weight. As a result, the swing plate (27) swings downward according to the rotation of the horizontal rotating shaft (26), and at the same time, the detector operating plate (3
1) swings in the same direction. Eventually, detector operation plate (31)
Reaches the position deviated from the detection end of the lower-level detector (33), the lower-level detector (33) detects this, and the detector (3)
The lower limit level signal is output from 3), and the feed roller (12) is switched to low speed rotation by the driving means (16) based on the output signal. Then, since the feed amount of the web (W) by the feed roller (12) is less than the standard feed amount, both dancer rollers (30) and (14) rise by the tension of the web (W). As a result, the swing plate (27) and the detector operation plate (31) swing in the direction opposite to the above direction,
The detector operating plate (31) reaches a position off the detection end of the upper limit level detector (32). Then, this is connected to the upper level detector (3
2), the detector (32) outputs an upper limit level signal, and based on the output signal, the driving means (16) switches the feed roller (12) to high-speed rotation. As a result, the feed amount of the web (W) by the feed roller (12) becomes larger than the standard feed amount again, so that both dancer rollers (30) and (14) descend by their own weight. In this way, both dancer rollers (30) and (14) repeatedly move up and down within a range where the lower and upper level detectors (33) and (32) detect the detector operation plate (31). The tension due to the weight of the dancer rollers (30) (14) and the swing plate (27) always acts. Therefore, a substantially uniform tension can be applied to the web (W) passing through the feed roller (12), and the feed roller (12)
The web (W) is less likely to slack on the upstream side of the web, and even if slack occurs, it can be quickly removed by the web correction guide (34).

The replacement of the coiled web (C) is performed as follows. If the remaining amount of the web (W) wound on the coiled web (C) is such that it can be rewound in 1 to 2 minutes, as shown in FIG. From coiled web (C) to all webs
(W) is drawn out into the basket (11), the support plate (2) is moved backward, and the rear of the basket (11) is moved to the housing (1).
From the rear. Then, before the web (W) in the unwound basket (11) runs out, the preceding web
After connecting the starting end of the succeeding web (W) to the end of (W), the core (9) of the old coiled web (C) is removed, and the core (9) of the new coiled web (C) is removed. ) Rotary axis
The new coiled web (C) is supported by the support plate (2) by fitting (10) into the notch (8) of the support plate (2).
Thus, the coiled web (C) is replaced. By the way, when all the webs (W) are unreeled from the old coiled web (C), they are bent at the crease due to the weight of the web (W), or are unreeled and consumed in order from the bottom. The web (W) is bent at the crease due to the weight resistance of the web (W) above it, and the folding due to these bends is performed in the same way as removing the slack described above. It is removed by the guide (34).

In the above embodiment, the front and rear guide rods (36, 37) are rotatable about their axes, but may be fixed. Further, in the above embodiment, the web correction guide (34) is composed of a pair of left and right side guide plates (35) parallel to each other, and both side guide plates (35) spaced apart in the web moving direction.
A pair of mutually parallel surface-side guide rods provided therebetween
(36) and a pair of parallel back guide rods (37) provided between both side guide plates (35) so as to correspond to both front guide rods (36). Instead, the front side guide plate and the back side guide plate are fixed between the two side guide plates at the same interval as the distance between the front side guide rod (36) and the rear side guide rod (37). Is also good. Further, a flat rectangular tubular body may be used as the web correction guide. In this case, the interval between the long sides in the cross section of the rectangular cylindrical body is set to be the same as the interval between the front-side guide rod (36) and the rear-side guide rod (37), and the interval between the short sides is also set. The distance between both side guide plates should be the same as the distance between them.

[0040]

According to the web rewinding device of the first aspect of the present invention, as described above, before reaching the feed roller, the slack, folding, and meandering of the web are removed by the web correcting means. Therefore, it is possible to prevent the operation of the packaging machine from being hindered due to the presence of the slack or the fold of the web. Further, it is possible to prevent the operation of the packaging machine from being disabled due to the meandering web.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing the entire configuration of a web rewinding device according to the present invention.

FIG. 2 is a partially cutaway side view.

FIG. 3 is an enlarged rear view showing a portion around a web correction guide of the web rewinding device.

FIG. 4 is a partially enlarged view of FIG. 2;

FIG. 5 is a partially cutaway side view showing the entire configuration in a state where the unwinding proceeds and the diameter of the coiled web is reduced.

FIG. 6 is a partially cutaway side view showing an entire configuration of a state in which an old coiled web is replaced.

[Explanation of symbols]

(12) Feed roller (34) Web correction guide (Web correction means) (C) Coiled web (W) Web

Claims (13)

[Claims] An apparatus for rewinding a web, comprising: support means for rotatably supporting a coiled web; and a feed roller on which a web unwound from the coiled web supported by the support means is wound. A web rewinding device in which web correcting means is disposed at a portion of the web moving path upstream of the feed roller. 2. The web rewinding device according to claim 1, wherein the web correcting means restricts a state of the web from both front and back sides and / or both side edges thereof. 3. The web correcting means regulates the state of the web from both front and back sides by a front side guide rod and a rear side guide rod corresponding to and parallel to the front side guide rod. 2. The web rewinding device according to claim 1, wherein 4. The web correcting device according to claim 1, wherein the web correcting means restricts the state of the web from both side edges by a pair of side guide plates parallel to each other disposed on both sides of the web moving path. Web rewinding device. 5. A web correction means comprising: a pair of side guide plates parallel to each other disposed on both sides of a web moving path; a front side guide rod provided between both side guide plates; and a front side guide rod. And a back side guide rod provided between both side guide plates to control the state of the web from both front and back sides by the front side guide rod and the back side guide rod. 2. The web rewinding device according to claim 1, wherein the side guide plate regulates the state of the web from both side edges thereof. 6. The web rewinding device according to claim 3, wherein a distance between the front side guide rod and the rear side guide rod is 3 to 5 mm larger than a thickness of the web. 7. The web rewinding device according to claim 3, wherein a plurality of pairs of front surface side guide rods and rear surface side guide rods are provided at intervals in the moving direction of the web. 8. The web rewinding device according to claim 3, wherein the front side guide rod and the rear side guide rod are each rotatable about an axis. 9. The web rewinding device according to claim 4, wherein a distance between both side guide plates is larger by 2 to 4 mm than a width of the web. 10. The web rewinding device according to claim 1, wherein the web correcting means is swingable about a horizontal axis orthogonal to the web moving path. 11. A web roller according to claim 1, wherein a guide roller is disposed at a portion downstream of the feed roller in the web moving path, and a dancer roller is disposed between the feed roller and the guide roller. 4. The web rewinding device according to claim 1. 12. The web rewinding device according to claim 11, wherein a plurality of pairs of guide rollers and dancer rollers are provided. 13. The web rewinding device according to claim 11, wherein an upper limit position and a lower limit position of the dancer roller are respectively detected to adjust the rotation speed of the feed roller.