JPS594558A - Web guide using v-shaped supporter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that uses tilt rollers to guide a running web material. In particular, the present invention relates to a novel means for guiding the inclined rollers of a web guide in an arcuate path in the plane of the web from a position perpendicular to the web path to inclined positions to the left and right of it. Thereby, the center point of the tilting roller pivoting movement (hereinafter referred to as pivot point) can be positioned in an optimal position, ie on the line defined by the inlet edge of the inlet tilting roller. Here, the term "pivot" refers to the rotation of the roller around the pivot point from the central position to the left and right diagonal positions within the web surface.

Many common types of equipment for guiding web material in transit, such as a paper web passing through a printing machine, use inclined rollers normally arranged perpendicular to the direction of web travel and in frictional contact with the web. are using. In some such web guides, the ends of the rollers are supported to counteract the lateral displacement of the web as it deviates from its designed path and to direct and correct it back to its proper path line. The means for doing so is rotated to either the left or right in an arcuate path in a plane parallel to the web surface, thereby pivoting the roller.

In web guiding technology, the greatest control over the row MK of the running web is obtained when the pivot point around which the inclined roller pivots is in the middle of the line defined by the entry edge of the entry inclined roller. well known. At least one basis for this principle is the fact that when the pivot point is located at this ideal location, the inlet ramp roller exerts a torsional action on the moving web. This torsional action is capable of producing the desired change in the direction of web travel to a greater extent than would be created by the sliding action of the diagonal rollers if the pivot point were located downstream of this ideal pivot point. Are known.

Various web guides have been developed. These may be such that the center of the arcuate path at each end of the guide roller is located a small distance forward of the inlet bevel roller, or located behind the inlet bevel roller, or adjacent to the inlet edge of the inlet bevel roller. In the case of web guides of the last-mentioned type f0 incorporating such inclined rollers located thereon, a large number of moving parts are generally required to allow pivoting of the rollers.

Moreover, numerous types of bearing carriages have been used in all citrus web guidance. Thus, the main difference that distinguishes web devices is, firstly, where the pivot center is located which defines the pivot arc and hence the arcuate path of the roller, and secondly, where the pivot point is located that defines the arcuate path of the roller. The difference lies in the structure of the mechanical means used to do so.

U.S. Pat. No. 2,797,091 discloses a pivot rjh that includes an upright plate mounting an inlet ramp roller and an exit ramp roller.

A web displacement device is disclosed that includes a flexible carriage. The plate supporting the inclined rollers is pivotally mounted at its midpoint to a vertically disposed spindle. The bearing means allowing pivoting of the tilting rollers consists of the above-mentioned spindle rotating in a cylindrical hole formed in the upright plate. The pivoting arc of the angled rollers has a central pivot between the inlet and outlet angled rollers.

U.S. Pat. No. 5,390,823 discloses a web guiding device in which an inclined roller carriage is pivotally mounted on a fixed frame by guide rods and follower means. The guide rod attached to the fixed frame has an arcuate configuration and a substantially rectangular cross section.

The follower means consists of a plurality of plastic laminates in which a generally arcuate groove is formed for slidably receiving the guide rod. This patent states that in order to reduce wear during guideway-following means abutment, the guide rod must be formed in an arc with a large radius of curvature. A preferred radius of curvature is in the range from 2 to 8 times the width of the material web being conveyed and at least twice the length of the inclined roller. The center of the pivoting arc of the ramp roller is located a considerable distance in front of the inlet edge of the inlet ramp roller.

U.S. Pat. No. 3.4σ4706 discloses a web sensing and control device that also uses an arcuate guide rod and a sliding follower as a bearing carriage to allow pivoting of an inclined roller. In this device as well, it is disclosed that the center of the pivot arc of the inclined roller is located at a position far in front of the inlet edge of the inlet inclined roller.

U.S. Pat. No. 3,490,674 also discloses the use of a bearing carriage that includes an arcuate guide rod and a slidable follower and is pivoted well forward of the inlet edge of the inlet ramp roller.

U.S. Pat. No. 5,583,615 discloses a web guiding device in which an inclined roller is attached to a pair of first linear swinging arms,
In this case, the first arm is rotatably supported by a second pair of curved swinging arms, and the second pair of arms is then rotatably mounted on a fixed support. There is no disclosure regarding the location of the cardinal points.

U.S. Pat. No. 5,581,965 discloses a method for guiding web shedding during travel and also discloses many embodiments of web guiding devices. As in the above patent,
The bearing carriage used consists of a conventional arcuate guide rod and a slidable follower. This patent shows an apparatus that pivots at the entrance edge of the entrance ramp roller in one embodiment, pivots slightly forward of the entrance ramp roller in another embodiment, and in yet another embodiment. In the example, the pivot point is located far forward of the inlet ramp roller.

US Pat. No. 1g 3.615.048 discloses a web guiding device in which the inlet and outlet ramps are equipped with F-rollers mounted on a spring-loaded pivoting structure. The structure is pivoted about an origin resting on the inlet edge of the inlet ramp roller by a push rod that exerts a lateral force on the spring assembly.

U.S. Pat. No. 5,693,855 discloses a web guiding device that uses three angled rollers, each roller pivotable about its own pivot center, and each roller having a guide as previously described. It is equipped with a rod and follower type bearing carriage. The entrance ramp roller and intermediate ramp roller pivot about a pivot point through their respective centers, while the exit roller pivots about a pivot point that rests on its outer edge.

U.S. Pat. No. 3,682,362 uses a bearing carriage that includes a guide rod and a slidable follower, and also includes an inclined roller that pivots about a pivot point located at the inlet edge of the inlet inclined roller. Yet another web guiding device is disclosed.

US patent number! No. 1, 724.752 discloses a web guiding device having the same characteristics as described above.

U.S. Pat. No. 4,069,959 discloses a web guiding device comprising inlet and outlet angled rollers mounted on a first frame. The first frame pivots relative to the second fixed frame by a pivot linear bearing. These pivot linear bearings include a fixed sleeve member attached to the fixed frame and having a predetermined orientation to allow the inclined roller frame to pivot only about selected pivot points; It consists of a guide rod to provide slidable linear movement. Each guide rod is provided with a plurality of axially oriented tracks within which ball bearings are housed to facilitate sliding movement of the guide rod within the bearing sleeve.

This device provides a pivoting motion of the #If+ roller as a pivot center resting on the outer edge of one of the inclined rollers.

U.S. Pat. No. 4,103,859 discloses a means for pivoting a frame, such as those used to support inclined rollers on a web guide, about a selected axis.

The bearing assembly includes a bearing block having a longitudinal hole in each preselected orientation and mounted on a fixed portion of the device. The bore in each block houses a ball bearing bushing suitable for sliding engagement with the bearing rod. Each bearing rod is carried by a pivoting portion of the device via an attachment to a pivot coupling. Although this patent teaches that the orientation of the bearing block holes and the bearing ballast is determined as a preselected pivot point, U.S. Pat.
．． No. 619 discloses a web guiding device in which two upwardly sloping roller support frames pivot about a pivot bin assembly M located either near or below one of the slanting rollers. The bearing carriage of this device includes four flat bars fastened to a fixed frame and four pole casters attached to a pivoting frame. Each pole caster member includes a support block having a rectangular hole and two pole casters, one of the two pole casters being attached to the upper surface of the hole and the other being attached to the upper surface of the hole. When the device is assembled, the flat rod passes through the hole in the support block and the ball caster abuts the rod.

U.S. Pat. No. 4,291,825 discloses a web guiding system that includes a tilted roller mechanism and an electronic sensing mechanism for automatic adjustment thereof. The pivoting inclined roller frame of this device is supported by a vertically disposed fixed frame member and is secured to the latter by a pivot link. The pivot center of the inclined roller frame is located a considerable distance in front of the inlet inclined roller.

From the foregoing description of much of the prior art, it can be seen that a variety of sliding, rotating and rolling bearing carriages have been used, some of which have a pivot point located at the optimum position, i.e. at the inlet edge of the inlet roller. It can be appreciated that some use pivot points offset therefrom.

The device of the present invention overcomes many of the drawbacks of these previously used devices, is simple in construction, durable, inexpensive to purchase and maintain, and has many advantages not found in previous devices. Optimum positioning of the pivot center or pivot point is achieved while using a bearing carriage with a

According to the invention, the pivot point is positioned to allow the inclined roller to pivot in an arcuate path with any desired radius, thus obtaining an optimal control effect on the running web. A web guiding device is provided that overcomes the limitations of prior art structures by providing a relatively frictionless bearing means that allows for.

a downwardly fixed inclined roller support means mounted with a plurality of first bearing means and an upwardly pivoting inclined roller support mounted with a plurality of second bearing means adapted to roll into engagement with said first bearing means; A web guiding apparatus is provided that includes means, an entrance ramp roller having an entrance edge attached to the pivot ramp support means, and an exit ramp roller mounted to the pivot ramp support means. In this device,
The pivot point, or origin of the pivot radius, of the pivoting ramp roller support means is located at the midpoint of the line defined by the entry edge of the entry ramp roller.

In a preferred embodiment of the device of the invention, the inlet and outlet angled rollers are mounted on an upper angled roller support frame which is pivotally mounted on a lower fixed angled roller support frame. Two pairs of rotatable hardened V-shaped bearing wheels are mounted on the fixed angled roller support frame and oriented in a plane substantially parallel to the plane defined by the web.

Additionally, two pairs of hardened steel square bearing tracks suitable for supporting engagement with the square bearing wheels are attached to the pivoting inclined roller support means. Each pair of bearing wheels and an opposing pair of bearing tracks are arranged along an arc having a pivot center at the midpoint of a line defined by the inlet edge of the inlet ramp roller. Thus, when it is desired to displace the position of the pivoting inclined roller support means and thereby alter the path of the running web, a substantially bipolar force is exerted on the pivoting inclined roller support means. , which causes the attached track to move in the groove of the free-rotating square bearing ring and causes rotation of the pivoting inclined roller support means relative to the stationary inclined roller support means.

The device of the invention provides guidance because the movement of the ■-shaped bearing ring in rolling contact, rather than sliding, with respect to the ■-shaped bearing track makes the arcuate movement of the inclined roller bearing means substantially frictionless. It is superior to the type that uses a rod and follower. Because of this rolling movement, there is virtually no loss of the V-shaped wear element resulting from pivoting of the pivoting inclined roller support means. On the other hand, the laminates or other surfaces of conventional guide rods and followers inevitably wear out as a result of continuous sliding M-scraping. As a result of the non-wearing V-shaped bearing system, the arc over which the pivoting tilt roller support means moves need not be of large radius as taught by the prior art using guide rods and follower bearings. The pivot point position at which the pivoting inclined roller support means moves can be selected to obtain maximum control over the position of the running web. That is, the pivot point is located at the midpoint of the line defined by the inlet edge of the inlet ramp roller.

Another advantage of the device of the present invention is that the hardened bearing surfaces are substantially free from wear, so that the dimensions of the obstruction element remain substantially constant during use, thereby allowing the bearing element to be removed cyclically as a result of wear. Eliminates the need to tighten or otherwise adjust. Because of this durability of the bearing element, the device web guiding characteristics remain essentially constant throughout its service life. This is in contrast to conventional use, which required periodic adjustment or replacement of the bearing elements to compensate for the wear inherent in the use of any of the bearing carriages mentioned above, where sliding or rotating contact occurred between the bearing element surfaces. In contrast to aspect.

Thereby, the web guidance accuracy is greatly improved in the present invention.

The use of hardened steel rolling bearings in this equipment further
Bearings on the outer edges of the pivoting inclined roller support means to avoid uneven wear patterns that occur on these flat surfaces when the guide rods and followers are used in devices with pivoting arcs of short radii of curvature. Eliminates the need to position the body. 1 The device of the present invention also overcomes the disadvantages of using various bearing devices using ball bearings or pole casters.

The movement of both ball bearings and pole casters is based on the ball (pole)
Continuous sliding friction between the ball and its housing causes wear to the race or other structure in which the ball itself is housed. In contrast, this type bearing ring makes contact with the bearing track only at one continuously moving point on its outer edge and therefore wears only at such a slow rate that the bearing life can be sustained over the life of the device. . Additionally, the rolling action of the V-shaped bearing elements makes them substantially self-cleaning, so that damage to the bearing due to the accumulation of foreign matter such as dust and other debris is less likely to occur. Therefore, the device is suitable for use in environments where the accumulation of foreign matter of this type would adversely affect the performance of conventionally used guide rods, bearing bushings containing ball bearings, or bearing devices such as pole casters. can be used under virtually any environment.

Another advantage of the device is the simplicity of its bearing carriage construction. The bearing carriage consists of only a few parts,
Therefore, the purchase price of the device and its maintenance costs are reduced.

SUMMARY OF THE INVENTION Accordingly, it is a principal object of the present invention to provide a web guiding apparatus with an improved bearing carriage for pivotally supporting an inclined roller frame.

Another object of the invention is to locate the pivot point of the tilting roller at a position that allows optimum control over the path of the running web, i.e. the midpoint of the line defined by the entrance edge of the entrance ramp roller. It is an object of the present invention to provide a web guiding loading that can be positioned as follows.

An additional object of the invention is to provide a web guiding device with improved precision as a result of the close fit of the bearing carriage parts.

Yet another object of the invention is to provide a web guiding device with a bearing carriage that is wear resistant and maintains a tight fit of the parts, thus allowing the device to maintain its web guiding accuracy. .

A further object of the invention is to provide a web guide with a bearing device capable of supporting pivoting tilting roller support means in any desired position relative to both ends of the tilting roller without causing uneven wear of the bearing elements. The purpose is to provide equipment.

Yet another object of the present invention is to provide a web guiding device having a bearing carriage that is durable and of simple construction, which is not adversely affected by the accumulation of dust and other foreign matter.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

As shown in FIG. 1, the device of the invention comprises a frame 1 on which fixed inclined roller support means, such as a plate 3, are mounted. The plate 3 has four V-shaped bearing wheels 5 mounted thereon. The frame 1 is also preferably provided with a panel 2, on which suitable control equipment can be installed.

Pivotably inclined roller support means 9 are also pivotally mounted on the plate 3 to the fixed support means.

As further shown in FIG. 1, the support means 9 includes a cross member 15, an end member 17 and a pivot plate 19. The inlet inclined roller 11 is located between the end portions 17 of the pivoting inclined roller support means 9.
and exit angled rollers 137f are attached, and the direction of web movement across these angled rollers is indicated by arrow A.

As shown in FIGS. 2 and 3, the pivoting mounting of the pivoting inclined roller f1 means 9 includes a pair of V-shaped bearing wheels on the plate 302 and two pairs of V-shaped bearing wheels on the plate 302.
This is achieved by a rolling bearing engagement with the form bearing tracks 7a, 7b. The rails 7a, 7b are attached to the underside of the support plate 19 of the support means 9.

A V-type bearing system that is particularly suitable for this application is the hf,-rDUA-L-V EBJV type guide bearing and track system manufactured by Bishoppuiscarver Corporation.

The position of the V-shaped bearing ring 5 on the plate 3 and the position and orientation of the V-shaped bearing tracks 7a, 7b on the plate 19JC are shown in FIG. The position and orientation of these bearing elements are selected such that the pivot point B around which the bearing means 9 pivot is positioned at the midpoint mC-C defined by the entrance edge 21 of the entrance ramp roller 11. As shown in FIG.
and K along E-E, respectively. Preferably, as shown in FIG. 2, the rail 7a supporting the artificially inclined row 211 is a concave arcuate rail,
On the other hand, the rail 7b supporting the exit inclined roller 13 is a convex arcuate rail. A pair of bearing wheels 5 are arranged along each of the arcs D-D and E-E to provide engagement with the tracks 7b and 7a, respectively. This configuration allows close engagement of the bearing ring 5 between the rail pairs 7a and Zb. As discussed above, when the pivot points of the arcs D--D and E--E are positioned at the identified location B, the corrective effect that can be exerted by the apparatus on the web path is maximized.

Returning to FIG. 1, the frame 1 additionally includes a lower cross member 23 on the outlet side of the device.

Near each end of the lower cross member 25 there is installed an edge detector assembly 25 comprising sensing means, such as an infrared sensor 27, for determining the lateral position of the transition web. Sensor 27 is preferably calibrated to generate an electrical signal whenever the traveling web is displaced off center of the infrared beam. The signal thus generated is amplified by suitable means so as to be able to activate suitable drive means responsive to the signal as illustrated in FIG.

Depending on the polarity of the signal generated by sensor 27, the drive means is operative to rotate the pivoting tilting roller support means either clockwise or counterclockwise as necessary to modify the path of the web. do.

Specifically, in a preferred embodiment, the drive means are installed on the fixed plate 3 and are connected to the screw shaft 33 by the shaft coupling 31.
The screw shaft 33 is supported by a pivot plate 35 having a bearing 37;
The pivot plate 55 is ultimately fixedly connected to the fixed plate 6 by the pivot plate bracket 39. The pole screw nut 41 is the screw shaft 3
3, and the nut 41 is fixed to the pivot yoke assembly 43. Yoke assembly 46 includes pivot plate 1
9 is fixed to the pivot plate 19 by a fastener 45. Fastener 45
are positioned on either side of the pin 47 that pivotally connects the yoke assembly 43 to the pivot plate 19.

Thus, when the motor 29 drives the screw shaft 36, the ball screw nut 41 is caused to move laterally along the screw shaft 63. Since nut 41 is secured to pivot yoke assembly 43, the latter is also forced to move laterally. The yoke assembly 43 is attached to the pivot plate 19 using the fastener 45.
As a result of being secured by and pivoted by pin 47, lateral movement of yoke assembly 45 is converted into clockwise or counterclockwise arcuate movement of pivot plate 19 as shown in FIG. This arcuate movement of the pivot plate 19 of course results in an arcuate interlocking of the entire support means 9. This results in
The inlet and outlet inclined rollers 11 and 15 perform the same arcuate movement guided by V-shaped bearing elements 5.7a and 7b, respectively.

Additional elements shown in FIG. 2 provide support means 9 for the device operator.
enables the generation of electrical signals to give information regarding the position of the object. For this purpose, a connecting link mounting block 49 is attached to the pivoting yoke assembly 46. Attachment block 49 is pivotally connected to transducer block 51 by connecting link 53. The series of elements is completed by the attachment of the slip line potentiometer 55 to the transducer block 51 by a slip line 57.

This mechanical linkage allows the pivoting yoke assembly 43
is transmitted to the slip line 57 of the potentiometer 55. Thus, a constant electrical signal is applied to the potentiometer 55.
When transmitted through, the change in the signal resulting from the movement of the slip wire 57, i.e. from the change in potential across the potentiometer 55, can be easily detected by suitable measuring equipment and converted into a form easily perceivable by the operator. Ru. One preferred device of this type uses an LED (light emitting diode) display to indicate the distance traveled by the bearing means 9 to correct the course of the running web.

Although specific examples of the invention have been described above, it should be noted that many modifications may be made within the spirit of the invention.

[Brief explanation of the drawing]

1 is a perspective view of the device of the present invention, FIG. 2 is a top view of a portion of the device, showing in phantom the left-right pivot position of the inclined roller and its support means, and FIG. 2 is a sectional view of the device taken along line 3-3 in FIG. 2. FIG. 1: Frame 3: Identification type inclined roller support means 5: Bearing ring 9: Pivoting type inclined roller support means 15: Transverse member 17: End member 19: Pivoting plates 7a, 7b: Support track 11: Entrance inclined roller 15: Exit inclined roller 25: Detector assembly 27: Sensor 29: Reversing motor 33: Screw shaft 47: Pin

Claims (1)

Claims: 1) fixed inclined roller support means fitted with at least one M1 bearing means and pivoting fitted with at least one second bearing means in rolling bearing engagement with said first bearing means; an inlet angled roller having an inlet edge, the first and second bearing means having an inlet edge of the inlet angled roller; a web characterized in that it is arranged along at least one circular arc having a pivot point located on a line defined by an edge, whereby said pivoting inclined roller support means pivots about said pivot point; Guidance device. 2) One of the first and second bearing means comprises a track member having an arcuate edge portion, the rail member edge portion having a cross-sectional shape of a contour, and the other of the first and second support means comprises a track member having an arcuate edge portion; Claim u1 comprising a rotating member which also has a section and has a cross-sectional shape that substantially fits into the edge portion of the track member.
1. The device according to item 1. 3) A device according to claim 2, wherein the edge portion of the track member has a cross-sectional shape having a substantially V-shaped portion. 4) A device according to claim 2, wherein the edge portion of the rotating member has a cross-sectional shape having a substantially V-shaped portion. 5) A device according to claim 2, wherein the first bearing means comprises a track member and the second bearing means comprises a rotating member. 6) A device according to claim 2, wherein the first bearing means comprises a rotating member and the second bearing means comprises a track member. 7) Claim 1, comprising detection means for measuring at least a linear position of the web material running on the device.
The device described in item (2). 8) A device according to claim 7, wherein the detection means comprises a sensor capable of generating an electrical signal. 9) A device according to claim 8, comprising means for amplifying the electrical signal generated by the sensor. 10) The apparatus of claim 8, wherein the sensor includes means for generating a light beam and means for generating an electrical signal in response to partial or total interruption of the original beam by the web. 11) The device according to claim 10, wherein the light generating means comprises infrared ray generating means. 12) The apparatus of claim 1, wherein the exit ramp roller is mounted on pivoting ramp roller support means. 13) fixed inclined roller support means mounted with a plurality of rotating bearing members, each of said rotating members having an edge portion having a substantially V-shaped cross section; a pivotable inclined roller support means having a plurality of bearing track members having edge portions having a substantially V-shaped cross-section in supporting engagement with and fitting edge portions of the rotating member; an entrance ramp roller and an exit ramp roller mounted on a support means, the rotary bearing member and the bearing track member having a common pivot point located at the midpoint of a line defined by the entry edge of the entry ramp roller; A running nib guiding device characterized in that the pivoting inclined roller support means is arranged along at least two circular arcs about which the pivoting inclined roller support means pivots. 14) The apparatus of claim 13, comprising a sensor comprising means for generating an infrared beam and means for generating an electrical signal in response to partial or total interruption of the beam by an edge of the running web material. 15) The apparatus of claim 14, comprising drive means responsive to an electrical signal for pivoting the pivoting tilt roller support means.