JPS5851176Y2 - web cutting device - Google Patents

Description

[Detailed description of the invention] The invention is to break up a continuous flow of connected web-like products such as business forms and create stacks that are folded into a precise number of zigzags to package these products. This relates to a device for forming a .

With the increasing use of computers, significant amounts of office paper are used every day.

These sheets are typically provided accordion-folded or zigzag-folded along a transverse perforation line.

It is also common practice to provide a continuous web forming office paper with a reference edge having entry lines that can engage pin belts on computer printouts.

In manufacturing such zigzag-folded paper,
The web is processed from the parent roll at high speeds (on the order of 1500 feet or about 457 m/min).

The web material wound as a parent roll may be preprinted or may be printed on an office paper making machine.

Furthermore, the office paper making machine forms entry lines that constitute reference edges and also forms tear lines in the transverse direction to define individual office papers.

At the end of the office paper making machine, a zig-zig folding line is provided which forms an accordion-folded web stream.

In the past, a machine operator was used at the output of the zigzag folding machine to separate the zigzag folded sheets and tear the web material as many times as necessary to form a stack that could be handled for packaging. had to be placed.

For example, a typical carton contains approximately 3000 pieces of office paper.

Since the typical length of office paper is 88 or 11 inches or about 21.6 or 27.9 degrees, it will be appreciated that at the processing speeds described above, this separation operation will occur every few minutes.

A stripe of ink was typically provided during the manufacturing process along one of the reference edges to indicate the location of separation to the operator.

Because the web material travels at such high speeds, it is virtually impossible to limit this stripe to a specific or constant transverse cut line.

In fact, even when carefully placed, this stripe extends over several pieces of office paper, so operators have typically chosen a transverse tear line approximately midway through the length of the stripe.

In this case, an operator used a blunt knife or similar cutting tool to cut the zigzag paper through it.

It should be very clear that this established method does not provide a stack of "exact number" of sheets.

Additionally, this method is time consuming and expensive in that it requires constant operator attention.

According to the invention, the above problem is solved by performing the tearing at an entirely new time and place, namely before the web enters the zigzag folding station.

The web is literally cut into pieces by preselected transverse cutting lines to obtain the correct number of office sheets, e.g. 3000 pieces.

In the embodiment shown in the accompanying drawings, this is achieved by sandwiching the web equally between two sets of rollers, the first set running at the same speed as the web, and the second or downstream set running at the same speed as the web. roller is running faster than the web speed.

Therefore, the downstream set of rollers applies tension to the web and
The web is torn along a transverse tear line located between the two sets of rollers.

The basic idea of "slitting" using two sets of rollers is not new in itself.

This concept has previously been used downstream of computers, where the web material is torn along each tear line, such as when forming insert correspondence sheets.

However, with respect to zigzag folding of an office paper web, the office paper web is passed through a small number of preselected, widely spaced points, i.e., the particular tear line to be passed through without cutting the tear line. It is thought that it has not been known that it can cut into pieces.

According to the present invention, best results are obtained by using an arcuate pad on the tearing roll to avoid marking, creasing, or creasing the web material.

The use of arcuate pads to selectively dissect itself
As seen in Applicant's U.S. Pat. No. 3,498,558,
Are known.

However, the benefits of using this structure and process in a machine for the formation of office paper with a precise number of zigzag folds have also not been previously appreciated.

The invention will now be described in detail with reference to the illustrative embodiments of the accompanying drawings, in which: FIG.

In the accompanying drawings, reference numeral 10 generally designates the frame of the machine of the invention, which frame is understood to provide at number 11 a bearing pedestal for a rotating element 12.

In the figure, the web W is fed along a straight trajectory, that is, a vertically downward trajectory in the figure.

The web W partially surrounds an idler roller 13 which directs the web downwardly at 2 in the figure into a linear trajectory indicated by P in FIG.

In the figure, the web W travels continuously on a track P via a pin belt mechanism generally designated by the number 14.

Advantageously, one or a pair of bin belt mechanisms is provided for each reference edge.

As can be understood from FIG. 1, hole edges 15 are provided along each edge of the web W.

Referring now to FIG. 2, frame 10 supports pivot shaft 16 in the upper center of the figure.

An L-shaped pivot arm 11 is rotatably mounted on a pivot shaft 16.

The pivot arm 11 rotatably supports a rotary element 18 at its lower left portion, and the rotary element 18
provides a pair of roller-like elements that cooperate with the rotating element 12 to apply a clamping force.

The word “clamping force” refers to element 12.
and 18 are used by gripping the web running therebetween in a manner similar to the clamping or clamping that occurs in a conventional roller nip.

In the figure, the rotating elements 12 and 18 have arcuate sections with a radius of curvature that is greater than the radius of curvature of the remainder of the roller.

Although this is shown exaggerated in FIG. 2, a conventional roller can simply be padded with the same material, and the pad is a fraction of an inch thick.

This actually provides a discontinuous roller.

Continuous rollers, on the other hand, press the web and cause wrinkles, and also stain the web if the office paper web material is carbon paper or has a carbon backing.

Referring again to FIG. 1, number 19 indicates element 20.
It shows the bearing stand that rotatably supports the.

A second rotating element 21 cooperates with element 20.

This second rotating element 21, like element 1B, is mounted on a single-shaped pivot arm, in this case the lower pivot arm being designated by the number 22.

The pivot arm 22 is rotatably mounted on a pivot shaft 23 supported within the frame 10.

In the figure, the diameters of rollers 20 and 21 are the diameters of rollers 12 and 1B.
is larger than the diameter of rollers 20 and 21, so when rollers 12, 20 and 21 all rotate at the same speed, rollers 20, 21
In the nip between rollers 12 and 18, the surface velocity is greater than in the nip between rollers 12,18.

As a result, tension is actually exerted on the web sandwiched between points 24 (between rollers 12 and 18) and points 25 (between rollers 20 and 21).

This results in a tear or cut along a predetermined transverse perforation line, which is indicated at 26 in FIG.

In order to apply a clamping force at selected times, i.e. after a predetermined number of transverse perforation lines have passed through a point in the trajectory P, at intervals, means consisting of an air cylinder 2γ (see No. 2 A) are provided. , are provided for rotating the arms 11 and 22.

As shown, air cylinder 21 is pivotally supported on frame 10 as at 28 and includes a telescoping piston pivotally connected to L-shaped pivot arm 22 at point 30. It has a rod 29.

Accordingly, as the time for dissection approaches, the air cylinder is energized to extend piston rod 29 and rotate arm 22 clockwise about pivot shaft 23.

However, since the time required for the action of the clamping force is relatively short and the reaction time of the air cylinder is relatively long, a cam follower 31 is provided to better control the action of the force, which cam follower 31 is connected to the pivot arm 22. The rotating cam 32 is rotatably mounted on the frame 10 and cooperates with the rotating cam 32 mounted on the frame 10.

Thus, when the air cylinder is energized to extend the piston rod 29, the pivot arm 22 rotates clockwise to bring the rotating element 21 into close proximity to the rotating element 20 so that it can be clamped or gripped.

Thereafter, when the cam 32 is rotated to position the working profile 32a against the cam follower 31, the pinching or cutting action is completed by closing the relatively small remaining gap between the elements 20 and 21.

In the figure, if the possibility of wrinkling and suppression is acceptable,
It is desirable to operate rotating elements 18 as well, although in some cases it is also possible to utilize continuously rotating nip-forming rollers for these elements.

Preferably, however, the pivot arm 11 is connected to the pivot arm 22 via a pivot connection 33 so that when the cam follower 31 contacts the flat part 32a, the rotating element 21 moves and the element 2
0, the rotating element 18 similarly moves into engagement with the element 12 to reach a tear force application state.

Points 24 and 25 (upper pair of rollers 12 and 1, respectively)
8 and the contact area with the lower pair of rollers 20 and 21) is smaller than the length of the office paper to be formed, ie the distance between adjacent transverse perforation lines 26.

As mentioned above, for more conventional sized office papers, this length is typically 8/2 or 11 inches or about 21.6 or 27.9 crrL.

Therefore, at a given time there is only one transverse cut line between points 24 and 25.

Guide bars 36 extending on both sides of the track P are provided to ensure that the leading end 26a (see FIG. 1) of the first web continues to travel along the track force to the folding rollers 34 and 35.

More specifically, this guide bar is supported by a transverse member at 37 (see FIG. 1).

Guide bar 36 extends to a point slightly above the nip 38 between folding rolls 34 and 35.

Folding rollers 34 and 35 are provided with conventional tackers and grippers (not shown), which are commonly used in the industry.

In order to adjust the guide bar 36, the rotary elmmen 1-1
2.18. Grooves are formed in 20 and 21 as indicated by number 39 (see Figure 1).

While advancing the web W onto the trajectory P, the pin belt mechanism 14 provides greater control over the first web W.

The clamping force action time (depending on the shape and operation of the cam 32) is:
The cleavage is arranged to occur when the transverse perforation line to be cleaved is between the downstream end of the pin belt mechanism 14 and the torn article 25, ie, between points 25 and 40 in FIG.

Furthermore, the apparatus is configured such that the distance between the final contact point 40 of the pin belt mechanism 14 and the nip between the folding rollers 34, 35 is less than the length of the office paper.

This allows the rollers 34 and 35 to grip the cutting line immediately before the cutting line.

The web is then ejected in a zigzag manner from the folding rollers 34, 35 of FIG.

This drive finger 41 is normally supported in a retracted position within an annular slot of the folding roller 35.

Finger 41 serves to stuff the last end panel or office paper and also allows the just completed stack to be moved from the track P (
It also acts as a separator to temporarily support the leading edge of a new zigzag-folded stack of office paper while it is removed (for example by a pusher) and sent to the boxing process.

In this way, there is no need for the operator to stand by on the output side of the folding rollers 34,35.

If space or operational considerations preclude arranging the folding rollers 34, 35 as described above, vacuum ports in the folding rollers may be used to reduce the tip 26a of the torn web.
It is also possible to control earlier (with respect to the trajectory P).

For clarity, all gears of rotating elements 12, 18, 20 and 21 have been omitted.

Gear 42 associated with element 12 and element 20
The associated gear 43 is shown in FIG.

Due to space considerations, the gears associated with elements 18 and 21 must be axially set back relative to gears 42 and 43.

However, since the pivot shafts 16 and 23 are fixed, this is easily resolved.

The use of arcuate pads on elements 12, 18, 20 and 21 allows a considerable delay in starting or stopping these elements.

For example, the arc length of the pad is on the order of 60 degrees.

Thus, for example, a rotation of 300° is required to move the element 21 out of the clamping force state (for example via the cam 32) before the band reaches the cooperative position again.

With such a configuration, the present invention allows the office paper web to be cut at a particular perforation at a small number of preselected widely spaced points, i.e., to pass through other transverse perforations without cutting them. It is possible to tear it apart.

In addition, the clamping force is applied only when cutting is performed and is removed after cutting, so there is no need to press the web and cause wrinkles, and it is also possible to use carbon paper as the web material for office paper. Even when backside carbon is used, the web will not be soiled by pinching other parts than necessary.

In addition, a clamping force is temporarily applied on the upstream and downstream of a specific cutting line and within the length range between adjacent cutting lines, and then the cutting line immediately following the specific cutting line is placed upstream of the specific cutting line. Because the design removes the clamping force from the web, it is possible to identify the separation point without forming a special separation line in advance or using other cutting means (such as a cutting blade). The web can be accurately divided without shifting from the cutting line.

Although one embodiment of the present invention has been described in detail above, those skilled in the art may make various modifications thereto without departing from the spirit and scope of the present invention.

Some embodiments of the device of the present invention are listed below.

(1) When a long and thin web with perforation lines formed at equal intervals in a direction perpendicular to the longitudinal direction is continuously sent to a zigzag folding station via a transfer path, a predetermined position of the transfer path is set on the web. After several perforation lines have passed, a clamping force is applied to the web upstream and downstream of a particular perforation line in the transfer path and between the perforation line immediately before and immediately after the particular perforation line, respectively. , the downstream clamping force applies a speed greater than the upstream clamping force to the web to divide the web at the specific cutting line, and the cutting line immediately following the specific cutting line is the upstream clamping force application point. The web cutting device according to claim 1, which removes at least a downstream clamping force from the web before passing through the web.

(2) By engaging with the pin belt means a reference edge portion of the web located upstream of a predetermined tear line corresponding to the tearing portion and downstream of the point of application of the upstream clamping force, the predetermined tear line at the time of tearing is engaged. 2. The device according to claim 1, wherein the device is adjustable in position.

(3) At the zigzag folding station, the web is folded along each perforation line, and at this time, the perforation line immediately before the predetermined perforation line corresponding to the tearing portion is when the web is torn along the predetermined perforation line. 2. The device according to item 1, wherein the device is held by a holder.

(4) The upstream web portion of a certain perforation line corresponding to the tear portion is guided to pass through a downstream clamping force application point and to be sent to a zig-jig folding station. equipment.

(5) In an apparatus for breaking up a continuous stream of connected office papers to form packaging stacks comprising a precise number of office papers folded in a zigzag pattern, a frame and a longitudinally extending reference; means operatively associated with said frame for continuously feeding an elongate web having edges and equally spaced perforation lines defining office paper therebetween along a linear trajectory to a zigzag folding station; A clamping force is applied to the web within the length of the office paper upstream and downstream of a perforation line and on both sides of the predetermined perforation line, and the downstream clamping force is applied to the web at a speed greater than the upstream clamping force. means provided on the frame for slitting the web along the certain perforation lines by applying the web; provided on the frame for controlling the application of the clamping force and for removing at least the downstream clamping force from the web before the next perforation line of the given clipping line passes through the upstream clamping force application point; 2. The device according to claim 1, characterized in that the device comprises means for:

6. Apparatus according to claim 5, characterized in that the means for applying the clamping force comprises two pairs of rotating arcuate pads, each pair of pads being located on opposite sides of the trajectory of the web.

(7) The device according to item 6, wherein the arcuate pad that applies the downstream clamping force rotates at a higher surface speed than the arcuate pad that applies the upstream clamping force.

(8) A pivot arm is mounted on the frame, one of the rotating elements for applying a downstream clamping force is mounted on the pivot arm, and a predetermined number of perforation lines are provided on the frame along the track. 5. The device according to claim 4, further comprising means for rotating the pivot arm after passing a certain point.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view of the device of the present invention, and FIG. 2 is a partial side view of the device of the present invention. 10...Frame, 12.1B, 20.21.
... Rotating element, 17.22 ... Pivot arm, 21 ... Air cylinder, 31.
...Cam follower, 32...Cam, 34
, 35...Folding roller.

Claims (5)

[Scope of utility model registration request] (1) a frame, a transport means for transporting the elongated web having perforation lines formed at equal intervals in a direction perpendicular to the longitudinal direction to a zigzag folding station via a transport path formed on the frame; and the perforation lines. In order to apply a clamping force to the web on the upstream and downstream sides of the web, the clamping force applying means includes two pairs of rotating elements arranged on both sides of the web at a spacing smaller than the width of the gap between adjacent perforation lines; a clamping force for rotating a pivot arm connected to one of the downstream rotating elements to remove at least the downstream clamping force from the web before the immediately following tear line passes through the upstream clamping force application point; A web cutting device comprising a removing means, the web cutting device being configured such that the downstream rotating element is given a larger circumferential speed than the upstream rotating element. (2) The web cutting device according to claim 2, wherein the rotating element is comprised of an arcuate pad. (3) The arcuate bands are all configured to rotate at the same speed, and the radius of curvature of the downstream arcuate pad that applies the clamping force is larger than the radius of curvature of the upstream pad that applies the clamping force. A web cutting device according to claim 2, characterized in that it is a utility model. (4) The clamping force applying means has a pin belt means provided on the frame between the two pairs of rotating elements, and the pin belt means is located upstream of the predetermined cutting line and on the upstream side. The web cutting device according to any one of claims 1 to 3, which is configured to engage with a part of the reference edge of the web on the downstream side of the clamping force application point. . (5) The outer periphery of the rotating element has grooves spaced apart in the axial direction, and the clamping force applying means is mounted on the frame to orient the web to the zigzag folding station. 5. The web cutting device according to claim 1, further comprising a guide bar extending through the groove.