JPH07507530A - A device that stretches sheets such as cardboard that are continuously fed. - 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] Name: Continuously fed sheet stretching device for cardboard etc. Is this invention a reel? This invention relates to a device for stretching sheets such as cardboard that is continuously fed from paper.

In some industrial sectors, plain or printed sheets are supplied continuously from reels. Then, the work of cutting the /-t is performed. Work like this For example, if a piece of cardboard material to be processed into a box is supplied from a reel, This can be seen in processing equipment that cuts sheets of paper. Generally made of cardboard The reel is wound on a reel, and even after being pulled out, it is reeled to describe the shape it will take. As I remember, the piece of material cut from the sheet is wrapped around the sheet and is 11X. There is a tendency to try to maintain the natural curvature of wood. In this case, the piece of material obtained by cutting The radius of curvature of the warp changes depending on the number of windings of the sheet, and is small at the center of the reel. It is natural that the size gradually increases as you move toward the periphery.

In order to flatten the pieces of cardboard material after cutting, currently a sheet feeding device is A sheet stretching device is installed between the sheet cutting device and the lower sheet cutting device. Already The knowledge extension device consists of a pair of return cylinders whose respective axes are parallel to each other. (and the stretching pro, Sokuka, which is attached so that it can be moved between both cylinders) It will be. The two return cylinders form one plane in contact with both cylinders. , and the stretching block can be moved in the direction perpendicular to the sheet surface between both cylinders. It can be installed as shown. A stretch pro-tsuku is a small At least one pressure member is provided which presses against one side of the seat flat during operation. , and move this in a direction away from the above tangent plane between both return cylinders. , thereby forming a V-shaped seat between both cylinders. I' IIIJ! This action of the Sipro-Tsuku pressure member somewhat destroys the cardboard fibers. The natural warping of the sheet is corrected, resulting in a flat piece of material. Ru.

However, as a result of forming the above-mentioned V-shaped portion at /-t, both IJ turns /The length of the sheet is extended between the cylinders, and in order to compensate for this elongation. There will be a need to create new means for this. Currently, it is not possible to correct the elongation of the sheet. Mechanical auxiliary devices are used, for example, forming variable loops on the sheet, A movable puppet cylinder that allows you to change the length of this loop as needed. is used to correct the sheet length, especially to shorten it. However, these Reliance on means is undesirable in that it requires complex and expensive auxiliary equipment. It is clear that this is not the case.

The present invention provides a very simple sheet design that can automatically correct the sheet length. It is an object of the present invention to provide a stretching device to overcome the above-mentioned drawbacks. achieve this objective In order to do this, the sheet stretching device according to the present invention is arranged so that the sheets are passed through each other and their axes are flat against each other. two cylinders with a flat seat formed on the tangential plane of both cylinders. There is a gap between the frame supporting the turn cylinder bearing and both return cylinders. so that it can move in a direction perpendicular to the seat between both return cylinders. and an attached sheet stretching block. This sheet stretching block , hits the surface of the seat and pushes the seat away from the above tangential plane of both cylinders. Press and form the sheet into a single shape between both cylinders. two return series The bearing supports of the rollers are the bearing supports that are movably mounted on these supports. Act as a guide. In addition, a movable sheet stretching block and turn cylinder are also available. A link means is provided between both bearings of the return series, and this link means act to reduce the distance between the axes of the conductor in accordance with the amplitude of the V-shaped deformation of the sheet. , whereby the length of the sheet is automatically corrected.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The invention is not limited to this example.

Figure 1 shows a simple sheet stretching device for stretching sheets supplied from a reel. This is an explanatory diagram showing a non-operating state in which the movable sheet stretching block does not touch the sheet. It shows.

FIG. 2, like FIG. 1, is a simple explanatory diagram of the sheet stretching device, but the movable sheet Fig. 6 shows an operating state in which the V-shaped stretching block is causing a V-shaped deformation in the sheet.

FIG. 3 is an explanatory diagram showing another embodiment of the sheet stretching device.

As shown in FIGS. 1 and 2, the sheet stretching device 1 according to the invention can be It acts on the sheets 2 which are continuously drawn out from the tray 3 on which they are placed. Part 2 is When cut into pieces of material by hand, the natural reaction occurs when the material is wound on a reel. Any sheet that has so-called ``shape memory,'' which attempts to retain its shape. It's okay to have one. The example describes the case of processing cardboard sheets. However, it is clear that the device of the invention can be applied to all sheets exhibiting properties similar to cardboard. Needless to say.

The sheet 2 is fed from the reel 3 and then transferred to the upper first delivery cylinder 4. , where it is bent upward, and then sent to the upper return cylinder 5, where it is bent upward. After that, a horizontal flat part 2a is formed, and then sent to the lower return cylinder 6. There it is bent downwards, passed through the lower delivery cylinder 7, and then , and are sent to equipment such as cutting equipment that is placed in the wrong place. Reel 3 shaft and cylinder -4. 5. 8. All axes of 7 are horizontal and relative to the direction of sheet movement. It is a right angle.

The /-t stretching device 1 of the present invention includes two return cylinders 5. Placed between E3 A sheet stretching block 8 is provided. This sheet stretching block 8 , as shown by arrow f, over the frame (not shown) of the sheet stretching device. It is mounted so that it can be moved directly. In other words, the sheet stretching block 8 is The horizontal portion of the seat in the upper plane P that is horizontally in contact with the two return cylinders 5 and 6 Move at right angles to 2a. The sheet stretching block 8 extends horizontally across the sheet. It has two pressure members extending in the direction. One is placed at the top of the sheet horizontal portion 2a. One pressure lot 9 is placed at the bottom of the seat horizontal portion 2a, and the other is placed at the bottom of the seat horizontal portion 2a. This is the pressure lot 11. Pressure lots 9 and 11 are separated from each other by some distance. The sheets are separated from each other in the direction in which the sheet stretching block 8 moves. A force is applied to the horizontal portion 2a. This arrangement has two functions to correct sheet warping. It corresponds to what must be given in the direction of. Always keep the natural warpage of the sheet When correcting in the same direction, the sorting and stretching block 8 is moved by the pressure lot 9 or Needless to say, it is sufficient to provide only one of 11.

In the present invention, the bearings 12, 13 of the return/linders 5, 6 are arranged in the sheet stretching device. Each sabot provided on the frame of 1) 14. and these supports are attached to a housing that can be rectangular. Or consists of a cam.

In addition, the seat stretching block 8 and the bearings 12°13 of the return cylinders 5 and 6 Linking means is provided between them. These link means are mechanical In that case, as shown in FIGS. 1 and 2, this The link means can be constituted by connecting rods 16,17. connecting rod 16 and 17 are both arranged below the sheet horizontal portion 2a, and one of each The ends are articulated to sheet stretching blocks 8 about their respective axes 18,19. The other end is rotatable in the bearing 12.1 of the return cylinder 5, 6. 3 and is also rotatable about it. Connecting rod 16 ．． The pivot axes 18, 19 of 17 are located below the pressure rod 11 and are arranged symmetrically with respect to a longitudinal section P1 passing through the axes of both 9 and 11. Non-operating position As shown in FIG. 1, the axes of the return cylinders 5 and 6 are at a distance d from each other. only separated. In this case, the connecting rods 16, 17 extend horizontally as shown in Figure 1. or at an angle to the horizontal depending on the size of the sheet stretching equipment. There are times when it is only tilted. Furthermore, the movable bearings 12 of the return cylinders 5, 6 ．． The housing or cam 14.15 is also a component of the support guiding the 13. Also, in this inactive position, depending on the size of the sheet stretcher, the or tilt at a certain angle with respect to the horizontal.

Next, when the 7-t stretching device 1 is put into operation, the sheet is stretched as shown in FIG. The block 8 moves downward, and the pressure rod 9 comes into contact with the upper surface of the seat horizontal portion 2a. , then push this downward until it becomes a figure 7 shape with the tip pointing downwards. transform into a shape. The sheet "remembers" its shape when it was wound on reel 3. In order to reduce the tendency of the material to exhibit a crown (convex shape with medium height) when cut into pieces, However, the above operation of pressure rod 9 somewhat destroys the fibers of the sheet. As a result, the natural warping of the pieces of cardboard material that are later cut from this sheet will cause this This is corrected by On the other hand, make the horizontal part 2a of the seat into a V shape like this. When the forming operation is performed, the length of the sheet between the two return cylinders 5 and 6 is This sheet elongation must be compensated for in order for the device to function properly. There must be. In the present invention, this correction of sheet elongation This is performed by the device 1 itself. i.e. sheet stretching block 8 not only lowers, but also at this time the corresponding pivots of the connecting rods 1B, 17 The shafts 18, 19 also move downwards at the same time. Therefore, both pivot axes are respectively return Take an upward tilting position towards the cylinders 5 and 6, and Inclined supports 14 as well as bearings 12, 13 of turns/linders 5, 6 ．． 15 will be guided. As a result, bearings 12 and 13 and therefore the return cylinder dars 5 and 6 move toward each other, and the distance between the axes becomes dl as shown in Figure 2. This value corresponds to the axis shown in Figure 1 when the note stretching device 1 is in the inactive position. smaller than the distance between them. The distance between the return cylinders 5 and 6 is reduced in this way. This corrects the length of the sort in the V-shaped part, allowing for better delivery. The sort length between cylinder 4 and lower delivery cylinder 7 is kept constant. drooping

Therefore, in one embodiment of the invention, the movable return cylinder 5.6 The support (14.15) that accommodates the bearing (12.13) preferably has an upper part than a lower part of the shaft. The bearings are tilted toward the straightening block 8, thereby making the bearings 12°13 As shown in Figure 2, the two move toward each other and at the same time move slightly upward. until the seat is slightly extended.

When operating the sheet stretching device 1 in the opposite direction, the sheet stretching block 8 should be The pressure rod 11 lifts the horizontal portion 2a of the sheet upward, making this portion pointy. The pivot shafts 18 of the connecting rods 16, 17 are transformed into a figure 7 shape with the ends facing upward. ．． 19 is driven in one direction, and the connecting rods 16 and 17 are in a downwardly inclined position. , and now again the bearings 12, 13 are approaching each other and sabot) 14.15 and occupies a slightly elevated position. And in this case too Similarly, the effect of correcting the variation in sheet length can be obtained.

In another embodiment shown in FIG. 3, the upper return cylinder 5 and the lower return cylinder The cylinder 6 is located at the upper and lower sides of the tangential plane P along the horizontal portion of the sheet 2, respectively. Located on the side. Therefore, the seat 2 is located under the lower return cylinder 6. The delivery of the lower hand is bent upward after turning around and is placed above the tangent plane P. Head to Φ cylinder 7. In this case, the bearing 1 of the upper return cylinder 5 The connecting rod 16 connected to the seat 2 is located below the horizontal portion 2a of the seat 2, and On the other hand, the connecting rod 17 connected to the bearing 13 of the lower return cylinder 6 is connected to the seat. It is located above the horizontal portion 2a of the seat 2. Pivot of connecting rod 16.17 Axes 18.19 have positions symmetrical to each other with respect to the intersection of the horizontal tangential plane P and the vertical plane P1. It is in a positional relationship. The sheet stretching device shown in FIG. Due to the play in the cams 14 and 15 that make up the seat, the change in sheet length is 1°.

This is particularly advantageous because it allows for % correction.

In the above, the movable sheet stretching block 8 and return cylinder 5゜6 are used. An embodiment has been described in which the connecting link means is constituted by a connecting rod. However, this The linking means may be of any other type, such as pneumatic, hydraulic, or electrical. The movable bearings 12.1 of the return cylinders 5 and 6 are moved by the movement of the stretching block 8. What can be achieved with any servo control mechanism capable of changing the position of 3. Not even.

Claims (4)

[Claims] 1. For stretching sheets such as pole paper that are continuously supplied from the reel (3). A sheet stretching device, The sheet is passed through, the axes are parallel to each other, and the flat part of the sheet is on the tangential plane (P) of both. bearings (12, 1) of the two return cylinders (5, 6) in which the 3) A frame with supports (14, 15) and both return cylinders - can be moved in a direction perpendicular to said sheet flat part (2a) between (5, 6); having a sheet stretching block (8) mounted in such a manner that The sheet stretching block (8) hits one side of the sheet (2) and Press it away from the tangential plane (P) of both return cylinders to remove both return cylinders. The sheet is formed into a V-shape between the cylinders, and the shafts of both return cylinders (5, 6) Supports (14, 15) that support the receivers (12, 13) are movable. It serves as a guide for the bearings (12, 13) mounted in the The movable sort stretching block (8) and both return cylinders (5, 6) Link means (16, 17) are provided between the bearings (12, 13), and the link The means is to adjust the distance between the axes (d) of both return cylinders to the amplitude of the V-shaped deformation of the seat (2). It acts to reduce the width accordingly, so that the sheet length is automatically corrected. A sheet stretching device characterized by the following: 2. Supports (14, 15) that guide the bearings (12, 13) rectangular housing inclined with respect to the tangential plane (P) of the horn cylinders (5, 6) The sheet stretching device according to claim 1, comprising a ring or a cam. 3. Supports (14, 15) that guide the bearings (12, 13) A non-rectangular shape that is inclined with respect to the tangential plane (P) of the curve cylinder (5, 6) 2. The sheet stretching device according to claim 1, comprising a uzing or a cam. 4. A link means is articulated at one end to the sheet stretching block (8) and extends therefrom. It is rotatable around each axis (18, 19), and the other end is connected to the return shaft. It is articulated to the bearings (12, 13) of the cylinder (5, 6) and It is characterized by being composed of connecting rods (16, 17) that can be rotated quickly. The sheet stretching device according to any one of claims 1 to 3.