JPH0262373A - Direction changer and bender for sheet body - Google Patents

Abstract

PURPOSE:To perform the direction change of a sheet body in a highly efficient manner by installing a direction change member for turning around the sheet body being pinched and conveyed by a feed belt presser member. CONSTITUTION:A sheet body 13 is mounted on a conveyor belt l9 and carried as pressing it with a presser member 20, during this conveyance, an end of the sheet body 13 is made contact with a direction change member 24, therning it around. At this time, frictional force works between the sheet body 13 and the conveyor belt 19 by pressing force of the presser member 20, while in an interspace between the sheet body 13 and the presser member 20, the sheet body 13 is made so as to be freely travelable. Therefore the sheet body 13 is stable carried, and at the time of contact with the direction change member 24, it slides in both directions on the conveyor belt 19, thus its turnabout takes place. In consequence, longitudinal positions of the sheet body 13 are always keepable constant.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is mainly used to manufacture irregularly shaped boxes and containers using a back box machine, in which fold lines extending obliquely to the feeding direction are formed on a sheet of cardboard or the like. In some cases, the present invention relates to a sheet body turning device and a folding device that are used for folding along the creases.

BACKGROUND ART AND PRIOR ART PROBLEM TO BE SOLVED BY THE INVENTION A back box machine normally transports a sheet of cardboard or the like horizontally and folds it along creases parallel to or perpendicular to the direction of travel to produce boxes and containers. It is not possible to bend the sheet body along folding lines extending diagonally in the direction of travel.

For this reason, when manufacturing the conical container 1 for popcorn shown in FIG. 6, it has conventionally been manufactured in the following manner.

First, as shown in FIG. 6A, a substantially sector-shaped sheet body 2, which is a material, is transported by a feed belt with the creases 4 of the glue margin 3 facing parallel to the VC in the direction of travel (left direction in the figure). During this conveyance, the creases 4 are bent to the state shown in FIG. In this case, the creases 4 extend parallel to the direction of travel, so there is no difficulty in folding.

Next, as shown in FIG.
The other side portion 8 is lifted by a flat belt 9 running while being twisted and bent along the creases 5 to complete the cone-shaped container 1 shown in FIG.

In this step, when bending the crease 5, since the direction of movement and the crease are not parallel, the bending is not always along the crease 5, and other creases may be formed, causing the bending to fail. Good products may be produced.

In addition, since the portion 6 must be held between the holding belts 7 during bending, the width of the portion near the apex of the fan shape is large enough to be held firmly enough by the holding belts 7. It is necessary.

In other words, there are restrictions on the shape of the product.

In order to eliminate these inconveniences, the sheet body 2 must be
After setting the state as shown in Figure B, stop it, change the direction by applying it to a template, etc., and carry it in a direction parallel to the folding line 5.
Needless to say, it is sufficient to break the crease 5. However, this method is not actually carried out because the sheet body is temporarily stopped, resulting in a significant decrease in productivity.

Therefore, the present invention realizes a sheet body turning device and folding device that can change the direction of the sheet body while transporting it and bend the sheet body with folding lines parallel to the traveling direction, thereby achieving high efficiency.
The purpose is to make it possible to produce products of arbitrary shapes while suppressing the occurrence of defective products.

Means for Solving the Problems The present invention provides a feeding belt for carrying a sheet body, and a pressing member that is arranged in multiple stages along the feeding belt to move and hold the sheet body in the traveling direction and in the left and right directions. , a sheet body turning device comprising a turning member that brings the ends of the sheet body into contact and changes the direction of the sheet body.

The holding member used here can be of various types, such as a set of many spatulas whose tips are made of a material that is easy to slip, but it is better to use a spherical member rotatably fitted into a hole formed in the holder. It is preferable that

Further, the shape of the direction changing member is arbitrary, but it is suitable that it is a guide body that extends diagonally with respect to the feed belt and allows the sheet body to slide while coming into contact with the end of the sheet body.

Furthermore, the present invention includes the above-mentioned deflection device that deflects the fold lines extending diagonally in the direction of travel of the sheet body in parallel to the direction of travel; a clamping belt that clamps and conveys the sheet body; and a folding member that is provided along the clamping belt and pushes the other side of the folding line of the sheet body upward or downward to bend the sheet body along the folding line. This is a sheet folding device consisting of:

The bending member used here can also be constituted by a torsion spatula or a torsion guide rod extending along the direction of travel.
A flat belt that runs while being twisted in the direction of travel of the sheet body is suitable.

Operation The above-mentioned deflection device conveys the sheet body while being placed on the feed belt while being pressed by the pressing member, and during this conveyance, the sheet body is brought into contact with the deflection member at the end of the sheet body to change the direction. At this time, frictional force acts between the sheet body and the feed belt due to the pressing force of the presser member, and the sheet body can move freely between the sheet body and the presser member, so the sheet body is carried stably, and when it comes into contact with the direction change member, it can slide left and right on the feed belt to change direction. Note that during this direction change, the sheet body slides on the feed belt, which may cause a shift in the left-right position of the sheet body.
According to experiments, the amount of this shift is stable, with almost no variation among individual sheet bodies, and the left-right direction position of the sheet body after changing direction is always approximately constant.

If the above-mentioned sphere is used as the holding member, the rotation of the sphere will cause the sheet body to change direction extremely smoothly, and if the above-mentioned guide body is used as the direction change member, the direction change will occur gradually, making it even smoother. The amount of deviation becomes more stable.

The above-mentioned folding device immediately bends the creases of the sheet body using the holding belt and the bending member after making the creases of the sheet body parallel to the traveling direction by the deflection device. As mentioned above, since the sheet body sent out through the deflection device has a constant position in the left and right direction,
Accurate bending is possible simply by arranging the clamping belt and the bending member in accordance with the position of the fold line.

When the above-mentioned flat belt is used as the bending member, there is no unnecessary frictional force between the sheet body and the bending member, so it is stable and
Can be bent reliably.

EXAMPLES Below, examples illustrating the present invention will be specifically described.

A folding device 1o is shown in FIGS. 1 to 4. This bend #1
No. 0 uses a direction changing device 11, and manufactures a conical container 12 for popcorn shown in FIG. That is, the substantially fan-shaped sheet body 13 shown in FIG. 5 is bent in the previous step so that the creases 15 of the glue allowance 14 are oriented parallel to the traveling direction (left direction in the figure), and brought into the state shown in FIG. Accept the sheet body 13 in this state, change the direction, and
The direction is parallel to the traveling direction as shown in FIG.
The cone-shaped container 12 of the same drawing is completed by gluing the portions 18 and 18 together.

In the direction changing device 11, 19 is a feed belt, which is made of a narrow belt conveyor, on which the sheet body 13 is placed, and the first
Carry from right to left in the diagram. Reference numeral 20 denotes a holding member, and a holder 21 that extends long along the top of the feed belt 19 has a large number of holes 22.・・・・ is formed, and there are 2 spheres in each of them.
3. This sphere 23. ...
. . presses the sheet body 13 on the feed belt 19 with its own weight, and also presses the sheet body 13 on the feed belt 19 and presses the hole 22 . By freely rotating within..., the seat body 13 is allowed to move forward and laterally. Reference numeral 24 designates a direction change member, which is formed by forming a guide body 25 having a substantially U-shaped cross section in a shape that extends diagonally to the right of the feed belt 19 so as to approach the forward feed belt, and abuts the right end of the sheet body 13. While moving, it is slid and changed direction, and the crease 16 at the center is oriented parallel to the direction of travel. 26 is another guide body;
It is provided on the left side of the feed belt 19 and guides the left end of the sheet body 13.

Reference numeral 27 denotes a holding belt, which is composed of two belt conveyors and is connected to the turning device @11, and pinches and conveys the sheet body 13 from above and below. At this time, a portion 17 on the left side of the crease 16 at the center of the sheet body 13 is sandwiched, and the right end of the clamping belt is positioned slightly to the left of the crease 16.

Reference numeral 28 denotes a bending member, which consists of a flat belt 29 that extends along the right side of the clamping belt 27 and is twisted so that its cross section changes from horizontal to vertical as it advances.
Place the right part 18 of the crease 16 in step 3 and gradually lift it up.
Bend it along the crease 16.

Effects of the Invention As described above, the direction changing device of the present invention changes the direction of the sheet body by bringing the end of the sheet body into contact with the direction changing member while sandwiching and conveying the sheet body between the feed belt and the pressing member. It is possible,
Since it is not necessary to stop the sheet body, direction change can be performed with high efficiency. Further, it has an extremely simple configuration, and has the advantage that the position of the sheet body in the left and right direction after changing direction is constant. In particular, if the holding member is made of a spherical body or the deflection member is composed of a diagonally extending guide body, the deflection becomes smoother and the sheet body position after deflection becomes more stable.

The folding device of the present invention uses the above-mentioned direction changing device to make the diagonal creases of the sheet body parallel to the traveling direction and then bends the sheet body, so that the folds are accurately along the creases, resulting in defective products. In addition, there are no restrictions on the shape of products as in the past, and products of any shape can be bent.

In particular, when a twisted flat belt is used as the bending member,
More reliable bending is achieved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the folding device of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in the previous figure, and Fig. 3 is an enlarged view of the main parts of the previous figure.
FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1, FIG. 5 is an explanatory diagram showing the manufacturing process of a conical container using the same device, and FIG. 6 is an explanatory diagram showing the manufacturing process of a conventional conical container. It is. 10...Folding device, 11...Direction changing device, 12...Conical container, 13...
... Sheet body, 16 ... Center fold line,
19...Feed belt, 20...Press member, 21...Holder, 22.・・・・・・
...hole, 23.・・・・・・・・・Sphere, 24...
...Direction changing member, 25... Guide body,
27... Clamping belt, 28... Bending member, 29... Flat belt.

Claims (1)

[Scope of Claims] 1. A feeding belt for carrying a sheet body, a pressing member provided along the feeding belt for movably holding the sheet body in the traveling direction and left and right directions, and A deflection device for a sheet body, comprising a deflection member whose ends are brought into contact with each other to change the direction. 2. The sheet body deflection device according to claim 1, wherein the holding member is a sphere rotatably fitted into a hole formed in the holder. 3. The sheet body turning device according to claim 1, wherein the direction changing member comprises a guide body extending diagonally with respect to the feed belt and sliding the sheet body while bringing the end portion of the sheet body into contact with the guide body. 4. A deflection device according to claim 1 for deflecting fold lines extending diagonally in the direction of travel of the sheet body in parallel to the direction of travel; It consists of a clamping belt that clamps and conveys the sheet, and a bending member that is provided along the clamping belt and pushes the other side of the folding line of the sheet body upward or downward to bend the sheet body along the folding line. Sheet body folding device. 5. A sheet body folding device according to claim 4, wherein the folding member comprises a flat belt running while being twisted in the sheet body traveling direction.