JPH0641190B2 - Air folder device for cardboard box molding - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folder device during a corrugated board box forming process, and more particularly to a corrugated board sheet having a slit groove and a folding line formed at predetermined positions by a slotter device. The present invention relates to an air folder device that carries out gluing and bending work while being conveyed in a process.

2. Description of the Related Art In general, a corrugated cardboard box molding process includes a paper feed process for supplying corrugated paperboard cut into a predetermined shape, a printing process for performing necessary printing on a predetermined portion of the corrugated paperboard, and a predetermined cut groove and a key line. A slotter cleaner process for forming a bending line, a folder process for performing gluing and bending work, a process for stacking the obtained products for each predetermined number of sheets, and a process for feeding the stacked products to a binding machine, The process of binding the delivered products is the main work process.

In the folder process, the groove grooves 2, 2 and the horizontal ridge lines 3, 3 and the vertical ridge lines 4, 4 are formed at predetermined locations as shown in FIGS. At the same time, the corrugated paper sheet 10 on which the gluing portion 5 and the tongue piece 6 for joining are formed is received, the gluing portion 5 of the corrugated paper sheet 10 is glued, and the corrugated paper is conveyed while being sequentially conveyed by the conveying belt 7. The folding belt 8 is twisted and arranged so that it starts from both sides of the belt 7 and finally reaches above the conveyor belt 7. It is in charge of sequentially bending along 3 and finally adhering the glued portion 5 to the tongue piece 6. That is, the folding belt 8 is arranged at a position from the midway portion of the conveying belt 7 to the end portion of the folder process, and the corrugated paper sheet 10 is sequentially bent along the key lines 3 and 3 from the front end in the traveling direction. Has an effect. still,
A part of weight control means for applying a constant pressure from the top of the corrugated cardboard paper 10 to prevent the deviation is also used. In the figure, 9 is a roller, 11 and 11 are cams attached to the conveyor belt 7, 12 and 12 are cams attached to the folding belt 8, and 13 is a folder drive and the size of the corrugated paper 10. The end unit for positioning of is shown.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional folder device for forming a corrugated cardboard box, the corrugated cardboard sheet 10 is mounted on the conveyor belt 7 and pushed by the cams 11, 11 to be sequentially transferred. While being bent, the bending belt 8 acts so as to sequentially bend the belt from the front end, which causes the following problems.

That is, when the corrugated cardboard is conveyed through the slotter process and the gluing process in the preceding stage, the corrugated cardboard is inclined in either the left or right width direction with respect to the traveling direction due to warpage or deviation of the corrugated cardboard. The corrugated paper sheet 10 may be inclined by the action of the folding belt 8 in such a case, although the folder process is often entered without maintaining the accurate conveyance posture. As a result of being sequentially bent from the front end portion in the direction, bending lines that do not match the above-mentioned key lines 3 and 3 are formed. Therefore, a phenomenon commonly referred to as "center misalignment" occurs in the bending line of the obtained product, and when assembled as a corrugated cardboard box, an error occurs in the size of the box and the appearance deteriorates. In particular, there are problems that the bonded cardboard sheets are easily misaligned at the leading or trailing end, the accuracy and pressure resistance of the product are significantly reduced, and defective gluing is likely to occur. Corrugated cardboard jams. There is also a drawback that a so-called jam-up phenomenon occurs and work efficiency is reduced. Especially in recent years, several types of casers are used to pack products using automatic filling machines and automatic insertion machines in the automatic packing line of the production factory for food products, which is the main demand for cardboard boxes. In many cases, due to the insertion / removal of the caser, the inner dimension accuracy of the corrugated box is strictly required, and there is a strong demand for improvement in the accuracy of the folding process.

Further, in the case of using weight control means for applying a constant pressure to the corrugated paperboard 10 on the conveyor belt 7,
Although it is possible to prevent the corrugated cardboard sheet 10 from being displaced, the weight of the weight may cause the corrugated cardboard sheet 10 to cause a "collapsed" phenomenon, thus deteriorating the quality of the product. .

Therefore, the present invention solves the problem that the conventional folder device for forming a corrugated cardboard box has, so that the corrugated cardboard paper is not misaligned during the folding work of the corrugated paperboard in the folder process. An object of the present invention is to provide an air folder device for forming a corrugated cardboard box, which can maintain high accuracy and quality and can dramatically improve work efficiency.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a conveyor belt for feeding a corrugated paper sheet having a cut groove and a folding line formed in a predetermined position in advance to a next step, and a corrugated paper sheet. A glue device for gluing in place, a folding guide rail on the top of the conveyor belt for guiding the upper surface of the corrugated cardboard, and folding guide rails arranged on both sides of the conveyor belt. A first air discharge port for ejecting compressed air for sharply bending both sides of the corrugated cardboard paper along the folding line to a predetermined angle as a bending reference, and finally a conveyance belt from both sides of the conveyance belt. The folding belt which is twisted so as to be located above the sheet, is folded by the compressed air from the first air discharge port, and which holds the corrugated cardboard sheet conveyed on the conveying belt and travels. And a second ejecting compressed air for pressing both sides of the corrugated cardboard paper, which is arranged on both sides of the folding belt and folded by the compressed air from the first air discharge port, into a substantially flat shape. And an air discharge port.

According to the present invention having the above-described structure, when the corrugated cardboard paper having the slit groove and the folding line formed at the predetermined position in the slotter cleaner process is fed into the folder process, the corrugated cardboard paper is guided by the folding guide rails on the upper surface. It is conveyed on the conveyor belt in the closed state. In this state, when the corrugated cardboard paper glued at a predetermined position is conveyed to the first air discharge ports provided on both sides of the conveyor belt, the corrugated paper is bent by the compressed air ejected from the first air discharge port. Both sides of the corrugated cardboard are sharply bent to a predetermined angle along the folding line with the guide rail as the folding reference.

Next, the corrugated cardboard paper whose both sides are bent is placed on the carrying belt while being sandwiched between the both sides of the carrying belt by the folding belt which is twisted so as to be finally positioned above the carrying belt. Both sides of the corrugated paper are crimped in a substantially flat shape by the compressed air ejected from the second air outlets arranged on both sides of the folding belt to be fixed and glued. After that, the substantially flat corrugated paper sheet is put between the carrying belt and the folding belt from the upper surface, and is sent to the next step.

Embodiment An embodiment of an air folder device for corrugated board molding according to the present invention will be described in detail below with reference to the accompanying drawings, in which the same reference numerals are given to the same components as the conventional configuration. In the configuration shown in FIG. 1 and FIG. 2, 21 is a paper feeding unit, and 22 and 23.
Is a printing unit, 24 is a die cutting unit, 25 is a slotter unit, 26 is a glue unit, 27a, 27
b is a guide rail for bending, 28 is an intermediate station of the folder portion, 29a and 29b are folding belts,
Reference numeral 30 is an end frame of the folder portion, and 31 is a counter unit for counting and stacking products. Also 7a,
7b is a conveyor belt, 32 and 32 are conveyor belts 7a,
Cam fixed to 7b at a predetermined interval, 33, 33
Indicates a roller. To the glue unit 26, a gluing device 34 suspended on the left and right frame stays is attached so that its position can be adjusted. In the illustrated example, the gluing device 34 is of a roller transfer type.

In the slotter unit 25, the cut grooves 2, 2, 2 are preliminarily set at predetermined positions, and the horizontal key lines 3, 3
The corrugated cardboard paper 10 on which the glue lines 5 and 4 are formed and the glue lines 5 and 4 in the vertical direction are formed, and the corrugated paper 10 is sequentially transferred using the rollers 33 and 33. The folding guide rails 27a and 27b are provided above the conveyor belts 7a and 7b, and guide the upper surface of the corrugated paper sheet 10 so that the corrugated cardboard paper 10 conveyed by the conveyor belts 7a and 7b does not come off the cam 32. Has become. The folding guide rails 27a and 27b occupy positions parallel to the horizontal key lines 3 and 3 formed on the corrugated cardboard paper 10, and are bent when the corrugated cardboard paper is bent along the key lines 3 and 3. It has a function as a standard. On the other hand, the folding belts 29a and 29b are stretched between pulleys arranged in the horizontal direction and pulleys arranged in the vertical direction, as will be described later in detail, and hold the folded corrugated cardboard paper 10 between them. It has a function of preventing "blurring" of the corrugated paper 10 in the width direction.

Furthermore, the cams 32, 32 are made of steel or plastic,
As shown in FIGS. 5 to 5, the mounting bolts 36, 36 are attached to the small holes 35, 35 formed at predetermined positions of the conveyor belts 7a, 7b.
The packing 37 and the nut member 38 are used for fixing. The cams 32, 32 hold the cardboard and hold the size and height of the cardboard so that the cardboard can be pushed, and the cams 32, 32 are set to advance by one pitch for each rotation of the printing drum (not shown).

On the other hand, the first air ejection ports 39, 39 for ejecting compressed air are provided at positions near the glue unit 26 near the above-mentioned transport belts 7a, 7b. The first air discharge ports 39, 39 eject air obliquely upward and, as shown in FIG. 6 and FIG.
It has a function of sharply bending the corrugated cardboard paper 10 conveyed on b from a horizontal position to a position of about 90 degrees (arrow A). Further, folding belts 29a, 29b
The second air discharge ports 40, 40 for ejecting the compressed air are also provided in the vicinity of the position passing through the intermediate station 28. The second air discharge ports 40, 40 eject air obliquely downward to generate the first air discharge ports 39, 3
The corrugated paper sheet 10 is bent by 90 from the horizontal position to a position of approximately 90 degrees, and both sides of the corrugated paper sheet 10 are continuously bent to approximately 180 degrees to press the corrugated paper sheet 10 into a substantially flat shape (arrow B). .

FIG. 8 shows an example of a mounting structure for the first air discharge port 39, which is a folding rail 88b (88) having an H-shaped cross section.
A support body 42 is attached to the brackets 41, 41 fixed to a), and a slider 43 slidable in the traveling direction of the corrugated paper 10 and a slider 43 are mounted on the support body 42.
A slider / clamper 46, which is slidable in the width direction, is attached to the operating rod 44 derived from the above. A column 47 is erected on the slider / clamper 46, and a first air discharge port 39 is attached to the top of the column 47. As a result, the position of the first air ejection port 39 can be changed in the front-rear, left-right direction and the rotation direction, and the angle adjusting mechanism 48 is provided on the top of the support column 47 to adjust the air ejection direction of the first air ejection port 39. It is possible. Further, a damper 49 for adjusting the air volume is provided on the surface of the first air discharge port 39. The duct 45 is a duct hose that supplies compressed air to the first air discharge port 39.

FIG. 9 shows the mounting structure of the second air discharge port 40. The support 51 is attached to the brackets 50, 50 fixed to the folding rails 88b (88a). A slider / slider / clamper 55 slidable in the width direction is attached to a slider 52 slidable in the traveling direction of the corrugated paper and an operating rod 53 led out from the slider 52. Then, the column 56 is erected on the slider / clamper 55, and the second air discharge port 40 is attached to the top thereof. As a result, the position of the second air discharge port 40 can be changed in the front-rear direction, the left-right direction, and the rotation direction, and the angle adjusting mechanism 5 is provided on the top of the support column 56.
7 is provided so that the air ejection direction of the second air ejection port 40 can be adjusted. A damper 58 for adjusting the air volume is also provided on the surface of the second air outlet 40. The duct 54 is a duct hose that supplies compressed air to the second air discharge port 40. The folding rail 88b is for supporting the conveyor belt 7b and for fixing the brackets 41, 50, and is arranged over the entire area of the folder device. Further, the transport belt 7a has the same structure as the folding rail 88b and is supported by the folding rails 88a which are arranged at left and right symmetrical positions.

The folding belts 29a and 29b are, as shown in FIG. 7, horizontal pulleys 59a and 59b arranged laterally of the conveyor belts 7a and 7b, and a vertical direction pulley arranged at the end of the folder device. Pulleys 60a, 60b
And a corrugated paperboard 10 having both sides bent by about 90 degrees, which are conveyed by the conveyor belts 7a and 7b, are sandwiched in the width direction, and the corrugated paperboard 10 in the width direction is shaken. It is designed to be driven together with the above. The conveyor belts 7a and 7b are supported by the folding rails 88 and 88b so that the corrugated paperboard 10 is always conveyed at a constant speed over the entire area of the folder device.

The operation of the device of the present invention having such a configuration will be described below.
As described above, the paper feeding unit 21, the printing units 22, 2
3, die cut unit 24, slotter unit 25,
The corrugated cardboard paper 10 conveyed via the glue unit 26 is glued to a predetermined portion by the glue unit 26, and the conveyance belt 7 is kept in a state of being extended in a substantially horizontal direction.
Although the conveyance is continued by the a and 7b, the corrugated paper sheet 10 is first transferred to the conveyor belts 7a and 7b in the folder process.
b and the cam 32, and reaches the upper side of the first air discharge port 39 while being guided by the bending guide rails 27a and 27b on the upper surface, the first air discharge port 3
Due to the action of the powerful compressed air jetted from 9, the bending guide rails 27a and 27b are used as the bending reference,
3 from both sides of the corrugated cardboard paper 10 from the horizontal direction
First, it is bent all at once to the 0 degree position (arrow A in FIG. 7). That is, since the notch grooves 2 and 2 and the key lines 3 and 3 as folding lines are formed in advance on the corrugated cardboard paper 10 as described above, the corrugated cardboard paper 10 is folded with the folding guide rails 27a and 27b as the folding reference. It can be bent accurately along the kay lines 3 and 3. In this manner, the corrugated cardboard sheet 10 bent to about 90 degrees is held by the folding belts 29a and 29b while being held, and is held by the folding belts 29a and 29b while being prevented from being shaken in the width direction. , 7b for the second air outlet 4
It is transported to the vicinity of 0. As described above, the second air discharge port 40 is arranged so as to eject a powerful compressed air obliquely from above toward the corrugated paperboard 10, so that the compressed air causes the corrugated paperboard 10 to be substantially flat. Folded (arrow B in FIG. 7), corrugated paper 1
The gluing part 5 of 0 is pressed and fixed to the tongue piece 6. Then, the corrugated cardboard paper 10 is conveyed to the next-stage counter and the binding unit.

In the above description of the operation, the first air discharge port 39 and the second air discharge port 39
The position and direction of the air discharge port 40 of the
The angle can be changed by adjusting 3 and the columns 47 and 56, and the angle can be changed by adjusting angle adjusting mechanisms 48 and 57.
Further, the air flow rate can be arbitrarily changed by adjusting the dampers 49 and 58, so that the folder process can be performed while adjusting the air flow rate and the direction according to the size of the corrugated paper. The folded corrugated cardboard paper 10 is sent from the end frame 30 to the counter unit 31, where it is counted and stacked to complete the process.

EFFECTS OF THE INVENTION As described in detail above, in the air folder device according to the present invention, the corrugated cardboard paper is first guided by the folding guide rails on the upper surface thereof and is compressed by the first air ejection port while being conveyed by the conveying belt. Approximately 9 from the horizontal direction along the key line formed on the corrugated paper by air
Since it can be bent all the way to the 0 degree position, this bending line can be accurately aligned with the key line. That is, unlike the conventional method of sequentially folding the corrugated paper from the tip by the action of the folding belt, the corrugated paper is folded by the strong air pressure of the air, so the folding line is prevented from shifting from the key line. As a result, the obtained corrugated cardboard paper does not cause "center misalignment". After the folding step is completed, the corrugated paper is conveyed while being prevented from being shaken in the width direction by the folding belt holding force, and the corrugated paper is made substantially flat by the compressed air ejected from the second air discharge port. Since it is pressure-bonded, the glued part is adhered without being displaced, and the product is completed. Therefore, when the obtained product is assembled into a corrugated cardboard box, the accuracy becomes extremely high, and the pressure strength can be improved.

Therefore, in the conventional folder device, only the tip of the corrugated paper in the traveling direction is acted on by a bending force to bend the corrugated paper or the bending guide rod into contact with the folding belt or the bending guide rod. , "Center misalignment" and "twisting" occurred, but in the present invention, the folded curved surfaces on both sides of the corrugated cardboard are entirely and evenly bent by the compressed air to be bent at a stretch. This enables highly accurate bending.

In addition, since it is not necessary to add a separate weight when transporting corrugated cardboard, the corrugated cardboard does not "collapse" and the product quality can be maintained in good condition. Since the phenomenon does not occur, it is possible to perform the work smoothly, and there is a great effect that the work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a plan view illustrating an embodiment of an air folder device for forming a corrugated box according to the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a perspective view showing a state where a cam is attached to a conveyor belt. FIG. 4 is a sectional view of the same main part, FIG. 5 is an exploded perspective view of the same, FIG. 6 is a perspective view for explaining the outline of the operation, and FIG. 7 is a perspective view of the entire air folder device from another angle. FIG. 8 is a partial perspective view showing a mounting example of the first air discharge port, and FIG.
FIG. 10 is a partial perspective view showing an example of mounting the second air discharge port, FIG. 10 is a plan view showing an example of a conventional folder device, and FIG.
The figure is the same side view. 2 ... Cut groove, 3 ... Horizontal key line 4 ... Vertical key line, 55 ... Adhesive part 6 ... Tongue pieces 7a, 7b ... Conveying belt 21 ... Paper feeding unit 22, 23 ... Printing unit 24 ... Die cutting unit 25 ... Slotter unit 26 ... Glue unit 27a, 27b ... Bending guide rails 29a, 29b ... Folding belt 32 ... Cam, 33 ... Roller 34 ... Gluing device, 39 ... First air discharge port 40 ... Second air discharge port 45, 54 ... Duct 48, 57 ... Angle adjusting device 49, 58 ... Damper 88a, 88b ... Folding rail

Claims (1)

[Claims] 1. A conveyor belt for feeding a corrugated cardboard sheet having a notch groove and a bending line formed in a predetermined position to a next step, a glue device for gluing the corrugated cardboard paper to a prescribed position, and a conveyor belt. Bending guide rails on the upper part of the board that guide the upper surface of the corrugated cardboard, and both sides of the conveyor belt are used as folding standards to guide the corrugated cardboard to the folding lines. A first air discharge port for ejecting compressed air for sharply bending along a predetermined angle along with, and twisted so as to be finally positioned above the conveyor belt from both sides of the conveyor belt, First
A folding belt that holds the corrugated cardboard paper that is folded by compressed air from the air discharge port and is conveyed on the conveyance belt; An air folder for forming a corrugated cardboard box, comprising: a second air ejection port for ejecting compressed air for crimping both sides of the corrugated cardboard paper bent by the compressed air from the outlet into a substantially flat shape. apparatus.