JP4701062B2 - Folder gluer - Google Patents

Description

The present invention relates to a folder gluer that folds a cardboard sheet into a box.

Patent Document 1 and Patent Document 2 will be used to explain the conventional folder gluer that folds a cardboard sheet into a box.
This folder gluer is configured to fold the outside of the folded portion of the corrugated cardboard sheet conveyed in a substantially U-shape by a plurality of correction rollers arranged in parallel along the conveying direction of the corrugated cardboard sheet. (See Patent Document 1). The cardboard sheet is pre-processed with slotter grooves for forming lids, folding ruled lines, etc., and the inside of the folded part (ruled line part) is regulated by a folding ruler, while being substantially U-shaped. And is guided to each of the correction rollers (see Patent Document 2).

  Each said correction | amendment roller is provided with a ditch | groove in a surrounding surface, and the said folding part is bent and corrected from the outer surface by allowing the outer side of the folding part of a corrugated cardboard sheet to pass through in this ditch | groove. The straightening roller is set to have a smaller opening angle of the groove as it is located on the downstream side of the corrugated sheet conveyance path. Therefore, the folded portion of the corrugated cardboard sheet is gradually folded by the inner surface of the concave groove while passing through the correction roller group.

Japanese Patent Publication No.55-017700 Japanese Patent Laid-Open No. 2005-014411

FIG. 6 shows a schematic top view of a folder gluer to which the above-described prior art is applied.
The cardboard sheet 110 that has been subjected to slotter groove processing and ruled line processing in the direction indicated by the arrow F (corrugated cardboard sheet transport direction) in FIG. 6 is transported to the folding area A from the right side of the drawing. The corrugated cardboard sheet 110 conveyed to the folding area A is pressed and folded by the folding bar 101 provided along the conveyance path while the inner side 110a of the folding part (ruled line part) is regulated by the first folding ruler 100a. Is started (see FIG. 7A).
Next, the cardboard sheet 110 is conveyed to the folding area B. The folding bar 101 further controls the inner side 110a of the folding portion while the second folding ruler 100b is arranged so as to gradually approach the machine center side in the apparatus width direction (vertical direction of the paper surface). When pressed, the corrugated cardboard sheet 110 is bent into a substantially U shape (see FIG. 7B).

  The corrugated cardboard sheet 110 folded in a substantially U shape is then conveyed to the folding area C. In the folding area C, a plurality of correction rollers 104 are arranged in parallel along the conveyance direction of the corrugated cardboard sheet 110 to constitute a first correction roller group 103a. The inner side 110a of the folded portion (ruled line portion) of the corrugated cardboard sheet 110 is supported by the guide rod 102, and the corrugated cardboard is provided in the concave groove 105 provided on the peripheral surface of each correcting roller 104 constituting the first correcting roller group 103a. By passing the outer side 110b of the folded part of the sheet 110, the folded part is bent and corrected from the outer surface (FIG. 8A).

Thereafter, the cardboard sheet 110 is conveyed to the folding area D. In the folding area D, similarly to the folding area C, a plurality of correction rollers 104 are arranged in parallel along the conveying direction of the cardboard sheet 110 to constitute a second correction roller group 103b. As described above, each of the correction rollers 104 constituting the second correction roller group 103b arranged in the folding region D has an opening angle of the concave groove 105 provided on the peripheral surface thereof, so that the first correction is performed. It is set to be smaller than the correction roller 104 constituting the roller group 103a (FIG. 8B). Therefore, the guide rod 102 is not installed after the predetermined point.
Then, the corrugated board sheet 110 is further bent, and when it passes through the most downstream correction roller 104, it is bent by 180 ° and is completely folded (FIG. 8B).

  By the way, when the bottom part 105a of the concave groove 105 of each correction roller 104 is not appropriately disposed at a position where the outer side 110b of the folded part of the corrugated cardboard sheet 110 passes, the corrugated cardboard sheet 110 is inappropriately bent. As a result, as shown in FIGS. 10A and 10B, the gap G between the edges of the panel of the boxed corrugated cardboard box 1A varies, which may cause poor box accuracy.

In the conventional folder gluer, in order to prevent this, the first correction roller group 103a and the second correction roller group 103b are configured to be integrally movable in the apparatus width direction. That is, the position of the entire correction roller group 103 can be arbitrarily set according to the folded portion (ruled line position) by translating a frame (not shown) to which each correction roller group is attached in the apparatus width direction. Is possible.
However, by simply moving the correction roller group 103 arranged in parallel along the conveying direction of the corrugated cardboard sheet 110 in this way, it is possible to reliably prevent the above-described box accuracy from being deteriorated so that high folding accuracy can be obtained. In particular, this problem is remarkable for corrugated cardboard sheets having a wide flute (step shape) configuration or base paper configuration, and there is a tendency that errors and variations in bending positions become large.

  The present invention has been devised in view of such problems, and an object of the present invention is to provide a folder gluer in which a high folding accuracy of a cardboard sheet can be obtained easily and reliably.

  In order to achieve the above-mentioned goal, the folder gluer of the present invention has a folding portion of the corrugated cardboard sheet that is conveyed with a plurality of correcting rollers arranged at a predetermined interval along the conveying direction of the corrugated cardboard sheet. A folder gluer that folds the corrugated cardboard sheet by sequentially guiding the outside of the corrugated cardboard sheet to the center of the machine in the apparatus width direction in the course of folding the corrugated cardboard sheet. They are arranged so as to approach the side (claim 1).

In order to solve the above problems, the bending behavior of the corrugated cardboard sheet passing through the folding region C and the folding region D (see FIG. 6) was analyzed in examining the appropriate position of each correction roller.
FIG. 9 is a schematic cross-sectional view of a corrugated cardboard sheet that is folded. (A), (b), and (c) are cross-sectional views taken along lines LL, MM, and NN in FIG. It corresponds. For convenience of explanation, the correction roller 104 is not drawn.

  FIG. 9A is a cross-sectional view at the folding start position. As shown in the drawing, the tip of the guide rod 102 is placed on the inner side 110a of the folded portion (ruled line portion) of the corrugated cardboard sheet 110 folded in a substantially U shape. Is arranged. Then, the cardboard sheet 110 is accurately bent at the ruled line portion by being restricted by the guide rod 102.

  Next, FIG. 9B is a cross-sectional view showing the folded state of the corrugated cardboard sheet 110 at a position where the corrugated cardboard sheet 110 is folded at about 150 °. As shown in FIG. When the folding is advanced, the outer side 110b of the folded portion of the corrugated cardboard sheet is on the inner side (machine center side in the apparatus width direction) as compared with the case where the bag is folded in a substantially U-shape (FIG. 9A). It is a point that is approaching (the amount of shift is indicated by D1).

  When the folding further proceeds, as shown in FIG. 9C, the outer side 110b of the folded portion of the corrugated cardboard sheet 110 is closer to the inner side (machine center side in the apparatus width direction) (the amount of deviation is indicated by D2). .

That is, while the inner side 110a of the folded portion of the corrugated cardboard sheet is regulated by the guide rod 102, the position of the outer side 110b is constant, but the folding process proceeds and the guide rod 102 is no longer installed. It was found that the outer side 110b gradually moved closer to the inner side (machine center side in the apparatus width direction).
Therefore, when the correction rollers 104 are arranged in parallel along the conveying direction of the corrugated cardboard sheet as in the conventional folder gluer, the gaps D1 and D2 are spaced by the gaps D1 and D2 in the concave groove 105 provided in the correction roller 104. Can be done. As a result, it was found that the corrugated cardboard sheet 110 was not restricted by being in close contact with the inside and outside of the folded portion, and as a result, an error occurred in the folding position (folding accuracy).

Therefore, in the folder gluer of the present invention, the bottoms of the concave grooves of the respective correction rollers are arranged so as to gradually approach the machine center side in the apparatus width direction in the process of folding the corrugated cardboard sheet. Therefore, it becomes possible to reliably regulate the folded portion from the outside in accordance with the displacement of the folded portion (ruled line portion) of the corrugated cardboard sheet in the folding process. As a result, the folding accuracy can be significantly improved as compared with the prior art.

In addition, it is preferable that the amount of deviation of the correction roller toward the machine center in the apparatus width direction is configured to be finely adjustable.
Further, it is preferable that the shift amount is finely adjusted based on the flute configuration and the base paper configuration of the cardboard sheet.

Furthermore, when the corrugated sheet is further folded by sequentially guiding the outer side of the folded portion of the corrugated cardboard sheet conveyed in a substantially U-shape to the concave grooves of the respective correction rollers, The roller is divided into a first correction roller group and a second correction roller group along the conveyance direction of the corrugated cardboard sheet, and the first correction roller group arranged on the upstream side is integrated with the apparatus width. A support member configured to be parallel movable in the direction and supporting the inner side of the folded portion of the corrugated cardboard sheet corresponding to the first correction roller group is disposed. The second correction roller group arranged on the downstream side is configured such that one end side is rotatably connected to the downstream side of the first correction roller group, and the other end side is movable in the apparatus width direction. (Claim 4).

  As described above, according to the folder gluer of the present invention, the bottom of the concave groove provided in the correction roller can be properly brought into close contact with the outside of the folded portion of the corrugated cardboard sheet. The folding accuracy can be obtained easily and reliably, and the manufacturing accuracy of the cardboard box can be greatly improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the main part of a folder gluer according to an embodiment of the present invention, and shows a schematic top view corresponding to FIG.
2 (a), 2 (b), and 2 (c) respectively correspond to the cross sections taken along arrows XX, YY, and ZZ in FIG.

The general configuration of the folder gluer of the present embodiment is the same as that of the prior art except for the correction roller.
That is, the cardboard sheet 1 that has been subjected to slotter groove processing and ruled line processing is conveyed from the right side of the paper surface to the folding area A as shown by an arrow F (corrugated cardboard sheet conveyance direction) in FIG.

The corrugated cardboard sheet 1 conveyed to the folding area A is moved along the conveying path while the inner side 110a of the folded part (ruled line part) is regulated by the first folding ruler 100a installed along the conveying direction of the cardboard sheet. Folding is started by the folding bar 101 provided (see FIG. 7A).
Next, the cardboard sheet 1 is conveyed to the folding area B. The folding bar 101 further controls the inner side 110a of the folding portion while the second folding ruler 100b is arranged so as to gradually approach the machine center side in the apparatus width direction (vertical direction of the paper surface). When pressed, the corrugated cardboard sheet 1 is bent into a substantially U-shape (see FIG. 7B).
The first folding ruler 100a is configured to be adjustable in parallel with the apparatus width direction. Further, the second folding ruler 100b is configured such that the amount of shift to the machine center side in the apparatus width direction can be finely adjusted.

Next, the corrugated cardboard sheet 1 folded into a substantially U shape is conveyed to the folding region C ′. In the folding region C ′, a plurality of correction rollers 4 are arranged in parallel along the conveying direction of the cardboard sheet 1 to constitute a first correction roller group 3. The inner side 1a of the folded portion (ruled line portion) of the corrugated cardboard sheet 1 is supported by the guide rod 2, and the corrugated cardboard is provided in the concave grooves 4a provided on the peripheral surfaces of the respective correcting rollers 4 constituting the first correcting roller group 3. By passing the outer side 1b of the folded part of the sheet 1, the folded part is bent and corrected from the outer surface (FIG. 2 (a)).
Here, unlike the prior art, the first correction roller group 3 is configured so as to be capable of moving in parallel with respect to the apparatus width direction. Details of the translation mechanism 7 will be described later.

Thereafter, the cardboard sheet 1 is conveyed to the folding area D ′. Note that when the sheet is conveyed to the folding region D ′, the corrugated cardboard sheet 1 is bent by about 130 ° to 140 °.
The folder gluer according to the embodiment of the present invention is characterized by the second correction roller group 5 arranged in the folding region D ′. That is, in the conventional second correction roller group, each correction roller is arranged in parallel along the conveyance direction of the corrugated cardboard sheet, similarly to the first correction roller group. In the group 5, as shown in FIG. 1, the bottom 6b of the groove 6a opened in the peripheral surface of each correction roller 6 gradually approaches the machine center side in the apparatus width direction in the process of folding the corrugated cardboard sheet 1. Each is arranged to go.

In addition, each correction roller 4 and 6 arrange | positioned in folding area | region C 'and folding area D' is set so that the opening angle of the recessed grooves 4a and 6a provided in the surrounding surface may become small gradually. Is the same as the conventional one. Therefore, the point where the guide rod 2 is not installed after the predetermined point is the same.
Therefore, the corrugated cardboard sheet 1 in which the outer side 1b of the folded portion is guided by the concave groove 6a of each correction roller 6 is further bent (FIG. 2B), and when it passes through the most downstream correction roller, it is 180 °. It is bent and completely folded (FIG. 2 (c)).

  In the embodiment of the present invention, when the folding process proceeds and the guide rod 2 is not installed, the outer side 1b of the folded part of the corrugated cardboard sheet 1 is gradually slightly moved toward the machine center side (inner side) in the apparatus width direction. Based on the above-mentioned new knowledge of approaching, the above configuration is adopted so that the outer side 1b of the folded portion is securely adhered to the bottom 6b of the concave groove 6a of each correction roller 6.

  The amount (deviation amount) that approaches the machine center side in the apparatus width direction in the process of folding the outer side 1b of the folded portion of the cardboard sheet 1 varies depending on the flute (step shape) configuration and the base paper configuration of the cardboard sheet 1 Accordingly, it is preferable that the shift amount of the bottom 6b of the concave groove 6a of each correction roller 6 toward the machine center side in the apparatus width direction is configured to be finely adjustable.

Hereinafter, the parallel movement mechanism 7 of the first correction roller group 3 and the shift amount fine adjustment mechanism 8 of the second correction roller group 5 (correction roller 6) will be described with reference to FIGS. .
FIG. 3 is a detailed view (top view) of a main part of the first correction roller group 3 and the second correction roller group 5 in FIG. 1, and FIGS. 4 and 5 are cross-sectional views taken in the direction of the arrow P in FIG. The QQ arrow sectional drawing is shown.
FIG. 3 shows only one side with respect to the machine center, but the other side has the same configuration.
First, the translation mechanism 7 will be described.
As shown in FIG. 3, the first straightening roller group 3 includes a straightening roller frame 9 and a plurality of straightening rollers 4 that are rotatably attached to the straightening roller frame 9. That is, as shown in FIG. 5, each correction roller 4 is provided with a pulley 10 via a shaft (not shown), and a belt (not shown) wound around the pulley 10 is driven. Thus, each correction roller 4 rotates in the direction of arrow R.
The correction rollers 4 are arranged in parallel at predetermined intervals along the longitudinal direction of the correction roller frame 9.
A parallel movement mechanism 7 is installed above the correction roller frame 9.

  As shown in FIGS. 3 and 4, the parallel movement mechanism 7 is attached to a frame 16 provided separately from the first correction roller group 3, and is connected to the motor 11 that can be driven to rotate in both directions. Shaft 12, bearing portions 13, 13 installed on the frame 16 to rotatably support the shaft 12, eccentric cams 14, 14 fixed to the shaft 12, and fixed on the upper surface of the correction roller frame 9, Are provided with blocks 15 and 15 provided so as to be in contact with the outer periphery of the eccentric cams 14 and 14.

  With the above configuration, when the motor 11 is driven, the shaft 12 rotates. Thereby, the eccentric cams 14 and 14 fixed to the shaft 12 rotate. Then, the blocks 15 and 15 provided in contact with the outer circumferences of the eccentric cams 14 and 14 are simultaneously translated in the same direction along the device width direction. Accordingly, the correction roller frame 9 to which the blocks 15 and 15 are fixed is also moved in parallel, and the position of the correction roller 4 (recess 4a and bottom 4b) can be finely adjusted in parallel along the apparatus width direction. It becomes possible.

Next, the shift amount fine adjustment mechanism 8 will be described.
As shown in FIG. 3, the second correction roller group 5 includes a correction roller frame 17 and a plurality of correction rollers 6 that are rotatably attached to the correction roller frame 17. That is, as shown in FIG. 5, each correction roller 6 is provided with a pulley 10 via a shaft (not shown), and a belt (not shown) wound around the pulley 10 is driven. Thus, each correction roller 6 rotates in the direction of arrow R.
The correction rollers 6 are arranged in parallel along the longitudinal direction of the correction roller frame 17 at predetermined intervals.
Further, one end (upstream side) of the correction roller frame 17 in the longitudinal direction is rotatably connected to a downstream end of the correction roller frame 17 of the first correction roller group 3 via a pin 18. Yes.
A shift amount fine adjustment mechanism 8 is installed above the correction roller frame 17.

  As shown in FIGS. 3 and 4, the shift amount fine adjustment mechanism 8 is attached to a frame 16 provided as a separate body from the first correction roller group 4 and can be driven to rotate in both directions. A shaft 20 connected to the frame 16, bearings 21 and 21 which are installed on the frame 16 and rotatably support the shaft 20, a support unit 24 which is attached to the frame 16 and supports the correction roller frame 17 so as to be movable, and a shaft. An eccentric cam 22 fixed to 20 and a block 23 fixed to the upper surface of the correction roller frame 17 and having an inner surface in contact with the outer periphery of the eccentric cam 22 are provided.

  With the above configuration, when the motor 19 is driven, the shaft 20 rotates. Thereby, the eccentric cam 22 fixed to the shaft 20 rotates. Then, the block 23 fixed to the correction roller frame 17 rotates around the pin 18 while being in contact with the outer periphery of the rotating eccentric cam 22. That is, the correction roller frame 17 to which the block 23 is fixed also rotates (swings) around the pin 18 in accordance with this. Therefore, the amount of deviation of each correction roller 6 (recess 6a, bottom 6b) attached to the correction roller frame 17 toward the machine center side in the apparatus width direction is finely adjusted according to the rotation amount of the eccentric cam 22. Become.

Various fine adjustment operations using the parallel movement mechanism 7 and the shift amount fine adjustment mechanism 8 may be performed manually by an operator using an input device (keyboard, push button, etc.) (not shown), or may be a production management device (see FIG. The preset values of the parallel movement amount and the shift amount may be automatically acquired from the production management device and set in conjunction with the movement amount. At this time, it is preferable that the movement amounts of the correction roller frames 9 and 17 are directly detected by position sensors (potentiometers) 25 and 25 attached to the correction roller frames.
Furthermore, when there is a difference between the preset value and the setting value used at the time of actual production, it is also preferable to learn (store) the setting used at the time of actual production and feed it back to the production management device. .

  Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and various modifications can be made without departing from the spirit of the present invention.

Speaking from the gist of the present invention, it is only necessary that the bottom of the groove formed in each correction roller is arranged so as to gradually approach the machine center side in the apparatus width direction in the process of folding the corrugated cardboard sheet. . Therefore, for example, in this embodiment, the first straightening roller group and the second straightening roller group are divided into two, and only the second straightening roller group is arranged so as to gradually approach the machine center side. is not. In this embodiment, since the regulation effect to the inner side of the folded portion by the guide rod is obtained, the first correction roller group is arranged in parallel.For example, when the guide rod is not installed, the entire correction roller group is gently loosened. You may arrange | position so that it may approach to the machine center side.
On the other hand, the correction roller group is not limited to two, and may be three or more. If they are connected so that they are smoothly connected to each other, finer fine adjustment can be expected.

  Further, in the present embodiment, the eccentric cam mechanism is adopted as the translation mechanism and the shift amount fine adjustment mechanism. However, the present invention is not limited to this. For example, a moving mechanism using a screw shaft and a nut screwed to the screw shaft may be used. Moreover, not only a mechanical moving mechanism but an electrical one may be adopted.

It is a schematic top view which shows the arrangement structure (principal part) of the folder gluer concerning one Embodiment of this invention. It is a cross section of the folder gluer concerning one Embodiment of this invention, (a) (b) (c) is each XX, YY, ZZ of FIG. It is a principal part detail drawing (top view) of the 1st correction roller group and 2nd correction roller group concerning one Embodiment of this invention. FIG. 4 is a cross-sectional view taken in the direction of arrow P in FIG. 3. FIG. 4 is a cross-sectional view taken in the direction of the arrow Q in FIG. 3. It is a schematic top view of the folder gluer to which the prior art is applied. In folding area A, B, it is the principal part enlarged view which showed the corrugated cardboard sheet | seat regulated and folded by the folding ruler. FIG. 5 is an enlarged view of a main part of a corrugated cardboard sheet that is folded by being regulated by a correction roller in a folder gluer to which a conventional technique is applied. It is the typical enlarged view which showed the state of the corrugated cardboard sheet | seat folded when using the folder gluer to which the prior art was applied. It is sectional drawing which shows a defective state of box accuracy.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corrugated cardboard sheet 1A Corrugated cardboard box 2 Guide rod 3 First correction roller group 4 Correction roller 5 Second correction roller group 6 Correction roller 7 Parallel movement mechanism 8 Deviation amount fine adjustment mechanism 9, 17 Correction roller frame 10 Pulley 11, 19 Motor 12 , 20 Shaft 13, 21 Bearing part 14, 22 Eccentric cam 15, 23 Block 16 Frame 18 Pin 24 Support part 25 Position sensor

Claims (4)

By arranging a plurality of correction rollers having a groove on the circumferential surface at predetermined intervals along the conveyance direction of the cardboard sheet, and sequentially guiding the outside of the folded portion of the cardboard sheet to be conveyed to each of the grooves, A folder gluer that folds cardboard sheets,
A folder gluer characterized in that the bottom of the concave groove of each of the correction rollers is arranged so as to gradually approach the machine center side in the apparatus width direction in the process of folding the corrugated cardboard sheet. 2. The folder gluer according to claim 1, wherein a deviation amount of the correction roller toward the machine center in the apparatus width direction is configured to be finely adjustable. The folder gluer according to claim 2, wherein the shift amount is finely adjusted based on a flute configuration or a base paper configuration of the cardboard sheet. 2. The folder gluer according to claim 1, wherein the corrugated sheet is further folded by sequentially guiding the outside of the folded portion of the corrugated sheet conveyed in a substantially U shape to the concave groove of each correction roller. And
Each of the correction rollers is divided into a first correction roller group and a second correction roller group along the conveyance direction of the cardboard sheet,
The first correction roller group arranged on the upstream side is configured to be integrally movable in the apparatus width direction and supports the inner side of the folded portion of the corrugated cardboard sheet corresponding to the first correction roller group. A supporting member is arranged,
The second correction roller group disposed on the downstream side is configured such that one end side is rotatably connected to the downstream side of the first correction roller group, and the other end side is movable in the apparatus width direction. thing,
A folder gluer that features.

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