JP2006150748A - Folder gluer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folder gluer for obtaining a corrugated cardboard box high in dimensional accuracy. <P>SOLUTION: A corrugated cardboard sheet is conveyed to a folding part. During the conveyance by the folding part, a first panel and a fourth panel on both sides partitioned by a longitudinal ruled line are folded at 180° along a first longitudinal ruled line and a third longitudinal ruled line formed inside the panels. The lapped parts of the first panel and a joining margin are bonded together to form a flat box A<SB>1</SB>. A pair of molding belts 21 and a pair of inclined sideways approaching belts 22 in contact with the first and fourth panels of the box A<SB>1</SB>are set in the transportation path of the box A<SB>1</SB>. When the width of the box A<SB>1</SB>is larger than a proper value, both side parts of the box A<SB>1</SB>are pressed by the molding belts 21 to be corrected to a proper width. When the width of the box A<SB>1</SB>is smaller than the proper value, the first and fourth panels are moved outside by the sideways approaching belts 22 to correct the width of the box A<SB>1</SB>to the proper width. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a folder gluer which forms a flat box body by bending and bonding both sides of a flat corrugated cardboard sheet having a joining margin on one side.

As a material for forming a flat box, a corrugated cardboard sheet S ₀ shown in FIG. 17 is conventionally known. The corrugated cardboard sheet S ₀ includes first panel P _{1 to} fourth panel P ₄ and a joining margin P ₅ divided by the first vertical ruled line a _{1 to} fourth vertical ruled line a ₄ , and the first panel P ₁ The lid flap F ₁ is connected to _one end of the fourth panel P ₄ via the horizontal ruled line b ₁ , and the bottom flap F ₂ is connected to the other end of the fourth panel P ₄ via the horizontal ruled line b _2. The

As a folder gluer that forms a flat box from the corrugated cardboard sheet S ₀ as described above, the one described in Patent Document 1 is conventionally known.

The folder gluer opposes the first panel P ₁ and the fourth panel P ₄ on both sides along the first vertical ruled line a ₁ and the third vertical ruled line a ₃ while conveying the cardboard sheet S ₀ in one direction. The flat box A ₀ as shown in FIG. 18 is formed by bending 180 ° in the direction to be bonded and bonding the overlapping portion of the bonding allowance P ₅ and the first panel P ₁ to each other.

Further, a corrugated cardboard sheet S ₁ shown in FIG. 21 is known as a material for forming a flat box. The corrugated board sheet S ₁ is composed of a third vertical ruled lines a ₃ inside the inner of the first panel P ₁ first vertical lines a ₁ and a fourth panel P ₄ from the outer border l ₁ and the inner borders l ₂ Metropolitan 2 differs from the corrugated sheet S ₀ shown in FIG. 17 in that it parallel borders Article. In the corrugated cardboard sheet folding apparatus described in Patent Document 2, the corrugated cardboard sheet S ₁ is used to bend the first panel P ₁ and the fourth panel P ₄ , and to join the joining margin P ₅ and the first panel P ₁ . A flat box is formed by bonding.
Japanese Utility Model Publication No. 6-21926 JP-A-10-296885

Incidentally, the cardboard sheet S ₀ first sides while conveying the panel P ₁ and the fourth panel P ₄ the first vertical line a ₁ and a third inside shown in FIG. 17 by the folder gluer described in Patent Document 1 When bending along the vertical ruled line a ₃ , the first vertical ruled line a ₁ and the third vertical ruled line a ₃ are each one ruled line, so that the first panel P ₁ and the fourth panel P ₄ are bent. In the middle, as shown in FIG. 19, both side portions a of the third vertical ruled line a ₃ come into contact with each other and interfere with each other, and the same state is obtained at the first vertical ruled line a ₁ part.

For corrugated sheet S ₀ is to have a core paper in which is corrugated, the strength of the side portions b is often heterogeneous. Accordingly, when bending as shown in FIG. 19, the strong side portion crushes the weak side portion, and the first panel P ₁ and the fourth panel P ₄ are folded flat by 180 °. When the box A ₀ is formed, as shown in FIGS. 20 (I) and (II), the outer folding line L ₁ is divided into the first panel P ₁ , the second panel P _2, the third panel P ₃ and the second panel P ₃ . The offset occurs in either of the vertical directions from the abutting surface (panel abutting surface) of the four panel P ₄ .

As shown in FIG. 20 (I), when the folding line L ₁ is shifted upward from the panel abutting surface which is a normal position, the overlapping width W ₁ between the joining margin P ₅ and the first panel P ₁ is as follows. larger than the appropriate width, and as shown in FIG. 20 (II), when the folding line L ₁ is biased downwardly from the panel abutment surface which is the proper position, the bonding margins P ₅ second Since the overlap width W ₂ of one panel P ₁ is smaller than the appropriate width dimension, a square box is formed when the formed flat box A ₀ is opened into a quadrangular cylinder to form a cardboard box. Therefore, there arises a problem that a corrugated cardboard box with high dimensional accuracy cannot be obtained.

On the other hand, in the corrugated sheet folding apparatus described in Patent Document 2, the vertical ruled lines a ₁ and a _{3 on the} inner sides of the first panel P ₁ and the fourth panel P ₄ are two parallel ruled lines, respectively. The folding of the ruled line is guided by the folding guide, but when the first panel P ₁ and the fourth panel P ₄ are folded, the folding guide folds either the outer ruled line of the parallel ruled line or the inner ruled line. Nothing is described about guiding the bending. For this reason, if the folding is simply from the parallel ruled lines, the first panel P ₁ and the fourth panel P ₄ are bent along the outer ruled lines of the parallel ruled lines, or folded along the inner ruled lines. Thus, as with the folder gluer described in Patent Document 1, it is impossible to obtain a cardboard box with high dimensional accuracy.

  An object of the present invention is to provide a folder gluer capable of obtaining a cardboard box with high dimensional accuracy.

  In order to solve the above-described problems, in the present invention, the cardboard sheet having a joining margin continuously provided on the side edges of the four panels and one side panel divided by the vertical ruled lines is conveyed in one direction. During the transportation, the panels on both sides are bent 180 ° along the vertical ruled line, and the joining margin connected to the side edge of the panel on one side and the overlapping part of the panel on the other side are bonded to each other to be a flat box In the folder gluer that forms a body and transports the box to the downstream side, the box is opposed to the transport path of the box on the left and right in the transport direction of the box, and the facing interval is the width dimension of the box. A pair of equalizing guides, and a pair of width-adjusting belts arranged between the pair of forming guides and in contact with the panels on both sides of the box that are bent by 180 °, are provided. The carry-out end of the belt is positioned outward from the carry-in end. In this way, an inclined configuration is adopted.

  As described above, a pair of molding guides are provided in the conveyance path of the box with an interval equal to the width of the box, and the panels on both sides are bent 180 degrees between the pair of molding guides. When the box body is conveyed by the pair of width-adjusting belts by arranging the pair of width-adjusting belts in an inclined manner so that the carry-out end is located outward from the carry-in end, 180 ° A pressing force toward the forming guide is applied to the folded panels on both sides by a width-adjusting belt arranged in an inclined manner.

  For this reason, in the case of a box body in which the width dimension of the overlapping portion of the joining margin and the panel on the other side is larger than the appropriate value and the width dimension between the outer edges of the panels on both sides bent by 180 ° is smaller than the appropriate value, The panel is moved outward by the pressing force applied by the width adjusting belt to the position where the outer edge comes into contact with the molding guide, and the overlapping portion in which the adhesion is incomplete is caused to shift, and the overlapping portion And the width dimension between the outer edges of the panels on both sides are set to appropriate values. On the other hand, in the case of a box body in which the width dimension of the overlapping portion is smaller than an appropriate value and the width dimension between the outer edges of both panels folded 180 ° is larger than the appropriate value, the outer edges of both panels are formed with a molding guide. The panels on both sides are pushed inward by the contact of the two and the panels on both sides are moved inward, causing a shift in the overlapping part where the bonding is incomplete, and the width of the overlapping part and the outer edge of the panels on both sides As a result, a box with high dimensional accuracy can be obtained.

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a folder gluer that forms a flat box A ₁ from the cardboard sheet S ₁ shown in FIG. 21 is shown.

As shown in FIGS. 1 and 2, the folder gluer is of the first panel P ₁ and the fourth panel P ₄ of the corrugated board sheet S ₁ folding and, the first panel P ₁ and bonding margins P ₅ overlapping portion of It comprises a bent portion ₁ that forms a flat box A ₁ by bonding and a molded portion 20 that molds the box A ₁ formed in the bent portion 1.

The folding unit 1 has a pair of upper transport belts 2 and a pair of lower transport belts 3 as a sheet transport device for transporting the corrugated cardboard sheet S ₁ to the downstream side.

One of the pair of upper transport belts 2 is provided at a position corresponding to the side of the second panel P ₂ of the cardboard sheet S ₁ on the first vertical ruled line a ₁ side, and the other is the third panel of the cardboard sheet S ₁ . It is provided at a position corresponding to the side portion of P ₃ on the third vertical ruled line a ₃ side.

  As shown in FIGS. 7 to 9, suction holes 4 are formed in each of the upper conveyance belts 2. Further, a suction box 5 is provided on the carrier side belt 2a below the upper conveyance belt 2, and a slit 6 extending in the moving direction of the carrier side belt 2a is formed in the belt guide plate 5a below the suction box 5. Is formed.

Therefore, when sucking the internal air of the suction box 5, the suction force is applied to the suction holes 4 of the carrier belt 2a, corrugated board sheet S ₁ is conveyed is absorbed by the carrier side belt 2a.

  As shown in FIG. 2, the lower conveyor belt 3 is shorter than the upper conveyor belt 2, and is provided below each upper conveyor belt 2 so that the carry-in end thereof substantially coincides with the carry-in end of the upper carry belt 2. ing.

Upper carrier side belt 3a of the lower conveyor belt 3 has become the corrugated fiberboard sheet S ₁ at the carrier side belt 2a of the upper conveyor belt 2 from above and below so as to sandwich, corrugated board sheet S ₁ is the carrier side of the upper conveyor belt 2 The belt is transported downstream by suction by the belt 2a and the carrier-side belt 2a of the upper transport belt 2 and the carrier-side belt 3a of the lower transport belt 3.

As shown in FIG. 4, step Below the conveyance path of the ball seat S _1, cardboard elongated in the conveying direction of the sheet S _1, a pair of first folding guide 7 and the pair of second folding guide 8 and cardboard is provided by shifting the position in the conveying direction of the sheet S _1.

As shown in FIG. 5, one of the pair of first folding guides 7 is provided at a position corresponding to the outer ruled line l _{1 of} the third vertical ruled line a ₃ formed on the cardboard sheet S ₁ , and the other Is provided at a position corresponding to the outer ruled line l _{1 of} the first vertical ruled line a _{1 in} the same manner as shown in FIG.

Further, as shown in FIG. 7, one of the pair of second bending guides 8 is provided at a position corresponding to the inner ruled line l _{2 of} the third vertical ruled line a ₃ , and the other is shown in FIG. Similarly to the above, the first vertical ruled line a ₁ is provided at a position corresponding to the inner ruled line l ₂ .

As shown in FIG. 3, each outer side of the pair of upper transport belt 2, the corrugated sheet outer borders l ₁ of each first vertical line a ₁ of the first panel P ₁ and the fourth panel P ₄ of S ₁ A pair of panel bending belts 9 (first bending means) are provided as panel bending means for bending 180 ° downward along the outer ruled line l ₁ of the third vertical ruled line a ₃ .

Corrugated sheet S ₁ facing the lower side of the carrier belt 9a of the panel folding belt 9 twisting is applied is guided by a plurality of belt guide rollers 10, delivery tip of the carrier-side belt 9a is top conveyor belt 2 The carrier side belt 2a is arranged so as to face the upper and lower sides.

Carrier-side belt 9a of the pair of panel folding belts 9, push down the first panel P ₁ and the fourth panel P ₄ of the cardboard sheet S _1, the the first panel P ₁ and the fourth panel P ₄ respectively 1 After bending by 90 ° along the outer ruled line l ₁ of the vertical ruled line a ₁ and the third vertical ruled line a ₃ , it is further bent by 90 °. At this time, the pair of first bending guides 7 guide the movement of the outer ruled line l ₁ until the first panel P ₁ and the fourth panel P ₄ are bent 90 ° downward.

In order to make the first panel P ₁ and the fourth panel P ₄ bend 90 ° along the outer ruled line l ₁ and then bend completely 90 °, the first panel P ₁ and the fourth panel P ₄ Is disposed at one end of the folding bar 11 extending in the conveying direction on the outer side of the 90 ° bent position, and the other end of the second panel P ₂ and the third panel P ₃ of the corrugated cardboard sheet S ₁ . The first panel P ₁ and the fourth panel P ₄ which are disposed below and bent by 90 ° are further bent by 90 ° in the same direction by contact with the folding bar 40.

As shown in FIG. 3, the first vertical ruled line a ₁ and the third vertical ruled line a of the corrugated cardboard sheet S ₁ shown in FIG. 21 are disposed between the pair of upper conveying belts 2 and the panel folding belts 9 provided on the outer sides thereof. ₃ of the outer borders l ₁ and the inner borders l fold forming belt 12 of the portion P ₆ between the _two as a second bending means for bending 90 ° folding along the inside border l _2, respectively.

  One end of the folding belt 12 faces a position slightly offset downstream from the carry-in end of the upper conveyor belt 2, and the other end is arranged at a position substantially corresponding to the carry-out end of the panel folding belt 9. Yes.

The carrier-side belt 12a below the folding belt 12 is guided by a plurality of belt guide rollers 13 in a range from a position slightly offset toward the downstream side from the downstream end of the first folding guide 7 to the carry-out end. The torsion is applied, and a portion P ₆ between the outer ruled line l ₁ and the inner ruled line l ₂ of the corrugated cardboard sheet S ₁ is lowered downward along the inner ruled line l ₂ guided by the second folding guide 8 at the twisted belt portion. It is designed to bend 90 °.

As shown in FIG. 3, a claw-conveying belt 14 that presses and moves the corrugated cardboard sheet S ₁ toward the downstream side is provided inside each of the pair of upper conveying belts 2. A plurality of push claws 15 that can come into contact with the trailing edge of the corrugated cardboard sheet S _{1 in} the conveyance direction are provided at equal intervals on the conveyance belt 14 with the claws.

The carry-in end of the claw-conveying belt 14 is located between the carry-out end of the lower carrying belt 3 and the carry-in end of the panel folding belt 9, and the carry-out end is located downstream from the carry-out end of the panel folding belt 9. ing. This claw-conveying belt 14 is timed to convey the corrugated cardboard sheet S ₁ so that the push claw 15 engages with the trailing edge of the corrugated cardboard sheet S ₁ conveyed by the upper conveying belt 2 and the lower conveying belt 3. The conveyance speed of the conveyance belt 14 with the claw and the conveyance speed of the cardboard sheet S ₁ by the upper conveyance belt 2 and the lower conveyance belt 3 are the same.

In the bent portion 1 having the above-described configuration, when the corrugated board sheet S ₁ between loading unit of the upper conveyor belt 2 and the lower conveyor belt 3 comes sent, the corrugated board sheet S ₁ is an upper conveyor belt 2 and a lower conveyor belt 3 is sandwiched from above and below and conveyed downstream along the first bending guide 7. In its transport course, the carrier side belt 9a of the panel folding belt 9 presses down each panel P _1, P ₄ in contact with the first panel P ₁ and the fourth panel P _4, by the carrier-side belt 9a The first panel P ₁ and the fourth panel P ₄ are bent 90 °.

At this time, the first panel P ₁ and the fourth panel P ₄ are bent along the outer ruled line l ₁ guided by the first folding guide 7.

Although FIG. 7 shows only the bent state of the fourth panel P ₄ , the first panel P ₁ is bent in the same manner.

After that, when the first panel P ₁ and the fourth panel P ₄ are bent at a predetermined angle and the rear end of the cardboard sheet S _{1 in} the conveyance direction reaches the carry-in end of the conveyance belt 14 with the claw, the conveyance belt 14 with the claw is pushed. pawl 15 is forcibly convey the corrugated board sheet S ₁ engages the rear edge of the cardboard sheet S _1.

When the first panel P ₁ and the fourth panel P ₄ are bent downward by approximately 90 °, the corrugated sheet S ₁ is transferred from the first folding guide 7 to the second folding guide 8, and the second folding guide 8. Thus, the inner ruled line l ₂ of each of the first vertical ruled line a ₁ and the third vertical ruled line a ₃ is supported.

At this time, twisting beginning of the carrier belt 12a in the fold forming belt 12 begins to press the portion P ₆ between the outer borders l ₁ and the inner borders l ₂ of the cardboard sheet S _1, it is the portion P ₆ by the pressing It can be bent downward.

In this case, the portion P ₆ is bent along the inner ruled line l ₂ of the third vertical ruled line a ₃ guided by the second folding guide 8 as shown in FIG. The first vertical line a ₁ parts is similar.

Further, when the first panel P ₁ and the fourth panel P ₄ are bent downward by approximately 90 °, the first panel P ₁ and the fourth panel P ₄ start to contact the folding rod 11, and the folding rod 11 The panels P ₁ and P ₄ are further bent in the same direction by the contact with the belt and the pressing of the carrier side belt 9 a of the panel bending belt 9.

When the cardboard sheet S ₁ reaches the carry-out end of the panel folding belt 9, the portion P ₆ between the outer ruled line l ₁ and the inner ruled line l ₂ is bent 90 ° in the vertical direction as shown in FIG. At the same time, the first panel P ₁ and the fourth panel P ₄ are bent by 180 °, and the joining margin P ₅ and the first panel P ₁ connected to the side edge of the fourth panel P ₄ are connected. overlap each other, through the pre-applied adhesive on the bonding margins P _5, bonding margins P ₅ is bonded to the first panel P _1, flat box a ₁ is formed.

As described above, the bent portion 1, the outer border is guided by the panel folding belt 9 as a first folding unit first panel P ₁ and a fourth panel P ₄ in the first folding guide 7 l ₁ is bent by 90 ° and then bent by 90 °, and the portion P ₆ between the outer ruled line l ₁ and the inner ruled line l _{2 is second} bent by the folding belt 12 as the second folding means. The cardboard sheet S ₁ is bent by 90 ° along the inner ruled line l ₂ guided by the guide 8, and the distance between the outer ruled line l ₁ and the inner ruled line l ₂ is substantially equal to the thickness of the cardboard sheet S _1. Thus, the cardboard sheet S ₁ can be folded along the outer ruled line l ₁ and the inner ruled line l ₂ with extremely high accuracy.

The flat box A ₁ formed in the bent portion 1 is fed into the forming portion 20 by the claw-conveying belt 14 at the stage where the bonding between the first panel P ₁ and the joining margin P ₅ is not completed. As shown in FIG. 2, a guide plate 16 that guides the movement of the box A ₁ is provided between the molded portion 20 and the bent portion 1.

Here, as shown in FIG. 13 (I), the bonding between the first panel P ₁ and the bonding allowance P ₅ is not completed on the box A ₁ sent from the bent portion 1 to the molded portion 20. In some cases, the width of the overlapping portion is larger than the appropriate value, and as shown in FIG. 14I, the width of the overlapping portion is smaller than the appropriate value. Further, as incomplete, as shown in FIG. 15 (I), the lower panels (first panel P ₁ and fourth panel P ₄ ) are upper panels (second panel P ₂ and third panel P ₃ ). However, as shown in FIG. 16I, the lower panel is displaced to the right in the conveying direction with respect to the upper panel. The molding unit 20 corrects the width dimension and the deviation to form a good box A.

10 to 12 show the molding part 20. The molding portion 20 includes a pair of forming belts 21 as a molding guide provided outside each of the pair of upper transport belt 2, a pair of the centering belt 22 provided on the conveying path below the box A _1, The feeding belt 23 presses the box A ₁ against the width-adjusting belt 22, and the clamping belt 24 that holds the panel joint portion of the box A ₁ from above and below and conveys it downstream. .

A pair of forming belt 21 is provided so as to each of the carrier belts 21a are opposed, the distance between these carrier-side belt 21a is being standardized in the box A ₁ is equal to the width dimension. Forming belt 21, the carrier-side belt 21a is driven to move in the same direction as the moving direction of the box A ₁ (the direction indicated by the arrow in FIG. 11).

The pair of width-adjusting belts 22 is disposed at a position in contact with the first panel P ₁ and the fourth panel P ₄ of the box A ₁ . The pair of width-adjusting belts 22 are supported so as to be swingable around the respective shafts 25 provided at the carry-in ends, and are centered on the shafts 25 by crank mechanisms 27 using the respective motors 26 as drive sources. Each swings independently while maintaining the horizontal state.

Each of the pair of width adjusting belts 22 has an inclined arrangement in which the carry-out end is located on the outer side from the carry-in end. The inclination angle is adjusted by swinging by the operation of the crank mechanism 27. For example, when the amount of overlap between the first panel P ₁ and the joining allowance P ₅ of the flat box A ₁ is larger than an appropriate value, the tilt angle is increased, and conversely, when the overlap is smaller, the tilt angle is decreased.

In the molded part 20 having the above-described configuration, when the box A ₁ is fed from the bent part 1, the box A ₁ is clamped by the feed belt 23 and the clamping belt 24 and a pair of width-shifting parts. It is pressed against the belt 22 and is conveyed downstream by the belts 22, 23, 24.

At this time, since the pair of width adjusting belts 22 is inclined, the first panel P ₁ and the fourth panel P ₄ that are in contact with the pair of width adjusting belts 22 are directed toward the pair of forming belts 21. A pressing force is applied.

For this reason, as shown in FIG. 13I, the width dimension of the overlapping portion of the joint allowance P ₅ and the first panel P ₁ is larger than the appropriate value and is incomplete, and the first panel P ₁ and the fourth panel In the case of the box A ₁ where the width dimension W ₁₁ between the outer edges of P ₄ is smaller than the appropriate value, the first panel P ₁ is in a stage where the bonding between the first panel P ₁ and the joining margin P ₅ is not completed. _{The first} panel ₄ and the fourth panel P ₄ are moved outward by the pressing force applied by the width adjusting belt 22, and the outer edge is pressed against the forming belt 21 as shown in FIG. A shift occurs in the overlapping portion of P ₁ and the joint allowance P ₅ , and the width dimension of the overlapping portion and the width dimension between the outer edges of the first panel P ₁ and the fourth panel P ₄ are set to appropriate values.

On the other hand, as shown in FIG. 14 (I), the width of the overlapping portion of the bonding margins P ₅ to the first panel P ₁ is smaller than the proper value, between the outer edge of the first panel P ₁ and the fourth panel P ₄ If the width dimension W ₁₂ is incomplete box a ₁ greater than the proper value, because at the stage where the adhesive is not completed between the first panel P ₁ and bonding margins P _5, the first panel P ₁ and the 4 outer edges of the panel P ₄ is provided by, the first panel P ₁ and the fourth panel P ₄ is inwardly pressed inwardly against the bias of the centering belt 22 by contact with the molding belt 21, bonding margins P ₅ and caused motion displacement in the first panel P ₁ of the overlapping portion, the outer 14 as shown in (II), the width and the first panel P ₁ and the fourth panel P ₄ of the overlapping portion The width dimension between the edges is an appropriate value.

Further, as shown in FIG. 15I, the lower panel (first panel P ₁ and fourth panel P ₄ ) is on the left side in the transport direction with respect to the upper panel (second panel P ₂ and third panel P ₃ ). In the case of the incomplete box A ₁ , the first panel P ₁ is pushed inward against the pressing force of the width-adjusting belt 22 by the carrier-side belt 21a of the forming belt 21, and the fourth panel P ₄ is moved outward by contact with the width-adjusting belt 22 on the right side in the conveying direction held in an inclined state and is pressed against the carrier side belt 21a of the forming belt 21, as shown in FIG. There is no deviation between the upper panel and the lower panel.

Furthermore, as shown in FIG. 16 (I), the lower panel (first panel P ₁ and fourth panel P ₄ ) is on the right side in the transport direction with respect to the upper panel (second panel P ₂ and third panel P ₃ ). In the case of the incomplete box A ₁ , the fourth panel P ₄ is pushed inwardly against the pressing force of the width-adjusting belt 22 by the carrier side belt 21 a of the forming belt 21, and the first panel P ₁ is moved outward by contact with the width-adjusting belt 22 on the left side in the conveying direction held in an inclined shape and pressed against the carrier-side belt 21a of the forming belt 21, as shown in FIG. There is no deviation between the upper panel and the lower panel.

Thus, in the molding unit 20, it is possible to correct the lateral direction of the deviation of the correction and the upper panel and the lower panel of the width of the box A _1, to form a very good flat box A ₁ be able to.

In the embodiment, the folder gluer that forms the flat box A ₁ from the cardboard sheet S ₁ shown in FIG. 21 in which the first vertical ruled line a ₁ and the third vertical ruled line a ₃ are parallel ruled lines has been described as an example. Folder gluer is not limited to this. For example, the second bending guide 8 shown in FIG. 4 and the bending belt 12 shown in FIGS. 1 to 3 are omitted, and a flat box A ₀ is formed from the cardboard sheet S ₀ shown in FIG. Folder gluer.

When the corrugated cardboard sheet S ₀ shown in FIG. 17 is supplied to the bending section 1 to form the flat box A ₀ shown in FIG. 18, the flat box A ₀ is shown in FIGS. 20 (I) and (II). As shown in FIG. ₅ , when the overlapping width of the joining margin P ₅ and the first panel P ₁ is different from the appropriate width dimension, the overlapping width is made constant by feeding these box bodies A ₀ into the molding portion 20. Corrections are made.

That is, as shown in FIG. 20 (I), when the bonding margins P ₅ to the first panel width W ₁ is an appropriate width greater than the box body A ₀ overlap P _1, the width dimension of the box body A ₀ is When the box A ₀ is sent to the molding part 20 at a stage where the bonding between the first panel P ₁ and the joining allowance P ₅ is not completed since the box A ₀ is smaller than the appropriate value, a pair arranged in an inclined manner. Since the width adjusting belt 22 moves the first panel P ₁ and the fourth panel P ₄ outward and presses them against the forming belt 21, the overlapping width of the first panel P ₁ and the joining margin P ₅ is set to an appropriate width dimension. Will be corrected.

On the other hand, as shown in FIG. 20 (II), in the case of a box A ₀ where the overlapping width W ₂ of the joining margin P ₅ and the first panel P ₁ is smaller than the appropriate width dimension, the width dimension of the box A ₀ is If the box A ₀ is fed into the molding part 20 at a stage where the bonding between the first panel P ₁ and the joining allowance P ₅ is not completed, the molding belt 21 is moved to the box A. Both sides of ₀ are pushed inward, and the first panel P ₁ and the joining margin P ₅ move inward against the pressing force of the width adjusting belt 22 and the overlapping width is corrected to an appropriate dimension. The

In this way, after the width dimension of the box A ₀ is corrected to an appropriate width dimension in the molded part 20, the bonding of the first panel P ₁ and the joining margin P ₅ is completed, and a corrugated cardboard box with high dimensional accuracy is obtained. Can do.

  In the embodiment, the forming belt 21 is a forming guide, but the forming guide is not limited to this, and may be a plate-like shape, for example.

Further, in the embodiment, the first panel P ₁ and the fourth panel P ₄ of the corrugated cardboard sheet S ₁ are bent downward by 180 ° in the folding part ₁ . The panel P ₄ may be bent 180 ° upward. In this case, the width-adjusting belt 22 shown in FIG. 12 is arranged on the conveyance path of the box A ₁ so as to contact the first panel P ₁ and the fourth panel P ₄ bent upward.

The top view which shows embodiment of the folder gluer concerning this invention Front view of FIG. The perspective view which shows the bending part of the folder gluer shown in FIG. The perspective view which shows a 1st bending guide and a 2nd bending guide Sectional drawing along the VV line of FIG. Sectional view along line VI-VI in FIG. Sectional view along line VII-VII in FIG. Sectional view along line VIII-VIII in FIG. Sectional view along line IX-IX in FIG. The front view which shows the molding part of the folder gluer shown in FIG. Plan view of FIG. Vertical side view of FIG. (I) is a plan view showing a state before the box is molded, and (II) is a plan view showing a state after the molding. (I) is a plan view showing a state before the box is molded, and (II) is a plan view showing a state after the molding. (I) is a plan view showing a state before the box is molded, and (II) is a plan view showing a state after the molding. (I) is a plan view showing a state before the box is molded, and (II) is a plan view showing a state after the molding. Perspective view showing cardboard sheet FIG. 17 is a perspective view of a flat box formed by the cardboard sheet of FIG. The side view which shows the state in the middle of bending of the 4th panel of the cardboard sheet | seat shown in FIG. (I) and (II) are side views showing a defective box Plan view showing another example of cardboard sheet

Explanation of symbols

S ₁ corrugated sheet P ₅ joining allowance a ₁ 1st vertical ruled line a ₂ 2nd vertical ruled line a ₃ 3rd vertical ruled line a ₄ 4th vertical ruled line 21 Forming belt (forming guide)
22 Widening belt 23 Feed belt

Claims (1)

  The four panels divided by the vertical ruled lines and the corrugated cardboard sheet having a joining margin connected to the side edge of the one side panel are conveyed in one direction, and during the conveyance, both panels are moved 180 along the vertical ruled lines. ° Bend to form a flat box by bonding the joint margin connected to the side edge of the panel on one side and the overlapping part of the other panel to each other, and transport the box downstream In such a folder gluer, a pair of molding guides facing the conveyance path of the box body on the left and right in the conveyance direction of the box body, and the interval between the pair is equal to the width dimension of the box body, and the pair of molding guides A pair of width-adjusting belts that are arranged in between and are in contact with each of the panels on both sides of the box that are bent by 180 °, and the pair of width-adjusting belts are arranged so that the carry-out end is located outward from the carry-in end. A folder characterized by an inclined arrangement Guru.

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