JP2011167858A - Box making apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of damage in a folding box sent to the stacking device of a box making apparatus. <P>SOLUTION: An intermediate conveyer 2 as a low speed conveyer driven at a conveying speed V<SB>2</SB>which is lower than the discharge speed V<SB>1</SB>of the folding box A discharged from a folding device 1 intervenes between the folding device 1 and the stacking device 10. The impact of the folding box A caught by the stopper 11 of the stacking device 10 is reduced, and sending to the stacking device 10 is carried out at an interval between the folding boxes A by setting the conveying speed V<SB>2</SB>of the intermediate conveyer 2 to meet the following formula (1): V<SB>1</SB>×L<SB>A</SB>/(L<SB>A</SB>+S<SB>1</SB>)<V<SB>2</SB><V<SB>1</SB>(wherein, L<SB>A</SB>is the length in the carrying direction of the folding box A and S<SB>1</SB>is a carrying interval between the folding boxes A before deceleration). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a folding device that forms a folding box for a box by folding a blank into a ring shape, and a box making device that includes a stacking device that stacks the formed folding boxes.

  The box making apparatus folds cardboard and cardboard blanks in the form of unfolded boxes that are sequentially supplied at a predetermined interval while folding them in a ring while transporting them with a conveyor belt, and bonding both ends of the annularly folded blanks. A stacking device for stacking folding boxes that are sequentially fed one by one at intervals from the folding device is disposed downstream of the folding device formed in the folding box for the box.

  Such a box making apparatus includes a folder gluer that forms a folding box that overlaps a pair of outer flaps on the outside of a pair of opposed inner flaps when each blank flap is formed into a substantially rectangular shape and later assembled into a box. Each flap has an irregular shape, and when assembled into a box, these flaps are combined in a staggered manner to form a one-touch type folding box that prevents the bottom from coming off without using adhesive tape, fasteners, etc. There is a one-touch box forming glue.

  In the folder gluer, a printing device that performs flexographic printing on a sheet-like cut sheet, a rotary creaser that puts a ruled line for folding on the cut sheet that has been printed, and a blank in the shape of an unfolded box are formed from the cut sheet. For this reason, there are many flexo folder gluers in which a processing apparatus provided with a blank forming apparatus having a rotary slotter or the like for grooving is arranged on the upstream side of the folding apparatus. Moreover, in the one-touch box forming gluer, a blank that has been printed or punched into a developed shape of a predetermined box is supplied to the folding device.

  Folding boxes sent out from the folding device are sequentially fed to the stacking device at intervals, either directly or via a feed conveyor, and the stacking device is received by a stopper disposed facing the folding box to be fed in the feeding direction. Then, drop them into the hopper in an almost horizontal position and stack them sequentially from the top.

  In the stacking device, the folding boxes once stacked in the hopper from the upper side are discharged to the discharge conveyor one by one from the lower side of the hopper, the number of the folded folding boxes is measured, and the downstream side of the discharge conveyor The number of folding boxes stacked from the upper side in the hopper is measured by measuring the number of folding boxes that are stacked at a predetermined number from the lower side (see, for example, Patent Document 1) and the number of folding boxes fed at the entrance of the stacking device. There is a type (for example, refer to Patent Document 2) that discharges to the discharge conveyor one by one.

  In a box making device such as a flexo folder gluer in which a processing device equipped with the printing device or blank forming device is arranged on the upstream side of the folding device, the conveying speed in the folding device is set to the same speed as the conveying speed in the processing device. Is done. For example, in a flexo folder gluer in which the conveyance speed in the folding apparatus is set to the same speed as the printing speed in the printing apparatus, the conveyance speed may be as high as 400 m / min or more, and between blanks supplied to the folding apparatus Is determined by the circumference of the plate cylinder of the printing apparatus and the length dimension of the cut sheet in the printing direction. The conveyance speed and the space between the blanks in this folding device are kept constant, and the formed folding box is sent out at high speed with an interval, and is fed into the stacking device.

Japanese Patent No. 3363397 Japanese Patent No. 4213963

  In the box making apparatus described above, the folding box sent out from the folding device at a high speed and fed into the stacking device is received by the stopper of the stacking device arranged facing the feeding direction, so that the impact when colliding with the stopper As a result, there is a problem that the tip portion is bent or the like is damaged. If the folding box to be fed is tilted in the horizontal plane and its tip collides obliquely with the stopper, the damage becomes more severe. A folding box in which such damage has occurred becomes a defective product.

  Therefore, an object of the present invention is to prevent the folding box fed into the stacking device of the box making apparatus from being damaged.

In order to solve the above-mentioned problems, the present invention provides a stacking device disposed downstream of a folding device, and the folding device is a corrugated cardboard or cardboard having a developed shape of a box that is sequentially supplied at a predetermined interval. The blanks are folded in an annular shape while being conveyed, and both ends thereof are bonded to form a folding box for the box, and the folding box sent out from the folding device at an interval is sent to the downstream stacking device, and the stacking is performed. In the box making apparatus, the folding box to be fed is received by a stopper disposed opposite to the feeding direction and stacked downward, and the folding apparatus is arranged between the folding apparatus and the stacking apparatus. than the conveyance speed V ₁ of the interposed low-speed conveyor being driven at a slower transport speed V _2, the length dimension in the transport direction of the folded box L _A, the spacing between folded box fed from the folding apparatus when the S _1, the conveying speed V ₂ of the low speed conveyor, set to satisfy the following equation (1), at the low speed conveyor the folding box has been decreased transport speed V _2, employing the configuration as receive by the stopper of the stacking device.
_{V 1 · L A / (L} A + S 1) <V 2 <V 1 (1)

That is, the folding between the device and the stacking device, than the conveying speed V ₁ of the folding device is interposed a slow conveyor driven at a slower transport speed V _2, the length in the conveying direction of the folded box L _A the spacing between folded boxes fed from the folding apparatus when the S _1, the conveying speed V ₂ of the low speed conveyor is decelerated to a conveying speed V ₂ at the set low speed conveyor so as to satisfy the expression (1) By receiving the folding box with the stopper of the stacking device, the impact of the folding box received by the stopper is reduced so that the folding box is not damaged.

To that regulate the transport speed V ₂ of the low speed conveyor in (1) for the following reason. When the folding box sent out from the folding device at the speed V ₁ and the interval S ₁ is conveyed by the low-speed conveyor at the conveying speed V ₂ and the interval is S ₂ , each folding box sent out is continuously conveyed by the low-speed conveyor. From the continuity of travel time that
_{(L A + S 1) /} V 1 = (L A + S 2) / V 2 (3)
Here, since V ₂ <V ₁ , S ₂ <S _1, and the folding box conveyance interval S ₂ on the low-speed conveyor is narrower than the interval S ₁ sent out from the folding device. Further, S ₂ = 0, that is, the transport speed V ₂ when the transport interval S ₂ on the low-speed conveyor is eliminated is expressed by the following equation.
_{V 2 = L A / (L} A + S 1) · V 1 (4)

Thus, (1) becomes equation of the state of the satisfied not _{V 2 ≦ V 1 · L A} / (L A + S 1), gone spacing between folded box when the deceleration, folding box received in the low-speed conveyor tip, and collides with the rear end of the box a folding received earlier, because the colliding folded box may be damaged, and regulates the transport speed V ₂ of the low speed conveyor (1) below. In the case of a stacking device of the type in which the number of folding boxes fed at the entrance of the stacking device described above is measured and the folding boxes stacked in the hopper are discharged to the discharge conveyor by a predetermined number of times, the spacing between the folding boxes If there is no more, there is a problem that it becomes difficult to measure the number of folding boxes to be sent.

Further, the present invention provides a stacking device disposed downstream of the folding device, and the folding device is configured to convey a cardboard or cardboard blank in the form of an unfolded box that is sequentially supplied at a predetermined interval. And folding both ends of the folding box to form a folding box for the box, and the folding box sent out from the folding device at an interval is sent to the stacking device on the downstream side. boxes and are received by a stopper which is disposed to face the feed direction, the speed of the blank in the manufacturing box apparatus that stacking downwardly, the inlet of the folding device, which is supplied by opening a predetermined distance S ₁ than V ₁ and connecting the low speed conveyor which is driven at a slower transport speed V _2, the length of the conveying direction of the blank is taken as L _B The conveying speed V ₂ of the low speed conveyor, set to satisfy the following formula (2), a folding box which is decelerated with the conveyance speed V ₂ at the low speed conveyor, as catch by the stopper of the stacking device The configuration was also adopted.
V ₁ · L _B / (L _B + S ₁ ) <V ₂ <V ₁ (2)

That is, a low-speed conveyor that is driven at a conveyance speed V ₂ that is lower than the blank speed V ₁ that is supplied at a predetermined interval S _{1 is connected} to the entrance of the folding device, and the length dimension of the blank in the conveyance direction. the when the L _B, the conveying speed V ₂ of the low speed conveyor, (2) set to satisfy the equation, the folding box has been decreased transport speed V ₂ at a low speed conveyor, receive by the stopper of the stacking device As a result, the impact of the folding box received by the stopper is reduced so that the folding box is not damaged.

To that restricted the conveying speed V ₂ of the low speed conveyor (2) below, as well as the reason for control in the equation (1), the tip of the blank received in the low-speed conveyor, after a blank received earlier This is to prevent collision with the end and to prevent a folding box from being formed due to the absence of a conveyance interval between blanks in the folding device.

  When the low-speed conveyor or the conveyor connected to the upstream side of the low-speed conveyor is a belt conveyor having a low-friction coefficient on the conveyance surface of the conveyance belt, When a folding box or blank sheet-like conveyed product is received by the low-speed conveyor, the front side of the sheet-like conveyed item slides on the conveying surface so that the front side of the sheet-shaped conveyed item that contacts the conveying surface of the low-speed conveyor at high speed slides on the conveying surface. Curvature deformation and surface wrinkles due to side bumps can be prevented. If the conveyor connected to the upstream side is a belt conveyor having a low friction coefficient, when the sheet-like conveyed product is transferred to the low-speed conveyor on the downstream side, the sheet-like shape that is in contact with the conveying surface of the upstream conveyor Similarly, the rear side of the conveyed product slides on the conveying surface, and similarly, it is possible to prevent bending deformation and surface flaws caused by the front side of the sheet-like conveyed item.

  The belt conveyor is provided with a suction device on the back side of the conveyor belt, the conveyor belt is formed of a woven fabric, and air is sucked by the suction device through a gap between the weaves of the woven fabric, thereby being a low speed conveyor. The entire bottom surface of a folding box or blank sheet-like conveyed product that is received by a low-speed conveyor can be adsorbed to the conveying surface by a suction device and stably conveyed. The conveyor belt formed of woven fabric can suck air from the gaps in the weave, so there is no need to provide separate suction holes, and it is more like a sheet-like conveyed object than a conventional conveyor belt having suction holes at regular intervals. Can be adsorbed evenly.

  By weaving the woven fabric conveyor belt with yarn having a low friction coefficient, a conveyor belt having a low friction coefficient and excellent suction can be obtained. Examples of the yarn having a low friction coefficient on the surface include yarns formed of polyamide fiber, polyester fiber, polyfluorinated ethylene fiber, and the like.

The box making apparatus according to the present invention interposes a folding box and a stacking apparatus with a low-speed conveyor driven at a conveyance speed V ₂ lower than the conveyance speed V ₁ in the folding apparatus, and the folding box conveyance direction. When the length dimension of L is L _A and the interval between the folding boxes sent out from the folding device is S ₁ , the conveyance speed V ₂ of the low speed conveyor is set so as to satisfy the expression (1), and the low speed conveyor the box folding has been decreased transport speed V _2, since the adopted configuration to receive by the stopper of the stacking device, by decreasing the folding box shock is received by the stopper, damage to the folding box can be prevented to occur At the same time, a space between the folding boxes received by the low-speed conveyor can be secured.

In the box making apparatus according to the present invention, a low-speed conveyor driven at a transport speed V ₂ lower than the blank speed V ₁ supplied with a predetermined interval S _{1 is connected} to the entrance of the folding apparatus. , the length in the conveying direction of the blank is taken as L _B, the conveying speed V ₂ of the low speed conveyor, (2) set to satisfy the expression, folding is decelerated with the conveyance speed V ₂ at a low speed conveyor Since the box is also received by the stopper of the stacking device, the impact of the folding box received by the stopper can be reduced to prevent the folding box from being damaged and between the blanks received by the low-speed conveyor. Can be ensured.

The schematic front view which shows the box making apparatus of 1st Embodiment The conceptual diagram explaining the process until formation of a folding box and stacking in the box making apparatus of FIG. FIG. 2 is a conceptual diagram illustrating a cut sheet conveyance mode on the exit side of the printing apparatus of FIG. 1. The front view which shows the intermediate | middle conveyor interposed between the folding apparatus and stacking apparatus of FIG. Plan view of FIG. The front view which shows the stacking apparatus of FIG. (A), (b), (c) is a front view explaining operation | movement of the stacking apparatus of FIG. The schematic front view which shows the box making apparatus of 2nd Embodiment The schematic front view which shows the box making apparatus of 3rd Embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 7 show a first embodiment. As shown in FIGS. 1 and 2, this box making apparatus includes a printing apparatus 21 that performs flexographic printing on a corrugated cardboard cut sheet C manufactured by a corrugator (not shown) at a high speed, and a vertical print on the printed cut sheet C. A blank forming apparatus having a rotary slotter 22b for performing longitudinal cutting such as grooving for forming a blank B having an unfolded shape of a box from a cut sheet C and a rotary creaser 22a for putting a ruled line for bending in a direction; This is a flexo folder gluer in which the processing device 20 provided is arranged on the upstream side of the folding device 1. A stacking device 10 is arranged on the downstream side of the folding device 1 that forms the folding box A from the blank B supplied from the processing device 20, and the folding device 1 to the printing device 21 are disposed between the folding device 1 and the stacking device 10. the printing speed folding box a fed out at the same speed V ₁ of the in, the intermediate conveyor 2 as a low speed conveyor for decelerating the conveying speed V ₂ of the low-speed, infeed conveyor feeds the decelerated folding box a stacking apparatus 10 9 Are arranged in order.

A sheet-like cut sheet C manufactured by the corrugator is preliminarily provided with ruled lines 31a for bending in the horizontal direction. Three printing apparatuses 21 are provided for three colors, and the cut sheet C is printed 32 by each rotating plate cylinder 21a. The printing speed of the printing apparatus 21 is set to 300 to 400 m / min. The printed cut sheet C is printed by the one-dimensional CCD camera 23 that scans the printing surface arranged on the exit side in the width direction. inspected the quality, the transport conveyor 24 are fed into a rotary creaser 22a at the same speed V ₁ and the printing speed.

As shown in FIG. 3, constant spacing S ₁ is opened between each cut sheet C conveyed at a speed V ₁ by the conveyor 24. The spacing _{S 1} is the length in the conveying direction of the cut sheet C _{L C,} when the circumferential length of each plate cylinder 21a is _D, the S 1 = _{D-L C.}

The cut sheet C which has been subjected to printing 32 which is fed at a speed V ₁ with an interval S ₁ from the conveying conveyor 24 is subjected to a vertical folding ruled line 31b by a rotary creaser 22a, and then a rotary slotter. A plurality of longitudinal cutout grooves 33 for forming flaps are cut by 22b, and an adhesive seam 34 is formed on one end side by cutting to form a blank B having a developed shape of a box. Length L _B in the conveying direction of the blank B is the same as the length L _C of the cut sheet C, rotary slotter 22b may each blank B formed, the same speed V ₁ and the interval between printing speed In S _1, it is supplied to the supply end of the folding device 1.

The folding apparatus 1, each blank B supplied from the rotary slotter 22b spaced S _1, and the upper belt 1a contiguous to the discharge end from the feed end, the lower belt 1b is divided into two in the conveying direction, by 1c sandwiched, each blank B which sandwiches at intervals S _1, while conveying at the same speed V ₁ and the printing speed, folding the annular downwardly along both sides of the longitudinal direction of the ruled line 31b, blank B folded annularly The folding box A is formed by gluing both ends of each of them at the joint 34. Formed folding box A is sandwiched between the lower belt 1c of the upper belt 1a discharge end, it is discharged at a high discharge speed V ₁ to the intermediate conveyor 2 which is connected to the discharge end. Also the length L _A in the conveying direction of the folding box A, the same as the length dimension L _B of dimensions length of cut sheets C L _C and a blank B, also drain interval of folding box A, conveyance interval of the blank B It becomes the same as S _1.

As shown in FIGS. 4 and 5, the intermediate conveyor 2 is a belt conveyor in which an endless conveyor belt 2a is wound around three rollers 3a, 3b, and 3c. V ₂ is set so as to satisfy the expression (1) with respect to the discharge speed V ₁ of the folding box A discharged from the folding device 1.
_{V 1 · L A / (L} A + S 1) <V 2 <V 1 (1)
Note that the length L _A in the conveying direction of the folding box A, the plate cylinder drain interval of folded box A which is calculated from the circumference D of _{21a S 1 (= D-L} A) is previously input to the controller Yes. Therefore, since the transport distance S ₂ between folding box A of the intermediate conveyor 2 that the conveying speed V ₂ of the low speed is ensured, the distal end of the folded box A received in the intermediate conveyor 2 is box folding received earlier There is no collision with the rear end of A. In addition, since the arrival of each folding box A with an interval can be detected by the optical sensor 8 described later, the number of sheets can be accurately measured.

Specifically, the target value of the conveyance interval S ₂ (<S ₁ ) between the folding boxes A on the intermediate conveyor 2 is set, and the conveyance speed V ₂ satisfies the expression (1), and the (3 ) Is set by the following formula derived from the formula.
_{V 2 = V 1 · (L} A + S 2) / (L A + S 1) (5)
In this embodiment, a target value of the conveyance interval S ₂ is set to 250 mm, the conveying speed V ₂ which is set by equation (5) is reduced to about half the discharge velocity V ₁ in average.

  The intermediate conveyor 2 is provided with a suction device 4 on the back side of the transport surface of the transport belt 2a, and the transport belt 2a is formed of a woven fabric made of polyester fiber yarns. The bottom surface of the folding box A that is sucked and discharged from the folding device 1 is evenly adsorbed to the transport surface and is stably transported.

  The suction device 4 is provided with a plurality of suction holes 5a on the upper surface, and a plurality of suction boxes 5 extending in the transport direction are arranged in the width direction on the back side of the transport surface of the transport belt 2a and connected to a vacuum source (not shown). The suction pipe 6 sucks air from each suction box 5 and the plurality of suction boxes 5 are arranged so as to cover the entire back surface of the transport surface of the transport belt 2a.

  The woven conveyor belt 2a woven with the polyester fiber yarn has a low friction coefficient and the folding belt A of the folding box A that contacts the conveying surface when receiving the folding box A discharged from the folding device 1 at high speed. Since the front side slides on the conveyance surface, it is possible to prevent bending deformation and surface wrinkles due to the front side of the folding box A. The yarn for weaving the transport belt 2a may be formed of a polyamide fiber, a polyfluorinated ethylene fiber, or the like as long as the transport surface has a low friction coefficient.

  Further, at the entrance of the intermediate conveyor 2, a brush 7a that presses the folding box A discharged from the folding device 1 at a high speed against the transport surface is provided on the downstream side with a downward slope, and at the exit of the intermediate conveyor 2, The number of sheets is increased by the arrival of the brush 7b that is inclined downward toward the downstream side so that the folding box A that is decelerated and sent to the feeding conveyor 9 is lightly pressed against the conveying surface, and the folding box A that is sent at an interval. An optical sensor 8 is provided for measuring the above.

The infeed conveyor 9, the respective folding box A fed from the intermediate conveyor 2 is sandwiched between above belt 9a and a lower belt 9b, at the same speed as the conveying speed V ₂ of the intermediate conveyor 2, spaced apart between their mutual Feed into stacking device 10.

  As shown in FIG. 6, the stacking device 10 receives the folding box A fed from the feeding conveyor 9 with a gap therebetween by a plate-like stopper 11 arranged vertically so as to face the feeding direction. It is dropped into the hopper 12 in a posture and stacked from above. In the stacking device 10, as described above, the folding box A sent out from the folding device 1 at a high speed is sent after being decelerated by the intermediate conveyor 2 interposed between the folding device 1 and the stacking device 10, The impact at the time of being received by the stopper 11 is small, and there is no possibility that the folding box A will be damaged such as a bent end portion.

The stopper 11 is supported by two parallel guide rods 13 extending in the feeding direction so as to be able to advance and retreat in the feeding direction, and is advanced and retracted according to the length dimension L _A of the folding box A to be fed. The distance between the plate-like guides 14 suspended from the end, that is, the length dimension of the hopper 12 on which the folding boxes A are stacked is adjusted. The stopper 11 and the guide 14 that form the hopper 12 may be a plurality of vertically extending rod-like members arranged in a direction perpendicular to the feeding direction.

  This stacking device 10 is described in Patent Document 2 in which a predetermined number of folding boxes A stacked in a hopper 12 are discharged to a discharge conveyor 15 based on the number of folding boxes A measured by the optical sensor 8. From the back side of the stopper 11 into the hopper 12, two receiving shelves 16 a and 16 b that alternately advance and retract in the direction opposite to the feeding direction, and from the lower side of the discharge end of the feeding conveyor 9. Two stacking shelves 17 a and 17 b that alternately advance and retract in the feeding direction are provided on the bottom side in the hopper 12.

  The receiving shelves 16a and 16b and the stacking shelves 17a and 17b are adapted to perform an ascending / descending operation in addition to the advancing / retreating operation, and the receiving shelves 16a and 16b perform a combination operation thereof in a clockwise direction. 17b performs these combination operations counterclockwise. That is, each of the receiving shelves 16 a and 16 b performs an ascending operation at a position retracted to the back side of the stopper 11, and performs a descending operation at a position advanced into the hopper 12. Each of the stacking shelves 17 a and 17 b performs an ascending operation at a position retracted to the lower side of the discharge end of the feed conveyor 9 and performs a descending operation at a position advanced into the hopper 12. Although not shown, the receiving shelves 16a and 16b and the stacking shelves 17a and 17b are opposite to each other in the horizontal direction of the line so that they do not interfere with their counterparts when operating clockwise or counterclockwise. The cantilever is supported by the drive unit.

  Although not shown, the receiving shelves 16a and 16b and the stacking shelves 17a and 17b are formed in a comb shape in plan view. The stopper 11 is provided with a plurality of vertical slits 11a opened at the lower end, and the comb-shaped receiving shelves 16a and 16b advance and retract into the hopper 12 through the gaps between these slits 11a. The discharge conveyor 15 is a belt conveyor formed by a plurality of narrow conveyor belts 15a having gaps in the width direction, and the comb-like stacking shelves 17a and 17b are provided between the conveyor belts 15a. Advance and retreat into the gap.

  The folding boxes A, which are received by the stopper 11 and fall, are stacked on the one stacking shelf 17a that has been lifted below the discharge end of the feed conveyor 9 and then advanced into the hopper 12 by a predetermined number from above. At this time, the stacking rack 17a gradually descends as the number of stacked sheets increases so as to keep the drop of each folding box A small and constant. Further, one receiving shelf 16 a moves up into the hopper 12 after rising on the back side of the stopper 11, and stands by at a position higher than the discharge port of the feeding conveyor 9 above the hopper 12.

  As shown in FIG. 7A, when a predetermined number of folding boxes A are stacked on the stacking shelf 17a, the stacking shelf 17a descends to the conveying surface of the discharge conveyor 15 in the hopper 12, and the predetermined number of sheets. The stacked folding boxes A are transferred onto the discharge conveyor 15, and the receiving shelf 16a that has been waiting upward as shown by a two-dot chain line is also lowered in the hopper 12 to temporarily receive the falling folding boxes A. .

  As shown in FIG. 7B, when the folding boxes A stacked a predetermined number of times are transferred to the discharge conveyor 15, the lowest stacking shelf 17 a moves backward to the lower side of the feed conveyor 9, and the discharge of the feed conveyor 9 is discharged. The other stacking shelf 17b, which has risen most at the lower side of the end, moves forward into the hopper 12, and the receiving shelf 16a moves backward toward the back side of the stopper 11, and the folding box A temporarily received thereon moves forward. Is transferred onto the stacked shelf 17b. The upper surface of the stacking shelf 17b that moves forward is lower than the upper surface of the receiving shelf 16a that moves backward. Further, the other receiving shelf 16b that has been lifted on the back side of the stopper 11 moves forward in the hopper 12 and stands by at a position higher than the discharge port of the feeding conveyor 9 above the hopper 12.

  As shown in FIG. 7C, when the folding box A transferred to the discharge conveyor 15 is discharged from below the hopper 12, the stacking rack 17 b to which the folding box A is transferred from the receiving shelf 16 a becomes the hopper 12. On top of the folding box A that has been moved forward most and transferred onto the folding box A, the falling folding box A is stacked.

  Although illustration is omitted, when a predetermined number of folding boxes A are stacked on the stacking shelf 17b, the stacking shelf 17b descends to the lowest level, and the stacked folding boxes A are transferred to the discharge conveyor 15, discharged, and lowered. After the folding box A falling to 16b is temporarily received, the folding box A is transferred to the stacking shelf 17a that moves forward into the hopper 12, and the folding box A falling onto the stacking shelf 17a as shown in FIG. Stacked. In this way, the folding boxes A fed from the feed conveyor 9 are alternately stacked on the two stacking shelves 17a and 17b alternately without interruption, and then descend and discharged to the discharge conveyor 15.

In the first embodiment described above, the intermediate conveyor 2 as a slow conveyor, the folding boxes A are discharged from the folding device 1 at a high discharge speed V _1, so as to decelerate the intermediate conveyor 2 in the conveying speed V ₂ of the low-speed Although the the, because the circuits are decelerated when the folded box a is fed into the stacker 10, the infeed conveyor 9 and a low speed conveyor, the folding box a is conveyed from the intermediate conveyor 2 at a high conveying speed V ₁ , slowing the transport speed V ₂ at infeed conveyor 9 slow as slow conveyor interposed between the apparatus 10 stacking and folding apparatus 1 may be so fed to the stacking device 10.

FIG. 8 shows a second embodiment. This box making apparatus is also a flexo folder gluer in which the processing device 20 including the printing device 21, the rotary creaser 22a, and the rotary slotter 22b is arranged on the upstream side of the folding device 1, and there is no intermediate conveyor 2 and the folding device is folded. The point from which the infeed conveyor 9 is directly connected to the discharge end of the apparatus 1 and the infeed conveyor 9 is a low-speed conveyor is different from the first embodiment. Therefore, the folding box A discharged from the folding device 1 at a high discharge speed V ₁ is a low-speed transport speed V ₂ by a feed conveyor 9 having a function as a low-speed conveyor interposed between the folding device 1 and the stacking device 10. And is sent to the stacking device 10. Other configurations are the same as those of the first embodiment.

  FIG. 9 shows a third embodiment. This box making apparatus is also a flexo folder gluer in which the processing device 20 including the printing device 21, the rotary creaser 22 a and the rotary slotter 22 b is arranged on the upstream side of the folding device 1. The difference is that an entrance conveyor 18 as a conveyor is connected. Other configurations are the same as those of the first embodiment.

In this embodiment, the blank B supplied from the rotary slotter 22 b at the same speed V ₁ as the printing speed and the interval S ₁ is decelerated to a low speed by the entrance conveyor 18 and supplied to the supply end of the folding device 1. has become manner, the conveying speed V ₂ of the entrance conveyor 18 is set so as to satisfy the expression (2).
V ₁ · L _B / (L _B + S ₁ ) <V ₂ <V ₁ (2)
Note that the length dimension L _B of the conveying direction of the blank B, the discharge interval S ₁ of the blank B which is calculated from the circumference D of the plate cylinder 21a ₍₌ D-L _B) are input in advance to the controller. Therefore, the front end of the blank B received by the entrance conveyor 18 does not collide with the rear end of the previously received blank B, and the conveyance interval between the blanks B in the folding device 1 is also ensured.

Further, the folding device 1, an intermediate conveyor 2 and the infeed conveyor 9 are both set to the same conveying speed as the conveying speed V ₂ of the entrance conveyor 18, the folding box A made of a folding apparatus 1, a first embodiment as with the form, a slow conveying speed V ₂ from the conveyor 9 infeed is fed into the stacker 10 at an interval between the other.

  The entrance conveyor 18 is a belt conveyor having the same configuration as that of the intermediate conveyor 2 in the first embodiment, and the suction device 4 is provided on the back side of the transport surface of the transport belt 18a formed of a fabric, Brushes 7a and 7b for pressing the blank B against the transport surface are provided at the outlet toward the downstream side with a downward slope. Further, since the conveying belt 18a is woven with polyester fiber yarns and the conveying surface has a low coefficient of friction, when it is transferred to the inlet conveyor 18 to the blank B supplied at high speed from the rotary slotter 22b. No bending deformation or surface wrinkles due to the front-side bumps.

In the second and third embodiments described above, each folding box A made of a folding device 1 so fed into the stacker 10 at a slower transport speed V _2, small shock when it is received by the stopper 11, There is no risk of bending or other damage at the tip.

  In each of the embodiments described above, the stacking device is a type in which the folding boxes stacked in the hopper are discharged to the discharge conveyor by a predetermined number. However, the stacking device is in the hopper as described in Patent Document 1. Folding boxes once stacked from the upper side are discharged to the discharge conveyor one by one from the lower side of the hopper, the number of folded folding boxes is measured, and the predetermined number of sheets is stacked from the lower side on the downstream side of the discharge conveyor. It can also be a type.

  In each of the embodiments described above, the folding box is made of corrugated cardboard, and the box making apparatus is a flexo folder gluer in which a processing apparatus including a printing apparatus, a rotary creaser, and a rotary slotter is arranged on the upstream side of the folding apparatus. However, the folding box can also be made of cardboard. Further, the box making apparatus can be a folder gluer in which another processing apparatus is arranged on the upstream side, or a folder gluer in which only a blank supply apparatus is provided on the upstream side of the folding apparatus. Furthermore, there is no processing device on the upstream side, a blank that has been printed and punched into a predetermined box unfolded shape is supplied to the folding device, and a one-touch box that forms a folding box in which the assembly of the bottom of the box is a one-touch type It can also be a forming gluer.

A Folding box B Blank C Cut sheet 1 Folding device 1a Upper belt 1b, 1c Lower belt 2 Intermediate conveyor 2a Conveying belt 3a, 3b, 3c Roller 4 Suction device 5 Suction box 5a Suction hole 6 Suction piping 7a, 7b Brush 8 Optical Sensor 9 Feed conveyor 9a Upper belt 9b Lower belt 10 Stacking device 11 Stopper 11a Slit 12 Hopper 13 Guide rod 14 Guide 15 Discharge conveyor 15a Conveying belts 16a and 16b Receiving shelves 17a and 17b Stacking shelves 18 Inlet conveyor 18a Conveying belt 20 Processing device 21 Printing device 21a Plate cylinder 22a Rotary creaser 22b Rotary slotter 23 CCD camera 24 Conveyor 31a, 31b Ruled line 32 Printing 33 Notch groove 34 Joint allowance

Claims (5)

A stacking device is arranged on the downstream side of the folding device, and the folding device is folded in an annular shape while conveying a cardboard or a cardboard blank in a developed shape of a box that is sequentially supplied at a predetermined interval, and both ends thereof To form a folding box for the box, and the folding box sent out from the folding device at an interval is sent to the downstream stacking device, and the folding device is fed in the feeding direction by the stacking device. In a box making apparatus that is received by a stopper disposed oppositely and stacked downward, a transport speed V _{2 that} is lower than the transport speed V ₁ in the folding apparatus is between the folding apparatus and the stacking apparatus. in is interposed a slow conveyor to be driven, is fed a length of conveying direction of the folded box L _a, from the folding device The spacing between that folded box when the S _1, the conveying speed V ₂ of the low speed conveyor, set to satisfy the following equation (1), is decelerated with the conveyance speed V ₂ at the low speed conveyor A box making apparatus characterized in that a folding box is received by a stopper of the stacking apparatus.
_{V 1 · L A / (L} A + S 1) <V 2 <V 1 (1) A stacking device is arranged on the downstream side of the folding device, and the folding device is folded in an annular shape while conveying a cardboard or a cardboard blank in a developed shape of a box that is sequentially supplied at a predetermined interval, and both ends thereof To form a folding box for the box, and the folding box sent out from the folding device at an interval is sent to the downstream stacking device, and the folding device is fed in the feeding direction by the stacking device. In a box making apparatus that is received by a stopper disposed oppositely and stacked downward, it is lower than the blank speed V ₁ that is supplied to the inlet of the folding apparatus with the predetermined interval S ₁ being opened. connect the low speed conveyor which is driven at the conveying speed V _2, the length of the conveying direction of the blank is taken as L _B, the low-speed conveyor A conveying speed V ₂ of that set to satisfy the following formula (2), a folding box which is decelerated with the conveyance speed V ₂ at the low speed conveyor, and to receive by the stopper of the stacking device A box making device.
V ₁ · L _B / (L _B + S ₁ ) <V ₂ <V ₁ (2)   The box making apparatus according to claim 1 or 2, wherein the low-speed conveyor or a conveyor connected to an upstream side of the low-speed conveyor is a belt conveyor having a conveyance surface of a conveyance belt having a low friction coefficient.   The belt conveyor is provided with a suction device on the back side of the conveyor belt, the conveyor belt is formed of a woven fabric, and air is sucked by the suction device through a gap between the weaves of the woven fabric. 3. The box making apparatus according to 3.   5. The box making apparatus according to claim 4, wherein the woven fabric conveyor belt is woven with yarn having a low coefficient of friction on the surface.

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