JPH0857987A - Corrugated fiberboard sheet supplying apparatus - Google Patents

Abstract

PURPOSE: To effectively separate corrugated fiberboard sheets one by one and to supply to drop them at a high speed by prechuting the sheet of foremost side to a gap between a bearing wall and a supply conveyor to be stopped, and forcibly dropping it when its stop is released. CONSTITUTION: A corrugated fiberboard sheet receiving wall 14 is separated by a size of 1.5 times as large as the thickness of one sheet from a supply conveyor 11 to the front surface of the conveyor 11 in a conveying direction, and a gate shape frame 14a is stood. A plurality of roll groups 14b so arranged as to be on one row state in vertical direction rotatably with the frame 14a are vertically received with the sheet W1 of the foremost side displaced from the conveyor 11. Accordingly, a corrugated fiberboard box W2 has small stationary frictional force of the wall 14, and dropped in a gap to the conveyor 11 by own weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard sheet (in the present specification, a corrugated cardboard sheet means a front surface portion, both side surface portions, a rear surface portion, and four upper and lower lid pieces above and below these four surface portions, respectively). Punched from corrugated cardboard paper into a developed shape with two edges and glued the edges together, and when opened, it can be a rectangular tube shape with four lid pieces open and closed. Say ] Can be securely separated one by one and dropped at a high speed, and even if the size of the corrugated cardboard sheet changes, the size can be changed and automatically adjusted to the loading position corresponding to the sandwich conveyor of the box making machine. Also, the corrugated cardboard sheet has a minimum width of 4
The present invention relates to a corrugated cardboard sheet feeding device that can respond to a size change even when the maximum width dimension is 00 mm and is as large as 1000 mm, and is extremely versatile with respect to the size.

[0002]

2. Description of the Related Art A general basic construction of a box making apparatus has a sandwich conveyor for sandwiching and carrying corrugated cardboard boxes, and feeding corrugated cardboard sheets stacked in a stacking section to a predetermined position to form a rectangular tubular shape. To the bottom, further fold the bottom rear lid piece to the bottom, then fold the bottom front lid piece to the bottom, fold the bottom lid pieces on both sides to the bottom, and then either stick the adhesive tape or
The front and rear lower lid pieces are bonded to the lower lid pieces on both sides by hot melt sprayed on the lower surfaces of the front and rear lower lid pieces.

Inventions related to the conventional box making apparatus are disclosed in JP-A-5-96662, JP-A-5-96664 and JP-A-5-96667. In particular, JP-A-5-9666
No. 2 relates to an aligning / supplying device for corrugated board sheets for box-making, which collects corrugated board sheets on a pair of chain conveyors and drops and supplies them one by one to a box-making apparatus that assembles corrugated board sheets into a box shape. It is designed to be driven intermittently separately from the chain conveyor.A pair of left and right vacuum pads is provided in front of the chain conveyor in the transport direction, and a link mechanism that supports the vacuum pads and draws them from the suction position to the position where they naturally fall. , And a negative pressure detection sensor for detecting the negative pressure of each vacuum pad to detect that the vacuum pad has adsorbed and supported the corrugated cardboard sheet. When a supply signal is input, the pair of left and right chain conveyors conveys a group of corrugated cardboard sheets accumulated on the chain conveyor and brings the lower part of the frontmost corrugated cardboard into contact with a vacuum pad. Corresponding chain conveyors are driven to drive until the negative pressure detection sensor detects that the pad has adsorbed and supported the corrugated cardboard sheet.The pair of left and right vacuum pads adsorb the lower part of the corrugated cardboard sheet and move it to the lower front. The cardboard sheet is pulled out to release the close contact with the second corrugated board sheet, positioned on the drop chute, the suction is released, and the cardboard sheet is naturally dropped through the drop chute.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
No. 6662, an aligning / feeding device for a corrugated board sheet for box making is premised on that a gap is formed between the left and right vacuum pads returned to the take-out position and the frontmost corrugated board sheet. When the supply signal is input, a pair of left and right chain conveyors individually drive and drive the group of corrugated cardboard sheets accumulated on the chain conveyor, and the front corrugated cardboard sheet is not guaranteed to have a certain size. The lower part of the is contacted with the vacuum pad. That is, it takes a lot of time until the frontmost corrugated cardboard sheet comes into contact with the suction pad by suction after the supply signal is input by driving the chain conveyor to drive and picking up the position, and it varies. In particular, when a large gap is created when placed between corrugated cardboard sheets of a group of corrugated cardboard sheets stacked on the chain conveyor, the traveling speed of the chain conveyor is extremely slow, and the operating time during this period is This is a large proportion of the supply time of the sheets, which is a cause of the increase in the supply time per corrugated board sheet.
In addition, the pair of left and right vacuum pads adsorb the lower part of the corrugated cardboard sheet and pull it downward and forward to release the suction, and the corrugated cardboard sheet naturally falls through the drop chute. Is a cause of increasing the supply time. In the practical machine, the upper limit of the supply capacity of the aligning / supplying device for corrugated board sheet for box making according to Japanese Patent Laid-Open No. 5-96662 is about 15 sheets per minute.

Further, in the above-mentioned corrugated cardboard sheet aligning / feeding device according to Japanese Patent Laid-Open No. 5-96662, a pair of left and right chain conveyors can be moved toward and away from each other with respect to the center of the interval, and the size of the corrugated cardboard sheet can be increased. If the maximum width of the corrugated board sheet is 1000 mm, the apparatus frame has a uniform width of about 1400 mm from the top to the bottom, which is an extremely large machine.

Further, in the aligning and feeding apparatus for corrugated cardboard sheets for box making according to the above-mentioned Japanese Patent Laid-Open No. 5-96662, the apparatus is complicated and large in size, such as a double table structure for the frame of the sandwich conveyor of the box making apparatus. (It is not described in the specification that the double table structure is used). That is, in order to make the box-making size versatile, the pair of left and right chain conveyors can be approached and separated based on the center of the interval, and the sandwich conveyor of the box-making device can be approached and separated based on the center of the interval. . Therefore, although not described in the description, the center of the interval serving as the position reference of the sandwich conveyor is adjusted to be a distance of half the width of the cardboard box from the center of the interval serving as the position reference of the pair of left and right chain conveyors. It is necessary that the pair of left and right chain conveyors can be approached and separated based on the center of the interval, which means that the frame of the sandwich conveyor of the box making device must have a double table structure. Also for the adjustment of peripheral devices attached to the sandwich conveyor, it is necessary to be adjustable so that the distance is half the width of the cardboard box from the center, which is the position reference of the pair of left and right chain conveyors. It leads to complication.

The present invention has been devised in view of the above-mentioned points, and can reliably separate the corrugated board sheets one by one and drop and supply them at a high speed. Further, even if the size of the corrugated board box is changed, the size of the corrugated board is dropped. It is possible to automatically adjust to the loading position corresponding to the position, and it does not lead to complication and size increase of the device such as the double table structure of the frame of the sandwich conveyor of the box making device. When the width is 400 mm, the width is small so that it is almost the same as the width of the plane area of the box making machine, and the maximum width is 1000 m
When the size is increased to m, the size can be changed without affecting the flat area of the box making device, and the versatility with respect to the size is extremely large, and the box making device can be a small frame. Is intended.

[0008]

SUMMARY OF THE INVENTION The first invention is, square in the lower lid piece open cardboard sheet W1 to rectangular tube W2 _a ^',
W2 _b ^', W2 _^c', to Seihako device as cardboard boxes W2 by folding the bottom of the W2 _d ^', which is configured to drop feed one by one by integrating make a cardboard sheet W1 on the feed conveyor In the corrugated board sheet supply device, the supply conveyor 11 is configured to travel on a conveyor traveling body that constantly travels, and can convey the corrugated sheet W1 by slidingly contacting the lower end surface of the corrugated sheet W1 with the conveyor traveling body. A corrugated cardboard sheet receiving wall 14 for receiving the frontmost corrugated cardboard sheet W1 which is detached from the supply conveyor 11 and which is erected on the front surface of the downstream end of the conveyer 11 so as to drop one corrugated cardboard sheet; Supply conveyor 1
1. A corrugated board sheet pushing means 1 capable of pushing the corrugated board sheets W1 stacked on the sheet 1 and appropriately releasing the pushing.
5 and a height that does not interfere with the step of opening the corrugated cardboard sheet W1 which is the first corrugated cardboard sheet W1 that is dropped from the supply conveyor 11 and falls into the gap between the corrugated cardboard sheet receiving wall 14 to the box shape. The stop device 16 to be stopped in contact with the front end of the corrugated cardboard sheet W1 when the fall stop device 16 releases the stop of the fall, or a contactless endless belt that is driven to travel or is contacted with the corrugated cardboard. A corrugated board sheet lowering device 17 for dropping and supplying a corrugated board sheet W1 by pulling down the upper end of the sheet with a claw that is moved downward.

According to the second invention of the present application, a box-shaped cardboard box W2 is sandwiched and conveyed by a sandwich conveyor which automatically adjusts the sandwiching size of the conveyor sandwiching space to the width size of the cardboard box W2 with the center of the interval as a reference. lower lid piece _{^{W2 a ', W2 b',}} W2 c ', W2 d' by folding the bottom of the Seihako device as cardboard boxes W2, rear face portion said sandwich when the Hirakihako cardboard sheet to rectangular tube Corresponding to the cardboard box sandwich space of the conveyor,
In a corrugated board sheet feeding device configured to stand up and stack corrugated board sheets W1 on the supply conveyor 11 and drop-feed them one by one, the supply conveyor 11 mounts corrugated board sheets having a minimum width for mounting corrugated board. The conveyor traveling bodies 11b, 11b are traveled in correspondence with the size which can be placed, and the conveyor traveling bodies 11b, 11b are in sliding contact with the lower end surface of the corrugated board sheet W1 to convey the corrugated board sheet W1. It has an auxiliary table 12a projecting to the side of the supply conveyor 11 in association with the size of the corrugated cardboard sheets W1 accumulated on the supply conveyor 11, and by the auxiliary table 12a to the side of the supply conveyor 11 of the corrugated board sheets W1. An auxiliary table device 12 on which the lower end of the projecting end can be placed, and a corrugated cardboard sheet accumulated on the supply conveyor 11. For aligning the corrugated cardboard sheet edges, which has a guide bar 13a for aligning corrugated cardboard sheets which extends parallel to the conveyor feeding direction which moves sideways of the feed conveyor 11 on the opposite side of the auxiliary table in association with the size of the auxiliary table W1. The guide bar 13a abuts against the side edge of the corrugated board box W2 and aligns the edges to form a corrugated board box W2 on the rear surface of the corrugated board sheet.
A corrugated cardboard sheet is provided between the guide bar device 13 that makes the rear surface part of the sandwich conveyor correspond to the cardboard box sandwiching space of the sandwich conveyor, and the supply conveyor 11 on the front of the transport downstream end of the supply conveyor 11. The supply conveyor 11 is installed upright with a gap that allows it to be dropped.
A corrugated cardboard sheet receiving wall 14 that receives the frontmost corrugated cardboard sheet W1 that is disengaged from the corrugated cardboard sheet, and a corrugated cardboard sheet post-pressing means 15 that can push the corrugated cardboard sheet W1 stacked on the supply conveyor 11 and release the boosting appropriately.
The frontmost corrugated cardboard sheet W, which comes off the supply conveyor 11 and falls into the gap between the corrugated cardboard sheet receiving wall 14,
Drop stopping device 16 for stopping the corrugated cardboard sheet that has been dropped one by one and supplied at a height that does not interfere with the process of opening it in a box shape 16
Then, when the fall stop device 16 releases the fall stop, the roller or the endless belt that is rotationally driven is brought into contact with the frontmost corrugated cardboard sheet W1 or the upper end of the corrugated cardboard sheet is moved down. There is provided a corrugated board sheet feeding device comprising: a corrugated board sheet lowering device 17 for dropping and supplying the corrugated board sheet W1 by pulling it down with a claw.

[0010]

The first and second inventions of the present application are the supply conveyor 11
With respect to the corrugated cardboard sheets W1 stacked on the supply conveyor 11, a corrugated cardboard sheet receiving wall 14 provided upright in front of the supply conveyor 11 and a proper gap between the corrugated cardboard sheet W1 and the supply conveyor 11 may be provided. Cardboard sheet pushing means 15
The cardboard sheet W1 is sandwiched between the cardboard sheet W1 and the supply conveyor 11 and is constantly run to slide the lower end of the corrugated cardboard sheet W1 to give a conveying force to collect the corrugated cardboard sheets W1 without any gap. When an appropriate drop stop device 16 stops the drop in a state where it falls in the gap between the sheet receiving wall 14 and the drop stop, and the drop stop is released, the corrugated cardboard sheet W1 is moved to the upstream end of the sandwich conveyor 1 by the appropriate corrugated cardboard sheet lowering device 17. It can be supplied by giving a forceful fall force.

More specifically, the first invention of the present application has the following effects. The corrugated board sheet pushing means 15 is released, a large number of corrugated board sheets W1 are stacked on the supply conveyor 11, and the corrugated board sheet pushing means 15 pushes the corrugated board sheets back. Then, the frontmost corrugated cardboard sheet is removed from the supply conveyor 11, and is received by the roller group 14b of the corrugated cardboard sheet receiving wall 14 or the vertical feed belt of the belt type vertical feeding device.
4 is dropped into the space between the cardboard 4 and the drop stop device 16 and is dropped to a height that does not interfere with the step of opening the corrugated cardboard sheet which has been dropped and supplied first. When the device is operated, when the fall stop device 16 releases the fall stop of the frontmost corrugated board sheet, the corrugated board sheet lowering device 17 causes the corrugated board sheet W to fall.
1 is forcibly dropped and supplied. Then, the corrugated board sheet lowering device 17 returns to the original position and the fall stop device 16 returns to a state in which the corrugated board sheet W1 can be stopped to fall. Then, the supply conveyor 11 is constantly driven to move, and the conveyor traveling body slides on the lower end surface of the corrugated board sheet W1,
Corrugated board sheet W by the corrugated board sheet pushing means 15
Since the corrugated cardboard sheets W1 are vertically stacked without any gap in combination with the boosting of No. 1, when the corrugated cardboard sheet lowering device 17 forcibly drops and supplies one corrugated cardboard sheet, the next corrugated cardboard sheet is fed. 11 is surely dropped in the gap between the cardboard sheet receiving wall 14.

The second invention of the present application has the following effects. First, the auxiliary table and the corrugated paperboard sheet edge aligning guide bar 13a are adjusted and moved in accordance with the size of the corrugated board box W2. The corrugated board sheet pushing means 15 is released from the pushing position, and a large number of corrugated board sheets W1 are brought into contact with the corrugated board sheet edge aligning guide bar 13a to align the edges and stacked on the supply conveyor 11. Then, the rear surface portion of the corrugated board sheet W1 when the corrugated board box W2 is boxed corresponds to the corrugated board box sandwiching space of the sandwich conveyor. The auxiliary table is
When the corrugated cardboard sheet has a minimum width, for example, 400 mm, the corrugated cardboard sheet W1 that slightly protrudes from the side of the conveyor and slightly protrudes from the supply conveyor 11 supports the lower end on one side,
Further, when the corrugated board sheet has the maximum width, for example, 1000 mm, the corrugated board sheet W1 is greatly extended to the side of the conveyor to support the lower end on one side of the corrugated board sheet W1 which is largely protruded from the supply conveyor 11 to the side. The corrugated board sheet W1 is pushed by the corrugated board sheet pushing means 15. Then, the foremost corrugated cardboard sheet is removed from the supply conveyor 11 and is received by the roller group 14b of the corrugated cardboard sheet receiving wall 14 or the vertical feed belt of the belt type vertical feeding device, and the corrugated sheet receiving wall 14 is received. The corrugated sheet W1 dropped into the gap and dropped by the drop stopping device 16 is stopped to a height not interfering with the step of opening the corrugated cardboard sheet W1 into the box shape. When the apparatus is operated, when the fall stop device 16 releases the fall stop of the frontmost corrugated board sheet W1, the corrugated board sheet lowering device 17 forcibly drops and supplies the corrugated board sheet W1. Then, the corrugated board sheet lowering device 17 returns to the original position and the fall stop device 16 returns to a state in which the corrugated board sheet W1 can be stopped to fall. And supply conveyor 1
1, the conveyor traveling body is slidably contacted with the lower end surface of the corrugated cardboard sheet W1 so that the corrugated cardboard sheet pushing means 15 is provided.
Since the corrugated cardboard sheets W1 are vertically stacked without any gap in combination with the pushing of the corrugated cardboard sheets W1 by the above, when the corrugated cardboard sheet lowering device 17 forcibly drops and supplies one corrugated cardboard sheet, Is surely dropped in the gap between the supply conveyor 11 and the cardboard sheet receiving wall 14.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the box-making and feeding device shown in FIGS. 1 to 9 will be described. Through this description, the configuration of the corrugated board sheet feeding device according to the first embodiment of the present invention will be described. In this box making device, the rear surface portion W2 _C of the rear surface portion of the corrugated cardboard sheets W1 accumulated on the supply conveyor 11 of the corrugated board sheet supply device 10 when opened in a rectangular tube shape is used as a space for sandwiching the corrugated board box of the sandwich conveyor 1. To correspond
It is dropped and supplied onto the receiving conveyor 50 of the box opening pre-feeding device 20 and the rear surface W of the cardboard box W2 is sucked by the vacuum pad 21.
2 _c is suction-held and moved in the direction away from the sandwich conveyor 1 to the upstream side by the length dimension S of the cardboard box W2, and at that time, the lower front lid piece W2 _d ^′ of the cardboard box W2 is pressed against the receiving conveyor 50. Corrugated cardboard box W
2 is given a force to open in a rectangular tube shape, and the front part W2 _d of the corrugated board box W2 is opened in a rectangular tube shape so as to correspond to the sandwiching space of the corrugated board box of the sandwich conveyor 1, and the bottom folding plate 23a becomes horizontal to the front side. and swings the bottom folding the bottom of the lower rear lid piece W2 _C ^'cardboard box W2 in a box-type half-closed state as, cardboard boxes W to advance the vacuum pad 21 again
2 is fed forward and sandwiched between the sandwich conveyors 1 and conveyed, and in the process of conveyance, the lower front lid piece W2 _d of the cardboard box W2
^'Lower lid piece W2 _a bilateral after folding the bottom of ^the', W2 _b ^'
Bottom folding and lower lid piece W2 _C before and after the hot-melt was sprayed in the required step in ^', W2 ^_d' on both sides of the lower lid piece W in
2 _a ^', W2 _^b' is configured to adhere the.

As shown in FIGS. 5 and 7, the sandwich conveyor 1 comprises a pair of left and right conveyor frames 1 having a required shape.
a pair of left and right endless conveyor belts 1c and 1d are wound around toothed pulleys 1b and 1b for timing belts provided on the respective upper portions of a and 1a so as to be aligned with the vertical axis,
Toothed pulley 1 for timing belt on both downstream side
The motors 1e and 1f attached to the lower part of the conveyor frame 1a are connected to the motors 1b and 1b via a connecting shaft.
By constantly driving e and 1f, a corrugated cardboard box W2 opened in a box shape on the upstream side of the conveyor is sandwiched between a pair of left and right conveyor belts 1c and 1d for conveyance. Particularly, in this sandwich conveyor 1, the speed of the motor 1e on the right side in the conveying direction is set to be slightly higher than the speed of the motor 1f on the left side.
When c and 1d sandwich the cardboard box W2 and convey it,
The corrugated cardboard box W2 is prevented from being restored to the parallelogram in the direction in which the corrugated cardboard box W2 is flatly folded, and the pinching force against the corrugated cardboard box W2 is ensured so that the corrugated cardboard box W2 can be effectively conveyed. In particular, in this sandwich conveyor 1, a pair of left and right conveyor frames 1a, 1a are guides 1g, 1g.
And the right conveyor frame 1a is screwed into the right screw of the screw shaft 1h that cannot move in the axial direction, and the left conveyor frame 1a is screwed into the left screw of the screw shaft 1h. , And the motor 1i is connected to the screw shaft 1h, and the cardboard box W2 is connected to a data input device (not shown).
Enter the length, width and height of the
Are driven according to the width size to rotate the screw shaft 1i, and the pair of left and right conveyor frames 1a, 1a approach or separate from each other based on the center of the interval, so that the conveyor sandwiching space becomes the width size of the cardboard box W2. It is automatically adjusted.

As shown in FIGS. 5 and 7, between the pair of left and right conveyor frames 1a, 1a of the sandwich conveyor 1, a pair of left and right rail guides 40, 40 are provided. The rail guides 40, 40 have an upper surface 40a on the upstream side.
Has a shape that linearly inclines and descends toward the upstream end or descends in a quarter arc shape, and inserts the lower front lid piece W2 _d ^′ of the corrugated cardboard box W2 that is sandwiched by the sandwich conveyor 1. It folds bottom to guide placement, and subsequently serves to guide placement of the bottom-folded lower rear lid piece W2 _c ^′ of the corrugated cardboard box W2. The rail guides 40, 40
Are supported by support members 40b and 40b which are protruded inward from the conveyor frames 1a and 1a on the respective sides and then stood up, and both sides of the corrugated board box W2 when the corrugated board box W2 is sandwiched by the sandwich conveyor 1. The lower lid pieces W2 _a ^′ and W2 _b ^′ stand up inwardly and approach / separate integrally with the conveyor frames 1a, 1a on each side.

As shown in FIGS. 1 and 4, the hot melt injection nozzles 41, 41 are several cm downstream from the position where the lower front lid piece W2 _d ^' of the corrugated cardboard box W2 is bottom-folded by the rail guides 40, 40. Side position conveyor frame 1a,
The hot melt applicator (not shown), which is installed outside the apparatus, is connected between 1a by a flexible hose (not shown). And 3 to 4 mm downstream of the hot melt injection nozzles 41, 41.
After a first sensor (not shown) installed at a distant position detects the passage of the front end of the corrugated cardboard box W2, the hot melt injection nozzle 41, 41 sprays hot melt and applies hot melt to two places on the left and right of the lower front lid piece W2 _d ^' of the corrugated cardboard box W2, and subsequently is installed on the required upstream side of the hot melt spray nozzles 41, 41. When a second sensor (not shown) detects the passage of the rear end of the corrugated board box W2 and a required short time of less than one second elapses, the hot melt injection nozzles 41, 41 inject hot melt to cause the rear part of the corrugated board box W2 to fall behind. It is adapted to apply the hot melt on the lower surface of the right and left two places of the side lid piece W2 _C ^'.

Then, as shown in FIGS. 1 and 4, in order to linearly move the corrugated cardboard box W2 moving to the downstream side of the sandwich conveyor 1 to the downstream side of the sandwich conveyor 1, the left and right conveyors of the sandwich conveyor 1 are moved. A pair of left and right guide members 42, 42, which are cantilevered by the frames 1a, 1a and extend to the downstream side of the conveyor, closely guide both side surfaces of the corrugated cardboard box W2, and the center between the guide members 42, 42 on the downstream side of the sandwich conveyor 1. consistent with the line two, three mm thickness on the order of a plate corrugated box mounting plate 43 formed by erecting the bottom fold has been that the front and rear of the lower lid piece W2 _c cardboard box W2 ^', W2 ^_d' Is mounted, and the height is automatically adjusted by the motor 44 according to the size input of the cardboard box W2. W2 of stand up open four upper lid piece _{W2 a ", W2 b",} W2 C ", W2 d"
It is designed to guide you lightly.

Then, as shown in FIGS. 1, 5 and 8, the guide member 4 is provided on the downstream side of the sandwich conveyor 1.
Lower lid pieces W2 _a ^′ , W on both sides of the corrugated cardboard box W2 constrained from being biased in the vertical direction and the horizontal direction by the cardboard box mounting plates 43 and the floating prevention guides 45.
2 _b ^' is folded bottom and front and rear lower lid pieces W2 _C ^' , W2 _d
^'Both sides of the lower lid piece W2 ^_a', in order to adhere with a hot-melt and W2 _b ^', and the lid piece bottom folding device 46 and the hot-melt adhesive part pressing device 47 is provided. The lid piece bottom folding device 46 is a lid piece that is horizontally supported by the upper ends of a pair of swing arms 46b, 46b that swing from the state opened on both sides in the conveyor transport direction by the air cylinder 46a to the center of the gap to close. The bottom folding plates 46c, 46c are fixedly installed, and when a third sensor (not shown) detects the passage of the rear end of the corrugated board box W2 from the sandwich conveyor 1, the air cylinder 46a operates and the lid bottom folding plates 46c, 46c.
There lower lid piece W2 _a on both sides of the cardboard box W2 ^', W2 ^_b'
Lower lid piece W2 _a closed from both sides outside the ^', W2 ^_b' is adapted to perform folding bottom. The hot-melt adhesive section pressing device 47 comprises pressing heads 47c and 47d fixed to the lower ends of piston rods that vertically vertically stroke a pair of air cylinders 47a and 47b. 42, the cardboard box mounting plate 43, and the rising prevention guide 45 restrain the deviation in the up-down direction and the left-right direction from the cardboard box W2.
Lower lid piece on both sides of the W2 _a ^', W2 _^b' lid piece bottom folding plate 4
The air cylinders 47a and 47b are extended to operate the pressing heads 47c and 47 in a state where the bottoms are folded by 6c and 46c.
d is lower lid pieces W2 _C ^' , W2 _d before and after the cardboard box W2
^'Said cover piece bottom folding plate 46c of the presses the upper surface portion corresponding to 46c, the front and rear of the lower lid piece W2 ^_C', W2 before and after the lower lid piece by the deposited hot-melt the lower surface of the _d ^'W2 _C
^" , W2 _d ^" and the lower lid pieces W2 _a ^" , W2 _b ^" on both sides are bonded, and after about one second, the air cylinder 47a,
The pressing heads 47c and 47d are returned to the ascending order by the reduction operation of 47b. Lid bottom folding plate 46c,
46c is then adapted to return to the open position. When the length, width, and height of the cardboard box W2 is input to a data input device (not shown), the air cylinder 47b on the downstream side drives the motor 47e to drive the screw shaft 47f according to the length size. It has the versatility of being moved by rotation and automatically adjusted to a position corresponding to the length size of the corrugated board box W2, and capable of processing corrugated board boxes W2 of various sizes.

As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 6 and FIG. 9 (b), the corrugated board sheet supply device 10 includes a supply conveyor 11 and a corrugated board box extension end auxiliary mounting table device 12.
And a guide bar device 13 for positioning the right end of the cardboard box, a cardboard sheet receiving wall 14, and a cardboard sheet pushing means 15.
And a drop stop device 16 and a corrugated board sheet lowering device 17 as main elements. The corrugated board sheet W1 is brought into contact with the guide bar device 13 for positioning the right end of the corrugated board box,
Moreover, the rear surface portion W2 _c when the bag is dropped and supplied onto the supply conveyor 11 and opened into a rectangular tube shape, the sandwich conveyor 1 is provided.
The corrugated paperboard sheet W1 is placed upright so as to correspond to the cardboard box sandwiching space, and the corrugated paperboard box W2 can be dropped and supplied from directly above to the upstream end of the sandwich conveyor 1.

The supply conveyor 11 includes a pair of left and right narrow timing belts or a conveyor running body 11b such as a chain wound endlessly around a motor 11a as a drive source.
The upper winding portion of 11b is adapted to always slide on the horizontal plate 11c in the direction of the corrugated board sheet receiving wall 14, and the corrugated board sheets W1 are stacked so that the stacking direction is in the horizontal direction parallel to the transport direction. Therefore, the corrugated cardboard sheet W1 that is the first in the transport direction and deviates from the conveyor traveling bodies 11b and 11b can be transported so as to be positioned immediately above the upstream end of the sandwich conveyor 1. The pair of left and right conveyor traveling bodies 11b, 11b are fixed at intervals allowing the lower ends of both sides of the corrugated cardboard sheet W1 having the smallest width to be mounted and the corrugated cardboard sheet W1 having the smallest width is mounted thereon. The width center of the rear surface portion W2 _C of the rear surface portion of W1 when opened in the corrugated cardboard box is aligned with the center of the interval of the corrugated cardboard box sandwiching space of the sandwich conveyor 1 regardless of the size change of the corrugated cardboard sheet.
Therefore, regardless of the size change of the corrugated board sheet, if the width center of the rear surface portion W2 _C of the rear surface portion of the corrugated board sheet W1 when opened in the corrugated board box is always aligned with a fixed position on the supply conveyor 11, Seat W1
When the cardboard is dropped and supplied and opened into a rectangular tube shape to become the corrugated board box W2, the width center of the rear surface portion of the corrugated board box W2 always coincides with the center of the interval of the corrugated board box sandwiching space of the sandwich conveyor 1.

The cardboard box overhanging auxiliary loading table device 12 includes a horizontal plate 11c on the left side in the carrying direction and a central horizontal plate 1.
The auxiliary table 1 on the left side in the transport direction of the supply conveyor 11 supported by the protruding end of the horizontal rod 12b guided by 1d.
The cardboard box W having a data input device (not shown) having 2a
Enter the length, width, and height of 2 and the motor 1
The auxiliary table 12a is moved so that the stroke screw shaft 12d is driven by 2c to load the lower end of the corrugated board box W2 on the left side in the transport direction. Therefore, the table device 12 includes the supply conveyor 11
The cardboard box W2 having a size far exceeding the standard size is placed on the left end side lower end in the transport direction so that the weight of the cardboard box W2 is applied to the supply conveyor 11. I am assisting. The drop guide 12e hangs down from the front end of the auxiliary table 12a.

The guide bar device 13 for positioning the right end of the cardboard box includes a horizontal plate 11c on the right side in the carrying direction and a central horizontal plate 1.
It has a guide bar 13a supported by a movable member 13c supported by a projecting end of a horizontal rod 13b guided by 1d, and when each size of a cardboard box W2 is input to a data input device (not shown), a motor 13d is driven. Then, the stroke screw shaft 13e is screwed to move and adjust the guide bar 13a to a required position corresponding to the width dimension of the cardboard box W2. The guide bar 13a can align the right end of the corrugated board box W2 in the transport direction, and the rear surface portion W of the corrugated board box W2.
2 _c ′ serves to position the right end of the cardboard box so as to correspond to the space between the sandwich conveyor 1 where the cardboard box is sandwiched.

The corrugated cardboard sheet receiving wall 14 is separated from the supply conveyor 11 by a dimension of 1.5 times the thickness of one corrugated cardboard sheet in front of the supply conveyor 11 in the conveying direction, and has a gate-shaped frame 14a. The frame 14a is installed upright.
A plurality of roller groups 14b arranged in a row in the vertical direction, which are rotatably attached to the supply conveyor 1,
The frontmost corrugated cardboard sheet W1 that is out of position 1 is vertically received. Therefore, the cardboard box W2
The static frictional force with the corrugated cardboard sheet receiving wall 14 is small, and the corrugated cardboard sheet receiving wall 14 is designed to fall into the supply conveyor 11 by its own weight.

The corrugated cardboard sheet pushing means 15 includes a slide 15a which is engaged with and guided by the auxiliary table 12a of the corrugated cardboard box extension end auxiliary mounting table device 12 in the conveying direction of the supply conveyor 11, and a lower end of the slide 15a. The swing bar 15b is pivotally attached and has a bifurcated shape from the middle.
And a pressing ring 15c fixed to the swing bar 15b so that its position can be adjusted, and attached to the end of the auxiliary table 12a in the conveyor conveying direction, and the spring spring feeding end is connected to the slide 15a. Mainspring spring 15 that biases the end with the required force
It consists of d and. The corrugated cardboard sheet pushing means 15 swings the swing bar 15b away from the top of the supply conveyor 11 so that the corrugated board sheet W is placed on the supply conveyor 11.
1, the swing bar 15b is manually moved to the rear of the rearmost corrugated cardboard box W2, and then the supply conveyor 1
1 and swings the pressing ring 15c to the rearmost cardboard box W
2 is brought into contact with the mainspring spring 15d, the spring 15d slides
Since a is urged toward the end of the conveyor in the conveying direction with a required force, the pressing ring 15c pushes the rearmost corrugated cardboard box W2.

As shown in FIG. 1, the fall stop device 16 is
Air cylinder device 16a and the air cylinder device 16a
It is composed of a stopper 16b which is directly moved by. The drop stop device 16 advances the stopper 16b before the frontmost corrugated cardboard sheet W1 that comes off the supply conveyor 11 falls into the gap between the corrugated cardboard sheet receiving wall 14 and the frontmost corrugated cardboard sheet W1 that falls. The stopper 16b is retracted, and the stopper 16b is retracted and dropped into the corrugated cardboard box W2. 16b is retracted to allow the cardboard box W2 to fall. Therefore, the stopper 16b
The height for receiving the lower end of the corrugated cardboard box W2 is such that it does not interfere with the corrugated cardboard box W2 dropped first and the box opening pre-feed device 20 of the corrugated cardboard box W2.

The corrugated board sheet lowering device 17 is provided in a pair and integrally so as to sandwich the gate-shaped frame 14a, and a swing lever 17b pivotally attached to the gate-shaped frame 14a by a pin shaft 17a, and a swing lever 17b. An air cylinder device 17c provided by connecting the upper end of the moving lever 17b and the frame 14a, and a little at the lower end of the cardboard box W2 pivotally supported by the lower end of the swing lever 17a and stopped from falling by the stopper 16b. It is composed of a rubber roll 17d facing away from each other and a motor 17e that constantly rotates the rubber roll 17d. The corrugated board sheet lowering device 17 includes the stopper 16
After b is retracted, the air cylinder device 17c is extended to swing the swing lever 17a, and the rubber roll 17d constantly rotated by the motor 17e rotates in contact with the corrugated cardboard box W2 so that the corrugated cardboard box W2 is dropped and supplied. It has become.

As shown in FIG. 1, FIG. 4, FIG. 5, FIG. 6, and FIG.
1, a pressing plate 22, a lower rear lid piece bottom folding means 23, an abutting plate 24, and a lifting plate 60 as main elements, and are formed in a corrugated board box W2 on the rear surface of the corrugated board sheet W1. On the receiving conveyor 50, the corrugated board sheet W1 dropped and supplied to the upstream end of the sandwich conveyor 1 by the corrugated board sheet supply device 10 is arranged so that the rear surface portion W2 _C corresponds to the sandwiching space of the corrugated board box of the sandwich conveyor 1. After receiving it, the vacuum pad 21, the receiving conveyer 50, and the pressing plate 22 work together to open in a rectangular tube shape that opens up and down, and then the lower rear side lid piece bottom folding means 23 causes the lower rear side of the cardboard box W2. Lid W
2 _C ^′ is folded to the bottom, the cardboard box W2 is slightly lifted from the receiving conveyor 50 by the lifting plate 60, and the bottom is semi-closed to form a box shape, and the vacuum pad 21 is moved forward again to move the cardboard box W2 to the sandwich conveyor 1 It is a means to serve as a forward feed so as to be sandwiched between.

The vacuum pad 21 directs its suction direction toward the bracket 21b supported by the slider 21a 'of the slide unit 21a, which can reciprocate in the conveying direction of the sandwich conveyor 1 on the upstream side of the sandwich conveyor 1. Attached to a vacuum generator (not shown) via a flexible hose (not shown), the slider 21a 'is connected to the winding traveling body 21d' of the winding mechanism 21d attached to the slide unit 21a, As the winding traveling band 21d ′ is reciprocated by the drive of the motor 21c as required, the corrugated cardboard sheet W1 is dropped and supplied at the upstream end of the sandwich conveyor 1 and received on the receiving conveyor 50. The cardboard box W2 is moved forward toward the cardboard box W2 and suction-protected. After holding it, the cardboard box W2
Of the corrugated cardboard box W2 by the length S of the sandwich conveyor 1
It is designed to be advanced so as to be sandwiched between.

The receiving conveyor 50 is an endless conveyor belt (multi-story chain belt or timing belt) 50 having a rugged or rough surface.
a is adopted, and the upper surface of the conveyor travel belt 50a is always traveled by the motor 50b in a direction orthogonal to the right in the transport direction of the sandwich conveyor 1. Then, by entering the respective size of the cardboard boxes W2 to the data input device (not shown), the motor 50c is driven, four lower lid piece cardboard box W2 W2 _a ^', W2 _b
^', W2 ^_c', so that the height of the box bottom surface when folded bottom an W2 _d ^'is always constant, the height level of the nest surface, may receive a lower front cover piece carton W2 It is designed to be adjusted automatically.

The pressing plate 22 is elastically held by the bracket 21b that supports the vacuum pad 21, and moves integrally with the vacuum pad 21.
Pressing plate 22 is being urged by a spring 22a slightly before falling state de minimis size protrudes from the vacuum pad 21 by the upper vacuum pads 21, surface portion W2 _c is adsorbed after the cardboard box W2 by vacuum pad 21 If, so as to press the upper than vacuum pad 21 of the rear surface portion W2 _c. Therefore, the vacuum pad 21
In the operation process of moving forward toward the corrugated board sheet W1 received on the receiving conveyor 50, sucking and holding the corrugated board box W2, and then retracting by the length S of the corrugated board box W2, the pressing plate 22 is The lower front lid piece W2 _d ^′ of the cardboard box W2 serves to push the lower front lid piece W2 _d ^′ onto the receiving conveyor 50, and in the receiving conveyor 50, the lower front lid piece W2 _d ^′ of the cardboard box W2 is conveyed to the sandwich conveyor 1. The vacuum pad 21 cooperates with the pressing plate 22 and the receiving conveyor 50 so that the corrugated cardboard sheet W can be moved in a direction orthogonal to the right direction.
1 has a function of opening in a rectangular tube shape.

The lower rear lid piece bottom folding means 23 is attached to the bracket 21b for supporting the vacuum pad 21 so as to move integrally with the vacuum pad 21, and the rack 23c is directly moved by the air cylinder 23b. Then, when the pinion 23d that meshes with the rack 23c rotates, the bottom folding plate 23a fixed to the pinion 23d swings so as to be horizontal from the hanging state to the front side, and the vacuum pad 21 is pressed. after opening the cardboard sheet W1 to rectangular tube in cooperation with the plate 22 and nest conveyor 50, folding the bottom of the lower rear lid piece W2 _C ^'cardboard box W2 bottom folding plate 23a horizontally swung .

The contact plate 24 is a vertically long plate having a function of guiding the drop of the cardboard box W2 in cooperation with the drop guide 12e, and hangs down from the front end of the movable member 13c at the upstream end of the sandwich conveyor 1. Therefore, the sandwich conveyor 1 is automatically adjusted so as to be lined up at the right end of the sandwiching space of the corrugated board box in the transport direction, and thus to correspond to the change in the width dimension of the corrugated board box W2. The abutting plate 24 receives a force that the corrugated board sheet is transferred in a direction orthogonal to the right direction in the conveying direction of the sandwich conveyor 1 that is received on the receiving conveyor 50, so that the corrugated board sheet is received by the receiving conveyor. in the time it is received in the top 50, surface portion W2 _c is the sandwich conveyor 1 cardboard box entrapment cardboard box so as to correspond to the space W2 after carton W2
And the vacuum pad 21 opens the cardboard box W2 in a rectangular tube shape, the front part W2 _d of the cardboard box W2 becomes the cardboard box sandwiching space of the sandwich conveyor 1. Correspondingly, it serves to stop contacting the edge of the cardboard box W2.

The lifting plate 60 is slightly smaller than the receiving surface of the receiving conveyor 50, and the vacuum pad 2
1 and the receiving conveyor 50 and the pressing plate 22 jointly work to open the air cylinder 6 at the time of opening into a vertically open tubular shape.
By lifting slight dimensions in contact with the lower lid piece W2 _b ^'of the left cardboard box W2 lifted by 0a,
The lower front lid piece W2 _d ^{′ of the} cardboard box W2 serves to prevent the receiving conveyor 50 from receiving a force.

Next, the operation of the box making apparatus constructed as described above will be described, and the box opening apparatus for corrugated board sheets in the box making apparatus will be explained through this explanation. When the length, width and height of the cardboard box W2 are input to a data input device (not shown), the motor 1i drives and the sandwich conveyor 1 automatically adjusts the conveyor sandwiching space to the width size of the cardboard box W2. 44 is driven and the floating prevention guide 45 automatically adjusts the height,
7c is driven to adjust and move the air cylinder 47b on the downstream side to a position corresponding to the length size of the cardboard box W2, the motor 13d is driven to adjust and move the guide bar 13a, and the motor 12c is driven to drive the cardboard box. The auxiliary table 12a is adjusted and moved so that the lower end of the box W2 on the left side in the transport direction can be placed, and the motor 22c is driven to automatically adjust the height level of the receiving conveyor 50, and thus the cardboard boxes W2 of various sizes. It has the versatility to process

Next, after the respective parts corresponding to the size of the cardboard box W2 are automatically adjusted, the cardboard box W2 is loaded. The corrugated board sheet W1 is brought into contact with the guide bar means 15 for positioning the right end of the corrugated board box, stacked on the supply conveyor 11 and the corrugated board box overhanging auxiliary loading table device 12, and the corrugated board sheet W1 is pushed by the corrugated board sheet pushing means 15. Cardboard box W2 when set to boost
Is received vertically by the group of rollers 14b of the corrugated cardboard sheet receiving wall 14, and the stopper 16b of the drop stopping device 16 receives the frontmost corrugated cardboard sheet W1 which is detached from the supply conveyor 11 and falls by its own weight. The rear surface portion W2 _c of the cardboard box W2 corresponds to the cardboard box sandwiching space of the sandwich conveyor 1.

Then, when the operation switch is turned on, the motors 1e and 1f of the sandwich conveyor 1 are constantly driven to cause the conveyor belts 1c and 1c to travel, and the receiving conveyor 5
0 motor 22b is always driven to convey belt 22a
The upper surface of the conveyor travels in the direction orthogonal to the right toward the conveying direction of the sandwich conveyor 1, and the motor 11a of the supply conveyor 11 is always driven to convey the conveyor traveling bodies 11b and 11b.
The upper winding part of the board always slides on the horizontal plate 11c in the direction of the corrugated board sheet receiving wall 14 to give a carrying force to the stacked corrugated board sheets W1, and the motor 17e of the corrugated board sheet lowering device 17 is always driven. Then, the rubber roll 17d rotates.

Next, when the air cylinder device 16a of the drop stopping device 16 is operated and the stopper 16b is retracted, the air cylinder device 17c of the corrugated cardboard sheet lowering device 17 is extended and rocks the rocking lever 17a to move the motor 17e.
The rubber roll 17d, which is constantly rotated by the contact roller 5d, rotates in contact with the corrugated board sheet W1 and receives the corrugated board box W2.
It was dropped and supplied onto the 0 surface portions W2 _c 'after the cardboard box W2 correspond to the space sandwiched cardboard box sandwich conveyor 1.

[0038] Then, the length of the surface portion W2 _c 'suction held by the stepped cartons W2 after cardboard box W2 dropped supplied onto the nest conveyor 50 advances the vacuum pad 21 by the drive motor 21c is S Just retreat. in this case,
In the operation process in which the vacuum pad 21 sucks and holds the cardboard box W2 and then retracts, the pressing plate 22 causes the lower front lid piece W2 _d ^′ of the cardboard box W2 to be received by the receiving conveyor 5
In the receiving conveyor 50, it also serves to push the lower front lid piece W2 _d ^′ of the corrugated cardboard box W2 in the direction orthogonal to the right toward the transport direction of the sandwich conveyor 1, Accordingly, the vacuum pad 21 cooperates with the pressing plate 22 and the receiving conveyor 50 to open the corrugated cardboard sheet W1 into a rectangular tube shape. Then, the lifting plate 60, the lower lid piece of the left cardboard box W2 lifted by the air cylinder 60a W2 _a ^', W
The lower front lid piece W2 _d ^′ of the corrugated cardboard box W2 is received by the receiving conveyor 50 by abutting on 2 _b ^′ and slightly lifting it.
Do not receive power from. Then, the air cylinder 23b of the lower rear lid piece bottom folding means 23 operates to operate the rack 2
The bottom folding plate 23a swings so as to be horizontal from the hanging state to the front side through the 3c and the pinion 23d, and the corrugated cardboard box W2
Folding the bottom of the W2 _C ^'rear lid piece bottom of. Then, the vacuum pad 21 advances again by the length S of the corrugated board box W2, and advances the corrugated board box W2 so that it is sandwiched by the sandwich conveyor 1.

Next, in the sandwich conveyor 1, the motors 1e and 1f are constantly driven, and the corrugated cardboard box W2 is sandwiched between a pair of left and right endless conveyor belts 1c and 1d for conveyance. In this sandwich conveyor 1, the motor 1e on the right side in the conveying direction is set to be a required speed slightly faster than the motor 1f on the left side.
When c and 1d sandwich the cardboard box W2 and convey it,
The corrugated cardboard box W2 can be prevented from becoming a parallelogram in the direction in which the corrugated cardboard box W2 is flatly folded, and the pinching force against the corrugated cardboard box W2 can be secured and the cardboard box W2 can be effectively conveyed. The pair of left and right rail guides 40, 40 are sandwiched by the sandwich conveyor 1 by a shape that linearly inclines and descends or descends in a quarter arc shape toward the upstream end of the upstream side upper surface portion. The lower front lid piece W2 _d ^′ of the corrugated cardboard box W2 is bottom-folded to guide the placement, and subsequently the lower rear lid piece W2 _d ^′ of the corrugated cardboard box W2 folded to the bottom is placed and guided. Then, after a first sensor (not shown) detects the passage of the front end of the corrugated board box W2, when a required short time of less than one second elapses, the hot melt injection nozzles 41, 41 inject hot melt to lower the corrugated board box W2. Hot melt is applied to the right and left two places on the lower surface of the front lid piece W2 _d ^' , and subsequently, a second sensor (not shown) installed upstream of the hot melt injection nozzles 41, 41 on the required upstream side is behind the corrugated cardboard box W2. When required slight time less than one second from the detection of the passage of the end, the lower rear lid piece cardboard box W2 hot melt jet nozzle 41, 41 to inject hot melt W2 _C ^'
Apply hot melt to two places on the left and right of the lower surface. In order to guide the corrugated cardboard box W2 that moves to the downstream side of the sandwich conveyor 1 onto an extension straight line of the conveyance path line in the sandwich conveyor 1, a pair of left and right guide members 42, 42
Guides both side surfaces of the cardboard box W2 in close contact with each other, and guides the cardboard box mounting plate 43 to place the bottom-folded lower lid pieces on the front and back of the cardboard box W2. Lightly and closely guide the two upper lid pieces that are upright and open. Then, when a third sensor (not shown) detects the passage of the rear end of the corrugated board box W2 from the sandwich conveyor 1, the air cylinder 46a operates and the lid piece bottom folding plates 46c, 46 are operated.
c is a lower lid piece W2 _a ^′ , W2 _{b on} both sides of the cardboard box W2 whose movement is restricted by the guide members 42, 42, the cardboard box mounting plate 43, and the floating prevention guide 45.
^' Being closed from both sides from the outside to perform bottom folding, and the air cylinders 47a and 47b are extended so that the pressing heads 47c and 47c
47d is the lower lid piece longitudinal of the cardboard box W2 W2 _C ^',
The upper and lower lower lid pieces W2 _d ^′ and W2 _d ^′ are pressed by the upper surface portions of W2 _d ^′ corresponding to the lid piece bottom fold plates 46c, 46c, and the front and rear lower lid pieces W by the hot melt attached to the lower surfaces of the front and rear lower lid pieces W2 _C ^′ , W2 _d ^′.
2 _C ^' , W2 _d ^' and lower lid pieces W2 _a ^' , W2 _b ^{' on} both sides
After bonding for about 1 second, the air cylinder 47
a and 47b turn to the reduction operation, and press heads 47c and 47
d rises and returns.

The structure of the box making apparatus shown in FIG. 10 will be described.
Through this description, the configuration of the cardboard sheet opening device in the box manufacturing device according to the second embodiment of the present invention will be described. In this box making device, the sandwich conveyor 1 is long, the lid is closed with an adhesive tape instead of hot melt, and the corrugated cardboard sheet lowering device 17 is used.
In the first embodiment, the roller group 14b attached to the corrugated cardboard sheet receiving wall 14 is abolished, and a belt type vertical feeding device 17g that is intermittently driven when the corrugated cardboard sheet is lowered by a motor 17f is provided therein. The rubber roll 17d provided in 1. is provided below the supply conveyor 11 and is always rotated by the motor 17e. After the stopper 16b is retracted, the air cylinder device 17c is extended to cause the rubber roll 17d to move to the cardboard box W2. It is characterized in that the corrugated cardboard box W2 is dropped and supplied by rotating in contact with.

Explaining it, the corrugated board sheet feeding device 10
The corrugated board sheets W1 stacked on the supply conveyor 11 are placed on the receiving conveyor 50 of the box opening pre-feeding device 20 such that the rear surface portion W2 _c of the corrugated board box W2 faces the cardboard box sandwiching space of the sandwich conveyor 1. To the upstream side of the sandwich conveyor 1 by suction and holding the rear surface portion W2 _c of the cardboard box W2 by the vacuum pad 21 and moving at least the length dimension of the cardboard box W2. giving force to open the cardboard boxes W2 in rectangular tube by pressing W2 the lower front cover piece W2 _d ^'of the nest conveyor 50, the cardboard box W
The front part W2 _d of 2 opens in a rectangular tube shape so as to correspond to the sandwiching space of the corrugated cardboard box of the sandwich conveyor 1, and the bottom folding plate 23a is rocked so as to be horizontal to the front side and the lower rear lid of the corrugated cardboard box W2. The piece W2 _C ^' is folded into a box shape with the bottom half closed, the vacuum pad 21 is moved forward again, and the corrugated cardboard box W2 is forward-fed and sandwiched by the sandwich conveyor 1 to be conveyed. The lower front lid piece W2 _d ^′ of the cardboard box W2 is bottom-folded by the guiding action of 48, and then the bottom lid pieces W2 _a ^′ , W2 _b ^′ on both sides are bottom-folded so that their mating edges are adhered together by the adhesive tape sticking device 70. With this, the adhesive tape is used for eye-catching. The lid piece bottom folding guides 48, 48 are sandwiched between a pair of conveyor belts of the sandwich conveyor 1 and are conveyed and passed in the corrugated cardboard box W.
2 on both sides of the lower lid piece W2 _a ^', W2 _^b' serve to support the in placed state Trey until horizontally. In addition,
Since the structure and operation of the adhesive tape sticking device 70 are well known as disclosed in Japanese Patent Laid-Open No. 5-96664, detailed description thereof will be omitted.

The cardboard box W2 may be dropped and supplied by hooking the upper end or other required portion with a claw and pulling it down with respect to the cardboard box W2 from which the drop stop device 16 has released the drop stop.

[0043]

As described above, according to the corrugated board sheet feeder of the present invention, the corrugated board sheet is sandwiched between the corrugated board sheet receiving wall and the corrugated board sheet pushing means, and the supply conveyor is slidably contacted with the lower end of the corrugated board sheet. The cardboard sheets are brought into close contact with each other by pre-shooting the front cardboard sheet in the gap between the cardboard sheet receiving wall and the supply conveyor and stopping, and when the stop is released, the cardboard sheets are forcibly dropped. Can be reliably separated and can be dropped and supplied at high speed. Further, according to the corrugated board sheet feeder of the present invention, the pair of conveyor traveling bodies is fixed so that the pair of conveyor traveling bodies that are supply conveyors can place the lower ends on both sides of the corrugated sheet having the minimum width. When changing the width of the corrugated cardboard sheet, an adjustable auxiliary table supports the lower end of the corrugated sheet on the projecting side, and an adjustable guide bar for corrugated sheet edge alignment adjusts the corrugated sheet edge. Then, when the corrugated cardboard sheet is opened in a rectangular tube shape, the rear surface part corresponds to the sandwiching space of the sandwich conveyor, so even if the size of the corrugated cardboard box changes, adjustment to the loading position corresponding to the drop position. This makes it possible to complicate the equipment, such as using a double table structure for the sandwich conveyor frame.
It does not lead to an increase in size, and the corrugated cardboard sheet has a maximum width dimension of 1000 mm and a minimum width dimension of 400 mm.
However, the size can be changed and the versatility of the size is extremely large.

[Brief description of drawings]

FIG. 1A is a front view of a box making device for explaining the configuration of a corrugated board sheet supply device according to a first embodiment of the present invention, and FIG. The perspective view which shows the folding process which shows the state which carries out the bottom folding of the one lower lid piece.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view showing a state in which the corrugated board sheet of FIG. 1 is removed.

FIG. 4 is a plan view taken along line IV-IV in FIG.

FIG. 5 is a plan view seen from line IV-IV in FIG. 1 and is a plan view with a corrugated cardboard sheet that is dropped and supplied and opened.

FIG. 6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.

FIG. 9 shows a state in which the sandwich conveyor is adjusted to have the smallest sandwiching dimension of the corrugated board box and the auxiliary table and the guide bar are positionally adjusted in order to make the corrugated board sheet having the minimum width. 3A is a plan view corresponding to FIG. 3, and FIG. 4B is a plan view corresponding to FIG.

FIG. 10 is a front view of a box making device for explaining the configuration of the corrugated board sheet feeding device according to the second embodiment of the present invention.

[Explanation of symbols]

W1 · · · cardboard sheet W2 · · · cardboard boxes W2 _a ^', W2 _^b' ··· each side of the lower lid piece W2 _c ^'· · · lower rear lid piece W2 ^_d' · · · lower front cover piece 1, ··· Sandwich conveyor 11 ・ ・ ・ Supply conveyors 11b, 11b ・ ・ ・ Conveyor traveling body 12a ・ ・ ・ Auxiliary table 13a ・ ・ ・ Guide bar for aligning cardboard sheet edges 14 ・ ・ ・ Receiving wall 15 for corrugated cardboard Sheet pushing means 16 ・ ・ ・ Fall stop device 17 ・ ・ ・ Corrugated board sheet lowering device

Claims (2)

[Claims] 1. A corrugated cardboard sheet is opened in a rectangular tube shape, and the lower lid pieces on four sides are bottom-folded to form a corrugated box. In the corrugated cardboard sheet supply device configured as described above, the supply conveyor is configured to travel the conveyor traveling body that always travels and to convey the corrugated sheet by slidingly contacting the lower end surface of the corrugated sheet with the conveyor traveling body, A corrugated cardboard sheet receiving wall for receiving the frontmost corrugated cardboard sheet detached from the supply conveyor, which is provided upright with a gap for dropping one corrugated cardboard sheet in front of the transport downstream end of the supply conveyor, and the supply conveyor. Corrugated cardboard sheet pushing means capable of pushing the corrugated cardboard sheets loaded thereon and releasing the pushing force appropriately; A drop stop device that stops the front corrugated board sheet that falls into the gap between the ball sheet receiving wall and the first corrugated board sheet at a height that does not interfere with the process of opening the supplied corrugated board sheet into the box shape, and the fall stop device When the fall stop is released, the corrugated cardboard sheet is brought into contact with a roller that is rotationally driven or an endless belt that is traveling driven, or by pulling down the upper end of the corrugated cardboard sheet with a claw that is moved downwards. A corrugated cardboard sheet feeding device comprising: a corrugated cardboard sheet lowering device for dropping and feeding. 2. A sandwich conveyor that automatically adjusts the sandwiching dimension of the conveyor sandwiching space to the width of the corrugated board box with the center of the interval as a reference, sandwiches the corrugated cardboard box and conveys it, and bottom-folds the four bottom lid pieces. Then, the corrugated board is placed on the supply conveyor so that the rear surface of the corrugated board is opened in a rectangular tube shape in the corrugated box forming machine so that the rear surface corresponds to the sandwiching space of the corrugated board box of the sandwich conveyor. In the corrugated cardboard sheet feeding device configured to drop and feed the corrugated sheets one by one, the feeding conveyor has a conveyor traveling body corresponding to a size in which the corrugated cardboard sheet mounting width can mount a corrugated cardboard sheet having a minimum width. A configuration in which the corrugated cardboard sheet can be conveyed by sliding on the lower end surface of the corrugated cardboard sheet by the conveyor traveling body to convey the corrugated cardboard sheet. An auxiliary table protruding laterally of the supply conveyor is interlocked with the size of the corrugated cardboard sheets stacked on top, and the lower end of the protruding end protruding laterally of the cardboard sheet supply conveyor is placed by the auxiliary table. Possible auxiliary table device, and the end of the corrugated cardboard sheet extending parallel to the conveyor feeding direction, which is adjusted and moved to the side of the feeding conveyor opposite to the auxiliary table in association with the size of the corrugated cardboard sheets accumulated on the feeding conveyor. The sandwich conveyor has a guide bar for aligning, and the guide bar for aligning the edges of the corrugated cardboard is brought into contact with the side edge of the corrugated box to align the edges of the corrugated sheet and the rear surface of the corrugated cardboard when the box is made into the corrugated box. Between the guide bar device corresponding to the cardboard box sandwiching space and the feeding conveyor on the front of the downstream end of the feeding conveyor. It is possible to boost the corrugated cardboard sheet receiving wall that receives the foremost corrugated cardboard sheet that is erected with a gap that can drop one roll sheet and that is detached from the supply conveyor, and the corrugated cardboard sheet that is stacked on the supply conveyor. And a corrugated cardboard sheet pushing means that can appropriately release the pushing, and the first corrugated cardboard sheet that falls off the supply conveyor and falls into the gap between the corrugated cardboard sheet receiving wall is dropped first, and the corrugated cardboard sheet that has been fed is box-shaped. A fall stop device that stops at a height that does not interfere with the opening process, and a roller that is driven to rotate or an endless belt that is driven to travel to the frontmost corrugated cardboard sheet when the drop stop device releases the fall stop The cardboard sheet is dropped and supplied by pulling it down or by pulling down the upper end of the cardboard sheet with a claw that is moved down. Corrugated sheet supply apparatus characterized by comprising a corrugated sheet descending device.