JP4999568B2 - Box making method - Google Patents

Description

The present invention, together Ri adhered two sheets of base paper relates Seihako process for producing a box body made of paper.

  Conventionally, when two base papers (hereinafter abbreviated as 2P sheets) are glued to form a box, the sheets are manually supplied to the glued box making machine. And there are the following two methods as a box making method in a 2P sheet box making machine, in particular, a sheet feeding method.

  First, as shown in FIG. 9, in the first method, the worker W folds back each sheet S (in the left and right sheets SL and SR, the long side portion sl and the short side portion ss are turned upside down. ), A method of inserting into the sheet guide 2 of the box making machine. That is, the sheet S is inserted into the sheet guide 2 with a fold line So.

  According to this method, each sheet SL, SR can be inserted alternately by left and right by one worker W. It is also possible for two workers W1 and W2 to insert the left and right sheets SL and SR almost simultaneously. The sheet S is conveyed by a kicker or a belt.

  Next, as shown in FIG. 10, the second method is to insert the upper sheet SU manually by the operator W without folding the sheet S, and then insert the lower sheet SD, and the gluing flap F in the machine. This is a method of folding in.

  According to this method, it is not necessary to manually fold the flap F, but it is necessary to turn the sheet S upside down. For this reason, the sheet S cannot be inserted at the same time. And since the insertion position of the sheet | seat S becomes the same, the worker W must work in the same place and cannot perform an insertion operation by two persons. For this reason, the current situation is that production does not go up easily.

  On the other hand, there is also a method of supplying a sheet mechanically, and for example, Patent Document 1 is known as a corrugated paper feeding device in a corrugated box making machine.

JP-A-8-169579

  However, the method in which the sheets SL and SR are folded and inserted into the sheet guide 2 of the box making machine according to the first method described above is problematic in that the sheet S is folded at places other than the folds, and defective products are likely to occur. There was a point.

  Further, in the method of manually inserting each sheet S according to the above-described second method, it is necessary to turn the sheet S upside down, so that it is not possible to insert two sheets S at the same time. For this reason, there is a problem that the worker W cannot share the work.

  Further, the conventional corrugated paper sheet feeder cannot supply two base papers.

  In view of the above problems, an object of the present invention is to provide a box making method that can automatically feed two base papers.

The present invention has been proposed in view of the above, the invention according to claim 1, together Ri adhered two sheets A Seihako method for automatically producing a box body, the inner sheet downwards An upper sheet feeding step for supplying the upper sheet to the upper sheet ear folding portion of the box making device, the upper sheet ear folding portion of the box making device with the inner side of the sheet facing upward so as to face the upper sheet feeding step , In the lower sheet supply step for supplying the lower sheet to the lower sheet ear fold at the opposite position , in the upper sheet ear fold, one end of the upper sheet is folded 180 degrees downward by the lowering and forward / backward movement of the ear fold unit. forming a step folded sheet ear on that with the habit folding raises the unit, the lower sheet ear folding section, rising of the ear folding unit the ends of the lower sheet on the side opposite to the one end of the upper sheet and Move back and forth Ri forms a flap by folding 180 degrees on the upper side, the lower sheet ear folding step that the habit folding is lowered the unit, the sheet on which the formation of the flap, is provided a sheet receiving and elevator Seihako device Upper sheet transporting process for transporting to the sheet crimping part, lower sheet transporting process for transporting the lower sheet on which the flap is formed to the sheet crimping part provided with a sheet receiver and an elevator of the box making apparatus, and in the middle of the lower sheet transporting process In the other end of the lower sheet corresponding to the flap formed on the lower sheet and the upper sheet flap, the glue application step of applying glue from the upper side, the upper sheet and the lower sheet transferred to the sheet crimping section are aligned. of said sheet receiving and the elevator justification process aligned to the predetermined position, the sheet and lower sheet over in position to sizing by movement back and forth of the plate Crimping holding step of sandwiching by crimping held in, together denoted glue and conveyed on and lower sheets alternately by each step described above, by sequentially lowering the elevator, a sheet of crimped vertically integrated into a predetermined number A stacking process that stacks while holding the crimped state until it reaches, a discharge process that waits for a predetermined number of upper and lower integrated sheets pressed by the conveyor crimping plate on the discharge conveyor and discharges in a stacked state It is characterized by including each process of these.

  According to the present invention, it is possible to automatically supply two base papers that have been performed manually by using the stacked base papers. In addition, since the supplied base paper is not folded except for the folds, generation of defective products with unnecessary creases is reduced. Therefore, even a base paper that is easy to break can be boxed.

  The outline of the box making method according to the present invention is, as shown in the perspective view of FIG. 1, an upper sheet supply step, a lower sheet supply step, an upper sheet ear fold step, a lower sheet ear fold step, an upper sheet transfer step, It includes a sheet transfer process, an adhesive application process, a pressure-bonding holding process, a stacking process, and a discharging process.

  And each process in this box making method is performed in the box making apparatus 1 (hereinafter, sometimes referred to as a glue machine 1 or simply a machine 1) configured as shown in FIGS. .

  The glue machine 1 is arranged on the upper sheet supply unit, the lower sheet supply unit, and the base paper S on which the base paper S (hereinafter also referred to as a sheet S) is stacked on the left and right sides (up and down in FIG. 2) of the discharge conveyor 100. An upper sheet ear fold portion and a lower sheet ear fold portion that form the flap F are formed, and a sheet crimp portion that crimps the flap F is formed along the discharge conveyor 100.

  That is, the machine 1 includes an upper sheet conveying unit 111 and a lower sheet conveying unit 112 that convey the base paper S on which the flap F is formed to the sheet crimping unit, and an upper sheet ear folding unit that bends one end of the base paper S to form the flap F. 121 and lower sheet ear folding unit 122, upper sheet supply drive unit 131, lower sheet supply drive unit 132, ear retainer 141, sheet receiver 142, sheet alignment plate 144, cold glue tank 145, sheet guide adjustment handle 146, sheet guide 147 Further, a sheet rear end receiving plate 148 and the like are provided.

  Further, as shown in FIG. 3, the machine 1 is provided with a side ruler 151, a sheet conveyance drive unit 152, an elevator pressure reducing valve 161, an oil mist filter 153, a cold glue tank pressure reducing valve 154, and the like.

  Further, as shown in FIG. 4, the machine 1 includes an upper sheet supply unit 133, a lower sheet supply unit 134, a pressing roller 155, a cold glue gun 156, a gate plate 157, a rear ruler 158, a lower sheet vacuum pump 171 and an elevator. A slide plate 162, an elevator 160, a discharge conveyor 100, an upper sheet vacuum pump 172, a main pressure reducing valve 173, a conveyor roller 174, a conveyor pressure plate 175, and the like are provided.

  In the glue machine 1, first, the sheets S as the base paper S are stacked in a predetermined direction on the upper sheet supply unit and the lower sheet supply unit provided on the left and right sides of the machine 1. That is, the upper sheet supply unit is stacked with the inner side of the upper sheet Su facing down. On the other hand, the lower sheet supply unit is stacked with the inner side of the lower sheet Sd facing upward. Note that the sheet S is, for example, a thin cardboard having a B flute.

  Next, an upper sheet supply step of supplying the upper sheet Su with the inner side facing downward to the upper sheet ear folding part of the machine 1, and a lower sheet Sd with the inner side facing upward at the lower sheet ear folding part of the machine 1 Each of the lower sheet supply steps to be supplied is executed.

  That is, on the lower side of the upper sheet supply unit and the lower sheet supply unit, a suction cup 176d facing the upper sheet Su or the lower sheet Sd from the lower side is movably disposed, and the upper sheet Su and the upper sheet Su stacked in a predetermined direction are arranged. The lower sheets Sd are arranged so that the suction cups 176d adsorb one by one from the lower side. Then, the suction cup 176d that adsorbs the upper sheet Su and the lower sheet Sd advances, and the upper sheet Su and the lower sheet Sd are respectively transferred to an upper sheet ear fold portion 180 and a lower sheet ear fold portion 190 described later (upper sheet). Supply process, lower sheet supply process). Note that these transfers are performed such that the transfer of the lower sheet Sd precedes the transfer of the upper sheet Su.

  In each ear fold, a so-called ear fold process is performed in which a flap F serving as an adhesive margin is formed at the end of each sheet S, so-called ear fold. When the sheet S is adsorbed by the upper sucker 176u facing the upper sheet Su or the lower sheet Sd from the upper side, the lower sucker 176d stops adsorbing, and the lower sucker 176d is moved backward to move to the next sheet. It is set to move to S transfer.

  That is, the upper sheet ear folding unit 180 executes an upper sheet ear folding process in which one end of the upper sheet Su is folded 180 degrees downward to form the flap F. In the upper sheet ear fold 180, as shown in FIG. 7, first, (1) the sheet presser 181 presses the upper sheet Su from above. Next, (2) the ear folding unit 182 is lowered, and one end portion of the upper sheet Su that becomes the flap F is bent 90 degrees downward. Next, (3) the ear folding unit 182 is advanced inward to fold the flap F 180 degrees. (4) Raise the ear fold unit 182 upward, crimp the folded corner of the flap F, and attach a crease. (5) The upper sheet Su is sucked by the suction cup 176u from above, and the ear folding unit 182 is lowered. (6) The suction cup 176u (not shown) holding the upper sheet Su moves forward (right side in the drawing) and transfers the upper sheet Su to the crimping section provided in the machine 1. Then, after the upper sheet Su is removed from the ear fold, (7) the ear fold unit 182 is retracted, (8) is further raised, and the ear fold unit 182 returns to the standby position.

  On the other hand, the lower sheet ear folding unit 190 executes a lower sheet ear folding process in which one end of the lower sheet Sd is folded 180 degrees upward to form the flap F. That is, in the lower sheet ear fold 190, as shown in FIG. 8, first, (1) the sheet presser 191 presses the lower sheet Sd from above. Next, (2) the ear fold unit 192 is raised, and one end of the lower sheet Sd to be the flap F is bent 90 degrees upward. Next, (3) the ear folding unit 192 is advanced inward to fold the flap F 180 degrees. (4) The ear fold unit 192 is lowered, and the folded corner of the flap F is crimped to crease it. Then, (5) the lower sheet Sd is adsorbed from above by the suction cup 176u, and the ear folding unit 192 is raised. (6) The suction cup 176u (not shown) holding the lower sheet Sd moves forward (right side in the drawing), and transfers the lower sheet Sd to the next crimping part. Then, after the lower sheet Sd is removed from the ear fold, (7) the ear fold unit 192 is retracted, and (8) is further lowered, and the ear fold unit 192 returns to the standby position.

  In the middle of the lower sheet transfer process for transferring the lower sheet Sd to the crimping part, the glue application process is executed. That is, in this glue application step, the upper end of the flap F that is folded upward at one end of the lower sheet Sd and the other end on the opposite side of the lower sheet Sd that overlaps the lower surface of the flap F that is folded below the upper sheet Su. Glue is applied to the corresponding upper surface from above. Therefore, the cold glue gun 156 faces the conveyance path of the lower sheet Sd.

  Then, when the suction cup 176u sends the lower sheet Sd to the crimping part in the lower sheet transfer process, the sheet receiver 142 is opened. Therefore, the suction cup 176u descends on the elevator 160 that has been raised in advance, and lowers the lower sheet Sd. When the lower sheet Sd is placed on the elevator 160, the sheet S is positioned in the height (feed) direction by moving the sheet aligning plate 144 back and forth (position aligning step). In addition, since there is a guide in the width direction, the lower sheet Sd can be placed at a fixed position. When the lower sheet Sd is placed at a fixed position, the sheet receiver 142 is closed, the lower sheet Sd is sandwiched between the elevator 160 and the sheet receiver 142, and the lower sheet Sd is held. The sheet aligning plate 144 is driven by operating the sheet aligning drive cylinder 143.

  On the other hand, when the upper sheet Su is sent to the crimping part by the suction cup 176u in the upper sheet transfer process, the sheet receiver 142 is opened. Therefore, the suction cup 176u descends on the lower sheet Sd placed on the elevator 160 to lower the upper sheet Su. When the upper sheet Su is placed on the lower sheet Sd, the sheet S is positioned by moving the sheet aligning plate 144 back and forth (position aligning step). When the upper sheet Su is placed at a fixed position, the sheet receiver 142 is closed, the upper sheet Su and the lower sheet Sd are sandwiched between the elevator 160 and the sheet receiver 142, and both are held. That is, pressure bonding with glue is performed (pressure bonding holding step).

  As described above, the lower sheet Sd and the upper sheet Su are alternately conveyed, and the elevator 160 sequentially descends accordingly, and stacks a predetermined number of sheets S while maintaining the crimped state (stacking process). .

  When a predetermined number of sheets S are held while the elevator 160 is lowered, the slide plates 162 are moved forward to transfer the sheets S stacked on the discharge conveyor 100 (discharge process). Next, after the slide plate 162 has moved backward, the elevator 160 moves up again and enters the pressure bonding operation of the next sheet S.

  Further, in the illustrated embodiment, since vinyl acetate emulsion paste is used for bonding the sheets, it is necessary to ensure the bonding time. Therefore, the stacked sheets Sn transferred onto the discharge conveyor 100 have a stacked holding time for the lower sheets, and are sufficiently crimped by the weight of the stacked sheets Sn. On the other hand, the upper part of the stacked sheets Sn is not sufficiently crimped by the holding time and its own weight, so the flaps F of the stacked sheets Sn on the discharge conveyor 100, in other words, by the crimping plate 175 that descends the glued portion, Until the stacked sheets are fed, the glued portions of the sheets are held down, and the stacked sheets Sn are pressure-bonded and the bonding time is secured (standby step).

  When the next stacked sheet Sn is sent from the crimping portion, the crimping plate 175 is raised and discharged out of the machine.

  Although the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and can be appropriately implemented without changing the configuration described in the claims. For example, the base paper may be A-stage or AB-stage, and the sheet size can be appropriately changed.

It is a perspective view showing an outline process of a box making method concerning the present invention. It is a top view of the box making apparatus which applies the box making method concerning the present invention. It is a front view of the box making apparatus which applies the box making method concerning the present invention. It is a left view of the box making apparatus which applies the box making method concerning this invention. It is a top view which shows a part of sheet | seat crimping | compression-bonding part of a box making apparatus. The side surface of a sheet | seat crimping | compression-bonding part is shown, (a) is an end view of the AA line in FIG. 5, (b) is an end view of the BB line in FIG. It is explanatory drawing of the ear folding operation | movement in an upper sheet ear folding part. It is explanatory drawing of the ear folding operation | movement in a lower sheet | seat ear folding part. It is explanatory drawing of the supply method of inserting the sheet | seat into a sheet guide, after showing the conventional sheet supply method with respect to a pasting box making machine, and folding a sheet | seat and making a crease | fold. It is explanatory drawing of the supply method which shows the conventional sheet supply method with respect to a pasting box making machine, and inserts a sheet | seat without folding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glue machine 100 Discharge conveyor 111 Upper sheet conveyance unit 112 Lower sheet conveyance unit 121 Upper sheet ear folding unit 122 Lower sheet ear folding unit 131 Upper sheet supply drive unit 132 Lower sheet supply drive unit 133 Upper sheet supply unit 134 Lower sheet supply unit 141 Ear presser 142 Sheet receiver 143 Sheet alignment drive cylinder 144 Sheet alignment plate 145 Cold glue tank 146 Sheet guide adjustment handle 147 Sheet guide 148 Sheet rear end receiving plate 151 Side ruler 152 Sheet conveyance drive unit 153 Oil mist filter 154 Cold glue tank decompression Valve 155 Presser roller 156 Cold glue gun 157 Gate plate 158 Rear ruler 160 Elevator 161 Elevate 163 Elevator slide plate 171 Lower sheet vacuum pump 172 Upper sheet vacuum pump 173 Main decompression valve 174 Conveyor roller 175 Conveyor pressure plate 176u Suction cup 176d Suction cup 180 Upper sheet edge fold 181 Sheet presser 182 Ear fold unit 190 Lower sheet Ear fold 191 Sheet press 192 Ear fold unit F Flap S Sheet So Fold W Worker sl Long side ss Short side

Claims (1)

The combined Ri adhered two sheets A Seihako method for automatically producing a box body,
An upper sheet supply step of supplying the upper sheet to the upper sheet ear fold of the box making apparatus with the inside of the sheet facing downward;
A lower sheet supply step of supplying a lower sheet to a lower sheet ear fold portion at a position facing the upper sheet ear fold portion of the box making apparatus with the inner side of the sheet facing upward so as to face the upper sheet supply step;
In the above sheet ear folding unit to form a flap by folding 180 degrees on the lower side by the downward and forward and backward movement of the unit folded ears one end of the upper sheet, step folded sheet ear on that with the habit folding raises the unit,
At the lower sheet ear fold, the end of the lower sheet opposite to one end of the upper sheet is folded 180 degrees upward by the upward and backward movement of the ear fold unit to form a flap , and the unit is lowered and folded. lower sheet ear folding process that put a habit,
An upper sheet transfer step of transferring the upper sheet on which the flap is formed, to a sheet crimping portion provided with a sheet receiver and an elevator of a box making apparatus;
A lower sheet transfer step of transferring the lower sheet on which the flap is formed, to a sheet crimping portion provided with a sheet receiver and an elevator of a box making apparatus;
In the middle of the lower sheet transfer step, a glue application step of applying glue from above to the other end of the lower sheet corresponding to the flap formed on the lower sheet and the upper sheet flap,
A position aligning step of aligning the upper sheet and the lower sheet transferred to the sheet crimping portion at a predetermined position by moving the sheet aligning plate back and forth ;
A pressure-bonding holding step in which the upper sheet and the lower sheet in a predetermined position are glued and held between the sheet receiver and the elevator ;
The upper sheet and the lower sheet are alternately conveyed and glued by the above-described steps, and the elevator is sequentially lowered to stack the upper and lower integrated sheets while maintaining the crimped state until a predetermined number is reached. Stacking process,
A discharge process in which the upper and lower integrated sheets that have reached a predetermined number are waited in a state of being pressed by a conveyor pressure plate on a discharge conveyor, and discharged in a stacked state,
A box making method comprising the steps of:

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