JPH0476852B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention automatically unwraps sheets that are wrapped in wrapping sheets in a predetermined number of layers before being applied to a printing machine, etc. This invention relates to a method and apparatus for unsealing and stacking packaging sheets, which are separated and then stacked.

"Conventional technology" Conventionally, when printing a large number of large sheets wrapped in packaging sheets such as wamps, the wrapping sheets stacked in multiple tiers were manually stacked one bundle at a time. At wholesalers, the packaging sheet is cut using a knife, etc., the package is opened, and the sheets are taken out.The sheets are separated by hand to avoid double-sheet feeding, then stacked again, and then sent to the printing machine. Ta.

``The problem that the invention seeks to solve'' Therefore, it required a great deal of effort and was inefficient.

It is an object of the present invention to enable such work, which has conventionally been performed manually, to be performed automatically and efficiently.

"Means for Solving the Problems" Therefore, in the method of the present invention, packaging sheets wrapped in a predetermined number of layers with packaging sheets are stacked in multiple tiers, and each tier is raised to a predetermined height. Cut the left and right sides of the packaging sheet with a cutter while advancing it one step. Furthermore, the forward movement is stopped and the front surface of the packaging sheet is cut with a cutter. After this,
The upper and lower surfaces of the cut packaging sheet are suctioned to open the packaging sheet vertically, and the unsealed sheets for one layer are held and extracted from the packaging sheet and placed on a conveyance table. Then, after moving this conveyance table forward and conveying one stage of sheets to a stacking position, the conveyance table is moved backward while blowing air to the sides of the one stage of sheets, and the sheets are unloaded from there and stacked. .

In addition, in order to carry out this method, the apparatus of the present invention includes a lift table that stacks a predetermined number of stacked packaging sheets and lifts each stack to a predetermined height; There is a push mechanism that pushes the rear end of the top tier to move it forward, a left and right side cutter that cuts the left and right sides of the packaging sheet as it moves forward, and a push mechanism that slides along the rail to cut the front side of the packaging sheet after it stops moving forward. A front cutter that cuts, an upper and lower opening mechanism that adsorbs the top and bottom surfaces of the cut packaging sheet and displaces it upward and downward, respectively, and a clamp that holds the unsealed one-level sheet of paper to separate the packaging sheet. an ejecting mechanism that ejects sheets from the stack; a stacking table that can be raised and lowered; the ejected sheets are placed on the stacking table, the sheets are moved forward to the stacking table, and the sheets are placed on the stacking table by retreating. a conveyance platform for loading the sheets, an air inlet mechanism attached to the conveyance platform for blowing air into the sides of the loaded sheets, a stopper for regulating the retreat of the sheets when the conveyance platform retreats; It is equipped with the following.

"Function" According to the method of the present invention, the packaging sheets stacked in multiple tiers are moved up one tier at a time and advanced so that only the top tier is unloaded. will be automatically disconnected. Also, the front side is cut off after its forward movement has stopped.
Thereafter, the upper and lower surfaces of the packaging sheet are attracted and opened vertically, and in this state, the sheets are extracted from the packaging sheet and placed on a conveyance table. Then, after the conveyance table advances to the stacking position, it is moved backward so that the articles are stacked while being unloaded from the conveyance table. At that time, air is blown into the sheet from the side to separate it.

Further, in the apparatus of the present invention, the packaging sheets are stacked in multiple stages on the lift table, and the rear end of the uppermost stage is pushed by the pushing mechanism to be unloaded. After the left and right sides of the packaging sheet are cut by side cutters, the front face is cut by a front cutter that slides along the rail, and the packaging sheet is opened from the front end by upper and lower opening mechanisms. In this state, the sheet is held by a clamp, extracted, and placed on a conveyance table. The sheets are transported to the top of the loading table by the forward movement of this conveyance table, and when the conveyance table retreats, the sheets are unloaded by being restricted by stoppers from following this movement. It is loaded on the loading table. At this time, air is introduced into the sheet from the side. The air inlet location moves along the side of the sheet as the conveyor moves backward.

``Example'' An example of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, the apparatus according to the present invention is roughly divided into a lifting/pushing section 1, an unsealing/conveying section 2, and a stacking/aligning section 3.

A lift table 4 is suspended horizontally at its four corners by a chain 5 on the lifting/pushing part 1, and a sprocket wheel 6 meshing with the chain 5 is connected to the lift table 4 by a motor. When rotated, it is raised while remaining horizontal. packaging sheet,
For example, the wrapped sheets 8 wrapped in the wamp 7 (FIG. 6) are loaded onto the lift table 4 by a forklift or the like while being stacked in multiple stages on a pallet.

The lifting/pushing section 1 also has a positioning mechanism on its upper part for positioning the uppermost packaging sheet 8 from side to side, and a positioning mechanism for pushing the positioned packaging sheet 8 toward the unsealing/conveying section 2. The pushing mechanism 9 that moves and the wamp ejection mechanism 10 that ejects the wamp 7 after opening are arranged as follows.

As shown in FIG. 3, the positioning mechanism includes a vertical ruler plate 11 on the right side, a ruler adjustment mechanism 11a for adjusting its position, and a plurality of positioning pushers 12 on the left side.
and a positioning screw 1 that propels it to the right.
3 and a positioning motor 13a that rotates this, and the pushing body 12 moves the top packaging sheet 8
The left end is pushed and the right end is brought into contact with the ruler plate 11 for positioning.

As shown in FIG. 4, the pushing mechanism 9 includes a pushing screw 14 which is rotated by a pushing motor 9a (FIGS. 1 and 2), and which is screwed together and rotates along the guide rod 15. It is composed of a sliding plate 16 that slides back and forth along the sliding plate 16, and a plurality of pushing bodies 18 vertically attached to the sliding plate 16 by means of rods 17 so as to be able to slide up and down. A spring is attached to the rod 17 in order to urge the pushing body 18 downward. The front surface 18a of the pushing body 18 is inclined backwardly, and a protrusion 18b is formed at the lower end of the inclination. Further, an air nozzle 19 is attached to the pushing body 18 to spray air forward.

When the lift table 4 rises and the rear end of the uppermost packaging sheet 8 collides with the front surface 18a of the pusher 18 and raises it slightly against the spring, this is detected by the sensor. lift table 4
The rising movement of stops. After this, Screw 14
When the slide plate 16 and the pushing body 18 are rotated and propelled forward as shown in FIG. In this state, the wrapping sheet 8 is pushed forward. During this pushing, the top packaging sheet 8 and its 1
Since air is injected from the air nozzle 19 between the packaging sheet 8 on the lower tier, the packaging sheet 8 on the uppermost tier smoothly slides over the packaging sheet 8 on the lower tier. In addition, since the front surface 18a of the pushing body 18 is inclined as described above and is biased downward by the spring, the position of the rear end of the uppermost packaging sheet 8 is slightly shifted when the pushing body 18 is stopped. Even if it is misaligned or its thickness is different, the pushing body 18
When the protrusion 18b moves forward, the engagement between the protrusion 18b and the rear end of the packaging sheet 8 is performed accurately, and the engagement will not come off during the pushing movement.

The positioning pushing body 12 of the positioning mechanism is also mounted in the same manner as this pushing body 18, and an air nozzle is also attached thereto, and the pushing operation for positioning is performed in the same manner as described above.

Since the wamp discharge mechanism 10 operates in the final process, its configuration will be described later.

Next, the unsealing/conveying section 2 will be explained.

The uppermost packaging sheet 8, which has been pushed forward by the pushing body 18 as described above, is supported by the support rollers 20 that are horizontally suspended, and then is placed in a horizontal state. It is supported following the lower opening plate 21, and the front end collides with a front opening position stopper 22 protruding from the tip of the lower opening plate 21 and stops. While the wamp 7 is moving forward, the right and left side surfaces of the wamp 7 are automatically cut by the horizontally rotating disk-shaped left and right side cutters 23 as it moves forward. These side cutters 23 are individually rotated by cutter motors 24, and their positions do not move back and forth, but can be adjusted to the left and right at the same time by screw mechanisms 24a.
The packaging sheet 8, whose front end has been positioned by the front opening position stopper 22, is moved to the wamp 7 by a disc-shaped front cutter 26 that slides leftward or rightward along the cutter rail 25 while rotating horizontally. The entire length of the front side of the frame is cut off. A cutter motor 27 for rotating the front cutter 26 is attached to a cutter slider 28 mounted on the cutter rail 25, and the cutter slider 28 is slid by, for example, a chain drive.

When the front ends of the right and left sides and the entire front length of the wamp 7 are cut in this way, the plurality of lower suction cups 29 attached to the lower opening plate 21 and the plurality of upper suction cups attached to the upper opening plate 30 are cut. Air suction by the suction cups 31 starts, and the lower and upper surfaces of the wamp 7 are attracted to the upper surface of the lower opening plate 21 and the upper suction cup 31 by suction by these suction cups 29 and 31. The lower suction cup 29 is attached to the lower side of the lower opening plate 21 and faces the suction hole 32 as shown in FIG. The upper suction cup 31 is provided to protrude from the lower surface of the upper opening plate 30. The lower opening plate 21 has its left and right ends pivotally supported by a shaft 33, and is rotated up and down by a motor or cylinder (not shown), and the upper opening plate 30 is rotated up and down by the cylinder. Air injection needles 34 are fixedly disposed toward the front at a plurality of locations on the left and right sides slightly below the axis of the lower sealing plate 21, and air is injected from these.

When the wamp 7 is attracted as described above, the lower opening plate 21 rotates downward as shown by the chain line in FIG. 6, and the upper opening plate 30 rotates upward, so that the front end has already been cut. The wamp 7 is divided into upper and lower cut parts 7a and 7b along the cutting line, and is opened by turning both the upper and lower parts so that the front end is open and the sheets inside the wamp 7 are opened. The front end of 8a is exposed. At this time, the air injection needle 34 sticks into a plurality of left and right places of the lower cut portion 7b to be opened from the rear side, and injects air toward the front of the lower cut portion 7b. Also,
As the lower opening plate 21 rotates downward, the exposed front end of the sheet 8a curves and hangs downward from the support roller 20, and the front end and the lower cut portion of the wamp 7 7b, air is blown from the air injection needle 34.

A sheet of paper 8a with the front end hanging down like this
is lifted to a horizontal state by the L-shaped lifting piece 36 of the lifting mechanism 35 at its front end. At this time, since air is injected from the air injection needle 34 as described above, even if the front end of some of the lower sheets 8a is separated, it will not be affected by the air injection. Twisted and pushed up,
All of it will be lifted. The lifting piece 36 is
horizontal shaft 3 rotated by a motor or cylinder
It is fixed at multiple locations on the left and right sides of 6a. The sheet 8a whose front end has been lifted is extracted forward from the wamp 7 by the extraction mechanism 37 as described below, and placed on a gondola-shaped conveyance table 38.

The extraction mechanism 37 transmits the rotation of the extraction and conveyance motor 39 to the extraction screw 40 via the transmission mechanism, and the rotation of the screw 40 moves the clamp slide table 41 to the clamp rail 42 (the eighth (Fig.) Slide it back and forth. This clamp sliding table 41
A pair of upper and lower clamps 43 operated by a cylinder are attached to the clamp 43 as is conventionally known.

The conveyor table 38 has an upper frame portion 38 as shown in FIG.
a, left and right frame parts 38b hanging down from both left and right ends of the frame part 38b, and horizontal left and right placing parts 38c at the lower ends of the frame part 38b. The clamp 43 can pass through the cutout 38d between the portions 38c. Upper frame portion 38a of this conveyance table 38
The central portion of the sleeve 45 is connected to a sleeve 45 which is propelled by an unloading screw 44 parallel to the unloading screw 40, and the left and right frame portions 38b are guided by left and right conveyor rails 46. Air injection nozzles 47 that inject air toward each other inwardly are attached to the front ends of the left and right mounting portions 38c so that their positions can be adjusted. The rotation of the unloading/conveying motor 39 is also transmitted to the unloading screw 44 via the transmission mechanism.

The sheet 8 is lifted by the lifting piece 36 as described above.
When the front end of the sheet 8a is lifted, the clamp 43 is moved back by the sliding motion of the clamp slider 41, and after the sheet 8a is clamped vertically by the operation of the cylinder, the clamp 43 immediately moves forward. During this time,
Since the upper and lower cut portions 7a and 7b of the wamp 7 are continuously sucked by the suction cups 31 and 29 with their mouths open, the sheet 8a is pulled out from the wamp 7. During this extraction, the air injection needle 34 is inserted between the cut portion 7b on the lower side of the wamp 7 and the sheet 8a as described above.
Because more air is blown into these separations,
In other words, the sheet 8a is smoothly extracted.
The extracted sheet 8a is placed on the left and right placing portions 38c of the conveyance table 38, which is waiting at a predetermined position. When the clamp 43 advances to a predetermined position in the middle, the rotation of the extraction/conveyance motor 39 is also transmitted to the conveyance screw 44, and the conveyance table 38 advances at the same speed as the clamp 43, and the sheet 8a is unsealed and unsealed.
The materials are transported from the transport section 2 to the stacking/aligning section 3.

Next, to explain this stacking/aligning section 3, a stacking table 48 for stacking sheets 8a is suspended there by a chain 49 in the same way as the lift table 4 of the lifting/pushing section 1. held,
It is lifted and lowered in the same way. This stacking table 48 has a sensor that detects the stacking height of the sheets 8a stacked thereon, and changes the stacking height every time one layer of sheets 8a is stacked so that the height of the top surface of the stack is always constant. It will be lowered by the amount. This height (when no sheet 8a is loaded, the height of the loading table 48 itself) is the height of the loading section 3 of the conveyance table 38.
It is slightly lower than 8c so that there is a difference in level.

Further, a stopper 50 is rotatably mounted around a shaft 51 at the boundary between the loading/aligning section 3 and the unsealing/conveying section 2. The pivot position of this stopper 50 corresponds to the cutout 38d between the left and right placing parts 38c of the conveyance table 38. The stopper 50 is raised and lowered by a cylinder (not shown), and is normally laid down, but when raised, its free end becomes higher than the height of the mounting portion 38c.

The loading/preparing section 3 also includes a left-right aligning plate 52 that presses and aligns both left and right ends of the sheet 8a newly loaded on the loading table 48, and a stopper 50 that aligns the front end.
A front alignment plate 53 for pushing and alignment facing towards the guide rods is respectively mounted so as to be slid along the guide rod by a cylinder. Furthermore, left and right pushers 54 (FIG. 9) that push the right and left corners of the front end of the newly loaded uppermost sheet 8a from above are vertically movably suspended from the upper part of the stacking/aligning section 3. It is set up. These pushers 54 are moved up and down by cylinders.

When the conveyance platform 38 loaded with one stage of sheets 8a advances to a predetermined position above the loading table 48 as described above, the clamp 43 releases its grip, and the stopper 50 moves as shown in FIG. stands up. After this, the conveyance table 38 immediately retreats, but the rear end of the sheet 8a mounted on it collides with the stopper 50 and is restricted from following the retreat.
The pusher 54 is unloaded onto the sheets 8a already stacked on the loading table 48 from the front end, almost immediately when the conveyor 38 starts to move backward.
is lowered, and when only the front end of the sheet 8a has been unloaded, the left and right corners of the sheet 8a are moved to the pusher 54.
presses from above. Immediately after the pressing starts, the air injection nozzles 4 on both the left and right sides of the conveyor table 38
7, air is blown onto the left and right side surfaces of the sheet 8a being unloaded from the conveyor table 38. At this time, the height of the loading section 38c of the conveyance platform 38 is slightly higher than the loading top surface of the loading table 48.
Because there is a level difference between these, the sheet of paper that is being sold 8
A is bent by this step, and air is injected from the air inlet nozzle 47 to the bent portions on the left and right sides, so that air can be injected well between the sheets 8a. Since the bent portion moves rearward as the conveyor table 38 moves backward, air is injected over the entire length of both left and right sides of the sheet 8a.

When the conveyor table 38 retreats to the unpacking/conveying section 2,
After the pusher 54 has been raised, the front alignment plate 53 is propelled to align the newly loaded sheets 8a with the sheets slightly below it, and the left and right alignment plates 52 are also propelled to align these sheets. You can align the left and right positions with . Thereafter, the stopper 50 is laid down, and the clamp 43 is also returned to the unsealing/conveying section 2 and retreated.

While the stacking operation of the sheets 8a as described above is being carried out, the air injection needle 34 is
At the same time as the air injection stops, sheet 8
Wamp 7, which was empty after a was extracted as shown above.
is released from the suction by the suction cups 29 and 31, the upper opening plate 30 rotates downward and the lower opening plate 21 returns upward, and the air injection needle 34 is pulled out from the lower cut portion 7b of the wamp 7. put out

Thereafter, the empty wamp 7 is discharged in the raising/pushing section 1 by the wamp discharging mechanism 10 as follows.Finally, this wamp discharging mechanism 10 will be explained.

As shown in FIG. 4, a wamp return suction cup 55 is vertically provided on the sliding plate 16 on which the pushing body 18 is mounted so that it can be moved up and down by a cylinder 55a. Further, on the upper right side of the lifting/pushing part 1, there is a rotating frame 56 as shown in FIG.
is mounted so as to be movable up and down around a support shaft 57,
A plurality of rubber discharge belts 58 are attached to the rotary frame 56 in parallel so that they can circulate. The rotation frame 56 is rotated up and down by a cylinder 59, and the discharge belt 58 is circulated by a motor (not shown) via a pulley or the like mounted on a support shaft 57. A discharge guide plate 60 is installed slightly below the rotating frame 56.

The pushing body 18 that pushed the packaging sheet 8 toward the unsealing/conveying section 2 as described above moves forward until the empty wamp 7 is released from the suction cups 29 and 31 as described above, and then reaches the stopped position. Therefore, the sucker 55 for returning the wamp is also in this position. The wamp return suction cup 55 descends at this position and sucks the upper surface of the empty wamp 7, and then rises to lift the wamp 7 a little. Thereafter, the pushing body 18 retreats, and the empty wamp 7 is returned while being sucked by the suction cup 55. When the pushing body 18 retreats to its original position and stops, the suction of the suction cup 55 is released and the cylinder 59
is activated, the rotating frame 56 is rotated downward,
A discharge belt 58 is pressed against the upper surface of the wamp 7. At this time, since the discharge belt 58 is circulating, the empty wamp 7 is discharged to the left of the lifting/pushing section 1 while being guided on the discharge guide plate 60.

When the discharge is completed, the lift table 4 is raised by one stage of the packaging sheets 8 loaded thereon, and then the above series of operations is repeated.

"Effects of the Invention" As described above, according to the method of the present invention, the left and right sides of the packaging sheets are automatically moved forward one by one as if stacked in multiple stages, as if unloading. After stopping the advance and automatically cutting the front side, the packaging sheet is sucked and opened, and the sheet inside is extracted in that state, making the extraction efficient. can be done. At the same time as the sheet is extracted, the sheet is placed on a conveyor table, and after the conveyor table is advanced to the stacking position, it is moved backward and stacked while unloading the sheet, and at that time, air is blown into the sides of the sheet. Therefore, loading and paper handling by air pumping can be done efficiently.

Moreover, according to the apparatus of the present invention, the series of operations described above can be performed efficiently.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a simplified side view, FIG. 2 is a plan view, FIG. 3 is a rear view of the packaging sheet positioning mechanism and the wamp ejection mechanism, and FIG.
The figure is a perspective view of the pushing mechanism, FIG. 5 is a side view showing the wamp cutting operation, and FIG. 6 is a side view showing the opening operation.
FIG. 7 is a side view showing the sheet extraction operation, FIG. 8 is a front view of the conveyance table and clamp, and FIG. 9 is a side view showing the loading and air filling operations. 1... Lifting/pushing part, 2... Opening/conveying part, 3
...Loading/alignment section, 4...Lift table, 5...
...Chain, 6...Sprocket wheel, 7...
...Wamp (wrapping sheet), 7a, 7b...Wamp cutting part, 8...Wrapping sheet, 8a...Sheet, 9...Pushing mechanism, 9a...Pushing motor, 1
0... Wamp discharge mechanism, 11... Ruler plate, 11a
... Ruler adjustment mechanism, 12 ... Positioning pushing body,
13... Positioning screw, 13a... Positioning motor, 14... Pushing screw, 15
...Guide rod, 16...Sliding plate, 17...Rod, 18...Pushing body, 18a...Front surface of pushing body, 18b...Protrusion of pushing body, 19...Air nozzle, 20...Support roller , 21... lower opening plate, 22... stopper, 23... side cutter, 2
4... cutter motor, 24a... screw mechanism, 25
...Katsuta rail, 26...Front cutter, 27...
...Katsuta motor, 28...Katsuta sliding table, 29...
...Sucker, 30...Upper opening plate, 31...Sucker, 3
2... Suction hole, 33... Shaft, 34... Air injection needle, 35... Lifting mechanism, 36... Lifting piece, 36a... Horizontal shaft, 37... Extraction mechanism, 38...
...Conveyance table, 38a...Transportation table upper frame, 38b...
...Left and right frame portions of the conveyor table, 38c... Placement part of the conveyor table, 38d... Missing part of the conveyor table, 39... Motor for extracting and conveying, 40... Screw for extracting, 41
... Clamp sliding table, 42 ... Clamp rail,
43... Clamp, 44... Unloading screw,
45... Sleeve, 46... Transport platform rail, 47
...Air injection nozzle, 48...Loading table,
49...Chain, 50...Stoppa, 51...
Shaft, 52... Left and right alignment plate, 53... Front alignment plate, 5
4...Pushiya, 55...Wamp return suction cup, 5
5a... Cylinder, 56... Rotating frame, 57
...Support shaft, 58...Discharge belt, 59...Cylinder, 60...Discharge guide plate.

Claims (1)

[Scope of Claims] 1. A step of stacking packaging sheets wrapped in a predetermined number of layers with packaging sheets in multiple tiers and raising each tier to a predetermined height, and packaging while advancing one tier. A process of cutting the left and right sides of the sheet with a cutter, a process of stopping the forward movement and cutting the front side of the packaging sheet with a cutter, and a process of sucking the top and bottom surfaces of the cut packaging sheet and vertically moving the packaging sheet. The process of opening the package, the process of pinching and extracting the unsealed one-level sheets from the packaging sheet and placing them on a conveyance table, and the process of moving this conveyance table forward to the position where the one-level sheet of paper is stacked. A method for unsealing and stacking packaging sheets, comprising the steps of: after transporting the sheets to a certain level, blowing air to the sides of the sheets, the transport table is moved backward, and the sheets are stacked while being unloaded from there. 2. A lift table that stacks a predetermined number of wrapped packaging sheets in multiple stages and raises each stage to a predetermined height, and a push mechanism that pushes the rear end of the top stage to advance it. , left and right side cutters that cut the left and right sides of the packaging sheet as it moves forward; a front cutter that slides along the rail to cut the front side of the packaging sheet after it stops advancing; and the top and bottom sides of the cut packaging sheet. An upper and lower opening mechanism that sucks the bottom surface and moves upward and downward, respectively, an extraction mechanism that clamps one stack of opened sheets with a clamp and extracts them from the packaging sheet, and a loading table that can be raised and lowered. a conveyance platform that loads the extracted sheets, moves forward to the loading table, and then moves backward to load the sheets onto the loading table; and the sheets to be loaded thereon. A packaging sheet comprising: an air inlet mechanism attached to a conveyance table for blowing air into the side surface of the sheet; and a stopper for regulating the retreat of the sheet when the conveyance table is retracted. Open stacking device.