JPS63208442A - Opening device for packed paper sheets - Google Patents

Abstract

PURPOSE:To open packed sheets automatically and efficiently by cutting automatically the right and left sides and the front side of a sheet package, separating and opening the package into upper and lower portions via suction cups, injecting air into the lower portion with an air injection needle inserted therein and taking out all sheets held with a clamp. CONSTITUTION:While packed sheets 8 for stacking in a multi-tier are made to advance tier by tier with the pusher 18 of a pushing mechanism, both right and left sides of the packing paper 7 thereof are automatically cut, and the front side is automatically cut, while the advance of the packed sheets 8 is interrupted. Thereafter, the packing paper 7 is separated into upper and lower portions via adsorption with suction cups 31 and 29 for opening. Then, an air injection needle 34 is inserted in the lower portion 7b in a separation process, air is injected therefrom for pushing out the sheets 8 from the lower side thereof, a clamp 43 is operated to prevent the sheets 8 from separation and hold the sheets 8 properly and the sheets 8 are smoothly taken out from a package. Therefore, unpacking work can be carried out automatically and efficiently.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is a method for automatically unsealing 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 sheet opening device.

``Prior art'' 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 in bundles. 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 attempts to solve] Therefore, it required a lot of labor and was inefficient.

The purpose of the present invention is to automatically and efficiently carry out the unpacking work, which was conventionally done manually, and to allow the unsealed sheets to be pulled out smoothly and accurately. shall be.

"Means for Solving the Problems" In order to achieve this objective, the unsealing device of the present invention stacks packaging sheets wrapped in a predetermined number of layers with packaging sheets in multiple stages, and A lift table that lifts to a predetermined height, a push mechanism that pushes the rear end of the top stage to advance, a left and right side cutter that cuts the left and right sides of the packaging sheet as it advances, and a front side cutter that cuts the left and right sides of the packaging sheet after it stops advancing. A front cutter that cuts the cut packaging sheet, an opening mechanism that sucks the top and bottom surfaces of the cut packaging sheet, separates it into upper and lower parts, and opens the packaging sheet. The device is equipped with an air injection needle and an extraction mechanism that clamps and extracts one stack of unsealed sheets with a clamp.

According to the device of the present invention, packaging sheets stacked in multiple stages are raised one stage at a time, and only the two-most stage is advanced by the pushing mechanism, and as it advances, the packaging sheets are Both left and right sides are automatically cut. 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 the packaging sheet is separated into upper and lower parts and opened. At this time,
The air injection needle sticks into the separated lower part,
Air is injected between the lower portion and the exposed sheet of paper to press the sheet of paper from below with air pressure, thereby preventing the sheet of paper from fraying. In this state, the sheet is held between clamps and pulled out from the packaging sheet. At this time, since air is injected as described above, separation of the packaging sheet and the sheet of paper is performed smoothly.

"Example" An example of the present invention will be described below in detail 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 chains 5 on the lifting/pushing part 1.
is the sprocket wheel 6 that is meshing with the chain 5
When it is rotated by the mortar, it is raised while remaining horizontal. Packaging sheets 8 wrapped in packaging sheets, for example, wamps 7 (FIG. 6), are loaded onto the lift table 4 by a forklift or the like while being stacked in multiple stages on a valet.

The lifting/pushing part l 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 part 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 that adjusts its position, a plurality of positioning pushing bodies 12 on the left side, and a positioning screw that propels it to the right. 13 and a positioning motor 13a that rotates the same, and a pushing body 12 pushes the left end of the uppermost packaging sheet 8 to bring its right end into contact with a ruler plate 11 for positioning.

The pushing mechanism 9 includes a pushing motor 9a as shown in FIG.
(Fig. 1.2), a sliding plate 16 that is screwed together with the pushing screw 14 and slides back and forth along the guide rod 15 due to its rotation, and the sliding plate 1
6 and a plurality of pushing bodies 18 which are vertically slidably installed by rods 17.

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.

15= When the lift table 4 rises and the rear end of the uppermost packaging sheet 8 collides with the front surface 18a of the pushing body 18 and raises it slightly against the spring, this is detected by the sensor. , the lifting operation of the lift table 4 is stopped. Thereafter, when the screw 14 rotates and the sliding plate 16 and the pushing body 18 are propelled forward as shown in FIG. The packaging sheet 8 is pushed forward while being in contact with the rear end. During this pushing, air is injected from the air nozzle 19 between the packaging sheet 8 on the top tier and the packaging sheet 8 one tier below it, so the packaging sheet 8 on the top tier is It slides smoothly on the packaging sheet 8 at the bottom of the tier. Further, 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 top packaging sheet 8 may shift slightly when the pushing body 18 stops. Even if the pushing body 18 moves forward, the protrusion 18b and the rear end of the packaging sheet 8 will be accurately engaged, and even if the pushing body 18 moves forward, the engagement between the protrusion 18b and the rear end of the packaging sheet 8 will be achieved accurately. It will not come off during movement.

The positioning pusher 12 of the positioning mechanism is also mounted in the same manner as the pusher 18, and an air nozzle is also attached thereto, and the push 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 top packaging sheet 8 that 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 under the horizontally long sheet that is in the horizontal state. The lower opening plate 21 is supported following the side opening plate 21.
The front end collides with a front opening position stopper 22 protruding from the front end of the bag 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 each rotated individually by a cutter motor 24, and although their positions do not move back and forth, they can be simultaneously adjusted in position left and right by a flipping mechanism 24a. The packaging sheet 8, whose front end is positioned by the front opening position stopper 22, is moved along the entire front surface of the wamp 7 by a disc-shaped front cutter 26 that slides left or right along the cutter rail 25 while rotating horizontally. is cut off. A cutter motor 27 that rotates the front cutter 26 is attached to a cutter slide 28 mounted on the cutter rail 25, and the cutter slide 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 opening 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. Is the wamp 7 cut above and below the cutting line? a
, 7b and are opened by turning them both upward and downward, and the front end becomes open, and the front end of the sheet 8a in the wamp 7 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, the exposed sheet 8a
As the lower opening plate 21 rotates downward, the front end of the
It is curved and hangs downward from the support roller 20, and air is blown from the air injection needle 34 between the front end and the lower cut portion 7b of the wamp 7.

The sheet 8a with its front end hanging down in this manner is lifted to a horizontal state by the L-shaped lifting piece 36 of the lifting mechanism 35. At this time, since air is being injected from the air injection needle 34 as described above, even if the front end of some of the lower sheets 8a is loose, it will not be caused by the air injection. It will be pushed up and all of it will be lifted up. The lifting pieces 36 are fixed to a plurality of positions on the left and right sides of a horizontal shaft 36a that is rotated by a motor or a cylinder. The sheet 8a whose front end has been lifted is extracted forward from the wamp 7 by the extraction mechanism 37 as follows, 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 (FIG. 8). Slide it back and forth along the A pair of upper and lower clamps 43 operated by cylinders are mounted on this clamp sliding table 41 as is conventionally known.

As shown in FIG. 8, the conveyance table 38 is composed of an upper part 38a, left and right frame parts 38b hanging down from both left and right ends of the upper part 38a, and horizontal left and right placing parts 38c at the lower end thereof, and the above-mentioned extraction mechanism is installed inside these parts. 37 clamp sliding bases 41 and the clamp 43 can pass through the cutout 38d between the left and right mounting parts 38c. The center portion of the upper frame portion 38a of this conveyance table 38 is connected to a sleeve 45 that is parallel to the extraction screw 40 (propelled by the squeezing screw 44), and the left and right frame portions 38b are connected to the left and right conveyor rails. 46. At the front ends of the left and right placing parts 38c, air inlet nozzles 47 that inject air inwardly are attached so that their positions can be adjusted. Transport motor 3
9 rotation is transmitted via the transmission mechanism.

When the front end of the sheet 8a is lifted by the lifting piece 36 as described above, the clamp 43 is moved back by sliding of the clamp sliding base 41, and after the sheet 8a is clamped vertically by the operation of the cylinder, The clamp 43 immediately advances. During this time, the upper and lower cut parts 7a and 7b of the wamp 7
Since the sheet 8a is continuously sucked by the suction cups 31 and 29 with its white open, the sheet 8a is extracted from the wamp 7. During this extraction, air is blown from the air injection needle 34 between the cut portion 7b on the lower side of the wamp 7 and the sheet 8a as described above. Extraction is carried out smoothly. The extracted sheet 8a is
The left and right loading sections 38 of the transport platform 38 are waiting at a predetermined position.
It is mounted on c. 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 moves to the clamp 43.
The sheets 8a are transported from the unsealing/transporting section 2 to the stacking/aligning section 3.

Next, to explain this stacking/aligning section 3, there is a stacking table 48 for stacking sheets 8a.
It is suspended by a chain 49 in the same way as the lift table 4 of the lifting/pushing section 1, and is raised and lowered in the same manner. 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 tall sheet of paper 8a
When no paper is loaded, the height of the stacking table 48 itself is slightly lower than the height of the stacking table 48 so as to create a step between it and the loading section 38c of the transport platform 38.

In addition, at the boundary between the loading/aligning section 3 and the unpacking/conveying section 2,
A stopper 50 is rotatably mounted around a shaft 51. The pivot position of this stopper 50 corresponds to the missing portion 38d between the left and right placing portions 38c of the Ill feeder 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 for pushing and aligning both left and right ends of sheets 8a newly stacked on the stacking table 48, and a front aligning plate 53 for pushing and aligning the front ends toward the stopper 50. , are each mounted so as to be slid along the guide rod by a cylinder. Furthermore, left and right pushers 54 (FIG. 9) that push the left and right corners of the front end of the newly stacked top sheet 8a from above are vertically movably suspended above the stacking/aligning section 3. It is set up. These buttons 54 are moved up and down by cylinders.

As mentioned above, the conveyance platform 38 carries one stage of sheets 8a.
advances to a predetermined position above the loading table 48,
When the clamp 43 releases its grip, the stopper 50 stands up as shown in FIG.

After that, the conveyance table 38 immediately retreats, but the trailing end of the sheet 8a mounted on it collides with the stopper 50 and is restricted from following the retreat, so that the sheets 8a already loaded on the loading table 48 The paper is unloaded onto the paper 8a from the front end. Almost at the same time as the conveyor table 38 begins to move backward, the pusher 54 descends, and when only the front end of the sheet 8a has been unloaded, the pusher 54 presses the right and left corners of the sheet 8a from above. Immediately after the pressing started, the conveyor table 38
Air is injected from the air inlet nozzles 47 on both the left and right sides, and 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 conveyor table 38 is a little higher than the top surface of the loading table 48, and there is a step between them, so the sheet 8a to be unloaded is bent by this step, and the sheet 8a is bent from side to side. Since air is injected from the air inlet nozzle 47 to the bent portion of the side surface, air can be injected between the sheets of leaf IE 8a well. Since the bent portion moves rearward as the conveyor table 38 moves backward, the air is inflated over the entire length of both left and right sides of the sheet 8a.

When the conveyor table 38 retreats to the unsealing/conveying section 2, the pusher 54 rises, and the front alignment plate 53 is propelled to move the newly loaded sheet 8a along with the sheet slightly below it to the front and rear positions. The left and right alignment plates 52 are moved to align the left and right positions. After this, stopper 50
is laid down, and the clamp 43 also returns to the unsealing/conveying section 2 and retreats.

While the stacking operation of the sheets 8a as described above is being carried out for -14=, the air injection by the air injection needle 34 is stopped in the unpacking/conveying section 2, and the sheet 8a is pulled out as described above. The ejected and empty wamp 7 is released from the suction by the suction cups 29 and 31, and the upper opening plate 30 moves downward and the lower opening plate 21 returns upward, and the air injection needle 34
is extracted from the lower cut portion 7b of the wamp 7.

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, as shown in FIG. 3, a rotating frame 56 is mounted on the upper right side of the lifting/pushing unit 1 so as to be movable up and down about a support shaft 57. Rubber discharge healds 58 are mounted in parallel for circulation. The rotation frame 56 is rotated up and down by a cylinder 59, and the discharge heald 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 the empty wamp 7 to the suction cup 29 as described above.
．． Until it is released from 31, it remains in the forward and stopped position, and therefore the wamp return suction cup 55 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 cup 5
5 is released, the cylinder 59 is activated, the rotation frame 56 is rotated downward, and the ejection belt 58 is moved to the wamp 7.
is pressed against the top surface of the At that time, this discharge heald 5
Since the pump 8 is circulating, the empty pump 7 is connected to the discharge guide plate 60.
It is discharged to the left of the lifting/pushing part 1 while being guided above.

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 present invention, the left and right sides of the packaging sheets are moved forward one by one by the pushing mechanism as if stacked in multiple stages to be unloaded. After automatically cutting the paper and stopping its advance and automatically cutting the front side, it adsorbs the packaging sheet and separates it into upper and lower parts, opens the package, and in this state extracts the sheets inside. , the extraction can be done efficiently. In addition, an air injection needle is inserted into the lower part of the packaging sheet that is separated as described in item 1, and air is injected between the lower part and the exposed sheet to separate the sheets from below. Since it is pressed with air pressure, it is possible to prevent the sheets from coming apart, and all the sheets can be accurately clamped with the clamp, and the packaging sheet and the sheets can be separated smoothly.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being 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, Fig. 4 is a perspective view of the pushing mechanism, Fig. 5 is a side view showing the wamp cutting operation, and Fig. 5 is a side view showing the wamp cutting operation. Figure 6 is a side view showing the opening operation, Figure 7 is a side view showing the sheet removal operation, Figure 8 is a front view of the conveyor table and clamp, and Figure 9 is a side view showing the loading and air filling operation. It is. 1... Lifting/pushing section, 2... Unpacking/conveying section, 3... Loading/aligning section, 4... Lift table, 5... ...Chain, 6...
・Sprocket wheel, 7... Wamp (wrapping sheet), 7a, 7b... Cutting part of the wamp,
8... Packaging sheet, 8a... Sheet,
9...Pushing mechanism, 9a...Pushing motor, 10...Wamp discharge mechanism, 11...
・Ruler plate, lla... Ruler adjustment mechanism, 12...
...Pushing body for positioning, 13...Screw for positioning, 13a...Motor for positioning,
14...Pushing screw, 15...
Guide rod, 16...Sliding plate, 17...
...Rod, 18...Pushing body, 18a...
...Front surface of the pushing body, 18b...Protrusion of the pushing body,
19...Air nozzle, 20...Support roller, 21...Lower opening plate, 22...
・Stopper, 23...Side cutter, 24...
... Cutter motor, 24a ... Screw mechanism, 2
5...Cutter rail, 26...Front cutter, 27...Cutter motor, 28...
・Cutter sliding base, 29... Suction cup, 30...
・・Upper opening plate, 31・・Suction cup, 32・・・・
...Suction hole, 33...Shaft, 34...Air injection needle, 35...Lifting mechanism, 36...
...Lifting piece, 36a...Horizontal shaft, 37.
...Extraction mechanism, 38...Transportation platform, 38a
...... Upper frame of the transport table, ~18-38b... Left and right frame parts of the transport table, 38c...
... Placement part of the transfer table, 38d... Missing part of the transfer table, 39... Extraction/conveyance motor, 40...
...Extraction screw, 41...Clamp sliding base, 42...Clamp rail, 43...
・・Clamp, 44・・・・1 Screw for public use,
45...Sleeve, 46...Transfer platform rail, 47...Air injection nozzle, 48...
...Loading table, 49...Chain, 50
...Stopper, 51...Axis, 52...
...Left and right alignment board, 53...Front alignment board, 54
...Butsusha, 55...Wamp return suction cup, 55a...Cylinder, 56...
Rotating frame, 57...Support shaft, 58...
...Discharge heald, 59...Cylinder, 60...
...Discharge guide board.

Claims (1)

[Claims] 1. 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 cuts the front side of the packaging sheet after it stops advancing, and a front cutter that adsorbs the top and bottom surfaces of the cut packaging sheet and separates it into upper and lower parts. An opening mechanism that opens the package, an air injection needle located at a position that pierces the lower part of the packaging sheet that is separated when the package is opened, and a clamp that holds the unsealed sheet for one layer. 1. An unsealing device for packaging sheets, characterized by being equipped with an ejecting mechanism for pinching and ejecting sheets.