JP4182773B2 - Method and apparatus for expanding a tubular corrugated cardboard case - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for expanding a tubular cardboard case in a cylindrical manner and an apparatus therefor, which are performed prior to the bottom sticking of a cardboard case and the subsequent automatic packaging of goods.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been proposed an automatic bottom pasting device that expands a folded cardboard case into a cylindrical shape, subsequently performs bottom pasting, and then supplies the bottom pasting completed cardboard case to an automatic packaging device or the like.
[0003]
[Patent Literature]
Japanese Utility Model Publication No. 48-38499 Japanese Patent Publication No. Sho 51-34353
[Problems to be solved by the invention]
In the automatic bottom pasting device, the folded cardboard case is expanded into a cylindrical shape and supplied to the bottom pasting device.
[0005]
In the step of expanding the folded cardboard case into a cylindrical shape, if the folded pieces of the cardboard case are in close contact, the expansion into the cylindrical shape may not be performed smoothly. Such a phenomenon was significant when the folded state was suddenly expanded from the folded state due to the high-speed bottom sticking process.
[0006]
The cause is thought to be because each piece of the folded corrugated cardboard case is in a close contact state, so that a state close to vacuum occurs between the pieces when expanding into a cylindrical shape, and they are in an adsorbed state. . However, the effects of contact pressure and static electricity were also considered. As described above, if the expansion into the cylindrical shape is not performed smoothly, damage to the expansion device into the cylindrical shape, the subsequent bottom flap folding device, and the bottom sticking device, and other various troubles may be caused. It was a thing.
[0007]
The present invention has been made in view of the above circumstances, and can smoothly expand the folded corrugated cardboard case into a cylindrical shape. Therefore, the cylindrical expanding device and the subsequent bottom flap folding It is an object of the present invention to provide a method and an apparatus that can prevent damage to the apparatus, and further, a bottom sticking apparatus and other various troubles.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the method of the first aspect of the present invention, the folded corrugated cardboard case is intermittently transported by a transport device provided in parallel at an interval, and when the transport is stopped, the first suction cup is adsorbed to the lower rear piece. And a second suction cup is adsorbed on the rear piece on the upper surface, the second suction cup is erected and rotated from a horizontal position to a vertical position, and the folding corrugated cardboard case is expanded in a cylindrical shape. This is a method for expanding a folded corrugated cardboard case in a tubular manner, characterized in that the standing rotation from the horizontal position to the vertical position is performed slowly and then quickly at the start of the standing rotation.
[0009]
According to the method of the present invention, the suction of the first sucker to the lower rear piece of the folded cardboard case and the adsorption of the second sucker to the upper rear piece of the folded cardboard case are quick. To be done.
[0010]
On the other hand, when the folding corrugated cardboard case is expanded into a cylindrical shape, the speed of the second sucker adsorbed on the upper rear piece of the corrugated cardboard case is changed during the standing rotation from the horizontal position to the vertical position. It is done.
[0011]
That is, in the method of the present invention, the upright pivot from the horizontal position to the vertical position of the second sucker, that at the start standing rotation is performed slowly in the operation of the cam mechanism, followed by a cylinder with said cam mechanism It is done quickly by operating . It said second suction cup Thus, instantaneously slow to do is the velocity at the start of the standing pivot, allowing the pieces entering the air in the cardboard case folded in close contact, each pieces This is because the adsorption state is eliminated and the expansion into the cylindrical shape is performed reliably.
[0012]
The invention of the apparatus of claim 2 is an intermittent conveying device for folding cardboard cases provided in parallel at intervals, and a lower back piece of the folding cardboard case which is provided below the intermittent conveying device so as to be vertically movable and conveyed. A first sucker that can be adsorbed, a second sucker that is adsorbed to a rear piece on the upper surface of the folded cardboard case that is conveyed simultaneously with the adsorption of the first sucker, and is raised from a horizontal position to a vertical position; 2 sucker upright pivot start line Ukamu mechanism to the vertical position, that thereafter together operate as the cam mechanism comprises a second suction cup the row cormorants cylinder orthostatic pivoting in the vertical position It is the cylindrical expansion apparatus of the folding cardboard case characterized.
[0013]
According to the apparatus of the second aspect, the method of the first aspect can be easily and reliably implemented. That is, the suction of the second suction cup to the upper rear piece on the folding cardboard case can be quickly performed by causing the cam mechanism to cooperate with the cylinder.
[0014]
Next, when the folding corrugated cardboard case starts to expand into a cylindrical shape, the second suction cup is instantly and slowly rotated from the horizontal position to the vertical direction at the timing of the cam mechanism without operating the cylinder. After that, the second suction cup can be quickly erected from the horizontal direction to the vertical direction by operating the cylinder in synchronism with the timing of the return by the cam mechanism. Therefore, as described in the method invention, air is allowed to enter between the pieces of the folding cardboard case that expands, the adsorption state between the pieces is eliminated, and the expansion into the cylindrical shape is performed smoothly. Can do.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the main part of an automatic bottom pasting device for corrugated cardboard cases, FIG. 2 is a side view mainly showing a cylindrical expanding portion, a bottom flap folding portion and a bottom pasting device portion of the corrugated cardboard case automatic bottom pasting device. 3 is a plan view of the main part of the corrugated cardboard case automatic bottom pasting device, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 1, and FIG.
[0016]
1 to 3, reference numeral 1 denotes a magazine portion in which folded cardboard cases C are superposed and stored. In the figure, 2 is a shutter for supplying one block of the folded cardboard case C from above the magazine 1, and 3 is one block of the cardboard case folded to the shutter 2, although details are not shown. It is the lifter part to supply.
[0017]
The magazine portion 1 in which the folded cardboard case C is superposed and stored has a lower end portion serving as a take-out port of the folded cardboard case C, and a locking pin 4 provided in the take-out port has The folded cardboard case C at the lowermost end is locked.
[0018]
Then, the folded cardboard case C at the lowermost end of the magazine portion 1 is taken out by a suction cup 5 provided below the magazine portion 1 so as to freely move up and down, and is placed on a conveyance path 6 composed of a chain provided at an interval. Supplied and conveyed to the cylindrical expansion part 7, the bottom flap folding part 7 a and the bottom sticking device 8.
[0019]
That is, the suction cup 5 is supported at the tip of the piston rod 10 of the cylinder 9, and the cylinder 9 and the piston rod 10 can advance and return toward the folded cardboard case C by the cam mechanism 11, that is, move up and down. It is supported freely.
[0020]
Specifically, as shown in FIG. 1, a plurality of guide rods 12 are raised below the magazine portion 1, and a slider 13 is fitted to the guide rods 12 so as to be movable up and down. Next, the cylinder 9 is supported on the slider 13 with the piston rod 10 and the suction cup 5 facing upward. In the illustrated embodiment, a horizontal support plate 14 is connected to the tip of the piston rod 10, and a plurality of suction cups 5 are provided on the horizontal support plate 14.
[0021]
On the other hand, the cam mechanism 11 has a cam 15 composed of a large-diameter portion 15a and a small-diameter portion 15b, a rear end pivotally supported by the machine body 16, a front end engaged with the slider 13, and an intermediate portion interposed between the cam 15 and the cam 15. It is comprised by the rocking | fluctuation rod 17 engaged with.
[0022]
In the above-described configuration, the suction cup 5 is attracted to the folding cardboard case C in a timely manner in accordance with the timing of the cam mechanism 11 and the driving of the cylinder 9.
[0023]
That is, the cylinder 9 is driven in synchronism with the upward movement of the slider 13 and the cylinder 9 due to the engagement of the large-diameter portion 15a and the intermediate portion of the swing rod 17 as the cam 15 rotates. As a result, the advancement of the piston rod 10 performed with the upward movement of the cylinder 9 raises the suction cup 5 provided at the tip of the piston rod 10, and the suction cup 5 is attracted to the folded cardboard case C. Done quickly.
[0024]
Next, a preferred removal of the folded cardboard case C adsorbed by the suction cup 5 will be described. That is, when the folding cardboard case C is taken out, the suction cup 5 is returned instantaneously slowly and then quickly.
[0025]
Specifically, the suction cup 5 is attracted to the folded cardboard case C and the cylinder 9 is driven, that is, the piston rod 10 of the cylinder 9 is advanced, The integrated slider 13 is momentarily slowly lowered only by the cam mechanism 11, and the suction cup 5 at the tip of the piston rod 10 slowly removes the folded cardboard case C from the magazine portion 1.
[0026]
That is, when the suction cup 5 starts to be restored, the driving of the cylinder 9 is stopped, and the slider 13 is engaged by the engagement of the small diameter portion 15b of the cam 15 and the intermediate portion of the swinging rod 17 as the cam 15 rotates. And only by the downward movement of the cylinder 9, the suction cup 5 provided at the tip of the piston rod 10 of the cylinder 9 is slowly lowered, and the folded cardboard case C is slowly taken out from the magazine portion 1. .
[0027]
As a result, the air intrusion time is secured between the folded folded cardboard case C and the next folded cardboard case C, and the adsorbed state between the folded folded cardboard cases C is eliminated and prevented.
[0028]
Thereafter, the cylinder 9 is driven in synchronization with the lowering of the suction cup 5 and the cylinder 9 by the cam mechanism 11, and is supported at the tip of the piston rod 10 as the piston rod 10 of the cylinder 9 returns. The sucker 5 thus made is quickly returned, and the folded cardboard case C taken out from the magazine portion 1 is quickly supplied onto the transport path 6.
[0029]
Thereafter, the folded cardboard case C supplied onto the transport path 6 is intermittently transported by the transport devices 18 and 18a composed of chains provided in parallel with a space therebetween, and reaches the cylindrical expansion portion 7. . And it expands in a cylinder shape with the cylindrical expansion method and its apparatus of this invention.
[0030]
First, as shown in FIGS. 1 and 5, a first suction cup 19 is provided on the lower surface rear piece C1 when the intermittently conveyed folded cardboard case C is stopped. The suction cup 19 is raised by the cam mechanism 20. The cam mechanism 20 has a cam 21 composed of a large-diameter portion 21a and a small-diameter portion 21b, a rear end pivotally supported by the airframe 16, and a first suction cup 19 at the front end. The swing bar 22 is engaged with the cam 21.
[0031]
Further, a second suction cup 23 is provided which adsorbs to the rear piece C2 on the upper surface when the conveyance of the folded cardboard case C which has been intermittently conveyed is stopped and rises and rotates from the horizontal position to the vertical position.
[0032]
As shown in FIG. 4, the second suction cup 23 is provided from the side of the transfer devices 18, 18, and as shown in FIGS. 2 and 5, the cam mechanism 24 and a cylinder that is moved up and down by the cam mechanism 24. 25 and the bent rotation lever 26 are configured to stand upright from the same horizontal position as the conveyance path 6. The cam mechanism 24 includes a cam 27 having a large-diameter portion 27a and a small-diameter portion 27b, and a swing rod having a rear end pivotally supported by the machine body 16 and an intermediate portion engaged with the cam 27. 28, and the cylinder 25 is supported at the tip thereof.
[0033]
Further, one end of the rotating lever 26 bent with the substantially intermediate portion as a fulcrum 30 is pivotally supported at the tip of a piston rod 29 of the cylinder 25 that is moved up and down by the cam mechanism 24. The second suction cup 23 is provided at the other end of 26.
[0034]
In the above configuration, the second suction cup 23 is erected from the same horizontal position as the transfer path 6 to the vertical position by the control of the cam mechanism 24 and the cylinder 25 moved up and down by the cam mechanism 24. It is configured.
[0035]
In the present invention, the suction to the lower back piece C1 of the folding cardboard case C by the first sucker 19 is performed by the cam mechanism 20, and the upper back piece C2 of the folding cardboard case C by the second sucker 23. Adsorption is quickly performed by the cam mechanism 24 and the cylinder 25.
[0036]
That is, the suction of the first sucker 19 to the lower back piece C1 of the folded cardboard case C is quickly performed by the tip end of the swinging bar 22 being lifted by the large diameter portion 21a of the cam 21.
[0037]
Further, the suction of the second suction cup 23 with respect to the upper rear piece C2 of the folding cardboard case C, which is performed almost simultaneously with the suction of the first suction cup 19, is performed by the swing rod 28 by the small diameter portion 27b of the cam 27. As the tip of the cylinder 25 is lowered, the cylinder 25 is lowered and the cylinder 25 is operated, that is, the piston rod 29 of the cylinder 25 is returned.
[0038]
In the present invention, the upright rotation from the horizontal position to the vertical position where the second suction cup 23 is attracted to C2 on the rear upper surface piece of the folded cardboard case C is performed slowly and slowly at the start of the upright rotation, This is followed quickly. That is, when the second suction cup 23 starts to stand up and rotate from the horizontal position to the vertical position, the operation of the cylinder 25 is stopped, and the large-diameter portion 27ba of the cam 27 and the rocking motion are caused by the rotation of the cam 27. This is performed only by the upward movement of the cylinder 25 by the engagement of the intermediate portion of the moving rod 28. Accordingly, the second suction cup 23 provided at the tip of the rotation lever 26 is slowly started to start to rotate.
[0039]
As described above, the slow upright rotation of the second suction cup 23 by the cam mechanism 24 allows air to enter between the pieces of the folding cardboard case C that expands, thereby eliminating the adsorption state between the pieces. Then, smooth expansion into a cylindrical shape.
[0040]
Thereafter, when the cylinder 25 moved upward by the cam mechanism 24 is operated, the piston rod 29 of the cylinder 25 is advanced, and one end of the rotating lever 26 is rapidly raised, The provided second sucker 23 is quickly raised and rotated to a vertical position, and the folded cardboard case C is expanded in a cylindrical shape.
[0041]
Next, in the corrugated cardboard case expanded in a cylindrical shape, the cylindrical expanded state is maintained by the both-end flap presser 31 and the upper surface thereof is pressed by the upper conveying devices 32 and 32a formed of chains to keep the cylindrical shape. It is conveyed to the bottom sticking device 8.
[0042]
In the bottom sticking device 8, first, both bottom inner flaps are folded by the folding device 33, and then both bottom outer flaps are folded by the folding device 34.
[0043]
In the process of folding the bottom outer flaps, hot melt adhesive is applied to the gun by 35 on the outer surfaces of the bottom inner flaps. Thereafter, the bottom flap is pressed and complete bottom sticking is performed.
[0044]
The press of the bottom flap portion and the complete bottom sticking are then provided at a position facing the press plate 37, a press plate 37 that advances and returns by a cylinder 36 positioned outside the bottom flap, and the expansion This is performed by a press plate 39 that advances and returns to the inside of the molded cardboard case by a cylinder 38. In the embodiment of the drawings, the bottom flap press is configured to simultaneously perform two cardboard cases. In the figure, reference numeral 40 denotes a positioning device at the time of pressing the bottom flap.
[0045]
The corrugated cardboard case that has completed the bottom sticking as described above is, for example, transported rearward from the press portion, and then the opening portion is pressed by the pusher 41, and the opening portion is formed on the conveyor 42 that is configured at a lower position. Is raised, and conveyed to the next automatic product packaging device or the like (not shown).
[0046]
【The invention's effect】
According to the method of the present invention, the folding corrugated cardboard case can be smoothly expanded into a cylindrical shape, so that subsequent damage to each device and various other troubles can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of an essential part of a cardboard case automatic bottom pasting apparatus.
FIG. 2 is a side view mainly showing a spreading device portion, a bottom flap folding portion, and a bottom sticking portion of the automatic cardboard case bottom sticking device.
FIG. 3 is a plan view of an essential part of the corrugated cardboard case automatic bottom pasting device.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a side view showing a tubular expanded state of the folded cardboard case.
[Explanation of symbols]
18, 18a Conveying device 19 First sucker 23 Second sucker 24 Cam mechanism 25 Cylinder

Claims (2)

The folded corrugated cardboard case is intermittently conveyed by a conveying device provided in parallel with a gap, and when the conveyance is stopped, the first sucker is adsorbed on the lower back piece and the second sucker is adsorbed on the upper rear piece, and the second Is a method of expanding the folding corrugated cardboard case into a cylindrical shape by raising and lowering the suction cup from a horizontal position to a vertical position, and for raising the second suction cup from the horizontal position to the vertical position. at the beginning the dynamic instantaneous slowly performed by operating the cam mechanism, followed by a cylindrical expansion method of folding corrugated board characterized quickly be performed by operating the cylinder with the cam mechanism. Folding cardboard case intermittent conveyance device provided in parallel with a gap, a first suction cup that can be adsorbed to the lower rear piece of the folding cardboard case that is provided and moved vertically below the intermittent conveyance device, A second sucker that is sucked to the upper rear piece of the folded corrugated cardboard case conveyed at the same time as the suction of the first sucker and is erected and rotated from a horizontal position to a vertical position; start standing pivot line Ukamu mechanism, then the cam mechanism are both operated to cylindrical folding corrugated board, characterized in that it comprises a second suction cup the row cormorants cylinder orthostatic pivoting in the vertical position Spreading device.

Images