JP2004250052A - Method and apparatus for expanding folding corrugated fiberboard case into tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly expand a folded corrugated fiberboard case into a tube, and to prevent subsequent damage to a base flap folding device and further to a base pasting device or the like, and other various kinds of troubles. <P>SOLUTION: The method of expanding a folding corrugated fiberboard case C into a tube includes steps of intermittently carrying folding corrugated fiberboard cases C by conveyers provided in parallel with intervals, causing a first suction disk 19 to suck a lower surface rear piece C1, causing a second suction disk 23 to suck an upper surface rare surface C2, and rising and rotating the second suction disk 23 from a horizontal position to a vertical position to expand the case C into a tube. The second suction disk 23 is raised and rotated from the horizontal position to the vertical position slowly at a moment when the rising and rotating start and then quickly. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and a device for expanding a folded corrugated cardboard case, which is performed prior to the bottom sticking of the corrugated cardboard case and the subsequent automatic packaging of the product.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been proposed an automatic bottom sticking apparatus in which a folded cardboard case is expanded into a cylindrical shape, the bottom is stuck, and then the bottom stuck cardboard case is supplied to an automatic packaging apparatus or the like.
[0003]
[Patent Document]
JP-B-48-38499, JP-B-51-34353, [0004]
[Problems to be solved by the invention]
In the automatic bottom sticking apparatus, the folded corrugated cardboard case is expanded into a cylindrical shape and supplied to the bottom sticking apparatus.
[0005]
In the step of expanding the folded cardboard case into a cylindrical shape, if the pieces of the folded cardboard case are in close contact with each other, the cylindrical shape may not be smoothly expanded. Such a phenomenon was remarkable when the tube was suddenly expanded from a folded state into a cylindrical shape for a high-speed bottom bonding process.
[0006]
It is considered that the cause is because the pieces of the folded cardboard case are in close contact with each other, so that a state close to vacuum occurs between the pieces when the pieces are expanded into a cylindrical shape, and the pieces are attracted to each other. . However, the effects of contact pressure and static electricity were also conceivable. As described above, if the expansion into the cylinder is not performed smoothly, damage to the expansion device to the cylinder, the subsequent bottom flap folding device, and even the bottom bonding device, and other various troubles are caused. Was something.
[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 device for expanding the cylindrical shape into a tubular shape, and then the bottom flap folding device can be used. It is an object of the present invention to provide a method and an apparatus capable of preventing damage to an apparatus, furthermore, a bottom bonding apparatus and other various troubles.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a method according to a first aspect of the present invention is to intermittently convey a folded corrugated cardboard case by a conveying device provided in parallel with an interval, and when the conveyance is stopped, the first suction cup is attracted to the lower rear piece. A second suction cup is sucked to the upper rear piece, and the second suction cup is raised and rotated from a horizontal position to a vertical position to expand the folding cardboard case into a cylindrical shape. Is characterized in that the upright rotation from the horizontal position to the vertical position is performed instantaneously slowly at the start of the upright rotation, and then quickly, thereby expanding the cylindrical shape of the folding cardboard case.
[0009]
According to the method of the present invention, the suction of the first suction cup on the lower rear piece of the folded cardboard case and the suction of the second suction cup on the upper rear piece of the folded cardboard case are quick. Done in
[0010]
On the other hand, when the folding cardboard case is expanded into a cylindrical shape, the speed at which the second suction cup sucked to the upper rear piece of the cardboard case rises from the horizontal position to the vertical position changes. Can be
[0011]
That is, in the method of the present invention, the upright rotation of the second suction cup from the horizontal position to the vertical position is performed slowly and subsequently quickly at the start of the upright rotation. In this way, the speed of the second suction cup at the time of the upright rotation at the start of the upright rotation is instantaneously reduced, allowing air to enter between the pieces of the cardboard case that are folded and in close contact with each other, This is because the state of adsorption between the pieces is eliminated, and the tubular shape is reliably expanded.
[0012]
The invention according to a second aspect of the present invention is an intermittent conveying device of a folding corrugated cardboard case which is provided in parallel at an interval, and a lower rear side of a folding corrugated ball case which is provided below the intermittent conveying device so as to be vertically movable and conveyed. A first suction cup which can be freely adsorbed to a piece, a second suction cup which is adsorbed to a rear piece on the upper surface of the folded corrugated cardboard case which has been conveyed simultaneously with the first suction cup, and is turned upright from a horizontal position to a vertical position; A cam mechanism for slowly starting the upright rotation of the second sucker to the vertical position, and a cylinder for quickly raising and rotating the second suction cup to the vertical position in cooperation with the cam mechanism; It is a cylindrical expansion device of a folding corrugated cardboard case characterized by the following.
[0013]
According to the device of the second aspect, the invention of the method of the first aspect can be easily and reliably implemented. That is, the suction of the second suction cup to the rear upper surface piece of the folding corrugated cardboard case can be quickly performed by causing the cam mechanism to cooperate with the cylinder.
[0014]
Next, at the time of starting the expanding of the folding cardboard case into a cylindrical shape, the second sucker is instantaneously slowly and vertically turned from the horizontal position to the vertical direction by the timing of the cam mechanism without operating the cylinder. Then, in synchronization with the return by the cam mechanism, the cylinder is actuated, and the second suction cup can be quickly turned upright from the horizontal direction to the vertical direction. Therefore, as described in the invention of the above method, the infiltration of air is allowed between each piece of the expanding corrugated cardboard case, the adsorption state between each piece is eliminated, and the tubular shape is smoothly expanded. Can be.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a main part of an automatic bottom sticking device of a corrugated cardboard case, and FIG. 2 is a side view mainly showing a tubular expanding portion, a bottom flap folding portion and a bottom sticking device portion of the same automatic cardboard case bottom attaching device. 3 is a plan view of a main part of the automatic cardboard case bottoming device, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, and FIG. 5 is a side view showing a folded state of the folded cardboard case.
[0016]
1 to 3, reference numeral 1 denotes a magazine portion, in which folded cardboard cases C are superposed and stored. In the drawing, reference numeral 2 denotes a shutter for supplying one block of the folded cardboard case C from above the magazine portion 1, and reference numeral 3 denotes one block of the folded cardboard case to the shutter 2, although not shown in detail. It is a lifter part to supply.
[0017]
The magazine portion 1 in which the folded cardboard case C is overlapped and stored has a lower end serving as an outlet of the folded cardboard case C, and a locking pin 4 provided in the outlet. The lowermost folded cardboard case C is locked.
[0018]
Then, the folded corrugated cardboard case C at the lowermost end of the magazine portion 1 is taken out by a suction cup 5 movably provided below the lower part thereof, and is placed on a conveying path 6 composed of a chain provided at intervals. It is supplied and conveyed to the cylindrical expansion part 7, the bottom flap folding part 7a, and the bottom sticking device 8.
[0019]
That is, the suction cup 5 is supported by the tip of a piston rod 10 of a cylinder 9, and the cylinder 9 and its piston rod 10 can freely advance and return toward the folding cardboard case C by a cam mechanism 11, that is, move up and down. It is freely supported.
[0020]
Specifically, as shown in FIG. 1, a plurality of guide rods 12 are erected below the magazine section 1, and a slider 13 is fitted to the guide rods 12 so as to be vertically movable. Next, the cylinder 9 is supported by 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 the horizontal support plate 14 is provided with a plurality of suction cups 5.
[0021]
On the other hand, the cam mechanism 11 includes a cam 15 having a large-diameter portion 15a and a small-diameter portion 15b, a rear end pivotally supported by the body 16, a front end engaged with the slider 13, and an intermediate portion of the cam 15 Is constituted by a swinging rod 17 engaged with.
[0022]
In the above configuration, the suction of the suction cup 5 to the folding cardboard case C is quickly performed by adjusting the timing of the driving of the cam mechanism 11 and the driving of the cylinder 9.
[0023]
That is, the cylinder 9 is driven in synchronization 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 swinging rod 17 with the rotation of the cam 15. As a result, the suction cup 5 provided at the tip of the piston rod 10 is raised by the advance of the piston rod 10 performed along with the upward movement of the cylinder 9, and the suction of the suction cup 5 to the folding cardboard case C is prevented. Done quickly.
[0024]
Next, a preferred removal of the folded cardboard case C to which the suction cup 5 has been adsorbed will be described. That is, when the folding cardboard case C is taken out, the suction cup 5 is returned slowly and immediately after the start of the return.
[0025]
Specifically, the suction cup 5 is adsorbed to the folding corrugated cardboard case C and the cylinder 9 is driven, that is, while the piston rod 10 of the cylinder 9 is advanced, The integrated slider 13 is instantly and slowly lowered by the cam mechanism 11 alone, and the suction cup 5 at the tip of the piston rod 10 slowly removes the folded cardboard case C from the magazine 1.
[0026]
That is, when the suction cup 5 returns, the drive of the cylinder 9 is stopped, and the slider 13 is driven 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. Only by the downward movement of the cylinder 9, the sucker 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 of the magazine portion 1. .
[0027]
As a result, the air infiltration time is ensured between the extracted folded corrugated cardboard case C and the next folded corrugated cardboard case C, and the suction state between the two folded corrugated cardboard cases C is eliminated and prevented.
[0028]
The cylinder 9 is driven in synchronization with the subsequent lowering of the suction cup 5 and the cylinder 9 by the cam mechanism 11, and supported by the tip of the piston rod 10 with the return of the piston rod 10 of the cylinder 9. The sucker 5 is quickly returned, and the folded cardboard case C taken out of the magazine 1 is quickly supplied onto the transport path 6.
[0029]
Thereafter, the folded corrugated cardboard case C supplied on the transport path 6 is intermittently transported by transport devices 18 and 18a composed of chains provided in parallel at intervals, and reaches the tubular expanding portion 7. . And it is expanded cylindrically by the cylindrical expansion method and apparatus of this invention.
[0030]
First, as shown in FIGS. 1 and 5, when the intermittently transported folding cardboard case C is stopped, a first suction cup 19 is provided on the lower rear piece C1. The suction cup 19 is raised by a 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 body 16, a tip end of the first suction cup 19, and an intermediate portion of the first suction cup 19. It is constituted by a swinging rod 22 engaged with the cam 21.
[0031]
Further, a second suction cup 23 is provided on the upper rear piece C2 of the intermittently conveyed folding cardboard case C when the intermittent conveyance of the folding cardboard case C is stopped, and the second suction cup 23 is rotatable upright from a horizontal position to a vertical position.
[0032]
As shown in FIG. 4, the second suction cup 23 is provided from the side of the transfer devices 18 and 18, and as shown in FIGS. 2 and 5, a cam mechanism 24, a cylinder which is vertically moved by the cam mechanism 24. The transport path 6 is configured to rise from the same horizontal position as the transport path 6 to a vertical position by the bent lever 25 and the rotating lever 26. The cam mechanism 24 includes a cam 27 having a large-diameter portion 27a and a small-diameter portion 27b, and a swinging rod having a rear end pivotally supported by the body 16 and an intermediate portion engaged with the cam 27. The cylinder 25 is supported at the tip.
[0033]
Further, one end of the bent turning lever 26 with the substantially middle portion as a fulcrum 30 is pivotally supported at the tip of a piston rod 29 of the cylinder 25 which 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 configuration described above, the second suction cup 23 is raised and rotated from the same horizontal position as the transfer path 6 to a vertical position by controlling the cam mechanism 24 and the cylinder 25 that is moved up and down by the cam mechanism 24. It is configured.
[0035]
In the present invention, the suction by the first suction cup 19 on the lower rear piece C1 of the folded corrugated cardboard case C is performed by the cam mechanism 20, and the second suction cup 23 on the upper rear piece C2 of the folded corrugated cardboard case C. The suction is quickly performed by the cam mechanism 24 and the cylinder 25.
[0036]
That is, the suction of the first suction cup 19 to the lower rear piece C1 of the folded cardboard case C is quickly performed by the rising end of the swinging rod 22 by the large diameter portion 21a of the cam 21.
[0037]
The suction of the second suction cup 23 to the upper rear piece C2 of the folding corrugated cardboard case C, which is performed almost simultaneously with the suction of the first suction cup 19, is performed by the swinging rod 28 by the small diameter portion 27b of the cam 27. Is rapidly performed by the lowering of the cylinder 25 and the operation of the cylinder 25 due to the lowering of the tip of the cylinder 25, that is, the return of the piston rod 29 of the cylinder 25.
[0038]
In the present invention, the upright rotation from the horizontal position to the vertical position where the second suction cup 23 is adsorbed to the upper rear piece of the folding corrugated cardboard case C2 is performed instantaneously slowly when the upright rotation starts, Then it happens quickly. That is, when the second suction cup 23 starts to stand up 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 swing The movement is performed only by the upward movement of the cylinder 25 due to the engagement of the intermediate portion of the moving rod 28. Therefore, the upright rotation start of the second suction cup 23 provided at the tip of the rotation lever 26 is performed slowly.
[0039]
As described above, the slow upright rotation of the second suction cup 23 by the cam mechanism 24 allows air to enter between each piece of the expanding folded cardboard case C, and eliminates the suction state between each piece. And smooth the expansion into a cylindrical shape.
[0040]
Thereafter, when the cylinder 25 which has been moved upward by the cam mechanism 24 is operated, the piston rod 29 of the cylinder 25 is advanced, and one end of the rotary lever 26 is quickly raised, and The provided second suction cups 23 are quickly raised and rotated to the vertical position, and the folded cardboard case C is expanded in a cylindrical shape.
[0041]
Next, the corrugated cardboard case expanded in a cylindrical shape is maintained in the cylindrical expanded state by the flap pressers 31 at both ends, and the upper surface thereof is further pressed by the upper conveying devices 32 and 32a formed of chains to maintain the cylindrical shape. It is conveyed to the bottom sticking device 8.
[0042]
Then, in the bottom sticking device 8, first, both bottom inner flaps are folded by the folding device 33, and then both bottom bottom flaps are folded by the folding device 34.
[0043]
During the process of folding the bottom outer flaps, a hot melt adhesive is applied to the outer surfaces of the bottom inner flaps by a gun. Thereafter, the bottom flap portion is pressed, and complete bottom bonding is performed.
[0044]
The press of the bottom flap portion and the complete bottom bonding are provided at a press plate 37 which is then advanced and returned by a cylinder 36 located outside the bottom flap, and at a position opposed to the press plate 37, and The pressing is performed by a press plate 39 which is advanced and returned by the cylinder 38 into the molded cardboard case. In the embodiment shown in the drawings, the pressing of the bottom flap 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, after being conveyed rearward from the press section, the opening thereof is pressed by the pusher 41, and the opening thereof is placed on the conveyor 42 configured at a lower position. And is conveyed to the next automatic product packaging apparatus (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 other various troubles can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of a cardboard case automatic bottom attaching apparatus.
FIG. 2 is a side view mainly showing an expanding device section, a bottom flap folding section, and a bottom attaching section of the automatic cardboard case bottom attaching apparatus.
FIG. 3 is a plan view of a main part of the automatic cardboard case bottoming device.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;
FIG. 5 is a side view of the folded cardboard case in a cylindrically expanded state.
[Explanation of symbols]
18, 18a Conveying device 19 First suction cup 23 Second suction cup 24 Cam mechanism 25 Cylinder

Claims (2)

The folded corrugated cardboard case is intermittently conveyed by a conveying device provided in parallel with an interval, and when the conveyance is stopped, the first suction cup is adsorbed on the lower rear piece and the second suction cup is adsorbed on the upper rear piece. And erecting the folded cardboard case into a cylindrical shape by raising and lowering the suction cup from the horizontal position to the vertical position, and raising and rotating the second suction cup from the horizontal position to the vertical position. A method for expanding a folding corrugated cardboard case, wherein the operation is started slowly and then quickly. An intermittent transport device of a folded corrugated cardboard case provided in parallel at an interval, a first suction cup that is vertically movable below the intermittent transport device and that can be adsorbed to the lower rear piece of the transported folded cardboard case; A second suction cup which is adsorbed to the upper rear piece of the folded cardboard case conveyed at the same time as the suction of the first suction cup and is turned upright from a horizontal position to a vertical position; A folding corrugated cardboard case, comprising: a cam mechanism that slowly starts upright rotation, and a cylinder that then quickly cooperates with the cam mechanism to quickly raise the second suction cup to the vertical position. Cylindrical expanding device.

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