JP4187059B2 - Adhesive tape perforation forming apparatus and corrugated cardboard box sealing apparatus equipped with the same - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for forming a perforation in an adhesive tape used for sealing a cardboard box and the like, and a cardboard box sealing apparatus using the same.
[0002]
[Prior art]
As shown in FIG. 8A, the corrugated cardboard box W used for packing and transporting various articles has inner flaps f1 and f2 extending from the upper ends of the short sides of the peripheral walls in the four directions, respectively, in a state where the bottom surface is assembled. In addition, the outer flaps f3 and f4 are respectively extended from the upper end of the long side, and the articles are accommodated in the box, the inner flaps f1 and f2 are folded, and the outer flaps are placed on the outer flaps f1 and f2. The flaps f3 and f4 are folded, and then, as shown in FIG. 8 (b), the adhesive tape T is applied and sealed along the butt edge of the folded outer flaps f3 and f4.
[0003]
[Problems to be solved by the invention]
Examples of the adhesive tape used for the sealing include paper and resin films. Paper adhesive tape can be opened by tearing or peeling by hand, but when opening, part of the cardboard paper is also peeled off and damaged, and the empty cardboard box can be re-opened. It tends to be in a state where it is difficult to use. In addition, since the adhesive tape of resin film is difficult to tear by hand, it is often opened using a cutter knife, and the cardboard box after opening in this way is not damaged itself and is suitable for reuse. It becomes a state. However, opening with a cutter knife has to be performed carefully so as not to damage the internal article, and it takes time and effort to open the article.
[0004]
Thus, as a means of opening the sheet neatly without using a cutter knife, sealing with a perforated adhesive tape is also performed in some cases.
[0005]
Conventionally, as an apparatus for attaching a perforation to an adhesive tape, a device configured to pass the adhesive tape between a guide roller and a rotary cutter for forming a perforation has been used. Since the specifications were determined by the rotary cutter, in order to obtain a different perforation to obtain the desired sealing strength, the rotary cutter must be replaced and it takes time to change the specifications. It was.
[0006]
The present invention has been made paying attention to such circumstances, and provides a perforation forming device for an adhesive tape that can easily obtain perforations having different specifications in order to obtain a desired sealing strength. The main purpose. Another object of the present invention is to provide a cardboard box sealing device capable of efficiently performing perforated tape sealing using this perforation forming device.
[0007]
[Means for Solving the Problems]
The present invention has the following configuration in order to achieve the above object. That is, the adhesive tape perforation forming apparatus of the invention according to claim 1 is configured to pass the adhesive tape between the guide roller and the rotary cutter and form a perforation along the longitudinal direction of the adhesive tape by the rotary cutter. together configured to, the rotating cutter by Ri Oh comprises an air cylinder device for adjusting the pressing force of the rotary cutter with respect to the adhesive tape, the supply pressure of the air cylinder device is pressurized air supplied thereto is adjusted The air cylinder device presses the rotary cutter against the adhesive tape by opening and closing the air supply path to which pressurized air is supplied. It switches to the perforation formation state to perform, and the perforation formation cancellation | release state which canceled the contact to an adhesive tape, It is characterized by the above-mentioned.
[0009]
The sealing device of the cardboard box of the invention according to claim 2 includes a tape sticking mechanism for sticking an adhesive tape along the abutting edge of the outer flap of the cardboard box moving along a fixed path, and from the tape sticking mechanism. Further, the perforation forming device according to claim 1 is arranged at the upper position of the tape moving path.
[0010]
[Action]
According to the configuration of claim 1, when the pressing force of the rotary cutter to the adhesive tape is changed, the perforation pitch is not changed, but the degree of biting of the cutter blade into the adhesive tape is changed, and the pressing force is large. A perforation having a large cutting length is formed.
[0011]
In addition , when forming a perforated adhesive tape, the rotary cutter is pressed against the adhesive tape, and when performing high-strength sealing with an unperforated adhesive tape, the rotary cutter is separated from the adhesive tape, etc. Switch to the perforation formation release state.
[0012]
According to the structure of Claim 2 , a perforation can be attached to an adhesive tape in the tape supply path | route to a tape sticking apparatus, and the attachment condition of a perforation can be arbitrarily adjusted in that case. Further, if necessary, sealing can be performed with an adhesive tape without perforation.
[0013]
【Example】
FIG. 1 shows a side surface of a main part of a cardboard box sealing device.
This cardboard box sealing device is configured by arranging a tape sticking mechanism 2 above the transport table 1 on which the cardboard box W is placed. The cardboard box W placed on the transport table 1 is supplied with an upper guide 3. In the state where the upward lifting is prevented by the above, the pair of left and right conveying belts (not shown) arranged along the conveying table 1 is sandwiched from the left and right, and is horizontally conveyed from right to left in the figure. It is like that.
[0014]
A raw roll RT of the adhesive tape T is supported on the upper part of the tape attaching mechanism 2 via the support arm 4, and a perforation forming device 6 is provided on the front surface of the fixed frame 5. The adhesive tape T fed out from the raw roll RT is guided to the perforation forming device 6 through the guide roller 7, where a perforation m along the longitudinal direction of the tape is formed at the center in the width direction of the adhesive tape T. The adhesive tape T in which the eyes m are formed is supplied to the tape attaching mechanism 2 via the guide rollers 8 and 9.
[0015]
As shown in FIGS. 1 and 2, the perforation forming device 6 includes a freely rotatable guide roller 10 for winding and guiding the adhesive tape T guided from the guide roller 7 with its adhesive surface inside. A freely rotating disk-shaped rotary cutter 11, a cutter holder 12 that pivotally supports the rotary cutter 11, and an air cylinder device 13 that supports the cutter holder 12 with respect to the guide roller 10 so as to freely advance and retract. .
[0016]
As shown in FIG. 1, pressurized air from an air supply source 14 such as an air pump or a compressor is supplied to the air cylinder device 13 via a pressure adjustment valve 15, and the pressure adjustment valve 15 is manually operated. Then, by adjusting the supply pressure, the pressing force of the rotary cutter 11 against the adhesive tape T can be arbitrarily adjusted.
[0017]
As shown in FIG. 3, on the periphery of the rotary cutter 11, for example, blades e for intermittently forming perforations m having a cutting length of about 5.0 mm and a continuous portion length of about 0.5 mm at a constant pitch are provided. The degree of perforation m can be changed by changing the pressing force applied to the adhesive tape T. That is, as the pressing force of the adhesive tape T of the rotary cutter 11 is increased, the cutting length of the perforation m is increased as shown in (a), (b), and (c) of FIG. is there.
[0018]
The air cylinder device 13 is shortened and biased by an internal spring, and an open / close valve 16 is connected to the air supply path. By closing the open / close valve 16, the air cylinder device 13 is advanced. The perforation formation state can be obtained by opening the on-off valve 16 and the air cylinder device 13 is shortened and the perforation formation release state in which the rotary cutter 11 is separated from the adhesive tape T is opened. It can be switched.
[0019]
The tape sticking mechanism 2 is configured as follows. That is, as shown in FIG. 5, the tape sticking mechanism 2 includes a front sticking roller 21, a rear sticking roller 22, a tape cutter 23, and the like positioned before and after the transport path. The front sticking rollers 21 and 22 are mounted on the free ends of the swing arms 25 and 26 supported by the frame plate 24 so as to be swingable up and down around the fulcrums P1 and P2, respectively, The cutter 23 is attached to a free end portion of a swing arm 27 supported on the frame plate 24 so as to be swingable up and down around a fulcrum P3 with a cutting edge facing downward.
[0020]
Both swing arms 25 and 26 are interlocked and linked by a link 28, and move up and down in synchronization with each other, and both swing arms are supported by a spring 29 stretched between the frame plate 24 and the swing arm 26. 25 and 26 are biased so that the free ends thereof enter the conveyance path of the cardboard box W. A guide roller 30 for holding the adhesive tape T guided by the guide rollers 6 and 7 is provided near the free end of the swing arm 25. The tip of the adhesive tape T has an adhesive surface on the upper side of the conveyance path (see FIG. Then, it is guided and held on the front surface of the front sticking roller 21 in a posture toward the right). The swing arm 27 is also urged by a spring 32 stretched over the frame plate 24 so that the free end portion 27a enters the movement locus of the lateral corner of the cardboard box W.
[0021]
The operation of the adhesive tape attaching mechanism 2 is as follows.
[0022]
(1) As shown in FIG. 5, in the initial state where the corrugated cardboard box W does not reach, the front sticking roller 21, the rear sticking roller 22 and the tape cutter 23 supporting the adhesive tape T are respectively in the transport path of the cardboard box W. It is in the rushed position.
[0023]
(2) When the corrugated cardboard box W comes into contact with the front sticking roller 21, the front sticking roller 21 recedes upward against the spring 29 while the front end ta of the adhesive tape T is stuck to the front surface of the cardboard box W. . Along with this, the rear sticking roller 22 also moves up and down.
[0024]
(3) When the cardboard box W further moves forward, as shown in FIG. 6, the front sticking roller 21 rides on the cardboard box W and puts the adhesive tape T along the abutting edges of the left and right outer flaps f3 and f4. Paste it. At this time, the rear sticking roller 22 that has been lifted and retracted is also on the moving path of the cardboard box W, and the swinging arm 27 is pushed up against the spring 32 by contact with the cardboard box W, so that the tape cutter 23 adheres. It is retracted above the tape T.
[0025]
(4) Even if the cardboard box W further advances and the front sticking roller 21 is detached from the rear end of the cardboard box W, the front sticking roller 21 is still on the cardboard box W while the rear sticking roller 22 is still on the cardboard box W. Is held in the raised position, and the adhesive tape T protruding from the rear end of the cardboard box W is in a tension state. Here, when the free end portion 27a of the swing arm 27 is disengaged from the rear end of the cardboard box W, the tape cutter 23 is lowered by the spring 32, and the adhesive tape T that has been tensioned as described above is cut. Here, the tape cutting position can be adjusted by adjusting the protruding length of the free end portion 27 a of the swing arm 27.
[0026]
(5) As the cardboard box W further moves forward, as shown in FIG. 7, the rear application roller 22 that is biased downward moves relative to the cardboard box W from the upper surface to the rear surface while being pressed and contacted, The rear end portion tb of the adhesive tape T is wrapped around and attached to the rear surface of the cardboard box W, and the cardboard box W after the tape sealing is completed is carried out from the end of the transport path.
[0027]
With the above, one adhesive tape sticking operation is completed and the initial state is restored to prepare for the next box arrival.
[0028]
In addition, this invention can also be implemented with the following forms.
(1) The air cylinder device 13 is configured as a backward moving type that can be advanced and retracted via a flow path switching valve, and the rotary cutter 11 is forcibly retracted by air pressure to obtain a perforation formation release state. it is also possible to.
(2) Contrary to the above-described embodiment, the rotary cutter 11 of the perforation forming device 6 is fixed in position, and the guide roller 10 facing it is pressed on the cutter side with air pressure or spring pressure, and the perforation is marked. You may adjust the condition. In this case, it is preferable to fix the guide roller 10 at the retracted position so as to obtain a perforation formation release state.
[0029]
【The invention's effect】
As is apparent from the above description, the following effects can be expected according to the present invention.
According to the first aspect of the present invention, since the degree of perforation can be arbitrarily adjusted by adjusting the pressing force of the rotary cutter against the adhesive tape, a troublesome operation such as replacement of the rotary cutter is required. The perforated pressure-sensitive adhesive tape that provides the desired sealing strength can be easily obtained, and any tape sealing that prioritizes the sealing strength or prioritizes handling at the time of opening can be performed. became.
[0030]
Further , not only the perforation can be adjusted arbitrarily, but also a state in which the perforation is not provided can be obtained as required, and it can be conveniently used even in a package in which sealing strength is particularly required.
[0031]
According to the second aspect of the present invention, since the perforation can be formed while sealing the tape of the cardboard box, it is not necessary to prepare the adhesive tape that has been subjected to perforation formation in advance, and a normal adhesive tape is used. However, tape sealing with perforated adhesive tape can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a side view showing a main part of a cardboard box sealing device according to an embodiment.
FIG. 2 is a perspective view of a perforation forming apparatus.
FIG. 3 is a side view showing a part of a rotary cutter for forming perforations.
FIG. 4 is a plan view showing a part of an adhesive tape on which various perforations are formed.
FIG. 5 is a side view showing a tape attaching process.
FIG. 6 is a side view showing a tape attaching process.
FIG. 7 is a side view showing a tape attaching process.
FIG. 8A is a perspective view of a cardboard box before sealing processing, and FIG. 8B is a perspective view of a cardboard box after sealing processing.
[Explanation of symbols]
2 Tape pasting mechanism 6 Perforation forming device 10 Guide roller 11 Rotating cutter W Corrugated box f3, f4 Outside flap

Claims (2)

The adhesive tape between the guide roller and the rotary cutter is interposed passed, together configured to form a perforation along the tape longitudinal direction to the adhesive tape by the rotary cutter, air to adjust the pressing force of the rotary cutter with respect to the adhesive tape Ri Oh comprises a cylinder device, the air cylinder device is adjusted supply pressure of pressurized air supplied thereto
By adjusting the pressing force of the rotary cutter to adjust the cutting length of the perforation, the air cylinder device opens and closes an air supply path to which pressurized air is supplied, so that the rotary cutter Is switched to a perforation formation state in which the adhesive tape is pressed and a perforation formation release state in which contact with the adhesive tape is released . A perforation of claim 1 provided with a tape affixing mechanism that affixes an adhesive tape along the abutting edge of the outer flap of the cardboard box that moves along a fixed path, and at a higher position in the tape movement path than the tape affixing mechanism. A cardboard box sealing device, characterized in that the device is provided.

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