JP2000043828A - Perforation forming device for adhesive tape and sealing apparatus for corrugated fiberboard box equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make diverse forms of perforations with ease to obtain desired sealing strength. SOLUTION: An adhesive tape T is held and passed through between a guide roller 6 and a rotary cutter 11, and perforations are formed on the adhesive tape T by the rotary cutter 11 along the longitudinal direction of the tape; then, by allowing the rotary cutter 11 to be pressed to the adhesive tape T by the air cylinder device 13 and controlling air pressure to the air cylinder device 13 by a pressure control valve 15 to the air cylinder device 13, the press force of the rotary cutter 11 can be controlled to the adhesive tape T.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming perforations on an adhesive tape used for sealing a cardboard box and the like, and an apparatus for sealing a cardboard box using the same.

[0002]

2. Description of the Related Art As shown in FIG. 8 (a), a cardboard box W used for packing and transporting various articles has an inner flap f1, from an upper end of a short side of a four-sided peripheral wall portion in a state where a bottom surface is assembled. f2 is extended, and outer flaps f3 and f4 are extended from the upper end of the long side, respectively. The articles are stored in the box and the inner flaps f1 and f2 are folded. , On which the outer flap f3,
Then, as shown in FIG. 8 (b), the adhesive tape T is applied along the edges of the folded outer flaps f3 and f4 and sealed.

[0003]

The pressure-sensitive adhesive tape used for the above sealing includes a paper tape and a resin film. The adhesive tape made of paper can be opened by tearing or peeling it off by hand, but when opening it, a part of the corrugated paper will be peeled and damaged, and the empty cardboard box will need to be re-opened. They tended to be difficult to use. Also, since the adhesive tape of the resin film is hard to tear by hand, it is often opened using a cutter knife,
The cardboard box after opening in this manner is not damaged by itself, and is in a state suitable for reuse. However, opening with a cutter knife must be done carefully so as not to damage the internal articles, and it takes time to open.

[0004] Therefore, as a means to cleanly open without using a cutter knife, sealing with a perforated adhesive tape has been performed in some cases.

Conventionally, as a device for perforating an adhesive tape, a device configured to allow the adhesive tape to pass between a guide roller and a rotary cutter for forming a perforation has been used. Since the perforations were determined by the rotary cutter, the rotary cutter had to be replaced in order to obtain a different perforation to obtain the desired sealing strength. Was to be taken.

The present invention has been made in view of such circumstances, and is a device for forming a perforation of an adhesive tape which can easily obtain perforations of different specifications in order to obtain a desired sealing strength. The main purpose is to provide Another object of the present invention is to provide a cardboard box sealing device that can efficiently perform perforated tape sealing using the perforation forming device.

[0007]

The present invention has the following configuration to achieve the above object. In other words, the adhesive tape perforation forming device according to the first aspect of the present invention is such that the adhesive tape is sandwiched and passed between the guide roller and the rotary cutter, and the rotary cutter forms perforations along the tape longitudinal direction by the rotary cutter. And a pressure adjusting means for adjusting the pressing force of the rotary cutter against the adhesive tape.

According to a second aspect of the present invention, there is provided an adhesive tape perforation forming apparatus according to the first aspect, wherein the rotary cutter is pressed against the adhesive tape.
It is configured to be able to switch to the perforation release state where the contact with the adhesive tape is released.

According to a third aspect of the present invention, there is provided a cardboard box sealing device including a tape sticking mechanism for sticking an adhesive tape along a butt end of an outer flap of a cardboard box moving along a fixed path. The perforation forming device according to claim 1 or 2 is arranged at a position on the tape moving path rather than the attaching mechanism.

[0010]

According to the first aspect of the present invention, if the pressing force of the rotary cutter against the adhesive tape is changed, the perforation pitch remains unchanged, but the degree of penetration of the cutter blade into the adhesive tape changes. As the pressure increases, perforations having a larger cutting length are formed.

According to the second aspect of the present invention, when forming the perforated adhesive tape, the rotary cutter is pressed against the adhesive tape, and when performing the high-strength sealing with the unperforated adhesive tape, the rotary cutter is used. The state is switched to the perforation release state by, for example, separating from the adhesive tape.

According to the third aspect of the present invention, the adhesive tape can be perforated in the tape supply path to the tape adhering device, and at this time, the degree of perforation can be arbitrarily adjusted. . In addition, if necessary, it is possible to perform a sealing process using an adhesive tape that is not perforated.

[0013]

FIG. 1 shows a side view of a main part of a cardboard box sealing device. This cardboard box sealing device is configured by disposing a tape sticking mechanism 2 above a carrier 1 on which a cardboard box W is placed, and the cardboard box W placed and supplied on the carrier 1 is provided with an upper guide 3. While being prevented from rising upward, is sandwiched from the left and right by a pair of left and right transfer belts (not shown) arranged along the transfer table 1 and is horizontally transferred from right to left in the drawing. It has become.

A material roll RT of the adhesive tape T is supported on the upper portion of the tape attaching mechanism 2 via a support arm 4, and a perforation forming device 6 is provided on a front surface of the fixed frame 5. The pressure-sensitive adhesive tape T fed from the material roll RT is guided to the perforation forming device 6 via the guide roller 7, where a perforation m along the tape longitudinal direction is formed at the center of the pressure-sensitive adhesive tape T in the width direction. The adhesive tape T on which the eyes m are formed is supplied to the tape attaching mechanism 2 via the guide rollers 8 and 9.

As shown in FIGS. 1 and 2, the perforation forming device 6 is a freely rotatable guide roller for winding and guiding the adhesive tape T guided from the guide roller 7 with its adhesive surface inside. 10, a freely rotatable disk-shaped rotary cutter 11, a cutter holder 12 supporting the rotary cutter 11, and a guide roller 1
Air cylinder device 13 supported to move back and forth with respect to zero
It is composed of

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 through a pressure adjusting valve 15. By manually adjusting the supply pressure, the pressing force of the rotary cutter 11 against the adhesive tape T can be arbitrarily adjusted.

As shown in FIG. 3, on the peripheral edge of the rotary cutter 11, for example, a blade e for forming a perforation m having a cutting length of about 5.0 mm and a continuous portion length of about 0.5 mm at a constant pitch is provided. It is formed intermittently, and by changing the pressing force on the adhesive tape T, the degree of perforation m can be changed. That is, as the pressing force of the adhesive tape T of the rotary cutter 11 is increased, (a) in FIG.
As shown in (b) and (c), the cut length of the perforation m increases.

The air cylinder device 13 is shortened and urged 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 closed. 13 can be advanced to obtain a perforation forming state.
By opening 6, the air cylinder device 13 can be shortened and differentially switched so that the rotary cutter 11 can be switched to the perforation release state in which the rotary cutter 11 is separated from the adhesive tape T.

The tape attaching mechanism 2 is configured as follows. That is, as shown in FIG. 5, the tape attaching mechanism 2 includes a front attaching roller 21 and a rear attaching roller 22 located before and after the transport path, a tape cutter 23, and the like. The front affixing rollers 21 and 22 are provided with a swing arm 25 supported by a frame plate 24 so as to be able to swing up and down around fulcrums P1 and P2, respectively.
The tape cutter 23 is mounted on the frame plate 24 at a fulcrum P3.
It is attached to the free end of a swing arm 27 which is supported so as to be able to swing up and down with its blade pointed downward.

The swinging arms 25 and 26 are linked and connected by a link 28 so as to move up and down in synchronism with each other by rotating in opposite directions, and both springs 25 are stretched over the frame plate 24 and the swinging arm 26. Swing arms 25 and 26
The free end is urged so as to enter the transport 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. (In the right direction), the guide is held on the front surface of the front application roller 21. Further, the swing arm 27 is also urged by a spring 32 stretched over the frame plate 24 so that its free end portion 27a protrudes into the movement locus of the lateral corner of the cardboard box W.

The operation of the adhesive tape sticking mechanism 2 is as follows.

(1) As shown in FIG. 5, the cardboard box W
In the initial state where does not reach, the front sticking roller 21, the rear sticking roller 22, and the tape cutter 23, which support the adhesive tape T, are located at positions protruding into the transport path of the cardboard box W, respectively.

(2) When the cardboard box W comes into contact with the front sticking roller 21, the front end part of the adhesive tape T is attached to the front sticking roller 21 while the front end portion ta of the adhesive tape T is stuck on the front surface of the cardboard box W.
Retreats upward against the spring 29. In addition, the rear attaching roller 22 also moves up and retreats accordingly.

(3) When the cardboard box W is further advanced, the front application roller 21 rides on the cardboard box W as shown in FIG. 6 and the adhesive tape T is applied to the butting edges of the left and right outer flaps f3 and f4. Paste along.
At this time, the rear affixing roller 22 that has moved up and down is also on the moving path of the cardboard box W, and the swing arm 27 is pushed up against the spring 32 by the contact with the cardboard box W, and the tape cutter 23 is adhered. It is retracted above the tape T.

(4) Even if the cardboard box W moves further forward and the front sticking roller 21 comes off the rear end of the cardboard box W, the front sticking roller 22 remains on the cardboard box W while the rear sticking roller 22 is still positioned on the cardboard box W. The sticking roller 21 is held at the raised position, and the adhesive tape T protruding from the rear end of the cardboard box W is in a tension state. Here, the free end 27a of the swing arm 27
Is released from the rear end of the cardboard box W, the tape cutter 23 is lowered by the spring 32, and cuts the adhesive tape T that has been tensioned as described above. Here, the tape cutting position can be adjusted by adjusting the protruding length of the free end portion 27a of the swing arm 27.

(5) As the cardboard box W is further advanced, the rearwardly adhering roller 22, which is urged downward, moves relative to the cardboard box W while being pressed from the upper surface to the rear surface as shown in FIG. And the rear end t of the adhesive tape T
b is put around the rear surface of the cardboard box W and attached, and the tape-sealed cardboard box W is carried out from the end of the transport path.

With the above, one operation of sticking the adhesive tape is completed, the operation returns to the initial state, and preparations are made for the next box.

The present invention can be implemented in the following modes. The air cylinder device 13 may be configured as a backward type that can advance and retreat via a flow path switching valve, and the rotary cutter 11 may be forcibly retracted by air pressure to obtain a perforation release state. it can. The rotary cutter 11 of the perforation forming device 6 can be mechanically pressed by a spring, and the spring pressure can be adjusted and released. Contrary to the above embodiment, the position of the rotary cutter 11 of the perforation forming device 6 is fixed, and the guide roller 10 opposed thereto is pressed on the cutter side by air pressure or spring pressure to adjust the perforation condition. You may do it. in this case,
It is preferable to fix the guide roller 10 at the retracted position so as to obtain a perforation release state.

[0029]

As is clear from the above description, according to the present invention, the following effects can be expected. According to the first aspect of the present invention, it is possible to arbitrarily adjust the degree of perforation by adjusting the pressing force of the rotary cutter against the adhesive tape, so that a troublesome operation such as replacement of the rotary cutter is required. Without, it is possible to easily and easily obtain a perforated pressure-sensitive adhesive tape that provides the desired sealing strength,
Arbitrary tape sealing can be performed, giving priority to sealing strength or giving priority to handling at the time of opening.

According to the second aspect of the present invention, not only the degree of perforation can be arbitrarily adjusted, but also a state in which no perforation is formed can be obtained as required, and sealing strength is particularly required. It can be conveniently used in packaging.

According to the third aspect of the present invention, the perforation can be formed while the tape of the corrugated cardboard box is sealed, so that it is not necessary to prepare an adhesive tape which has been subjected to the perforation processing in advance. The tape can be efficiently sealed with a perforated adhesive tape while using the tape.

[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 step.

FIG. 6 is a side view showing a tape attaching step.

FIG. 7 is a side view showing a tape attaching step.

FIG. 8A is a perspective view of a cardboard box before a sealing process,
(B) is a perspective view of the cardboard box after the sealing process.

[Explanation of symbols]

 2 Tape attaching mechanism 6 Perforation forming device 10 Guide roller 11 Rotary cutter W Cardboard box f3, f4 Outer flap

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E056 CA04 DA05 EA03 EA06 FB02 FB08 GA03 3E094 AA03 CA33 DA02 EA06 FA12 GA11 HA03 HA13

Claims (3)

[Claims] An adhesive tape is sandwiched and passed between a guide roller and a rotary cutter, and a perforation is formed on the adhesive tape along the tape longitudinal direction by the rotary cutter. An apparatus for forming a perforation of an adhesive tape, comprising a pressure adjusting means for adjusting a pressure. 2. The adhesive tape according to claim 1, wherein the rotary cutter is configured to be switchable between a perforated state in which the rotary cutter is pressed against the adhesive tape and a perforated state in which the contact with the adhesive tape is released. Perforation forming equipment. 3. A tape sticking mechanism for sticking an adhesive tape along a butt end of an outer flap of a cardboard box moving along a fixed path, wherein the tape sticking mechanism is located at a position on the tape moving path higher than the tape sticking mechanism. A device for sealing a cardboard box, wherein the device for forming perforations according to claim 1 or 2 is provided.