JPH04352620A - Device for sealing box by means of heat sensitive adhesive tape - Google Patents

Abstract

PURPOSE:To sufficiently apply a heat sensitive adhesive tape to the whole joint of a box. CONSTITUTION:When a box 50 is transferred to a specified lacation by a transfer means and a heat sensitive adhesive tape 15 is delivered from a tape reel 16 toward the box 50, the adhesive of the tape 15 is thermally activated before it reaches a bonding tool 21 by means of a hot air blower 92, a heating plate 82 or heating rolls 69A, 69B, 69C. When bonding of the activated tape 15 to the joint is started by means of a tape bonding means, the leading end face of the tape having been bonded by the moving force of the box is thermally activated again by a reheat nozzle 88 and pressed by a press roll 83. The trailing end of the tape 15 is cut off by a clipper blade 41 and then pressed by a press roll 33. Consequently the whole tape, from the leading end to the tailing end, can be evenly bonded without causing insufficient bonding.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a cardboard box or a similar box with a lid (herein simply referred to as a box).

0002

2. Description of the Related Art Conventionally, when storing contents in a box of this type and packaging it for transportation, for example, Japanese Patent Laid-Open No. 53-6149
As described in Publication No. 2, in order to prevent the lid from being opened during transportation, the seams of the butted lids are integrated from the front gable side to the rear gable side using packaging adhesive tape such as cloth tape, craft tape, or gummed tape. There is a known sealing device that uses the so-called I-stick method.

That is, this sealing device includes a transport means for transporting the box in a predetermined direction, a tape delivery means capable of intermittently supplying a heat-sensitive adhesive tape toward the box, and a tape delivery means for transporting the box in a predetermined direction. a tape applying means for applying the adhesive tape sent from the means from one end of the box body to the other end along the predetermined direction using a pasting tool; A configuration comprising: a tape cutting means for cutting the tape into a predetermined length; and a rear end surface pressing means for pressing the adhesive tape to be applied to the rear end surface corresponding to the other end of the box body. It has become.

0004

[Problems to be Solved by the Invention] However, in the above-mentioned conventional configuration, the adhesive tape is pasted along the seam of the lid of the box body by pressing with a pasting tool, and the adhesive tape is cut on the rear end surface. In order to avoid the sagging condition, sufficient adhesion is achieved by means of pressing the rear gable surface, but the adhesive tape is only affixed to the front gable surface by the self-propelled force of the box, and a special pressing means is not required. Since the adhesive tape is not provided, there is a problem that, especially when the adhesive tape is of a heat-sensitive type, adhesion may not be achieved sufficiently due to non-uniform thermal activation of the adhesive.

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, it is an object of the present invention to provide a means for achieving sufficient adhesion over the entire seam of a box body of a heat-sensitive adhesive tape.

[0006]

[Means for solving the problem] In order to achieve the above purpose,
The invention according to claim 1 includes: a transport means for transporting the box body in the longitudinal direction of the joint of the lid; a tape feeding means capable of intermittently supplying a heat-sensitive adhesive tape toward the box body; tape applying means for applying the adhesive tape sent from the tape sending means from one end of the box body to the other end along the seam of the lid; tape cutting means for cutting the adhesive tape into a predetermined length; and rear end surface pressing means for pressing the adhesive tape to be affixed to a rear end surface portion corresponding to the other end of the box body. In a box sealing device using a heat-sensitive adhesive tape, the device is provided between the tape delivery means and the tape sticking means, and is configured to heat the adhesive tape in order to thermally activate the adhesive. heating means having a heat source; front gable reheating means for blowing hot air at about the thermal activation temperature onto an adhesive tape attached to the front gable corresponding to one end of the box; The present invention is characterized by comprising a front gable surface repressing means for pressing the gable surface portion.

[0007]

[Operation] When packing boxes such as cardboard boxes,
The transport means transports the box to a predetermined location, and the tape delivery means sends out the heat-sensitive adhesive tape toward the box. The adhesive tape thus sent out is heated to about the thermal activation temperature of the adhesive before reaching the tape sticking means. After that, the tape pasting means is activated and I pasting starts, and the adhesive tape is pasted from the front gable side of the box body to the rear gable side along the seam of the lid, but the front gable side part is Since it is reheated by the front gable surface reheating means and pressed by the front gable surface repressing means, and the rear gable surface portion is pressed by the rear gable surface pressing means, there is no risk of adhesion failure. Note that the adhesive tape is cut into an appropriate length by the tape cutting means before the rear end surface pressing means starts operating.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This embodiment shows a case where the seam of the lid of a cardboard box is sealed by I-stick.

FIG. 3 shows the overall configuration of the sealing device according to this embodiment. In the figure, 1 is a main frame, and the main frame 1 is movable on the installation surface by casters 1a. A transfer table 2 for placing a box (not shown) for transfer is provided on the upper part of the main frame 1, and a prime mover 3 with a speed reducer is provided in the lower part of the interior of the main frame 1. A power transmission chain 6 is interposed between a sprocket 4 attached to the power shaft and a sprocket 5 disposed above the sprocket 4. Further, the sprocket 5 can rotate integrally with a pulley 7, and an endless rubber belt 9 for conveyance is wound between the pulley 7 and the other pulley 8. The prime mover 3, endless rubber belt 9, etc. constitute a means for transporting the box.

The upper surface of the rubber belt 9 is substantially in the same plane as the upper surface of the transfer table 2, and above the transfer table 2 there are provided two plates for regulating the position of the box body in a direction perpendicular to the running direction.
A book guide rail 10 is provided. Further, a pair of support columns 11a and 11b are attached to the main frame 1, and an I pasting mechanism 12 is assembled to the support pillars 11a and 11b, and the rear end of the I pasting mechanism 12 (the end near the support pillar 11a) is attached to the main frame 1. A pressing member 13 for the upper lid of the box body is provided in the lower part). A support member 14 is provided vertically on the side plate main frame 1, and the I pasting mechanism 12 is attached to the support member 14 in the vertical direction (
The support member 14 is slidably attached in the longitudinal direction of the support member 14.

FIGS. 1 and 2 show details of the I pasting mechanism 12. The I pasting mechanism 12 has a pair of opposing side plates 17a and 17b, and the both side plates 17a and 17b are assembled substantially parallel to each other via four support rods 18a to 18d. A reel support 16A is attached to the side plate 17a, and a tape reel 16 for winding the adhesive tape 15 is attached to the upper end of the reel support 16A. The tape reel 16 and the like constitute tape feeding means.

The tape reel 16 is wound around a relay roll 81 that is pivotally supported by the reel support 16A, and is further wound around a guide roll 19 via an arched heating plate 82.
is wound around. The heating plate 82 constitutes a preheating means for the adhesive tape 15, and is made of, for example, a member that radiates heat when energized, and the entire back surface of the adhesive tape 15 that passes through it comes into contact with the heating plate 82.

[0013] The guide roll 19 has both side plates 17a.
, 17b, and below the guide roll 19 there is disposed an applicator 21 having a substantially L-shaped side surface, and the upper end of the applicator 21 is attached to a rotating shaft 22. There is.

On the other hand, one end of the side plates 17a and 17b (
A rotation holding shaft 83 is attached between the support rods 18a and 18b (near the support rods 18a, 18b), and the upper end of a curved rotation arm 84 is attached to the rotation holding shaft 83. A pressure roll 85 is rotatably attached to the other end of the movable arm 84. Note that a pressing spring 87 is stretched between the rotating arm 84 and a latch pin 86 protruding from the side plate 17a. The pressure roll 85 and the like constitute front gable surface repressing means.

Further, a reheating nozzle 88 is attached near the rotating arm 84, and the tip of the reheating nozzle 88 faces the front end surface described later. A hot air supply source (not shown) is connected to the base end of the reheating nozzle 88 .

On the other hand, both ends of the rotating shaft 22 pass through a pair of blocks 23 provided at a predetermined distance inside the upper part of the adhesive 21, and the blocks 23 are not shown in detail. However, the upper end of the warping tool 25 is rotatably attached.

The lower end of the warping tool 25 passes through the inside of a pair of holding claws 29, and the claws 29 are shaped like a pair of crab claws. It is fixed to the part. The upper end of the warping tool 25 is inserted into a rectangular hole (not shown) formed in the plate surface of the pasting tool 21. Note that the adhesive tape 15 is attached to the warping tool 2.
5 and the holding claw 29.

Further, a pin 31 provided on a protruding piece 30 protruding from the pasting tool 21 has one end of a connecting rod 32 (FIG. 1).
The right end of the connecting rod 32) is rotatably attached, and the other end of the connecting rod 32 (
4) is a pin 34a at the upper end of the rotation holding member 34.
A presser roll 33 is rotatably attached to a bracket 34b at the lower end of the rotation holding member 34. The rotation holding member 34 is rotatable around a rotation shaft 35 supported between the side plates 17a and 17b.

A tension spring 37 is tensioned between a pin 34a at the upper end of the rotation holding member 34 and a spring hook 36 projecting from the side plate 17a. Said adhesive tool 2
1. The warping tool 25, the presser roll 33, etc. constitute a tape sticking means for the adhesive tape 15.

On the other hand, a cam plate 38 is rotatably attached to the side plate 17a around a pin 39 protruding from the side plate 17a, and a clipper blade 41 is attached to the cam plate 38 via a metal fitting 40. installed. Note that the side plate 17a
A tension spring 44 is stretched between a spring hook 42 projecting from the cam plate 38 and a spring hook 43 projecting from the cam plate 38. Further, a rotation stopper 45 for the cam plate 38 is attached to the side plate 17a. The cam plate 38
, the clipper blade 41, etc. constitute tape cutting means.

A holding shaft 9 is provided between the cam plate 38 and the presser roll 33 and between the side plates 17a and 17b.
A gold brush 90b is attached to the holding support shaft 90 via a holding base 90a. The gold brush 90b and the like constitute adhesion assisting means.

Further, a hot air nozzle 91 is provided near the pasting tool 21, and the tip of the hot air nozzle 91 faces near the pawl 29, while the base end of the hot air nozzle 91 faces the vicinity of the claw 29. A hot air blower 92 is attached to the side plate 1 through a fixing member 93.
7a and 17b. The hot air blower 92 and the like constitute heating means.

Next, the operation of the box sealing device according to the first embodiment constructed as described above will be explained.

First, to attach the adhesive tape 15, as shown in FIG. 1, the core of the wound adhesive tape 15 is pushed into the tape reel 16 and attached. In this case, the back surface of the adhesive tape 15 contacts the heating plate 82 via the relay roll 81 from the tape reel 16 . The heating plate 82 is heated to, for example, 70 to 120 degrees Celsius, and when the back side of the adhesive tape 15 comes into contact with it, the adhesive enters a so-called preheated state before being thermally activated.

Next, the end of the adhesive tape 15 in the drawing direction is pulled out downward, and then the warping tool 25 is pressed clockwise in FIG. 1 against a return spring (not shown). A gap is created between the holding claw 29 and the holding claw 29.

Next, the pulled out adhesive tape 15 is inserted into the gap from the tip, so that the tip is connected to the adhesive tape 21.
so that it is at the same position as the bottom edge of. The adhesive tape 15
When the pressure on the warping tool 25 is released after the tape is inserted into the gap, the warping tool 25 moves the central rear surface of the adhesive tape 15 to the holding tab 2 by the accumulated force of the return spring 28.
Press in direction 9.

The above-adjusted I pasting mechanism 12 is set at an appropriate height position of the pillars 11a and 11b according to the height of the box to be sealed as shown in FIG. The interval between the two guide rails 10 is optimized by adjusting a guide rail receiver (not shown) depending on the width of the box.

On the other hand, the hot air blower 92 is kept in an operable state, and when the adhesive device 21 is rotated, a relay means (not shown) is activated, so that a temperature of, for example, 10 degrees Celsius is emitted from the nozzle 91.
Hot air of about 0 to 200 degrees Celsius is blown out and the hot air is blown onto the adhesive tape 15 placed along the upper surface of the adhesive 21 to thermally activate the adhesive.

Next, the prime mover 3 is started to drive the power transmission chain 6, and the endless rubber belt 9 is run in the direction of the arrow in FIG. 8 (counterclockwise in FIG. 3). In this state, the box placed on one end of the transfer table 2 (the end on the pulley 8 side) is manually moved until a part of the box rests on the rubber belt 9. Thereafter, when the box moves in the direction of the arrow, the upper lids of the box are first folded and brought into contact with each other by the presser member 13, and then moved below the I pasting mechanism 12.

FIGS. 4 to 9 specifically explain the subsequent operations.

When the box body 50 is sent below the front ends of the side plates 17a and 17b with the top cover folded, the box body 50
As shown in FIG. 4, the adhesive tape 15 starts to be attached from the tip to the front end of the abutting part of the upper cover, so that the box body 5
The adhesive tape 15 attached to the tape reel 1
It is rolled out from 6.

[0032] In the initial state, that is, before the adhesion is performed, the adhesive tape 15 is pressed against the holding claw, but after the adhesion has started, the adhesive tape 15 is pressed against the warping tool. 25 is pressed against the sticking tool 21, so that it can be easily pulled out from between the holding claws 29. In this case, the length of the adhesive tape 15 to be attached to the front gable surface can be changed by adjusting the length of the attachment tool 21.

Next, as the box body 7 is transferred by the running of the rubber belt 9, the adhesive tape 15 attached to the front end surface is removed.
is pressed close to the adhesive 21, so that the adhesive 21 rotates clockwise around the pivot shaft 22 and tilts as shown in FIG.

At this time, the adhesive tool 21 rotates around the rotation shaft 22 due to its contact with the box 50. When the rotation shaft 22 rotates, hot air is blown out from the nozzle 91 and the adhesive tape 15 is blown out. sprayed on. At this time, since the adhesive tape 15 has been preheated by the heating plate 82, the nozzle 9
The adhesive is quickly activated by heating according to No. 1, in other words, by main heating with hot air. Therefore, the adhesive tape 15 is firmly attached along the seam of the lid of the box body 21.

Note that even after that, the adhesive tape 15 is attached to the box body 7.
The warping tool 25 is unrolled as the adhering tool 2 is transferred.
Since it is fed out while being pressed to the 1 side, the adhesive surface will not adhere to the holding pawl 29.

[0036] Furthermore, when the pasting by the pasting tool 21 starts, the gold brush 9 provided following the pasting tool 21
0b presses the adhesive tape 15 from the back side along the seam of the lid of the box body 50. The pressure of the gold brush 90b flattens the adhesive surface of the adhesive tape 15, including the seam portion.

Furthermore, as the box body 50 moves forward, as shown in FIG.
As shown in FIG. 3, the pressure roll 85 comes into contact with the front end surface of the box body 50, and at the same time hot air is blown from the reheating nozzle 88 toward the front end surface, so that the adhesive tape 15 on the front end surface is thermally activated again. Furthermore, the peeled portions of the adhesive tape 15 due to poor adhesion are eliminated, and the adhesive tape 15 is sufficiently adhered.

On the other hand, when the pasting tool 21 rotates clockwise about the rotation shaft 22, the connecting rod 32 connects with the pin 3.
1 and 34a, the rotational movement is transmitted to the upper end of the rotational holding member 34, so that the rotational holding member 34 rotates counterclockwise about the rotational shaft 35. Therefore, the presser roll 33 at the lower end of the rotation holding member 34
reaches a position corresponding to the top surface of the box 50, and at the same time the tension spring 37 is expanded. Due to the stretching, the tension spring 3
The restoring force of 7 is transmitted to the presser roll 33 to make the adhesion of the adhesive tape 15 more reliable.

On the other hand, the clipper blade 41 is connected to the cam 3.
8, so when the adhesive tape 15 is attached to the box body 50,
That is, when the top end of the box 50 is pushing up the bottom end of the cam 38, it does not come into contact with the adhesive tape 15. Note that when the attachment position of the clipper blade 41 to the cam 38 is adjusted, the length of the adhesive tape 15 fed out from the rearmost end of the box 50, that is, the length of the adhesive tape 15 affixed to the rear end surface of the box 50 is adjusted. The length can be changed as appropriate.

Next, as shown in FIG. 6, when the cam 38 to which the clipper blade 41 is attached is removed from the rear of the box 50, the clipper blade 41 is moved in the direction of the arrow by the spring force of the second tension spring 44. It moves to cut the adhesive tape 15.

The adhesive tape 15 is removed by the clipper blade 41.
When the adhesive tape 15 is cut, the tension of the adhesive tape 15 disappears and the adhesive tape 21 returns to the position before rotation, and the rotation holding member is 34 rotates clockwise, the rear end of the adhesive tape 15 is pressed by the surface of the presser roll 33, and the rear end surface of the box body 50 is sufficiently adhered (see FIG. 7).

[0042] When the adhesion of the adhesive tape 15 to the box body 1 is completed (see Fig. 8), a limit switch (not shown) is actuated to stop the operation of the hot air blower 92. The same sealing process as described above is repeated for other boxes that are subsequently transported.

In the above embodiment, in order to make the drawings easier to understand, the I pasting mechanism 12 is provided only on the top side of the box, but it is generally provided on the bottom side of the box as well. It is true.

FIGS. 10 and 11 show the main parts of a second embodiment of the present invention. In the case of this embodiment, a crank-shaped reel support 60 is provided in place of the reel support 16A in the first embodiment, and the reel support 60 has a balancer that pivotally supports the relay roll 81 at one end. bar 82
is rotatably attached via a pin 83. Note that a balance weight 64 is attached to the other end of the balance bar 82.

A tape pressing member 65 is provided above the adhesive tape wound on the tape reel 16, and one end of the tape pressing member 65 is attached to a fixing bar 66, while the other end is attached to a fixing bar 66. A weight body 67 is attached to the end. By providing the tape pressing member 65, it is possible to prevent the tape reel 16 from spinning idly.

On the other hand, a horizontally long heat insulating box 68 constituting a preheating means is provided between the relay roll 81 and the pasting tool 21, and within the heat insulating box 68, three heating rolls 69A, 69B and 69C are arranged side by side so that their axes are substantially parallel. And each heating roll 69A, 69
The adhesive tape 15 is wound around B and 69C so as to thread between them.

Here, both front and rear ends (left and right sides in FIG. 10) of the heat insulation box 68 are opened, and the adhesive tape 15 is inserted through the front opening 68a, and the adhesive tape 15 is inserted through the rear opening 68b. It is designed to run toward the clothing 21. In addition, each of the heating rolls 69, 69B,
69C is made of, for example, metal, metal coated with silicone rubber, etc., and its rotational drive source is linked to the I-sticking operation of the box.

With this configuration, while the adhesive tape 15 passes through the heat insulation box 68, the adhesive tape 15 is preheated, for example, at 7 degrees Celsius, as in the case of the first embodiment.
Although it is heated from 0 degrees to 120 degrees, the heating roll 69A,
69B and 69C, the entire surface of the adhesive tape 15 is heated more fully than in the first embodiment.

A tape pressing member 65 is provided at the upper part of the tape reel 16 over a semicircular area, and one end of the tape pressing member 65 is locked to a locking shaft 66. A weight 67 is attached to the other end of the member 65.

Note that the hot air blower 92 has two branch nozzles, that is, a lower nozzle 91Aa and an upper nozzle 91Ab.
The lower nozzle 91Aa faces the lower position of the pawl 29, and the upper nozzle 91Ab faces the upper position of the pawl 29, respectively. Thereby, the reduction in heat activation of the adhesive by the upper nozzle 91Ab can be compensated for by the lower nozzle 91a.

Other configurations and operations are the same as those of the first embodiment, so redundant explanation will be omitted.

[0052]

[Effect of the invention] As described above, according to the invention of claim 1,
a transport means for transporting the box body in the longitudinal direction of the seam of the lid; a tape delivery means capable of intermittently supplying heat-sensitive adhesive tape toward the box body; tape applying means for applying an adhesive tape along the seam of the lid from one end of the box body to the other end using an adhesive; A heat-sensitive adhesive comprising: a tape cutting means for cutting the tape to the right end; and a rear end surface pressing means for pressing the adhesive tape to be applied to the rear end surface corresponding to the other end of the box body. In the apparatus for sealing a box with tape, a heating means is provided between the tape delivery means and the tape sticking means and has a heat source for heating the adhesive tape to thermally activate the adhesive; , a front gable surface reheating means for blowing hot air at about the temperature of the thermal activation onto an adhesive tape attached to a front gable surface portion corresponding to one end of the box body, and a means for pressing the front gable surface portion; Since the structure includes the front gable surface repressing means, pressing is also performed on the front gable surface, thereby avoiding poor adhesion of the heat-sensitive adhesive tape, and sufficient adhesion is achieved over the entire seam. Note that when repressing the front gable surface, the adhesive is reheated using hot air, so thermal activation can be performed quickly.

[Brief explanation of the drawing]

FIG. 1 is a front view showing main parts of a sealing device according to a first embodiment of the present invention.

FIG. 2 is a plan view taken along line A-A in FIG. 1;

FIG. 3 is a front view showing the overall configuration of the present sealing device.

FIG. 4 is a front view showing the relationship between the applicator and the box before starting I-applying.

FIG. 5 is a front view showing the relationship between the applicator and the box body after the applicator starts rotating.

FIG. 6 is a front view showing the relationship between the clipper blade and the box when it is in operation.

FIG. 7 is a front view showing the relationship between the presser roll and the pressure roll when they are in operation and the box body.

FIG. 8 is a perspective view showing the box body after I pasting is completed.

FIG. 9 is an enlarged front view of main parts for explaining the relationship between the pressure roll, reheating nozzle, etc. and the box before the clipper blade is operated.

FIG. 10 is a front view showing main parts of a sealing device according to a second embodiment of the present invention.

11 is a plan view taken along line BB in FIG. 10. FIG.

[Explanation of symbols]

9 Rubber belt (transfer means), 12 I pasting mechanism, 15 Heat-sensitive adhesive tape, 16 Tape reel (tape sending means), 21 Pasting tool (tape pasting means), 41 Clipper blade (tape cutting means), 33 Presser roll (rear gable surface pressing means), 82 heating plate (heating means), 69A, 69B, 69C heating roll (heating means),
85 Pressing roll (front gable surface reheating means), 88 Reheating nozzle (front gable surface reheating means).

Claims (1)

[Claims] 1. A transport means for transporting the box body in the longitudinal direction of the seam of the lid, a tape feeding means capable of intermittently supplying a heat-sensitive adhesive tape toward the box body, and the tape tape applying means for applying the adhesive tape sent from the sending means from one end of the box body to the other end along the seam of the lid; A tape cutting means for cutting the adhesive tape into a predetermined length, and a rear end surface pressing means for pressing the adhesive tape to be affixed to the rear end surface corresponding to the other end of the box body. In a box sealing device using a heat-sensitive adhesive tape, the heat source is provided between the tape delivery means and the tape sticking means and heats the adhesive tape in order to thermally activate the adhesive. a front gable surface reheating means for blowing hot air at about the thermal activation temperature onto an adhesive tape attached to a front gable surface portion corresponding to one end of the box body; A box sealing device using a heat-sensitive adhesive tape, characterized in that it is equipped with a front end face repressing means for pressing the box.