JPH081076Y2 - Reprocessing equipment for paper boxes using hot-melt adhesive - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention is a paper box in which a flap is sealed with a hot-melt adhesive (so-called "hot-melt adhesive") such as a carton, and the flap is damaged. The present invention relates to a reprocessing device for peeling without peeling or for rebonding a peeled flap.

That is, the bonding of the flaps of the carton with the hot-melt adhesive is widely used for the packaging of products for the purpose of shortening the bonding time and streamlining the process. Adhesion failure of the flap often occurs due to temporary suspension of the agent applying device and the cartoning device. Cartons may be opened for sampling inspection and confirmation of the contents.

As described above, the reprocessing device according to the present invention can reprocess the paper box having the flap adhesion failure or the paper box with the flap opened without waste.

"Prior Art" Although it is not a reprocessing device like this invention, a top box sealing device for a paper box that folds the top plate and heat-bonds it by sending it with the top and bottom of the paper box filled with articles open It is disclosed in Japanese Kokoku Publication No. 48-6213.

This top-and-bottom board sealing device installs each pair of left and right upper and lower guide rails in parallel and horizontally, and a predetermined length between the upper and lower guide rails in a posture in which the paper box is tilted in a crossing manner with the guide rails. During the intermittent transfer, the top and bottom plates of the paper box are alternately folded by the inclined pieces installed on both sides of the guide rail, and the top and bottom plates in the folded state of the paper box are stopped while the paper box is stopped. The heating plate is pressed against both sides of the guide rail to press and seal the top plate.

"Problems to be solved by the invention" In the conventional device described above, the paper box is stopped on the transfer device,
In this stopped state, the top and bottom plates on both sides are pressed and sealed while being heated, and therefore cannot be applied as they are to a reprocessing device for opening.

Not only that, in the process of intermittent transfer, the top plate of the paper box is heated and pressed and sealed when the paper box is stopped, so it is possible to perform high speed processing above a certain level without damaging the top plate surface. Has a limit. That is, it is poor in industriality in terms of processing speed.

Further, since the structure is complicated, the failure is likely to occur, and it becomes relatively difficult to control the temperature and the pressing time by the pressing heating plate.

An object of the present invention is to provide a reprocessing apparatus for a paper box using a hot-melt adhesive, which solves the above problems.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the reprocessing device according to the present invention uses a pair of parallel metal endless belts with good heat conductivity, which are wound around a pulley. A transfer device that continuously transfers the paper box while sandwiching the paper box in a state where the belt is in contact with the flap surface of the paper box; a transfer device that faces the flap surface of the paper box that is being transferred via the endless belt; Is provided with a heating plate along a predetermined length range in the transfer direction.

[Operation] Since the reprocessing apparatus for a paper box using a hot-melt adhesive according to the present invention is configured as described above, a paper box whose flap portion needs to be opened by heating is applied to the end face of the paper box. If it is sequentially supplied to the transfer device while being in contact with the belt, the surface of the paper box having the flap, that is, the surface of the flap requiring reprocessing, is indirectly and gradually heated through the metal belt in the process of continuous transfer. Is
The adhesive of the flap is softened and opened.

On the other hand, use a paper box that requires re-adhesion by heating, such as a paper box with a flap with poor adhesion or a paper box that has been opened for inspection. When sequentially fed to the transfer device, the surface of the flap that needs to be reprocessed is gradually heated in the process of continuous transfer, and the adhesive is melted and rebonded or is ready for rebonding.

In the reprocessing device according to the present invention, the flap surface of the paper box is heated in the process of continuous transfer.Therefore, by adjusting the heating temperature by the heating plate and the transfer length of the heating plate part, high-speed processing can be performed very easily. In addition, it is possible to prevent damage such as printing on the flap surface of the paper box.

Since the belt is a metal belt having good thermal conductivity, the heat of the heating plate is more efficiently transmitted to the flap surface of the paper box through the belt, and the transfer distance for heating the flap surface is increased. Can be shortened.

Compared with the conventional top and bottom sealing device for paper boxes, the structure is very simple, there are almost no failures, and the temperature and heating time are much easier to control.

[Embodiment] A preferred embodiment of a reprocessing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an example of a reprocessing apparatus, in which a pair of pulleys rotatably erected on the upper surface of the table 1 is erected.
A transfer device 2 including a pair of endless belts 21 and 22 that are wound around 23, 24 and 25, 26 is installed. This transfer device 2
Is a pulley 23,2 driven by a motor or other drive source (not shown).
By rotating 5 in a symmetrical direction as indicated by an arrow, the paper box 4 is continuously conveyed from left to right in FIG. 1 while being sandwiched between the endless belts 21 and 22.

In this embodiment, the paper box 1 is configured so that both sides having flaps (not shown in FIG. 1) are sandwiched and transferred in contact with the endless belts 21,22. At a portion where the paper box 4 contacts, heating plates 3 having a predetermined length are installed so as to be close to the opposite side.

That is, the heating plates 3 and 3 face a surface of the flap of the paper box 4 being transferred via the respective endless belts 21 and 22 and cover a predetermined length range along the transfer direction of the transfer device 2. Support 3 fixed on the table 1 so that
Supported by 1,31 respectively.

For the endless belts 21 and 22, belts made of, for example, a mesh made of copper, aluminum alloy, or other metal having good heat conductivity are used.

As the heating plate 3, a panel heater, a casting heater, an infrared radiation plate, or the like is preferably used.

According to the reprocessing apparatus of this embodiment, when the reprocessing paper boxes 4 for peeling the flaps are sequentially fed from the left side of the drawing in the posture shown in FIG. 1, the paper boxes 4 are moved by the transfer device 2 to the right direction of the drawing. To the transfer device 2 while the flaps are gradually heated by the heating plate 3 in the process of the continuous transfer.
By the time the end of the sheet is reached, the hot-melt adhesive in the heating portion softens and reduces its adhesive force, and when the paper box 4 is sent out from the transfer device 2, the flap peels off due to its own repulsive force and the paper box 4 Is opened.

The transfer speed of the transfer device 2 (that is, the heating time) and the heating temperature of the heating plate 3 that are suitable for peeling the flap portion without damage are determined by the adhesive strength of the flap in the paper box 4, the paper quality, and the printing of the flap surface. It can be appropriately set through several trials depending on the condition, the size of the box, etc., but as a rough guide, it is the softening point of the hot-melt adhesive.
Use 90 to 110 ℃ as the standard for heating temperature, and set the heating plate 3 to 5
Set the speed range so that the paper box 4 passes in about 20 seconds.
In general, the low temperature long time type is often preferable to the high temperature short time type. The reason is that the high-temperature short-time type has a high possibility of burning the flap surface due to high temperature.

The reprocessing apparatus according to this embodiment continuously transfers the paper box 4 sandwiched by a pair of endless belts 21 and 22 operating in symmetrical directions, and flaps the paper box 4 while the paper box 4 passes through the length range of the heating plate 3. The surface of is gradually heated,
Since the flap is not pressed and heated at the time of stop during intermittent transfer at every predetermined distance, higher speed processing is possible without damaging the flap surface. For example, as described above, this type of reprocessing is more preferably performed at a low temperature for a long time, but the heating temperature by the heating plate 3 is made as low as possible and the transfer speed is increased so that the transfer distance corresponding to the length range of the heating plate 3 is increased. If the temperature is long, a low-temperature long-time type and high-speed processing can be realized, whereas in the case of the intermittent transfer type, the lower the low-temperature long-time processing, the lower the processing speed.

In addition, by appropriately adjusting the heating temperature, the transfer speed, and the transfer distance as described above, the control becomes much easier.

Furthermore, the simple structure allows less failures and less costly installation of the device.

If the flaps do not peel off sufficiently even when the paper box 4 passes through the transfer device 2 due to the material of the paper box 4 and other causes, the transfer device 2 shown in FIG. It is preferable to provide the device 5 and install the flap guides 6, 6 each having a sharp-edged peeling guide 61 at the tip end thereof on the side of the transfer device 5.

The transfer device 5 in FIG. 2 is composed of a pair of endless belts 51, 52 that transfer the paper box 4 by sandwiching the tubular part of the paper box 4 from above and below. The flap 41 is forcibly tilted to the side by the peeling guides 61, 61 of the flap guides 6, 6 to be peeled off.

When the flap having the poor adhesion is completely adhered by using the reprocessing apparatus shown in FIG. 1, the operation may be performed in the same manner as in the case of the above-mentioned peeling.

That is, when the paper box 4 is continuously supplied from the left side of the transfer device 2 with the surface of the flap facing the heating plate 3, the adhesive inside the flap melts during the continuous transfer of the paper box 4, and Passes through the portion of the heating plate 3 of the transfer device 2 and is rapidly cooled, so that the flap is bonded. In this case, if the flap is not completely re-adhered due to the paper quality of the paper box 4 or other reasons, a crimping device using a known crimping belt (not shown) is installed continuously to the end of the transfer device 2. , The heated flap portion is pressure-bonded while being cooled by the pressure-bonding device.

When the flaps of the opened paper box 4 are to be re-bonded, a hot-melt adhesive is reapplied on the back surface of the flaps if necessary, and the paper box 4 is transferred with the flaps closed as shown in FIG. If it is continuously supplied to the device 2 from the starting end side, the adhesive in the flap portion is heated and melted by the heating plate 3 while passing through the transfer device. Then, the paper box 4 is sandwiched and passed between a pair of pressure-bonding belts (not shown) continuously installed at the end of the transfer device while the flaps are in contact with the pressure-bonding belt, and the flap portion is released by the pressure-bonding belt. Reattach while cooling.

Although the heating temperature and the transfer rate for completely re-adhesion of the flap with poor adhesion or the peeled and opened flap without surface damage can be easily set by several trials,
As a rough guide, the melting temperature of the adhesive is 170
The heating temperature is set to ˜190 ° C., and the transfer speed of the transfer device 2 is set so that the time for the paper box 4 to pass through the length of the heating tool 3 is 5 to 20 seconds. Also in this case, the low temperature long time type is generally preferable to the high temperature short time type in many cases.

The apparatus of the above-mentioned embodiment has a structure for heating the surfaces of the flaps on both sides of the paper box 4 when the flaps are on both sides of the paper box 4. Since it may exist on only one side, in such a case, the heating plate 3 can be installed on only one side or only one heating plate 3 can be operated.

Further, the flap can be reprocessed for a paper box having a double-opening type flap separated from the center instead of the single-opening flap as shown in FIG.

"Effect of the device" In the reprocessing device for the paper box using the hot-melt adhesive according to the present invention, since the flap surface of the paper box is heated in the process of continuous transfer, the heating temperature by the heating plate and the transfer length of the heating plate part By controlling and adjusting the and, it is possible to perform high-speed processing very easily and prevent damage such as printing on the flap surface of the paper box.

Since the belt is a metal belt having good thermal conductivity, the heat of the heating plate is more efficiently transmitted to the flap surface of the paper box through the belt, and the transfer distance for heating the flap surface is increased. Can be shortened.

Compared with the conventional top and bottom sealing device for paper boxes, the structure is very simple, there are almost no failures, and the temperature and heating time are much easier to control.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a paper box reprocessing apparatus according to the present invention, and FIG. 2 is a partial perspective view showing an example of a flap forced peeling apparatus installed in association with the reprocessing apparatus according to the present invention. Is. Explanation of reference numerals in the main drawings 1 is a table, 2 is a transfer device, 21 and 22 are a pair of endless belts, 23, 24, 25 and 26 are pulleys, 3 is a heating plate, 4 is a paper box, 41
Is a flap, 5 is a transfer device, 51 and 52 are a pair of endless belts, 6 is a flap guide, and 61 is a peeling guide.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Sekine 3-24-1 Takada, Toshima-ku, Tokyo Taisho Pharmaceutical Co., Ltd. (72) Kunio Kojima 3-24-1 Takada, Toshima-ku, Tokyo Taisho (56) References JP-A-60-196333 (JP, A) JP-A-58-212935 (JP, A) Jikkou 48-6213 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A pair of parallel metal endless belts having good heat conductivity, which are wound around a pulley, and continuously transfer the endless belt while sandwiching the paper box in contact with the surface of the paper box having a flap. A transfer device, and a heating plate that faces the surface of the paper box being transferred and has a flap via the endless belt, and that extends along a predetermined length range in the transfer direction of the transfer device. , Paper box reprocessing equipment using hot-melt adhesive.