JPH03289405A - Method and apparatus for closing lid in setting up casket packing machine - Google Patents

Abstract

PURPOSE:To enable always lid closing and box sealing of a carton in a regular shape by a method wherein in a process of folding an upper flap, at the time of box sealing by folding or pasting the upper flap, the carton is raised up in a right box shape and the upper flap is folded or pasted to a lower flap while the carton is kept in this state. CONSTITUTION:A carton 33 filled with content is folded at side flaps at the both ends of the carton 33 at process (I). Next, while the carton 33 is carried by a carton conveyor 1 to process (II), a lower flap 2b is folded, a photoelectric sensor detects the folding of the lower flap 2b, and hot melt is jetted on the surface of the lower flap 2b. Next, in process (III), a cyrindrical correcting member 6c of a correcting device 6 is made to descend, while the front surface of the carton 33 is pursued toward an opposite direction of a transfer direction (IV), and a front surface upper ridge part and a cyrinder central part of the correcting member 6c are aligned to correct the carton 33 into a normal box shape. During this holding of the carton 33 for correction, the folding member is made to descend from point (D) to point (E) and the upper and lower flaps 6a and 6b are pasted to each other.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method and device for closing the lid of a set-up type small box packing machine, and in particular, to a lid closing method and device for a set-up type small box packing machine, and in particular, to The present invention relates to a lid closing method and a lid closing device for a set-up type small box packing machine that applies glue and closes the lid.

(Prior art) Generally, the set-up type is widely used for small boxes (hereinafter referred to as cartons) used in small box packaging machines (Figure 4).
.

In the set-up type, the body is pre-glued and folded into a sleeve shape (Fig. 4A). When used, the box is assembled and opened (Fig. 4B), and the items to be packaged are filled or inserted. It opposes the upper flap (C in the same figure).

By assembling the box in this way, the large panel has a certain degree of rigidity and functions as a relatively rigid packaging container.
Suitable for packaging soft products.

In particular, boxes that use a gluing device to close the lids have strong rigidity and are excellent in distribution suitability.

To close the carton, the carton is raised to its regular shape (regular hexagonal shape for hexagonal cartons) using a small box packing machine that uses a gluing device, and then the top and bottom flaps are glued together. This is very important.

Also, in the folding method, it is necessary to open the carton into a regular box shape and then insert the top flap.

If you glue it without assembling it into a regular box shape, it will have a so-called diamond-shaped cross section, which not only spoils the product image, but also
This is because it becomes a cause of weakening the rigidity of the carton.

Furthermore, for products that require a tray to be placed inside the carton, a problem arises in that the tray cannot be placed in the carton depending on how the carton is assembled.

Furthermore, if the carton is assembled in an abnormal manner, the glue applied to the bottom flap etc. will not be completely covered by the top flap and some will stick out, causing various problems during the packaging stage. .

(Problem to be solved by the invention) Therefore, as a conventional method for making a carton into a regular box shape,
One method is to manually fold a carton folded into a sleeve shape in the opposite direction to create a slightly overcorrected fold before loading the carton into a small box packing machine.

However, according to this method, whether the carton returns to its normal shape when it is opened by a small cartoning machine depends on the restoring force of the carton;

However, the resilience and strength of a carton depend on the type of sheet that the carton is made of, the storage and transportation conditions, etc.

In particular, the stiffness of a carton is strongly affected by humidity, so even cartons with the same loft will vary depending on their storage conditions.

This causes the above-mentioned problems.

Another method is to narrow the distance between the attachments of the chain conveyor that conveys the cartons so that the cartons do not become shaped abnormally.

In other words, the small box packing machine has the structure shown in Fig. 5 (an example of a horizontal small box packing machine), and the folded carton is transferred from the carton magazine (30) to the sakushi cup (31).
) Attachment (3) for a chain conveyor (not shown) that takes out the sheets one by one and conveys them in synchronization
placed inside. The carton (33) is raised into a sleeve shape when the attachment (3) is inserted, and as it is transported in the direction shown, filling (C54) and gluing (36) are carried out.
), the flaps are closed (or the upper flaps are folded in), and the carton is assembled.

Therefore, if the distance between the attachments (3) that hold the carton in the upright position is kept as narrow as possible, the carton will not take on an abnormal box shape.

However, even if the spacing between the attachments (3) is narrowed, since they are linked by a chain, the chain has play, so the spacing will widen in accordance with the conveyance load.

Also, if this interval is narrowed, there is a risk of damaging the carton (33) when inserting the carton with the sakshi carbon cup (31), and since there are actually variations in box dimensions, this method could not solve the problem. .

The present invention has been made in view of the problems of the prior art described above, and even if the carton is not erected in the normal shape during conveyance on a chain conveyor, products can be inserted and glued without sealing or folding the top flap. This set-up type small box can be assembled into a regular box shape regardless of the type or condition of the carton by actively raising the carton into a normal box shape using a straightening device and then closing the lid. An object of the present invention is to provide a lid closing method and a lid closing device for a stuffing machine.

(Means for Solving the Problem) The above object is to apply glue to the bottom flap or side flap of the small box after folding it in the folding process of a set-up type small box packing machine. Then, in the folding process of the upper flap, the correction member is moved to a position where it does not interfere with the transport of the small box, and in synchronization with the arrival of the small box, a straightening member that can be raised and lowered is placed in advance at the top of the front of the small box. The set-up type is characterized in that the upper flap of the small box is folded and sealed while raising the small box into a regular box shape by lowering the small box to the abutting position and transporting the small box to the folding completion position. This is achieved by the lid closing method of the small cartoning machine.

In addition, in the folding process of a set-up type small box packing machine that inserts the top flap and closes the lid, both side flaps of the small box are folded in, and then the top flap is folded in, and the small box is normally transported. The correction member is evacuated to a position where it will not interfere, and synchronized with the arrival of the small box, the straightening member, which can be raised and lowered, is lowered to a position where it contacts the upper front surface of the small box, and the correction member is moved to the position where folding of the small box is completed. This is achieved by a lid closing method for a set-up type small box packing machine, which is characterized by folding and sealing the top flap of the small box while raising the small box into a regular box shape.

In that case, it is preferable that the correction member is constituted by a rotatable cylindrical roller.

Another object of the present invention is to fold the top flap in the folding process of a small box packing machine that is equipped with a side flap folding device or a spray gluing device for closing the lid of the small box, and a lid closing and folding process for the top flap. A correction member is provided at the folding completion position, which is normally retracted to a position that does not interfere with the transportation of the small box, and which is movable up and down and comes into contact with the upper front surface of the small box in synchronization with the arrival of the small box. This is achieved by the lid closing device of the set-up type small cartoning machine.

Further, in this case, it is preferable that the correction member is constituted by a rotatable cylindrical roller.

(Function) According to the present invention, after folding the lower flap and spraying glue thereon, in the folding process of the upper flap, when closing the upper flap into the glued lower flap, the carton is returned to its normal shape. Since the top flaps are folded in while being corrected, and then pasted and fixed together, all cartons can always be sealed in a regular box shape.

The same applies to foldable upper flaps.

Therefore, even if the restoring force and stiffness of the folded portion of the carton used vary depending on the storage conditions, the carton can be manufactured in a stable and regular shape without being affected by these factors.

(Example) Next, an example of the present invention will be described based on the drawings, taking a horizontal small box packing machine as an example.

Fig. 1 shows an external view of the main parts of the gluing and folding process of the small box packing machine according to the present invention. The carton conveyor (1) is equipped with attachments (5a), (3b), and (30) on both sides in accordance with the external dimensions of the carton (33).
) (3d) are set up at regular intervals, and sleeve-shaped cartons are housed in these cartons, and as they are transported, products are filled, the bottom flap is folded (step 1), and glue is sprayed onto the bottom flap. The manufacturing process is performed by sequentially performing steps such as closing the upper flap (closing process), and discharging the carton (ff process).

The above-mentioned processes are performed by intermittent feeding of the carton conveyor (1).

(4) shows a hot melt nozzle, in which a photoelectric sensor (not shown) detects the carton (3) at a predetermined timing, and when the predetermined timing is reached, the previous process (L process) Hot melt is injected onto the folded lower flap by the hot melt nozzle (4).

(6) shows the folding device of the upper flap, and the cylinder (
5a) and a folding member (50) fixed to the tip of the telescopic rod (5b) of this cylinder, and folding the upper flap of the carton CAB) transported to the l process,
Attach it to the bottom flap that was glued in the previous step.

(6) When gluing the upper and lower flaps,
This is a straightening device that straightens the carton (33) into a normal box shape, and consists of a cylinder (6a) and a straightening member (60) attached to the tip of a telescopic rod (6b).

And when this correction device (6) is activated (position G)
The straightening device (6) is attached to the machine stand so that the straightening member (6C) is in a position where it comes into contact with the upper front surface of the carton (33).

Further, this correction member (6c) is made of a rotatable cylindrical roller, and rubber is applied to the outer peripheral surface of the correction member (6c) so as not to damage the surface of the carton (33) during operation.

The control device for this straightening device (6) and flap folding device (6) is such that the straightening member (6C) of the straightening device (6) is Move from point to point 0 and press the top of the front of the deformed carton to correct it to its regular shape.

Next, the folding member (5c) of the flap folding device (6) moves from point D to point E while correcting and holding the carton (33), and folds the upper flap. After the folding of the upper flap is completed, the folding member (6c) and the correcting member (6c) are configured by a known circuit so as to return to their original positions.

Next, its operation will be explained.

In Figure 1, the filled carton (33) is
In one step, the side flaps at both ends of the carton are folded in.

Although this folding device is not shown, it is accomplished by a folding tacker (40) shown in FIG.

Next, due to tact operation of carton conveyor (1), l
While being transported to the process, the carton (36) whose lower flap is folded by a descending guide (not shown) activates hot melt according to the detection by a photoelectric sensor, and the hot melt is sprayed onto the surface of the folded lower flap. .

Next, at a predetermined timing, the carton (33) transported to the l process first activates the straightening device, extends the telescopic rod, and moves the straightening member (6c) to the upper front surface of the carton (33) while it is being stopped. If the carton (33) is deformed, raise it to its normal shape.

That is, since the straightening member (6c) has a cylindrical shape, as the straightening member (6c) descends, the carton (33)
The front side is driven in the opposite direction to the conveyance direction, and the carton (s3
) It is corrected to a regular box shape where the front upper ridge line and the center of the correction member (60 mm cylinder) coincide.

Then, while the carton (33) is being straightened and held, the upper flap folding device is operated to lower the folding member from point D to point E, thereby pasting the upper flap and the lower flap.

As described above, even if a deformed carton or a weak carton is supplied, since the carton is shaped into a regular box shape and then glued, it is possible to always assemble the carton in a constant and normal manner.

In addition, in the above embodiment, the correction member (6) of the correction device (6)
Although it has been described that a cylindrical roller is provided as c), it may also have a shape as shown in FIG.

In addition, in the above embodiment, the method of applying glue to seal the top flap was described, but even if the sealing method is a folding type of the top flap, the same method can be applied by performing a folding operation after straightening the carton. It can be activated.

In addition, in the embodiment, explanation was given using a horizontal carton as an example, but
The principles of the present invention can also be easily applied to vertical cartoners.

However, the principles of the present invention can be easily applied even to a continuous carton conveyor by synchronizing the device with the operation of an attachment.

(Effects of the Invention) As described in detail above, in the process of folding the top flap, the present invention folds the top flap or attaches glue to the carton by folding it up into a regular box shape, and then folding the carton in this state. Since the upper flap is folded in or attached to the lower flap while being held, the carton can always be closed and sealed in a normal manner.

Also, since the orientation of the carton is corrected before gluing, etc.
It is possible to roughly adjust the spacing between carton conveyor attachments.

[Brief explanation of the drawing]

Fig. 1 is an external view of the main parts of the lid closing device of the set-up type small cartoning machine according to the present invention, Fig. 2 is an operational side view of the correction device, and Fig. 3
FIG. 4 is an operational side view showing another embodiment of the straightening device, FIG. 4 is an assembly sequence diagram of a set-up type carton, and FIG. 5 is an external view showing the planing process of a horizontal small box packing machine. 1... Carton conveyor 3... Attachment 4
...Hot melt nozzle 5...Flap folding device

Claims (1)

[Claims] (1) In the folding process of the setup type small box packing machine,
After folding the lower flap or side flap of this small box, glue is sprayed on the lower flap or side flap, and then during the folding process of the upper flap, it is usually retracted to a position where it does not interfere with the transport of the small box, Synchronizing with the arrival of the small box, a straightening member that can be raised and lowered is lowered in advance to a position where it contacts the upper front surface of the small box, and the small box is moved to the folded position to complete the folding process. A lid closing method for a set-up type small box packing machine characterized by folding and sealing the top flap of the small box while raising it into a box shape. (2) In the folding process of the setup type small box packing machine,
In the process of folding both side flaps of this small box, then the bottom flap, and then the top flap, the box is normally retracted to a position that does not interfere with the transport of the small box, and can be raised and lowered in advance in synchronization with the arrival of the small box. Lower the straightening member to a position where it contacts the upper front of the small box, and using the movement of the small box to the completed folding position, fold the top flap of the small box while raising the small box into a regular box shape. A method for closing the lid of a set-up type small box packing machine characterized by sealing. (3) A lid closing method for a set-up type small box packing machine according to claim (1) or (2), wherein the correction member is comprised of a rotatable cylindrical roller. (4) Folding of the top flap in the folding process of a small box packing machine equipped with a side flap and bottom flap folding device or a spray gluing device and a lid closing and folding process of the top flap. A setup characterized in that a correction member that is movable up and down is provided at the completion position, which is normally retracted to a position that does not interfere with the transportation of the small box and comes into contact with the upper front surface of the small box in synchronization with the arrival of the small box. Lid closing device for small box packing machine. (6) The lid closing device for a set-up type small box packing machine according to claim (4), wherein the correction member is comprised of a rotatable cylindrical roller.