JP3483471B2 - Corner reinforced tray box making machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a flat plate-shaped blank sheet using corrugated board or paperboard as a raw material.
The present invention relates to a box making machine for assembling a tray having reinforcing posts formed of columnar spaces each having a triangular cross section at four corners.

Since the tray having the special shape as described above has the reinforcing posts, that is, the column-shaped spaces at the four corners, it has a much higher pressure resistance than the ordinary tray or carton having only four walls. Therefore, it is possible to store a product that is extremely expensive and thus has poor independence. That is, for example, a bag in box or a standing pouch,
Liquids, powders, stored in relatively flexible plastic bags,
Or it can store products with high fluidity such as viscous materials, and even in that case, it exhibits comparable strength when bottles and cans are stored in normal cartons. Therefore, it is useful for reducing the generation of non-burnable dust such as bottles and cans, and it is one of the tray forms that has been attracting attention in recent years.

[0003]

2. Description of the Related Art First, the structure of the tray will be described.
It will be explained that due to the structure, there are difficulties in automatic assembly from a blank sheet or automation of box making. An example of the tray is as shown in FIG. 1, and is characterized in that columnar (= post-shaped) spaces 2 are formed at four corners of the tray body 1. In assembling and box-making, a special means for forming the post portion is required, and it is necessary to combine various mechanisms for automation other than manual attachment. I had no choice.

By the way, as the material for the tray, paperboard or corrugated board is generally used, but in order to improve the folding accuracy of these materials, it was always necessary to go through the "curse-folding step". For example, US Pat. No. 4,62.
As disclosed in US Pat. No. 4,653, FIG.
It was necessary to attach a device as shown in FIG. 2 (B) and FIG. 3 (A) to FIG. 3 (D) to the preceding stage of the box making process. That is,
It was necessary to bend the flaps 2a for forming the columnar space portions 2 at the four corners of the tray toward the inner surface of the panel wall of the tray body, and to fix the edges to the panel wall surface. Therefore, prior to fixing, the flap part should be
The peculiar folding was performed through the guide device indicated by reference numeral 9 in (A). More specifically, as shown in the figure, after the blank sheet is folded once through a fixed guide device having a large number of tapered rollers 9a to 9d, and the inclination of the rotary shaft of the rollers is gradually increased, The folding flap 2a formed on the sheet is fixed to the inside of the panel surface of the tray.

[0005]

As described above, when a corner-reinforcing tray is formed from a blank sheet, a fixed guide device for folding the blank is required before the box making device. However, this device has the following problems and is difficult to put into practical use. First, the material of the blank sheet is a relatively high-rigidity sheet such as paperboard or corrugated board, and these sheets have different rigidity depending on the type. Had difficulty in responding to changes in rigidity, and therefore had low bending accuracy. In particular, when corrugated board is used as the material, the folding accuracy in the step direction (flute direction) is low, which is an obstacle to improving the box-making efficiency. Secondly, in order to reduce the bending resistance of the material as much as possible, a guide device with a gentle curve is required, but this inevitably increases the machine length and the space for installing the device. However, there was a drawback that the equipment cost was increased. In the present invention, in order to solve the problems of the conventional type, the problems are identified,
As a result of diligent research, we succeeded in developing an efficient new device.

That is, according to the present invention, when the tray is manufactured from a flat plate-like blank sheet, it is possible to eliminate the need for the previous step of folding and folding, which is required in the conventional type, and to reduce the installation space of the mechanical device. It is intended to improve the box-making accuracy and the box-making speed at the same time.

[0007]

In order to achieve the above object, in the present invention, a side panel and an end panel are extended to four sides of a rectangular bottom panel, and the end panel is further extended.
Bra with an extended flap to form a columnar space
From the sheet, consists of a columnar space with a triangular cross section at the four corners
In a box making machine for assembling a tray having a reinforcing post, a flap folding device at a front stage for folding the flap.
And the next step to apply the adhesive to the blank sheet at the specified position.
Adhesive applicator, and the side panel and gable panel
It has a four-round panel start-up device in the latter stage
In the next stage, the adhesive coating device has a columnar space with a triangular cross section.
Adhesive for joining after forming the side panel and
Machine for applying both adhesives for joining gable panels
The four-stage panel rising device at the rear stage has a rectangular mandrel 15 that can move up and down to push down the bottom panel.
And a fixed guide member 16 that removably receives the mandrel, and is provided on two opposite surfaces of the mandrel.
Positioned and swiveled outward from the side, the wife
Flap for forming a columnar space adjacent to the face panel
Flap presser arm 15a for temporarily pressing
It is intended to provide a box making machine characterized by being arranged in .

It should be noted that the mandrel can be moved up and down in two steps through a cylinder so that the flap formed on the panel can be folded in two steps without using a special folding mechanism. This is realized by using a guide member.

Further, according to the present invention, the flap pressing arm incorporated in the mandrel is mounted so as to be rotatable within a range of 90 degrees by utilizing the reciprocating motion of the actuator or the cylinder, and thereby the flap is folded. We have succeeded in compacting the entire mechanism.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION First, an example of a carton blank or blank sheet (hereinafter simply referred to as a blank) used in the present invention will be described with reference to FIG. This blank 1 has a pair of end face panels 4 and 4 facing each other on four sides or four sides around a rectangular bottom panel 3 which is the bottom of the tray applied to the present invention, and side panels 5 and 5 similarly. The panels are extended, and the following folding flaps are formed on both edges of each panel.

First, the gable-faced panel 4 having a flap extending to form the columnar (= post-shaped) space 2 will be described. As shown in FIG. 4 (A), three folding flaps 2a to 2c are sequentially provided on both edges of the panel 4 through ruled lines, and these flaps are sequentially arranged inward as described later. After being folded, the entire panel 4 is erected at a right angle to the bottom plate panel 3 to assemble the tray with a post, which is the object of the present invention.

Referring to the side panel 5 located adjacent to the end face panel 4, this panel is located at a position such that it covers the outer surface of the post portion 2 of the end face panel as shown in FIG. 1 when assembled. In the illustrated example, the flaps 5 provided on the edges of the central portion of the side panel 5 before the panel 5 is raised at a right angle.
It is configured such that a is turned inward by 180 ° and fixed to the inner surface of the panel.

Next, the construction of the box making machine itself will be described based on the embodiment shown in FIGS. FIG. 5 is a front view of the box making machine, and FIG. 6 is a side view of the box making machine. In the figure, reference numeral 10 is a blank sheet magazine rack, and 11 is a blank sheet 1a located at the bottom of the rack. Each of them is a conveyor for horizontally transporting one by one, and is composed of a pair of belt conveyors that are provided to face each other in the vertical direction, and the blank is sandwiched between the conveyor belts arranged in the vertical direction, Supplied for the assembly process.

The overall construction of the box making apparatus showing the assembling process is as shown in FIG. 8 (A).
2. Apply the adhesive to the blank sheet at the predetermined position.
And the next stage of the adhesive applying device that consists of the subsequent four circumferential panel startup device 14. First, the flap folding device 12 at the front stage will be described. This device is a device for folding flaps provided on both end edges of the end face panel 4 formed in the blank 1a. The two pieces (2a and 2b) of (1) and (2a and 2b) are united to stand up at a right angle. That is, it is composed of a horizontally moving cylinder 12b equipped with a folding roller 12a that is in contact with the flap, and a cylinder 12c that supports the cylinder 12b together with the roller and is movable in the vertical direction. The folding roller 12a is the flap 2a.
And 2b are folded up so that they stand up at a right angle to the end face panel 4.

[0015] The folding device 12, from the relationship panel 4 is present two, that on both sides is provided one by one each group, and in the meantime, reversing apparatus of the flap indicated by reference numeral 12d is been found provided There is. Note that the reversing device is one in which the flaps 5a provided on both end edges of the side panel 5 are folded back by 180 ° to obtain the state shown in FIG. 4B.
The configuration of 2d is exactly the same as that of the folding device 12, and the folding state of the flap can be controlled by adjusting the movement of the cylinder in the device, mainly the stroke. In the illustrated example, the device 1
2d is used to process the flap 5a provided on the edge of the panel 5 in a state of being folded back 180 °.

Incidentally, in the illustration of the folding device 12 and the reversing device 12d, only the devices located on one side of the blank are drawn, but in an actual machine, these devices are arranged on both sides of the blank. Then, the blank 1 is processed into the folded state shown in FIG. 4 (C) through the apparatus.

Thus, the blank 1 is kept folded in the state of FIG.
The conveyor means at that time is, as an example, a chain conveyor 1 with a pushing claw shown in FIGS.
3 is used. By the way, in the figure, the pushing claw 13a moves the blank to the position of the panel rising device 14 of the next stage while pushing the rear end edge of the blank 1.

Next, the four-round panel start-up device 14 will be described. As shown in FIGS. 6 to 8, this device includes a vertically movable mandrel 15 provided substantially in the center of a machine frame 14a of the device, a fixed or semi-fixed guide member 16 for receiving the mandrel, and further the mandrel. A holding cylinder 14d that is located in front of and behind and temporarily holds the flap 4a of the blank 1 is provided. Reference numeral 14c is a guide plate that supports the supplied blank from below.

The mandrel 15 has a flap holding arm 15a built-in, and an actuator 1 for rotating the support shaft of the flap in the range of 90 ° by air as an example.
5b, the boundary between the flaps 2a and 2b extended from the end face panel 4 (see FIG. 8A).
8 (see FIG. 8B) so that it is temporarily pressed in from above. As a drive source for the arm, in addition to the actuator described above, as shown in FIG. 9 (C), the support shaft of the arm 15a is connected to the working shaft of the cylinder 15d via the connecting rod 15c, and the arm is reciprocated by the cylinder. It is also possible to rotate 15a.

Regardless of which mechanism is used, the holding arm 15a is always kept inside the mandrel 15 and if necessary, this arm is moved outward from the side surface of the mandrel. Make it appear and disappear,
The flap 2a supplied just below the arm is rotated so as to be pressed down from above while folding along the ruled line.

Next, the relationship between the mandrel 15 and the fixed guide member 16 that removably receives the mandrel will be described. As shown in FIGS. 6 to 7, the mandrel 15 is attached to the upper frame 14b of the frame 14a in a suspended state. That is, this mandrel is mounted on the upper frame 14b through the upper mounting substrate 15e, and at this time, the substrate 15e is a small-stroke cylinder provided between the substrate and the upper frame 14b. It is indirectly mounted via 15f and a large stroke cylinder 15g. Therefore, in the mandrel 15, when the small cylinder 15f is operated first, the mandrel 15 has a symbol X in FIG.
The mandrel 15 is lowered by a distance indicated by, and then the large cylinder 15g is operated to lower the mandrel 15 to a position where the distance indicated by the symbol Y in FIG.

When the mandrel is a male member, a fixed guide member 16 functions as a female member corresponding to the male member. This product has a rectangular tubular shape as a whole corresponding to the outer shape of the mandrel. Explaining in detail, the guide member is composed of a total of four guide plates 16a, 16a corresponding to the four-circumferential panel of the tray to be boxed, and 16b, 16b as well, each of the guide plates facing each other. or curving only outward in the upper (refer to FIG. 8 (B)), or as shown in FIG. 7, formed into so that an upward tapered surface is formed, and members connected to it, this It is composed of a flat plate extending vertically. The reason why the guide member is opened in the upward trumpet shape as described above is to facilitate the entry of the mandrel or the tray being assembled from above. Note that the guide plates adjacent to each other have different heights, and are provided with a height difference as indicated by a symbol L in FIG. 8B.

[0023] In addition, the guide plate 16a, placed 16b
In each case, a cylinder device for adjusting the distance Z between the plane-symmetric guide plates is provided behind the tray, so that the tray inserted from above is pressed from the outside through this device and This is because the mandrel 15 receives the load and ensures the gluing of the tray.

In addition to the above, the following accessory devices are attached to the four-round panel start-up device 14. The auxiliary equipment for folding the flaps 2a to 2c of the end face panel 4 is a reverse folding device 14e, which is arranged on both sides of the mandrel, and has a shaft bar 14g from which a claw 14f projects. By rotating around the shaft rod, the flap 2a is bent as shown in FIGS. 4 (C) to 4 (D).
That is, once the flap is folded back in the opposite direction (outward), the degree of freedom in bending the flap portion is increased.

At the position where the flap 2a is supplied, the cylinder 20 for folding the middle flap 2b portion adjacent to the flap 2 further inward in a U-shape.
However, it is provided for the front and rear, right and left of the mandrel by the number of the flaps, and the boundary between the middle flap 2b and the flap 2a of the end face panel 4 is temporarily restrained from above to fix the fold line. A cylinder 21 is attached.

A belt conveyor 22 for ejecting the trays made from the box is provided directly below the mandrel 15.

[0027]

In the apparatus of the present invention, as shown in the operation flow chart of FIG. 4 (A), the blanks S accumulated in the magazine denoted by the reference numeral 11 are sequentially fed from the one placed at the bottom. Folding device 12 of this machine via belt conveyor 11
And is supplied toward the four-circle panel launching device 14 arranged adjacent to it. By the way, although not shown, for example, a hot-melt adhesive is applied in a streak shape at a predetermined position on the bottom panel of the blank and the flaps of the respective side surfaces or the end surface panel at the time of supply. Further, when the blank S is supplied to the portion of the folding device 12, the flap 2a is L-shaped as shown in the drawing while being sucked downward by the suction pad 11a at that position and being held at the predetermined position. Stand up and at the same time place the center part 5a of the side panel at 1
It is folded back 80 degrees and fixed to the inner surface of the tray.

The blank having the above-described configuration is then introduced into the next four-circle panel raising device 14 via the conveyor 13 having the pushing claws 13a, and then each panel 4 constituting the tray. 4 and 5, 5 are bottom panels 3
Stand up at a right angle to the four walls of the tray. The details will be described below.

In FIG. 8 (A), when the blank 1 is supplied to the portion indicated by the reference numeral 14, first, the holding cylinder 14d existing in the portion operates so as to temporarily hold the flap 4a of the blank 1. At the same time, the mandrel 15 performs the first-stage descending operation from the above to hold the blank in the state shown in FIG. 4 (C). In such a state, the reverse folding device 14e arranged at the positions of the flaps 2a to 2c is actuated, and the claws 14f of the device swing the flap 2a left and right around the ruled line to create a crease. As a result, the degree of freedom in folding the paper through the ruled lines is increased.

Then, the cylinder 20 for folding the inner flaps 2b, 2c adjacent to the flap 2a further inward is operated to fold the flap 2c into a triangular cross section as shown in FIG. 8 (A). After that, the temporarily holding cylinder 21, which is separately provided, projects downward obliquely from the upper side, so that the flap portion is held at the tip of the operating shaft of the cylinder.

Thus, the flaps 2a to 2c of the blank end face panel 4 are shown in FIG. 8 (A) and FIG.
It is put in the folded state as shown in (F). At that time, according to the present invention, since the rotatable flap pressing arm 15a built in the mandrel 15 projects from the side wall portion of the mandrel and presses the flap portion from above along the ruled line, a crease is formed beforehand. Even if it is not attached, it can be folded smoothly and accurately.

After the above-mentioned state is temporarily maintained, the mandrel 15 subsequently moves to the second stage of lowering operation. That is, the large cylinder 15f mounted above the mandrel 15 operates to move the mandrel downward, and accordingly, the blank 1 arranged outside the mandrel is pushed downward together with the mandrel. Then, the tray which is being assembled according to the lowering operation of the mandrel is a guide member 16 which is spread downward in a trumpet shape.
Entering the inside of the tray and holding the tray from the outside, the four peripheral panels of the tray that descends along with it are started up at the same time, and at the same time, the four walls of the tray are separated by the adhesive pre-applied to each part. The trays are fixed to each other to form a box-shaped tray.

Panels 4, 4 and 5, as described above,
Each guide plate 1 which constitutes the guide member 16 when 5 stands up
6a and 16b are cylinders 16c provided behind them
The panel of the tray is gradually pressed from the outer side to the inner side via the to enhance the adhesive effect of the above-mentioned adhesive. Thus, the tray which has been completely adhered is released from the pressure by loosening the cylinder 16c, and falls freely. By permitting the above, the transfer is transferred to the upper surface of the belt conveyor 22 for discharge located at the bottom.

[0034]

According to the present invention, when making a tray or a carton case in which paperboard or corrugated board having relatively high rigidity is used as a paper, the preliminary folding habit imparted to the paper, which was conventionally required, is eliminated. Since it can be folded directly and accurately without going through such a peculiar folding device, it becomes a space-saving box making device, and since it is possible to make accurate folding at the time of box making, defective products such as adhesive peeling can be avoided. It has the effect of preventing the occurrence.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a tray applied to a box making machine of the present invention.

FIGS. 2A to 2B are perspective views showing a conventional device for imparting a folding habit to a sheet during box making and a perspective view showing an example of a blank sheet folded by the device. is there.

FIGS. 3A to 3D are operation explanatory views showing a main part of the conventional apparatus.

FIG. 4 is a perspective view showing a blank sheet of a tray manufactured by the apparatus of the present invention, and showing a sequence in which flat sheets are sequentially folded to form a three-dimensional tray.

FIG. 5 is a front view of the box making machine of the present invention.

FIG. 6 is a side view of the box making machine.

FIG. 7 is a rear view of the same.

FIG. 8 is a conceptual perspective view showing a relative positional relationship between a flap folding device and a panel raising device of the same device as a perspective view showing a main part of the present invention.

FIG. 9A is a plan view showing an outline of a flap pressing arm housed in a mandrel in the box making machine of the present invention, FIG. 9B is a side view, and FIG. 9C is a modified example. It is a side view shown.

[Explanation of symbols]

1 blank sheet Column space of 2 trays 2a to 2c Folding flap 3 Tray bottom panel 4 wife side panel 5 side panels 9a-9e Tapered roller 10 magazine rack 11 conveyor 12 flap folding device 12a Folding roller 12b Horizontal movement cylinder 12c Vertical movement cylinder 12d flap reversing device 13 Chain conveyor 13a Pushing claw 14 Four-round panel startup device 14a Machine frame 14e Reverse folding device 14f nail 14g shaft rod 15 Mandrel 15a flap pushing arm 15b actuator 15e substrate 15f small cylinder 15g large cylinder 16 Guide member 16a-16b Guide plate 20 Folding cylinder 21 Temporary holding cylinder 22 Discharge conveyor

─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Shoichi Kawase 5-12-8 Ginza, Chuo-ku, Tokyo Oji Paper Co., Ltd. Packaging System Department (72) Inventor Tetsuo Murakami 300 Hiragaki, Fuji City, Shizuoka Oji Koei Co., Ltd. Fuji Works (56) References JP-A-9-239870 (JP, A) JP-A-8-224806 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B31B 7/00 B31B 1/00

Claims (3)

(57) [Claims] 1. A side panel on four sides of a rectangular bottom panel.Oh
AndExtend the wife side panel,In addition, a columnar sky is placed on the gable side panel.
Blank sheet with extended flaps to form spaces
Reinforced pos consisting of columnar spaces with triangular cross-sections at the four corners
Tray withIn the box making machine that assemblesFront flap folding device for folding flaps
When, Apply the adhesive to the specified position on the blank sheet.
Adhesive coating device, Rear stage for starting up the side panel and gable panel
It has a four-round panel startup device and The next-stage adhesive coating device forms a columnar space with a triangular cross section.
Adhesive for later bonding, side panels and end faces
Has a mechanism to apply both adhesives to join the flannel
Then The rear four-round panel startup device is Push down the bottom panel
A rectangular mandrel (15) that can be raised and lowered for lifting
Fixed guide member (1
6) and And of the mandrelLocated on two opposite sides from the side
Rotates freely outwards and outwards, adjacent to the gable panel
Temporarily press the flap to form the columnar space
The flap presser arm (15a) is placed in the mandrel
To beBox making machine characterized by. 2. The box making machine according to claim 1, wherein the mandrel can be raised and lowered in two steps via a cylinder. 3. The box making machine according to claim 1, wherein the flap pressing arm built in the mandrel is mounted so as to be rotatable outward by an actuator within a range of 90 degrees.