JPH0511132Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention consists of a magazine that holds a large number of stacked flatly folded cartons, and a suction cup that picks up and takes out cartons one by one from the magazine at a predetermined position from the magazine. A rotating transport mechanism that moves the carton along a trajectory to the transport path, a transport mechanism that transports the rectangularly opened carton along the horizontal transport path toward the cartoning machine, and a transport mechanism that transports the square-opened carton along the horizontal transport path in the opposite direction to the folding direction in which it is folded in the magazine. Equipped with a reverse folding means for folding the carton in reverse, and a re-opening means for compressing and re-opening the carton in the transport direction, the carton taken out from the magazine as the suction cup moves is transferred to the transport path along the movement trajectory of the suction cup. The present invention relates to a carton assembly device that opens a rectangular carton on a conveyance path while moving, and reversely folds the opened carton while conveying it along the conveyance path to reopen the open carton.

<Prior art> Conventionally, as a carton assembly device of this type, as disclosed in Japanese Patent Application Laid-Open No. 61-60420, a rotary conveying mechanism has three planetary gear trains meshing with the outer periphery of a fixed gear. A suction cup is connected to the outer end gear of each planetary gear train, and a large number of pushers are set up at equal intervals by the width of the cartons in the conveying direction on a chain conveyor driven in synchronization with the rotary conveying mechanism. Each planetary gear train rotates along the outer periphery of the fixed gear to move each suction cup in a substantially equilateral triangular adduction trochoid locus, thereby sucking a carton from the magazine at its first vertex. At the same time, the folded edge of the carton is brought into pressure-sliding contact with a pusher moving horizontally at a constant speed at the second vertex, and the carton is gradually opened.The adsorption of the carton is released, and the adjacent pushers are used to pull the carton on both sides. Some products are transported to a packaging machine while being held upright by sandwiching the sides.

Furthermore, as disclosed in, for example, Japanese Patent Laid-Open No. 59-26833, the rotary conveyance mechanism changes the top portion of the carton introduction into a substantially U-shape using a cam mechanism, thereby reducing the time required to introduce the cartons onto the conveyance path. There are some that can be doubled for faster speeds.

Furthermore, as disclosed in Japanese Patent Publication No. 61-41811, for example, a rotary conveying mechanism has a suction cup and a suction device that suck the adjacent surfaces of cartons disposed in close proximity, and a carton is taken out from a magazine using the suction cup. Later, by adsorbing the suction device and positioning it at right angles to the suction cup, the carton is forcibly opened into a rectangular shape, and the carton is sandwiched between the pushers of a chain conveyor that moves horizontally at a constant speed, allowing the carton to be conveyed while being held upright. be.

Furthermore, as disclosed in Japanese Utility Model Application Publication No. 59-26709, for example, a carton taken out from a magazine is suctioned and held on a conveyance path by a suction cup, then pushed by a pusher of a chain conveyor, and then moved by an upwardly moved inclined guide. The upper folding edge of the carton is raised and hits the upper stopper, and at the same time, the inclined guide moves downward under the conveyance path.Then, the pusher pushes the carton between it and the upper stopper to open the carton in a rectangular shape. From this state, the swinging lever swings toward the upstream side of the conveyance path and hits the top surface of the opened carton, thereby forcibly folding the carton in reverse. After that, the reversely folded carton is passed between vertically parallel regulation rails that are bent diagonally downward from the lower end of the upper stopper, and the reversely folded carton is compressed to remove the folds. There is something to reopen.

<Problems to be solved by the invention> However, with such conventional carton assembly equipment,
In the case of JP-A No. 41811, it is necessary to accurately match the timing of the movement locus of the folded edge of the carton and the horizontal movement of the pusher of the chain conveyor, so the adjustment work is difficult and troublesome. In the case where the carton is introduced in a short time during the pusher at the apex of the approximately equilateral triangular adduction trochoid locus as in the publication, there is not enough time to completely open the carton into a rectangular opening. There is a problem in that the best opening conditions cannot be expected.

This can be done by lengthening the introduction time of the carton as in Japanese Patent Application Laid-Open No. 59-26833, or by
It is clear from the fact that the carton is forcibly opened in a rectangular shape as in Publication No. 41811, but in these systems, the structure of the rotary conveyance mechanism is very complicated, which not only increases the cost but also reduces the overall cost of the device. There is a problem with increasing the size.

In the case of Utility Model Application Publication No. 59-26709, a carton is sandwiched between a pusher and a stopper to open it in a rectangular shape by vertical movement of an inclined guide, and a swinging lever is abutted against the opened carton to forcibly open the carton. If you attempt to open the carton into a rectangular shape or reverse fold it quickly, excessive force will be applied to the carton and the surface of the carton will be easily damaged, which will reduce the product value and cause a large amount to be folded in a short period of time. It is not possible to reverse fold a carton, it is not suitable for high-speed operation, and the structure is complicated, resulting in high cost and the overall size of the device.

Furthermore, in the case of Japanese Utility Model Application Publication No. 59-26709, the upper stopper and the upper side of the regulation rail that compresses the reversely folded carton are connected, so the vertical height dimension of the carton is changed. Correspondingly, if the distance between the conveyance path and the upper stopper is adjusted up or down, or if the width dimension of the carton in the conveyance direction is changed and the upper stopper is adjusted in the conveyance direction in response to this, the regulation rail will be adjusted. The spacing changes, and the spacing between the regulating rails becomes too narrow to allow the carton to pass through, and the spacing between the regulating rails becomes too wide to reliably compress a reverse-folded carton, which completely eliminates the fold. The problem is that there are things you can't do.

In view of such conventional circumstances, the present invention is designed to reliably open the carton into a rectangular shape by simply moving the carton using a suction cup without interlocking with a moving body, and to smoothly reverse fold the carton by simply transporting it horizontally. The purpose is to reverse fold and compress to a constant state regardless of changes.

<Means for solving the problem> The technical means taken by the present invention to solve the above problem is to erect a fixed inclined guide on the conveyance path so that its inclined surface faces downstream in the conveyance direction, and to The surface is inclined at an angle that gradually approaches and intersects the locus of movement of the lower folded edge of the carton as it moves toward the conveyance path and the downstream side, and the lower side engages with the lower folded side corner of the carton that opens below the sloped surface. A stopper is provided in series, and an upper stopper is provided above the lower stopper on the downstream side in the transport direction and engages with the upper folding side corner of the open carton, and is movable in and out on the movement locus of the upper folding edge of the carton. The reverse folding means is arranged so as to be adjustable in the conveyance direction, and from a position slightly below the upper stopper, the reverse folding means is tilted downward in a direction that gradually approaches a horizontal conveyance path as it goes downstream in the conveyance direction, and moves up and down and in the conveyance direction. The downstream side of the conveyance path located directly below the reverse folding means and the upstream side of the conveyance path where the fixed inclined guide is erected are connected by a horizontal moving member, and the upstream side of the conveyance path is It is characterized by being arranged so that it can be adjusted up and down while keeping its sides horizontal.

<Function> According to the above-mentioned technical means, the lower folding edge of the carton slides into pressure sliding contact with the inclined surface of the fixed inclined guide as the suction cup moves, thereby gradually pressing the carton toward the opening direction. The carton is gradually opened into a square shape, and the lower folding side corner of the opened carton is engaged with the lower stopper to prevent the carton from descending and moving upstream, and at the same time, the upper folding side corner of the opened carton is engaged with the upper stopper. By sandwiching these two diagonally while preventing the folding member from rising and moving downstream, the folding member is held in a rectangular shape by utilizing the reaction force that tries to return to the folding direction.
Thereafter, while the carton is conveyed downstream by the conveyance mechanism against this reaction force, by aligning the upper folding edge with the downwardly inclined reverse folding means, the bottom side of the carton is conveyed downstream first and gradually The distance from the upper surface of the upstream side of the conveyance path to the upper stopper may be adjusted as the vertical height of the carton changes, or the lower stopper may be adjusted as the width of the carton in the conveyance direction changes. Even if the width dimension from to the upper stopper is adjusted, the distance between the downstream side of the conveyance path and the reverse folding means does not change.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In this embodiment, as shown in FIGS. 1 and 3 to 7, a rotary conveying mechanism 2 connects suction cups 2a, 2a, 2a to the outer end gears of three planetary gear trains meshed with the outer periphery of a fixed gear. By configuring the suction cups 2a, 2a, 2a to be moved in a substantially equilateral triangular adduction trochoid locus, the first apex of the suction cups 2a, 2a, 2a is folded flat from the magazine 1 disposed in an inclined manner. The cartons A taken out are suctioned and taken out one by one, and rotated and transferred toward the conveyance path 4. At the same time, the cartons A taken out at the second vertex are brought into pressure sliding contact with the fixed inclined guide 3, and are placed in the suction cup 2a. This is to release the suction.

The fixed inclined guide 3 is located at the upstream end of the conveyance path 4 along the movement locus of the suction cup 2a, that is, from the first apex to the second apex of the internal rotation trochoid locus, and its inclined surface 3a is positioned downstream in the conveyance direction. The sloped surface 3a is tilted at an angle that gradually approaches and intersects the locus of movement of the lower folding edge _A1 of the folded carton A as it goes toward the conveyance path 4 and the downstream side, By moving the suction cup 2a, the lower folding edge _A1 is pressed into sliding contact with the inclined surface 3a, and is gradually pressed toward the opening of the carton A.

Further, below the inclined surface 3a, a vertical surface 3b is provided.
A lower stopper 3' is formed in an L shape from the vertical surface 3b and the upper surface of the horizontal conveyance path 4, and the lower folding side of the carton A opens on the vertical surface 3b and the upper surface of the conveyance path 4. The engagement of the corner portion _A3 prevents its downward movement and upstream movement.

In this embodiment, the fixed inclined guides 3 are arranged in a pair of upstream support portions 4a ₃ and 4a ₃ arranged in the left and right width directions orthogonal to the conveyance direction of the conveyance path 4, which will be described later, so as to be adjustable in the conveyance direction, respectively. The inclination angle of each inclined surface 3a is approximately 25 degrees.

The conveyance path 4 is a horizontal path leading from the fixed inclined guide 3 to the cartoning machine (not shown) side, and runs along the lower surface of the carton A, which is open on the upper surface, and conveys only the lower surface side of the carton A. A conveyance mechanism 4a for conveying to the downstream side in the direction is provided.

The conveyance mechanism 4a is constituted by a belt conveyor having protrusions _4a1 protruding outward at equal intervals, which abut only the lower end of the upstream side surface of the open carton A, and in the case of this embodiment, these conveyors 4a, 4
A pair of guides a are located inside the fixed inclined guides 3, 3.

Each conveyor 4a has a support part on which the drive pulley and the upper pulley are supported, an upstream support part 4a3 where the fixed inclined guide 3 is arranged, and a downstream support part _4a3 located directly below the reverse folding means to be described later. Support part 4a ₂
The upstream support section 4 is divided into two parts in the conveyance direction.
a ₃ and the downstream support portion 4a ₂ are connected via a parallel movement member 4a ₄ such as a parallel link extending in the conveying direction, thereby connecting the upstream support portion 4a ₃ to the downstream support portion 4a ₂
It is supported in a horizontal state together with a fixed inclined guide 3 so as to be vertically adjustable, and is positioned using a fixed handle _4a5 .

In the space above the conveyance path 4, an upper stopper 5 is disposed at a height corresponding to the height of the opened carton A above the lower stopper 3' on the downstream side.

The upper stopper 5 is erected to face a holding claw 5a that is removably disposed on the movement trajectory of the upper folding edge _A2 of the folded carton A, and the upper end of the downstream side surface of the opened carton A. The retaining claw 5a is formed in an L shape from the vertical surface 5b, and is normally protruded on the movement trajectory by an elastic body such as a spring _5c . The holding claw 5a and the vertical surface 5b are engaged with the upper folding side corner portion _A4 to prevent the holding claw 5a and the vertical surface 5b from rising and moving downstream.

Therefore, the upper stopper 5 and the lower stopper 3' close the folding side corners A ₃ and A ₄ of the carton A.
are sandwiched in the diagonal direction, whereby the carton A is held in a rectangular shape by utilizing the reaction force that tries to return to the folding direction.

In this embodiment, the vertical surface 5b of the upper stopper 5 is formed at the upstream end of a pair of parallel mounting plates 5d, 5d disposed in the left and right width directions extending in the conveying direction, respectively.
These mounting plates 5d, 5d have holding claws 5a, 5a.
and a long hole 5 extending in the conveying direction.
d ₁ , 5d ₁ are drilled through and supported via the elongated holes 5d ₁ , 5d ₁ on support portions 6a ₂ , 6a ₂ of a reverse folding means 6, which will be described later, so as to be adjustable in the transport direction.

Further, a reverse folding means 6 is installed along the conveyance path 4 slightly below the upper stopper 5.
The carton A is arranged so as to be inclined downward in a direction that gradually approaches the conveyance path 4 from a slightly lower position toward the downstream side, and when the carton A conveyed by the conveyance mechanism 4a comes into contact with the reverse folding means 6, the carton A
The lower surface side is first conveyed to the downstream side, and the opposing folding side corners A ₃ and A ₄ are tilted so that they gradually approach each other, and the folding direction is opposite to the folding direction in which it was folded in advance in the magazine 1. Fold backwards.

The reverse folding means 6 is constituted by a belt conveyor 6a with a protrusion _6a1 whose upstream side is inclined,
A pair of upper stoppers 5, 5 are respectively disposed on the outside, and the distance between the lower end surface of these reverse folding conveyors 6a, 6a and the upper surface of the transport conveyor 4a, 4a is approximately equal to the thickness dimension of the carton A when folded. By making it the same size, it is folded 180 degrees backwards.

Furthermore, in this embodiment, the reverse folding conveyors 6a, 6a
In addition, crushing rollers 6b, 6b are connected to the reverse folding conveyors 6a, 6a, respectively, on support parts 6a ₂ , 6a ₂ on which these drive pulleys and upper pulleys are supported.
The crushing rollers 6b, 6b press the lower end corner _A5 of the open downstream side of the carton A into a flat shape, and then the carton A is conveyed by the reverse folding conveyors 6a, 6a. This allows the reverse folding to be performed smoothly, but if the reverse folding can be performed only by the reverse folding conveyors 6a, 6a, the crushing rollers 6b, 6b are not necessary.

Further, on the downstream side of the reverse folding means 6, a re-opening means 7 is provided which compresses the reversely folded carton A in the transport direction and opens it into a rectangular shape again.

The re-opening means 7 is connected to the transport conveyors 4a, 4a.
A belt conveyor 7a, 7a with a pair of left and right protrusions _7a1 arranged on the downstream side of the belt conveyor and synchronously interlocked with the belt conveyor 7a.
The re-opening conveyors 7a, 7a are arranged at a falling distance from the descending curved surfaces 7a ₂ , 7a ₂ at the downstream ends of the conveyors 7a, 7a, and a large number of transport claws 7b ₁ are arranged at equal intervals according to the width of the carton A in the transport direction. The discharge conveyors 7b, 7b are erected so as to be freely adjustable in the conveying direction, and the downstream edge A7 for guiding the downstream edge _A7 of the carton A is disposed in a downwardly sloping manner facing the descending curved surfaces _7a2 , _7a2 . Inclined plate 7
The upstream edge _A6 of the carton A, which has been reversely folded by the protrusions _7a1 and _7a1 , is pushed downstream and dropped along the descending curved surface _7a2 , while the downstream edge Carton A ₇ is moved along the inclined plates 7c, 7c and abuts against the horizontally moving conveyance claw _7b1 , compressing the carton A in the conveyance direction to form a rectangular opening, and with the movement of the conveyance claw _7b1. The carton A is conveyed to a boxing machine (not shown) with both sides of the carton A sandwiched between the other conveying claws _7b1 that gradually rise from the upstream side of the reopened carton A.

Further, at the lower ends of the inclined plates 7c, 7c, a horizontal surface 7 is provided between the upper surface of the discharge conveyors 7b, 7b and a distance slightly longer than the vertical height dimension of the re-opened carton A to prevent the carton A from floating up.
c ₁ and 7c ₁ are installed in series.

Then, the above-mentioned pair of left and right conveyor conveyors 4
a, 4a, the reverse folding conveyors 6a, 6a and the re-opening conveyors 7a, 7a are supported by support portions 4a ₂ , 4a ₂ , on which these drive pulleys and upper movement pulleys are pivotally supported.
6a ₂ , 6a ₂ , 7a ₃ , 7a ₃ , the screw shaft 8,
8, 8 in the left and right direction, respectively, and support parts 4a ₂ , 4
A ₂ , 6a ₂ , 6a ₂ , 7a ₃ , 7a ₃ are screwed onto either the left or right side, and these screw shafts 8, 8,
8 is connected to an adjusting means such as a motor (not shown), and the supporting parts 4a ₂ , 4a ₂ , 6a ₂ , 6a ₂ , 7a ₃ , 7
The spacing between a _{and 3} can be adjusted in the left and right directions at the same time.

Next, the operation of such a carton assembly device will be explained.

First, the magazine 1 is moved by the rotation transport mechanism 2.
The carton A folded flat is taken out one by one by suction, and this carton A is shown in Figures 3 to 6.
It is rotated and transferred downward in a substantially equilateral triangular adduction trochoidal trajectory as shown in the figure.

By the time the carton A approaches the second apex of the adducted trochoidal trajectory, the lower folding edge A ₁ of the carton A is aligned with the inclined surfaces 3a, 3 of the fixed inclined guides 3, 3.
a, and as the carton A moves downward, the lower folding edge _A1 is gradually pressed in the opening direction of the carton A, as shown in FIG. 7, so that the carton A is opened into a rectangular shape.

Lower folding edge of carton A gradually opening
By the time _A1 descends along the vertical planes 3b, 3b and the lower surface of the carton A approaches the upper surface of the conveyance path 4, the upper folding edge _A2 is pressed against the holding claw 5 of the upper stoppers 5, 5.
a, 5a are swung out of the movement trajectory of the upper folding edge _A2 and pass therethrough, and the carton A is opened in a rectangular shape.

The square-opening carton A has its opposite folding side corners A ₃ and A ₄ formed by vertical surfaces 3b and 3b and the upper surface of the conveyance path 4, and lower stoppers 3' and 3', respectively, and the lower surfaces of the holding claws 5a and 5a and the vertical It is held in a rectangular shape by utilizing the reaction force of the carton A trying to return to the folding direction by being immovably sandwiched between the upper stoppers 5 and 5 consisting of surfaces 5b and 5b, and at this time, the suction of the suction cup 2a is It will be canceled.

After that, the vertical surfaces 5b, 5 of the upper stoppers 5, 5
While holding the folding side corner A ₄ located at the upper end of the downstream side of the carton A at b, so that it cannot move downstream,
Carton A is transported by driving conveyors 4a, 4a.
Only the lower side of the paper is conveyed to the downstream side first, and is gradually reversely folded so that the above-mentioned two folding side corners A ₃ and A ₄ approach each other. The lower end corner _A5 of the downstream side surface of the carton A is pressed into a flat shape and then conveyed by the reverse folding conveyors 6a, 6a, or the reverse folding conveyors 6a, 6a are directly conveyed by only the reverse folding conveyors 6a, 6a.
6a and the upper surface of the conveyance path 4,
Folded 180 degrees in reverse.

Then, the carton A that has been reversely folded 180 degrees is compressed in the conveying direction by the pushing of the protrusions 7a ₁ and 7a ₁ of the re-opening conveyors 7a and 7a, as shown in FIG. transport claw 7
It is sandwiched between b ₁ and 7b ₁ and is transported and supplied to a packaging machine (not shown).

On the other hand, when the size of carton A is changed, the following adjustment is made to accommodate the change.

First, when the vertical height dimension of the carton A is changed, as shown in FIGS. 9 and 10, the fixed handle _4a5 is released and the upstream support parts _4a3 , _4a3 are moved to the downstream support part 4a. ₂ , _4a By moving up and down while keeping it horizontal, the conveyors 4a, 4a
The holding claws 5 of the upper stoppers 5, 5 from the upper surface of the upstream side of the
Adjust the vertical height dimensions up to a and 5a, adjust by moving the fixed inclined guides 3, 3 in the conveying direction, and adjust by moving the inclined plate 7c in the conveying direction and up and down, and reopen the opening. By moving the protruding positions of the protrusions 7a ₁ , 7a ₁ of the conveyors 7a, 7a in the conveyance direction, the timing between the downstream end of the reopening conveyors 7a, 7a and the conveyance claw 7b ₁ of the discharge conveyor 7b is adjusted.

Furthermore, if necessary, crushing rollers 6b, 6b
Adjust the height position up or down.

In addition, if the width dimension of the carton A in the transport direction is changed, the mounting plate 5 of the upper stoppers 5, 5
By moving the lower stoppers 3' and 5d along the long holes 5d ₁ and 5d ₁ in the conveying direction relative to the support parts 6a ₂ and 6a ₂ of the reverse folding conveyors 6a and 6a,
3' from the vertical planes 3b, 3b to the upper stoppers 5, 5.
The width dimension to the vertical planes 5b, 5b is adjusted, the inclined plate 7c is moved in the conveying direction, and the protruding positions of the protrusions 7a ₁ , 7a ₁ of the re-opening conveyors 7a, 7a are moved in the conveying direction. In addition to adjusting the timing with the conveyance claw 7b ₁ , the conveyance claw 7b ₁ of the conveyor 7b,
7b ₁ , and further adjust the crushing rollers 6b, 6b as necessary.

When the length dimension of the carton A in the left-right direction is changed, by rotating the screw shafts 8, 8, 8 in the forward and reverse directions using the adjustment means, the conveyor 4a,
4a, the left and right intervals of the reverse folding conveyors 6a, 6a and the re-opening conveyors 7a, 7a are adjusted, and in accordance with this, the fixed inclined guides 3, 3 and both upper and lower stoppers 3',
The left and right intervals of 3', 5, and 5 are also adjusted.

<Effects of the invention> Since the present invention has the above configuration, it has the following advantages.

As the suction cup moves, the lower folding edge of the carton comes into sliding contact with the inclined surface of the fixed inclined guide, gradually pressing the carton in the opening direction, so that the carton is gradually opened into a rectangular shape. The folding side is engaged with the lower stopper to prevent descent and upstream movement, and at the same time, the upper folding side corner is engaged with the upper stopper to prevent rise and downstream movement, while moving both in the diagonal direction. The carton is held in a rectangular shape by using the reaction force that tries to return to the folding direction, and then, against this reaction force, the carton is conveyed downstream by the conveyance mechanism and descends the upper folding edge. By placing the carton along the inclined reverse folding means, the bottom side of the carton is conveyed downstream first and is gradually reverse folded, and as the vertical height of the carton changes, the upper stopper is moved from the upper surface of the upstream side of the conveyance path. Even if you adjust the width from the lower stopper to the upper stopper due to the change in the width of the carton in the transport direction, the distance between the downstream side of the transport path and the reverse folding means Since the carton does not change, the carton can be reliably opened into a rectangular shape by simply moving the carton with the suction cup without interlocking with a moving object, and it can be smoothly reverse folded simply by horizontal conveyance, and the state remains constant regardless of changes in carton size. Can be reverse folded and compressed.

Therefore, compared to the conventional system, which requires accurate timing of the movement locus of the folding edge of the carton and the horizontal movement of the pusher of the chain conveyor, this eliminates the need for adjustment work and improves usability. Even when a carton is introduced onto the conveyance path in a short time at the apex of the trochoid locus, a sufficiently rectangular opening can be formed with a simple structure, making the entire device compact at low cost.

In addition, compared to the conventional method in which a carton is sandwiched between a pusher and a stopper to open the carton in a rectangular shape by vertical movement of an inclined guide, and a swinging lever is abutted against the opened carton to force it to fold backwards, the carton can be folded faster. Even if you open the carton squarely or fold it in reverse at the right time, no excessive force is applied to the carton, the surface of the carton is less likely to be damaged, the product value does not decrease, and a large number of cartons can be reverse-folded in a short period of time. In addition to being suitable for high-speed operation, the structure can be simplified, the cost is low, and the entire device is compact.

Furthermore, compared to conventional systems in which the upper stopper is connected to the upper side of the regulation rail that compresses the reversely folded carton, even if the vertical height of the carton or the width in the conveying direction is changed, the carton remains stable. Folding can be completely removed without making the carton passable or changing the amount of compression of the reversely folded carton.

Since the carton is brought into sliding contact with the inclined surface of the fixed inclined guide and is gradually pressed in the opening direction, it is possible to open the carton in a rectangular shape with one fixed inclined guide regardless of changes in the dimensions of the carton.

[Brief explanation of the drawing]

Fig. 1 is a side view of a carton assembly device showing an embodiment of the present invention, Fig. 2 is a cross-sectional plan view showing an enlarged view of the main parts, and Figs. Fig. 7 is a schematic diagram showing a state in which the carton gradually opens as it comes into pressure sliding contact with a fixed inclined guide, and Fig. 8 shows a state in which a reversely folded carton opens again into a rectangular shape. Fig. 9 is a side view showing a state in which the upstream side of the conveyance path is moved up and down in response to changes in the height of the carton, showing only the main parts, and Fig. 10 is an enlarged perspective view of the main parts. It is a diagram. A... Carton, A ₁ ... Lower folding edge, A ₂
...Upper folding edge, _A3 ...Lower folding side corner, _A4 ...Upper folding side corner, 1...Magazine, 2...Rotating conveyance mechanism, 2a...Suction cup,
3...Fixed inclined guide, 3a... Inclined surface, 3'...
...Lower stopper, 4...Transport path, 4a...Transfer mechanism, 4a ₄ ...Parallel movement member, 5'...Upper stopper, 6...Reverse folding means, 7...Reopening means.

Claims (1)

[Scope of utility model registration request] A magazine that holds a large number of stacked flatly folded cartons, a rotary conveyance mechanism that moves a suction cup that picks up and takes out cartons one by one from the magazine from the magazine to a conveyance path along a predetermined path, and a rectangular opening. A transport mechanism that transports the cartons along a horizontal transport path toward the cartoning machine, a reverse folding means that reversely folds the cartons in the opposite direction to the folding direction in which they were folded in the magazine, and a reverse folding means that compresses the cartons in the transport direction. Equipped with a re-opening means for re-opening,
As the suction cup moves, the carton taken out from the magazine is transferred to the conveyance path along the movement trajectory of the suction cup, opening a square on the conveyance path, and the opened carton is reverse folded while being conveyed along the conveyance path. In the carton assembly device for reopening a carton, a fixed inclined guide is erected on the conveying path so that its sloped surface faces downstream in the conveying direction, and the inclined surface is aligned with the lower folded edge of the carton as it moves toward the conveying path and the downstream side. The carton is inclined at an angle that gradually approaches and intersects with the movement locus, and a lower stopper that is opened below the inclined surface and engages with the lower folding side corner of the carton is provided in series, and a lower stopper that engages with the lower folding side corner of the carton is provided on the downstream side of the lower stopper in the conveying direction. An upper stopper that engages with the upper folding side corner of the opened carton is disposed above so as to be movable in and out on the movement trajectory of the upper folding edge of the carton and can be freely adjusted in the transport direction, and slightly below the upper stopper. The reverse folding means is disposed so as to be immovable in the vertical direction and the conveyance direction so as to be tilted downward in a direction that gradually approaches the horizontal conveyance path as it goes downstream in the conveyance direction, and is located directly below the reverse folding means. The downstream side of the conveyance path and the upstream side of the conveyance path where the fixed inclined guide is erected are connected by a parallel moving member, and the upstream side of the conveyance path is arranged to be vertically adjustable while remaining in a horizontal state. carton assembly equipment.