JPS6317685B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic packaging machine, and more particularly to an automatic packaging machine used for unrolling bulky products such as paper bags.

Paper bags and the like are often wrapped in unrolled packaging in units of, for example, 100 sheets. This unwrapped packaging process is a relatively simple process, and in the past, it was mostly labor-intensive. In addition, some parts of the packaging process may be mechanized, and mechanical work and labor-based work are combined. There were also situations in which semi-packed items that had passed through were temporarily re-stored in warehouses.

The present invention was made in view of the above problems, and aims to integrally mechanize the unrolled packaging process, save space for storing relatively bulky bags, etc., and reduce packaging costs. It is something.

The above object is achieved by an automatic packaging machine according to the present invention having the following configuration. That is, the automatic packaging machine according to the present invention is equipped with an unwrapped mechanism that unwraps the objects to be packed, which are accumulated in a substantially rectangular parallelepiped shape, using a continuous sheet-like wrapping paper that is wider than the unwrapped wrapping paper, and the unwrapped mechanism has Lifting the object to a predetermined height while engaging the continuous sheet-like wrapping paper from below the continuous sheet-like wrapping paper, and surrounding the object to be packed in a substantially U-shape with the continuous sheet-like wrapping paper. and a lifting means that, when the lifting means reaches a predetermined height, enters the bottom of the object in a horizontal direction while engaging the upper surface of the continuous sheet-like wrapping paper and lifts the continuous sheet-like wrapping paper from the continuous sheet-like wrapping paper. a bottom member capable of forming a free wrapping paper surrounding an object to be packaged; and means for closing and separating the free wrapping paper from a continuous sheet of wrapping paper, and further operating substantially horizontally. a folding mechanism that is connected to the unrolling mechanism via a transfer means that bends the excess portion of the wrapping paper on both sides of the object to be packed from all sides along the end surface of the object to be packed; a strap hanging mechanism for hanging a string across the end face, the bending mechanism and the strap hanging mechanism have a common horizontal table, and the strap hanging mechanism is formed in a loop shape on the horizontal table. The folding mechanism includes a plurality of folding members arranged opposite to each other with the string guide member at the center, and the folding member is arranged so that the object to be packed is wrapped in the unwound mechanism. The first member is retracted to an upper position when being transferred from the base to the horizontal table, and is returned to a predetermined height position when folded to perform a horizontally opposing movement.
a pair of members and a second pair of members that move up and down, and a second pair of members that move up and down and are retracted to a position below the table when the object to be packaged is transferred from the unwinding mechanism to the horizontal table, and are arranged in a predetermined position when folded. and a third pair of members that can be raised to a height position.

In the operation of the automatic packing machine with this configuration,
First, the item to be packaged is unwrapped using a wider continuous sheet of wrapping paper. In order to carry out this unrolling, it is sufficient to place the article to be packed onto a lifting means formed by, for example, an air cylinder, and this lifting means then moves the article to be packed into a continuous sheet of wrapping paper. The continuous sheet-like wrapping paper is engaged from below and lifted to a predetermined height, so that the continuous sheet-like wrapping paper surrounds the article in a substantially U-shape. If an air cylinder that operates downward is provided opposite to the lifting means, the object to be packed can be compressed and surrounded in a substantially U-shape.

At this time, a bottom member using, for example, a rotatable roller enters the bottom of the object to be packed in a horizontal direction while engaging with the top surface of the continuous sheet of wrapping paper, and the object to be packed is shaped into a substantially U-shape. The wrapped continuous sheet-like wrapping paper further completely surrounds the object to be packed, thus forming an unwound part of the wrapping paper around which the object to be packed is wound. The wrapper section is closed to maintain the looped wrapper configuration and separated from the continuous sheet wrapper. The unwound article to be packaged is transferred almost horizontally onto the horizontal table of the folding mechanism and the strapping mechanism. At this time, the folding members to be engaged with the end faces of the object to be packed are respectively retracted to the upper and lower retracted positions so that they do not obstruct the passage of the excess wrapping paper on both sides of the object to be packed. . Then, after the object to be packaged has reached a predetermined position on the horizontal table, the folding member is brought to its original position and is further given the necessary movement for folding. This bending action causes a pair of folding members to be actuated horizontally inward, and another pair of folding members on either side of the string guide member are actuated downward and further below the horizontal table. Furthermore, another pair of bending members is actuated upward. Stringing is performed after the bending is performed. In this series of operations, the operator only has to place the object to be packed onto the lifting means, and even bulky objects can be automatically packed.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a paper bag manufactured at a bag-making factory. The paper bag 1 has a handle portion 2. As shown in FIG. 2, such paper bags 1 are stacked, for example, in four bundles of 25 sheets each, alternately on the handholding section 2, and are used as objects 3 to be packed. That is, the carrying portion 2 enters inside the end surface of the object 3 to be packed, and the paper bags are stacked so that the bottom part protrudes outward, so that the end surface of the object 3 to be packed is generally laid flat. Although the object to be packed 3 is not necessarily limited to the above-mentioned object, the present invention is applicable to objects whose external shape is approximately a rectangular parallelepiped.

To briefly describe the unwrapping and packing process by the automatic packaging machine of the present invention, the article to be packed 3 is unwrapped by a wamp (wrapping paper) 4 as shown in FIG. 3a.
The unwound wamp 4 has a wider portion 5 than the article 3 to be packaged, as shown in FIG. 3a. Then,
The wide part 5 of the wamp is bent inward from all sides along the end surface of the object to be packaged (FIG. 3b). A string 6 is hung at right angles to both bent ends (FIG. 3c).

FIG. 4 is a front view showing an embodiment of the automatic packaging machine of the present invention, in which the automatic packaging machine 10 has a base frame 1 indicated by a solid line.
1, various packaging elements are attached to the base frame 11 as shown by broken lines, and the object to be packed 3 is inserted into the packaging machine 10 at the position shown at 12, and unwound at the position shown at 13. (Fig. 3a), transported along the arrow shown at 14, and bent and hung with a string at the position shown at 15 (Fig. 3b, c).

Fig. 5 is a schematic diagram of the packaging elements of the automatic packing machine shown in Fig. 4, and each element is shown in the base frame 1 of Fig. 4.
Attached to 1. First and second air cylinders 20 and 21 are provided above and below the unwinding position indicated by 13. The first air cylinder 20 operates upwards and is fitted with a horizontal first plate 23. The second air cylinder 21 operates downwardly and is fitted with a second horizontal plate 24.

A movable body 26 that engages with the first plate 23 and is slidable in the left and right directions shown in the figure is provided, and a third plate 27 is mounted on the movable body 26. The movable body 26 has a third plate 27 thereon.
is elongated so that it can be moved between the insertion position 12 and the unwound position 13 below. Movable body 2
6 is the rod 2 of the horizontally arranged third air cylinder 28;
It engages with a vertically extending movable member 31 whose lower end is fitted into a locking piece 30 at the tip of the locking piece 9 . The movable member 31 consists of a pair of rods, which are slid in a direction perpendicular to the plane of the paper. On the other hand, a stopper plate 32 is arranged opposite to the movable member 31 so as to be freely adjustable.

Wamp rolls 33, 33' are attached, and one side of these rolls is polyethylene laminated so that they can be heat-sealed. The sheet is stretched in the longitudinal direction near the unrolling position 13 as shown at 34. stretched sheet 34
A horizontally longitudinally movable bottom member 35 is provided above the fourth cylinder 36 and is connected to the fourth cylinder 36 . Bottom member 3
5, a series of rollers 37 are arranged in a direction perpendicular to the plane of the paper, and these rollers 37 are rotatable when moving toward the left in the figure, and conversely rotate clockwise when returning to the right. ing. For the bottom member 35, a known roller device that reverses the direction of rotation can be used. The upper surface formed by these rollers 37 is arranged to have a height relationship that matches the upper surface of the third plate 27 when the first cylinder 20 is in the upper limit state of operation. A lower mold 38 for heat sealing is installed at one end of the bottom member 35. The bottom member 35 is moved to the left by the operation of the fourth cylinder 36, and when it reaches the left end position, a pair of upper molds 39 for sheet sealing engage with the lower mold 38 described above.
A cutter 40 is provided between the pair of upper molds 39.
will be provided. These upper mold 39 and cutter 40
are each driven in the vertical direction by a mechanism not shown. Further, in front of the upper mold 39, a guide plate 41 is provided that extends in the vertical direction.

Approximately in the center of the machine there is a piston rod 4 of a fifth air cylinder 42 which can be actuated in the longitudinal direction of the machine.
A movable body 44 carried at the tip of the cylinder 3 is disposed, and a sixth air cylinder 45 that can be operated in the vertical direction is attached to the movable body 44. Sixth air cylinder 45
A transfer member 46 is attached to the piston rod, and the positional relationship and cooperative relationship between the transfer member 46 and the bottom member 35 allow the packaged object 3 to be moved to the unwound position 13.
It is now possible to transfer it from the bending position 15 to the bending position 15.

At the bending and strapping position 15, there is provided a position for bending the surplus portion 5 in the width direction of the wamp 4 (Fig. 3) from all sides along the end face of the object to be packed 3, that is, a plane parallel to the plane of the paper in Fig. 5. Elements are provided symmetrically on both sides of the packaged item 3 (only one element is shown in the figure).
Each element includes a pair of trapezoidal plates 47 that are movable from above to below, trapezoidal horizontal plates 48 and 49 that are movable horizontally from outside to inward, and a pair of round bars that are movable from below to above. These plates consist of 7th, 8th, 9th and 50th plates.
10 air cylinders 51, 52, 53, 54 are connected to the piston rods, respectively. It should be noted that the trapezoidal plate 47 and the round bar 50 are each separated to form a vertical space. A string guide member 56 of the string hooking mechanism 55 is provided so as to cover the space between them in a loop shape in a direction perpendicular to the plane of the paper. The string hooking mechanism 55 and the string guide member 56 may be of a well-known type that hooks the string in a loop shape. Strap hanging mechanism 5
A table 57 is mounted on the base 5 so as to be flush with the upper surface of the bottom member 35 described above. When the round rods 50 are at their lower end positions, they are inserted into the longitudinal grooves provided in the table 57.
7. The position is lower than the top surface of 7. or,
Attached to the round bar 50 is a rubber tape or a piece of cloth 58 (FIG. 6d), one end of which is secured to a spring. or,
Trapezoidal plate 47 and horizontal plates 48, 49
Further, these driving cylinders are integrally mounted so as to be movable in the vertical direction by an eleventh air cylinder 59.

Next, the operation will be explained. For example, the objects 3 to be packaged accumulated as shown in FIG. 2 are fed onto the third plate 27 at position 12 in FIG. 5 in an orientation rotated 90 degrees from that in FIG.

The subsequent operations are performed in sequence. A switch (not shown) is turned on. Next, the pair of movable members 31 are moved so as to approach each other in a direction perpendicular to the plane of the drawing, and serve as a back plate for the object to be packed 3. When the third cylinder 28 is actuated, the movable member 31, the third plate 27, and the movable body 26 move together to the right while sliding on the first plate 23, and the tip of the object 3 to be packed is stopped. It stops when it hits the pump plate 32. Next, when the first cylinder 20 and the second cylinder 21 are actuated, the third plate 27, the movable body 26, and the first plate 23 rise, and the upper surface of the object to be packed 3 lifts the sheet 34 upward and moves to the second cylinder 21. It hits plate 24. First air cylinder 20
When the air pressure of the second air cylinder 21 is made relatively larger than the air pressure of the second air cylinder 21, the first plate 23 pushes up the second plate 24 while compressing the packaged object 3, and the upper surface of the third plate 27 moves to the movable bottom member. It stops when it becomes flush with the top surface of 35. At this time, the sheet 34 covers the object 3 to be packed in a U-shape. Note that the fourth cylinder 36 is used for the object 3 to be packed.
They are placed sideways from the path of the road, so they never come into contact with each other.

Fourth cylinder 36 is then actuated. The bottom member 35 is driven while pushing the third plate 27 and the movable body 26 to the left in the figure. At this time, the object to be packed 3 is prevented from moving to the left by the guide plate 41, and the roller 37 at the top of the bottom member 35 closes the left side of the U-shape of the sheet 34 while closing the remaining U-shaped side of the sheet 34. The roller 37 rotates along the lower surface of the object to be packed 3 and receives it, and the bottom member 35 stops at a position where the lower die 38 and the heat sealing upper die 39 correspond. Thereupon, the upper mold 39 is lowered toward the lower mold 38 to perform heat sealing of the two strips, and the cutter 40 cuts the middle of the two strips. This completes the ring-shaped unwound, and both ends of the unwound wamp are joined by heat sealing, while the sheet 34 is also joined by heat sealing to form a continuous sheet as shown in the figure. Both rolls 33 and 33' are consumed by the unwinding process, but the consumption of the lower roll 33' is somewhat greater.

When the free winding is completed, the mechanism described so far is returned to its initial position and preparations can be made for feeding the next article 3 to be packaged.

As described above, the rollers 37 of the bottom member 35 rotate freely when moving to the left, so they can be easily moved to the left along the bottom of the item 3 to be packed, and
When the roller 37 returns to the right, the roller 37 rotates clockwise to place the unwound article 3 thereon and carry it further forward. Therefore, the unwound article 3 to be packaged is on the bottom member 35 in the position shown in FIG. At this time, the state of the unwound packaged object is the same as that shown in FIG. 3a. Next, the sixth cylinder 45 is actuated to lower the transfer member 46, and the fifth cylinder 42 is subsequently actuated to bend the object 3 to the folding position 1.
Transfer to 5.

Subsequently, both ends of the wamp of the article to be packaged 3 are bent and a string is attached. First, the 11th cylinder 59
The trapezoidal plate 47, the horizontal plates 48, 49, and their drive cylinders are lowered into predetermined positions. Then, as shown in FIG. 6a, when the eighth and ninth cylinders 52 and 53 are operated and the horizontal plates 48 and 49 are driven from outside to inside, the surplus portions 5 at both ends of the wamp is first bent inward along the vertical sides.
Then, when the pair of seventh cylinders 51 is actuated and the pair of plates 47 having a substantially trapezoidal outer shape are driven downward (FIG. 6b), the wamp end 5 is moved toward the previously driven horizontal plate 48, 49 along the horizontal upper side. Subsequently, when the tenth cylinder 54 is actuated, the round bar 50 is driven upward (FIG. 6c), bending the remaining portion of the wamp end 5 upward. This completes the bending as shown in Figure 3b. What should be kept in mind is the shape of the round bar 50, which is designed so that when the object 3 to be packed is transferred along the top surface of the table 57, the excess part 5 of the wamp, which is wider than the object 3 to be packed, can be smoothly moved without damaging it. be placed below the top surface of the table 57 in order to slide it into position, and be particularly narrow in the vertical direction so that it can be easily driven;
A rubber tape 58 is bonded to this. As a result, even if the length h (FIG. 6c) of the surplus portion of the wamp changes, it can be bent by the round bar 50, and this end can be held down by the rubber tape 58, especially when h is short. This is how it is becoming.

Next, the trapezoidal plate 47 and the horizontal plates 48, 49 are returned to their original positions, and while the ends are held down by the round bar 50 and rubber tape 58, stringing (FIG. 6d) is performed. As for the string hanging, a well-known string hanging mechanism can be adopted. Subsequently, when the 10th cylinder 54 and the 11th cylinder 59 are released, they are all returned to their original positions. The item 3 to be packed, which has been completely tied, is pushed out by the next item to be packed, and is sent to a conveyor and sent to a shipping position.

As explained above, according to the present invention, the steps of wrapping the object to be packaged, bending the end of the wamp, and stringing can be performed in a single machine. It is clear that this saves effort. Furthermore, it is possible to save the labor and space needed to temporarily store intermediate packaging products, which would be unavoidable if, for example, the process before the unrolling process is mechanized and the subsequent process relies on labor. Furthermore, if the unrolling process includes compression, it becomes suitable for packaging not only bags but also relatively bulky items.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a paper bag, Fig. 2 is a perspective view of an object to be packed, Fig. 3 is a perspective view illustrating the packing process according to the present invention, Fig. 4 is a front view of an embodiment of the present invention, and Fig. 5 is a perspective view of a paper bag.
The figure is a schematic diagram for explaining the mechanical part of FIG. 4, and FIG. 6 is a schematic diagram for explaining the folding and strapping process. 1... Paper bag, 3... Item to be packed, 4... Wump,
5... Wamp surplus portion, 6... String, 12... Supply position, 13... Unrolling position, 14... Transfer direction, 1
5... Bending string hooking position, 23, 24, 27... Plate, 26... Movable body, 33, 33'... Roll for wamp, 35... Bottom member, 46... Transfer member, 47, 48, 49,50...Bending member,
55...String mechanism, 58...Rubber tape.

Claims (1)

[Claims] 1. Equipped with a free-winding mechanism for unwrapping objects to be packed that are accumulated in a substantially rectangular parallelepiped shape using a continuous sheet-like wrapping paper having a wider width, and the unwinding mechanism unwinding the objects to be packed into the continuous sheet-like wrapping paper. Lifting means capable of engaging the continuous sheet wrapping paper from below and lifting it up to a predetermined height so that the continuous sheet wrapping paper surrounds the article in a substantially U-shape;
When the lifting means reaches a predetermined height, it enters the bottom of the object to be packed in a horizontal direction while engaging the upper surface of the continuous sheet-like wrapping paper, and surrounds the object to be packed from the continuous sheet-like wrapping paper. a base member capable of forming a free wrapper, and means for closing and separating the freewrap from a continuous sheet of wrapping paper; a folding mechanism that is connected to the unwinding mechanism and bends the excess wrapping paper on both sides of the object to be packed from all sides along the end surface of the object to be packed; The bending mechanism and the string hanging mechanism have a common horizontal table, and the string hanging mechanism has a string guide member formed in a loop shape on the horizontal table. and the folding mechanism includes a plurality of folding members arranged opposite to each other with the string guide member at the center, and the folding members are configured to move the object to be packed from the unwrapped mechanism to the horizontal table. A first pair of members that is retracted to an upper position when being transported and returned to a predetermined height position when folded to perform horizontally opposing movements, and a second pair of members that performs vertical movements; a third pair of members that can be evacuated to a position below the table when the object to be packed is transferred from the unrolling mechanism to the horizontal table and can be lifted to a predetermined height position when folded; An automatic packing machine comprising: