JPH057257B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is a device that automatically binds packaging bags made of polyethylene or the like filled with a predetermined amount of candy, peanuts, etc. at the upper opening using a narrow adhesive tape or the like. belongs to the field of structural technology.

<Summary of the gist> The invention of this application fills products such as candy and peanuts in a predetermined number and weight into packaging bags made of polyethylene or the like using a filling device.
The opening at the top is heat-sealed, and then the sealed part is automatically cut with a cutter, and a rotary binding device is used to create a large number of binding arms, which are rotated under pressure and supported, and the binding machine is used to cut the adhesive tape into a narrow width. This invention relates to an automatic bundling method for packaging bags in which the openings are converged into a fan shape using methods such as the above, and a device directly used in the method. The binding arm is provided to be able to swing freely in the circumferential direction, and the binding machine is provided at the tip of the support arm that swings in the circumferential direction of the set angle, and is linked to the swinging device, and works in cooperation with the binding arm to adjust the set time. This invention relates to an automatic packaging bag binding method that performs a long binding operation to securely bind packaging bags, and an automatic packaging bag binding device that is directly used in the method.

<Prior art> As is well known, as citizens' lives become more affluent, the variety, quality, and quantity of products in the secondary market become more diverse and versatile, and various products are supplied and sold in large quantities and small quantities. Design and appearance are becoming important factors in both transactions and product packaging.

Among these, products such as candy and peanuts are often filled in polyethylene packaging bags in a predetermined number or weight, sealed by heat sealing, and then supplied to supermarkets and displayed. Their hygienic packaging and good design are stimulating consumers' desire to purchase them.

Generally, the shape of the seed packaging bag is formed into a cylindrical shape using a former made of polyethylene film or the like through a chute, and the product is automatically filled and heat-sealed. The cut ends of the upper and lower sealed parts are generally cut at right angles by cutting with a cutter or the like, which is often a so-called pillow type.

When displayed in a pillow-type packaging bag with the upper and lower ends sealed in a heat-sealed state, in order to stimulate the appetite and purchasing desire of infants, etc. A polyethylene packaging bag 1 filled with products is bound with a narrow colorful adhesive tape 5 or the like on a predetermined area 4 on the lower side of the heat-sealed part 3 of the upper opening 2 to improve the design and appearance. There is an aspect of the packaging bag designed to increase the product value.

By the way, the kind packaging bag 1 filled with products
In this case, the tape 5 is tied at the bottom 6 in that position.
If the binding is not done in parallel to the paper, the appearance will be poor.Furthermore, if the binding is not done in an accurate horizontal position and the shape of the opening 2 in the upper part 4 is not fan-shaped, This has the disadvantage of significantly deteriorating the appearance of the design and lowering the product value.

<Problems to be Solved by the Invention> Therefore, the bundling of packaging bags that has been used up to now has
-As shown in the invention described in Publication No. 30802,
In this embodiment, the bundling device 7 shown in FIG. 11 is used, and a plurality of bundling arms 10, 10 are provided radially through a bracket on the rotating shaft 9 of the rotary bundling device 8 provided at the center thereof. A holder 11 having a U-shape in plan view is provided at the tip of each of the holders, and the holder 11 is configured to rotate along a guide plate 12 provided concentrically with the rotating shaft 9 and semicircumferentially.
Further, a recess 1 for tying the packaging bag 1 is provided on the outer edge of the tip extending in the diametrical direction in the rotary tying machine 8.
A pair of binding arms 14, 14 having a set number of heads are provided with a set number of heads, and their tips can be mutually opened and closed at a set angle via a gear mechanism 15 at the base, and are opened and closed at a predetermined position on the guide plate 12. The guide plate 12 is connected to a cam mechanism 16 that changes the closed state and the closed state to the open/close state.
The tip is made to orbit along the .

The product is then filled from a packaging device (not shown) onto the starting end 17 of the guide plate 12 into the packaging bag 1 whose bottom 6 is heat-sealed first, and then the upper opening 2 is heat-sealed 3 and the product is filled into the packaging bag 1, which is heat-sealed with the bottom 6 first. The packaging bag 1 that has been cut through the opening 2 falls, and the holder 11 rotates and arrives at the part where it fell, and the packaging bag 1 is placed inside the holder 11.
While holding the guide plate 12, forcibly slide it forward and push it forward.
An opening 2 is formed in the tapered guide bars 18, 18 provided at the upper part of the set height along 2.
is gradually constricted as it rotates, and the pair of binding arms 14, 14 approach it so as to face each other by means of the cam mechanism 16 and the gear mechanism 15, and at the constriction position 19, the packaging bag 1 is squeezed from both sides in the vertical direction. Narrow down,
It slides around the guide plate 12 while maintaining this state, continues to maintain that state at the binding position 20, and is bound by a binding machine 21 with a narrow adhesive tape, and a pair of binding arms 14 are connected at the end of the guide plate 12. , 14 is the cam mechanism 16, and
The packaging bags 1 which are opened and bound by a gear mechanism 15 are dropped into a chute (not shown) and transported to the next stage of processing as appropriate.

Therefore, basically, the bottom 6 of the packaging bag 1 dropped from the packaging device slides against the plate 12 in the sliding circumferential path from the starting end 17 to the ending end 22 of the guide plate 12. Therefore, the packaging bag 1 tends to be tilted forward due to the sliding resistance of the bottom 6 and the moment due to the pushing action of the upper holder 11, and therefore, it naturally remains in the forward tilted position when the packaging bag 1 is moved to the binding position. When it is tied at 20,
As mentioned earlier, in the packaging bag 1, the binding of the tape 5 to the bottom 6 is not parallel, and since the binding with the tape 5 is performed in such a forward tilted position, the binding shape of the upper part 4 is symmetrical. This had the disadvantage that it was not formed into a fan-like shape, resulting in poor appearance and lowering the product's position from a design point of view.

Moreover, the packaging bag 1 is filled with products at the drop position 17, and the upper opening 2 is heat-sealed 3 and then cut, so that the bag 1 falls a predetermined height onto the guide plate 12. The tape 5 has a bad posture due to the impact of the fall, and is not set in the set posture.In that state, as described above, the tape 5 is pushed forward by the holder 11, so as it moves, the posture deteriorates from the initial state, and the tape 5 There is a disadvantage that a binding attitude parallel to the bottom 6 cannot be obtained, and also from this point of view, there is also an inconvenience that the fan-shaped shape of the upper part 4 cannot be guaranteed, and these together often reduce the product value. Therefore, in order to deal with this, it may be necessary to manually reshape the fan-shaped shape of the upper part 4 after binding, and in such a case, the number of pieces to be processed increases, resulting in high costs. It was easy to get into trouble and it was very inconvenient.

In addition, in the above-mentioned conventional technology, as shown in FIG. 11, since the binding machine 21 and the binding device 7 are fixed at predetermined positions and in a fixed posture, it is not possible to take a long binding time, and the binding of the tape 5 is difficult. The downside was that it couldn't be done exactly as planned.

In order to deal with this problem, although the tape 5 can be bound reliably by lowering the rotation speed, there are disadvantages in that high-speed processing is not possible, the takt of the packaging device is not matched, and mass production processing is difficult.

<Purpose of the Invention> The purpose of the invention of this application is to solve the technical problem of bundling at the bottom of the heat-sealed packaging bag after filling products based on the above-mentioned conventional technology, and to solve the problem by taking advantage of the advantages of rotary bundling. However, the binding is performed parallel to the bottom of the packaging bag, and the fan-shaped shape of the upper heat-sealed part is basically formed symmetrically, so that the design of the overall shape of the packaging bag is significantly improved. It is an object of the present invention to provide an excellent method for automatically tying packaging bags and an automatic tying device that can be used directly for the method, which can speed up and ensure tying, thereby benefiting the field of packaging technology used in the distribution industry.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the invention of this application, which is based on the above-mentioned claims and in accordance with the above-mentioned object, heats the bottom with the product filling device at the top. When the sealed packaging bag is filled with products, the clamping support device of the automatic binding device lightly clamps and supports the packaging bag from both sides using a soft elastic support body, and in this state, the upper part is heat-sealed. has been,
Alternatively, the opening that is not heat-sealed can be cut, and the cut packaging bag will not fall due to the clamping support state, and in the previous mode, each bundle provided through the predetermined interval of the rotary binding device in the moving process. While the arm rotates, the binding arm at the front in the circumferential direction is rotated backward by the circumferential swing device, forming a concave part for pinching support at the tips of both arms and the rear binding arm, and is lightly pinched and supported by the pinching support device. Support the packaging bag by squeezing the upper heat-sealed part from the circumferential direction of the packaging bag that has been sealed, or by squeezing that part in the vertical direction if it is not heat-sealed,
Then, the clamping support device for the side surface of the packaging bag is removed, the support for the packaging bag is changed, and the packaging bag, whose upper part is supported by a pair of binding arms, is moved in a circular motion towards the binding machine. By pushing the packaging bag into the binding machine in the release direction and moving on to the next binding,
The packaging bags are bound one after another in a predetermined manner, and in this process, the binding machine is pivoted concentrically to the shaft of the rotary binding device by a support arm, and moves at the same speed in the circumferential direction of the packaging bag at a predetermined stroke. The robot moves and securely ties the bag over a predetermined period of time with no relative speed difference with the packaging bag, and then the front bundling arm rapidly circles forward to reduce the rear looping speed, and the rear bundling arm rotates around the circumference. The bag is swung backward by a directional swinging device, approaches the binding arm further back, and squeezes and supports the upper heat-sealed portion of the next packaging bag or the portion that is not heat-sealed. On the other hand, technical measures have been taken to allow the bundled packaging bags to fall and be transferred to the next processing step as appropriate.

<Example> Next, an example of the invention of this application will be described below with reference to FIG. 10 and FIGS. 1 to 9. Note that the same parts as in FIG. 11 will be explained using the same reference numerals.

Reference numeral 23 denotes an automatic bundling device for packaging bags 1, which constitutes one of the gist of the invention of this application, and includes a packaging device 24 that is substantially similar to the conventional method, and a packaging device 24 at the bottom thereof.
A clamping support device 26 is linked to the packaging bag 1 via links 25, 25 and moves forward and backward from both sides of the packaging bag 1.
The rotary binding device 27 facing the front side is installed on a stand 28 erected on the base.
The rotating shaft 9 is rotatably supported in the vertical direction by a bearing 29 at the upper end of the rotating shaft 8 and a bearing 30 provided at the base, and is connected at its base to a predetermined drive device (not shown) via a bevel gear mechanism 31. It is designed to rotate in a predetermined manner.

Upper and lower disks 34, 34' are fixed to a collar 33 which is provided at a level position between the packaging device 24 and the clamping support device 26 with respect to the rotating shaft 9 via a keyway 32 and a key (not shown). established,
It is rotatable integrally with the rotating shaft 9, and bearings 35, 3 are provided at each peripheral edge thereof.
Pins 36, 36', etc. along the rotating shaft 9 through the pins 5' are arranged at equal intervals in the circumferential direction with a predetermined number of heads (3 in this embodiment).
Brackets 37, 37', etc., which are provided in twice the number of brackets 37, 37', each having a different thickness, are fixedly installed, and each of the brackets 37, 37' is fixedly provided with a binding arm 3 with a narrow vertical interval.
8, 38, upper and lower wide binding arms 38', 3
8' are the front and rear edges of the outer ends of the packaging bag 1, respectively;
Further, recesses 13' and 13' for clamping are formed and provided integrally.

Incidentally, the upper and lower narrower binding arms 38, 38 are formed so as to meet and intersect with each other at their tips when they approach each other relative to the upper and lower wide binding arms 38', 38'.

In addition, brackets 39, 39' are fixed to the upper end of each pin 36, 36' at alternate intervals, and upward cam follower rollers 40, 40' rotatably supported at the tips of the brackets 39, 39' are attached to the stand. An inner and outer arc-shaped cam groove 4 is provided on the lower side of a cam plate 43 provided on a bracket 42 fixed to 28 via a bracket 41.
4 and 44' in a rotatable manner.

Further, a bearing 45 is provided inside the cam plate 43 to allow relative rotation of the rotating shaft 9.

Then, the upper and lower narrow binding arms 38, 3
8, and upper and lower wide binding arms 38', 3
As shown in FIG. 2, each of the binding arms 38, 8' has leftward recesses 49, 49 and rightward recesses 49', 49' formed at the edge portions of the ends thereof.
38' in the heat seal 1 in the assembled position as shown on the left side in FIG. It is designed to be narrowed down and supported from the vertical direction.

In this narrowed position, the packaging bag 1 filled with the product 1'' is supported reliably by the pair of upper and lower binding arms 38, 38' even if the upper heat-sealed part is cut. It is designed to prevent it from falling even when turning.

Therefore, in this embodiment, the packaging bag 1 containing the product 1'' is not provided with a support plate for sliding in the circumferential direction on the bottom thereof, but is held between the binding arms 38 and 38', and is held in a kind of air space. They are being transported.

The pin 36 of the binding arm 38 and the cam follower rollers 40, 40' provided above the pin 36' of the binding arm 38' are connected to the cam plate 4.
The cam plates 43 and 43 are designed to roll into the cam grooves 44 and 44' of No. 3, and each cam plate 43 has a shape as shown in FIG.
When the cam follower rollers 40, 40' engage and roll into the cam grooves 44, 44' as the rotating shaft 9 rotates, the binding arms 38 and 38' meet and separate at their tips. The recesses 49 and 49' narrow and support the film sheet 1' filled with the product 1'' of the packaging bag 1 in the vertical direction, and open the film sheet 1' to convey it to the next conveyor (not shown). It is meant to fall.

As shown in FIG. 2, a support arm 52 extends radially through a bearing 51 at the upper part of the rotating shaft 9, and a binding device similar to the conventional one is attached to the tip of the support arm 52. 21' is fixedly installed so as to be freely swingable in the circumferential direction.

Further, as shown in FIGS. 1 and 2, a gear 53 is formed around the disk 34, while a bearing 5 is provided near one side of the cam plate 43 as shown in FIG.
3, a shaft 54 is suspended by a bearing, and a pinion 55 is provided at the lower end of the shaft 54.
is engaged with a gear 53 of a cam plate 43 to be freely rotatable, and a crank lever 57 is connected to pins 58 and 58 at a predetermined position between a disk 56 provided at the upper end of a shaft 54 and a support arm 52. Therefore, the rotation of the rotating shaft 9 causes the pinion 55 to rotate through the rotation of the gear 53.
rotates, and the support arm 52 swings in a horizontal position at a set angle with respect to the rotating shaft 9 via the crank lever 57. Therefore, the binding device 21' fixed at the tip of the support arm 52 is placed in the binding position. The upper part of the packaging bag 1 is compressed and supported by bringing the recesses 49 and 49' together by a predetermined stroke in the circumferential direction, and the wrapping arms 38 and 38' are rotated at a relatively slow speed in the circumferential direction at the tips of the wrapping arms 38 and 38'. The adhesive tape can be reliably bound to the upper part of the packaging bag 1', and the swinging motion of the adhesive tape at a predetermined stroke in the circumferential direction is repeated.

These mechanisms are designed by the cam follower rollers 40, 40' and the cam grooves 44, 44' to prevent the film sheet 1' of the packaging bag 1 shown in FIG.
The tip portions of the binding arms 38, 38' meet from the heat-sealed portion to the binding machine 21', forming a recess 49,
49' tightens the film sheet 1' and rotates around the film sheet 1' while maintaining its posture, and binding is performed, and from the end of the binding stroke, the binding arm 38 rapidly moves forward in the circumferential direction, and the binding arm 38' is decelerated. The binding arm 38 is set so as not to approach the bundled packaging bags 1' at a set low speed, and to drop the packaging bags 1' onto a conveyor (not shown), so that the binding arm 38 does not interfere with the waiting film sheets 1'. It tilts in the horizontal direction in the leading position and rapidly passes through the film sheet 1', and after passing, it is decelerated and its tips meet in the vicinity of the binding arm 38' which is coming around later, and each The concave portions 49, 49' are configured to perform a narrowing action and support the film sheet 1'.

These processes are illustrated in Figures 4, 5 and 6, in which the binding arm 3 for the film sheet 1'
The attitude in which the binding arms 8 and 38' meet is shown in FIG. 7, and the attitude in which the binding arms 38 and 38 pass inside the film sheet 1 without interfering with it is shown in FIG. The posture of approaching the film sheet from behind is shown in FIG.

In the filling device 24, the pair of inner and outer brackets 59, 59' are intermittently brought close to each other and separated from each other by a cam mechanism (not shown), and such a mechanism is generally not used in a conventional heat seal mechanism. The one that is adopted is the one that is given
A retainer 60 is installed on the outside of the outer bracket 59'.
The cutter 62 is equipped with a solenoid 61 and a cutter 62.
The foray into the opposite direction has been made at will.

On the other hand, the clamping support device 26 provided on the lower side of the packaging device 24 accommodates the product 1'' and supports the packaging bag 1, whose upper opening 2 is heat-sealed, from both sides with clamping pressure. A predetermined control device (not shown) causes the links 25, 25' of the clamping support device 26 to approach simultaneously in synchronization with the approach and separation of the inner and outer brackets 59, 59' of the heaters 63, 63' of the filling device 24. Or, the clamping support device 2
The links 25 and 25' of No. 6 are appropriately controlled so that they approach each other faster than the other one for a set time.

Support bodies 61 and 61' made of urethane foam are fixed to the retainers 60 and 60', which are integrally fixed and erected to the links 25 and 25, with an epoxy adhesive to hold the packaging bag 1 therein. The air inside the packaging bag 1 is expelled by applying light pressure from both the inside and outside sides.

In the above-mentioned bundling device 23, the polyethylene film sheet 1' is fed from a bag manufacturing device (not shown), and the lower part of the cylindrical forming part of the former (not shown) forms the packaging bag 1, as shown on the left side of FIG. The specified amount of product 1″ such as Kyanday is filled,
The rotating shaft 9 is supported by bearings 29, 30 via a bevel gear device 31 and rotates in a predetermined manner, so that each pin 3 supported by disks 34, 34'
Each binding arm 38, 38' also connects to the cam groove 44, 44 of each cam follower roller 40, 40' via 6, 36'.
44' through a rolling engagement, it is rotated while swinging in the circumferential direction.

For convenience of explanation, the operation at the throttle position 19 will be explained. As shown in FIG. The packaging bag 1 is suspended from the packaging device 24 by the film sheet 1'.
On the other hand, the links 25 and 25' of the clamping support device 26 approach from the inside and outside, and the support bodies 61 and 61' lightly clamp and support both the inside and outside sides of the packaging bag 1 through their retainers 60 and 60', thereby releasing the inside of the packaging bag 1. The air is expelled, and then the brackets 59, 59' of the packaging device 24 are brought closer by a cam mechanism (not shown) in synchronization with the approaching movement of the links 25, 25' of the clamping support device 26, or with a slight time delay. The heaters 63 and 63' heat the film sheet 1' to perform heat sealing 3 on the upper opening 2 and bottom 6 of the packaging bag 1,
Next, the solenoid 61 is energized and the cutter 6
2 approaches and cuts the film sheet 1'.

However, since both sides of the lower packaging bag 1 are lightly pinched and supported by the support bodies 61 and 61' of the pinching support device 26, it does not fall and maintains its initial pinching and supporting posture.

During this time, as the rotating shaft 9 rotates, the cam follower rollers 40, 40' of the binding arms 38, 38' are guided by the cam grooves 44, 44', and the tips of the binding arms 38, 38' The state shown in FIG. 6 changes to the state shown in FIG. 4, and the recesses 49 and 49' are close to each other from behind in the longitudinal direction of the film sheet 1', and overlap as shown in FIG.
Each of the recesses 49', 49' applies a squeezing action to the upper part 4 of the film sheet 1' from the longitudinal direction and supports the packaging bag 1 under pressure.

Then, the packaging bag 1 at the squeezing position 19 of the packaging bag 1
Binding arm 3 for heat sealing and cutting work
8 and 38' are shown in FIGS. 7 and 9.

At this timing, the links 25 and 25' of the clamping support device 26 are separated inwardly and outwardly via a control device (not shown), whereby the support bodies 61 and 61' are separated from both sides of the packaging bag 1 and exert a clamping support function. In this process, both binding arms 38, 3 are separated.
Since the concave portions 49, 49' of 8' squeeze and support the upper part 4 of the packaging bag 1, even if the supporting bodies 61, 61' of the clamping support device 26 are separated, the packaging bag 1 is not dropped, and the support bodies 61 and 61' support the packaging bag 1 in a pinching and supporting posture.

During this period, since the rotary shaft 9 rotates continuously, the binding arms 38, 38' are connected to each other in the circumferential direction by the rolling engagement of the cam follower rollers 40, 40' and the cam grooves 44, 44'. The vehicle continues to orbit while maintaining the attitude shown in Figure 5.

During this time, the packaging bag 1 is attached to both binding arms 38, 38'.
The recesses 13' and 13' at the tips of the packaging bag 1 overlap and support it as shown in FIG.
The attitude remains unchanged.

Furthermore, when the binding arms 38, 38' approach the binding device 21', as shown in FIGS.
1', the adhesive tape 5 binds the upper part 4 of the packaging bag 1.

Therefore, the concave portions 49, 49' at the tips of the binding arms 38, 38' meet, and the binding machine 2 is moved from the position where the film sheet 1' is squeezed and supported.
It continues to orbit while maintaining the meeting attitude until it approaches 1'.

On the other hand, a gear 5 formed around the disk 34 is used to rotate the rotating shaft 9 of the disk 34, 34'.
3 rotates the pinion 55 at a constant speed, and as the disk 56 on the upper stage of the shaft 54 rotates, the crank lever 57 uses the support arm 52 to reciprocate in the circumferential direction at a predetermined angle around the rotating shaft 9, as described above. When the binding arms 38, 38', which are in the engaged state in the closed position where the upper part 2 of the packaging bag 1 is squeezed and held, approach the binding position as shown in FIGS. 6 to 4, the support arm 52 swings. As a result of the movement, the binding device 21' moves relatively close to the meeting tip of the binding arms 38, 38' from the opposite direction.

Therefore, the proximity of the tying arms 38, 38' to the tying machine 21' is developed very relatively quickly, whereupon the tying arms 38, 38' and the tying machine 21'
1' approaches, the binding machine 2 is moved by the action of the gear 53, pinion 55, and crank lever 52.
1' advances in the same direction as the ends of the circulating binding arms 38, 38', and during this time the adhesive tape 5 is squeezed by the recesses 49, 49' of the binding arms 38, 38'. Tie the parts that are tied together.

At this time, in the binding stroke, the binding arm 3
8, 38' and the tying machine 21' move in the circumferential direction with a small relative speed difference, so that the tying time is sufficiently long, so that the tying is more reliably done by the adhesive tape 5, and the binding is completed at the end of the tying stroke. In this case, the cam follower roller 40 engages with the cam groove 44, causing the binding arm 38 to rapidly move away from the binding machine 21' and rotate around, as shown in FIG. Its forward inclination angle is at heat seal position 19
At this time, the film sheet 1' is rotated in a position that is located further inside than the waiting film sheet 1', and there is no interference between the two.

During this time, the binding arm 38 is decelerated as shown in FIG. 6 due to the formation of its cam follower lower 40' and cam groove 44' as shown in FIG.
Due to the engagement of the pinion 55 with the gear 53 and the action of the crank lever 57, the falling adhesive tape 5 is prevented from pushing down the bundled packaging bag 1 when the speed in the circumferential direction becomes zero. The packaging bags 1 that have been bound with the tape 5 fall in a natural falling position and are sequentially and orderly transferred to the next stage by a lower conveyor (not shown), where the binding arms 38' are in a position tilted backward in the circumferential direction. Then, by the action of the cam follower roller 40' and the cam groove 44', it is rapidly returned to the forward inclined position and approaches the heat sealing position 19.

On the other hand, after the preceding binding arm 38' passes through the film sheet 1' with its tip not interfering with the waiting film sheet 1', it rotates in the opposite direction against the rotation in the circumferential direction, and as shown in FIG. The other binding arm 38', which is rotating from the front, engages with the waiting film sheet 1' from the front side, and the binding arms 38, 38' perform the above-mentioned squeezing action and wrap the film. The upper part 2 of the bag 1 is supported by a pinching force.

In this way, the binding arms 38, 38' are sequentially squeezed against the upper opening 2 of the packaging bag 1, supported under pressure, supported in the circumferential direction, transported in the air, bound with adhesive tape, released and dropped, and changed the posture of the next stage. go.

During this time, the packaging bag 1 whose bottom 6 is filled with the product 1'' is lowered from the packaging device 24 to the link 25,
retainer 60 of the clamping support device 26 via 25';
60' approaches from the inside and outside, the supporting bodies 61, 61' lightly press both sides of the packaging bag 1 to expel the air inside, and stand by while being supported with slight pressure, and then the bracket of the upper packaging device 24 The heaters 63 and 63' heat-seal the upper opening 2 and the bottom 6 by moving the heaters 63 and 63' close to each other by a cam mechanism (not shown) in the same way as described above, and then the solenoid 61 is activated and the cutter 62 cuts the film. Sheet 1' is cut in the same manner as described above.

And, at that timing, as I mentioned earlier,
A throttling effect is provided by the binding arms 38, 38'.

The cycle positions of the binding arms 38, 38' relative to each other, approaching and separating, closing/opening, and tilting forward are as shown in FIGS. 4, 5, and 6.

In this way, filling, heat-sealing and cutting of the product 1'' into the packaging bag 1 are carried out at the same plane level, whereas the binding arms 38, 38' with a predetermined number of heads are arranged in a smaller number than in the conventional manner. Despite the fact that the two binding arms 38, 38' each move in the circumferential direction with respect to the rotating shaft 9 via the support pins 36, 36'... The binding arms 3 leading and trailing the binding arms 38, 38' are pivoted in the circumferential direction and in the opposite direction.
Recesses 49, 4 at the tip alternately with respect to 8, 38'
9' together to squeeze the upper part 4 of the packaging bag 1;
Further, the squeezing process, the pinching support transfer process, and the bundling process can be performed successively by performing a pinching support action.

During this time, the packaging bag 1 is not only subjected to a compressive support action prior to squeezing, but also the air inside is expelled, so that it does not slide on the guide plate as in the conventional method, but is placed in a kind of air conditioner. Since it is subjected to the rotational transportation action, the posture does not change at all, and the binding action can be applied while maintaining the initial clamping and supporting posture.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments. For example, the embodiments of the invention of this application are not limited to the above-mentioned embodiments. It is possible to adopt various modes such as doing it at the same timing, or changing the rotation direction by a solenoid via a limit switch etc. for the circumferential swinging device of the binding arm with respect to the rotary binding device, which is not limited to a cam or cam follower mechanism. It is.

Furthermore, in addition to adhesive tape, strings, wires, etc. can be used as the binding means, and various packaging bags such as those made of paper can be used in addition to those made of polyethylene. Of course, this is also true.

It is also applicable to a case where the upper part of the packaging bag is not heat-sealed before bundling.

<Effects of the Invention> As described above, according to the invention of this application, basically, when binding the upper part of a packaging bag for storing a predetermined amount of products such as candy or peanuts with colorful adhesive tape, etc. The packaging bag is made of a film made of polyethylene or the like and is very beautifully designed and has an excellent appearance, and the adhesive tape or the like can be used to bind the bag parallel to the bottom as designed. As a result, the upper part can be formed into a symmetrical fan shape as designed, creating a beautiful overall design.
An excellent effect is achieved in terms of design as well, in that added value is utilized.

Therefore, it has the effect of increasing the commercial value of products displayed in supermarkets and stores, and also has the advantage of being able to retain its quality as a property when held by young children. The effect is produced.

Therefore, in the method of bundling, by squeezing and supporting the upper part of the packaging bag after it has been filled with products, the packaging bag can be transported in a kind of aerial transport prior to binding. Even if the upper part is heat-sealed or cut while the packaging bag is always supported, the packaging bag will not fall because it is supported by the squeezing part, and instead of falling onto the guide plate and being transported by slide as in the conventional case. This provides an excellent effect in that the patient's posture does not collapse.

Furthermore, since the binding arm can provide support by applying a squeezing action, it is possible to carry out a type of aerial transportation, as described above, up to the binding process of the product, and the product can be supported by the squeezing action of the binding arm. Since it can be tied while maintaining its posture, it has the excellent effect of being able to tie it parallel to the bottom.

In addition, since air transportation does not change the posture of the packaging bag, it has the excellent effect of forming the upper part into a perfect fan shape.

In this way, the packaging bag is supported in the air from the supported state by the upper aperture to the tied state, so there is no change in posture.

At the binding site, the wrapping machine is rotated so as to reduce the relative speed in synchronization with the rotation speed of the binding arm that squeezes the packaging bag in the circumferential direction in a meeting position and rotates while holding the bag. Therefore, it is possible to wrap adhesive tape, etc. in a position parallel to the bottom of the packaging bag as designed, and to bind it securely, which prevents poor binding and damage to the binding part in the subsequent process. Excellent effects such as no cracking, increased reliability of the product, and no reduction in product yield are achieved.

As a result, in the binding device, the merits of the conventional compact type in which a large number of radial binding arms are provided with respect to the central rotary binding device can be fully utilized.

In addition, each binding arm is supported by a pin on the rotary binding device, and the direction of rotation can be adjusted as well.
Since the set angle can swing freely toward the rear, the binding arm leading in the circumferential direction rapidly moves forward in the circumferential direction at the end of the binding stroke, and therefore, by swinging, the film sheets of the waiting packaging bag are In order to be able to wrap around the film sheet first without interfering with the film sheet inside, and to narrow down the binding arm and film sheet that come later, the rotary binding device can be installed in a position and posture that close to the packaging device. As a result, the excellent effect that the entire device can be made compact is achieved.

In addition, since the binding arm is swingable in the process of turning in the circumferential direction, the binding machine itself can rotate synchronously with the binding arm at the same speed as described above during the binding process, which reduces the binding stroke. When the speed of the tying machine reaches zero at the end of the process, the leading tying arm quickly separates and moves forward as described above, and the speed of the trailing tying arm can be reduced, so that the tying is completed. The packaging bag falls in a stopped position in the circumferential direction and is naturally transferred to the next process without being interfered with by the binding arm. An excellent effect is achieved in that processing can be performed as designed.

In this way, the binding arm and the binding machine can mutually bind adhesive tapes, etc. to packaging bags, and can perform the squeezing and pinching posture for the film sheet of the next packaging bag in the most efficient time and process. The work efficiency is significantly improved, and the binding can be done in the designed position, which is an excellent effect.

In addition, since the packaging bag does not need to fall after the product is filled, there is no damage to the product, and the good design of the product can be maintained, making it easier for young children. This has the excellent effect of providing a sense of satisfaction for owning the item.

[Brief explanation of drawings]

1 to 11 are explanatory diagrams of one embodiment of the invention of this application, in which FIG. 1 is an overall schematic longitudinal sectional view, FIG. 2 is a partial sectional plan view of the main part of the mechanism, and FIG. 3 is a cam A bottom view of the plate; Figures 4, 5, and 6 are schematic plan views of the binding arm showing the squeezing process for film sheets and the binding process of the binding machine; Figures 7, 8, and 9 are side views of the process of connecting the packaging bag and the binding arm. 10 is a completed perspective view of the packaging bag, and FIG. 11 is a schematic plan view of a conventional binding device. 49...Product, 1...Packaging bag, 3...Seal part, 1'...Both sides, 27...Rotary binding machine,
38, 38'... Binding arm, 21'... Binding machine,
23...Automatic bundling device, 24...Wrapping device, 63
... Sealing device, 49 ... Recess, 56, 57, 5
2... Circumferential rocking device.

Claims (1)

[Scope of Claims] 1. An automatic method for tying packaging bags in which after sealing a packaging bag filled with a product, the upper part of the sealing part is cut off and the bag is wrapped around the bag to automatically tie the bag. An automatic method for tying packaging bags, characterized in that a tying machine is also moved synchronously to tie the bags while the bags have been wrapped around the bag. 2. The method for automatically tying packaging bags according to claim 1, wherein the tying is repeatedly performed at a predetermined stroke using one tying machine. 3 Automatic bundling in which a rotary bundling device facing a packaging device equipped with a cutting device radially supports a set number of bundling arms so as to be swingable in the circumferential direction, and the ends of the bundling arms can freely pass through the bundling machine. An automatic packaging bag tying device, characterized in that the tying machine is linked to a swinging mechanism via a support arm concentric with the rotary tying device so as to be swingable at a set angle. 4. The automatic packaging bag binding device according to claim 3, wherein the swinging device is a gear mechanism.