JPS6127246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carton manufacturing machine that can efficiently fold the ears of a flat-top carton to both sides and automatically heat-seal them.

Recently, cartons have been widely used as containers for milk and juices, and these cartons come in two types, gable-top and flat-top, depending on how the filling opening is sealed. The former has a filling opening shaped like a gable roof and is often used as a container for relatively large quantities, while the latter is often used as a container for small quantities.

The processing form of the flat top type ears includes the first
As shown in Figure A, there is one in which the ears are bent from the state shown in C to both sides and pasted, and another in which the ears are bent and pasted on the top surface as shown in Figure 1B.

The present invention relates to a flat-top carton manufacturing machine belonging to the former type. Conventionally, the means for bending and pasting the ears on the sides of the carton in this way include contacting the ears in the direction of movement of the carton; A known device is provided with a guide that gradually bends the ear portion downward and a holding guide that holds the finally bent portion for a certain period of time.

However, the configuration in which the ears are bent using the guides described above has the drawback that the carton moves between the guides, causing a large amount of friction, which may prevent the carton from moving smoothly or cause scratches on the surface of the carton. In addition, if the carton is moved too quickly, the carton may tilt due to friction, so there is a limit to this speed, and there is also a drawback that the processing speed is slow.

It is an object of the present invention to propose a flat-top type carton making machine that does not cause scratches on the carton when processing the edges of the carton, and has a high processing speed.

The present invention is characterized in that, as a means for achieving the above object, the guide method is omitted and a method is adopted in which the ears are bent by a clamp.This embodiment will be described in detail below with reference to the drawings.

In Figures 2 and 3, 1 is the entire automatic carton filling machine that forms the carton paper fed from the magazine 2, seals the bottom, seals the straw holes, fills the contents, and seals the mouth through a series of automatic operations. More specifically, there is a magazine 2 in which carton sheets are folded in two rows and stored in alignment, and mandrels 4, 4 are attached vertically to the lower surface of a disk 3, in which carton sheets a are taken out from the magazine 2 and rotate intermittently. ′, a carton paper a loading device 5 opens the carton paper a into a square shape and then loads it, and a bottom folding device 6 folds the bottom of the carton paper a mounted on the mandrels 4 and 4′. , a straw hole sealing device 7 that seals the straw hole, a bottom heating device 8 that heats the folded bottom, and a bottom sealing device 9 that presses the bottom of the carton paper a after bottom heating and seals the bottom. and,
Pull out carton b from mandrels 4 and 4' 2
A transfer device 22 that transfers the cartons b into the bucket carts 10 that move intermittently and can be pushed out in a row and accommodated two at a time; Contents filling device 1 for quantitatively filling contents from
1 and the mouth of carton b after filling with the contents,
A flat-top folding device 12 for forming a flat-top fold, a heating device 13 for the opening of the carton b with the folded folds, and an end of the opening seal to make the opening of the carton b that has been heated to a horizontal line. It consists of an applanation device 15 that crushes the mouth seal part of the carton c that has been prepared, forms the mouth seal part of the carton c into a boat shape as shown in FIG. .

Incidentally, as shown in FIG. 5, the bucket cart 10 is open in the front and back direction and the top with respect to the bucket conveyor chain 16 that runs intermittently, and the cartons b are transported in two directions.
A flat portion 10' is provided between the buckets 10 so that the ears d and d' protrude horizontally and flatly in both directions when applanating by the applanation device 15. is formed.

Reference numeral 17 denotes a carton edge processing device, which takes out the carton c, which has been filled with contents through the above steps and whose mouth seal has been crushed into a flat top shape, from the bucket 10, and removes the edges d and d' of the carton c. This is a device that bends the sides and heat seals.

This carton edge processing device 17 has an external configuration shown in FIGS. A clamp conveyor 18 runs horizontally in synchronization with the intermittent running of the conveyor 16, and the bucket 1
The clamp set 19 is attached at the same pitch as the interval of 0, and during the traveling process of the clamp set 19, the ears d and d' of the carton c and the carton to which the ears d and d' are heat-sealed. c.
a hot air blower 20 that heats the side surface of the carton paper a and melts the plastic film (polyethylene film in the example) laminated on the surface of the carton paper a; a pushing device 21 that pushes up the carton c after the hot air has been sprayed; The ears d and d' of the carton c pushed up by the push-up device 21 are bent downward and held between the left and right sides, and while this state is maintained, the clamp set 19 runs to fuse the ears d and d'. The main components are a clamp cam 24 and a clamp closing cam 25, which open when the carton c is completed and discharge the carton c.

Next, each of the above devices will be explained based on the attached drawings. First, the clamp set 19
As shown in FIG. 7, a base plate 26 is attached to the clamp conveyor 18, and pack pushing plates 27 and 27' are attached perpendicularly to the rear end (on the opposite side of the traveling direction) of this base plate 26. A passive member 28 with guide wheels 29 is provided at four locations on the upper surface of the base plate 26, and is pivotally supported by the passive member 28, protrudes from the lower surface of the base plate 26, and extends downward from the ears d and d' of the carton c. It is configured to be clampable so that it can be bent and clamped from both sides, and consists of eight clamps 30 that are normally biased toward the open side by springs.

Next, the hot air blower 20 is a hot air generator 3 with a cartridge heater installed inside, as shown in FIG.
1, and a head 32 with hot air blowing nozzles 33 attached to the upper end of the head 32, and while the carton c is stopped, the ears d,
Hot air is blown onto the bottom surface of d' and the side surface of carton c to melt the plastic film on the surface. Next, the pushing up device 21, as shown in FIG. 7, consists of a push-up table 34 that pushes up the carton c in the vertical direction, and in the process of pushing up the ears d, d' of the carton c placed on the push-up table 34, clamps 30... The ears a and a' are bent 90 degrees downward by placing them on the rounded parts made at the tips of the ....

Next, during the traveling process of the clamp set 19, the clamp cam 24 is located above the push-up table 34 and is attached to a clamp cam support 36 that moves up and down. The clamp 30 is operated by contacting the guide wheel 29 from above.

Next, as shown in FIG. 6, the clamp closing cam 25 extends in the running direction of the clamp set 19 following the clamp cam 24, and this clamp closing cam 25 pushes up the guide ring 9 of the clamp set 19. , a clamp surface 37 that activates the clamp 30 and maintains a state of clamping the ears d, d' of the carton c, and an opening cam surface 38 that releases the clamp 30.

In FIG. 6, 39 is the main shaft, 40 is the index drive gear box, 41 is the index outlet shaft driving gear, and 42 is the index drive gear box.
43 is a drive sprocket gear, 44 is an operating cam of the push-up table 34, 45 is a second cam shaft, 46 is an operating cam of the clamp cam support 36, and 47 is a connecting rod.

Next, the operation of the device of the present invention will be explained. Two cartons c are stored in each bucket 10.
is taken out onto the table by the pack pushing plate 27 of the clamp set 19 while the bucket 10 is stopped, as shown in FIG. The taken-out carton c moves along with it on the table by the clamp set 19 and stops at the next hot air blower 20 position. Note that during this time, the bucket cart 10 is traveling and has reached a position where the next carton c can be taken out by the clamp set 9.

While the carton c is stopped, hot air is blown out from the nozzle 33 of the hot air blower 20 as shown in FIG. to melt.
When this melting is completed, the clamp set 19 is set again.
moves the carton c horizontally, transfers the carton c from the table onto the push-up table 34, and stops. While the carton c is placed on the push-up table 34 and the clamp set 19 is stopped, the push-up table 34 is raised as shown in FIG. The ears d and d' of the clamps 30 contact the curved portions at the tips of the clamps 30, and are bent downward by approximately 90 degrees. When the push-up table 34 stops rising, the clamp cam support 36 descends as shown in FIG. 30, and pinch the ears d and d' of the carton c from the outside. When the clamps 30 have finished clamping the carton c, the push-up table 34 is lowered, and the carton c is suspended by the clamps 30 of the clamp set 19, and the clamp set 19 moves in this state.

By moving the clamp set 19, the guide wheel 2
9 transfers from the clamp cam 24 to the clamp closing cam 25 and holds the clamp 30 in a state in which the carton c is suspended as shown in FIG. Then, when the guide wheel 2 is completely sealed,
9 reaches the opening cam surface 38 as shown in FIG. 13, and the guide wheel 29 returns upwards by the force of the spring, opening the clamp 30. As a result, the carton c is released from the clamp 30, falls onto the table, and is pushed out again by the pack pushing plate 2.
Complete the entire process.

In addition, in the embodiment, a clamp 30 is used to bend the ears d and d' of the carton c downward.
A circular portion is formed in ..., and in the process of pushing up, the ears d and d' of the carton c come into contact with this circular portion and are bent downward. It is also possible to arrange a baffle plate such that the baffle plate bends the ears d and d' of the carton c downward.

As described above, the present invention does not seal the carton by bending the ears of the carton c downward with a guide and holding it, but by suspending and holding the carton together with the ears with clamps, so that the carton is not processed properly. There are no parts that get rubbed during the process.

As a result, the product value will not be reduced due to scratches on the carton.

Next, during the selvage processing process, the carton is not moved between guides, but is suspended by clamps, and the selvage is bent by vertical movement, so the movement friction that acts on the carton is caused by the movement of the carton. Very small except for the bottom touching the table.

As a result, it is possible to increase the processing speed of the ears and increase productivity.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a carton top, Fig. 2 is a plan view of the entire automatic carton filling machine implementing the present invention, Fig. 3 is a front view, Fig. 4 is a right side view, and Fig. 5 is a bucket conveyor. , FIG. 6 is a schematic perspective view showing the main parts of the present invention, FIG. 7 is a perspective view showing the drive unit, clamp cam, clamp set, and push-up table, and FIGS. 8 to 13 are operation explanatory views. . 1...Carton automatic filling machine, 2...Magazine,
3... Disc, 4,4'... Mandrel, 5... Mounting device, 6... Bottom folding device, 7... Straw hole sealing device, 8... Bottom heating device, 9... Bottom sealing device, 10... Bucket, 11... Filling device, 12... Flat top folding device, 13
...Mouth heating device, 14...Mouth sealing device, 15...
... applanation device, 16 ... bucket conveyor chain, 17 ... carton processing device, 18 ... clamp conveyor, 19 ... clamp set, 20 ...
...Hot air blower, 21...Pushing device, 22...
Transfer device, 24... Clamp cam, 25...
Clamp closing cam, 26...Base plate, 27,2
7'...Pack pushing plate, 28...Passive member, 29
... Guide wheel, 30 ... Clamp, 31 ... Hot air generator, 32 ... Head, 33 ... Nozzle, 34
... Push-up table, 35 ... Bending guide, 36 ... Clamp cam support, 37 ... Clamp surface, 38 ...
Open clamp surface, 39...Main shaft, 40
... Index gear box, 41 ... Index exit shaft driving gear, 42 ... Clamp set drive shaft, 43 ... Drive sprocket gear,
44... Operating cam, 45... Second cam shaft, 46...
...Operating cam, 47...Running rod.

Claims (1)

[Scope of Claims] 1. A bucket conveyor in which bucket carts with front and rear and upper sides open are continuously attached to a chain and run intermittently in the horizontal direction, and above the terminal end of the bucket conveyor,
A clamp conveyor arranged at right angles and intermittently traveling horizontally in synchronization with the bucket conveyor; and a horizontal base plate continuously attached to the clamp conveyor, the clamp conveyor running in a direction opposite to the traveling direction of the clamp conveyor. A pack pushing plate is attached to the side edge facing downward, and a clamp is attached that faces the bottom of the base plate and can be freely opened and closed at intervals, and this clamp comes into contact with a cam mechanism attached to the top of the base plate. A clamp set that moves to open and close and is opened by a spring when no load is applied, and a nozzle that is arranged on both sides of the starting end of the clamp conveyor in the running direction and blows hot air to the lower and upper surfaces of the ears of the carton. a hot air blower with holes opening upward and sideways; and in the running direction of the clamp conveyor,
a push-up table located next to the hot-air blower, which moves up and down to push up the carton from the table in a vertical direction; and when the push-up table finishes lifting and stops, it comes into contact with the cam mechanism of the clamp set from above; In order to operate the cam mechanism to narrow the gap between the clamps and pinch the ears of the carton from both sides, it is positioned on the cam mechanism of the clamp set, and in order to operate this cam mechanism, it is moved up and down to engage the cam mechanism from above. A clamp cam mechanism is arranged such that it can be pressed freely, and when the clamp cam mechanism is activated and located at the lowest point, the beginning of the cam surface is located on the same horizontal plane as the cam mechanism, and the cam mechanism is held down halfway from above. A flat-top carton making machine comprising: a rail-shaped clamp closing cam arranged so that the cam surface escapes upward and away from the cam mechanism of the clamp set;