JPH0523441Y2 - - Google Patents

Description

[0003] (Field of Industrial Application) The present invention relates to a top crimping device for a rectangular paper container having a gable-shaped top closure.

(Problems with the Prior Art) Conventionally, rectangular paper containers with gable-shaped top closures have been used as disposable packaging containers for milk and other foods. The folding device for the triangular end panels to be folded, which is inserted into the opening of the container, and the folding pieces from the outside thereof are not actuated by the same source.

(Means for Solving the Problems) The present invention was devised in view of the above points, and consists of a receiver inserted into the opening of a paper container and a triangular wing for folding from both outside sides of the receiver. This means that when the guide rod, which is supported by the horseshoe-shaped arms on the front and rear sides of the support frame and is fixed to the support frame, descends due to the first contraction of the piston rod of the air cylinder, the receiver and the triangular wing are connected to the paper container. Corresponding to the opening, during the subsequent second stage contraction of the piston rod, the support frame remains in its position and is rotated relative to the triangular wing receiver by means of a linkage mechanism associated with the piston rod via the support plate to remove the paper container. The opening is folded inward, and the folding device between the receiver and the triangular wing can be operated by operating an air cylinder. This contraction of the piston rod is performed continuously from the first stage to the second stage without stopping.

(Example) The embodiments shown in the drawings will be described below.

First, a rectangular paper container with a gable-shaped top closing part will be explained. In FIG. is adhesive flap 9
are connected through the fold line.

Sloped roof panels 5, 6 are connected to the front and rear panels 1, 2 via the fold line, and outer rib panels 7, 8 are connected to the slope roof panels 5, 6 via the fold line. , the outer rib panels 7, 8 terminate therewith in a pair of sealing flaps 9a, 10.

Thus, the sloped roof panels 5, 6 have diagonal fold lines 11, 12 to form spouts.

Further, triangular end panels 13, 14 are connected to the left and right side panels 3, 4 via the fold line, and triangular folded panels 15, 16, 17, 18 are connected to each triangular end panel via the fold line. It is set up.

There are then inner rib panels 19, 20, 21, 22 running from the apexes of the triangular end panels 13, 14 through short vertical fold lines ending at the upper edges of the material, each of said triangular folded panels 15, 16,
17 and 18 are installed consecutively.

Therefore, when sealing the top closure, each panel is folded into a gable shape. During this folding process, the triangular end panels 13, 14 are folded by being pushed inward.

Next, the inner rib panels 19, 20, 21, 2
2 and outer rib panels 7, 8 and sealing flaps 9a, 10 on both sides by applying heat. Thus, as shown in FIG. 5, a container is formed with a central laminated rib formed on the top and a sealed gable top closure.

The present invention relates to a device for folding the triangular end panels 13, 14 of a container as described above.

That is, in FIG. 1, an air cylinder 24 is installed in a machine frame 23, and this piston rod 2
A support plate 26 is attached to the upper end of 5.

Two shaft bearing cylinders 2 erected on the support plate 26
Guide rods 28 and 28 are slidably inserted into the holes 7 and 27, respectively, and are also inserted through a stopper 23' mounted on the machine frame 23, and a stopper nut is engaged with the stopper 23'. 29,
29 is screwed onto the upper ends of the guide rods 28, 28. Reference numerals 30, 30 denote holding nuts screwed onto guide rods 28, 28 below the stopper 23', and the upper ends of the bearing cylinders 27, 27 mentioned above can be freely engaged with and detached from the holding nuts 30, 30.

A support frame 35 having front and rear horseshoe-shaped arms 35', 35' is fixed to the lower ends of the guide bars 28, 28, and springs 31, 28 are attached to the guide bars 28, 28 between the support frame 35 and the support plate 26.
31 is wrapped.

Also, the front and rear horseshoe arms 35', 35 bearings 37,
Rotating shafts 38, 38 are supported by 37, 36, 36, and the small arm 3 is fixed to these shafts 38, 38.
4, 34, and pins 48, 4 to the support plate 26.
The large arms 32, 32, which are pivoted at 8, are linked to each other by pins 33, 33.

Triangular wings 3 are attached to the tips of the rotation shafts 38, 38.
9 and 39 are fixed, and are rotatable by the link mechanism described above.

Further, between the pair of left and right wings 39, 39, a receiver 42 is supported by a pair of front and rear columns 41, 41 provided on a protruding arm 40 protruding from the front horseshoe-shaped arm 35' of the support frame 35.

Next, the operation of the custom folding device configured as above will be explained. With the bottom closed part sealed and the top opened, the paper container is conveyed from the direction of the arrow in FIG. 3 on a conveyor and stops directly below the receiver 42.

Then, the air cylinder 24 is activated and the piston rod 25 contracts to lower the support plate 26, and in the first stage until the stopper nuts 29, 29 of the guide rods 28, 28 are locked with the stopper 23', The guide rods 28, 28 are also lowered by the springs 31, 31 and the holding nuts 30, 30, and the support frame 35 fixed thereto,
Horseshoe-shaped arms 3 before and after support frame 35
Triangular wings 39, 3 supported by 5', 35'
9 and the front and rear columns 41 of the protruding arm 40 from the front horseshoe arm 35';
The receiver 42 supported by 41 is lowered together.

At this time, the triangular wings 39, 39 are opened and in an upright state, and are lowered with the receiver 42 interposed between the triangular wings 39, 39.

Therefore, the receiver 42 has a triangular wing 39,
39 into the paper container from the upper opening of the paper container.

Stopper nuts 29, 29 are stopper 2
3', the lowering of the guide rods 28, 28 is stopped, and in a second step, only the support plate 26 is lowered by the subsequent contraction of the piston rod 25 against the force of the springs 31, 31.

Therefore, the support frame 35 fixed to the guide rods 28, 28 and the front and rear horseshoe arms 35',
The triangular wings 39, 39 of the rotation shafts 38, 38 supported at
Although the lowering of the receiver 42 supported by the supports 1 and 41 stops, the support plate 26 continues to lower as described above, so that the arm 3 forming the link mechanism
2, 34, 32, and 34 rotate the pivot shafts 38, 38 inwardly, and the triangular wings 39, 39 cause the triangular end panels 13, 14 of the paper container to be folded.

Next, when the piston rod 25 is expanded, the compressed springs 31, 31 are expanded, and the triangular wings 39, 39 are restored to their original positions via the link mechanisms 32, 34, 32, 34. As the support plate 26 continues to rise, the bearing cylinder 27,
When the guide rods 27 hit the nuts 30, 30, the guide rods 28, 28 rise, the support frame 35 also rises, and the triangular wings 39,
39 remains open and rises together with the receiver 42 in the direction away from the paper container. A carton retainer 43 is provided to prevent the paper container from following the rise during this rise.

The extent to which the illustrated carton holder 43 protrudes is determined by its slit groove 4 relative to the pins 45, 45 of the arm 46.
It is arbitrarily set depending on the position where 4 and 44 engage. Further, since the arm 46 can be adjusted to slide vertically with respect to the column 47, it can be adapted to the size of the paper container.

Therefore, the receiver 42 has a groove 42a,
Since the carton retainer 43 is positioned to fit into the groove 42a, there is no problem in lowering the receiver 42.

(Effect of the invention) The present invention is a crooked folding device for a triangular end panel that is folded into a sloping roof panel of a paper container as shown in FIG.
On the other hand, a support frame supporting the folding device with triangular wings rotating inward from both outsides, and a guide rod to which it is fixed,
It is lowered through the support plate due to the first stage contraction of the piston rod, and is stopped at that position so that the folding device corresponds to the opening of the paper container, and then supported during the second stage contraction of the piston rod. By lowering only the plate, the triangular wing is rotated to the receiving side and folded in through the related link mechanism, so by the operation of one cylinder,
Curved folding by the folding device can be performed rationally and efficiently through the support plate, guide rod, support frame, link mechanism, etc.

Moreover, the rotation axis that fixes the triangular wing is
Since it is pivotally supported by the front and rear horseshoe-shaped arms fixed to the support frame, the support is stable and the rotation of the triangular wing will not be distorted.

[Brief explanation of drawings]

Fig. 1 is a side view of the device of the present invention, Fig. 2 is a front view of the same as above, Fig. 3 is a plan view of the same as above, Fig. 4 is a blank plan view of the paper container, and Fig. 5 is an assembled paper container. FIG. 1, 2, 3, 4...Front, rear, left and right side panels, 5,
6... Sloped roof panel, 13, 14... Triangular end panel, 24... Cylinder, 25... Piston rod, 26... Support plate, 28, 28... Guide rod, 31... Spring, 32, 32... Large arm, 34, 34...Small arm, 35...Support frame, 35', 35'...Horseshoe arm, 3
8, 38...Rotation axis, 39, 39...Triangular wing, 42...Receiver.

Claims (1)

[Scope of utility model registration request] In a device for folding a triangular end panel of a rectangular paper container, one of the triangular end panels formed in a gable-shaped top closure and folded into the sloped roof panel forms an expandable spout, a receiver fixedly supported on a front horseshoe-shaped arm fixed to a support frame; and a rear horseshoe-shaped arm fixed to the support frame and the front horseshoe-shaped arm rotatably supported from both sides of the receiver; The folding device consists of a triangular wing fixed to a rotating shaft supported by a support frame, and is supported by two guide rods that are raised and lowered by an air cylinder. 1st piston rod
During the first stage contraction, the piston descends via the support plate fitted to the guide rod and the spring at its lower end, and after the guide rod stops descending, the second stage contraction of the piston compresses the spring. As the support plate descends,
A top crimp folding device for a paper container, comprising a link mechanism connected to a support plate to rotate the triangular wing relative to the receiver via the rotation shaft.