JPS601201B2 - Folding device for paper containers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for forming folds on a paper container having a tongue piece on the upper edge of the entrance and a gable fold line on the upper surface, and the purpose of which is to form folds on a paper container. The purpose is to provide a device that can always perform the operations reliably.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a paper container 1, which is a container used for ice cream, dairy products, etc. This paper container 1' has an upper end entrance part IA, a body part IB, and a twill part IC, all of which are circular (
The bottom IC consists of a polyethylene laminate that has already been molded and sealed. The upper edge of the entrance is divided into four parts at 90 degrees, and a pair of opposing 90 degree portions have upwardly extending tongues ID and IE. Furthermore, near the upper green, there is a folding line IF in the direction of the station, and the blue pieces ID, I
The body part IB which does not have the tongue piece 10 and IE at the rising edge of E has the folding lines 11 and IJ of the gable parts IG and IH. In FIGS. 2 to 6, 2 is a conveyor device (basket conveyor device) that intermittently transports the paper containers 1;
A pair of upper and lower support frames 4 and 5 attached to the rock frame 3, a pair of left and right upper rails 6 attached to the upper surface of the upper support frame 4,
A pair of left and right lower rails 7 attached to the upper surface of the lower support frame 5, a pair of left and right chains 8A, 88 supported and conveyed by these rails 6, 7, and a plurality of movable chains attached between both chains 8A, 8B. A frame 9, a plurality of baskets 10 (eight in the figure) attached at regular intervals in the length direction of the movable frame 9 and allowing the insertion of the body part IB, and an upper support frame 4.
It consists of a plurality of rail-shaped bottom holders 11 attached to the upper surface of the holder, and is intermittently driven at constant pitches P in the direction of arrow A by a drive device (not shown). In principle, the movable frame 9 is
Although they are provided at equal pitches to the constant pitch P, they may be provided, for example, every 1/2 pitch or every 2 pitches. An elevating plate 12 is provided above the container conveyance path so as to cover at least two intermittent stop positions.
This elevating plate 12 consists of a pair of rods 13A hanging from the left and right.
, 13B are guided by guides 14A, 14B attached to the machine frame 3, and the lower portions of the rods 13A, 138 are integrated by a connecting punch 15. Between the connecting punch 15 and the machine frame 3, there is a buffer spring 16A for balance, which reduces the load on the lifting plate 12 side and smoothes the operation of the cam device, which will be described later.
16B is provided. Reference numeral 17 denotes an elevating drive device for the elevating plate 12, and a horizontal shaft 18 in the left and right direction is rotatably attached to the machine frame 3.
and a pair of left and right levers 19A fixed to this machine shaft 18,
19B, and connection links 20A and 208 provided between the tips of these levers 19A and 19A and the connection cassette 15,
A cam device 2 for vertically swinging the levers 19A and 19B.
1 and a cam drive device 22.

The cam device 21 is parallel to the machine shaft 18 and is connected to the machine frame 3.
a camshaft 23 rotatably attached to the camshaft 23;
A cam plate 24 fixed to the cam plate 24, a cam shaft 25 formed on one side of the cam plate 24, a cam lever 26 fixed to the machine shaft 18, and a cam lever 26 fixed to the shaft 18. The cam drive device 22 consists of an output steel 28 from a motor with a reduction gear (not shown), a rotor 28, and the cam shaft 2.
3 and bevel gears 29 and 30 that interlock with each other. The elevating drive device 17 configured as described above is timed to lower the elevating plate 12 when the conveyor device 2 is intermittently stopped, and to raise the elevating plate 12 before the intermittent drive. The elevating plate 12 has a paper container positioning device 31 that aligns the orientation of the gable portions IG and I in the upper portion corresponding to the intermittent stop position, and a gable portion IG and I in the lower portion corresponding to the intermittent stop position that is shifted by one pitch. A folding device 32 is provided for folding the ends as well as the non-gable portions. The paper container positioning device 3
Reference numeral 1 denotes a rack 34 supported by a pair of left and right guides 33 on the elevating plate 12 and movable in the left and right direction, and a cylinder (air cylinder) 3 for moving the rack 34 left and right.
5, and the vertical plate 12 of the bottom receiver 11.
A plurality of pinion shafts 36 are held through the pinion shafts 36, a pinion 37 is fixed to the upper ends of these pinion shafts 36 and fits into the rack 34, a portal fitting 38 is attached to the lower end of the pinion shafts 36, and It consists of a positioning shaft 40 that can move up and down while being guided by a vertical groove 39 formed in the leg of the portal fitting 38.
8 is rotated 180 degrees in forward and reverse directions, and when the rotation is stopped, the positioning shaft 40 is rotated 4 with respect to the transport direction shown by arrow A.
It is set to tilt at 5 degrees. The bending device 32 includes brackets 41A provided on both sides of the elevating plate 12,
41B, a pair of front and rear rotating shafts 42A, 42B attached between the lower ends of these brackets 41A, 41B, and a gable part folding piece 43 attached to these rotating shafts 42A, 42B.
A, 43B, a pair of left and right axes 44A, 44B provided on each side of one basket 101 and rotatably supported by the elevating plate 12, and these axes 44A in the anteroposterior direction.
, 448, and the gears 45A, 45 that mesh with each other.
8, a pair of left and right non-gable folding pieces 46A, 468 fixed to the longitudinal axis 44A, 44B, an idling roller 47 attached to the upper protrusion of one of the non-gable folding pieces 468, A movable shaft 49 having a vertical recess 48 into which the rolling roller 47 is inserted, a guide 50 for guiding the horizontal movement of this movable village 49, a cylinder 51 for performing the horizontal movement, and longitudinal shafts 44A, 44B at both ends. and rotating shaft 42
link mechanisms 52A and 52B that move A and 42B;
A posture regulating device 53 attached to the lower surface of the elevating plate 12 so as to face the basket 10 from above, and a lifting prevention fitting 5 installed from the machine frame 3 side so as to be positioned above the upper edge of the grade container 1.
4, the movable village 49 makes one reciprocating left and right movement when the elevating plate 12 is lowered, and the link foundations 52A,
528 is timed so that the gable folding pieces 43A, 43B perform the folding operation at the same time as the non-gable folding pieces 46A, 468 perform the folding operation. The action will be explained below.

Empty paper containers 1 are conveyed to the conveyor device 2 in a random state where the basket 1 is rolled and received in the bottom receiver 11.
It is transported intermittently by During intermittent conveyance, the elevating plate 12
is raised, and the positioning device 31 as well as the folding device 32 are in the inactive position. When the conveyor device 2 stops intermittent, the elevating plate 12 is lowered by a predetermined amount. After this, both devices 31, 32 operate simultaneously. That is, in the positioning device 31, the paper containers 1 whose orientation is random
7, the positioning shaft 40 is lowered as the lifting plate 12 is lowered.
It hits between D and IE or on the tongues ID and IE as shown in FIG. The vertical height change during twilling is absorbed by the considerable movement of the positioning shaft 40 within the groove 39 with respect to the portal fitting 38, and the paper container 1 is prevented from being deformed unexpectedly. Ru. Immediately after the elevator plate 12 is lowered under such circumstances, the cylinder 35 is activated and the rack 34
to rotate each pinion 37 by 180 degrees. This rotational force rotates the positioning shaft 40 via the pinion shaft 38 and the portal fitting 38. When the positioning shaft 40 is rotated 180 degrees from the state shown in FIG.
slides on the upper edge of the part that is not the tongue ID, IE, and touches (latches) on the rising part a of the tongue ID, IE, causing the paper container 1 to rotate integrally, and when the rotation is completed, the image shown in Fig. 8 is obtained. As shown, the paper container 1 is positioned so that the gables IG and I face the conveyor conveyance direction. Further, when the positioning shaft 40 is rotated 180 degrees from the state shown in FIG. 9, the positioning shaft 40 slides on the tongues ID and IE, and then
D. After falling into a part that is not IE, it slides on the upper edge of that part. After that, a flea pad (
When the rotation is completed, the paper container 1 is positioned so that the gables IG and I face the direction of conveyance by the conveyor, as shown in FIG. On the other hand, when the elevating plate 12 is lowered, on the folding device 32 side, the gable portion folding pieces 43A and 43B are opposed to the gable portions IG and I of the paper container 1 that have been positioned in the previous process as described above,
The non-gable portion folding pieces 46A, 468 face the non-gable portion. Further, the posture regulating tool 53 protrudes into the paper container 1, and the shift prevention metal fitting 54 is located above the upper edge of the paper container 1. Immediately after the elevating plate 12 is lowered to achieve this situation, the cylinder 51 is activated to move the movable punch 49 back and forth once. Due to the forward movement of this movable village 49, the roller 4
7, one non-gable folding piece 46B folds and swings, and the other non-gable folding piece 46A folds and swings via gears 44B, 44A, so that the tongue pieces ID, I
Fold in the nuka IF and fold it inward. At the same time, both rotating shafts 42A,
42B rotates, and the gable portions IG and IH are bent inward along folding lines IJ and 11 by the gable portion folding pieces 43A and 438. Although an external force acts on the paper container 1 due to such bending, the deformation is prevented by the presence of the posture regulating odor 53. Due to the return movement of mobile village 49, each new arrival 43A, 4
3B, 46A, and 468 are related. After such bending and the above-mentioned positioning are completed, the elevating plate 12 is raised, but at this time, the bent portion of the grade container 1 is caught by the posture regulating tool 53. However, the paper container 1 has a lifting prevention fitting 5.
4 prevents its upward movement, the posture regulating device 5
3 is extracted with the bent portion folded back. As a result, a paper container 1 with a crease can be obtained. Note that the return movement of the cylinder 35 of the positioning device 31 is performed in the next step. That is, the 180 degree rotation of the positioning shaft 40 is a forward rotation in the previous process and a reverse rotation in the next process. In addition, although the empty paper container 1 was described in the embodiment, this may be a paper container 1 filled with contents.

According to the present invention described above, when the conveyor device stops, the elevating plate lowers and the positioning shaft comes into contact with the upper edge of the opening of the paper container, and then the positioning shaft is rotated by a predetermined angle by the operation of the cylinder, and the positioning The shaft rotates the paper container by hitting the side surface of the tongue, thereby making it possible to orient the gable end of the paper container in a predetermined direction.

Therefore, the paper container can be folded in a predetermined direction using a folding device to create creases, and this operation can be performed completely automatically, making it suitable for mass production and being sanitary. This makes it possible to reliably heat and press seal the tongue portion after filling with the contents in a later step.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway perspective view of a paper container, FIG. 2 is a partially cutaway front view of the device, FIG. 3 is a partially cutaway side view, and FIG. 4 is a partially cutaway side view of the device. FIG. 5 is a partially cutaway plan view of the lifting drive unit, FIG. 6 is a partially cutaway side view of the diamond part, and FIGS. 7 to 9 are schematic plan views showing the positioning state. be. 1... Paper container, IA...Top opening □, IB...Body, IC...
Bottom, ID, IE...tongue, IF...fold line, IG,
IH...Gable section, 11, IJ...Folding line, 2...Conveyor device, 8A, 8B...Chain, 9...Movable "10"
...basket, i2...lifting plate, I7...lifting drive device, 21...cam device, 22...cam drive device, 31...
・Paper container positioning device, 32...Folding device "34...
Rack, 37... Pinion, 38... Portal fitting, 401
...Positioning shaft, 43A, 438...Gable part folding piece, 46A, Turtle 6B...Non-gable part folding piece 49...Movable piece, 53...Posture regulation odor, 54...Upper prevention fitting. No. Figure 1 Figure 2 Figure 5 Figure 3 Figure 4 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. An apparatus for forming folds on a paper container having a tongue piece on the upper edge of the opening and a gable fold line on the upper surface, comprising a conveyor device for intermittently transporting the paper container,
A paper container positioning device is provided at the upper intermittent stop position of this conveyor device to align the orientation of the gable portion, and a folding device for folding the gable portion and the non-gable portion is provided at the lower intermittent stop position, and the paper container positioning device is provided at the lower intermittent stop position. The device is movably supported by an elevating plate that is lowered when the conveyor device is intermittently stopped and raised before the intermittent drive, and a rack that is rotatably supported by a through hole in the elevating plate above each paper container at the intermittent stop position. A pinion shaft that is freely inserted, a pinion that is fixed to the upper end of each pinion shaft and that easily engages with the above, a portal fitting attached to the lower end of each pinion shaft, and a leg of each portal fitting. The pinion-pinion shaft and gate-shaped positioning shaft is guided by the formed vertical groove and is brought into contact with the upper edge of the opening of the paper container when the lifting plate is lowered, and the rack is moved back and forth. A fold-forming device for a paper container, comprising a cylinder that rotates a positioning shaft by a predetermined angle through a metal fitting, and rotates and positions the paper container through a tongue piece of the cylinder.