JPH0123362B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a packaging box folding device that folds the corners of a packaging box containing articles to prevent the articles inside from falling out.

(Prior Art) Conventionally, for example, annular articles such as annular fluorescent lamps are stored in a flat prismatic cylindrical packaging box with an opening on the side, and then the multiple packaging boxes are combined into a larger one. It is shipped in an outer box. In this case, it is essential to close the opening with adhesive tape or fold the four corners of the packaging box inward to prevent the articles from falling out of the packaging box.

(Problems to be Solved by the Invention) The work of closing the opening with adhesive tape and the work of folding the four corners of the packaging box must be performed manually by temporarily stopping the flow of the packaging box in which the article is inserted. There is an inconvenience that packaging work takes time.

An object of the present invention is to automatically fold the four corners of a packaging box containing an article inward without stopping the flow of the packaging box, thereby shortening the packaging time.

(Means for Solving the Problem) In the present invention, in order to achieve the above object, along the transport path of a packaging box provided with an opening for inserting an article,
A moving member is provided which moves at substantially the same speed as the transporting speed of the packaging box in the transporting direction, and a folding device having a claw piece that swings to fold the packaging box is attached to the moving member. A cam is connected to the movable member so that the movable member reciprocates together with the folding device, and a corner of the packaging box is placed on the side of the movable member so that the corner of the packaging box is aligned with the opening when the movable member is operated. A cam piece is provided for swinging the claw piece of the folding device in order to fold it inward.

(Function) When a packaging box containing articles passes through the transfer path, the moving member is moved forward by the cam at the same speed as the packaging box. When the movable member is moved, the claws of the folding device attached to the movable member are oscillated by a fixed cam provided on the side of the movable member, and the corner of the packaging box is moved inside the opening. Fold it towards the side.
This folding operation is performed while the claw pieces move at the same speed as the packaging box, and can be performed automatically without stopping the flow of the packaging box, so that the packaging time can be shortened and no human effort is required.

(Example) To explain the example of the present invention with reference to the drawings, the first example is as follows.
In the figure, 1 is a packaging box, 2 is an annular fluorescent lamp and other articles, 3 is a transfer path made of a longitudinal plate-like body with a smooth surface, and 4 is a supply path for the packaging box 1.
The sheet-like cardboard drawn out from the magazine is folded back and glued while being moved through the supply path 4 by rollers or the like to form a rectangular cylindrical packaging box with an opening 5 as shown in Fig. 2. , is dropped onto one side of the rear end of the transfer path 3 with its opening 5 facing sideways. 6 is an article supply path for annular fluorescent lamps and other articles, 7 is a rotatable screw roller provided on the side of the article supply path 6, and the articles 2 are placed at regular intervals along the groove 7a of the roller 7. Transfer path 3 while holding
It is sent onto the belt conveyor 8 at the rear end, facing the opening 5 of the packaging box 1. As shown in FIG. 3, the packaging boxes 1 and the articles 2 juxtaposed on the transfer path 3 are arranged horizontally with a gap between the endless chains 9, 9 provided on both sides of the transfer path 3. 10 to the front end of the transfer path 3, but during the pushing, the insertion arm 11 emerges and retracts from the side of the transfer path 3.
inserts the article 2 into the packaging box 1. The insertion arm 11
are slidably inserted into and supported by a plurality of holders 12 provided on the chain 9 on one side corresponding to the middle part of each horizontal rod 10, and the pin 13 at the rear end of the insertion arm 11 is connected to the transfer path. 3, the cam groove 15 is engaged with a cam groove 15 having a curved portion 14 approaching in the width direction in the middle of the cam groove 3 in the transfer direction. The cam groove 15 is provided in an endless manner on the side of the transfer path 3 in the same way as the chain 9, and when the insertion arm 11 runs together with the chain 9, the insertion arm 11 moves into the curved portion 14 of the cam groove 15. It reciprocates in the width direction of the transfer path 3 to push the article 2 into the packaging box 1 as described above. Article 2
The packaging box 1 into which the
As shown in the figure, the corner part 16 of the opening 5 is folded in by the folding device 17, but in the case shown, there are two through holes 1 in the side transfer path 3 along which the packaging box 1 runs.
8 and 18, through which the claw pieces 19 swing and project from below the transfer path 3 to fold in the four corners 16 of the packaging box 1.

For example, as shown in FIGS. 4 to 6, the claw pieces 19 are provided in two sets on the left and right, with the roots of each claw piece 19 being arranged horizontally below the transfer path 3. are attached to rotatable horizontal shafts 20a and 20b, respectively, and when one horizontal shaft 20a is rotated by the swinging of an arm piece 21 provided at one end, the other horizontal shaft 20b is rotated in the opposite direction via gears 22 and 23. direction, so that the claw pieces 19 of each set swing inwardly relative to each other. Each of the horizontal shafts 20a, 20b further includes a moving member 24, for example, a pair of sliding rods, which is provided below the transfer path 3 so as to be slidable along the traveling direction thereof.
A cam 26 is attached to the moving member 24 via a support plate 25, and is provided opposite the rear ends of both moving members 24, 24.
When it rotates, both moving members 24, 24, which are connected to each other by a connecting rod 27, simultaneously slide in the direction of the transfer path. 28, 28 are return springs wound around the moving members 24, 24.

Further, on the machine frame 29 on the sides of the horizontal shafts 20a and 20b, a substantially V-shaped cam piece 32 is prevented from turning in one direction by a stopper 30, and is pulled by a spring 31 so as to always come into contact with the stopper 30. is the support shaft 32
a, the movable member 24,
When the horizontal shaft 20a moves in the transfer direction as the horizontal shaft 24 moves, the arm piece 21 provided integrally with the horizontal shaft 20a rides on the V-shaped outer edge of the cam piece 32 and swings, and as a result, the horizontal shaft 20a and The integral claw piece 19 is rotated inwardly, and the gear 22 is rotated in the opposite direction.
23, the other horizontal shaft 20b and the claw piece 19 are rotated, and thus the claw piece 19 moves in the transfer direction of the transfer path 3 and protrudes upward through the through holes 18, 18. The moving speed of the moving members 24, 24 is controlled by a cam 26 that drives them so that it is approximately the same speed as the moving speed of the packaging box 1 moving on the transfer path 3. The operating timing of the moving members 24, 24 is controlled so that the claw pieces 19 protrude when the packaging box 1 reaches the transport path 3 near the upper part of the cam piece 32 which rotates. 33 is a holding device that prevents the packaging box 1 from floating when the claw piece 19 comes into contact with the corner 16 of the packaging box 1; 34 is a group of rollers provided in the device 33;
3 and the transfer path 3.

Incidentally, when the arm piece 21 integrated with the horizontal shaft 20a gets over the V-shaped cam piece 32, the return spring 21a returns the arm piece 21 to its original state, so that the claw piece 1
9 and 19 return to the lower part of the transfer path 3 while opening, and when the moving members 24 and 24 move back under the control of the cam 26, the arm piece 21 is inserted into the V hole of the V-shaped cam piece 32.
enters the cam piece 32 and swings the cam piece 32 with the arm piece 21 around its shaft 32a, and then moves back.
9 and 19 can be moved back without protruding onto the transfer path 3.

The corner portion 16 is folded in the folding device 17,
The packaging boxes 1, which have been wrapped so that the articles 2 inside do not fall out, are sequentially sent to a transfer path 36 of a stacking device 35 that is continuous with the transfer path 3, and a certain number of the boxes are separated by an upright device 37 provided in the device 35. After being made to stand up, they are accumulated, folded into a U-shape, and sent from the side of the opening into the outer case 39 of the outer case packaging device 38 that is waiting, and the outer case 39 is sealed. The packaging is finished. Details of the accumulating device 35 are shown in FIGS. 7 to 1.
0 as shown. That is, an upright device 37 provided in the forward direction of the transfer direction of a transfer path 36 consisting of rollers grips the packaging box 1 within a ten-shaped gripping frame 41 that runs together with two chains 40, and The arm piece 4 integrated with the gripping frame 41 is attached to the cam 42 provided in the
3 is lifted, the gripping frame 41 and the packaging box 1 in its opening are also raised and sent to the end of the chain 40, and when the chain 40 is lowered, the lower end of the packaging box 1 in the upright state is held on a table. It is supported at the front end of 44. The front surface 1a of the upright packaging box 1 is temporarily supported by swing plates 45 provided on the upper left and right sides of the table 44, and the short frame 41a of the gripping frame 41 moves downward from the front of the packaging box 1 as the chain 40 descends. When the packaging box 1 is moved out, the roller arms 46 that swing intermittently push the left and right sides of the back of the packaging box 1, pushing it between the holding frames 47 provided on the left and right sides above the table 44. A material with relatively high friction, such as rubber, is adhered to the inner surface of both clamping frames 47, and the packaging box 1 is supported in an upright state by the friction. The packaging boxes 1 are successively pushed between the two holding frames 47, and when a plurality of boxes are accumulated, they are sent to the front stopper 51 by belts 48, 49, 50 provided on the lower surface of the table 44 and on the left and right upper sides of the table 44 in order. The stopper 51 is slidable along a guide rod 52 and is connected to a small air cylinder 53.
When a certain number of packaging boxes 1 accumulate in front of the stopper 51, the small air cylinder 53 operates in front and behind them to move the arms. It is supported by the piece 54 and the stopper 51, and the moving frame 55 is connected to the air cylinder 56.
When the table 44 is driven, it is carried out all at once further forward of the table 44. These fixed number of packaging boxes 1 have arm pieces 54
and the stopper 51, the table 44
A pair of lateral support plates 59, 59 are pushed forward from the side by an air cylinder 57.
being pushed between. When this extrusion is completed, the moving frame 55 also returns to its original position, and the packaging boxes 1 sent out from the upright device 37 are again stacked up to a certain number. This pushing plate 58 operates one of its two reciprocating operations with a large stroke, and thereby, the amount of accumulation for two times including the packaging box 1 waiting between the support plates 59 and 59 is carried out at once. Then, it is fed into the outer box 39 of the outer box packaging device 38.

Details of the outer box packaging device 38 are shown in FIGS.
3, the unfolded outer case 39 pulled out from the magazine is folded into a U-shape by a U-shaped molding frame 60 that descends from above, and the above-mentioned packaging is inserted from the side opening. Two stacks of boxes 1 are sent by the pushing plate 58, and when this is finished, the outer box 39 is sent to the side by the pushing piece 61a attached to the chain 61 below. At this time, the top plate folding member 63 and the pair of left and right side flap folding members 64 protruded by the air cylinder 62 are inserted into the outer case 39.
rear top plate 39a and rear side flap 39
b, 39b are folded in as shown in the second figure, and upper plate folding members 65 and a pair of left and right side flap folding members 66 are respectively provided on both left and right sides and above in the forward direction of movement of the chain 61. Fold the top plate 39c and the front side flaps 39d, 39d inward. Adhesive is applied to the outer surfaces of the folded side flaps 39d, 39d, and while the outer case 39 is being transported, a pair of upper and lower opening/closing rods 67 provided on the left and right sides of the outer case 39 open the outer flaps 39e, 39e. Fold in. After that, sealing tape is applied to the seam and the package is sent out.

(Effects of the Invention) As described above, in the present invention, the movable member is reciprocated together with the folding device by the cam along the transport direction of the packaging box on the transport path, and the folding device is placed on the side of the movable member. Since the cam piece that swings the claw piece is provided, when the packaging box with the opening for inserting the article moves on the transfer path, the corner part of the packaging box can be moved with the claw piece without stopping the movement. It is possible to form a folding part that is folded inward of the opening and automatically prevents the articles from falling out of the packaging box, allowing the packaging work to be performed efficiently and economically, and the reciprocating movement of the movable member is Since this is done by connected cams, the configuration is simple, and the same number of claw pieces as the number of folding points, for example, 4.
Providing book claws allows a large number of moving packaging boxes to be sequentially folded, and has the effect of reducing the size of the folding device.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the apparatus of the present invention, Fig. 2 is a line diagram showing the packaging process for articles, Fig. 3 is an enlarged plan view of the main part of Fig. 1, and Fig. 4 is a cutaway side view thereof. , Fig. 5 is a plan view of the main parts of the folding device, Fig. 6 is a partially cutaway side view, Fig. 7 is a side view of the upright device, and Fig. 8 is a side view of the main parts of the stacking device. , FIG. 9 is a plan view thereof, FIG. 10 is a sectional view taken along the line -- in FIG. 9, FIG. 11 is a plan view of the outer box packaging device, FIG. 12 is a side view thereof, and FIG. FIG. 1...Packaging box, 2...Goods, 3...Transfer route, 5
...Opening, 16... Corner, 17... Folding device, 19, 19... Claw piece, 24... Moving member, 2
6...cam, 32...cam piece.

Claims (1)

[Claims] 1. A moving member that moves in the transport direction at approximately the same speed as the transport speed of the packaging box is provided along the transport path of the packaging box having an opening for inserting the article, and the packaging box is folded onto the moving member. In a device in which a folding device equipped with a claw piece that swings to fold the folding device is attached, a cam is connected to the movable member so that the movable member is reciprocated together with the folding device, and the movable member is moved sideways. A packaging box folding device characterized in that a cam piece is provided for swinging a claw piece of the folding device so as to fold a corner of the packaging box inward into an opening when the moving member is operated.