JPS63278829A - Bottom folding device for carton - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a carton bottom folding device that automatically folds the front, rear, left, and right flaps of the bottom of a carton made of corrugated paper or the like containing goods.

(Prior Art) A conventional carton bottom folding device folds the rear flap forward with a folding member while the carton fed on a suitable conveying means is temporarily stopped. is a front flap bending member in a fixed state and is bent backward as the carton advances, and the left and right side flaps are bent by side flap bending members disposed on the left and right as the carton advances.

[Problem that the invention seeks to solve]

The conventional carton bottom folding device as described above is suitable for packaging products in which the bottom surface of the product protection frame made of styrene foam or the like is flat to receive the products contained in the carton. Therefore, in the case of receiving material with a flat bottom surface, there is no problem in feeding it as is to the bottom folding device, but
If the bottom of the receiving member of the product is uneven, the convex portion of the bottom may be damaged.

[Means for solving problems]

In order to solve the above problems, the present invention includes a pair of left and right transport belts that can be opened and closed to sandwich both sides of an incoming carton and transport it forward; a stopper that can be freely raised to advance together with the carton; a plurality of front receiving rollers that are integrated with the stopper and move forward together with the protrusion while supporting the lower front protrusion of the product protection frame contained in the incoming carton; It has a plurality of rear receiving rollers that support the lower rear projections of the product protection frame in the carton that moves forward together with the stopper, and as described above, the rear projections of the product protection frame rest on the rear receiving rollers and the stopper It consists of a carton pushing member that pushes down the carton under stopped conditions, and a rear flap bending member that folds the rear flap of the pressed carton forward,
After folding the rear flap, the transfer belt is activated to advance the carton over the stopper in the lowered position, thereby folding the front flap at the bottom of the carton backward, and then folding the left and right side flaps. The flaps on both sides can be bent by a member.

[Effect]

Since this invention has the above-described configuration, when the detector detects that a carton storing products protected by the product protection frame has entered between the left and right transport belts, the above-mentioned two-type transport belt moves between the cartons. Begin transporting the carton forward with both sides in between.

The stopper is initially at the most retracted position together with the front receiving roller, and the rear receiving roller is further rearward, so the protrusion on the lower front side of the product protection frame in the carton that enters the carton passes through the rear receiving roller and then moves to the front. As the carton rests on the receiving roller and moves by pushing the stopper, the front protrusion also moves while remaining on the front receiving roller.

When some kind of detection means detects that the protrusion on the rear lower side of the product protection frame in the carton transferred by the transfer belt is placed on the rear receiving roller, the transfer belt stops, and then the upper push-down is performed. As the member descends and pushes down the carton, the carton is pushed down until the fold of the lower flap meets the line of the upper edge of the front and rear receiving rollers.

Next, the rear flap bending member works to bend the rear flap forward, but at this time, the rear receiving roller is moved slightly forward so that there is no problem in folding the rear flap.

After folding the rear flap, the stop is lowered and the transport belt then advances the carton so that the front flap is folded rearward by the stop.

When the carton that has passed over the stopper enters between the transfer belts of the picker, these belts approach the carton and sandwich it, and while the carton is being advanced, the left and right side flaps are folded, and this folding part is known in the art. There is no difference from the method of

(Embodiment) In the embodiment shown in the drawings, 1 is a conveyor for supplying cartons 2, and as shown in FIG. Put 4.

In addition, there are 2 left and right at the bottom of the front and rear protective frames 3, respectively.
A protrusion 5 is integrally provided at the location.

In this way, the product 4 with the protective frame 3 attached is placed on the conveyor 1, and then the carton 2 whose lower flap is not folded is placed over it.

In front of the conveyor 1 are a pair of left and right rear transfer belts 8.
is located.

As shown in FIG. 2, the belt 8 wraps around the front and rear pulleys 10 of a pair of left and right movable frames 9, and the inner side of the belt 8 that contacts the carton is supported by a plurality of receiving rollers 11, and the front part A drive means 7 such as a motor drives the pulley 10 of
Drive with.

Reference numeral 12 in FIG. 2 denotes left and right main frames that support the entire device of this embodiment, and the left and right movable frames 9 are provided with the front ends of a pair of front and rear levers 15 whose rear ends are rotatably attached to each main frame 12. is rotatably mounted.

The rear ends of the front left and right levers 15 are fixed to the upper ends of vertical shafts 16 rotatably attached to the main frame 12, and the lower ends of both shafts 16 are equipped with sprockets 17 of the same diameter.
to be fixed.

Reference numeral 20 in FIG. 7 denotes a pair of left and right chains engaged with the left and right sprockets 17. Both ends of the chains are connected to both ends of a connecting frame 21 and a connecting tool 22, and the connecting tool 22 is passed through the frame 21 in the form of a sash. The left and right sprockets 17 are rotated by the same angle in opposite directions, and one shaft 16 is driven by a driving means 23 such as an air cylinder shown in FIG.

25 in FIG. 1 is a horizontal shaft rotatably attached to the main frame 12, and this horizontal shaft 25 has a rear flap bending member 2.
6 is fixed, and the horizontal shaft 25 is rotated by a driving means 27 such as an air cylinder shown in FIG.

Reference numeral 28 shown in FIG. 1 etc. is a pair of left and right guide rods in the front and back direction fixed near the inner lower part of the main frame 12, 29.30 is a sliding base that advances and retreats along this guide bar 28, and 31.32
is a driving means such as an air cylinder that drives this sliding table 29, 30.

The slide table 29 moves forward and backward in the vicinity of the lower part of the operating part of the member 26, and two horizontal guide rods 35 are fixed thereon, front and rear. The lower ends of the pair of support frames 36 are slidably attached.

A plurality of rear receiving rollers 37 are rotatably mounted inside the upper end of the support frame 36 to receive the protrusions 5 at the bottom of the protection frame 3.

On the sliding table 29, two feed screws 38 are rotatably mounted, as shown in FIG.

Both feed screws 38 are engaged with gears 39 fixed to their inner ends so as to rotate in opposite directions, and the feed screws 38 are screwed into threaded cylinders 40 provided on each of the support frames 36.

sprocket 4 on the outer end of the -1 one-way feed screw 38.
1 is fixed, and this sprocket 41 is as shown in Fig. 3.
Sprocket 4 driven by drive means 42 such as a motor
3 through a transmission chino 44.

With the above structure, even if the direction of twist of the feed screw 38 is made the same, the left and right support frames 36 move by the same amount in opposite directions.

Furthermore, as shown in FIG. 3, on the outside of each support frame 36,
Oblique guide plates 39 are fixed to both support frames 36 for opening outward the side flaps on both sides of the lower part of the carton 2 which have been covered from above.

Two horizontal guide rods 45, front and rear, are fixed also on the rear part of the sliding table 30 located at the front of the sliding table 29, and a pair of left and right mounting frames 46 as shown in FIG. 4 are attached to the guide rods 45. Install it so that it can slide freely.

Further, the above-mentioned re-attachment frame 46 is also configured to move in opposite directions by a mechanism similar to that of both the support frames 36.

Reference numeral 47 in FIG. 4 denotes its driving means, and a column 51 is mounted on the rear end of the arm 48 fixed rearward from the remounting frame 46.
A support frame 52 supported by the protective frame 3 is provided, and a plurality of front receiving rollers 53 are rotatably attached to the outside of the support frame 52 so that the projections 5 at the lower part of the protective frame 3 are received by the receiving rollers 53.

As shown in FIG. 1, an elevating table 56 that is vertically raised and lowered by a plurality of guide rods 55 is provided at the center of the sliding table 30 near the front, and a pair of left and right support plates extend rearward and upward from the elevating table 56. A bent stopper 58 is fixed to the rear end of both support plates 57, and the vertical surface of the stopper 58 is fixed to the rear end of both support plates 57.
Just before the group.

Reference numeral 59 in FIGS. 1 and 4 is a driving means such as an air cylinder fixed to the front lower side of the sliding table 30, and its rod is connected to the lower end of the lifting table 56 to raise and lower it. .

Reference numeral 61 in FIGS. 1 and 2 is a guide plate fixed between the main frames 12, which is fixed from the vicinity of the attachment part of the stopper 58 toward the front, and on both sides of the guide plate is the lower part of the carton 2 that slides on the guide plate 61. Rod-shaped side flap bending members 62 are provided for folding the side flaps on both sides inward.

A pair of left and right front transport belts 65 are arranged on both sides above the guide plate 61 .

As shown in FIG. 2, each belt 65 has its front and rear folded portions wrapped around the front and rear pulleys 67 of a pair of upper and lower movable frames 66, and the inner side of the belt 65 on the side that contacts the carton 2 is supported by a plurality of receiving rollers 68. , a front pulley 67 is driven by a driving means 64 such as a motor.

The front ends of a pair of front and rear levers 69, whose rear ends are rotatably attached to each main frame 12, are rotatably attached to the left and right movable frames 66.

The rear ends of the front left and right levers 69 are fixed to the upper ends of vertical shafts 70 rotatably attached to the main frame 12, and the lower ends of both shafts 70 are equipped with sprockets 71 of the same diameter.
to be fixed.

Reference numeral 72 in FIG. 5 denotes a pair of left and right chains 7 held on the left and right sprockets 71, and both ends thereof are connected to both ends of a connecting frame 73 and a connecting tool 74, and the connecting tool 74 is passed through the frame 73 in the form of a sash. The left and right sprockets 71 are rotated by the same angle in opposite directions, and one shaft 70 is driven by a driving means 75 such as an air cylinder.

Reference numeral 77 in FIGS. 1 and 2 denotes a guide plate fixed between the front ends of the left and right bending members 62, and a plurality of conveyance rollers 78 are provided in front of the guide plate, and a belt conveyor 79 for carrying out is provided in front of the guide plate.

Reference numeral 81 in FIG. 1 is a support frame installed on the rear part of the main frame 12. A carton pressing member 82 is positioned below this support frame 81, and a plurality of guide rods 83 fixed to the upper part of the support frame 81 are placed on the support frame 81. The member 82 is inserted into a guide so that it can be raised and lowered freely, and this member 82 is raised and lowered by a driving means 84 such as an air cylinder.

In the embodiment described above, initially the left and right transport belts 8 and 65 and the left and right support frames 36,62 are maximally open. Further, the rear flap bending member 26 is horizontal, the push-down member 82 is at the highest position, and the sliding base 29.30 is at the most retreated position, that is, toward the left in FIG. A group of receiving rollers 53 is located at.

In the above state, the drive means 32 is in a free state, that is, in the case of an air cylinder, the slide table 30 is pushed backward with a weak pressure, or the front and rear sides of the air cylinder are open to the atmosphere, and the conveyor 1 transports the goods. The carton 2 containing the products 4 protected by the protection frame 3 is sent between the left and right transfer belts 8. When an appropriate detector detects that the tip of the carton 2 enters between the belts 8, the drive shown in FIG. Means 23
If it is an air cylinder, it is operated by relatively low pressure compressed air to drive the left and right levers 15 inward to move each belt 8 inward, and to move the carton 2 with a pressure that does not damage the carton 2. Sandwich.

As described above, the driving means 23 works (simultaneously, the driving means 42 and 47 in FIGS. 3 and 4 also work to move the left and right support frames 36 and 52 inward, and as described above, the left and right belts 8 When the driving means 23 stops with the carton 2 in between, the driving means 42 and 47 also stop, and each of the roller groups 37 and 53 is placed at a predetermined position inside the carton 2.

As described above, the left and right belts 8 sandwich the carton 2, and at the same time that each of the roller groups 37 and 53 is at a predetermined position, the carton 2 is advanced by driving the belt 8 by the driving means 7.
The tip pushes the stopper 58 as shown in FIG. 8, and the protrusion 5 of the protective frame 3 rests on the group of rollers 53.

At this time, the stopper 58 is free, so the stopper 58
, the group of rollers 53 moves forward together with the carton 2.

In this way, the carton 2 moves forward, and the detector detects that the protrusion of the protective frame 3 at the rear end is positioned above the group of rollers 37 located at the rear, as shown by the chain line in FIG. 1 and in FIG. 9. When detected, the left and right belts 8 stop running, and the rear flap bending member 26, which had been horizontal until then, becomes diagonally downward as shown in FIG. 9 by the action of the driving means.

Then, the push-down member 82 is lowered by the action of the driving means 84, pushing down the carton 2 as shown in FIG.
When the detector detects that the folds at the upper ends of the flaps 86 to 88 surrounding the 7th group and the 53rd group of rollers have descended to a position where they coincide with the top surface of the 37th and 53rd groups of rollers, the pressing member 82 stops and the carton 2 It rises leaving behind.

As described above, when the carton 2 is pushed down, the rear flap 87 is slightly bent forward by the member 26 as shown in FIG. It is slightly bent outward.

As described above, under the condition that the carton 2 has been lowered to a certain position, the driving means is activated, and the member 26 is rotated forward and upward as shown in FIG. 12 to bend the rear flap 87 forward. At this time, the driving means 31 operates to advance the rear roller group 37 so that the roller group 37 does not get in the way of folding the flap 87.

When the rear flap 87 is completely bent as described above, the driving means 59 shown in FIG. 1 works to lower the stopper 58 as shown in FIG. . When Carton 2 starts moving,
The lower end of the front flap 86 is bent rearward by the stopper 58 as shown in FIG.

The carton 2 with the front and rear flaps 86 and 87 completely folded in this way is placed on the guide plate 61 and moves forward. When the detector detects that the tip of the carton 2 has begun to enter between the left and right transfer belts 65, the drive means 75 works, the shaft 70 is driven in the same way as the drive means 23, and the left and right belts 65 sandwich both sides of the carton 2 by the action of the left and right levers 69 interlocked with this, and the drive means 64 drives the shaft 70.
is driven in the direction of the arrow in FIG. 2, and the carton 2 is continuously transported forward.

Since the side flap bending members 62 are disposed on both sides of this portion, the side flaps 88 are initially bent slightly inward by the members 62 as shown by the chain line (a) in FIG. 14, and then As it advances, it bends further inward as shown by the solid line, and near the end it becomes almost horizontal as shown by the chain line (b).

FIG. 15 is a side view of the folded state of the side flap 88, and it can be seen that the flap 88 is folded as the carton 2 moves forward to the right.

In this way, the side flap 88 that has passed through the member 62 becomes completely horizontal when it passes over the guide plate 77, and is sent out onto the conveyor 79 for carrying out, passing over the conveying roller 78.

As described above, after the carton 2 has passed, the left and right transfer belts 8.65, support frames 36.52, stoppers 58, etc. quickly return to their initial states. Moreover, since the belt 8 and the belt 65 are operated by separate driving means, there is no problem even if a carton 2 of a different width enters between the belts 8 while the carton 2 sandwiched by the belt 65 is being transported forward.

〔effect〕

As described above, in this invention, the receiving rollers in the retracted position support the protrusions on the front left and right sides of the lower side of the protective frame of the product stored in the carton, which is transported by a pair of left and right transfer belts, and the carton is transported by a pair of left and right transfer belts. There is no risk of damage to the protrusions as they move forward together.

In other words, conventionally, the protective frame inside the carton rests on a stationary support stand, so if there is a small protrusion at the bottom of the protective frame, this protrusion may collide with the edge of the support stand and cause damage. However, in the case of the present invention, when the protrusion of the protective frame is placed on the receiving roller, the receiving roller rotates to eliminate the impact and moves together with the carton, so there is no risk of damage even if the protrusion is small.

In addition, since the front receiving roller moves forward together with the stopper that the carton presses, there is no risk of this receiving roller coming off the protrusion of the protective frame, and the protrusion of the rear protective frame also rests on the rear roller group, so the carton is stable. It has the advantage of being able to move smoothly by being placed on a group of rollers.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing one embodiment of the device of the present invention, FIG. 2 is a plan view of the same as above, FIG. 3 is an enlarged longitudinal sectional front view taken along line A-A in FIG. Enlarged longitudinal sectional front view of line B-B,
Fig. 5 is an enlarged front view, Fig. 6 is a partially cross-sectional enlarged plan view of the rear sliding table, Fig. 7 is an enlarged plan view of the rear left and right transfer belt opening/closing mechanism, and Figs. 8 to 1O are cartons. FIG. 11 is an enlarged longitudinal side view showing the state of entry, FIG. 11 is a longitudinal front view of the state shown in FIG. 10, FIGS. 12 and 13 are enlarged longitudinal side views of the front flap in the folded state, and FIG. FIG. 15 is an enlarged longitudinal sectional side view showing the bent state of the folded flap, FIG. 16 is an enlarged longitudinal sectional side view showing the folded carton in its unloaded state. 1... Supply conveyor, 2... Carton, 3... Product protection frame, 4... Product, 5
...Protrusion, 8 ... Rear transfer belt, 26 ... Rear flap bending member, 36 ...
... Rear support frame, 37 ... Rear receiving roller, 52 ... Front support frame, 53 ...
Front receiving roller, 58... Stopper, 61...
. . . Guide plate, 62 . . . Side flap bending member, 65 . . . Front transfer belt. ε4'/3 factors β40 L'560 Figure 5

Claims (1)

[Claims] A pair of left and right transfer belts that can be opened and closed to sandwich both sides of an incoming carton and transport it forward; a stopper that can be raised and lowered to contact the front of the incoming carton and move forward together with the carton; A plurality of front receiving rollers move forward together with the protrusions while supporting the protrusions on the lower front side of the product protection frame contained in the incoming carton, and the lower part of the product protection frame inside the carton moves forward together with a stopper. It has a plurality of rear receiving rollers that support the protrusions at the rear of the side, and when the protrusion at the rear of the product protection frame rests on the rear receiving rollers and the stopper stops as described above, the carton is pushed down. and a rear flap folding member that folds forward the rear flap of the pressed carton, and after folding the rear flap, activates the transfer belt to advance the carton onto the stopper in the lowered position. A carton bottom folding device characterized in that the front flap at the bottom of the carton is folded backward, and then both side flaps are folded by left and right side flap folding members.