JPH0740936A - Can body sealing method and can body sealing machine - Google Patents

Abstract

PURPOSE:To automatically and contiuously seal the total periphery of an overlapped part of a can using a pair of sealing tapes in such a manner that the release location can be secured. CONSTITUTION:A can which is carried in by a carrying device 2 is primarily pushed out and secondarily pushed out. Before and after these push out processes, a pair of sealing tapes T, T are made to go across the carrying path of the can by the carrying device 2, joins the adhesive surface to each other, by sticking mechanisms 61, 62 of a sticking device. Then, the adhesive part is cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can body sealing method and a can body sealing machine.

[0002]

2. Description of the Related Art In general, a can body is composed of a can body containing a product and a lid body covering an upper opening of the can body.
A sealing tape is attached to the overlapping portion of the can body and the lid body in the can body for sealing. In order to seal the overlapping portion of the can with a sealing tape, a sealing machine including a rotatable table and a sealing tape feeding device is used. In this sealing machine, the can body is placed on the table, one end of the sealing tape is attached to the overlapped portion, and then the can body is rotated once so that the seal tape is attached to the overlapped portion while being unrolled. It has a lap margin and is wound once.

[0003]

However, in such a sealing machine, in addition to carrying in the can body to be sealed and carrying out the can body with the sealing tape attached, the structure is complicated. However, there was a problem that skill was required for handling. Therefore, it is possible to install a robot for loading and unloading cans, but there is a drawback that the cost increases. In addition, since the tape base material of the sealing tape attached to the polymerized portion of the can body by one wrapping with such a sealing machine is usually transparent, when the purchaser of the product peels off the sealing tape, There was also the problem of being confused without knowing the peeling position.

The present invention has been made in view of the above problems, and a can capable of automatically sealing the overlapping portion of the can body so that the peeling position can be grasped by using a pair of sealing tapes. A method for sealing a body and a sealing machine for a can body are provided.

[0005]

According to the method for sealing a can of the present invention, at least one of a pair of sealing tapes arranged so that their adhesive surfaces face the polymerized portion of the can is traversed through the conveying path of the can. After pulling out and adhering those adhesive surfaces to each other, cutting the adhesive part to form a pasting piece before and after, and then extruding the can body first to form a sealing tape on the front side of the overlapping part. After the sticking, the can body is secondarily extruded to its stop position with the transport path of the can body open, and the pair of sealing tapes are pulled out, and then the can body is continuously extruded after the part that has been adhered when the can body is first extruded. While sticking to both sides of the overlapping part of the, the can body that has been sealed with the sealing tape is pushed out first, and then at least one of the pair of sealing tapes is pulled out again across the transport path of the can body. In addition, a sealing tape is attached to the rear surface side of the polymerized portion of the can body, the adhesive surfaces are adhered to each other, and the adhesive portion is cut to form a pasting piece before and after. is there.

Further, the can body sealing machine according to the present invention is provided with at least a feeding device for pushing the loaded can body along the carrying path and a carrying device for preventing movement of the can body, and a carrying device in this carrying device. An elevating frame composed of a pair of elevating tables, each of which is arranged across the transport path of the can body and in which each sealing tape roll body is rotatably supported, and installed on each elevating table of this elevating frame, each at the tip. An affixing device including a pair of affixing mechanisms provided with taping blocks, and an elevating device that elevates and lowers a pair of elevating tables of an elevating frame with respect to a carrier device. The sealing tape of the sealing tape roll body on each lifting table is pulled out to the tip surface with its adhesive surfaces facing each other. On the other hand, one taping block is configured to be movable back and forth between a feeding position facing the transport path of the can body and a position abutting the other taping block, and one taping block is equipped with a cutter blade that can move back and forth. , The at least one taping block is moved forward from the feeding position facing the transport path of the can body until it comes into contact with the other taping block across the transport path of the can body, thereby adhering the adhesive surfaces of the pair of sealing tapes to each other. The adhering portion is cut by advancing the cutter blade to form the pasting piece in the front and back.

[0007]

In the pair of sealing tapes, the adhesive surfaces of the pair of sealing tapes are adhered to each other across the conveying path of the can body to form a bonded piece, and the adhesive surfaces are made to face the superposed section of the can body. Here, by carrying out the primary extrusion of the carried-in can body, the front side of the superposed part is brought into contact with the sealing tape drawn out across the transport path of the can body to be adhered thereto. Then, after the conveying path of the can body is opened, the can body is secondarily extruded to the stop position so that the pair of sealing tapes are pulled out and attached to both side surfaces of the overlapping portion. At this time, the can body that has been sealed with the sealing tape is pushed out first.
Further, at least one of the pair of sealing tapes is again drawn across the conveying path of the can body, the sealing tape is attached to the rear surface side of the polymerized portion of the can body, and the adhesive surfaces are adhered to each other, and then the adhesive Cut the parts to form the back and forth pieces.

As a result, before and after the carrying process of the primary and secondary extrusion of the can body, a pair of sealing tapes are cut across the carrying path of the can body so that their adhesive surfaces adhere to each other and the adhesive portions are cut. Since the entire circumference of the overlapping portion of the can is reliably and automatically sealed by a simple work of forming a bonded piece, it is unnecessary for the operator to carry in and carry out the can. Labor saving can be achieved. Further, since the pair of sealing tapes attached to the can has the ear-shaped sticking pieces whose adhesive surfaces are adhered to each other, the peeling position of the sealing tapes can be reliably grasped.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sealing machine 1 of the present invention. The sealing machine 1 is provided with a carrier device 3 for a can body K provided on a pedestal 2 and a carrier device 3 sandwiched therebetween. It comprises an elevating frame 5 which can be raised and lowered through an elevating device 4, and a sticking tape T sticking device 6 installed on the elevating frame 5.

First, as shown in FIG. 1, the gantry 2 is fixed to a gantry main body 21 provided with a stretchable support leg 24 and a rollable roller 25, and a pedestal main body 21 via a support rod 23. It is composed of an upper mount 22 and can be supported by the support legs 24 after being moved to the working position by the roller 25.

On the other hand, the conveying device 3 for the can body K, as shown in detail in FIG. 3, is a supply conveyor 31 (see FIG. 2) provided on the gantry body 21 of the gantry 2, and this supply conveyor 3
A plurality of roller conveyors 32 that are connected to the conveyance surface 1 and are rotatably supported on the upper base 22 of the pedestal 2; and a plurality of roller conveyors 32 that are connected to the conveyance surface of the roller conveyor 32 and that are mounted in a direction parallel to the axial direction. Conveyor rail 33 extended on the table 22
And the gantry body 21 located at the tip of the carrier rail 33.
And a motor roller 35 that is provided on the gantry body 21 and that carries the can body K out of the sealing machine 1.
And a feeding device 3 for pushing out the can body K carried on the roller conveyor 32 in the axial direction of the roller conveyor 32, which is the direction orthogonal to the conveying direction of the can body K by the supply conveyor 31.
6, the supply conveyor 31, the roller conveyor 32, and the transport rail 33 form a transport path for the can body K.

On both sides of the supply conveyor 31, on the downstream side of the roller conveyor 32 and on both sides of the transport rail 33,
As shown in FIG. 2, the guides 37 of the can body K are fixed.

Here, the stopper 34 includes an L-shaped stopper body 341 rotatably supported by the gantry body 21.
An air cylinder 342 arranged between the stopper body 341 and the gantry body 21. The extension / contraction operation of the air cylinder 342 causes the stopper body 341 to have its tip protruding from the conveyance surface of the conveyance rail 33 (see FIG. 3). Then, it can be selectively rotated into a state of being immersed under the transport surface of the transport rail 34.

The motor roller 35 has a built-in electric motor, and the can K can be carried out of the sealing machine 1 by its operation.

Further, the feeding device 36 is the roller conveyor 3
The first feed cylinder 361 which is located on the side of 2 and is fixed to the upper mount 22, and the first pusher which is fixed to the movable portion of the first feed cylinder 361 and is movable above the conveyance surface of the roller conveyor 32. 362, a second feed cylinder 363 located below the roller conveyor 32 and fixed to the gantry body 21, and a movable portion of the second feed cylinder 363 rotatably rotatably supported on the pedestal 22. Long hole 22a
(See FIG. 2) A plurality of second pushers 364 that protrude from the roller conveyor 32 and are movable along the roller conveyor 32, and the upper pedestal 22.
The first feed cylinder 361 and the second feed cylinder 363 are composed of a cam 365 fixed to the back surface of the
A rodless cylinder is used. A spring 366 is arranged between the movable parts of the second pusher 364 and the second feed cylinder 363.
The tip portion of the second pusher 364 is projected onto the conveyance surface of the roller conveyor 32 through the elongated hole 22 a of the upper frame 22 by the urging force of 66.

Further, as shown in FIG. 4, the second pusher 364 includes a pin 364a biased by a built-in spring so as to project laterally, that is, toward the side surface of the cam 365. On the other hand, a rear end of the cam 365 is formed with an inclined surface 365a that is inclined rearward when viewed from above and extends in a wedge shape from one side surface to the other side surface. An inclined surface 365b (see FIG. 3) is formed so as to incline from the lower surface to the upper surface.

Therefore, when the second pusher 364 moves forward, the pin 364a slides along the side surface of the cam 365 through the inclined surface 365a formed at the rear end thereof,
The tip portion of the second pusher 364 moves in a state of protruding beyond the conveyance surface of the roller conveyor 32. Then, when the second pusher 364 reaches the forward position, the pin 364a is disengaged from the cam 365 and is laterally projected by the urging force of a spring (not shown). On the other hand, when the second pusher 364 is retracted, the pin 364a slides along the lower surface of the cam 365 through the inclined surface 365b formed at the front end of the cam 365. Therefore, the second pusher 364 is indicated by the chain line in FIG. As described above, it rotates counterclockwise against the biasing force of the spring 366, and moves in a state of being immersed under the transport surface of the roller conveyor 32.

As a result, even when the second pusher 364 is retracted, it becomes possible to carry in the can body K by the supply conveyor 31, as will be described later, and the number of units processed per unit time is increased to improve work efficiency. Can be increased.

Therefore, when the supply conveyor 31 is operated, the can body K placed on the supply conveyor 31 moves to the roller conveyor 32.
Pushed out. And, the can body K is the roller conveyor 3
When it moves on the upper part 2 and reaches the guide 37 provided on the downstream side, the feeding device 36 operates and the can body K can be forcibly pushed out along the conveyance path until it comes into contact with the stopper 34. That is, when the first feed cylinder 361 operates, the can body K is pushed along the roller conveyor 32 in the axial direction by the stroke of the first pusher 362 and moved to a position facing the sticking device 6 described later. When the second feed cylinder 363 is operated, the can body K is pushed out along the transport rail 33 through the second pusher 364 by the stroke, and moved to the position where it abuts the stopper body 341. You can After that, the stopper body 341 is moved to the transport rail 3
When it is immersed under the transport surface of No. 3, the motor roller 35 is actuated and the can body K is carried out.

As shown in FIGS. 1 and 2, the lifting device 4 includes a rotary shaft 41 rotatably supported at a corner of the gantry body 21 and a handle fixed to the upper end of the rotary shaft 41. 42, a sprocket 43 fixed at an intermediate position of the rotary shaft 41, and a pair of lifts constituting the lift frame 5 arranged by sandwiching the transport rail 33 through the chain sprocket mechanism by the rotation of the handle 42 described above. 5
It is composed of a lifting mechanism for lifting A and 5B by the same amount. Since these elevating mechanisms have the same structure, the elevating mechanism for elevating the elevating table 5A will be described and the elevating mechanism for elevating the elevating table 5B will be omitted.

An elevating mechanism for elevating the elevating table 5A is fixed to the elevating table 5A and has a pair of screw shafts 44, 44 formed with screws having the same pitch, and the screw shafts 44, 4
Sprockets 4 each having a female screw 4
5, 46 and bearings 47, 47 fixed to the gantry body 21 so as to rotatably support the sprockets 45, 46 and prevent the vertical movement thereof.
The chain 48, 49 is wound between the sprocket 43 and the sprocket 45 fixed to the rotating shaft 41 and between the sprocket 45 and the sprocket 46, respectively.

Therefore, when the handle 42 is rotated, the sprocket 43 fixed to the rotation shaft 41 thereof is rotated, and the sprocket 45 and 46 sequentially wound around the sprocket 43 via the chains 48 and 49 are in the same direction. Rotate the same angle. At this time, the rotation of the two screw shafts 44, 44 respectively screwed into the sprockets 45, 46 is prevented, so that the screw shafts 44, 44, that is, the lifts 5A, 5B are equal in amount. It goes up and down. As a result, the pair of sealing tape rolls R and R, which are rotatably supported by the pair of lifts 5A and 5B of the lift frame 5, which will be described later, are transferred to the transport device 3
The elevating frame 5 whose height can be adjusted so as to face the overlapping portion of the upper can body K is, as described above, the pair of elevating stands 5A, 5 arranged with the transport rail 33 interposed therebetween.
A sealing tape roll body R is rotatably supported by these elevators 5A and 5B.
The sealing tape T of these sealing tape rolls R is
Since the spring (not shown) pulls it out through the arm 51 that is biased in the winding direction, it is prevented from loosening. And, in the lifts 5A and 5B,
As shown in FIG. 5, the pressing rollers 52, 52 are rotatably and axially supported facing the transport rail 33. Further, a sticking roller 53 and a plurality of guide rollers 54 are rotatably supported by the elevator table 5A so as to face the roller conveyor 32 and the transport rail 33, and the sealing tape T of the sealing tape roll R is sealed. Rolls the guide roller 54 and the sticking roller 53 so that the adhesive surface thereof faces inward, that is, the adhesive surface faces the overlapping portion of the can body K extruded onto the transport rail 33. Further, it is pulled out to the tip surface of the taping block 67 of the attaching mechanism 61 that constitutes the attaching device 6 described later. On the other hand, on the other lifting platform 5B, the transport rail 3
A holding guide 56 is attached via a stay 55 to prevent the can body K pushed out on the upper part 3 via the feeding device 36 from jumping up.

As shown in FIGS. 5 and 6, the sticking device 6 includes a sticking mechanism 61 arranged on the elevator 5A,
It is composed of a sticking mechanism 62 arranged on the lifting table 5B so as to face the sticking mechanism 61.

The one attachment mechanism 61 includes a cut cylinder 63 fixed to the lift table 5A and a cutter blade 6 connected to a piston rod 63a of the cut cylinder 63.
4, a stay 65 having a collar 65a slidably fitted to the piston rod 63a of the cut cylinder 63 and a collar 65b slidably fitted to a guide rod 66 provided on the lift 5A. It consists of a taping block 67 fixed to the tip of this stay 65, and pushers 63b, 63c are fixed to the piston rod 63a with the collar 65a sandwiched in the front and back. Here, the taping block 67 stands by at the feeding position of the sealing tape T facing the transport path 33 when the cut cylinder 63 is at the reduction position.

Therefore, when the cut cylinder 63 is extended, the cutter blade 64 fixed to the piston rod 63a thereof is advanced, and the tip thereof is taping block 6.
It projects beyond the tip surface of 7. Further, when the extension operation of the cut cylinder 63 is continued, the pusher 63b abuts the stay 65 and slides the stay 65 along the guide rod 66. As a result, the taping block is projected with the cutter blade 64 protruding from the tip surface. The 67 can be moved forward from the feeding position facing the transport path 33. On the other hand, when the cut cylinder 63 is contracted, its piston rod 6
The cutter blade 64 integrated with 3a is retracted and accommodated in the taping block 67. Next, the pusher 63c contacts the collar 65a, and the collar 65a, that is, the stay 65 is retracted along the guide rod 66. As a result, the taping block 67 integrated with the stay 65 can be retracted to the feeding position facing the transport path 33 with the cutter blade 64 accommodated. At this time, the collar 65b comes into contact with the buffer spring 68 attached to the guide rod 66 to prevent the cut cylinder 63 from reaching the stroke end and causing an impact.

The other attachment mechanism 62 includes an attachment cylinder 69 fixed to the lifting table 5B and a rod 70 fixed to a movable portion of the attachment cylinder 69.
A taping block 71 fixed to the tip of the rod 70, and a cam roller 72 fixed to the lift 5B to regulate the lateral shake of the rod 70. A rodless cylinder is used as the bonding cylinder 69. . Here, the taping block 71 stands by at the feeding position of the sealing tape T facing the transport path 33 when the rod 70 is at the retracted position by the bonding cylinder 69. The rod 70 has a taping block 71.
A sticking roller 73 and a plurality of guide rollers 74 having a diameter slightly larger than the width of the sealing tape T of the sealing tape roll R of the lifting table 5B are rotatably provided.
The guide roller 74 and the sticking roller 73 are wound, and the adhesive surface thereof faces inward, that is, the adhesive surface faces the overlapping portion of the can body K extruded onto the transport rail 33. It is pulled out to the tip surface of the taping block 71. Furthermore, taping block 71
A concave portion 71a (see FIG. 7) is formed at the tip end portion of the cutter blade 64, and the tip end portion of the cutter blade 64 of the pasting mechanism 61 described above can be accommodated therein.

Therefore, when the laminating cylinder 69 is operated, the rod 70 fixed to the movable portion thereof is moved forward while traversing the conveying rail 33 while being guided by the cam roller 72, and the taping block 71 fixed to the tip thereof is conveyed to the conveying path. The sealing tape T can be moved forward from the feeding position of the sealing tape T facing 33 and can be brought into contact with the taping block 67 of the pasting mechanism 61 facing the sealing tape T. As a result, the adhesive surfaces of the sealing tapes T, T that are pulled out with the adhesive surfaces facing inward to the tip surfaces of the taping blocks 67, 71 can be adhered to each other.

Incidentally, such a taping block 6
When the cutter blade 64 advances due to the extension operation of the above-mentioned cut cylinder 63 in a state where the adhesive surfaces of the pair of sealing tapes T, T are adhered by 7, 71,
The adhesive portions of the pair of sealing tapes T, T can be cut to form front and rear bonding pieces t, t described later. Here, the front bonding piece t is the end of the sealing tape T that seals the overlapping portion of the can body K, and the rear bonding piece t is
Is the starting end of the sealing tape T that seals the overlapping portion of the can body K. After that, when the cutting cylinder 63 is further extended, it is possible to overcome the pushing force acting on the bonding cylinder 70 with the cutter blade 64 protruding and push the bonding cylinder 70 by the stroke.
The pair of bonding pieces t, t held between the tip surfaces of the taping blocks 67, 71 are pushed out.

Next, the operation of the sealing machine 1 of the present invention will be described. First, in the initial state, the taping block 7 is used.
1 from the feeding position where the conveyance path 33 faces the conveyance rail 33.
And is in contact with the opposing taping block 67 standing by at the feeding position facing the transport path 33. Further, these taping blocks 67, 71
The sealing tapes T, T that have been pulled out to the front end surface of the tape are cut by the cutter blade 64 after the adhesive surfaces are adhered to each other to form a pair of bonding pieces t, t (the front bonding piece t). Is omitted). The bonding piece t is separated from the tip surfaces of the taping blocks 67, 71 by the pulling back of the sealing tapes T, T by the spring force acting on the arm 51. Further, the stopper body 341 projects beyond the transport surface of the transport rail 33. Here, when the start switch is operated, the supply conveyor 31 is operated, and the can body K placed on the supply conveyor 31 is conveyed to a position where it comes into contact with the guide 37 via the roller conveyor 32. Then, when the can body K contacts the guide 37, the operation of the supply conveyor 31 is stopped (see FIG. 7).

Next, the first feeding cylinder 361 of the feeding device 36 is operated, the can body K is pushed out in the axial direction of the roller conveyor 32 through the first pusher 362, and is brought into contact with the taping blocks 67 and 71 in the contact state. Let As a result, the sealing tapes T, T near the bonding piece t in which the overlapping portion of the corner of the can body K where the front surface and the left side surface intersect in the traveling direction are located on the side of the taping blocks 67, 71. Stick to the sticky side of. In this state, the bonding cylinder 6
9 is operated to retract the rod 70, that is, the taping block 71 to the feeding position facing the transport path 33, the sticking roller 73 provided on the rod 70.
However, since it rolls along the overlapping portion on the front surface of the can body K in the traveling direction, the portion where the sealing tape T on the lifting platform 5B side is first adhered to the corner portion of the overlapping portion of the can body K. Then, it is sequentially attached to the overlapping portion on the front surface of the can body K (see FIG. 8).

When the bonding cylinder 69 operates and the rod 70 retracts, the first feed cylinder 361 operates to retract the first pusher 362 to its original position,
The next can body K can be carried in.

On the other hand, when the taping block 71 is retracted to the feeding position facing the conveying path 33 by the operation of the bonding cylinder 69, the conveying rail 33 is opened and the can body K can be conveyed. Feeder 3
The second feed cylinder 363 of No. 6 is operated to push the can body K through the second pusher 364 onto the roller conveyor 32 and the transport rail 33 until the can body K contacts the stopper body 341. As a result, the sealing tapes T and T are pulled out by the advance of the can body K, and the sealing tapes T and T are sequentially attached to the overlapping portions on both left and right side surfaces of the can body K in the traveling direction (FIG. 9). reference). At this time, the sealing tape T on the lifting table 5A side is pressed by the sticking roller 53 to the overlapping portion on the left side surface of the can body K in the traveling direction and stuck.

When the sealing tapes T, T are attached to the overlapping portions on both side surfaces of the can body K, the supply conveyor 31 is operated and the next can body K is carried onto the roller conveyor 32, and at the same time, the laminating cylinder is attached. 69 to activate rod 7
0, that is, the taping block 71 is set to the transport rail 3
3 is moved forward until it comes into contact with the opposing taping block 67 from the feeding position facing 3. By the advance of the taping block 71, the sealing tape T wound around the front end surface thereof is pulled out, and at the same time, the attaching roller 73 provided on the rod 70 extends along the overlapping portion on the rear surface of the can body K in the traveling direction. After moving, the sealing tape T on the side of the lifting table 5B is sequentially attached to the overlapping portion on the rear surface of the can body K. Then, the taping block 71 is replaced by the taping block 67.
By abutting against, the adhesive surfaces of the pair of sealing tapes T, T are sandwiched and adhered (see FIG. 10).

Next, when the cut cylinder 63 is extended while the bonding cylinder 69 is being operated, first, the cutter blade 64 moves forward to move the pair of sealing tapes T,
The adhesive portion of T is cut, and the pasting pieces t and t are formed on the front and the back (see FIG. 11A).

Further, when the extension operation of the cut cylinder 63 is continued, the cut cylinder 63 having a large pushing force overcomes the pushing force of the pasting cylinder 69 and advances the piston rod 63a, and accordingly the pasting cylinder 69 is matched accordingly. Is pushed in, and the taping block 71 is slightly retracted while being in contact with the taping block 67. That is, the taping block 6
As a result of 7 moving forward, the front end portions of the sealing tapes T, T cut with the bonding piece t, are pulled out from the contact surfaces of the taping blocks 67, 71, and the rear surface and the left side of the can body K. Affixed to the overlapping portion at the corner where the faces intersect. As a result, the entire circumference of the overlapping portion of the can body K is attached and sealed by the pair of sealing tapes T, T. On the other hand, the tension of the cut rear sealing tape T, T is adjusted by the pulling back force of the arm 51, and the bonding piece t is sandwiched between the taping blocks 67, 71 (FIG. 1).
1 (b)).

After that, when the cut cylinder 63 is reduced, the cutter blade 64 first retracts, and then the taping block 67 retracts. At this time, a slight operation delay occurs in the bonding cylinder 69 with respect to the reduction operation of the cut cylinder 63, and a gap is instantaneously formed between the taping blocks 67 and 71, and then the bonding is performed so as to fill the gap. The cylinder 69 follows and operates. In this way, the gap is formed between the taping blocks 67 and 71, so that the cut rear sealing tapes T and T are cut.
The bonding piece t of is separated from between the taping blocks 67 and 74 by the pulling back force acting on the arm 51 (see FIG. 11C and FIG. 12).

Then, the second feed cylinder 363 of the feed device 36 is operated to retract the second pusher 364 and return it to its original position. At this time, as described above, since the second pusher 364 retracts in a state of being retracted below the transport surface of the roller conveyor 32, it does not interfere with the can body K previously loaded. Further, the air cylinder 342
Is contracted to rotate the stopper body 341 so that the stopper main body 341 is retracted below the conveyance surface of the conveyance rail 33.

This state corresponds to the work start position shown in FIG. 7, and the can body K previously loaded to the predetermined position on the roller conveyor 32 is operated by the operation of the first feed cylinder 361, that is, As a result of being pushed out through the first pusher 362 and abutting on the taping blocks 67, 71 in the abutting state, the overlapping portion at the corner where the front surface and the left side surface of the can body K intersect is tapped from the taping blocks 67, 71. The adhesive tape sticks to the sealing tapes T, T near the detached bonding piece t. Then, the rod 70 is operated by the operation of the bonding cylinder 69.
When is retracted, the overlapping portion on the front surface of the can body K is attached by the attaching roller 73 by the sealing tape T on the side of the elevating table 5B (see FIG. 13). Then, the first feed cylinder 361 is operated to retract the first pusher 362 to the original position.

Then, the second feed cylinder 363 is operated, and the can body K is pushed out along the roller conveyor 32 and the transport rail 33 by the second pusher 364. By the way, the can body K pushed out by the second pusher 364.
Since the sealing tapes T, T are previously attached to the overlapped portion of the entire circumference thereof and collide with the sealed can body K, the preceding can body K is also pushed out (see FIG. 14). In FIG. 14, the pair of bonding pieces t, t to be sandwiched between the can bodies K, K are omitted in relation to the drawing. When the next can body K is pushed out through the second pusher 364, the motor roller 35 is activated, and the sealed can body K pushed out through the can body K is carried out from the sealing machine 1. At this time, the can body K extruded through the second pusher 364 has the overlapping portions on both left and right side surfaces thereof sequentially attached by the pair of sealing tapes T, T as described above.

The center of gravity of the sealed can body K carried out by the motor roller 35 has a center of gravity of the motor roller 35.
As a result of tilting forward when the temperature exceeds the value, a space is formed between the rear surface of the sealed can body K and the front surface of the can body K pushed out by the second pusher 364, and this space is detected. Then, the air cylinder 342 is extended and the stopper body 341 is projected beyond the transport surface of the transport rail 33. Therefore, the can body K pushed out by the second pusher 364 comes into contact with the stopper body 341 and stops. On the other hand, when the carrying out of the sealed can body K is completed, the operation of the motor roller 35 is stopped.

The same operation is repeated thereafter, and as shown in FIG. 15, the entire circumference of the overlapping portion of the can body K has a pair of bonding pieces t,
affixed with a sealing tape T having T,
After being sealed, they are delivered one after another.

In this embodiment, the case where the overlapped portion of the rectangular cross-section can body is adhered with a pair of sealing tapes for sealing is described. It can also be applied to sealing. When sealing a can with a polygonal or circular cross section, increase the stroke of the cut cylinder and set both taping blocks to abut at the left and right center positions of the can in the direction of travel. After forming the bonded piece, it is necessary to retract both taping blocks so as not to hinder the extrusion of the can body.

[0044]

As described above, according to the first aspect of the present invention, the primary and secondary extrusion of the can body is performed, and before and after the extrusion process, the pair of sealing tapes are cut across the transport path of the can body. Adhesion between the adhesive surfaces of the cans, and the simple operation of cutting the adhesive parts to form a bonded piece automatically and continuously ensures reliable sealing of the entire circumference of the overlapping part of the can. This eliminates the need for an operator to carry in and carry out the can body, thereby saving labor. Moreover, since the ear-shaped bonding pieces are formed at both ends of the pair of sealing tapes, the peeling position of the sealing tapes can be reliably grasped.

According to the second aspect of the present invention, the container sealing device for the can body is configured to convey the carried can body by a conveying device, an elevating frame composed of a pair of vertically movable elevators, and an elevating and lowering frame for raising and lowering the elevating frame. A simple sticking device consisting of a pair of sticking mechanism that has a taping block that cuts the sticking tape, and pulls out the device and a pair of sealing tapes across the conveying path of the can until they stick their sticking surfaces together. With such a structure, it can be manufactured at low cost, and its handling becomes easy.

[Brief description of drawings]

FIG. 1 is a front view of a sealing machine of the present invention.

FIG. 2 is a plan view of the sealing machine of the present invention.

FIG. 3 is a front view showing a transfer device in the sealing machine of FIG.

FIG. 4 is a plan view showing a main part of the transport device of FIG.

FIG. 5 is a plan view showing a sticking device in the sealing machine of the present invention.

FIG. 6 is a side view showing a part of the pasting device of FIG.

FIG. 7 is an explanatory view showing a process of sealing the can body by the sealing machine of the present invention.

FIG. 8 is an explanatory view showing a process of sealing a can body by the sealing machine of the present invention.

FIG. 9 is an explanatory view showing a process of sealing a can body by the sealing machine of the present invention.

FIG. 10 is an explanatory view showing a process of sealing the can body by the sealing machine of the present invention.

FIG. 11 is an explanatory view showing a process of sealing the can body by the sealing machine of the present invention.

FIG. 12 is an explanatory view showing a process of sealing a can body by the sealing machine of the present invention.

FIG. 13 is an explanatory view showing a process of sealing the can body by the sealing machine of the present invention.

FIG. 14 is an explanatory view showing a process of sealing the can body by the sealing machine of the present invention.

FIG. 15 is a perspective view of a can body sealed with a sealing tape by the sealing machine of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealing machine 2 Frame 3 Conveying device 4 Lifting device 5 Lifting frame 5A, 5B Lifting platform 6 Sticking device 61 Sticking mechanism K Can body T Sealing tape R Sealing tape roll body

Claims (2)

[Claims] 1. At least one of a pair of sealing tapes arranged so that their adhesive surfaces face the polymerized portion of the can body is drawn out across the conveying path of the can body, and the adhesive surfaces are adhered to each other. After cutting the adhesive part to form a pasting piece on the front and back, and then extruding the can body to adhere the front side of the overlapping part to the sealing tape and then opening the conveying path of the can body. While pushing out the can body to its stop position with, pull out a pair of sealing tapes and stick to both sides of the overlapped part of the can body after the part that was adhered during the primary extrusion of the can body. Push out the can body that has been completely sealed by the sealing tape, and then pull out at least one of the pair of sealing tapes again across the transport path of the can body, and attach the sealing tape to the rear surface side of the overlapping part of the can body. A method for sealing a can body, which comprises attaching and adhering those adhesive surfaces to each other, and then cutting the adhesive portion to form a pasting piece before and after. 2. A transporting device comprising at least a feeding device for pushing the carried-in can body along a transporting path and a stopper for preventing movement of the can body, and a transporting path for the can body in the transporting device, and the transporting device is disposed respectively. And a pair of affixing mechanisms, each of which is provided with a pair of lifting frames on which the sealing tape rolls are rotatably supported, and each of the lifting frames of the lifting frames, and a taping block at the tip. And a lifting device for moving a pair of lifts of the lift frame up and down with respect to the carrier device. The taping block of each sticking mechanism has a sealing tape on each lift up to its tip surface. The sealing tape of the roll body is pulled out with its adhesive surfaces facing each other, and at least one taping block is It is configured to be able to move back and forth between a feeding position facing the conveying path of the can body and a position in contact with the other taping block, and one taping block is provided with a cutter blade that can move back and forth, and at least one taping block. By advancing from the feeding position facing the transport path of the can body until it touches the other taping block across the transport path of the can body, so that the adhesive surfaces of the pair of sealing tapes adhere to each other and further the cutter blade advances. By doing so, the sticking portion is cut to form a pasting piece before and after, and a can body sealing machine.