JP3405424B2 - Vacuum packaging equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention combines a bag-making filling and packaging machine and a rotary vacuum packaging machine to store an article to be packaged in the bag and to seal the bag in a vacuum environment. The present invention relates to a vacuum packaging device that performs consistently.

[0002]

2. Description of the Related Art Known examples as described above (Japanese Patent Laid-Open No. 2-180)
131) is a bag-making filling and packaging machine, which covers a packaged object which is conveyed at equal intervals in tandem with a strip-shaped film which moves in the same direction as the packaged object, and the strip-shaped film is wrapped around the packaged object. Then, the product to be packaged 1 and the tube film 2 formed as described above are rolled into a tubular shape with
While carrying the belt conveyor 3 in the direction of arrow 4, the tube film 2 is cut and sealed at equal intervals by a pair of upper and lower sealers 5 and 6 which rotate at a constant cycle, and one end 7
The bag 8 having only the opening is formed, and the bag containing the objects to be packaged is transferred from the carry-out conveyor 9 onto the surface plate 10 forming a part of the vacuum chamber.

The platen 10 moves in a circular orbit in the direction of arrow 11 and a reverse bowl-shaped lid member is placed on the platen 10 to create a vacuum environment while the platen 10 is in the bag 8. Block the opening.

A pulse signal 15 transmitted from an encoder 14 connected to a rotating power motor 13 of a surface plate 10 is input to a controller 16 and an output signal 17 from the controller rotates a power motor 18 of a sealer. Are controlled so that the movement pitch of each surface plate 10 and the rotation cycle of the sealer 5 coincide with each other. Therefore, the bag 8 accommodating the article to be packaged 1 can be reliably transferred onto the moving surface plate 10 without displacement.

[0005]

However, the above-mentioned apparatus is suitable for vacuum-packing a regular-shaped object to be packaged, and if there is a difference in length between the objects to be packaged 1, it has a correction means. Therefore, the article to be packaged 1 must be accommodated in the bag 8 in a relatively rough state. Therefore, as shown in FIG. 8, the blank portion 19a of the bag formed between the article to be packaged 1 and the seal portions 19 in front of and behind the article to be packaged becomes larger as the article to be packaged having a smaller length becomes aesthetic. Is causing the decrease.

[0006]

According to the present invention, a horizontal endless track is rotated at an equal pitch in order to reduce the head space in a bag that wraps a packaged article regardless of the change in the length of the packaged article as much as possible. A first encoder 92 for calculating the rotation angle of a large number of surface plates 89, and an output pulse of the first encoder 92 is sent to a second motor 55 via a first synchronizing means 96 to rotate the cam 62 connected to the motor. A means for reciprocating the sealer support frame 29 in a horizontal straight line trajectory by a movement of a lever 66 that swings following the shape of the cam 62 in synchronism with the rotation of the surface plate 89, and a reciprocating movement and timing of the sealer support frame. A means for moving a pair of upper and lower seal cut bars 52 and 53 supported by the frame in a relative box motion orbit, and a system for reciprocating the horizontal linear orbit. In a tube film 28 to move in the forward movement direction of the La support frame, means for transferring the respective packaged articles 27 at equal intervals based on the front end, the conveyance direction of the tube film, the sealer support frame 2
A conveyance pitch for determining the positional deviation between the correction conveyor 86 provided subsequent to the rearward fast-feeding conveyor 79 and the back end of the packaged goods in the bag on the correction conveyor by the first sensor 103 and determining the positional deviation from the surface plate 89. The correction conveyor 8 is detected by the detecting means 112 and the command signal from the conveying means detecting means 112.
The seal base 107 in which the rear end of the article to be packaged on 6 is provided on the surface plate
In this case, means 113 for adjusting the speed of the correction conveyor so that the transfer is carried out at the same time.

[0007]

Since the first encoder changes the rotation angle of the surface plate which circulates in the horizontal endless track at an equal pitch into a pulse signal, and the second motor is synchronized based on this pulse signal, the cam rotated by the second motor eventually. And a lever swinging according to the shape of the cam, and a frame reciprocating by the swinging movement of the lever are synchronized with the movement of the surface plate,
The sealer support frame reciprocates once for one pitch of the surface plate.

Further, the conveyor inserts the articles to be packaged into the tube film conveyed toward the frame at an equal pitch with reference to the front end thereof, and cuts and seals the chew film at the front end of each article to be packaged. .

As described above, the rear end of each package to be packaged by the seal cut bar and transferred to the subsequent correction conveyor is detected by the first sensor, and the conveying pitch detecting means for connecting the first sensor is the target. The adjusting means is adapted to match the shift between the package and the surface plate so that the rear end of each packaged product is transferred along with the seal table provided on the surface plate. Adjust the speed of.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in FIG.
The band-shaped film 23 unwound from the roll film 22 is fed to the tube-making means 24 by the feeding roll 21 rotated by the driving force of the motor 57, and the band-shaped film 23 is rolled into a tubular shape by the tube-making means, and the palm portions on both side edges of the film are rolled. Are continuously welded by the center sealer 25. Meanwhile the fourth
The chain conveyor 26 rotated by the motor 56 includes attachments 96 at equal intervals in the endless chain,
The front end of the article to be packaged 27 is pressed against the attachment 96 to be transported. That is, as shown in FIG.
A large number of rollers 121 are rotatably supported between them, and each of these rolls 121 is rotated in the direction of movement of the chain, whereby the object to be packaged 27 is pressed against the attachment 96 and moves integrally with the chain 26. As shown in FIG. 1, the rotation of the rolls 121 does not move the lower surface of each roll.
This can be done by contacting the upper surface of the.

A frame 29 is supported on a guide rail 20 parallel to the transportation path of the tube film 28, and the machine base 6
The output shaft 61 of the second motor 55 fixed to 0 and the shaft 63 of the cam 62, which is also supported by the machine base 60, are connected via a chain 64, and the main body pivotally supported on the machine base 60 via pins 65. A pin 67 of the lever 66 is engaged with an endless groove 68 formed on the surface of the cam 62, and a sub lever 70 having one end engaged with the frame 29 and the main lever 66 are connected by a connecting rod 71. Then, when the cam 62 is rotated by the power of the second motor 55, the lead of the cam groove 68 causes the main lever 66 and the sufflever 70 to swing about the pins 65 and 72 at the lower ends, respectively, so that the frame 29 moves to the guide rail 20. Along the tube film 2
Reciprocates at the same speed as 8.

The frame 29 is specifically shown from the front as shown in FIG. In addition to vertically supporting the columnar guide 31 on the upper surfaces of the two blocks 30 arranged to be supported by the two horizontal guide rails 20 described above,
Both ends of upper and lower two frame members 32 and 33 are slidably supported by these columnar guides through sleeves 34 and 35.
Further, side plates 37 fixed to the outer surfaces of both blocks 30 with screws 36 are erected in parallel with the columnar guides 31, and the upper ends of the two columnar guides 31 and the two side plates 37 are integrated by a top plate 38. To form a portal frame 29. Also, the lateral holes 39 formed in the blocks 30 on both sides
In addition, a shaft 41 is rotatably supported via a bearing 40, and bell cranks 42 are provided at both ends of the shaft 41, respectively.
The bell cranks at both ends and the upper and lower erection members 32,
Both ends of 33 are connected via links 43 and 44 (see FIG. 1 for such structure). Therefore, if the bell crank 42 is alternately inverted in the forward and reverse directions integrally with the shaft 41,
Along with this, the upper and lower bridge members 32, 33 approach and separate from each other. In this case, the frame members 32 and 33 fitted in the vertically long slits 45 formed on both side plates without slack move up and down along the slits 45.

Further, a base 46 installed between both blocks
A fifth servomotor 47 equipped with a speed reducer is installed on the above, and a pinion 48 provided on the shaft of the fifth motor and a gear 48 fixed to the shaft 41 are engaged to drive the fifth motor 47. As a power source, the shaft 41 is configured to be inverted. When the seal bar 52 fixed to the piston rod 51 of the air cylinder 50 on the upper surface of the upper bridge member 32 collides with the seal bar 53 on the upper surface of the lower bridge member 33, the compressed air sent to the air cylinder 50 buffers the tube. Film 15
Is crushed, and the film is cut with a blade housed in the seal bar. In this case, since a part 200 of the seal bar 52 is omitted as shown in FIG. 4, the front end 2 faces in the traveling direction.
01 is sealed, but the trailing end 202 remains open.

In FIG. 1, the frame 29 has a forward direction 74.
When moving to, the upper and lower seal bars 52 and 53 crush the tube film 28 to heat-seal it, and
When 9 moves in the backward direction 75, both seal bars 52, 5
Since 3 is separated, both seal bars 52, 53 eventually perform a box motion action. In this case frame 29
A conveyor belt 77 supporting wheel shafts 76, 78 on
79 is provided with variable tension rolls 80 and 81, respectively, so that the conveyor belt 7 can move in accordance with the reciprocating motion of the frame 29.
Allows expansion and contraction of 7,79.

The conveyor belt 79 at the rear of the frame is slightly faster than the conveyor belt 77 at the front of the frame, and the package 85 separated by the seal bar 52 is separated from the subsequent object to be packaged and transferred to the correction conveyor 86. To do.

As shown in FIG. 5, the correction conveyor 86
Below the disk, the disk 87 rotates counterclockwise by the driving force of the central axis 88 of the disk, and eight surface plates 8 are provided on the periphery of the disk.
Since 9 are provided at equal intervals, each platen 89 circulates below the correction conveyor 86 in a circular path. A first motor 91 transmits power to the shaft 88 via a speed reducer 90, and a first encoder 92 converts the rotation of the shaft 88 into a pulse signal.

As shown in FIG. 6, when the first encoder 92 connected to the first motor 91 inputs a pulse signal to the interface 94 of the computer 93, the drive control device 95 that analyzes and processes this pulse causes the second motor to operate. 55 is controlled so as to rotate synchronously with the first motor 91. That is, each time the surface plate 89 of FIG.
The frame 29 reciprocates once to send out the packages 85 one by one.

The description will be made with reference to the block diagram shown in FIG.
As described above, by sending the output signal of the first encoder 92 connected to the motor 91 to the second motor 55 via the first synchronizing means 96, both the first and second motors 91, 55 rotate synchronously. However, the output of the second encoder 97 of the second motor 55 is sent to the third and fourth motors 57, 56, 47 via the second synchronizing means 98, and the rotations of these motors are synchronized with the first motor 91. Let That is, in FIG. 1, the third motor 57 for feeding the film 23, the fourth motor 56 for driving the chain conveyor 26, and the bell crank 4 are used.
Similarly to the second motor 55, each of the fifth motors 47 for reversing 2 is controlled to rotate in synchronization with the movement pitch of the surface plate 89.

Screw rod 8 provided along the main lever 66
2, a variable block 83 having an internal thread is engaged, and the lower end of the screw rod 82 is connected to the output shaft of the sixth servomotor 58. When the screw rod 82 is rotated by the sixth motor 58 and the variable block 83 is displaced along the main lever 66, the swing width of the sub lever 70 changes, and the movement amount and speed of the frame 29 change proportionally. .

In FIG. 1, the chain conveyor 26 presses the front end of the packaged object 27 against the attachment 96 and inserts it into the tube film 28. Therefore, as shown in FIG. 4, each packaged object 27 has its front end pitch 100. Are the same. Therefore, the upper and lower seal bars 52 and 53 seal the front end surface 101 of the object to be packaged and the seal bar rear end surface 102 with a gap as small as possible.

The first sensor 103 installed in the upper area of the correction conveyor 86 is provided with the package 85 conveyed by the correction conveyor.
Is monitored to detect the rear end of the article 104 to be packaged. As shown in FIG. 6, the first sensor 103 inputs a timing signal for detecting the rear end of the article to be packaged to the computer via the interface 105, and the cyclic pitch of the surface plate 89 in FIG. Figure out the misalignment. Then, the seventh motor 106 is arranged so as to correct the positional deviation between the two.
Adjusts the speed of the correction conveyor 86. Therefore, as shown in FIG. 7, the surface 1 of the seal base 107 provided on the upper surface of the surface plate
08 and the package 85 are transferred onto the surface plate 89 so that there is almost no gap between the rear end surface 109 of the object to be packaged 27.

As shown in FIG. 5, a second sensor 110 is fixedly provided outside the rotation track of the surface plate 89, and the second sensor 110 detects the pitch of the seal base 107 of each surface plate. The first encoder 92 determines the approximate pitch of each surface plate 89, but the pitch of the seal base 107 is not always accurate due to a processing error. Therefore, the second sensor 110 detects the pitch difference of the seal base 107, and As shown in FIG. 9, information obtained from the pitch detecting means 111 of the seal base connecting the second sensor 110 and the conveying pitch detecting means 112 connecting the first sensor 103 is compared by the comparison device 120, and the position of the seal base and The adjusting means 113 controls the speed of the correction conveyor 86 by the seventh motor 106 according to the deviation from the position of the rear end of the package.

While the platen 89 on which the package is placed circulates on the horizontal endless track, as shown in FIG. 7, the lid member 115 supported by the arm 114 covers from above and seals the inside. When the inside of the lid member 115 is changed to a vacuum environment via the hose 116, the seal bar 118 is moved by the air cylinder 117.
Descends toward the seal base 107 and heat seals the opening of the bag. In this case, a cut is formed on the surface of the bag 119 with a knife, and the air inside the bag is sucked through the cut.
Since it is disclosed and publicly known in No. 003, detailed description of the structure is omitted.

[0024]

[Effect] Based on the front end surface of the object to be packaged, the front ends of a large number of objects to be packaged are fed into the tube film at equal intervals, and the tube film is fully cross-sealed at the front end of each object to be packaged. After forming a bag-filled package with one end open,
On the correction conveyor to which the package is transferred, the rear end position of the packaged object inside the package is detected by the first sensor, and the position of the packaged object and the position of the platen to which the packaged object is transferred. Determining the amount of deviation and controlling the speed of the correction conveyor in each case according to the deviation amount, so even if there is a difference in the length of the packaged object, the bag can always be sealed along the rear end surface of the packaged object, This has the effect of forming a vacuum-packaged product that has no extra blank space in the bag.

[Brief description of drawings]

FIG. 1 Side view of the device

FIG. 2 is a front view of the sealing device.

[Figure 3] Plan view of the supply conveyor

FIG. 4 is a side view of the sealing device.

FIG. 5 is a plan view of the vacuum packaging machine.

FIG. 6 is an explanatory diagram of an electronic device.

FIG. 7 is an explanatory diagram of a vacuum chamber

FIG. 8 is an explanatory diagram of a package.

FIG. 9 is an explanatory diagram with a block line

FIG. 10 is an explanatory diagram of a conventional example.

[Explanation of symbols]

23 ... Strip-shaped film 24 ... Cylinder making means 27 ... Packaged object 29 ... Frame 47 ... 5th motor 52, 53 ... Seal bar 55 ... 2nd motor 56 ... 4th motor 57
… Third motor 62… Cam 66… Main lever 85
... Package 86 ... Correction conveyor 89 ... Surface plate 91 ... First motor 97 ... Second encoder 103 ... First sensor 106 ... Seventh motor 110 ... Second sensor

Claims (2)

(57) [Claims] 1. A first encoder 92 for determining the rotation angles of a large number of surface plates 89 that rotate on a horizontal endless track at an equal pitch, and a first synchronizing means 96 for the output pulses of the first encoder 92.
The second rotation of the cam 62 which is connected to the feed motor motor 55 is synchronized with the rotation of the platen 89, more sealer support frame to the motion of the lever 66 which swings along the shape of the cam 62 through the means for reciprocating the 29 horizontal linear track, and means Before moving in a relative box motion trajectory reciprocating motion and a pair of upper and lower seal cutting bars 52 and 53 which is supported by the frame timed the sealer support frame , The sea reciprocating in the horizontal straight line
Means for loading the articles to be packaged 27 at equal intervals based on the front end into the tube film 28 which moves in the forward movement direction of the frame supporting frame, and the rear side of the sealer supporting frame 29 facing the conveying direction of the tube film. Correction conveyor 86 provided subsequent to the high-speed feed conveyor 79 and the rear end of the packaged object in the bag on the correction conveyor is the first sensor 1
The conveyance pitch detecting means 112 for catching the positional deviation with the surface plate 89 and the command signal from the conveying means detecting means 112, and the rear end of the article to be wrapped on the correction conveyor 86 is a seal provided on the surface plate. Means 11 for adjusting the speed of the correction conveyor so that they are transferred in unison with the platform 107
A vacuum packaging device comprising: 2. A seal table feed which is electrically generated from the seal table pitch detecting means by detecting the feed pitch of the seal table on each surface table by means of the seal table pitch detecting means 111 installed on the rotary orbit of each table. The comparison means 120 compares the pitch-equivalent potential and the feed pitch-equivalent potential of the rear end of each package to be detected by the conveyance pitch detection means 112,
The speed of the correction conveyor 86 is adjusted according to the deviation between the feed pitch of the seal base and the feed pitch of the package.
Vacuum packaging device according to.