JP2006069598A - Bag mouth processor in vacuum packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for making films into a cylindrical shape around an article to be packaged and transferring a packaged article to a vacuum packaging mechanism, which means can transfer the packaged article to a vacuum chamber without forming a wrinkle on bag mouths on both sides of the packaged article. <P>SOLUTION: Around a block of meat 11, two strips of upper and lower films 15, 16 are welded together by a seal bar 14 into a cylindrical shape, and the bag mouths 17 on both sides of the cylindrical shape is guided to a seal stand 28 of the vacuum packaging mechanism via a climbing slide plate 51. This process has a high possibility that a wrinkle is formed on the bag mouths 17 due to a resulting friction as the bag mouths 17 climb up the slope of the plate 51. A finger bar 54, however, pulls the bag mouths 17 aggressively during the climbing to stretch them out. Meanwhile, a bridge plate 53 is arranged to be covered with the slide plate 51 in an area where the vacuum chamber (no drawing) is lowered toward a surface plate 21, and the bridge plate 53 is pushed out so as to guide the bag mouths 17 to the seal stand 28 without trouble. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention conveys a block meat sandwiched between two upper and lower films along a straight track integrally with the two films, and heat-sealing the palm edges of the two films on the front and rear sides of the block meat. The present invention also relates to a processing apparatus for the bag mouths on both sides of the packaging body from a cylinder making device for forming the film to a sealing stand in a vacuum packaging chamber disposed in a rear area of the cylinder making device.

  In Patent Document 1 below, a strip-shaped upper film is fed out from the upper region of the straight conveying trajectory of the block meat, and a strip-shaped lower film is fed out from the lower region of the trajectory to weld the joint edge of the leading ends of the two films. A cylinder making device that pushes block meat into the joined portions and covers the both films on the same meat, and then welds both films on the back side of the block meat to form a tube, and a rear area of the tube making device And a vacuum packaging chamber comprising the bag mouth processing apparatus.

  In a vacuum packaging machine, it is important to seal the bag mouth without any problems in terms of airtightness, and the bag mouth processing means that the bag mouth is transported onto the sealing table in the chamber without any gaps, and this is supplemented. Therefore, the said patent document 1 discloses the tension means of the bag mouth by an air injection pressure, and the means mounted in a strip | belt-shaped belt and carrying a bag mouth to a seal stand.

  However, the means for applying the air injection pressure to the connecting portion of both films by the nozzle kept the tension by the air injection pressure being cut off at the moment when the pair of upper and lower seal bars abutted and cut off the air injection passage. There is a problem that the bag mouth is deflated. On the other hand, the means for carrying the bag mouth to the sealing table by the belt-like belt has the belt-like belt and the package carrying belt in a narrow area across the sealing table. Two steps that face each other and the surface of the platen that supports the seal stand are generated in a relatively narrow area, so that air leakage cannot be prevented even with the elasticity of the rubber sealing material provided at the chamber opening edge. There is a problem.

Japanese Utility Model Publication No. 58-151504

  The problem to be solved is to maintain the tension of the bag mouth and to reduce the number of steps between the surface plate on which the package is placed in the chamber and the package carry-in bell that causes air leakage, Furthermore, the slide plate along the conveyance path of the bag mouth is arranged without interruption.

While forming a package by cross-sealing the upper and lower belt-shaped films fed out in the longitudinal direction with a pair of upper and lower cylinder-forming seal bars at approximately the midpoint of the carry-in conveyor before and after the block meat between them, In the rear area of the carry-in conveyor, a transportation belt is slidably disposed on the upper surface of a flat surface plate, and a pair of sealing stands are installed in parallel on the surface plate on both sides of the transportation belt. In a vacuum packaging machine with a vacuum chamber in the upper area,
An uphill slide plate facing the upper surface of the seal table is disposed on both sides of the carry-in conveyor in the region between the front cylinder-made seal bar and the rear seal plate, and the lower side of the uphill slide plate A bridge plate arranged over the upper surface of the seal stand is installed by slidably supporting a guide rod connected to the bridge plate on a support block, while one end of a bell crank pivotally supported on the machine base frame is engaged with the guide rod. A mechanism that pushes the bridge plate under the climbing slide plate by rotation of the bell crank that transmits the downward movement of the vacuum chamber, and returns the bridge plate to the original state by the upward movement of the vacuum chamber;
A pair of finger bars that reciprocate in response to the vertical movement of the vacuum chamber are formed on a guide rail arranged in parallel with the climbing slide plate by a mechanism that adds and supports a block motion.

When the pair of finger bars move forward, the pair of finger bars protrude from each other into the film and the bag mouths on both sides are stretched forward, and are carried along the climbing slide plate and returned to the original state via the block motion trajectory.
On the other hand, due to the presence of the bridge plate over the upper surface of the climbing slide plate and the seal stand, the bag mouth is smoothly carried onto the seal stand, and then the chamber is prevented from hindering the lowering of the chamber. The bridge board retreats by the descent movement. As a result, there is no need to install the bag mouth carrying belt, and accordingly, the total number of steps between the vacuum chamber and the bag mouth carrying belt is reduced, and the airtightness of the chamber is improved.

  FIG. 2 showing the simplification of the apparatus shows that the carry-in conveyor 10 for the block meat 11 and the transport belt 20 for the package 12 are arranged on a straight track, and the upper and lower seal bars 13, 14 of the carry-in conveyor 10. The above-mentioned packaging having the bag mouths 17 on both sides by welding the upper belt-like upper film 15 covering the block meat 11 and the lower belt-like film 16 in the lower region before and after the block meat. This is a cylinder making mechanism for forming the body 12 at a predetermined interval.

  FIG. 3 is a front view of the mechanism that operates both the seal bars. The frame member 72 supported by each of the pair of lifting rods 71 supported on the sleeve 70 of the machine base frame 32 via the air bag 73 is shown in FIG. While supporting the upper seal bar 13, both ends of the lower seal bar 14 are supported by connecting rods 75. As shown in FIG. 4, the film pressers 76 arranged on both sides of the upper seal bar 13 use the expansion pressure of the air bag 73 while pressing the films 15 and 16 with the spring 77 whose reaction force is strengthened when the frame member 72 is lowered. Then, after the film is welded around the block meat 11 by the seal bars 13 and 14 to form a cylinder, the film is cut by a cutter 79 operated by a cylinder 78.

  Further, in the rear area of FIG. 2, a surface plate 21 is disposed so as to support the lower surface of the transport belt 20, and a plurality of sets of guide rolls 24 are provided on both side edges of the bar 23 depending from the vacuum chamber 22 in the upper area of the surface plate 21. The chamber 22 moves up and down by the rotational power of the driving gear 26 engaged with the rack teeth 25 fixed to the bar.

  FIG. 5 is a front view showing a substantially half region of the entire vacuum packaging mechanism. The transport belt 20 supported on the pulley 27 slides on the upper surface of the surface plate 21 already described, and the surface plate on both sides of the belt 20. The bag mouths 17 on both sides of the packaging body 12 are brought into the upper area of the seal base 28 provided in the area 21, and the pressure inside the descending vacuum chamber 22 is dropped each time. The bag mouth 17 is pressed in a vacuum environment by being pressed against the sealing base 28.

  6 is a front view of the entire apparatus, and FIG. 7 is a side view of the apparatus. Both the upper and lower films 15 and 16 described above are supported on a machine frame 32. In particular, the upper film 15 has its core shaft. Since both ends of 33 are supported by a pair of arms 35 which are pivotally supported via a drive shaft 34, the arm 35 is rotated to the upper and lower limit positions by the motor power of the drive shaft 34 to replenish a heavy film. There is an advantage that work can be performed at a low position. In this case, the current switches installed in the upper and lower stoppers 37 and 38 perform motor control of the drive shaft.

  In FIG. 2, the numerical value of the time required for air removal in the vacuum chamber 22 is substantially constant. Therefore, the vacuum chamber 22 moves up and down according to the cycle set by the timer, and the carry-in conveyor 10 and the conveyor belt 20 are intermittently moved by the control signal. Moving. In this case, when the lower film 16 receiving the weight of the block meat 11 in FIG. 8 is moved by the rotation of the carry-in conveyor 10, the film 16 is sent out while pulling up the heavy load type dancer roller 40, and immediately after the conveyor 10 stops. The driving shaft 41 feeds out the film 16 by the rotation of the roll 42 and repeats the motion for returning the dancer roll 40 to the original position.

  In accordance with the movement of the driving shaft 41 rotating the roll 42 and pulling out the film 16 by the weight of the dancer roller 40, the heat-printing type printer 45 using the ink ribbon matches the lowering speed of the film 16. A few steps are printed in a row.

  In addition, since the block meat 11 is lightweight, when it is difficult for the film 16 to advance by an amount proportional to the rotation angle of the conveyor 10 due to friction between the film 16 and the roller, the drive shaft 43 rotates the auxiliary roller 44. Subsidizes the transfer of film 16.

  FIG. 1 shows only one area of a slide plate that is removed from the complicated mechanism and is installed along the transport path. The first slide plate 50 is also provided in the front area of the bag-making seal bar 14 and the above-mentioned manufacture. An uphill slide plate 51 for raising the bag mouth 17 to the height of the upper surface of the seal table 28 is disposed between the bag seal bar 14 and the seal table 28, respectively, and both the first and second uphill slide plates 50, A bridge plate 52 is disposed between 51 and a bridge plate 53 is disposed between the climbing slide plate 50 and the seal base 28.

In the previous figure, the finger bar 54 keeps the bag mouth 17 in a tension state, and the overall structure of the bar is as shown in FIG.
That is, one fluid cylinder 55 and two guide rails 56 are fixed to the mold 57 so as to be arranged in parallel with the above-described pair of climbing slide plates 51 on both sides in parallel. At the same time, the fin hugger bar 54 connected to the stroke actuator 59 is installed on the block base 58 slidably supported on the guide rail 56.

  That is, the block base 58 that supports the finger bar 54 reciprocates the guide rail 56 by the fluid cylinder 55, while the finger bar 54 reciprocates in the axial direction by the stroke actuator 59, so that the block base 58 is the same as the block meat 11. When moving in the direction, the finger bar 54 guides the bag mouth 17 in a tension state onto the climbing slide plate 51, and then the finger bar 54 is pulled out from the bag mouth and moves backward so-called block motion is repeated. .

  In FIG. 10, the bridge plate 53 existing below the climbing slide plate 51 is slidable on the block 61 fixed to the machine base frame via the two guide rods 60, and operates the guide rods 60. As a result, a part of the bridge board 53 protrudes to the upper region of the seal table 28, and the bag mouth 17 in the package body can be easily guided to the seal table 28 without any trouble. As shown in

  In other words, one end of an L-shaped bell crank 63 pivotally supported by a machine frame in FIG. 11 with a support pin 62 is connected to the vacuum chamber 22 via a link 64, while an elongated hole 65 at the other end of the bell crank 63 is connected. Is engaged with the pin of the guide rod 60. For this reason, when the vacuum chamber 22 moves downward toward the surface plate 21, the bell crank 63 rotates counterclockwise to retract the bridge plate 53 below the climbing slide plate 51, and the chamber 22 is fixed. This facilitates the close contact with the upper surface of the board 21.

  FIG. 12 is an explanatory view of a mechanism for operating the transfer plate 52 already described in FIG. 1. As is clear from FIG. 13, a guide rod 81 connected to the lower side of the transfer plate 52 is attached to the machine frame. A pin 86 is engaged with the arched slit 85 of the cam lever 84 that pivotally supports the upper end 83 of the machine frame while projecting to the side surface of the elevating rod 71 of the upper frame 72 while being slidably supported by the standing frame member 82. To do.

  That is, as shown in FIG. 3, the pin 86 fixed to the elevating rod 71 for operating the upper frame member 72 via the fastening member 87 is engaged with an arcuate slit formed in the cam lever 84. In FIG. By sliding up and down along the slit 85, the cam lever 85 swings about the pivot shaft 83 as a fulcrum, and this swinging motion is transmitted to the transfer plate 52 via the link 88. On the other hand, when the lower seal bar 14 is lifted, the transfer plate 52 can be retracted in the direction of the arrow 89 while the climbing slide 51 can be guided.

Perspective view of various slide plates Simplified side view of the device Front view of film sealer Illustration of partial side action of the previous figure Partial explanatory diagram of vacuum packaging mechanism Front view of the entire device Side view of previous figure Film sealer side view Plane explanatory diagram of film tension means Explanation perspective view of bridge board operation Side view of previous figure Plane explanatory diagram of the bridge plate operating mechanism Side view of previous figure

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Conveyor for conveyance 12 ... Packing body 13,14 ... Seal bar 15 for bag making ... Upper film 16 ... Lower film 17 ... Bag opening 20 ... Belt for conveyance 21 ... Surface plate 22 ... Vacuum chamber 28 ... Seeds stand 51 ... Uphill Slide plate 52 ... passing plate 53 ... bridge plate 54 ... finger bar 56 ... guide rail 60 ... guide rod 61 ... support block 63 ... bell crank 81 ... guide rod 82 ... support block 85 ... cam lever 88 ... link

Claims (2)

While forming a package by cross-sealing the upper and lower belt-shaped films fed out in the longitudinal direction with a pair of upper and lower cylinder-forming seal bars at approximately the midpoint of the carry-in conveyor before and after the block meat between them, In the rear area of the carry-in conveyor, a transportation belt is slidably disposed on the upper surface of a flat surface plate, and a pair of sealing stands are installed in parallel on the surface plate on both sides of the transportation belt. A vacuum packaging machine with a vacuum chamber in the upper region,
An uphill slide plate facing the upper surface of the seal table is disposed on both sides of the carry-in conveyor in the region between the front cylinder-made seal bar and the rear seal plate, and the lower side of the uphill slide plate A bridge plate arranged over the upper surface of the seal stand is installed by slidably supporting a guide rod connected to the bridge plate on a support block, while one end of a bell crank pivotally supported on the machine base frame is engaged with the guide rod. A mechanism that pushes the bridge plate under the climbing slide plate by rotation of the bell crank that transmits the downward movement of the vacuum chamber, and returns the bridge plate to the original state by the upward movement of the vacuum chamber;
An apparatus comprising a guide rail arranged in parallel to the climbing slide plate and a mechanism for supporting a pair of finger bars that reciprocate in accordance with the vertical movement of the vacuum chamber by adding a block motion. On both sides of the carry-in conveyor, a guide plate that covers the upper surface of the lower cylinder-made seal bar and covers a part of the climbing slide plate is supported on the support block in a slidable manner. The movement of the cam lever that is swung by the vertical movement of the cylinder sealing bar is transmitted to the transfer plate via the link and the guide bar, and the upper and lower cylinder sealing bars approach each other. The apparatus according to claim 1, wherein the transfer plate is retracted from a movement region of the cylinder-making seal bar by movement.