JP2004067166A - Packaging sheet closure structure of packaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging apparatus for sealing a part to be packaged of a packaging sheet for wrapping an object to be packaged by welding, which can make a package including a vent hole for causing the inside of the package to communicate with its outside and having an excess cut off, except the part of the packaging sheet for wrapping the object. <P>SOLUTION: A heater 9 for welding the packaging sheet includes a non-welding part 9b for forming, on the packaging sheet, a non-welded part where the inside of the package communicates with its outside. It also includes a cutter 65 for cutting a part located outside the welded portion of the packaging sheet by the heater 9. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a packaging sheet closing portion structure of a packaging apparatus, and more particularly, to a packaging sheet closing portion structure configured to seal a portion of a packaging sheet, on which an article to be packaged is packaged, by heat welding with a heater.
[0002]
[Prior art]
Conventionally, in the above-described packaging apparatus, the surplus portion other than the portion of the packaging sheet for packaging the article to be packaged is separated from the packaging portion by heating and melting by a heater.
[0003]
[Problems to be solved by the invention]
In the case of vegetables, pre-cooling treatment may be performed using a vegetable vacuum cooling device. At this time, if the package is packaged in a sealed state, air may not escape from the package and the package sheet may be broken. In order to avoid this, it is necessary that the inside of the package has a vent hole communicating with the outside.
For this reason, in the conventional packaging apparatus employing the above-mentioned welding type sealing portion structure, it is necessary to provide ventilation holes in the packaging sheet in advance, which is troublesome, or the packaging sheet having the ventilation holes is required. It was necessary to prepare for this, and the cost was sometimes high.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a packaging sheet closing section of a packaging apparatus that can be sealed by welding with a heater and that can cut and remove an excess sheet portion, but can be packaged in a ventilated state even if a packaging sheet having no ventilation holes is adopted. It is to provide structure.
[0005]
[Means for Solving the Problems]
The configuration, operation and effect of the invention according to claim 1 are as follows.
[0006]
〔Constitution〕
In the packaging sheet closing portion structure of the packaging device according to the present invention, a heater that welds the packaging sheet, and a cutter that cuts a portion of the packaging sheet that is located outside a welding position of the heater by the heater, and the heater And a non-welding portion for forming a welding leak portion in the packaging sheet, in which the inside and the outside of the package communicate with each other.
[0007]
[Action]
The portion of the packaging sheet that covers the object to be packaged is sealed by welding with a heater, and in this sealed portion, a welding leak portion that communicates with the inside and outside of the package for the non-welding action portion of the heater is formed. Things. In this case, even if it is configured to cut and remove the surplus portion of the packaging sheet other than the portion where the object to be packaged is wrapped by heating and melting by a heater, the heating sheet cannot be heated and melted due to the non-welding action portion of the heater. Although an impossible portion is generated, the cutting leakage portion can be cut by a cutter. Also, even if the heating temperature by the heater is set relatively low and the packaging sheet is sealed by the heater but not melted and cut by the heater, the range that can be cut by the cutter is set widely. In this case, a surplus portion of the packaging sheet other than the portion that wraps the article to be packaged can be removed by cutting with a cutter.
As a result, the portion of the packaging sheet that wraps the item to be packaged is sealed off by welding with the heater, and the surplus portion other than the portion that wraps the item to be packaged is cut off from the packaging portion. Can be packed in a state. Furthermore, even if a packaging sheet having no vent hole is adopted, if a pressure difference occurs between the inside and the outside of the package, such as when vacuum pre-cooling is performed, the welding leak portion becomes a vent hole and vents. Can be packed in a state.
〔effect〕
Therefore, it can be packaged in a simple state in which it is closed by welding and the excess sheet is cut and removed, and the packaging sheet is provided with ventilation holes so that the packaging sheet is not easily broken even when precooled in vacuum. In addition, it is not necessary to provide a ventilation hole in advance, or it is not necessary to employ a packaging sheet having the ventilation hole.
[0008]
The configuration, operation and effect of the invention according to claim 2 are as follows.
[0009]
〔Constitution〕
In the configuration according to the first aspect of the present invention, the heater is provided with a notch portion to form the non-welding action portion.
[0010]
[Action]
Since the heater is provided with a notched portion to form a non-welding action portion, a portion that is not heated is securely provided on the packaging sheet, and the sealing process by welding is performed while preventing leakage of formation of ventilation holes. .
[0011]
〔effect〕
Therefore, the packaging can be performed in a state where the ventilation holes are formed without leakage and ventilation can be reliably obtained.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 19, the input port 60 a is provided inside a box-shaped machine frame 63 having a circular input port 60 a at the center of the top plate 60 and a rectangular output port 15 at the center of the side wall 61. , A packaging table 2 having a circular supply port 2 a located directly below the packaging table 2, a packaging processing mechanism 70 as shown in FIG. 7 located below the packaging table 2, and located between the packaging table 2 and the top plate 60. A sheet take-out mechanism 35 having a take-out frame 39 is provided, and a packing sheet accommodating section 71 having a cutting mechanism 34 located at the side of the input port 60a is provided at a lateral end of the machine frame 62, so that packaging is performed. The device is configured.
[0013]
This packaging apparatus is for packaging vegetables such as lettuce and cabbage and fruits such as melon and apple (hereinafter referred to as "packaged items A") in a packaging sheet 1 made of a resin film such as polypropylene or polystyrene. The packaging sheet 1 is artificially dropped from the input port 60a into the supply port 2a provided on the upper side of the packaging sheet 1, and thereafter, the operation is separately performed with both hands on the end of the machine frame 62 on the top plate. By operating the pair of start switches 50 provided in such a manner as to be separated from each other in the horizontal direction of the machine frame, the article to be packaged A is wrapped by the wrapping sheet 1 and comes out from the outlet 15. Specifically, it is configured as follows.
[0014]
As shown in FIG. 5 and FIG. 18, the packaging sheet accommodation portion 71 has a pair of support rollers 33 supported on the upper surface of one end of the packaging table 2 so as to freely rotate around a horizontal axis. The support roller 33 is provided on the upper surface side of the packaging table 2 at both ends thereof with a retaining roller 33a that is freely rotatably supported around a vertical axis of the machine frame, and the cutting mechanism.
[0015]
That is, the packaging sheet 1 wound in a roll is placed and accommodated between the pair of retaining rollers 33a over the pair of support rollers 33. The sheet take-out mechanism 35 pinches the end of the packaging sheet 1 and takes it out of the sheet roll. When the take-out length reaches a predetermined length, the packaging sheet 1 is cut by the cutter 34a of the cutting mechanism 34. One sheet of the packaging sheet 1 is taken out by the sheet take-out mechanism 35.
[0016]
As shown in FIG. 5 and the like, the sheet take-out mechanism 35 includes a support plate 36 attached to each of the fixed guide rails 2b at both ends of the packaging table 2 so as to slide by rollers 36a, and rotates over the pair of support plates 36. A sheet holding claw 38, which is rotatably supported at a plurality of positions in the longitudinal direction of a single support shaft 37, which is freely erected, and swings up and down, and a pair of support plates 36. The take-out frame 39 is provided over the upper ends of the take-out frames 39, and the sheet-holding claws 38 are provided with a holding spring 40 which oscillates and biases the sheet holding claws 38 so that the toe side of the sheet holding abutment contacts the lower surface of the take-out frame 39.
A fan-shaped gear 41 is provided on both ends of the support shaft 37 so as to extend over a fixed arm 37a, and is supported by a support shaft of a roller 36a of one support plate 36 so as to be rotatable integrally therewith. A link 42 is provided over the arm 37a, and an electric motor 43 whose output gear meshes with the sector gear 41 is supported by one support plate 36.
The state shown in FIG. 5A is a state in which the motor 43 is driven to push up the rod 37b to take out each sheet holding claw 38 from the take-out frame 39. As shown in FIG. Conversely, when the rod 37b is pulled down by driving, the sheet holding claws 38 are raised toward the take-out frame 39 by the urging force of the holding spring 40, and hold the end of the packaging sheet 1.
As shown in FIGS. 5A and 5B, one drive shaft 44 is disposed at one end of the packaging table 2, and a pair of drive sprockets 45 are fixed to both ends of the drive shaft 44. , A motor 46 for rotationally driving the drive shaft 44 is provided. One driven shaft 47 is disposed at the opposite end of the packaging table 2, and driven sprockets 48 are fixed at both ends of the driven shaft 47. A chain 49 is wound around the left and right driving sprockets 45 and the driven sprockets 48, and the left and right chains 49 are connected to the left and right support plates 36 of the sheet take-out mechanism 35.
[0017]
Thus, the motor 46 drives the drive sprocket 45 in the normal and reverse directions to rotate the chain 49, so that the sheet take-out mechanism 35 reciprocates along the pair of guide rails 2b, and wraps the machine frame 62. A standby position (FIG. 5 (b)), which is located at an end opposite to the side where the sheet accommodating portion 71 is located, and is open above the supply port 2a so as to supply the articles A to the supply port 2a; A cover position (FIG. 6) which is located above the supply port 2a and covers the supply port 2a below the input port 60a with the take-out frame 39 so as to prevent a hand or the like from entering the supply port 2a. The position of the wrapping sheet end of the sheet roll of the wrapping sheet accommodating section 71 is shifted to the sheet holding position (FIG. 5A) where the end of the wrapping sheet is held by the sheet holding claw 38 and the take-out frame 39.
[0018]
Accordingly, when one sheet of the packaging sheet 1 is taken out from the sheet roll of the packaging sheet accommodating portion 71, the sheet take-out mechanism 35 places the packaging sheet 1 on the upper surface side of the packaging table 2 so as to cover the supply port 2a. . Thus, the article to be packaged A is dropped from the input port 60a into the supply port 2a, and is placed on the packaging sheet 1 installed on the packaging table. Can be supplied to the support base 3.
[0019]
The packaging processing mechanism 70 includes a holding processing unit 70a provided with the support 3 as shown in FIG. 7, a pair of first sheet shifting members 14, a pair of second sheet shifting members 16 as in FIG. A pair of sheet moving arms 30, a pair of heaters 9, and a closing processing unit 70 b equipped with a single cutter 65 are provided.
[0020]
The holding processing unit 70a is configured as shown in FIGS.
That is, the first support member 6 is vertically slidably mounted on a pair of guide rails 5 arranged vertically below the machine frame arranged below the supply port 2 a of the packaging table 2. The support base 3 is supported by the fixed second support member 17 so as to be able to fall sideways around the horizontal axis P1. The support base 3 is configured by bending four sides of a flat plate having a plus shape in a plan view upward, and an elastic material 4 such as sponge or soft rubber is attached to an outer surface thereof. A pair of upper and lower sprockets 7 are arranged beside one guide rail 5, and both ends of a chain 8 wound around the two sprockets 7 are connected to brackets 6 a of the first support member 6. Thus, the support base 3 is moved up and down by rotating the sprocket 7 and the chain 8 by a lifting motor (not shown).
[0021]
A pair of holding arms 18 are swingably supported around a horizontal axis P3 at both left and right ends of the second support member 17, and a horizontally long sponge member 18a is attached to the upper end of the holding arm 18, so that the left and right holding members are held. A spring 19 is provided for urging the arm 18 to swing toward the center support 3. The first support member 6 is provided with an operation arm 21 that is switched by a motor 20 between a vertical position shown in FIG. 7 and a horizontal position shown in FIG. 8. Both ends of the operation arm 21 and the left and right holding arms 18 are provided. The lower end is connected by a link 22.
[0022]
The blocker 70b is configured as shown in FIGS.
That is, a first guide rail 23 made of a round bar and a second guide rail 24 made of a plate are arranged on both sides of the supply port 2a and below the packaging table 2, and on one side of the supply port 2a. The guide plate 12 is fixed. A boss 13a is fixed to one end of the pair of support plates 13, the boss 13a is slidably fitted to the first guide rail 23, and a roller 13b provided on the opposite side of the support plate 13 is connected to the second guide rail. 24. As a result, the pair of support plates 13 are slidably supported in the horizontal direction of the paper of FIG. 2, and the heater 9 having the electric heating element 9a as shown in FIG. 18 is fixed to each of the pair of support plates 13. Have been. The cutter 65 having a serrated edge 65a protruding from the tip of the heater 9 toward the other heater 9 as shown in FIG.
[0023]
As shown in FIGS. 1 and 2, an operation arm 28 a that is rotationally driven by an electric motor 28 is provided, and the bracket 25 fixed to the boss 13 a of one support plate 13 and the operation arm 28 a are linked. They are connected by a rod 26. A balance arm 27 is swingably supported around the longitudinal axis P4 of the fixed portion, and a roller 27a at one end of the balance arm 27 is inserted into a concave portion of the bracket 25, and the other end of the balance arm 27 and the other support. A link rod 29 is connected to the boss 13a of the plate 13.
[0024]
As shown in FIGS. 1, 2 and 4, the plate-like first sheet shift member 14 is slidably supported within a range of a long hole 14a by a roller 13c supported by the support plate 13. A pair of tension springs 32 are attached to the first sheet shifting member 14 and the first sheet shifting member 14. The plate-shaped second sheet shifting member 16 is fixed to a pair of support pins 14b fixed downward to the first sheet shifting member 14.
[0025]
As shown in FIGS. 2 and 4, the pair of sheet shift arms 30 that swings in a direction orthogonal to the sliding direction of the support plate 13 is provided below the support plate 13 opposite to the guide plate 12. . The sheet shifting arm 30 is swingably supported on the lower side of the support plate 13 about the longitudinal axis P2 of the fixed portion, and is provided with a long hole 30a in the shape of a letter, and is provided on the back surface of the support plate 13. A pair of rollers 13d is inserted into the long hole 30a, and a guide plate 10 that supports the sheet shifting arm 30 so as not to face downward is bridged across both rollers 13d.
[0026]
Thus, when the operation arm 28a is rotated by 180 ° as shown in FIGS. 2 and 3, the support plate 13 on the right side of the paper is slid to the left on the paper, and the first and the second support plates 13 are moved together with the support plate 13. The two-sheet shift members 14 and 16 are also slid to the left in the drawing. In conjunction with this operation, the balance arm 27 swings clockwise in the drawing, and the link rod 29 is pulled to the right in the drawing, so that the support plate 13 on the left side of the drawing, the first and second sheet shifting members 14, 16 are drawn. Is slid rightward on the page.
[0027]
As described above, when the support plate 13 on the right side of the paper of FIG. 2 is slid to the left on the paper, a pair of sheet shift arms that are opened up and down on the paper in conjunction with the advance of the rollers 13d of the support plate 13 The swing operation is performed so that the 30s approach each other. When the operation arm 28a is rotated by 180 ° in this manner, the first and second sheet shifting members 14, 16 and the sheet shifting arm 30 narrow down the portion 1a of the packaging sheet 1 located above the article A to be packaged. It is sandwiched. Along with the sandwiching, the pair of heaters 9 heats the upper portion 1a of the packaging sheet 1 while clamping the upper portion 1a at the front ends thereof, thereby welding and sealing the packaging sheet 1. At this time, the edge 65a of the cutter 65 pierces a portion of the packaging sheet 1 that is located slightly outside of the sealing position and cuts off the excess, except for the portion of the packaging sheet 1 other than the portion where the packaged object A is wrapped. Separate minute from packaging.
[0028]
Thereby, the packaging processing mechanism 70 holds the packaged object A dropped from the supply port 2a together with the packaging sheet 1 on the support base 3 of the holding processing unit 70a, and is positioned above the packaged object A of the packaging sheet 1. The portion 1a to be squeezed is narrowed down by the first and second sheet shifting members 14 and 16 of the blocking processing section 70b and the sheet shifting arm 30 and is welded by the heater 9 and cut by the cutter 65, so that the packaging process of the article to be packaged A is performed. At the same time, the packaging sheet 1 is closed and cut.
[0029]
As shown in FIG. 6, contact sensors 55 for detecting the presence of a moving obstacle with respect to the sheet take-out mechanism 35 are provided at both ends of the sheet take-out mechanism 35 in the moving direction of the take-out frame 39. The contact sensor 55 is provided over the entire length in a direction orthogonal to the moving direction of the take-out frame 39. As shown in FIG. 6, a detection switch 56 is provided on the back surface side of the top plate 60 of the machine frame 62, and when the sheet take-out mechanism 35 reaches the cover position covering the supply port 2a, the detection unit of the detection switch 56 takes out. By contacting the detection target portion of the frame 39, the detection switch 56 can detect that the sheet extracting mechanism 35 has reached the cover position. As shown in FIG. 5, an optical sensor 53 is provided in the cutting mechanism 34, and the optical sensor 53 detects a mark printed on the packaging sheet 1, so that the packaging sheet pulled out from the packaging sheet storage unit 71. It is configured to detect that the length of one drawer has become the cutting length. As shown in FIG. 7, an optical sensor 31 including a light emitting device and a light receiving device is provided above the first sheet shift member 14, and the light sensor 31 Is released and the photodetector receives light to detect that the support base 3 has been lowered to a position for closing the packaging sheet 1.
[0030]
As shown in FIG. 6, a microcomputer-based control means 57 associated with the start switch 50, the detection switch 56, and the sensors 31, 53, 55 is provided inside the machine frame 62. 57 automatically operates the sheet take-out mechanism 35, the sheet cutting mechanism 34, and the packaging processing mechanism 70 based on the packaging command from the start switch 50 and the detection results from the detection switch 56 and the sensors 31, 53, 55. It is configured to perform packaging control.
[0031]
That is, as shown in FIG. 15, even after both of the pair of start switches 50 are turned on, if at least one of the pair of contact sensors 55 is turned on, the sheet take-out mechanism 39 and the packaging processing mechanism are turned on. 70 is automatically stopped.
When both of the pair of start switches 50 are turned on and both of the pair of contact sensors 55 are turned off, the packaging control is executed as shown in FIGS.
[0032]
That is, as shown in Step 1, the motor 46 is operated to move the sheet take-out mechanism 35 from the standby position, and as shown in Steps 2 to 4, the motor 20 of the holding processing unit 70a is operated to 7, a pair of holding arms 18 as shown in FIG. 7 are swung toward the article A, and the article A is held on the support 3 by the holding arms 18. The descent operation is started, and the counting of the set time T1 by a timer (not shown) is started. As shown in Steps 5 to 7, when the counting of the set time T1 by the timer ends and the optical sensor 31 of the packaging mechanism 70 detects, the support 3 is stopped at that position. In this case, as shown in FIG. 8, a plurality of rubber plate-shaped auxiliary squeezing members 11 are provided on the back side of the supply port 2 a of the packaging table 2 so as to surround the packaged object A, and the support table 3 is lowered. With the operation, the auxiliary squeezing member 11 squeezes the packaging sheet 1 well. When the support 3 stops at the position shown in FIG. 8 as described above, the pair of holding arms 18 are slightly opened as shown in step 8.
[0033]
Next, as shown in steps 9 and 10, when it is determined that the sheet take-out mechanism 35 has reached the cover position shown in FIG. 6 based on the detection result by the detection switch 56, the motor 46 is stopped and the sheet take-out mechanism 35 is turned off. Hold it in the cover position. Thereafter, as shown in step 11, the motor 28 is driven to operate to slide the pair of support plates 13 toward the support base 3.
[0034]
Before this sliding operation is performed, as shown in FIG. 4, the support plate 13, the heater 9, and the first and second sheet shift members 14, 16 are located at the retracted positions. 32 and the roller 13 c of the support plate 13, the tip of the first sheet shifting member 14 is positioned closer to the support base 3 than the tip of the heater 9, and the second end is positioned closer to the support base 3 than the tip of the first sheet shift member 14. The leading end of the sheet shifting member 16 is located. When the support plate 13 is slid toward the support base 3, the lower second sheet shift member 16 and the sheet shift arm 30 first sandwich the upper portion 1 a of the packaging sheet 1 as shown in FIG. 8. The first and second sheet shift members 14 and 16 are connected to each other by a support pin 14b, and the tip of the first sheet shift member 14 is retracted from the tip of the second sheet shift member 16; When the sheet shifting member 16 stops by sandwiching the upper portion 1a of the packaging sheet 1, the upper first sheet shifting member 14 is slightly separated from the upper portion 1a of the packaging sheet 1 as shown in FIG. The portion 1a is lightly sandwiched. Thereby, the article to be packaged A is wrapped in the packaging sheet 1.
[0035]
Next, the support plate 13 is further slid toward the support base 3 from the state shown in FIG. 9, and the tension spring 32 is extended as shown in FIG. , 16 are strongly pushed to the sandwiching side of the upper portion 1 a of the packaging sheet 1, and the heater 9 fixed to the support plate 13 moves the upper side of the packaging sheet 1 between the first and second sheet shifting members 14, 16. The portion 1a is sandwiched, and the edge 65a of the cutter 65 pierces the sheet upper portion 1a to perform a cutting process.
[0036]
When the upper portion 1a of the packaging sheet 1 is sandwiched between the first and second sheet shifting members 14 and 16 and the sheet shifting arm 30, the packaging sheet 1 is entirely lifted upward as shown in FIG. The package A is also lifted up with the packaging sheet 1 and floats up, so that the package A is tightened by the package sheet 1, and the wrinkles of the packaging sheet 1 are entirely extended, so that beautiful packaging can be expected. . In this case, as described above, the holding arm 18 is slightly opened and the sponge member 18a of the holding arm 18 is separated from the article A and the packaging sheet 1, and the first and second sheet shifting members 14, 16, When the sheet shifting arm 30 is advanced to the sandwiching position, the lifting of the packaging sheet 1 and the packaged object A is not hindered by the sponge member 18a of the holding arm 18, and the sponge member 18a of the holding arm 18 and the packaged object A are not hindered. Is not rubbed, so that the packaged object A is not damaged.
[0037]
As shown in FIG. 9, as shown in FIG. 9, when the packaged object A rises from the support 3 with the sandwiching of the upper portion 1a of the packaging sheet 1, the support 3 is slightly lifted and the packaged product is lifted. A is lightly pressed against the back surfaces of the second sheet shifting member 16 and the sheet shifting arm 30. Next, as shown in step 13, the upper portion 1a of the packaging sheet 1 is heated and welded by the heater 9. (FIG. 10)
[0038]
When the heating by the heater 9 is completed, as shown in step 14, the support plate 13 and the heater 9 are slightly separated from the upper portion 1a of the packaging sheet 1 and then stopped. (FIG. 11) In this case, the tension spring 32 that has been stretched in the state of FIG. 10 only returns to the original state shown in FIG. 11, and the first and second sheet shift members 14 and 16 cause the packaging sheet 1 to move. The state in which the upper portion 1a of the first member is sandwiched is maintained. The state in which the heater 9 is slightly separated from the upper portion 1a of the packaging sheet 1 while the upper portion 1a of the packaging sheet 1 is sandwiched between the first and second sheet shift members 14 and 16 in this manner is the set time T2. During the set time T2, the portion heated by the heater 9 in the upper portion 1a of the packaging sheet 1 is cooled and the welding is sufficient.
[0039]
As shown in step 19, the drawer mechanism 35 stopped at the cover position is moved toward the wrapping sheet accommodating portion 71, and when it reaches the sheet holding position as shown in FIG. Then, the end portion of the packaging sheet 1 is held by the take-out frame 39 of the sheet take-out mechanism 35 and the sheet holding claw 38. In this case, as shown in FIGS. 5A and 5B, the removal plate 52 is fixed to the center of the support shaft 51 extending over the lower portions of the left and right support plates 36 of the sheet take-out mechanism 35. As shown in the figure, the first and second sheet shifting members 14 and 16 sandwich the upper portion 1a of the packaging sheet 1, and the heater 9 is stopped in a state where the heater 9 is slightly separated from the upper portion 1a of the packaging sheet 1 and operated. When the sheet take-out mechanism 35 moves toward the packaging sheet accommodating portion 71 during the time T2, the removing plate 52 of the sheet taking-out mechanism 35 moves along the upper surface of the first sheet shifting member 14, and the removing plate 52 The upper portion 1a of the packaging sheet 1 is removed from the packaged object A and is conveyed to the cutting mechanism 34. In this case, since the upper and lower portions of the welded portion of the packaging sheet 1 are sandwiched and held by the first and second sheet shifting members 14 and 16, even if the upper portion 1a of the packaging sheet 1 is removed as described above. The weld is not broken.
[0040]
When the set time T2 in step S14 has elapsed, as shown in step 15, the support plate 13 and the heater 9, and the first and second sheet shift members 14 and 16 are slid to the retracted position shown in FIG. Next, as shown in steps 16 and 17, the holding arm 18 is opened rightward and leftward to the original position, and the support base 3 is further lowered so as to be laid down. Thereby, the article to be packaged A is discharged to the outlet 15. The packaging of one packaged object A is completed as described above, and thereafter, as shown in step 18, the support base 3 is again raised to the original position shown in FIG.
[0041]
While the post-processing of the packaged object A is being performed in steps 14 to 18 above, as shown in step 19, the sheet take-out mechanism 35 is moved from the cover position shown in FIG. 6 to the sheet shown in FIG. The rolled packaging sheet 1 is moved to the clamping position to clamp the end of the roll-shaped packaging sheet 1, and thereafter, as shown in step 20, the sheet take-out mechanism 35 is moved again to the standby position, and the operation of pulling out the packaging sheet 1 is performed. Let it start.
[0042]
When the sheet take-out mechanism 35 reaches the sheet holding position and holds the end of the roll-shaped packaging sheet 1, the lower end of the upper portion 1 a of the packaging sheet 1 on the removing plate 52 of the sheet take-out mechanism 35 is moved to the first position. When the sheet take-out mechanism 35 is moved from the sheet nipping position to the standby position, the sheet is taken out from the upper portion 1a of the packaging sheet 1 by the removal plate 52 of the sheet take-out mechanism 35, and the package The upper portion 1a of the sheet 1 falls downward from the end of the first sheet shifting member 14.
[0043]
As shown in steps 21 and 22, when the sheet take-out mechanism 35 pulls out the packaging sheet 1 from the packaging sheet storage unit 71 by a predetermined length, the mark printed on the packaging sheet 1 is also pulled out, and the optical sensor 53 detects the mark. Upon detection, based on the detection result from the optical sensor 53, the sheet take-out mechanism 35 is temporarily stopped, and in this state, the cutting mechanism 34 is operated to cut the packaging sheet 1.
[0044]
When the packaging sheet 1 is cut to the predetermined length as described above, the sheet take-out mechanism 35 is moved to the standby position again, and the packaging sheet 1 cut to the predetermined length is also moved. When the sheet take-out mechanism 35 reaches the standby position, as shown in step 23, the center of the packaging sheet 1 cut to a predetermined length as shown in FIG. The mechanism 35 is stopped at this standby position, and the holding of the packaging sheet 1 by the take-out frame 39 of the sheet take-out mechanism 35 and the sheet holding claw 38 is released. Thus, one package sheet 1 cut to a predetermined length is placed on the supply port 2a of the packaging table 2.
[0045]
Accordingly, when executing the packaging control for automatically operating the packaging processing mechanism 70 and the sheet ejection mechanism 35 based on the packaging command from the pair of start switches 50, the control means 57 first moves the sheet ejection mechanism 35 to the standby position. To the cover position covering the upper part of the supply port 2a, and thereafter, the first and second sheet shifting members 14, 16 of the packaging processing mechanism 70, the sheet shifting arm 30, the heater 9, and the cutter 65 are respectively moved to the packaged object. A is moved to the position A, and the packaging of the packaged object A and the closing and cutting of the packaging sheet 1 are performed. The packaging processing of the packaged object A by the packaging processing mechanism 70 and the closing of the packaging sheet 1 are performed. When the cutting process is performed, the supply port 2a is taken out from the supply port 2a so as to prevent the hand from entering the packaging processing mechanism 70 while being covered with the take-out frame 39.
[0046]
As shown in FIGS. 17 and 18, a notch is provided at one end of the pair of heaters 9 to form a non-welding action portion 9 b, and the pair of heaters 9 When the portion 1a located above the article to be packaged A is sandwiched and heated and welded, the non-welding action portion 9a does not act on the upper portion 1a of the packaging sheet 1 and the inside and outside of the package communicate with each other. It is configured to form a leak.
The temperature at which the pair of heaters 9 heat the packaging sheet 1 is set to a temperature at which the packaging sheet 1 is not melted and cut even when the packaging sheet 1 is welded, and the first and second sheet shifting members 14 are provided to the carter 65. , 16, and a sheet range gathered by the sheet gathering arm 30 is provided with a cutting range in which the entire sheet can be cut.
[0047]
Accordingly, when the packaging processing mechanism 70 performs the packaging processing of the packaged object A, the portion of the packaging sheet 1 where the packaged object A is packaged is sealed by heat welding by the heater 9, and this sealing is performed. The portion is subjected to packaging processing in a state where a welding leak portion serving as a ventilation hole is formed for the non-welding action portion 9 a of the heater 9, and an excess portion other than the portion packaging the article A is cut by the cutter 65. Removed by
[0048]
[Another embodiment]
As in the above-described embodiment, in addition to providing the non-welding action portion 9a only on one of the heaters 9, any of the pair of heaters 9 may be provided with the non-welding action portion 9a.
[0049]
As in the above-described embodiment, the heater 9 is provided with a notch to form the non-welding portion 9a, and also has a pinching effect on the packaging sheet 1, but has a lower temperature than a portion where the packaging sheet 1 is heated and welded. The non-welding action portion 9a may be formed by providing a portion that does not rise.
[Brief description of the drawings]
FIG. 1 is a perspective view of a sealing section of a packaging mechanism.
FIG. 2 is a plan view showing a driving structure of first and second sheet shift members, a shift arm, and a heater.
FIG. 3 is a plan view showing a state in which first and second sheet shifting members, a shifting arm, and a heater are moved to a sandwiching position;
FIG. 4 is a longitudinal sectional view showing a driving structure of first and second sheet shift members, a shift arm, and a heater.
FIG. 5 is a vertical sectional view of a sheet take-out mechanism.
FIG. 6 is an explanatory diagram showing a cover position of the sheet take-out mechanism.
FIG. 7 is a side view of a holding processing unit of the packaging processing mechanism.
FIG. 8 is a side view of the support base in a lowered position.
FIG. 9 is an explanatory diagram showing a state in which a packing sheet is shifted in a sealing processing unit.
FIG. 10 is an explanatory diagram showing a state of sealing and cutting a packaging sheet in a sealing processing unit.
FIG. 11 is an explanatory view showing a procedure for removing excess packaging sheet.
FIG. 12 is an explanatory diagram showing standby positions of first and second sheet shift members.
FIG. 13 is a flowchart of packaging control.
FIG. 14 is a flowchart of packaging control.
FIG. 15 is a flowchart of packaging control.
FIG. 16 is a block diagram.
FIG. 17 is a plan view of a heater and a cutter.
FIG. 18 is a perspective view of a heater and a cutter.
FIG. 19 is a perspective view of the entire packaging device.
[Explanation of symbols]
1 Packaging sheet
9 heater
9b Non-welding action part
65 cutter

Claims (2)

A heater that welds the packaging sheet, and a cutter that cuts a portion of the packaging sheet that is located outside the welding location by the heater is provided. A packaging sheet closing structure of a packaging device having a non-welding action portion to be formed. The packaging sheet closing part structure of the packaging device according to claim 1, wherein the heater is provided with a cutout part to form the non-welding action part.

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