JPS61142112A - Film hold-down device for packaging in packaging machine - Google Patents

Abstract

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

Description

Detailed Description of the Invention Purpose of the Invention (Industrial Field of Application) The present invention is particularly applicable to a fruit and vegetable packaging machine for packaging flexible trays, in which a belt-shaped packaging film stretched over the packaging section by a conveyance device is used to wrap products. This invention relates to a packaging film holding device that holds both ends of a packaging film in the width direction when wrapping an item by folding the packaging film from the front, back, left and right directions.

(Prior Art) Conventionally, for example, in the packaging machine described in Japanese Patent Application No. 56-189426, the packaging film stretched on the packaging section is clamped by both front and rear pressing members at both edges in the width direction. When the tray on the pedestal device is pushed up to the packaging position, the packaging film is stretched to cover the tray from above, and then the packaging film is folded by the folding device below the tray. The tray is then wrapped.

That is, for example, in the folding device of the packaging machine, the rear folding member moves in the front and rear directions with respect to the fixed front folding member, approaches and separates from each other, and as the rear folding member moves back and forth below the rear folding member, both left and right folds are performed. The folding members open and close each other, and the article mounting table erected on the cradle device can be tilted inward by contact with the rear folding member and both left and right folding members.

Then, when the rear folding member moves forward and the left and right folding members are closed together, these folding members push the packaging film toward the bottom of the tray on the mounting table and push it onto the mounting table. Touch it and tilt it. When the pedestal device moves downward at the same time as this tilting, the tray is sequentially placed on the rear folding member from the rear side of the lower surface, and the packaging film is folded under the tray from both rear and left and right directions. After that, when the tray is conveyed forward by the rotation of the conveyor belt and transferred from the rear folding member to the front folding member, the packaging film hits the front folding member on the underside of the tray during the transfer and is folded from the front as well. The folding from the rear overlaps with the folding from both left and right directions, and the folding from the front overlaps to form a folded portion at the bottom of the tray. Next, the rear folding member retreats, and as the rear folding member retreats, the left and right folding members also open from each other.

(Problems to be Solved by the Invention) However, as described above, when the packaging film is stretched when pushing the tray up to the packaging position or when folding the packaging film, this may cause problems, especially when packaging a flexible tray. for,
This stretching may cause the tray to deform and crush soft items stored within the tray, resulting in a decrease in product value.

Structure of the Invention (Means for Solving the Problems) The present invention has been made in view of this problem, and as shown in the drawings of the embodiments to be described later, a band-shaped packaging film F is placed in a packaging part S.
In a packaging machine equipped with a conveyance device 1 for conveying the product to a packaging section S, and a folding device 76 for packaging the product W by folding the packaging film F stretched on the packaging section S into the product W from the front, back, right, and left directions, Both front and rear press members 26, 37 that hold the packaging film F are disposed in the packaging section S along both widthwise edges of the packaging film F, and both press members 26, 37
The inner edge 6 of at least one pressing surface 64,70 of
4a, 70a have abutting parts 66a, 72a that contact the packaging film F for holding the packaging film F, and gap parts 66b, 72b that do not contact the packaging film F.
It was formed by

(Function) When the gaps 66b and 72b exist, the degree of expansion of the packaging film F decreases near the gaps 66b and 72b, and the expansion of the packaging film F is relaxed.

(Example) Hereinafter, an outline of a packaging machine equipped with a packaging film pressing device according to an example of the present invention will be described with reference to the drawings.

Figures 1 to 6 show the packaging film conveying device 1 installed on the top of the machine frame, and as shown in Figure 2.4.5, two wires are installed from the outside on one side between the front and rear fixed frames 2. A 0-ra shaft 3.4 is rotatably installed, and a shaft 5, a pair of upper and lower shafts 6,
7 and a pair of upper and lower shafts 8.9 are fixed, while a pair of upper and lower shafts 10.11 is fixed to the other side. Reference numeral 12 denotes a pair of opening/closing frames supported rotatably in the vertical direction on both front and rear ends of the shaft 6, extending from the same shaft 6 to above the roller shaft 3, and extending between the tips of the opening/closing frames 12. A support frame 13 having a handle 14 is fixed to the support frame 13 , a pair of roller shafts 15 17 are rotatably installed on the base end side of the support frame 13 , and a shaft 16 is fixed to the support frame 13 . A roller shaft 15a that is movable up and down is installed on the tip side.

In FIG. 5, reference numeral 18 denotes a pair of upper and lower rollers rotatably supported on the front ends of the pair of upper and lower shafts 16°5;
are a pair of upper and lower rollers rotatably supported on the front ends of the pair of upper and lower shafts 6.7, both rollers 18,
Five endless round belts 20 are strung around the rear side between the belts 19 and 19, facing each other vertically. 21 is the pair of upper and lower shafts 10';
A pair of upper and lower rollers rotatably supported on the front end of the roller 11, the upper roller 21 and the upper roller 1.
Three endless round belts 22 are stretched between the front side of the roller 8 and the front side of the lower roller 18 via the upper roller 19, and between the lower roller 21 and the front side of the lower roller 18. Four endless round belts 23 are stretched through the lower O-ra 19, and as shown in FIG. 22 lower running portions 22a are interposed therebetween, and both running portions 22a and 23a are alternately arranged one by one to form seven belt rows M. 24 is a pair of upper and lower rollers rotatably supported on the front ends of the pair of upper and lower shafts 8 and 9; 25 is a pair of upper and lower rollers that are rotatably supported on the fixed frame 2 inside the roller 21; Both upper and lower round belts 22,23 are tensioned by both rollers 24,25. In addition,
The roller shaft 17 also causes the upper round belt 20.
22 is nervous.

Reference numeral 26 denotes a cylindrical front holding member supported vertically movably with respect to the front fixed frame 2, and as shown in FIG. The lower running portion of the circular belt 23 is inserted, and the pressing portions 26a and 26b are interposed between the upper and lower running portions of the round belt 23. Note that this pressing portion 26a.

26b corresponds to the inner five belts of the belt row M. A pressure receiving plate 27 extends from the fixed frame 2 in correspondence with the presser member 26, and is interposed between the upper and lower running portions of the upper round belt 22, as shown in FIG.

Reference numeral 28 denotes a moving frame inserted into the lower shafts 5, 7, 9.11 so as to be movable in the axial direction thereof, and a male threaded rod 29 is screwed into female threaded portions 29a attached to both left and right sides of the moving frame. are combined. Both male threaded rods 29 are supported by the fixed frame 2 and are interlocked with each other by a chain 29b, and a handle 29c is attached to one of the male threaded rods 29 on the outside of the fixed frame 2 on the rear side. The movement of the moving frame 28 can be adjusted. Note that the upper shafts 16.17, 6.8.10 are connected to this moving frame 28.
It is designed to be able to bite into a notch 28a formed on the upper edge of. Reference numeral 30 denotes a pair of upper and lower rollers 31 which are movably and rotatably supported in the axial direction of the pair of upper and lower shafts 16°5 so as to be positioned within the moving frame 28.
32 is a pair of upper and lower rollers similarly supported on the pair of upper and lower shafts 10.11, and these rollers are 30, 31, and 32 are pushed by the moving frame 28 as the moving frame 28 is adjusted, so that they follow the moving frame 28 and move in the axial direction.

33 is the upper O-
Five non-pane-shaped round belts, 34, stretched through la 31
is the lower roller 3 between the lower rollers 30 and 32.
6 endless round belts stretched through 1,
As shown in FIG. 6, the upper running portion 3 of the lower round belt 34
The lower running part 33a of the upper round belt 33 is interposed between the belts 4a, and the running parts 33a and 34a are alternately arranged one by one to form eleven belt rows M.

Reference numeral 35 denotes a pair of upper and lower rollers that are movably and rotatably supported in the axial direction of the pair of upper and lower shafts 8 and 9 so as to be positioned within the movable frame 28.
The two-person belt 3 moves in the axial direction following the adjustment of the movement, and is supported by a pair of upper and lower rollers 36 that are rotatably supported with respect to the moving frame 28 inside the roller 32.
3.34 is tense. Note that the upper round belt 33 is also tensioned by the roller shaft 17.
Reference numeral 38 denotes a cylindrical rear presser member supported vertically movably with respect to the movable frame 28, and 38 is a pressure receiving plate extending from the upper part of the movable frame 28 corresponding to the rear presser member 37. Pressing member 37, pressure receiving plate 38, and upper and lower round belts 33.3
4 is the same as that of the front presser member 26.

As shown in FIG. 5, 39 is a pair of pulleys supported at the rear ends of the roller shafts 3 and 4, and an endless round belt 40 is stretched between both pulleys 39. In FIG. 5, 41 is a gear fixed to both the upper and lower rollers 21;
are gears fixed to both the upper and lower rollers 32 and movable in the axial direction together with the rollers 32, and both gears 41.
The drive rotation of the lower shaft 11 is transmitted to 42, and the rotation is transmitted to each part via rollers 21.32, round belts 22.23.33.34, etc. Reference numeral 43 in FIGS. 2 and 4 indicates a saw blade for forming perforations, which is provided between both roller shafts 3 and 4 on one side of the fixed frame 2.

A case will be described in which the packaging film F is set from one of the pair of upper and lower winding rollers 44 provided on one side of the machine frame in the packaging film conveying device 1 configured as described above. In this case, the position of the moving frame 28 is adjusted in accordance with the width dimension of the packaging film F by operating the handle 29c in advance. Then, as shown in FIGS. 2 and 4, when the handle 14 on the machine base side is grasped and lifted upward, the opening/closing frame 12 rotates upward around the shaft 6, and the upper roller 1
8, 30 and the lower roller 18, 30 are separated, and the film supply port P is opened. From this state, the winding roll 44
The starting end of the packaging film F is led to the supply port P via the two-wheel shafts 3 and 4, and placed on the lower round belt 20.23.34. Next, when the opening/closing frame 12 is returned downward to bring the upper roller 18.30 and the lower roller 18.30 closer together and the film supply port P is closed, both edges in the width direction of the packaging film F are As shown in the figure, the upper round belt 22°23
Lower running parts 22a, 33a and lower round belt 23.3
The running section 23a is the first row from the inside with respect to the belt row M with the upper running sections 23a and 34a of the upper running section 23a and 34a.

Above 34a, below second row running section 22a, 33a, 3
The running portions 23a and 34a of the row are alternately inserted into a meandering state. From this set state, the packaging film F is spread onto the packaging section S by driving the transport device 1.

Next, the packaging film pressing device will be described in detail with reference to FIGS. 1 to 12. As shown in FIG. 5, the aforementioned front pressing member 26 has a central pressing portion 26a and lateral pressing portions 26 on both sides of the central pressing portion 26a.
It is divided into b. That is, as shown in FIG. 9, the lateral pressing parts 26b are integrally connected by a connecting part 26c, and the central pressing part 26a is placed in a recess 26d formed on the upper surface of this connecting part 26c.

9 and 10 show the vertical movement mechanism of the horizontal pressing part 26b, 1
Reference numeral 27 denotes a pair of support rods extending horizontally in the same direction from a fixed shaft 128 supported at both front and rear positions of the front fixed frame 2 and rotatably supported with respect to the same shaft 128. The horizontal pressing part 26b is rotatably attached to the shaft 129.
The distances between the centers of both wheels 128 and 129 are the same. A pair of interlocking rods 130 extend upward from the fixed shaft 128 and are integrated with the support rod 127. A connecting rod 131 is rotatably attached to a shaft 132 between the tip ends of the interlocking rods 130. Distance L between center lines of 128 and 132
2 are the same, and the angle difference θ between the support rod 127 and the interlocking rod 130 with respect to the center line of the fixed shaft 128 is the same. Reference numeral 133 denotes an operating rod that extends horizontally from one of the support rods 127 in the opposite direction around the fixed shaft 128 and is integrated with the support rod 127, and has a solenoid fixed to the machine base at its tip. 134 movable O-rads 134a are rotatably mounted on a shaft 135. A spring 136 is wound around one side of the fixed shaft 128, and normally urges the support rod 127, the interlocking rod 130, and the operating rod 133 in the rotating direction of arrow A. 137 is a stopper bolt screwed into the connecting rod 131.

Then, the solenoid 134 is turned on and the movable rod 13
4a is moved downward, one of the support rods 127 that is linked to the operation rod 133 is rotated about the fixed shaft 128 in the direction of arrow A against the bias of the spring 136, and the support rod 127 The connecting rod 131 is pulled diagonally downward by the interlocking rod 130 that rotates about the same axis 128 as the
This connecting rod 131 causes the other interlocking rod 130 to rotate about the fixed shaft 128 in the direction of arrow A, and the other support rod 127 to rotate about the same axis 128 in the direction of arrow A. When both support rods 127 are simultaneously rotated in the direction of the arrow A, the entire lateral pressing portion 26b is raised on average, and as shown in FIG. It is securely held between the portion 26b and the pressure receiving plate 27. Note that this upward movement of the lateral pressing section 26b is performed at the same time as the upward movement of the central pressing section 26a, which will be described later. On the other hand, solenoid 13
4 is turned off and the movable rod 134a is moved by the spring 136.
When the horizontal pressing portion 26b is moved upward by the urging force of , the entire horizontal pressing portion 26b descends on average. This downward movement position can be adjusted with a stopper bolt 137.

Fig. 6.10 shows the vertical movement mechanism of the central pressing part 26a,
56 is a rotation shaft rotatably supported by a pair of brackets 57 fixed to the lower surface of the pressure receiving plate 27; 58 is a mounting member fixed to one end of the rotation shaft 56;
The central pressing portion 26a is fixed. 59 is an interlocking rod fixed to the other end of the rotation shaft 56, and extends downward. A chain 60 is connected to the lower end of the interlocking rod 59, guided downward via a guide member 61 fixed to the fixed frame 2, and connected to the movable rod 62a of the solenoid 62.

Note that the rotation shaft 56 is biased in the rotation direction of arrow B.

Then, the solenoid 62 is turned on and the movable rod 62a
When is moved downward, the chain 60 is pulled downward and the interlocking rod 59 is rotated in the opposite direction of the arrow B.

As a result of this rotation, the central pressing portion 26a is rotated about the rotation shaft 56 in the opposite direction of the arrow B, and the inner five of the belt rows M are securely moved between the central pressing portion 26a and the pressure receiving plate 27. Being pinched. On the other hand, the solenoid 62 is turned off and the rotation shaft 5
When 6 is rotated in the direction of the arrow 8, the central pressing part 26a is rotated in the direction of the arrow B around the rotation axis 56, and the horizontal pressing part 26 is rotated in the direction of the arrow B.
It is placed again in the recess 26d of brtA.

Further, as shown in FIG. 11.12, the rear presser member 37 also has a central presser portion 37a and a side presser portion 37b, similar to the front presser member 26.
The horizontal pressing portion 37b is integrally connected by a connecting portion 37G, and the central pressing portion 37a is placed in a recess 37d formed on the upper surface of the connecting portion 37C.

However, the central pressing portion 37a of the rear pressing member 37 is operated by a vertical movement mechanism that is slightly different from that of the central pressing portion 26a of the front pressing member 26 described above. That is, as shown in FIGS. 6 and 12, the central pressing part 37a is fixed to one end of a support shaft 67a supported by a pair of brackets 57 via a mounting member 58, and is levered to the other end of this support shaft 67a. A rod 67 is fixed. At the other end of this lever rod 67 is a solenoid 6.
8 movable rods 68a are connected to each other, and the lever lever 67 is biased in the rotating direction of arrow G about its support shaft 67a. Note that the suppressing action of the rear presser member 37 is also similar to that of the front presser member 26.

Center pressing portions 26a, 3 of the front and rear pressing members 26.37
Sponges 26A, 268, 37A, 37B are provided on the 7a and the horizontal pressing portions 26b, 37b, respectively.

is pasted, and its upper surface is used as a pressing surface 64.70. In particular, in the pressing surfaces 64.70 of the central pressing portions 26a, 3, 7a, recesses 65.71 are formed on both left and right sides of the pressing surfaces 64.70, as shown in FIGS. The inner edges 64a, 70a of the pressing surface 64.70 have contact parts 66a, 72a that come into contact with the packaging film F when the packaging film F is sandwiched between the pressure receiving plate 27.38, and the packaging film Gap portion 6611.72 that does not contact F
1) is formed.

Fig. 1.3.4 shows the packaging film folding device 76 installed above the conveying device 1, and the front folding member 89 is fixed, and the folding film folding device 76 is moved forward and backward so as to approach and separate from the front folding member 89. The rear folding member 77 is provided with a rear folding member 77 that is movable in the direction, and left and right folding members 82 that are supported on both left and right sides below the rear folding member 77 so as to be rotatable in the left and right direction.
7 moves back and forth, the left and right folding members 82 are linked to each other so that they can be opened and closed, and these front and rear, left and right folding members 89
, 77.82, each folding part 89.77° 82 approaches each other to form a folding part R in which the packaging film F is folded into the article W on the lower side thereof. This folding section R corresponds to the packaging section S of the conveying device 1, as shown in FIG.

Reference numeral 151 denotes a pair of mounting members supported above the rear folding member 77 so as to be rotatable in the left and right directions corresponding to both the left and right folding members 82, and are normally urged to open each other. As the folding member 77 moves back and forth, the placement member 151 is restricted from opening. 161 is both device members 151
The push-out member is supported above the folding member so as to be movable in the front-rear direction, and is configured to reciprocate from the rear position to the vicinity of the front folding member 89. 104 is a belt conveyor supported above this extrusion member 161 so as to be able to move in parallel in the vertical direction,
is supported.

As shown by the white frame in FIG. 1.2, 46 is a pedestal device that is moved up and down between the inner end of the supply device 45 and the packaging section S and the folding section R, and is biased to be tiltable. The feeding device @45 is equipped with a plurality of mounting tables (not shown) with
The article W is transferred from and placed thereon.

(Refer to Japanese Patent Application No. 58-41304) As shown in Fig. 1.2.5, 171 is the pedestal device 46.
It is a push-up member mounted so as to be vertically movable around the periphery, and is adapted to push up the packaging film F stretched on the packaging section S to the folding section R of the folding device 76. 1
Reference numeral 77 denotes left and right pressing members that move in conjunction with the vertical movement of the push-up member 171, and are adapted to clamp both left and right edges of the packaging film F when the push-up member 171 reaches it. Reference numeral 47 denotes a heater device on which the packaging section made up of the front folding member 89 is placed.

Next, an outline of the actual packaging operation will be explained. When the article W (the tray W1 containing the stored articles) is placed on the supply device 45, the article W is transferred and the pedestal device 46 that has moved downward Now that the push-up member 171 is placed on
is already at the lowest moving position, and the rear folding member 77 is retracted.

When the conveyance device 1 is driven in synchronization with this feeding, the starting end of the packaging film F located at the supply port P is conveyed toward the packaging section S in the center of the conveyance device 1. On the way, the saw blade 43 forms perforations in the width direction at every fixed length of the packaging film F, and an instantaneous brake is applied to the roller shaft 4, so that the packaging film F is clamped by both the upper and lower shafts 15, 4. The packaging film F is pulled, and the tension causes it to be cut at the perforations and conveyed to the packaging section S as shown in FIG.

As shown in FIGS. 7 and 8, the packaging film F on the packaging section S is moved up by the upward movement of the front and rear pressing members 26, 37, so that the pressure receiving plate 27.
It is held between 38 and 38.

When the push-up member 171 is moved upward from this packaging film set state, when the push-up member 171 reaches the packaging film F, the left and right press members 177 also clamp both left and right edges of the packaging film F.

Thereafter, as shown in FIG. 2, the packaging film F is pushed up and stretched by the push-up member 171. In this way, by pinching not only the front and rear edges but also the right and left edges of the packaging film F, when pushed up by the push-up member 171, the packaging film F is uniformly stretched and wrinkle-free. In particular, since there are gaps 66b, 72b on the inner edges 64a, 70a of the pressing surfaces 64.70 of the front and rear presser members 26.37, where the packaging film F does not come into contact with, the gaps 66b
, 72b, the degree of stretching of the packaging film F decreases and the stretching of the packaging film F is relaxed. Therefore, by simply changing the gaps 66b and 72b according to the flexibility and height of the tray W1, packaging can be carried out with an appropriate degree of stretch, and it is possible to wrap the packaging with an appropriate degree of stretch. Even when packaging tray W1
There is no possibility that the soft items stored in the tray W1 will be crushed due to deformation. In addition, since the tray W1 is normally placed on the pedestal device 46 with both longitudinal sides facing the front and rear pressers 026.37, when the holding force by the packaging film F is applied to both longitudinal sides, The tray W1 becomes very easily deformed. Therefore, the central pressing portions 26a, 37 of the front and rear pressing members 26.37 corresponding to both sides in the longitudinal direction
The gap portions 66b and 72b are formed in the tray W1.
This prevents deformation.

Next, the pedestal device 46 moves upward so that the article W comes into contact with the packaging film F, and the push-up member 171 separates from the packaging film F, so that the article W is covered with the packaging film F. The left and right press members 177 release the left and right edges of the packaging film F as the push-up member 171 moves downward. By this release, the pressing force on the item W is further reduced.

Thereafter, as the pedestal device 46 moves upward, the rear folding member 77, which is in the retracted position, moves forward. With this forward movement, both device members 151 approach each other. Both device members 151 push the packaging film toward the lower side of the item W on the mounting table of the pedestal device 46, and contact the same mounting table at a position slightly spaced downward from the bottom surface of the tray W1. The rear folding members 77 move forward, and the left and right folding members 82 also approach each other with a slight delay as the rear folding members 77 move forward. 77 and the left and right folding members 82 are similar to both the device members 151 and the product W.
When the rear folding member 77 enters below the article W, both device members 151 are separated from each other and separated from the article W, and the article W is placed on the rear folding member 77. Then, when the pedestal device 46 moves down again,
While the item W is placed on the rear folding member 77, the packaging film F is folded under the item W from both rear and left and right directions. In synchronization with this folding operation, the clamping by the central pressing part 37a and lateral pressing part 37b of the rear pressing member 37 and the horizontal pressing part 26b of the front pressing member 26 is released, and only the clamping by the central pressing part 26a of the front pressing member 26 is performed. maintain.

At the time of folding, the pushing member 161 moves forward and approaches the article W. After that, when the pushing member 161 moves further forward and pushes out the article W, the center pressing part 2 of the front presser member 26
6a is released and the belt conveyor 104 is rotated. Then, the article W is conveyed forward by the advancement of the push-out member 161 while being separated from or in contact with this belt conveyor 104, and is supported from above by this belt conveyor 104 to prevent swinging while being conveyed from above the rear folding member 77. It is transferred onto the front folding member 89. During the transfer, the packaging film F hits the front folding member 89 on the underside of the item W and is folded in from the front as well, and the folding from the rear overlaps with the folding from both left and right directions, and the folding from the front overlaps, resulting in the product W being folded from the front. The folding part is on the bottom side. Next, the rear folding member 77 retreats, and as the rear folding member 77 retreats, the left and right folding members 82 open from each other, and the push-out member 161 also retreats.

After packaging, the product W is carried out to the heater device 47, where the folded portions are brought into close contact with each other to complete one process.

Effects of the Invention In short, according to the present invention, packaging can be carried out with an appropriate degree of expansion by simply changing the gaps 66b, 72b of the holding member 26.37 according to the flexibility and height of the tray W1. Even when packaging a flexible tray W1 or a tall tray W1, the tray W1 may deform and the inside of the tray W1 may be damaged.

There is no fear that soft stored items will be crushed, and the product value can be maintained and improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of a fruit and vegetable packaging machine using a packaging film pressing device according to an embodiment of the present invention, and FIG. 2 is a schematic view of the packaging machine taken along line X-X in FIG. 3 is a schematic enlarged side sectional view of the folding device and the unloading device, FIG. 4 is a schematic enlarged sectional view of both devices as seen from the X-X line in FIG. 1, and FIG. 5 is a packaging film. FIG. 6 is a schematic enlarged sectional view taken along the line Y-Y in FIG. Partially cutaway front view of front holding member, No. 10
11 is a partially cutaway front view of the rear presser member, and FIG. 12 is a partially cutaway plan view of the rear holding member. Packaging film transport device 1, front press member 26, central press section 26a, lateral press section 26b, pressure receiving plate 27° rear press member 3
7, central pressing part 37a1 horizontal pressing part 37b, pressure receiving plate 38,
Supply device 45, pedestal device 46, pressing surfaces 64, 70. Inner edges 64a, 70a, recesses 65, 7L contact portion 66a
, 72a, gaps 65b, 72b, folding device 76, rear folding member 77, both left and right folding members 82, front folding member 89, belt conveyor 104, placing member 151, extrusion member 16
1. Push-up member 171, left and right press members 177, packaging film F, packaging section S, folding section R1 product W0 patent
Applicant Fujiback System Co., Ltd. Agent Patent Attorney On 1) Hironobu Figure 6

Claims (1)

[Claims] 1. A conveyance device (1) that conveys a band-shaped packaging film (F) to a packaging section (S), and a conveyance device (1) that conveys a band-shaped packaging film (F) to a packaging section (S), and a conveyor device (1) that conveys a band-shaped packaging film (F) to a packaging section (S); The product (W) is folded in from the front, back, left and right directions of W).
In a packaging machine equipped with a folding device (76) for wrapping the packaging film (F), both front and rear pressing members (26) (37) that sandwich the packaging film (F) at the time of folding are used at both widthwise ends of the packaging film (F). The pressing surface (6
The inner edges (64a, 70a) of the packaging film (F) have contact parts (66a, 72a) that come into contact with the packaging film (F) when sandwiching the packaging film (F), and the packaging film (F). ) A packaging film pressing device for a packaging machine, characterized in that a gap portion (66b, 72b) is formed that does not come into contact with the packaging film. 2. At least one of the front and rear pressing members (26) and (37) is divided into a central pressing part (26a, 37a) and horizontal pressing parts (26b, 37b) on both left and right sides of the central pressing part (26a, 37a). 26b, 37a, 37b) are interlocked with vertical movement mechanisms that can move them up and down separately, and the contact portions (66a, 72a) are connected to the central pressing portions (26a, 37a).
) and gaps (66b, 72b) are formed in the packaging film pressing device in a packaging machine according to claim 1.