JPS61142110A - Film pushing-up 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 (Field of Industrial Application) This invention is particularly directed to a packaging machine for fruits and vegetables that wraps flexible trays, in which a packaging film stretched and gripped by the packaging section is folded onto the tray. This invention relates to a packaging film pushing device used to cover an item with a packaging film from above when the item is loaded.

(Prior Art) Conventionally, for example, in the packaging machine described in Japanese Patent Application No. 189426/1989, the packaging film stretched in the packaging section is clamped by both front and rear presser 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 covering the tray from above, and then the packaging film is folded by the folding device below the tray. and the trays are packaged.

That is, for example, in the folding device of the packaging machine, the rear folding members move in the front and rear directions with respect to the fixed front folding section and the material, approaching and separating from each other, and below the rear folding members, as the rear folding members move back and forth, they move left and right. The two 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, as the rear folding member moves forward and the left and right folding members close together, these folding members push the packaging film toward the bottom of the tray on the mounting table and push it against 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 turns back, and as the rear folding member moves backward, the left and right folding members also open from each other.

(Problem to be solved by the invention) However, since the packaging film is directly pushed up by the product, especially when packaging flexible or tall trays, the tray may deform and the soft storage inside the tray may occur. There was a strong fear that objects would be crushed, which caused a decline 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 conveying device 1 for transporting the product W to the packaging section S, and a folding device 76 for wrapping the product W by folding the packaging film F stretched in the packaging section S into the product W from the front, back, left, and right directions, this folding A push-up member 171 is provided to push up the packaging film F before covering the product W with the packaging film F from above.

(Function) Then, the packaging film F stretched on the packaging section S is first pushed up by the push-up member 171, and then the article W rises and comes into contact with the packaging film F, and the push-up member 1
71 is separated from the packaging film F, and the article W is covered with the packaging film F from above.

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

Figs. 1 to 4 show a round belt type conveying device 1 arranged on the upper part of the machine frame, and as shown in Fig. 2, the starting end of the packaging film F is guided and set from the film supply port P.
From this set state, the packaging film F is spread onto the packaging section S in FIG. 1 by driving the conveying device 1.

Fig. 1.3.4 shows the packaging film folding device 76 disposed above the conveying device 1, and includes a fixed front folding member 89 and a folding film folding device 76 that moves toward and away from the front folding member 89 in the front and rear directions. The rear folding member 77 is movable to the rear folding member 77, and the left and right side folding members 82 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, the left and right folding members 82 are interlocked with each other so that they can be opened and closed, and these front, rear, left and right folding members 89
, 77.82 is a folding portion R in which the folding members 89.77°82 approach each other and fold the packaging film F 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.

A pair of placement members 151 are supported above the rear folding member 77 so as to be rotatable in the left and right directions corresponding to the left and right folding members 82, and are normally biased to open each other. As the 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, and is a belt conveyor that is
is supported.

As shown by the white frame in FIGS. 1 and 2, 46 is a pedestal device that is moved up and down between the inner end of the supply device 45, the packaging section S, and the folding section R, and is biased to be tiltable. The feeding device 45 is provided with a plurality of mounting tables (not shown), and the feeding device 45 is
The article W is transferred from and placed thereon.

(Refer to Japanese Patent Application No. 58-41304.) In Figures 1 to 4, 26 is a front presser member attached to the front side of the packaging section S of the packaging film conveying device 1, and 37 is a rear presser member also attached to the rear side. These pressing members 26 and 37 are designed to hold both front and rear edges of the packaging film F stretched in the packaging section S.

Reference numeral 43 denotes a saw blade mounted near the film supply port P of the packaging film conveyance device 1, and is configured to form perforations at intervals of a certain length of the packaging film F during conveyance.

As shown in FIGS. 1.2.5 to 10, reference numeral 171 is a push-up member connected by a shaft 173a to the tip of a lever 173 fixed to a rotating shaft 172 on both left and right sides of the pedestal device 46. It consists of both upright rods 171a extending upward from this shaft 173a and a frame 1711) that is removably inserted between the upper ends of both of these upright rods 171a, and a lever is provided in the middle of both of these upright rods 171a. 174 is axis 17
A horizontal rank mechanism is constituted by being rotatably connected with 4a. Reference numeral 175 denotes a lever plate rotatably supported on the upper end of the link 176 with a shaft 176a on both left and right sides of the frame body 171b, and 177 denotes this lever plate 1.
both left and right pressing members tiltably supported on 75;
178 is a guide elongated hole formed along the longitudinal direction of the link 176, into which a guide piece 179 fixed to the lever 174 is inserted. 180 is the lever 17
3, which is always connected to the lever 17.
3 is biased to tilt downward.

Reference numeral 181 denotes a spring connected to the lever plate 175, which always urges the lever plate 175 to tilt upward. Reference numeral 182 denotes a pressure receiving plate fixed to the machine frame above and facing the left and right pressing members 177.

As shown in FIG. 5, when the lever 173 is tilted downward by the bias of the spring 180, the upright rod 171a of the push-up member 171 moves downward and the frame body 171a moves downward.
71b also moves downward, and with this downward movement, the lever 174 tilts downward and pulls down the link 176, and this pulling down causes the lever plate 1 to move downward.
75 tilts downward against the bias of the spring 181,
The left and right pressing members 177 have also moved downward and separated from the pressure receiving plate 182. From this state, as shown in FIG.
When the lever 173 is tilted upward against the bias of the spring 180 by rotation of 72, the upright rod 171a of the push-up member 171 moves upward, and the frame 171b moves toward the packaging section S and the folding section R. Move upward towards the target. With this upward movement, the lever ~ 1
When the link 74 tilts upward, the guide piece 179 moves upward along the guide elongated hole 178 of the link 176. Following this, the lever plate 175 tilts upward under the bias of the spring 181 and pulls up the link 176, and when the frame 171b reaches the vicinity of the pressure receiving plate 182, both the left and right presser members 177 are pressed against the pressure receiving plate 182. Opposite spring 1
They are pressed together by the urging force of 81. Both left and right pressing members 177
When the lever 173 is tilted upward as shown in FIG. 8 while maintaining this pressed state, the frame 171b further moves upward and the guide piece 179 of the lever 174 moves along the guide elongated hole 178 of the link 176. and move upwards.
When the guide piece 179 is locked to the upper end of the guide elongated hole 178, the lever 174 stops tilting and the frame 17
1b also stops. Conversely, when the lever 173 tilts downward, the upright rod 171a of the push-up member 171 and the frame 171b
moves downward, the lever 174 tilts downward, and its guide piece 179 moves downward along the guide elongated hole 178 of the link 176. Accordingly, when the guide piece 179 is locked to the lower end of the guide elongated hole 178 as shown in FIG. 10, when the link 176 is pulled down, the lever plate 1
．． 75 is tilted downward by the bias of the spring 181,
Both the left and right pressing members 177 move downward and separate from the pressure receiving plate 182.

Note that 47 is a heater device on which the packaged goods carried out from the front folding member 89 are placed.

Next, an outline of the actual packaging operation will be explained.

When an article W (a tray W1 containing an article) is placed on the supply device 45, the article W is transferred and placed on the pedestal device 46 that has moved downward.

At this time, the push-up member 171 is already at the lowest movement position,
Also, the rear folding member 77 retreats.

When the conveying 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 conveying device @1. On the way, the saw blade 43 forms perforations in the width direction of the packaging film F at every fixed length, and an instantaneous brake is applied at the supply port P, and the packaging film F is pulled.
Due to this tensile force, it is cut at the perforations and conveyed to the top of the packaging section S.

The packaging film F on the packaging section S is held by both the front and rear pressing members 26.
It is clamped by the upward movement of 37.

When the push-up member 171 is moved upward from this packaging film set state, when the frame 171b reaches the packaging film F as shown in FIG.
7 comes into contact with the pressure receiving plate 182 and also pinches both left and right edges of the packaging film F. Thereafter, as shown in FIGS. 2 and 8, the packaging film F is pushed up and stretched by the frame 171b. In this way, by holding not only the front and rear edges but also the right and left edges of the packaging film F, when pushed up by the frame 171b, the packaging film F is uniformly stretched and wrinkle-free.

Next, as shown in FIG. 9, the pedestal device 46 moves upward so that the article W comes into contact with the packaging film F, and as shown in FIG. The product W is separated from F and covered with the packaging film F from above.

At this time, the article W is pressed down from above by the stretching of the packaging film F, but the packaging film F is usually held by the frame 171.
Since the product W does not shrink much in a short period of time after it is stretched by the upward movement of b and until the end of packaging, not much pressing force is applied to the product W. As the frame body 171b moves downward, the left and right pressing members 177 separate from the pressure receiving pressure 11'82h1, and the left and right edges of the packaging film F are released from being held. By this release, the pressing force on the item W is further reduced. In this way, since the dedicated push-up member 171 is used without directly pushing up the packaging film F with the item W, even when packaging a flexible tray W1 or a tall tray W1, There is a risk that the tray W1 will deform and the soft items stored in the tray W1 will be crushed.In conjunction with the vertical movement of the push-up member 171, the left and right presser members 177 move toward and away from the pressure receiving plate 182. Therefore, as the frame 171b is pushed up or separated from the packaging film F, both the left and right pressing members 177
The timing of clamping or releasing can be easily set with a simple structure, and the functions of both the left and right pressing members 177 can be sufficiently performed in conjunction with the frame body 171b.

Thereafter, as the pedestal device 46 moves upward, the rear folding member 77, which is in the retracted position, moves forward. Along with this forward movement, the placement members 151 approach each other. This placing member 151 pushes the packaging film F toward the lower side of the item W on the placing table of the pedestal device 46, and places it on the placing table at a position slightly spaced downward from the bottom surface of the tray W1. It makes contact and tilts, enters below the item W, and places it thereon. At this time, as the rear folding member 77 moves forward, the left and right folding members 82 also approach each other with a slight delay. Next, the rear folding member 77 and both left and right folding members 82 are used to hold the article W in the same manner as the placement member 151.
When the rear folding member 77 enters sufficiently below the article W, the placement 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 rear presser member 37 is released, and only the clamping by the front presser member 26 is maintained.

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 clamping by the front presser member 26 is released and the belt conveyor 104 is released. be rotated. The article W is conveyed forward by the advancement of the push-out member 161 while being separated from or in contact with the belt conveyor 104, and is supported from above by the belt conveyor 104 to prevent swinging while being held by the rear folding member 7.
7 and onto the front folding member 89.

During the transfer, the packaging film F hits the front folding member 89 on the lower side of the item W and is folded in from the front, and the folding from the rear is overlapped with the folding from both left and right directions, and the folding from the front is further overlapped. 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 each other, and the extrusion member 1
61 also retreats.

The article W to be packaged is carried out to the heater device 47, where the folded portion is brought into close contact, and one process is completed.

Effects of the Invention In short, according to the present invention, the packaging film F is not pushed up directly by the item W, but the dedicated push-up member 171 is used, so that the packaging film F is not pushed up directly by the product W, so that it can be used in a flexible tray W1 or a tall tray W1.
Even when packaging products, there is no fear that the tray W1 will deform and the soft items stored in the tray W1 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 pushing device according to an embodiment of the present invention;
The figure is a schematic cross-sectional view of the packaging machine taken along the line x-X in Figure 1.
Figure 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 line X-X in Fig. 1, Fig. 5 is a schematic side view showing the push-up member and both left and right presser members, and Fig. 6 is a schematic plan view as well. , and FIGS. 7 to 10 are schematic side views showing the vertical movement of these and the positional relationship between them and the pedestal device. Packaging film transport device 1, front press member 26, rear press member 37, supply device 45, pedestal device 46, folding device 76,
Rear folding member 77, left and right folding member 82, front folding member 89
, belt conveyor 104, placing member 151, pushing member 161, pushing up member 171, upright rod 171a, frame 17
1b, lever 173, 174, link 176, left and right pressing members 177, guide slot 178, guide piece 179, pressure plate 182, packaging film F, packaging section S, folding section R1
Product W0 Patent applicant Fujiback System Co., Ltd. Agent Patent attorney On 1) Hironobu Figure 5 Figure 6 182i j l'/':) Figure 7↓ Figure 8 Figure 9, Figure 7F ↓ No. 10 Figure/F

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 a product, a push-up member (that pushes up the packaging film (F) before covering the product (W) with the packaging film (F) from above during folding) is used. 171) A packaging film pushing-up device in a packaging machine, characterized by comprising: