JPH068122B2 - Device for cutting packaging film in automatic container packaging machine - Google Patents

Description

The present invention relates to a device for cutting a packaging film in an automatic container packaging machine for fully automatically concealing and packaging a container filled with food etc. with a thin transparent film. is there.

[Problems to be Solved by Prior Art and Invention]

 Conventionally, there are various automatic packaging machines of this type.

The inventor has improved the drawbacks of these conventional machines and completed an automatic container packaging machine particularly suitable for automatic packaging of packed mushrooms, and filed an application as Japanese Patent Application No. 61-313105.

This automatic container wrapping machine is an inner transfer part of a two-endless endless belt transfer belt, which holds a container covered with a transparent film in a cylindrical shape and continuously transfers it at intervals. The tubular film band between the containers is cut by a cutting device, and at the same time, the tubular film band at the cutting part is pushed down to adhere to the bottom of the container, but the size of the container is of a certain standard. It had the drawback that it could only be packaged.

The present invention improves this point and provides a cutting device for a packaging film in an automatic container packaging machine capable of adapting to large and medium-sized containers and packaging accordingly.

[Means for solving problems]

The configuration will be described in detail with reference to the attached FIGS. 11 to 13.

Inner transfer part 32 'of the two-end feeding endless belts 32, 33
In the transfer device c provided with the cutting device d, which holds the container 16 in which the transparent film 2 is cylindrically covered with 33 ', is continuously held at fixed intervals, a handle is provided on the machine frame 1. A turning screw shaft 72 with a handle that can be turned by 71 and a driven turning screw shaft 73 that turns in conjunction with the turning screw shaft 72 with a handle are arranged in parallel in a direction orthogonal to the belt transfer direction. A slide body 74, 75, 76 that separates from or approaches the turning screw shaft 72 with a handle and the driven turning screw shaft 73, respectively, by turning the handle.
77 are provided in opposition, and the guide frame 78 of one of the feeding endless belts 32 is provided on the opposite side by two slide bodies 74 and 76 on one side.
The guide frame 79 of the other feeding endless belt 33 is supported by the individual slide bodies 75 and 77, and the two guide frames 78 are provided.
-The columns 80 and 81 are erected on 79, and the columns 80 and 81
A slide guide mechanism 84 is provided between the left and right support plates 82, 83 provided on the upper part of the blades, and blade plate mounting plates 85, 86 are vertically installed on the left and right central portions of the left and right support plates 82, 83, respectively. Blade plates 87 and 88 are attached to the plate mounting plates 85 and 86, respectively, and the tip portion 8
7'and 88 'are provided in a superposed state, and left and right support plates 82 and 83
The present invention relates to a device for cutting a packaging film in an automatic container packaging machine, characterized in that film pressing plates 89 and 90 are provided on both front and rear edges, and inner edge portions 89 and 90 'are provided in a superposed state.

[Action]

 Based on the embodiment, detailed description will be made in the latter half of the embodiment section.

〔Example〕

1 to 10 show an automatic packaging machine developed by the applicant, in which a bobbin 3 around which a thin transparent film 2 is wound is installed above the front side of a machine frame 1.

The drawing shows a structure in which the bobbin 3 rolls on the two bobbin receiving and moving rolls 3'and the film 2 is pulled out.

A film holding device a for holding both edges of the film 2 drawn out from the bobbin 3 via the guide rollers 4 is provided symmetrically on the left and right wall portions 1'of the machine frame 1 diagonally below and in front of the bobbin 3.

The holding device a in the drawing has a drive shaft 5 and a floating shaft 6 as shown in FIG.
, The idle shaft 7 and the idle shaft 8 are vertically opposed to each other, and V pulleys 9 and 10 are provided respectively, and a V pulley is provided between the V pulleys 9 and 10.
The belts 13 and 14 are suspended, and the inner transfer portions of the V belts 13 and 14 are brought into contact with each other in a superposition pressure contact state.

FIG. 3 shows internal teeth 11 on the inner surface instead of the V belts 13 and 14.
-Endless belt 13 'provided with 12. 14 ', V-pulley 9/10 instead of a pinion car 9'. The case where 10 'is provided is illustrated.

Further, the film support roller 15 is attached in a cantilever state inside the drive shaft 5 and the floating shaft 7 located on the upper side.

A mounting table 17 for the dish-shaped container 16 is provided in front of the middle of the right and left holding devices a.

A device b for feeding the container 16 is provided below the machine casing 1.

The feeding device b shown in the drawing has a guide long window 18 on the mounting table 17.
Is provided so that the container 16 is pushed by the pushing plate 19 protruding from the long guide window 18.

In the drawing, a transfer cylinder 20 is provided in the horizontal front-rear direction on the lower rear side of the machine frame 1, and a rack rod 22 is attached to the tip of a piston rod 21 protruding from the transfer cylinder 20 in an extended state. A case is shown in which a supporting arm 23 is erected at the tip, and a pushing plate 19 is attached to the supporting arm 23 to feed the container 16 to the film 2 side by the retracting action of the piston rod 21.

A transfer device c that transfers the container 6 to the rear of the machine frame 1 is provided behind the holding device a for holding the film 2.

The transfer device c shown in the drawing is provided with drive vertical axes 24 and 25 on the left and right sides of the rear side of the film supporting roller 15, and the drive vertical axis 24
The feed endless belts 32 and 33 are provided between the friction wheels 26 and 27 provided on the .25 and the friction wheels 30 and 31 provided on the vertical axis 28. The container 16 is provided so as to hold the side edge of the container 16 according to the width of the container 16.

A support bar 3 in which film winding guide rods 34 and 35 are installed on the machine frame 1 near the drive shaft 5 of the holding device a immediately before the front ends of the transfer endless belts 32 and 33 of the transfer device c.
6 is laid vertically symmetrically, and is bent slightly downward from the position of the mounting table 17 in a horizontal state in the rear and in a state in which the distance becomes narrower toward the rear to form horizontal extension rod portions 34 'and 35'. To do.

The film winding guide bars 34 and 35 are stationary.

The drawing shows that the winding belts 37 and 38 are slightly above the film winding guide rods 34 and 35, along with the folding direction of the film winding guide rods 34 and 35, that is, the horizontal extension rod portions 34 'and 35', and drive pulleys 39 and 40. The case where the idle pulleys 41 and 42 are installed obliquely is shown.

The mounting table 17 for the container 16 described above is extended to between the transfer devices c.

The above is the description of the portion for concealing the film 2 in the container 16, and the drive system is provided with the main gear 43 that rotates by meshing with the rack rod 22 described above. A chain 46 is suspended on sprocket gears provided on the shaft 5 and the driven shaft 45 to drive them.

Bevel gears 47 and 48 are provided on the driven shaft 45, and bevel gears 49 and 50 that mesh with the bevel gears 47 and 48 are provided on the drive vertical axes 24 and 25 to drive the endless belts 32 and 33, and at the same time drive pulleys 39 and 40. Also drives the endless belts 37 and 38 to be wound.

Next, the cutting device d will be described.

Since the containers 16 are sent one after another, as shown in FIG.
Between the container 16 and the container 16, there is a cylindrical film 2'which is deformed into a flat cylindrical shape conforming to the container shape.

The space between the containers is determined by the timing at which the transfer cylinder 20 is retracted.

The stopping device for the container 16 is determined by the stroke of the piston rod 21.

A cutting device d for cutting the intermediate portion of the tubular film 2 ′ between the containers 16 is provided above the machine frame 1.

In the cutting device d shown in the drawing, a cutting cylinder 53 is vertically provided on a side portion of the machine frame 1, and a supporting arm 56 is projectingly provided on a top end 55 of the piston rod 54. A guide plate 57 having a rectangular shape is vertically provided, and a width holding guide 58 and a cutting blade 59 are vertically provided at an intermediate portion of the guide plate 57.

The lower end of each is vertically extended downward by a guide plate 57, a cutting blade 59, and a width holding guide 58 little by little.

Immediately below the lower edges 57 ', 57 "of the guide plate 57, the clamping rolls 60, 61 for pressing the cutting edges 2" of the tubular film 2'and the elastic clamping rolls 62, 63 are brought into contact with each other. Set up.

Further, a support case 64 for the rear gripping roll 61 and the elastic pressure gripping roll 63 is attached to the tip of a piston rod 66 of an auxiliary cylinder 65 provided horizontally in the rear part of the machine frame 1.

In FIG. 10, the operations of the guide plate 57, the width holding guide 58, and the cutting blade 59 are separated, the guide plate 57 and the cutting blade 59 are lowered by the cutting cylinder 53, and immediately before that, the guide plate 5 is moved.
7, the cutting assist cylinder 67 is operated to lower only the width holding guide 58 first, and the holding device e is provided at the rear of the cutting device d, and the holding device cylinder 68 holds the holding cushion board 69 in the container 16. The container 16 is lowered to press the container 16 and the endless belt 32 is fed at the time of cutting.
• At 33, prevent the container 16 that is not being held upside down.

Further, a needle bar 70 is hung vertically behind the guide plate 57, and when the rear cutting edge 2 ″ of the tubular film 2 ′ is stroked to the bottom surface of the container 16 by the oppressing and clamping roll 63, the needle bar 70 is guided. By lowering together with 57 and forming an air escape hole in the rear cutting edge 2 ″, it is possible to prevent the air trapped inside from escaping from the hole perforated by the needle bar 70 and disabling the stroke. FIG.

Incidentally, the guide plate 57 is subjected to surface sliding processing, and the clamping rolls 60 and 61 are made of a metal rough surface roller and a pressure clamping roller 62.
-If 63 is made of a plastic smooth surface roller, the rear cutting edge 2 "of the tubular film 2'is prevented from being pulled up together when the guide plate 57 returns, and then the stroke is improved.

In the drawings, reference numeral 51 is a curved plate designed so as not to break the film 2 when returning, and 52 is a leg portion.

Next, the operation will be described based on this embodiment.

The container 16 is mounted on the mounting table 17.

When the switch of the transfer cylinder 20 (which is convenient for work when a foot pedal switch is adopted) is turned on, the piston rod 21 is retracted, the rack rod 22 is moved rearward, and the container 16 is fed by the pushing plate 19 to produce an endless belt. Push it to the entrance of 32/33.

At this time, the container 16 hits the film 2 whose both edges are pressed by the holding device a and pushes the intermediate part of the film 2 a little further and pushes it further. .

The horizontal extension rod portions 34 ', 35' of the film winding guide rods 34, 35 are narrowly opposed to each other in a plane C shape, so that they are held by the endless belts 32, 33 and the container 16 is moved backward. When extending, the above-mentioned C-shaped horizontal extension rod portion 3
Due to the presence of 4 '/ 35', both edges of the film 2 are pushed down to the side surface of the container 16 and further moved rearward, and the horizontal extension rod portions 34 '/ 35' are positioned below the container 16. Therefore, the film 2 is inevitably rolled up under the container.

Since this film 2 is thin and adherent, such as the brand name Saran Wrap, the container 16 is pushed up so as to raise the center of the film 2 in a tensioned state, and then the container is wound by the above-mentioned winding action. When the film 2 is wound under the container 16, the film 2 adheres from the side surface to the bottom surface of the container 16 and wraps the container 16.

Next, the cutting action will be described.

When the piston rod 21 of the cutting cylinder 53 is retracted, the width holding guide 58 hung vertically in the middle of the guide plate 57 first hits the tubular film 2 ′, and the tubular film 2 ′.
Hold down the width of the tongue a little.

At that time, the cutting blade 59 hits and cuts the tubular film 2 ′, and the cutting edges of the tubular film 2 ′ are pushed downward by the front and rear lower edge portions 57 ′ of the guide plate 57, and the sandwiching roll 60. It will be pushed between each of 61 and the pressure-resisting adhesion roll 62.6.

The part where the cutting device d moves up and down is designed so that a part of the extension of the mounting table 17 is cut.

Subsequently, when the guide plate 57 rises and the container 16 moves, the cutting edge of the container 16 on the front side is stroked to the lower side of the container by the pressure-adhering crawling roll 62 and attached to the bottom surface as shown in FIG. .

Further, as shown in FIG. 8, the cutting edge 2 "of the container 16 on the rear side is moved by the retraction operation of the piston rod 66 of the auxiliary cylinder 65, and the elastic clamping roller 62 is rapidly moved together with the support case 64. Apply to the bottom of the capacity by applying it.

The transfer cylinder 20, the cutting cylinder 53, the auxiliary cylinder 65, and the auxiliary cutting cylinder 67 are equipped with a compressor in this machine and the operation timing is adjusted and set by air.

The operation of the present invention will be described above with reference to FIGS. 11 to 13.

When the handle 71 is rotated, the rotating screw shaft 72 with a handle is rotated, and this rotation causes the driven rotating screw shaft 73 to be rotated by the rack belt 91. By this rotation, the slide body 74
75 and the slide bodies 76 and 77 approach each other or move away from each other.

Therefore, even if the container 16 is large, medium, or small, the handle 71 can be turned each time to adjust the interval between the guide frames 78 and 79 to just hold the container 16.

This mechanism may adopt a normal bolt and nut mechanism to employ the left and right as anti-opposite screws. Alternatively, the slide body 75 on one side may simply be a slide type, and a slide body connected to this slide body 75. A bolt / nut mechanism may be adopted for the driven rotary screw shaft 73 and the slide body 76 may be a slide type.

In the figure, reference numerals 92 and 93 are rack pulleys and 94 and 95.9.
6.97 is a bearing body.

Bevel gears 47, 48, 49 and 50 for driving the endless belts 32 and 33 are provided so that they can be slidably fixed so as to mesh with the guide frames 78 and 79 with respect to the shaft 45 so that the drive can be transmitted. Set up.

The slide bodies 74, 75, 76, 77 slide, and the spacing between the guide frames 78, 79 expands, for example, the support plates 82, 83 connected by the slide guide mechanism 84 also slide in that state.

Therefore, the tip plate 87 '/ 88' has a superposed blade plate 87 /
Since the cutting width of 88 is widened, it can be cut sufficiently even if the container 16 is large and the width of the tubular film strip 2'is wide.

Similarly, the widths of the support plates 82 and 83 also widen, and conversely narrow.

That is, since the guide frames 78 and 79 are regulated by the four slide bodies 74, 75, 76, and 77 and the slide guide mechanism 84 of the cutting device d at two spaced locations, the guide frames 78 and 79 can be smoothly widened and narrowed. You will be able to slide to.

The drive mechanism in the embodiment of FIG. 11 is the drive mechanism of the embodiment of FIG. 1, in which the forward / reverse motor 98 rotates the pinion gear 100 through the sprocket gear 99 to move the rack 22, and the one-way clutch mechanism. The sub drive shaft 45 is rotated via the main drive shaft 44 by the main gear 43 containing the above.

Further, a case is shown in which the cutting device d is moved up and down by operating the crank mechanism f from the forward / reverse motor 98.

In the figure, reference numeral 101 is a limit switch for forward / reverse switching,
Reference numeral 102 is a limit switch that stops at one rotation.

〔The invention's effect〕

Since the present invention is configured as described above, it becomes a convenient device for cutting a packaging film in an automatic container packaging machine that adapts to the width of a container of any size and automatically changes the width of the device for cutting a packaging film. .

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a side sectional view of the present device, FIG. 2 is a perspective view of a container feeding portion, and FIG. 3 is a partial cutaway of another example of the holding device a. Plan view, FIG. 4 is a plan view of the container feeding section, FIG. 5 is a vertical sectional side view of the cutting edge before cutting, FIG. 6 is a vertical sectional front view of the same as above, and FIG. 7 is a vertical sectional side view when cutting the cutting edge. , FIG. 8 is a vertical sectional side view after cutting the cutting edge, FIG. 9 is a vertical sectional side view immediately after moving the same, FIG. 10 is a vertical sectional side view of another example of the cutting edge, and FIG. FIG. 12 is a plan view and FIG. 13 is an enlarged front sectional view of a main part. c ... Transfer device, d ... Cutting device, 1 ... Machine frame, 2 ...
Film, 16 ... Container, 32, 33 ... Endless belt for feeding, 32 ', 33' ... Inner transfer part, 71 ... Handle, 72 ... Rotating rod shaft with handle, 74, 75, 7
6,77 …… Slide body, 78,79 …… Guide frame, 8
0, 81 ... Supports, 82, 83 ... Support plate, 84 ... Slide guide mechanism, 85, 86 ... Blade plate mounting plate, 87,
88 ... Blade, 87 ', 88' ... Tip, 89, 90
...... Film pressing plate, 89 ', 90' ... Inner edge.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-52025 (JP, A) Actually developed S57-159604 (JP, U)

Claims (1)

[Claims] 1. A cutting device for holding a container coated with a transparent film in a cylindrical shape by clasping it at an inner transfer part of a two-end feeding endless belt and continuously transferring it at intervals. In the transfer device, a rotating screw shaft with a handle that is rotated by a handle on a machine frame and a driven rotating screw shaft that rotates in conjunction with the rotating screw shaft with a handle are orthogonal to the belt transfer direction. Slide bodies that are arranged side by side in parallel are provided opposite to the rotary screw shaft with a handle and the driven rotary screw shaft, respectively, which slide away from each other or approach each other by the rotation of the handle. The guide frame of the belt is supported by the other two slides on the opposite side to support the guide frame of the other endless feeding belt, and the columns are erected on the two guide frames, and between the left and right support plates provided at the top of the columns. Slide guide mechanism , The blade plate mounting plates are hung vertically on the left and right of the center of the left and right support plates, and the blade plates are mounted on the left and right blade plate mounting plates in a superposed state. A device for cutting a packaging film in an automatic container packaging machine, characterized in that a pressing plate is also provided on the inner edge portion in a superposed state.