JPS6055368B2 - Film bag packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a packaging device using a film bag, which is most suitable for application when filling and packaging solid materials such as ham in a plastic film bag, with one end being open and the other end being closed. The present invention relates to a packaging device using a film bag, which uses a cassette bag formed by stacking a large number of film bags, and automatically opens the opening of the film bag by sequentially picking up the film bag in order to sequentially fill the film bag with solid matter.

The applicant of the present invention has already filed an earlier invention for a packaging device using a film bag of this type (see Japanese Patent Application No. 59-46849). After picking up the film bag at the top, the film bag is transferred to a place where air is blown by a blower, and the opening of the film bag is opened with air.

According to this prior invention, there is an advantage that the film bags can be picked up one after another and their openings can be opened automatically. However, when picking up the film bags one after another from the cassette bag, Pick-up errors may occur, such as the film bag being picked up unexpectedly by adsorption, or the opening may not open properly when air is blown onto the film bag, or the film bag may be accidentally separated from the pick-up means (air Accidents such as being unable to fill the solid material due to it being blown away during the process were likely to occur. Furthermore, the entire packaging device was extremely large and had a very complicated structure. The present invention was invented in order to correct the above-mentioned defects, and it is possible to pick up film bags one by one accurately and open the openings reliably, and the entire packaging device is extremely small. , we are trying to provide a very simple structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a packaging device using a film bag according to the present invention will be described below with reference to the drawings.

First, as shown in FIG. 1, the film bag 1 used in this step is made of a plastic film, and has an opening 2 formed at one end 1a and a closed end 1b.

The other end 1b may be closed by, for example, a seal 3 by welding or by ligation. Further, a pair of holes 4 are provided at both left and right ends of the open end 1a of the film bag 1, passing through the film bag 1 vertically.
A large number of film bags 1 are stacked to form a cassette bag 5, and the cassette bag 5 is placed on a bag mounting table 6. At this time, a pair of left and right locking pins 7, which are fixed locking means, pass through the front end side of the bag mounting table 6 and extend upward, and the cassette bag 5 is secured to both sides by the pair of holes 4. It is inserted through the stop pin 7 and locked. And cassette bag 5 installed like this
The central part of the opening end 1b is pressed down from above by a holding plate 8, which is a fixed holding part, as will be described later. Note that 9 is provided on the bag mounting table 6. Although there is a pair of left and right positioning pieces, these do not necessarily need to be provided. Next, in FIGS. 2 to 4, the bag mounting table 6 is first mounted on the rear frame 11. As shown in FIGS.

This bag mounting table 6 is located at the bottom of the rear end! It is attached to the attachment part 13 of the rear frame 11 via a hinge 12, and is configured to be able to swing up and down about the fulcrum pin 14 of the hinge 12. On the other hand, both the locking pins 7 and the presser plate 8 are respectively fixed on the upper horizontal plate 15 of the rear frame 11, and the first locking pins 7 are inserted into the pair of left and right holes provided on the front end side of the bag mounting table 6. It is inserted through the hole 16 and extends upward. Note that adjustment screw portions 17 are provided at the lower ends of both locking pins 7, respectively, and the height of both locking pins 7 can be adjusted by adjusting the screw portions 17. Further, a pressing mechanism 19 with variable pressing force is provided at the lower part of the bag mounting table 6 to press it upward.

This pressing mechanism 19 is composed of, for example, an air cylinder 20 arranged vertically, and the lower end of the cylinder 21 is rotatably supported on a mounting portion 23 of the rear frame 11 via a fulcrum shaft 22. Further, the upper end of the cylinder rod 24 is rotatably supported via a fulcrum shaft 25 to a mounting portion 26 fixed to the lower part of the bar holder 6. In addition, in the pressure air supply path from the pressure air supply source such as the air compressor 28 to the air cylinder 20, there is, for example, a solenoid valve 29 and a pair of pressure adjustment valves 30, 3 set for high pressure and low pressure.
A solenoid valve 29 controls both pressure regulating valves 30.
, 31 can be switched.
Next, the upper horizontal plate 34 of the front frame 33 is configured to have approximately the same height S as the presser plate 8.

A blower 35 is attached to the front frame 33 at a lower position of the upper horizontal plate 34, and its blower port 36 is open toward the rear. The air blown out from the air outlet 36 is guided by the air guide 30 attached to the lower part of the upper horizontal plate 34, and is passed through the opening 38 provided at the center of the rear part of the upper horizontal plate 34 to the cassette. It is configured to be sprayed onto the opening 2 side of the bag 5. Further, a pair of arc-shaped solid material insertion guides 39 are provided on both sides of the opening 38 at the upper part of the upper horizontal plate 34 . Next, a pickup mechanism 41 is provided on one side of the rear frame 11, as shown in FIG.

The pickup arm 42 of this pickup mechanism 41 is supported via a support arm 43 that is vertically connected to the lower part of the pickup arm 42 . That is, a support stand 44 is vertically provided on a mounting portion 52 provided on one side of the rear frame 11, and a pair of upper and lower guide rollers 45, 46 are pivotally attached to the support stand 44. is provided for this S'L
It is engaged with both guide rollers 45 and 46 via a pair of upper and lower guide grooves 47 and 48 that are vertical and vertical. Also, the lower end of the cylinder 50 of the air cylinder 49 is the fulcrum shaft 51.
The upper end of the cylinder rod 53 is rotatably supported on the upper end of the support arm 43 via a fulcrum shaft 54. Then, the pickup arm 42 is driven to reciprocate up and down via the support arm 43 by the telescopic drive of the air cylinder 49 between the lowered position shown by the solid line in FIG. 4 and the raised position shown by the imaginary line. It is composed of At this time, due to the guiding action of the pair of upper and lower guide grooves 47 and 48 forming a vertical S'L shape, the pickup arm 42 is once raised vertically from the lowered position and then rotates around the lower guide roller 46. It is configured to be driven to reciprocate along an S-inverted L-shaped locus so that it is rotated clockwise in FIG. 4 and moved to the earth raising position. By the way, in this case, an adhesive tape 56 is used as a pickup means.

That is, a supply reel 57 wound with adhesive tape 56 and a take-up reel 58 that sequentially winds up the adhesive tape 56 supplied from the supply reel 57 are detachably attached to the rear end side of the pickup arm 42. . On the other hand, a pickup head 59 is provided at the tip of the pickup arm 42, and the adhesive tape 59 is pulled out from the supply reel 57.
6 is guided by a plurality of guide rollers 60 provided on the pickup arm 42, passes through the pickup head 59, and passes through a pair of pinch rollers 61, 62 provided on the pickup arm 42 to the take-up reel 58. There are buses everywhere. However, the adhesive surface of the adhesive tape 56 faces downward on the circumferential surface of the pickup head 59. One pinch roller 62 and the take-up reel 58 are driven by an intermittent drive mechanism (not shown) that is driven one cycle each time the pickup arm 42 is driven up and down once.
is configured to be rotated intermittently, whereby the adhesive tape 56 is intermittently drawn out from the supply reel 57 to the pickup head 59 portion at a constant pitch, and is wound onto the take-up reel 58. It is composed of The supply reel 57 is provided with a soft brake (not shown) that prevents the adhesive tape 56 from being pulled out due to its inertia. The film bag packaging apparatus of the present invention is constructed as shown in FIGS. 5A to 5D and FIGS. 6A to 6D, and the picking up operation of the film bag 1 and the inside of the picked up film bag 1 are shown in FIGS. 5A to 5D and FIGS. The filling operation of the solid material 64 such as ham will be explained. First, the cassette bag 5 is placed on a bag mounting table 6, and both holes 4 of the cassette bag 5 are inserted into both locking pins 7 from above and locked.

Further, the bag mounting table 6 is pressed upward by the pressing force of the air cylinder 20, and as a result, the center portion of the cassette bag 5 on the opening 2 side is pressed against the lower surface of the presser plate 8, as shown in FIG. Further, air blown from the blower 35 is blown onto the opening 2 side of the cassette bag 5. At this time, the electromagnetic valve 29 is switched to the pressure regulating valve 30 set at a high pressure, so the pressing force from the air cylinder 20 is strong, and the film bag 1 does not fly away due to air blowing. Next, when the start switch is turned on by a manual switch or foot switch in this state, the fifth
As shown in FIGS. A and 6A, the pickup arm 42 is lowered, and its pickup head 59 presses the adhesive tape 56 onto the top surface of the top of the film bag 1 on the opening 2 side of the cassette bag 5. Next, following this, as shown in FIGS. 5B and 6B, the pickup arm 42
is raised.

Then, the top surface of the topmost film bag 1 is covered with adhesive tape 5.
The opening 2 side end of the upper surface of the film bag 6 is pulled out from under the holding plate 8, and as the pickup arm 42 rises, the opening 2 of the film bag 1 is pulled upward.
will be held. By the way, at this time, while the adhesive tape 56 is pressed against the upper surface of the film bag 1 by the pickup head 59 and is subsequently raised, the solenoid valve 2 is closed.
9 is temporarily switched to the pressure regulating valve 30 side, which is set to a low pressure, and the pressing force by the air silicide 20 is temporarily weakened.

Therefore, the pressing force from the air cylinder 20 is temporarily weakened. During this time, the uppermost film bag 1 is pulled upward by the adhesive tape 56, and the top end of the film bag 1 on the opening 2 side is pressed against the presser plate 8.
easily pulled out from underneath. Immediately after the pulling operation, the solenoid valve 29 is switched again to the high-pressure pressure regulating valve 30 side, so the pressing force by the air cylinder 20 is strengthened again, and the tip of the opening 2 side of the lower surface of the uppermost film bag 1 is increased again. The lower film bag 1 is again strongly pressed against the lower surface of the presser plate 8. The temporary switching of the electromagnetic valve 29 is performed, for example, after a time set by a timer that starts operating when the start switch is turned on, the solenoid valve 29 is switched on for a certain period of time also set by the timer. Various methods can be adopted, such as a method in which the valve 29 is energized, or a method in which the position of the pickup arm 42 that is reciprocated up and down is detected by a detection switch and the solenoid valve 29 is energized for a certain period of time. As soon as the opening 2 of the uppermost film bag 1 is slightly opened, the air blown as described above enters the film bag 1, and the film bag 1 is opened as shown in FIGS. 5C and 6C. It is expanded into a cylindrical shape with air, and its opening 2 is completely opened in a circular shape.

When the film bag 1 is expanded into a cylindrical shape, the pair of holes 4 are naturally pulled upward from the upper ends of both locking pins 7. Note that at this time, the pressing force by the air cylinder 20 has already been strengthened, so the uppermost film bag 1 is pressed against the presser plate 8 at the tip of the lower opening 2 side.
It is firmly pinched and locked under the . Therefore, the film bag 1 is securely held on the cassette bag 5 and is never blown away by the air. Next, the opening 2 of the top film bag 1 is opened as described above.
In the opened state, a solid object 64 such as ham is guided by the insertion guide 39 and placed into the film bag 1 as shown in FIGS. 5C and 6C.

Then, due to the impact load at that time, the lower end of the film bag 1 on the side of the opening 2 is pulled out from under the presser plate 8, as shown in FIGS. 5D and 6D. The room bag 1 is transported together with the solid material 64 to the next process such as a packaging process. The film bag packaging device of the present invention is constructed and operated as described above, and can be used alone as described above. For example, in a vacuum packaging work line for hams, etc., it is combined with an inlet conveyor and an outlet conveyor for hams, etc., and the above-mentioned start switch is turned on based on the detection of incoming hams, etc., so that the hams, etc. are automatically placed in the film bag 1 one after another. It is also possible to use the container for filling and vacuum packaging.

Although one embodiment of the present invention has been described above, according to the technical idea of the present invention, the support structure of the bag mounting table, its pressing mechanism, the locking means, the pressing part, the pickup mechanism, and the structures related thereto. can be changed to various effective structures other than the embodiments.

For example, the pressing mechanism can be changed to one using a hydraulic cylinder device or a spring, and the pressing force can be temporarily weakened by switching the pressure regulating valve shown in the example, for example, by using a relief valve. Various methods can be adopted, such as a method of temporarily lowering the pressure inside the cylinder by operating the cylinder. Further, the pick-up means is not limited to the adhesive tape shown in the embodiments, but may also use, for example, a vacuum suction head. Further, the present invention can be widely applied as a device for filling film bags with ham and various other solid materials. As described above, the present invention allows the pickup means to be intermittently pressed against the upper surface of the open end side of the uppermost film bag of the cassette bag, and then raised, thereby raising the upper surface of the film bag upward. By pulling it up to
The open end of the top surface of the film bag can be easily pulled out from under the holding part, and after that, the pressing force from the air cylinder is strengthened again, and the air blown onto the open end side of the cassette bag is The cassette bag is prevented from scattering, and at the moment when the top surface of the film bag is pulled up, the blown air automatically opens the opening of the film bag and allows it to be released naturally from the locking means. This is what I did.

Therefore, when picking up film bags one after another from a cassette bag, there may be a pick-up mistake such as the lower film bag being sucked together and being picked up unexpectedly, or when opening the film bag by blowing air on it. , there is no inconvenience such as the opening not opening properly or the film bag being blown away unexpectedly making it impossible to fill the solid material, and the film bags are picked up one by one accurately and the opening is ensured. It can be opened to

Moreover, it has a function of simply pulling up the top surface of the film bag at the top of the cassette bag placed in a fixed position using a pick-up means, and then transports the picked-up film bag to a place such as an air blowing place. Since there is no need to transport the packaging device to another location, the packaging device as a whole becomes extremely compact, has a very simple structure, and can be provided at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the packaging device using a film bag according to the present invention, in which FIG. 1 is a perspective view showing a cassette bag and its mounting table, and FIG. 2 is a longitudinal side view of the entire rotor. Figure 3 is the same plan view as above, Figure 4 is Figure 3 -
(2) A sectional view taken along the line, FIGS. 5A to 5D are perspective views for explaining the operation, and FIGS. 6A to 6D are longitudinal sectional side views of the same.

Claims (1)

[Claims] 1 Using a cassette bag made by stacking a number of film bags with one end open and the other end closed, a bag mounting table configured to be movable up and down is provided, and the cassette bag is placed on this bag mounting table. By installing an air cylinder that presses the bag mounting table upward by locking its open end with a fixed locking means, and switching the pressure of the air supplied to this air cylinder between high pressure and low pressure. A solenoid valve is provided to switch the pressing force of the air cylinder between high pressure and low pressure, and a fixed presser part is provided that presses approximately the center of the opening end of the cassette bag from above relatively with the high pressing force of the air cylinder. a pick-up head that is capable of lifting the top surface of the film bag upward by intermittently pressing an adhesive tape against the top surface of the open end side of the film bag at the top of the cassette bag and then lifting the tape; A blower is provided to blow air to the open end side of the cassette bag, and the pick-up head intermittently presses the adhesive tape onto the upper surface of the uppermost film bag, and subsequently lifts the adhesive tape. and, while the upper surface of the film bag is pulled upward, the electromagnetic valve is switched to temporarily weaken the pressing force of the air cylinder from high pressure to low pressure.