JPS5820489Y2 - vacuum packaging machine - Google Patents

Description

[Detailed explanation of the invention] This invention uses a thermoplastic packaging film that is heated and softened in a short time by the heat generated by a quartz tube heater above the surface of the vacuum machine, and is clamped between the upper frame and the lower frame. While being vertically lowered by the elevating member, the actuating member is set facing the switch for opening and closing the electric circuit of the quartz tube heater, which is set on a plate attached to a vertical guide frame on one side of the lower frame, to ensure that this switch is activated. The quartz tube heater is turned OFF to cut off the power transmission to the quartz tube heater and temporarily extinguish the heat generation state. The present invention relates to an improvement of a vacuum packaging machine that prevents breakage of the fusion to frames and horizontal perforated base plates to optimize vacuum packaging and improve packaging efficiency.

Conventionally, in a vacuum packaging machine using thermoplastic packaging film, the packaging film is clamped between an upper frame and a lower plate, and then raised to approach an electric heater, such as a quartz tube heater, to release the electric heat. The packaging film is heated and softened by the heat generated by the heater, and the heated and softened packaging film is lowered to cover the packaged item on the horizontal perforated base plate, which performs a vacuum action by lowering the upper and lower frames. In addition, there is a risk that the packaging film, which is softened by the automatic continuous heating of the electric heater, may elongate and break due to the overheating phenomenon, making vacuum packaging of the packaged item impossible. When the packaging film is lowered by the upper and lower frames, it is continuously heated by an electric heater (thermal radiation), and the packaging film in a softened state is heated by the electric heater that continuously generates heat.A horizontal perforated table that performs a vacuum suction action. The fusion may break on the plate, making it impossible to vacuum package the packaged item, or the packaging film, which has softened due to heat, may remain fused to the upper and lower frames, which are heated by an electric heater that continuously generates heat, causing horizontal porous damage. When an object to be packaged placed on a base plate is lowered to be wrapped therein, the packaging film in a heated and softened state is sucked by the vacuum action of the horizontal perforated base plate. This has a serious drawback in that it immediately cuts from the inner peripheral edge of the heated upper and lower frames, making the vacuum packaging of the packaged items defective due to the vacuum suction effect.

The invention of the present invention eliminates and solves the various drawbacks of the conventional vacuum packaging machine at once and improves it so that vacuum packaging can be carried out constantly, properly and efficiently.

In addition, conventionally, in heat welding equipment for heat-melting films,
In order to extend the lifespan of its component parts such as Teflon sheets, silicone rubber, and heating wires, the heat-melting properties of the heat-melting film should not be affected by low-voltage parts, but only by high-voltage parts. An upper heat welding and heat welding device that reciprocates up and down by the upper and lower cylinders and a lower heat welding and heat fusing device are installed, and a limit switch and a new fixed part are attached to the upper heat welding and heat fusing device. A contact piece of a limit switch is installed, and a contact piece that contacts the limit switch of the fixing part is installed in a lower thermal welding and thermal fusing device, and furthermore, this lower thermal welding and thermal fusing device sandwiches a thermally fusible film. The heating wire that comes in contact with the wire is set on silicone rubber, a Teflon sheet is placed over the top of the wire to prevent film from adhering, the silicone rubber is embedded in a support metal fitting, and the Teflon sheet is placed on the support metal fitting through a guide plate. The limit switch of the upper thermal bonding and thermal fusing device is connected in parallel with the limit switch of the fixed part, and the limit switch of the upper thermal bonding device and the relay are connected in parallel. A low voltage circuit of heating wires connected in series, a fixed part limit switch, a timer connected in series, connected in parallel to the primary side of the transformer, and a timer and relay connected in parallel, and a high voltage circuit. For a certain period of time immediately before thermal welding, the low voltage circuit is switched to a high voltage circuit, and the voltage of the high voltage circuit is adjusted.Even if the number of objects to be processed changes after the voltage adjustment, the The heat welding is performed under almost the same conditions without increasing or decreasing the amount of excess heat, and the lifespan of these parts is extended without adversely affecting the Teflon sheet, silicone rubber, or heating wire, which are the components of the heat welding. This is known from Japanese Utility Model Publication No. 52-52077.

However, according to this apparatus for thermally welding and thermally cutting thermally fusible films, in terms of actual production and sales, the entire apparatus requires many components (Teflon sheet, silicone rubber, heating wire), etc. The product requires fluid pressure cylinders in the upper and lower thermal welding and thermal cutting devices, as well as limit switches, relays, timers, and transformers in the low voltage circuit and high voltage circuit. It is not practical because it is expensive and requires a certain amount of investigative knowledge when purchasing and using it.

The invention of the present application is an improvement of a vacuum packaging machine which has a different purpose, configuration, and effect from the above-mentioned thermal bonding device for heat-fusible films, and improves the security of packaging films and perfects vacuum packaging using a quartz tube heater. The purpose of this product is to provide a vacuum packaging machine at a relatively low price that requires only a small number of parts due to its configuration, is easy to assemble, has a low manufacturing cost, and is easy to handle and use. be.

Hereinafter, the configuration of this invention will be explained with reference to the illustrated embodiment.
A negative pressure chamber for sucking the air above the vacuum frame 1 is provided, and a thermoplastic packaging film is disposed above the horizontal upper wall 3 so as to be vertically movable and substantially horizontal. A guide frame 6. The upper frame 4 of the upper and lower clamp frames 4, 5 is pivotally attached to the rear part of the lower frame 5 so as to be able to be opened and closed, and the lower frame 5 is connected almost perpendicularly to the side of the vacuum crosspiece 1. It is connected to an elevating member 10 which is provided so as to move up and down vertically in a guide rail 7 with trochanters 8 and 9 as guides.

An arm lever 1 that raises this elevating member 10
1 is pivotally attached to the front side of the vacuum crosspiece 1 with a pivot 12, and further includes an arm lever 13 that vibrates the upper frame 4 upward to unfold it.
are both pivotally connected to the front side of the vacuum crosspiece 1 by the pivot 12.

An operating member 14 such as a planar cam that vibrates the arm lever 13 and the arm lever 11 individually with a time difference in relation to each other is provided on the front side of the vacuum crosspiece 1 by being fitted and connected with a support shaft 15. Trochanters 16 and 17 are mounted on one end and the other end of the operating member 14 with the support shaft 15 of the operating member 14 as the center.

An operating handle 18, which rotates the operating member 14 by approximately 180 degrees, is fitted and connected to the support shaft 15 on the front right side of the vacuum machine surface 1.

Then, the operating handle 18 is rotated backward about the support shaft 15, brought down to a horizontal position, and then, as shown in FIG.
The operation handle 18 is started by 0' rotation and stopped temporarily, and then the operating handle 18 is rotated forward by approximately 140 degrees as shown in FIG. 3 and stopped temporarily at a horizontal position.

By rotating the operation handle 18 by a predetermined angle, the support shaft 1
5, the actuating member 14 is rotated through the same angle.

As a result of this rotation of the operating member 14, the trochanter 16°17
The arm levers 11 and 13 are vibrated separately with a time difference, one arm lever 13 is used to push up and open the upper frame 4, and the other arm lever 11 is used to move the upper and lower frames 4 via the elevating member 10. .

To explain the vacuum packaging process of this invention, first,
With the operating member 14 and the arm lever 13 opening the upper frame 4 upward relative to the lower frame 5, a bracket is placed between the upper and lower frames 4 and 5 at the rear of the vacuum packaging operation 1).
After pulling out and inserting the packaging film from the thermoplastic plastic film supported on the holder, the upper frame 4 is lowered relative to the lower frame 5 as shown in Figs. 1 and 2, and polymerized. Clamp the packaging film F with.

Next, as shown in FIGS. 3 and 4, until the packaging film F is clamped, the upper and lower frames 4 and 5 are raised via the arm lever 11 by rotating the operating member 14, and the packaging film F is held in this upper position. Cover plate 2 on guide frame 6.7
When the upper and lower frames 4 and 5 are raised, the horizontal perforated base plate 22, such as a punching plate,
The article to be packaged P placed on the horizontal perforated base plate 22 is inserted onto the horizontal perforated upper wall 3 (inserted directly below the packaging film clamped by the upper and lower frames 4 and 5) and set.

Immediately after that, as shown in FIGS. 1 and 2, the upper and lower frames 4 and 5 of the packaging film F, which has been heated and softened by the quartz tube heater H, are clamped onto the packaged object P on the horizontal perforated base plate 22. At the same time, the packaging film F is suctioned by the negative pressure from the vacuum pump in the negative pressure chamber, and the packaging film F is brought into close contact with the entire upper layer of the packaged object P, and the packaging film F is instantly dropped vertically upward. After completing the vacuum packaging operation of the packaged article P, the upper and lower frames 4 and 5 are raised again to take out the vacuum-packed article P together with the horizontal perforated base plate 22.

This vacuum packaging operation is repeatedly and continuously carried out, and a large amount of items to be packaged can be properly and highly efficiently vacuum packed using a packaging film.

In this invention, the upper and lower frames 4 and 5 for clamping the packaging film F are moved to the guide frame 6 by the arm lever 11.
, 7, a changeover switch SW is connected to the power source AC and is inserted into the electrical path of a quartz tube heater H which heats and softens the packaging film F and which is vertically movable up and down by a lifting member 10 that vertically moves up and down in the guide frame 6. 7, and turn this changeover switch SW ON and OFF.
The actuating member 27 of the changeover switch SW, which automatically opens and closes the electric circuit of the quartz tube heater H by operating F, is mounted on one side of the lower frame 5, which is vertically movable.
Since it is set facing W, the upper and lower frames 4 and 5 are vertically raised and lowered by the vertical movement of the lifting member 10, which is raised and lowered vertically by the arm lever 11, and the upper and lower frames 4 and 5 are clamped to vertically rise and lower. In vacuum packaging work that is performed continuously and repeatedly using a packaging film and a quartz tube heater H that has the property of generating heat in a short time, the lower frame 20 is removed only when the upper and lower frames 4 and 5 that clamp the packaging film are vertically raised. 5
At the same time, the actuating member 27 is properly raised on the vertical line of the changeover switch SW, and the actuation member 27 reliably and automatically turns on the changeover switch SW to close the electric circuit of the quartz tube heater H and close the quartz tube heater H. The tube heater H is brought into a heat generating state in a short time, and the packaging film F vertically raised by the upper and lower frames 4 can be heated and softened in a horizontal state by the quartz tube heater H.

The lower frame 5 is vertically lowered only when the packaging film F in the heat-softened state is vertically lowered at the same time as the vertical dead weight of the upper and lower frames 4 and 5 is lowered by the vertical lowering of the elevating member 10 by the arm lever 11. actuating member 27 of
is reliably lowered on the vertical line of the changeover switch SW, and the changeover switch SW is reliably and automatically turned off by the actuating member 27 to open the electric circuit of the quartz tube heater H, thereby reducing the heat generation state of the quartz tube heater H. Immediately, it is possible to stop radiating superheat to the softened packaging film F and the horizontal perforated base plate which are clamped to the upper and lower frames below.

Therefore, the packaging film in the softened state that vertically descends together with the upper and lower frames 4 and 5 on the horizontal perforated base plate is not overheated by the heat radiation from the quartz tube heater, and maintains the softened state at an appropriate temperature. At this time, the upper and lower frames 4 and 5, the lower horizontal perforated base plate, and the packaged items do not receive any heat radiation from the quartz tube heater H, so the vertically descending packaging film is fused to the upper and lower frames 4 and 5. There is no possibility that the product will be fused to the horizontal perforated base plate (particularly adhesive packaging films have severe fusion properties) and break, causing losses and reducing efficiency that make vacuum packaging of the packaged items impossible. Not only can continuous and constant vacuum packaging work be carried out under appropriate and good conditions, but the quartz tube heater only generates heat when the packaging film is heated and softened, reducing power consumption.
It has great practical benefits such as energy saving benefits.

Furthermore, as a vacuum packaging machine, the number of parts is small due to its structure, assembly work is simple, manufacturing cost is low, handling is simple, and the product can be provided at a relatively low cost.

[Brief explanation of the drawing]

The figures show an embodiment of this invention. Fig. 1 is a perspective view of a vacuum packaging machine implementing this invention, Fig. 2 is the same as above, a perspective view showing the lowering operation of the upper and lower frames, Fig. 4 is the same as above, FIG. 5 is a sectional view of the porous upper wall portion showing the packaging state; FIGS. 6 and 7 show the vertical movement of the upper and lower frames and the related operation with the switch of the electric heater circuit. FIG. 8 is a vertical sectional view of the upper and lower frame portions shown, and FIG. 8 is an electrical wiring diagram of the electric heater. 1... Vacuum crosspiece surface, 2... Small intake hole, 3
...Horizontal upper wall, 4...Top frame, 5...
...Lower frame, 6,7...Guide frame, 10
...Elevating member, 11 ... Arm lever, 13 ... Arm lever, 14 ... Planar cam, 21 ... Covering frame, 26 ...Plate, 27... Operating member, H... Quartz tube heater, F... Packaging film, SW...
...Choice switch.

Claims (1)

[Scope of utility model registration request] A negative pressure chamber for suctioning the air on the horizontal upper wall 3 is installed in the vacuum machine surface 1 in which a large number of small intake holes 2 are provided on the horizontal upper wall 3, and a thermoplastic packaging film F is clamped above. The upper frame 4 and the lower frame 5, which are raised and lowered by
The rear part of this upper frame 4 is pivotally connected to the rear part of the lower frame 5 so that it can be opened and closed,
Furthermore, in a vacuum packaging machine in which a quartz tube heater H for heating and softening the packaging film F is horizontally installed in a covering frame 21 set above these upper and lower frames 4 and 5, a quartz tube heater H for heating and softening the packaging film F is installed vertically on both left and right sides of the vacuum machine surface 1. Guide frame 6 set to
．． The side part of the lower frame 5 is connected to an elevating member 10 fitted vertically to the elevating member 7, and the rear part of a manual arm lever 11 that raises only the elevating member 10 and the upper frame 4 are opened and closed vertically. A manual arm lever 13 for moving the manual arm lever 11.13 is pivotally attached to the front side of the vacuum machine surface 1, and the manual arm lever 11.13
A planar cam 14 that vibrates individually with a time difference is mounted on the front side of the vacuum machine surface 1, and the guide frame 6.
Attach a plate 26 to the plate 26, set a changeover switch SW inserted into the electric circuit of the quartz tube heater H and connected to the power supply AC to this plate 26, and turn on the changeover switch SW.
A vacuum packaging machine characterized in that an actuation member 27 for turning off is set on one side of the lower frame 5, facing the changeover switch SW.