JPH02139307A - Packaging apparatus - Google Patents

Abstract

PURPOSE:To securely position a metal mold and a heater by a method wherein lengthwise movement and swinging of coupling of an actuating arm and a press-fitting frame provided with a heater are allowed in a constant range and the frame is lowered with a guide pin fitted into a hole of a guide post at the time of heat-sealing. CONSTITUTION:A base frame 1 in a shape of a flat box is provided with rubber legs 2 and adjusting legs 3 on four corners of the bottom and with a support plate 4 on the upper surface of a front part with a constant gap, while two metal molds in frame shape are fixed side by side via an insulating block 5. When an actuating arm 20 is lowered with a handle 27 held, a press-fitting frame 31 provided with a heater is also lowered. Then where the press-fitting frame 31 is parallel to (level with) the upper surface of the base frame, a guide pin 40 begins to be fitted into a hole 9 of a guide post 8, and then by pushing down the actuating arm, the press-fitting frame is lowered along the guide post while keeping parallel. Then pressure is uniformed by a compressing spring 32 to permit heat-sealing.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention stores articles such as side dishes, pickles, green foods, and processed marine products in a cup or tray-like container, and places a film on top of the container. The present invention relates to a packaging device that heat-seals a film to the selvage of a container.

[Prior art]

Conventionally, various devices exist for heat-sealing a film to the peripheral edge of a cup or tray-shaped plastic container.

Among them, by manually raising the front lever, the container is placed in the alligator-shaped open space, and after placing the film on the top of the container, the lever is lowered to connect the upper heater to the lower container ear. As a type of welding and cutting by pressing the
There are 9 patent applications such as No. 1983-80005.

[Problem to be solved by the invention]

However, in the device (a) above, the heater is integrally fixed to the rotating main plate that is pivotally supported at the rear end, so the heater approaches the container fixing base more quickly the further back. Since the front side is slower, there is a difference in the degree of adhesion between the front and rear parts of the container opening edge, making it difficult to uniformly seal the film to the container opening edge.

Moreover, the device itself is relatively tall and requires a large amount of space.

In addition, in the device of Eiwa, the electric heating element is moved up and down via a cylinder by the vertical movement of the arm, but in this device, the electric heating plate is integrally provided on the lower surface of the electric heating element, and the electric heating element is When the container holder is raised, the container holder is slid from the front to the lower part and the arm is pulled down, which requires two steps: moving the container holder and operating the arm, which is cumbersome. Furthermore, the device itself is relatively large in size, as described above, and requires a large space.

Furthermore, regarding (c), which the applicant filed earlier,
When the lever is pulled down, the heater suspended from the lever becomes parallel to the top surface of the container holding frame on the base, and then when the lever is pulled down, the heater descends while remaining parallel. It presses against the periphery of the container.

However, even in this device, theoretically the heater should descend parallel to the top surface of the container holding frame (horizontal state), but in reality the rear end of the heater installation plate is pivoted to the block. Eventually, this block is lowered to lower the heater, so sufficient pressure is applied to the rear periphery of the container, but the front periphery is weaker than the rear, and it is evenly applied around the entire periphery of the opening of the container. There was a problem in that it was difficult to obtain a suitable seal.

[Means to solve the problem]

The present invention solves the problems faced by conventional devices, and the first point is that the heater support plate can be moved by a small amount in the front and back direction of the operating arm, and
The heater support plate is rotatably supported to provide flexibility so that uniform pressure can be applied, and guide pins are provided at the four corners of the lower surface of the heater support plate, and guide posts are provided on the corresponding base frame to position the heater. The second key point is that a pipe with a soft vinyl chloride surface is stretched around the outer periphery of the mold that serves as a container mounting base, so that vinyl chloride film, polyethylene film, etc. When sealing a container with a stretch film, if the film is brought into contact with the pipe under a slight tension, the work will be easier because the adhesive force between the two will maintain that state. The third point is that each of the pipes is made to be able to swing outward, and as the heater support plate descends, the pipes are expanded and a film is applied so that they can be sealed without wrinkles. There is a certain point.

That is, the first aspect of the present invention is to provide a frame-shaped mold on the front upper surface of the base frame, install guide posts at the four outer corners of the mold, and install square frame-shaped molds on both sides of the rear upper part of the base frame. Both rear ends of the operating arm are rotatably supported,
The mold can be opened upward at a certain angle from directly above the mold, and the center portions of both sides of the rectangular crimp frame are placed at a position corresponding to the mold on the inner side of the actuating arm, slightly relative to the front and back direction of the actuating arm. A heater support is provided in a movable and rotatable manner, and at the bottom of the crimp frame, a frame-shaped crimp heater corresponding to the mold is provided on the lower surface, and a cut heater or sawtooth cutting tool is provided on the outer periphery of the crimp heater. A plate is provided between the lower surface of the crimp frame so as to be movable up and down via a compression spring, and guide pins that fit into the guide posts are implanted in the four corners of the lower surface of the crimp frame, and a plate is provided between the base frame, the actuating arm, and the heater. A packaging device equipped with a limit switch that communicates with the

The second is a packaging device according to No. 1K above, in which pipes having soft vinyl chloride surfaces are stretched around the front and left and right sides of the mold at approximately the same height as the top surface of the mold. .

Thirdly, in the packaging apparatus according to the above 1, a rotatable pipe is provided in the rear of the mold to extend in the left-right direction, and a pipe whose surface is made of soft vinyl chloride is provided in the front to extend in the left-right direction. Pipes with soft vinyl chloride surfaces are provided on the left and right sides of the mold, extending in the front-rear direction, and both the left and right pipes can swing outward, respectively.On the other hand, on the bottom surface of the crimp frame, A packaging in which an inclined plate is installed at a position corresponding to the pipes, the left and right pipes are opened outward as the crimp frame is lowered, and the film supported on the four pipes is stretched and sealed. Device.

Fourthly, in the packaging device according to any one of the first to third aspects, an auxiliary arm is provided at the rear end of the operating arm facing downward, and the lower end of the auxiliary arm is always pulled forward by a tension coil spring. A packaging device with a stopper at the front.

Fifth, in the packaging device according to any one of items 1 to 4 of 011, a roll-shaped film is rotatably supported on the rear upper surface of the base frame, and the film can be pulled out from the front of the device as necessary. .

A sixth aspect of the present invention is a packaging apparatus according to any one of the first to fifth aspects, in which a window is provided at a position corresponding to the mold of the crimp frame and the heater support plate.

〔Example〕 Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figure 1 [b], ■ is a flat box-shaped base frame with rubber legs ■ and adjustment legs ■ provided at the four corners of the lower surface, and a support plate ■ provided with a certain gap on the front upper surface. Two frame-shaped full molds (■) are fixed side by side on top with an insulating block (■) interposed therebetween. This mold has a shape and width on which the opening periphery, ie, the ear, of a cup-shaped or tray-shaped plastics container (2) can be placed.

■ are guide posts planted at the four outer corners of the mold,
A hole ■ is provided in the center. [Phase] is a guide pipe that is provided behind the rear guide post and extends in the left-right direction, and is freely rotatable. ■ is also a fixed pipe installed in front of the front guide post in the left and right direction, and its surface is covered with a soft vinyl chloride tube that has good adhesion to stretch film A/M made of vinyl chloride, polyethylene, etc. It is something that

2 is a tension pipe installed inside each of the left and right guide posts in the front-rear direction, and this pipe is also covered with a soft vinyl chloride tube similar to the above, and both ends of the pipe are shown in Figure 2. L-shaped support bracket [phase] as shown in
It is supported so that it can expand only outwardly, and is normally biased inwardly by a tension coil spring (2). It should be noted that the coating material for the above-mentioned pipe is selected from a material with better adhesion than the material of the film (2). The height of each pipe of these [phase] ■@ is set at a position slightly higher than the upper surface of the mold ■.

[Phase] is a limit switch provided on the rear side of the guide pipe [Phase] via a stand [Phase], and is activated by the lowering of an operating arm, which will be described later, to heat the heater.

■ [Phase] is a bearing plate [Phase] on the rear upper part of the base frame.
This is a support roller rotatably supported by a support roller, on which a roll-shaped film [F] is placed so as to be transferable.

[Phase] is an operating arm formed in the shape of a rectangular frame (see Figure 3) with a square pipe, both rear ends of which are rotatably supported on both rear sides of the base frame, and the front end The upper surface of the base frame opens and closes in a crocodile-like manner as shown by the two-dot chain line in FIG. This actuating arm [phase]
A bearing [phase] having a slightly elongated hole [phase] in the front-rear direction is provided on both sides of the frame, and a steady rest pin [phase] is provided in the center front of the horizontal crosspiece [phase] at the rear of the frame. A handle (■) is provided on the horizontal bar at the front end. [Phase] is an auxiliary arm fixed downward to the rear end of the operating arm.
It is installed through the upper surface of the base frame, and its lower end is constantly pulled forward with a bow tension coil spring [phase].
The opening position of the operating arm is regulated by the stopper (■).

[Phase] is a crimp frame placed within the frame of the actuating arm, and a heater support frame [Phase] is provided at four locations on the lower surface of the frame so as to be movable up and down via compression springs [Phase]. On the lower surface, a frame-shaped film pressure bonding heater [phase] and a cut heater [phase] are provided inside and outside at positions corresponding to the mold (2). Note that a serrated cutting tool may be used instead of this cut heater. A support pin [phase] is provided on both sides of the center of the crimp frame [phase], and a vertically long elongated hole [phase] is provided at the rear center, so that the support pin can be connected to both sides of the operating frame. At the same time, the elongated hole (phase) is fitted into the steady stop pin (phase) of the operating arm, allowing only a certain amount of back and forth movement and left/right rocking of the crimp frame. Then, a leaf spring [phase] is brought into pressure contact with the lower surface of the crimp plate from the lower part of the horizontal bar 0, and the steady rest pin [phase] is normally in contact with the lower end of the elongated hole [phase]. . In addition, guide pins with slightly pointed tips are implanted in the four corners of the lower surface of the crimp frame at positions corresponding to the guide posts (■), so that when the crimp plate descends and approaches the mold, The guide pin fits into the hole (■) of the guide post (■) and is regulated to ensure forced horizontal descent.

■ is an inclined plate installed on both sides of the lower surface of the crimping frame in the front-rear direction as shown in Figure 2.It is placed corresponding to the upper part of the tension pipe @, and by lowering the inclined plate, both left and right tension pipes are ＠ヲIt is something that expands outward.

Further, the central part of the crimp frame [phase] and the heater support plate [phase] provided on the lower surface thereof, that is, the part surrounded by the film crimp heater, is punched out into a hollow shape to form a window @@, respectively. This allows items to be loaded even when they are raised above the top of the container (2), and also allows the condition of the film and the items inside the container to be seen when sealing (if a transparent film is used). However, this window is not always necessary.

@ is a film case provided at the rear end of the upper surface of the base frame, and a removable cover is provided at the front of the upper part.

The above-mentioned shape and groove structure shown in the drawings are just one specific example. For example, if a stretch film is not used, pipes on both sides of the mold are not necessary, and a cut film may be used. In some cases, the rear support rollers,
No cases, covers, etc. are required. Further, as for the means for automatically returning the operating arm, a coiled spring may be used instead of using the auxiliary arm.

[For production]

Normally, the operating arm (phase) is raised as shown by the chain line in FIG. In this state, put the item in the container ■, place it on the mold ■, pull out the rolled stretch film ■ from the rear, slide it over the guide pipe [phase], and bring it to the front of the fixed pipe ■. When the film is pulled and then pressed against the fixing pipe ■, it will be temporarily fixed by its self-adhesive force. At the same time, the film is temporarily fixed to the tension pipes @[phase] provided on both sides by self-adhesive force, so even if you take your hands off the film, the film remains in the container as shown in Figures 1 and 2. Maintain an upward tension.

Next, when the operating arm ■ is pulled down using the handle [phase], the crimp frame ■ equipped with a heater is also lowered, and the crimp frame {phase} is in the state shown in FIGS. 1 and 2.
The guide pin [phase] starts to fit into the hole ■ of the guide post ■ at the position where it is parallel to the top surface of the pace frame (horizontal state), and then by pushing down the actuating arm, the crimp frame keeps parallel along the guide post. Go down. During this process, the limit switch [phase] is activated to energize the film crimping heater [phase], and the inclined plate @ comes into contact with the tension pipe [phase] to spread the film and stretch it. When the actuating arm is pushed down to the rear, the film crimping heater [phase] presses against the container's selvedge, and the subsequent pressure is equalized by the compression spring [phase], and at the same time as heat sealing, the cut heater [phase] is energized, and the film is The packaging is completed by cutting along the outer periphery of the container's rim.

After that, if you pull up the actuating arm a little and let go of the handle at the position shown in Figure 1, where the guide pin is almost removed from the guide post, the actuating arm will rise to its original position under the action of the tension coil spring [phase]. The auxiliary arm [phase] stops at the position where it contacts the stopper ■.

These series of sealing conditions can be confirmed through the window provided in the center of the crimp frame and the heater support plate, so that any breaks in the film can be immediately detected.

In addition, it can be used even when the loaded item protrudes from the top of the container, and in the case of stretch film, it is temporarily fixed with pipes on all four sides, and when heat-sealing, it can be further tightened and sealed by the action of the tension pipe.
The sheet film will have no sagging or wrinkles.

On the other hand, in the case of sealing with a hard film, heat sealing and cutting can be performed by pulling out the film from the roll or placing the cut sheet film on the top of the container and pulling down the operating arm in the same manner as described above. In this case, at least the pipes covered with soft vinyl chloride tubes on the front and left and right sides are unnecessary.

〔Effect of the invention〕

As mentioned above, the present invention is a device with a simple structure and small bulk,
When heat sealing with a stretch film made of vinyl chloride or polyethylene, it is possible to temporarily fix the film (with a pipe covered with a vinyl chloride tube placed around the mold) or to stretch the film by expanding it, giving it a good appearance. A packaged product is obtained.

In addition, the connection between the actuating arm and the crimping frame equipped with a heater can be moved back and forth within a certain range, and can also be oscillated, so that the guide pin fits into the hole in the guide post and descends during heat sealing. Since the mold and heater can be reliably aligned and parallelism can be maintained, the film can be sealed uniformly and accurately to the container rim.

Therefore, it is extremely convenient to be installed at a retail store and to package goods on the spot according to the requests of purchasers.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a vertical side view at the center of the mold, and FIG. 2 is a vertical front view.
A part of the right end shows the arrangement at the rear of the device, which has a symmetrical structure except for the limit switch. FIG. 3 is a plan view with the rear cover removed, and due to bilateral symmetry, the right side of the front half is shown with the operating arm and crimp frame removed. FIG. 4 is a perspective view of the device. 1. Hess yV-me 4. Support plate s, block 6, gold
Type 8. Guide post 9. Hole 10, guide pipe 11. Fixed pipe 12, tension pipe
18° L-shaped support fitting 15, limit switch 17.
18. Support roller 20, actuation arm 22. Long hole 25. Steady rest pin 28, auxiliary arm 30.
Stopper 81. Crimp frame 85, heater support plate
36. Crimp heater 37. Cut heater 38, support pin 39. Long hole 34. Leaf spring 40, guide pin 41. Slanted plate 42.4B, window 44, film case 45. cover

Claims (1)

[Claims] 1. A frame-shaped mold is provided on the front upper surface of the base frame, and guide posts are installed at the four outer corners of the mold, and rectangular frame-shaped molds are installed on both sides of the rear upper part of the base frame. Both rear ends of the actuating arm are rotatably supported on a shaft so that it can be opened upward at a certain angle from directly above the mold, and a rectangular shape is installed at a position corresponding to the mold on the inner side of the actuating arm. The center portions of both sides of the crimping frame are supported so as to be movable and rotatable a little in the front and back direction of the actuating arm, and a frame-shaped crimping heater corresponding to the mold is attached to the lower part of the crimping frame. A heater support plate equipped with a cut heater or a serrated cutting tool on the outer periphery thereof is provided between the lower surface of the crimping frame so as to be movable up and down via a compression spring, and the four corners of the lower surface of the crimping frame are fitted into the guide posts. A packaging device comprising a guide pin planted therein and a limit switch communicating with a heater between the base frame and the actuating arm. 2. The packaging apparatus according to claim 1, wherein a pipe having a surface made of soft vinyl chloride is stretched around the front part and both left and right sides of the mold at approximately the same height as the upper surface of the mold. 3. In the packaging apparatus according to claim 1, a rotatable pipe is provided at the rear of the mold, extending from side to side, and a pipe whose surface is made of soft vinyl chloride is provided at the front, extending from side to side. On the left and right sides of the crimping frame, pipes with soft vinyl chloride surfaces are installed to extend in the front and back direction, and both the left and right pipes are able to swing outward, respectively. A packaging device in which an inclined plate is provided at a position corresponding to the crimping frame, the left and right pipes are opened outward as the crimp frame is lowered, and the film supported on the four pipes is sealed in a stretched state. 4. In the packaging device according to any one of claims 1 to 3, an auxiliary arm is provided at the rear end of the operating arm so as to face downward, and the lower end of the auxiliary arm is always pulled forward by a tension coil spring. A packaging device equipped with a stopper. 5. The packaging device according to any one of claims 1 to 4, wherein a roll-shaped film is rotatably supported on the rear upper surface of the base frame, and the film can be pulled out from the front of the device as necessary. 6. The packaging device according to any one of claims 1 to 5, wherein a window is provided at a position corresponding to the mold of the crimp frame and the heater support plate.