JPH0123935Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a packaging device for tray-packed items. It is an object of the present invention to provide a packaging device equipped with a packaging surface expansion/contraction mechanism that can expand and contract the packaging surface.

[Conventional technology]

In recent years, in supermarkets, etc., packaging products in which fish, meat, vegetables, etc. are placed in trays and covered with stretch film have been widely used, but this type of packaging is suitable for trays of any size. Wrap a packaging film with a certain width around the entire tray.
Most of the films are overlapped at the bottom of the tray and sealed by the self-adhesive properties of the film.

[Problems to be solved by the invention] Therefore, since the packaging film is wrapped around the entire tray, the amount of film used is large, which is not only uneconomical, but also the film is overlapped on the bottom of the tray, making the packaging form unusable. It spoiled the beauty.

The present invention was developed in view of the above problems, and provides a packaging device that covers and wraps only the opening of a tray with a stretch film, and also allows the packaging surface to be expanded or contracted to suit trays of various sizes. It is an object of the present invention to provide a packaging device for tray-plated products having a packaging surface adjustment device that can adjust the packaging surface.

[Means to solve the problem]

That is, the packaging device for tray-plated products according to the present invention is as follows:
In a packaging device for tray-plated products, a film holding frame with a thin synthetic resin film such as stretch film stretched over it falls onto the opening surface of a tray placed on a tray mounting section, and the thin film is stretched and covered over the opening surface of the tray. and the tray mounting portion constitutes a tray mounting recess by four movable frames surrounded in a rectangular shape on the base surface, and
Each movable frame is pivotally supported so as to move parallel to the base surface, and the upper edge of each movable frame is rotated around the outer circumference, and the remaining end is wound around the winding mechanism and tensioned. The gist of the present invention is to have a tray placement surface expansion/contraction adjustment mechanism which is provided with a band-shaped heating element.

[Effect]

Therefore, the frame members forming the tray placement recesses are configured to be adjusted forward and backward in the plane direction, and a band-shaped heating element is provided around the outer periphery of the frame member so that the heating element is slightly smaller than the edge periphery of the tray in use. The ends of the stretch film are melted and cut with a wide area covered, allowing it to be used with trays of various sizes, eliminating the need to wrap the packaging film around the entire tray, and resulting in an excellent packaging form. be.

〔Example〕

Hereinafter, one embodiment of the packaging device for tray-plated products of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the entire device, and FIG. 2 is a front sectional view thereof.

A slit-shaped film guide hole 2 is bored approximately in the center of the base 1, through which the stretch film a is inserted upward from the bottom of the base 1, and a packaging surface adjusting hole is provided in front of the film guide hole 2. A tray mounting section 3 having a device is constructed.

A film accommodating section 4 is constructed at the bottom of the base 1, and two film receiving rollers 5, 5 are rotatably installed in parallel with each other between support brackets erected on the underside of the base 1. A film guide roller 6 is pivotally installed below the film guide hole 2, and a stretch film a is fed out from a stretch film roll a' wound on the film receiving rollers 5, 5. The film is configured to be guided out from the film guide hole 2 via the film guide roller 6.

The tray mounting section 3 is formed by four movable frames 8, 8, 8, 8, each slidably mounted on the base 1, and a tray mounting recess 9 consisting of a rectangular surrounding frame.
, and each of the moving frames 8, 8, 8,
bearing members 11, 11, 11, 11 in which sliding shafts 10, 10, 10, 10 protruding from 8 are fixed to the base 1;
The moving frame 8 is supported so as to be able to move in parallel along the surface of the base 1.

Each inner edge 7, 7 of each of the above-mentioned moving frames 8, 8, 8, 8,
A flexible band-shaped heating element 12 that goes around the outer periphery of 7, 7 is fixed at one end, and a winding mechanism 13 is fixed at the other end.
It is provided in a wound state, and electricity is supplied to both ends to heat it.

The band-shaped heating element 12 is made by winding a linear heating material such as nichrome wire around a glass fiber string and covering the outer periphery with a heat-resistant resin such as Teflon resin. Support shaft 1 protruding from stand 1
The winding drum 15, which is rotatably mounted relative to the frame 4, is always elastically biased in the winding direction by a spiral spring, and the excess length of the band-shaped heating element 12 that is wound around the movable frame 8, 8, 8, 8 is It is made by constantly involving the sabu and twisting it nervously.

Further, 17 indicates the film guide hole 2 and the moving frame 8.
This is a film cutter blade with a blade fixed upward to the base 1 so as to be located between the two.

Reference numeral 18 denotes a film heating coating device provided on the rear side of the film guide hole 2, and a film presser frame 21 with one end rotatably pivoted to the lower part of the guide brackets 19 and 19 via a pivot 20 is attached to the tray. As well as being placed upside down on part 3,
An angle α with respect to the front end frame of the film presser frame 21
A handle 24 is provided protruding from a hook member 23 pivotally connected via a hinge mechanism 22 so as to be tiltable, and a hook end 23a of the hook member 23 is attached to the base 1.
The upper end of the pillar 25 erected on the handle 20
It becomes engaged or released by tilting the. Further, the front end of the film presser frame 21 has a rectangular frame shape that falls to the outside of the frame body of the tray mounting section 3, and a front end of the film presser frame 21 has a rectangular frame shape that falls to the outside of the frame body of the tray mounting section 3. Thermal plate 2 has a built-in heater that maintains an appropriate temperature at all times.
6 will be located.

The guide brackets 19, 19 are configured to be slightly longer than the film holding frame 21, and have guide holes 27, 27 bored from near the lower end to the upper end, and have hook-shaped locking holes 27a, 27a at the upper end. In addition, a film feed rod 28 is slidably installed between both guide holes 27, 27, and handles 28a, 28a are fixed to both ends of the film feed rod 28. A film holder 29 which comes into contact with the film feed rod 28 at the lower end position is fixed between the film guide hole 2 of the machine stand 1 and the film cutter blade 17.

The outer periphery of the film feed rod 28 is coated with a film adhesive using an adhesive tape or the like, and the film holder 29 is coated with a film non-adhesive material or the like.

Further, 30 is a film presser rod installed horizontally between the bases of the film presser frame 21.
When the film holding frame 17 is turned sideways, the film holder 29 and the film cutter are positioned between the film holder 29 and the film cutter 17, and when the film presser frame 17 is turned sideways, a part of the frame body touches the switch mechanism 31 provided on the top surface of the base 1. When turned ON, the band-shaped heating element 12 is heated by electricity.

The packaging device configured as described above uses tray b
First, the packaging surface adjustment mechanism A is expanded or contracted according to the size of the bearing members 11, 11, 11, 1.
The position of the sliding shafts 10, 10, 10, 10 with respect to 1 can be turned to the right by a thousand degrees, and the interval between the moving frames 8, 8, 8, 8 can be widened or narrowed to match the width of the tray b.

After adjusting the packaging surface adjustment mechanism A, first pull up the film presser frame 21 to lock and secure the hook member 23 to the support column 25, and then move the film feed rod 28 along the guide holes 27, 27 to the locking hole portion 27a. , raised to 27a.

As a result of this lifting, the stretch film a, which had been sandwiched between the film holder 29 and the film feed rod 28, is pulled with its end attached to the film feed rod 28, and the film guide hole 2 The stretch film roll a' in the film storage section 4 is fed out via the film guide roller 6, and is adjusted to the front of the film holding frame 21, and the stretch film a is heated by the heating plate 26. and the tackiness is increased. When the handle 20 is tilted forward in this state, the hooked end 23a of the hook member 23 comes off from the column 25, and
The stretch film a stretched on the front surface of the film holding frame 21 is laid down on the tray mounting section 3, and at the same time the switch mechanism 31 is turned on.

Therefore, the stretch film a placed on the upper surface of the tray b is cut at the film cutter blade 17 position and separated from the film supply side, and at the same time, the stretch film a on the periphery of the tray b that is in contact with the band-shaped heating element 12 is cut off. The stretch film a is fused and the peripheral portion of the stretch film a adheres to the side wall of the tray b, covering the opening surface of the tray b.

Next, the film presser frame 21 is raised again, engaged and locked, and the film feeding rod 28 is pulled up, and the next stretch film a is fed out from the film accommodating section 4, completing the preparation for the next wrapping. Through repeated operations, trays of various sizes a
Materials to be packaged housed in the container can now be wrapped in film.

In the above-mentioned embodiment, the film guide hole 2 of the film lead-out portion is located between the film holder 29 and the film cutter blade 17, but the film guide hole 2 is located between the film holder 29 and the film cutter blade 17 as shown in FIG. 29, the stretch film a can be held between the film feed rod 28 and the film holder 29, as in the previous embodiment.

[Effect of idea]

As described above, according to the packaging surface tensioning device of the packaging device of the present invention, the frame members forming the tray placement recesses are configured to move forward and backward in the surface direction, and the outer periphery of the frame members is A band-shaped heating element is provided around the edge of the stretch film, which is slightly wider than the edge of the tray being used, and is melted to melt the edge of the stretch film.This allows the use of trays of various sizes, and allows for easy operation of the film for placing items on trays. The present invention has the feature of being able to be packaged, and the practical effects of the present invention are extremely large.

[Brief explanation of the drawing]

The drawings show an embodiment of the packaging device for tray-plated products according to the present invention, in which Fig. 1 is a perspective view of the whole, Fig. 2 is a sectional view of the same side, Fig. 3 is a perspective view of the main part, and Figs. FIG. 6 is an explanatory view showing the wrapping operation, and FIG. 7 is a longitudinal cross-sectional view of a main part showing another embodiment of the film lead-out section. DESCRIPTION OF SYMBOLS 1... Base, 3... Tray placement part, 4... Film storage part, 8... Moving frame, 9... Tray placement recess, 10... Sliding shaft, 11... Bearing member, 12...
... Strip heating element, 13 ... Winding mechanism, 14 ... Support shaft, 15 ... Winding drum, 16 ... Spiral spring, 1
7... Film cutter blade, 18... Heat coating device, 19... Guide bracket, 20... Handle, 21... Film presser frame, 25... Support column, 2
6...Hot plate, 27...Guide hole, 28...Film feed rod, 31...Switch mechanism, a...Stretch film, b...Tray.

Claims (1)

[Scope of utility model registration request] In a packaging device for tray-plated products, a film holding frame with a synthetic resin thin film such as stretch film stretched over it falls onto the opening surface of a tray placed on a tray mounting section, and the thin film is stretched and covered over the opening surface of the tray. The tray mounting section includes four movable frames surrounded by a rectangular shape on the base surface to form a tray mounting recess, and each movable frame is pivotally supported so as to move in parallel in the direction of the base surface. A tray placement surface expansion/contraction adjustment mechanism is provided, which is provided with a band-shaped heating element that goes around the outer periphery of the upper edge of each of the moving frames, and the remaining end is wound and tensioned around the winding mechanism. A packaging device for tray-plated products, characterized by having the following.