JPS63152510A - Stretch-packaging method and device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method and apparatus for wrapping articles or assemblies of articles.

In the past, there have been three common ways to wrap items or assemblies of items with plastic film wrappers. These methods include shrinkage method C (where a large bag is wrapped around the item using heat), nakaashi wrapping method (where a plastic elastic bandage is wrapped around the item), and Okiwa (where a plastic elastic bandage is wrapped around the item). The shrinking method (where a small sized plastic tube is passed around the item and then released from the tensioner, thereby causing the tube to shrink tightly to the item).

Experience has taught us that all of the above methods have operational drawbacks, and this invention has been invented to overcome most of these drawbacks. The method of this invention is a heatless procedure, which has some degree of elasticity, unlike the stretch wrap method and the stretch wrap method, which require plastic films with special properties. You can use sleeves or bags made of plastic film material with. The equipment required to carry out the wrapping method of the invention is economical to make, easy to maintain, and movable so that the load K to be wrapped can be moved. In the known heatless wrapping method, the package to be wrapped must be moved to a specifically located packaging machine, such as a forklift truck or similar.

This release ψ1 is therefore the process of placing around the entire load of elastically extensible sheet material having a length greater than the circumference of the article or group of articles, hereinafter referred to as the load, and thus having an extra length. , the process of applying force to the excess material in order to pull the material around the baggage in order to attach it to the baggage by scooping up the excess material, and the process of hugging the baggage with the panel when releasing the force. It may be said that a method of wrapping a load is provided by the process of forming a fastening section adjacent to the load between panels extending from the load to the stack such that the tension remains undiminished. .

Several currently preferred versions of the method and apparatus of the invention will now be described with reference to the accompanying drawings.

The machine illustrated in Figure 1 is to be considered as illustrating the prototype machine proposed for carrying out the method of the invention.

FIG. 7 shows a rectangular luggage carrier and a towing and sealing machine/i which may be of the type shown in FIGS. The proposed machine has a base with a cut-out front part 3 for receiving the nook of the load. There is a tension D34' and a mast S rising from the base. The arm 6 is provided so as to be freely rotatable around the mast jK. Arm 6 supports the sealing bar. The tensioning shaft hq is movable toward and away from the mast s, as illustrated by the arrow.

The plan view diagram shows a sleeve or bag g of plastic film larger than the luggage carrier around and over the luggage carrier and stretched around the tension 11 (F)K.

Third. The diagram is number 1. This is a top view of the movable part shown in Fig. 1, which shows that the cargo load is supported on the pallet 9, accommodated in the notch 3 of the base part, and that the tension It is the corner of the pallet 9 that has the pointed top io. In order to be able to push down the furnace part of the bag ferns together with the tension ferns in the bag g into the load T, (Dyi part), it is necessary to pinch the end of the bag S, and for this purpose For this reason, a flattened top 10f is provided for tension J14.

It is worth noting that the height of the tension be << and the height of the mast S and the sealing bar is higher than the height of the load B, the proposed device seems to be able to be used with it with an optimum load approximately equal to but higher than the maximum load. It has a high degree of In fact, the height of the cargo on the pallet rarely exceeds 2 m, and for most purposes the heights of the puller, mast S, and sealing shelving should be of the same order of magnitude. The number of arms required to support the sealing bar is approximately equal to the length of the sealing bar. Figures ν'5 to g illustrate the process of wrapping the baggage according to the presently preferred method. , for example, by means of a threaded member rotatably provided in the base λ that engages in a nut at the lower end of a tension bead that can slide in a track in the base 3. Move the tension DIfp4A towards the mast 5 in order to absorb and reduce the elongation of the small 14 in the wall of the bag (see Figure 5). An arm 6 is rotatably mounted on the mast s for moving together the unthreaded sealing rod to the relative position shown in FIG.

FIG. 7 illustrates the situation in which the bag is tensioned by another movement of the tensioner 1 towards the mast 5. So close to the luggage,
Due to the provision of a sexually tied protective plastic film cover, an enlargement of the plastic pin can be obtained. The sealing area serves to keep the plastic film sections in close proximity and fixed together in preparation for the sealing process. The seal can act as a catch to prevent movement of the load onto the pallet when the bag is stretched and stretched.

Figure S illustrates the sealing process in which an electrically heated element in one of the tension shells is momentarily powered to approximate the outer tension and heat seal the two panels of plastic together. FIG.

In another program, the cutting process as shown in Figure S is continued until the desired cutting edge is added to the plastic, and then the process in Figure S is repeated to eliminate the steps in Figures 6 and 7. conduct.

Figure 10 shows the cutting of the surplus plastic l- from the plastic wrapped in the mukamono and the cutting of the tight part ii using the tight stabbing rod 7.
FIG.

The cutting of the excess plastic at the rear of the seal // after the formation of the seal 1/ can be accomplished in many ways, for example by an operator using a knife. To achieve this, the seal 7 preferably incorporates a knife or other device.

tlEii-ia figure is t)+i~10 about figure 11
The enveloping process of Figure 1/-10 as carried out with two loadings of the type described will now be illustrated. This arrangement provides a balance B to the longitudinal forces applied during the plastic tensile process. It will be appreciated that the wrapping, tensioning and sealing operations of the two devices shown can be performed by two operators or by suitable mechanical controls. Similarly, the operation of a single device for carrying out the steps of planes 1-10 can be mechanically controlled. The I-drive//-i diagram arrangement is adapted for use with a conveyor that moves the items to be packaged from a manufacturing area to a clean-up area or storage area. The conveyor is moved intermittently to allow for down time for wrapping operations. The movement of the conveyor and the working order of the equipment can be centrally controlled semi-automatically or fully automatically.

With particular reference to Figure 5, which illustrates the prototype machine used for the above-described wrapping method, the load positioning cut 3 is designed to wrap the loaded pallet at the location where the loading of the pallet occurs.
wheels so that it can be moved from here to there
It ends with two arms 13 each provided with a da. This percentage is
To eliminate the need for handling framed pallets during the wrapping process using forklift trucks. This advantage is readily apparent from the drawbacks of the currently known swamp and swamp and sew techniques. The mast 5 supports a holder for rolls of plastic film, either sleeve-shaped or molded, if the load is supported above the surface, for example on a low stand of dimensions smaller than a pallet, and the plastic wrapper is can be placed below the pallet to connect the load to the pallet.

Possible ways of carrying out some of the functions of the proposed machine will be explained below. For example, a swingable arm 6 is divided into two upright bodies 11. (ν, 15.lb shown in the figure) and connect the upright body 16 to the kidney seal via link/99.
, so that the parallel link 1 causes the dense M rod 7 to move diagonally in the direction of the plastic.

As a variation to the seal, the bag's lli' is designed to maintain a tight hug of plastic around the luggage compartment.
All application devices, staples or clips, can be used to fasten the parts together. Movement of the sealing rod can be controlled by a manual linkage or by a power unit. Regardless of the precision @ equipment used, the order of work is calculated/-/
This is similar to that described above for Figure 0.

Other forms of the invention, such as the movement of the tension 1, are a matter of gradual design and may use any suitable device Bt, such as the threaded member described above.

The threaded member can be rotated manually or mechanically as desired. The base of the tension generator is easily but forcefully pulled in the direction of the base, 11! It corresponds to the trajectory of the movement within the base, which can be scraped. The physical strength of securing the base of the pull bar to the track and holding it is such that it can be used as a lever to pull at its unsupported upper end during bag pulling. It is a matter of mechanical design and not an inventive form of the device of this invention.

The above explanation is based on the idea of ``the pull of a person who cannot groan.'' In the modification, referring to Fig. 17, which is a top view of Mastco O with miso holes, together with the plastic film g inserted into the miso size, it is possible to achieve more elongation than K by rotating the member with miso holes. can. After positioning the slotted member to provide a throat through which the bag can be moved during the tensioning operation (see Figure 118),
A number of turns (see diagram Pi) applied to the mast λ0 are sufficient to obtain the required elongation in the plastic around the payload, after which fixation is obtained by heat sealing or by clip pairs or by staples. .

Many arrangements may be devised for the rotation of the mastco O, for example a worm gear arrangement may be provided or ratchet arrangements of known types may be used.
These devices, as soon as the force required to rotate the mast 20 is interrupted once, either by the action of a ratchet or by the irreversible nature of the worm-worm gear system, the tension rod is moved into the bag. to be maintained. The rotation of the mast can be obtained mechanically or manually. Enough to then cut the plastic on the mast 20 around the item after fixing the plastic! You can rewind the story.

In another version, the sleeve of plastic film can be replaced by a strip of plastic film, and both ends of the strip can be introduced into the Mastco O. The procedure can be carried out as soon as the mast has been wrapped once or twice to provide a plastic handle on the mast.

The disadvantage of this arrangement is that the bag automatically provides end covers for the load. However, it is better to use a strip as suggested by placing a sheet of plastic film on the top of the luggage so that it hangs down onto the top of the luggage, and then the entire cover can be provided as before. , nII can eliminate the drawbacks of the lid.

The sealing crumb can be moved continuously during heat sealing operations or during other operations. An example is that one body sealing rod can be moved to its final innermost position, the other sealing rod can be moved to an initial position closely adjacent to the vl seal, and then After applying the elongation to the entire plastic, a small final movement of the sealing rod towards the sealing rod can be made, thereby definitively fixing the plastic.

It should be noted that the above description used a loaded pallet as an illustrative example. In practice, there are very small limitations on the nature of the baggage that can be wrapped by the described device and by this method of deployment.

Pallets loaded with many items),,! Stacked paper boxes or other similar packages on a platform or other support can be wrapped if large enough bags or large enough strips of plastic film are available. nT mounted, for example, on a movable support, for example a forklift truck.
By using a device or devices such as those described in Section I, packages of cargo on top of trucks can be easily 3&balled. For this reason, the invention should not be seen as being limited to the application or type of device as described above, but should be seen as offering novel ideas in its packaging.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view of a machine for carrying out the method of the invention; additional details are illustrated in Figure ttxIs. The diagram is similar to Figure 1, which shows the luggage together with the loosely wrapped bag. Figure #'3 is a side view of the arrangement shown in Figure 11. The second figure is a view on f11 of the arrangement shown in FIG. 2. Figure lls illustrates the first step in the wrapping operation using equipment such as that illustrated in yl. Figure 6 illustrates another preparatory step during the wrapping operation. FIG. 7 illustrates the stretching process of the wrapping operation. The S diagram illustrates the sealing process of the wrapping operation. FIG. 9 illustrates the cutting process of the wrapping operation. FIG. 10 illustrates the final step of the wrapping operation. H: i Figure 1 illustrates a double arrangement for wrapping operations. Figure 72 illustrates the placement of the bag on a load in preparation for double-layout use. Figure F73 illustrates the towing process. The first diagram illustrates the sealing and cutting process using a double arrangement. Figure 1S is a schematic top view of a device similar to Group 11, but incorporating a different type of seal support. Figure 16 is a front view of the device of Figure 175. Figure 77 illustrates one way to engage a plastic bag into a stretching force application device. FIG. 1S illustrates the operation of the apparatus of FIG. 1 during use. Figure 79 illustrates another step in the use of the apparatus of Figure 77. In the figure l: Enlarger/sealer 2 base J: I! 'i Part Mite tension shield 5: Mast 6: Armrest: Sealing rod Tail 9 Figure 10 Ward Tail 11 Figure 12 Figure 13 Tail 14 Figure 15 Procedure amendment (method) % formula % 1, incident Indication of 1986 Patent Application No. 293579 2, Name of the invention Stretch wrapping method and device 3, Name of the person making the amendment: Resois 2P Stefan Karbisek 4, Agent

Claims (1)

Claims: Placing a panel of elastically extensible sheet material around the load having a length greater than the perimeter of the load without creating excess material, so as to form a tight hugging engagement with the load; the process of applying a force to the excess material to pull the material around the load, and of the portion of the panel extending from the load to the storage area such that when the force is released, the tightness of the binding of the load by the panels remains undiminished. A method of wrapping an item or group of items called a baggage by forming an intervening fixing part adjacent to the baggage. 2. Pulling excess material by force through a guide device adjacent to the load to place the parts of the panel in close proximity in preparation for the fixing process. the method of. 3. The method according to claim 1 or 2, wherein the force is applied linearly away from the load. 4. A method according to claim 1 or 2, in which the force is applied by wrapping excess material around the rotatable member. 5. A base, a load positioning device thereon, to the base. a tensioning device movable on the base and adapted to grasp excess wrapping material as it is passed around the package once; and pulling the excess wrapping material grasped by the tensioning device through the tensioning device. in an elastically extensible sheet material which is movable between an inoperative position for securing the wrapping material and an operative position for securing the wrapping material and having a securing device provided at the base between the load positioning device and the tensioning device. A device for wrapping an item or group of items called luggage.