JPH1111435A - Packing method of housing unit and packing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pack easily and securely a housing unit by heat-sealing transparent or translucent heat-shrinkable sheets packed in advance to form a bag and a packing sheet, covering a housing unit therewith, and shrinking it with heat. SOLUTION: Two sheets of transparent or translucent heat-shrinkable sheet 10A, which have a strength and thickness hardly broken due to projections or friction, and through which the inside condition can be confirmed when they are put on a housing unit U, are formed to have a rectangular shape corresponding to the size and shape of the housing unit U to be packed. These two heat-shrinkable sheets 10A are superposed with each other, the three sides 11, 12, 13 are welded, and the rest one side is opened to form an opening 15 and obtain a packing sheet 10. On packing the housing unit, the opening is opened downward to cover the housing unit U, and both ends 16 of the sheet 10 are folded to form a triangular shape and bent downward. After it has been fixed by a tape when it is required, the surface of the packing sheet is heated to closely stick it by heat-shrink in the same surface shape of as the housing unit U.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing method and a packing structure for protecting a housing unit from wind, rain, dust and the like during storage and transportation of the housing unit.

[0002]

2. Description of the Related Art As one type of prefabricated house, a unit house using a substantially rectangular housing unit is provided.
The housing units are manufactured in advance in a factory, transported to a construction site by truck, and a required number of housing units are juxtaposed and stacked using a crane to construct a unit house. The housing units produced in the factory are covered with a packing sheet made of tent sheet or the like in order to protect them from wind, rain, dust, etc. during the time from manufacture to stacking and stacking at the building site and during transportation. . This packing sheet is repeatedly used because of its high manufacturing cost, and after unpacking at the construction site, one of the trucks transporting the housing unit collects the used packing sheet and returns it.

[0003] By the way, when housing units are shipped to remote islands or overseas, they are mainly shipped by sea. For this reason, there is a problem that not only the collection of the packing sheet becomes difficult and the cost increases, but also a management system for collecting and reusing the sheet becomes complicated. Further, the conventional packing sheet tends to be strict in packing because it has durability to withstand repeated use, or a belt stopper is used to prevent the sheet from being turned up by wind or the like. Therefore, when the housing unit is damaged, it cannot be immediately confirmed from the external appearance, and therefore, it is only noticed after removing the packing sheet at the construction site. In particular, in the case of the above-mentioned shipping service, there is a problem that the number of times of replacement of the housing units is large, and the rate of occurrence of breakage of the units at the time of transshipment tends to increase. If damage is found at the construction site in this way, special repair materials that cannot be procured at the construction site may be required, in which case the repair material will be delivered from the housing unit production factory to the construction site . Therefore, when the construction site is remote from the production factory, the delivery to the construction site requires considerable labor, time, and the like, which impairs the work efficiency.
Moreover, if the housing unit is found for the first time upon arrival at the building site in the case of the damage, the arrangement of the repair material is delayed by that much, and the repair work and the juxtaposition of the housing unit until the arrival of the repair material. In other words, the lamination work cannot be performed.

[0004] As a method of improving these conventional disadvantages, there is a method described in Japanese Patent Application Laid-Open No. 8-324672. In this method, the ceiling part and the left and right side parts of the housing unit are covered with heat-shrinkable films, respectively, and then, at the vicinity of the shoulder corner of the housing unit, the overlapping portion of the ceiling film and the side film is pressed with a roll or the like. The housing unit is heat-sealed by using it, and the overlapping portion between the side portions is heat-sealed by a pressing roll or the like, and then hot air is applied to the left and right side portions to thermally shrink the housing unit. . And, on the production line of the housing unit, various packaging processing equipment such as the film unwinding and covering device, the heat sealing and sealing device, the film cutting device and the film heat shrinking device are arranged, and the packing operation is performed by a series of housing units They are completed within the production process.

According to this method, although problems such as collection management of the packing sheet are reduced, there are many problems in terms of waterproofness, workability of packing, and equipment. That is, a housing unit is typically 2.5 m high, 2 m wide and 5 long.
In order to wind an individual film on each side of such a large unit, not only a large apparatus but also a large number of hands are required. Means of heating the overlapped portion of the film between the surfaces in the coated state and fusing with a press roll becomes insufficient due to unevenness or the like caused by a member such as a metal member attached to the unit surface. Sometimes. Furthermore, housing units of various sizes, large and small, are used depending on the layout. Therefore, in order to uniformly and uniformly pack these units on a production line for each unit through the above-described process, there is a problem that control and management of the apparatus is complicated and equipment cost is increased.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables a housing unit to be easily packaged and to be reliably protected from rain and dust. It is an object of the present invention to provide a packing method and a packing structure for a housing unit that can be efficiently packed without requiring a package.

[0007]

SUMMARY OF THE INVENTION There are four inventions proposed here, three inventions relating to a housing unit packing method and one invention relating to a housing unit packing structure.

That is, in the first invention, a transparent or translucent heat-shrinkable sheet is preliminarily polymerized to form a rectangular packing sheet having one side opened and the other side closed, and this packing sheet is opened at the bottom. The present invention relates to a method of packing a housing unit, wherein the housing unit is covered with the bag as a bag, and then the packing sheet is shrunk by heating.

[0009] The second invention is to form a transparent or translucent heat-shrinkable sheet in advance by folding it in two, and welding both sides connected to the folded side to form a package sheet with one side opened. The present invention relates to a method of packing a housing unit, wherein the housing unit is covered with the housing unit as a bag having a lower opening, and then the packing sheet is heated and shrunk.

According to a third aspect of the present invention, a transparent or translucent heat-shrinkable sheet is preliminarily polymerized to form a rectangular packing sheet having an opening on one side and a closing on the other side, and covers the housing unit. A housing characterized by gripping and lifting a portion of the packing sheet corresponding to the upper corner portion of the housing unit to form a bag with an opening at the bottom, covering the housing unit, and then heating and shrinking the packing sheet. Pertains to unit packing method.

[0011] Further, a fourth invention provides a packaging sheet formed by folding a transparent or translucent heat-shrinkable sheet by folding it in two and welding both sides connected to the folded side to open the lower side. To cover the housing unit,
The present invention relates to a housing unit packing structure in which a packing sheet is heat shrunk and packed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of the heat-shrinkable sheet used in the present invention, FIG. 2 is a perspective view showing a packing sheet formed from the heat-shrinkable sheet of FIG. 1, and FIG. 3 is a second embodiment of the heat-shrinkable sheet. FIG. 4 is a perspective view showing a state where the packing sheet of FIG. 2 is put on a housing unit, and FIG.
3 is a perspective view showing a state in which the packing sheet of FIG. 3 is put on the housing unit, and FIG. 6 is a perspective view for explaining an embodiment of a method of putting the packing sheet on the housing unit.

FIG. 1 shows an example of a heat-shrinkable sheet used in the packing method of the present invention. This heat-shrinkable sheet 10A
Is formed of a known heat-shrinkable synthetic resin sheet, and has a strength and thickness that are not easily broken by projections, friction, or the like when placed on the housing unit. In this example, a polyethylene sheet having a thickness of 0.15 mm was used. It is important that the heat-shrinkable sheet 10A is transparent or translucent. As a result, the inside state can be checked without removing or rolling up the packing sheet covering the housing unit, handling the load carefully and easily finding even if the housing unit is damaged or defective. can do. In this example, as the heat-shrinkable sheets 10A, two heat-shrinkable sheets 10 formed in a rectangular shape having an appropriate size according to the size and shape of the house unit to be packed.
A and 10A are used. The two heat-shrinkable sheets 1
0A and 10A are superimposed in advance and, as shown in FIG. 2, the three sides 11, 11, 12, 12, 13, and
13 are welded to each other to form a packing sheet 10 having an opening 15 between the remaining sides 14 and 14. It should be noted that no special means is required for the method of welding the heat-shrinkable sheet 10A, and an appropriate method can be selected as long as the edge can be welded, for example, by sequentially heating and welding with a burner.

The packaging sheet 10 thus formed
Is preferably manufactured and stored separately from the housing unit. In addition, since the packing sheet 10 is flexible, it can be folded and rolled to have an appropriate size and stored compactly. Then, when packing the housing unit, the packing sheet 10 is formed into a bag shape by widening the opening 15 between the unwelded sides 14, 14, and as shown in FIG. To cover the housing unit U. After that, the packing sheet 10
After folding the both end portions 16 and 16 into a triangular shape and bending them downward appropriately and fixing them with tape or the like as necessary, the surface of the packing sheet 10 is heated by an appropriate method. Further, the edge portion of the opening 15 may be temporarily fixed to the housing unit U with a tape or the like before heating. Since the packing sheet 10 is made of the heat-shrinkable sheet 10A, the packing sheet 10 is heat-shrinked and adhered along the surface shape of the house unit U, which is an object to be packed, and packing is reliably performed. The method of heating the packing sheet 10 is not particularly limited, and an infrared light bulb, a hot air blower, and other devices and devices are appropriately selected or used in combination.

FIG. 3 shows a second embodiment of the packing sheet. In the present embodiment, one rectangular heat-shrinkable sheet 20A formed in an appropriate size is connected to its long sides 21 and 2.
The sheet is folded in two at the intermediate position of No. 2 and the overlapping sides 21A and 22A connected to the folded piece 26 are welded to form the packing sheet 20. An opening 25 is formed between the short sides 23 and 24 that are not welded.
The packing sheet 20 is formed into a bag shape by opening the opening 25 portion, and is put on the housing unit U as shown in FIG. Thereafter, the packing sheet 20 is shrunk by heating so as to adhere to the housing unit, and the housing unit is packed.
In this example, since the packing sheet 20 can be formed from one heat-shrinkable sheet 20A, compared with the previous embodiment shown in FIG. However, an extremely reliable packing sheet can be obtained easily and quickly.

According to the packing method and packing structure of the present invention, before packing, the packing sheet can be appropriately folded, rolled, or stacked, and can be stored and transported in a compact state. It is valid. Also, at the time of packing, since the packing sheet is spread over the housing unit by spreading it in a bag shape and heat shrinking, compared with the conventional method of directly winding the heat shrinkable sheet around the housing unit and heat welding the polymerized portion, There is an advantage that work can be performed very efficiently without being affected by the size and uneven shape of the housing unit and with a small number of welded portions. Furthermore, the work can be sufficiently performed with a small welding machine, and furthermore, since the welding can be performed in a flat state, there is no occurrence of poor welding or unwelded portion, and the house unit to be packed can be reliably protected. In addition, since the packing sheet is made of transparent or translucent, it is possible to always easily check the state of the housing unit being transported in the packed state, and it is possible to efficiently make arrangements in case of damage.

By the way, when the bag-shaped packing sheet is put on the housing unit, a small amount of manpower is required to greatly widen the opening. In the third invention, such a problem is solved and the packing sheet is removed. The housing unit can be efficiently and reliably covered with a small number of hands. FIG. 6 shows one embodiment. In this example, the packing sheet 20 shown in FIG. 3 was used.

As shown in the figure, the packing sheet 20 is folded and wound next to the packing position of the housing unit U when the packing sheet 20 is put on the housing unit U.
0, the corners U1, U2. Grasp the outside slightly from the portion corresponding to U3, U4 and lift it upward. Thereby, the opening 25 of the packing sheet 20 opens downward. Thereafter, the housing unit U is moved directly above the conveyed housing unit U and lowered, and the upper packing sheet 20 is put on the housing unit U.

In this example, when the packing sheet 20 is lifted upward and put on the housing unit U, the lifting member 3
0 is used. The lifting member 30 is provided with a large number of gripping members 32 at required positions of the frame member 31 and is provided on the conveyor 35 almost right above the packing position of the housing unit U. The position of the housing unit U can be changed back and forth, right and left, and up and down by a suitable driving device (not shown). Frame material 3
1 is formed in a rectangular shape larger than the size of the upper surface of the housing unit U, and the holding member 32 is attached to a required position on the lower surface side. In the present example, the gripping members 32 are also provided at a substantially middle portion of the long side of the frame member 31, and there are six in total. As the gripping member 32, for example, a clip that can freely grip the packing sheet 20 is used. Further, this gripping member 32
Are attached to the frame material 31 in a state of being hung on the string 33, so that the housing unit U to be packed can cope with a difference in size or shape of the upper surface.

The hoisting member 30 is lowered when the housing unit U moving on the conveyor 35 is transported to the packing position, and lowers the holding packing sheet 20 to the housing unit U.
From above. Then, the packing sheet 20 is removed from the holding member 32.

A heating device 36 is provided in front of the lifting member 30 (in the traveling direction of the conveyor 35). The heating device 36 is formed in a gate shape through which the conveyor 35 can pass, and a number of infrared light bulbs 37 are provided inside the heating device 36. The heating device 36 is activated when the housing unit U covered with the packing sheet 20 is conveyed to the vicinity of the heating device 36 by the conveyor 35, and is cut off when the housing unit U passes therethrough. When passing through the inside 36, the packing sheet 10 covering the housing unit U is heated and thermally contracted.

[0022]

As described above, according to the housing unit packing method and packing structure of the present invention, a packing sheet formed by pre-polymerizing a heat-shrinkable sheet and welding it into a bag is attached to the housing unit. Since the housing unit is covered and contracted by heating, the housing unit can be easily and reliably packed. Also, the manufacturing of the packing sheet is simply performed by welding the necessary outer peripheral portion of the polymerized heat-shrinkable sheet outside the production line of the housing unit in advance into a bag shape, so that the welding operation is easy and the welding is insufficient. The occurrence of unusual portions and unwelded portions is extremely reduced, and the waterproofness of the packing sheet is enhanced. Further, the welding operation can be performed easily and reliably even with a small welding machine, and the workability is excellent and mass production is possible. Further, since the obtained packing sheet is thin and flexible, it can be compacted by being folded or wound, and is easy to store and effective in space. In addition, it can be easily expanded at the time of use, and there is no problem in workability. Furthermore, even a large packing sheet can be easily opened in a bag shape and covered on the housing unit by turning the opening downward, grasping and lifting the part of the packing sheet corresponding to the corner on the upper surface of the housing unit. Therefore, it is possible to work with a small number of hands. In addition, the use of a transparent or translucent heat-shrinkable sheet makes it easy and quick to check the items to be packed. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a packing sheet used in the present invention.

FIG. 2 is a perspective view showing a packing sheet formed from the heat-shrinkable sheet of FIG.

FIG. 3 is a perspective view showing a second embodiment of the heat-shrinkable sheet.

FIG. 4 is a perspective view showing a state where the packing sheet of FIG. 2 is put on a housing unit.

FIG. 5 is a perspective view showing a state where the packing sheet of FIG. 3 is put on a housing unit.

FIG. 6 is a perspective view illustrating an embodiment of a method of placing a packing sheet on a housing unit.

[Description of Signs] 10, 20 Packing sheet 10A, 20A Heat-shrinkable sheet 11, 12, 13, 21A, 22A Overlapping edge (welding edge) 15, 25 Opening 30 Lifting member 32 Holding member U Housing unit

Claims (4)

[Claims] 1. A transparent or translucent heat-shrinkable sheet is preliminarily polymerized to form a rectangular packing sheet having one side open and the other side closed, and this packing sheet is formed into a bag-like shape with an opening at the bottom to form a housing unit. A method for packing a housing unit, comprising covering and then shrinking the packing sheet by heating. 2. A transparent or translucent heat-shrinkable sheet is preliminarily folded and polymerized in two, and both sides connected to the folded side are welded to form a package sheet having one side opened. A method for packing a housing unit, comprising covering the housing unit in a bag shape and then heating and shrinking the packing sheet. 3. A transparent or translucent heat-shrinkable sheet is preliminarily polymerized to form a rectangular packing sheet having an opening on one side and a closing on the other side. A method of packing a housing unit, comprising: gripping and lifting a portion of a packing sheet corresponding to a part to form a bag having an open bottom, covering the housing unit, and then heating and shrinking the packing sheet. 4. A transparent or translucent heat-shrinkable sheet is polymerized by folding in two, and both sides connected to the fold side are welded to open a lower side to form a packing sheet. A housing unit packing structure, wherein the housing unit is covered and packed by heat shrinking the packing sheet.