Transport method of building unit in rainy weather

Abstract

To make it possible to transport a building unit without getting it wet in rainy weather, without using a waterproof sheet specially designed for rainy weather.SOLUTION: In a transport method of a building unit 3 in rainy weather, a polyfilm cover 11 for packaging is put on the building unit 3 from above. Then, a polyfilm cover 11 is pressed down by a pressing member 10. The building unit 3 is transported in rainy weather while being covered with the polyfilm cover 11. The pressing member 10 may be a net-like pressing cover 33. The polyfilm cover 11 is thick enough to have wind resistance strength, and the pressing member 10 may be a cargo tightening belt 37.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for transporting building units in rainy weather. [Background technology]

[0002] Some buildings, such as houses, are composed of unit buildings. Unit buildings are buildings that can be constructed in a short period of time by transporting rectangular parallelepiped building units manufactured in advance in a factory to a construction site, where they are assembled and installed (see, for example, Patent Document 1).

[0003] In such modular buildings, it is necessary to waterproof the interior of the building units to prevent rainwater from entering them, from the time the building units are shipped from the factory and transported to the construction site, to the time the modular buildings are installed at the construction site and the exterior of the building is completed.

[0004] For this reason, in Patent Document 1, for example, when it rains, the building unit is shipped with a rainproof sheet of a size and shape sufficient to cover the entire top and side surfaces of the building unit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 5-17003 Summary of the Invention [Problem to be solved by the invention]

[0006] In the above patent document, when it rains, the building unit is covered with a rainproof sheet that is large and shaped to cover the entire top and sides of the building unit before being transported, but the waterproof sheet used is a rain cover that is specially made for rainy weather. Therefore, the production of the rainproof sheet is costly. In addition, the rainproof sheet is thick enough that it takes time and effort to attach and detach it from the building unit, making it difficult to handle.

[0007] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0008] In response to the above problems, the present invention provides: The building unit is covered with a polythene film cover for packaging. The polyfilm cover is pressed down by a pressing member, The method for transporting a building unit in rainy weather is characterized in that the building unit is transported in rainy weather while the building unit is kept covered with the polyfilm cover. Effect of the Invention

[0009] With the above-mentioned configuration, the present invention makes it possible to transport the building unit in rainy weather without using a waterproof sheet specially designed for rainy weather, and without getting the building unit wet. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is an overall perspective view of the method for transporting a building unit in rainy weather according to the first embodiment. [Diagram 2] FIG. 11 is an overall perspective view of a method for transporting a building unit in rainy weather according to a second embodiment. [Diagram 3] FIG. 11 is an overall perspective view of a method for transporting a building unit in rainy weather according to a third embodiment. [Figure 4]FIG. 1A is a perspective view showing the state in which the first building unit has been installed on the foundation, and FIG. 1B is a perspective view showing the state in which the polyfilm cover of the building unit first installed on the foundation has been flipped up. [Diagram 5] This is an oblique view showing the state in which a long waterproofing material is attached to the lower part of the building unit that was initially installed on the foundation. [Figure 6] FIG. 13 is a perspective view showing the state in which adjacent building units are stopped in mid-air during installation on the foundation. [Figure 7] FIG. 13 is a perspective view showing the polyfilm covers of adjacent building units being flipped up. [Figure 8] 1 is a perspective view showing the state in which a long waterproofing material is attached to the upper part of an adjacent building unit. FIG. [Figure 9] FIG. 13 is a perspective view showing adjacent building units installed on a foundation. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] This embodiment will be described in detail with reference to FIGS. EXAMPLES

[0012] <Configuration> This embodiment has the following configuration:

[0013] A building 1 (see Figs. 4 to 9) such as a house is composed of unit buildings. The unit building is a building 1 that can be constructed in a short period of time by transporting roughly rectangular parallelepiped building units 3 manufactured in advance in a factory 2 to a construction site 4 (Fig. 4) and assembling and installing them at the construction site 4. The building unit 3 has a strong unit frame with a box rigid frame structure inside as a skeleton part, in which the upper ends of four columns 3a are connected in a rectangular shape by four ceiling beams 3b, and the lower ends of the four columns 3a are connected in a rectangular shape by four floor beams 3c.

[0014] In such a modular building, waterproofing is performed to prevent rainwater from entering the interior of the building unit 3 from the time the building unit 3 shipped from the factory 2 is transported to the construction site 4 until the building unit 3 is installed at the construction site 4 and the exterior shape of the building 1 is completed.

[0015] Once manufactured in the factory 2, the building units 3 are temporarily transported to a waiting area 6 (Fig. 2) where they are temporarily stored, and on the day of construction they are transported from the waiting area 6 to the construction site 4. The building units 3 transported to the construction site 4 are installed on foundations 7 (Fig. 4) that have been prepared in advance on the grounds of the construction site 4.

[0016] The construction site 4 is a place where the building 1 is constructed, and is located away from the factory 2 and the waiting area 6. The waiting area 6 is set at a position between the factory 2 and the construction site 4 and close to the construction site 4. The transportation of the building unit 3 from the factory 2 to the waiting area 6 does not necessarily take place in rainy weather. At least, the transportation of the building unit 3 from the waiting area 6 to the construction site 4 takes place in rainy weather.

[0017] In contrast to the above, this embodiment may have the following configuration.

[0018] (1) The method for transporting the building unit 3 in rainy weather is as shown in Example 1 of FIG. A poly film cover 11 for packaging is placed over the building unit 3, By pressing the polyfilm cover 11 with the pressing member 10, The building unit 3 is transported in rainy weather while being covered with the polyfilm cover 11.

[0019] Here, the building unit 3 has a top surface 13 and a bottom surface 12 that are substantially rectangular in plan view, and four substantially rectangular side surfaces 14 that are provided between the top surface 13 and the bottom surface 12 so as to surround the periphery of the top surface 13 and the bottom surface 12. The top surface 13 and the bottom surface 12 of the building unit 3 are made non-waterproof. The side surface 14 of the building unit 3 that faces the outdoors is made waterproof by having an exterior wall 15 attached to it. In addition, the side surface 14 of the building unit 3 that faces the indoors is made non-waterproof by having an opening (indoor opening surface 16) or the like. Therefore, at least the top surface 13 and the side surface 14 that faces the indoors (indoor opening surface 16) need to be waterproofed (temporarily rainproofed) in case of rain.

[0020] The polyfilm cover 11 is a cover film made of transparent or translucent polyfilm that is used for packaging (or product packaging) and is placed over the building unit 3, and has a three-dimensional shape roughly similar to the rectangular parallelepiped shape of the building unit 3.

[0021] The polyfilm cover 11 has a size and shape (almost a rectangular parallelepiped) that can cover the entire exterior shape of the building unit 3. The polyfilm cover 11 integrally has a top surface portion 17 that covers the top of the top surface 13 of the building unit 3, and four side surface portions 18 that cover the outsides of the four side surfaces 14, and has an opening at the bottom surface. The polyfilm cover 11 is placed on the building unit 3 from above through the opening at the bottom surface portion. When the polyfilm cover 11 is placed on the building unit 3, the top surface portion 17 covers the top surface 13 of the building unit 3, the side surface portions 18 cover the side surfaces 14 of the building unit 3, and the lower parts of the side surface portions 18 almost reach the bottom surface 12 of the building unit 3.

[0022] The holding member 10 is a member that holds down the polyfilm cover 11 placed on the building unit 3 to prevent it from scattering during transportation. The holding member 10 is a separate member from the polyfilm cover 11. Any member may be used as the holding member 10 as long as it can hold down the polyfilm cover 11, but for example, the following may be used.

[0023] In this embodiment, a poly film cover 11 is directly placed on the building unit 3 when it is shipped from the factory 2. A ceiling bulkhead material 41 is placed on the poly film cover 11, and a ceiling cover 42 and a unit cover 43 are placed on top of that in that order. The holding down member 10 is at least one of the ceiling bulkhead material 41, the ceiling cover 42, and the unit cover 43.

[0024] Here, the ceiling bulkhead 41 is an existing removable auxiliary member that is placed on the upper surface 13 of the building unit 3 to make the upper surface 13 of the building unit 3 flat and to reinforce the upper surface 13 so that workers can stand on it. The ceiling bulkhead 41 is basically placed directly on the upper surface 13 of the building unit 3. However, in this embodiment, the order is changed so that the ceiling bulkhead 41 is placed on top of the polyfilm cover 11. This allows the ceiling bulkhead 41 to hold down the upper surface portion 17 from above, and also makes it possible to remove (the ceiling bulkhead 41) from the upper surface 13 of the building unit 3 without removing the polyfilm cover 11.

[0025] The ceiling cover 42 is an existing removable cover member for protecting the top surface 13 and the upper parts of the side surfaces 14 of the building unit 3 during storage and transportation. The ceiling cover 42 is placed over the top surface 13 of the building unit 3 at least at the time of shipment from the factory 2. By placing the ceiling cover 42 on the polyfilm cover 11, it becomes possible to hold down at least the top surface portion 17 with a surface and to restrain the upper parts of the side surfaces 18.

[0026] The unit cover 43 is an existing removable cover member for protecting the entire building unit 3 during storage and transportation. The unit cover 43 has a three-dimensional shape similar to that of the approximately rectangular parallelepiped building unit 3. The unit cover 43 is placed over the building unit 3 so as to cover the entire building unit 3, at least at the time of shipment from the factory 2. By placing the unit cover 43 on the polyfilm cover 11, it becomes possible to press down the top surface portion 17 and the side surface portion 18 at once.

[0027] In the rainy weather transportation method of this embodiment, as described above, the building unit 3 is transported from the factory 2 to the waiting area 6 with the polyfilm cover 11, the ceiling bulkhead 41, the ceiling cover 42, and the unit cover 43 placed on top in that order. Then, from the waiting area 6 to the construction site 4, the building unit 3 is transported by truck in the above-mentioned state.

[0028] At the construction site 4, the unit cover 43, ceiling cover 42, and ceiling bulkhead 41 are removed in that order from the building unit 3 on the truck. The polyfilm cover 11 is left on the building unit 3. The building unit 3 covered with the polyfilm cover 11 is hoisted from the truck by a crane via a hoisting wire 46 (FIG. 6) and installed on the foundation 7 or the like.

[0029] (2) In the above, in the rainy weather transportation method of the building unit 3, as shown in Example 2 of FIG. 2, The pressing member 10 may be a net-like pressing cover 33.

[0030] Here, the net-like pressing cover 33 is a cover (net cover) formed of a net that is placed on the building unit 3 from above the polyfilm cover 11. The net-like pressing cover 33 may have any shape as long as it can press the polyfilm cover 11, but it is preferable that it has a three-dimensional shape substantially similar to the building unit 3, which is substantially rectangular.

[0031] The net-like presser cover 33 in this embodiment has a size and shape (approximately rectangular parallelepiped) that can cover the entire outer shape of the building unit 3 together with the polyfilm cover 11.

[0032] The net-like pressing cover 33 has a top surface portion 33a that covers the top of the upper surface portion 17 of the polyfilm cover 11 placed on the building unit 3, and four peripheral surface portions 33b that cover the outside of the four side surface portions 18, and has an opening at the bottom surface. The net-like pressing cover 33 is placed on the building unit 3 together with the polyfilm cover 11 from above through the opening at the bottom surface portion. When the net-like pressing cover 33 is placed on the polyfilm cover 11, the top surface portion 33a presses down the entire surface of the upper surface portion 17 of the polyfilm cover 11. In addition, the peripheral surface portion 33b of the net-like pressing cover 33 covers the entire surface of the side surface portions 18 of the polyfilm cover 11, and the lower portion of the peripheral surface portion 33b almost reaches the bottom surface 12 of the building unit 3.

[0033] The net-like presser cover 33 is preferably made of resin so as not to absorb rainwater and become heavy. The net-like presser cover 33 has a mesh size and strength that can effectively hold down the polyfilm cover 11 during transportation.

[0034] The net-like hold-down cover 33 may have fasteners such as hooks or magnets so that it can be fixed to the bottom of the building unit 3 or the bed of a truck with the fasteners. The net-like hold-down cover 33 is removed from the building unit 3 on the truck before the building unit 3 is lifted from the truck by a crane at the construction site 4. At this time, the polyfilm cover 11 is left covering the building unit 3.

[0035] In this case, the building unit 3 is transported from the factory 2 to the waiting area 6 in a normal shipping packing form, in which the ceiling bulkhead 41, the polyfilm cover 11, the ceiling cover 42, and the unit cover 43 are placed in that order. The normal shipping packing form differs from that shown in FIG. 1 in that the ceiling bulkhead 41 is placed under the polyfilm cover 11.

[0036] Then, in the waiting area 6, all of these are temporarily removed from the building unit 3, and then the polyfilm cover 11 and the net-like press cover 33 are put back on the building unit 3. From the waiting area 6 to the construction site 4, the building unit 3 is transported by truck with only the polyfilm cover 11 and the net-like press cover 33 still on.

[0037] It is preferable that the lower edge of the polyfilm cover 11 is fixed to the floor beams 3 c constituting the bottom surface 12 of the building unit 3 with adhesive tape 36 .

[0038] At the construction site 4, the net-like retaining cover 33 is removed from the building unit 3 on the truck, and the polyfilm cover 11 is left covering the building unit 3. The building unit 3 covered with the polyfilm cover 11 is lifted from the truck by a crane and installed on the foundation 7 or the like.

[0039] (3) In the above, in the rainy weather transportation method of the building unit 3, as shown in Example 3 of FIG. 3, The polyfilm cover 11 is thick enough to withstand wind. The holding down member 10 may be a load-tightening belt 37.

[0040] Here, the wind resistance is the strength that can withstand the influence of wind that the polyfilm cover 11 receives during transportation of the building unit 3. By having the wind resistance, the polyfilm cover 11 is prevented from being torn during transportation.

[0041] The thickness is the thickness dimension of the polyfilm cover 11. The polyfilm cover 11 is a cover made of a polyfilm having a thickness of less than 0.1 mm.

[0042] Here, the poly film is a thin resin material similar to that generally used for product packaging films. The poly film used for the poly film cover 11 is intended primarily for packaging purposes, and is not particularly designed for waterproofing in rainy weather (temporary rainproofing). However, since the poly film cover 11 is made of poly film, it is waterproof. And since the poly film cover 11 is extremely thin, less than 0.1 mm thick, it remains lightweight even when used in large quantities. Therefore, the poly film cover 11 formed for product packaging is used for the building unit 3 instead of a waterproof sheet (rain cover) specifically for rainy weather.

[0043] The poly film cover 11 is, for example, a poly film having a thickness of about 0.011 mm to 0.09 mm. The poly film cover 11 may be relatively thin within the above range, that is, 0.03 mm to 0.06 mm, for example, 0.02 mm. The poly film cover 11 may be relatively thick within the above range, that is, 0.06 mm to 0.09 mm, for example, 0.08 mm.

[0044] For the transportation of the building unit 3, a polyfilm cover 11 of thin type a (e.g., 0.02 mm thick) is usually used. In the first embodiment of FIG. 1 and the second embodiment of FIG. 2, a polyfilm cover 11 of thin type a is used. In order to provide sufficient wind resistance, it is preferable to use a polyfilm cover 11 of thick type b (e.g., 0.08 mm thick) of the above. In the third embodiment, the building unit 3 uses a polyfilm cover 11 of thick type b for transportation. In the first embodiment of FIG. 1 and the second embodiment of FIG. 2, a polyfilm cover 11 of thick type b may also be used.

[0045] In contrast, a waterproof sheet (rain cover) for rainy weather only (not shown) serving as a comparative example is formed of a material similar to that of a construction work sheet used as a protective sheet or material cover at a construction site, for example. Such construction work sheets are made of a material similar to that of a multipurpose sheet called a blue sheet for general use, and are similar or thicker. A waterproof sheet for rainy weather only is often formed to a thickness similar to that of a work sheet. Therefore, a waterproof sheet (rain cover) for rainy weather only is very thick, for example, having a thickness of 0.1 mm or more and a few millimeters or less. A waterproof sheet (rain cover) for rainy weather only is not a member for product packaging, and is therefore used by layering it on a polyfilm cover 11 for product packaging.

[0046] Comparing the two, a rain cover for use only in rainy weather is generally made of a thin and durable material, but is considerably thicker than the poly film cover 11, and the larger it is, the more difficult it is to handle. On the other hand, the poly film cover 11 is incomparably thinner, so even if it is made larger, it is not as difficult to handle as a rain cover for use only in rainy weather. In other words, a poly film cover 11 of the size and shape to be placed over a building unit 3 is much easier to handle than a rain cover for use only in rainy weather of the same size and shape, and can be an effective waterproofing member. Therefore, the poly film cover 11 for product packaging is a member that is completely different from a rain cover for use only in rainy weather.

[0047] The securing belt 37 is a fastening belt for tying down the cargo loaded on the bed of the truck and fixing it to the bed, and is called, for example, a lashing belt. The main part of the lashing belt is made of a flexible belt body made of chemical fiber, and has terminal fittings such as hooks on both ends.

[0048] The lashing belt may be provided with a length-adjusting reel at the middle of the belt body. The reel may have, for example, a reel shaft having a ratchet gear, an operating lever having a locking pawl that locks with the ratchet gear, and a release lever that releases the locking state of the locking pawl with respect to the ratchet gear.

[0049] The retracting fitting is designed so that the locking claw is not locked to the ratchet gear in the direction in which the belt body is wound around the retracting shaft, but is locked in the rewinding direction (or is prevented from rewinding). The retracting fitting can be used to tighten the belt body around the retracting shaft using the operating lever, thereby tightening the belt body and securing the cargo (securing the cargo). The retracting fitting can be used to release the locking claw from the ratchet gear using the release lever, thereby loosening the belt body. This allows the lashing belt to be used as a cargo securing belt 37.

[0050] From the factory 2 to the waiting area 6, the building unit 3 is transported in a normal shipping form, with the ceiling bulkhead 41, the thin a polythene film cover 11, the ceiling cover 42, and the unit cover 43, in that order. Then, in the waiting area 6, after all of these are removed, the building unit 3 is covered with the thick b polythene film cover 11, and further tied with the fastening belt 37 from above the thick b polythene film cover 11.

[0051] It is preferable that the lower edge of the thick b polyfilm cover 11 is fixed to the floor beams 3 c constituting the bottom surface 12 of the building unit 3 with adhesive tape 36 .

[0052] The securing belts 37 are stretched across the polyfilm cover 11 in both the short side direction X and the long side direction Y of the building unit 3. In this embodiment, two securing belts 37 are stretched across each of the short side direction X and the long side direction Y to hold the polyfilm cover 11 down with lines.

[0053] From the waiting area 6 to the construction site 4, the building unit 3 is transported by truck covered with a thick polythene film cover 11 and secured with a securing belt 37.

[0054] If it is decided to use the securing belt 37 for the holding member 10, the building unit 3 may be covered with a thick b polythene film cover 11 at the time of shipment from the factory 2. The thick b polythene film cover 11 may be used as it is in the waiting area 6.

[0055] At the construction site 4, the securing belts 37 are removed from the thick b polythene film cover 11 that was placed on the building unit 3 on the truck. The polythene film cover 11 is then left covering the building unit 3. The building unit 3 covered with the thick b polythene film cover 11 is lifted from the truck by a crane and installed on the foundation 7 or the like.

[0056] The securing belt 37 may be placed directly on the thick polyfilm cover 11 as shown in FIG. 3, but it may also be placed on the net-like pressure cover 33 of the second embodiment shown in FIG.

[0057] <Function> The function of this embodiment is as follows.

[0058] A building unit 3 is manufactured in a factory 2 and transported from the factory 2 to a construction site 4. On the way, the building unit 3 may be temporarily put on hold in a waiting area 6. It does not matter whether it is raining when the building unit 3 is transported from the factory 2 to the waiting area 6, but at least it is raining when the building unit 3 is transported from the waiting area 6 to the construction site 4.

[0059] The building unit 3 is usually packed for shipping at the factory 2 with, from the top, a ceiling bulkhead 41, a thin poly film cover 11 for product packaging, a ceiling cover 42, and a unit cover 43 covered thereon.

[0060] In rainy weather, the building units 3 need to be waterproofed so that they do not get wet during transportation. In this case, the transportation requiring waterproofing is mainly the transportation from the waiting area 6 to the construction site 4, as described above.

[0061] Therefore, in this embodiment, the building unit 3 is covered with a polyfilm cover 11 for product packaging and held down by a holding member 10, so that the building unit 3 is transported in rainy weather while being kept covered with the polyfilm cover 11. The polyfilm cover 11 also waterproofs the building unit 3.

[0062] In this case, as in the first embodiment, the holding down member 10 may be at least one of the ceiling bulkhead material 41, the ceiling cover 42, and the unit cover 43. In this case, in the factory 2, the polyfilm cover 11 is placed directly on top of the building unit 3, and the ceiling bulkhead material 41 is placed on top of the polyfilm cover 11. The ceiling cover 42 and the unit cover 43 are placed on top of the ceiling bulkhead material 41. In this state, the building unit 3 is transported from the factory 2 to the waiting area 6, and is transported in this state from the waiting area 6 to the construction site 4. Since the building unit 3 can be transported in the same state from the factory 2 to the construction site 4, it does not require much effort.

[0063] As in Example 1, the ceiling bulkhead 41 is placed on top of the polyfilm cover 11 in a shipping form suitable for rainy weather, for example, when it is predicted in advance that it will rain on the day of transportation from the waiting area 6 to the construction site 4 on the day of shipment from the factory 2.

[0064] Also, as in the second embodiment, the pressing member 10 may be a net-like pressing cover 33. In this case, the building unit 3 is transported to the waiting area 6 in the factory 2 in the normal shipping form, and after the building unit 3 is completely removed in the waiting area 6, the building unit 3 is covered with the polyfilm cover 11 and the net-like pressing cover 33. The building unit 3 is then transported in this state from the waiting area 6 to the construction site 4. The net-like pressing cover 33 in this embodiment covers the building unit 3 and the polyfilm cover 11 in such a way that it completely wraps around them, thereby preventing the load from falling, and therefore the building unit 3 can be transported in this state not only in rainy weather but also under normal circumstances.

[0065] Alternatively, as in the third embodiment, the polyfilm cover 11 may be thick enough to resist wind, and the pressing member 10 may be a tie-down belt 37. In this case, the building unit 3 is transported to the waiting area 6 in the factory 2 in a normal shipping form, and once all the components are removed from the waiting area 6, the building unit 3 is covered with a polyfilm cover 11 of thickness b, and further tied with a tie-down belt 37 from above the polyfilm cover 11 of thickness b. The building unit 3 is then transported from the waiting area 6 to the construction site 4 in this state.

[0066] In the second and third embodiments, the shipping packaging is changed to a polyfilm cover 11 with a net-like presser cover 33 or a load-tightening belt 37 attached at the waiting area 6. This is done, for example, when it is predicted that the day of transportation from the waiting area 6 to the construction site 4 will be rainy while the goods are waiting at the waiting area 6.

[0067] This allows all shipments from the factory 2 to be the same, and eliminates the need to predict the weather on the day of transportation to the construction site 4 and change the response when shipped from the factory 2. Also, by changing the state to rainy weather in the waiting area 6, it is possible to more accurately predict and respond to the weather on the day of transportation to the construction site 4. In particular, the third embodiment is suitable for cases where rain accompanied by strong winds is predicted.

[0068] The building unit 3 is transported to the construction site 4 using this rainy weather transportation method so as not to get wet in the rain, and by removing the holding member 10 at the construction site 4, the building unit 3 is left covered only with the polyfilm cover 11.

[0069] In Example 1, the unit cover 43, ceiling cover 42, and ceiling bulkhead 41 are removed. The removed unit cover 43, etc. may be folded at the construction site 4 if there is sufficient space, or may be carried to the waiting area 6 and folded at the waiting area 6 if there is not sufficient space. In Examples 2 and 3, the net-like presser cover 33 or the securing belts 37 are removed. The removed net-like presser cover 33 or the securing belts 37 do not require much space, so they can be folded quickly at the construction site 4. In Examples 2 and 3, there is little to remove, so the removal and folding work at the site can be minimized.

[0070] Furthermore, the transported building units 3 must be installed at the construction site 4 without getting wet.

[0071] Therefore, in the method for installing the building units 3 in rainy weather, first, as shown in FIG. 4(a), the first building unit 3 is installed on the foundation 7 at the construction site 4. Then, as shown in FIG. 4(b), the four side portions 18 of the polyfilm cover 11 that is placed over the building unit 3 installed on the foundation 7 are turned up and placed together on the top portion 17. It is preferable that the turned-up four side portions 18 are placed together along the periphery of the top portion 17. The work of putting the side portions 18 together is performed by a worker standing on the top surface 13 and the top portion 17. The worker should not stand on the turned-up side portions 18 to prevent slipping. The four corners of the top portion 17 of the polyfilm cover 11 are temporarily fixed to the building unit 3 with magnets or clips to prevent scattering.

[0072] Next, the building unit 3 with the film turned up provides watertightness around the opening on the indoor side. For example, as shown in FIG. 4(b), a first watertight material 51 extending in the vertical direction is attached to the left and right pillars 3a. The watertight material 51 may be, for example, a long material made of silicone foam. The watertight material 51 may be attached to the pillars 3a with, for example, double-sided adhesive tape.

[0073] 5, a second water stop material 52 extending horizontally is attached to the floor beams 3c of the building unit 3. The water stop material 52 may be, for example, a long material made of open-cell polyethylene foam. At this time, a long water stop material 52 made of open-cell polyethylene foam may also be attached to the ceiling beams 3b of the installed building unit 3 from the position of the upper surface 13 of the building unit 3. The long water stop material 52 may, for example, have an adhesive layer on its surface and be attached to the floor beams 3c and ceiling beams 3b with the adhesive layer.

[0074] The above-mentioned water-stopping materials 51, 52 are attached at least to the pillars 3a and floor beams 3c on the side where the adjacent building unit 3 is installed. In addition to the water-stopping materials 51, 52, water-absorbing materials may be appropriately installed around the openings on the indoor side of the building units 3, if necessary, so that the water-absorbing materials absorb rainwater.

[0075] Next, as shown in Figure 6, an adjacent building unit 3 is lowered next to the building unit 3 previously installed on the foundation 7. Along the way, the adjacent building unit 3 is stopped at a height required for the work and temporarily suspended in mid-air. At this time, the gap between the building unit 3 previously installed on the foundation 7 and the adjacent building unit 3 is kept below a specified value (e.g., 300 mm) so as not to become too large.

[0076] Next, as shown in Fig. 7, while the building units 3 are stopped and suspended in the air, the side portions 18 of the polyfilm covers 11 covering the adjacent building units 3 are turned up and placed together on the top portions 17. The work of turning up the side portions 18 of the polyfilm covers 11 is performed from both the position above the building units 3 previously installed on the foundation 7 and the position at the foundation 7.

[0077] At this time, if the long waterproof material 52 made of open-cell polyethylene foam was not attached to the ceiling beam 3b of the building unit 3 previously installed on the foundation 7 in Fig. 5, the following work is carried out instead. That is, as shown in Fig. 8, in the adjacent building unit 3, a long waterproof material 52 made of open-cell polyethylene foam is attached to the ceiling beam 3b of the opening facing the building unit 3 previously installed on the foundation 7 and facing the room side.

[0078] Next, as shown in Figure 9, adjacent building units 3 are lowered and installed on the foundation 7. Then, part of the turned-up side portion 18 of the polyfilm cover 11 is spread over the upper portion between the building units 3 and wrapped around the adjacent polyfilm cover 11 (wrap portion 21), waterproofing the space between the upper portions of the building units 3. The four corners of the top surface portion 17 of the polyfilm cover 11 of the adjacent building units 3 are temporarily fastened to the building unit 3 with magnets or clips to prevent it from scattering.

[0079] The above steps are repeated to install all of the building units 3 on the lower floor on the foundation 7. Then, once all of the building units 3 on the lower floor have been installed on the foundation 7, a waterproof tent is spread over all of the building units 3 on the lower floor to waterproof all of the building units 3 on the lower floor with the waterproof tent. The waterproof tent may be a foundation waterproof cover 47 that has been installed in advance on the foundation 7, or a dedicated waterproof tent may be used.

[0080] The foundation waterproof cover 47 is a waterproof sheet of a shape and size sufficient to cover the entire foundation 7, and is turned over in order to cover the building units 3 to be installed, thereby preventing rainwater from entering the foundation 7. Once all the building units 3 on the lower floor have been installed on the foundation 7, the foundation waterproof cover 47 is removed from the foundation 7, and can then be used as a waterproof tent.

[0081] Then, while still covered with the waterproof tent, the polyfilm cover 11 is entirely removed from the upper surface 13 of the building unit 3 of the lower floor, taking care not to get the building unit 3 wet. This completes the installation of the building unit 3 of the lower floor on the foundation 7. The polyfilm cover 11 is folded up on the spot and collected.

[0082] Thereafter, the installation work for the building units 3 on the upper floors is carried out in the same manner as above for the building units 3 on the lower floors. At this time, the waterproof tent is turned up in order to install the building units 3 on the upper floors. By carrying out this installation work for the building units 3 on the upper floors for the number of floors, the unit building is constructed without getting wet at all. This also means that the building units 3 can be transported and installed even in rainy weather.

[0083] <Effects> The effects of this embodiment are as follows.

[0084] (Effect 1) By covering the building unit 3 from above with a polyfilm cover 11 for packaging, almost the entire building unit 3 is wrapped in the polyfilm cover 11, preventing the building unit 3 from getting wet in rainy weather.

[0085] By pressing the polyfilm cover 11 with the pressing member 10, the state in which the polyfilm cover 11 is covered on the building unit 3 is maintained, so that in rainy weather the building unit 3 can be transported in a relatively simple package with only the polyfilm cover 11 covered. The pressing member 10 prevents the polyfilm cover 11 from scattering off the building unit 3 during transportation.

[0086] The polyfilm cover 11 can be the same product packaging that is used to cover the building unit 3 during normal shipping, so there is no cost involved. In addition, the polyfilm cover 11 is extremely thin, so attaching and detaching it from the building unit 3 does not require much effort or time. Furthermore, by using the polyfilm cover 11, it becomes possible to transport the building unit 3 without getting it wet in rainy weather, without using a special waterproof sheet for rainy weather. Since no special waterproof sheet for rainy weather is used, the effort and time required to use a special waterproof sheet for rainy weather is not required.

[0087] (Effect 2) By using the pressing member 10 as the net-like pressing cover 33, the net-like pressing cover 33 can evenly press down the entire polyfilm cover 11 to prevent the polyfilm cover 11 from scattering during transportation.

[0088] The net-like presser cover 33 is not bulky and has a reduced weight because of its net shape, so it is easy to handle and can be folded up without taking up space at the construction site 4.

[0089] (Effect 3) By making the polyfilm cover 11 thick enough to withstand wind, the polyfilm cover 11 becomes relatively thick b, and is therefore strong enough to withstand the effects of wind during transport. This allows the building unit 3 to be covered with a cover of a size that allows for sufficient play. A larger polyfilm cover 11 is strong enough to withstand the effects of wind during transport. Making the polyfilm cover 11 large enough to allow for play makes it easier to attach and detach the building unit 3.

[0090] The fastening belt 37 can securely fasten and fix the polyfilm cover 11, which has a certain amount of play, so that it does not fly off during transportation. The fastening belt 37 can be used to fasten the polyfilm cover 11 at key points, making the fastening work easy.

[0091] The securing belt 37 is in the form of a belt, and is therefore not bulky, making it easy to handle and enabling it to be packed together without taking up space at the construction site 4. [Explanation of symbols]

[0092] 3 Building Units 4 Construction site 10 Pressing member 11 Polyfilm cover 33 Net-like presser cover 37 Cargo tie-down strap

Claims

1. The building unit is covered with a polythene film cover for packaging. The polyfilm cover is pressed down by a pressing member, A method for transporting a building unit in rainy weather, comprising transporting the building unit in rainy weather while keeping the building unit covered with the polyfilm cover.

2. 2. A method for transporting a building unit in rainy weather according to claim 1, comprising the steps of: A method for transporting a building unit in rainy weather, wherein the holding down member is a net-like holding down cover.

3. 2. A method for transporting a building unit in rainy weather according to claim 1, comprising the steps of: The polyfilm cover has a thickness that is wind resistant, A method for transporting a building unit in rainy weather, wherein the holding down member is a cargo securing belt.

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