Extension type trailer house, and method for manufacturing and constructing extension type trailer house

Abstract

To achieve a cost reduction by preventing the accumulation of sand or the like on a rail to reduce abrasion between a roller and the rail and prevent rust on the rail in a simple structure, and to secure a height of an opening by alleviating a weight burden on an operator.SOLUTION: An extension type trailer house 1 comprises: a box-type body 2 having a ceiling 21, side walls 22 to 25, a floor 26, and having a square opening 29 in the side wall 22 of a length direction L; a skeleton 3 mounted in an opening 29 and changeable between a storage state and an extension state; and a rail member 4, wherein the skeleton 3 is partitioned into a roof panel 31 rotatably mounted on an upper side in the length direction of the opening 29, a left side panel 32 rotatably mounted on a left side in a height direction H of the opening 29, a right side panel 33 rotatably mounted on a right side in the height direction H of the opening 29, a floor panel 34 rotatably mounted on a lower side in the length direction L of the opening 29, and a front panel 35 having a roller 35b movable along the rail member 4 on the upper side 35a.SELECTED DRAWING: Figure 26

Description

[Technical Field]

[0001] The present invention relates to an expandable trailer house that can be towed by a vehicle, and a manufacturing method and construction method for the expandable trailer house. [Background technology]

[0002] The invention of Patent Document 1 provides a trailer house that allows smooth insertion and removal of the internal space expansion section and simplifies the structure of the internal space expansion section, and therefore the small room section support device that supports the small room section is composed of a pair of front and rear support roller devices 41, 41. Each support roller device 41 is composed of a guide pipe 43 fixed to the underside of the floor of the house main body, a support guide pipe 45 slidably inserted into this guide pipe 43, and a support rod 47 slidably inserted into this support guide pipe 45. A vertically movable roller device 49 is attached to the tip of the support guide pipe 45, and a vertically movable roller device 49 is also attached to the tip of the support rod 47.

[0003] The invention of Patent Document 2 relates to a house whose interior can be expanded, a house interior expansion method, and a trailer house, and provides a house configured so that when expanded, there is no difference in height between the main body floor panels placed on the floor inside the house main body and the internal expansion panels placed in the internally expanded house after expansion. The internal expansion frame has a bottom frame part that is arranged in the blank space between the side floor parts when pushed in, and rollers that are attached at a distance above the bottom frame part and run on guide rails that enable the internal expansion frame to be pulled out and pushed in through an opening from the house main body.

[0004] The invention of Patent Document 3 proposes a trailer house that is, first, easy to move and transport; second, easy to install; third, does not require much space for storage, movement, and transportation, and can be installed and used in a wider space; and fourth, can be used for a variety of purposes, including residences, stores, offices, workshops, lodgings, and rest areas. This trailer house is towed and comprises a chassis frame 1, wheels disposed below the chassis frame 1, and a house section 3 mounted on the chassis frame 1. The house section 3 comprises a parent unit 4 connected and fixed to the chassis frame 1, and a child unit 5 nested within the parent unit 4. A rail section 22 is provided below the parent unit 4, extension frames 23 and extension rails 24 are provided on the outer sides of the chassis frame 1, rollers 25 are provided below the child unit 5, and a connecting section and lifting legs are attached to the chassis frame 1, etc.

[0005] The invention of Patent Document 4 is a camper van in which a basic body with an opening on one side is installed in the loading platform of a travellable vehicle body, a movable compartment having a space communicating with the interior of the basic body is arranged so that it can be pulled out and stored relative to the basic body, and the movable part of an extension drive means having a fixed part attached to the vehicle body is connected to the movable compartment, and by operating the extension drive means as needed, the movable compartment can be extended from the basic body using rails and rollers.

[0006] The invention of Patent Document 5 is a mobile simple house characterized in that a box body forming a main room inside is formed so as to be loadable onto the bed of a vehicle such as a truck or trailer, and an auxiliary box body is provided on the side of the box body so as to slide on guide rails by an actuating cylinder, and the auxiliary box body forms a protruding chamber connected to the main room, so that when the auxiliary box body protrudes outward from the box body, the interior space is expanded, and when the auxiliary box body is stored inside the box body, the interior space is reduced, making it possible to transport the house.

[0007] The invention in Patent Document 6 provides a trailer house that can be expanded to a floor area of ​​approximately two to three times its size when towed by unfolding the floor, walls, and roof. The movable walls are opened and moved on rails built into the floor panels, forming four walls that are continuous with the side wall panels.

[0008] The invention of Patent Document 7 proposes an expandable trailer house in which each component of a box-frame structure is unfolded without using rails, and the structure in which each component is unfolded by folding each side wall component like a folding screen and rotating the floor and roof components is shown in Figures 2 to 4 and corresponding parts. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 5002781 [Patent Document 2] Patent No. 7085782 [Patent Document 3] Japanese Patent Application Publication No. 11-107553 [Patent Document 4] Japanese Patent Application Publication No. 55-019657 [Patent Document 5] Japanese Patent Application Publication No. 62-233381 [Patent Document 6] Utility Model Registration No. 3107648 [Patent Document 7] Patent No. 7199107 Summary of the Invention [Problem to be solved by the invention]

[0010] However, although the trailer houses disclosed in Patent Documents 1 to 6 use rails to move the box frame, they have the following problems and are not yet satisfactory.

[0011] In conventional trailer homes, dust and other particles tend to accumulate on the rails, causing wear on the rollers and rails and making the rails prone to rust. Furthermore, the large number of rails and the need for strength make for a complex structure, requiring the rollers and rails to be durable, which increases costs. Furthermore, due to the strength of the rails, there is a limit to how far the width of the five walls of the box frame can be expanded.

[0012] Conventional trailer homes require all five walls of the box frame to be moved simultaneously along rails, and expanding the structure by hand places a heavy burden on the workers.

[0013] Furthermore, in Patent Document 7, due to the waterproofing structure, the horizontal members that make up the box frame also serve as waterproof rising sections (beams), which requires materials to support the roof, resulting in a downward extension, creating a hanging wall where the main body and the extension cross, undermining the sense of unity. Furthermore, in Patent Document 7, the wider the extension width, the larger the horizontal members and waterproof rising sections (beams) that make up the box frame become. The structure uses protruding members and box-shaped grooves on the roof members to prevent wind and rain from blowing in, and the ends are constructed into a box shape, requiring precise and complex construction, which increases costs. Furthermore, the height required for this waterproofing structure results in a low roof height. This results in a low opening height, making it difficult to expand the volume when expanded.

[0014] The trailer house in Patent Document 7 has few walls, so it must be made of a steel frame for strength reasons, and when unfolding the box-frame structure, two side wall members and one side wall member that are connected in half must be unfolded in a sliding manner like a folding screen, which places a heavy burden on the worker. For this reason, from the standpoint of workability, there is a limit to the expansion of the volume when expanding.

[0015] Therefore, the present invention aims to prevent the accumulation of sand and dust on the rails, reduce wear on the rollers and rails, prevent rail rust, have a simple structure, reduce costs, reduce the weight burden on workers, and enable an increase in volume when expanded. [Means for solving the problem]

[0016] In order to solve the above problems, the gist of this invention is to not adopt a method in which the entire five-sided box frame is moved on rails, but rather to divide the box frame into a roof panel, floor panel, left side panel, right side panel, and front panel, and to design the roof panel, floor panel, left side panel, and right side panel so that they can be rotated to open and close, while the front panel is hung from rails and moved under the rails.

[0017] The first invention is a box-shaped main body having a rectangular opening in a side wall in the lengthwise direction, a frame attached to the opening and changeable between a stored state and an expanded state, and rail members, the frame being divided into a roof panel rotatably attached to the upper edge of the lengthwise direction of the opening, two side panels rotatably attached to both sides of the heightwise direction of the opening, a floor panel rotatably attached to the lower edge of the lengthwise direction of the opening, and a front panel having rollers on its upper edge that are movable along the rail members; and side panels are erected in the opening in the width direction of the main body from the outside to the inside of the main body, the rail members are divided into a long rail and a short rail shorter than the long rail, the long rail is fixed to the back surface of the roof panel, and the short rail is fixed inside the main body in the width direction, and when the frame changes between the stored state and the expanded state, the roof panel rotates and unfolds, the long rail and the short rail become continuous, and the front panel is suspended from the rail members and moves.

[0018] The present invention has a structure in which the rail members are not exposed to the outside air, so dust and the like are less likely to accumulate on the rail members, and wear on the rollers and rail members is less likely to occur, making the rail members less prone to rust. Also, the present invention limits the member that moves along the rail members to the front panel rather than the entire body, thereby reducing the weight load on the rail members and the amount of rail members, resulting in a simple structure, improved durability of the rollers and rail members, and cost reduction.

[0019] In this invention, because each panel of the main body is divided and can move independently, the weight load on the worker when changing the main body from the stored state to the expanded state can be reduced. When moving the front panel, the weight load on the rail members can be reduced, and the number of rail members can be reduced, allowing for an increased volume when expanded. This also reduces the burden on the worker.

[0020] In the present invention, it is preferable that the short rail has an expandable structure that allows the rail to be extended or retracted relative to the long rail.

[0021] According to this configuration, the present invention has an extendable structure that allows the rails to be moved in and out from the short rails when changing between the stored state and the expanded state, thereby smoothing the connection between the long rails and the short rails and allowing for smooth movement of the front panel.

[0022] In the expanded state, it is preferable that the width of the roof panel is set longer than the width of the floor panel, the lower end of the front panel fits into the tip of the floor panel, and the floor panel is covered by an extension member extending downward from the front panel.

[0023] With this configuration, the present invention allows the temporary support members that support the roof panels to be supported by the ground rather than the floor panels when the main body changes between the stored state and the expanded state, thereby preventing damage to the floor panels by the temporary support members and preventing rainwater from entering between the front panel and the floor panel.

[0024] In the stored state, the roof panel preferably closes the opening and forms a side wall of the body.

[0025] With this configuration, when the building frame is in the stored state, the present invention allows each panel to be folded upright and stored within the main body, allowing the roof panel to function as an outer cover for the opening. Since the roof panel, which is inherently waterproof, serves as the outer cover for the opening, this is advantageous in terms of waterproofing. In particular, with regard to the floor panels, it is preferable to provide an exposed floor structure on the backside of the floor panels for strength reinforcement and support the floor structure with jacks, but since the floor panels are not exposed to the outside in the stored state, providing such an exposed floor structure on the backside of the floor panels eliminates concerns about waterproofing the floor panels and does not detract from the aesthetic appearance of the house in the stored state.

[0026] It is preferable that a waterproof section is provided between the roof panel and the upper edge of the opening, the waterproof section comprising a first waterproof section having a protruding section and a falling section provided along the upper edge of the opening, and a second waterproof section having a protruding section and a rising section provided along the upper edge of the roof panel, and the first waterproof section is provided opposite and above the second waterproof section.

[0027] With this structure, the present invention can prevent rainwater from seeping in at least in the expanded state, and the waterproofing is easy to install and does not require height for the waterproofing structure, so the roof height does not need to be lowered. This reduces the burden of waterproofing measures.

[0028] The second invention comprises a body manufacturing step of manufacturing a box-shaped body having a rectangular opening in a side wall in the length direction, and a body installation step of attaching a body that can be changed between a stored state and an expanded state to the opening, the body installation step including a side panel installation step of attaching two rotatable side panels to both sides in the height direction of the opening, a roller installation step of attaching rollers to the upper side of the front panel, a rail member preparation step of preparing a rail member divided into a long rail and a short rail that is shorter than the long rail, a long rail fixing step of fixing the long rail to the back surface of a roof panel, and a mounting step of fixing the short rail to the body. and a short rail fixing step for fixing the roof panel in the width direction within the long rail fixing step, wherein in the long rail fixing step and the short rail fixing step, when the body changes between the stored state and the extended state, the roof panel rotates and unfolds so that the long rails and the short rails are continuous and the front panel is fixed so that the rollers can pass through, and the body installation step further comprises a floor panel installation step for rotatably attaching a floor panel to the lower edge of the opening in the lengthwise direction, and a roof panel installation step for rotatably attaching the roof panel to the upper edge of the opening in the lengthwise direction.

[0029] The second invention has the same effect as the first invention.

[0030] The third invention includes a storing step of placing a body that can be changed between a stored state and an expanded state in a stored state in which a roof panel, floor panels, front panel, and side panels are arranged in order from the outside to the inside of the body in the width direction of the body at an opening of the body; a roof panel rotating step of rotating and expanding the roof panel from the stored state; a supporting step of supporting the roof panel with temporary support members; a floor panel expanding step of rotating and expanding the floor panel; a connecting step of connecting the short rails and the long rails; an abutting step of moving the rollers of the front panel from the short rails to the ends of the long rails while the roof panel is supported by temporary support members and the short rails and long rails are continuous, removing the temporary support members, and abutting the front panel against the floor panel; and a side panel expanding step of rotating and expanding the side panels to form the body into a box frame shape. This is a construction method for an expandable trailer house that includes the above.

[0031] The third invention has the same effects as the first and second inventions. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 1 is a front view of the expandable trailer house of the embodiment of the present invention in a stored state. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5. [Figure 8] FIG. 1 is a front view of an expandable trailer house according to an embodiment of the present invention in an expanded state. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] 13 is a cross-sectional view taken along the line XIII-XIII in FIG. 8. [Figure 14] This is a reference diagram of the same cross section with added facilities such as a kitchen and bathtub. [Figure 15] This is a left side view of the unfolded 1. [Figure 16] 16 is a cross-sectional view taken along line XVI-XVI of FIG. 15. [Figure 17] FIG. 1 is a plan view of the unfolded portion 1. [Figure 18] 18 is a cross-sectional view taken along the line XVIII-XVIII in FIG. 17. [Figure 19] This is a left side view of the unfolded part 2. [Figure 20] 20 is a cross-sectional view taken along the line XX-XX in FIG. 19. [Figure 21] FIG. 2 is a plan view of the unfolded state 2. [Figure 22] 22-XXII cross-sectional view of FIG. 21. [Figure 23] This is a left side view of the unfolded part 3. [Figure 24] 24-24 cross-sectional view of FIG. 23. [Figure 25] This is a plan view of the unfolded state 3. [Figure 26] 26 is a cross-sectional view taken along line XXVI-XXVI of FIG. 25. [Figure 27] This is a left side view of the unfolded part 4. [Figure 28] 28 is a cross-sectional view taken along the line XXVIII-XXVIII in FIG. 27. [Figure 29] FIG. 4 is a plan view of the unfolded state 4. [Figure 30] This is a cross-sectional view taken along the line XXX-XXX in Figure 29. [Figure 31] This is a left side view of the unfolded portion 5. [Figure 32] This is a cross-sectional view of Figure 31 taken along the line XXXII-XXXII. [Figure 33](a) is a partial enlarged view of part A in Figure 7 (the floor panel and left side panel are omitted), (b) is a partial enlarged view of part A in Figure 18 (the floor panel and left side panel are omitted), (c) is a partial enlarged view of part A in Figure 26 (the left side panel is omitted and the front panel in the middle of moving has been added for reference), and (d) is a partial enlarged view of part A in Figure 30 (the left side panel is omitted). [Figure 34] FIG. [Figure 35] (a) A cross-sectional view including the back surface of the front panel, (b) a cross-sectional view of the rail, (c) a front view of the same, and (d). [Figure 36] FIG. 2 is a vertical cross-sectional view of the waterproof section and its surrounding members. DETAILED DESCRIPTION OF THE INVENTION

[0033] 1 to 36, an expandable trailer house 1 (hereinafter referred to as the house) according to an embodiment of the present invention comprises a box-shaped main body 2 having a ceiling 21, a left wall 22 and a right wall 23 in a length direction L, a front wall 24 in a width direction W, a rear wall 25 in the width direction W having a door 25a, and a floor 26, the box-shaped main body 2 having an opening 29 (see FIGS. 13, 18, etc.) with a rectangular opening in the side wall 22, and a skeleton 3 attached to the opening 29 and changeable between a stored state and an expanded state. Behind the opening 29, a wall 22a extends inward in the width direction W (see FIG. 6, etc.).

[0034] 6, 7, etc., the skeleton 3 is divided into a roof panel 31 rotatably attached to the upper side of the opening 29 in the length direction L, a left side panel 32 rotatably attached to the left side of the opening 29 in the height direction H, a right side panel 33 rotatably attached to the right side of the opening 29 in the height direction H, a floor panel 34 having a floor frame 34a (see FIG. 34) rotatably attached to the lower side of the opening 29 in the length direction L, and a front panel 35 having rollers 35b fixed to an upper side 35a with fastening material 35d (see FIGS. 33(b) to (d)) and provided with a window 35c. One end of the floor panel 34 is rotatably attached to the vertical surface of the cutout 26a of the floor 26 by a hinge, as shown in FIG. 34.

[0035] Here, the names of the left wall 22, right wall 23, front wall 24, and rear wall 25 of the main body 2 are based on the direction of travel when the house 1 is towed, rather than on the arrangement when the house 1 is installed, and are named based on the front, back, left, and right, with the front of the traveling direction being the front, the rear of the traveling direction being the rear, and when looking at the house 1 from the traveling direction (see Figure 4), the right side is the right and the left side is the left.

[0036] A fixed wall 22a extends from the opening 29 in the left wall 22 in the width direction W and forms a free end. A left side panel 32 is attached to this fixed wall 22a with a hinge. A right side panel 33 is attached to the inner wall side of the front wall 24 with a hinge.

[0037] The upper surfaces of the left and right side panels 32, 33 are sloped to match the slope of the roof panel 31.

[0038] As shown in FIG. 33, the house 1 further has a rail member 4 divided into a long rail 41 and a short rail 42 that is shorter than the long rail 41. Two rail members 4 and two rollers 35b are illustrated, but the number is not limited and any appropriate number may be used. The load-bearing capacity of the rollers is illustrated as 300 to 600 kg. The rail member 4 is arranged to extend in the width direction W in the expanded state. The long rail 41 is fixed to the back surface of the roof panel 31 so as to extend in the width direction W in the expanded state, and the short rail 42 is axially extendable and is fixed to a fixing member 5 provided on the main body 2 so as to extend in the width direction W. When the roof panel 31 rotates and unfolds, the long rail 41 and the short rail 42 are configured to be coaxially continuous. When the body 3 changes between the stored state and the extended state, the rollers 35b move between the long rail 41 and the short rail 42, and the front panel 35 moves while suspended from the coaxial rail member 4. In this embodiment, the short rail 42 has an extendable structure, and the long rail 41 and the short rail 42 are configured to be coaxially continuous when the body 3 changes between the stored state and the extended state; however, as long as the continuity between the long rail 41 and the short rail 42 is maintained so that the rollers 35b of the front panel 35 can pass when the body 3 changes between the stored state and the extended state, the short rail 42 does not have to be extendable, and the long rail and the short rail do not have to be coaxial.

[0039] In the house 1, the rail members 4 are not exposed to the outside air, so dust and the like are less likely to accumulate on the rail members 4, and the rollers 35b and the rail members 4 are less likely to wear out, making the rail members 4 less likely to rust. In addition, in the house 1, the panels 31 to 35 of the skeleton 3 are divided, and only the front panel 35 moves along the rails 4, rather than the entire skeleton 3, reducing the weight of the moving members, thereby reducing the weight load on the rail members 4. This reduces the amount of rail members 4, resulting in a simpler structure, improved durability of the rollers 35b and the rail members 4, and reduced costs.

[0040] In the house 1, each panel 31-35 of the skeleton 3 is separate and can move independently, which reduces the weight burden on workers when changing the skeleton 3 between the stored state and the expanded state. By limiting the member that moves along the rail member 4 to the front panel 35 and reducing the weight of the member to be moved, the weight burden on the rail member 4 can be reduced, and the amount of rail member 4 can also be reduced, allowing the width of the expanded volume to be increased. Furthermore, because the roof panel 31 is separate, the height of the opening 29 can be ensured.

[0041] When viewed from the back, the floor panel 34 has an exposed floor frame 34a (see Figure 34) to maintain strength. Considering strength, the floor frame 34a is usually in a lattice shape, but it can also be arranged in a river shape that flows in one direction instead of a lattice shape.

[0042] Here, the names of the left side panel 32, right side panel 33, and front panel 35 of the skeleton 3 provided on the left wall 22 side are determined based on the front view when the house is in the expanded state as shown in Fig. 8, and the panel located on the front is named as the front panel 35, the panel located on the left side as seen from the front view as the left side panel 32, and the panel located on the right side as seen from the front view as the right side panel 33. Also, with respect to the skeleton provided on the right wall 23 side, the panel located on the back is named as the front panel 35, the panel located on the left side as seen from the rear view as the left side panel 32, and the panel located on the right side as seen from the rear view as the right side panel 33, based on the rear view when the house is in the expanded state as shown in Fig. 9.

[0043] When the jack 12 supports the floor panel 34, after placing the jack 12 on the ground, the jack auxiliary member 12a, which is a square timber, is placed over the jack 12, and after leveling the jack auxiliary member 12a, the jack auxiliary member 12a is used to support the floor frame 34a, thereby ensuring the levelness and strength of the floor panel. In this way, the presence of the floor frame 34a exposed on the back surface of the floor panel 34 improves the strength of the floor and the ease of installation of the jack. However, if the floor panel 34 is configured so that it is positioned on the outermost side in the stored state, it would be necessary to apply a waterproofing material to cover the floor frame 34a to waterproof the floor panel 34, which would prevent the floor frame 34a from being exposed, making it difficult to position and install the jack.

[0044] In this embodiment, the roof panel 31 (the outside of the roof panel 31 is originally waterproof) can function as an outer cover for the opening 29, so that the floor structure 34a is not exposed to the outside in the stored state, and the exposed floor structure 34a can be provided on the back surface of the floor panel 34 without worrying about waterproofing, and the aesthetic appearance of the house 1 in the stored state is not impaired.

[0045] The long rail 41 is fixed to the back surface of the roof panel 31 (see Figure 35), and the short rail 42 has an extendable structure that allows the rail to be moved in and out relative to the long rail 41. The outer end of the long rail 41 serves as a restricting or blocking part to prevent the front panel 35 from falling out. The inner end of the short rail 42 serves as a restricting or blocking part to prevent the front panel 35 from falling out. The restricting or blocking part of the short rail 42 does not have to be provided.

[0046] With this configuration, when house 1 changes between the stored state and the extended state, short rails 42 can be moved in and out of relation to long rails 41, allowing for smooth movement of front panel 35. As shown in Figure 30, when the movement and installation of front panel 35 is complete and the rail members 4 are disconnected, long rails 41 are inclined, but when rail members 4 are connected in a continuous state for moving front panel 35, as shown in Figure 22, rail members 4 are not inclined. The long rails 41 are inclined in Figure 30 because roof panel 31 is inclined for waterproofing reasons.

[0047] When the main body 3 is in an expanded state, the width of the roof panel 31 is set longer than that of the floor panel 34, and the lower end of the front panel 35 abuts against the tip of the floor panel 34, but in some cases they may be fitted together, and the floor panel 34 may be covered with an extension member (not shown) extending downward from the front panel 35 to create a waterproof structure.

[0048] With this configuration, when the body 3 of the house 1 changes between the stored state and the expanded state, the temporary support members 7 (see Figures 15, 18, etc., illustrations are omitted as appropriate) that support the roof panel 31 can be supported by the ground rather than by the floor panel 34, which prevents the temporary support members 7 from damaging the floor panel 34 and also prevents rainwater from entering between the front panel 35 and the floor panel 34.

[0049] In the stored state, the roof panel 31 closes the opening 29 and forms a side wall of the main body 2.

[0050] With this configuration, when the structure 3 of the house 1 is in the stored state, each panel 31 to 35 can be folded upright and stored within the main body 2, and the roof panel 31 can function as an outer cover for the opening 29.As a result, even if the floor structure 34a is exposed on the back side of the floor panel 34, as mentioned above, there is no problem with waterproofing the floor panel 34 in the stored state, and the aesthetic appearance of the house 1 in the stored state is not impaired.

[0051] As shown in Figure 33 and other figures, a waterproof section 6 is provided between the roof panel 31 and the upper edge of the opening 29. The waterproof section 6 includes a first waterproof section 61 having a protruding section 61a and a descending section 61b provided on the left wall 22 above the upper edge of the opening 29, a second waterproof section 62 having a protruding section 62a and a rising section 62b provided along the upper edge of the roof panel 31, a waterproof space 65 defined by the first waterproof section 61 and the second waterproof section 62, and a waterproof gasket 66 (shown in Figure 36) provided at the lower end of the first waterproof section 61. The waterproof gasket 66 is made of soft rubber and collapses once, then returns to its original shape due to its elasticity when the roof panel 31 is stored. The first waterproof section 61 is installed above and facing the second waterproof section 62. In addition to the waterproof effect provided by the waterproof space 65 defined by the first waterproof portion 61 and the second waterproof portion 62, the waterproof packing 66 seals the gap between the first waterproof portion 61 and the second waterproof portion 62, enhancing watertightness.

[0052] This structure not only prevents rainwater from seeping into the house 1 at least in the expanded state, but also makes waterproofing easier and allows for a structure that does not require a lower roof height, thereby reducing the burden of waterproofing measures.

[0053] The house 1 also includes a chassis 10 having wheels 8, a towing unit 9, a framework 14a in a length direction L, a framework 14b in a width direction W, and an anti-entanglement member 13, as well as stakes 11 for fixing the towing unit 9 to the ground, jack auxiliary members 12a, and a jack 12. The floor 26 of the main body 2 is fixed onto the chassis 10 with fastening members.

[0054] The house 1 of this embodiment has a structure in which the rail members 4 are not exposed to the outside air, so that dust and the like are less likely to accumulate on the rail members 4, and the rollers 35b and the rail members 4 are less likely to wear, making the rail members 4 less likely to rust. Furthermore, by using the front panel 35 that moves along the rail members 4, the house 1 can reduce the weight load on the rail members 4 and the amount of rail members 4, resulting in a simple structure, improved durability of the rollers 35b and the rail members 4, and cost reduction.

[0055] In the house 1, each panel 31 to 35 of the skeleton 3 is separate and can operate independently, so the weight load on workers can be reduced when changing the skeleton 3 between the stored state and the expanded state. When moving the front panel 35, the weight load on the rail members 4 can be reduced, and the amount of rail members 4 can also be reduced, allowing for an increased volume when expanded. This also reduces the burden on workers.

[0056] In this embodiment, the floor panel 34 has an exposed floor structure 34a for maintaining strength when viewed from the back. When the jack 12 supports the floor panel 34, after placing the jack 12 on the ground, a jack auxiliary member 12a, which is a square timber, is placed over the jack 12, and after the jack auxiliary member 12a is leveled, the jack auxiliary member 12a supports the floor structure 34a, thereby ensuring the levelness and strength of the floor panel.

[0057] In this case, because the floor frame 34a is exposed on the back of the floor panel 34, the position of the floor frame 34a can be seen when the floor panel 34 is unfolded, facilitating the work of aligning the jack 12 with the floor frame 34a and improving the ease of installation of the jack. However, if the floor panel 34 is configured to be positioned on the outermost side in the stored state, from the perspective of waterproofing the floor panel 34, it is necessary to cover the floor frame 34a with a waterproof finishing material (exterior wall material, etc.) or to cover it with a sheet or the like during transportation and storage. If covered with a finishing material, the floor frame 34a cannot be exposed, making it difficult to position the jack.

[0058] Furthermore, because the finishing material comes into contact with the jack, there is a risk of the finishing material cracking, denting, or being damaged, and it becomes susceptible to the effects of weather, such as wind and rain. If the floor members are covered with a sheet or the like, a sheet large enough to cover the trailer house is required, which makes the work of covering with the sheet or the like a heavy burden and increases costs. In this embodiment, the roof panel 31 (the outside of the roof panel 31 is originally waterproof) can function as an outer cover for the opening 29, so that the floor panel 34 is not exposed to the outside in the stored state, and the above-mentioned inconveniences do not occur.

[0059] In this embodiment, the jack auxiliary member 12a and its leveling are used to make jack installation more efficient, but the jack auxiliary member 12a and its leveling can be omitted as appropriate.If omitted, it becomes even more important that the roof panel 31 is positioned at the outermost position in the stored state in order to position the jack 12 and the floor structure 34a and to prevent damage to the waterproof finishing material by the jack 12.

[0060] A method for manufacturing an expandable trailer house will now be described. This manufacturing method includes a main body manufacturing step in which a box-shaped main body 2 having a rectangular opening 29 in a longitudinal side wall 22 is manufactured, a fixing member 5 is provided to be fixed to the main body 2, and a fixing wall 22a is provided on the left side of the opening 29 in the height direction; and a main body installation step in which a main body 3 that can be changed between a stored state and an expanded state is attached to the main body 2. The main body installation step includes the following steps. Note that the steps do not necessarily have to be performed in the order described.

[0061] A side panel installation step is performed in which the left side panel 32 is rotatably attached with a hinge to the fixed wall 22a provided on the left side of the opening 29 in the height direction, and the right side panel 33 is attached with a hinge to the inner wall side of the front wall 24 located on the right side of the opening 29 in the height direction.

[0062] A roller attachment step is performed in which rollers 35b are attached to the upper side 35a of the front panel 35.

[0063] A rail member preparation step is carried out to prepare a rail member 4 that is divided into a long rail 41 and a short rail 42 that is shorter than the long rail 41 and is extendable in the axial direction.

[0064] A long rail fixing step is carried out to fix the long rail 41 to the back surface of the roof panel 31.

[0065] A short rail fixing step is performed in which the short rail 42 is fixed to the fixing member 5 inside the main body 2 in the width direction.

[0066] In the long rail fixing step and the short rail fixing step, the long rail 41 and the short rail 42 are fixed so that they are continuous when the body 3 transitions between the stored state and the extended state, and the rollers 35b of the front panel 35 can pass between the long rail 41 and the short rail 42. Note that in this embodiment, the telescopic short rail is configured to be extended to connect the short rail 42 to the long rail 41, but the short rail 42 does not need to have an telescopic structure as long as continuity is obtained that allows the rollers 35b of the front panel 35 to pass through.

[0067] A floor panel installation step is performed in which the floor panel 34 is rotatably attached to the lower side of the opening 29 in the length direction L with a hinge.

[0068] A roof panel installation step is carried out in which the roof panel 31 is rotatably attached to the upper edge of the opening 29 in the longitudinal direction by a hinge.

[0069] This manufacturing method for an expandable trailer house has the same effects as House 1.

[0070] The construction method for the expandable trailer house of the present invention will now be described. This method comprises the following steps. Note that the steps do not necessarily have to be performed in the order listed.

[0071] A storage step is performed to change the body 3, which is composed of a roof panel 31, a left side panel 32, a right side panel 33, a floor panel 34, and a front panel 35 and can change between a stored state and an expanded state, into a stored state in which the roof panel 31, the floor panel 34, the front panel 35, the left side panel 32, and the right side panel are arranged in order from the outside to the inside of the body 2 in the width direction W of the body 2 at the opening 29.

[0072] A roof panel rotation step is performed in which the roof panel 31 is rotated and unfolded from the stored state (see Figures 15 to 18).

[0073] A supporting step is carried out in which the roof panel 31 is horizontally supported by the temporary support members 7 (see FIGS. 15 to 18).

[0074] After the jack 12 and the jack auxiliary member 12a are placed on the ground, a floor panel unfolding step is performed in which the floor panel 34 is rotated and unfolded (see Figures 19 to 22).

[0075] A continuous step is performed in which the extendable short rail 42 is extended to connect the short rail 42 and the long rail 41 coaxially (see FIG. 22). Note that in this embodiment, the extendable short rail is extended to connect the short rail 42 and the long rail 41 coaxially, but as long as continuity is obtained that allows the rollers 35b of the front panel 35 to pass through, it is not necessary for the short rail 42 to be extendable or for both rails to be coaxial. Also, in the embodiment, in the state of FIGS. 19 to 12, the short rail 42 and the long rail 41 are both horizontal and coaxial, but even if only the long rail 41 is slightly inclined, it is sufficient as long as they are continuous, and both rails do not necessarily have to be coaxial.

[0076] With the roof panel 31 supported horizontally on the ground by the temporary support members 7 and the short rails 42 and long rails 41 continuous, the roller 35b of the front panel 35 is moved from the short rail 42 to the end 41a of the long rail 41, causing the short rail 42 to contract and separate the short rail 42 from the long rail 41, the temporary support members 7 are removed, and an abutting step is performed in which the front panel 35 is abutted against the floor panel 34 from above (see Figures 23 to 30). Note that in this embodiment, the short rails 42 and long rails 41 are separated from each other before the temporary support members 7 are removed, but they may remain continuous depending on the configuration of the rail members.

[0077] The left side panel 32 and the right side panel 33 are rotated and unfolded to form the body into a box-frame shape (see Figures 31 and 32).

[0078] The construction method for an expandable trailer house of the present invention has the same effects as the method for manufacturing the house 1 and the expandable trailer house.

[0079] Although the present embodiment has been described above, it goes without saying that various modifications and additions to the present invention can be made without departing from the spirit of the present invention. For example, the main body 2, opening 29, framework 3, roof panel 31, left side panel 32, right side panel 33, floor panel 34, front panel 35, rail member 4, fixing member 5, waterproof portion 6, etc. in this embodiment are not limited to the shapes and structures shown in the drawings, and any other suitable shapes, structures, or combinations thereof can be adopted. The front panel 35 may be provided with an extension member (not shown) at its tip to provide a waterproof structure (see Figure 27, etc.). [Industrial Applicability]

[0080] Expandable trailer houses have great industrial applicability because they can be put into practical use by overcoming manufacturing difficulties. [Explanation of symbols]

[0081] 1 Expandable trailer house (house) 2 Main unit 21 Ceiling 22 Left side wall 23 Right side wall 24 Front wall 25 Back wall 26 beds 29 Opening 3 skeleton 31 Roof Panel 32 Left side panel 33 Right side panel 34 Floor Panel 35 Front Panel 35a Top 35b Laura 35c window 4 Rail components 41 Long rail 42 Short rail 5 Fixing member 6 Waterproof part 7 Temporary support member 8 wheels 9 Traction section 10 chassis 11 stake

Claims

1. a box-shaped main body having a rectangular opening in a side wall in the longitudinal direction; A body attached to the opening and changeable between a stored state and an expanded state; a rail member; The body is a roof panel rotatably attached to an upper edge of the opening in the longitudinal direction; two side panels rotatably attached to both sides of the opening in the height direction; a floor panel rotatably attached to a lower side of the opening in the longitudinal direction; a front panel having a roller on an upper edge thereof that is movable along the rail member; that is divided into In the stored state, the roof panel, floor panel, front panel, and side panel are erected in the opening in the width direction of the main body from the outside to the inside of the main body in that order. The rail member is divided into a long rail and a short rail that is shorter than the long rail, the long rail is fixed to the underside of the roof panel; The short rail is fixed in the body in the width direction, When the body changes between the stored state and the expanded state, the roof panel rotates and unfolds, the long rail and the short rail become continuous, and the front panel is suspended from the rail member and moves. An expandable trailer house that features:

2. 2. The expandable trailer house according to claim 1, wherein the short rails have an extendable structure that allows the rails to be extended or retracted relative to the long rails.

3. 2. The expandable trailer house of claim 1, wherein in the expanded state, the width of the roof panel is set longer than the width of the floor panel, and the lower end of the front panel abuts against or fits into the tip of the floor panel.

4. 2. The expandable mobile home of claim 1, wherein in the stored state, the roof panel closes the opening and forms a side wall of the main body.

5. 2. The expandable trailer house of claim 1, wherein a waterproof section is provided between the roof panel and the upper edge of the opening, the waterproof section comprising a first waterproof section having an overhanging section and a descending section provided along the upper edge of the opening, and a second waterproof section having an overhanging section and a rising section provided along the upper edge of the roof panel, the first waterproof section being provided opposite and above the second waterproof section.

6. a body manufacturing step of manufacturing a box-shaped body having a rectangular opening in a side wall in the longitudinal direction; a body installation step of installing a body that can be changed between a stored state and an expanded state in the opening, The body installation step includes: a side panel installation step of rotatably attaching two side panels to both sides of the opening in the height direction; a roller attachment step for attaching a roller to the upper edge of the front panel; a rail member preparation step of preparing a rail member to be divided into a long rail and a short rail shorter than the long rail; a long rail fixing step for fixing the long rail to the back surface of the roof panel; a short rail fixing step for fixing the short rail in the width direction within the main body, In the long rail fixing step and the short rail fixing step, when the body changes between the stored state and the expanded state, the roof panel rotates and unfolds, the long rail and the short rail become continuous, and the front panel is fixed so that the rollers can pass through. The body installation step further includes: a floor panel installation step of rotatably attaching a floor panel to a lower side of the opening in a longitudinal direction; a roof panel installation step of rotatably attaching the roof panel to an upper side of the opening in the longitudinal direction; A method for manufacturing an expandable trailer house, comprising:

7. a storing step of setting the body, which can be changed between a stored state and an expanded state, to a stored state in which the roof panel, floor panel, front panel, and side panels are erected in order from the outside to the inside of the body in the width direction of the body at the opening of the body; a roof panel rotating step of rotating and unfolding the roof panel from the stored state; a supporting step of supporting the roof panel with a temporary support member; a floor panel unfolding step for rotating and unfolding the floor panel; a connecting step of connecting the short rail and the long rail; a butting step of moving rollers of the front panel from the short rails to the ends of the long rails while the roof panel is supported by temporary support members and the short rails and long rails are continuous, removing the temporary support members, and butting the front panel against the floor panel; a side panel unfolding step of rotating and unfolding the side panels to form the body into a box frame shape; Equipped with How to build an expandable trailer home.

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