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JP-2026075988-A - Expandable trailer house, manufacturing method and construction method for an expandable trailer house

JP2026075988AJP 2026075988 AJP2026075988 AJP 2026075988AJP-2026075988-A

Abstract

[Problem] To prevent the accumulation of sand and dust on the rails, reduce wear between the rollers and rails, prevent rusting of the rails, create a simple structure, reduce costs, lessen the weight burden on workers, and ensure sufficient height of the opening. [Solution] The expandable trailer house 1 has a ceiling 21, side walls 22-25, and a floor 26, and comprises a box-shaped main body 2 having a rectangular opening 29 in the side wall 22 in the longitudinal direction L, a frame 3 that can change between a stored state and an expanded state and is attached to the opening 29, and a rail member 4. The frame 3 is divided into a roof panel 31 that is rotatably attached to the upper edge in the longitudinal direction of the opening 29, a floor panel 32 that is rotatably attached to the lower edge in the longitudinal direction L of the opening 29, a left side panel 33 that is rotatably attached to the left edge in the height direction H of the opening 29, a right side panel 34 that is rotatably attached to the right edge in the height direction H of the opening 29, and a front panel 35 that has a roller 35b on its upper edge 35a that can move along the rail member 4. [Selection Diagram] Figure 26

Inventors

  • 齊藤 康貴

Assignees

  • 丸七建設興業株式会社

Dates

Publication Date
20260511
Application Date
20241023

Claims (7)

  1. A box-shaped body having a rectangular opening in the side wall along its length, A body attached to the aforementioned opening, which can change between a retracted state and an extended state, A rail member is provided, The aforementioned structure, A roof panel is rotatably attached to the upper edge in the longitudinal direction of the opening, A floor panel is rotatably attached to the lower edge in the longitudinal direction of the opening, Two side panels are rotatably attached to both sides of the opening in the height direction, A front panel having a roller on its upper edge that is movable along the rail member, It is divided into In the aforementioned storage state, the roof panel, floor panel, side panel, and front panel are erected in the opening in the width direction of the main body, sequentially from the outside to the inside of the main body. The rail member is divided into a long rail and a short rail that is shorter in length than the long rail. The aforementioned long rail is fixed to the back surface of the roof panel, The short rail is fixed inside the main body in the width direction, When the frame changes between the retracted state and the extended state, the roof panel rotates and unfolds so that the long rail and the short rail become continuous, and the front panel is suspended from the rail members and moves. An expandable trailer house featuring [specific features].
  2. The aforementioned short rail has an extendable structure that allows it to be extended and retracted relative to the aforementioned long rail, as described in claim 1.
  3. In the extended state, the width of the roof panel is set to be longer than the width of the floor panel, and the lower end of the front panel abuts against or fits into the front end of the floor panel, according to claim 1.
  4. In the aforementioned storage state, the roof panel closes the opening and becomes a side wall of the main body, according to claim 1.
  5. An expandable trailer house according to claim 1, comprising: a waterproof section provided between the roof panel and the upper edge of the opening; a first waterproof section having an overhanging portion and a downward-sloping portion along the upper edge of the opening; and a second waterproof section having an overhanging portion and a rising portion along the upper edge of the roof panel, wherein the first waterproof section is provided above and opposite to the second waterproof section.
  6. A body manufacturing step involves manufacturing a box-shaped body having a rectangular opening in the side wall in the longitudinal direction, The system includes a frame installation step for attaching a frame that can be changed between a retracted state and an extended state to the aforementioned opening, The frame installation step is, A roller mounting step for attaching rollers to the top edge of the front panel, A rail member preparation step involves preparing rail members that are divided into a long rail and a short rail that is shorter than the long rail, A long rail fixing step for fixing the aforementioned long rail to the back surface of the roof panel, The system includes a short rail fixing step for fixing the short rail in the width direction within the main body, In the aforementioned long rail fixing step and short rail fixing step, when the frame changes between the retracted state and the extended state, the roof panel rotates and unfolds so that the long rail and the short rail become continuous and are fixed so that the rollers of the front panel can pass through. The frame installation step further includes, A side panel installation step involves attaching two side panels to each side of the opening in the height direction so that they can rotate, A floor panel installation step includes rotatably attaching a floor panel to the lower edge in the longitudinal direction of the opening, A roof panel installation step includes rotatably attaching the roof panel to the upper edge in the longitudinal direction of the opening, A front panel installation step involves installing the rollers of the front panel on the short rail, A method for manufacturing an expandable trailer house, characterized by comprising the following:
  7. A box-shaped body having a rectangular opening in the side wall along its length, A body attached to the aforementioned opening, which can change between a retracted state and an extended state, A rail member is provided, The aforementioned structure, A roof panel is rotatably attached to the upper edge in the longitudinal direction of the opening, A floor panel is rotatably attached to the lower edge in the longitudinal direction of the opening, Two side panels are rotatably attached to both sides of the opening in the height direction, A front panel having a roller on its upper edge that is movable along the rail member, Equipped with, A method for constructing an expandable trailer house, wherein the rail member is divided into a long rail and a short rail shorter in length than the long rail, the long rail is fixed to the back surface of the roof panel, and the short rail is fixed within the main body in the width direction, A storage step in which the roof panel, floor panel, side panel, and front panel are in a stored state in which they are erected in the width direction of the main body, in order from the outside to the inside of the main body at the opening of the main body, From the aforementioned stored state, a roof panel rotation step is performed to rotate and unfold the roof panel, A support step for supporting the aforementioned roof panel with a temporary support member, A floor panel deployment step in which the floor panel is rotated and unfolded, A continuous step that connects the short rail and the long rail, A side panel deployment step in which the side panel is rotated and unfolded, The roof panel is supported by a temporary support member, and with the short rail and long rail in a continuous state, the roller of the front panel is moved from the short rail to the end of the long rail, the temporary support member is removed, and the frame is configured into a box frame shape, comprising a front panel deployment step. Construction method for expandable trailer homes.

Description

This invention relates to an expandable trailer house that can be towed by a vehicle, a method for manufacturing an expandable trailer house, and a method for constructing it. The invention described in Patent Document 1 provides a trailer house that allows for smooth insertion and removal of the internal space expansion section and simplifies the structure of the internal space expansion section. To achieve this, the support device for the small room section is composed of a pair of front and rear support roller devices 41, 41. Each support roller device 41 consists of a guide pipe 43 fixed to the underside of the floor of the house body, a support guide pipe 45 slidably inserted into the guide pipe 43, and a support rod 47 slidably inserted into the support guide pipe 45. A vertical-moving roller device 49 is attached to the tip of the support guide pipe 45, and another vertical-moving roller device 49 is attached to the tip of the support rod 47. The invention described in Patent Document 2 is a house with an expandable interior, a method for expanding the interior of the house, and a trailer house. It provides a house with a configuration that prevents a height difference between the main floor panel placed on the floor of the house body when expanded and the internal expansion panel placed in the internal expansion house after expansion. The internal expansion frame comprises a bottom frame portion that is positioned in the gap between the lateral floor portions when pushed in, and rollers mounted above the bottom frame portion at a distance, which travel on guide rails that allow the internal expansion frame to be pulled out and pushed in through an opening in the house body. The invention described in Patent Document 3 proposes a trailer house that, firstly, is easy to move and transport; secondly, is easy to install; thirdly, does not require space for storage, movement, or transport, and can be installed and used in a larger space; and fourthly, can be used for various purposes such as residences, shops, offices, workshops, dormitories, rest areas, and others. This trailer house is towed and has a chassis frame 1, wheels disposed beneath the chassis frame 1, and a house section 3 mounted on the chassis frame 1. The house section 3 comprises a main unit 4 connected and fixed to the chassis frame 1, and a sub-unit 5 assembled inside the main unit 4. Furthermore, a rail section 22 is attached beneath the main unit 4, an extension frame 23 and extension rails 24 are attached to the outside of the chassis frame 1, rollers 25 are attached beneath the sub-unit 5, and connecting parts and lifting legs are attached to the chassis frame 1, etc. The invention described in Patent Document 4 is a camper van in which a basic body with one side open is installed on the cargo bed of a drivable vehicle body, and a movable chamber having a space communicating with the interior of the basic body is arranged to be retractable and retractable relative to the basic body. Furthermore, a movable part of a telescopic drive mechanism, with a fixed part attached to the vehicle body, is connected to the movable chamber, and as needed, the movable chamber can be extended from the basic body using rails and rollers by operating the telescopic drive mechanism. The invention described in Patent Document 5 is a mobile, simple dwelling characterized by a box-shaped structure that forms a main compartment inside, designed to be loadable onto the cargo bed of a vehicle such as a truck or trailer; an auxiliary box-shaped structure that extends outwards from the side of the box-shaped structure, connecting to the main compartment; the auxiliary box-shaped structure that extends outwards from the box-shaped structure expands the interior space, and when the auxiliary box-shaped structure is retracted into the box-shaped structure, the interior space is reduced, allowing for transport. The invention described in Patent Document 6 provides a trailer house that can be expanded to approximately two to three times its towing capacity by unfolding the floor, walls, and roof. It features a mechanism that allows the movable walls to be opened and moved along rails embedded in the floor panels, forming continuous walls with the side wall panels to create walls on all four sides. The invention described in Patent Document 7 proposes an expandable trailer house in which the individual components of a box-frame structure are unfolded without using rails. The structure, which involves folding the side wall components like a screen or rotating the floor and roof components, is described in Figures 2 to 4 and corresponding sections. Patent No. 5002781Patent No. 7085782Japanese Patent Application Publication No. 11-107553Japanese Patent Application Publication No. 55-019657Japanese Patent Application Publication No. 62-233381Utility Model Registration No. 3107648 GazettePatent No. 7199107 This is a front view of the stored state of the expandable trail