JP5945980B2 - Temporary toilet unit - Google Patents

Description

The present invention relates to a temporary toilet unit, and more particularly, to a temporary toilet unit capable of simplifying maintenance or curing while improving transportability, assembling property, and use convenience.

Conventionally, temporary toilet units are used in parks, playgrounds, construction sites, beaches, and the like.

Temporary toilet units are assembled at the site of use, installed in a form that is exposed to the outside air for a predetermined period of time as required, and removed when the period ends, so transportability, assembly and durability are required, From the standpoint of assembly, lightweight is required, but from the viewpoint of durability, high rigidity is required. In order to satisfy the conflicting requirements of lightweight and high rigidity, a panel-type resin temporary toilet unit is required. It has been adopted.
Patent Document 1 discloses an example of such a resin temporary toilet unit.

This resin-made temporary toilet unit assembles a door member as a panel member, left and right side wall members, and a rear wall member with respect to the four side edges of a floor member placed on the upper surface of the toilet tub, and the upper ends of these members It is completed by placing a roof member on the part. The door member as the panel member, the left and right side wall members, and the rear wall member are all blow molded as a hollow double wall structure in which a front plate and a back plate made of a hard thermoplastic resin are opposed to each other at a predetermined interval. It is manufactured by.
According to such a resin-made temporary toilet unit, since the panel member has a hollow double wall structure, it achieves weight reduction and has a structure in which the peripheral edges of the front plate and the back plate are integrally welded to some extent. On the other hand, the hollow portion exhibits a certain degree of heat insulation and sound insulation.
However, such a temporary resin toilet unit has the following technical problems.
That is, it is inadequate in terms of weight reduction and high rigidity, and is inferior in terms of use benefits such as heat insulation and sound insulation.

More specifically, regarding the weight reduction and high rigidity of the first half, in the hollow double wall structure in which the peripheral edges of the front and back plates are integrally welded, the strength tends to be insufficient due to the presence of the hollow portion. The position of the center level in the height direction of the back plate and the back plate has low bending rigidity with respect to the lateral load of the front plate and the back plate, and the height of the front plate and the back plate is about 2 m or more that is a temporary toilet unit. Since it is necessary, the bending rigidity is further reduced.
In order to prevent such a decrease in bending rigidity, in practice, a plurality of recesses are provided on either the front plate or the back plate. By abutting against the plate, a plurality of ribs are provided between the front plate and the back plate, thereby improving the rigidity.
However, due to the provision of the plurality of recesses, the ease of maintenance or curing of the temporary resin toilet unit is deteriorated.

More specifically, when a plurality of recesses are provided in the front plate, the front plate is exposed to the outside air, so that the inside of each recess is cleaned even though dust and dirt are likely to accumulate in the plurality of recesses. Takes time. On the other hand, when a plurality of recesses are provided on the back plate, dirt associated with the use of the resin temporary toilet unit tends to accumulate in the plurality of recesses, and cleaning is troublesome despite lacking in cleanliness.

On the other hand, regarding heat insulation or sound insulation in the latter half, more specifically, it is possible to ensure a certain degree of heat insulation or sound insulation through the air layer in the hollow part, but ensure sufficient heat insulation or sound insulation. In order to do so, it is necessary to secure the thickness of the hollow portion (air layer) to some extent, and the rigidity decreases accordingly. In particular, if such a hollow part is used to ventilate a strange odor in the temporary toilet unit, it is necessary to provide a vent for ventilating to the outside air, resulting in a sealed hollow part. It cannot be performed, and the heat insulating property or sound insulating property deteriorates excessively.
Reality 6-38996

In view of the above technical problems, an object of the present invention is to provide a temporary toilet unit capable of simplifying maintenance or curing while improving transportability, assembling property, and use convenience.

In order to achieve the above object, the temporary toilet unit of the present invention is
The first side panel is connected to one side edge of the door panel, the second side panel is connected to the other side edge of the door panel, the back panel is connected to the side edges of the first side panel and the second side panel,
A temporary toilet unit that forms a panel-type assembly structure that forms a sealed space in which a toilet is provided by the door panel, the first and second side panels, and the back panel,
At least one of the door panel, the first and second side panels, and the back panel has a sandwich panel structure,
The sandwich panel has a pair of skin material sheets and a resin core material welded to each of the pair of skin material sheets, and forms a side wall by welding and integrating the ends of the pair of skin material sheets. ,
A gap is formed between the side wall of the outer periphery of the sandwich panel and the outer periphery of the core member.
The core material may have a foamed resin structure having a predetermined thickness and / or a predetermined expansion ratio.
Further, the sandwich panel may have a flat structure having no concave rib on the surface of the panel.

An embodiment of a temporary toilet unit according to the present invention will be described below in detail with reference to the drawings.
In the embodiment of the present invention, as shown in FIGS. 1 to 4, the temporary toilet unit 10 is a panel-type resin unit, and is attached to each of the four peripheral edges of the toilet tub 12 and the floor panel 14 of the stool 12. The door panel 16, the first side panel 18, the second side panel 20, and the back panel 22, and the upper peripheral end constituted by the door panel 16, the first side panel 18, the second side panel 20, and the back panel 22. The ceiling panel 24 is generally arranged, and a sealed space 25 is formed in the interior by the door panel 16, the first side panel 18, the second side panel 20, and the back panel 22.

The toilet 12 is made of resin, has a rectangular floor panel 14 on the upper surface, a ceramic toilet 26 is installed at a substantially central portion of the upper surface, and a through-hole is provided as a discharge path below the toilet 26. 11 is provided, and a step 28 is provided at the front edge where the door panel 16 described later is installed for the convenience of the user. Such a three-dimensional toilet bowl 12 is manufactured by integral blow molding, and is provided with a hollow portion 13 (see FIG. 4). Therefore, the weight can be reduced, and the toilet bowl 12 is transported to the site. Is advantageous. Further, as will be described later, these five panels (door panel 16, first side panel 18, second side panel 20, back panel 22 and ceiling panel 24) installed on the upper surface of the floor panel 14 are reduced in weight. Since the load applied to the toilet tub 12 that supports the weight of the panel is reduced, it is possible to further reduce the weight by reducing the thickness of the toilet tub 12, for example. As shown in FIG. 4, the floor panel 14 is provided with a rib 67 protruding by integrally bending the lower plate, and the tip of the rib 67 is welded integrally with the upper plate so that a hollow portion is formed inside. The temporary toilet unit 10 is configured to sufficiently withstand the compressive load on the floor panel 14 during use.

The door panel 16 is a resin panel having a handle 69 that is bent by integrally bending the surface material, and the lower end portion 30 is connected and fixed to the upper surface of the floor panel 14. The first side panel 18 is a floor panel. 14 is a resin panel having a lower end portion 34 connected and fixed to the upper surface of the door panel 16 and connected to one side edge 32 of the door panel 16, and the second side panel 20 has a lower end portion 38 connected and fixed to the upper surface of the floor panel 14. The back panel 22 is connected and fixed to the upper surface of the floor panel 14, and the first side panel 18 and the second side panel 20 are connected to the other side edge 36 of the door panel 16. The resin panels connected to the respective side edges 37 and 39, and the four panels installed on the upper surface of these floor panels 14 have the same structure. Described in detail one, description of the other panel will be omitted.

As shown in FIG. 5, the first side panel 18 includes a pair of resin skin sheets 44 </ b> A and 44 </ b> B in which the respective peripheral edges 40 </ b> A and B are welded to form a hollow portion 42 therein, A sandwich panel structure in which the resin core material 46 is disposed integrally between the skin material sheets 44 and disposed in the hollow portion 42 to be welded to each of the pair of skin material sheets 44A and 44B. The core material 46 has a foamed resin structure having a predetermined thickness and / or a predetermined expansion ratio.

Examples of the resin that forms the core material 46 include polyolefins (for example, polypropylene and high-density polyethylene) that are homopolymers or copolymers of olefins such as ethylene, propylene, butene, isoprenepentene, and methylpentene, polyamide, polystyrene, Acrylic derivatives such as polyvinyl chloride, polyacrylonitrile, ethylene-ethyl acrylate copolymers, polycarbonates, vinyl acetate copolymers such as ethylene-vinyl acetate copolymers, terpolymers such as ionomers, ethylene-propylene-dienes, acrylonitrile -Styrene copolymer, ABS resin, polyphenylene oxide, polyacetal, phenol resin, polymethacrylimide, polyetherimide and the like. In addition, these may be used individually by 1 type, or may mix and use 2 or more types. In particular, by using the same material for the core material 46 and the skin material sheet 44, the core material 46 and the skin material sheet 44 can be bonded without using a solvent or the like by heat welding. The core material 46 may contain an additive. Examples of the additive include silica, mica, talc, calcium carbonate, glass fiber, carbon fiber, and other inorganic fillers, plasticizers, stabilizers, colorants, and charging agents. An inhibitor, a flame retardant, a foaming agent, etc. are mentioned.

As the foaming agent, any of physical foaming agents, chemical foaming agents and mixtures thereof may be used. As physical foaming agents, inorganic physical foaming agents such as air, carbon dioxide, nitrogen gas, and water, and organic physical foaming agents such as butane, pentane, hexane, dichloromethane, dichloroethane, and their supercritical fluids are used. be able to. As the supercritical fluid, carbon dioxide, nitrogen or the like is preferably used. If nitrogen is used, the critical temperature is 149.1 ° C. and the critical pressure is 3.4 MPa or more. If carbon dioxide is used, the critical temperature is 31 ° C. and the critical pressure is 7 It is obtained by setting it to 4 MPa or more.

The amount of the foaming agent added is a desired void volume due to innumerable bubbles formed inside the core material 46 by foaming, while the foaming ratio is too high, so that the adhesive surface of the core material 46 to the skin material sheet 44 is obtained. It is determined so that the rigidity against compressive load in the direction perpendicular to the direction does not decrease more than necessary, or the foaming ratio is too high, so that the number of closed cells of countless bubbles decreases and the heat insulation performance does not decrease. . More specifically, from the viewpoint of reducing the weight of the sandwich panel as a whole, the total void volume required for the core material 46 is determined, and this is defined by countless bubbles inside the core material 46 and the core material 46 described later. The expansion ratio, that is, the addition amount of the foaming agent, may be determined based on the void volume allocated to the innumerable bubbles by allocating to the voids formed by the plurality of depressions 50 formed on the surface of the film.

As shown in FIG. 6, the core material 46 is formed by clamping a parison of a thermoplastic resin material in a molten state positioned between two divided molds 48 described later, and clamping the two divided molds 48. And a plurality of indentations 50 having a predetermined taper angle α (see FIG. 8) tapered inwardly on the surface pressed toward the cavity 70 of the divided mold 48. . The taper angle α is tapered toward the opposing mold in order to remove the protrusion 71 for forming the recess 50 from the core material 46 formed after the core material 46 is molded by the split mold 48. The angle is preferably at least 75 ° or more.

More specifically, the core material 46 is formed by clamping two molten molds 48 by clamping two molten sheet-like parisons positioned between the two divided molds 48. The material 46 is composed of a thermoplastic resin plate material 52 molded based on a melted sheet-like parison, and each of the pair of plate materials 52 is tapered toward the inside so as to protrude on the inner surface side. Of the recesses 50 on the outer surface 54, each of the plurality of recesses 50 has an abutting flat surface portion 56 at the foremost detail, and the flat portions 56 of the corresponding recesses 50 of the pair of plate members 52 face each other. The core material 46 is formed by butt welding in a form.

As shown in FIGS. 7 and 8, each of the plurality of recesses 50 has a truncated pyramid shape in which the opening 58 in the surface of the core member 46 is a regular hexagon. The plurality of depressions 50 are arranged in a honeycomb shape on the surface of the core material 46. With such a honeycomb arrangement, it is possible to densely arrange the plurality of depressions 50 on the surface of the core material 46, but the number of the plurality of depressions 50 or the surface of the core material 46 formed by the depressions 50. The size of the upper opening 58 may be appropriately determined from the balance between the weight required for the temporary toilet unit 10 and the required rigidity, in particular, the bending rigidity with respect to the lateral load of the temporary toilet unit 10.

More specifically, the size of the opening 58 of each of the plurality of dents 50, the depth of the dent 50, and the interval between the adjacent dents 50, the size of the opening 58 is large, the depth of the dent 50 is deep, and adjacent to each other. As the interval between the recesses 50 is smaller, the porosity of the core material 46 as a whole can be improved, which contributes to weight reduction, but needs to be determined from the viewpoint of rigidity required for the entire first side panel 18. is there.
As a modification, the plurality of depressions 50 are preferably distributed evenly on the outer surface 54 of the core material 46, but the shapes thereof are a cone shape, a truncated cone shape, a cylindrical shape, a prismatic shape, a pyramid shape, and a hemispherical shape. What is necessary is just to select suitably from various shapes.

On the other hand, the skin material sheet 44 is preferably made of a resin material having a high melt tension from the viewpoint of preventing the occurrence of thickness variation due to drawdown, neck-in, etc., while the transferability to the mold 48, In order to improve the followability, it is preferable to use a resin material having high fluidity. More specifically, the skin material sheet 44 is a sheet formed of polypropylene, engineering plastics, olefin resin, or the like. From the viewpoint of ensuring the rigidity of the first side panel 18 as a whole, particularly the bending rigidity, by ensuring the space between the skin material sheets 44 provided on both sides of the core material 46, that is, the bulk (thickness) of the core material 46. The rigidity of the skin material sheet 44 is required to be at least higher than the rigidity of the core material 46. The skin material sheet 44 constitutes an upper surface wall and a lower surface wall of the first side panel 18, and preferably forms a side wall by welding and integrating the ends of the skin material sheet 44 A and the skin material sheet 44 B on the outer periphery of the first side panel 18. To do. A gap 53 is formed between the outer peripheral side wall of the first side panel 18 and the outer periphery of the core member 46, whereby the first side panel 18 is caused by the difference in thermal shrinkage between the skin material sheet 44 and the core member 46 after molding. Can be prevented from being deformed. The pair of skin materials 44A and 44B may be made of different materials and / or different colors.
The ceiling panel 24 is a single wall structure having a thickness that allows daylighting into the temporary toilet unit 10.

As shown in FIG. 4 (only the fitting relationship between the first side panel 18 and the second side panel 20 and the floor panel 14 is shown), the door panel 16, the first side panel 18, the second side panel 20, and the back panel 22, respectively. The lower ends of the two are connected and fixed by being fitted into a recess 61 provided on the upper surface of the floor panel 14. Further, as shown in FIG. 3, a concave groove 63 is formed near one side edge of each of the first side panel 18 and the second side panel 20, and the back panel 22 is fitted to the concave groove 63. The door panel 16 is attached to the other side edge of the second side panel 20 via a screw 65 so as to be freely opened and closed. Each of the first side panel 18 and the second side panel 20 is formed with a step portion 66 for regulating the position of the door panel 16. As described above, when the panels are conventionally connected to each other by fixing means such as bolts, the stabilization of the connection can be achieved simply by connecting and fixing the panels in a fitting relationship by reducing the weight of each panel. Is possible.
The effect | action is demonstrated about the temporary toilet unit 10 which has the above structure.

The temporary toilet unit 10 transports five panels (the door panel 16, the first side panel 18, the second side panel 20, the back panel 22, and the ceiling panel 24) that have been molded in advance to the site, and assembles them on the site. Although it is possible to dismantle at the site after the lapse of time, a method for forming each panel will be described below by taking the first side panel 18 as an example.

First, for example, a polyolefin resin is supplied to an extruder (not shown), kneaded while being heated and melted, a predetermined amount of foaming agent is added, and further kneaded in the extruder to obtain a foamable molten resin. The accumulator (not shown) is filled with the molten resin while maintaining the resin temperature suitable for foaming and the pressure at which the foamable molten resin does not start foaming. Next, with the gate at the die tip of the extrusion head open, pressing the ram (not shown) of the accumulator opens the foamable molten resin to the low pressure region, forming the foamable cylindrical parison P. The Note that the foaming ratio is kept substantially constant during the molding process by the split mold 48 in the subsequent process.
Next, as shown in FIG. 9, the molten cylindrical parison P is extruded vertically downward through a slit die from a known extrusion head 77, and the continuous molten cylindrical parison P is in two open molds in the open position. Supply during 48.
Next, as shown in FIG. 10, the two divided dies 48 are moved from the open position to the closed position, and the two divided dies 48 are clamped. Thereby, a sealed space is configured.
Next, by performing blow molding or vacuum forming through this sealed space, the parison P in the sealed space is pressed toward the cavity 70 and shaped along the cavity 70.

More specifically, in the case of blow molding, the parison P is directed toward the cavity 70 by inserting a blow pin (not shown) into the core member 46 and introducing a pressurized fluid into the core material 46 in the same manner as conventionally known methods. In the case of pressing and vacuum forming, a parison (not shown) communicating with the sealed space is provided in the divided mold 48 and the sealed space is sucked through this channel, as in a conventionally known method. P is sucked toward the cavity 70, and the parison P is pressed toward the cavity 70.

Thereby, the thermoplastic resin plate material 52 is constituted by the continuous cylindrical parison P in the molten state, and a plurality of the cavities 70 are formed on the surfaces of the pair of thermoplastic resin plate materials 52 facing the corresponding cavities 70. The protrusions 71 are inserted, and a plurality of depressions 50 corresponding to the plurality of protrusions 71 are formed on the opposing surface. Each of the plurality of dents 50 is formed so as to protrude on the surface opposite to the opposing surface, that is, on the inner surface side, thereby forming a butt plane portion 56 that forms the bottom.

At that time, in the two divided molds 48, the arrangement form of the plurality of protrusions 71 in the cavity 70 is made common, so that the corresponding flat surface portions 56 of the corresponding recesses in each of the pair of thermoplastic resin plate materials 52 Are welded and the pinch-off portions 73 of the respective molds 48 come into contact with each other, whereby the continuous cylindrical parison P is welded at the same time as the parting line PL is formed on the peripheral edge thereof.
Next, as shown in FIG. 11, the two split molds 48 are moved from the closed position to the open position by a mold driving device (not shown), and the two split molds 48 are opened. As a result, the molded core material 46 is taken out from between the two split molds 48.
Thus, the molding of the foamable core material 46 is completed.

The method of molding the first side panel 14 having the sandwich panel structure using the core material 46 is performed by positioning the molded core material 46 between a pair of separately prepared molds, A pair of split forms of a sheet-like parison made of a thermoplastic resin material in a melted state with two cores sandwiched between cores 46 in a form protruding around an annular pinch-off portion formed at the peripheral edge of each mold cavity A pair of split molds are clamped to form a sealed space in the pair of split molds, and the mold is clamped by pressurizing from within the sealed space. By sucking the inside of the sealed space through a pair of split molds, a sheet in the sealed space is provided by the concave and convex portions provided inside the annular pinch-off portion in each cavity of the pair of split molds. Forming the parison and welding the sheet-like parison and the core material 46, thereby forming a parting line at the periphery of the sheet-like parison welded to each other with the core material 46 disposed therein. It may be performed by.
Each panel is also individually molded by the above-described molding method, and each completed panel is transported to the site and assembled on the spot to complete the temporary toilet unit 10.

According to the temporary toilet unit 10 having the above configuration, at least one of the door panel 16, the first and second side panels 20, and the back panel 22 has a sandwich panel structure, thereby ensuring strength while achieving weight reduction. Since it is possible, it is possible to simplify maintenance or curing while improving transportability, assemblability and use convenience.

More specifically, at least one of the door panel 16, the first side panel 18, the second side panel 20, and the back panel 22 is a pair of resins in which the respective peripheral edges 40 are welded to form a hollow portion 42 therein. And a resinous core material 46 disposed between the pair of skin material sheets 44 and disposed in the hollow portion 42 and welded to each of the pair of skin material sheets 44. Thus, by securing the bending rigidity through increasing the section modulus by increasing the bulk (thickness) of the core material 46, there is no need to provide a recess on the surface of the panel to compensate for the lack of rigidity, thereby cleaning the recess. Maintenance and curing can be simplified by eliminating the need for troublesome work. By reducing the load burden on the stool 12, it is possible to reduce the weight of the stool 12 itself or simplify the assembly of the panel to the stool 12 and improve the transportability and assemblability through the weight reduction of the temporary toilet unit 10 as a whole. On the other hand, by securing heat insulation or sound insulation by the resin core material 46 itself provided inside the pair of skin materials, for example, an opening such as a ventilation opening is provided in the panel so that the pair of skin materials is hollow. Even if the part 42 is not kept in a sealed state, it is possible to improve the convenience of use.

The embodiments of the present invention have been described in detail above, but various modifications or changes can be made by those skilled in the art without departing from the scope of the present invention. For example, in the present embodiment, all the panels (door panel 16, side panel, and back panel 22) that are attached to the toilet tub 12 have been described as adopting a sandwich panel structure. Accordingly, a sandwich panel structure may be adopted only for some of the panels, for example, side panels.

It is the whole perspective view of the state where door panel 16 of temporary toilet unit 10 concerning the embodiment of the present invention was closed. It is the whole perspective view in the state where the door panel 16 of temporary toilet unit 10 concerning the embodiment of the present invention was opened. It is a longitudinal cross-sectional view of the temporary toilet unit 10 which concerns on embodiment of this invention. It is a cross-sectional view of the temporary toilet unit 10 according to the embodiment of the present invention. It is a partially broken view of the first side panel 18 of the temporary toilet unit 10 according to the embodiment of the present invention. It is a fragmentary sectional view of core material 46 of the 1st side panel 18 of temporary toilet unit 10 concerning an embodiment of the present invention. It is a fragmentary top view of the core material 46 of the 1st side panel 18 of the temporary toilet unit 10 which concerns on embodiment of this invention. It is sectional drawing which follows the line AA of FIG. It is a figure which shows the state before the mold clamping in the formation process of the core material 46 of the 1st side panel 18 of the temporary toilet unit 10 which concerns on embodiment of this invention. It is a figure which shows the clamping state in the formation process of the core material 46 of the 1st side panel 18 of the temporary toilet unit 10 which concerns on embodiment of this invention. It is a figure which shows the mold open state in the formation process of the core material 46 of the 1st side panel 18 of the temporary toilet unit 10 which concerns on embodiment of this invention.

10 Temporary Toilet Unit 12 Toilet 14 Floor Panel 16 Door Panel 18 First Side Panel 20 Second Side Panel 22 Back Panel 24 Ceiling Panel 25 Sealed Space 26 Toilet 28 Step 32 Side Edge 36 Side Edge 42 Hollow Part 44 Skin Material Sheet 46 Core Material 48 Mold 50 Dimple 53 Gap 54 Outer surface 56 Butt plane part 61 Recess 63 Recess groove 66 Step part 67 Rib 69 Handle 70 Cavity 71 Projection body 73 Pinch off part

Claims (3)

The first side panel is connected to one side edge of the door panel, the second side panel is connected to the other side edge of the door panel, the back panel is connected to the side edges of the first side panel and the second side panel, the door panel, the first and second side panels and said back panel, a temporary toilet unit constituting the panel-type assembly structure constituting a closed space in which a toilet inside the flight chamber is a hollow portion therein The bottom panel of the door panel, the first and second side panels, and the back panel is connected and fixed to the top surface of the floor panel, and the first and first panels are made of resin. At least one of the two side panels and the back panel has a sandwich panel structure, A pair skin material sheet, and a resin core material is welded to the respective said pair of skin material sheet, constitutes a side wall in a state in which the pair of ends of the skin material sheet is integrally welded, the A temporary toilet unit characterized in that a gap is formed between the side wall of the outer periphery of the sandwich panel and the outer periphery of the core member. The temporary toilet unit according to claim 1, wherein the core material has a foamed resin structure having a predetermined thickness and / or a predetermined expansion ratio. The temporary toilet unit according to claim 1, wherein the sandwich panel has a flat structure having no concave rib on the surface of the panel.

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