Joint structure for concrete members

Abstract

To provide a joint structure for concrete members that enables easy and quick jointing of the concrete members and easy disjoining of the concrete members.SOLUTION: A male joint 30 comprises a joint member 32 that is inserted into a female joint 40, and the female joint 40 comprises an engagement member 43 that restricts movement of the joint member 32 in the anti-insertion direction by engaging the joint member 32 inserted into the female joint 40, so that the joint can be completed simply by inserting the joint member 32 of the male joint 30 into the female joint 40. On the other hand, when disjoining concrete members 11, 12, 21, 22, by removing a nut 32e from a male thread 32d of joint member 32, coupling between the male joint 30 and the female joint 40 is released, so that one joint end face and the other joint end face can be separated while joint member 32 remains in the female joint 40, which allows disassembling of a building body 1 is performed by only removing the nut 32e.SELECTED DRAWING: Figure 14

Description

[Technical field]

[0001] The present invention relates to a joint structure of concrete members used mainly in concrete buildings such as temporary housing, multi-purpose shelters, bungalows, warehouses, commercial facilities, temporary dwellings, schools, hospitals, and office buildings. [Background technology]

[0002] Conventionally, when an emergency occurs due to a natural disaster (earthquake, tsunami, flood, typhoon, etc.), measures are taken to provide temporary housing as a shelter for disaster victims. However, temporary housing has a simple structure compared to ordinary housing such as detached houses and condominiums, and therefore has the disadvantage of being inferior in durability, fire resistance, sound insulation, and heat insulation. For this reason, temporary housing is not necessarily comfortable for residents, and it often causes inconvenience to the daily lives of disaster victims who live there for a long period of time.

[0003] Therefore, constructing temporary housing using concrete construction would improve durability, fire resistance, and soundproofing; however, concrete construction requires extensive construction work such as foundation work, formwork work, and concrete pouring, and construction costs are high, making it unrealistic to use it as temporary housing.

[0004] In addition, it has been proposed to construct a small dwelling more easily and cheaply than with general concrete building methods by dividing the main body of the building into several concrete components, and manufacturing each concrete component in a factory or the like, and then transporting them to the installation location and assembling them on-site (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-239943 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as mentioned above, in the case of assembling the main body of a building on site using concrete members produced in a factory or the like, the individual concrete members are joined with bolts and nuts. However, since the joint end faces of the individual concrete members have numerous joint points, if these joint points are joined with bolts and nuts, the tightening work of the bolts and nuts becomes complicated, and there is a problem that the assembly work of the main body of the building cannot be carried out efficiently. In addition, when the main building body is no longer needed or when it is to be relocated to another location, there is a problem in that the demolition work becomes complicated when the bonds between the concrete components need to be released to dismantle the main building body.

[0007] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a joint structure for concrete members that enables easy and quick joining of concrete members and also enables easy release of the joining of concrete members. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a joint structure for concrete members comprising a male joint arranged on one of the joint end faces of the concrete members to be joined to each other, and a female joint arranged on the other of the joint end faces of the concrete members and to which the male joint is connected, wherein the male joint has a joint member inserted into the female joint, and the female joint has an engaging member that engages with the joint member inserted into the female joint to restrict movement of the joint member in the anti-insertion direction, and the male joint is configured to be separable while leaving the joint member within the female joint in a joined state in which the joint member is inserted into the female joint.

[0009] As a result, since joining is completed simply by inserting the coupling member of the male joint into the female joint, manual tightening of bolts and nuts is not required when joining the male joint and the female joint. Also, by separating the coupling member of the male joint from the male joint in a joined state in which the coupling member is inserted into the female joint, the male joint and the female joint are released from their joined state, and one joint end surface is separated from the other joint end surface while the coupling member remains in the female joint. Effect of the Invention

[0010] According to the present invention, since no manual tightening of bolts and nuts is required when connecting the male joint and the female joint, the joining work of concrete members can be performed easily and quickly. Furthermore, when releasing the joining of concrete members, one joining end surface and the other joining end surface can be separated while leaving the joint member of the male joint inside the female joint, so that the joining of concrete members can be released extremely easily. As a result, when demolishing a building or the like made of joined concrete members, the demolition work can be performed efficiently. [Brief description of the drawings]

[0011] [Figure 1] A perspective view of a prefabricated concrete building using a joint structure according to a first embodiment of the present invention. [Diagram 2] Exploded perspective view of the main unit [Diagram 3] FIG. 3 is an exploded perspective view of one end unit; [Figure 4] FIG. 3 is an exploded perspective view of the other end unit. [Diagram 5] Exploded front view of the main unit [Figure 6] Front view of the main unit [Figure 7] Exploded side view of the main unit [Figure 8] Side view of the main unit [Figure 9] Side view of end unit [Figure 10] Exploded side view of end unit [Figure 11]Side cross-sectional view of male and female fittings [Figure 12] FIG. 1 is a cross-sectional plan view showing a process of connecting a male joint and a female joint; [Figure 13] A plan sectional view showing the connected state of the male joint and the female joint [Figure 14] FIG. 1 is a plan sectional view showing a process of disconnecting a male joint and a female joint; [Figure 15] FIG. 1 is a plan sectional view showing a process of disconnecting a male joint and a female joint; [Figure 16] FIG. 11 is a plan view showing a state in which the first main body side concrete member is being transported; [Figure 17] FIG. 11 is a plan view showing a state in which the second main body concrete member is being transported; [Figure 18] Front view showing the assembly process of the building body [Figure 19] Front view showing the assembly process of the building body [Figure 20] Plan view showing the assembly process of the building body [Figure 21] Plan view showing the assembly process of the building body [Figure 22] Side view showing the assembly process of the building body [Figure 23] Side view showing the assembly process of the building body [Figure 24] Side view showing the assembly process of the building body [Diagram 25] Side view showing the assembly process of the building body [Figure 26] Side view showing the assembly process of the building body [Figure 27] Side view showing the assembly process of the building body [Figure 28] FIG. 11 is a plan sectional view showing a joining process of a male joint and a female joint according to a second embodiment of the present invention; [Figure 29] A plan sectional view showing the connected state of the male joint and the female joint [Diagram 30] FIG. 1 is a plan sectional view showing a process of disconnecting a male joint and a female joint; [Diagram 31] FIG. 1 is a plan sectional view showing a process of disconnecting a male joint and a female joint; [Diagram 32] FIG. 1 is a cross-sectional plan view showing a process of reconnecting a male joint and a female joint; [Diagram 33] FIG. 1 is a cross-sectional plan view showing the male and female joints reconnected. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] 1 to 27 show a first embodiment of the present invention, which shows a joint structure of concrete members used in a prefabricated concrete building used as, for example, temporary housing.

[0013] The prefabricated concrete building of this embodiment is formed using at least one main body unit 10 arranged in the middle of the fore-and-aft direction of the building main body 1, and end units 20 arranged at one or both ends of the building main body 1 in the fore-and-aft direction.

[0014] The main body unit 10 has a top surface 10a, a bottom surface 10b, an upper side surface 10c, and a lower side surface 10d, and both front and rear end surfaces are open. The main body unit 10 is composed of a first main body side concrete member 11 in which the top surface 10a and the upper side surface portions 10c on both sides in the width direction are integrally formed, and a second main body side concrete member 12 in which the bottom surface 10b and the lower side surface portions 10d on both sides in the width direction are integrally formed, and the first and second main body side concrete members 11, 12 are each formed of precast concrete. The first and second main body side concrete members 11, 12 are formed so that the upper and lower side surface portions 10c, 10d are divided at approximately the center position in the vertical direction of the main body unit 10, and are joined by butting the vertical end surfaces of the upper and lower side surface portions 10c, 10d against each other.

[0015] The first main body concrete member 11 has an upper surface 10a formed in an arch shape that is convex upward, and straight-wall-shaped upper side surfaces 10c are formed on both sides of the upper surface 10a so as to extend downward. Furthermore, flat surfaces 11a are provided on both ends of the upper surface of the first main body concrete member 11 in the width direction, extending in the front-rear direction along the upper ends of the upper side surfaces 10c.

[0016] The second main body side concrete member 12 has a flat bottom surface 10b, and straight wall-like lower side surface portions 10d extending upward on both widthwise sides of the bottom surface 10b. Also, a stand 13 extending in the front-rear direction is attached to both widthwise ends of the underside of the second end side concrete member 11.

[0017] The end unit 20 has an upper surface portion 20a, a bottom surface portion 20b, an upper side surface portion 20c, a lower side surface portion 20d, an upper end surface portion 20e, and a lower end surface portion 20f, and is open at one end surface in the front-rear direction. The end unit 20 is composed of a first end side concrete member 21 in which the upper surface portion 20a, the upper side surface portions 20c on both sides in the width direction, and the upper end surface portion 20e are integrally formed, and a second end side concrete member 22 in which the bottom surface portion 20b, the lower side surface portions 20d on both sides in the width direction, and the lower end surface portion 20f are integrally formed, and the first and second end side concrete members 21 and 22 are each formed of precast concrete. The first and second end side concrete members 21, 22 are formed so that the upper and lower side surface portions 20c, 20d and the upper and lower end surface portions 20e, 20f are divided at approximately the vertical center position of the end unit 20, and are joined by butting together the vertical end faces of the upper and lower side surface portions 20c, 20d and the upper and lower end surface portions 20e, 20f.

[0018] The first end-side concrete member 21 has an upper surface 20a formed in an arch shape that is convex upward, and straight-wall-shaped upper side surface portions 20c and upper end surface portions 20e are formed on both widthwise sides and end sides of the upper surface 20a so as to extend downward. In addition, flat portions 21a extending in the front-rear direction along the upper end of the upper side surface portions 20c are provided on both widthwise ends of the upper surface of the first end-side concrete member 21.

[0019] The second end side concrete member 22 has a flat bottom surface 20b, and straight wall-like lower side surface portions 20d and lower end surface portions 20f are formed on both widthwise sides and end sides of the bottom surface 20b so as to extend upward. In addition, stands 23 extending in the front-rear direction are attached to both widthwise ends of the lower surface of the second end side concrete member 21.

[0020] The first and second main body side concrete members 11, 12 and the first and second end side concrete members 21, 22 are joined by connecting a male joint 30 arranged on one joint end face with a female joint 40 arranged on the other joint end face. Figures 12 to 15 below show the male joint 30 and female joint 40 provided on the joint end face of the first main body side concrete member 11.

[0021] The male joint 30 consists of a joint plate 31 embedded in one of the joint end faces, a rod-shaped joint member 32 protruding from the outer surface side of the joint plate 31, a pair of anchor plates 33 provided on the back side of the joint plate 31, and anchor members 34 joined to each anchor plate 33, and all parts of the joint plate 31 except for its front surface (outer surface side) are embedded in the first main body side concrete member 11.

[0022] The joint plate 31 is provided so that its front surface is flush with the joint end surface of the first main body side concrete member 11, and has an insertion hole 31a in its center through which the base end side of the joint member 32 is inserted.

[0023] The joint member 32 has a first large diameter portion 32a formed at the tip side in the longitudinal direction, a second large diameter portion 32b formed at the center side in the longitudinal direction, a small diameter portion 32c formed between the first large diameter portion 32a and the second large diameter portion 32c, and a male thread portion 32d formed at the tip side in the longitudinal direction, and the first and second large diameter portions 32a, 32b are each formed in a tapered shape so that the diameter gradually decreases toward the tip side. The male thread portion 32d of the joint member 32 is inserted into the insertion hole 31a of the joint plate 31, and the joint member 32 is fastened to the joint plate 31 by a nut 32e screwed onto the male thread portion 32d.

[0024] Each anchor plate 33 is made of plate-shaped steel material arranged at intervals in the vertical direction on the back side of the joint plate 31, and is joined to the back side of the joint plate 31 by welding or the like so that it is perpendicular to the back side of the joint plate 31.

[0025] Each anchor member 34 is made of a reinforcing bar such as a deformed steel bar extending in a direction perpendicular to the back surface of the joint plate 31, and one end side of the reinforcing bar is joined to the anchor plate 33 by welding or the like.

[0026] In addition, a bolt box 35 is provided on the back side of the joint plate 31 for attaching and detaching the nut 32e to the joint member 32. The bolt box 35 is a rectangular recessed space with one side open to the outer surface of the first main body side concrete member 11, and is formed by punching out concrete. Note that the bolt box 35 may be formed from a box-shaped steel material embedded in concrete, for example, when it is close to the anchor member 34, when there is a concern about water intrusion, or when it is not possible to secure space for the concrete punching.

[0027] The female side joint 40 consists of a joint plate 41 arranged on the other joint end surface, a housing 42 that receives the joint member 31 of the male side joint 30, an engaging member 43 that engages with the joint member 31 of the male side joint 30, a pair of anchor plates 44 provided on the back side of the joint plate 41, and anchor members 45 joined to each anchor plate 44, and the part of the joint plate 41 except for its front surface (outer surface side) is embedded in the first main body side concrete member 11.

[0028] The joint plate 41 is provided so that its front surface is flush with the joining end surface, and is provided at its center with an insertion hole 41a through which the joint member 31 is inserted.

[0029] The housing 42 is formed so that one end side covers a part of the back surface of the joint plate 41 including the insertion hole 41a, and the other end side has a smaller diameter than the one end side and is formed so as to extend in the insertion direction of the joint member 32.

[0030] The engaging member 43 is made of a ring-shaped member that can expand and contract in the radial direction, and is biased in the diameter contracting direction by a spring material, etc. In the contracted diameter state, the engaging member 43 has an opening smaller than the first large diameter portion 31a of the coupling member 31, and the opening expands in the radial direction by press-fitting the first large diameter portion 31a, allowing the first large diameter portion 31a to be inserted therethrough.

[0031] Each anchor plate 44 is made of plate-shaped steel material arranged at intervals in the vertical direction on the back side of the joint plate 41, and is joined to the back side of the joint plate 41 by welding or the like so that it is perpendicular to the back side of the joint plate 41.

[0032] Each anchor member 45 is made of a reinforcing bar such as a deformed steel bar extending in a direction perpendicular to the back surface of the joint plate 41, and one end side of the reinforcing bar is joined to the anchor plate 44 by welding or the like.

[0033] In the male joint 30 and female joint 40 configured as described above, when the joint member 31 of the male joint 30 is inserted into the female joint 40 as shown in Fig. 12, the first large diameter portion 31a of the joint member 31 is pressed into the opening of the engaging member 43 as shown in Fig. 13. At that time, the first large diameter portion 31a overcomes the engaging member 43 while pushing and widening the engaging member 43 with the tapered portion on the tip side, and the engaging member 43 engages with the small diameter portion 31c of the joint member 31. As a result, the movement of the joint member 31 in the counter-insertion direction is restricted by the engagement between the first large diameter portion 31a and the engaging member 43, and the male joint 30 and the female joint 40 are joined to each other.

[0034] When assembling the building main body 1 having the above-mentioned structure, an assembling device 50 shown in Figures 20 and 21 is used. Note that these figures show the case where two main body units 10 are joined together.

[0035] The assembly device 50 is composed of a first pressing member 51 arranged at one front-to-rear end of each main unit 10 to be joined, a second pressing member 52 arranged at the other front-to-rear end of each main unit 10, a pair of widthwise connecting members 53 connecting the first and second pressing members 51, 52, a pair of hydraulic cylinders 54 as pressing devices that move the first and second pressing members 51, 52 in directions approaching each other via each connecting member 53, and a pair of load cells 55 that detect the load of each hydraulic cylinder 54.

[0036] The first and second pressing members 51, 52 are made of a steel material extending in the width direction of each main body unit 10, and are formed to be longer than the width dimension of each main body unit 10.

[0037] Each connecting member 53 is made of a rod-shaped steel material arranged on both longitudinal ends of the first and second pressing members 51, 52, with one end slidably penetrating the first pressing member 51 and the other end connected to the second pressing member 51. In this case, the connecting position between each connecting member 53 and the second pressing member 51 can be moved to any position in the longitudinal direction of the connecting member 53.

[0038] Each hydraulic cylinder 54 is fixed coaxially with the connecting member 53 to the back surface of the first pressing member 51 (the surface opposite to the second pressing member 52), and the connecting member 53 is arranged so as to pass through the hydraulic cylinder 54 and the drive rod 54a of the hydraulic cylinder 54.

[0039] One end of each load cell 55 is fixed to a drive rod 54a of a hydraulic cylinder 54, and the other end of the connection member 53 that passes through the load cell 55 is fixed to the other end.

[0040] In the assembly device 50 configured as described above, the first pressing member 51 is moved toward the second pressing member 52 by each hydraulic cylinder 54, so that the main body units 10 are joined by moving in a direction approaching each other while being pressed by the first and second pressing members 51, 52, as shown in Fig. 21. At that time, the load of the hydraulic cylinder 54 is detected by each load cell 55, so that the contact between the main body units 10 can be detected by each load cell 55, and the pressing force on each main body unit 10 can be managed so as not to be excessive.

[0041] In this embodiment, the hydraulic cylinder 54 is used as the pressing device, but the pressing device may be configured with a driving device other than a hydraulic cylinder. For example, the first pressing member 51 and the second pressing member 52 may be connected by a well-known chain block, and the first and second pressing members 51, 52 may be pulled toward each other by the chain block, so that the first and second pressing members 51, 52 press each main unit 10.

[0042] In addition, in this embodiment, the load of the hydraulic cylinder 54 is detected by the load cell 55. However, the load cell 55 may not be provided and the contact between the main body units 10 may be visually confirmed.

[0043] 18 to 27, the assembly process of the building main body 1 will be described. Here, the assembly process of the building main body 1 will be described using two main body units 10 and two end units 20 arranged at both ends of the main body units 10 in the front-rear direction.

[0044] First, the first and second main body side concrete members 11, 12 and the first and second end side concrete members 21, 22, which have been fabricated in advance in a factory or the like, are transported to the installation site by a transport vehicle S such as a truck. At that time, the first and second main body side concrete members 11, 12 and the first and second end side concrete members 21, 22 are formed to a dimension such that the height H from the road surface when loaded on the transport vehicle S does not exceed the height limit (e.g., 3.8 m) set forth in the Road Act, as shown in Figs. 16 and 17. Note that Fig. 16 shows an example in which the first main body side concrete member 11 is loaded, and Fig. 17 shows an example in which the second main body side concrete member 12 is loaded. Note that the joint member 31 of the male joint 30 is attached on-site.

[0045] Next, as shown in Fig. 18, the first main body concrete member 11 suspended by a wire W is lowered from above onto the second main body concrete member 12 by a crane or the like (not shown), and the joint end faces of the first and second main body concrete members 11, 12 are butted together as shown in Fig. 19. At this time, the joint member 31 of the male joint 30 provided on one joint end face of the first and second main body concrete members 11, 12 is pressed into the female joint 40 provided on the other joint end face, and the male joint 30 and the female joint 40 are joined together to join the joint end faces of the first and second main body concrete members 11, 12. In this way, the main body unit 10 is assembled.

[0046] Next, after assembling the two main body units 10 as described above, the main body units 10 are arranged at a distance from each other in the front-rear direction as shown in Figures 20 and 22, and the first and second pressing members 51, 52 of the assembly device 50 are arranged on both sides of each main body unit 10 in the front-rear direction, and the main body units 10 are moved while being pressed in a direction approaching each other by the first and second pressing members 51, 52 as shown in Figures 21 and 23, so that the joint end faces of each main body unit 10 are butted against each other. At this time, the joint member 31 of the male joint 30 provided on one joint end face of each main body unit 10 is pressed into the female joint 40 provided on the other joint end face, and the male joint 30 and the female joint 40 are joined to join the joint end faces of each main body unit 10. In this case, the joint member 31 of the male joint 30, which is disposed on the end face with which the first pressing member 51 comes into contact, is attached after pressing so as not to interfere with the first pressing member 51 during pressing.

[0047] Next, after assembling one end unit 20 by joining the first and second end side concrete members 21, 22 in the vertical direction in the same manner as the main unit 10, the one end unit 20 is disposed at a distance from one end side of the one main unit 10 as shown in FIG. 24, and the first and second pressing members 51, 52 of the assembling device 50 are disposed at one end side of the end unit 20 in the front-rear direction and the other end side of the other main unit 10 in the front-rear direction. At that time, the connecting positions of each connecting member 53 and the second pressing member 51 are adjusted according to the positions of the end unit 20 and each main unit 10. Next, as shown in FIG. 25, the one end unit 20 is moved while being pressed in a direction approaching the one main unit 10 by the first and second pressing members 51, 52, so that the joint end faces of the one end unit 20 and the one main unit 10 are butted against each other. At that time, the joint member 31 of the male joint 30 provided on one of the end units 20 is pressed into the female joint 40 provided on one of the main body units 10, and the male joint 30 and the female joint 40 are joined together to join the joint end faces of the one of the end units 20 and the one of the main body units 10.

[0048] Next, the other end unit 20 is assembled by joining the first and second end side concrete members 21, 22 in the same manner as the one end unit 20, and then the other end unit 20 is arranged at a distance from the other end side of the other main unit 10 as shown in FIG. 26, and the first and second pressing members 51, 52 of the assembly device 50 are arranged at one end side of the one end unit 20 in the front-rear direction and the other end side of the other end unit 20 in the front-rear direction. At that time, the connecting positions of each connecting member 53 and the second pressing member 51 are adjusted according to the positions of the end unit 20 and each main unit 10. Next, as shown in FIG. 27, the other end unit 20 is moved while being pressed in a direction approaching the other main unit 10 by the first and second pressing members 51, 52, so that the joint end faces of the other end unit 20 and the other main unit 10 are butted against each other. At that time, the joint member 31 of the male joint 30 provided on the other main body unit 10 is pressed into the female joint 40 provided on the other end unit 20, and the male joint 30 and the female joint 40 are coupled to join the joint end faces of the other end unit 20 and the other main body unit 10.

[0049] The building body 1 assembled in the above manner is used, for example, as a temporary house. In this case, although not shown, doors and windows are provided in the building body 1, and the doors and windows are assembled when the precast concrete is manufactured.

[0050] According to this embodiment, the building includes a main body unit 10 arranged in the middle of the building main body 1 in the front-to-rear direction, and an end unit 20 arranged at an end of the building main body 1 in the front-to-rear direction. The main body unit 10 is formed by joining together a first main body side concrete member 11 forming the upper side of the main body unit 10 and a second main body side concrete member 12 forming the lower side of the main body unit 10, and the end unit 20 is formed by joining together a first end side concrete member 21 forming the upper side of the end unit 20 and a second end side concrete member 22 forming the lower side of the end unit 20. The building main body 1 is formed by joining the main body unit 10 and the end unit 20 to each other. Therefore, the first and second main body side concrete members 11, 12 and the first and second end side concrete members 21, 22, which have been fabricated in advance in a factory or the like, can be transported to the installation site and the building main body 1 can be assembled on-site, and the building main body 1 of concrete structure can be easily and quickly installed at the installation site. As a result, for example, when the building body 1 is used as temporary housing, a living space with excellent durability, fire resistance, sound insulation, and heat insulation can be provided to the residents, and disruption to daily life can be reduced, particularly for residents who live there for a long period of time.

[0051] Furthermore, since the main body unit 10 and the end unit 20 are composed of the first and second main body side concrete members 11, 12 and the first and second end side concrete members 21, 22, which are divided from each other approximately at the center in the vertical direction of the building main body 1, the height dimension of each of these concrete members can be made sufficiently large as long as it does not exceed the height limit of the cargo when transported to the installation site by a transport vehicle S such as a truck. This allows the building main body 1 assembled on site to have a height dimension approximately twice that of the concrete members that can be transported by vehicle, making it possible to form a building main body 1 with a sufficiently large living space.

[0052] Furthermore, it is provided with a male joint 30 arranged on one of the joining end faces and a female joint 40 arranged on the other of the joining end faces, the male joint 30 having a joint member 32 inserted into the female joint 40, and the female joint 40 having an engagement member 43 that restricts movement of the joint member 32 in the anti-insertion direction by engaging with the joint member 32 inserted into the female joint 40, so that joining can be completed simply by inserting the joint member 32 of the male joint 30 into the female joint 40. This makes it possible to perform joining work extremely easily without requiring manual tightening of bolts and nuts.

[0053] In addition, when the building body 1 is no longer needed, the connections between the concrete members 11, 12, 21, and 22 can be released to dismantle the building body 1, and each concrete member can be transported from the installation site in a transport vehicle S, just as when it was delivered.

[0054] At that time, by removing the nut 32e from the male threaded portion 32d of the coupling member 32 inside the bolt box 35 of the male coupling 30 as shown in FIG. 14, the connection between the male coupling 30 and the female coupling 40 is released, and one joint end surface and the other joint end surface can be separated while leaving the coupling member 32 inside the female coupling 40 as shown in FIG. 15.

[0055] As a result, the building main body 1 can be dismantled simply by removing the nuts 32e, making the dismantling extremely easy. When reusing the concrete members 11, 12, 21, 22, for example when relocating the building main body 1 to another location, the male joint 30 and the female joint 40 can be reused by, for example, radially expanding the engaging member 43 of the female joint 40 using a dedicated tool or the like to remove the joint member 32, and then reattaching the joint member 32 to the male joint 30.

[0056] The building body 1 of the embodiment can be used for a wide variety of purposes, such as toilets, warehouses, machine rooms, power rooms, sauna rooms, dining rooms, etc., in addition to living rooms, and can be combined in any way to configure a facility equipped with the necessary functions. In addition, if solar panels are installed on the top surface of the building body 1, it will be possible to supply electricity by solar power generation.

[0057] 28 to 33 show a second embodiment of the present invention, in which a female joint having a different configuration is used instead of the female joint 40. Note that the same components as those in the first embodiment are denoted by the same reference numerals.

[0058] Similar to the female joint 40 of the first embodiment, the female joint 70 of this embodiment comprises a joint plate 71 arranged on the other joint end face, a housing 72 that receives the joint member 32 of the male joint 30, an engagement member 73 that engages with the joint member 32 of the male joint 30, a pair of anchor plates 74 provided on the back side of the joint plate 71, and anchor members 75 joined to each anchor plate 74, and the portion of the joint plate 71 excluding its front surface (outer surface side) is embedded in the first main body concrete member 11. Note that the configurations of these members, other than the housing 72, are the same as those of the female joint 40 of the second embodiment, and therefore detailed explanations will be omitted.

[0059] The housing 72 has a portion that receives the coupling member 32 that is axially longer than the housing 42 of the first embodiment, and has a length that can receive not only the coupling member 32 that engages with the engaging member 73, but also the coupling member 72 of the other engaging member 73.

[0060] In this embodiment, when the coupling member 32 of the male joint 30 is inserted into the female joint 70 as shown in Fig. 28, the first large diameter portion 32a of the coupling member 32 is pressed into the opening of the engagement member 73 as shown in Fig. 29. At that time, the first large diameter portion 32a overcomes the engagement member 73 while pushing and widening the engagement member 73 with the tapered portion on the tip side, and the engagement member 73 engages with the small diameter portion 32c of the coupling member 32. As a result, the movement of the coupling member 32 in the direction opposite to the insertion direction is restricted by the engagement between the first large diameter portion 32a and the engagement member 73, and the male joint 30 and the female joint 40 are joined to each other. As a result, as in the first embodiment, the joining is completed simply by inserting the male joint 30 into the female joint 70, so that the joining end surfaces can be easily joined.

[0061] Furthermore, when releasing the connections between the concrete members (the first main body side concrete member 11 in Figures 28 to 33) during demolition of the building main body 1, the connection between the male side joint 30 and the female side joint 70 is released by removing the nut 32e from the male threaded portion 32d of the joint member 32 inside the bolt box 33f of the male side joint 30 as shown in Figure 30, and one joint end face can be separated from the other joint end face while leaving the joint member 32 in the female side joint 40 as shown in Figure 31.

[0062] Furthermore, when assembling the building body 1 by reusing each concrete member, a new joint member 32 is attached to the male joint 30 on one joint end surface of the first main body-side concrete member 11, as shown in Fig. 32, and the joint member 62 of the male joint 30 is inserted into the female joint 70. At this time, the existing joint member 32 remains inserted in the female joint 70 as shown in Fig. 32, but when the base end of the existing joint member 32 is pressed with the tip of the new joint member 32, the second large diameter portion 32b of the existing joint member 32 overcomes the engaging member 73 while pushing and widening the engaging member 73 with the tapered portion on the tip side, and the new joint member 32 engages with the engaging member 73 while pushing the existing joint member 32 deep inside the housing 72 as shown in Fig. 33. This allows the male joint 30 to be reconnected to the female joint 70 without removing the existing joint member 32 from the female joint 70, and the building body 1 can be efficiently assembled at the reuse destination.

[0063] It should be noted that each of the above-described embodiments is merely an example of the present invention, and the present invention is not limited to the above-described embodiments. In addition to temporary housing, the present invention can also be applied to the joining of concrete members used in various buildings, such as multi-purpose shelters, bungalows, warehouses, commercial facilities, temporary dwellings, schools, hospitals, and office buildings. [Explanation of symbols]

[0064] 1...building body, 10...main body unit, 11...first main body side concrete member, 12...second main body side concrete member, 20...end unit, 21...first end side concrete member, 22...second main body side concrete member, 30...male side joint, 32...joint member, 32d...male threaded portion, 32e...nut, 35...bolt box, 40...female side joint, 43...engaging member, 50...assembly device, 70...female side joint, 72...housing, 73...engaging member.

Claims

1. A joint structure for concrete members, comprising a male joint arranged on one of the joint end faces of the concrete members to be joined to each other, and a female joint arranged on the other of the joint end faces of the concrete members and to which the male joint is coupled, The male joint has a joint member that is inserted into the female joint, The female joint has an engagement member that engages with the joint member inserted into the female joint to restrict movement of the joint member in a direction opposite to the insertion direction, The male joint is configured to be separable while leaving the joint member in the female joint in a coupled state in which the joint member is inserted into the female joint. A joint structure for concrete members characterized by the above.

2. The male joint is configured so that an existing joint member that has been separated from the male joint and inserted into the female joint is pushed into the back of the female joint by a joint member newly attached to the male joint, while a new joint member is inserted into the female joint and engaged with the engaging member.

2. A joint structure for concrete members according to claim 1.

3. The female joint has a housing that receives a joint member inserted into the female joint, The housing is formed to a length capable of receiving the existing joint member and the new joint member.

3. A joint structure for concrete members according to claim 2.

4. The male joint has a joint plate embedded in one joint end surface, The joint plate has an insertion hole into which a male threaded portion provided on the joint member is inserted, and the joint member is fastened to the joint plate by a nut that is screwed onto the male threaded portion of the joint member that is inserted into the insertion hole, The back side of the joint plate is provided with a concave space that opens to the outer surface of the concrete member and allows the nuts to be attached and detached to the joint member.

4. A joint structure for concrete members according to claim 1, 2 or 3.

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