Floor forming member connection structure

Abstract

To provide a connection structure of floor forming members capable of stabilizing a connection state against swing etc. while maintaining easiness of a connection operation of neighboring floor forming members.SOLUTION: When connecting neighboring floor forming members 1, a protruding portion 12 of a protrusion-like portion 10 is inserted into a recessed portion 7 of a recess-like portion 6 provided in each of the floor forming members 1. On the other hand, when displacement in a direction crossing the insertion direction is relatively generated in the protrusion-like portion 10 and the recess-like portion 6 in a connection state due to earthquake occurrence etc., additional engaging or fitting portions 9 provided in the protrusion-like portion 10 and the recess-like portion 6 are fitted or engaged between the protrusion-like portion 10 and the recess-like portion 6. Concretely, for example, when the relative displacement is generated, a projection 13 provided in the protruding portion 12 of the protrusion-like portion 10 is fitted into a depressed portion 8 provided in the recessed portion 7 of the recess-like portion 6. Even though a force pulling out the protruding portion 12 of the protrusion-like portion 10 from the recessed portion 7 of the recess-like portion 6 is applied, the projection 13 is hooked to an edge of the depressed portion 8, to be engaged.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a connecting structure for floor-forming members, in particular to a connecting structure for floor-forming members that enables the formation of a double floor by connecting adjacent floor-forming members at connecting parts and laying them on a foundation floor surface. [Background technology]

[0002] Double floors that allow for underfloor wiring in offices are becoming widespread. For example, a floor forming member that allows for the formation of such a double floor is described in the following Patent Document 1, which was previously proposed by the present applicant. This floor forming member has support parts that are placed on the base floor surface at equal intervals vertically and horizontally as support legs to mount and support the floor plate that forms the upper surface of the double floor, and multiple support parts are unitized by, for example, connecting adjacent support parts with band-shaped joint parts in a cross shape in a plan view. In this unitized floor forming member, adjacent floor forming members are connected to each other in the approximately horizontal direction with connecting parts.

[0003] This connecting portion is provided, for example, at the tip of the extension direction of the band-shaped joint portion, and one of the adjacent floor forming members is provided with a bowl-shaped convex portion with a convex portion that is convex upward, and the other adjacent floor forming member is provided with a bowl-shaped concave portion with a concave portion that is open downward. The convex portion of this convex portion is sized to gently fit into the concave portion of the concave portion, and since the joint portion is made of a material that is somewhat flexible, for example, the joint portion of the floor forming member on the side where the concave portion is provided is bent upward, and the concave portion of the concave portion is placed over the convex portion of the convex portion of the adjacent floor forming member from above, thereby making it possible to easily connect the floor forming members. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-252249 Summary of the Invention [Problem to be solved by the invention]

[0005] However, while the connecting structure of the floor forming members described in the above Patent Document 1 is easy to install, it is a structure in which the convex part of the convex part of the floor forming member is simply covered with the concave part of the concave part of the adjacent floor forming member from above to connect them, so there is a risk that the connection between the concave part of the concave part and the convex part of the convex part of the adjacent floor forming members will come off when shaking occurs, for example, during an earthquake. When the adjacent floor forming members come off in this way, the horizontal movement of each floor forming member, specifically the support part, is no longer restricted, and in some cases, the distance between the support parts becomes large, and there is a risk that the floor plate mounted on it will fall off.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a connecting structure for floor forming members that can stabilize the connected state against shaking, etc. while maintaining ease of connecting operation between adjacent floor forming members. [Means for solving the problem]

[0007] In order to achieve the above object, the connecting structure of the floor forming member of the present invention is A floor forming member connection structure that includes a plurality of floor forming members each having a support portion that supports a floor plate from below, and that allows the formation of a double floor by connecting adjacent floor forming members to each other at their connecting portions and laying the floor plate on the foundation floor surface and bridging the floor plate between the supporting portions, The connecting portion has a first connecting portion provided on one of the adjacent floor forming members and a second connecting portion provided on the other, the second connecting portion being basically connected to the first connecting portion only by the relative movement of the adjacent floor forming members; The first connecting portion and the second connecting portion have a configuration that allows additional movement within a predetermined range in a direction intersecting the direction of the moving movement of the adjacent floor forming members in the basic connection state, The first connecting portion and the second connecting portion are characterized in that, when the additional movement occurs, an additional engagement or locking portion is provided which generates, in addition to the basic connected state, a resistance force against release of the connected state between the first connecting portion and the second connecting portion.

[0008] According to this configuration, the basic connection of the connecting parts of adjacent floor forming members can be achieved only by a relative movement motion, that is, they can be easily connected by a movement motion from one to the other without using any connecting member. On the other hand, when an additional movement occurs in a direction intersecting the above-mentioned movement motion direction due to shaking such as during an earthquake, the additional engagement or locking part generates an additional resistance force, that is, a resistance force against the release of the connection between the first connecting part and the second connecting part, in addition to the above-mentioned basic connection. This makes it possible to suppress and prevent the first connecting part and the second connecting part from coming off, and to stabilize the so-called double floor structure in the event of a disaster such as an earthquake.

[0009] In a further configuration of the present invention, the moving motion direction is a substantially vertical direction, and the additional moving direction is a substantially horizontal omnidirectional direction.

[0010] According to this configuration, when constructing a double floor, the floor forming components can be connected simply by moving the connecting parts in the vertical direction, further improving ease of construction.

[0011] A further configuration of the present invention is characterized in that the additional engagement or locking portion is configured such that, when the additional movement occurs between the first connecting portion and the second connecting portion, the connection between the first connecting portion and the second connecting portion cannot be released.

[0012] According to this configuration, if additional movement occurs between the first connecting portion and the second connecting portion in a direction intersecting the direction of the movement motion, the connection between the first connecting portion and the second connecting portion cannot be released, thereby reliably preventing the first connecting portion and the second connecting portion from becoming detached.

[0013] A further configuration of the present invention is characterized in that the first connecting portions and the second connecting portions are present in multiple numbers for each of the floor forming members, and some of the multiple first connecting portions and second connecting portions are replaced with third connecting portions and fourth connecting portions which have a configuration capable of the basic connection with each other but do not have the additional engagement or locking portion configuration.

[0014] According to this configuration, some of the multiple first and second connecting parts are replaced by the third and fourth connecting parts, and the connecting structure formed by these third and fourth connecting parts does not have additional engagement or locking parts, so even if additional movement occurs in the third and fourth connecting parts in a direction intersecting the direction of movement due to shaking during an earthquake, etc., no resistance force is applied to the release of the connection state. Therefore, compared to when all connecting parts constitute additional engagement or locking parts, even if additional movement occurs in the floor forming members after an earthquake, for example, when removing them, the work can be made easier than when all connecting parts of adjacent floor forming members are constituted by a combination of the first and second connecting parts.

[0015] A further configuration of the present invention is characterized in that the first and third connecting portions of the one floor forming member are arranged adjacent to each other and at a predetermined interval on the same line, and the second and fourth connecting portions of the other floor forming member are arranged adjacent to each other and at a predetermined interval on the same line.

[0016] With this configuration, the connection points between the first connecting part and the second connecting part, and the connection points between the third connecting part and the fourth connecting part are dispersed, so that in the event of shaking such as during an earthquake, the points where the connecting parts are unlikely to come off or will not come off are dispersed, effectively making the connecting structure of the floor forming member unlikely to come off or eliminating the risk of it coming off.

[0017] Another configuration of the present invention is a connecting structure of floor-forming members that includes a plurality of floor-forming members having support parts that support a floor plate from the lower side, adjacent floor-forming members are connected to each other at their connecting parts and laid on the foundation floor surface, and the floor plate is spanned between the support parts to form a double floor, wherein the connecting part is provided on one of the adjacent floor-forming members, a convex part having a convex part that protrudes in a predetermined direction, and a concave part provided on the other of the adjacent floor-forming members, having a concave part into which the convex part of the convex part can be inserted along its protruding direction, and the connecting structure of floor-forming members is characterized in that at least one of the convex part and the concave part is provided with an additional engaging or locking part that engages or locks with each other when the convex part of the convex part is inserted into the concave part of the concave part and the convex part and the concave part are relatively displaced in a direction intersecting the insertion direction along the protruding direction.

[0018] According to this configuration, when connecting adjacent floor forming members, the convex portion of the convex portion can be easily connected by simply inserting the convex portion of the convex portion into the concave portion of the concave portion provided on each of the floor forming members. On the other hand, when the convex portion and the concave portion in the inserted state (connected state) are relatively displaced in a direction intersecting the above-mentioned insertion direction due to, for example, an earthquake, the additional engagement or locking portion provided on at least one of the convex portion and the concave portion will be in a state of engagement or locking between the convex portion and the concave portion. Therefore, when the concave portion and the convex portion are about to separate due to shaking, a new engagement or locking state is added in addition to the connected state of the concave portion and the convex portion. This makes it possible to suppress and prevent the convex portion and the concave portion from separating, and to stabilize the so-called double floor structure in the event of a disaster such as an earthquake. Effect of the Invention

[0019] As described above, according to the present invention, the basic connection of the connecting parts of adjacent floor forming members can be achieved only by the relative movement of the first connecting part and the second connecting part, which makes the connection work of adjacent floor forming members easy and provides excellent workability for the double floor structure. On the other hand, when additional movement occurs in a direction intersecting the above-mentioned movement direction due to shaking, for example, during an earthquake, resistance is generated against the release of the connection between the first connecting part and the second connecting part, so that separation of the first connecting part and the second connecting part can be suppressed and prevented, and the double floor structure can be stabilized during disasters such as earthquakes. [Brief description of the drawings]

[0020] [Figure 1] 1 is a perspective view of a floor forming member showing a first embodiment of a connecting structure of a floor forming member of the present invention. FIG. [Diagram 2] FIG. 2 is a plan view showing a case where the floor forming members of FIG. 1 are connected. [Diagram 3] 2 is a perspective view of a connecting portion provided on the floor forming member of FIG. 1. [Figure 4] FIG. 4 is a cross-sectional view of the connecting portion of FIG. 3. [Diagram 5] FIG. 4 is an explanatory diagram of a state in which the connecting parts in FIG. 3 are joined. [Figure 6] 4 is an explanatory diagram of a state in which relative displacement occurs in the connecting portion of FIG. 3. FIG. [Figure 7] FIG. 11 is a plan view showing a second embodiment of the connecting structure for floor forming members of the present invention when connecting floor forming members. [Figure 8] 8 is an explanatory diagram of a connecting portion provided on the floor forming member of FIG. 7. FIG. [Figure 9] 8 is a cross-sectional view of the connecting portion of FIG. 7 in a connected state. [Figure 10] 13 is a plan view showing a third embodiment of the connecting structure for floor forming members of the present invention when connecting floor forming members. FIG. [Figure 11] 11 is an explanatory diagram of a connecting portion provided on the floor forming member of FIG. 10. FIG. [Figure 12] 11 is a cross-sectional view of the connecting portion of FIG. 10 in a connected state. [Figure 13]11 is a perspective view of a connecting portion showing a fourth embodiment of the connecting structure of a floor forming member of the present invention. FIG. [Figure 14] 14 is a cross-sectional view of the connecting portion of FIG. 13 in a connected state. [Figure 15] 13 is a perspective view of a connecting portion showing a fifth embodiment of the connecting structure of a floor forming member of the present invention. FIG. [Figure 16] 16 is a cross-sectional view of the connecting portion of FIG. 15 in a connected state. [Figure 17] 13 is a perspective view of a floor forming member showing a sixth embodiment of the connecting structure of the floor forming member of the present invention. FIG. [Figure 18] 18 is a perspective view of a connecting portion provided on the floor forming member of FIG. 17. [Figure 19] 19 is a cross-sectional view of the connecting portion of FIG. 18 in a connected state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The embodiment of the connecting structure of the floor forming member of the present invention will be described in detail below with reference to the drawings, but each embodiment and their modified examples are merely examples for explaining the present invention, and the present invention is not limited to the contents of the description. Figure 1 is a perspective view of the floor forming member 1 of this embodiment (first embodiment) placed on the foundation floor surface, and Figure 2 is a plan view of the floor forming member 1 of Figure 1 when it is connected. This floor forming member 1 is a unitized support part 2, which is a total of 12 support parts 2, four in the horizontal direction and three in the vertical direction in this example, and a floor plate 4 is placed so as to span between the support parts 2 arranged vertically and horizontally in the figure, thereby forming a flat double floor structure.

[0022] The support 2 and floor plate 4 are the same as those described in the above Patent Document 1, and for example, the four sides of the square plate-shaped floor plate 4 are bent downward in the figure to form the bent portion 4a. The support 2 is a support leg that supports the floor plate 4, and is a square truncated pyramid with a roughly square cross section that is chamfered and is hollow inside. Slits 2a are formed on each of the four outer surfaces (side surfaces) of the support 2 of the square truncated pyramid, and the bent portion 4a of the floor plate 4 is fitted into the slits 2a to position the floor plate 4. In addition, a protrusion (not shown) formed on the lower surface of the floor plate 4 is fitted into a hole 2b formed on the upper surface of the support 2, and the floor plate 4 is also positioned by this. Incidentally, the support 2 is made of resin, and the floor plate 4 is made of steel.

[0023] The twelve support parts 2 are arranged at equal intervals vertically and horizontally on the foundation floor surface, and the lower ends of adjacent support parts 2 are connected (unitized) in a cross (or X) shape in a plan view by a band-shaped joint part 3 to form a floor forming member 1. The joint part 3 is made of resin and has flexibility. This unitized floor forming member 1 must be connected to adjacent floor forming members 1 in order to stably mount the floor plate 4 that forms a double floor by maintaining the interval between the support parts 2 as described above. Therefore, in this floor forming member 1, the band-shaped joint part 3 is extended to the side of the unit (outward in the unit deployment direction = horizontal direction), and a connecting part 5 is provided at the tip of the extension direction. That is, the connecting parts 5 are arranged at equal intervals and in a straight line on the periphery of the square floor forming member 1.

[0024] Therefore, by connecting these connecting parts 5 to each other, adjacent floor forming members 1 can be connected to each other. For example, in the example of FIG. 2, when connecting the floor forming member 1 at the top left to the floor forming member 1 arranged below it, the floor forming members 1 are connected by connecting the connecting parts 5 facing each other in the figure. Similarly, when connecting the floor forming member 1 at the top left to the floor forming member 1 arranged to the right of it, the floor forming members 1 are connected by connecting the connecting parts 5 facing each other in the figure. Similarly, when connecting the floor forming member 1 at the bottom left of the figure and the floor forming member 1 at the top right of the figure to the floor forming member 1 below them on the right, the floor forming members 1 are connected by connecting the connecting parts facing each other in the figure.

[0025] In this embodiment, the connecting parts 5 on the left and upper sides of the floor forming member 1 shown in FIG. 2 are different in configuration from the connecting parts 5 on the right and lower sides of the figure. The specific structure of the connecting parts 5 is shown in FIG. 3 and FIG. 4. FIG. 3 shows the connecting parts 5 provided at the left end and upper end of the floor forming member 1 in FIG. 2, and FIG. 4 shows the connecting parts 5 provided at the right end and lower end of the floor forming member 1 in FIG. 2. In both cases, FIG. 3(a) is a perspective view, FIG. 3(b) is an AA cross-sectional view of FIG. 3(a), and FIG. 4(b) is a BB cross-sectional view of FIG. 4(a). Note that there are also places where the connecting parts 5 are not provided at regular intervals.

[0026] The connecting portion 5 in FIG. 3 is composed of a concave portion 6 constituting the second connecting portion of the present invention, and this concave portion 6 is composed of a cylindrical concave body with a closed upper surface and an open lower surface. In other words, this concave portion 6 is composed of a covered cylindrical body, and is disposed on the foundation floor surface in the state of FIG. 3(a). This concave portion 6 is provided integrally with the joint portion 3 at the extending end of the joint portion 3. Inside this concave portion 6, a cylindrical space with an open lower side is formed, and this cylindrical space constitutes the recess 7. This recess 7 is sized to accommodate the convex portion 12 of the convex portion 10 (including the second convex portion 10A) described later, including the protrusion portion 13 described later, with a margin. The radially outer portion of the top surface of the concave portion 6 made of the covered cylinder and the upper portion of the outer circumferential surface of the concave portion 6 are formed with through-notched holes of approximately square cross section as concave portions 8, and the through-notched holes are arranged at four equal positions in the circumferential direction of the covered cylinder. The through-notched holes 8 are sized to allow projections 13 of the convex portion 10 described below to be inserted with ease.

[0027] The connecting portion 5 in FIG. 4 is composed of a convex portion 10 constituting the first connecting portion of the present invention, and this convex portion 10 is composed of a convex body integrally provided with a cylindrical convex portion 12 protruding upward from the center of a circular base portion 11 placed on the foundation floor surface. The posture of this convex portion 10 on the foundation floor surface is also arranged in the state of FIG. 4(a). As is clear from FIG. 4(b), the convex portion 12 in this embodiment is in a hollow state with an open lower surface including the base portion 11, and is essentially a hat-shaped covered cylinder. This convex portion 10 is also integrally provided with the joint portion 3 at the extending end of the joint portion 3. At the upper end of the outer peripheral surface of the convex portion 12 of this convex portion 10, a protrusion portion 13 having a substantially square cross section is integrally formed with the convex portion 12 so as to protrude radially outward, and the protrusion portion 13 is equally arranged at four positions in the circumferential direction of the convex portion 12 which is a covered cylinder. As described above, the size of the protrusions 13 is set to a size that allows them to be inserted into the recessed portion 8 of the recessed portion 6 with a margin. The outer diameter of the convex portion 12 including the four protrusions 13 is set to be slightly smaller than the inner diameter of the recessed portion 7 of the recessed portion 6. A substantially square through hole 14 is formed in the base portion 11 in a portion corresponding to the lower side of the protrusions 13 in the figure. This through hole 14 is a die-cut hole required when the protrusions 13 and the convex portion 10 are molded integrally with each other using resin.

[0028] Fig. 5 is an explanatory diagram of the state in which the convex portion 12 of the convex portion 10 of Fig. 4 is inserted into the recessed portion 7 of the recessed portion 6 of Fig. 3, Fig. 5(a) being a plan view, and Fig. 5(b) being a CC sectional view of Fig. 5(a). When actually connecting adjacent floor forming members 1 placed on a foundation floor surface, the recessed portion 7 of the recessed portion 6 of one floor forming member 1 is placed over the convex portion 12 of the convex portion 10 of the other floor forming member 1, and the convex portion 12 is inserted into the recessed portion 7. In other words, the convex portion 12 of the convex portion 10 constituting the first connecting portion and the recessed portion 7 of the recessed portion 6 constituting the second connecting portion are connected only by a relative moving motion.

[0029] At this time, as described above or as is clear from Figure 5 (a), the outer diameter of the convex portion 12 including the protrusion 13 of the convex portion 10 is slightly smaller than the inner diameter of the recess 7 of the recess 6, so that when the convex portion 12 including the protrusion 13 is inserted into the recess 7, no resistance, i.e., no force that would hinder the insertion of the two, acts. This makes it easy to insert the convex portion 12 into the recess 7 (connecting work) by placing the recess 7 of the recess 6, which is one connecting portion 5, over the convex portion 12 of the convex portion 10, which is the other connecting portion 5, when connecting adjacent floor forming members 1, and as a result, the connecting work of adjacent floor forming members 1 can be performed easily and without applying force. Conversely, in this state, it is also easy to remove the convex portion 12 of the convex portion 10, which is one connecting portion 5, from the concave portion 7 of the concave portion 6, which is the other connecting portion 5, making it easy to disconnect adjacent floor forming members 1 at a double floor construction site, for example.

[0030] The concave portion 6 and the convex portion 10 are provided in the joint portion 3 so that when the convex portion 12 of the convex portion 10 is inserted into the concave portion 7 of the concave portion 6 of the adjacent floor forming member 1, the protrusion portion 13 of the convex portion 12 faces the recessed portion 8 of the concave portion 7. In addition, as is clear from FIG. 5(b), in this inserted state, a preset gap is formed between the inner peripheral surface of the concave portion 7 of the concave portion 6 and the outer peripheral surface of the convex portion 12 of the convex portion 10, and this gap is an excess space that allows the concave portion 7 and the convex portion 12 to be displaced relative to each other in the left-right direction of the figure. That is, in this embodiment, the concave portion 6 and the convex portion 10 are allowed to move additionally in a direction intersecting the direction of the relative movement when the concave portion 6 and the convex portion 10 are joined, within a predetermined range until the outer peripheral surface of the convex portion 12 abuts against the inner peripheral surface of the concave portion 7.

[0031] FIG. 6 is an explanatory diagram of a state in which the concave portion 6 and the convex portion 10 are displaced relative to each other (additional movement) in a direction intersecting the insertion (movement) direction of the two from the state shown in FIG. 5, where FIG. 6(a) is a plan view and FIG. 6(b) is a DD cross-sectional view of FIG. 6(a). Specifically, the concave portion 6 is displaced relative to the right in the figure, and the convex portion 10 is displaced relative to the left in the figure. Such a displacement occurs, for example, during an earthquake. In this state, as is clear from FIG. 6(b), the protrusion 13 is fitted (inserted) into the recessed portion 8 on the left side of the figure. Therefore, if one attempts to remove the protrusion 12 from the recessed portion 7 in this state, the protrusion 13 will be caught and locked on the edge of the recessed portion 8, and the locking force will prevent the concave portion 6 and the convex portion 10 from being easily removed. In reality, the engagement between the two cannot be released unless either the protrusion 13 or the concave portion 6 itself forming the recess 8 is destroyed, so the connection between the concave portion 6 and the convex portion 10 cannot be released.

[0032] That is, conversely, when the concave portion 6 and the convex portion 10 are displaced relative to each other in a direction intersecting the insertion direction of the two due to the occurrence of an earthquake, the protrusion 13 and the recessed portion 8 are engaged, and the connection between the concave portion 6 and the convex portion 10 is not substantially released, so that the adjacent floor forming members 1 are maintained in a connected state, which suppresses and prevents the displacement of the support portion 2, thereby preventing the floor plate 4 from falling off, and thus providing a double floor structure with excellent reliability. In addition, since the top surface of the concave portion 6 closes the upper surface of the recess 7 and the lower end surface of the concave portion 6 abuts against the base portion 11 of the convex portion 10, the relative movement of the two in the vertical direction is restricted, and when the concave portion 6 is displaced relative to the convex portion 10 in the horizontal direction, the protrusion 13 and the recessed portion 8 are reliably engaged. The engagement between the protrusion 13 and the recessed portion 8 occurs regardless of the relative displacement in any of the four horizontal directions in which they are provided. In addition, since the lower end surface of the concave portion 6 abuts against the base portion 11 of the convex portion 10, the relative horizontal displacement between the two is smoother and more reliable than when the lower end surface of the concave portion 6 abuts directly against the foundation floor surface.

[0033] Depending on the magnitude of the relative displacement between the concave portion 6 and the convex portion 10, the protrusion 13 may not completely fit into the recessed portion 8. In such a case, when attempting to remove the concave portion 6 and the convex portion 10, the protrusion 13 may come into contact with the edge of the concave portion 8 or the inner peripheral surface of the recess 7. In such a state, the frictional force or deformation force caused by the contact between the concave portion 6 and the convex portion 10 when removing them acts as an engagement force, making it difficult to release the connection between the concave portion 6 and the convex portion 10. In all of the following embodiments in which the protrusion 13 and the recessed portion 8 are engaged or locked, including this embodiment, for example, by moving the relative displacement between the concave portion 6 and the convex portion 10 in the direction intersecting the insertion direction from the state shown in FIG. 6 so as to return, the operator can release the connection between the two without any resistance and without using a tool. In the following embodiments, similar to this embodiment, the combination of the protrusion 13 and the recess 8 constitutes an additional engagement or locking portion 9 which exerts an engagement or locking force when the recess 6 and the convex portion 10 are removed.

[0034] Next, a second embodiment of the connection structure of the floor forming member 1 of the present invention will be described. FIG. 7 is a plan view of the floor forming member 1 of this embodiment (second embodiment). The configurations of the support portion 2 and the joint portion 3 in the floor forming member 1 of this embodiment are the same as those in FIG. 1 and FIG. 2 of the first embodiment, so detailed description thereof will be omitted. In this embodiment, the concave portion 6 constituting the connection portion 5 of the floor forming member 1 is the same as that in the first embodiment, while the configuration and arrangement of the convex portion constituting the connection portion 5 are changed. Specifically, of the three connection portions 5 at the right end of FIG. 7, the uppermost and lowermost connection portions 5 are the convex portion 10 in FIG. 4, but the second convex portion 10A in FIG. 8 is used for the middle connection portion 5. Similarly, of the four connecting parts 5 at the lower end of Fig. 7, the rightmost and third connecting parts 5 from the right are the convex parts 10 in Fig. 4 constituting the first connecting part of the present invention, while the second and fourth connecting parts 5 from the right use the second convex part 10A in Fig. 8 constituting the third connecting part of the present invention (the bottommost connecting part 5 at the right end and the rightmost connecting part 5 at the lower end are the same). That is, in this embodiment, the convex part 10 in Fig. 4 which is the first connecting part and the second convex part 10A in Fig. 8 which is the third connecting part are arranged adjacent to each other on the same straight line with a predetermined distance therebetween.

[0035] FIG. 8 is an explanatory diagram of the second convex portion 10A constituting the third connecting portion of the present invention, in which FIG. 8(a) is a perspective view and FIG. 8(b) is an E-E cross-sectional view of FIG. 8(a). The second convex portion 10A in FIG. 8 is also configured by integrally providing a cylindrical convex portion 12 protruding upward from the center of the base portion 11 placed on the foundation floor surface, similar to the convex portion 10 in FIG. 4. As is clear from FIG. 8(b), the convex portion 12 in this embodiment is also hollow with an open lower surface including the base portion 11, and is essentially a hat-shaped covered cylinder. This second convex portion 10A is also integrally provided with the joint portion 3 at the extending end of the joint portion 3. This convex portion 12 is also sized to be gently accommodated in the recess 7 of the recess portion 6 in FIG. 3, but the outer diameter of the convex portion 12 is set to be slightly smaller than the inner diameter of the recess 7 in FIG. 3. The top surface of the protrusion 12 is formed with a depression 12a having a circular cross section.

[0036] FIG. 9 is a cross-sectional view of the state in which the convex portion 12 of the second convex portion 10A of FIG. 8 is inserted into the concave portion 7 of the concave portion 6 of FIG. 3. The convex portion 12 of the second convex portion 10A of this embodiment does not have a protrusion 13 like the convex portion 12 of the convex portion 10 of FIG. 4, so such a protrusion does not fit into the recessed portion 8 of the concave portion 6 of FIG. 3. Therefore, in the connecting portion 5 of the floor forming member 1 consisting of the combination of the second convex portion 10A of FIG. 8 and the concave portion 6 of FIG. 3, even if a relative displacement (additional movement) occurs between the second convex portion 10A and the concave portion 6, no locking force or engagement force is generated, and no resistance force is generated when both are removed. However, since the outer diameter of the convex portion 12 of the second convex portion 10A is set slightly smaller than the inner diameter of the concave portion 7 of the concave portion 6, the positioning accuracy in the direction intersecting the insertion direction by the outer peripheral surface of the convex portion 12 and the inner peripheral surface of the concave portion 7 is higher than that of the first embodiment.

[0037] In this embodiment, even if the second convex portion 10A and the concave portion 6 are displaced relative to each other in a direction intersecting the insertion direction, no resistance is generated to the decoupling of the two, so that even if additional horizontal movement occurs due to shaking during an earthquake or the like, the decoupling of the second convex portion 10A and the concave portion 6 is easier than when all the connecting portions 5 are composed of the combination of the convex portion 10 in Fig. 4 and the concave portion 6 in Fig. 3, and the work of decoupling adjacent floor forming members 1 is easier. In addition, the first connecting portion, the convex portion 10 in Fig. 4, and the second connecting portion, the concave portion 6 in Fig. 3, are also distributed, so that the connection of the adjacent floor forming members 1 can be effectively maintained by the engagement of the protrusion 13 of the convex portion 10 and the concave portion 7 of the concave portion 6. Furthermore, since no excess space is required between the second convex portion 10A and the concave portion 6 to allow relative displacement in a direction intersecting the insertion direction, the gap between the two can be made smaller accordingly, thereby improving the positioning accuracy of the connecting portions 5.

[0038] Next, a third embodiment of the connection structure of the floor forming member 1 of the present invention will be described. FIG. 10 is a plan view of the floor forming member 1 of this embodiment (third embodiment). The configurations of the support portion 2 and the joint portion 3 in the floor forming member 1 of this embodiment are also the same as those in FIG. 1 and FIG. 2 of the first embodiment, so detailed description thereof will be omitted. In this embodiment, the configuration and arrangement of the concave and convex portions constituting the connection portion 5 of the floor forming member 1 are changed from those in the first embodiment. Specifically, of the three connection portions 5 at the right end of FIG. 10, the second convex portion 10A of FIG. 8 of the second embodiment is used for the lowest connection portion 5. In addition, of the four connection portions 5 at the upper end of FIG. 10, the second concave portion 6A of FIG. 11 constituting the fourth connection portion of the present invention is used for the leftmost connection portion 5. The other connection portions 5 have the same configuration as those in FIG. 2.

[0039] FIG. 11 is an explanatory diagram of the second concave portion 6A constituting the fourth connecting portion of the present invention, where FIG. 11(a) is a perspective view and FIG. 11(b) is an FF cross-sectional view of FIG. 11(a). The second concave portion 6A in FIG. 11 is also a cylindrical concave portion with a closed upper surface and an open lower surface, similar to the concave portion 6 in FIG. 3. In other words, the second concave portion 6A is a covered cylinder, and is provided integrally with the joint portion 3 at the extended end of the joint portion 3, similar to the concave portion 6 in FIG. 3. Inside the second concave portion 6A, a cylindrical space with an open lower portion is formed, and this cylindrical space constitutes the recess 7. The recess 7 is sized to gently accommodate the convex portion 12 of the second convex portion 10A in FIG. 8, and its inner diameter is set to be equal to that of the recess 6 in FIG. 3. A recess 6a with a circular cross section is formed on the top surface of the second concave portion 6A.

[0040] 12 is a cross-sectional view of the state in which the convex portion 12 of the second convex portion 10A of FIG. 8 is inserted into the concave portion 7 of the second concave portion 6A of FIG. 11. As described above, the convex portion 12 of the second convex portion 10A does not have a protrusion 13 like the convex portion 12 of the convex portion 10 of FIG. 4, and the concave portion 7 of the second concave portion 6A of FIG. 11 does not have a concave portion 8 like the concave portion 7 of the concave portion 6 of FIG. 3, so such a protrusion does not fit into the concave portion. Therefore, in the connecting portion 5 of the floor forming member 1 consisting of the combination of the second convex portion 10A of FIG. 8 and the second concave portion 6A of FIG. 11, even if a relative displacement occurs between the second convex portion 10A and the second concave portion 6A, no locking force or engagement force is generated, and no resistance force is generated when the two are removed. However, since the outer diameter of the convex portion 12 of the second convex portion 10A is set slightly smaller than the inner diameter of the concave portion 7 of the second concave portion 6A, the positioning accuracy in the direction intersecting the insertion direction by the outer surface of the convex portion 12 and the inner surface of the concave portion 7 is higher than that of the first embodiment described above.

[0041] In this embodiment, even if the second convex portion 10A and the second concave portion 6A are displaced relative to each other in a direction intersecting the insertion direction, no resistance is generated to the decoupling of the two, so that even if additional horizontal movement occurs due to shaking during an earthquake or the like, the decoupling of the second convex portion 10A and the second concave portion 6A is easier than when all the connecting portions 5 are composed of the combination of the convex portion 10 in Fig. 4 and the concave portion 6 in Fig. 3, and the work of decoupling adjacent floor forming members 1 is easier. In addition, the first connecting portion, the convex portion 10 in Fig. 4, and the concave portion 6 in Fig. 3, which is the second connecting portion, are also distributed, so that the connection of the adjacent floor forming members 1 can be effectively maintained by the engagement of the protrusion portion 13 of the convex portion 10 and the concave portion 7 of the concave portion 6. Furthermore, since no excess space is required between the second convex portion 10A and the second concave portion 6A to allow relative displacement in a direction intersecting the insertion direction, the gap between the two can be made smaller accordingly, thereby improving the positioning accuracy of the connecting portions 5.

[0042] Next, a fourth embodiment of the connection structure of the floor forming member 1 of the present invention will be described. FIG. 13 is a perspective view of the connection portion 5 of this embodiment (fourth embodiment), and FIG. 14 is a cross-sectional view of the connection portion 5 of FIG. 13 in a connected state. FIG. 13(a) is a modified example of the concave portion 6 of FIG. 3 of the first embodiment, and similarly, FIG. 13(b) is a modified example of the convex portion 10 of FIG. 4 of the first embodiment. Equivalent configurations are given the same reference numerals, and detailed descriptions thereof will be omitted. The main difference between the two is that the recessed portion 7 of the concave portion 6 of FIG. 3 has four recessed portions 8, whereas FIG. 13(a) has three recessed portions evenly distributed. Similarly, the convex portion 12 of the convex portion 10 of FIG. 4 has four protrusions 13, whereas FIG. 13(b) has three protrusions evenly distributed. In addition, in this embodiment, a hemispherical abutment portion 15 is formed on the tip surface in the protruding direction of each of the protrusions 13. The outer diameter of the protruding tip of these three contact portions 15 is set to be equal to or slightly larger than the inner diameter of the recess 7 of the recess 6. Note that in this embodiment as well, a through hole 14 for punching is formed in the convex portion 10. Also in this embodiment as well, an excess space is provided between the outer peripheral surface of the convex portion 12 of the convex portion 10 and the inner peripheral surface of the recess 7 of the recess 6 to allow relative displacement between them in a direction intersecting the insertion direction.

[0043] 14, when a relative displacement occurs between the concave portion 6 and the convex portion 10 in this embodiment in a direction intersecting the insertion direction, the protrusion 13 of the convex portion 10 fits into the recessed portion 8 of the concave portion 6, as in the first embodiment, and when an attempt is made to remove the concave portion 6 and the convex portion 10, the protrusion 13 gets caught on the edge of the recessed portion 8, generating an engagement force that makes it difficult for the concave portion 6 and the convex portion 10 to be removed. In effect, the connection between the two cannot be released unless the two parts that are engaged are destroyed by each other. In this embodiment, the outer diameter of the three abutment parts 15 is set to be equal to or slightly larger than the inner diameter of the recess 7, so that when attempting to remove the recess 6 and the protrusion 10, the inner circumferential surfaces of the abutment parts 15 and the recess 7 come into contact with each other, generating friction and deformation between them, and this friction and deformation become an engagement force, and the engagement force becomes a resistance force when removing the recess 6 and the protrusion 10, making it difficult for the recess 6 and the protrusion 10 to come off. Similarly, when inserting the protrusion 12 of the protrusion 10 into the recess 7 of the recess 6, the inner circumferential surface of the recess 7 comes into contact with the abutment parts 15, generating friction and deformation between them, thereby ensuring the insertion of the two.

[0044] Next, a fifth embodiment of the connection structure of the floor forming member 1 of the present invention will be described. FIG. 15 is a perspective view of the connection portion 5 of this embodiment (fifth embodiment), and FIG. 16 is a cross-sectional view of the connection portion 5 of FIG. 15 in a connected state. FIG. 15(a) is a modified example of the concave portion 6 of FIG. 3 of the first embodiment, and similarly, FIG. 15(b) is a modified example of the convex portion 10 of FIG. 4 of the first embodiment. Equivalent configurations are given the same reference numerals, and detailed descriptions thereof will be omitted. The main difference between the two is that while the recess 7 of the concave portion 6 of FIG. 3 has four recesses 8, the recess 6 of FIG. 15(a) is formed in a ring shape, and the portion above this ring-shaped recess 6 corresponds to the recess 8 of the present invention, as described later. Similarly, while the protrusions 13 are provided at four locations on the protrusion 12 of the protrusion 10 in Fig. 4, they are equally spaced (oppositely arranged) at two locations in Fig. 15(b). In this embodiment, the dimension from the upper surface of the base 11 in the protrusion 10 to the lower surface of the protrusion 13 is set to be smaller than the height dimension of the ring-shaped recess 6. Note that, in this embodiment as well, the protrusion 10 is formed with a through hole 14 for punching. Also, in this embodiment as well, an excess space is provided between the outer peripheral surface of the protrusion 12 of the protrusion 10 and the inner peripheral surface of the recess 7 of the recess 6 to allow relative displacement of the two in a direction intersecting the insertion direction.

[0045] 16, when a relative displacement occurs between the concave portion 6 and the convex portion 10 in this embodiment in a direction intersecting the insertion direction, the protrusion 13 of the convex portion 10 protrudes from the upper surface of the ring-shaped concave portion 6. Therefore, when an attempt is made to remove the concave portion 6 and the convex portion 10, the protrusion 13 gets caught on the upper surface of the concave portion 6 (the edge of the recessed portion 8) and an engagement force is generated, and this engagement force makes it difficult for the concave portion 6 and the convex portion 10 to be removed. In reality, the connection between the two cannot be released unless the two engaged portions are destroyed by each other.

[0046] Next, a sixth embodiment of the connection structure of the floor forming member 1 of the present invention will be described. Figure 17 is a perspective view of the floor forming member 1 of this embodiment (sixth embodiment), Figure 18 is an explanatory diagram of the connection portion 5 of adjacent floor forming members 1, and Figure 19 is a cross-sectional view of Figure 18 (b) in a state where the connection portion 5 of Figure 18 is connected. The floor forming member 1 of this embodiment is different from those of the first to fifth embodiments, and has a square platform shape on the upper surface, and the side portion 16 constituting the leg of the platform is made of a plate portion hanging vertically from the four sides of the square upper surface, and the center portion on the lower end side is cut out, and the side portions 16 are integrally connected to each other. And, the connection portion 5 is provided at two central positions near the upper end of each of the side portions 16. Of these connection portions 5, the connection portion 5 of the left side portion 16 shown in Figure 17 is made of a convex portion 10, and the connection portion 5 of the right side portion 16 is made of a concave portion 6.

[0047] As shown in FIG. 18(a), the concave portion 6 has a recess 7 consisting of a square hole provided in a plate material constituting the side portion 16. In this example, the recess 7 also serves as the recessed portion 8 of the above embodiment. On the other hand, as shown in FIG. 18(a), the convex portion 10 has a short protruding portion 12 that has a height equivalent to the height of the square recess 7, has flat upper and lower surfaces, and has both side surfaces with arcuate cross sections, protruding from the side portion 16, and at the protruding tip, a plate-like protrusion 13 is provided that protrudes from both side surfaces in the left-right direction in FIG. 18 and has an arcuate protruding tip surface. The dimension between the tips of the protruding portions 13 facing in opposite directions is set to be slightly smaller than the left-right dimension of the square recess 7. Also, as shown in FIG. 18(b), an excess space is provided between the outer side surface of the protruding portion 12 in the left-right direction in the figure and the inner side surface of the recess 7 in the left-right direction in the figure to allow relative displacement of the two in the left-right direction in the figure.

[0048] Therefore, when the convex portion 12 of the convex portion 10 is inserted into the concave portion 7 of the concave portion 6 together with the protrusion portion 13 as shown in Fig. 18(b) and Fig. 19 in order to connect the adjacent floor forming members 1, the two can be easily inserted without interfering with each other. On the other hand, as can be inferred from Fig. 18(b), when the concave portion 6 and the convex portion 10 of the adjacent floor forming members 1 are relatively displaced in the surplus space in the left-right direction of Fig. 18, that is, in the direction intersecting with the insertion direction, the edge of the concave portion 7 (recessed portion 8) enters the gap between the protrusion portion 13 of the convex portion 10 inserted into the concave portion 7 of the concave portion 6 and the side portion 16 of the floor forming member 1. In this state, when an attempt is made to remove the concave portion 6 and the convex portion 10, the protrusion portion 13 of the convex portion 10 gets caught on the edge of the concave portion 7 (recessed portion 8), and the engaging force makes it difficult for the concave portion 6 and the convex portion 10 to be removed. In effect, the connection between the two cannot be released unless the two parts that are engaged are destroyed by each other.

[0049] In this way, in the connection structure of the floor forming members 1 of these embodiments, when connecting adjacent floor forming members 1, they can be easily connected by simply inserting the convex portion 12 of the convex portion 10 into the concave portion 7 of the concave portion 6 provided in each of those floor forming members 1. On the other hand, if the convex portion 10 and the concave portion 6 in the inserted state (connected state) are relatively displaced in a direction intersecting the insertion direction due to, for example, an earthquake, the additional engagement or locking portion 9 provided on the convex portion 10 and the concave portion 6 engages or locks between the convex portion 10 and the concave portion 6, so that the convex portion 10 and the concave portion 6 can be suppressed or prevented from coming off, and the connection between the adjacent floor forming members 1 can be made less likely to come off.

[0050] Furthermore, when the convex portion 12 of the convex portion 10 of adjacent floor forming members 1 is inserted into the concave portion 7 of the concave portion 6, and the convex portion 10 and the concave portion 6 are displaced relative to each other in a direction intersecting the insertion direction, the protrusion 13 provided on the convex portion 12 or the concave portion 7 is inserted (fitted) into the concave portion 8 provided on the concave portion 6 or the convex portion 10. In this state, even if a force is applied to remove the convex portion 12 of the convex portion 10 from the concave portion 7 of the concave portion 6, the protrusion 13 and the concave portion 8 engage or lock, and the two do not easily come apart due to the engaging or locking force.

[0051] Furthermore, when the convex portion 12 of the convex portion 10 of adjacent floor forming members 1 is inserted into the concave portion 7 of the concave portion 6, the convex portions 10 and the concave portions 6 are displaced relative to each other in a direction intersecting the insertion direction, and in this state a force is applied to remove the convex portion 12 of the convex portion 10 from the concave portion 7 of the concave portion 6, if the above-mentioned protrusion portion 13 is provided on the convex portion 12, the protrusion portion 13 will abut against the inner wall of the concave portion 7, and if the protrusion portion 13 is provided on the concave portion 7, the protrusion portion 13 will abut against the outer wall of the convex portion 12, thereby causing an engagement force involving friction or deformation at the abutment between the two, and as a result, even if a force is applied to remove the convex portion 12 of the convex portion 10 from the concave portion 7 of the concave portion 6, the two will not easily come off due to the engagement force.

[0052] The insertion direction of the concave portion 6 and the convex portion 10 is set to be approximately vertical, and the direction intersecting the insertion direction is set to be approximately horizontal. Therefore, the two can be easily joined by inserting the convex portion 12 of the convex portion 10 of the floor forming member 1 so as to cover the concave portion 7 of the concave portion 6 of the adjacent floor forming member 1 from above. On the other hand, when a force in the approximately horizontal direction is applied during an earthquake, the convex portion 10 and the concave portion 6 are relatively displaced in the approximately horizontal direction, and an engaging force or an engaging force is generated by the additional engaging or engaging portion 9, so that even if a force is applied to pull the convex portion 12 of the convex portion 10 out of the concave portion 7 of the concave portion 6, the two do not easily come off due to the engaging or engaging force.

[0053] The above describes the connection structure of the floor forming member 1 according to the embodiment, but the present invention is not limited to the configuration described in the above embodiment, and various modifications are possible within the scope of the gist of the present invention. For example, in the above embodiment, the protrusion 13 is provided on the protrusion 12 of the protruding portion 10, and the recessed portion 8 is provided on the recessed portion 7 of the recessed portion 6, but the protrusion 13 and the recessed portion 8 that can be fitted (inserted) into each other may be provided, for example, in the recessed portion 7 of the recessed portion 6 and the protrusion 13 in the protrusion 12 of the protruding portion 10. In particular, the recessed portion 8 does not necessarily have to be provided in the recessed portion 7 or the protrusion 12, and may be provided in a portion of the protruding portion 10 or the recessed portion 6 other than those.

[0054] In the above embodiment, a configuration is exemplified in which the concave portion 6 and the convex portion 10 do not engage or interfere with each other when coupled, and the coupling release force is almost negligible when there is no additional movement. However, any configuration may be used as long as the concave portion 6 and the convex portion 10 are capable of additional movement relative to each other after they are coupled, and the coupling release force after the additional movement is greater than in a state without the additional movement.

[0055] In addition, in the above embodiment, the orientation and arrangement of the protrusions 13 and recesses 8 are constant in all connecting portions 5, but their orientation and arrangement may be any orientation or arrangement that allows them to fit into each other when a relative displacement occurs in a direction intersecting the insertion direction.

[0056] In addition, in the above embodiment, only examples have been described in which the protrusions 13 and recesses 8 are evenly arranged on the outer periphery of the convex portions 12 and concave portions 7, but these may be arranged in any manner so long as they fit into each other when a relative displacement occurs in a direction intersecting the insertion direction.

[0057] Furthermore, the number of protrusions 13 and recesses 8 formed is not limited to the above, and any number may be provided as long as they are arranged so that they fit into each other when a load is applied relative to the direction intersecting the insertion direction.

[0058] Furthermore, the combinations of the concave portion 6 and the second concave portion 6A, and the convex portion 10 and the second convex portion may be arranged by selectively interchanging those that can be joined together, and are not limited to the arrangements shown in the examples.

[0059] Furthermore, in the above embodiment, the protrusion 13 and the recess 8 do not restrict the movement of the concave portion 6 and the convex portion 10 relative to each other within the excess space formed between the outer peripheral surface of the recess 7 and the inner peripheral surface of the convex portion 12. However, a configuration may also be used in which the space between the protrusion 13 and the recess 8 restricts additional movement between the concave portion 6 and the convex portion 10, and the outer peripheral surface of the convex portion 12 and the inner peripheral surface of the recess 7 do not restrict the additional movement. Furthermore, any configuration may be used to restrict the additional movement of the concave portion 6 and the convex portion 10 as long as the movement between them is restricted within a range that satisfies the spirit of the present invention.

[0060] In addition, in the above embodiment, 12 support parts 2 are arranged in 3 rows and 4 columns for one floor formation member 1, but the number of support parts may be changed as appropriate and may be any number of rows and columns.

[0061] Furthermore, the shape of the support portion 2 does not have to be a substantially square shape with chamfered corners in a plan view, and may be, for example, a circle or other shape, a columnar body with a polygonal base, or any other support structure.

[0062] In addition, in the above embodiment, the ceiling surface of the recess 7 and the top surface of the protrusion 12 are not in contact with each other, but if the protrusion 13 is designed to face the recess 8, it is acceptable for the ceiling surface of the recess 7 and the top surface of the protrusion 12 to be in contact with each other.

[0063] Furthermore, in the above embodiment, the recess 8 is provided across the top surface and outer peripheral surface of the concave portion 6, but it is also possible to only provide a notched through hole in the outer peripheral surface portion. In this case, it is sufficient to form an engagement portion 13 on the convex portion 10 at a position where it can fit into the recess 8 when a relative displacement occurs in a direction intersecting the insertion direction.

[0064] In addition, in the above embodiment, the abutment portion 15 is hemispherical in shape, but this abutment portion 15 may have any structure, such as a polygonal column, a thin plate, a cone, or any other structure that provides an appropriate sense of engagement with the object it abuts.

[0065] Furthermore, in the above embodiment, only the connecting portion 5 is described as being connected by inserting the convex portion 10 into the concave portion 6, but the connecting structure of the floor forming member of the present invention is also applicable to connecting portions that are connected by any other type of connecting method.

[0066] Furthermore, the connecting structure of the floor forming member of the present invention is not limited to the type of double floor exemplified in the above embodiment, but can be applied to various floor forming members, including height-adjustable double floors, etc. [Explanation of symbols]

[0067] 1 Floor forming material 2 Support part 3 Joint 4 Floor Plate 5 Connecting part 6 Concave portion (second connecting portion) 6A Second concave portion (fourth connecting portion) 7 Recess 8. Depression 9 Additional engagement or locking parts 10 Convex portion (first connecting portion) 10A Second convex portion (third connecting portion) 12 Convex part 13 Protrusion 15 Contact part

Claims

1. A floor forming member connection structure that includes a plurality of floor forming members each having a support portion that supports a floor plate from below, and that allows the formation of a double floor by connecting adjacent floor forming members to each other at their connecting portions and laying the floor plate on the foundation floor surface and bridging the floor plate between the supporting portions, The connecting portion has a first connecting portion provided on one of the adjacent floor forming members and a second connecting portion provided on the other, the second connecting portion being basically connected to the first connecting portion only by the relative movement of the adjacent floor forming members; The first connecting portion and the second connecting portion have a configuration that allows additional movement within a predetermined range in a direction intersecting the direction of the moving motion of the adjacent floor forming members in the basic connection state, A connecting structure for floor forming members, characterized in that the first connecting portion and the second connecting portion are provided with an additional engagement or locking portion that generates, in addition to the basic connected state, a resistance force against release of the connected state between the first connecting portion and the second connecting portion when the additional movement occurs.

2. 2. The connecting structure of floor forming members according to claim 1, wherein the moving direction is substantially vertical, and the additional moving direction is substantially horizontal in all azimuth directions.

3. A floor forming member connection structure that includes a plurality of floor forming members each having a support portion that supports a floor plate from below, and that allows the formation of a double floor by connecting adjacent floor forming members to each other at their connecting portions and laying the floor plate on the foundation floor surface and bridging the floor plate between the supporting portions, The connecting portion has a first connecting portion provided on one of the adjacent floor forming members and a second connecting portion provided on the other, the second connecting portion being basically connected to the first connecting portion only by the relative movement of the adjacent floor forming members; The first connecting portion and the second connecting portion have a configuration that allows additional movement within a predetermined range in a direction intersecting the direction of the moving motion of the adjacent floor forming members in the basic connection state, The first connecting portion and the second connecting portion are provided with an additional engagement or locking portion that generates a resistance force against release of the connection state between the first connecting portion and the second connecting portion in addition to the basic connection state when the additional movement occurs, A connecting structure for floor forming members, characterized in that the additional engagement or locking portion is configured such that when the additional movement occurs between the first connecting portion and the second connecting portion, the connection between the first connecting portion and the second connecting portion cannot be released.

4. The connecting structure of floor forming members described in any one of claims 1 to 3, characterized in that there are multiple first connecting portions and second connecting portions for each of the floor forming members, and some of the multiple first connecting portions and second connecting portions have a configuration that allows for the basic connection to each other, but are replaced with third connecting portions and fourth connecting portions having a structure that does not have the additional engagement or locking portion configuration.

5. The one floor forming member has the first connecting portion and the third connecting portion arranged adjacent to each other on the same straight line at a predetermined interval, The connecting structure of floor forming members as described in claim 4, characterized in that the other floor forming member has the second connecting portion and the fourth connecting portion arranged adjacent to each other on the same straight line at a predetermined interval.

6. A floor forming member connection structure that includes a plurality of floor forming members having support parts that support the floor plate from the lower side, and that allows the formation of a double floor by connecting adjacent floor forming members to each other at their connecting parts and laying them on the foundation floor surface, and bridging the floor plate between the supporting parts, The connecting portion is A convex portion provided on one of the adjacent floor forming members and having a convex portion protruding in a predetermined direction; A concave portion is provided on the other of the adjacent floor forming members, and has a concave portion into which the convex portion of the convex portion can be inserted along the protruding direction. A connecting structure for floor forming members, characterized in that at least one of the convex portion and the concave portion is provided with an additional engaging or locking portion which engages or locks with each other when the convex portion of the convex portion is inserted into the concave portion of the concave portion and the convex portion and the concave portion are relatively displaced in a direction intersecting the insertion direction along the protruding direction.

Images