Iron plate connector

Abstract

To provide a laying iron plate connecting fitting capable of stably connecting laying iron plates over a long period of time.SOLUTION: A laying iron plate connection fitting 100 includes an upper member 1, a lower member 3, and a fastening bolt 5 for fastening the upper member 1 and the lower member 3, and connects a pair of laying iron plates P arranged in a first lateral direction. The upper member 1 has an inclined lower surface 11 inclined downward from the fastening bolt 5 toward both outer end portions 15 in the first lateral direction in a longitudinal sectional view. The lower member 3 has an inclined upper surface 31 inclined upward from the fastening bolt 5 toward both outer sides 35 in the first lateral direction in the same cross-sectional view. When the upper member 1 is fastened to the lower member 3 in the first mounting posture, the interval between the inclined upper surface 11 and the inclined lower surface 31 is reduced from the fastening bolt 5 toward both outer end portions 15,35 in the first lateral direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a deck iron plate connector. [Background technology]

[0002] At construction and civil engineering work sites, steel plates are laid on muddy soil to ensure the passage of construction vehicles, workers, and the like. To eliminate unevenness and misalignment between adjacent steel plates, it is preferable for the steel plates to be connected to each other. Conventionally, these plates have been connected by partial welding using small pieces of iron. However, welding methods have drawbacks, such as the time-consuming welding process and the risk of small pieces of iron peeling off in parts, causing damage to vehicle tires. In response to these issues, a steel plate connecting fitting for connecting steel plates has been proposed, as described in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3201976 Summary of the Invention [Problem to be solved by the invention]

[0004] The steel plate connector described in Patent Document 1 sandwiches a pair of steel plates between a pair of members from above and below, and firmly fastens them in the vertical direction with bolts. This fastens the upper and lower members by sandwiching the pair of steel plates, connecting the steel plates. At a work site, vehicles repeatedly pass over the steel plates, repeatedly applying heavy vertical vibration loads to the steel plate connector through the steel plates. In the steel plate connector described in Patent Document 1, the bolt axial force generated by tightening the bolts fastens the upper and lower members by sandwiching the steel plates. However, when heavy vibration loads are applied to the steel plate connector described in Patent Document 1, the bolt axial force fluctuates due to the steel plates moving between the sandwiched upper and lower members, causing the bolt to loosen slightly. Repeated cycles of this over a long period of time can reduce the bolt axial force, potentially causing the bolt to loosen. In this case, the upper and lower members will no longer be able to maintain their fastening by sandwiching the steel plates, and the steel plates may become disconnected.

[0005] Furthermore, with the steel plate connector described in Patent Document 1, in order to effectively fasten the upper and lower components across a pair of steel plates, it is necessary to adjust the relative positional relationship between the lower component and the pair of steel plates in advance. However, with the steel plate connector described in Patent Document 1, after positioning the lower component relative to one steel plate, the lower component can move freely when positioning it relative to the other steel plate, making it difficult to accurately position the lower component relative to both steel plates. If accurate positioning is not achieved, the pair of steel plates will not be effectively connected, and there is a risk that the connection between the steel plates will be released after long-term use. In other words, the steel plate connector described in Patent Document 1 has the problem of making it difficult to stably connect steel plates over long periods of time.

[0006] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a metal fitting for connecting floor steel plates that can stably connect floor steel plates over a long period of time. [Means for solving the problem]

[0007] According to one aspect of the present invention, the insole steel plate connecting fitting is a insole steel plate connecting fitting for connecting a first insole steel plate and a second insole steel plate arranged side by side in a first horizontal direction perpendicular to the plate thickness direction of the first insole steel plate, a lower member disposed below the first and second steel plates; an upper member disposed above the first and second sole plates; a fastening bolt for fastening the upper member and the lower member together with the first and second steel plates sandwiched therebetween; Equipped with the upper member can be fastened to the lower member by switching between a first mounting position and a second mounting position; The fastening bolt is disposed between an end of the first steel plate and an end of the second steel plate, the lower member has a pair of inclined upper surfaces that incline upward from the fastening bolt toward both outer ends in the first horizontal direction in a vertical cross-sectional view before being fastened; the upper member has a pair of inclined lower surfaces that incline downward from the fastening bolt toward both outer ends in the first horizontal direction in the cross-sectional view, When the upper member is fastened to the lower member in the first mounting position, the distance between the inclined upper surface and the inclined lower surface decreases from the fastening bolt toward both outer ends in the first horizontal direction.

[0008] According to this, in the steel plate connector, the first and second steel plates (hereinafter referred to as the "pair of steel plates") are sandwiched between the inclined lower surface that is shaped like a V in cross section and the inclined upper surface that is shaped like an inverted V in cross section, thereby forming a predetermined space between the upper and lower members and the upper and lower surfaces of the pair of steel plates. The pair of steel plates are sandwiched vertically at both outer ends of the upper and lower members. That is, the pair of steel plates are sandwiched between the upper and lower members at positions on the upper and lower surfaces that are approximately symmetrical with respect to the first horizontal direction. This effectively fastens the upper and lower members by sandwiching the pair of steel plates. Furthermore, when vertical vibrations are input to the pair of steel plates as described above, the ends of each steel plate can move vertically within the predetermined space, with the portions where the upper and lower members sandwich the pair of steel plates as fulcrums. That is, the vibration input applied to the pair of steel plates is converted into movement of the ends of each steel plate. This suppresses deformation of the upper and lower members due to vibration input, thereby suppressing a decrease in the axial force of the fastening bolt. Furthermore, by forming the predetermined space as described above, the upper and lower members can elastically deform within the predetermined space while clamping their respective sheet metal plates at their outer ends. In other words, the pair of sheet metal plates are clamped from above and below by the upper and lower members, which have already been elastically deformed. Therefore, even if the above-mentioned vertical vibrations are input to the upper and lower members, the force required to clamp the sheet metal plates is unlikely to be lost, and the pair of sheet metal plates can continue to be stably clamped by the upper and lower members. As described above, the sheet metal plate connecting fitting effectively fastens the upper and lower members by clamping the pair of sheet metal plates, and by continuing to clamp the pair stably even when vibrations are input from outside, a decrease in the axial force of the fastening bolt is suppressed, thereby suppressing bolt loosening caused by this.

[0009] In the inclined upper surface of the insole steel plate connecting fitting according to the second invention, the inclination of both outer sides in the first horizontal direction when viewed in cross section is smaller than the inclination of the inner side, The fastening bolt fastens the upper member and the lower member at their ends in a second horizontal direction perpendicular to both the plate thickness direction and the first horizontal direction, the lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which a fastening bolt is fastened; the upper member is rotated from the first mounting position around the axis of the fastening bolt by a predetermined angle toward one of the first and second sole plates to assume a second mounting position; When the upper member is fastened to the lower member in the second mounting position with one of the steel plates sandwiched between them, The inclined lower surface abuts against the upper surface of the protrusion and the upper surface of one of the sole plates, The distance between the inclined upper surface and the inclined lower surface is smaller on the inside than on the outside in the first horizontal direction.

[0010] According to this, the insulated steel plate connector clamps one of the inclined upper surfaces of the lower member and both outer ends of the upper member in the second mounting position. In other words, when the insulated steel plate connector is used with the upper member in the second mounting position, the upper and lower members are fastened by clamping only one of the insulated steel plates. At this time, the upper member in the second mounting position is positioned facing one of the inclined upper surfaces away from the fastening bolts, so the upper side of the other inclined upper surface is open. Therefore, while the insulated steel plate connector clamps one of the insulated steel plates, the other insulated steel plate can be placed on the other inclined upper surface. This allows the insulated steel plate connector to temporarily connect and position a pair of insulated steel plates prior to connecting them. Specifically, when one insulated steel plate is clamped between the upper and lower members as described above and the fastening bolts are tightened, the one insulated steel plate is clamped between the inclined lower surface and one of the inclined upper surfaces, with the abutment between the inclined lower surface and the protrusion serving as a fulcrum. In this case, because the distance between the inclined lower surface and one of the inclined upper surfaces is smaller on the inside than on the outside in the first horizontal direction, one of the sheet steel plates is ultimately clamped between both outer ends of the inclined lower surface and the inside of the inclined upper surface. In other words, the one sheet steel plate is securely clamped near its tip by the upper and lower members. As a result, the pair of sheet steel plates are clamped near their tips at positions that are approximately symmetrical with respect to the first horizontal direction, and the upper and lower members are effectively fastened together by sandwiching the sheet steel plates. As a result, the sheet steel plate connecting fittings can efficiently temporarily connect the sheet steel plates, allowing for accurate positioning for connecting the pair of sheet steel plates.

[0011] In the insulated steel plate connecting fitting according to the third invention, the inclined upper surface has a first inclined upper surface on the inside and a second inclined upper surface on the outside in the first horizontal direction, the first inclined upper surface is inclined upward at a first angle from the fastening bolt toward both outer sides in the first horizontal direction in the cross-sectional view; the second inclined upper surface is inclined upward at a second angle smaller than the first angle from both outer sides of the first inclined upper surface toward both outer ends in the first horizontal direction in the cross-sectional view; This is characterized in that when the upper member is fastened to the lower member in the second mounting position with one of the steel plates sandwiched between them, the distance between the first inclined upper surface and the inclined lower surface is smaller than the distance between the second inclined upper surface and the inclined lower surface.

[0012] According to these, when one of the steel sheet connecting fittings is sandwiched between both outer ends of the inclined lower surface and the inclined upper surface, with the abutment points between the inclined lower surface and the protrusions as fulcrums, the distance between the inclined lower surface and the first inclined upper surface is smaller than the distance between the inclined lower surface and the second inclined upper surface, so that the one of the steel sheet connecting fittings is ultimately sandwiched between both outer ends of the inclined lower surface and the first inclined upper surface. In other words, the one of the steel sheet connecting fittings is securely sandwiched near its tip by the upper and lower members. Therefore, the steel sheet connecting fitting can achieve the same effect as the second invention with a simple configuration.

[0013] In the deck iron plate connecting fitting according to the fourth invention, the inclined lower surface is inclined downward at the same inclination as the inclined upper surface when viewed in cross section.

[0014] In the deck iron plate connecting fitting according to the fifth invention, the inclined lower surface is inclined downward at an angle equal to the second angle in the cross-sectional view.

[0015] According to these, the insulated steel plate connecting fittings can ensure that the volumes of the predetermined spaces formed between the upper and lower surfaces of a pair of insulated steel plates and the upper and lower members are approximately the same. Therefore, the insulated steel plate connecting fittings can be configured so that, when vibration input as described above is applied to the insulated steel plates, the tips of the insulated steel plates can move sufficiently in the vertical direction and the elastic deformation of the upper and lower members can be fully tolerated. Therefore, the insulated steel plate connecting fittings can reliably achieve the same effects as the first invention.

[0016] In the deck iron plate connector according to the sixth aspect of the invention, the distance between the two outer ends of the inclined lower surface in the first horizontal direction is wider than the distance between the two outer ends of the inclined upper surface in the first horizontal direction.

[0017] Each of the pair of floor steel plates may be positioned with a slight downward tilt from the fastening bolt toward both outer ends in the first horizontal direction due to the weight of the floor steel plate. In this case, the surface normal direction of each floor steel plate is tilted slightly upward and outward. By being configured as described above, the sixth invention can be configured so that the force acting on the upper surface of each floor steel plate acts from the outside rather than the force acting on the lower surface. This allows the floor steel plate connecting fitting to be configured so that the floor steel plates are clamped from above and below on approximately the same normal line of each floor steel plate. As a result, the upper and lower members can be effectively fastened by sandwiching the pair of floor steel plates.

[0018] In the floor iron plate connecting fitting according to the seventh aspect of the present invention, both side surfaces in the first horizontal direction of the protruding portion are formed to extend in the second horizontal direction, perpendicular to the first inclined upper surface.

[0019] The ends of steel plates are generally formed so that their sides are approximately perpendicular to the top and bottom surfaces. As explained above, when temporarily connecting a pair of steel plates, one of the steel plates is clamped against the first inclined upper surface. Because both sides of the protrusion are configured as described above, the sides of the protrusion and the side of the steel plate are positioned so that they are approximately parallel. This prevents the side of the steel plate from unintentionally coming into contact with the side of the protrusion before the other steel plate is fully inserted inside the steel plate connecting fitting. As a result, the steel plate connecting fitting can reliably clamp the area near the tip of the steel plate between the first inclined upper surface and the inclined lower surface, effectively temporarily connecting a pair of steel plates.

[0020] The insole steel plate connecting fitting according to the eighth invention is a insole steel plate connecting fitting for connecting a first insole steel plate and a second insole steel plate arranged side by side in a first horizontal direction perpendicular to the plate thickness direction of the first insole steel plate, a lower member disposed below the first and second steel plates; an upper member disposed above the first and second sole plates; a fastening bolt for fastening the upper member and the lower member together with the first and second steel plates sandwiched therebetween; Equipped with the upper member can be fastened to the lower member by switching between a first mounting position and a second mounting position; The fastening bolt is disposed between an end of the first steel plate and an end of the second steel plate, the lower member has a pair of inclined upper surfaces that incline upward from the fastening bolt toward both outer ends in the first horizontal direction in a vertical cross-sectional view before being fastened; When the upper member is fastened to the lower member, the distance between the inclined upper surface and the lower surface of the upper member decreases from the fastening bolt toward both outer ends in the first horizontal direction.

[0021] The insole steel plate connecting fitting according to the ninth invention is a insole steel plate connecting fitting for connecting a first insole steel plate and a second insole steel plate arranged side by side in a first horizontal direction perpendicular to the plate thickness direction of the first insole steel plate, a lower member disposed below the first and second steel plates; an upper member disposed above the first and second sole plates; a fastening bolt for fastening the upper member and the lower member together with the first and second steel plates sandwiched therebetween; Equipped with The fastening bolt is disposed between an end of the first steel plate and an end of the second steel plate, the upper member has a pair of inclined lower surfaces that incline downward from the fastening bolt toward both outer ends in the first horizontal direction in a vertical cross-sectional view before being fastened; When the upper member is fastened to the lower member, the distance between the inclined lower surface and the upper surface of the lower member decreases from the fastening bolt toward both outer ends in the first horizontal direction.

[0022] According to these, a predetermined space is formed between the upper or lower member and the upper or lower surfaces of the pair of steel plates in the steel plate connector. This allows the ends of each steel plate to move upward or downward within the predetermined space, with the points where the upper or lower member clamps the pair of steel plates as fulcrums when vertical vibrations are applied to the pair of steel plates. Furthermore, the pair of steel plates are clamped vertically between the outer ends of the upper member and the lower member, or between the outer ends of the upper member and the lower member. In other words, the pair of steel plates are clamped between the upper and lower members at positions approximately symmetrical with respect to the first horizontal direction on the upper and lower surfaces. Furthermore, by forming the predetermined space as described above, the upper or lower member can elastically deform within the predetermined space while clamping the respective steel plates at their outer ends. In other words, the pair of steel plates are clamped from above or below by the upper or lower member, which has already been elastically deformed. Therefore, the steel plate connector can achieve the same effects as the first invention.

[0023] The insole steel plate connecting fitting according to the tenth invention is the insole steel plate connecting fitting according to the eighth invention, wherein the inclination of the inclined upper surface on both outer sides in the first horizontal direction as viewed in cross section is smaller than the inclination of the inner side; The fastening bolt fastens the upper member and the lower member at their ends in a second horizontal direction perpendicular to both the plate thickness direction and the first horizontal direction, the lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which a fastening bolt is fastened; the upper member is rotated from the first mounting position around the axis of the fastening bolt by a predetermined angle toward one of the first and second sole plates to assume a second mounting position; When the upper member is fastened to the lower member in the second mounting position with one of the steel plates sandwiched between them, The lower surface of the upper member abuts against the upper surface of the protruding portion and the upper surface of one of the sole plates, The distance between the inclined upper surface and the lower surface of the upper member is characterized in that the distance on the inside in the first horizontal direction is smaller than the distance on the outside.

[0024] According to this, the insulated steel plate connector clamps one of the inclined upper surfaces of the lower member and the underside of the upper member in the second mounting position. At this time, the upper member in the second mounting position is positioned facing one of the inclined upper surfaces away from the fastening bolt, leaving the upper side of the other inclined upper surface open. Specifically, when the one of the insulated steel plates is clamped between the upper and lower members as described above and the fastening bolt is tightened, the one of the insulated steel plates is clamped between the underside of the upper member and one of the inclined upper surfaces, with the abutment point between the underside of the upper member and the protruding portion serving as a fulcrum. Since the distance between the underside of the upper member and one of the inclined upper surfaces is smaller on the inside than on the outside in the first horizontal direction, the one of the insulated steel plates is ultimately clamped between the underside of the upper member and the inside of the inclined upper surface. In other words, the one of the insulated steel plates is securely clamped near its tip by the upper and lower members. Therefore, the insulated steel plate connector can achieve the same effects as those of the second invention. [Effects of the Invention]

[0025] The steel plate connecting fittings according to the present invention can stably connect steel plates for a long period of time. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a perspective view of a floor iron plate connecting fitting according to an embodiment of the present invention, showing the upper member in a first mounting position. FIG. [Figure 2]FIG. 2 is a longitudinal cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 10 is a perspective view of the iron sheet connecting fitting, showing the upper member in a second mounting position. [Figure 4] FIG. 4 is a longitudinal cross-sectional view taken along line BB in FIG. 3. [Figure 5] FIG. 10 is a vertical cross-sectional view showing a method for temporarily connecting steel plates using the steel plate connecting fittings. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 10 is a vertical cross-sectional view showing a method of connecting iron plates using the iron plate connecting fittings. [Figure 9] FIG. [Figure 10] FIG. 10 is a longitudinal cross-sectional view showing the same connecting method, illustrating a state in which vibration is input to the iron plate. [Figure 11] FIG. 10 is a longitudinal cross-sectional view showing the same connecting method, illustrating a state in which the iron plate is tilted due to its own weight. DETAILED DESCRIPTION OF THE INVENTION

[0027] Below, a steel plate connector 100 according to an embodiment of the present invention will be described with reference to the drawings. In the drawings, identical or corresponding parts will be designated by the same reference numerals, and descriptions will not be repeated. Furthermore, in the following description, terms indicating positions or directions, such as "upper," "lower," "horizontal," and "vertical," may be used. These terms are used for convenience to facilitate understanding of the embodiment, and are not limited to positions or directions when actually implemented.

[0028] [Configuration of the steel plate connecting bracket 100] The configuration of a floor steel plate connecting fitting 100 according to an embodiment of the present invention will be described with reference to Figures 1 and 2 (longitudinal cross-sectional views taken along line AA in Figure 1). As shown in Figures 1 and 2, the floor steel plate connecting fitting 100 comprises an upper member 1, a lower member 3, a plurality of fastening bolts 5, and a plurality of disc spring washers 6. As will be described in more detail below, the upper member 1 can be used by switching between a first mounting position and a second mounting position. Figures 1 and 2 show the floor steel plate connecting fitting 100 with the upper member in the first mounting position.

[0029] When the upper member 1 is in a first mounting position, the insulator sheet connecting fitting 100 connects a first insulator sheet P1 to a second insulator sheet P2 arranged side by side in a first horizontal direction perpendicular to the thickness direction of the first insulator sheet P1.

[0030] The upper member 1 is, for example, a long steel plate, and is arranged above the first steel plate P1 and the second steel plate P2 (hereinafter referred to as the "pair of steel plates P"). The lower member 3 is also, for example, a long steel plate, and is arranged below the pair of steel plates P, facing the upper member 1. In this embodiment, the multiple fastening bolts 5 are, for example, a pair of fastening bolts 5, and the multiple disc spring washers 6 are provided corresponding to the respective fastening bolts 5.

[0031] A pair of inclined lower surfaces 11 are formed on the lower surface of the upper member 1. As shown in FIG. 2 , the pair of inclined lower surfaces 11 are formed so as to slope downward at a downward gradient θ1 with respect to the first horizontal direction from both lower outer edges of a flat portion 23 on the inner side of the upper member 1 toward both outer end portions 15 in a vertical cross-sectional view before fastening. A through hole 21 is provided in the flat portion 23 between the pair of inclined lower surfaces 11. The through hole 21 is formed so as to penetrate the upper member 1 in the plate thickness direction. In this embodiment, the multiple through holes 21 are configured, for example, as a pair of through holes 21. The through hole 21 is provided at a position corresponding to a fastening screw hole 45, which will be described later, when the upper member 1 is in the first mounting posture.

[0032] Hereinafter, the direction perpendicular to both the plate thickness direction and the first horizontal direction will be referred to as a “second horizontal direction.” As shown in Fig. 1, a pair of through holes 21 are provided at both ends of the upper member 1 in the second horizontal direction.

[0033] Recesses 22 recessed in the plate thickness direction are formed around each through hole 21 on the top surface 12 of the upper member 1. After the fastening bolts 5 are tightened, the bolt heads are accommodated in the recesses 22. As a result, after tightening the fastening bolts 5, the fastening bolts 5 do not protrude from the top surface 12 of the upper member 1, preventing damage to the tires and other parts of vehicles traveling on the insole steel plate connecting fittings 100.

[0034] A pair of inclined upper surfaces 31 are formed on the upper surface of the lower member 3. As shown in Fig. 2, the pair of inclined upper surfaces 31 are formed so as to incline upward from both upper outer edges of the flat portion 41 on the inner side of the lower member 3 toward both outer end portions 35.

[0035] In detail, each of the pair of inclined upper surfaces 31 has a pair of first inclined upper surfaces 32 formed on the inside in the first horizontal direction and a pair of second inclined upper surfaces 33 formed on the outside. As shown in Fig. 2, the first inclined upper surfaces 32 are formed so as to be inclined upward at a first angle θ2 with respect to the first horizontal direction from both upper outer edges of the flat portion 41 toward both outer sides. The second inclined upper surfaces 33 are formed so as to be inclined upward at a second angle θ3 with respect to the first horizontal direction from both outer sides of the first inclined upper surfaces toward both outer end portions 35. Here, the second inclined upper surfaces 31 are configured so as to be smaller than the first inclined angle θ2.

[0036] The first inclined upper surface 32 and the second inclined upper surface 33 may be configured, for example, as a single continuously inclined curved surface, in which case the inclination of both outer sides in the first horizontal direction as viewed in the cross section may be smaller than the inclination of the inner side. In this embodiment, each inclined upper surface 31 is configured by two surfaces, the first inclined upper surface 32 and the second inclined upper surface 33, but each inclined upper surface 31 may be configured by three or more surfaces. In that case, each inclined upper surface 31 may be configured so that the inclination as viewed in the cross section decreases toward the outer surface in the first horizontal direction.

[0037] A protruding portion 42 is provided above the flat portion 41 between the pair of inclined upper surfaces 31, protruding upward and extending in the second lateral direction. A plurality of fastening screw holes 45 are formed in the protruding portion 42 to be threadedly engaged with fastening bolts 5 from above. In this embodiment, the plurality of fastening screw holes 45 are configured as, for example, a pair of fastening screw holes 45. The pair of fastening screw holes 45 is provided at both outer end portions of the protruding portion 42 in the second lateral direction. However, the plurality of fastening screw holes 45 may be configured such that at least one of the plurality of fastening screw holes 45 is provided at an end portion of the protruding portion 42 in the second lateral direction.

[0038] As shown in Figure 2, the pair of steel sheets P are arranged with the protruding portion 42 of the lower member 3 sandwiched in the first horizontal direction. The upper member 1 and the lower member 3 in the first mounting position are then arranged with the pair of steel sheets P sandwiched between them. At this time, the steel sheet connecting fittings 100 are arranged so that the outer ends 35 of the inclined upper surface 31 and the outer ends 15 of the inclined lower surface 11 face each other with the pair of steel sheets P in between.

[0039] With the above-described configuration, the fastening bolts 5 are tightened, and the upper member 1 and the lower member 3 are fastened together, sandwiching the pair of steel sheets P in the vertical direction. As a result, the outer ends 35 of the inclined upper surface 31 and the outer ends 15 of the inclined lower surface 11 each sandwich the pair of steel sheets P in the vertical direction.

[0040] The steel plate connecting fitting 100 may be configured to have one each of a plurality of fastening bolts 5, a plurality of fastening screw holes 45, a plurality of cup spring washers 6, and a plurality of through holes 21, or may be configured to have three or more of each.

[0041] Next, with reference to Fig. 3 and Fig. 4 (a longitudinal cross-sectional view taken along line BB in Fig. 3), the floor iron plate connecting fitting 100 when the upper member 1 is in the second mounting position will be described.

[0042] As shown in the figure, the upper member 1 is rotated from the first mounting position around the axis of one of the pair of fastening bolts 5, 5b, toward one of the pair of floor steel plates P (see FIG. 1), for example, a first floor steel plate P1 (an example of one floor steel plate), by, for example, 90° (an example of a predetermined angle), to assume the second mounting position. As will be described in detail later, this positions the first inclined upper surface 32 (hereinafter referred to as "one first inclined upper surface 32b") below the first floor steel plate P1 and both outer end portions 15 of the inclined lower surface 11 opposite each other. With the above configuration, when one of the fastening bolts 5 is tightened, the upper member 1 and the lower member 3 are fastened together with the one floor steel plate P1 sandwiched between them. At this time, the one first inclined upper surface 32b and both outer end portions 15 of the inclined lower surface 11 vertically clamp the one floor steel plate P1. As a result, the floor steel plate connecting fitting 100 temporarily connects the pair of floor steel plates P in the first horizontal direction.

[0043] [Method of connecting the iron plate P with the iron plate connecting fittings 100] Next, with reference to Figures 5 to 8, a method for connecting a pair of floor steel plates P using the floor steel plate connecting fittings 100 will be described. As explained above, the pair of floor steel plates P are connected after being positioned by temporary connection. First, with reference to Figures 5 to 7, a method for temporarily connecting a pair of floor steel plates P will be described, and then with reference to Figures 8 to 11, a method for connecting a pair of floor steel plates P will be described.

[0044] 5, for example, a first steel sheet P1 (an example of one steel sheet) is placed on one of the inclined upper surfaces 31b of the lower member 3. At this time, due to the weight of the one steel sheet P1, the one inclined upper surface 31b on which it is placed rotates in the direction D1 of the one steel sheet P1, and one side of the lower surface 34 of the lower member 3 comes into contact with the ground.

[0045] Although not shown, the lower surface 34 of the lower member 3 may be formed so as to be inclined from both lower outer edges of the flat portion 45 toward both outer end portions 35 at an angle substantially equal to the first angle θ2 (see FIG. 2) of the first inclined upper surface 32 in the cross-sectional view. In other words, the lower surface 34 of the lower member 3 may be configured so as to be substantially parallel to the first inclined upper surface 32. As a result, in the state shown in FIG. 5, one of the first inclined upper surfaces 32 becomes substantially parallel to the ground, allowing one of the steel plates P1 to be stably placed on one of the first inclined upper surfaces 32.

[0046] Furthermore, both side surfaces 44, 44 of the protrusion 42 in the first horizontal direction may be formed to extend in the second horizontal direction, in a direction intersecting the first inclined upper surface 32. As shown in the figure, the end of the steel plate P is generally formed so that the side surface Ps is perpendicular to the upper and lower surfaces Pu, Pb. By configuring both side surfaces 44, 44 of the protrusion 42 as described above, in the state shown in Figure 5, the side surface 44 of the protrusion 42 and the side surface Ps of the steel plate P can be arranged approximately parallel, which prevents the side surface Ps of the steel plate P from unintentionally coming into contact with the side surface 44 of the protrusion 42 before one of the steel plates P1 has been fully received inside the steel plate connecting fitting 100.

[0047] Next, as shown in Fig. 6, the upper member 1 is placed in the second mounting position described above so as to face one of the inclined upper surfaces 31b. Then, the upper member 1 is placed so that one of the fastening bolts 5b (see Fig. 3) passes through one of the pair of through holes 21b and is screwed into one of the fastening screw holes 45b, and the other through hole 21c is positioned above one of the insole steel plates P1.

[0048] As shown in the figure, the height L1 of the protrusion 42 relative to the first inclined upper surface 32 is configured to be the same as or approximately the same as the thickness L2 of the steel sheet P. As a result, during the process of tightening one of the fastening bolts 5b, the periphery of the through hole 21 in the inclined lower surface 11 and the upper surface 43 of the protrusion 42 abut at the portion indicated by reference symbol C1. At this time, the bolt head of one of the fastening bolts 5b abuts against the upper surface of the recess 22 in the upper member 1 at the portion indicated by reference symbol C2. Then, both outer end portions 15 of the inclined lower surface 11 abut against the upper surface Pu of one of the steel sheets P1. In other words, the abutment portion C1 between the inclined lower surface 11 and the protrusion 42 serves as a fulcrum, and one of the steel sheets P1 is sandwiched between both outer end portions 15 of the inclined lower surface 11 and the inclined upper surface 31.

[0049] As one of the fastening bolts 5b is further tightened, a downward acting force F1 is applied from the one of the fastening bolts 5b to the abutting portion C2. At this time, as shown in Figure 2, because the second angle θ3 of the second inclined upper surface 33 is set smaller than the first angle θ2 of the first inclined upper surface 32 of the lower member 3 in the cross-sectional view, the distance between the first inclined upper surface 32 and the inclined lower surface 11 becomes smaller than the distance between the second inclined upper surface 33 and the inclined lower surface 11. Therefore, one of the inclined sheet metal plates P1 is finally sandwiched between both outer end portions 15 of the inclined lower surface 11 and the first inclined upper surface 32, and acting forces F2 and F3 are applied to one of the inclined sheet metal plates P1 from portions C3 and C4 (clamping portions) sandwiched between the upper and lower members 1 and 3, respectively. At this time, one of the steel sheets P1 is clamped near the tip of the steel sheet P by the upper and lower members 1 and 3, and acting forces F2 and F3 are applied to the upper and lower surfaces Pu and Pb of the one of the steel sheets P1 at positions that are approximately symmetrical with respect to the first horizontal direction. Therefore, the upper and lower members 1 and 3 are effectively fastened together by clamping the one of the steel sheets P1.

[0050] As shown by the imaginary lines in the figure, one of the steel plates P1 may move in the direction of the arrow D2 due to its own weight. Even if the steel plate moves in this way, the steel plate connecting fitting 100, being configured as described above, can reliably clamp the vicinity of the tip of the steel plate P between both outer ends 15 of the inclined lower surface 11 and the inclined upper surface 31, as shown in the figure.

[0051] 7, the other steel sheet P2 is placed on the other inclined upper surface 31c and positioned relative to the one steel sheet P1. The upper member 1 in the second mounting position is positioned facing the one inclined upper surface 31b from the fastening bolt 5, so the top of the other inclined upper surface 31c is open. Therefore, while the steel sheet connecting fitting 100 holds the one steel sheet P1 between its edges, the other steel sheet P2 can be placed on the other inclined upper surface 31c.

[0052] Once the positioning of the steel plates P is complete, one of the fastening bolts 5b is loosened and the fastening is temporarily released, as shown in Figure 8. At this time, the lower member 3 rotates in the direction D3 of the other steel plate P2 due to the weight of the steel plate P, and the lower member 3 comes into contact with each of the pair of steel plates P at both outer ends 35 of the inclined upper surface 31.

[0053] 9, the upper member 1 is placed in the first mounting position, and the pair of fastening bolts 5 are passed through the pair of through holes 21, respectively, and screwed into the pair of fastening screw holes 45 to be tightened. As a result, the pair of iron sheets P are sandwiched between the outer end portions 35 of the inclined upper surface 31 and the outer end portions 15 of the inclined lower surface 11, and acting forces F4 and F5 are applied to each of the pair of iron sheets P from portions C5 and C6 (sandwiching portions) sandwiched between the upper and lower members 1 and 3, respectively.

[0054] At this time, the distance between the inclined upper surface 31 and the inclined lower surface 11 decreases from the fastening bolt 5 toward both outer ends 35, 15 in the first horizontal direction. That is, because the clamping portions C5, C6 of the inclined upper surface 31 and the inclined lower surface 11 are located opposite each other, acting forces F4, F5 are applied to the upper and lower surfaces Pu, Pb of the sole plate P at positions that are approximately symmetrical with respect to the first horizontal direction. This allows the upper and lower members 1, 3 to be effectively fastened together with the pair of sole plates P sandwiched between them.

[0055] The upper member 1 has a pair of inclined lower surfaces 11, forming a V-shape in cross section, and the lower member 3 has a pair of inclined upper surfaces 31, forming an inverted V-shape in cross section, with the pair of sheet metal plates P sandwiched between their outer ends 15, 35. Therefore, predetermined spaces 17, 37 are formed between the upper member 1 and the upper surface Pu of the sheet metal plate P, and between the lower member 3 and the lower surface Pc of the sheet metal plate P, respectively. As shown by the imaginary lines in Figure 9, the upper and lower members 1, 3 can elastically deform within the predetermined spaces 17, 37 while sandwiching the pair of sheet metal plates P between their outer ends 15, 35. Furthermore, the disc spring washer 6 also elastically deforms when the fastening bolt 5 is tightened. This increases the frictional force at the bolt head bearing surface of the fastening bolt 5, making the fastening bolt 5 less likely to loosen.

[0056] 10, by forming the predetermined spaces 17, 37, when the above-described vertical vibration D4 is input to the pair of sole plates P, the leading ends of the sole plates P can move vertically within the predetermined spaces 17, 37, with the clamping parts C5, C6 as the fulcrum, as shown by the imaginary lines in the figure (arrow D5). In other words, the vertical vibration input given to the sole plates P is converted into vertical movement of the leading ends of the sole plates P supported by the clamping parts C5, C6. This suppresses deformation of the upper and lower members 1, 3 due to the vibration input, and stable acting forces F4, F5 are applied to the sole plates P from the upper and lower members 1, 3.

[0057] Furthermore, as explained above, the pair of steel plates P are sandwiched from above and below by the upper and lower members 1 and 3, which have been elastically deformed in advance. Therefore, even if the above-mentioned vertical vibration D4 is input to the upper and lower members 1 and 3, the acting forces F4 and F5 required to sandwich the steel plates P are unlikely to be released, and the pair of steel plates P can continue to be stably sandwiched between the upper and lower members 1 and 3.

[0058] Although not shown, each of the pair of inclined lower surfaces 11 may be configured to incline downward from both lower outer edges of the flat portion 23 toward both outer ends 15 at an angle equal to the second angle θ3 (see FIG. 2) with respect to the first horizontal direction in the cross-sectional view. This allows the insole steel plate connecting fitting 100 to ensure that the volumes of the predetermined spaces 17, 37 formed between the upper and lower surfaces Pu, Pb of the insole steel plate P and the upper and lower members 1, 3 are approximately the same. Therefore, the insole steel plate connecting fitting 100 can be configured to fully allow the movement of the tip of the insole steel plate P as described above, and to fully tolerate the elastic deformation of the upper and lower members 1, 3.

[0059] As shown in FIG. 11 , the distance L3 between the outer ends 15 of the upper member 1 in the first horizontal direction may be wider than the distance L4 between the outer ends 35 of the lower member 3 in the first horizontal direction. As shown, each of the pair of steel plates P may be positioned with a slight downward inclination when viewed from the inside to the outside of the steel plate connector 100 due to the weight of the steel plate P. Therefore, the surface normal C of the steel plate P is slightly tilted upward and outward. The steel plate connector 100 is configured so that the distance between the outer ends 15 of the upper member 1 is wider than the width of the outer ends 35 of the lower member 3. This allows the force F4 acting from the clamping portion C5 on the upper surface Pu of the steel plate P to act from a more outer side than the force F5 acting from the clamping portion C6 on the lower surface Pb. This allows the steel plate connector 100 to clamp the steel plate P from above and below on approximately the same surface normal C of the steel plate P.

[0060] As described above, when the insole steel plate connecting fitting 100 is used with the upper member 1 in the second mounting position, it can fasten the upper and lower members 1 and 3 by sandwiching only the first insole steel plate P1 (one of the insole steel plates). Then, with the first insole steel plate P1 sandwiched and fastened, the second insole steel plate P2 (the other insole steel plate) can be placed on the other inclined upper surface 31c. This allows the insole steel plate connecting fitting 100 to temporarily connect a pair of insole steel plates P to position them prior to connecting them. At this time, the first insole steel plate P1 is clamped between the upper and lower members 1 and 3 near its tip. Therefore, by clamping the first insole steel plate P1 at approximately the same position on the upper and lower surfaces Pu and Pb, the upper and lower members 1 and 3 are effectively fastened by sandwiching the insole steel plate P. This allows the insole steel plate connecting fitting 100 to accurately position the pair of insole steel plates P. As a result, the iron plate connector 100 can effectively connect the iron plates P together.

[0061] After the pair of sheet steel plates P are positioned, the sheet steel plate connecting fitting 100 is used by switching the upper member 1 to the first mounting position. This fastens the upper and lower members 1 and 3 to the pair of sheet steel plates P at approximately the same positions on the upper and lower surfaces Pu and Pb of the pair of sheet steel plates P. Therefore, the pair of sheet steel plates P are effectively fastened by the upper and lower members 1 and 3. Furthermore, the sheet steel plate connecting fitting 100 forms predetermined spaces 17 and 37 between the upper and lower members 1 and 3 and the upper and lower surfaces Pu and Pb of the pair of sheet steel plates P, respectively. This converts external vibration input into movement of the end of the sheet steel plate P within the predetermined spaces 17 and 37. This suppresses deformation of the upper and lower members due to vibration input. Furthermore, the upper and lower members elastically deform within the predetermined spaces and are sandwiched between the upper and lower members from above and below. This allows the sheet steel plate P to continue to be stably sandwiched even when vibration input is applied. This suppresses a decrease in the axial force of the fastening bolt 5, thereby suppressing loosening of the fastening bolt 5. As a result, the iron plate connector 100 can stably connect iron plates P over a long period of time.

[0062] Although not shown, the insulated steel plate fastener 100 described above is configured to have both an inclined upper surface 31 and an inclined lower surface 11. However, the insulated steel plate fastener 100 may be configured to have only an inclined lower surface 11 without the inclined upper surface 31. Even in this case, a predetermined space 17 is formed between the upper member 1 and the upper surfaces Pu of the pair of insulated steel plates P of the insulated steel plate connecting fitting 100. As a result, when vertical vibration is input to the pair of insulated steel plates P, the ends of each insulated steel plate P can move upward within the predetermined space 17, with the portions C5 where the upper member 1 clamps the pair of insulated steel plates P as fulcrums. The pair of insulated steel plates P are also clamped vertically between both outer ends 15 of the upper member 1 and the lower member 3. In other words, the pair of insulated steel plates P are clamped between the upper and lower members 1 and 3 at positions on the upper and lower surfaces Pu and Pb that are approximately symmetrical with respect to the first horizontal direction. Furthermore, by forming the predetermined space 17 as described above, the upper member 1 can elastically deform within the predetermined space 17 while clamping each of the sole steel plates P at both outer end portions 15. In other words, the pair of sole steel plates P are clamped from above by the upper member 1, which has already been elastically deformed. Therefore, in the sole steel plate fastening fitting 100, a decrease in the axial force of the fastening bolt 5 is suppressed in the same manner as described above, and the resulting loosening of the fastening bolt 5 is suppressed.

[0063] Also, although not shown, the sheet metal fastener 100 may be configured to have only the inclined upper surface 31 without the inclined lower surface 11. Even in this case, a predetermined space 37 is formed between the lower member 3 and the lower surfaces Pb of the pair of sheet metal plates P in the sheet metal fastener 100. This allows the ends of each sheet metal plate P to move downward within the predetermined space 37, with the portion C6 where the lower member 3 clamps the pair of sheet metal plates as a fulcrum, when vertical vibration is input to the pair of sheet metal plates P. The pair of sheet metal plates P are also clamped vertically between the outer ends 35 of the upper member 1 and the lower member 3. In other words, the pair of sheet metal plates P are clamped between the upper and lower members 1 and 3 at positions approximately symmetrical with respect to the first horizontal direction on the upper and lower surfaces Pu, Pb. Furthermore, by forming the predetermined space 37 as described above, the lower member 3 can elastically deform within the predetermined space 37 while clamping each sheet metal plate P at its outer ends 35. In other words, the pair of insole steel plates P are clamped from both sides by the lower member 3, which has been elastically deformed in advance. Therefore, in the insole steel plate fastening fitting 100, the reduction in axial force of the fastening bolt 5 is suppressed in the same manner as described above, and the resulting loosening of the fastening bolt 5 is suppressed.

[0064] Even if the inclined lower surface 11 is not provided, the inclined upper surface 31 of the lower member 3 and the lower surface of the upper member 1 in the second mounting position sandwich the inclined upper surface 31b of the inclined upper surface P1 of the lower member 3. Specifically, when the inclined upper surface 31b of the inclined upper surface P1 is clamped between the upper and lower members 1 and 3 as described above and the fastening bolt 5 is tightened, the inclined upper surface 31b of the inclined upper surface P1 is clamped between the lower surface of the upper member 1 and the first inclined upper surface 32b of the inclined upper surface 32b of the upper member 1, with the abutment point C1 between the lower surface of the upper member 1 and the protrusion 42 serving as a fulcrum. Finally, as described above, the inclined upper surface 31b of the inclined upper surface P1 of the upper member 1 is clamped between the lower surface of the upper member 1 and the first inclined upper surface 32b of the inclined upper surface 32b of the upper member 1. In other words, the inclined upper surface 31b of the inclined upper surface P1 of the inclined upper surface 32b ...

[0065] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments and can be embodied in various forms without departing from the spirit and scope of the present invention. The drawings mainly show each component in a schematic manner for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. Furthermore, the materials, shapes, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible within a scope that does not substantially deviate from the configuration of the present invention. [Explanation of symbols]

[0066] P Iron plate θ1 Downward gradient θ2 1st angle θ3 2nd angle 1 Upper member 11 Slanted bottom surface 15 Outer end of inclined lower surface 21 Through hole 22 recess 3 Lower member 31 Slanted top surface 32 1st slope top surface 33 2nd slope top surface 35 Outer end of inclined upper surface 42 Protrusion 44 Side of protrusion 45 Fastening screw holes 5 Fastening bolts 100 Steel plate connecting fittings

Claims

1. A metal fitting for connecting a first steel sheet and a second steel sheet arranged side by side in a first horizontal direction perpendicular to the thickness direction of the first steel sheet, a lower member disposed below the first and second steel plates; an upper member disposed over the first and second sole plates; a fastening bolt for fastening the upper member and the lower member together with the first and second sole plates sandwiched therebetween; Equipped with the upper member can be fastened to the lower member by switching between a first mounting position and a second mounting position; The fastening bolt is disposed between an end of the first steel plate and an end of the second steel plate, the lower member has a pair of inclined upper surfaces that incline upward from the fastening bolt toward both outer ends in the first horizontal direction in a vertical cross-sectional view before being fastened; the upper member has a pair of inclined lower surfaces that incline downward from the fastening bolt toward both outer ends in the first horizontal direction in the cross-sectional view, A steel sheet connecting fitting characterized in that when the upper member is fastened to the lower member in a first mounting position, the distance between the inclined upper surface and the inclined lower surface decreases as the distance from the fastening bolt increases toward both outer ends in the first horizontal direction.

2. The inclination of the inclined upper surface on both outer sides in the first horizontal direction as viewed in the cross section is smaller than the inclination of the inner side, The fastening bolt fastens the upper member and the lower member at their ends in a second horizontal direction perpendicular to both the plate thickness direction and the first horizontal direction, the lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which a fastening bolt is fastened; the upper member is rotated from the first mounting position around the axis of the fastening bolt by a predetermined angle toward one of the first and second sole plates to assume a second mounting position; When the upper member is fastened to the lower member in the second mounting position with one of the steel plates sandwiched between them, The inclined lower surface abuts against the upper surface of the protrusion and the upper surface of one of the sole plates, 2. The metal fitting for connecting floor iron plates according to claim 1, wherein the distance between the inclined upper surface and the inclined lower surface is smaller on the inside than on the outside in the first horizontal direction.

3. the inclined upper surface has an inner first inclined upper surface and an outer second inclined upper surface in the first lateral direction; the first inclined upper surface is inclined upward at a first angle from the fastening bolt toward both outer sides in the first horizontal direction in the cross-sectional view; the second inclined upper surface is inclined upward from both outer sides of the first inclined upper surface toward both outer ends in the first horizontal direction at a second angle smaller than the first angle in the cross-sectional view; 3. The steel plate connecting fitting according to claim 2, characterized in that when the upper member is fastened to the lower member in the second mounting position with one steel plate sandwiched therebetween, the distance between the first inclined upper surface and the inclined lower surface is smaller than the distance between the second inclined upper surface and the inclined lower surface.

4. 2. The metal fitting for connecting floor steel plates according to claim 1, wherein the inclined lower surface is inclined downward at an inclination equal to that of the inclined upper surface in the cross-sectional view.

5. 4. The metal fitting for connecting floor iron plates according to claim 3, wherein the inclined lower surface is inclined downward at an angle equal to the second angle in the cross-sectional view.

6. 6. The steel plate connecting fitting according to claim 1, wherein the distance between the two outer ends of the inclined lower surface in the first horizontal direction is wider than the distance between the two outer ends of the inclined upper surface in the first horizontal direction.

7. 6. The iron plate connecting fitting according to claim 3 or claim 5, wherein both side surfaces of the protrusion in the first horizontal direction are formed to extend in the second horizontal direction in a direction perpendicular to the first inclined upper surface.

8. A metal fitting for connecting a first steel sheet and a second steel sheet arranged side by side in a first horizontal direction perpendicular to the thickness direction of the first steel sheet, a lower member disposed below the first and second steel plates; an upper member disposed over the first and second sole plates; a fastening bolt for fastening the upper member and the lower member together with the first and second sole plates sandwiched therebetween; Equipped with the upper member can be fastened to the lower member by switching between a first mounting position and a second mounting position; The fastening bolt is disposed between an end of the first steel plate and an end of the second steel plate, the lower member has a pair of inclined upper surfaces that incline upward from the fastening bolt toward both outer ends in the first horizontal direction in a vertical cross-sectional view before being fastened; A steel plate connecting fitting characterized in that when the upper member is fastened to the lower member, the distance between the inclined upper surface and the lower surface of the upper member decreases as it moves from the fastening bolt toward both outer ends in the first horizontal direction.

9. A metal fitting for connecting a first steel sheet and a second steel sheet arranged side by side in a first horizontal direction perpendicular to the thickness direction of the first steel sheet, a lower member disposed below the first and second steel plates; an upper member disposed over the first and second sole plates; a fastening bolt for fastening the upper member and the lower member together with the first and second sole plates sandwiched therebetween; Equipped with The fastening bolt is disposed between an end of the first steel plate and an end of the second steel plate, the upper member has a pair of inclined lower surfaces that incline downward from the fastening bolt toward both outer ends in the first horizontal direction in a vertical cross-sectional view before being fastened; A steel plate connecting fitting characterized in that when the upper member is fastened to the lower member, the distance between the inclined lower surface and the upper surface of the lower member decreases as it moves from the fastening bolt toward both outer ends in the first horizontal direction.

10. The inclination of the inclined upper surface on both outer sides in the first horizontal direction as viewed in the cross section is smaller than the inclination of the inner side, The fastening bolt fastens the upper member and the lower member at their ends in a second horizontal direction perpendicular to both the plate thickness direction and the first horizontal direction, the lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which a fastening bolt is fastened; the upper member is rotated from the first mounting position around the axis of the fastening bolt by a predetermined angle toward one of the first and second sole plates to assume a second mounting position; When the upper member is fastened to the lower member in the second mounting position with one of the steel plates sandwiched between them, The lower surface of the upper member abuts against the upper surface of the protruding portion and the upper surface of one of the sole plates, 9. The metal fitting for connecting floor iron plates according to claim 8, wherein the distance between the inclined upper surface and the lower surface of the upper member is smaller on the inside than on the outside in the first horizontal direction.

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