Iron plate connecting fitting

Abstract

Provided is a connecting fitting for floor iron plates that can stably connect floor iron plates over a long period of time. 【Solution means】The floor iron plate connecting fitting 100 includes an upper member 1, a lower member 3, and a fastening bolt 5 that fastens the upper member 1 and the lower member 3, and connects a pair of floor iron plates P arranged in a first lateral direction. The upper member 1 has an inclined lower surface 11 that inclines 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 that inclines upward from the fastening bolt 5 toward both outer sides 35 in the first lateral direction in the same sectional view. When the upper member 1 is fastened to the lower member 3 in a first mounting posture, the distance between the inclined upper surface 11 and the inclined lower surface 31 decreases toward both outer end portions 15, 35 in the first lateral direction from the fastening bolt 5.

Description

Technical Field

[0001] The present invention relates to a connecting fitting for paving iron plates.

Background Art

[0002] In construction and civil engineering work sites, paving iron plates are spread on muddy soil to ensure the passability of construction vehicles, workers, etc. on the soil. At this time, in order to eliminate the steps and displacements between adjacent paving iron plates, it is preferable that the paving iron plates are connected to each other. Conventionally, they have been connected by partial welding with small iron pieces. However, the method by welding has problems such as the fact that the welding work is time-consuming, and when a part of the welding peels off, the small iron pieces are partially rolled up and damage the tires of the vehicle. In contrast, for example, a connecting fitting for paving iron plates for connecting paving iron plates as described in Patent Document 1 has been proposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The iron plate connecting fitting described in Patent Document 1 sandwiches a pair of iron plates from above and below with a pair of members, and firmly clamps them in the vertical direction with bolts. As a result, the upper and lower members sandwich and fasten the pair of iron plates, and the iron plates are connected. Here, at the work site, as the vehicle repeatedly passes over the iron plate, a large load of vertical vibration is repeatedly applied to the iron plate connecting fitting via the iron plate. In the iron plate connecting fitting described in Patent Document 1, the upper and lower members are fastened by sandwiching the iron plate by the bolt axial force generated by tightening the bolt. However, in the iron plate connecting fitting described in Patent Document 1, when a large load of vibration is applied, the axial force of the bolt fluctuates due to the iron plate moving between the sandwiched upper and lower members, etc., and the bolt loosens slightly. As this is repeated over a long period, the axial force of the bolt decreases, and as a result, the bolt may loosen. In that case, the upper and lower members may not be able to hold the fastening with the iron plate sandwiched, and the connection of the iron plate may be released.

[0005] Furthermore, in the iron plate connecting fitting described in Patent Document 1, in order to effectively fasten the upper and lower members by sandwiching a pair of iron plates, it is necessary to adjust in advance the relative positional relationship between the lower member and the pair of iron plates. However, in the iron plate connecting fitting described in Patent Document 1, after positioning the lower member with respect to one iron plate and then positioning it with respect to the other iron plate, since the lower member can move freely, it is difficult to accurately position the relative position of the lower member with respect to both iron plates. If the accurate positioning is not performed, the pair of iron plates may not be effectively connected, and there is a risk that the connection of the iron plate will be released due to long-term use. That is, the iron plate connecting fitting described in Patent Document 1 has a problem that it is difficult to stably connect the iron plates over a long period.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide an iron plate connecting fitting capable of stably connecting iron plates over a long period.

Means for Solving the Problems

[0007] According to one aspect of the present invention, a floor iron plate connecting fitting is a floor iron plate connecting fitting for connecting a first floor iron plate and a second floor iron plate arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first floor iron plate, a lower member disposed below the first and second floor iron plates, an upper member disposed above the first and second floor iron plates, a fastening bolt for fastening the upper member and the lower member with the first and second floor iron plates sandwiched therebetween, and is provided with the upper member can be switched between a first mounting posture and a second mounting posture and fastened to the lower member, the fastening bolt is disposed sandwiched between the end of the first floor iron plate and the end of the second floor iron plate, the lower member has a pair of inclined upper surfaces that incline upward toward both outer ends in the first lateral direction from the fastening bolt in a longitudinal sectional view in a state before being fastened, the upper member has a pair of inclined lower surfaces that incline downward toward both outer ends in the first lateral direction from the fastening bolt in the sectional view, when the upper member is fastened to the lower member in the first mounting posture, the distance between the inclined upper surface and the inclined lower surface decreases toward both outer ends in the first lateral direction from the fastening bolt.

[0008] According to this, in the floor iron plate connecting fitting, the first and second floor iron plates (hereinafter referred to as "a pair of floor iron plates") are sandwiched between an inverted V-shaped inclined lower surface as viewed in the cross-sectional view and an inverted V-shaped inclined upper surface as viewed in the same cross-sectional view, so that a predetermined space is formed between the upper and lower members and the upper and lower surfaces of the pair of floor iron plates, respectively. Further, the pair of floor iron plates are sandwiched in the vertical direction at both outer end portions of the upper and lower members. That is, the pair of floor iron plates are sandwiched between the upper and lower members at positions that are substantially symmetric with respect to the first lateral direction on the upper and lower surfaces. Thereby, the upper and lower members are effectively fastened with the pair of floor iron plates interposed therebetween. Also, when vertical vibrations as described above are input to the pair of floor iron plates, with the portions where the upper and lower members sandwich the pair of floor iron plates as fulcrums, the ends of the respective floor iron plates can move vertically within the predetermined space. That is, the vibration input applied to the pair of floor iron plates is converted into the movement of the ends of the respective floor iron plates. Thereby, deformation of the upper and lower members due to the vibration input is suppressed, and a decrease in the axial force of the fastening bolt is suppressed. Furthermore, since the predetermined space is formed as described above, the upper and lower members can elastically deform within the predetermined space while sandwiching the respective floor iron plates at both outer end portions. That is, the pair of floor iron plates are sandwiched from the vertical direction by the upper and lower members that are elastically deformed in advance. Therefore, even when vertical vibrations as described above are input to the upper and lower members, the acting force required for sandwiching the floor iron plates is difficult to escape, so that the pair of floor iron plates can be stably sandwiched by the upper and lower members continuously. As described above, the floor iron plate connecting fitting effectively fastens the upper and lower members with the pair of floor iron plates interposed therebetween, and is stably sandwiched continuously even when there is vibration input from the outside, so that a decrease in the axial force of the fastening bolt is suppressed, and thus loosening of the bolt caused thereby is suppressed.

[0009] In the floor iron plate connecting fitting according to the second invention, the inclined upper surface has a smaller inclination on both outer sides in the first lateral direction as viewed in the cross-sectional view than the inclination on the inner side. The fastening bolt fastens the upper member and the lower member at an end portion in a second lateral direction that is orthogonal to both the plate thickness direction and the first lateral direction. The lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which the fastening bolt is fastened. The upper member is rotated by a predetermined angle in the direction of one of the first and second backing plates about the axis of the fastening bolt from the first mounting posture to the second mounting posture. When the upper member is fastened to the lower member in the second mounting posture with one of the backing plates sandwiched therebetween, the inclined lower surface abuts against the upper surface of the protruding portion and the upper surface of one of the backing plates, and the distance between the inclined upper surface and the inclined lower surface is smaller on the inner side than on the outer side in the first lateral direction.

[0010] According to this, the backing plate connecting fitting sandwiches one of the backing plates between one side of the inclined upper surface of the lower member and both outer end portions of the upper member in the second mounting posture. That is, the backing plate connecting fitting is used with the upper member in the second mounting posture to fasten the upper and lower members by sandwiching only one of the backing plates. At this time, the upper member in the second mounting posture is arranged facing one of the inclined upper surfaces from the fastening bolt, so the upper part of the other inclined upper surface is open. Therefore, the backing plate connecting fitting can place the other backing plate on the other inclined upper surface while sandwiching one of the backing plates. Thereby, the backing plate connecting fitting can temporarily connect and position the pair of backing plates prior to connecting the pair of backing plates. Specifically, when one of the backing plates is sandwiched between the upper and lower members and the fastening bolt is tightened as described above, with the contact portion between the inclined lower surface and the protruding portion as a fulcrum, one of the backing plates is sandwiched between the inclined lower surface and one of the inclined upper surfaces. At this time, since the distance between the inclined lower surface and one of the inclined upper surfaces is smaller on the inner side than on the outer side in the first lateral direction, one of the backing plates is finally sandwiched between both outer end portions of the inclined lower surface and the inner side of the inclined upper surface. That is, one of the backing plates is securely sandwiched near the tip of the backing plate by the upper and lower members. Thereby, the pair of backing plates are sandwiched at positions substantially symmetric with respect to the first lateral direction near the tip of the backing plate, and the upper and lower members are effectively fastened with the backing plate sandwiched therebetween. As a result, the backing plate connecting fitting can accurately perform positioning for connecting the pair of backing plates by being able to efficiently temporarily connect the backing plates.

[0011] The iron plate connecting fitting according to the third invention has an inclined upper surface having an inner first inclined upper surface and an outer second inclined upper surface in a 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 lateral 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 lateral direction in the cross-sectional view. When the upper member is fastened to the lower member in a second mounting posture with one iron 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.

[0012] According to these, when one iron plate is sandwiched between the inclined lower surface and the inclined upper surface with the contact portion between the inclined lower surface and the protruding portion as a fulcrum, 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 one iron plate is finally sandwiched between both outer ends of the inclined lower surface and the first inclined upper surface. That is, one iron plate is surely sandwiched near the tip of the iron plate by the upper and lower members. Therefore, the iron plate connecting fitting can achieve the same effect as the second invention with a simple configuration.

[0013] The iron plate connecting fitting according to the fourth invention has an inclined lower surface that is inclined downward at the same inclination as the inclined upper surface in the cross-sectional view.

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

[0015] According to these, the floor iron plate connecting fitting can ensure that the volumes of the respective predetermined spaces formed between the upper and lower surfaces of the pair of floor iron plates and the upper and lower members are approximately the same. Therefore, when the vibration input as described above is applied to the floor iron plate, the tip of the floor iron plate can move sufficiently in the vertical direction, and the elastic deformation of the upper and lower members can be sufficiently allowed. Thus, the floor iron plate connecting fitting can surely achieve the same effect as that of the first invention.

[0016] In the floor iron plate connecting fitting according to the sixth invention, the distance between both outer ends in the first lateral direction of the inclined lower surface is wider than the distance between both outer ends in the first lateral direction of the inclined upper surface.

[0017] Each of the pair of floor iron plates may be arranged to be slightly inclined downward toward both outer ends in the first lateral direction from the fastening bolt due to the self-weight of the floor iron plate. At this time, the normal direction of the surface of each floor iron plate is slightly inclined upward and outward. By being configured as described above, the sixth invention can be configured such that the acting force on the upper surface of each floor iron plate acts from the outside rather than the acting force on the lower surface. Thereby, the floor iron plate connecting fitting can be configured such that the floor iron plates are clamped vertically on substantially the same normal line of each floor iron plate. As a result, the upper and lower members can be effectively fastened with the pair of floor iron plates interposed therebetween.

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

[0019] The end of the floor iron plate is generally formed such that its side surface is substantially perpendicular to the upper and lower surfaces. As described above, when temporarily connecting a pair of floor iron plates, one floor iron plate abuts against and is clamped by the first inclined upper surface. At this time, due to the both side surfaces of the protruding portion being configured as described above, the side surface of the protruding portion and the side surface of the floor iron plate are arranged to be substantially parallel. Therefore, it is possible to prevent the side surface of the floor iron plate from unintentionally contacting the side surface of the protruding portion before sufficiently receiving one floor iron plate inside the floor iron plate connecting fitting. As a result, the floor iron plate connecting fitting can effectively temporarily connect a pair of floor iron plates by being able to reliably clamp the vicinity of the tip of the floor iron plate between the first inclined upper surface and the inclined lower surface.

[0020] The floor iron plate connecting fitting according to the eighth aspect of the present invention is a floor iron plate connecting fitting for connecting a first floor iron plate and a second floor iron plate arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first floor iron plate, a lower member disposed below the first and second floor iron plates, an upper member disposed above the first and second floor iron plates, a fastening bolt for fastening the upper member and the lower member with the first and second floor iron plates sandwiched therebetween, and is provided with the upper member can be switched between a first mounting posture and a second mounting posture and fastened to the lower member, the fastening bolt is disposed sandwiched between the end of the first floor iron plate and the end of the second floor iron plate, the lower member has a pair of inclined upper surfaces that incline upward toward both outer ends in the first lateral direction from the fastening bolt in a longitudinal sectional view in a state 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 toward both outer ends in the first lateral direction from the fastening bolt.

[0021] The floor iron plate connecting fitting according to the ninth aspect of the present invention is a floor iron plate connecting fitting for connecting a first floor iron plate and a second floor iron plate arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first floor iron plate, a lower member disposed below the first and second floor iron plates, An upper member disposed above the first and second floor iron plates, A fastening bolt for fastening the upper member and the lower member with the first and second floor iron plates sandwiched therebetween, Comprising, The fastening bolt is disposed sandwiched between the end of the first floor iron plate and the end of the second floor iron plate, The upper member has a pair of inclined lower surfaces that incline downward toward both outer ends in the first lateral direction from the fastening bolt in a longitudinal sectional view in a state 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 toward both outer ends in the first lateral direction from the fastening bolt.

[0022] According to these, in the floor iron plate connecting fitting, a predetermined space is formed between the upper member or the lower member and the upper or lower surface of the pair of floor iron plates. Thus, when vertical vibration is input to the pair of floor iron plates, with the portions where the upper member or the lower member sandwich the pair of floor iron plates as fulcrums, the ends of the respective floor iron plates can move upward or downward within the predetermined space. Also, the pair of floor iron plates are clamped in the vertical direction by both outer ends of the upper member and the lower member, or by the upper member and both outer ends of the lower member. That is, the pair of floor iron plates are clamped by the upper and lower members at positions that are substantially symmetric with respect to the first lateral direction on the upper and lower surfaces. Further, due to the formation of the predetermined space as described above, the upper member or the lower member can elastically deform within the predetermined space while clamping the respective floor iron plates at both outer ends. That is, the pair of floor iron plates are clamped from above or below by the upper member or the lower member that is elastically deformed in advance. Therefore, the floor iron plate connecting fitting can achieve the same effects as those of the first invention.

[0023] The floor iron plate connecting fitting according to the tenth invention is the floor iron plate connecting fitting according to the eighth invention, wherein the inclined upper surface has a smaller inclination on both outer sides in the first lateral direction in the sectional view than the inclination on the inner side, The fastening bolt fastens the upper member and the lower member at an end in a second lateral direction that is orthogonal to both the plate thickness direction and the first lateral direction, The lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which the fastening bolt is fastened. The upper member is rotated by a predetermined angle from the first mounting posture in the direction of one of the first and second furring boards around the axis of the fastening bolt to become the second mounting posture. When the upper member is fastened to the lower member in the second mounting posture with one of the furring boards sandwiched therebetween, the lower surface of the upper member abuts on the upper surface of the protruding portion and the upper surface of one of the furring boards, and the distance between the inclined upper surface and the lower surface of the upper member is smaller on the inner side than on the outer side in the first lateral direction.

[0024] According to this, in the furring board connecting fitting, one of the inclined upper surfaces of the lower member and the lower surface of the upper member in the second mounting posture sandwich one of the furring boards. At this time, since the upper member in the second mounting posture is arranged facing one of the inclined upper surfaces from the fastening bolt, the upper part above the other inclined upper surface is open. Specifically, when one of the furring boards is sandwiched between the upper and lower members as described above and the fastening bolt is tightened, with the contact portion between the lower surface of the upper member and the protruding portion as a fulcrum, one of the furring boards is sandwiched between the lower surface of the upper member and one of the inclined upper surfaces. At this time, since the distance between the lower surface of the upper member and one of the inclined upper surfaces is smaller on the inner side than on the outer side in the first lateral direction, one of the furring boards is finally sandwiched between the lower surface of the upper member and the inner side of the inclined upper surface. That is, one of the furring boards is securely sandwiched near the tip of the furring board by the upper and lower members. Therefore, the furring board connecting fitting can achieve the same effect as the effect of the second invention.

Advantages of the Invention

[0025] According to the furring board connecting fitting according to the present invention, the furring board can be stably connected for a long period of time.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

[0027] Hereinafter, the iron plate connecting fitting 100 according to the embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description will not be repeated. Also, in the following description, terms such as "upper", "lower", "horizontal", and "vertical" may be used to mean positions or directions. These terms are used for convenience in order to facilitate the understanding of the embodiment and are not limited to the actual positions or directions during implementation.

[0028] [Regarding the Configuration of the Iron Plate Connecting Fitting 100] Referring to FIGS. 1 and 2 (a longitudinal sectional view taken along line A-A of FIG. 1), the configuration of the paving iron plate connecting fitting 100 according to an embodiment of the present invention will be described. As shown in FIGS. 1 and 2, the paving iron plate connecting fitting 100 includes an upper member 1, a lower member 3, a plurality of fastening bolts 5, and a plurality of disc spring washers 6. Although details will be described later, the upper member 1 is used by switching to either a first mounting posture or a second mounting posture. FIGS. 1 and 2 show the paving iron plate connecting fitting 100 in a state where the upper member is in the first mounting posture.

[0029] When the upper member 1 of the paving iron plate connecting fitting 100 is in the first mounting posture, it connects a first paving iron plate P1 and a second paving iron plate P2 arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first paving iron plate P1.

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

[0031] On the lower surface of the upper member 1, a pair of inclined lower surfaces 11 are formed. As shown in FIG. 2, in a longitudinal sectional view before being fastened, the pair of inclined lower surfaces 11 are inclined downward at a downward slope θ1 with respect to the first lateral direction from both lower outer edges of the flat portion 23 inside the upper member 1 toward both outer ends 15. 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 to penetrate the upper member 1 in the plate thickness direction. In this embodiment, the plurality of through holes 21 are composed of, for example, 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, in a state where the upper member 1 is in the first mounting posture.

[0032] Hereinafter, the direction orthogonal to both the plate thickness direction and the first lateral direction is referred to as the "second lateral direction". As shown in FIG. 1, the pair of through holes 21 are provided at both end portions of the upper member 1 in the second lateral direction.

[0033] On the upper surface 12 of the upper member 1, recessed portions 22 recessed in the plate thickness direction are formed around the respective through holes 21. After tightening the fastening bolt 5, the bolt head is accommodated in the recessed portion 22. Thereby, after tightening the fastening bolt 5, the fastening bolt 5 does not protrude from the upper surface 12 of the upper member 1, so that damage to a tire or the like of a vehicle traveling on the floor plate connecting fitting 100 is prevented.

[0034] On the upper surface of the lower member 3, a pair of inclined upper surfaces 31 are formed. As shown in FIG. 2, the pair of inclined upper surfaces 31 are respectively formed to incline upward from both upper outer edges of the flat portion 41 inside the lower member 3 toward both outer end portions 35.

[0035] Specifically, on each of the pair of inclined upper surfaces 31, for example, a pair of first inclined upper surfaces 32 are formed on the inner side in the first lateral direction and a pair of second inclined upper surfaces 33 are formed on the outer side. As shown in FIG. 2, the first inclined upper surface 32 is formed to incline upward at a first angle θ2 with respect to the first lateral direction from both upper outer edges of the flat portion 41 toward both outer sides. The second inclined upper surface 33 is formed to incline upward at a second angle θ3 with respect to the first lateral direction from both outer sides of the first inclined upper surface toward both outer end portions 35. Here, the second inclination angle θ3 is configured to be smaller than the first inclination angle θ2.

[0036] Note that the first inclined upper surface 32 and the second inclined upper surface 33 may be configured as, for example, a single continuously inclined curved surface. In that case, the inclinations on both outer sides in the first lateral direction in the cross-sectional view may be configured to be smaller than the inner inclination. Also, in the present embodiment, each inclined upper surface 31 is composed of two surfaces, namely the first inclined upper surface 32 and the second inclined upper surface 33, but each inclined upper surface 31 may be composed of three or more surfaces. In that case, each inclined upper surface 31 may be configured such that the inclination in the cross-sectional view becomes smaller toward the outer surface in the first lateral direction.

[0037] Above the flat portion 41 between the pair of inclined upper surfaces 31, a protruding portion 42 that protrudes upward and extends in the second lateral direction is provided. A plurality of fastening screw holes 45 that are screwed with the fastening bolts 5 from above are formed in the protruding portion 42. In the present 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 are provided at both outer end portions in the second lateral direction of the protruding portion 42. 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 the end portion of the protruding portion 42 in the second lateral direction.

[0038] As shown in FIG. 2, the pair of backing plates P are arranged sandwiching the protruding portion 42 of the lower member 3 in the first lateral direction. Then, the upper member 1 and the lower member 3 in the first mounting posture are arranged with the pair of backing plates P sandwiched therebetween. At this time, the backing plate connecting fitting 100 is arranged such that both outer end portions 35 of the inclined upper surface 31 and both outer end portions 15 of the inclined lower surface 11 face each other with the pair of backing plates P sandwiched therebetween.

[0039] With the above configuration, the fastening bolts 5 are tightened, and the upper member 1 and the lower member 3 are fastened with the pair of backing plates P sandwiched in the vertical direction. As a result, both outer end portions 35 of the inclined upper surface 31 and both outer end portions 15 of the inclined lower surface 11 sandwich the pair of backing plates P in the vertical direction respectively.

[0040] Note that the floor iron 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 disc 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 FIGS. 3 and 4 (longitudinal sectional view taken along line B-B of FIG. 3), the floor iron plate connecting fitting 100 in the state where the upper member 1 is in the second mounting posture will be described.

[0042] As shown in the figure, the upper member 1 is rotated, for example, 90° (an example of a predetermined angle) in the direction of the first floor iron plate P1 (an example of one of the floor iron plates) among the pair of floor iron plates P (see FIG. 1) about the axis of one of the pair of fastening bolts 5 from the state of the first mounting posture to become the second mounting posture. Although details will be described later, thereby, both outer end portions 15 of the first inclined upper surface 32 below the first floor iron plate P1 (hereinafter referred to as "one first inclined upper surface 32b") and the inclined lower surface 11 are disposed to face each other. With the above configuration, one of the fastening bolts 5 is tightened, and the upper member 1 and the lower member 3 are fastened with one floor iron plate P1 interposed therebetween. At this time, both outer end portions 15 of the one first inclined upper surface 32b and the inclined lower surface 11 sandwich one floor iron plate P1 in the vertical direction. Thereby, the floor iron plate connecting fitting 100 temporarily connects the pair of floor iron plates P in the first lateral direction.

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

[0044] First, as shown in FIG. 5, for example, a first laying iron plate P1 (an example of one laying iron plate) is placed on one inclined upper surface 31b of the lower member 3. At this time, due to the self-weight of the one laying iron plate P1, the placed one inclined upper surface 31b rotates in the direction D1 of the one laying iron plate P1, and one side of the lower surface 34 of the lower member 3 abuts on the ground.

[0045] Although not shown, the lower surface 34 of the lower member 3 may be formed so as to incline 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) on the first inclined upper surface 32 in the sectional view. That is, the lower surface 34 of the lower member 3 may be configured to be substantially parallel to the first inclined upper surface 32. Thereby, in the state of FIG. 5, since the one first inclined upper surface 32 is substantially parallel to the ground, the one laying iron plate P1 can be stably placed on the one first inclined upper surface 32.

[0046] Also, both side surfaces 44, 44 in the first lateral direction of the protruding portion 42 may be formed to extend in the second lateral direction in a direction intersecting the first inclined upper surface 32. As shown in the drawing, the end portion of the laying iron plate P is generally formed such that the side surface Ps is orthogonal to the upper and lower surfaces Pu, Pb. Since both side surfaces 44, 44 of the protruding portion 42 are configured as described above, in the state of FIG. 5, the side surface 44 of the protruding portion 42 and the side surface Ps of the laying iron plate P can be arranged substantially parallel to each other, thereby preventing the side surface Ps of the laying iron plate P from accidentally coming into contact with the side surface 44 of the protruding portion 42 before the one laying iron plate P1 is sufficiently received inside the laying iron plate connecting fitting 100.

[0047] Next, as shown in FIG. 6, the upper member 1 is arranged in the second mounting posture described above so as to face the one inclined upper surface 31b. Then, one fastening bolt 5b (see FIG. 3) passes through one through hole 21b of the pair of through holes 21 and is screwed into one fastening screw hole 45b, and the upper member 1 is arranged such that the other through hole 21c is located above the one laying iron plate P1.

[0048] At this time, as shown in the figure, the height L1 of the protruding portion 42 with respect to the first inclined upper surface 32 is configured to be the same as or substantially the same as the thickness L2 of the floor iron plate P. Thereby, in the process of tightening one fastening bolt 5b, the peripheral portion of the through hole 21 of the inclined lower surface 11 and the upper surface 43 of the protruding portion 42 come into contact with each other at the portion indicated by reference sign C1. At this time, the bolt head of one fastening bolt 5b comes into contact with the upper surface of the recess 22 of the upper member 1 at the portion indicated by reference sign C2. And both outer end portions 15 of the inclined lower surface 11 and the upper surface Pu of one floor iron plate P1 come into contact with each other. That is, the contact portion C1 between the inclined lower surface 11 and the protruding portion 42 serves as a fulcrum, and one floor iron plate P1 is sandwiched between both outer end portions 15 of the inclined lower surface 11 and the inclined upper surface 31.

[0049] Furthermore, when one fastening bolt 5b is further tightened, a downward acting force F1 is applied to the contact portion C2 from one fastening bolt 5b. At this time, as shown in FIG. 2, since 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 is smaller than the distance between the second inclined upper surface 33 and the inclined lower surface 11. Therefore, one floor iron plate 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 respectively applied to one floor iron plate P1 from the sandwiched portions C3 and C4 (clamping portions) between the upper and lower members 1 and 3. At this time, one floor iron plate P1 is sandwiched by the upper and lower members 1 and 3 near the tip of the floor iron plate P, so that the acting forces F2 and F3 are applied to positions substantially symmetric with respect to the first lateral direction on the upper and lower surfaces Pu and Pb of one floor iron plate P1. Therefore, the upper and lower members 1 and 3 are effectively fastened with one floor iron plate P1 sandwiched therebetween.

[0050] As shown by the phantom line in the figure, one floor iron plate P1 may move in the direction of the arrow D2 shown in the figure due to its own weight. Even when the floor iron plate moves in this way, the floor iron plate connecting fitting 100 is configured as described above, so that the vicinity of the tip of the floor iron plate P can be reliably sandwiched between both outer end portions 15 of the inclined lower surface 11 and the inclined upper surface 31 as shown in the figure.

[0051] Then, as shown in FIG. 7, the other laying iron plate P2 is placed on the other inclined upper surface 31c, and positioning with respect to the one laying iron plate P1 is performed. Since the upper member 1 in the second mounting posture is arranged facing the one inclined upper surface 31b from the fastening bolt 5, the upper part above the other inclined upper surface 31c is open. Therefore, the iron plate connecting fitting 100 can place the other iron plate P2 on the other inclined upper surface 31c while sandwiching the one iron plate P1.

[0052] With the positioning of the iron plate P completed, as shown in FIG. 8, one fastening bolt 5b is loosened and the fastening is once released. At this time, the lower member 3 rotates in the direction D3 of the other iron plate P2 due to the self-weight of the iron plate P, and the lower member 3 contacts each of the pair of iron plates P at both outer ends 35 of the inclined upper surface 31.

[0053] Thereafter, as shown in FIG. 9, the upper member 1 is arranged in the first mounting posture, and the pair of fastening bolts 5 respectively pass through the pair of through holes 21 and are screwed into the pair of fastening screw holes 45 and tightened. As a result, both outer ends 35 of the inclined upper surface 31 and both outer ends 15 of the inclined lower surface 11 sandwich the pair of iron plates P, and acting forces F4 and F5 are respectively applied to each of the pair of iron plates P from the portions C5 and C6 (clamping portions) clamped by the upper and lower members 1 and 3.

[0054] At this time, the distance between the inclined upper surface 31 and the inclined lower surface 11 decreases toward both outer ends 35 and 15 in the first lateral direction from the fastening bolt 5. That is, by providing the clamping portions C5 and C6 of the inclined upper surface 31 and the inclined lower surface 11 at positions facing each other, the acting forces F4 and F5 are applied to positions substantially symmetric with respect to the first lateral direction on the upper and lower surfaces Pu and Pb of the iron plate P. As a result, the upper and lower members 1 and 3 are effectively fastened sandwiching the pair of iron plates P.

[0055] Further, the upper member 1 is configured in a V-shape as viewed in the cross-section by a pair of inclined lower surfaces 11, and the lower member 3 is configured in an inverted V-shape as viewed in the cross-section by a pair of inclined upper surfaces 31, and a pair of floor plates P are clamped at both outer end portions 15, 35 thereof. Therefore, predetermined spaces 17, 37 are respectively formed between the upper member 1 and the upper surface Pu of the floor plate P and between the lower member 3 and the lower surface Pc of the floor plate P. As a result, as shown by phantom lines in FIG. 9, the upper and lower members 1, 3 can be elastically deformed within the predetermined spaces 17, 37 while clamping the pair of floor plates P at both outer end portions 15, 35. Note that the disc spring washer 6 is also elastically deformed by tightening the fastening bolt 5. Thereby, the frictional force at the bolt head seating surface of the fastening bolt 5 is increased, and the fastening bolt 5 can be made difficult to loosen.

[0056] Also, as shown in FIG. 10, since the predetermined spaces 17, 37 are formed, when vertical vibrations D4 as described above are input to the pair of floor plates P, the tip of the floor plate P can move vertically within the predetermined spaces 17, 37 (arrow D5) with the clamping portions C5, C6 as fulcrums, as shown by phantom lines in the figure. That is, the vertical vibration input applied to the floor plate P is converted into the vertical movement of the tip of the floor plate P supported by the clamping portions C5, C6. Thereby, deformation of the upper and lower members 1, 3 due to the vibration input is suppressed, and the acting forces F4, F5 are stably applied from the upper and lower members 1, 3 to the floor plate P.

[0057] Furthermore, as described above, the pair of floor plates P are clamped from above and below by the upper and lower members 1, 3 that are elastically deformed in advance. Therefore, even when vertical vibrations D4 as described above are input to the upper and lower members 1, 3, the acting forces F4, F5 required for clamping the floor plate P are difficult to escape, and the pair of floor plates P can continue to be stably clamped by the upper and lower members 1, 3.

[0058] Although not shown, each of the pair of inclined lower surfaces 11 may be configured to incline downward at an angle equal to a second angle θ3 (see FIG. 2) with respect to the first lateral direction from both lower outer edges of the flat portion 23 toward both outer end portions 15 in the cross-sectional view. Thereby, the steel sheet connecting fitting 100 can secure substantially the same volume of each of the predetermined spaces 17 and 37 formed between the upper and lower surfaces Pu and Pb of the steel sheet P and the upper and lower members 1 and 3. Therefore, the steel sheet connecting fitting 100 can be configured such that the tip of the steel sheet P can move sufficiently as described above, and also can sufficiently allow the elastic deformation of the upper and lower members 1 and 3.

[0059] As shown in FIG. 11, the distance L3 between both outer end portions 15 of the upper member 1 in the first lateral direction may be configured to be wider than the distance L4 between both outer end portions 35 of the lower member 3 in the first lateral direction. As shown in the figure, each of the pair of steel sheets P may be arranged with a slight downward gradient when viewed from the inside to the outside of the steel sheet connecting fitting 100 due to the self-weight of the steel sheet P. Therefore, the surface normal direction C of the steel sheet P inclines slightly upward and outward. The steel sheet connecting fitting 100 is configured such that the distance between both outer end portions 15 of the upper member 1 is wider than the width of both outer end portions 35 of the lower member 3, so that the acting force F4 from the clamping portion C5 to the upper surface Pu of the steel sheet P can be configured to act from the outside more than the acting force F5 from the clamping portion C6 to the lower surface Pb. Thereby, the steel sheet connecting fitting 100 can be configured such that the steel sheet P is clamped vertically on substantially the same surface normal C of the steel sheet P.

[0060] As described above, by using the floor iron plate connecting fitting 100 with the upper member 1 in the second mounting posture, the upper and lower members 1 and 3 can be fastened by sandwiching only the first floor iron plate P1 (one of the floor iron plates). And in the state of being fastened with the first floor iron plate P1 sandwiched therebetween, the second floor iron plate P2 (the other floor iron plate) can be placed on the other inclined upper surface 31c. Thereby, the floor iron plate connecting fitting 100 can temporarily connect the pair of floor iron plates P in order to position the pair of floor iron plates P prior to the connection of the pair of floor iron plates P. At this time, the first floor iron plate P1 is clamped by the upper and lower members 1 and 3 near the tip of the first floor iron plate P1. Therefore, by being clamped at substantially the same positions of the upper and lower surfaces Pu and Pb of the first floor iron plate P1, the upper and lower members 1 and 3 are effectively fastened with the floor iron plate P sandwiched therebetween. Thereby, the floor iron plate connecting fitting 100 can accurately position the pair of floor iron plates P. As a result, the floor iron plate connecting fitting 100 can effectively connect the floor iron plates P.

[0061] And after the pair of floor iron plates P are positioned, the floor iron plate connecting fitting 100 is used by switching the upper member 1 to the first mounting posture, so that the upper and lower members 1 and 3 are fastened at substantially the same positions of the upper and lower surfaces Pu and Pb of the pair of floor iron plates P with the pair of floor iron plates P sandwiched therebetween. Therefore, the pair of floor iron plates P are effectively fastened by the upper and lower members 1 and 3. Also, in the floor iron plate connecting fitting 100, predetermined spaces 17 and 37 are respectively formed between the upper and lower members 1 and 3 and the upper and lower surfaces Pu and Pb of the pair of floor iron plates P. Thereby, even when there is a vibration input from the outside, the vibration input is converted into the movement of the end portion of the floor iron plate P within the predetermined space 17 and 37. Therefore, deformation of the upper and lower members due to the vibration input is suppressed. Also, the upper and lower members are elastically deformed within the predetermined space and are clamped from the vertical direction by the upper and lower members. Thereby, even when there is a vibration input, the floor iron plate P can continue to be stably clamped. Therefore, a decrease in the axial force of the fastening bolt 5 is suppressed, and loosening of the fastening bolt 5 caused thereby is suppressed. As a result, the floor iron plate connecting fitting 100 can stably connect the floor iron plates P over a long period of time.

[0062] Although not shown, the iron plate fastening fitting 100 described above is configured to include both the inclined upper surface 31 and the inclined lower surface 11. However, the iron plate fastening fitting 100 may be configured to have no inclined upper surface 31 and only the inclined lower surface 11. Even in this case, a predetermined space 17 is formed between the upper member and the upper surfaces Pu of the pair of iron plates P. As a result, when vertical vibrations are input to the pair of iron plates P, the ends of the respective iron plates P can move upward in the predetermined space 17 with the portion C5 where the upper member 1 sandwiches the pair of iron plates P as a fulcrum. Also, the pair of iron plates P is clamped vertically by the both outer end portions 15 of the upper member 1 and the lower member 3. That is, the pair of iron plates P is clamped by the upper and lower members 1 and 3 at positions substantially symmetric with respect to the first lateral direction on the upper and lower surfaces Pu and Pb. Further, since the predetermined space 17 is formed as described above, the upper member 1 can be elastically deformed in the predetermined space 17 while clamping the respective iron plates P at the both outer end portions 15. That is, the pair of iron plates P is clamped from above by the upper member 1 that is elastically deformed in advance. Therefore, the axial force reduction of the fastening bolt 5 is suppressed in the iron plate fastening fitting 100 in the same manner as described above, and loosening of the fastening bolt 5 caused thereby is suppressed.

[0063] Also, although not shown, the floor iron plate fastening fitting 100 may be configured to have no inclined lower surface 11 and only have an inclined upper surface 31. Even in this case, a predetermined space 37 is formed between the lower member 3 and the lower surfaces Pb of the pair of floor iron plates P. Thus, when vertical vibrations are input to the pair of floor iron plates P, with the portion C6 where the lower member 3 clamps the pair of floor iron plates as a fulcrum, the ends of the respective floor iron plates P can move downward within the predetermined space 37. Also, the pair of floor iron plates P are clamped vertically by both outer end portions 35 of the upper member 1 and the lower member 3. That is, the pair of floor iron plates P are clamped by the upper and lower members 1 and 3 at positions that are substantially symmetric with respect to the first lateral direction on the upper and lower surfaces Pu and Pb. Further, due to the formation of the predetermined space 37 as described above, the lower member 3 can elastically deform within the predetermined space 37 while clamping the respective floor iron plates P at both outer end portions 35. That is, the pair of floor iron plates P are clamped from both sides by the lower member 3 that is elastically deformed in advance. Therefore, the floor iron plate fastening fitting 100 suppresses a decrease in the axial force of the fastening bolt 5 and suppresses loosening of the fastening bolt 5 caused thereby, in the same manner as described above.

[0064] Note that even when the floor iron plate fastening fitting 100 does not have an inclined lower surface 11, one of the inclined upper surfaces 31 of the lower member 3 and the lower surface of the upper member 1 in the second mounting posture clamp one floor iron plate P1. Specifically, when one floor iron plate P1 is sandwiched between the upper and lower members 1 and 3 as described above and the fastening bolt 5 is tightened, with the contact portion C1 between the lower surface of the upper member 1 and the protruding portion 42 as a fulcrum, one floor iron plate P1 is sandwiched between the lower surface of the upper member 1 and one of the inclined upper surfaces 31b. And in the same manner as described above, one floor iron plate P1 is finally clamped between the lower surface of the upper member 1 and the first inclined upper surface 32b. That is, one floor iron plate P1 is securely clamped near the tip of the floor iron plate P by the upper and lower members 1 and 3. Therefore, the floor iron plate fastening fitting 100 can accurately position the pair of floor iron plates P in the same manner as described above.

[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-described embodiments, and can be implemented in various forms without departing from the gist thereof. The drawings schematically show each component mainly for easy understanding, and the thickness, length, number, interval, etc. of each illustrated component are different from the actual ones for convenience of drawing preparation. Further, the materials, shapes, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various changes can be made without substantially departing from the configuration of the present invention.

Explanation of Reference Numerals

[0066] P Paving iron plate θ1 Downward gradient θ2 First angle θ3 Second angle 1 Upper member 11 Inclined lower surface 15 Outer end of the inclined lower surface 21 Through hole 22 Recess 3 Lower member 31 Inclined upper surface 32 First inclined upper surface 33 Second inclined upper surface 35 Outer end of the inclined upper surface 42 Protrusion 44 Side surface of the protrusion 45 Fastening screw hole 5 Fastening bolt 100 Paving iron plate connecting fitting

Claims

1. A connecting fitting for connecting a first floor iron plate and a second floor iron plate arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first floor iron plate, comprising: a lower member disposed below the first and second floor iron plates; an upper member disposed above the first and second floor iron plates; a fastening bolt for fastening the upper member and the lower member with the first and second floor iron plates sandwiched therebetween; and is provided with the upper member can be switched between a first mounting posture and a second mounting posture and fastened to the lower member; the fastening bolt is disposed sandwiched between the end of the first floor iron plate and the end of the second floor iron plate; the lower member has a pair of inclined upper surfaces that incline upward toward both outer ends in the first lateral direction from the fastening bolt in a longitudinal sectional view in a state before being fastened; the upper member has a pair of inclined lower surfaces that incline downward toward both outer ends in the first lateral direction from the fastening bolt in the sectional view; A floor iron plate connecting fitting, characterized in that when the upper member is fastened to the lower member in the first mounting posture, the distance between the inclined upper surface and the inclined lower surface decreases toward both outer ends in the first lateral direction from the fastening bolt.

2. The inclined upper surface has a smaller inclination on both outer sides in the first lateral direction in the sectional view than the inclination on the inner side; the fastening bolt fastens the upper member and the lower member at an end in a second lateral direction orthogonal to both the plate thickness direction and the first lateral direction; the lower member has a protruding portion that protrudes upward between the inclined upper surfaces and is fastened by the fastening bolt; the upper member is rotated by a predetermined angle in the direction of one of the first and second floor iron plates about the axis of the fastening bolt from the first mounting posture to become the second mounting posture; when the upper member is fastened to the lower member in the second mounting posture with one of the floor iron plates sandwiched therebetween; the inclined lower surface abuts on the upper surface of the protruding portion and the upper surface of one of the floor iron plates; The floor iron plate connecting fitting according to claim 1, characterized in that the distance between the inclined upper surface and the inclined lower surface is smaller on the inner side than on the outer side in the first lateral 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 inclines upward at a first angle toward both outer sides in the first lateral direction from the fastening bolt in the sectional view; the second inclined upper surface inclines 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 lateral direction in the sectional view. The iron plate connecting fitting according to claim 2, wherein when the upper member is fastened to the lower member in the second mounting posture with one iron 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. The iron plate connecting fitting according to claim 1, wherein the inclined lower surface inclines downward at the same inclination as the inclined upper surface in the cross-sectional view.

5. The iron plate connecting fitting according to claim 3, wherein the inclined lower surface inclines downward at an angle equal to the second angle in the cross-sectional view.

6. The iron plate connecting fitting according to any one of claims 1 to 5, wherein the distance between both outer ends of the inclined lower surface in the first lateral direction is wider than the distance between both outer ends of the inclined upper surface in the first lateral direction.

7. The iron plate connecting fitting according to claim 3 or claim 5, wherein both side surfaces of the protruding portion extend in the second lateral direction in a direction orthogonal to the first inclined upper surface.

8. An iron plate connecting fitting for connecting a first iron plate and a second iron plate arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first iron plate, a lower member disposed below the first and second iron plates, an upper member disposed above the first and second iron plates, and a fastening bolt for fastening the upper member and the lower member with the first and second iron plates sandwiched therebetween. comprising the upper member is switchable between a first mounting posture and a second mounting posture and can be fastened to the lower member, the fastening bolt is disposed sandwiched between the end of the first iron plate and the end of the second iron 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 lateral direction in a longitudinal cross-sectional view before being fastened, The iron plate connecting fitting is 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 toward both outer ends in the first lateral direction from the fastening bolt.

9. An iron plate connecting fitting for connecting a first iron plate and a second iron plate arranged side by side in a first lateral direction orthogonal to the plate thickness direction of the first iron plate, a lower member disposed below the first and second iron plates, an upper member disposed above the first and second iron plates, and a fastening bolt for fastening the upper member and the lower member with the first and second iron plates sandwiched therebetween. comprising The fastening bolt is disposed between the end of the first floor iron plate and the end of the second floor iron plate. The upper member has a pair of inclined lower surfaces that slope downward toward both outer ends in the first lateral direction from the fastening bolt in a longitudinal cross-sectional view in a state before being fastened. The floor iron plate connecting fitting is 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 toward both outer ends in the first lateral direction from the fastening bolt.

10. The inclined upper surface has a smaller inclination on both outer sides in the first lateral direction in the cross-sectional view than the inclination on the inner side. The fastening bolt fastens the upper member and the lower member at the end in the second lateral direction that is orthogonal to both the plate thickness direction and the first lateral direction. The lower member has a protruding portion that protrudes upward between the inclined upper surfaces and to which the fastening bolt is fastened. The upper member is rotated by a predetermined angle in the direction of one of the first and second floor iron plates about the axis of the fastening bolt from the first mounting posture to become the second mounting posture. When the upper member is fastened to the lower member in the second mounting posture with one of the floor iron plates sandwiched therebetween. The lower surface of the upper member abuts on the upper surface of the protruding portion and the upper surface of one of the floor iron plates. The floor iron plate connecting fitting according to claim 8, characterized in that the distance between the inclined upper surface and the lower surface of the upper member is smaller on the inner side than on the outer side in the first lateral direction.

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