Rail structure for carriage

Abstract

To provide a rail structure for a carriage enabling simplified work of adjusting rail height by raising the rail alone rather than both the rail and the rail base.SOLUTION: A rail structure for a carriage, comprising: a rail base (a first rail base 4) placed on a rail installation surface (ground 6); and a rail 3 placed on the rail base, the rail allowing the wheels of the carriage to be placed thereon, enabling the carriage to travel. A height position adjustment member 15 is interposed between the rail base and the rail to adjust the height position of the rail relative to the rail base.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a rail structure for a carriage that enables carriages to travel in, for example, agricultural greenhouses, plant factories, etc. [Background technology]

[0002] Conventionally, when harvested crops are loaded onto a harvesting cart and transported inside an agricultural greenhouse, a cart rail structure is sometimes used to allow the harvesting cart to travel along a specified path. Conventional cart rail structures of this type are described, for example, in Patent Document 1 and Patent Document 2. The rail structures for carriages described in these documents include a rail base placed on a rail installation surface and a rail placed on the rail base. In this rail structure for carriages, a pair of rails are used, one on the left and one on the right, and the wheels of the harvesting carriage are placed on each of these rails, allowing the harvesting carriage to travel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6216846 [Patent Document 2] Japanese Patent Application Laid-Open No. 2018-64498 Summary of the Invention [Problem to be solved by the invention]

[0004] In the bogie rail structures shown in Patent Documents 1 and 2, if the rail installation surface is an uneven, uneven surface, spacers are placed between the rail installation surface and the rail base to adjust the height position of the rail, thereby aligning the height position of the rail throughout the entire length of the rail. This requires lifting the rail base and rail and inserting the spacer under the rail base, which is time-consuming and labor-intensive.

[0005] To provide a rail structure for a carriage which allows the adjustment of the height position of the rail to be easily performed by lifting only the rail, instead of both the rail base and the rail. [Means for solving the problem]

[0006] In order to achieve this object, the rail structure for a bogie of the present invention comprises a rail base that is placed on a rail installation surface, and a rail that is placed on the rail base and on which the wheels of the bogie are placed, allowing the bogie to run, and a height position adjustment member is inserted between the rail base and the rail to adjust the height position of the rail relative to the rail base. The rail base may be common to two of the rails laid parallel to each other with a gap between them, or the rail base may be provided individually for each of the two rails laid parallel to each other with a gap between them. In the former case, the height position adjustment member may be inserted between the rail base and the rail for each of the rails, or the height position adjustment member may be inserted between the rail base for only one of the rails, or the height position adjustment member may be inserted between the rail base for both of the rails at once. In the latter case, the height position adjustment member may be inserted between one of the two rails and the rail base, and not between the other rail and the rail base, or the height position adjustment member may be inserted between both rails and the rail base.

[0007] In the rail structure for a bogie of the present invention, the rail base and the rail may be connected by a connecting member, and the height position adjustment member may be engaged with the connecting member and inserted between the rail base and the rail.

[0008] In the bogie rail structure of the present invention, the connecting member may be a rod-shaped member whose length direction is in the up-down direction.

[0009] In the rail structure for a bogie of the present invention, the rod-shaped member may be a bolt inserted through a hole provided in one of the rail base and the rail and screwed into a female threaded hole provided in the other.

[0010] In the present invention, in the rail structure for a bogie, the height position adjustment member is a plate-like member whose thickness direction is in the up-down direction, and this plate-like member may be formed with a notch portion that opens toward the outside for inserting and engaging the rod-like member.

[0011] In the rail structure for a bogie of the present invention, the number of plate-like members inserted between the rail base and the rail may be changeable, and multiple plate-like members may be stacked in the vertical direction and inserted between the rail base and the rail.

[0012] In the present invention, in the rail structure for a bogie, among the multiple plate-like members stacked in the vertical direction, there may be a plate-like member whose thickness dimension is larger than that of the other plate-like members.

[0013] In the rail structure for a bogie of the present invention, the rail base may be common to two rails laid parallel to each other with a gap between them, and the height position adjustment member may be insertable between the rail base and the rail for each rail.

[0014] In the rail structure for a bogie of the present invention, the rail base is provided individually for each of the two rails laid in parallel with a gap between them, and the height adjustment member may be insertable between at least one of the individual rail bases and the rail.

[0015] In the rail structure for a bogie of the present invention, the rail base may be a first rail base, and the rail may also be placed on a second rail base placed on the rail installation surface and spaced apart from the first rail base in the length direction of the rail, and the second rail base and the rail may be connected by a connecting member with a height position adjustment function that allows the height position of the rail relative to the second rail base to be adjusted.

[0016] In the rail structure for a bogie of the present invention, the rail is placed on the connecting member with height position adjustment function, and the connecting member with height position adjustment function is connected to the second rail base by a fastener, and the hole provided in the connecting member with height position adjustment function for inserting the shaft portion of the fastener may be a long hole that is long in the vertical direction.

[0017] In the rail structure for a bogie of the present invention, the connecting member with height position adjustment function may be provided with rail holding portions for holding the rail on both sides in a direction perpendicular to the longitudinal direction of the rail.

[0018] In the rail structure for a bogie of the present invention, the rail may be configured to include a plurality of rail members and a rail connecting member for connecting two of the rail members adjacent in the longitudinal direction of the rail, and the height position adjustment member may be inserted between the rail base and the rail connecting member. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a rail structure for a bogie that allows the adjustment of the height position of the rail to be easily performed by lifting only the rail, rather than both the rail base and the rail. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of a carriage rail structure and a harvesting carriage according to the present invention. [Figure 2]FIG. 2 is a perspective view showing a bogie rail structure. [Figure 3] FIG. 3 is a diagram showing the rail connecting member. [Figure 4] FIG. 4 is a diagram showing a part of the bogie rail structure. [Figure 5] FIG. 5 is an exploded perspective view showing the connection structure between the first rail base and the rail connecting member. [Figure 6] FIG. 6 is an enlarged perspective view of a portion of the bogie rail structure. [Figure 7] FIG. 7 is a diagram showing a height position adjusting member. [Figure 8] FIG. 8 is a diagram showing a part of a carriage rail structure to which a height position adjusting member is attached. [Figure 9] FIG. 9 is a cross-sectional view showing a part of a carriage rail structure in which the number of height position adjusting members is changed. [Figure 10] FIG. 10 is a perspective view showing height position adjusting members having different thicknesses. [Figure 11] FIG. 11 is a cross-sectional view showing a part of a carriage rail structure to which a plurality of height adjustment members having different thicknesses are attached. [Figure 12] FIG. 12 is a perspective view of the second rail base. [Figure 13] FIG. 13 is a diagram showing a connecting member with a height position adjusting function. [Figure 14] FIG. 14 is a diagram showing the second rail base. [Figure 15] FIG. 15 is a cross-sectional view showing the lower limit position and the upper limit position of the rail on the second rail base. [Figure 16] FIG. 16 is a perspective view showing a modified example of the first rail base and the second rail base. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of a carriage rail structure according to the present invention will be described in detail with reference to Figs. 1 to 15. In this embodiment, an example of a carriage rail structure used in an agricultural greenhouse (not shown) will be described. The agricultural greenhouse referred to here is used for cultivating agricultural products such as vegetables and fruits, and includes buildings for plant factories.

[0022] The carriage rail structure 1 shown in Figure 1 is used to define the travel path of a carriage 2 that transports harvested produce in an agricultural greenhouse. This carriage rail structure 1 includes two rails 3 and a plurality of first rail bases 4 and second rail bases 5 on which these rails 3 are mounted. The two rails 3 are supported by the first rail bases 4 and second rail bases 5 and are laid parallel to each other at a fixed interval. The first rail base 4 and second rail base 5 are placed on the ground 6 of the agricultural greenhouse, which serves as the rail installation surface. The cart 2 has four wheels 7. These wheels 7 rotate while being placed on the rails 3. The cart 2 is pushed by an operator (not shown), causing the wheels 7 to rotate on the rails 3, thereby enabling the cart 2 to travel along the rails 3.

[0023] (Rail description) As shown in FIG. 2, the rail 3 is configured to include a plurality of rail members 8 made of round pipes, and a rail connecting member 9 that connects two adjacent rail members 8 in the longitudinal direction of the rail 3. As shown in Figures 3(A) to 3(C), the rail connecting member 9 is formed of a single cylindrical body. Figure 3(A) is a bottom view of the rail connecting member 9 as seen from the ground side, (B) is a cross-sectional view taken along line BB in Figure 3(A), and (C) is a cross-sectional view taken along line CC in Figure 3(A). The rail connecting member 9 according to this embodiment has a rail base connecting portion 9a formed in the center in the longitudinal direction, and pipe connecting portions 9b formed on both sides of the rail base connecting portion 9a.

[0024] The outer diameter of the rail base connecting portion 9a is larger than the outer diameter of the pipe connecting portion 9b. Furthermore, it is desirable that the outer diameter of the rail base connecting portion 9a be equal to the outer diameter of the rail member 8. The outer diameter of the pipe connecting portion 9b is an outer diameter that allows the pipe connecting portion 9b to fit into the rail member 8. The rail base connecting portion 9a is formed with a female screw hole 10. This female screw hole 10 is used to connect the rail connecting member 9 to the first rail base 4, which will be described later.

[0025] (Description of the rail stand) As shown in Figure 2, the first rail base 4 and the second rail base 5 are formed by square pipes 11, 12 that extend in a direction perpendicular to the direction in which the two rails 3 extend. The first rail base 4 and the second rail base 5 in this embodiment are common to the two rails 3 that are laid in parallel with a gap between them. The first rail base 4 corresponds to the "rail base" of the present invention, and is connected to the aforementioned rail connecting member 9 as shown in Figures 4(A) to 4(C). Figure 4(A) is a plan view of the first rail base 4 and a portion of the two rails 3, (B) is a cross-sectional view taken along line BB in Figure 4(A), and (C) is a cross-sectional view taken along line CC in Figure 4(A).

[0026] By connecting the rail connecting member 9 to the first rail base 4, the first rail base 4 is positioned at a position where the rail members 8 are connected to each other. The second rail base 5 is placed on the ground, spaced apart from the first rail base 4 in the longitudinal direction of the rail 3. Both ends of one rail member 8 are supported by the first rail base 4 via the rail connecting members 9. The middle portion of one rail member 8 in the longitudinal direction is placed on top of multiple second rail bases 5.

[0027] (Description of the connecting portion between the first rail base and the rail connecting member) The first rail base 4 and the rail 3 (rail connecting member 9) are connected by a connecting member 13, as shown in Figures 4(B), (C) and 5. The connecting member 13 is a rod-shaped member whose length is in the vertical direction. In this embodiment, the rod-shaped member is formed by a bolt.

[0028] This connecting member 13, which is made up of a bolt, is inserted from inside the square pipe 11 into a first through-hole 14 (see FIG. 5) provided in the upper wall 11a of the square pipe 11 that constitutes the first rail base 4, and is screwed into the female threaded hole 10 of the rail connecting member 9. When the rail connecting member 9 is attached to the first rail base 4 with the pipe connection portion 9b of the rail connecting member 9 fitted into the rail member 8 (with the rail members 8 connected to each other via the rail connecting member 9), the rail member 8 comes into contact with the upper surface (upper wall 11a) of the first rail base 4, and the first rail base 4 supports the weight of the carriage 2 traveling on the rail 3.

[0029] The ground 6 inside an agricultural greenhouse may be uneven due to its own unevenness or convex parts such as electrical cords and water supply pipes installed on the ground. This can cause problems such as one of the two rails 3 being lower than the other rail 3, or interference between the rails 3 and convex parts of the ground 6. In such cases, as shown in Figure 6, a height position adjustment member 15 is inserted between the first rail base 4 and the rails 3 to adjust the height of the rails 3 relative to the first rail base 4.

[0030] 6 shows that a height adjustment member 15 is inserted between one of the two rails 3 and the first rail base 4, but a height adjustment member 15 can also be inserted between the other rail 3 and the first rail base 4. In other words, a height adjustment member 15 can be inserted between the first rail base 4 and rail 3 for each rail 3. Note that the second rail base 5 is also provided with a mechanism for adjusting the height of the rail 3, as will be described in detail later.

[0031] The height adjustment member 15 according to this embodiment is formed of a plate-shaped member 16 as shown in Figures 7(A) to (C). Figure 7(A) is a plan view of the plate-shaped member 16 that is the height adjustment member 15, (B) is a front view, and (C) is a perspective view. The plate-shaped member 16 has a notch 17 formed therein for inserting and engaging the aforementioned connecting member 13 (a bolt, which is a rod-shaped member). The notch 17 extends from the center of the plate-shaped member 16 toward one side of the plate-shaped member 16 with a predetermined opening width, and opens toward the outside of the plate-shaped member 16. The opening width of the notch 17 is greater than the outer diameter of the connecting member 13.

[0032] As shown in Figures 8(A) to 8(C), this plate-like member 16 is inserted between the first rail base 4 and the rail connecting member 9 with the connecting member 13 inserted all the way into the notch 17, with the thickness direction being the up-down direction. That is, the plate-like member 16 is engaged with the connecting member 13 and inserted between the first rail base 4 and the rail 3 (rail connecting member 9). Figure 8(A) is a plan view of the connecting portion between the first rail base 4 and the rail connecting member 9, (B) is a side view seen from the opening of the first rail base 4, and (C) is a front view seen from the length direction of the rail 3. The operation of inserting the plate-like member 16 between the first rail base 4 and the rail connecting member 9 is performed with the connecting member 13 loosened and the rail connecting member 9 pulled up from the first rail base 4.

[0033] The number of plate-like members 16 inserted between the first rail base 4 and the rail connecting member 9 can be changed as shown in Figures 9(A) to 9(C). Figure 9(A) is a cross-sectional view when one plate-like member 16 is used, (B) is a cross-sectional view when two plate-like members 16 are used, and (C) is a cross-sectional view when three plate-like members 16 are used. As shown in Figures 9(A) to 9(C), in the bogie rail structure 1 according to this embodiment, multiple plate-like members 16 are stacked in the vertical direction and can be inserted between the first rail base 4 and the rail 3 (rail connecting member 9).

[0034] 9(A) to 9(C) depict one type of plate-like member 16. However, in the bogie rail structure 1 according to this embodiment, as shown in FIGS. 10 and 11, a combination of multiple types of plate-like members 16 with different thicknesses can be used. In this case, among the multiple plate-like members 16 stacked in the vertical direction, there will be plate-like members 16 that are thicker than the other plate-like members 16. In FIGS. 10 and 11, the plate-like members 16 that are relatively thin are indicated by the reference symbol 16a, and the plate-like members 16 that are relatively thick are indicated by the reference symbol 16b.

[0035] (Explanation of the second rail stand) The rail 3 is also placed on a second rail base 5, which is placed on the ground 6 (rail installation surface) and spaced apart from the first rail base 4 in the length direction of the rail 3. For this reason, when the height position of the rail 3 relative to the first rail base 4 is increased by a height position adjustment member 15 made of a plate-like member 16, it is also necessary to change the height position of the rail 3 relative to the second rail base 5 adjacent to the first rail base 4. The second rail base 5 and the rail 3 in this bogie rail structure 1 are connected by a connecting member 21 with a height position adjustment function (hereinafter simply referred to as a height adjustment connecting member 21) that enables the height position of the rail 3 relative to the second rail base 5 to be adjusted, as shown in FIG.

[0036] Height-adjusting connecting members 21 are arranged at both longitudinal ends of second rail base 5, and are joined to second rail base 5 by fasteners 22 that pass through second rail base 5 in the longitudinal direction of rail 3. Rail 3 is placed on height-adjusting connecting members 21. Fasteners 22 in this embodiment are made up of bolts 22a and nuts 22b, as shown in Figure 12 and Figures 14(A) to (C).

[0037] The height-adjusting connecting member 21 according to this embodiment is formed in a gate shape so that it can be placed over the second rail base 5, which is made of square pipes 12. Specifically, as shown in FIGS. 13(A)-(D) and 14(A)-(C), the height-adjusting connecting member 21 has a pair of side plates 23, 24 and a top plate 25 connecting these side plates 23, 24. FIG. 13(A) is a plan view of the height-adjusting connecting member 21, (B) is a front view, (C) is a side view, and (D) is a perspective view. FIG. 14(A) is a plan view of the second rail base 5 and the height-adjusting connecting member 21, (B) is a cross-sectional view taken along line BB in FIG. 14(A), and (C) is a cross-sectional view taken along line CC in FIG. 14(A). FIGS. 14(B) and 14(C) show the rail 3 placed on the height-adjusting connecting member 21.

[0038] As shown in Figure 14(B), the pair of side plates 23, 24 of the height-adjusting connecting member 21 are placed on the two side walls 12a, 12a of the square pipe 12 that constitutes the second rail base 5. A second through hole 26 is formed in these side plates 23, 24 for inserting the shank (bolt 22a) of the fastener 22. The second through hole 26 is an elongated hole that is long in the vertical direction. The hole formed in the side walls 12a, 12a of the square pipe 12 for inserting the shank (bolt 22a) of the fastener 22 is a circular hole. As shown in Figure 14(C), the upper plate 25 of the height-adjusting connecting member 21 has a flat plate portion 25a that is placed on top of the upper wall 12b of the square pipe 12, and rail retaining portions 25b that protrude upward from both ends of the flat plate portion 25a.

[0039] 14(A), the rail retaining portions 25b are provided on both ends of the upper plate 25 in a direction perpendicular to the longitudinal direction of the rail 3 (the up-down direction in FIG. 14(A)), and protrude upward by a predetermined length from the upper plate 25. When the rail 3 is placed on this height-adjusting connecting member 21 (when the rail 3 is placed on the upper plate 25), the rail retaining portions 25b come into contact with the outer peripheral surface of the rail 3 (rail member 8) as shown in FIG. 14(C), thereby preventing the rail 3 from falling off the height-adjusting connecting member 21.

[0040] The height-adjusting connecting member 21 can be moved up and down relative to the second rail base 5 between the lowest position shown in Fig. 15(A) and the highest position shown in Fig. 15(B) by loosening the fasteners 22. That is, as shown in Fig. 15(A), the height-adjusting connecting member 21 is positioned at the lowest position with the upper plate 25 of the height-adjusting connecting member 21 in contact with the upper surface of the second rail base 5. Also, as shown in Fig. 15(B), the height-adjusting connecting member 21 is positioned at the highest position with the bolt 22a of the fastener 22 in contact with the lowermost part of the second through-hole 26.

[0041] (Explanation of effects according to the embodiment) In the rail structure 1 for a bogie configured in this manner, if the height of the rail 3 needs to be increased in accordance with the unevenness of the ground surface 6 (rail installation surface) or the convex parts on the ground surface 6, the height position adjustment member 15 can be inserted between the rail 3 and the first rail base 4, and the height adjustment connecting member 21 can be moved upward relative to the second rail base 5. Therefore, the work of adjusting the height position of the rail can be easily performed by lifting only the rail, rather than both the rail base and the rail.

[0042] In the bogie rail structure 1 according to this embodiment, the first rail base 4 and the rail 3 are connected by a connecting member 13. The height position adjustment member 15 is inserted between the first rail base 4 and the rail 3 and engaged with the connecting member 13 by inserting and engaging the connecting member 13 into the notch 17. Therefore, the connecting member 13 can effectively prevent the height position adjusting member 15 inserted between the first rail base 4 and the rail 3 from shifting.

[0043] The connecting member 13 in this embodiment is a rod-shaped member with its length in the vertical direction, which makes it easy to move the rail 3 up and down relative to the first rail base 4 using the connecting member 13 as a guide.

[0044] The rod-shaped member that is the connecting member 13 in this embodiment is a bolt that is inserted through a first through-hole provided in the first rail base 4 and screwed into the female threaded hole 10 of the rail 3. Therefore, the vertical position of the rail 3 relative to the first rail base 4 can be easily changed by rotating the bolt.

[0045] The height position adjusting member 15 according to this embodiment is a plate-like member 16 whose thickness is in the up-down direction. This plate-like member 16 has a notch 17 formed therein that opens outward and into which the connecting member 13 made of a rod-like member is inserted and engaged. Therefore, the work of inserting the height position adjustment member 15 between the first rail base 4 and the rail 3 can be easily performed while maintaining the connected state of the first rail base 4 and the rail 3 by the connecting member 13.

[0046] In this embodiment, the number of plate-like members 16 inserted between the first rail base 4 and the rail 3 can be changed. That is, a plurality of plate-like members 16 can be stacked in the vertical direction and inserted between the first rail base 4 and the rail 3. Therefore, by inserting any number of plate-like members 16 between the first rail base 4 and the rail 3, the height position of the rail 3 relative to the first rail base 4 can be adjusted accurately.

[0047] In the bogie rail structure 1 according to this embodiment, among the multiple plate-like members 16 stacked in the vertical direction, there can be a plate-like member 16 that has a thickness dimension larger than the other plate-like members 16. Therefore, the number of plate-like members 16 that are stacked in the vertical direction can be reduced.

[0048] The first rail base 4 in this embodiment is common to two rails 3 laid parallel to each other with a gap between them, and for each rail 3, a height position adjustment member 15 can be inserted between the first rail base 4 and the rail 3. Therefore, the height of each rail 3 can be adjusted individually, and the height of each rail 3 can be adjusted more accurately.

[0049] In this embodiment, the rail 3 is also placed on a second rail base 5 placed on a rail installation surface (ground surface 6) away from the first rail base 4 in the longitudinal direction of the rail 3. The second rail base 5 and the rail 3 are connected by a connecting member 21 with a height position adjustment function that allows the height position of the rail 3 relative to the second rail base 5 to be adjusted. Therefore, even if there is not only a first rail base 4 on which the rail 3 is placed and into which a height position adjustment member 15 is inserted between the rail 3, but also a second rail base 5 on which no height position adjustment member 15 is inserted between the rail 3, when the height position of the rail 3 relative to the first rail base 4 is adjusted by the height position adjustment member 15, the height position of the rail 3 relative to the second rail base 5 can be adjusted by a connecting member 21 with a height position adjustment function, and the second rail base 5 and the rail 3 can be connected.

[0050] In this embodiment, the rail 3 is placed on a connecting member 21 with a height-adjustable function. The connecting member 21 with a height-adjustable function is connected to the second rail base 5 by a fastener 22. A second through-hole 26 provided in the connecting member 21 with a height-adjustable function for inserting the shaft portion of the fastener 22 is an elongated hole that is long in the vertical direction. Therefore, the height position of the rail 3 relative to the second rail base 5 can be adjusted accurately and steplessly by using the long holes.

[0051] In this embodiment, the connecting member 21 with height position adjustment function is provided with rail holding portions 25b for holding the rail 3 on both sides in a direction perpendicular to the longitudinal direction of the rail 3. Therefore, the rail restraining portion 25b of the connecting member 21 with height position adjustment function can prevent the rail 3 from shifting relative to the second rail base 5 in a direction perpendicular to the longitudinal direction of the rail 3.

[0052] The rail 3 according to this embodiment is configured to include a plurality of rail members 8 and a rail connecting member 9 for connecting two rail members 8, 8 adjacent in the longitudinal direction of the rail 3. A height position adjusting member 15 is inserted between the first rail base 4 and the rail connecting member 9. The rail connecting member 9 has high rigidity in order to connect the rail members 8 together. By inserting the height position adjusting member 15 between such a highly rigid rail connecting member 9 and the first rail base 4, the rail 3 can be firmly supported despite the height of the rail 3, and the support of the rail 3 becomes stable.

[0053] (Description of modified rail base) The bogie rail structure according to the present invention can be configured as shown in Figures 16(A) and 16(B). In these figures, the same or equivalent members as those described in Figures 1 to 15 are designated by the same reference numerals, and detailed descriptions thereof will be omitted where appropriate. 16(A) shows a bogie rail structure 31 in which the first rail bases 4 are individually provided for each of the two rails 3. A height position adjustment member 15 can be inserted between the first rail bases 4 for each of these rails 3 and the rail 3.

[0054] 16(B) is provided with a second rail base 5 for each of the two rails 3. The height positions of the rails 3 can also be adjusted individually for each of the second rail bases 5 for each of the rails 3 by using connecting members 21 with a height position adjustment function. Even when the first rail base 4 and the second rail base 5 are configured for each rail 3 as shown in Figures 16(A) and (B), the work of adjusting the height position of the rail 3 can be easily performed by lifting only the rail 3, as when the above-mentioned embodiment is adopted.

[0055] In the above-described embodiment, an example has been shown in which the connecting member 13 that connects the rail 3 and the first rail base 4 is screwed into the female threaded hole 10 of the rail connecting member 9. However, although not shown, the connecting member 13 can also be configured to protrude downward from the rail 3 side and be inserted into the first through-hole of the first rail base 4. In this case, the connecting member 13 can be fixed to the rail 3 so that it cannot rotate, and the rail 3 and the first rail base 4 can be connected by tightening a nut on the connecting member 13 inside the first rail base 4.

[0056] The joining member 13 can also be configured as a pin that protrudes downward from the rail connecting member 9. In this case, the pin is inserted from above into the first through-hole 14 of the first rail base 4, thereby restricting horizontal movement of the rail 3 relative to the first rail base 4. Furthermore, in the above-described embodiment, an example has been shown in which the notches 17 are formed to allow the joining members 13 to engage with the height position adjusting members 15. However, instead of the notches 17, through holes may be formed that penetrate the plate-like member 16 in the thickness direction. [Industrial Applicability]

[0057] The present invention can be used as a running path for running a cart such as a harvesting cart inside an agricultural greenhouse. [Explanation of symbols]

[0058] 1, 31, 32...rail structure for bogie, 2...bogie, 3...rail, 4...first rail base (rail base), 5...second rail base, 6...ground surface (rail installation surface), 7...wheel, 8...rail member, 9...rail connecting member, 10...female thread hole, 13...connecting member, 14...first through hole, 15...height position adjustment member, 16, 16a, 16b...plate-shaped member, 17...notch portion, 21...connecting member with height position adjustment function, 22...fastener, 22a...bolt (shaft portion), 25b...rail retaining portion, 26...second through hole.

Claims

1. A bogie rail structure including a rail base that is placed on a rail installation surface, and a rail that is placed on the rail base and on which the wheels of a bogie are placed so that the bogie can run, A rail structure for a bogie, characterized in that a height position adjustment member is inserted between the rail base and the rail for adjusting the height position of the rail relative to the rail base.

2. 2. The bogie rail structure according to claim 1, wherein the rail base and the rail are connected by a connecting member, 10. A rail structure for a carriage, wherein the height position adjusting member is engaged with the connecting member and inserted between the rail base and the rail.

3. The bogie rail structure according to claim 2, A bogie rail structure, characterized in that the connecting member is a rod-shaped member whose length is in the vertical direction.

4. The bogie rail structure according to claim 3, A rail structure for a bogie, characterized in that the rod-shaped member is a bolt inserted through a hole provided in one of the rail base and the rail and screwed into a female threaded hole provided in the other.

5. The bogie rail structure according to claim 3, The height position adjustment member is a plate-shaped member whose thickness direction is the up-down direction, and this plate-shaped member has a notch formed that opens toward the outside for inserting and engaging the rod-shaped member.

6. The bogie rail structure according to claim 5, The number of the plate-like members inserted between the rail base and the rail is changeable, A rail structure for a bogie, characterized in that a plurality of the plate-like members are stacked in the vertical direction and can be inserted between the rail base and the rail.

7. The bogie rail structure according to claim 6, A rail structure for a bogie, characterized in that among the multiple plate-like members stacked in the vertical direction, there are plate-like members whose thickness dimensions are greater than that of the other plate-like members.

8. The bogie rail structure according to claim 1, The rail structure for a bogie is characterized in that the rail base is common to two rails laid parallel to each other at a distance, and the height position adjustment member can be inserted between the rail base and the rail for each rail.

9. The bogie rail structure according to claim 1, The rail structure for a bogie is characterized in that the rail base is provided individually for each of the two rails laid parallel to each other at a distance, and the height adjustment member can be inserted between at least one of the individual rail bases and the rail.

10. The bogie rail structure according to claim 1, the rail base is a first rail base, The rail is also placed on a second rail base that is placed on the rail installation surface and spaced apart from the first rail base in the length direction of the rail, A rail structure for a bogie, characterized in that the second rail base and the rail are connected by a connecting member with a height position adjustment function that allows the height position of the rail relative to the second rail base to be adjusted.

11. The bogie rail structure according to claim 10, The rail is placed on the connecting member with height position adjustment function, and the connecting member with height position adjustment function is connected to the second rail base by a fastener, and the hole provided in the connecting member with height position adjustment function for inserting the shaft portion of the fastener is a long hole that is long in the vertical direction.

12. The bogie rail structure according to claim 11, A rail structure for a bogie, characterized in that the connecting member with height position adjustment function is provided with rail holding portions for holding the rail on both sides in a direction perpendicular to the longitudinal direction of the rail.

13. The bogie rail structure according to any one of claims 1 to 12, The rail is configured to include a plurality of rail members and a rail connecting member for connecting two of the rail members adjacent in the longitudinal direction of the rail, 10. A rail structure for a bogie, wherein the height position adjusting member is inserted between the rail base and the rail connecting member.

Images