Yamakoshi Pottery

Abstract

To provide a mountain crossing device equipped with a resin running beam that satisfies the required strength and rigidity characteristics. [Solution] The present invention provides a mountain crossing device 10 equipped with a running girder 12 to which a hanging device 100 for holding a suspended object M can be attached. The running girder 12 of the mountain crossing device 10 includes a laminated structure LC in which a plurality of composite resin layers (L1, L2) are stacked. The laminated structure LC also includes a first composite resin layer L1 having higher strength and rigidity in the direction of the hanging load acting when the hanging device 100 is attached than in other directions, and a second composite resin layer L2 having higher strength and rigidity in the other directions than the first composite resin layer L1.

Description

[Technical Field]

[0001] The present invention relates to a mountain crossing tool. [Background technology]

[0002] BACKGROUND ART There is known a crossing device (a portal crane, a lifting device, a hoist) that lifts and moves suspended objects such as switches and rails in railways. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-76074 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to support heavy suspended loads, a certain level of strength is required for the running girders (rail portions) of mountain crossing devices. For this reason, running girders are generally made of metal materials (such as aluminum alloys). On the other hand, further weight reduction of mountain crossing devices is desired from the standpoint of ease of handling during transportation, etc. In response to this, Patent Document 1 discloses a technology for forming the running girders of mountain crossing devices from synthetic resin.

[0005] However, resin runway girders exhibit different characteristics from existing metal (alloy) runway girders in terms of strength and rigidity. In particular, mountain crossing equipment must satisfy both the strength and rigidity requirements that take into account the stress caused by the main load (hanging load) that acts downward on the runway girders when suspended, and the strength requirements that take into account the stress caused by external forces in directions other than the direction in which the hanging load acts.

[0006] Therefore, an object of the present invention is to provide a mountain crossing device equipped with a resin running beam that meets the required strength and rigidity characteristics. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a mountain crossing device equipped with a running girder to which a hanging device for holding a suspended object can be attached. In this mountain crossing device, the running girder includes a laminated structure formed by stacking multiple composite resin layers. The laminated structure includes a first composite resin layer having higher strength and rigidity in the direction of a hanging load acting when the hanging device is attached than in other directions, and a second composite resin layer having higher strength and rigidity in the other direction than the first composite resin layer. [Effects of the Invention]

[0008] According to the present invention, it is possible to realize a resin running girder that ensures the strength and rigidity required for use as a mountain crossing girder. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a mountain climbing tool according to one embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the mountain crossing device. [Figure 3] FIG. 3 is a side view of the mountain crossing device. [Figure 4] FIG. 4 is a cross-sectional view of a main part in FIG. [Figure 5] FIG. 5 is a diagram illustrating the internal structure of the running girder (rail body). DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

[0011] [Structure of Yamakoshiki 10] 1 to 3 show a perspective view, a front view, and a side view of the mountain climbing device 10 according to this embodiment. Also, Fig. 4(A) shows a cross-sectional view of the main part at the connection portion between one support leg 14-1 and each of the rail bodies 12a and 12b in Fig. 2, and Fig. 4(B) shows a cross-sectional view of the main part at the connection portion between the other support leg 14-2 and each of the rail bodies 12a and 12b.

[0012] As shown in the figure, the mountain crossing device 10 of this embodiment comprises a running girder 12 and a pair of support legs 14 (14-1, 14-2) provided at the bottom of both ends of the running girder 12 in the extension direction (X-axis direction in the figure).

[0013] The traveling girder 12 supports a traveling suspension device (equipment) 100 that holds a hanging object M (e.g., a railway rail) to be transported (moved) by the mountain crossing device 10. More specifically, the traveling girder 12 includes a pair of rail bodies 12a, 12b that extend along the direction (X-axis direction) that is the traveling path of the suspension device 100, and a holding member 12c.

[0014] The rail bodies 12a, 12b are arranged facing each other at a predetermined distance to form grooves 16. Each rail body 12a, 12b is formed by molding carbon fiber reinforced plastics (CFRP) into a long rectangular tube (frame-shaped body) with a substantially rectangular cross section and a hollow center. In particular, in this embodiment, the CFRP constituting each rail body 12a, 12b has a laminated structure in which composite resin layers with different properties are stacked. Details of this laminated structure will be described later.

[0015] The holding member 12c is formed in a long rectangular tube shape extending substantially parallel to the rail members 12a and 12b (along the X-axis direction) at an intermediate position relative to the rail members 12a and 12b in the groove portion 16. The holding member 12c may be formed of CFRP, an alloy material, or a combination of CFRP and an alloy material, similar to the rail members 12a and 12b.

[0016] A suspension device 100 that holds a predetermined suspended object M is mounted in a movable manner in the groove 16 between the rail bodies 12a, 12b. In particular, the suspension device 100 can run along the extension direction (X-axis direction) of the running girder 12 while being held by the holding member 12c in the groove 16 (see FIG. 2). In this embodiment, the rail bodies 12a, 12b (each rail body 12a, 12b) that make up the running girder 12 are formed of CFRP.

[0017] A pair of support legs 14-1, 14-2 are swingably attached to the lower part of each rail body 12a, 12b via support leg locking mechanisms 22 (22-1, 22-2). The support leg locking mechanisms 22-1, 22-2 are mainly composed of pin members 22a-1, 22a-2 that straddle and penetrate each rail body 12a, 12b and holding member 12c, and lock plates 22b-1, 22b-2 that are provided at the upper ends of each support leg 14-1, 14-2 and are releasably engaged with these pin members 22a-1, 22a-2 (see particularly Figures 4(A) and 4(B)).

[0018] The pin members 22a-1, 22a-2 are engaged with elongated holes 24-1, 24-2 (see FIG. 2 in particular) provided in the lock plates 22b-1, 22b-2 so as to enable the support legs 14-1, 14-2 to swing (displace) relative to the running girder 12. The elongated holes 24-1, 24-2 are configured in a shape that enables the support legs 14-1, 14-2 to swing (displace) relative to the running girder 12 between a folded position (the position of the support leg 14-1 indicated by the two-dot chain line in FIG. 2) and an open position.

[0019] In particular, each of the elongated holes 24-1, 24-2 is formed in a shape that locks each of the support legs 14-1, 14-2 at the folded position when the support legs reach the folded position, and unlocks each of the support legs 14-1, 14-2 when the support legs are displaced in one direction in the extension direction (X-axis direction) of the running girder 12. Furthermore, each of the elongated holes 24-1, 24-2 is formed in a shape that allows vertical displacement (Z-axis displacement) between the running girder 12 and each of the support legs 14-1, 14-2 when the support legs are displaced in the other direction in the X-axis direction when they have reached the spread position, and by displacing either one of the running girder 12 and each of the support legs 14-1, 14-2 in the vertical direction relative to each other, each of the support legs 14-1, 14-2 is locked in the spread position.

[0020] As a result, when the mountain-crossing device 10 is not in use, each support leg 14-1, 14-2 can be locked in the folded position to increase convenience during transportation and storage, while each support leg 14-1, 14-2 can be positioned and locked in the open position to quickly make the mountain-crossing device 10 usable.

[0021] The lock plates 22b-1 and 22b-2 can be made of metal or various resin materials (for example, the same CFRP as the rail bodies 12a and 12b).

[0022] Furthermore, handles 26 (26-1, 26-2) are provided at both ends of each of the rail bodies 12a, 12b to be gripped by an operator during transportation, etc. The handles 26-1, 26-2 can be made of metal or various resin materials (for example, the same CFRP as the rail bodies 12a, 12b).

[0023] The support legs 14 (14-1, 14-2) each include a bifurcated support leg body 14a (14a-1, 14a-2) formed from an inverted V-shaped tubular member, and an extendable leg portion 14b (14b-1, 14b-2) that is retractably housed inside the support leg body 14a and whose length is adjustable. The extendable leg portion 14b is provided with a plurality of adjustment holes 30 (30-1, 30-2) at predetermined intervals along its length (seven holes on each leg in FIG. 3). The support leg 14 can be adjusted to a desired height by inserting a lock pin 32 (32-1, 32-2) into the adjustment hole 30 on one of the extendable leg portions 14b while aligning an insertion hole on the bottom of the support leg body 14a with the adjustment hole 30 on the extendable leg portion 14b.

[0024] [Internal structure of running girder 12] FIG. 5 is a diagram illustrating the internal structure of the rail body 12a that constitutes the running girder 12. In particular, FIG. 5(A) shows the internal structure of the rail body 12a as viewed from the side (as viewed along the Y-axis direction). Also, FIG. 5(B) shows a cross-sectional view of the internal structure of the rail body 12a (as viewed along the YZ plane). Although not shown, the internal structure of the rail body 12b is also similar to the internal structure of the rail body 12a shown in FIG. 5. For this reason, in the following description, the rail body 12a will be collectively referred to as the "running girder 12."

[0025] As shown in the figures, the running girder 12 of this embodiment has a gap S formed in the center in a cross-sectional view, and is configured as a frame-like body (square tube shape) made of CFRP that extends horizontally (in the X-axis direction) when the mountain climbing device 10 is in use. In particular, the running girder 12 has an upper part Pu that forms an upper surface area (see FIGS. 1 and 2) on which the suspension device 100 is supported, both side parts Ps, Ps that form side areas connected downward (in the negative Z-axis direction) to the upper part Pu, and a lower part Pd that forms a bottom surface area connected downward (in the negative Z-axis direction) to the both side parts Ps, Ps.

[0026] The upper part Pu of the running girder 12 is configured as a structure in which multiple composite resin layers are stacked (hereinafter referred to as "laminated structure LC"). In particular, in the laminated structure LC that constitutes the upper part Pu, a first composite resin layer L1 and a second composite resin layer L2 are stacked in this order from the inside to the outside of the cross section of the running girder 12 (from the negative direction to the positive direction of the Z axis).

[0027] The first composite resin layer L1 and the second composite resin layer L2 are both configured as carbon fiber reinforced resin layers in which a predetermined matrix resin (a thermosetting resin such as an epoxy resin) is applied to carbon fibers, but the first composite resin layer L1 and the second composite resin layer L2 have different fiber structures (the arrangement of the carbon fibers).

[0028] More specifically, the first composite resin layer L1 has a fiber structure (unidirectional fiber structure) including only carbon fibers fu extending (running) along the extension direction (X-axis direction) of the running girder 12. On the other hand, the second composite resin layer L2 has a fiber structure (cross fiber structure) in which carbon fibers fc1, fc2 extending (running) along two different directions cross each other. In particular, the second composite resin layer L2 of this embodiment has a structure in which carbon fibers fc1 extending in a direction (first direction) at an angle of 45° toward the positive direction of the Z-axis with respect to the extension direction (X-axis direction) of the running girder 12 and carbon fibers fc2 extending in a direction (second direction) at an angle of 45° toward the negative direction of the Z-axis cross each other.

[0029] According to the above-described laminated structure LC, the first composite resin layer L1 can ensure the required level of strength (load-bearing capacity) and rigidity (deformation resistance) against the stress caused by the hanging load (the largest load) acting on the running girder 12 when the suspension device 100 holding the suspended load M is installed. In particular, the hanging load acts mainly downward (in the negative Z-axis direction) on the running girder 12, resulting in stress that causes bending deformation (deformation that tries to bend in the negative Z-axis direction). In response to this, at least the first composite resin layer L1 constituting the upper part Pu of the running girder 12 has a unidirectional fiber structure containing only carbon fibers fu running along the extension direction (X-axis direction). Therefore, the strength (load-bearing capacity) and rigidity (deformation resistance) required against the stress caused by the above-described hanging load can be ensured by utilizing the high tensile strength in the running direction of the carbon fibers fu.

[0030] Additionally, in the upper portion Pu of the running girder 12, a second composite resin layer L2 having a cross fiber structure is laminated on a first composite resin layer L1 having a unidirectional fiber structure. This ensures that, when the mountain crossing tool 10 is in use, the required strength (for example, bending strength occurring along the Y-axis direction) can be secured against stress due to external forces in directions other than the downward direction (negative Z-axis direction) in which the above-mentioned hanging load mainly acts. In other words, the second composite resin layer L2 having a cross fiber structure can ensure load-bearing capacity against stress in directions that cannot be covered by the first composite resin layer L1 having a unidirectional fiber structure, which has strong anisotropy in terms of strength and rigidity.

[0031] As described above, by constructing the running girder 12 (especially at least its upper part Pu) as a laminated structure LC combining the first composite resin layer L1 and the second composite resin layer L2, it is possible to reduce the weight while still satisfying the strength and rigidity characteristics required for the use of the mountain crossing tool 10.

[0032] Furthermore, in the laminate structure LC of this embodiment, the thickness D1 of the first composite resin layer L1 is configured to be larger than the thickness D2 of the second composite resin layer L2, which makes it possible to more appropriately adjust the balance between the strength and rigidity against stress caused by a hanging load (a load in the negative Z-axis direction) and the strength against stress caused by external forces acting in other directions.

[0033] In particular, the ratio of the thickness D1 of the first composite resin layer L1 to the thickness D2 of the second composite resin layer L2 is greater than 1 and not greater than 5, preferably in the range of 2 to 4, and more preferably 2.5 to 3.5. This makes it possible to bring the balance between the strength (load-bearing capacity) and rigidity (deformation resistance) against the hanging load and the strength against stresses acting in other directions closer to those made of existing metal materials (aluminum alloys), while reducing the weight of the running beam 12 and thereby making the entire crossing device 10 lighter.

[0034] On the other hand, both side portions Ps, Ps of the runway girder 12 are formed of a single resin layer LS including only the second composite resin layer L2. Here, both side portions Ps, Ps of the runway girder 12 have a certain height (length in the Z-axis direction) and are formed as long plates extending along the X-axis direction. Therefore, the effect of the suspension load acting on both side portions Ps, Ps (force acting in the negative Z-axis direction) is smaller than that on the upper portion Pu, which directly supports the suspension device 100 via a surface. Therefore, by forming both side portions Ps, Ps with a single resin layer LS including only the second composite resin layer L2 having a cross fiber structure, the strength and rigidity characteristics required of the runway girder 12 can be satisfied while the layer thickness (plate thickness) can be reduced, thereby contributing to weight reduction. Alternatively, both side portions Ps, Ps may also be formed of a laminated structure LC combining the first composite resin layer L1 and the second composite resin layer L2, thereby further improving the strength and rigidity of the runway girder 12.

[0035] Furthermore, in this embodiment, the lower portion Pd of the runway girder 12 is also made of the laminated structure LC, similar to the upper portion Pu. In particular, when a hanging load acts on the runway girder 12, stress due to the hanging load also occurs in the lower portion Pd. In response to this, by making the lower portion Pd a laminated structure LC similar to the upper portion Pu (a structure in which the first composite resin layer L1 and the second composite resin layer L2 are arranged in this order from the inside to the outside of the cross section of the runway girder 12), it is possible to more reliably ensure strength and rigidity against the hanging load.

[0036] The internal structure of the running girder 12 shown in Figures 5(A) and 5(B) can be observed (identified) by known destructive or non-destructive analysis methods using FE-SEM, ultrasonic microscopes, etc.

[0037] [An example of the manufacturing process for runway girder 12] 1. Prepreg Base Material Preparation A plain weave or twill weave carbon cross prepreg sheet (hereinafter referred to as "cross sheet (45° / 45°)") and a unidirectional carbon prepreg sheet (hereinafter referred to as "UD sheet") are prepared. The prepared cross sheet (45° / 45°) and UD sheet each have their carbon fiber material impregnated with the same thermosetting resin (e.g., epoxy resin).

[0038] 2. Molding A rectangular core material for forming the runway girder 12 is prepared, and a predetermined number of UD sheets are attached to the core material in the areas corresponding to the upper Pu and lower Pd of the runway girder 12 (rail body 12a or 12b). The UD sheets are attached so that the orientation of the unidirectional fibers (carbon fibers fu) contained in the UD sheets is aligned with the outer periphery of the core material. A predetermined number of cross sheets (45° / 45°) are then wrapped around the entire periphery of the core material to which the UD sheets have been attached. The numbers of UD sheets and cross sheets (45° / 45°) attached to the core material are preferably determined so that the ratio of the thickness D1 of the first composite resin layer L1 to the thickness D2 of the second composite resin layer L2 in the laminated structure LC that constitutes the upper Pu of the completed runway girder 12 is within a desired range (e.g., greater than 1 and less than or equal to 5).

[0039] 3. After bagging the core material with the UD sheet and cross sheet (45° / 45°) applied, place it in a designated heating device (such as an autoclave) and apply pressure and heat to harden the UD sheet and cross sheet (45° / 45°).

[0040] 4. After heating, the core material is removed (de-cored) to obtain a molded product (i.e., the running beam 12).

[0041] By the above manufacturing process, the running girder 12 having the internal structure shown in FIG. 5 can be realized.

[0042] [Action and effect] In this embodiment, a mountain crossing device 10 is provided that includes a traveling girder 12 to which a suspension device 100 that holds a suspended object M can be attached. In this mountain crossing device 10, the traveling girder 12 includes a laminated structure LC in which a plurality of composite resin layers (L1, L2) are stacked. The laminated structure LC includes a first composite resin layer L1 that has higher strength and rigidity in the direction of the suspension load acting when the suspension device 100 is attached (negative direction of the Z axis) than in other directions, and a second composite resin layer L2 that has higher strength and rigidity in the other direction than the first composite resin layer L1.

[0043] This makes it possible to realize a resin-made running girder 12 that satisfies the strength and rigidity characteristics required for the use of the mountain crossing tool 10. More specifically, the first composite resin layer L1 included in the laminated structure LC ensures the strength (load-bearing capacity) and rigidity (deformation resistance) required against stress due to a hanging load acting downward (in the Z-axis direction) when the mountain crossing tool 10 is in use. Furthermore, the second composite resin layer L2 ensures the strength required against stress due to external forces acting in other directions.

[0044] Therefore, even if the running girder 12 is made of resin, it can exhibit the same strength and rigidity characteristics (characteristics required for the mountain crossing device 10) as one made of alloy, while still enjoying the lightweight effect of being made of resin.

[0045] In particular, in the mountain crossing tool 10 according to this embodiment, the first composite resin layer L1 and the second composite resin layer L2 are made of fibers (carbon fibers fu, fc1, fc2) coated with a predetermined matrix resin (e.g., epoxy resin). The first composite resin layer L1 contains fibers (fu) aligned along the extension direction (X-axis direction) of the running girder 12, and the second composite resin layer L2 contains fibers (fc1, fc2) aligned along a direction other than the extension direction (X-axis direction).

[0046] This makes it possible to achieve a first composite resin layer L1 that exhibits strength and rigidity against hanging loads, and a second composite resin layer L2 that exhibits strength against external forces acting in other directions, by the simple method of orienting the fibers in different directions.

[0047] More specifically, the first composite resin layer L1 has a structure (unidirectional fiber structure) in which only fibers (fu) aligned along the extension direction (X-axis direction) are arranged. On the other hand, the second composite resin layer L2 has a structure (cross fiber structure) in which fibers (fc1) aligned along a first direction (45° from the X-axis toward the positive Z-axis direction) non-orthogonal to the extension direction (X-axis direction) and fibers (fc2) aligned along a second direction (45° from the X-axis toward the negative Z-axis direction) non-orthogonal to the extension direction (X-axis direction) and different from the first direction are arranged to cross each other.

[0048] As a result, by using the simple method of combining a first composite resin layer L1 having a unidirectional fiber structure with a second composite resin layer L2 having a cross fiber structure, it is possible to realize a running girder 12 that is lightweight while still meeting the strength and rigidity characteristics required for the use of the mountain crossing tool 10.

[0049] In particular, in the laminated structure LC, a first composite resin layer L1 and a second composite resin layer L2 are laminated in this order from the inside to the outside in the cross section of the running girder 12.

[0050] This makes it possible to realize a specific embodiment of the internal structure of the running girder 12, which allows for weight reduction while satisfying the strength and rigidity characteristics required for the use of the mountain crossing device 10. Furthermore, by arranging the second composite resin layer L2 having a cross fiber structure in the outer region of the cross section of the running girder 12 (the region close to the suspension device 100 to which it is attached), it is possible to more reliably ensure the strength of the running girder 12 against external forces (stresses) that cause bending deformation along the Y-axis direction.

[0051] Although the embodiments of the present invention have been described above, these are merely examples and are not intended to limit the technical scope of the present invention.

[0052] For example, the specific structure (particularly, fiber structure) constituting the first composite resin layer L1 and / or the second composite resin layer L2 of the laminate structure LC is not limited to the aspect shown in the above embodiment. In particular, for the first composite resin layer L1, any structure (particularly, fiber structure) can be adopted as long as it satisfies the condition that the strength and rigidity in the direction of the suspension load acting when the suspension device 100 is installed is higher than in other directions. Also, for the second composite resin layer L2, any structure (particularly, fiber structure) can be adopted as long as it satisfies the condition that the strength and rigidity in other directions are higher than those of the first composite resin layer L1.

[0053] Furthermore, taking into consideration differences in the specifications (such as the dimensions of each part) and usage environment of the runway girder 12, the laminated structure LC may be formed by combining one or more first composite resin layers L1 and one or more second composite resin layers L2. For example, in the above embodiment, a laminated structure LC in which one first composite resin layer L1 and one second composite resin layer L2 are laminated in order from the inside to the outside of the cross section of the runway girder 12 has been described. However, instead of this, a laminated structure LC in which a second composite resin layer L2, the first composite resin layer L1, and the second composite resin layer L2 are laminated in order from the inside to the outside of the cross section of the runway girder 12 may be employed. By employing a laminated structure LC configured in this manner, the durability of the runway girder 12 against unintended external forces can be improved.

[0054] Furthermore, the specific shape (plan view shape, side view shape, and / or cross-sectional shape) of the runway girder 12 is not limited to the form shown in the above embodiment. For example, a structure that increases strength and rigidity may be adopted by providing a predetermined filler material (such as a foam material) in the gap S of the runway girder 12 shown in FIG. 5(B). In particular, in this case, by leaving the core material used in manufacturing the runway girder 12 as a filler material without removing it, a runway girder 12 with increased strength and rigidity can be realized using a simple manufacturing process. [Explanation of symbols]

[0055] 10 Yamakoshiki 12 running digits 12a, 12b Rail body 14 Support legs 14a Support script 14b Telescopic legs 16 Groove 22 Support leg locking mechanism 24 long hole 26 Handle 30 Adjustment hole 32 Lock pin 100 Hanging device L1 1st composite resin layer L2 2nd composite resin layer LC laminated structure LS Single resin layer Pu upper Ps,Ps both sides

Claims

1. A mountain crossing device equipped with a traveling beam to which a hanging device for holding a hanging object can be attached, The running girder includes a laminated structure in which a plurality of composite resin layers are laminated, The laminated structure is The suspension device is characterized by including a first composite resin layer having a strength and rigidity higher in a direction of a suspension load acting when the suspension device is installed than in other directions, and a second composite resin layer having a strength and rigidity higher in the other direction than the first composite resin layer. Yamakoshi ware.

2. The mountain-crossing tool according to claim 1, the first composite resin layer and the second composite resin layer are each made of fibers to which a predetermined matrix resin is applied, The first composite resin layer includes the fibers along the extension direction of the running girder, The second composite resin layer includes the fibers extending in a direction other than the extending direction. Yamakoshi ware.

3. The mountain-crossing tool according to claim 2, the first composite resin layer has a structure in which only the fibers are arranged along the extending direction, The second composite resin layer has a structure in which the fibers extending along a first direction non-orthogonal to the extending direction and the fibers extending along a second direction non-orthogonal to the extending direction and different from the first direction are arranged to intersect. Yamakoshi ware.

4. The mountain-crossing tool according to any one of claims 1 to 3, In the laminated structure, The first composite resin layer and the second composite resin layer are laminated in order from the inside to the outside in the cross section of the running girder. Yamakoshi ware.

Images