Sliding material and bearing device

Abstract

To provide a sliding material capable of exhibiting stable sliding performance over a long period of time, and a bearing device using the sliding material.SOLUTION: A sliding material 35 is composed of an upper shoe 10 and a lower shoe 20 arranged at opposing portions of an upper structure and a lower structure, and constitutes an upper shoe sliding surface 10a, which is a sliding surface of the upper shoe 10 in a bearing device in which sliding surfaces 10a, 20a at opposing portions of the upper shoe 10 and the lower shoe 20 slide against each other. The sliding member comprises: a storage member 36 having a storage part 38 that stores lubricant 41 to improve slidability of the sliding surface; and a flexible transparent member 37 that constitutes the upper shoe sliding surface 10a, and has a transparent hole 42 that allows the lubricant 41 stored in the storage part 38 to pass through the upper shoe sliding surface 10a side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bearing device that is interposed between a lower structure and an upper structure, for example, to support the upper structure with the lower structure, and to a sliding member that constitutes the sliding surface of the bearing device. [Background technology]

[0002] BACKGROUND ART Conventionally, there have been seismic isolation structures equipped with bearing devices that provide movable support in structures where vibrations or relative movement occur, such as buildings, bridges, or connecting parts that connect fixed structures. Such a bearing device in a seismic isolation structure is arranged between a supported structure such as an upper structure and a supporting structure such as a lower structure, and is configured to support the structure by sliding on the boundary surface between the upper shoe fixed to the supported structure and the lower shoe fixed to the supporting structure, i.e., the sliding surface, allowing for in-plane displacement at the boundary surface; the sliding of the upper shoe and the lower shoe on the sliding surface can provide a seismic isolation effect by reducing the vibrations transmitted to the supported structure.

[0003] As one such bearing device, for example, Patent Document 1 proposes a bearing device in which a sliding plate made of synthetic resin with recesses (dimples) for storing lubricant slides against a sliding plate made of synthetic resin.The lubricant stored in the recesses formed in the sliding surfaces is interposed throughout the space between the sliding surfaces, which reduces the coefficient of friction compared to when the sliding surfaces of the sliding materials slide directly against each other, improving sliding performance and resulting in improved seismic isolation effects.

[0004] However, in the case of the bearing device of Patent Document 1 mentioned above, when the sliding distance becomes long, the sliding members slide against each other, causing the surfaces of the sliding members to wear, deforming the recesses so that they become shallower, and there is a risk that the lubricant will no longer be able to be stored. When the lubricant can no longer be stored, the effect of reducing the friction coefficient on the sliding surface decreases, causing the sliding members themselves to wear, further deteriorating the sliding performance, and making it difficult to achieve stable sliding performance over the long term. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-132757 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, an object of the present invention is to provide a sliding material that can exhibit stable sliding performance over a long period of time, and a bearing device that uses the sliding material. [Means for solving the problem]

[0007] This invention is a sliding material that constitutes an upper shoe sliding surface, which is the sliding surface of the upper shoe in a bearing device that is composed of an upper shoe and a lower shoe arranged at opposing portions of an upper structure and a lower structure, and in which the sliding surfaces at the opposing portions of the upper shoe and the lower shoe slide against each other, and is characterized by comprising a storage member having a storage portion that stores a lubricant that improves the sliding properties of the sliding surface, and a flexible transparent member that constitutes the upper shoe sliding surface and has a transparent hole that allows the lubricant stored in the storage portion to pass through to the upper shoe sliding surface side.

[0008] The present invention also provides a bearing device that is composed of an upper shoe and a lower shoe that are arranged at opposing portions of an upper structure and a lower structure, and in which the sliding surfaces of the upper shoe and the lower shoe slide against each other at the opposing portions, wherein the upper shoe is provided with a sliding material that constitutes the upper shoe sliding surface, which is the sliding surface of the upper shoe, and the sliding material is provided with a storage member having a storage portion that stores a lubricant that improves the sliding properties of the sliding surface, and a flexible transparent member that constitutes the upper shoe sliding surface and has a transparent hole that allows the lubricant stored in the storage portion to pass through to the upper shoe sliding surface side, and the lubricant is stored in the storage portion.

[0009] As long as the storage section is capable of storing the lubricant, it may be, for example, a through hole that penetrates vertically, or a recess (dimple) in the storage member that is recessed from the surface (lower surface) on the lower shoe side to the upper shoe side (upward).

[0010] The storage member and the transparent member may be joined to each other, or the storage member may simply be placed on the transparent member without being joined to each other.If they are joined to each other, they may be bonded together, for example, with an adhesive, or the end of the transparent member may be bent toward the end of the storage member and fastened with screws.

[0011] It is preferable that the size relationship between the storage section of the storage member and the transparent hole in the transparent member covering the storage section is such that when the storage section is covered from below with the transparent member, the lubricant filled in the storage section does not leak out and the lubricant impregnated in the transparent member is supplied to the side of the transparent member in an appropriate amount so that it is not depleted. The transmitting member may also be formed of a soft material having many pores, such as woven fabric, mesh fabric, nonwoven fabric, or a combination of these, that is, fiber fabric, or foamed urethane such as sponge.

[0012] According to this invention, the lubricant can be stably supplied to the sliding surface, so that stable sliding performance can be exhibited over a long period of time. In more detail, the bearing device is composed of an upper shoe and a lower shoe arranged at opposing portions of an upper structure and a lower structure, and the sliding surfaces of the opposing portions of the upper shoe and the lower shoe slide against each other. The sliding material that constitutes the upper shoe sliding surface, which is the sliding surface of the upper shoe, is provided with a storage member having a storage portion that stores a lubricant that improves the sliding properties of the sliding surface, and a transparent member that constitutes the upper shoe sliding surface and has a transmission hole that allows the lubricant stored in the storage portion to pass through. Therefore, the lubricant stored in the storage portion of the storage member is supplied to the upper shoe sliding surface through the transmission hole of the transparent member.

[0013] Therefore, when the upper structure and the lower structure move relative to each other in the horizontal direction, the upper shoe sliding surface of the upper shoe and the lower shoe sliding surface of the lower shoe slide against each other, and a lubricant that improves sliding properties can be supplied to the sliding points, thereby improving the sliding properties of the upper shoe and the lower shoe.

[0014] Furthermore, since the transparent member that constitutes the upper shoe sliding surface is flexible, it deforms according to the installation state of the lower shoe relative to the lower shoe sliding surface, and lubricant can be further supplied to the sliding points between the upper shoe sliding surface and the lower shoe sliding surface.

[0015] Furthermore, the sliding surface can be easily adjusted to have a desired sliding property. Specifically, since the storage member has a plurality of storage sections arranged at appropriate intervals, the amount of lubricant supplied to the sliding portions through the transmission holes of the transmission member can be adjusted by adjusting the size of the storage sections and the intervals between the storage sections, which makes it possible to easily adjust the slidability of the upper shoe and the lower shoe to the desired level.

[0016] As an aspect of the present invention, the transparent member may be a fabric having the transparent holes. According to this invention, during an earthquake, the size and shape of the through hole of the transparent member are deformed as the sliding material repeatedly moves horizontally relative to the sliding surface while the location where the vertical load from the storage member acts fluctuates.

[0017] Therefore, the lubricant stored in the storage portion of the storage member is actively transferred to the transmitting member side and impregnated therein. Therefore, the lubricant can be stably supplied to the sliding surface, and stable sliding performance can be exhibited over a long period of time.

[0018] The fabric constituting the transmission member is preferably a woven fabric, and the transmission holes are preferably formed along the weave of the fabric. According to this invention, the repeated spreading and agglomeration of the mesh of the fabric actively promotes the migration of the lubricant stored in the storage section of the storage member to the permeable member and impregnation thereof, thereby enabling the lubricant to be stably supplied to the sliding surface, thereby achieving stable sliding performance over a long period of time.

[0019] The storage member may be a metal plate having the storage portion formed of a through-hole penetrating in the thickness direction. According to this invention, the storage member is made of a highly rigid metal plate, so that the flexible cloth does not lose its shape even when it repeatedly moves horizontally while sliding against the sliding surface, and the cloth can be firmly supported.

[0020] The sliding member may be circular in bottom view, and the storage section may be arranged more densely in an outer region than in an inner region in bottom view. The storage member may not only be configured so that the occupancy rate of the storage section relative to the overlapping portion with the sliding material on the bottom surface of the storage member is larger in the outer region than in the inner region of the overlapping portion, but may also be configured to set the filling rate of the lubricant to be filled in the storage section in each of the inner region and the outer region.

[0021] According to this invention, when the upper structure repeatedly moves relative to the lower structure, the sliding distance of the transparent member against the sliding surface becomes longer in the outer region of the overlapping portion when viewed from the bottom than in the inner region, and therefore lubricant is more likely to be consumed.Therefore, as described above, by setting the occupancy rate of the storage portion of the storage member so that the outer region of the overlapping portion is larger than the inner region of the overlapping portion when viewed from the bottom, lubricant can be stably supplied even to the outer region where lubricant is likely to be insufficient.

[0022] On the other hand, by configuring the transparent member so that the occupancy rate of the storage section is smaller in the inner region than in the outer region when viewed from the bottom, the transparent member can firmly support the vertical load received from the storage member. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a sliding material that can exhibit stable sliding performance over a long period of time, and a bearing device that uses the sliding material. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] Enlarged view of a portion of Figure 1. [Figure 4] (a) is an enlarged cross-sectional view taken along line AA in Figure 1, and (b) is an enlarged view of a portion of (a). [Figure 5] FIG. 10 is a cross-sectional view illustrating another embodiment of the bearing device. [Figure 6] FIG. 5 is an enlarged cross-sectional view showing a bearing device according to another embodiment, corresponding to FIG. 4(a). DETAILED DESCRIPTION OF THE INVENTION

[0025] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows a cross-sectional view of one side of the bearing device 1, and Fig. 2 shows an exploded perspective view of the sliding part 30 of the upper shoe 10 as seen from the bottom side. Furthermore, Fig. 3 shows a cross-sectional view of part of the slide bearing 35 of the bearing device 1 and its surrounding area. Fig. 4(a) shows an enlarged cross-sectional view of the main part taken along line AA in Fig. 1, and Fig. 4(b) shows an enlarged view of a part of Fig. 4(a).

[0026] The bearing device 1 is a seismic isolation device that is arranged between an upper structure and a lower structure (not shown) to form a seismic isolation structure, and is composed of an upper shoe 10 fixed to the upper structure and a lower shoe 20 fixed to the lower structure.

[0027] The bearing device 1 supports the upper and lower structures so that they can be displaced in the in-plane direction of the boundary surface, i.e., along the sliding surface, by sliding between the upper shoe sliding surface 10a, which is the boundary surface of the upper shoe 10, and the lower shoe sliding surface 20a, which is the boundary surface of the lower shoe 20. Therefore, it is possible to absorb vibration energy caused by earthquakes, strong winds, etc., for example, and create a seismic isolation structure. In addition, such a bearing device 1 is used in conjunction with a laminated rubber bearing device (not shown) in which the laminated rubber can elastically deform to follow the relative displacement between the upper shoe 10 and the lower shoe 20 and return to its original position.

[0028] 1, the lower shoe 20 is composed of a sole plate 21 fixed to the upper surface of the lower structure, and a slide plate 22 attached to the upper surface of the sole plate 21. The upper surface of the slide plate 22 of the lower shoe 20 forms a lower shoe sliding surface 20a that slides against an upper shoe sliding surface 10a of the upper shoe 10, which will be described later. The slide plate 22 may be composed of a stainless steel plate.

[0029] The upper shoe 10 is provided with a steel base pot 11 that is fixed to the bottom surface of the upper structure, and a sliding part 30 that is circular in plan view and is located in the mounting recess 11a in the center of the bottom side of the base pot 11. The mounting recess 11a is a cylindrical space that is open at the bottom, that is, that is open toward the lower shoe 20.

[0030] The sliding part 30 mounted in the mounting recess 11a of the base pot 11 is composed of, from top to bottom, an elastic plate 31, a shim 32, a seal ring 33, a piston 34 and a slide bearing 35, as shown in Figures 1 and 2. The elastic plate 31 is a rubber plate having a circular shape in plan view and having approximately the same diameter as the inner diameter of the cylindrically formed mounting recess 11a.

[0031] The shim 32 has a circular shape in plan view and has the same diameter as the elastic plate 31, and is a thin plate made of a fluororesin such as polytetrafluoroethylene (PTFE). The seal ring 33 is a circular ring with a trapezoidal cross section, in which the outer side is a vertical surface and the inner side is an inclined surface that slopes downward toward the outer side, and its outer diameter is the same as that of the elastic plate 31 and the shim 32.

[0032] The piston 34 is made of stainless steel and has a generally cylindrical shape, with a circular recess 34a formed along the outer periphery of the upper surface to allow the seal ring 33 to fit in. The bottom surface of the piston 34 is provided with a recessed mounting portion 34b to which the slide bearing 35 is attached.

[0033] In this embodiment, the slide bearing 35 is attached to the mounting portion 34b, but a bearing holder may be installed on the mounting portion 34b and the slide bearing 35 may be attached via the bearing holder. Also, the mounting portion 34b may not be provided on the bottom surface of the piston 34, and the slide bearing 35 may be directly adhesively fixed to the bottom surface of the piston 34. Furthermore, the shim 32 may be omitted.

[0034] The slide bearing 35 is a plate material having a circular shape in a plan view, and a bottom surface 35a of the slide bearing 35 serves as an upper shoe sliding surface 10a that slides against a lower shoe sliding surface 20a, which is the surface of the slide plate 22 of the lower shoe 20.

[0035] Next, the slide bearing 35 will be described in more detail. 1, 2, and 3, the slide bearing 35 includes a perforated metal 36 as a storage member and a fabric 37 as a permeable member provided below the perforated metal 36. The slide bearing 35 is arranged such that the perforated metal 36 and the fabric 37 are stacked on each other on the upper and lower sides. The bottom surface 36a of the perforated metal 36 and the upper surface of the fabric 37 are bonded to each other in a surface-to-surface contact state via an adhesive.

[0036] The perforated metal 36 is a circular metal steel plate having approximately the same diameter as the circular shape of the slide bearing 35 in a plan view, and is made of, for example, stainless steel. A plurality of storage holes 38 for storing lubricant 41 are formed through the perforated metal 36 in the plate thickness direction. A plurality of storage holes 38 are arranged over the entire bottom surface 36a of the perforated metal 36.

[0037] Specifically, as shown in Figures 4(a) and (b), the storage holes 38 are arranged in a staggered pattern across the entire bottom surface 36a of the perforated metal 36, such that the three closest storage holes form an equilateral triangle. In other words, when the multiple storage holes 38 are arranged in rows, the storage holes 38 in adjacent rows are not adjacent to each other and are arranged between the storage holes 38 in the alignment direction, resulting in a staggered or zigzag arrangement of the storage holes 38. Note that the angle α in Figure 4(a) is set to 60 degrees. Furthermore, the multiple storage holes 38 are all formed in a circular shape in a plan view, i.e., a round hole shape, and are formed with the same diameter.

[0038] A plurality of storage holes 38 are arranged in a staggered pattern on the bottom surface 36a of the punched metal 36. As shown in FIG. 4(b), if the pitch of the storage holes 38 is P and the hole diameter is D, the occupancy rate (A [%]) of the storage holes 38 on the surface of the bottom surface 36a of the punched metal 36 facing the fabric 37, that is, the opening rate (A [%]) of the storage holes 38 on the facing surface, is 90.6×D 2 ÷P 2 It can be calculated as follows.

[0039] However, the shape of the storage holes 38 is not limited to a perfect circle in plan view as long as it is a shape that can store the lubricant 41, and may be formed, for example, in the shape of an elongated hole, an ellipse, or a polygonal shape such as a triangle or a rectangle, and at least one of the storage holes 38 may be formed in a different shape or size. Furthermore, the pitch of the multiple storage holes 38 is not limited to the above-described pitch (P) and may be other pitches. Furthermore, the multiple storage holes 38 may be arranged in a different pattern from a staggered pattern, and may be arranged at different intervals between adjacent storage holes 38 rather than being arranged at a fixed pitch.

[0040] Here, even if the material and size of the slide bearing 35 are the same, the coefficient of friction changes by changing the occupancy rate (A) of the storage holes 38 in the punched metal 36, that is, for example, the number, size, pitch, or arrangement of the storage holes 38.

[0041] Specifically, in the slide bearing 35 of this embodiment, the coefficient of friction decreases as the occupancy rate (A) of the reservoir holes 38 in the perforated metal 36 increases, and vice versa. Therefore, the coefficient of friction can be easily adjusted in accordance with the occupancy rate (A) of the reservoir holes 38 in the perforated metal 36.

[0042] 1 and 3, a plurality of reservoir holes 38 formed in the perforated metal 36 are filled with a lubricant 41. The lubricant 41 stored in the reservoir holes 38 is a low-friction lubricant 41, such as silicone oil, for improving the sliding properties of the upper shoe sliding surface 10a of the slide bearing 35. Silicon oil is preferable because it does not impair the adhesiveness of the adhesive that bonds the perforated metal 36 and the fabric 37 together.

[0043] The fabric 37 serving as the transparent member is a woven fabric made of warp and weft threads made of aramid fiber, and is flexible as a whole and formed into a circular shape having approximately the same diameter as the circular shape of the slide bearing 35 in a plan view. The bottom surface of the fabric 37 forms the upper shoe sliding surface 10a.

[0044] The fabric 37 has numerous weaves 42 formed of warp and weft threads (not shown) throughout, and the weaves 42 penetrate the thickness of the fabric 37, allowing the lubricant 41 stored in the storage hole 38 to permeate, i.e., migrate, to the upper shoe sliding surface side.

[0045] When the punched metal 36 and the fabric 37 are stacked on top of each other, the weave 42 communicates with the storage holes 38 of the punched metal 36 in the vertical direction, but has a smaller diameter than the storage holes 38 so that the lubricant 41 filled in the storage holes 38 does not migrate more than necessary toward the fabric 37.

[0046] Furthermore, by positioning the fabric 37 having a weave 42 that is smaller in diameter than the storage hole 38 so that its upper surface is in contact with the bottom surface 36a of the punched metal 36, the storage hole 38 that opens downward in the bottom surface 36a of the punched metal 36 can be covered from below by the fabric 37.

[0047] That is, although the fabric 37 has numerous weaves 42, when the fabric 37 is positioned so that its upper surface is in contact with the bottom surface 36a of the punched metal 36, it also functions as a lid that closes the downward opening of the storage hole 38 so that the lubricant 41 stored in the storage hole 38 does not flow downward more than necessary.

[0048] As a result, the lubricant 41 is retained in the retention holes 38 of the punched metal 36 for a long period of time, and can be stably supplied from the retention holes 38 through the weave 42 to the fabric 37 in an appropriate amount of impregnation.

[0049] Furthermore, the above-mentioned punched metal 36 is arranged in close contact with the entire fabric 37 from above when the lower shoe 20 movably supports the upper shoe 10, and takes advantage of its high rigidity to support the flexible fabric 37 so that it does not lose its shape even when the upper shoe sliding surface 10a and the lower shoe sliding surface 20a slide against each other.

[0050] On the other hand, even when the perforated metal 36 is pressed against the fabric 37, the lubricant 41 filled in the reservoir holes 38 of the perforated metal 36 is transferred to the fabric 37, and the fabric 37 is kept impregnated with the lubricant. In detail, the portion of the fabric 37 corresponding to the storage hole 38 enters the storage hole 38 of the punched metal 36 from the lower opening, and the lubricant 41 stored in the storage hole 38 of the punched metal 36 migrates to the fabric 37 side through the weave 42 of the fabric 37, part of which has entered the storage hole 38, and impregnates the fabric 37.

[0051] During an earthquake, the repeated horizontal movement of slide bearing 35 relative to the sliding surface of fabric 37 causes numerous woven patterns 42 formed by the mesh structure to repeatedly spread and aggregate. As a result, lubricant 41 stored in reservoir holes 38 of perforated metal 36 actively migrates toward fabric 37, and fabric 37 is maintained in a state where it is impregnated with lubricant 41.

[0052] The slide bearing 35 provided in the bearing device 1 of this embodiment described above can achieve the following effects. As shown in Figures 1 to 3, the slide bearing 35 of the present embodiment described above is composed of an upper shoe 10 and a lower shoe 20 arranged in opposing portions of an upper structure and a lower structure, and the slide bearing 35 constituting the upper shoe sliding surface 10a, which is the sliding surface of the upper shoe 10 in a bearing device in which the sliding surfaces of the upper shoe 10 and the lower shoe 20 slide against each other at the opposing portions, is provided with a perforated metal 36 having storage holes 38 for storing lubricant 41 that improves the sliding properties of the sliding surface, and a fabric 37 that constitutes the upper shoe sliding surface 10a and has a weave 42 that allows the lubricant 41 stored in the storage holes 38 to pass through, so that the lubricant 41 stored in the storage holes 38 of the perforated metal 36 is supplied to the upper shoe sliding surface 10a through the weave 42 of the fabric 37.

[0053] Therefore, when the upper structure and the lower structure move relative to each other in the horizontal direction, the upper shoe sliding surface 10a of the upper shoe 10 and the lower shoe sliding surface 20a of the lower shoe 20 slide against each other, and a lubricant 41 that improves the sliding properties can be supplied to the sliding points, thereby improving the sliding properties of the upper shoe 10 and the lower shoe 20.

[0054] Furthermore, since the fabric 37 constituting the upper shoe sliding surface 10a is flexible, it deforms according to the installation state of the lower shoe 20 with respect to the lower shoe sliding surface 20a, and in the sliding state as described above, the lubricant 41 can be further supplied to the sliding points between the upper shoe sliding surface 10a and the lower shoe sliding surface 20a.

[0055] Therefore, as described above, the lubricant 41 stored in the storage holes 38 of the perforated metal 36 migrates to the fabric 37 side, so the coefficient of friction of the slide bearing 35 can be significantly reduced over the long term compared to a case in which the permeable member, the fabric 37 alone, is impregnated with lubricant 41 without the perforated metal 36. Furthermore, wear of the fabric 37 is reduced, so its durability can be improved, and the characteristics of a low-wear sliding bearing can be maintained over the long term.

[0056] Furthermore, since a plurality of reservoir holes 38 are arranged at appropriate intervals in the perforated metal 36, the amount of lubricant 41 supplied to the sliding locations through the weave 42 of the fabric 37 can be adjusted by adjusting the size of the reservoir holes 38 and the intervals between the reservoir holes 38. Therefore, the slidability between the upper shoe 10 and the lower shoe 20 can be easily adjusted to a desired slidability.

[0057] Furthermore, the friction coefficient of the slide bearing 35 can be adjusted according to the occupancy rate (A) of the storage holes 38 in the punched metal 36 rather than according to differences in material or size, so it is possible to standardize the material and size while offering a wide range of products with different friction coefficients.

[0058] For example, when a base isolation structure is adopted for a large building with a small aspect ratio, such as a factory or logistics warehouse, designs are often seen in which supports are placed under the columns in the center of the building. In such large buildings with a small aspect ratio, the vertical axial forces acting on multiple supports are often approximately the same, so it may be possible to standardize the size of the supports.

[0059] However, slide bearings have traditionally been available in a wide variety of lineups with different friction coefficients depending on the material and size, making it difficult to standardize the material and size.

[0060] In contrast, with the slide bearing 35 of this embodiment, the friction coefficient can be adjusted according to differences in the occupancy rate (A) of the storage holes 38 in the punched metal 36, making it possible to offer a wide range of products with different friction coefficients while sharing the same material and size.

[0061] In addition, design, construction and maintenance are easier than when adjusting the friction coefficient using bearings of different materials and sizes. In detail, as described above, the slide bearing 35 has a simple relationship in which the friction coefficient decreases as the occupancy rate (A) of the storage holes 38 in the punched metal 36 increases, and increases as the occupancy rate (A) decreases. Therefore, a complex structure is not required, and the friction coefficient can be easily adjusted in accordance with the occupancy rate (A) of the storage holes 38 in the punched metal 36.

[0062] Furthermore, as described above, the permeable member is fabric 37 as a woven fabric, and has weave patterns 42 as numerous permeable holes. Therefore, during an earthquake, the location where the vertical load from perforated metal 36 acts on fabric 37 fluctuates and slide bearing 35 repeatedly moves horizontally relative to the sliding surface, causing the mesh of the woven fabric to repeatedly expand and aggregate, which actively causes lubricant 41 stored in storage holes 38 of perforated metal 36 to migrate to and impregnate fabric 37. This allows the lubricant 41 to be supplied stably to the sliding surface, thereby providing stable sliding performance over a long period of time.

[0063] As described above, the punched metal 36 is a highly rigid metal plate having storage holes 38 formed of through holes that penetrate in the thickness direction, and therefore the flexible fabric 37 does not lose its shape even when it repeatedly moves horizontally while sliding against the sliding surface, and can firmly support the fabric 37.

[0064] Furthermore, by using the punched metal 36, which is widely available as a ready-made product, it is possible to reduce the cost of the punched metal 36. Furthermore, by filling the storage hole 38 with the lubricant 41, the lubricant 41 can be securely stored.

[0065] Furthermore, in the punched metal 36 of the above-described embodiment, all of the plurality of storage holes 38 are filled with the lubricant 41, but this is not limited thereto. For example, the lubricant 41 may be filled into at least one of the storage holes 38, for example, by filling every other storage hole 38 in the arrangement direction of the plurality of storage holes 38, as shown in FIG. Furthermore, the amount of lubricant 41 filled into the reservoir holes 38 is not limited to being filled to the full, and each reservoir hole 38 may be filled with a different amount.

[0066] The present invention is not limited to the configurations of the above-described embodiments, and many other embodiments can be obtained. In the above-described embodiment, the plurality of storage holes 38 are arranged on the bottom surface 36a so that the occupancy rate (A) of the storage holes 38 in the punched metal 36 is uniform over the entire bottom surface 36a. However, this is not limited to this. For example, as shown in FIG. 6, the punched metal 36A may be circular when viewed from the bottom, and the storage holes 38 may be arranged more densely in an outer region 36Ab corresponding to the radially outer side than in an inner region 36Aa corresponding to the radially inner side, i.e., the radial center side.

[0067] As a result, when the upper structure repeatedly moves relative to the lower structure, the sliding distance of the fabric 37 against the lower shoe sliding surface 20a becomes longer in the outer region 36Ab than in the inner region 36Aa when viewed from the bottom, and therefore lubricant 41 is required.Therefore, as described above, by setting the occupancy rate (A) of the storage holes 38 of the punched metal 36 to be larger in the outer region 36Ab than in the inner region 36Aa of the overlapping portion, it is possible to stably supply lubricant 41 even to the outer region 36Ab, which is prone to running short of lubricant 41.

[0068] On the other hand, by setting the occupancy rate (A) of the storage holes 38 of the perforated metal 36 so that the outer region 36Ab is smaller than the inner region 36Aa of the overlapping portion, the fabric 37 has a larger contact area with the perforated metal 36, and therefore the flexible fabric 37 can be firmly supported by the perforated metal 36 so that it does not lose its shape even when it repeatedly moves horizontally while sliding against the lower shoe sliding surface 20a.

[0069] As long as the storage hole 38 is capable of storing the lubricant 41, it is not limited to a through hole that penetrates the punched metal 36 in the vertical direction as described above, but may also be a recess in the storage member with a concave cross-section that is recessed from the surface (lower surface) on the side of the lower shoe 20 toward the side (upward) of the upper shoe 10, i.e., a dimple. The fabric 37 may be a knitted fabric or may be a bundled fabric without being twisted.

[0070] As described above, in correspondence between the configuration of the present invention and the aforementioned embodiment, the sliding member of the present invention corresponds to the slide bearing 35 of the aforementioned embodiment, Similarly, The storage member, i.e., the metal plate material, corresponds to the punched metal 36, 36A, The transparent member corresponds to the fabric 37; The through-hole corresponds to the storage hole 38, The through holes correspond to the weave patterns 42 . [Explanation of symbols]

[0071] 1...Support device 10...Upper foot 10a...Upper shoe sliding surface 20…Shimotsutsu 20a…Lower shoe sliding surface 35...Slide bearing 36, 36A... Punching metal 36Aa…Inner area 36Ab…outer area 37...Fabric 38...Reservoir hole 41...Lubricant 42…weave

Claims

1. A sliding member that constitutes an upper shoe sliding surface, which is the sliding surface of the upper shoe, in a bearing device that is composed of an upper shoe and a lower shoe disposed in opposing portions of an upper structure and a lower structure, and in which the sliding surfaces of the opposing portions of the upper shoe and the lower shoe slide against each other; a reservoir member having a reservoir portion for storing a lubricant that improves the sliding properties of the sliding surface; a flexible permeable member that constitutes the upper shoe sliding surface and has a permeable hole that allows the lubricant stored in the storage section to permeate to the upper shoe sliding surface side; Sliding material.

2. The transparent member is a fabric having the transparent holes. The sliding material according to claim 1.

3. the cloth constituting the transparent member is a woven fabric, The through holes are the weave of the fabric. The sliding material according to claim 2.

4. The storage member is a metal plate having the storage portion formed of a through hole penetrating in the thickness direction. A sliding member according to any one of claims 1 to 3.

5. The sliding member is circular in bottom view, The storage section has an outer region more densely arranged than an inner region when viewed from the bottom. The sliding material according to claim 1.

6. A bearing device comprising an upper shoe and a lower shoe disposed at opposing portions of an upper structure and a lower structure, wherein the sliding surfaces at the opposing portions of the upper shoe and the lower shoe slide against each other, The upper shoe is provided with a sliding member that constitutes an upper shoe sliding surface, which is the sliding surface of the upper shoe, The sliding material is a reservoir member having a reservoir portion for storing a lubricant that improves the sliding properties of the sliding surface; a flexible transparent member that constitutes the upper shoe sliding surface and has a transparent hole that allows the lubricant stored in the storage section to pass through to the upper shoe sliding surface side, The lubricant is stored in the storage section. Bearing device.

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