How to make shoes

Abstract

The present invention provides an upper or lower shoe, a sliding bearing, and a method for manufacturing an upper or lower shoe that can improve durability. [Solution] The shoe 30 is an upper or lower shoe provided by a sliding support 100 positioned between an upper structure U and a lower structure L facing the upper structure U, and the upper or lower shoe comprises a plate-shaped member 300 and a sliding surface S2 on the plate-shaped member 300, with no gap between the sliding surface S2 and the plate-shaped member 300.

Description

Technical Field

[0007] , ,

[0001] The present disclosure relates to a method for manufacturing a sliding bearing or a bearing with a sliding surface.

Background Art

[0002] In order to suppress the propagation of vibrations due to earthquakes to buildings, sliding seismic isolation devices may be used (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a sliding bearing, it is desired to improve the durability of the sliding surface.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a method for manufacturing a sliding bearing or a bearing with a sliding surface that can improve durability.

Means for Solving the Problems

[0006] <1> The bearing according to Aspect 1 of the present disclosure is an upper platen or a lower platen provided in a sliding bearing disposed between an upper structure and a lower structure facing the upper structure. The platen includes a plate-shaped member or a plate-shaped member having a curved surface, and a sliding surface on the plate-shaped member. There is no gap between the sliding surface and the plate-shaped member.

Effects of the Invention

[0007] According to the present disclosure, it is possible to provide a method for manufacturing a sliding bearing or a bearing with a sliding surface that can improve durability. [Brief explanation of the drawing]

[0008] [Figure 1] This is a cross-sectional view showing the configuration of a sliding bearing including a shoe according to an embodiment. [Figure 2] This figure shows the state in which the spherical seat and the upper shoe have moved relative to each other in a substantially horizontal direction in the sliding bearing shown in Figure 1. [Figure 3] This is a cross-sectional view illustrating the spraying process and the heating process in the method for manufacturing the upper shoe according to the embodiment. [Figure 4] This is a plan view showing the state after the spraying and heating steps in the method for manufacturing the upper shoe according to the embodiment. [Modes for carrying out the invention]

[0009] The upper shoe according to one embodiment of this disclosure will be described below with reference to the drawings. The upper shoe 30 according to this embodiment is provided on the sliding support 100. Below, we will first explain the sliding bearing 100.

[0010] (Regarding the sliding bearing 100) Figure 1 is a cross-sectional view showing the configuration of the sliding bearing 100 according to this embodiment. The sliding bearing 100 shown in Figure 1 is positioned between the superstructure U, which is a building such as a high-rise building or bridge, and the substructure L, which is a foundation structure installed in the ground. The superstructure U and the substructure L are positioned vertically opposite each other, with their horizontal positions overlapping. The sliding bearing 100 prevents the shaking from the lower structure L from being transmitted to the upper structure U when an earthquake occurs at the location where the upper structure U is installed. The sliding bearing 100 shown in Figure 1 is a spherical sliding bearing and comprises a spherical seat portion 10, a slider 20, a shoe 30, and a friction material F.

[0011] The spherical seat portion 10 is positioned on the upper part of the lower structure L. The spherical seat portion 10 is fixed to the upper part of the lower structure L. The spherical seat portion 10 is provided with a first sliding surface S1. The first sliding surface S1 is provided on the upper part of the spherical seat portion 10. The first sliding surface S1 is a concave spherical shape that is concave downwards. The first sliding surface S1 is a sliding surface on which the slider 20 can rotate. In this embodiment, the ball seat portion 10 is made of, for example, ordinary steel or stainless steel.

[0012] The slider 20 is positioned on the first sliding surface S1 of the ball seat portion 10. The slider 20 is sized to be rotatable relative to the ball seat 10. The slider 20 slides with respect to the ball seat portion 10, with the center of the first sliding surface S1 of the ball seat portion 10 as the center, while maintaining a constant distance from this center.

[0013] The upper shoe 30 is located above the slider 20 and below the superstructure U. The upper shoe 30 is provided with a second sliding surface S2. The second sliding surface S2 is provided on the upper part of the slider 20. The second sliding surface S2 is a concave spherical shape that is concave upwards.

[0014] The upper shoe 30 comprises a plate-shaped member 300 and the above-described second sliding surface S2 (sliding surface) on the plate-shaped member 300. The plate-shaped member 300 has a concave portion 301 at its lower end that is recessed upward. The plate-shaped member 300 is made of, for example, ordinary steel or stainless steel and is formed from a single piece of material. The plate-shaped member 300 has a concave spherical surface 301a on the inner side in the direction of the recess, which is recessed upward. Making the plate-shaped member 300 out of ordinary steel, i.e., iron, can reduce material costs and make it easier to process. For this reason, it is preferable to make the plate-shaped member 300 out of iron, but it may also be made of stainless steel.

[0015] The washer 30 includes a layered portion 302 formed in layers on the concave spherical surface 301a of the plate-like member 300. The layered portion 302 has the above-described second sliding surface S2 which is a concave spherical surface that is provided at the lower part and recessed upward. The layered portion 302 is integrally formed with the plate-like member 300. Therefore, the second sliding surface S2 is integrally formed with the plate-like member 300. The second sliding surface S2 is provided on the concave spherical surface 301a of the plate-like member 300. The layered portion 302 is formed of stainless steel. The lower surface of the layered portion 302 facing downward is the second sliding surface S2. Therefore, the second sliding surface S2 is formed of stainless steel.

[0016] In the sliding bearing 100 having each of the above-described configurations, for example, when an earthquake occurs at the installation location of the sliding bearing 100, the first sliding surface S1 and the second sliding surface S2 slide relative to each other.

[0017] FIG. 2 is a view showing a state in which the spherical seat portion 10 and the washer 30 relatively move in a substantially horizontal direction in the sliding bearing 100 shown in FIG. 1. As shown in FIG. 2, when the superstructure U and the substructure L relatively move in a substantially horizontal direction, the sliding bearing 100 suppresses the transmission of the sway on the substructure L side to the superstructure U.

[0018] (Regarding the friction material F) The friction material F according to the present embodiment is disposed, for example, between the first sliding surface S1 and the slider 20 and between the second sliding surface S2 and the slider 20 as shown in FIG. 1. In that case, for example, the friction material F is placed on the first sliding surface S1 and supported by the spherical seat portion 10. Also, for example, the friction material F is placed on the upper part of the slider 20 and supported by the slider 20. The friction material F may be provided on both the first sliding surface S1 of the ball seat portion 10 and the opposing surface of the slider 20, or it may be provided on either the first sliding surface S1 of the ball seat portion 10 or the opposing surface of the slider 20. Furthermore, the friction material F may be provided on both the second sliding surface S2 of the shoe 30 and the opposing surface of the slider 20, or it may be provided on either the second sliding surface S2 of the shoe 30 or the opposing surface of the slider 20. The friction material F, which is placed on the first sliding surface S1 and the second sliding surface S2, will be described below.

[0019] The friction material F is placed to provide lubrication to the first sliding surface S1 and the second sliding surface S2.

[0020] In this embodiment, the friction material F includes fibers. In other words, the friction material F is formed from fibers. Here, the material of the friction material F is, for example, PTFE (polytetrafluoroethylene). The friction material F is formed, for example, by a double fabric. The double fabric is formed, for example, by PTFE fibers and fibers with a higher tensile strength than PTFE fibers (high-strength fibers). Here, "fibers with higher tensile strength than PTFE fibers" include polyamides such as nylon 6·6, nylon 6, and nylon 4·6, as well as polyesters such as polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and para-aramid fibers. Other examples include fibers such as meta-aramid, polyethylene, polypropylene, glass, carbon, polyphenylene sulfide (PPS), LCP, polyimide, and PEEK. Additionally, heat-fusible fibers, cotton, wool, and other fibers may be used. Among these, PPS fibers are preferred because they have excellent chemical resistance, hydrolysis resistance, and extremely high tensile strength. The friction material F may be a fabric containing PTFE fibers other than a double-woven fabric. The friction material F may be made solely from PTFE. The friction material F may be made from a composite material of PTFE and other resins. The friction material F may have a laminated structure consisting of a friction material made of PTFE and a friction material made of another resin.

[0021] (Regarding the manufacturing method of shoe 30) In this embodiment, the shoe 30 is manufactured by the following manufacturing method. Figure 3 is a cross-sectional view illustrating the spraying process and the heating process in the method for manufacturing the shoe 30 according to the embodiment. Figure 4 is a plan view showing the state after the spraying and heating steps in the shoe manufacturing method according to the embodiment.

[0022] The method for manufacturing the shoe 30 includes a plate-shaped member manufacturing step in which a plate-shaped member 300 is manufactured. In this plate-shaped member manufacturing step, a concave portion 301 is formed from a material made of ordinary steel or stainless steel by cutting or other means, including a concave spherical surface 301a that is circular in plan view and becomes deeper towards the center.

[0023] The method for manufacturing the shoe 30 involves a spraying step in which metal powder, which is a precursor of the sliding surface material, is sprayed onto the concave spherical surface 301a, which is the sliding surface formation position of the concave portion 301 of the plate-shaped member 300, while simultaneously performing a heating step in which the metal powder is heated. In other words, the spraying step and the heating step are performed in parallel. Here, the metal powder is made of stainless steel, but it may also be made of ordinary steel other than stainless steel. The precursor metal powder is in powder form, but it may also be in a state other than powder form. The heating step is preferably performed by laser irradiation of the precursor metal powder, but the precursor metal powder may also be heated by means other than laser irradiation. The heating in this heating step melts the precursor metal powder. In this heating step, at least a portion of the precursor metal powder melts.

[0024] When a heating process is performed while a spraying process is carried out, the precursor metal powder is welded to the concave spherical surface 301a of the plate-shaped member 300 at the heated area, forming a build-up layer of the layered portion 302. The method for manufacturing the shoe 30 involves expanding the area of ​​build-up of the layered portion 302 by performing such spraying and heating processes, thereby forming a build-up layer of the layered portion 302 over a predetermined area of ​​the concave spherical surface 301a. The build-up process, which involves a heating process while a spraying process is carried out, can be realized, for example, by a 3D printer P. However, the build-up process, which involves a heating process while a spraying process is carried out, may also be realized by means other than a 3D printer.

[0025] The method for manufacturing the shoe 30 involves a build-up process that includes a heating process while simultaneously performing a spraying process to continuously form a portion of the layered portion 302, for example, but it is not necessary to form it continuously. When the method for manufacturing the shoe 30 involves a build-up process that includes a heating process while simultaneously performing a spraying process to continuously form a portion of the layered portion 302, for example, the layered portion 302 is formed to form a spiral shape from the radial outer end portion of the concave spherical surface 301a toward the center. At this time, as shown in Figure 3, it is preferable to always irradiate the laser R from the head H of the 3D printer P in a straight line connecting the center of the concave spherical surface 301a and the irradiation position, but it may be irradiated at other angles.

[0026] In the method for manufacturing the shoe 30, when forming the layered portion 302 in a spiral shape from the radial outer end of the concave spherical surface 301a toward the center, it is preferable to form it so that adjacent portions of the spiral in the radial direction partially overlap in the radial direction. This ensures that the layered portion 302 is formed without gaps. In this case, the overlapping portion of the spiral becomes thicker than the non-overlapping portion. As a result, the concave portion 301 of the plate-like member 300 includes a spiral convex portion 302a consisting of the overlapping portion of the spiral, as shown in Figure 4, and the layered portion 302(A) is formed. The layered portion 302(A) is formed by a build-up process that involves a heating process while performing a spraying process, for example, excluding the area near the center of the concave spherical surface 301a.

[0027] The method for manufacturing the shoe 30 involves an additional build-up step to form the layered portion 302(B) near the center of the concave spherical surface 301a, which was not formed by the build-up step which involves a heating step while spraying, for example by TIG build-up welding. At this time, the additional build-up is performed so that there is no gap between the layered portion 302(A) and the layered portion 302(B). Note that the layered portion 302(B) near the center of the concave spherical surface 301a may also be formed by build-up welding other than TIG build-up welding. By performing a build-up process that involves a heating process while spraying, and an additional build-up process using TIG welding, the concave spherical surface 301a of the plate-shaped member 300 is completely covered with the layered portion 302 without any gaps.

[0028] The method for manufacturing the shoe 30 involves, next, a plating process in which a heating process is performed while a spraying process is carried out, followed by a plating process in which plating is applied to the plate-shaped member after the additional plating process. This plating process is optional. If the plating process is carried out, it is preferable to apply hot-dip galvanizing to the plate-shaped member, but other types of plating may also be applied.

[0029] The method for manufacturing the shoe 30 involves a rough finishing process in which cutting is performed on the formation position of the second sliding surface S2 of the layered portion 302 after the plating process. This rough finishing process involves cutting the side of the layered portion 302 that covers the concave spherical surface 301a of the plate-shaped member 300, opposite to the concave spherical surface 301a, and is performed, for example, by a lathe.

[0030] The method for manufacturing the shoe 30 involves a polishing step to form the second sliding surface S2 by polishing the layered portion 302 after the plating step at the position where the second sliding surface S2 is formed. This polishing step involves polishing the side of the layered portion 302 that covers the concave spherical surface 301a of the plate-shaped member 300, opposite to the concave spherical surface 301a, after rough finishing, and is performed, for example, by a grinder.

[0031] The method for manufacturing the shoe 30 involves an additional plating step, in which plating is applied to the plate-shaped member after the polishing step. This additional plating step is optional. If the additional plating step is performed, it is preferable to apply hot-dip galvanizing to the plate-shaped member, but other types of plating may also be applied.

[0032] The shoe 30 manufactured by the above manufacturing method comprises a plate-shaped member 300 and a second sliding surface S2 which is a sliding surface on the plate-shaped member 300, and there is no gap between the second sliding surface S2 and the plate-shaped member 300. Here, the layered portion 302 formed by the build-up process, which involves a heating process while spraying, and the additional build-up process may produce point-like defects between it and the plate-shaped member 300, but it does not spread in a planar manner between them. Therefore, there is no gap between the second sliding surface S2 and the plate-shaped member 300 of the shoe 30. The second sliding surface S2 is integrally formed with the plate-shaped member 300. The second sliding surface S2 is provided on the concave spherical surface 301a of the plate-shaped member 300. The second sliding surface S2 is made of stainless steel.

[0033] The shoe 30 according to the embodiment described above is a shoe 30 provided on a sliding support 100 positioned between an upper structure U and a lower structure L facing the upper structure U. This shoe 30 comprises a plate-shaped member 300 and a second sliding surface S2 which is a sliding surface on the plate-shaped member 300, and there is no gap between the second sliding surface S2 and the plate-shaped member 300. In this way, since there is no gap between the second sliding surface S2 and the plate-shaped member 300, it is possible to suppress the intrusion of rainwater and the like between them, and thus it is possible to suppress corrosion that occurs between them. Therefore, it is possible to improve the durability of the shoe 30. If there is a gap between the second sliding surface S2 and the plate-shaped member 300, the gap will spread in a planar manner, making it easy for rainwater and other substances to penetrate due to capillary action. However, even if a point-like defect occurs between the second sliding surface S2 and the plate-shaped member 300, unlike a gap, the point-like defect will not spread in a planar manner, thus suppressing the penetration of rainwater and other substances. The shoe 30 is particularly effective in improving durability when the sliding bearing 100 equipped with it is a sliding bearing for bridges, as it is subjected to particularly harsh environments.

[0034] Furthermore, in the shoe 30 according to this embodiment, the second sliding surface S2, which is a sliding surface, is integrally formed with the plate-shaped member 300. By integrally forming the plate-shaped member 300 and the second sliding surface S2 in this way, it becomes unnecessary to pull the separate member into the plate-shaped member 300 with bolts or the like, which was necessary when a separate member having the second sliding surface S2 is provided separately from the plate-shaped member 300. Note that the shoe 30 does not necessarily have to have the second sliding surface S2, which is a sliding surface, integrally formed with the plate-shaped member 300.

[0035] Furthermore, in the shoe 30 according to this embodiment, the plate-shaped member 300 is made of iron, and the second sliding surface S2, which is a sliding surface, is made of stainless steel. In this way, the cost can be reduced by making the plate-shaped member 300 out of iron, and the durability of the second sliding surface S2 can be ensured by making the second sliding surface S2, which is a sliding surface, out of stainless steel. Note that the plate-shaped member 300 does not have to be made of iron, and the second sliding surface S2, which is a sliding surface, does not have to be made of stainless steel.

[0036] Furthermore, in the shoe 30 according to this embodiment, a concave spherical surface 301a is formed on the plate-shaped member 300, and the second sliding surface S2, which is the sliding surface, is provided on the concave spherical surface 301a, so it is easy to form the second sliding surface S2 in a concave spherical shape. Note that the plate-shaped member 300 does not necessarily have to have a concave spherical surface 301a.

[0037] The sliding bearing 100 according to this embodiment includes a shoe 30, and the shoe 30 provides the effects described above.

[0038] The method for manufacturing the shoe 30 according to this embodiment involves spraying metal powder of the sliding surface material onto the concave spherical surface 301a, which is the sliding surface formation position of the plate-shaped member 300, in a spraying step, and then heating the metal powder in a heating step. This allows a layered portion 302 for forming the second sliding surface S2, which is the sliding surface, to be welded to the concave spherical surface 301a, which is the sliding surface formation position of the plate-shaped member 300. This eliminates the need for a mold to form the sliding surface forming member, which is required when manufacturing the plate-shaped member and the sliding surface forming member separately. As a result, a mold is not required, making this method particularly suitable for use in custom-made sliding bearings for bridges.

[0039] Furthermore, in the method for manufacturing the shoe 30 according to this embodiment, the heating step is performed by laser irradiation of the metal powder, which allows for instantaneous heating with reduced heat input to the plate-shaped member by the laser, thereby improving the quality of the shoe 30. Note that the heating step may be performed by means other than laser irradiation.

[0040] Furthermore, in the manufacturing method of the shoe 30 according to the embodiment, the plate-shaped member 300 is plated after the heating process by a plating process, which further improves the durability of the plate-shaped member 300. In particular, in the case of a sliding bearing 100 for a bridge that is placed in a harsh environment, the effect of further improving the durability of the plate-shaped member 300 is high. In addition, the second sliding surface S2, which is the sliding surface after the plating process, is formed by polishing in a polishing process, which improves the accuracy of the second sliding surface S2. Note that the plating process is not required.

[0041] Furthermore, in the manufacturing method of the shoe 30 according to the embodiment, since the plate-shaped member 300 after the heating process is subjected to hot-dip galvanizing during the plating process, the shoe 30 can be used for a long period of time. In particular, in the case of sliding bearings 100 for bridges that are placed in harsh environments, the effect of being able to use the shoe 30 for a long period of time is significant. Note that in the plating process, a plating other than hot-dip galvanizing may be applied to the plate-shaped member after the heating process.

[0042] Furthermore, in the method for manufacturing the shoe 30 according to this embodiment, since the spraying step and the heating step are performed in parallel, a layered portion 302 for forming the second sliding surface S2, which is a sliding surface, can be easily and accurately formed on the plate-shaped member 300. Note that the spraying step and the heating step do not necessarily have to be performed in parallel.

[0043] Furthermore, in the method for manufacturing the shoe 30 according to this embodiment, since the spraying and heating processes are carried out by a 3D printer, a layered portion 302 for forming the second sliding surface S2, which is a sliding surface, can be easily and accurately formed on the plate-shaped member 300. Note that the spraying and heating processes do not necessarily have to be carried out by a 3D printer.

[0044] In the embodiments described above, a shoe 30 is fixed to an upper structure U, a ball seat 10 is fixed to a lower structure L, and the shoe 30 is capable of relative horizontal movement with respect to a slider 20 provided between the shoe 30 and the ball seat 10, as an example of a single pendulum type sliding bearing 100. However, the invention is not limited to this. For example, in a double pendulum type sliding bearing in which an upper shoe is fixed to an upper structure U, a lower shoe is fixed to a lower structure L, and both the upper and lower shoes are capable of relative horizontal movement with respect to a support provided between the upper and lower shoes, at least one of the upper and lower shoes can be manufactured in the same manner as the shoe 30 to achieve a configuration similar to the shoe 30.

[0045] Furthermore, although the above embodiments have described a sliding bearing 100 which is a spherical sliding bearing in which the second sliding surface S2 of the shoe 30 is a concave spherical surface, the invention is not limited to this. For example, it can also be applied to a planar sliding bearing in which the shoe has a planar sliding surface.

[0046] (Note) The method for manufacturing the sliding bearing and the sliding bearing having a spherical surface according to the above embodiment can be understood, for example, as follows.

[0047] (1) A shoe relating to one aspect of this disclosure is: An upper or lower shoe of a sliding bearing positioned between a superstructure and a lower structure facing the superstructure, The shoe comprises a plate-like member and a sliding surface on the plate-like member. There is no gap between the sliding surface and the plate-like member.

[0048] Thus, in the shoe according to one aspect of this disclosure, there is no gap between the sliding surface and the plate-like member, which prevents rainwater and the like from entering between them, and thus prevents corrosion that occurs between them. Consequently, it is possible to improve durability.

[0049] (2) In the case of the upper or lower shoe referred to in (1) above, The sliding surface may be integrally formed with the plate-like member.

[0050] With this configuration, the plate-like member and the sliding surface are integrally formed, eliminating the need to pull the separate member into the plate-like member with bolts or the like, which would have been necessary if a separate member with a sliding surface had been provided separately from the plate-like member.

[0051] (3) In the case of shoes relating to (1) or (2) above, The aforementioned plate-like member is made of iron, The aforementioned sliding surface may be made of stainless steel.

[0052] With this configuration, costs can be reduced by forming the plate-shaped members from iron, and the durability of the sliding surface can be ensured by forming the sliding surface from stainless steel.

[0053] (4) In the case of any shoe relating to any one of the above (1) to (3), The plate-like member has a concave spherical surface formed therein. The sliding surface may also be provided on the concave spherical surface.

[0054] With this configuration, it is easy to form the sliding surface into a concave spherical shape.

[0055] (5) A sliding bearing relating to one aspect of this disclosure is The shoe is provided with one of the shoes described in (1) through (4) above.

[0056] Thus, since the sliding bearing is equipped with a shoe relating to any one of (1) to (4) above, each shoe performs the effect described above.

[0057] (6) A method for manufacturing shoes according to one aspect of the present disclosure is: A method for manufacturing an upper or lower shoe for a sliding bearing positioned between a superstructure and a lower structure facing the superstructure, The shoe comprises a plate-like member and a sliding surface on the plate-like member. A spraying step in which metal powder of the sliding surface material is sprayed onto the sliding surface formation position of the plate-shaped member, A heating step for heating the aforementioned metal powder, Includes.

[0058] Thus, in the method for manufacturing the shoe, a metal powder, which is a precursor of the sliding surface material, is sprayed onto the sliding surface formation position of the plate-shaped member in a spraying step, and then the metal powder precursor is heated in a heating step, allowing a layered portion for forming the sliding surface to be welded to the sliding surface formation position of the plate-shaped member. This eliminates the need for a mold to form the sliding surface formation member, which is required when manufacturing the plate-shaped member and the sliding surface forming member separately. Because a mold is not required in this way, it is particularly suitable for use in custom-made sliding bearings for bridges.

[0059] (7) In the method for manufacturing the upper or lower shoe described in (6) above, The heating step may also be performed by irradiating the metal powder with a laser.

[0060] With this configuration, the heating process is performed by irradiating the metal powder with a laser, which allows for instantaneous heating with reduced heat input to the plate-shaped component by the laser, thereby improving the quality of the shoe.

[0061] (8) In the method for manufacturing the upper or lower shoe relating to (6) or (7) above, A plating step in which plating is applied to the plate-shaped member after the heating step, A polishing step in which polishing is performed on the position where the sliding surface is formed after the plating step, It would also be acceptable as a composition that includes this.

[0062] With this configuration, the plating process applies plating to the plate-shaped member after the heating process, thereby further improving the durability of the plate-shaped member. In addition, the polishing process polishes the area where the sliding surface is formed after the plating process, thereby improving the precision of the sliding surface.

[0063] (9) In the method for manufacturing the upper or lower shoe according to (8) above, the plating step may be configured to apply hot-dip galvanizing to the plate-shaped member after the heating step.

[0064] With this configuration, the plating process involves applying hot-dip galvanizing to the plate-shaped member after the heating process, thus enabling long-term durability of the upper or lower shoe.

[0065] (10) In the method for manufacturing an upper or lower shoe relating to any one of (6) to (9) above, the spraying step and the heating step may be performed in parallel.

[0066] With this configuration, the spraying process and the heating process are carried out in parallel, making it possible to easily and accurately form a layered portion for creating a sliding surface on the plate-shaped member.

[0067] (11) In the method for manufacturing an upper or lower shoe relating to any one of (6) to (10) above, the spraying step and the heating step may be implemented by a 3D printer.

[0068] With this configuration, the spraying and heating processes are performed by a 3D printer, making it possible to easily and accurately form layered sections for creating a sliding surface on a plate-shaped member. [Explanation of symbols]

[0069] 10 Ball seat part 20 Slider 30 Upper shoe (or lower shoe) 100 sliding bearing 300 Plate-shaped member 301 Concave part 301a concave spherical surface 302 Layered section F Friction material H Head L Substructure P 3D printer R laser S1 1st sliding surface S2 Second sliding surface (sliding surface) U superstructure

Claims

1. A shoe provided in a sliding support positioned between a superstructure and a lower structure facing the superstructure, The shoe comprises a plate-like member and a sliding surface on the plate-like member. A shoe in which there is no gap between the sliding surface and the plate-like member.

2. The shoe according to claim 1, wherein the sliding surface is integrally formed with the plate-like member.

3. The aforementioned plate-like member is made of iron, The shoe according to claim 1, wherein the sliding surface is made of stainless steel.

4. The plate-like member has a concave spherical surface formed therein. The shoe according to claim 1, wherein the sliding surface is provided on the concave spherical surface.

5. A sliding bearing comprising a shoe as described in any one of claims 1 to 4.

6. A method for manufacturing a shoe for a sliding support positioned between a superstructure and a lower structure facing the superstructure, The shoe comprises a plate-like member and a sliding surface on the plate-like member. A spraying step in which metal powder of the sliding surface material is sprayed onto the sliding surface formation position of the plate-shaped member, A heating step for heating the aforementioned metal powder, including, How to make shoes.

7. The heating step is performed by irradiating the metal powder with a laser. The method for manufacturing a shoe according to claim 6.

8. A plating step in which plating is applied to the plate-shaped member after the heating step, A polishing step in which polishing is performed on the position where the sliding surface is formed after the plating step, A method for manufacturing shoes according to claim 7, including the following:

9. The plating process involves applying hot-dip galvanizing to the plate-shaped member after the heating process. The method for manufacturing a shoe according to claim 8.

10. The spraying process and the heating process are carried out in parallel. The method for manufacturing a shoe according to claim 6.

11. The method for manufacturing shoes according to any one of claims 6 to 10, wherein the spraying step and the heating step are performed by a 3D printer.

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