JP4720452B2 - SLIP MEMBER, MANUFACTURING METHOD OF THE SLIP MEMBER, AND SLIP SEISMIC ISOLATION DEVICE USING THE SLIP MEMBER - Google Patents

Description

  The present invention relates to a sliding member, a method for producing the sliding member, and a sliding seismic isolation device using the sliding member, and more particularly, to a sliding member that exhibits excellent friction characteristics when used under low speed and high load conditions, and the slip member The present invention relates to a sliding member manufacturing method and a sliding seismic isolation device using the sliding member.

Japanese Examined Patent Publication No. 39-14852 Japanese Patent Publication No.58-35468 JP-A-11-182095

  Conventionally, in order to obtain a sliding member made of a phenolic resin containing a cotton cloth base material, a solid lubricant powder such as graphite, molybdenum disulfide or ethylene tetrafluoride resin (hereinafter abbreviated as “PTFE”) is dispersed in a phenolic resin varnish. A cotton fabric base material is dipped in the fabric and pulled up, heated appropriately to dissipate the solvent to obtain a prepreg in which the solid lubricant is adhered and impregnated on the cotton fabric base material, and this is used as a laminated sliding member as a molding material. The method of doing is used.

  However, in order to maintain workability when forming the prepreg by dipping and pulling up the cotton fabric base material, it is necessary to keep the mixing ratio of the solid lubricant relatively low, and as a result, the solid lubricant obtained by the above-mentioned known method In the sliding member, a large reduction in the coefficient of friction cannot be obtained, and sufficient wear resistance cannot always be obtained.

  In addition, even if the mixing ratio of the solid lubricant can be increased, the mixture of the resin and the solid lubricant is not sufficiently filled in the fiber structure gap of the fiber base material by simple dipping. If the prepreg is used for lamination molding, the resulting molded product may cause delamination, and as a result, the mechanical strength of the sliding member may be significantly reduced. is there.

  In order to solve such problems, a reinforcing base material is impregnated with a synthetic resin varnish in advance, and then a varnish containing a solid lubricant is applied to the varnish-impregnated base material, or an aqueous dispersion of a solid lubricant is applied. For example, there is a method in which a solid lubricant is attached only to substantially the surface of the substrate (described in Patent Document 1). However, even in the method disclosed in Patent Document 1, it is difficult to say that the sliding member has low friction and wear resistance.

  In addition to the above-described sliding member, PTFE fibers and other fibers such as cotton fibers and glass fibers are formed on the surface (sliding surface) of a substrate in which a plurality of prepregs impregnated with resin varnish are woven into a woven fabric such as cotton cloth. There has been proposed a sliding member obtained by integrally laminating these unwoven fabrics (Patent Document 2). This Patent Document 2 discloses a resin made of PTFE fibers and other fibers other than the PTFE fibers, and impregnated with 25 to 40% by weight of a thermosetting synthetic resin in a woven fabric in which the PTFE fibers occupy 60 to 85% on the surface. A surface layer material made of a processed PTFE interwoven fabric is disclosed. Since this surface layer material is used by being joined and integrated with the backing material, it is necessary to expose fibers other than PTFE fibers on the back surface that becomes the joining surface with the backing material, The exposed ratio of PTFE fibers exhibiting low friction cannot be 100% on the surface. Accordingly, fibers that do not contribute to low friction are exposed on the sliding surface, and it is difficult to say that the sliding member exhibits low friction.

  The sliding members disclosed in Patent Document 1 and Patent Document 2 described above can be sufficiently used for specific applications. In recent years, however, such sliding members have been used in buildings, bridges, and elevated roads in the construction, civil engineering fields. When it is installed in combination with an elastic bearing that supports and is applied to a sliding seismic isolation device to reduce the seismic force applied to the building or the like, there is a problem that it is difficult to withstand use from the viewpoint of low friction.

  As an application of such a sliding member to a sliding seismic isolation device, there has been proposed a seismic isolation device obtained by impregnating a woven fabric of polyethylene terephthalate with a resin composition obtained by adding PTFE to an unsaturated polyester resin (Patent Document). 3)).

  This seismic isolation device can be applied to a seismic isolation device that could not be achieved by the above-mentioned sliding member, but it is not necessarily satisfactory in terms of low friction as a sliding seismic isolation device. . In other words, the slip isolation device greatly affects the slippage due to the seismic force due to the magnitude of the friction coefficient. For example, when the friction coefficient is about 0.1, the slippage must be less than 0.1 G (gal). The sliding surface in the seismic isolation device does not slide out, which impedes the function of the seismic isolation device.

  The present invention has been made in view of the above-described points, and the object of the present invention is to provide a slip immunity that has a low friction property and can exhibit a sufficient seismic isolation function even from a large seismic force to a small seismic force. An object of the present invention is to provide a sliding member that can be applied to a seismic device, a method for manufacturing the sliding member, and a slip isolation device that uses the sliding member.

  The sliding member of the present invention comprises a substrate made of a laminate of a fiber woven fabric reinforced thermosetting synthetic resin, a woven fabric of PTFE fibers and a woven fabric of organic fibers superimposed, and stitched together by a fluororesin yarn. And a surface layer material impregnated with a thermosetting synthetic resin and bonded to one surface of the substrate on the woven fabric side of the organic fiber, and the surface of the substrate and the surface layer material are opened at the surface of the surface layer material and a part of the substrate And a solid lubricant filled and held in the recess, wherein the solid lubricant comprises 5 to 30% by weight of silicone oil and 20 to 40% by weight of silicone wax. It contains 20 to 40% by weight of melamine cyanurate and 20 to 50% by weight of tetrafluoroethylene resin.

  According to the sliding member of the present invention, the woven fabric of the PTFE fiber of the surface layer material and the fluororesin yarn are exposed on the surface of the surface layer material serving as the sliding surface and filled and held in the recesses opened on the surface of the surface material. As a result, the solid lubricant filled and held in the recesses is formed as a thin film on the surface of the woven fabric of PTFE fibers when the solid lubricant is exposed and slides with the counterpart material on the surface of the surface layer material. The low friction property inherent to PTFE and the low friction property of the solid lubricant are exhibited.

  The solid lubricant filled and held in the recesses contains silicone oil that is absorbed and held in silicone wax, so that the silicone oil is supplied to the sliding surface by frictional heat generated by sliding against the mating material. As a result, even lower friction is exhibited.

  In a preferable example of the sliding member of the present invention, the organic fiber woven fabric forming the surface layer material is selected from one of cotton fabric, aramid fiber woven fabric, polyester fiber woven fabric, and cotton and polyester fiber mixed woven fabric. It has been done.

  The woven fabric of organic fibers forming the surface layer material plays a role of a bonding layer when the woven fabric of PTFE fibers is integrally bonded to the surface of the substrate. By using these woven fabrics, the woven fabric of PTFE fibers is used. Strong joining and integration of the woven fabric to the surface of the substrate can be achieved.

  In a preferred example of the sliding member of the present invention, PTFE yarn and ethylene tetrafluoride / propylene hexafluoride are used as the fluororesin yarn for stitching together the woven fabric of PTFE fiber and the woven fabric of organic fiber forming the surface material. These yarns are selected from yarns made of a copolymer (hereinafter abbreviated as “FEP”), and these fluororesin yarns are either single yarns or spinning yarns, and are generally 200 to 1,200. Those in the denier range are preferred.

  By integrating the woven fabric of PTFE fiber and the woven fabric of organic fiber with a fluorine resin yarn, the PTFE fiber and the fluorine resin yarn are exposed on the surface of the surface layer material that becomes the sliding surface, In sliding with the mating material, the low friction inherent in PTFE fibers and fluororesin yarns is exhibited.

  The manufacturing method of the sliding member of the present invention is a laminate in which a plurality of prepregs obtained by applying a thermosetting synthetic resin varnish to a woven fabric composed of at least one of organic fibers and inorganic fibers are stacked. A base material, a PTFE fiber woven fabric and an organic fiber woven fabric are prepared, and the PTFE fiber woven fabric and the organic fiber woven fabric are overlapped and overlapped with each other by a fluororesin. A step of forming a surface layer material prepreg by impregnating and applying a thermosetting synthetic resin varnish after stitching and integrating in the overlapping direction by yarn-making, and the surface layer material prepreg on one side of the base on the woven fabric side of the organic fiber The step of placing the surface layer material prepreg and the base body on the surface and heating and pressure forming to integrally bond the surface layer material to the surface of the base body, and opening the surface layer material and the base body on the surface of the surface layer material. Mixing at least one recess extending to a part of the substrate, 5-30% by weight of silicone oil, 20-40% by weight of silicone wax, 20-40% by weight of melamine cyanurate, and 20-50% by weight of PTFE Mixing in a machine to produce a solid lubricant kneaded material, and supplying a solid lubricant kneaded material to the surface layer material including the recess, compressing the solid lubricant kneaded material, and filling the recess It is out.

  According to the method for manufacturing a sliding member of the present invention, heating and pressurizing a substrate and a surface layer material prepreg made of a laminate in which a plurality of prepregs obtained by applying a thermosetting synthetic resin varnish to a woven fabric are laminated. When forming, PTFE fiber is formed by organic fiber woven fabric exposed on one surface of the surface layer material to be a joint surface with the surface of the substrate, so that both are firmly integrated and integrated with the organic fiber woven fabric. The woven fabric can be integrally bonded to one surface of the substrate through the woven fabric of organic fibers.

  The thermosetting synthetic resin is, for example, a varnish obtained by dissolving the initial condensate in a volatile solvent such as methanol, acetone or methyl ethyl ketone (various volatile solvents are used depending on the type of thermosetting synthetic resin used). Applied in the form of The varnish preferably has a solid content of about 30 to 65% by weight, and the viscosity of the varnish is preferably about 800 to 5000 centipoise (cP), especially 1000 to 4000 cP.

  In a preferred example of the method for producing a sliding member of the present invention, the organic fiber forming the base material and the surface layer material includes at least one of cotton fiber, aramid fiber and polyester fiber, and the inorganic fiber forming the base material is And at least one of glass fiber and carbon fiber.

  In a preferred example of the manufacturing method of the sliding member of the present invention, the woven fabric of PTFE fiber and the woven fabric of organic fiber are any one of comb stitch, parallel stitch, regular stitch, half reverse stitch, and stitch stitch by a fluororesin thread. Fluorine resin yarn is stitched and integrated by one method, and the fluororesin yarn is selected from either PTFE yarn or FEP yarn, and is either a single yarn or a spinning yarn, generally in the range of 200 to 1,200 denier. It is.

  According to the present invention, on the surface of the surface layer material that becomes the sliding surface, the woven fabric of the PTFE fiber of the surface layer material and the fluororesin yarn are exposed and filled and held in the recesses opened on the surface of the surface material. Since the agent is exposed, the solid lubricant filled and held in the recesses is formed as a thin film on the surface of the woven fabric of PTFE fibers in sliding with the counterpart material on the surface of the surface layer material, and the solid lubricant As a result of supplying the silicone oil to the sliding surface by sliding friction heat, it is possible to provide a sliding member that can fully exhibit the low friction property inherent to PTFE and the low friction property of a solid lubricant, and a method for manufacturing the same. Since such a sliding member has a low speed dependency and a low coefficient of friction in sliding with the counterpart material, the seismic isolation cycle can be lengthened while keeping the sliding acceleration small. Due to earthquakes, etc. Obtain reduce its transmission to the superstructure against movement, it is possible to provide a sliding isolation device capable of achieving a reliable protection of the superstructure.

  Next, the present invention and its embodiments will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.

  1 to 4, a sliding member 1 includes a rectangular column base 2 made of a laminate of fiber woven cloth reinforced thermosetting synthetic resin, and a surface layer material 4 integrally bonded to one surface 3 of the base 2. A plurality of cylindrical recesses 6 formed in the substrate 2 and the surface layer material 4 at the surface 5 of the surface layer material 4 and extending to a part of the substrate 2, and filled and held in the recesses 6. And solid lubricant 7. The sliding member 1 may be a cylinder as shown in FIG. 7, and the recess 6 is a recess 6 composed of two rectangular long grooves perpendicular to each other as shown in FIG. Also good.

  In the manufacturing apparatus for the base 2 of the sliding member 1 shown in FIG. 5, the reinforcing base material 9 made of a woven fabric wound around an uncoiler 8 is placed in a container 12 in which a thermosetting synthetic resin varnish 11 is stored by a feed roller 10. By being passed through the thermosetting synthetic resin varnish 11 stored in the container 12 by the guide rollers 13 and 14 provided in the container 12, the thermosetting property is applied to the surface of the reinforcing base 9. A synthetic resin varnish 11 is applied. Next, the reinforcing base material 9 coated with the thermosetting synthetic resin varnish 11 was sent to the compression rolls 16 and 17 by the feed roller 15 and applied to the surface of the reinforcing base material 9 by the compression rolls 16 and 17. The thermosetting synthetic resin varnish 11 is impregnated into the fiber structure gap. The reinforcing base 9 impregnated with the thermosetting synthetic resin varnish 11 is subjected to a resin reaction at the same time as the solvent is blown in the drying furnace 18. 19 is produced. As shown in FIG. 6, the prepreg 19 thus obtained is cut into a desired size, and a plurality of the prepregs 19 are overlapped to produce a substrate 2 made of a laminate of fiber woven cloth reinforced thermosetting synthetic resin. .

  As the woven fabric used for the substrate 9, a woven fabric made of organic fibers such as cotton fibers, aramid fibers or polyester fibers, or inorganic fibers such as glass fibers or carbon fibers is suitable. Further, as the thermosetting synthetic resin, phenol resin, epoxy resin, unsaturated polyester resin, etc. are suitable, and as the volatile solvent of these thermosetting synthetic resins, thermosetting using methanol, acetone, methyl ethyl ketone, etc. It is appropriately selected depending on the synthetic resin. The solid content of the thermosetting synthetic resin varnish formed by dissolving the thermosetting synthetic resin in a volatile solvent is about 30 to 65% by weight, and the viscosity of the resin varnish is about 800 to 5000 cP. 1000 to 4000 cP is preferred.

  The surface layer material 4 is produced as follows. A woven fabric 4a of PTFE fibers and a woven fabric 4b of organic fibers are prepared, and the woven fabric 4a of PTFE fibers and the woven fabric 4b of organic fibers are overlapped. Next, both the woven fabrics 4a and 4b are stitched together in the overlapping direction with the fluororesin yarn 4c (FIGS. 3 and 4).

  As the fluorine resin yarn, either PTFE yarn or FEP yarn is used, and the fluorine resin yarn is either a single yarn or a spun yarn, and generally has a range of 200 to 1,200 denier. Is done. Both the woven fabrics 4a and 4b are stitched and integrated with the fluororesin yarn 4c by any one of comb stitching, side stitching, main reverse stitching, half reverse stitching and stitching stitching.

  Thus, the PTFE fiber woven fabric 4a and the organic fiber woven fabric 4b, which are stitched and integrated with each other by the fluororesin yarn, are manufactured by a manufacturing apparatus similar to the manufacturing apparatus shown in FIG. It is processed by the same manufacturing method. That is, the PTFE fiber woven fabric 4 a and the organic fiber woven fabric 4 b wound around the uncoiler 8 and stitched together by the fluororesin yarn 4 c were stored with the thermosetting synthetic resin varnish 11 by the feed roller 10. It is sent to the container 12 and is passed through the thermosetting synthetic resin varnish 11 stored in the container 12 by the guide rollers 13 and 14 provided in the container 12, so that it is stitched and integrated by the fluororesin yarn. The thermosetting synthetic resin varnish 11 is applied to the surfaces of the PTFE fiber woven fabric 4a and the organic fiber woven fabric 4b. Next, the PTFE fiber woven fabric 4a and the organic fiber woven fabric 4b, which are coated with the thermosetting synthetic resin varnish 11 and stitched together by fluororesin yarn, are applied to the compression rolls 16 and 17 by the feed roller 15. The thermosetting synthetic resin varnish 11 which is fed and applied to the surfaces of the woven fabrics 4a and 4b by the compression rolls 16 and 17 is impregnated into the fiber structure gap. The woven fabrics 4a and 4b impregnated with the thermosetting synthetic resin varnish 11 are subjected to a reaction of the resin at the same time as the solvent is blown in the drying furnace 18, whereby a moldable surface layer material prepreg (resin processing Substrate sheet) 20 is produced. The surface layer material 4 is produced by cutting the surface layer material prepreg 20 thus obtained into desired dimensions.

  As the organic fiber woven fabric 4b used for the surface layer material 4, a cotton fabric, an aramid fiber woven fabric, a polyester fiber woven fabric, a mixed woven fabric of cotton and polyester fibers, and the like are suitable. The woven fabric structure of the PTFE fiber woven fabric 4a and the organic fiber woven fabric 4b used for the surface layer material 4 is not particularly limited, and may be any of plain weave, oblique weave, satin weave, and the like.

  As the thermosetting synthetic resin, phenol resin, epoxy resin, unsaturated polyester resin, etc. are suitable, and as the volatile solvent of these thermosetting synthetic resins, thermosetting synthetic resin used such as methanol, acetone, methyl ethyl ketone, etc. Is appropriately selected. The solid content of the thermosetting synthetic resin varnish formed by dissolving the thermosetting synthetic resin in a volatile solvent is about 30 to 65% by weight, and the viscosity of the resin varnish is about 800 to 5000 cP. 1000 to 4000 cP is preferred.

  The surface layer material 4 impregnated with the thermosetting synthetic resin has the same desired dimension on one surface of a laminate obtained by cutting the prepreg 19 forming the base 2 into a desired dimension and stacking a plurality of them. The cut surface layer material prepreg 20 is placed with the woven fabric 4b side of the organic fiber facing, and is formed by heating and pressing in the laminating direction and integrally joining.

  A plurality of recesses 6 that are open at the surface 5 of the surface layer material 4 and extend to a part of the substrate 2 are formed on the substrate 2 and the surface layer material 4 that is integrally bonded to one surface 3 of the substrate 2. The Note that the surface 5 of the surface layer material 4 may be polished to remove the thermosetting synthetic resin applied to the surface 5.

  The plurality of recesses 6 which open at the surface 5 of the surface layer material 4 and extend to a part of the base 2 have a total area of the openings of the recesses 6 in the area of the surface 5 of the surface layer material 4 of 20 to 30%. It is formed to be a ratio. The recess 6 fills and holds a solid lubricant, which will be described later, and is a recess that occupies the area of the surface 5 of the surface material 4 in order to satisfactorily exhibit the sliding characteristics such as low friction of the solid lubricant. The total area of the six openings is at least 20%. However, if the total area of the openings of the recesses 6 occupying the area of the surface 5 of the surface layer material 4 exceeds 30%, the strength of the surface layer material 4 is reduced. The recess 6 is formed by drilling using a drill or the like.

  The solid lubricant that fills the plurality of recesses 6 that open at the surface 5 of the surface material 4 and extend to a part of the base 2 is 5-30 wt% silicone oil, 20-40 wt% silicone wax, and melamine shear It contains 20-40% by weight of nurate and 20-50% by weight of PTFE.

  The silicone wax in the solid lubricant component mainly serves to reduce the coefficient of friction, and also serves as a carrier that absorbs and retains silicone oil described below. Preferred examples of the silicone wax include dimethylpolysiloxane, methylphenylpolysiloxane, long-chain alkyl-modified polysiloxane, trifluoropropylsiloxane, and the like. Specific examples include “silicone wax W23 (trade name)” manufactured by Asahi Kasei Wacker Silicone. The blending ratio of the silicone wax is 20 to 40% by weight, preferably 25 to 30% by weight. When the blending ratio is less than 20% by weight, the desired low friction property cannot be obtained, and when it exceeds 40% by weight, the moldability is deteriorated and the strength of the molded body (solid lubricant) is decreased. descend.

  Silicone oils work with the silicone wax to improve low friction, especially when used under high load conditions. The silicone oil is preferably a dimethyl silicone oil or a silicone oil in which a part of the methyl group of dimethylpolysiloxane is substituted with a polyether group, a phenyl group, an alkyl group, an aralkyl group or a fluorinated alkyl group, and has a viscosity (25 ° C.). 100 to 50000 centistokes (cSt), preferably 500 to 10000 cSt, is preferably used. Specific examples include dimethyl silicone oil “FK96H (trade name)” manufactured by Shin-Etsu Chemical Co., Ltd. and dimethyl silicone oil “AK series (trade name)” manufactured by Asahi Kasei Wacker Silicone. Since most of this silicone oil is absorbed and retained by the above-mentioned silicone wax, a relatively large amount of the silicone oil can be blended. And the compounding ratio of a silicone oil is 5 to 30 weight%, Preferably it is 10 to 25 weight%. When the blending ratio is less than 5% by weight, the amount supplied to the sliding surface is small and the effect of improving the low friction property is not sufficiently exhibited in use under a high load condition, and more than 30% by weight. When it mix | blends, it may flow out (bleed out) at the time of shaping | molding, and there exists a possibility of reducing the shape retention of a molded object.

  Melamine cyanurate is an addition compound of melamine and cyanuric acid or isocyanuric acid. A 6-membered ring melamine molecule and cyanuric acid (isocyanuric acid) molecule are arranged in a plane by hydrogen bonds, and the plane has weak bonding strength. And has a cleaving property like molybdenum disulfide or graphite. This melamine cyanurate has the effect | action which improves the low friction property and abrasion resistance of a solid lubricant. And the mixture ratio of a melamine cyanurate is 20 to 40 weight%, Preferably it is 25 to 35 weight%. When the blending ratio is less than 20% by weight, the effect of improving the low friction property and the wear resistance is not sufficiently exhibited. When the blending ratio exceeds 40% by weight, the wear resistance may be lowered.

  PTFE mainly exerts an effect of imparting low friction. PTFE is PTFE mainly used for molding as molding powder or fine powder (hereinafter abbreviated as “high molecular weight PTFE”), and high molecular weight PTFE is decomposed by radiation irradiation or the molecular weight is adjusted during the polymerization of PTFE. Thus, PTFE, which has a molecular weight lower than that of high molecular weight PTFE, is easy to grind and has good dispersibility, and is mainly used as an additive material (hereinafter abbreviated as “low molecular weight PTFE”). Separated. As PTFE, high molecular weight PTFE alone or a mixture of high molecular weight PTFE and low molecular weight PTFE can be used. The blending ratio (weight) of the high molecular weight PTFE and the low molecular weight PTFE as a mixture is usually 1: 1 to 3: 1.

  As high molecular weight PTFE for molding powder, “Teflon (registered trademark) 7-J (trade name)”, “Teflon (registered trademark) 7A-J (trade name)”, “Teflon (manufactured by Mitsui DuPont Fluoro Chemical Co., Ltd.)” "Registered trademark" 70-J (trade name) "," Polyflon M-12 (trade name) "manufactured by Daikin Industries, Ltd.," Fluon G163 (trade name) "," Fluon G190 (trade name) "manufactured by Asahi Glass Or the like. As high molecular weight PTFE for fine powder, “Teflon (registered trademark) 6CJ (trade name)” manufactured by Mitsui & DuPont Fluoro Chemical Co., Ltd., “Polyflon F201 (trade name)” manufactured by Daikin Industries, Ltd., etc., manufactured by Asahi Glass Co., Ltd. “Full-on CD076 (product name)”, “Full-on CD090 (product name)”, and the like.

  Further, as the high molecular weight PTFE, in addition to the above high molecular weight PTFE, those obtained by modifying the high molecular weight PTFE with a styrene-based, acrylic ester-based, methacrylic ester-based, acrylonitrile-based polymer, etc. can be used. Examples thereof include “Metablene A-3000 (trade name)” manufactured by Mitsubishi Rayon Co., Ltd. Low molecular weight PTFE includes “TLP-10F (trade name)” manufactured by Mitsui DuPont Fluoro Chemical Co., “Lublon L-5 (trade name)” manufactured by Daikin Industries, Ltd., and “Fullon L169J (trade name) manufactured by Asahi Glass Co., Ltd. Product name) "and" KTL-8N (product name) "manufactured by Kitamura.

  The blending ratio of PTFE is 20 to 50% by weight, preferably 25 to 40% by weight. When the blending ratio of PTFE is less than 20% by weight, the desired low friction property cannot be obtained, and when the blending ratio exceeds 50% by weight, the wear resistance is deteriorated and the molded article is maintained. The formability deteriorates and the strength of the molded product is reduced.

  The solid lubricant having the above-described component composition is prepared by adding a predetermined amount of each component to a mixer such as a Henschel mixer, a super mixer, a ball mill, or a tumbler to obtain a mixture, and then mixing the obtained mixture in the components. The kneaded product is melt-kneaded at a temperature at which the silicone wax melts. The kneaded material is supplied onto the surface 5 of the surface layer material 4 which has an opening at the surface 5 of the surface layer material 4 and includes a plurality of recesses 6 extending to a part of the substrate 2 and is compression-molded at a predetermined pressure. After being filled in the recess 6, the kneaded material is solidified in the recess 6 by being held in this state for a predetermined time, and is held in the recess 6 as a solid lubricant 7.

  In this way, the base 2 made of a laminate of the fiber woven cloth reinforced thermosetting synthetic resin, the surface layer material 4 integrally bonded to one surface 3 of the base 2, and the surface 5 of the surface layer material 4 are opened. At the same time, the sliding member 1 including the solid lubricant 7 filled and held in the plurality of recesses 6 extending to a part of the base 2 is produced.

  A sliding seismic isolation device A using this sliding member 1 is shown in FIG. This sliding seismic isolation device A includes a laminated rubber body 20 formed by alternately laminating reinforcing layers 22 and rubber layers 21, and a sliding seismic isolation bearing 23 having a sliding member 1 fixed to the lower surface of the laminated rubber body 20, And a sliding plate 24 as a mating member slidably in contact with the sliding member 1 of the sliding seismic isolation bearing 23.

  The reinforcing layer 22 is vulcanized on each of a plurality of thin reinforcing plates (thin steel plates) 25 alternately laminated with the rubber layers 21 and vulcanized and bonded to the rubber layers 21, and the uppermost and lowermost rubber layers 21. A pair of thick reinforcing plates (thick steel plates) 26 are bonded, and the sliding member 1 is partially embedded in a rectangular recess 27 formed in one thick reinforcing plate 26. And is joined to the thick reinforcing plate 26 and fixed to the lower surface of the laminated rubber body 20, and the slip isolation bearing 23 is partially embedded in the other thick reinforcing plate 26 of the laminated rubber body 20. It is fixed to the upper structure B through a fixed shear key 28 and a flange plate 29 that engages with the shear key 28 and is integrated with the other thick reinforcing plate 26 through fastening means such as bolts. The sliding plate 24 is fixed to the lower structure C. The surface 5 of the surface layer material 4 of the sliding member 1 and the surface of the solid lubricant 7 on the surface 5 side are in slidable contact with a sliding plate 24 fixed to the lower structure C.

  Next, the present invention will be described in detail based on examples. In addition, this invention is not limited to these Examples at all.

[Preparation of base for sliding member]
A plain woven cotton cloth is prepared as a reinforcing fiber woven cloth, and the cotton cloth is passed by a feed roller through a container storing a phenol resin varnish having a resin solid content of 64.5% by weight, and the resin varnish is applied to the surface of the cotton cloth. After impregnating the resin varnish coated on the surface of the cotton cloth with a compression roll to the gap between the fiber structures, the solvent is dissipated in the drying furnace and the reaction of the resin proceeds to obtain a prepreg (resin-treated cotton cloth). It was. This prepreg was cut into a rectangular shape with a side length of 30 mm, and 10 sheets thereof were overlapped.

[Production of surface material of sliding member]
A plain woven PTFE fiber woven fabric and a plain woven cotton fabric similar to the above were prepared, and the PTFE fiber woven fabric and the cotton fabric were overlapped. A PTFE yarn having a thickness of 400 denier was prepared, and the overlapped PTFE fiber woven fabric and plain woven cotton fabric were sewn together in the overlapping direction and integrated by stitching. The integrated PTFE fiber woven fabric and plain woven cotton fabric are passed through a container in which a phenol resin varnish having a resin solid content of 64.5% by weight is passed by a feed roller, and the integrated PTFE fiber woven fabric and plain woven cotton fabric are Resin varnish is coated on the surface, and the resin varnish coated on the surface of the PTFE fiber woven fabric and plain woven cotton fabric integrated by a compression roll is impregnated into the fiber structure gap, and then the solvent is removed in a drying furnace. Simultaneously with the dispersion, the reaction of the resin was advanced to obtain a surface layer material prepreg (resin-processed PTFE fiber woven fabric and cotton fabric). This surface layer material prepreg was cut into a square shape having a side length of 30 mm.

The plain woven cotton cloth side of the surface layer material prepreg is placed on the prepreg, and compression-molded in the thickness direction (overlapping direction) under conditions of a molding pressure of 70 kg / cm ² , a molding temperature of 160 ° C., and a molding time of 10 minutes, The substrate and the surface layer material were joined together (the thickness of the substrate was 9 mm, the thickness of the surface layer material was 0.7 mm).

  This integrally bonded base body and surface layer material are drilled to form four circular recesses having a diameter of 8 mm and a depth of 0.9 mm (the total area of the openings of the recesses in the surface area of the surface layer material is about 22%).

(Production of solid lubricant)
Production of Solid Lubricant (1) Asahi Kasei Wacker Silicone Co., Ltd. presents 10-25% by weight of dimethyl silicone oil “KF96H (trade name)” manufactured by Shin-Etsu Chemical Co., Ltd. as a silicone oil and a viscosity of 300 cSt at 50 ° C. as a silicone wax. “Silicone Wax W23 (trade name)” manufactured by 25-30% by weight, “MCA (trade name)” 25% by weight made by Mitsubishi Chemical as melamine cyanurate, and high molecular weight PTFE “Fluon” made by Asahi Glass Co., Ltd. as PTFE G163 (trade name) ”of 25 to 40% by weight was charged into a Henschel mixer to prepare a mixture. The obtained mixture was heated to a temperature of 80 ° C. above the melting point of the silicone wax in the component, and melt kneaded to prepare a solid lubricant kneaded product. The component composition of this solid lubricant kneaded product is shown in Table 1.

Preparation of solid lubricant (2) 10-25 wt% silicone oil (same as above), 25 wt% silicone wax (same as above), 25 wt% melamine cyanurate (same as above), high PTFE A molecular weight PTFE (same as above) of 12.5 to 20% by weight and a low molecular weight PTFE (“Fluon L169J (trade name)” manufactured by Asahi Glass Co., Ltd.) of 12.5 to 20% by weight are charged into a Henschel mixer to prepare a mixture. did. The obtained mixture was heated to a temperature of 80 ° C. above the melting point of the silicone wax in the component, and melt kneaded to prepare a solid lubricant kneaded product. The component composition of this solid lubricant kneaded product is shown in Table 2.

[Production of sliding members]
In a sliding member material comprising a substrate, a surface layer material integrally bonded to one surface of the substrate, and a plurality of (four) recesses that open at the surface of the surface material and extend to a part of the substrate. After supplying the kneaded product of the solid lubricants (1) and (2) to the surface of the surface layer material, the sliding member material and the kneaded product are compressed in the thickness direction so that the solid lubricants (1) and (2) The kneaded product was filled into a circular recess. Next, the solid lubricant kneaded material filled in the circular recesses is allowed to stand at room temperature until solidified, and then the solid lubricant adhering to the surface of the surface layer material excluding the circular recesses is removed, and these are removed from the sliding members (1) to ( 8).

[Comparative example]
Comparative Example 1
PTFE fiber (400 denier) and glass fiber (101 denier) are woven (obliquely weave) in a woven fabric (70% proportion of PTFE fiber on the surface, 30% proportion of glass fiber) and phenol resin varnish (concentration 55) %) Was impregnated with 30% by weight (as a solid content) and dried to obtain a surface layer material, and the surface layer material prepreg was cut into a rectangular shape with a side length of 30 mm.

  A prepreg was prepared by impregnating a blended fabric made of thermoplastic polyester fibers (65%) and cotton fibers (35%) with 45% by weight (as a solid content) of a phenol resin varnish (same as above) and drying. The prepreg was cut into a square shape having a side length of 30 mm, and 10 sheets thereof were overlapped.

A surface layer material prepreg was placed on the prepreg, and compression molded in the thickness direction (overlapping direction) under conditions of a molding pressure of 50 kg / cm ² , a molding temperature of 150 ° C., and a molding time of 5 minutes. Were joined together as a sliding member.

Comparative Example 2
As a woven fabric, an aramid fiber woven fabric obtained by plain weaving copolyparaphenylene 3,4′oxydiphenylene terephthalamide resin fiber (“Technola (trade name)” manufactured by Teijin Ltd.) is prepared. A feed roller is passed through a container in which a mixed resin varnish of epoxy resin and PTFE (“Lublon L5 (trade name)” manufactured by Daikin Industries, Ltd.) is stored, and the mixed resin varnish is placed on the surface of the aramid fiber woven fabric. After impregnating the mixed resin varnish applied to the surface of the aramid fiber woven fabric with a compression roll to the fiber structure gap, the solvent is dissipated in the drying furnace and the reaction of the resin proceeds. A surface layer material prepreg composed of 30% by weight of aramid fiber woven fabric, 31% by weight of PTFE and 39% by weight of epoxy resin was produced. This surface layer material prepreg was cut into a rectangular shape with a side length of 30 mm, and this was used as a surface layer material.

A surface layer material is placed on a substrate formed by stacking 10 prepregs cut into a rectangular shape with a side length of 30 mm, and the molding pressure is 70 kg / cm ^{2 in} the thickness direction and the molding temperature is 160. Compression molding was performed at a temperature of 10 ° C. and a molding time of 10 minutes, and the substrate and the surface layer material were joined together to form a sliding member.

  Next, the sliding performance was tested under the test conditions shown in Table 3 for the sliding members (1) to (8) and the sliding members of Comparative Examples 1 and 2.

(Table 3)
Test conditions Surface pressure 20 N / mm ² (200 kgf / cm ² )
Speed 30mm / sec ~ 500mm / sec
Mating material SUS304
Lubrication The sliding members (1) to (8) and the sliding member of Comparative Example 2 were not lubricated.
For the sliding member of Comparative Example 1, apply grease to the sliding surface. Test method Fix the mating material on the base of the biaxial testing machine, and slidably contact the mating material with the mating material. A load was applied so that the pressure was 20 N / mm ² (constant), the counterpart material side was vibrated at the above speed (stroke ± 100 mm), and the coefficient of friction at each speed was measured.

  Table 4 shows the test results of the sliding members (1) to (8) and the sliding members of Comparative Examples 1 and 2 performed under the above test conditions.

  The above test conditions are tests on speed dependence, and as can be seen from the test results, in the sliding members of Examples 1 to 8, the variation of the friction coefficient with respect to the speed change is extremely small. While the results showed that the dependence was extremely small, in the sliding members of Comparative Examples 1 and 2, the friction coefficient was high throughout the test time, and an increase in the friction coefficient was observed as the speed changed. The result showed that it was inferior.

  From the above test results, by applying the sliding members of Examples 1 to 8 to the sliding seismic isolation device, it is possible to lengthen the seismic isolation cycle while keeping the sliding acceleration small, and from the vibration caused by a large-scale earthquake. It is possible to reduce the transmission of vibration to the structure against vibration caused by a small-scale earthquake or the like and achieve reliable protection of the structure.

It is a top view of the sliding member of this invention. It is the II sectional view explanatory drawing of FIG. It is a top view which shows a surface layer material. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is explanatory drawing which shows the manufacturing process of the base | substrate and surface layer material of a sliding member. It is a perspective view which shows the lamination state of a prepreg. It is a top view of the other example of a sliding member. It is sectional drawing of the sliding seismic isolation apparatus which uses a sliding member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding member 2 Base | substrate 4 Surface layer material 6 Recessed part 7 Solid lubricant A Sliding seismic isolation device 20 Laminated rubber body 23 Sliding seismic isolation bearing 24 Sliding plate

Claims (11)

  A substrate made of a laminate of a fiber woven fabric reinforced thermosetting synthetic resin, a woven fabric of ethylene tetrafluoride resin and a woven fabric of organic fiber are superposed and integrated by stitching with a fluororesin yarn and heated. A surface layer material impregnated with a curable synthetic resin and bonded to one surface of the substrate on the woven fabric side of the organic fiber, and the substrate and the surface layer material open to the surface layer material and extend to a part of the substrate. It comprises at least one formed recess, and a solid lubricant filled and held in the recess. The solid lubricant is composed of 5 to 30% by weight of silicone oil, 20 to 40% by weight of silicone wax, and 20 to 40 of melamine cyanurate. A sliding member comprising: wt% and ethylene tetrafluoride resin 20 to 50 wt%.   The sliding member according to claim 1, wherein the organic fiber woven fabric is selected from one of cotton fabric, aramid fiber woven fabric, polyester fiber woven fabric, and a mixed woven fabric of cotton and polyester fibers.   The sliding member according to claim 1 or 2, wherein the fluororesin yarn is selected from any of a tetrafluoroethylene resin yarn and a yarn made of ethylene tetrafluoride / hexafluoropropylene copolymer.   The sliding member according to any one of claims 1 to 3, wherein the fluororesin yarn is one of single yarn and spinning, and is generally in the range of 200 to 1,200 denier. Forming a substrate made of a laminate in which a plurality of prepregs obtained by applying a thermosetting synthetic resin varnish to a woven fabric made of at least one of organic fibers and inorganic fibers are laminated;
Preparing a woven fabric of tetrafluoroethylene resin fiber and a woven fabric of organic fiber, and superposing the woven fabric of tetrafluoroethylene resin fiber and the woven fabric of organic fiber together with the woven fabric overlapped with fluororesin A step of forming a surface layer material prepreg by impregnating and applying a thermosetting synthetic resin varnish after stitching in the overlapping direction by yarn-making,
A step of placing the surface layer material prepreg on one surface of the substrate on the woven fabric side of the organic fiber and heating and pressure forming the surface layer material prepreg and the substrate to integrally bond the surface layer material to the surface of the substrate; ,
Forming at least one recess opening in the surface layer material and the substrate at the surface of the surface layer material and extending to a part of the substrate;
A solid lubricant kneaded product is prepared by mixing 5 to 30% by weight of silicone oil, 20 to 40% by weight of silicone wax, 20 to 40% by weight of melamine cyanurate, and 20 to 50% by weight of ethylene tetrafluoride resin in a mixer. And a process of
Supplying a solid lubricant kneaded product to the surface layer material including the recess, compressing the solid lubricant kneaded product, and filling the recess;
The manufacturing method of the sliding member as described in any one of Claim 1 to 4 containing these.   The method for manufacturing a sliding member according to claim 5, wherein the organic fiber includes at least one of cotton fiber, aramid fiber, and polyester fiber.   The method for manufacturing a sliding member according to claim 5 or 6, wherein the inorganic fiber includes at least one of glass fiber and carbon fiber.   The woven fabric made of ethylene tetrafluoride resin and the woven fabric made of organic fibers are stitched together by one of the following methods: fluorine stitching, side stitching, reverse stitching, half reverse stitching, and stitching stitching. The manufacturing method of the sliding member as described in any one of Claim 5 to 7.   The sliding member according to any one of claims 5 to 8, wherein the fluororesin yarn is selected from any one of an ethylene tetrafluoride resin yarn and a yarn made of ethylene tetrafluoride / hexafluoropropylene copolymer. Production method.   The method for producing a sliding member according to any one of claims 5 to 9, wherein the fluororesin yarn is one of single yarn and spinning, and is generally in the range of 200 to 1,200 denier.   A sliding seismic isolation device disposed between an upper structure and a lower structure, wherein a reinforcing layer and a rubber layer are alternately laminated, and one of the upper structure and the lower structure A laminated rubber body fixed to one of the upper surface and the lower surface, a sliding plate fixed to the other of the upper structure and the lower structure, and an upper surface and a lower surface of the laminated rubber body 5. The solid lubricant that is fixed to any one of the two and that is filled and held in a recess that opens on the surface of the surface layer material and slidably contacts the sliding plate. 6. A sliding seismic isolation device comprising a sliding member.

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