JP2007064362A - Lubricant-holding member and method for forming lubricant-holding member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a lubricant-holding member capable of suitably lubricating a sliding contact face with which a predetermined sliding contact member is brought into sliding contact, and a method for forming the lubricant-holding member. <P>SOLUTION: By injecting fluid urethane foam into a lubricant-holding space 22a positioned in the sliding contact side brought into sliding contact with a predetermined shaft member 1 in a bearing 2a brought into sliding contact with the shaft member 1 and solidifying the urethane foam, the lubricant-holding member 25a comprising the urethane foam which is a porous resin material capable of impregnating and holding lubricant is formed in the lubricant-holding space 22a. By applying the lubricant held by the lubricant-holding member 25a to the sliding contact face between the shaft member 1 and the bearing 2a, the sliding contact face can be lubricated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lubricant holding member and a lubricant holding member forming method.

  Conventionally, in order to lubricate the portion of the sewing machine where the needle bar that moves up and down in the axial direction and the sewing machine frame are in sliding contact with each other, a felt or oil core that holds lubricating oil or grease as a lubricant is brought into contact with the needle bar. A technique for arranging them is known (see, for example, Patent Document 1).

Further, as shown in FIGS. 7A and 7B, in a pin 200 that pivotally supports a link, a rod, or the like as a predetermined sliding contact member on its peripheral surface, the inner space 220 of the pin 200 is lubricated. By disposing the lubricant holding member 250 such as felt or oil core impregnated with the agent, the lubricant that exudes from the lubricant holding member 250 passes through the communication hole 220a that communicates with the internal space 220 of the pin 200. A pin is known which is adapted to be supplied to the peripheral surface.
Further, as shown in FIGS. 8A, 8B, and 8C, in a pin 201 that pivotally supports a link, a rod, or the like as a predetermined sliding contact member on its peripheral surface, the pin 201 A pin that supplies grease G to the peripheral surface of the pin 201 through a communication hole 221a that communicates with the internal space 221 by sealing the grease G in the internal space 221 with the metal plug 300 is known. ing.
JP-A-2005-192698

However, in the case of the technique of disposing the lubricant holding member 250 in the internal space 220 of the pin 200 in the above prior art, when inserting the lubricant holding member 250 into the through hole that is the internal space 220 of the pin 200, The lubricant holding member 250 is suitably inserted and disposed at a predetermined position on the inner surface of the pin 200 so that the fiber surface such as felt or oil core as the lubricant holding member 250 is rubbed and caught on the inner surface of the pin 200. It could be difficult to do. On the other hand, when the diameter of the through hole is increased so that the lubricant holding member 250 can be easily inserted into the through hole of the pin 200, the lubricant holding member 250 is detached from the pin 200 and falls off with the operation of the device including the pin 200. I had to do it.
Further, in the case of the technique of sealing grease G in the internal space 221 of the pin 201 with the metal plug 300 in the above-described prior art, the dimensional change such that the outer peripheral side of the pin 201 swells when the metal plug 300 is press-fitted into the pin 201. In some cases, a malfunction occurs when the sliding contact member is assembled to the peripheral surface of the pin 201, and a malfunction occurs in the operation of the sliding contact member pivotally supported by the pin 201. Furthermore, since the grease G is not held by the lubricant holding member, it easily flows out and may be excessively supplied to the peripheral surface (sliding contact surface) of the pin 201.

  An object of the present invention is to provide a lubricant holding member and a lubricant holding member forming method capable of suitably lubricating a sliding contact surface with which a predetermined sliding contact member is in sliding contact.

  In order to solve the above problems, the invention according to claim 1 is a lubricant holding member provided in a lubricant holding space in which a lubricant to be supplied to a surface in which a predetermined sliding contact member is in sliding contact is stored, The lubricant holding member is made of a porous resin material that can be impregnated with a lubricant formed by injecting a resin foam into the lubricant holding space.

According to the first aspect of the present invention, the lubricant holding member is made of a porous resin material which can be impregnated with a lubricant, which is formed by injecting a resin foam into the lubricant holding space.
Then, the lubricant can be supplied from the lubricant holding space in which the lubricant holding member is provided to the surface where the predetermined sliding contact member comes into sliding contact.

  According to a second aspect of the present invention, in the lubricant holding member according to the first aspect, the lubricant holding member is configured to communicate with a peripheral surface of a shaft member that pivotally supports a predetermined sliding contact member on the peripheral surface thereof. It is provided in a lubricant holding space formed inside the axial center of the member.

  According to the invention described in claim 2, while having the same effect as that of the invention described in claim 1, the lubricant holding member is provided on the peripheral surface of the shaft member that pivotally supports the predetermined sliding contact member on the peripheral surface thereof. It is made of a porous resin material that can be impregnated with a lubricant formed by injecting a resin foam into a lubricant holding space formed inside the shaft center side of the shaft member so as to communicate with each other.

  According to a third aspect of the present invention, in the lubricant holding member according to the first aspect, the lubricant holding member is formed on the surface of the sliding contact member that is in sliding contact with the predetermined shaft member, on the surface side that is in sliding contact with the shaft member. It is provided in the agent holding space.

  According to the third aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and the lubricant holding member is a surface in sliding contact with the predetermined shaft member in the sliding contact member. It is made of a porous resin material that can be impregnated with a lubricant and is formed by injecting a resin foam into the lubricant holding space on the side.

  According to a fourth aspect of the present invention, in the lubricant holding member according to the first aspect, the lubricant holding member is a lubricant formed on a surface side in sliding contact with the sliding contact member of the shaft member that is in sliding contact with the predetermined sliding contact member. It is provided in the agent holding space.

  According to the fourth aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and the lubricant holding member is in sliding contact with the sliding contact member in the shaft member that is in sliding contact with the predetermined sliding contact member. It is made of a porous resin material that can be impregnated with a lubricant formed by injecting a resin foam into the lubricant holding space on the surface side.

  According to a fifth aspect of the present invention, in the lubricant holding member according to any one of the first to fourth aspects, the resin holding foam is injected into the lubricant flow path leading to the lubricant holding space. And a lubricant supply member formed integrally with the lubricant holding member by a porous resin material.

  According to the fifth aspect of the present invention, the lubricant holding member has the same function as that of any one of the first to fourth aspects, and the lubricant holding member is a lubricant holding space provided with the lubricant holding member. And a lubricant supply member formed integrally with the lubricant holding member.

  A sixth aspect of the present invention is the lubricant holding member according to any one of the first to fifth aspects, wherein the porous resin material is urethane foam.

  According to the invention described in claim 6, the porous resin material constituting the lubricant holding member is urethane foam while exhibiting the same action as that of the invention described in any one of claims 1 to 5. .

  The invention according to claim 7 is a method for forming a lubricant holding member, wherein lubrication is performed by injecting urethane foam into a lubricant holding space for storing a lubricant to be supplied to a surface in which a predetermined sliding contact member is in sliding contact. A lubricant holding member made of foamed urethane that can be impregnated with a lubricant is formed in the agent holding space.

According to the seventh aspect of the present invention, by injecting urethane foam into the lubricant holding space, a lubricant holding member made of foamed urethane that can be impregnated with the lubricant can be formed in the lubricant holding space.
Then, the lubricant can be supplied from the lubricant holding space in which the lubricant holding member is provided to the surface where the predetermined sliding contact member comes into sliding contact.

  According to an eighth aspect of the present invention, in the lubricant holding member forming method according to the seventh aspect, the lubricant holding space communicates with a peripheral surface of a shaft member that pivotally supports a predetermined sliding contact member on the peripheral surface thereof. And a lubricant holding space formed in the shaft center side of the shaft member.

  According to the invention described in claim 8, the shaft member has the same effect as that of the invention described in claim 7, and communicates with the peripheral surface of the shaft member that pivotally supports the predetermined sliding contact member on the peripheral surface thereof. By injecting urethane foam into the lubricant holding space formed inside the shaft center side, a lubricant holding member made of foamed urethane capable of impregnating the lubricant in the lubricant holding space can be formed.

  According to a ninth aspect of the present invention, in the lubricant holding member forming method according to the seventh aspect, the lubricant holding space is formed on a surface side in sliding contact with the shaft member in the sliding contact member in sliding contact with the predetermined shaft member. It is a lubricant holding space.

  According to the ninth aspect of the invention, the same effect as that of the seventh aspect of the invention can be achieved, and the urethane foam is injected into the lubricant holding space on the surface side in sliding contact with the shaft member in the sliding contact member. A lubricant holding member made of urethane foam that can be impregnated with a lubricant can be formed in the lubricant holding space.

  According to a tenth aspect of the present invention, in the lubricant holding member forming method according to the seventh aspect, the lubricant holding space is formed on a surface side in sliding contact with the sliding contact member of the shaft member sliding in contact with the predetermined sliding contact member. It is characterized by being a lubricant holding space.

  According to the invention described in claim 10, the same effect as that of the invention described in claim 7 is achieved, and the urethane foam is injected into the lubricant holding space on the surface side of the shaft member that is in sliding contact with the sliding contact member. A lubricant holding member made of urethane foam that can be impregnated with a lubricant can be formed in the lubricant holding space.

According to the first aspect of the present invention, the lubricant holding member is made of a porous resin material which can be impregnated with a lubricant, which is formed by injecting a resin foam into the lubricant holding space.
Since the lubricant holding member is made of a porous resin material that can be impregnated with the lubricant, the lubricant holding member can be impregnated and held with the lubricant supplied to the lubricant holding member.
In other words, by providing the lubricant holding space with the lubricant holding member capable of impregnating and holding the lubricant, the lubricant that oozes out from the lubricant holding member is supplied to the predetermined sliding contact member from the lubricant holding space. It becomes possible to supply to the sliding surface, and the sliding surface can be suitably lubricated.

Further, since the lubricant holding member made of a porous resin material that can be impregnated with the lubricant can be formed by injecting a resin foam into the lubricant holding space, the sliding contact with the predetermined sliding contact member is possible. It is easy to form and arrange in the lubricant holding space corresponding to the contact surface.
Specifically, for example, a resin foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the resin foam is solidified after a predetermined time, thereby forming a sponge-like foam rubber or the like. Since the lubricant holding member made of the porous resin material is formed, the lubricant holding member can be easily disposed even in the lubricant holding space such as a narrow hole or a gap.
Also, since the lubricant holding member can be formed according to the size and shape of the lubricant holding space, there is no problem that the lubricant holding member falls off and comes off from the lubricant holding space. Can suitably lubricate the sliding surface.

According to the second aspect of the present invention, the lubricant holding member is formed inside the shaft center side of the shaft member so as to communicate with the peripheral surface of the shaft member that pivotally supports the predetermined sliding contact member on the peripheral surface thereof. It is made of a porous resin material which can be impregnated with a lubricant, which is formed by injecting a resin foam into the lubricant holding space.
Since the lubricant holding member is made of a porous resin material that can be impregnated with the lubricant, the lubricant holding member can be impregnated and held with the lubricant supplied to the lubricant holding member.
In other words, the shaft member that pivotally supports the predetermined sliding contact member on the peripheral surface thereof has a lubricant in the lubricant holding space formed inside the shaft center side so as to communicate with the peripheral surface of the shaft member. Since the lubricant holding member that can be impregnated and held is provided, the lubricant that oozes out from the lubricant holding member is applied to the peripheral surface of the shaft member that the predetermined sliding contact member slides from the lubricant holding space. It becomes possible to supply, and the sliding contact surface can be suitably lubricated.

Further, the lubricant holding member made of a porous resin material that can be impregnated with the lubricant can be formed by injecting resin foam into the lubricant holding space formed in the shaft member. It is easy to form and arrange in the lubricant holding space inside the shaft side.
Specifically, for example, a resin foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the resin foam is solidified after a predetermined time, thereby forming a sponge-like foam rubber or the like. Since the lubricant holding member made of the porous resin material is formed, the lubricant holding member can be easily disposed even in a narrow and narrow lubricant holding space such as a through hole of the shaft member. be able to.
Also, since the lubricant holding member can be formed according to the size and shape of the lubricant holding space, there is no problem that the lubricant holding member falls off and comes off from the lubricant holding space. Can suitably lubricate the sliding surface.

According to the invention of claim 3, the lubricant holding member is formed by injecting the resin foam into the lubricant holding space on the surface side in sliding contact with the shaft member in the sliding contact member in sliding contact with the predetermined shaft member. It is made of a porous resin material that can be impregnated with a lubricant.
Since the lubricant holding member is made of a porous resin material that can be impregnated with the lubricant, the lubricant holding member can be impregnated and held with the lubricant supplied to the lubricant holding member.
In other words, the sliding contact member that is in sliding contact with the predetermined shaft member includes a lubricant holding member that can impregnate and hold the lubricant in the lubricant holding space formed in the sliding contact member. The member can lubricate the sliding contact surface suitably by supplying the lubricant by applying a lubricant to the sliding contact surface where the shaft member and the sliding contact member are in sliding contact.

Further, since the lubricant holding member made of a porous resin material that can be impregnated with the lubricant can be formed by injecting resin foam into the lubricant holding space formed in the sliding contact member, the shaft member It is easy to form and arrange in the lubricant holding space on the sliding contact surface where the sliding contact member and the sliding contact member are in sliding contact.
Specifically, for example, a resin foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the resin foam is solidified after a predetermined time, thereby forming a sponge-like foam rubber or the like. Therefore, the lubricant holding member can be easily disposed even in the lubricant holding space such as the gap between the shaft member and the sliding contact member. be able to.
Also, since the lubricant holding member can be formed according to the size and shape of the lubricant holding space, there is no problem that the lubricant holding member falls off and comes off from the lubricant holding space. Can suitably lubricate the sliding surface.

According to the fourth aspect of the present invention, the lubricant holding member is formed by injecting the resin foam into the lubricant holding space on the surface side of the shaft member that is in sliding contact with the predetermined sliding contact member. And made of a porous resin material that can be impregnated with a lubricant.
Since the lubricant holding member is made of a porous resin material that can be impregnated with the lubricant, the lubricant holding member can be impregnated and held with the lubricant supplied to the lubricant holding member.
In other words, the shaft member that is in sliding contact with the predetermined sliding contact member includes the lubricant holding member that can impregnate and hold the lubricant in the lubricant holding space formed in the shaft member. The lubricant can be suitably lubricated by supplying the lubricant by applying a lubricant to the sliding contact surface where the shaft member and the sliding contact member are in sliding contact.

Further, the lubricant holding member made of a porous resin material that can be impregnated with the lubricant can be formed by injecting a resin foam into the lubricant holding space formed in the shaft member. It is easy to form and arrange in the lubricant holding space on the sliding contact surface where the sliding contact member comes into sliding contact.
Specifically, for example, a resin foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the resin foam is solidified after a predetermined time, thereby forming a sponge-like foam rubber or the like. Therefore, the lubricant holding member can be easily disposed even in the lubricant holding space such as the gap between the shaft member and the sliding contact member. be able to.
Also, since the lubricant holding member can be formed according to the size and shape of the lubricant holding space, there is no problem that the lubricant holding member falls off and comes off from the lubricant holding space. Can suitably lubricate the sliding surface.

According to the fifth aspect of the present invention, the lubricant holding member is lubricated by the porous resin material in which the resin foam is injected into the lubricant flow path communicating with the lubricant holding space provided with the lubricant holding member. A lubricant supply member formed integrally with the agent holding member;
In other words, since the lubricant flow path is provided with a lubricant supply member that is molded integrally with the lubricant holding member, for example, when the lubricant is injected into the lubricant flow path from the lubricant reservoir The lubricant supply member can absorb the lubricant and supply the lubricant to the lubricant holding member integral with the lubricant supply member.
Accordingly, the lubricant supply member included in the lubricant holding member supplies the lubricant injected into the lubricant flow path to the lubricant holding member in the lubricant holding space in an appropriate manner by utilizing the principle of capillary action. The amount can be supplied at a supply speed.

According to invention of Claim 6, the porous resin material which comprises a lubricant holding member is urethane foam.
That is, urethane foam is a sponge-like porous resin material by injecting urethane foam, which is a foam-like fluid material having fluidity, into the lubricant holding space and solidifying the urethane foam after a predetermined time has elapsed. It is a material that can be easily molded as foamed urethane, and is a material that can suitably hold the lubricant by the innumerable bubbles of the foamed urethane, making it suitable as a material constituting the lubricant holding member. Therefore, it is possible to lubricate the sliding contact surface and the like.

According to the seventh aspect of the present invention, by injecting urethane foam into the lubricant holding space, a lubricant holding member made of foamed urethane that can be impregnated with the lubricant can be formed in the lubricant holding space.
Specifically, urethane foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the urethane foam is solidified after a lapse of a predetermined time, whereby foaming, which is a sponge-like porous resin material. A lubricant holding member made of urethane can be easily formed and disposed in the lubricant holding space.
In addition, by injecting urethane foam into the lubricant holding space, a lubricant holding member can be formed according to the size and shape of the lubricant holding space, so that the lubricant holding member falls off from the lubricant holding space. Or the sliding contact surface can be suitably lubricated by the lubricant holding member.

According to the eighth aspect of the present invention, in the lubricant holding space formed inside the shaft center side of the shaft member so as to communicate with the peripheral surface of the shaft member pivotally supported on the peripheral surface of the predetermined sliding contact member. By injecting urethane foam, a lubricant holding member made of urethane foam that can be impregnated with the lubricant can be formed in the lubricant holding space.
Specifically, urethane foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the urethane foam is solidified after a lapse of a predetermined time, whereby foaming, which is a sponge-like porous resin material. A lubricant holding member made of urethane can be easily formed and disposed in the lubricant holding space.
In addition, by injecting urethane foam into the lubricant holding space, a lubricant holding member can be formed according to the size and shape of the lubricant holding space, so that the lubricant holding member falls off from the lubricant holding space. Or the sliding contact surface can be suitably lubricated by the lubricant holding member.

  In addition, a lubricant holding member made of urethane foam that can be impregnated and held in a lubricant holding space in a shaft member that pivotally supports a predetermined sliding contact member on its peripheral surface can be formed. The lubricant holding member supplies the lubricant to the sliding contact surface that is the peripheral surface of the shaft member, whereby the sliding contact surface can be suitably lubricated. In particular, since the lubricant holding member can suitably hold the lubricant by the innumerable bubbles of the urethane foam, the sliding contact surface can be well lubricated.

According to the ninth aspect of the present invention, the foamed urethane capable of impregnating the lubricant holding space with the lubricant by injecting the urethane foam into the lubricant holding space on the surface side in sliding contact with the shaft member. A lubricant holding member can be formed.
Specifically, urethane foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the urethane foam is solidified after a lapse of a predetermined time, whereby foaming, which is a sponge-like porous resin material. A lubricant holding member made of urethane can be easily formed and disposed in the lubricant holding space.
In addition, by injecting urethane foam into the lubricant holding space, a lubricant holding member can be formed according to the size and shape of the lubricant holding space, so that the lubricant holding member falls off from the lubricant holding space. Or the sliding contact surface can be suitably lubricated by the lubricant holding member.

  In addition, a lubricant holding member made of urethane foam that can be impregnated and held in a lubricant can be formed in a lubricant holding space in a sliding contact member that is in sliding contact with a predetermined shaft member. When the member supplies the lubricant by, for example, applying a lubricant to the sliding contact surface where the shaft member and the sliding contact member are in sliding contact, the sliding contact surface can be suitably lubricated. In particular, since the lubricant holding member can suitably hold the lubricant by the innumerable bubbles of the urethane foam, the sliding contact surface can be well lubricated.

According to the invention of claim 10, the urethane foam in which the lubricant holding space can be impregnated with the lubricant by injecting the urethane foam into the lubricant holding space on the surface side of the shaft member that is in sliding contact with the sliding contact member. A lubricant holding member can be formed.
Specifically, urethane foam, which is a foam-like fluid material having fluidity, is injected into the lubricant holding space, and the urethane foam is solidified after a lapse of a predetermined time, whereby foaming, which is a sponge-like porous resin material. A lubricant holding member made of urethane can be easily formed and disposed in the lubricant holding space.
In addition, by injecting urethane foam into the lubricant holding space, a lubricant holding member can be formed according to the size and shape of the lubricant holding space, so that the lubricant holding member falls off from the lubricant holding space. Or the sliding contact surface can be suitably lubricated by the lubricant holding member.

  In addition, a lubricant holding member made of urethane foam that can be impregnated and held in a lubricant can be formed in a lubricant holding space in a shaft member that is in sliding contact with a predetermined sliding contact member. When the member supplies the lubricant by, for example, applying a lubricant to the sliding contact surface where the shaft member and the sliding contact member are in sliding contact, the sliding contact surface can be suitably lubricated. In particular, since the lubricant holding member can suitably hold the lubricant by the innumerable bubbles of the urethane foam, the sliding contact surface can be well lubricated.

  Hereinafter, embodiments of a lubricant holding member and a lubricant holding member forming method according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a pin 2 that is a shaft member that pivotally supports a link, a rod, or the like as a predetermined sliding contact member on its peripheral surface.
1A is a side view of the pin 2, FIG. 1B is a cross-sectional view taken along line bb in FIG. 1A, and FIG. .

  As shown in FIGS. 1A to 1C, the pin 2 includes a pin main body 21, a lubricant holding space 22 penetrating in the longitudinal direction of the pin main body 21, and a lubricant holding space 22 from the outer surface side of the pin 2. And an oil hole 23 that is a lubricant flow path communicating with the lubricant, a lubricant holding member 25 filled in the lubricant holding space 22, and the like.

  The pin main body 21 supports a link, a rod, and the like so as to be slidably contacted with an outer peripheral surface that is a slidable contact surface, and holds a lubricant holding member 25 in a lubricant holding space 22 therein.

  The lubricant holding space 22 is a through hole along the axial direction of the pin 2, and is formed on the axial center side of the pin 2.

The oil hole 23 is used to supply a lubricant such as lubricating oil or grease from the outside of the pin 2 (pin body 21) to the lubricant holding space 22, or from the lubricant holding space 22 to the outer peripheral surface of the pin 2. It is the through-hole formed in order to ooze out.
In addition, since the pin 2 includes the lubricant holding member 25 in the lubricant holding space 22, the lubricant is supplied to the lubricant holding member 25 from the oil hole 23 so that the lubricant is lubricated. It is supplied to the holding space 22. Further, the lubricant that exudes from the lubricant holding member 25 provided in the lubricant holding space 22 is supplied from the oil hole 23 to the outer peripheral surface of the pin 2.

The lubricant holding member 25 is made of, for example, a porous resin material that can be impregnated with a lubricant such as lubricating oil or grease, which is formed by mixing countless bubbles in polyurethane, polyolefin, or the like. For example, the lubricant holding member 25 is made of polyurethane. Foamed urethane, foam rubber, or the like can be used.
The lubricant holding member 25 adjusts the kind of resin material (polyurethane) to be used and the ratio of bubbles mixed in the resin (polyurethane), and controls the density of the lubricant holding member 25 to thereby hold the lubricant. The hardness of the member 25 and the content of the lubricant that can be held by the lubricant holding member 25 can be adjusted.
The lubricant holding member 25 absorbs and holds the lubricant poured from the opening of the lubricant holding space 22.
The lubricant holding member 25 has durability and oil resistance which do not deteriorate even when the lubricant is impregnated for a long time and held.

Further, a lubricant supply member 26 formed integrally with the lubricant holding member 25 is provided in the oil hole 23.
The lubricant supply member 26 supplies the lubricant to the lubricant holding member 25 so as to absorb the lubricant injected into the oil hole 23 and soak the lubricant into the lubricant holding member 25. It has become. Further, the lubricant supply member 26 oozes out the lubricant held by the lubricant holding member 25 to the outer peripheral surface of the pin 2 through the oil hole 23.
The lubricant supply member 26 is made of the same porous resin material as the lubricant holding member 25.

  The pin 2 and the pin 2 are connected to the peripheral surface of the pin 2 through the lubricant supply member 26 by supplying the lubricant exuding from the lubricant holding member 25 provided in the lubricant holding space 22. It is possible to lubricate the slidable contact surface between the slidable contact members (for example, links and rods) that are in slidable contact with the peripheral surface of the two.

  Next, a lubricant holding member forming method in which the lubricant holding member 25 is formed and disposed in the lubricant holding space 22 will be described.

First, urethane foam, which is a resin foam having fluidity, is injected and poured into the pin body 21 in which the lubricant holding space 22 and the oil hole 23 are formed, and the urethane foam is poured. Is filled in the lubricant holding space 22 and the oil hole 23.
When a predetermined time elapses, the urethane foam is solidified, and a lubricant holding member 25 and a lubricant supply member 26 made of porous foamed urethane are formed in the lubricant holding space 22 and the oil hole 23.
The urethane foam (resin foam) referred to here is a foam material in which countless bubbles are mixed in a polyurethane material (resin material) dissolved in a predetermined solvent or a polyurethane material (resin material) before polymerization. It is a fluid substance. Then, the urethane foam (resin foam) is injected into the lubricant holding space 22 and the like, and then solidified and polymerized by being left for a predetermined time to become sponge-like foamed urethane (porous resin material). It is a molecular material.

Then, after the lubricant holding member 25 and the lubricant supply member 26 made of urethane foam are formed in the lubricant holding space 22 and the oil hole 23, the urethane foam portion that has excessively leaked from the lubricant holding space 22 and the oil hole 23. And the shapes of the lubricant holding member 25 and the lubricant supply member 26 are adjusted.
Next, the lubricant holding member 25 is impregnated with the lubricant so that the pin 2 including the lubricant holding member 25 made of foamed urethane is immersed in the lubricant bath.
Then, the pin 2 is inserted into the mounting hole of the predetermined sliding contact member, and the sliding contact member is disposed so as to be in sliding contact with the peripheral surface of the pin 2.

As described above, the lubricant holding member 25 provided in the pin 2 is easily formed by injecting a solid urethane foam into the lubricant holding space 22 from the oil hole 23 of the pin body 2 and solidifying it. Therefore, it is easy to arrange in the through hole of the pin 2.
Further, since the lubricant holding member 25 can be formed in accordance with the size and shape of the lubricant holding space 22, there is a problem that the lubricant holding member 25 falls off from the lubricant holding space 22 and is removed. The trouble that the dimensional change of the pin 2 occurs, such as the surface of 2 swells, is eliminated.
Since the lubricant holding member 25 is made of urethane foam, which is a porous resin material that can be impregnated with the lubricant, the lubricant holding member 25 is suitably held on the outer peripheral surface of the pin while suitably holding the lubricant. By supplying to a certain sliding contact surface, the sliding contact surface can be suitably lubricated.

(Embodiment 2)
Next, Embodiment 2 of the lubricant holding member and the lubricant holding member forming method according to the present invention will be described. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, and only a different part is demonstrated.

FIG. 2 shows a predetermined shaft member 1 and a bearing 2a as a predetermined sliding contact member that slidably supports the shaft member 1.
2A is a side view of the bearing 2a that supports the shaft member 1, and FIG. 2B is a cross-sectional view taken along the line bb of FIG. 1A.

  As shown in FIGS. 2A to 2B, the bearing 2 a that supports the predetermined shaft member 1 is formed on the bearing body 21 a and a plurality of (see FIG. 2) surfaces that are in sliding contact with the shaft member 1 in the bearing body 21 a. 2, three) lubricant holding spaces 22 a, oil holes 23 a that are lubricant passages from the outer surface side of the bearing 2 a (bearing body 21 a) to the lubricant holding spaces 22 a, and the lubricant holding spaces 22 a, respectively. A filled lubricant holding member 25a and the like are provided.

  The shaft member 1 is a drive shaft that advances and retreats in the axial direction and rotates and rotates around its axis in order to cause a drive mechanism or the like in a predetermined device to perform a predetermined operation.

When the bearing 2a is disposed at a predetermined position of a predetermined device, the bearing body 21a is fixed to a machine frame of the device and supports the shaft member 1 at the position.
The bearing main body 21a is provided with a lubricant holding space 22a for providing the lubricant holding member 25a on the inner surface side thereof.

  The lubricant holding space 22a is formed so as to be recessed by one step on the outer peripheral side of the bearing body 21a from the surface where the bearing body 21a is in sliding contact with the shaft member 1.

  Since the lubricant holding member 25a is the same as the lubricant holding member 25 of the first embodiment, description thereof is omitted.

  The bearing body 21a is formed with an oil hole 23a which is a lubricant flow path leading from the outer surface side of the bearing body 21a to the lubricant holding space 22a. The oil hole 23a includes a lubricant holding member 25a and the oil hole 23a. The same resin material is filled.

  Next, a lubricant holding member forming method for forming and arranging the lubricant holding member 25a in the lubricant holding space 22a will be described.

First, a predetermined shaft member is formed with respect to a temporary shaft for forming a lubricant holding member having the same shape and the same shaft diameter as that of the predetermined shaft member 1 in which the bearing main body 21a in which the lubricant holding space 22a and the oil hole 23a are formed. 1 (ie, a predetermined lubricant holding space 22a is disposed between the shaft member 1 and the bearing body 21a).
Next, urethane foam, which is a resin foam having fluidity, is poured from the oil holes 23a and poured into the lubricant holding space 22a, and the urethane foam is filled into the lubricant holding spaces 22a and the oil holes 23a.
When a predetermined time elapses, the urethane foam is solidified, and a lubricant holding member 25a made of porous foamed urethane is formed in the lubricant holding space 22a and the oil hole 23a.

Then, after a lubricant holding member 25a made of urethane foam or the like is formed in the lubricant holding space 22a or the oil hole 23a, the leakage from the lubricant holding space 22a or the oil hole 23a to the surface of the bearing 2a (bearing body 21a). The foamed urethane part is scraped off, the shape of the lubricant holding member 25a and the like is adjusted, and the temporary shaft is extracted.
Next, the lubricant holding member 25a is impregnated with the lubricant so that the bearing 2a including the lubricant holding member 25a made of urethane foam is immersed in the lubricant bath.
Then, the predetermined shaft member 1 is inserted into the through hole of the bearing 2a, and the shaft member 1 and the bearing 2a are arranged so that the shaft member 1 is in sliding contact with the lubricant holding member 25a. In addition, after arrange | positioning the shaft member 1 and the bearing 2a in sliding contact like FIG. 1A, a lubricant is infiltrated into the lubricant holding member 25a by injecting the lubricant from the oil hole 23a. In this way, the lubricant can be supplied into the lubricant holding space 22a.

Thus, even in the bearing 2a having a plurality of independent (three in Embodiment 2) lubricant holding spaces 22a, urethane foam is injected into each lubricant holding space 22a from each oil hole 23a. By solidifying, the lubricant holding member 25a can be easily formed on the sliding contact surface between the bearing 2a and the shaft member 1.
Since the lubricant holding member 25a is made of foamed urethane, which is a porous resin material that can be impregnated with the lubricant, the lubricant holding member 25a can be suitably attached to the shaft member 1 while suitably holding the lubricant. By applying a lubricant to the sliding contact surface between the bearings 2a, the sliding contact surface can be suitably lubricated.

(Embodiment 3)
Next, Embodiment 3 of the lubricant holding member and the lubricant holding member forming method according to the present invention will be described. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, and only a different part is demonstrated.

FIG. 3 shows a bearing 20 as a predetermined sliding contact member and a predetermined shaft member 1a supported by the bearing 20 so as to be slidable.
3A is a sectional side view showing the shaft member 1a supported by the bearing 20, FIG. 3B is a sectional view taken along the line bb of FIG. 1A, and FIG. FIG.

  As shown in FIGS. 3A to 3C, the shaft member 1 a is filled with the lubricant holding space 11 formed on the sliding contact surface of the shaft member 1 a with the bearing 20 and the lubricant holding space 11. And a lubricant holding member 15.

  The bearing 20 is fixed to a machine frame of the device in order to support the shaft member 1a at a predetermined position of the predetermined device.

  The shaft member 1a is a drive shaft that advances and retreats in the axial direction and rotates / rotates about its axis in order to cause a drive mechanism or the like in a predetermined device to perform a predetermined operation.

  The lubricant holding space 11 is a space formed as a recess that is one step lower than the peripheral surface of the shaft member 1a.

  The lubricant holding member 15 is made of, for example, a porous resin material that can be held by impregnating a lubricant such as lubricating oil or grease, which is formed by mixing countless bubbles in polyurethane, polyolefin, or the like. Urethane foam made of polyurethane, foam rubber or the like can be used. The lubricant holding member 15 is a member made of a porous resin material similar to the lubricant holding member 25 in the first embodiment.

  And the shaft member 1a can lubricate the sliding contact surface between the bearing 20 which contacts the peripheral surface of the shaft member 1a by providing the lubricant holding member 15 containing the lubricant. .

  Next, a lubricant holding member forming method in which the lubricant holding member 15 is formed and disposed in the lubricant holding space 11 will be described.

First, urethane foam, which is a resin foam having fluidity, is injected and poured into the lubricant holding space 11 formed in the shaft member 1a, and the urethane foam is filled into the lubricant holding space 11.
Next, the lubricant holding space 11 filled with urethane foam is inserted into the through hole of the temporary bearing for forming the lubricant holding member having the same shape and the same inner diameter as the predetermined bearing 20. Cover with the temporary bearing.
When a predetermined time elapses, the urethane foam is solidified, and the lubricant holding member 15 made of porous foamed urethane is formed in the lubricant holding space 11.

Then, after the lubricant holding member 15 made of urethane foam is formed in the lubricant holding space 11, the temporary bearing is removed, and the foamed urethane portion leaked from the lubricant holding space 11 is scraped off to form the shape of the lubricant holding member 15. To arrange.
Next, the lubricant holding member 15 is impregnated with the lubricant such that the shaft member 1a including the lubricant holding member 15 made of urethane foam is immersed in the lubricant bath.
Then, the shaft member 1 a including the lubricant holding member 15 is inserted into the through-hole of the predetermined bearing 20, and the shaft member 1 a and the bearing 20 are arranged so that the bearing 20 is in sliding contact with the lubricant holding member 15.

Thus, the lubricant holding member 15 provided in the shaft member 1a can be easily formed by injecting a solid urethane foam into the lubricant holding space 11 of the shaft member 1a and solidifying it. Therefore, it is easy to arrange on the sliding contact surface between the shaft member 1a and the bearing 20.
Further, since the lubricant holding member 15 can be formed in accordance with the size and shape of the lubricant holding space 11, there is no problem that the lubricant holding member 15 falls out of the lubricant holding space 11 and comes off.
Since the lubricant holding member 15 is made of urethane foam, which is a porous resin material that can be impregnated with the lubricant, the lubricant holding member 15 is suitably applied to the sliding contact surface while suitably holding the lubricant. Thus, the sliding contact surface can be suitably lubricated.

(Embodiment 4)
Next, Embodiment 4 of the lubricant holding member and the lubricant holding member forming method according to the present invention will be described. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1 and Embodiment 3, and only a different part is demonstrated.

FIG. 4 shows a bearing 20 as a predetermined sliding contact member and a predetermined shaft member 1a supported by the bearing 20 so as to be slidable.
In addition, the shaft member 1a in the fourth embodiment is a drive shaft that rotates and rotates around its axis.

  As shown in FIGS. 4A to 4C, the shaft member 1 a is disposed in the lubricant holding space 11 formed on the sliding contact surface of the shaft member 1 a with the bearing 20, and the lubricant holding space 11. And a lubricant holding member 15a.

  The lubricant holding member 15 a is formed to have a thickness that covers the peripheral surface of the shaft member 1 a and is separated from the inner surface of the bearing 20 in the lubricant holding space 11.

  The shaft member 1a includes a lubricant holding member 15a containing a lubricant, and rotates around the shaft center so that the lubricant contained in the lubricant holding member 15a is caused by centrifugal force accompanying the rotation. Since it will be scattered or flowed to the outside, it is possible to lubricate the slidable contact surface between the bearing 20 and the peripheral surface of the shaft member 1a.

  Thus, even when the lubricant holding member 15a included in the shaft member 1a is not in contact with the inner surface of the bearing 20, the shaft member 1a is a drive shaft that rotates and rotates around its axis. For example, the lubricant contained in the lubricant holding member 15 a can be lubricated on the sliding contact surface with the bearing 20 slidably contacting the peripheral surface of the shaft member 1 a by scattering the lubricant to the outside by centrifugal force.

(Embodiment 5)
Next, Embodiment 5 of the lubricant holding member and the lubricant holding member forming method according to the present invention will be described. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, Embodiment 3, Embodiment 4, and only a different part is demonstrated.

FIG. 5 shows a bearing 20 as a predetermined sliding contact member and a predetermined shaft member 1b supported by the bearing 20 so as to be slidable.
In addition, the shaft member 1b in the fifth embodiment is a drive shaft that rotates and rotates around its axis.

  As shown in FIGS. 5A to 5C, the shaft member 1b is a lubricant holding space 11 formed on the sliding contact surface of the shaft member 1b with the bearing 20 and the shaft center side of the shaft member 1b. A lubricant supply hole 13 that is a lubricant flow path formed inside, an oil hole 12 that is a lubricant flow path that passes through the lubricant holding space 11 and the lubricant supply hole 13, and a lubricant holding space 11. A provided lubricant holding member 15 a and a lubricant supply member 16 filled in the oil hole 12 are provided.

  The shaft member 1b is a drive shaft that advances and retreats in the axial direction, and rotates and rotates around the axis in order to cause a drive mechanism or the like in a predetermined device to perform a predetermined operation.

The lubricant holding space 11 is a space formed as a recess that is one step lower than the peripheral surface of the shaft member 1a.
The lubricant supply hole 13 is a flow path for supplying the lubricant stored in a lubricant storage tank (not shown) to the lubricant holding space 11 by a pump (not shown).
The oil hole 12 is a through hole formed to supply the lubricant in the lubricant supply hole 13 to the lubricant holding space 11.

The lubricant holding member 15a is made of, for example, a porous resin material that can be impregnated with a lubricant formed by mixing countless bubbles in polyurethane, polyolefin, or the like. For example, urethane foam or foam rubber made of polyurethane Etc. can be used.
The lubricant holding member 15 a is formed in a thickness that separates from the inner surface of the bearing 20 while covering the peripheral surface of the shaft member 1 b in the lubricant holding space 11.
The oil hole 12 is provided with a lubricant supply member 16 formed integrally with the lubricant holding member 15a.
The lubricant supply member 16 absorbs the lubricant supplied into the lubricant supply hole 13 and utilizes the principle of capillary action so that the lubricant is soaked into the lubricant holding member 15a. A lubricant is supplied to the agent holding member 15a.
The lubricant supply member 16 is made of the same porous resin material as the lubricant holding member 15a.
That is, by injecting urethane foam into the lubricant holding space 11 and the oil hole 12 and solidifying it, the lubricant holding member 15a and the lubricant supply member 16 can be integrally formed.

The shaft member 1b is provided with a lubricant holding member 15a containing a lubricant, and by rotating around its axis, the lubricant contained in the lubricant holding member 15a is caused by centrifugal force accompanying the rotation. Since it is scattered outside or flows out, it is possible to lubricate the slidable contact surface with the bearing 20 slidably contacted with the peripheral surface of the shaft member 1b.
In particular, since the lubricant supplied into the lubricant supply hole 13 is supplied to the lubricant holding member 15a via the lubricant supply member 16, it is always between the shaft member 1b and the bearing 20. The sliding contact surface can be lubricated.

In this manner, the lubricant is supplied into the lubricant supply hole 13 of the shaft member 1b, so that the lubricant holding member 15a can always hold the lubricant.
Then, when the shaft member 1b rotates / rotates around its axis, the lubricant contained in the lubricant holding member 15a is slid on the outer surface of the shaft member 1b by centrifugal force. The slidable contact surface between the bearing 20 in contact with the bearing 20 can be lubricated.

(Embodiment 6)
Next, Embodiment 6 of the lubricant holding member and the lubricant holding member forming method according to the present invention will be described. In addition, the same code | symbol is attached | subjected to Embodiment 1 and Embodiment 3 and the same part, and only a different part is demonstrated.

FIG. 6 shows a bearing 20 as a predetermined sliding contact member and a predetermined shaft member 1b supported by the bearing 20 so as to be slidable.
In addition, the shaft member 1b in the sixth embodiment is a drive shaft that rotates and rotates around its axis.

  As shown in FIGS. 6A to 6C, the shaft member 1b is the lubricant holding space 11 formed on the sliding contact surface of the shaft member 1b with the bearing 20, and the shaft center side of the shaft member 1b. A lubricant supply hole 13 that is a lubricant flow path formed inside, an oil hole 12 that is a lubricant flow path passing through the lubricant holding space 11 and the lubricant supply hole 13, and a lubricant holding space 11. A lubricant holding member 15 b provided, a lubricant supply member 16 filled in the oil hole 12, and a lubricant supply member 17 filled on the tip side of the lubricant supply hole 13 are provided.

The lubricant supply member 16 and the lubricant supply member 17 are made of, for example, a porous resin material that can be impregnated with a lubricant and formed by mixing countless bubbles in polyurethane, polyolefin, or the like. A foamed urethane, foam rubber or the like can be used.
The lubricant supply member 16 and the lubricant supply member 17 can be integrally formed by injecting urethane foam into the oil holes 12 and the lubricant supply holes 13 and solidifying them.
In the lubricant holding space 11, a lubricant holding member 15 b is formed on a part of the surface where the lubricant supply member 16 is exposed from the oil hole 12.
That is, since the lubricant holding member 15b, the lubricant supply member 16, and the lubricant supply member 17 are integrally formed of foamed urethane, the lubricant supplied into the lubricant supply hole 13 is subjected to capillary action. In principle, the lubricant is supplied to the lubricant holding member 15b through the lubricant supply member 17 and the lubricant supply member 16 at an appropriate supply amount and supply speed.

The shaft member 1b is provided with a lubricant holding member 15b containing a lubricant, and by rotating around its axis, the lubricant contained in the lubricant holding member 15b is caused by the centrifugal force accompanying the rotation. Since it is scattered outside or flows out, it is possible to lubricate the slidable contact surface with the bearing 20 slidably contacted with the peripheral surface of the shaft member 1b.
Particularly, since the lubricant supplied into the lubricant supply hole 13 is supplied to the lubricant holding member 15b via the lubricant supply member 17 and the lubricant supply member 16, the shaft member 1b is always provided. And the sliding contact surface between the bearing 20 can be lubricated.

  In the above embodiment, the predetermined shaft members 1, 1a, 1b have been described as cylindrical shaft members. However, the present invention is not limited to this, and the shaft member may be, for example, a rail shape. The shape of the lubricant holding member disposed on the sliding contact surface between the shaft member and the sliding contact member may be an arbitrary shape according to the shape of the sliding contact surface. It's okay.

  Moreover, in the above embodiment, although demonstrated as a sliding contact member as a bearing which supports a shaft member so that sliding is possible, this invention is not limited to this, For example, a sliding contact member is a shaft. It may be a member that slides and moves along the axial direction of the member.

  Further, in the above embodiment, when forming the lubricant holding member, the lubricant using the temporary shaft or temporary bearing for forming the lubricant holding member as a mold for forming the lubricant holding member into a predetermined shape. Although the holding member forming method has been described, the present invention is not limited to this, and urethane foam is injected into a lubricant holding space formed by a shaft member and a bearing that are actually used. Alternatively, a lubricant holding member made of a porous resin material may be formed.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the pin provided with the lubricant holding member which concerns on this invention, the side view (a) which shows a pin, sectional drawing (b) in the bb line of FIG. It is a partial cross section side view (c) which shows a pin. In Embodiment 2 of this invention, it is explanatory drawing which shows the state in which a bearing provided with a lubricant holding member supports a shaft member, and is a partial cross-sectional side view (a) of the bearing and b- in FIG. It is sectional drawing (b) in b line. It is explanatory drawing which shows the state by which the shaft member provided with the lubricant holding member in Embodiment 3 of this invention is supported by a bearing, and is a cross-sectional side view (a) which shows the shaft member supported by a bearing, Fig.3 (a) It is sectional drawing (b) in the bb line | wire, and is a side view (c) which shows a shaft member by seeing a cross section of a bearing. It is explanatory drawing which shows the state by which the shaft member provided with the lubricant holding member in Embodiment 4 of this invention is supported by a bearing, and is sectional side view (a) which shows the shaft member supported by a bearing, Fig.4 (a) It is sectional drawing (b) in the bb line | wire, and is a side view (c) which shows a shaft member by seeing a cross section of a bearing. It is explanatory drawing which shows the state by which the shaft member provided with the lubricant holding member in Embodiment 5 of this invention is supported by a bearing, and is a cross-sectional side view (a) which shows the shaft member supported by a bearing, Fig.5 (a) It is sectional drawing (b) in the bb line | wire, and is a side view (c) which shows a shaft member by seeing a cross section of a bearing. It is explanatory drawing which shows the state by which the shaft member provided with the lubricant holding member in Embodiment 6 of this invention is supported by a bearing, and is sectional side view (a) which shows the shaft member supported by a bearing, Fig.6 (a) It is sectional drawing (b) in the bb line | wire, and is a side view (c) which shows a shaft member by seeing a cross section of a bearing. It is explanatory drawing which shows the state with which the conventional pin is provided with the lubricant holding member, and is sectional drawing (b) in the bb line of Fig.7 (a) and the side view (a) which shows a pin. It is explanatory drawing which shows the state which encloses grease in internal space in the conventional pin with a metal plug, and is sectional drawing (b) in the bb line of FIG. It is sectional drawing (c) in the cc line of (a).

Explanation of symbols

1 shaft member 2 pin (shaft member)
21 Pin body 22 Lubricant holding space 23 Oil hole (lubricant flow path)
25 Lubricant holding member 26 Lubricant supply member 2a Bearing (sliding contact member)
21a Bearing body 22a Lubricant holding space 23a Oil hole (lubricant flow path)
25a Lubricant holding member 1a, 1b Shaft member 11 Lubricant holding space 12 Oil hole (lubricant flow path)
13 Lubricant supply hole (lubricant flow path)
15, 15a, 15b Lubricant holding member 16 Lubricant supply member 17 Lubricant supply member 20 Bearing (sliding contact member)

Claims (10)

A lubricant holding member provided in a lubricant holding space in which a lubricant to be supplied to a surface in contact with a predetermined sliding contact member is stored,
The lubricant holding member is made of a porous resin material that can be impregnated with a lubricant, which is formed by injecting a resin foam into the lubricant holding space.   The lubricant holding member is provided in a lubricant holding space formed inside the shaft member so as to communicate with the peripheral surface of a shaft member that pivotally supports a predetermined sliding contact member on the peripheral surface thereof. The lubricant holding member according to claim 1, wherein the lubricant holding member is formed.   2. The lubrication according to claim 1, wherein the lubricant holding member is provided in a lubricant holding space formed on a surface side in sliding contact with the shaft member in a sliding contact member in sliding contact with a predetermined shaft member. Agent holding member.   2. The lubrication according to claim 1, wherein the lubricant holding member is provided in a lubricant holding space formed on a surface side in sliding contact with the sliding contact member of a shaft member that is in sliding contact with a predetermined sliding contact member. Agent holding member.   The lubricant holding member includes a lubricant supply member formed integrally with the lubricant holding member by a porous resin material in which the resin foam is injected into a lubricant flow path communicating with the lubricant holding space. The lubricant holding member according to any one of claims 1 to 4, wherein the lubricant holding member is provided.   The lubricant holding member according to any one of claims 1 to 5, wherein the porous resin material is urethane foam.   Lubricant holding made of urethane foam capable of impregnating lubricant into the lubricant holding space by injecting urethane foam into the lubricant holding space for storing the lubricant to be supplied to the surface in contact with the predetermined sliding contact member A lubricant holding member forming method comprising forming a member.   The lubricant holding space is a lubricant holding space formed inside the shaft member so as to communicate with the peripheral surface of the shaft member that pivotally supports a predetermined sliding contact member on the peripheral surface thereof. The method for forming a lubricant holding member according to claim 7.   8. The lubricant according to claim 7, wherein the lubricant holding space is a lubricant holding space formed on a surface side in sliding contact with the shaft member in a sliding contact member in sliding contact with a predetermined shaft member. Holding member forming method.   The lubrication holding space according to claim 7, wherein the lubricant holding space is a lubricant holding space formed on a surface side in sliding contact with the sliding contact member in a shaft member sliding in contact with a predetermined sliding contact member. Agent holding member forming method.

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