JPH0571540A - Slide bearing - Google Patents

Abstract

PURPOSE:To provide a slide bearing which is hardly worn out because of the low frictional coefficient, hardly generates oil exhaustion, hardly generates crack and cut on a synthetic resin part, maintains high dimension precision for the temperature variation, and possesses superior mass production performance. CONSTITUTION:A sintered metal layer 1 which is in porous state and impregnated with lubricating oil and a synthetic resin sheet layer 2 are attached by a film shaped adhesive 3 which possesses dry touch performance, and a part of the sintered metal layer 2 is exposed from a cut part 4 formed on the synthetic resin sheet layer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide bearing including a sintered metal layer and a synthetic resin sheet layer.

[0002]

2. Description of the Related Art As conventional sliding bearings, sintered metal oil-impregnated sliding bearings and synthetic resin sliding bearings are known. The former is a plain bearing formed by impregnating lubricating oil into a sintered metal body which is a porous metal body, and uses the impregnated lubricating oil as a lubricant.

The latter is a plain bearing made of an unfilled resin, a filled resin containing various fillers for improving friction resistance and wear resistance.

[0004]

However, the sintered metal oil-impregnated plain bearing has the following problems. Under heavy load or low-speed sliding conditions, rocking, and intermittent operation, the lubricating oil does not seep out sufficiently and the oil runs out, resulting in a high friction coefficient and easy wear. When the ambient temperature rises, the impregnated oil leaks vigorously from the entire surface of the sintered metal body, causing oil to run out early, resulting in a marked deterioration in the characteristics of the sliding bearing and damage to the mating shaft.

On the other hand, the synthetic resin sliding bearing has the following problems. Since it is used in a dry state, it has a high friction coefficient and is easily worn. It has low strength and is easily cracked or chipped. Since the linear expansion coefficient of the resin is large, the dimensional change due to the temperature change is large, and the gap between the resin and the shaft becomes large depending on the temperature condition, which easily causes rattling.

Therefore, the present invention has been made by paying attention to the above-mentioned conventional problems. It has a low friction coefficient, is less likely to be worn, is less likely to run out of oil, is less likely to be cracked or chipped in a synthetic resin, and has a higher temperature. It is an object of the present invention to provide a plain bearing which has high dimensional accuracy against changes and is excellent in mass productivity.

[0007]

In order to achieve the above object, the sliding bearing of the present invention is a film in which a porous sintered metal layer impregnated with lubricating oil and a synthetic resin sheet layer have a dry touch property. Part of the sintered metal layer is exposed by the notch provided in the synthetic resin sheet layer, which is adhered by a linear adhesive.

The sliding bearing of the present invention is a film-like adhesive having a dry-touch property in which a porous sintered metal layer impregnated with lubricating oil and a porous synthetic resin sheet layer impregnated with lubricating oil are dry-touchable. Part of the sintered metal layer is opposed to the porous synthetic resin sheet layer without an adhesive agent.

[0009]

The sliding bearing of the present invention has a two-layer structure of a sintered metal layer impregnated with lubricating oil and a synthetic resin sheet layer having a notch, and the lubricating oil of the sintered metal layer passes through the notch. Since the sliding surface of the synthetic resin sheet layer is replenished in an appropriate amount over a long period of time, the friction coefficient is kept low and wear is small.

Since the synthetic resin sheet layer adhered to the sintered metal layer prevents abrupt leak of the lubricating oil, the oil does not run out early even if the ambient temperature rises. As the synthetic resin sheet layer, a thin sheet can be used to prevent cracking or chipping. Further, since a resin sheet having a uniform thickness can be adhered with a film adhesive having a uniform thickness, it is possible to ensure dimensional accuracy and to linearly expand the synthetic resin sheet layer in the radial direction. Is suppressed by the sintered metal layer, and the influence of temperature change can be suppressed to a small level.

Further, since a synthetic resin sheet is used, there are few restrictions on usable resins, and for example, PTFE (polytetrafluoroethylene) resin and thermosetting resin which cannot be injection-molded can be used. Thermoplastic adhesive as an adhesive,
Film-shaped hot-melt adhesives, rubber adhesives, thermosetting adhesives, etc. can be used depending on the application.

When the synthetic resin sheet layer is a porous synthetic resin sheet, the lubricating oil can be exuded and lubricated from the entire surface of the sheet without providing a notch. In addition, the impregnated lubricating oil in the sintered metal layer is better retained than when the sheet is provided with the cutout portion even when the atmospheric temperature rises. 1 to 4, the resin sheet can be easily cut and cut after the film-like adhesive is pressure-bonded to the large synthetic resin sheet. In addition, the slide bearings of FIGS. 5 to 8 can be easily cut after the notched film adhesive is pressure-bonded to the porous large synthetic resin sheet. Therefore, the adhesive-coated synthetic resin sheet having a required size can be easily manufactured at low cost.

Dry touch property (after applying an adhesive,
Since the adhesive layer, which has the property of being bonded after the adhesive has become non-sticky, is non-sticky, the sheet can be smoothly inserted into the outer cylinder. Moreover, the adhesive does not adhere to unnecessary places. Productivity is good because bonding can be done in a few seconds by thermocompression bonding.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference symbols and redundant description will be omitted. FIG. 1 shows the first of the present invention.
3 is a vertical cross-sectional view of the embodiment of FIG. In the figure, 1 is a porous sintered metal layer, and 2 is a synthetic resin sheet layer bonded to the inner surface 1a of the sintered metal layer 1 via a film adhesive 3. The synthetic resin sheet layer 2 is provided with a large number of circular notches 4 arranged in the circumferential direction and the axial direction, and a part of the inner surface 1a of the sintered metal layer 1 is synthesized through the notches 4. Inner surface of the resin sheet layer 2, that is, sliding surface 2 with the rotating shaft 5.
It is exposed on the a side.

The sintered metal layer 1 is formed of powder of metal such as iron, copper, aluminum or the like in a cylindrical shape by powder metallurgy, and lubricating oil is impregnated in the fine pores of the porous structure. However, the outer shape is not limited to the cylindrical shape, and may be a quadrangular shape or the like. The synthetic resin sheet layer 2 includes, for example, thermoplastic resins such as POM (polyacetal), PPS (polyphenylene sulfide), PES (polyether sulfone), PE (polyethylene), PA (polyamide), PTFE (polytetrafluoroethylene), Alternatively, a material such as PI (polyimide) which is a thermosetting resin can be used. Also, a composite material obtained by mixing various fillers with these synthetic resin materials can be used.

As the film adhesive 3, an adhesive having a dry touch property such as a thermoplastic resin adhesive, a rubber adhesive, a thermosetting adhesive, a hot melt adhesive or the like can be used. It is also possible to use an adhesive having a dry touch property obtained by modifying the base resin of the adhesive. Next, the operation will be described.

The lubricating oil impregnated in the sintered metal layer 1 exudes from the inner surface 1a exposed in the cutout portion 4 of the synthetic resin sheet layer 2 and is supplied to the sliding surface 2a through the cutout portion 4. It That is, although the sliding portion of the bearing is a sliding bearing made of synthetic resin, it is not in a dry state but is lubricated. Therefore, it has low wear resistance, and it is possible to secure low friction and low wear even under conditions of high load or low speed slip, or during rocking operation or intermittent operation.

Only a part of the inner surface 1a of the sintered metal layer 1 is exposed through the notch 4 in the synthetic resin sheet layer 2, and most of the inner surface is covered with the adhesive 3 through the synthetic resin sheet. Since it is covered with the layer 2, the lubricating oil cannot exude from the portion other than the cutout portion 4 to the sliding surface 2a. Therefore, even if the ambient temperature rises, oil will not run out rapidly as in the case of the conventional sintered metal oil impregnated plain bearing. The synthetic resin sheet layer 2 may be a porous synthetic resin sheet impregnated with lubricating oil.

Since the synthetic resin sheet layer 2 has a small thickness, there is no risk of cracking or chipping, and the creep can be suppressed even under a high load. Further, since the synthetic resin sheet layer 2 is adhered by the film adhesive 3, it can be formed by adhering to the highly accurate sintered metal cylindrical body by the film adhesive 3 having a uniform thickness.
Therefore, high dimensional accuracy can be realized, and the shaft 5
It can be used as a precision bearing because the radial clearance between and can be reduced.

As described above, the synthetic resin sheet layer 2 is firmly adhered to the sintered metal layer 1 to integrate the two layers, and the sintered metal layer 1 having a small linear expansion coefficient makes the synthetic resin having a large linear expansion coefficient. The expansion of the seat layer 2 is suppressed. Therefore, the coefficient of linear expansion of the inner surface 2a of the synthetic resin sheet layer 2 is almost equal to or less than that of the sintered metal layer 1 (depending on the coefficient of linear expansion and the thickness of the bonded synthetic resin sheet layer 2). As a result, the influence of temperature change on the dimensional accuracy is suppressed, and stable accuracy is obtained.

FIG. 2 is a vertical sectional view of the second embodiment. This is different from the first embodiment in that the notch 4 provided in the synthetic resin sheet layer 2 has a rectangular shape instead of a circular shape. FIG. 3 is a vertical sectional view of the third embodiment. The sliding bearing of this embodiment is a linear sliding bearing in which a shaft 5 reciprocates linearly in the axial direction, and a synthetic resin sheet layer 2 is used.
Is provided with a herringbone-shaped dynamic pressure generating groove 6 for forward and reverse linear motions on the sliding surface 2a. The groove 6 includes a groove 6A in which the arrow tip direction is in the axial right direction and a groove 6 in the axial left direction.
B and B are connected in a wave shape in the direction perpendicular to the axis and arranged in the axial direction at substantially the same intervals.

When the shaft 5 linearly moves in the right direction in the figure, the axially rightward groove 6 whose arrowhead coincides with the moving direction.
Due to the pumping action of A, a dynamic pressure is generated in the lubricating oil flowing out to the bearing sliding surface 2a, and the shaft 5 is supported. When the shaft 5 linearly moves in the opposite direction, dynamic pressure is also generated in the lubricating oil by the pumping action of the groove 6B whose arrowhead direction is axially leftward to support the shaft 5. Therefore, there is an advantage that the wear resistance is improved over those of the first and second embodiments. Further, the pumping action of the groove 6 for generating the dynamic pressure also increases the retaining force of the lubricating oil on the sliding surface 2a, and as a result, the leakage of the lubricating oil to the outside of the bearing is reduced and the durability of the bearing is improved. is there.

Other functions and effects are similar to those of the first and second embodiments. The shape of the groove 6 for generating dynamic pressure is not limited to the herringbone shape described above, but may be formed by appropriately arranging a C-shape, a rhombus shape, or the like. Also,
It is also possible to fix the shaft 5 and use the sliding bearing by reciprocating linear movement. In addition, the notch 4 of the synthetic resin sheet layer 2
May be in the groove 6 for generating dynamic pressure or in the land portion 7. The shape of the cutout portion 4 is not limited to a circle or a rectangle, and may be any shape. The point is that the lubricating oil with which the sintered metal layer 1 is impregnated can be exuded to the sliding surface 2a of the synthetic resin sheet layer 2 through the notch 4.

FIG. 4 is a vertical sectional view of the fourth embodiment. The slide bearing of this embodiment is a radial slide bearing in which a shaft 5 reciprocally rotates, and a sliding surface 2a of a synthetic resin sheet layer 2 is provided with a groove 8 for generating a dynamic pressure for forward / reverse rotary motion. It is provided. This groove 8 is a groove 8A whose arrow direction is downward.
And the upward groove 8B connected in a corrugated manner in the axial direction and alternately arranged, are arranged at substantially the same interval in the circumferential direction via the land portion 9 in the third embodiment. It differs from the example. In this case, the pumping action of the groove 8 for generating dynamic pressure generated by the rotational movement of the shaft 5 generates dynamic pressure in the lubricating oil that has flowed out to the bearing sliding surface 2a and supports the shaft 5.

FIG. 5 is a vertical sectional view of the fifth embodiment. The sliding bearing of this embodiment is characterized in that the porous synthetic resin sheet layer 10 is used as the synthetic resin sheet layer in the above first to fourth aspects.
Is different from each embodiment. That is, the porous sintered metal layer 1 and the porous synthetic resin sheet layer 10 are adhered by the film adhesive 3. In the three layers of the film adhesive of this embodiment, a plurality of diagonally-shaped "adhesive-free portions 11" having a slight width are provided in parallel at substantially equal intervals. A part 1a of the inner peripheral surface of the sintered metal layer 1 directly faces a part of the outer peripheral surface of the porous synthetic resin sheet layer 10 through the "adhesive-free portion 11". The sintered metal layer 1 and the porous synthetic resin sheet layer 10 are impregnated with lubricating oil in advance before using the bearing. The lubricating oil exuded from the sintered metal layer 1 passes through the “adhesive-free portion 11” of the film-like adhesive 3 layer and the porous synthetic resin sheet layer 10
Is supplied to the entire surface of the sliding surface 10a, which is the inner diameter surface, after passing through a large number of fine holes in the porous synthetic resin sheet layer 10. Therefore, in the porous synthetic resin sheet layer 10 of this embodiment, the notch 4 which is the lubricating oil seeping passage is provided.
Need not be provided.

The use of such a porous synthetic resin sheet layer 10 has the effect of enhancing the function of suppressing unnecessary leakage of lubricating oil from the sintered metal layer 1 due to an increase in ambient temperature. Further, since the lubricating oil has exuded to the entire sliding surface of the porous synthetic resin sheet layer 10 from the beginning, the oil film is stably formed between the shaft 5 and the bearing sliding surface 10a from the initial stage of operation. This makes it possible to exhibit stable high performance from the initial stage of operation.

FIG. 6 is a vertical sectional view of the sixth embodiment. In this example, the "adhesive-free portion 11" of the three layers of the film-like adhesive for adhering the porous synthetic resin sheet layer 10 was formed into a circular shape, and a plurality of them were arranged at substantially equal intervals in the axial direction and the circumferential direction. It is a thing. The operation and effect are similar to those of the fifth embodiment. The shape of the "adhesive-free portion 11" of the three layers of the film adhesive is not limited to the above fifth and sixth embodiments, and may be any shape.

FIG. 7 is a vertical sectional view of the seventh embodiment. In this embodiment, the sliding surface 10 of the porous synthetic resin sheet layer 10 is used.
A herringbone-shaped groove 6 for generating a dynamic pressure is provided in a. "Adhesive-free portion 11" provided in three layers of the film adhesive instead of the notch portion 4
Are provided as parallel grooves having a narrow width in the axial direction in parallel at substantially equal intervals.

FIG. 8 is a vertical cross-sectional view of the eighth embodiment, in which a sliding surface 10a of the porous synthetic resin sheet layer 10 is provided with a groove 12 for generating a dynamic pressure for one-way rotational movement. .. The direction of the arrow tip of the groove 12 is directed downward in accordance with the rotation direction of the shaft 5. The “adhesive-free portion 11” provided in the three layers of the film-like adhesive has a circular shape, and a plurality of them are arranged at intervals along the land portion 13.

In addition to the effects of the first embodiment, the seventh and eighth embodiments have the advantages of the porous synthetic resin sheet layer and the advantages of the grooved slide bearing for generating dynamic pressure. .. That is, since the porous synthetic resin sheet layer 10 is provided, the function of suppressing unnecessary leakage of the lubricating oil from the sintered metal layer 1 due to the increase in ambient temperature is enhanced. Further, since the lubricating oil has exuded to the entire sliding surface of the porous synthetic resin sheet layer 10 from the beginning, the shaft 5 and the bearing sliding surface 1 are in contact with each other from the beginning of operation.
The formation of an oil film with the oil layer 0a is stably performed, and stable high performance can be exhibited from the initial stage of operation.

Further, the pumping action of the dynamic pressure generating grooves 6 and 12 generates dynamic pressure in the lubricating oil to support the shaft 5, so that there is an advantage that wear resistance is improved. In addition, the pumping action of the dynamic pressure generating grooves 6 and 12 increases the retaining force of the lubricating oil, and the leakage of the lubricating oil to the outside of the bearing is reduced to improve the durability of the bearing. Hereinafter, a method of manufacturing the slide bearings (using a notched synthetic resin sheet) shown in the first to fourth embodiments of the present invention will be described with reference to FIGS. 9 to 12.

First, one side of a large-sized synthetic resin sheet 22, which is composed mainly of PTFE and is mixed with a wear property improving substance such as carbon fiber or glass fiber, is subjected to defluorination as a pretreatment for adhesion. .. After that, as shown in FIG. 9, the film adhesive 3 applied to the release paper 23.
(For example, a heat-reactive film adhesive mainly composed of epoxy modified resin having excellent adhesive strength, heat resistance, solvent resistance, oil resistance, etc.) and a large synthetic resin sheet 22 were defluorinated. The pressure roller 4 which is heated so as to face the surface.
The film adhesive 3 is pressure-bonded to one surface of the large-sized synthetic resin sheet 22 by 0, 41. For example, in the case of the above heat-reactive film adhesive, heated pressure rollers 40, 41
Pressure is 1-10Kg, adhesive temperature is 10-200 ℃
Is.

Next, as shown in FIG. 10, a plurality of sheets 2 having a required size are cut out from the large synthetic resin sheet 22 and punched out to form a cutout portion 4. At this time, since the film-like adhesive 3 pressure-bonded to the large-sized synthetic resin sheet 22 has a dry touch property and is in a non-sticky state, the notch and cutting operations are easy. As a method of inserting the cutting and notch portion 4, the release paper 23 may be attached or removed. Large synthetic resin sheet 22 and film adhesive 3 with release paper 23 attached
Only the notch or the cut may be performed (this method does not cause the cut sheet 2 to fall apart). Also,
The release paper 23, the large synthetic resin sheet 22 and the film adhesive 3 may be cut out or cut.

FIG. 11 shows a cutaway view of the large-sized synthetic resin sheet 22 with a dynamic pressure groove. Large synthetic resin sheet with dynamic pressure groove 2
As the manufacturing method of 2, the groove 6 for generating dynamic pressure was formed on the large-sized synthetic resin sheet 22 by using the heating and pressing roller of the rolling machine before the pressure bonding of the adhesive. The other steps are the same as above. Next, the cut sheet 2 is cut, the cutout portion 4 is inserted, and the sheet 2 from which the release paper 23 has been peeled off is rolled with the adhesive surface facing outward and inserted into the inner peripheral surface of the porous sintered metal layer 1. At this time, the adhesive is in a non-sticky state due to its dry touch property, so that the sheet 2 can be easily inserted. Further, since the adhesive does not adhere to the inner diameter surface of the sintered metal layer 1 that faces the cutout portion 4 of the sheet 2, a surface through which the lubricating oil exudes is secured.

Next, as shown in FIG. 12, the sintered metal layer 1 is rotated by the heated pressure rollers 40 and 41 to perform thermocompression bonding with the sheet 2. In the case of a heat-reactive film adhesive, the applied pressure is 1 to 10 kg and the adhesive temperature is 50 to 20.
The rotation speed was about 0 ° C. and the rotation speed was 1 to 2 rotations / several seconds. Thus, the synthetic resin sheet 2 having a uniform thickness is adhered to the sintered metal layer 1 having good dimensional accuracy with the film adhesive 3 which is thin and uniform and has a solid content of 100%. Dimensional accuracy can be obtained.

Incidentally, the adhesion is not limited to the above method. The heated rod may be lightly pressed into the inner diameter surface of the synthetic resin sheet 2. The point is that it can be thermocompression bonded. Next, the adhered materials are collectively heated in a heating furnace to further cure the adhesive. At this time, the bonded synthetic resin sheet 2 does not move, and the accuracy at the time of bonding is maintained as it is.

Finally, collectively, the sintered metal layer 1 is impregnated with lubricating oil. When a hot-melt type adhesive is used as the adhesive, the above heat curing action is unnecessary. The method of manufacturing the sliding bearings (using a porous synthetic resin sheet having no notch) shown in the fifth to eighth embodiments of the present invention is as follows.

First, the "adhesive-free portion 11" having a required size is formed on the large-sized film adhesive 3 having a dry touch property applied to the release paper 23. This is done by cutting out the large film adhesive 3. The shape of this “portion 11 without adhesive” is not particularly limited. Also,
In the notch work, both the release paper and the film adhesive may be cut out, or only the film adhesive 3 may be cut out.

Next, in this way, "the part 11 without adhesive"
The large-sized film-like adhesive formed by cutting out is pressed onto one surface of the large-sized porous synthetic resin sheet. The crimping method may be the same as that shown in FIG. Next, a plurality of sheets having a required size are cut out from the porous large-sized synthetic resin sheet to which the film adhesive is pressure-bonded (at this time, the notch 4 is not inserted in the resin sheet). This cutting may be performed with the release paper attached, or may be performed after peeling the release paper. When cutting with the release paper attached, the release paper may or may not be cut.

The method for producing the grooved porous synthetic resin sheet layer 10 for dynamic pressure generation as shown in FIGS. 7 and 8 may be the same as the method described above, and before the film adhesive is pressure-bonded. In addition, a groove for generating dynamic pressure may be formed on the porous synthetic resin sheet by a rolling machine with a heating and pressing roller. Further, similarly to the above, the porous resin sheet that has undergone the cutting process and the release paper peeling process is inserted into the sintered metal layer and thermocompression bonded.

The above manufacturing method has the following effects. A large amount of film adhesive can be easily attached to a synthetic resin sheet with a simple device. Since the adhesive has a dry touch property, it does not become sticky.
Therefore, it is easy to cut the large-sized synthetic resin sheet to which the adhesive is pressure-bonded, and to form the "cutout portion 4" or the "adhesive-free portion 11" that is a passage for the seepage of the lubricating oil.
Can efficiently cut a large amount of small sheets. Moreover, the sheet can be easily inserted into the sintered metal layer, and the adhesive does not adhere to unnecessary portions.

The thermocompression bonding of the sheet to the sintered metal layer is easy and the work is completed in a short time. As a result, it is possible to obtain a sliding bearing having high productivity, easy mass production, and excellent dimensional accuracy at extremely high efficiency and at low cost.

[0043]

As described above, according to the present invention, the porous sintered metal layer impregnated with the lubricating oil and the synthetic resin sheet layer are bonded by a film adhesive having a dry touch property to be synthesized. Since a part of the sintered metal layer is exposed by the notch provided in the resin sheet layer, the following effects can be obtained.

Since the lubricating oil exudes to the sliding surface, the coefficient of friction is small and the friction is low. Only a part of the sintered metal layer is exposed,
Even if the ambient temperature rises, the lubricating oil does not leak from the entire surface of the sintered metal layer, sudden oil shortage can be prevented, and durability is improved. Even if the sliding surface is made of synthetic resin, it does not crack or chip because it is a thin sheet.

Since the synthetic resin sheet layer is adhered by a film adhesive, high bearing dimensional accuracy can be secured. The linear expansion of the synthetic resin sheet layer can be suppressed by the sintered metal layer, and the dimensional change due to temperature change can be reduced. In addition, the porous sintered metal layer impregnated with the lubricating oil and the porous synthetic resin sheet layer impregnated with the lubricating oil are adhered to each other by a film adhesive having a dry touch property to form one of the sintered metal layers. Since the parts are configured to face the synthetic resin sheet layer without an adhesive, the following effects can be obtained in addition to the above effects.

The function of suppressing unnecessary leakage of the lubricating oil from the sintered metal layer is improved with respect to the rise in the atmospheric temperature. A stable oil film of lubricating oil is formed on the entire sliding surface from the beginning, and stable high slip performance can be exhibited from the initial stage of operation.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a second embodiment of the present invention.

FIG. 3 is a vertical sectional view of a third embodiment of the present invention.

FIG. 4 is a vertical sectional view of a fourth embodiment of the present invention.

FIG. 5 is a vertical sectional view of a fifth embodiment of the present invention.

FIG. 6 is a vertical sectional view of a sixth embodiment of the present invention.

FIG. 7 is a vertical sectional view of a seventh embodiment of the present invention.

FIG. 8 is a vertical sectional view of an eighth embodiment of the present invention.

FIG. 9 is a schematic view of a step of pressure-bonding a film adhesive to a synthetic resin sheet in the manufacturing process of the present invention.

FIG. 10 is a plan view of a large-sized synthetic resin sheet that is cut and has a cutout portion in the manufacturing process of the present invention.

FIG. 11 is a plan view of a large-sized synthetic resin sheet in which a groove for dynamic pressure generation is formed and cut and a notch is formed in the manufacturing process of the present invention.

FIG. 12 is a schematic view of a step of thermocompression bonding a synthetic resin sheet to a sintered metal layer via a film adhesive in the manufacturing process of the present invention.

[Explanation of symbols]

 1 Sintered Metal Layer 2 Synthetic Resin Sheet Layer 3 (Film Form with Dry Touch) Adhesive 4 Cutout 10 Porous Synthetic Resin Sheet Layer 11 No Adhesive

Claims (2)

[Claims] 1. A porous sintered metal layer impregnated with lubricating oil and a synthetic resin sheet layer are bonded together by a film adhesive having a dry touch property, and sintered by a notch provided in the synthetic resin sheet layer. A plain bearing in which part of the metal layer is exposed. 2. A sintered metal layer in which a porous sintered metal layer impregnated with lubricating oil and a porous synthetic resin sheet layer impregnated with lubricating oil are bonded by a film adhesive having dry touch property. A part of the layer is a sliding bearing that faces the porous synthetic resin sheet layer without an adhesive.