JP7441773B2 - Sliding material unit and sliding bearing - Google Patents

Description

The present invention relates to a sliding material unit and a sliding bearing.

It is placed between the upper structure and lower structure of a structure as a base isolation mechanism to reduce the transmission of energy generated during an earthquake to structures such as buildings and detached houses. A sliding support that allows a lower structure to slide freely in the horizontal direction is known (for example, see Patent Document 1). The sliding bearing described in Patent Document 1 includes a smooth plate fixed to the upper side of the lower structure and a synthetic resin sliding member fixed to the lower side of the upper structure via a metal holder. The sliding material slides against the smooth plate, reducing the shaking of the upper structure during an earthquake.

Japanese Patent Application Publication No. 2003-147991

In the sliding bearing described above, the sliding member made of synthetic resin is fixed to a metal holder with an adhesive or a countersunk screw. However, depending on the material of the sliding material, some adhesives are difficult to bond or cannot be bonded. Furthermore, when countersunk screws are used, countersunk holes are formed in the sliding surface of the sliding material, so the contact area between the sliding material and the smooth plate is reduced accordingly. Therefore, in order to compensate for the decrease in the contact area, it is necessary to increase the size of the sliding material.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sliding material unit and a sliding bearing that can fix a sliding material to a holder without using adhesives or countersunk screws. do.

(1) The sliding material unit of the present invention includes a holder having a groove, a sliding material fitted into the groove, and a sliding material formed on one side of the side surface of the groove and the side surface of the sliding material, which face each other. a plurality of pins provided in the plurality of holes and movable between a protruding position where the tip portion protrudes from the one side surface and a retracted position where the tip portion is recessed into the hole portion; and the plurality of the hole portions. a plurality of spring members, each of which is provided in a free state when each of the pins is in the protruding position and returns each of the pins in the retracted position to the protruding position by an elastic restoring force; and a side surface of the groove. and on the other side of the side surfaces of the sliding material, the sliding material is fitted into the groove and is formed at a position facing each of the pins, and is located facing each of the pins. and a plurality of engagement holes with which the tip end of each pin engages, and the engagement hole is provided in the tip end of each pin when the sliding material is fitted into the groove. A tapered surface is formed that generates a force that presses each of the pins in the protruding position toward the retracted position against the elastic restoring force by coming into contact with the formed holder or the sliding member. has been done.

According to this sliding material unit, when the sliding material is fitted into the groove of the holder, the tapered surface formed at the tip of each pin in the protruding position comes into contact with the holder or the sliding material, so that each pin is recessed. A force pushing toward the position is generated. Thereby, each pin moves from the protruding position to the retracted position against the elastic restoring force of the spring member, so that the sliding member can be fitted into the groove of the holder. When the sliding material is fitted into the groove of the holder, the pins are placed facing the engagement holes, and the force that presses each pin toward the retracted position is released, so each pin in the retracted position It returns to the protruding position by the elastic restoring force of the spring member. Thereby, the tip of each pin that has returned to the protruding position is engaged with each engagement hole, so that the sliding member can be fixed to the holder without using adhesive or countersunk screws.

(2) The pin has the tip portion and a body portion connected to the tip portion, and the outer surface of the body portion is formed in a shape that allows the body portion to rotate with respect to the hole portion. Preferably, the conical tapered surface is formed on the outer surface of the tip.
In this case, even if the body of the pin in the protruding position rotates and deviates from the hole when fitting the sliding material into the groove of the holder, there is always a tapered surface at the tip of the pin. The tapered surface of the pin can be reliably brought into contact with the holder or the sliding member. This makes it possible to easily fit the sliding material into the groove of the holder.

(3) Preferably, the outer surface of the body is formed into a circular shape.
In this case, the pin can be easily manufactured.

(4) The pin has the tip and a body connected to the tip, and the inner surface of the hole and the outer surface of the body prevent the body from rotating with respect to the hole. It is preferable that each of them be formed into a shape.
In this case, since the tip of the pin does not rotate while being engaged with the engagement hole, wear of the tip of the pin can be suppressed. As a result, it is possible to suppress the tip end of the pin from being worn out and disengaging from the engagement hole.

(5) The tip of the tip is configured such that even if the sliding member attempts to move in the direction of coming out of the groove while the tip is engaged with the engagement hole, the pin moves from the protruding position to the retracted position. Preferably, a restriction surface is formed to restrict movement.
In this case, even if the sliding member fitted into the groove of the holder tries to come out of the groove, the regulating surface of the pin can prevent the pin from moving from the protruding position to the retracted position. Thereby, the tip of the pin is held in a state of being engaged with the engagement hole, so that it is possible to suppress the sliding material from slipping out of the groove of the holder.

(6) The sliding bearing of the present invention is a sliding bearing disposed between an upper structure and a lower structure, and is provided in one of the upper structure and the lower structure. A sliding material unit according to any one of claims 5 to 9; a smooth plate provided on the other of the upper structure and the lower structure, on which the sliding material of the sliding material unit slides; Equipped with.
According to this sliding bearing, the same effects as those of the sliding member unit described above are achieved.

According to the present invention, the sliding member can be fixed to the holder without using adhesive or countersunk screws.

FIG. 1 is a side sectional view of a sliding bearing according to a first embodiment of the present invention. FIG. 3 is a plan view of the sliding bearing seen from above. FIG. 2 is an enlarged sectional view of section A in FIG. 1. FIG. It is a perspective view showing a pin. FIG. 3 is a side sectional view showing a state before the sliding member is fitted into the groove of the holder. FIG. 6 is a side sectional view showing a state in which the tapered surface of the pin is in contact with the holder while the sliding member is being fitted into the groove of the holder. FIG. 6 is a side cross-sectional view showing a state in which the pin has moved to the retracted position while the sliding member is being fitted into the groove of the holder. FIG. 7 is an enlarged side sectional view showing a structure for fixing a sliding member to a holder in a sliding bearing according to a second embodiment of the present invention. FIG. 7 is a side sectional view showing a state before the sliding member of the second embodiment is fitted into the groove of the holder. FIG. 7 is a side sectional view showing a state in which the tapered surface of the pin is in contact with the holder while the sliding member of the second embodiment is being fitted into the groove of the holder. FIG. 7 is a side sectional view showing a state in which the pin has moved to the retracted position while the sliding member of the second embodiment is being fitted into the groove of the holder. FIG. 7 is an enlarged side sectional view showing a structure for fixing a sliding member to a holder in a sliding bearing according to a third embodiment of the present invention. FIG. 13 is a perspective view showing a pin of the fixing structure of FIG. 12; FIG. 7 is an enlarged side sectional view showing a structure for fixing a sliding member to a holder in a sliding bearing according to a fourth embodiment of the present invention. FIG. 15 is a perspective view showing a pin of the fixing structure of FIG. 14; It is an enlarged sectional side view showing the fixation structure of the sliding material to the holder in the sliding bearing concerning a 5th embodiment of the present invention. FIG. 17 is a perspective view showing a pin of the fixing structure of FIG. 16;

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[First embodiment]
<Sliding bearing>
FIG. 1 is a side sectional view of a sliding bearing according to a first embodiment of the present invention. FIG. 2 is a plan view of the sliding support (the structure of the holder 23 and below, which will be described later), viewed from above. In FIGS. 1 and 2, the sliding bearing 1 of this embodiment is arranged between a lower structure 51 and an upper structure 52 of a structure such as a building or a detached house. It consists of a rigid sliding support that allows the structure 51 to slide freely in the horizontal direction.

The sliding bearing 1 includes a smooth plate unit 10 installed on the upper surface of the lower structure 51 and a sliding member unit 20 installed on the lower surface of the upper structure 52.
The smooth plate unit 10 includes a sole plate 11 fixed to the upper surface of a lower structure 51 and a smooth plate (slide plate) 12 fixed to the upper surface of the sole plate 11.

The sole plate 11 is formed of a metal plate (for example, a steel plate such as general structural rolled steel) to have a square outer shape. The smooth plate 12 is made of a metal plate and has an octagonal outer shape that is slightly smaller than the sole plate 11, for example. The upper surface of the smooth plate 12 is a sliding surface 12a on which a sliding surface 24a of a sliding member 24, which will be described later, slides. The sliding surface 12a of the smooth plate 12 is smoothed by polishing, for example, in order to reduce frictional resistance and improve sliding performance with the sliding surface 24a of the sliding material 24.

Note that the outer shape of the sole plate 11 is not limited to a square shape, but may be other shapes such as a rectangular shape or a circular shape. Further, the outer shape of the smooth plate 12 is not limited to an octagonal shape, but may be other shapes such as a rectangular shape or a circular shape.

<Sliding material unit>
The sliding material unit 20 includes a base pot 21, an elastic rubber 22, a holder (piston) 23, and a sliding material (bearing) 24. In addition, in FIG. 2, illustration of the base pot 21 and the elastic rubber 22 is omitted for convenience of explanation.

The base pot 21 is made of a steel plate such as general structural rolled steel, and has a square outer shape. The base pot 21 is fixed to the lower surface of the upper structure 52. The base pot 21 is formed with a groove 21a that opens downward. Although not shown, the groove 21a is formed in a circular shape when viewed from above.

The holder 23 is made of a metal plate (for example, a stainless steel plate) and has a circular outer shape. The upper end of the holder 23 is fitted into the groove 21a of the base pot 21. A sheet-like elastic rubber 22 is interposed between the bottom surface of the groove 21a and the top surface of the holder 23. A circular groove portion 23a is formed in the lower surface of the holder 23 when viewed from above.

The sliding member 24 is formed into a circular outer shape by a plate made of a synthetic resin such as a fluororesin such as polytetrafluoroethylene (PTFE), a polyethylene resin, a polyamide resin, or a polyacetal resin. The sliding member 24 is fitted into the groove 23a of the holder 23. The lower surface of the sliding member 24 is a sliding surface 24a that slides against the sliding surface 12a of the smooth plate 12.

Note that the outer shape of the base pot 21 is not limited to a square shape, but may be other shapes such as a rectangular shape or a round shape. Further, the outer shapes of the holder 23 and the sliding member 24 are not limited to circular shapes, but may be other shapes such as square shapes or rectangular shapes.

<Fixed structure of sliding material>
FIG. 3 is an enlarged sectional view of section A in FIG. 1 showing a structure for fixing the sliding member 24 to the holder 23. As shown in FIG. 2 and 3, a hole 25 extending radially inward is formed in the outer peripheral surface (side surface) 24b of the sliding member 24 at a position facing the inner peripheral surface (side surface) 23b of the groove portion 23a. A plurality of holes 25 (for example, two holes as shown in FIG. 2) are formed on the outer peripheral surface 24b of the sliding member 24 at equal intervals in the circumferential direction. The inner surface 25a of each hole 25 is formed into a circular shape. A pin 26 is provided in each hole 25. In addition, in FIG. 2, the hole 25 and the pin 26 are shown slightly enlarged for convenience (the same applies to the spring member 27 and the engagement hole 28, which will be described later).

FIG. 4 is a perspective view showing the pin 26. 3 and 4, the pin 26 has a tip 26a and a body 26b connected to the tip 26a. A conical tapered surface 26c is formed on the outer surface of the tip portion 26a in this embodiment. The body portion 26b of this embodiment is formed into a cylindrical shape with the axis C as the center. The outer diameter of the body portion 26b is slightly smaller than the hole diameter of the hole portion 25 (inner surface 25a). Thereby, the outer surface 26b1 of the body portion 26b is formed into a circular shape that is rotatable around the axis C with respect to the hole portion 25. The outer diameter of the distal end portion 26a at its base end (the end connected to the body portion 26b) is the same as the outer diameter of the body portion 26b.

With the above configuration, the pin 26 is provided in the hole 25 so as to be movable in the radial direction. Specifically, the pin 26 has a protruding position in the hole 25 where the tip 26a protrudes from the outer peripheral surface 24b of the sliding member 24 (FIG. 3), and a position where the entire pin 26 including the tip 26a is recessed into the hole 25. It is movable between the immersed position (FIG. 7).

In FIGS. 2 and 3, each hole 25 is provided with a spring member 27 radially inside the pin 26. As shown in FIG. In this embodiment, a compression coil spring, for example, is used as the spring member 27. The spring member 27 is in a free state when the pin 26 is in the extended position. From this state, when the pin 26 moves radially inward (toward the retracted position) from the protruding position, the spring member 27 contracts from its free state. As a result, the spring member 27 biases the pin 26 radially outward (towards the protruding position) by its elastic restoring force.

In the inner peripheral surface 23b of the groove 23a of the holder 23, a plurality of engagement holes 28, the same number as the pins 26, are formed at equal intervals in the circumferential direction. Each engagement hole 28 is formed in the inner circumferential surface 23b of the groove 23a at a position where the sliding member 24 is fitted into the groove 23a and is arranged radially opposite each pin 26. Each engagement hole 28 is formed in a conical shape (see also FIG. 5). Each engagement hole 28 is engaged with a tip 26a of the pin 26 in a protruding position. As a result, the sliding member 24 is fitted into the groove 23a of the holder 23 and fixed.

<How to fix sliding material>
Next, a method for fixing the sliding member 24 to the groove portion 23a of the holder 23 will be described with reference to FIGS. 3 and 5 to 7. First, as shown in FIG. 5, the sliding member 24 is placed below the holder 23. At this time, in each hole 25 of the sliding member 24, the spring member 27 is in a free state and the pin 26 is in a protruding position.

From the state shown in FIG. 5, the sliding member 24 is moved upward toward the groove 23a of the holder 23. Then, as shown in FIG. 6, with the upper end of the sliding member 24 fitted into the groove 23a, the tapered surface 26c of each pin 26 in the protruding position is aligned with the lower surface 23c of the holder 23 (opening edge of the groove 23a). comes into contact with.

When the sliding member 24 is further moved upward from the state shown in FIG. 6, the tapered surface 26c of each pin 26 is pressed against the lower surface 23c of the holder 23, thereby pressing each pin 26 from the protruding position to the retracted position. A force is generated. As a result, each pin 26 moves from the protruding position to the retracted position against the elastic restoring force of the spring member 27, as shown in FIG. In this state, each pin 26 is held in the retracted position by the tip of the tip 26a abutting the inner circumferential surface 23b of the groove 23a.

When the sliding material 24 is further moved upward from the state shown in FIG. 7, the top surface of the sliding material 24 comes into contact with the bottom surface of the groove 23a, as shown in FIG. It will be in a fitted state. In this state, each pin 26 is disposed facing the engagement hole 28, so that the contact between the tip 26a of each pin 26 and the inner circumferential surface 23b of the groove 23a is released. Then, each pin 26 returns from the retracted position to the protruded position due to the elastic restoring force of the spring member 27, and the tip end 26a of each pin 26 engages with the engagement hole 28 of the holder 23. As a result, the sliding member 24 is fitted into the groove 23a of the holder 23 and fixed.

<Effect>
According to the sliding bearing 1 of the first embodiment, when the sliding member 24 is fitted into the groove 23a of the holder 23, the tapered surface 26c formed on the tip 26a of each pin 26 in the protruding position is aligned with the lower surface of the holder 23. 23c, a force is generated that presses each pin 26 toward the retracted position. As a result, each pin 26 moves from the protruding position to the retracted position against the elastic restoring force of the spring member 27, so that the sliding member 24 can be fitted into the groove 23a of the holder 23. When the sliding member 24 is fitted into the groove 23a of the holder 23, the pins 26 are arranged facing the engagement holes 28 of the holder 23, and the force pressing each pin 26 toward the retracted position is released, so that the retracted position Each pin 26 located at the position returns to the protruding position by the elastic restoring force of the spring member 27.

As a result, the tip end portion 26a of each pin 26 that has returned to the protruding position is engaged with each engagement hole 28, so that the sliding member 24 can be fixed to the holder 23 without using adhesive or countersunk screws. . As a result, the sliding member 24 can be reliably fixed to the groove portion 23a of the holder 23 regardless of the material of the synthetic resin sliding member 24. Further, since there is no need to form a countersunk hole in the sliding surface 24a of the sliding member 24 for inserting a countersunk screw, the contact area between the sliding member 24 and the smooth plate 12 does not decrease. Thereby, it is also possible to suppress the sliding member 24 from increasing in size.

The outer surface 26b1 of the body 26b of the pin 26 is formed in a shape that allows the body 26b to rotate around the axis C with respect to the hole 25, and the outer surface of the tip 26a of the pin 26 has a conical shape. A tapered surface 26c is formed. As a result, even if the body part 26b of the pin 26 in the protruding position rotates around the axis C with respect to the hole part 25 and shifts when the sliding member 24 is fitted into the groove part 23a of the holder 23, the tip of the pin 26 Since the tapered surface 26c is always present in the portion 26a, the tapered surface 26c of the pin 26 can be reliably brought into contact with the lower surface 23c of the holder 23. Thereby, the work of fitting the sliding member 24 into the groove portion 23a of the holder 23 can be easily performed.

Further, since the outer surface 26b1 of the body portion 26b of the pin 26 is formed in a circular shape, the pin 26 can be manufactured easily.

[Second embodiment]
FIG. 8 is an enlarged side sectional view showing a structure for fixing the sliding member 24 to the holder 23 in the sliding bearing 1 according to the second embodiment of the present invention. The second embodiment differs from the first embodiment in that a hole 25, a pin 26, and a spring member 27 are provided in the holder 23, and an engagement hole 28 is formed in the sliding member 24. The differences will be specifically explained below.

<Fixed structure of sliding material>
A hole 25 extending radially outward is formed in the inner circumferential surface (side surface) 23b of the groove portion 23a of the holder 23 at a position facing the outer circumferential surface (side surface) 24b of the sliding member 24. A plurality of (for example, two) holes 25 are formed at equal intervals in the circumferential direction on the inner peripheral surface 23b of the groove 23a. A pin 26 is provided in each hole 25. The pin 26 has two positions in the hole 25: a protruding position (FIG. 8) where the tip 26a protrudes from the inner circumferential surface 23b of the groove 23a, and a retracted position (FIG. 8) where the entire pin 26 including the tip 26a is recessed into the hole 25. 11).

A spring member 27 is provided in each hole 25 on the outside of the pin 26 in the radial direction. The spring member 27 is in a free state when the pin 26 is in the extended position. From this state, when the pin 26 moves radially outward (toward the retracted position) from the protruding position, the spring member 27 contracts from its free state. As a result, the spring member 27 biases the pin 26 radially inward (towards the protruding position) by its elastic restoring force.

A plurality of engagement holes 28, the same number as the pins 26, are formed in the outer peripheral surface 24b of the sliding member 24 at equal intervals in the circumferential direction. Each engagement hole 28 is formed on the outer circumferential surface 24b of the sliding member 24 at a position so as to face each pin 26 in the radial direction when the sliding member 24 is fitted into the groove 23a. Each engagement hole 28 is engaged with a tip 26a of the pin 26 in a protruding position. As a result, the sliding member 24 is fitted into the groove 23a of the holder 23 and fixed.
The other configurations of the second embodiment are the same as those of the first embodiment, so the same reference numerals are given and the description thereof will be omitted.

<How to fix sliding material>
Next, a method for fixing the sliding member 24 to the groove 23a of the holder 23 in the second embodiment will be described with reference to FIGS. 8 to 11. First, as shown in FIG. 9, the sliding member 24 is placed below the holder 23. At this time, the spring member 27 is in a free state in each hole 25 of the holder 23, and the pin 26 is in a protruding position.

From the state shown in FIG. 9, the sliding member 24 is moved upward toward the groove 23a of the holder 23. Then, as shown in FIG. 10, with the upper end of the sliding member 24 fitted into the groove 23a, the tapered surface 26c of each pin 26 in the protruding position comes into contact with the outer peripheral edge of the upper surface 24c of the sliding member 24. .

When the sliding member 24 is further moved upward from the state shown in FIG. 10, the tapered surface 26c of each pin 26 is pressed against the upper surface 24c of the sliding member 24, thereby moving each pin 26 from the protruding position to the retracted position. A pressing force is generated. As a result, each pin 26 moves from the protruding position to the retracted position against the elastic restoring force of the spring member 27, as shown in FIG. In this state, each pin 26 is held in the retracted position by the tip of the tip portion 26a abutting against the outer circumferential surface 24b of the sliding member 24.

When the sliding member 24 is further moved upward from the state shown in FIG. 11, the upper surface 24c of the sliding member 24 comes into contact with the bottom surface of the groove 23a, as shown in FIG. It will be stuck in. In this state, each pin 26 is disposed facing the engagement hole 28, so that the contact between the tip 26a of each pin 26 and the outer circumferential surface 24b of the sliding member 24 is released. Then, each pin 26 returns from the retracted position to the protruded position due to the elastic restoring force of the spring member 27, and the tip end 26a of each pin 26 engages with the engagement hole 28 of the sliding member 24. As a result, the sliding member 24 is fitted into the groove 23a of the holder 23 and fixed. As described above, the sliding bearing 1 of the second embodiment also has the same effects as the first embodiment.

[Third embodiment]
FIG. 12 is an enlarged side sectional view showing a structure for fixing the sliding member 24 to the holder 23 in the sliding bearing 1 according to the third embodiment of the present invention. FIG. 13 is a perspective view showing the pin 26 of the fixing structure of FIG. 12. The third embodiment is a modification of the first embodiment, and differs from the first embodiment in the shapes of the hole 25, pin 26, and engagement hole 28. The differences will be specifically explained below.

<Fixed structure of sliding material>
In FIGS. 12 and 13, the pin 26 has a tip portion 26d formed in the shape of a triangular prism, and a body portion 26e formed in the shape of a quadrangular prism and connected to the tip portion 26d. Although not shown, the hole 25 of the sliding member 24 is formed into a rectangular column shape that is slightly larger than the body 26e of the pin 26. As a result, the inner surface 25b of the hole 25 and the outer surface 26e1 of the body 26e of the pin 26 are each formed in a rectangular shape in which the body 26e cannot rotate relative to the hole 25.

The tip 26d of the pin 26 is formed in an isosceles triangular shape with the tip as the apex in a side view of FIG. Planar tapered surfaces 26f are formed on the upper and lower sides of the distal end portion 26d, respectively, so as to taper from the base end toward the distal end. The upper tapered surface 26f comes into contact with the lower surface 23c of the holder 23 when the sliding member 24 is fitted into the groove 23a of the holder 23, thereby generating a force that presses the pin 26 from the protruding position to the retracted position.

The engagement hole 28 of the holder 23 is formed in the shape of a triangular prism to match the shape of the tip 26d of the pin 26, and is formed in the shape of an isosceles triangle when viewed in cross section in FIG. A tip 26d of the pin 26 in the protruding position is engaged with the engagement hole 28.
The other configurations of the third embodiment are the same as those of the first embodiment, so the same reference numerals are given and the description thereof will be omitted.

<Effect>
According to the sliding bearing 1 of the third embodiment, the sliding member 24 can be fixed to the holder 23 without using adhesive or countersunk screws, as in the first embodiment.
Further, in this embodiment, the inner surface 25b of the hole 25 and the outer surface 26e1 of the body 26e of the pin 26 are formed in such a shape that the body 26e cannot rotate relative to the hole 25, so the pin 26 The distal end portion 26d does not rotate while engaged with the engagement hole 28. Thereby, it is possible to suppress the tip end portion 26d of the pin 26 from being worn out. As a result, it is possible to prevent the distal end portion 26d of the pin 26 from being worn out and disengaged from the engagement hole 28.

[Fourth embodiment]
FIG. 14 is an enlarged side sectional view showing a structure for fixing the sliding member 24 to the holder 23 in the sliding bearing 1 according to the fourth embodiment of the present invention. FIG. 15 is a perspective view showing the pin 26 of the fixing structure of FIG. 14. The fourth embodiment is a modification of the third embodiment, and differs from the third embodiment in the shapes of the tip 26d of the pin 26 and the engagement hole 28. The differences will be specifically explained below.

<Fixed structure of sliding material>
In FIGS. 14 and 15, the tip 26d of the pin 26 is formed into a trapezoidal shape when viewed from the side. A planar tapered surface 26g is formed on the upper side of the distal end portion 26d so as to taper from the base end toward the distal end. The tapered surface 26g comes into contact with the lower surface 23c of the holder 23 when the sliding member 24 is fitted into the groove 23a of the holder 23, thereby generating a force that presses the pin 26 from the protruding position to the retracted position. A regulating surface 26h is formed on the lower side of the distal end portion 26d and is flush with the lower surface of the body portion 26e from the base end toward the distal end. Although the distal end portion 26d is formed in a trapezoidal shape when viewed from the side, it may be formed into a right triangular shape when viewed from the side so that the distal end is pointed.

The engagement hole 28 of the holder 23 is formed in a different shape from the tip end 26d of the pin 26. The engagement hole 28 of this embodiment is formed in the shape of a square prism, which is the same shape as the body 26e of the pin 26. A tip 26d of the pin 26 in the protruding position is engaged with the engagement hole 28. The lower surface of the engagement hole 28 is a contact surface 28a with which the regulating surface 26h of the pin 26 in the protruding position makes surface contact.

When the sliding member 24 tries to move in the direction of coming out of the groove 23a (downward in FIG. 14) from the state shown in FIG. No force is generated to press 26 from the protruding position to the retracted position. Therefore, even if the sliding member 24 attempts to move in the direction of coming out of the groove 23a with the tip end 26d of the pin 26 engaged with the engagement hole 28, the pin 26 is prevented from moving from the protruding position to the retracted position. be able to.
The other configurations of the fourth embodiment are the same as those of the third embodiment, so the same reference numerals are given and the description thereof will be omitted.

<Effect>
According to the sliding bearing 1 of the fourth embodiment, the same effects as those of the third embodiment are achieved.
Furthermore, in this embodiment, even if the sliding member 24 fitted into the groove 23a of the holder 23 tries to come out from the groove 23a, the regulating surface 26h of the pin 26 prevents the pin 26 from moving from the protruding position to the retracted position. can do. Thereby, the tip end 26d of the pin 26 is held in a state of being engaged with the engagement hole 28 of the holder 23, so that slipping of the sliding member 24 from the groove 23a of the holder 23 can be suppressed. Furthermore, as long as the engagement hole 28 has the contact surface 28a, it may be formed in a shape different from that of the tip end 26d of the pin 26, so that the degree of freedom in machining the engagement hole 28 can be increased. .

[Fifth embodiment]
FIG. 16 is an enlarged side sectional view showing a structure for fixing the sliding member 24 to the holder 23 in the sliding bearing 1 according to the fifth embodiment of the present invention. FIG. 17 is a perspective view showing the pin 26 of the fixing structure of FIG. 16. The fifth embodiment is a modification of the fourth embodiment, and differs from the fourth embodiment in the shapes of the hole 25, pin 26, and engagement hole 28. The differences will be specifically explained below.

<Fixed structure of sliding material>
16 and 17, the pin 26 has a tip 26i and a body 26k connected to the tip 26i. The tip portion 26i has a flat lower surface, a semi-cylindrical upper surface, and a trapezoidal shape when viewed from the side in FIG. 16. The body portion 26k has a flat lower surface, a semi-cylindrical upper surface, and a rectangular shape when viewed from the side in FIG. 16. Although the top portion of the tip portion 26i is formed in a semi-cylindrical shape, the entire portion except the bottom surface may be formed in a semi-cylindrical shape. In that case, the entire body portion 26k except for the lower surface may be formed into a semi-cylindrical shape, similar to the tip portion 26i.

Although not shown, the hole 25 of the sliding member 24 is formed to be slightly larger than the body 26k of the pin 26 along the outer peripheral shape of the body 26k. As a result, the inner surface 25c of the hole 25 and the outer surface 26k1 of the body 26k of the pin 26 are each formed in such a shape that the body 26k cannot rotate relative to the hole 25.

A planar tapered surface 26m is formed above the tip 26i of the pin 26 so as to taper from the base to the tip. The tapered surface 26m comes into contact with the lower surface 23c of the holder 23 when the sliding member 24 is fitted into the groove 23a of the holder 23, thereby generating a force that presses the pin 26 from the protruding position to the retracted position.

The engagement hole 28 of the holder 23 is formed in a different shape from the tip end 26i of the pin 26. The engagement hole 28 of this embodiment has, for example, the same shape as the body portion 26k of the pin 26, that is, the lower surface is formed flat, the upper side is formed in a semi-cylindrical shape, and in a cross-sectional view in FIG. 16, it is formed in a square shape. has been done. A tip 26i of the pin 26 in a protruding position is engaged with the engagement hole 28. The other configurations of the fifth embodiment are the same as those of the fourth embodiment, so the same reference numerals are given and the description thereof will be omitted.
As described above, the sliding bearing 1 of the fifth embodiment also has the same effects as the fourth embodiment.

[others]
Although the sliding bearing 1 in each of the above embodiments has been described as being applied to a rigid sliding bearing, it can also be applied to other types of sliding bearings, such as an elastic sliding bearing provided with laminated rubber or a smooth sliding bearing. It can also be applied to a sliding bearing having a simple structure in which the plate unit 10 is composed of only the smooth plate 12 and the sliding member unit 20 is composed of only the holder 23 and the sliding member 24.

In the sliding bearing 1 in each of the above embodiments, the lower structure 51 is provided with the smooth plate unit 10, and the upper structure 52 is provided with the sliding member unit 20, but the lower structure 51 is provided with the sliding member unit 20, and the upper The structure 52 may be provided with a smooth plate unit 10.
The sliding support 1 in each of the embodiments described above may use a combination of a fixing structure using the pin 26 and an adhesive that adheres the sliding material 24 to the groove 23a of the holder 23.

In each of the above embodiments, a compression coil spring is used as the spring member 27, but other springs such as a disc spring may also be used.
The number of holes 25, pins 26, spring members 27, and engagement holes 28 may be three or more. Further, the shape of the pin 26 is not limited to the above-described embodiments; for example, the body of the pin 26 may be formed into a triangular prism shape.

In the fourth embodiment (FIG. 14) and the fifth embodiment (FIG. 16), the shape of the engagement hole 28 is different from that of the tips 26d and 26i of the pin 26, but As in the third embodiment (FIGS. 3, 8, and 12), it may be formed in the same shape as the tip portions 26d, 26i of the pin 26.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above-mentioned meaning, and is intended to include meanings equivalent to the claims and all changes within the scope.

1 Sliding support 12 Smooth plate 20 Sliding material unit 23 Holder 23a Groove 23b Inner peripheral surface (side surface)
24 Sliding material 24b Outer surface (side surface)
25 Hole 25a, 25b, 25c Inner surface 26 Pin 26a, 26d, 26i Tip 26b, 26e, 26k Body 26b1, 26e1, 26k1 Outer surface 26c, 26f, 26g, 26m Tapered surface 26h Regulation surface 27 Spring member 28 Engagement hole 51 Lower structure 52 Upper structure

Claims (6)

a holder having a groove;
a sliding material fitted into the groove;
A protrusion position provided in a plurality of holes formed in one of the side surfaces of the groove portion and the side surface of the sliding material that face each other, and in which the tip portion protrudes from the one side surface; a plurality of pins that are movable between a recessed position in which the pins are recessed into the hole;
a plurality of spring members, each of which is provided in each of the plurality of holes, is in a free state when each of the pins is in the protruding position, and returns each of the pins in the retracted position to the protruding position by an elastic restoring force; ,
On the other side of the side surface of the groove and the side surface of the sliding material, the sliding material is formed at a position facing each of the pins while being fitted into the groove, and facing each of the pins. a plurality of engagement holes in which the tip of each of the pins engages in the arranged state;
When the sliding member is fitted into the groove, the tip of each of the pins comes into contact with the holder in which the engagement hole is formed or the sliding member, so that each of the pins is in the protruding position. A sliding material unit formed with a tapered surface that generates a force that presses the pin toward the retracted position against the elastic restoring force. The pin has the tip and a body connected to the tip,
The outer surface of the body is formed in a shape that allows the body to rotate with respect to the hole,
The sliding material unit according to claim 1, wherein the conical tapered surface is formed on an outer surface of the tip. The sliding material unit according to claim 2, wherein the outer surface of the body is formed into a circular shape. The pin has the tip and a body connected to the tip,
The sliding material unit according to claim 1, wherein the inner surface of the hole and the outer surface of the body are each formed in a shape that prevents the body from rotating with respect to the hole. The tip portion is provided with a mechanism that prevents the pin from moving from the protruding position to the retracted position even if the sliding member attempts to move in the direction of coming out of the groove while the tip portion is engaged with the engagement hole. The sliding material unit according to claim 4, wherein a regulating surface is formed to regulate the sliding member. A sliding bearing disposed between an upper structure and a lower structure,
The sliding material unit according to any one of claims 1 to 5, which is provided in one of the upper structure and the lower structure;
A sliding bearing comprising: a smooth plate provided on the other of the upper structure and the lower structure, on which the sliding member of the sliding member unit slides.

Images