JP2001003927A - Shaft lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply a lubricant to a generation position of a friction torque. SOLUTION: The device is provided with a member 2 to be pivoted through which a pivot shaft 1 is penetrated in the relatively rotatable state with the pivotally supported shaft 1; flat plate-like friction plates 3, 4 through which the pivot shaft 1 is penetrated in the state of a restricted rotation and which are provided at least both sides of the member 2 to be pivoted and are superposed on the member 2 to be pivoted; and an elastic pressurization member 6 through which the pivotally supported shaft 1 is penetrated and which retains a relative angle of the pivotally supported shaft 1 and the member 2 to be pivoted to an optional angle by pressing a superposed state of the friction plates 3, 4 and the member 2 to be pivoted. Lubricant-retaining portions 8, 9 for feeding a lubricant to a superposed portion of the member 2 to be pivoted and the friction plates 3, 4 are provided on the member 2 to be pivoted or/and the friction plates 3, 4. A leak-preventing means 5 for preventing a lubricant leak is provided close to the lubricant-retaining portions 8, 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to portable terminal devices such as notebook personal computers, notebook word processors,
The present invention relates to a shaft lock device that is incorporated in a display device such as a CD monitor, or a member that needs to be tilted, such as a rotary lid of various machines.

[0002]

FIG. 8 shows a conventional shaft lock device. The shaft lock device includes a pivot shaft 100, a bracket 110 as a member to be rotated, and a wave spring 120, and is attached to a display panel or the like in which the pivot shaft 100 needs to perform tilt adjustment. Bracket 11
0 is attached to the apparatus main body to which a display panel or the like is attached.

A pivot shaft 100 has a mounting shaft portion 102 and a connecting shaft portion 103 for mounting to a counterpart member (not shown) such as a display panel extending coaxially from both sides of a large-diameter flange portion 101. I have. The attachment shaft 102 has a fixing hole 104 for attachment to a mating member. The connection shaft 103 attaches the bracket 110 and the wave spring 120. The mounting shaft portion 102 and the connecting shaft portion 103 are formed into a non-circular shape in which opposing portions are cut in parallel by performing a cutting process.

The bracket 110 is bent in an L-shape in which a bearing plate portion 112 stands upright from a fixed plate portion 111, and the fixed plate portion 111 is connected to a support member (not shown) such as an apparatus main body. In order to perform this connection, mounting holes 113 are formed in the fixing plate portion 111. On the other hand, a shaft hole 114 is formed in the bearing plate portion 112, and the pivot shaft 10 is formed in the shaft hole 114.
No. 0 connecting shaft 103 penetrates. Since the shaft hole 114 is formed in a circular shape, the pivot shaft 100 is rotatably penetrated, and therefore, the pivot shaft 100 and the bracket 110 are relatively rotatable.

In this shaft lock device, the friction plates 130 and 140 are arranged on both sides of the bracket 110. Each of the friction plates 130 and 140 has a connecting shaft portion 103 of the pivot shaft 100 penetrating therethrough, and its shaft holes 131 and 141 are formed in the same non-circular shape as the connecting shaft portion 10 so that the pivot shaft 1 is formed.
00 and rotate together. Also, shaft hole 1
Lubricant holding holes 132 and 142 in which lubricant such as grease is filled are formed around 31, 141.

The wave spring 120 has a friction plate 140
It is arranged outside. The shaft hole 121 of the wave spring 120 has a circular shape, and the connecting shaft 103 of the pivot shaft 100 penetrates.

In assembling the shaft lock device having this structure, lubricant such as grease is filled in the lubricant holding holes 132 and 142 of the friction plates 130 and 140, and the friction plate 130, the bearing plate portion 112 of the bracket 110, and the friction plate The connection shaft 103 of the pivot shaft 100 is penetrated by the 140 and the wave spring 120, the connection shaft 103 is penetrated by the pressing plate 150, and the penetrating end of the connection shaft 103 is swaged. By this caulking, the wave spring 12
Since a pressing force of 0 acts, a frictional force is generated, and the pivot shaft 1
The relative angle between 00 and the bracket 110 can be maintained at an arbitrary angle.

[0008]

In the above-mentioned conventional shaft lock device, the lubricant may leak from the friction plate 140 disposed on the wave spring 120 side. In addition, there is a problem in that the outflow of the lubricant makes it impossible to secure the stability of the torque by the lubricant or contaminate the surroundings. In addition, there is also a problem that the foreign matter enters between the friction plate 140 and the wave spring 120 and bites, so that the rotation of the friction plate 140 becomes poor.

The present invention has been made in consideration of such conventional problems, and it is possible to prevent a lubricant from leaking out, to generate a stable torque, and to prevent foreign matter from being caught. It is an object of the present invention to provide a shaft lock device capable of preventing the occurrence of the shaft lock.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a rotating member through which a pivot shaft penetrates while being rotatable relative to the pivot shaft, and rotation is restricted. In this state, the pivot shaft penetrates, and a flat plate-shaped friction plate provided on at least both sides of the member to be rotated and overlapped with the member to be pivoted; An elastic pressing member for maintaining a relative angle between the pivot shaft and the member to be rotated at an arbitrary angle by applying pressure to a state in which the member is overlapped with the rotating member; A lubricant holding portion for supplying a lubricant to the overlapping portion with the lubrication member is provided on the rotatable member and / or the friction plate, and is in close contact with the lubricant holding portion to prevent leakage of the lubricant. Means are provided.

In the present invention, since the rotation of the flat friction plate is restrained with respect to the pivot shaft, the friction plate is rotated when the pivot shaft and the pivoted member rotate relative to each other. And rotate integrally with the pivot shaft in a state of being overlapped. Since the elastic pressure member presses the superposed state of the member to be rotated and the friction plate, friction torque is generated, and the relative angle between the member to be rotated and the pivot shaft can be maintained at an arbitrary angle. it can.

Further, since the rotatable member and / or the friction plate is provided with a lubricant holding portion, the lubricant is supplied to the overlapped portion during the relative rotation, thereby stabilizing the friction torque. Can be done. The leak prevention means can prevent the lubricant from leaking from the lubricant holding portion, so that the lubricant can continue to stabilize the friction torque,
Good operation can be ensured. Furthermore, since the leak preventing means is in close contact with the lubricant holding portion, foreign matter does not enter and it is possible to prevent foreign matter from being caught.

According to a second aspect of the present invention, in the first aspect of the present invention, the lubricant holding portion is provided on the friction plate, and the leakage preventing means has a flat surface which is in close contact with the friction plate. It is characterized by being a medicine holding plate.

According to the present invention, since the flat surface of the lubricant holding plate is in close contact with the friction plate provided with the lubricant holding portion, it is possible to prevent the leakage of the lubricant and the entry of foreign matter.

According to a third aspect of the present invention, in the first aspect of the present invention, the lubricant holding portion is provided on the friction plate, and the elastic pressing member is overlapped on the friction plate. The leakage prevention means is a contact surface of an elastic pressing member having a flat surface facing the friction plate.

In the present invention, the contact surface of the flat elastic pressing member faces the friction plate, and the contact surface is in close contact with the friction plate, so that leakage of the lubricant from the friction plate is prevented. At the same time, entry of foreign matter can be prevented.

According to a fourth aspect of the present invention, in the first aspect of the invention, the lubricant holding portion is provided on the rotated member, and the leakage preventing means is provided on a surface facing the rotated member. Is a contact surface of a friction plate having a flat surface.

According to the present invention, the contact surface of the friction plate, which is a flat surface, faces the member to be rotated, and the contact surface is in close contact with the member to be rotated. Leakage can be prevented and foreign matter can be prevented from entering.

A fifth aspect of the present invention is the invention according to any one of the first to fourth aspects, wherein the lubricant holding portion is a through-hole penetrating the member to be rotated and / or the friction plate. Features,

By making the lubricant holding portion a through hole,
A large amount of lubricant can be secured. Therefore, stable friction torque can be maintained for a long period of time.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the friction plates are provided on both sides of the rotatable member so as to overlap from both sides of the rotatable member. And a plurality of the elastic pressure members are provided so as to press against the rotatable members of the respective friction plates.

According to the present invention, a plurality of elastic pressure members are provided, and the amount of deflection of the entire elastic pressure member can be increased. Therefore, the friction torque can be adjusted over a wide range.

According to a seventh aspect of the present invention, there is provided a pivotable member through which the pivot shaft penetrates in a rotatable state with respect to the pivot shaft, and a first member fixedly superimposed on both sides of the pivot member. A friction plate, a second friction plate superimposed on the first friction plate while the pivot shaft penetrates in a state where the rotation is restricted, and a first friction plate with the pivot shaft penetrating; Plate and second
And an elastic pressing member for maintaining the relative angle between the pivot shaft and the rotatable member at an arbitrary angle by pressing against the overlapping state with the friction plate.

According to the present invention, since the second friction plate rotating integrally with the pivot shaft is superimposed on the first friction plate fixed to the member to be rotated, these first and second frictions are provided. Friction torque is generated between the plates, and the relative angle between the pivoted member and the pivot can be maintained at an arbitrary angle. In this structure, since the friction torque does not act on the rotated member, it is not necessary to consider the strength of the rotated member, and the material of the rotated member can be arbitrarily selected.

The invention of claim 8 is the invention of claim 7, wherein the first friction plate in the overlapping portion with the second friction plate has a lubricant holding portion filled with a lubricant. And wherein the first friction plate and the second friction plate are formed in a flat plate shape and are in close contact with each other.

In the present invention, since the lubricant holding portion is formed on the first friction plate, the friction torque can be stabilized by the lubricant. Since the second friction plate has a flat plate shape and is in close contact with the first friction plate, it is possible to prevent the lubricant from leaking from the lubricant holding portion and to prevent foreign matter from entering between the first and second friction plates. Disappears.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments shown in the drawings. In each of the embodiments, the same elements are denoted by the same reference numerals and correspond to each other.

(Embodiment 1) FIGS. 1 and 2 show Embodiment 1 of the present invention. The shaft lock device according to the present embodiment includes a pivot shaft 1, a bracket 2 as a member to be rotated,
The friction plates 3 and 4, a lubricant pressing plate 5, a wave spring 6 as an elastic pressing member, and a pressing plate 7 are provided.

The pivot shaft 1 has a thick flange 1a having a circular outer shape.
A mounting shaft portion 1b and a connecting shaft portion 1c extend coaxially from both sides of a. The mounting shaft portion 1b is mounted on a display panel (not shown) as a mating member, and has a fixing hole 1d for performing the mounting. The connecting shaft portion 1c has a smaller diameter than the mounting shaft portion 1b, and mounts the bracket 2, the friction plates 3, 4, the lubricant pressing plate 5, the wave spring 6, and the pressing plate 7. The connecting shaft portion 1c and the mounting shaft portion 1b are formed into a non-circular outer shape by performing parallel cutting.

In this embodiment, the end face 1e of the flange portion 1a of the pivot shaft 1 on the side of the bracket 2 is formed in a flat shape, so that when a friction plate 3 described later is overlapped, the friction plate 3 Adhere to one side of This close contact prevents the lubricant from leaking from the lubricant passage holding portion 8 provided on the friction plate 3.

The bracket 2 is bent in an L-shape in which a bearing plate 2b stands upright from the fixed plate 2a, and the fixed plate 2a is connected to a support member (not shown) such as an apparatus body on which a display panel is mounted. You. To perform this connection, a fixing hole 2c is formed in the fixing plate 2a.
On the other hand, a shaft hole 2d is formed in the bearing plate portion 2b, and the connecting shaft portion 1c of the pivot shaft 1 passes through the shaft hole 2d. Since the shaft hole 2d is formed in a circular shape, the pivot shaft 1 penetrates rotatably, whereby the pivot shaft 1 and the bracket 2 are relatively rotatable.

The friction plates 3 and 4 are provided on the flange 1a of the pivot shaft 1.
It is formed in a circular flat plate shape having a diameter substantially equal to that of.
These friction plates 3 and 4 are provided on the bearing plate 2 b of the bracket 2.
And are superimposed on the bearing plate 2b from both sides thereof. Each friction plate 3, 4
Are formed with the same non-circular shaft holes 3a and 4a as the outer shape of the connecting shaft portion 1c of the pivot shaft 1, and the connecting shaft portion 1c of the pivot shaft 1 penetrates in a fitted state. Therefore, the rotation of the friction plates 3 and 4 is restrained with respect to the pivot shaft 1, and the friction plates 3 and 4 rotate integrally with the pivot shaft 1 while being overlapped with the bracket 2. By this rotation, a friction torque can be generated at the contact surface where the friction plates 3 and 4 and the bracket 2 are in contact.

The friction plates 3 and 4 are provided with lubricant holding portions 8 and 9 filled with a lubricant such as grease. The lubricant holding portions 8, 9 are provided around the shaft holes 3a, 4a of the friction plates 3, 4, and supply the lubricant held therein to the friction torque generating surface (the contact surface with the bracket 2). It has become. As a result, a lubricating action is performed,
A stable friction torque can be ensured, and durability can be improved.

In the present embodiment, the lubricant holding portion 8,
Numeral 9 is a through hole penetrating the friction plates 3 and 4 in the plate thickness direction. Such a through-hole can be easily formed by pressing, can hold a large amount of lubricant, and can maintain stable friction torque for a long period of time. Instead of forming the lubricant holding portions 8 and 9 as through holes, grooves may be formed in the surfaces of the friction plates 3 and 4 to serve as lubricant holding portions.

The lubricant holding plate 5 as a leak preventing means is
It is arranged outside the friction plate 4 and is formed into a disk shape having the same diameter as the friction plate 4. Further, a non-circular shaft hole 5a having the same shape as the shaft hole 4a of the friction plate 4 is formed in the lubricant pressing plate 5, whereby the rotation with the pivot shaft 1 is restricted. With this, the connecting shaft portion 1c of the pivot shaft 1 penetrates. Therefore, the lubricant holding plate 5 rotates integrally with the friction plate 4.

The end surfaces 5b and 5c on both sides of the lubricant pressing plate 5 are formed in a flat flat shape. When the end surfaces 5b and 5c are overlapped on the friction plate 4 similarly formed in a flat shape, the friction of the lubricant pressing plate 5 is reduced. The end face 5b on the plate 4 side can contact the friction plate 4 in a close contact state. By making contact in such a close contact state, the lubricant in the lubricant holding portion 9 of the friction plate 4 can be prevented from leaking out, and foreign matter can be prevented between the friction plate 4 and the lubricant pressing plate 5. It can be prevented from entering.

A wave spring 6 as an elastic pressing member is arranged outside the lubricant pressing plate 5. The wave spring 6 exerts a pressing force by its elasticity, and has the same outer diameter as the friction plates 3 and 4 and the lubricant pressing plate 5. A circular shaft hole 6a is formed in the wave spring 6, and the connecting shaft portion 1c of the pivot shaft 1 passes through the shaft hole 6a.

The wave spring 6 is provided with elasticity by bending a hard metal plate such as a washer in the plate thickness direction. When a load is applied in the plate thickness direction, the pressing force in the plate thickness direction is reduced. Express. Thereby, as described later, since the friction plates 3 and 4 are pressed against the bracket 2, a friction torque is generated therebetween, and the relative angle between the pivot shaft 1 and the bracket 2 is maintained at an arbitrary angle. Can be.
In this pressurization, if it is in direct contact with the friction plate 4,
There is a possibility that the pressing force acts unevenly and deforms the friction plate 4. In this embodiment, however, the lubricant pressing plate 5 is interposed between the friction plate 4 and the wave spring 6, and the lubrication is performed. The pressing force is equalized by the agent pressing plate 5. Therefore, there is an advantage that the pressing force to the friction plate 4 is not unevenly distributed and the deformation of the friction plate 4 can be prevented.

The holding plate 7 is made of a flat washer and is arranged outside the wave spring 6. The holding plate 7 has an outer diameter equivalent to that of the wave spring 6, and is formed with a non-circular shaft hole 7a having the same outer shape as the connecting shaft portion 1c of the pivot shaft 1. The connection shaft 1c of the pivot shaft 1 penetrates while the rotation of the shaft 1 is restricted. Therefore, the holding plate 7 rotates integrally with the pivot 1.

To assemble the shaft lock device, lubricant such as grease is filled in the lubricant holding holes 8 and 9 of the friction plates 3 and 4, and the shaft hole 3a of the friction plate 3 and the shaft hole 2 of the bracket 2 are filled.
d, a shaft hole 4a of the friction plate 4, a shaft hole 5a of the lubricant holding plate 5,
Shaft hole 6a of wave spring 6 and shaft hole 7 of holding plate 7
a through the connecting shaft portion 1c of the pivot shaft 1, the connecting shaft portion 1c
By crimping the penetrating end of Reference numeral 10 in FIG. 2 denotes a caulked portion that performs this caulking.

By such caulking, as shown in FIG.
The friction plates 3 and 4 are overlapped on both sides of the bearing plate portion 2b of the bracket 2 and are in close contact with each other, and the lubricant pressing plate 5 is in close contact with the friction plate 4. Further, the wave spring 6 elastically presses the superposed state, and a friction torque is generated between the friction plates 3 and 4 and the bracket 2. Therefore, the pivot shaft 1
After the relative rotation of the bracket 2 and the bracket 2, the relative angle between the pivot shaft 1 and the bracket 2 can be maintained at an arbitrary angle.

In such an assembled state, the flat end face 1 e of the flange portion 1 a of the pivot shaft 1 is in close contact with the friction plate 3, and the end surface 5 b of the lubricant pressing plate 5 is in close contact with the friction plate 4. Therefore, it is possible to prevent the lubricant in the lubricant holding portions 8, 9 from leaking out to any of the friction plates 3, 4. Therefore, a stable friction torque can be maintained. In addition, foreign matter does not enter between them, and it is possible to prevent rotation failure due to foreign matter biting.

(Embodiment 2) FIG. 3 shows Embodiment 2 of the present invention. In the shaft lock device according to this embodiment, the elastic plate 11 is used as the elastic pressing member. The elastic plate 11 is disposed outside the friction plate 4 and is formed in a disk shape having the same outer diameter as the friction plate 4. Further, a circular shaft hole 11a through which the connecting shaft portion 1c of the pivot shaft 1 penetrates is formed in the central portion. As the elastic plate 11,
It uses resin such as rubber and elastomer,
A pressing force is applied by the elasticity of these resins.

The end faces 11b and 11c on both sides of the elastic plate 11
Is formed in a flat planar shape, and when it is superimposed on the friction plate 4, the end face 5b comes into contact with the friction plate 4 in a close contact state.
The contact in such a close contact state can prevent the lubricant in the lubricant holding portion 9 of the friction plate 4 from leaking out, and at the same time, foreign substances can be interposed between the friction plate 4 and the lubricant pressing plate 5. Intrusion can be prevented. The friction plate 3
, The end face 1e on the plane of the flange portion 1a of the pivot shaft 1 comes into close contact with the flange portion 1a, so that the leakage of the lubricant in the lubricant holding portion 8 is similarly prevented.

(Embodiment 3) FIG. 4 shows a shaft lock device according to Embodiment 3. In this shaft lock device, a lubricant holding portion 12 is provided on a bracket 2, and friction plates 3 and 4 are arranged on both sides of the bracket 2.

A plurality of lubricant holding portions 12 are provided around the shaft hole 2d in the bearing plate portion 2b of the bracket 2. Each lubricant holding portion 12 is formed of a through hole penetrating through the bearing plate portion 2b in the plate thickness direction, and the inside thereof is filled with a lubricant. The bearing plate 2b is formed in a flat plane.

The friction plates 3 and 4 are formed in a disk shape, and are superimposed on the bearing plate 2b of the bracket 2 from both sides. The friction plates 3 and 4 are formed to have a diameter that overlaps with the lubricant holding portion 12 provided on the bearing plate portion 2b. The end faces 3b, 3c, 4b, 4c on both sides of the friction plates 3, 4 are formed in a flat plane shape. Therefore, the end surfaces 3c and 4b of the friction plates 3 and 4 facing the bearing plate 2b can come into close contact with the bearing plate 2b.

Also in this embodiment, the friction plates 3, 4
The flat end faces 3c, 4b of the bearing plate 2 of the bracket 2
b, so as to cover the lubricant holding portion 12, so that the leakage of the lubricant can be prevented, and no foreign matter enters.

FIG. 5 shows a modification of the third embodiment. In this embodiment, wave springs 6 and 6 as elastic pressing members are arranged between the pivot shaft 1 and the friction plate 3 and between the friction plate 4 and the pressing plate 7, respectively. Therefore, pivot shaft 1
By pressing the end of the connecting shaft portion 1c, the pressing force of the plurality of wave springs 6, 6 acts. By providing the plurality of wave springs 6 and 6 in this manner, the amount of deflection can be increased, and thereby the friction torque can be adjusted over a wide range.

4 and 5, an elastic plate 11 shown in FIG. 3 can be used instead of the wave spring 6 as the elastic pressing member.

(Embodiment 4) FIGS. 6 and 7 show a shaft lock device according to a fourth embodiment. In this axis lock device,
The first friction plates 21 and 22 and the second friction plates 23 and 24 are used.

The first friction plates 21 and 22 are formed in a flat circular shape, and are arranged on both sides of the bearing plate 2 b of the bracket 2. On one surface of the first friction plate 21 facing the bracket 2, engagement projections 26, 26 are provided.
° formed at intervals. The engaging projections 27, 27 are also provided on the surface of the other friction plate 22 facing the bracket 2.
Although formed at intervals of 80 °, they are formed so as to be at positions orthogonal to the engagement protrusions 26 of the first friction plate 21.

On the other hand, the bearing plate 2b of the bracket 2
Are formed around the shaft hole 2d at 90 ° intervals. The engagement protrusions 26, 26, 27, 27 of the first friction plates 21, 22 are individually fitted into the engagement holes 28, and the first friction plates 21, 22,
2 is fixed to the bracket 2.

The first friction plates 21 and 22 are provided with a lubricant holding portion 29 formed of a through hole. The lubricant holding portion 29 is provided so as to be located between the engagement protrusions 26 and 27 on the respective friction plates 21 and 22. In addition, in the center portion of the first friction plates 21 and 22,
Circular shaft holes 21a and 22a are formed through which the connecting shaft portion 1c of the pivot shaft 1 penetrates in a rotatable state.

The second friction plates 23 and 24 are arranged outside the first friction plates 21 and 22. The second friction plates 23 and 24 are formed in the shape of a flat circular plate having substantially the same diameter as the first friction plates 21 and 22, and are brought into contact with the first friction plates 21 and 22 to thereby form the first friction plates. The lubricant holding portions 29 provided on the components 21 and 22 are covered.

At the center of the second friction plates 23 and 24,
Although the shaft holes 23a and 24a penetrate,
Reference numerals a and 24a are non-circular, similar to the outer shape of the connecting shaft portion 1c of the pivot shaft 1. Therefore, in the shaft holes 23a and 24a,
Since the connecting shaft portion 1c penetrates in the fitted state, the rotation of the second friction plates 23 and 24 is restricted with respect to the pivot shaft 1, and the second friction plates 23 and 24 rotate integrally with the pivot shaft 1.

FIG. 7 shows a state in which the shaft lock device is assembled, and the connecting shaft portion 1c of the pivot shaft 1 is connected to the second friction plate 23,
24, the first friction plates 21 and 22, the bracket 2, the wave spring 6, and the presser plate 7 are penetrated, and by pressing the penetrating end, the wave spring 6 exerts a pressing force.

In this assembled state, the second friction plates 2 and 22 are fixed to the first friction plates 21 and 22 fixed to the bracket 2.
3, 24 are superimposed. In this state, the pivot 1
When the bracket 2 and the bracket 2 are relatively rotated, a friction torque is generated on the contact surfaces of the first friction plates 21 and 22 and the second friction plates 23 and 24. Therefore, the relative angle between the pivot shaft 1 and the bracket 2 can be maintained at an arbitrary angle.

In such an embodiment, a friction torque is generated between the first friction plates 21 and 22 and the second friction plates 23 and 24, and no friction torque acts on the bracket 2. Therefore, a large strength is not required, and the bracket 2 can be made of an inexpensive material. For example,
When the friction plates 21, 22, 23, and 24 are made of stainless steel or phosphor bronze, the bracket 2 can be made of SPCC or the like, and can be provided at low cost.

In this embodiment, the first friction plate 2
Since the first and second friction plates 23 and 24 are flat, these friction plates can be in close contact with each other. Therefore, the lubricant holding portions 29 provided on the first friction plates 21 and 22 can be reliably covered by the second friction plates 23 and 24, and the lubricant does not leak from the lubricant holding portions 29. In addition, the first friction plate 2 where friction torque is generated
Foreign matter does not enter between the first and second friction plates 23 and 24 and the tilt angle can be adjusted without causing rotation failure.

The present invention is not limited to the above embodiments, but can be appropriately modified. For example, it is also possible to form an external thread at the end of the connecting shaft portion 1c of the pivot shaft 1, and screw the nuts together to assemble. Thereby, troublesome caulking becomes unnecessary. Further, a compression spring may be used as the elastic pressure member.

[0062]

According to the first aspect of the present invention, the lubricant is supplied from the lubricant holding portion during the relative rotation of the rotating member and the friction plate, so that the friction torque can be stabilized and the leakage can be prevented. Since the means prevents the lubricant from leaking from the lubricant holding portion, the action of stabilizing the friction torque by the lubricant can be continued, and furthermore, the foreign matter does not enter and the foreign matter can be prevented from being caught. it can.

According to the second aspect of the present invention, since the flat surface of the lubricant holding plate is in close contact with the friction plate provided with the lubricant holding portion, it is possible to prevent leakage of the lubricant and to prevent foreign matter from entering. be able to.

According to the third aspect of the present invention, since the contact surface of the flat elastic pressing member is in close contact with the friction plate, it is possible to prevent the lubricant from leaking from the friction plate and to prevent foreign matter from entering. can do.

According to the fourth aspect of the present invention, since the flat contact surface of the friction plate is in close contact with the member to be rotated, it is possible to prevent leakage of the lubricant from the member to be rotated and to prevent foreign matter from entering. Can be prevented.

According to the fifth aspect of the present invention, since the lubricant holding portion is a through hole, a large amount of lubricant can be secured, and a stable friction torque can be maintained for a long period of time. Can be.

According to the sixth aspect of the present invention, since a plurality of elastic pressure members are provided and the amount of deflection of the entire elastic pressure member is large, the friction torque can be adjusted over a wide range.

According to the seventh aspect of the present invention, since the friction torque of the first friction plate and the second friction plate acts and does not act on the rotated member, the strength of the rotated member is considered. There is no need, and the material of the rotated member can be arbitrarily selected.

According to the eighth aspect of the present invention, since the flat second friction plate is in close contact with the first friction plate, leakage of the lubricant from the lubricant holding portion is prevented, and the first and second friction plates are prevented from leaking. Second
No foreign matter enters between the friction plates.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of Embodiment 1 of the present invention.

FIG. 2 is a front view of the assembled state of the first embodiment.

FIG. 3 is an exploded perspective view of the second embodiment.

FIG. 4 is an exploded perspective view of the third embodiment.

FIG. 5 is an exploded perspective view of a modification of the third embodiment.

FIG. 6 is an exploded perspective view of the fourth embodiment.

FIG. 7 is a front view of an assembled state according to a fourth embodiment.

FIG. 8 is an exploded perspective view of a conventional shaft lock device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pivot shaft 2 Bracket 3 4 Friction plate 5 Lubricant holding plate 6 Wave spring 8 9 Lubricant holding part

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Eiji Wataya 1170-3, Ako, Ako, Komagane-city, Nagano Prefecture Within (72) Inventor Hiroshi Ikeda 1170-3, Ako, Ako, Komagane-shi, Nagano Prefecture, Japan (72) Inventor Naohiko Otake 1170-3, Ako, Komagane-shi, Nagano F-term (reference) 3J105 AA03 AB23 AB31 AC07 AC10 BB03 BB07 BB22 BC31

Claims (8)

[Claims] A rotating member through which the pivot shaft penetrates in a state in which the pivot shaft can rotate relative to the pivot shaft;
A flat plate-like friction plate provided on at least both sides of the pivoted member and superimposed on the pivoted member; and the pivot shaft penetrates, and the friction plate and the pivoted member are superposed. An elastic pressing member for maintaining a relative angle between the pivot shaft and the member to be rotated at an arbitrary angle by applying pressure, and supplying a lubricant to an overlapping portion of the member to be rotated and the friction plate A lubricant holding part is provided on the member to be rotated and / or the friction plate, and a leakage preventing means for preventing leakage of the lubricant in close contact with the lubricant holding part is provided. Axis locking device. 2. The device according to claim 1, wherein the lubricant holding portion is provided on the friction plate, and the leakage preventing means is a lubricant holding plate having a flat surface that is in close contact with the friction plate. Axis locking device. 3. The friction holding plate is provided on the friction plate, the elastic pressing member is overlapped on the friction plate, and the leakage prevention means has a flat surface facing the friction plate. The shaft lock device according to claim 1, wherein the shaft lock device is a contact surface of the elastic pressure member. 4. The rotating member is provided on the rotatable member, and the leakage preventing means is a contact surface of a friction plate having a flat surface facing the rotatable member. The shaft lock device according to claim 1, wherein 5. The shaft lock device according to claim 1, wherein the lubricant holding portion is a through hole that penetrates a rotating member and / or a friction plate. 6. A friction plate is provided on both sides of a member to be rotated so as to overlap from both sides of the member to be rotated, and the elastic pressing member is provided on the member to be rotated of each friction plate. The shaft lock device according to any one of claims 1 to 5, wherein a plurality is provided so as to pressurize the shaft lock. 7. A rotatable member through which the pivot shaft penetrates in a rotatable state with respect to the pivot shaft, a first friction plate fixed on both sides of the rotatable member in an overlapping state, While the pivot is penetrated in a state where is restrained,
A second friction plate superimposed on the first friction plate, the pivot shaft being penetrated, and being pressurized against the superimposed state of the first friction plate and the second friction plate, An axis lock device comprising: an elastic pressing member that holds a relative angle between a support shaft and a rotated member at an arbitrary angle. 8. A lubricant holding portion filled with a lubricant is provided on a first friction plate in a portion where the first friction plate overlaps with the second friction plate, and the first friction plate and a second friction plate are provided. The shaft lock device according to claim 7, wherein the friction plates are formed in a flat plate shape, and the friction plates are in close contact with each other.