JP4055759B2 - Rotation shaft rotation restricting device - Google Patents

Description

  The present invention relates to a rotation restriction device for a rotation shaft configured to restrict or release the rotation of the rotation shaft.

  Conventionally, as a rotation restricting device for this type of rotating shaft, two coil springs are wound around the outer periphery of the rotating shaft adjacent to each other in the axial direction, and the extension end portions adjacent to or separated from the coil springs are horizontally disposed. Locking the frame to hold the rotating shaft in a non-rotatable manner, and pressing the open angle formed between the two movable ends at both ends of the coil springs, depending on the winding direction combination. There is provided a rotation shaft rotation restricting device that releases or deregulates the rotation shaft by increasing or decreasing the inner diameter of both coil springs by approaching or moving away from the urging force of both coil springs by operating the means. It is known (see Patent Document 1).

  Specifically, two coil springs whose inner diameter is smaller than the outer diameter of the rotating shaft and whose winding direction is the same or opposite to each other are adjacent to the axial direction of the rotating shaft. The ends of the coil springs fitted in the same winding direction and separated in the axial direction of the coil spring are locked to the upper frame, or the coil springs in the opposite winding direction are separated from both coil springs in the axial direction. And end portions adjacent to both coil springs are locked to the upper frame.

  When coil springs in the same winding direction are combined, each adjacent movable end portion extends through a rectangular opening of the lower frame bent vertically downward, and each is opened in the vertical direction. A pair of pressing plates locked up and down on both side edges of the square opening are pressed and urged up and down by both movable end portions and held at a predetermined opening angle.

  On the other hand, when both coil springs in the opposite winding direction are combined, each movable end adjacent to each coil spring and each separated movable end are inserted through the opening and opened in the vertical direction by the urging force. A pair of pressing plates locked on the upper and lower side edges of the opening is pressed outward and held at a predetermined opening angle.

  Therefore, both coil springs in the same winding direction and in the opposite winding direction are connected with the lower end of the outer pipe on the upper surface of the pressing plate locked to the upper part on both sides of the opening, and the wire inside the outer pipe. Is connected to the lower pressing plate facing through the upper pressing plate, and by pulling this wire into the outer pipe through the pressing plate, the movable end portions are approached, and the inner diameters of both coil springs Is enlarged so that the rotation shaft can be rotated.

  As described above, the rotation restricting device for the rotation shaft is provided with two movable end portions other than the two end portions locked to the frame among the end portions extending from the four positions on both ends of the coil springs. There is used a pressing means that restricts or cancels the rotation of the rotating shaft by approaching or moving away from the force.

  This pressing means is adapted to approach or separate a pair of pressing plates, which are locked at both upper and lower edges of the opening of the frame by the biasing forces of the two movable end portions and maintained at a predetermined opening angle, against the biasing force. In addition, the lower end of the outer pipe is connected to the upper surface of the upper pressing plate, and the wire inside the outer pipe is connected to the lower pressing plate that passes through the upper pressing plate and is opposed to each other, and the outer pipe and the wire are connected on the same axis. It is configured to operate.

JP-A-6-6734 (paragraphs 0020 to 0025, paragraphs 0031 to 0035 and FIGS. 1, 2, and 5)

  However, since this type of pressing means uses the traction force of the wire in any case where the rotation is restricted or released, the inner diameters of both coil springs are increased by separating the two movable ends from each other. When doing so, since the two wires are individually connected to the back surfaces of the upper and lower pressing plates in the opposite direction, there is a problem that the operation of pulling in the opposite direction at the same time becomes complicated.

  In addition, in a state where the two end portions of both coil springs are locked to the frame, both movable end portions have a predetermined urging force directed outward, so that both movable end portions are locked to the opening. There is a problem in that the work of assembling by making contact with a pair of pressing plates is complicated, and the work of setting an appropriate opening angle becomes difficult.

  The present invention has been made paying attention to such problems, and by rotating or reducing the inner diameters of a pair of coil springs by a simple linear movement or turning action of a pressing member having a simple structure, the rotation is reduced. It is an object of the present invention to provide a rotation shaft rotation restricting device that simplifies the assembling work of the pressing member, as well as being able to reliably perform the rotation restriction or deregulation of the moving shaft.

In order to solve the above-described object, the rotation restricting device for the rotation shaft according to claim 1 of the present invention is fixed to one of the two members and is rotatably supported by the other member. A pair of coil springs 72 and 74 having an inner diameter slightly larger than the outer diameter of the rotating shaft 5 and opposite to each other in the winding direction are inserted and held adjacent to each other on the outer periphery of the rotating shaft 5 connected between them. The two coil springs 72, 74 intersect each other at the winding start end portions 72a, 74a on the outer periphery of the rotating shaft 5 when viewed from the axial end of the rotating shaft 5, and the winding direction extends from the intersecting portion. Both windings are formed by bending in opposite directions and extending in a radial direction so as to be open to each other with respect to the axis of the rotating shaft 5 and attaching winding end portions 72b and 74b to the other member side. Inside the start ends 72a and 74a A pressing member 76 formed in a substantially triangular prism shape so that the corners 78 a, 78 b, 78 c or the sides are inscribed is disposed so as to be rotatable in a direction orthogonal to the rotating shaft 5, and the pressing member 76. When two of the corner portions 78a, 78b, 78c of the pressing member 76 are applied with an external force to expand between the winding start end portions 72a, 74a, the both winding start end portions 72a, 74a. Due to the component force in the same direction as the winding direction of the two coil springs 72 and 74 acting in between, the inner diameters of the two coil springs 72 and 74 are reduced to tighten the outer periphery of the rotating shaft 5, and A rotation restricting device for a rotating shaft, characterized in that the rotation of the moving shaft 5 is restricted.
According to the rotation restricting device for the rotation shaft, when the rotation of the rotation shaft 5 is restricted, the pressing member 76 is predetermined in a direction orthogonal to the rotation shaft 5 by the rotation operation of the pressing member 76. The inner side between the winding start end portions 72a and 74a intersecting each other is simultaneously pressed outward by two of the corner portions 78a, 78b, and 78c of the pressing member 76 by rotating the angle, and both winding starts. A component force in the same direction as the winding direction of the coil springs 72, 74 acts on the end portions 72a, 74a, the inner diameters of the coil springs 72, 74 are reduced, and the rotation of the rotating shaft 5 is prevented. .

According to a second aspect of the present invention, there is provided a rotation shaft rotation restricting device which is fixed to one of the two members and is rotatably supported by the other member to connect the rotation shafts 5 to each other. A pair of coil springs 62 and 64, whose inner diameter is slightly smaller than the outer diameter of the rotating shaft 5 and whose winding directions are opposite to each other, are inserted and held adjacent to each other on the outer periphery. When viewed from the axial end of the moving shaft 5, the winding start ends 62 a and 64 a are bent in the direction opposite to the winding direction from the adjacent positions separated from each other on the outer periphery of the rotating shaft 5. The winding end portions 62b and 64b are attached to the other member side and are extended to each other with respect to the shaft center of the winding, and are formed on the inner side of the winding start end portions 62a and 64a spaced apart from each other. Part 78a, 78b, 7 c or a pressing member 76 formed in a substantially triangular prismatic shape so that the side part is inscribed is disposed so as to be rotatable in a direction orthogonal to the rotating shaft 5, and by rotating the pressing member 76, When two of the corners 78a, 78b, 78c of the pressing member 76 apply an external force that expands between the winding start ends 62a, 64a, the two acting on both winding start ends 62a, 64a. Due to the component force in the direction opposite to the winding direction of the coil springs 62, 64, the inner diameters of both the coil springs 62, 64 are increased and the tightening of the outer periphery of the rotating shaft 5 is loosened. A rotation restricting device for a rotating shaft, wherein the restriction is released.
According to the rotation restricting device for the rotation shaft, when the rotation of the rotation shaft 5 is restricted, the pressing member 76 is rotated in the direction orthogonal to the rotation shaft 5 by the rotation operation of the pressing member 76. Two winding start end portions are rotated by a predetermined angle and the inner sides of both winding start end portions 62a and 64a are simultaneously pressed outward by two of the corner portions 78a, 78b and 78c of the pressing member 76. The inner diameters of the coil springs 62 and 64 are expanded by the component force acting in the direction opposite to the winding direction of the coil springs 62 and 64 acting between the coil springs 62a and 64a, and the rotation restriction of the rotating shaft 5 is released. The

  The present invention has the following effects.

  According to the first aspect of the present invention, the winding start end formed by bending in the direction opposite to the winding direction from the angular position intersected at the outer periphery of the rotating shaft and extending in the radial direction of the rotating shaft. Since the pressing member formed in a substantially triangular prismatic shape is disposed between the parts, the assembly work can be greatly simplified, and the pressing member disposed between the winding start ends. Is simply rotated in a direction orthogonal to the rotation shaft, and the inner side between both winding start ends is pressed outward by two of the corners of the pressing member. The inner diameter of the coil spring can be reduced to restrict the rotation of the rotating shaft.

  According to the second aspect of the present invention, between the winding start end portions that are bent in the opposite direction to the winding direction from substantially the same angular position on the outer periphery of the rotating shaft and opened in the circumferential direction, Since the simple structure is provided with a pressing member formed in the shape of a prism, the assembling work can be greatly simplified, and the pressing member disposed between the winding start ends is orthogonal to the rotating shaft. The inside of both winding start ends is pressed outward by two of the corners of the pressing member, and the inner diameters of both coil springs are expanded by simple rotation positioning operation that only rotates in the direction of rotation. Thus, the rotation restriction of the rotation shaft can be released.

  Examples of the present invention will be described below. First, the rotation restricting device for a rotation shaft according to the present invention is a form of a pair of coil springs used therein, and each winding start end portion is in the winding direction from substantially the same angular position on the outer periphery of the rotation shaft 5. Bending in the opposite direction and extending in the direction of opening in the circumferential direction, and from the angular position where the winding start end intersects with the outer periphery of the rotating shaft 5, bent in the direction opposite to the winding direction, respectively. The rotating shaft 5 is configured to extend in the radial direction.

  The two coil springs have an inner diameter larger than the outer diameter of the rotating shaft 5 and hold the rotating shaft 5 so that the rotating shaft 5 can rotate, and an inner diameter smaller than the outer diameter of the rotating shaft 5. Both coil springs are inserted and held adjacent to the outer periphery of the rotating shaft 5 so that the winding directions are opposite.

  The rotation regulating device for a rotation shaft according to the present invention is a rotation shaft that can be rotated by opening between the winding start end portions of both coil springs to the outside or reducing them to the inside by pressing members of various forms described below. 5 is configured by a pressing member in a form that restricts the rotation of the rotation shaft 5 or cancels the rotation restriction of the rotation shaft 5 in which the rotation is restricted.

  More specifically, FIGS. 1A and 1B are diagrams illustrating the principle of a rotation restricting device for a rotating shaft, and FIGS. 2A and 2B are rotation restricting devices for a rotating shaft. 3A and 3B are partial side sectional views showing the structure of the rotation restricting device for the rotation shaft, and FIGS. 4A and 4B are rotation directions. It is sectional drawing which concerns on the rotation control apparatus of a shaft.

  First, the rotation regulating device 1 for the rotation shaft is such that the rotation shaft 5 whose rotation is restricted is released by a pressing member, as shown in FIGS. 1 and 2 (A) and (B). As shown in the figure, a pair of coil springs 2 and 4 which are tightened in close contact with the outer periphery of the rotating shaft 5 and disposed adjacent to each other in the axial direction are formed by these coil springs 2 and 4. The coil springs 2, 4 a are moved straightly between the winding start ends 2 a, 4 a that are opened in the circumferential direction and the inner side between the winding start ends 2 a, 4 a is pressed outwardly, and the inner diameters of both coil springs 2, 4 are expanded It is comprised from the pressing member 8 to do.

  Specifically, both the coil springs 2 and 4 are formed so that the inner diameter is slightly smaller than the outer diameter of the rotating shaft 5 with respect to the outer periphery of the rotating shaft 5, and one coil spring 2 rotates around the winding start end portion 2a. The end portion 2b of the winding is attached to the locking portion 6 on the other member side by extending in the radial direction of the moving shaft 5, and the other coil spring 4 has the winding start end portion 4a at the diameter of the rotating shaft 5. The end portion 4b of the winding is attached to the locking portion 6 on the other member side.

  The pair of coil springs 2 and 4 are adjacent to each other in the axial direction of the rotating shaft 5 as shown in FIG. Directional tightening force acts and its rotation is restricted.

  As shown in FIG. 1B, the coil springs 2 and 4 have their winding start ends 2a and 4a separated from each other in the axial direction, but are horizontally long wedge members straddling the winding start ends 2a and 4a. Can be used to simultaneously apply a component force that opens outwardly between the winding start ends 2a and 4a.

  These two winding start end portions 2a and 4a are bent from the same angular position on the outer periphery of the rotating shaft 5 so as to be inclined in the direction toward the anti-winding direction, so that they are viewed from the end side of the rotating shaft 5. A substantially V-shaped angle opening in the circumferential direction is formed.

  Next, the pressing member 8 has a rectangular cross section as shown in FIGS. 2 to 4, and both sides of an isosceles triangle having a wider angle than the angles of the winding start end portions 2 a and 4 a on the two front and rear surfaces at the tip. A surface is formed, and both inclined surfaces are configured as a wedge member 10 that moves straight toward the center between the winding start ends 2a and 4a.

  As shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the wedge member 10 is an axis passing through the center of the rotating shaft 5 and the center between the winding start ends 2a and 4a. It is arranged on a line and is locked to a tension coil spring 16 that is locked to the upper end of the case body 14, and is elastically moved to a position near the winding start end portions 2 a and 4 a by the urging force of the tension coil spring 16. Is held.

  Specifically, in this wedge member 10, a pair of guide pins 10a and 10b are provided on the opposite opposing side surfaces where no inclined surface is formed, and the guide pins 10a and 10b are connected to the other member. The case body 14 is inserted into and supported by a pair of long holes 12a and 12b that are formed so as to penetrate the center of both side surfaces along the longitudinal direction.

  Accordingly, as shown in FIGS. 2 (A) and 3 (A), the wedge member 10 is linearly moved toward the winding start end portions 2a and 4a, whereby the winding start end is formed by both inclined surfaces formed at the tip. The inner sides of the portions 2a and 4a are simultaneously pressed, and a component force acts on the winding start ends 2a and 4a in the direction opposite to the winding direction of the coil springs 2 and 4, so that the coil springs 2 and 4 expand. The tightening force on the rotating shaft 5 is released by being deformed in the direction.

  Further, as shown in FIG. 3B, the winding start ends 2a and 4a are moved backward in the direction in which the wedge member 10 is separated from both winding start ends 2a and 4a by the urging force of the tension coil spring 16. Thus, the original position is automatically restored by the return elasticity of the pair of coil springs 2 and 4 themselves.

  Next, the operation of the rotation restriction device for the rotation shaft will be described in detail with reference to FIGS. 4 (A) and 4 (B).

  As shown in FIG. 4 (A), the rotating shaft 5 in which two members are rotatably connected is rotated by a pair of coil springs 2 and 4 that are held in close contact with each other on the outer periphery. It is in a regulated state.

  Therefore, when releasing the rotation restriction of the rotation shaft 5, the wedge member 10 is pressed by the wedge member 10 as shown in FIG. 4B, so that the guide member 10a, 10b has a pair of long holes 12a. , 12b, and is linearly moved toward the winding start ends 2a, 4a of the coil springs 2, 4 against the urging force of the tension coil spring 16.

  Due to the linear movement of the wedge member 10, the inner sides of the winding start ends 2a, 4a are simultaneously pressed by both inclined surfaces of the tip, and the winding start ends 2a, 4a are opposite to the winding direction of the coil springs 2, 4. A component force acts on the two and the inner diameters of the coil springs 2 and 4 are increased, whereby the tightening force on the rotating shaft 5 is released.

  Therefore, according to the rotation restricting device for the rotation shaft configured as described above, the pressing member 8 having a simple configuration with the wedge-shaped tip is located near the winding start end portions 2a and 4a. Assembling work can be greatly simplified by arranging it so that it can move straight.

  Further, the pressing member 8 is simply moved linearly toward the center between the winding start ends 2a and 4a on the axis passing through the center of the rotation shaft 5 and the center between the winding start ends 2a and 4a. With a simple pressing operation, the inner sides of the winding start ends 2a, 4a are pressed outward by the outer slopes of the wedges, and the inner diameters of the coil springs 2, 4 are expanded, so that the rotation of the rotating shaft 5 is restricted. It can be canceled.

  Further, in the wedge member 10, the pressing force of both inclined surfaces of the isosceles triangle acting on the inner side of the two winding start ends 2a and 4a by linear movement is opposite to the winding direction of the two coil springs 2 and 4 as a wedge action. Since it acts simultaneously and equally as a component force in the direction, a stable release force can be applied.

  Since the wedge member 10 is released from the pressing force, the wedge member 10 is moved backward from the winding start end portions 2a and 4a by the urging force of the tension coil spring 16 and held in the separated position, so that an erroneous operation at the time of release is avoided. can do.

  Next, as an example of use of the rotation restricting device of the present invention, the rotation restricting device will be described with reference to FIG. 5 as an example in which the rotation restricting device is attached to a rotating shaft that connects between a stand of a desk lamp and a swing arm. To do.

  FIG. 5 is a side view of the desk lamp showing a partial cross section in which the rotation restricting device is incorporated in the arm. A desk lamp indicated by reference numeral 20 is swingable via a rotating shaft 5 at a top 25 of a stand 25 which is one member standing up via a fixing bracket 24 fixed to an end of the desk 22 and an upper end of the stand 25. The swinging arm 26 is a hollow swinging arm 26 which is the other member pivotally attached to the lighting member 30, and the illuminating tool 30 which is pivotally fixed to the upper end of the swinging arm 26.

  A rotation restricting device 1 is attached to a rotation shaft 5 pivotally attached to the stand 25 and the swing arm 26 so that the rotation restricting device 1 is wound around the outer periphery of the rotation shaft 5. The rotation of the rotating shaft 5 is restricted by a pair of coil springs 2 and 4 tightened in close contact so that the opposite directions are opposite.

  On the other hand, the pressing member 8 is accommodated inside a hollow cylindrical swing arm 26 that is formed in a hollow shape, and is wound by a pair of coil springs 2 and 4 that are tightened in close contact with the outer periphery of the rotating shaft 5. The wedge member 10 is suspended and held by the tension coil spring 16 in the vicinity of the start end portions 2a and 4a at a position away from the winding start end portions 2a and 4a.

  Therefore, when the swing arm 26 is swung up and down, the wedge member 10 is manually operated by the pair of guide pins 10a and 10b against the urging force of the compression spring 16, and the center between the winding start end portions 2a and 4a. Move straight toward.

  As a result, the winding start end portions 2a and 4a are simultaneously displaced outward by the component force generated inside the winding start end portions 2a and 4a by the pressing action of both inclined surfaces at the tip of the wedge member 10, and both coil springs 2 , 4 acts simultaneously with the external force in the direction opposite to the winding direction, so that the tightening force on the rotating shaft 5 is released.

  On the other hand, when restricting the swing of the swing arm 26, the wedge member 10 starts to be wound by the urging force of the tension coil spring 16 by releasing the pressing force from the wedge member 10 that has been pressed manually until now. It is held at a position in the vicinity of being separated by moving backward in the range of the long holes 12a and 12b from between the ends 2a and 4a.

  Next, as another example of use of the rotation restricting device, the rotation restricting device for the rotation shaft of the present invention is attached to a rotation shaft that pivotally supports a keyboard device and a display device of a notebook computer. An example will be described with reference to FIGS.

  FIG. 6 is a front view showing a partial cross section of a notebook personal computer in which a rotation restricting device is incorporated in a part of the rotation shaft, and FIG. 7 is an example in which the rotation restricting device is incorporated in a part of the rotation shaft. It is a side view which shows the partial cross section of the notebook computer of a notebook computer.

  Reference numeral 32 denotes a notebook type personal computer. The personal computer 32 is pivotally supported at both ends of a keyboard device 34 which is one member for performing input / output operations, and a rotary shaft 5 fixed to the keyboard device 34. The other CRT device 35 is the other member.

  A rotation regulating device 1 is attached to one end of a rotation shaft 5 that is pivotally supported by the CRT device 35, and a pair of winding directions opposite to each other on the outer periphery of the rotation shaft 5. The coil springs 2 and 4 are tightened in close contact, and the terminal portions 2′b and 4′b of both windings extending in the diameter direction of the rotating shaft 5 are locked to the CRT device 35 serving as the other member. Thus, the rotation of the rotation shaft 5 is restricted.

  A wedge member 10 serving as a pressing member 8 is accommodated in a space on one side of the CRT device 35 configured in a casing shape, and the wedge member 10 is a double-coil spring wound around the outer periphery of the rotating shaft 5. It is held so as to be linearly movable on the axis line between the winding start ends 2a and 4a of the second and fourth windings.

  Further, the wedge member 10 is configured to be pressed by an operation shaft 40 inserted and held at the upper end of the CRT device 35. Normally, the wedge member 10 is wound from the end portions 2a and 4a by the compression spring 16 '. It is held at a position near the distance.

  Therefore, when the CRT device 35 is opened and closed, the wedge member 10 is moved linearly toward the center between the winding start ends 2a and 4a against the urging force of the compression spring 16 'by the manual pressing operation of the operation portion 38. .

  As a result, the winding start end portions 2a and 4a are simultaneously displaced outward by the component force generated inside the winding start end portions 2a and 4a by the pressing action of both inclined surfaces at the tip of the wedge member 10, and both coil springs 2 , 4 simultaneously with the external force in the direction opposite to the winding direction, and the tightening force on the rotating shaft 5 is released.

  On the other hand, when restricting the swing of the CRT device 35, the wedge member 10 is guided to the operation shaft 40 by the urging force of the compression spring 16 ′ by releasing the hand from the operation unit 38 that has been pressed manually. Then, it moves backward within the range of the long holes 12a and 12b and is held at a position near the winding start end 2a and 4a.

  Next, as another example of use of the rotation restricting device, FIG. 8 shows an example in which the rotation restricting device for the rotation shaft of the present invention is attached to the rotation shaft of the window frame that pivotally supports the window. This will be described with reference to FIG.

  FIG. 8 is a front view of the window showing a partial cross section in which a rotation restricting device is incorporated in a rotation shaft of a window frame that pivotally supports the window, and FIG. 9 is a rotation restriction in the internal space of the window. It is AA sectional drawing of FIG. 8 which shows the state which incorporated the apparatus.

  Reference numeral 44 denotes a window frame, and a window 42 provided in the window frame 44 so as to be openable and closable is pivotally supported at three positions on a rotating shaft 5 fixed to the window frame 44. The rotation restricting device 1 is attached to an intermediate portion of the rotation shaft 5 that pivotally supports the window 42.

  In the rotation restricting device 1, a pair of coil springs 2 and 4 whose winding directions are opposite to each other are tightened adjacent to each other on the outer periphery of the rotation shaft 5, and both of them extend in the diameter direction of the rotation shaft 5. The terminal portions 2'b and 4'b of the winding are configured to be inserted and locked inside the window 42 serving as the other member to restrict the rotation of the rotating shaft 5.

  A wedge member 10 serving as a pressing member 8 is accommodated in a hollow portion of a horizontal frame 45 provided in the middle of the window 42, and the wedge member 10 is a double-coil spring wound around the outer periphery of the rotating shaft 5. It is held so as to be able to move straight on the axis toward the winding start ends 2a, 4a of the second and fourth windings.

  Further, the wedge member 10 is connected to an operation shaft 40 ′ inserted through a support member 46 disposed in the hollow portion of the horizontal frame 45, and the operation shaft 40 ′ is wound by a compression spring 48 at the winding start end portion 2 a, It is biased and held outward at a position near the 4a.

  An operation lever 50 is disposed on the outer side of the intermediate portion of the window 42. The operation lever 50 has a support shaft 52 pivotally supported so as to face an internal space communicating with the hollow portion of the horizontal frame 45. An arc-shaped pressing lever 54 is fixed to one end of the support shaft 52, and the tip of the operating shaft 40 'is biased by a compression spring 48 to the arc portion of the pressing lever 54. In contact.

  Therefore, when opening and closing the window 42, the tip of the operation shaft 40 ′ is turned into the arc portion of the pressure lever 54 by rotating the pressure lever 54 counterclockwise through the support shaft 52 by manual operation of the operation lever 50. The wedge member 10 is linearly moved toward the center between the winding start ends 2a and 4a against the urging force of the compression spring 48.

  As a result, the winding start end portions 2a and 4a are simultaneously displaced outward by the component force generated inside the winding start end portions 2a and 4a by the pressing action of both inclined surfaces at the tip of the wedge member 10, and both coil springs 2 , 4 simultaneously with the external force in the direction opposite to the winding direction, and the tightening force on the rotating shaft 5 is released.

  On the other hand, when restricting the opening and closing of the window 42, the wedge member 10 is moved to the original position of the compression spring 48 by returning the operation lever 50, which has been rotated counterclockwise until now, to the original position by rotating clockwise. Due to the urging force, it moves backward within the range of the long holes 12a and 12b via the operation shaft 40 ', and is held at a position near the winding start ends 2a and 4a.

  Next, FIG. 10 is a cross-sectional view showing a support structure in which one end of the rotating shaft 5 is attached to the main body side via a friction collar, and one end of the rotating shaft 5 is on the main body side as shown in FIG. 56 (corresponding to the stand 25 in the example of the table lamp in FIG. 5, the keyboard device 34 in the example of the notebook computer in FIG. 6 and the window frame 44 in the example of the window in FIG. 8) via the friction collar 55. It has been.

  The friction collar 55 is formed of a high friction material in a cylindrical shape. One end of the rotating shaft 5 is pivotally supported on the main body 56 via the friction collar 55, so that a pair of coil springs 2, 4 is provided. When the rotary shaft 5 is tightened, the other side surface 57 (corresponding to the swing arm 26 in the example of FIG. 5, the display device 36 in the example of FIG. 6, and the window 42 in the example of FIG. 8). If the rotating shaft 5 is inadvertently rotated by the action of an excessive load, the rotating shaft 5 is rotated through the frictional force of the friction collar 55, so that the rotating shaft 5, the main body 56, and the surroundings are damaged. Can be prevented.

  Next, a description will be given with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same component as the said Example, and the overlapping description is abbreviate | omitted.

  First, the rotation restricting device for the rotation shaft is denoted by reference numeral 11. The rotation restricting device 11 for the rotation shaft rotates the rotation shaft 5 that is rotatably held by a pressing member. As shown in FIGS. 11A and 11B, the winding shaft is loosely wound around the outer periphery of the rotating shaft 5 and arranged adjacent to the axial direction, and the winding direction is opposite. A pair of coil springs 62 and 64, and the inner sides between the winding start ends 62a and 64a by moving straightly between the winding start ends 62a and 64a opened in the circumferential direction formed by the coil springs 62 and 64. And a pressing member 8 'that reduces the inner diameter of the coil springs 62 and 64.

  The pair of coil springs 62 and 64 used for the rotation shaft 5 as the rotation restriction device 11 are formed so that the inner diameter is slightly larger than the outer diameter of the rotation shaft 5 and the winding directions are opposite to each other. Adjacent, it is wound loosely around the outer periphery of the rotating shaft 5.

  The coil springs 62 and 64 extend the winding start end portions 62a and 64a in the radial direction of the rotating shaft 5 and attach the winding end portions 62b and 64b to the locking portion 6 of the other member. The winding start ends 62a and 64a of the pair of coil springs 62 and 64 are bent in the direction opposite to the winding direction from substantially the same angular position on the outer periphery of the rotating shaft 5 to form an angle that opens in the circumferential direction. ing.

  The pressing member 8 ′ used in the second embodiment has a rectangular cross section, and a V groove G is formed at the tip as shown in FIGS. 11A and 11B. Is configured as a V-groove member 10 'that moves straight toward the center between the winding start ends 62a and 64a.

  The V-groove member 10 'has a pair of guide pins 10'a and 10'b provided on both sides so as to protrude on the same axis. The guide pins 10'a and 10'b are formed in, for example, the case shown in FIG. The body 14 is inserted into and supported by a pair of long holes 12a and 12b that are formed through the center of both side surfaces in a straight line direction.

  Therefore, when the rotation shaft 5 is restricted, the V-groove member 10 ′ having the V-groove G formed at the tip is placed on the axis passing through the center of the rotation shaft 5 and the center between the winding start ends 62 a and 64 a. The linear movement toward the winding start ends 62a and 64a causes the outer sides of both winding start ends 62a and 64a to be pressed inward by the inner slopes of the V-groove, and the windings of both coil springs 62 and 64 are wound. The inner diameters of the coil springs 2 and 4 are reduced by the component force of both winding start ends 62a and 64a acting in the same direction as the direction, and the rotation of the rotating shaft 5 is prevented.

  Therefore, according to the rotation restricting device for the rotation shaft configured as described above, the pressing member 8 ′ having a simple configuration in which the V groove G is formed at the tip is separated from the winding start end portions 62a and 64a. Assembling work can be greatly simplified by disposing it so that it can move straight in the vicinity.

  Further, only by moving the pressing member 8 ′ straightly on an axis passing through the center of the rotating shaft 5 and the center between the winding start ends 62a and 64a, the outer sides of both winding start ends 62a and 64a are formed by the V-groove G. Since the inner diameter of both the coil springs 62 and 64 is reduced by being pressed inward, the rotation of the rotating shaft can be restricted.

  Next, it attaches to the rotation control apparatus of a rotation shaft, and demonstrates with reference to FIG. 12 (A) and (B). In addition, the same code | symbol is attached | subjected to the same component as the said Example, and the overlapping description is abbreviate | omitted.

  The rotation restricting device 21 for the rotation shaft is configured to restrict the rotation of the rotation shaft 5 that is rotatably held by the pressing member as in the second embodiment. As shown in FIGS. 12A and 12B, 8 ″ is different from the above in that it is arranged in parallel with the rotating shaft 5.

  In other words, the rotation restricting device 21 for the rotation shaft includes a pair of coil springs 62 and 64 that are loosely wound around the outer periphery of the rotation shaft 5 and arranged adjacent to each other in the axial direction. The outer sides of the two winding start ends 62a and 64a are moved straight between the winding start ends 62a and 64a opened in the circumferential direction formed by the pair of coil springs 62 and 64 in parallel with the rotating shaft 5. It is composed of a pressing member 8 '' that presses inward on both inner slopes and reduces the inner diameters of both coil springs 62 and 64.

  The pair of coil springs 62 and 64 used for the rotation shaft 5 as the rotation restricting device 21 has an inner diameter slightly larger than the outer diameter of the rotation shaft 5 and is adjacent to each other so that the winding direction is opposite. Thus, it is loosely wound around the outer periphery of the rotating shaft 5.

  The rotating shaft 5 is formed at one end of a large-diameter support shaft 71 that is erected on both ends of the base B and is rotatably supported by a pair of legs H, and is loosely wound around the outer periphery of the rotating shaft 5. The pair of coil springs 62 and 64 to be rotated are restricted from moving in the axial direction by the stepped portion 5a.

  The coil springs 62 and 64 extend the winding start end portions 62a and 64a in the radial direction, and attach the winding end portions 62b and 64b to the other member (base B) side. , 64 are bent in a direction opposite to the winding direction from an angular position adjacent to each other on the plane crossing the rotating shaft 5 to form an angle that opens in the circumferential direction. .

  The pressing member 8 '' used here has a horizontal plate-like cross section, and a V groove G is formed at the tip as shown in FIGS. 12A and 12B, and winding start end portions 62a and 64a are formed. The center of both inclined surfaces of the V-groove G is configured as a V-groove member 10 '' that moves straight toward the center between the winding start end portions 62a and 64a on an axis parallel to the rotating shaft 5 passing through the center between them. ing.

  The V-groove member 10 ″ is integrally formed at the front end of the slide shaft 65 inserted and supported by the holder 65a at the upper end of the stand S standing from the upper surface of one end of the base B. A guide length formed in the axial direction is held in the vicinity of the winding start end 62a, 64a by being urged rearward by a compression spring 66 interposed between the cap 68 and the holder 65a. The guide pin 70 inserted into the hole 65a is guided so as to be movable within the range of the guide long hole 65a.

  Therefore, when the rotation shaft 5 is restricted from rotation, the V groove member 10 '' is wound on the axis parallel to the rotation shaft 5 passing through the center between the winding start ends 62a and 64a. By moving linearly toward 64a, the outer sides of both winding start ends 62a, 64a are pressed inward by both inner inclined surfaces of the V-groove, and act in the same direction as the winding direction of both coil springs 62, 64. Due to the component force of both winding start ends 62a and 64a, the inner diameters of both coil springs 62 and 64 are reduced, and the rotation of the rotating shaft 5 is prevented.

Therefore, according to the rotation restricting device for the rotation shaft configured as described above,
Assembling work can be greatly simplified by disposing a pressing member 8 '' having a simple configuration with a wedge-shaped tip so that it can move straight to a position near the winding start end portions 62a and 64a. Further, the outer side of both winding start ends 62a and 64a can be moved by moving the pressing member 8 '' straight on an axis parallel to the rotation shaft 5 passing through the center between the winding start ends 62a and 64a. The inner diameters of the two coil springs 62 and 64 are reduced by being pressed toward each other, and the rotation of the rotating shaft 5 can be restricted.

  Next, it attaches to the rotation control apparatus of a rotation shaft, and demonstrates with reference to FIG. 13 (A), (B). In addition, the same code | symbol is attached | subjected to the same component as the said Example, and the overlapping description is abbreviate | omitted.

  This rotation shaft rotation restricting device 31 is configured to restrict rotation of a rotation shaft that is rotatably held by a pressing member, and this pressing member 8 is shown in FIG. ), (B), the wedge member 10 is used, and both the coil springs 72, 74 are formed so that the inner diameter is slightly larger than the outer diameter of the rotary shaft 5, and the winding start ends 72a, 74a is bent in the direction opposite to the winding direction from the angular position where the outer periphery of the rotating shaft 5 intersects and extends in the radial direction of the rotating shaft 5, and the end portions 72b and 74b of both windings are provided. It is attached to the locking part 6 on the other member side.

  Therefore, when the rotating shaft 5 is rotated, the pressing member 8 having a wedge-shaped tip is started to be wound on an axis passing through the center of the rotating shaft 5 and the center between the winding start ends 72a and 74a. By moving straight toward the ends 72a and 74a, the inner side between the winding start ends 72a and 74a is pressed outward by the outer slopes of the wedges, and is opposite to the winding direction of the coil springs 72 and 74. The inner diameters of the coil springs 72 and 74 are increased by the component force acting in the direction, and the rotation shaft 5 can be rotated.

Therefore, according to the rotation restricting device for the rotation shaft configured as described above,
Assembling work can be greatly simplified by disposing the pressing member 8 having a simple configuration with the wedge-shaped tip so as to be able to move linearly to a position near the winding start ends 72a and 74a.

  Further, the pressing member 8 is simply moved straight on an axis passing through the center of the rotating shaft 5 and the center between the winding start ends 72a and 74a, and the inner sides of both winding start ends 72a and 74a are both outer slopes of the wedges. , The inner diameters of both the coil springs 72 and 74 are increased, and the rotation restriction of the rotation shaft 5 can be released.

  Next, it attaches to the rotation control apparatus of a rotation shaft, and demonstrates with reference to FIG. 14 (A), (B) and FIG. 15 (A), (B). FIGS. 14A and 14B are explanatory views of the operation of the rotation restricting device for the rotation shaft in this example of the present invention, and FIGS. 15A and 15B are the rotation restriction in this example of the present invention. It is side surface sectional drawing explaining an effect | action of an apparatus. In addition, the same code | symbol is attached | subjected to the same component as the said example, and the overlapping description is abbreviate | omitted.

  The rotation restricting device 41 of the rotation shaft in this example is such that the rotation shaft held so as to be rotatable is restricted by a pressing member, and is shown in FIGS. 13 (A) and 13 (B). Coil springs having the same configuration as the two coil springs 72 and 74 of Example 4 shown are used, and only the configuration of the pressing member is different.

  The pressing member 76 is a triangular cam member 78 formed in a prismatic shape having a substantially equilateral triangular cross section, and the triangular cam member 78 starts to wind both sides as shown in FIGS. 14 (A) and 14 (B). It is arrange | positioned so that rotation in the direction orthogonal to the rotation shaft 5 is carried out inside the circumferential direction formed between the edge parts 72a and 74a.

  Specifically, as shown in FIGS. 15A and 15B, the triangular cam member 78 has a support shaft 80 protruding from both ends of the case 81 that covers the rotating shaft 5 on an axis parallel to the rotating shaft 5. A handle N is attached to one support shaft 80 that is rotatably supported inside and is inserted outside the case 81.

  Therefore, when the rotation of the rotation shaft 5 is restricted, the triangular cam member 78 is orthogonal to the rotation shaft 5 by the rotation operation of the handle N as shown in FIGS. 14 (A) and 15 (A). The inner side between the two winding start end portions 72a and 74a, which are rotated by a predetermined angle in the direction and intersected with each other by the pair of corner portions 78a and 78b of the triangular cam member 78, is simultaneously pressed outward, thereby starting both windings. The inner diameters of the coil springs 72 and 74 are reduced by the component force in the same direction as the winding direction of the coil springs 72 and 74 acting on the ends 72a and 74a, and the rotation of the rotating shaft 5 is prevented.

  Further, when the rotation restriction of the rotation shaft 5 is released, as shown in FIGS. 14B and 15B, one of the corners is turned by the turning operation of the handle N and both winding start ends. By rotating the triangular cam member 78 to an angular position facing the center of 72a, 74a, the inner diameter of both coil springs 72, 74 is restored to its original state slightly larger than the outer diameter of the rotating shaft 5 by its own return elasticity. Then, the rotation restriction of the rotation shaft 5 is released.

  Therefore, according to the rotation restricting device for the rotation shaft configured as described above, the rotation shaft 5 is bent from the angular position intersected on the outer periphery of the rotation shaft 5 in the direction opposite to the winding direction. Since the triangular cam-like pressing member 76 is disposed between the winding start end portions 72a and 74a formed by extending in the radial direction, the assembling operation can be greatly simplified.

  Further, both the winding start ends can be obtained by a simple rotation positioning operation in which the triangular cam-shaped pressing member 76 disposed between the winding start end portions 72a and 74a is rotated in a direction orthogonal to the rotation shaft 5. The inner side between the portions 72a and 74a is pressed outward by the two corner portions 78a and 78b of the triangular cam member 78 to reduce the inner diameters of the coil springs 72 and 74, thereby preventing the rotation of the rotating shaft 5. .

  Next, it attaches to the rotation control apparatus of a rotation shaft, and demonstrates with reference to FIG.

  The rotation restricting device 51 for the rotation shaft in this example is such that the rotation shaft whose rotation is restricted is released by a pressing member, and Example 4 shown in FIGS. 13 (A) and 13 (B). The coil springs 72 and 74 having the same configuration are used except that the inner diameters of both the coil springs 72 and 74 and the coil spring are smaller than the outer diameter of the rotating shaft 5, and only the configuration of the pressing member is different. is doing.

  The pressing member 8 ′ uses a V-groove member 10 ′ having the same configuration as the pressing member shown in FIGS. 11A and 11B, although the overlapping description is omitted, and a V-groove G formed at the tip. The centers of the two inclined surfaces are configured to move straight toward the center between the winding start ends 72a and 74a.

  Therefore, when releasing the rotation restriction of the rotation shaft 5, the V-groove member 10 ′ having the V-groove G formed at the tip passes through the center of the rotation shaft 5 and the center between the winding start ends 72a and 74a. By moving linearly toward the winding start ends 72a and 74a on the axis, the outer sides of both winding start ends 72a and 74a are pressed inward by the inner slopes of the V-grooves, and the coil springs 72 and 74 The inner diameters of the coil springs 72 and 74 are expanded by the component force of both winding start ends 72a and 74a acting in the same direction as the winding direction, and the rotation restriction of the rotating shaft 5 is released.

  Therefore, according to the rotation restricting device for the rotation shaft in the fifth embodiment configured as described above, the V groove member 10 ′ having a simple configuration in which the V groove is formed at the tip is provided with the winding start end portions 72 a and 74 a. Assembling work can be greatly simplified by disposing it so as to be able to move straight ahead in the vicinity of the position away from the center.

  Further, the winding start end formed by bending the V groove member 10 ′ from the angular position intersecting the outer periphery of the rotating shaft 5 in the direction opposite to the winding direction and extending in the radial direction of the rotating shaft 5. By simply moving straight toward the portions 72a and 74a, the outer sides of the two winding start ends 72a and 74a are pressed inward by the V-grooves, the inner diameters of both the coil springs 72 and 74 are expanded, and the rotating shaft 5 Can be released.

  Next, it attaches to the rotation control apparatus of a rotation shaft, and demonstrates with reference to FIG. 17 (A), (B).

  The rotation restricting device 61 of the rotation shaft in this example is such that the rotation shaft whose rotation is restricted is released by a pressing member, and has the same configuration as the two coil springs 2 and 4 of the first embodiment. A coil spring is used, and only the configuration of the pressing member is different.

  Since the pressing member used here is a cam member having the same configuration as the triangular cam member 78 described above, the same reference numerals are assigned and the overlapping description is omitted, but the two coil springs used are described above. Since the configuration is different from the example, the reverse operation is performed.

  That is, when releasing the rotation restriction of the rotation shaft 5, as shown in FIG. 17A, the triangular cam member 78 is rotated by a predetermined angle in the direction orthogonal to the rotation shaft 5 by the rotation operation of the handle N. The inner side between the two winding start ends 62a and 64a is simultaneously pressed outward by the pair of corners 78a and 78b of the triangular cam member 78, thereby acting between the two winding start ends 62a and 64a. The inner diameters of the coil springs 62 and 64 are increased by the component force acting in the direction opposite to the winding direction of the coil springs 62 and 64, and the rotation restriction of the rotation shaft 5 is released.

  Therefore, according to the rotation restricting device for the rotation shaft configured as described above, the rotation shaft 5 is bent in the direction opposite to the winding direction from substantially the same angular position on the outer periphery of the rotation shaft 5 and opened in the circumferential direction. Since the triangular cam-shaped pressing member 76 is disposed between the winding start end portions 62a and 64a, the assembling work can be greatly simplified.

  Further, both the winding start ends can be obtained by a simple rotation positioning operation in which the triangular cam-shaped pressing member 76 disposed between the winding start ends 62a and 64a is rotated in a direction orthogonal to the rotation shaft 5. The inner side between the portions 62a and 64a is pressed outward by the two corner portions 78a and 78b of the triangular cam member 78, the inner diameters of the coil springs 62 and 64 are expanded, and the rotation restriction of the rotating shaft 5 is released. Can do.

  Next, modified examples of the coil springs 2 and 4 in FIGS. 1A and 1B will be described with reference to FIGS. 18 and 19. FIG. 18A is a side view of a set of coil springs in which the winding direction is reversed by forming a gap of the coil wire diameter between the windings, and FIG. FIG. 19 is a side view of a combined coil spring incorporating a pair of coil springs whose linear directions are opposite to each other. FIG. It is a perspective view which shows the state wound around the outer periphery.

  As shown in FIG. 18A, as a pair of coil springs 82 and 84 whose winding directions are opposite to each other, one left-handed coil spring 82 is spaced from the winding start end portion 82a extending in the radial direction. The winding wire is wound three times to the left so that a gap with a coil wire diameter is formed, and the end portion 82b of the winding wire extends in the radial direction.

  The other right-handed coil spring 84 is wound three times to the right so that a gap of the coil wire diameter is formed between the windings from the winding start end portion 84a extending in the radial direction, and the winding end portion 84b is It is configured to extend in the radial direction.

  Therefore, by inserting the coil springs 82 and 84 whose winding directions are opposite to each other into the gap between the coil wire diameters, an integrated combined coil spring as shown in FIG. 18B is configured. The These combined coil springs are mounted on the outer periphery of the rotating shaft 5, and the end portions 82b and 84b of the winding are respectively attached to the engaging portions 6 on the other member side, thereby rotating the rotating shaft shown in FIG. A motion regulating device can be configured.

  As shown in FIG. 19, the winding start ends 82 a and 84 a and the end portions 82 b and 84 b of the coil springs 82 and 84 have the same phase as viewed from the shaft end of the rotation shaft 5. When mounted on the outer periphery and arranged with the distance L2 between the end portions 82b and 84b separated from each other, the separation distance L1 between the winding start end portions 82a and 84a can be made closer to the axial direction of the rotary shaft 5. . Further, the separation distance L1 between the winding start end portions 82a and 84a can be adjusted by changing the insertion position of the coil springs 82 and 84 inserted between the windings in the axial direction. Needless to say, the inner diameters of the coil springs 82 and 84 can be made larger or smaller than the outer diameter of the rotating shaft, depending on the usage.

(A), (B) is the principle explanatory drawing of the rotation control apparatus of the rotation shaft of the Example of this invention. It is action | operation explanatory drawing of the rotation control apparatus of the rotation shaft of the Example shown to (A) and (B) of FIG. It is a partial side sectional view showing the structure of the rotation restricting device for the rotation shaft of the embodiment shown in FIGS. It is sectional drawing which concerns on the rotation control apparatus of the rotation shaft of the Example shown to (A) and (B) of FIG. It is a usage example of the rotation control apparatus of this invention, Comprising: It is a side view of the desk lamp which shows the partial cross section which incorporated the rotation control apparatus in the arm inside. It is another usage example of the rotation control apparatus of this invention, Comprising: It is a front view which shows the partial cross section of the notebook-type personal computer incorporating the rotation control apparatus in a part of rotation shaft. Similarly, it is a side view of a notebook personal computer showing a partial cross section of a notebook personal computer showing a partial cross section in which a rotation restricting device is incorporated in a part of a rotation shaft. The front view of the window which is another usage example of the rotation control apparatus of this invention, Comprising: The window which shows the partial cross section which incorporated the rotation control apparatus in the rotation shaft of the window frame which pivotally supports a window. It is. Similarly, it is AA sectional drawing of FIG. 8 which shows the state which incorporated the rotation control apparatus in the internal space of the window. It is sectional drawing which shows the support structure which attached the end of the rotating shaft 5 to the main body side via the friction collar. (A), (B) is operation | movement explanatory drawing of the rotation control apparatus of the rotation shaft in the other Example of this invention. (A), (B) is operation | movement explanatory drawing of the rotation control apparatus of the rotation shaft in the other Example of this invention. (A), (B) is operation | movement explanatory drawing of the rotation control apparatus of the rotation shaft in the other Example of this invention. (A), (B) is operation | movement explanatory drawing of the rotation control apparatus of the rotation shaft in the other Example of this invention. (A), (B) is side sectional drawing explaining the effect | action of the rotation control apparatus in the other Example of this invention. (A), (B) is operation | movement explanatory drawing of the rotation control apparatus of the rotation shaft in the other Example of this invention. (A), (B) is operation | movement explanatory drawing of the rotation control apparatus of the rotation shaft in the other Example of this invention. (A) is a side view of a set of coil springs in which the winding direction is reversed by forming a gap of the coil wire diameter between the windings, and (B) is the winding direction in the gap of the coil wire diameter. It is a side view of the combination coil spring which incorporated one set of coil springs which are opposite. It is a perspective view which shows the state which wound the outer periphery of the rotating shaft the combination coil spring incorporating one set of coil springs from which the winding direction was opposite.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation | regulation control apparatus 2, 4 Coil spring 2a, 4a Winding start edge part 2b, 4b Termination part 2'b, 4'b Termination part 5 Rotation shaft 5a Stepped part 6 Locking part 8 Pressing member 10 Wedge member 10a , 10b Guide pin 10 ′, 10 ″ V-groove member 11 Rotation restriction device 12a, 12b Long hole 14 Case body 20 Desktop lamp 21 Rotation restriction device 22 Desk 24 Fixing bracket 25 Stand 26 Swing arm 30 Illuminator 31 times Movement restriction device 32 Personal computer 34 Keyboard device 35 CRT device 36 Display device 38 Operation unit 40 Operation shaft 41 Rotation restriction device 42 Window 44 Window frame 45 Horizontal frame 46 Support member 50 Operation lever 52 Support shaft 54 Press lever 55 Friction collar 56 Main body 57 Side surfaces 62, 64 Coil springs 62a, 64a Winding start ends 62b, 64b End portions 65 Slide shaft 65a Holder 68 Cap 70 Guide pin 71 Support shaft 72 Coil springs 72a and 74a Winding start ends 72b and 74b End portion 76 Pressing member 78 Triangular cam members 78a and 78b Corners 80 Support shaft 81 Case 82 and 84 Coil springs 82a and 84a Winding start ends Part 82b, 84b Terminal part B Base G V groove H Leg part L1, L2 Separation distance N Handle

Claims (2)

Winding around the outer periphery of the rotating shaft 5 fixed to one of the two members and rotatably supported by the other member so that the inner diameter is slightly larger than the outer diameter of the rotating shaft 5 A pair of coil springs 72 and 74 whose linear directions are opposite to each other are inserted and held adjacent to each other, and both the coil springs 72 and 74 are respectively viewed from the shaft end of the rotating shaft 5 and each winding start end portion 72a, 74a crosses each other on the outer periphery of the rotating shaft 5 and is bent in the opposite direction to the winding direction from the intersecting portion so as to extend in a radial direction that opens from the axis of the rotating shaft 5 and winds. The end portions 72b and 74b of the wire are attached to the other member side,
A pressing member 76 formed in a substantially triangular prism shape so that the corners 78a, 78b, 78c or the sides are inscribed inside the winding start ends 72a, 74a intersecting with each other is orthogonal to the rotating shaft 5. Two of the corners 78a, 78b, 78c of the pressing member 76 expand between the winding start end portions 72a, 74a by rotating the pressing member 76. When an external force is applied, the inner diameters of the coil springs 72 and 74 are reduced by the component force in the same direction as the winding direction of the coil springs 72 and 74 acting between the winding start ends 72a and 74a. A rotation restricting device for the rotation shaft, wherein the outer periphery of the rotation shaft 5 is tightened to restrict the rotation of the rotation shaft 5. Winding around the outer periphery of the rotating shaft 5 fixed to one of the two members and rotatably supported by the other member and having the inner diameter slightly smaller than the outer diameter of the rotating shaft 5 A pair of coil springs 62 and 64 whose directions are opposite to each other are inserted and held adjacent to each other, and both coil springs 62 and 64 have respective winding start end portions 62a and 64a as viewed from the shaft end of the rotating shaft 5. The rotating shaft 5 is bent in the direction opposite to the winding direction from adjacent positions separated from each other on the outer periphery of the rotating shaft 5 so as to expand from the axial center of the rotating shaft 5 and extend radially. The end portions 62b and 64b are attached to the other member side,
The pressing member 76 is formed in a substantially triangular prism shape so that the corners 78a, 78b, 78c or the sides are inscribed inside the winding start ends 62a, 64a that are separated from each other.
Are arranged so as to be rotatable in a direction orthogonal to the rotation shaft 5, and two of the corner portions 78 a, 78 b, 78 c of the pressing member 76 are rotated by the rotation operation of the pressing member 76. When an external force is applied to expand the space between the portions 62a and 64a, the two coil springs are applied by a component force in the direction opposite to the winding direction of the coil springs 62 and 64 acting between the winding start end portions 62a and 64a. 62. A rotation restricting device for a rotating shaft, wherein the inner diameters of 62 and 64 are increased to loosen the outer periphery of the rotating shaft 5 to release the rotation restriction of the rotating shaft 5.

Images