JP3232190B2 - Roll screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen.

[0002]

2. Description of the Related Art A conventional screen winding upper limit position setting device is disclosed in Japanese Utility Model Publication No. 58-21919 and Japanese Utility Model Publication No. 3-16400. That is, the screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 58-21919 is a stationary bolt disposed and fixed on a rotating shaft of a screen winding cylinder, and is screwed to the stationary bolt. A moving piece connected to the winding cylinder and movable and rotatable in the axial direction of the stationary bolt, a brake plate mounted on the stationary bolt and pressed against the moving piece, and a braking plate on the stationary bolt axis. Arranged to polymerize on
And a pressing member that resiliently urges and presses the brake plate in the direction of the moving frame. To set the winding upper limit of the screen, first, remove the rotating cylinder from the bracket, rotate and screw the moving piece with fingers or the like, press it fully against the brake plate, and roll it up to the desired position. This is carried out by mounting in a rotating cylinder. Thus, when the screen that has been pulled down is wound up to a desired position, braking is performed by the moving piece, the brake plate, the press-contact body, and the like. A screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 3-16400 discloses a fixed shaft for rotatably supporting a roll pipe, a bolt provided on an extension shaft portion of the fixed shaft, and a nut attached to the bolt. And a brake for rotating the bolt by rotating together with the roll pipe, and a brake for braking the movable frame, wherein the brake is provided on a brake drum provided on an extension of the fixed shaft, and a brake drum. A coil spring that is freely rotatable and has one end locked to the extension shaft of the fixed shaft and the other end free, and an engaging portion provided on the coil spring side of the moving frame; The part engages with the other end of the coil spring to fasten the coil spring to the brake drum, thereby stopping the rotation of the roll pipe. To set the winding upper limit of the screen, first remove the roll pipe from the bracket,
In a state where the moving frame is moved to a position where the engaging portion of the moving frame is engaged with the other end of the coil spring and the coil spring is fixed to the brake drum, the screen is wound up to a desired position on the roll pipe. It is done by attaching. Thus, even if the roll pipe rotates rapidly, when the screen is wound up to the above desired position and stopped, the shock is absorbed by the coil spring via the moving frame, so that the roll pipe can be stopped quietly. Can be.

[0003]

However, the above-mentioned conventional screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 58-21919 is disclosed in Japanese Utility Model Publication No. Sho 58-21919.
In both cases disclosed in Japanese Patent Application Publication No. 16400, when setting the upper limit position of the screen, the rotating cylinder or the roll pipe must be removed from the bracket, so that the setting operation of the upper limit position of the screen is very troublesome. There is a problem. To solve the above problem, there is one disclosed in Japanese Patent Publication No. 5-38839. The screen winding upper limit position setting device shown therein includes a fixed shaft rotatably supporting a roll pipe of a roll blind, a bolt provided on an extension portion extending inward in the axial direction of the fixed shaft, and a nut attached to the bolt. It consists of a moving top that rotates on the bolt by rotating with the roll pipe, and a coil spring that regulates the movement of the moving top. The brake drum is fixed to the bracket, and the brake coil spring is relaxed around the brake drum. Wrapped tightly, loosely fit the notched sector with a part of the circumference around the coil spring as a notch, loosely fit the dial on the outer circumference of the sector, and cut the projecting portions at both ends of the braking coil spring. Insert into the notch, insert the inner peripheral protrusion provided on the inner periphery of the dial into the coil spring both ends protrusion in the sector notch, and use the retaining ring And interior color to the brake drum so as not to be able to get out of the part, to secure the sector to color,
An outer end portion of a fixed shaft extending axially outward from the roll pipe is fixed to an axial hole passing through the axis of the sector and the collar to support the roll pipe. When the sector is to be rotated from the stationary bolt side, the sector pushes the protruding end of the brake coil spring in a direction in which the brake coil spring is tightened, so that the brake coil spring is fastened to the brake drum and stops the rotation of the sector. On the other hand, when the dial is turned, the inner peripheral projection of the dial pushes the protruding end of the brake coil spring in the direction in which the brake coil spring expands, and the brake coil spring is expanded to rotate the sector, that is, the bolt, together with the dial. Therefore, the setting of the upper limit position of the screen can be performed by turning the dial and adjusting the position of the moving frame on the bolt. This allows
With the roll pipe attached to the bracket, the winding upper limit position of the screen can be set. However, the one disclosed in Japanese Patent Publication No. 5-38839 also has a problem that a gap corresponding to the thickness of the dial is formed between the adjacent screens when the window type is used. In addition, since the rotational force of the roll pipe is transmitted to the bolt through the moving top and the bolt is prevented from rotating, the brake coil spring is built into the dial. It is necessary to have enough power to push. However, since the roll screen generally emphasizes the appearance, the width and the radial dimension of the dial are reduced, and there is a problem that it is difficult to rotate the dial. Furthermore, since the setting of the upper limit position is hardly changed once it is set, there is a problem that the appearance is deteriorated if the operation unit is exposed as a dial.

[0004]

SUMMARY OF THE INVENTION According to the present invention, between a clutch drum rotatably supported by a side plate and a clutch cap fixed to the side plate, fastening and fastening are performed on the inner peripheral surface of the clutch cap. A clutch spring that is releasably fitted and connected to the clutch drum so as to be rotatable relative to the clutch drum by a predetermined angle is provided. By rotating a spring controller detachably attached to the clutch drum, the clutch spring is fastened to the clutch cap. The above-mentioned problem is solved by canceling the condition and rotating the clutch drum to set the winding upper limit position of the screen. That is, the roll screen of the present invention includes a winding pipe (16) whose both ends are rotatably supported by side plates (14) provided at both ends of the set frame (12), and one end of the winding pipe (16). The screen (1
8) and a screen (18) which is always on the winding pipe (16)
A winding spring for applying a force for rotating in the winding direction, and a winding upper position setting device capable of setting a winding upper position of the screen (18) to the winding pipe (16), The winding upper limit position setting device includes a clutch drum (28) whose one end is rotatably supported by the side plate (14), and a side plate (1).
A clutch cap (22) fixed to 4) and supporting the other end of the clutch drum (28) so as to be relatively rotatable.
A clutch spring (32), which is engaged with the inner peripheral surface of the clutch cap (22) so that the clutch can be released and released, and is connected to the clutch drum (28) so as to be rotatable at a predetermined angle; And a spring controller (58) detachably attached to the clutch cap (22) and detachably attached to the clutch cap (22), and connected to the clutch drum (28) concentrically and integrally rotatable therewith. Main spindle (34)
And a bolt shaft (52) concentrically connected to the main shaft (34) so as to be integrally rotatable with the main shaft (34), and connected to the winding pipe (16) so as to rotate integrally with the main shaft (34). A nut member (54) meshed movably in the axial direction; and a bolt shaft (5) of the nut member (54).
A regulating member (56) capable of regulating the axial movement of (2).
And having the following. In addition, the code | symbol in a parenthesis shows the corresponding member of the Example mentioned later.

[0005]

[Function] First, set the winding upper limit position of the screen.
With the screen completely wound on the winding pipe, the spring controller is mounted on the clutch drum and rotated in the screen unwinding direction. As a result, the clutch spring is contracted by the spring controller,
Since the engagement with the clutch cap is released and the clutch spring becomes rotatable, the clutch spring and the clutch drum rotate integrally by the spring controller.
The rotation of the clutch drum rotates the bolt shaft integrally with the clutch drum via the main shaft, but the rotation of the nut member is restricted because the winding pipe does not rotate in the screen unwinding direction due to the elastic force of the winding spring. So
The nut member moves on the bolt shaft toward the regulating member. When the nut member moves to the restricting member and comes into contact with the restricting member, the nut member cannot move any further, and thus starts rotating integrally with the bolt shaft. For this reason, since the winding pipe starts to rotate integrally with the nut member overcoming the elastic force of the winding spring, the screen is unwound. Lower the screen to the desired position and remove the spring controller from the clutch drum. As a result, the winding pipe attempts to rotate in the screen winding direction due to the elastic force of the winding spring, so that the nut member also attempts to rotate in the screen winding direction, but is restricted when the nut member rotates in the screen winding direction. Since it will move in the member direction, the nut member already in contact with the regulating member
Since the rotation of the bolt shaft is restricted, it becomes impossible to rotate. As a result, the rotation of the winding pipe is also restricted,
The winding upper limit position of the screen is set. In this way, the spring controller can be attached to the clutch drum and rotated to set the winding upper limit position of the screen. After setting, the spring controller can be removed from the clutch drum. However, since the spring controller is not arranged between the adjacent screens, the gap generated between the adjacent screens can be reduced. In addition, the fastening between the clutch spring and the clutch cap can be released by contracting the clutch spring by rotation of the spring controller, which is relatively easy to apply force during operation due to its large width and radial dimension, thereby facilitating the setting operation. It is.

[0006]

FIG. 1 shows a roll screen 1 embodying the present invention.
Indicates a part of 0. Side plates 1 are provided at both ends of a set frame 12 for attaching a roll screen 10 to a window frame.
4 (the side plate at the right end in FIG. 1 is not shown). A winding pipe 16 is rotatably supported by the side plate 14. Winding pipe 16
As shown in FIG. 3, one end of a screen 18 is connected by a screen stopper plate 17 so as to be wound and unwound. The winding pipe 16 is constantly applied with a force in the direction of winding the screen 18 by a winding spring (not shown). The other end of the screen 18 is connected to a weight bar 20, as shown in FIG. A connecting portion 24 is formed on the side plate 14 at the left end in FIG. The clutch cap 22 has a cylindrical large-diameter portion 22a formed from the open end of the coupling portion 24 side to a predetermined position in the axial direction, and a cylindrical small-diameter portion 2 having a smaller radial dimension than the large-diameter portion 22a.
2b, and a side wall 22c connecting the large-diameter portion 22a and the small-diameter portion 22b. Clutch cap 22
As shown in FIG. 2, notches 24 a are formed at every 90 degrees in the circumferential direction. In the notch 24a of the clutch cap 22, a projecting piece 26a formed at every 90 degrees in the circumferential direction is immovably fitted to one end of a substantially cylindrical drum receiving plate 26. The drum receiving plate 26 is formed such that the other end of which the edge is bent in the radial direction protrudes from the left end surface of the side plate 14 in FIG. 1 to form a circular space 14 a formed in the side plate 14. Are fitted. A clutch drum 28 is arranged inside the clutch cap 22. The tip 28 f of the clutch drum 28 is rotatably fitted to the edge on the other end of the drum receiving plate 26. The clutch drum 28 has a large diameter portion 28a having a larger diameter than the tip portion 28f formed by forming a shoulder portion 28g from the tip portion 28f, and a large diameter portion formed by forming a shoulder portion 28d from the large diameter portion 28a. Medium diameter part 28b smaller in diameter than part 28a
And a small diameter portion 28c formed by forming a shoulder portion 28e from the middle diameter portion 28b and having a smaller diameter than the middle diameter portion 28b. The clutch drum 28 is formed with a through hole 29 having a partly rectangular cross section and a partly circular cross section penetrating the axis of the clutch drum 28. The through-hole 29 has a circular section in the side plate 14.
Located on the side. Also, the clutch drum 28
As shown in FIG. 2, a notch 30 is formed at a predetermined position in the circumferential direction from the front end portion 28f to the small diameter portion 28c. The clutch drum 28 has a medium diameter portion 28b disposed at the same axial position as the large diameter portion 22a of the clutch cap 22 and a small diameter portion 28c
Are fitted to the small diameter portion 22b of the clutch cap 22 so as to be relatively rotatable. Also, the clutch drum 28
The shoulder portion 28e is formed on the side wall 22c of the clutch cap 22.
1 and the movement in the right direction in FIG. 1 is restricted, and the shoulder 28g contacts the drum receiving plate 26 to restrict the movement in the left direction in FIG. A clutch spring 32 is provided between the large diameter portion 22a of the clutch cap 22 and the middle diameter portion 28b of the clutch drum 28. As shown in FIG. 2, both ends 32 a and 32 b of the clutch spring 32 are bent in the inner diameter direction, and are disposed in the notch 30 of the clutch drum 28. The clutch spring 32 is connected to the shoulder 2 of the clutch drum 28.
8d and the side wall 22c of the clutch cap 22, the movement in the axial direction is restricted. The clutch spring 32 can be fastened to and released from the inner peripheral surface of the clutch cap 22. One end 36 of the rectangular cross section of the main shaft 34 is provided at the rectangular cross section of the through hole 29 of the clutch drum 28.
However, it is fitted so as to be able to rotate integrally therewith and not to be relatively movable in the axial direction. A stopper device 38 is provided on a circular section of the main shaft 34. The stopper device 38 includes a grooved drum 40 and a stopper case 42.
, A stopper case cap 44, a clutch spring 46, and a ball 48. The grooved drum 40 is rotatably fitted to the outer diameter portion of the main shaft 34, and a groove 50 for guiding the movement of the ball 48 is formed on the outer peripheral surface. The stopper case 42 is rotatably fitted to the outer diameter portion of the grooved drum 40 with the ball 48 interposed therebetween, and the outer diameter portion is fixed to the winding pipe 16 so as to rotate integrally therewith. . The grooved drum 40 and the stopper case 42 move the ball 4 guided and moved by the groove 50 by the relative rotation of these.
Depending on the position of 8, the connection is made so as to be integrally rotatable or the connection is released. The stopper case cap 44
The stopper case 42 is provided at one end of the stopper case 42 and connects the stopper case 42 to the main shaft 34 so as to be relatively rotatable. One end of the clutch spring 46 is connected to the grooved drum 40 and is provided on the outer diameter portion of the main shaft 34. When the grooved drum 40 rotates in the unwinding direction of the screen 18, the clutch spring 46 is expanded and expanded. The connection between the grooved drum 40 and the main shaft 34 is released, but when the grooved drum 40 rotates in the screen 18 winding direction, the grooved drum 40 and the main shaft 34 are tightened. One end of a bolt shaft 52 is coaxially connected to the other end of the main shaft 34 so as to be integrally rotatable therewith. A nut member 54 is meshed with the bolt shaft 52 so as to move in the axial direction by the rotation thereof. The nut member 54 has three protrusions 16a, 16b, and 16c formed at predetermined intervals in the circumferential direction on the inner diameter of the winding pipe 16, and has a predetermined interval in the outer diameter at the outer diameter. Three grooves 54a, 54b and 54c formed by opening
And are fitted together and connected so as to be integrally rotatable. A regulating member 56 for regulating movement of the nut member 54 is provided at the other end of the bolt shaft 52. On the side plate 14 side of the through hole 29 of the clutch drum 28, a spring controller 58 is provided detachably. The spring controller 58 includes, as shown in FIG.
A protrusion 59 protruding in the outer diameter direction at a symmetrical position of the outer diameter portion.
And 61 are formed. The spring controller 58 has a projection 60 having a circular section in the axial center thereof protruding in the axial direction. The projection 62 has a substantially fan-shaped section at a predetermined radial distance from the projection 60. Are formed so as to project in parallel with the projection 60 in the axial direction. The protruding portion 60 can be relatively rotatably fitted into a circular section of the through hole 29 of the clutch drum 28. Further, the protrusions 62 are provided at the ends 32 a and 3 of the clutch spring 32.
It can be inserted between 2b so as to be rotatable by a predetermined angle. The upper limit position setting device is constituted by the clutch cap 22, the drum receiving plate 26, the clutch drum 28, the clutch spring 32, the main shaft 34, the bolt shaft 52, the nut member 54, the regulating member 56, and the spring controller 58.

Next, a method of setting the winding upper limit position of the screen 18 will be described. First, with the screen 18 completely wound around the winding pipe 16, the projection 60 of the spring controller 58 is inserted into the through hole 29 of the clutch drum 28, and the projection 62 is inserted between the ends 32 a and 32 b of the clutch spring 32. Each of them is inserted and has the protruding portions 59 and 61 of the spring controller 58, and is rotated in the direction of the arrow in FIG. 4 (the direction of unwinding the screen 18).
As a result, the projection 62 of the spring controller 58 rotates clockwise in FIG.
a, and presses the end 32a clockwise in FIG.
Therefore, the clutch spring 32 is contracted, so that the clutch spring 32 and the clutch cap 22 are disengaged from each other, and the clutch spring 32 becomes rotatable. This allows
The end portion 32a of the clutch spring 32 is pressed by the projection 62.
Contacts the end of the notch 30 of the clutch drum 28, the clutch spring 32, the clutch drum 28 and the main shaft 3
4 rotates together. For this reason, the bolt shaft 52 rotates integrally with the main shaft 34, but since the winding pipe 16 does not rotate in the unwinding direction of the screen 18 due to the elastic force of the winding spring, the rotation of the nut member 54 is restricted.
It moves on the axis of the bolt shaft 52 toward the regulating member 56. When the nut member 54 moves to the regulating member 56, the nut member 54 comes into contact with the regulating member 56 and cannot move any further, so that the nut member 54 starts to rotate integrally with the bolt shaft 52. For this reason, the winding pipe 16 overcomes the elastic force of the winding spring and the nut member 54
The screen 18 is unwound to start rotating together with the screen. Thereafter, the screen 18 is lowered to a desired position, and the spring controller 58 is removed from the clutch drum 28. As a result, the winding pipe 16 attempts to rotate in the winding direction of the screen 18 by the elastic force of the winding spring.
Attempt to rotate in the winding direction. However, nut member 5
4 moves to the right in FIG. 1 when it rotates in the winding direction of the screen 18.
Further, since the clutch spring 32 is not pressed by the projection 62 of the spring controller 58, the clutch spring 32 expands and is fastened to the clutch cap 22, thereby restricting the rotation of the clutch drum 28, the main shaft 34, and the bolt shaft 52. Therefore, the nut member 54 cannot rotate. Therefore, the rotation of the winding pipe 16 is also restricted.
Thereby, the winding upper limit position of the screen 18 is set. As described above, the winding upper limit position of the screen 18 can be set only by inserting the spring controller 58 into the clutch drum 28 and rotating it.
The setting operation of the winding upper limit position of the screen 18 is easy. Also, fine adjustment of the set position can be easily performed.

When lowering the screen 18 after setting the winding upper limit position of the screen 18, the weight bar 20 is lowered, and the winding pipe 16 is rotated in the counterclockwise direction in FIG. 4 (the direction of the arrow in FIG. 4). Thereby, the winding pipe 16 rotates the nut member 54 clockwise in FIG. 3 and also rotates the stopper case 42 clockwise in FIG. By the rotation of the stopper case 42, the stopper case 42 and the grooved drum 40 are fastened via the ball 48, and the grooved drum 40 also rotates in the direction of unwinding the screen 18, but the grooved drum 40 unwinds the screen 18. When rotated in the direction, the clutch spring 46 is pushed and expanded, and the fastening between the grooved drum 40 and the main shaft 34 is released, so that the main shaft 34 does not rotate. For this reason, the bolt shaft 5
2 does not rotate, so that the nut member 54 moves on the bolt shaft 52 to the left in FIG. Thereby, the screen 18 is unwound from the winding pipe 16. After lowering the weight bar 20 after lowering the screen 18 to a desired position,
The winding pipe 16 tends to rotate in the winding direction of the screen 18 by the elastic force of the winding spring. Therefore, a rotational force in the winding direction of the screen 18 is applied to the grooved drum 40 via the stopper case 42, so that the clutch spring 46 is tightened, and the grooved drum 40 and the main shaft 34 are fastened. As a result, the main shaft 34 rotates counterclockwise in FIG.
After rotating the clutch drum 28 by a predetermined angle, the end of the notch 30
And presses the end 32a counterclockwise in FIG. Since the pressing force applied to the clutch spring 32 is a force in a direction in which the clutch spring 32 is expanded and fastened to the clutch cap 22, the rotation of the clutch drum 28 is performed by the clutch spring 32 fastened to the clutch cap 22. Be bound. As a result, the rotation of the main shaft 34 is also restricted, so that the rotation of the winding pipe 16 is restricted via the grooved drum 40 and the stopper case 42. As a result, the screen 18 stops at a desired position.

Next, when raising the screen 18, the weight bar 20 is slightly lowered. As a result, the stopper case 42 rotates slightly in the screen unwinding direction together with the winding pipe 16, so that the ball 48 is guided by the groove 50 and the fastening between the stopper case 42 and the grooved drum 40 is released. . For this reason, the winding pipe 16 and the stopper case 42 rotate counterclockwise in FIG. 3 by the elastic force of the winding spring. On the other hand, spindle 3
In No. 4, since the rotation of the clutch drum 28 is restricted by the clutch spring 32 fastened to the clutch cap 22 as described above, the rotation of the clutch drum 28 is restricted. As a result, since the rotation of the bolt shaft 52 is also restricted, the nut member 54 that rotates integrally with the winding pipe 16 is formed.
Moves rightward in FIG. 1 on the bolt shaft 52. When the nut member 54 moves to the position of the restriction member 56, the rotation of the winding pipe 16 is restricted because the nut member 54 contacts the restriction member 56 and cannot rotate any more. Thus, the lifting of the screen 18 stops.
The position where the screen 18 stops is the winding upper limit position of the screen 18 set previously.

In the present invention, since the spring controller 58 is used to set the winding upper limit position of the screen 18, the spring controller 58 is used not only when the winding upper limit position is set but also when the other side plate 1 is set.
4 can also be used when adjusting the torque force of the take-up spring. Further, in the present invention, the side plate on the stopper side of the existing roll screen is provided with a one-way clutch mechanism.
2. Since it is only necessary to mount a unit in which the nut member 54 and the regulating member 56 are assembled, the existing roll screen can be very easily changed to the specifications of the present application.

[0011]

According to the present invention, between the clutch drum rotatably supported by the side plate and the clutch cap fixed to the side plate, fastening and releasing of the fastening to the inner peripheral surface of the clutch cap are performed. A clutch spring that is fitted to the clutch drum and rotatably connected to the clutch drum by a predetermined angle is provided, and the rotation of the clutch spring releases the clutch spring from the clutch cap and rotates the clutch drum to rotate the clutch drum. A spring controller capable of setting the winding upper limit position is detachably attached to the clutch drum. As a result, the spring controller is attached to the clutch drum and rotated to set the winding upper limit position of the screen.After the setting, the spring controller can be removed from the clutch drum, so that even when the roll screen is used in a continuous window type. Since the spring controller is not arranged between the adjacent screens, the gap generated between the adjacent screens can be reduced. Further, since the spring controller serving as the operation unit is not exposed, the appearance can be improved. Further, the fastening between the clutch spring and the clutch cap can be released by contracting the clutch spring by rotation of the spring controller, which is relatively easy to apply force during operation because of its large width and radial dimension,
The work of setting the winding upper limit position can be facilitated.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a roll screen embodying the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG.

FIG. 4 is a side view of a roll screen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roll screen 12 Set frame 14 Side plate 16 Winding pipe 18 Screen 22 Clutch cap 28 Clutch drum 32 Clutch spring 34 Main shaft 52 Bolt shaft 54 Nut member 56 Restriction member 58 Spring controller

Claims (1)

(57) [Claims] 1. A winding pipe (16) whose both ends are rotatably supported by side plates (14) provided at both ends of a set frame (12), and one end of the winding pipe (16) is wound and wound. A screen (18) releasably connected, a winding spring for constantly applying a force to rotate the screen (18) in the winding direction to the winding pipe (16), and a screen to the winding pipe (16) (18) a winding upper limit position setting device capable of setting a winding upper limit position, wherein the roll upper limit position setting device is supported at one end by the side plate (14) so as to be relatively rotatable. A clutch drum fixed to the side plate and supporting the other end of the clutch drum so as to be relatively rotatable. (22) a clutch spring (32) which is fitted to the inner peripheral surface of the clutch cap (22) so as to be able to be fastened and released, and is connected to the clutch drum (28) so as to be rotatable at a predetermined angle; The clutch cap (2) is detachably attached to the clutch drum (28), and the clutch cap (2) of the clutch spring (32).
2) Spring controller (5
8), a main shaft (34) connected to the clutch drum (28) concentrically and integrally rotatable therewith, and a bolt shaft (52) connected to the main shaft (34) concentrically and integrally rotatable therewith; A nut member (54) coupled to the winding pipe (16) so as to rotate integrally therewith and movably engaged with the bolt shaft (52) in the axial direction; and a bolt shaft of the nut member (54). And a regulating member (56) capable of regulating the movement of the (52) in the axial direction.