JP3905643B2 - Swivel device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a swivel device that uses a shaft member and a housing member that are relatively rotated.
More specifically, the present invention relates to a swivel device that regulates a rotation range, which is suitable when a shaft member and a housing member are relatively rotated beyond 360 degrees.
[0002]
[Prior art]
In general, in an industrial robot, the microcomputer is operated by operating a microcomputer based on numerical data or input data by a teaching operation, or the robot is operated by a fixed electrical sequence control device.
In this case, in order to enhance the function as an industrial robot, the wrist WR on the free end side of the robot is often set so that the rotational operation angle is 360 degrees or more.
[0003]
Conventionally, as a structure for restricting a rotation axis to a rotation range of 360 degrees or more, for example, there is a structure described in Japanese Patent Publication No. 6-104312.
That is, in FIGS. 7 to 12, reference numeral 51 denotes a fixing member fixed to the wrist portion of the industrial robot. A rotating member 52 is attached to the fixing member 51 so as to be rotatable about a horizontal axis. Yes. A part of the outer periphery of the rotating member 52 is provided with a protrusion 53 and notches 54 and 55 protruding in the radial direction of the rotating member 52.
[0004]
On the other hand, a bracket 56 positioned above the locus of the protrusion 53 is attached to the fixing member 51. One end of a stopper member 58 is swingably attached to the bracket 56 via a pin 57 disposed vertically.
The other end of the stopper member 58 is bifurcated to form leg portions 59 and 60, and the stopper member 58 is formed in a bowl shape as a whole. Further, one end side of the stopper member 58, that is, Z₁The direction side is thick, and steps 61 and 62 are formed on the rotating member 52 side.
The rotating member 52 is point O by an appropriate driving means.₂Around the center.
[0005]
As shown in FIG. 8 which is a plan view, when the rotating member 52 is substantially at the center of the rotational operation range, the stopper member 58 holds the protrusion 53 between its leg portions 59 and 60 and swings at a constant angle. It is in a possible state.
In this state, for example, the rotating member 52 is moved to an arrow A shown in FIG.₁Point O in the direction₂9, the projection 53 pushes and moves the leg portion 59 as shown in FIG. 9, and the axis O of the pin 57 from the state shown in FIG. 8.₁The stopper member 58 is rotated counterclockwise around the center.
At this time, the step 61 of the stopper member 58 comes into contact with the side surface 521 of the rotating member 52, and the rotation of the stopper member 58 is restrained until the notch 54 is rotated again around the step 61 portion.
When the rotating member 52 continues to rotate substantially in the same direction and the notch 54 faces the step 61, the protrusion 53 presses the left side surface of the leg 60 as shown in FIG.₁Rotate counterclockwise around the center.
As a result, the leg portion 59 comes into contact with the bracket 56 and the rotation of the stopper member 58 is stopped. Accordingly, the rotation of the protrusion 53 is also stopped and the rotation of the rotating member 52 is stopped.
[0006]
From the state shown in FIG. 10, A in FIG.₂When the rotating member 52 is rotated in the direction, the rotating member 52 rotates almost once, and the protrusion 53 pushes and moves the leg portion 60, and the step 62 comes into contact with the side surface 521 of the rotating member 52 through the state shown in FIG. Further, when the rotating member 52 is rotated almost once, the protrusion 53 comes into contact with the leg portion 59 to rotate the stopper member 58. Thereafter, the leg portion 60 is brought into contact with the bracket 56, and the rotating member 52 is rotated. Stop.
[0007]
Therefore, the contact state between the step 61 and the side surface 521 of the rotating member 52 will be described in detail.
In the state shown in FIG. 9, the gap Δy is actually between the step 61 and the side surface 521 of the rotating member 52.₁However, if this gap is zero, that is, Δy₁= 0.
From the state of FIG. 9, the rotating member 52 is moved to the arrow A shown in FIG.₁When the rotation is nearly one rotation in the direction, the protrusion 53 comes into contact with the leg portion 60 as shown in FIG. By this contact, the stopper member 58 has a point O shown in FIG.₁As a result, the stopper member 58 tends to be displaced as indicated by a two-dot chain line, for example.
[0008]
Incidentally, as described above, the gap between the step 61 and the side surface 521 of the rotating member 52: Δy₁Is zero, when the stopper member 58 is displaced as indicated by a two-dot chain line as shown in FIG.₂Tilt to the position of the direction.
[0009]
However, since the step 61 and the side surface 521 of the rotating member 52 are in contact with each other until the protrusion 53 is in contact with the leg portion 60, the rotation of the stopper member 58 is restrained. As described above, when the projection 53 comes into contact with the leg portion 60, the step 61 and the side surface 521 of the rotating member 52 are not separated from each other regardless of the notch 54, as described above.₁Is in contact with zero.
[0010]
That is, as shown in FIG. 11, after the protrusion 53 comes into contact with the leg portion 60, the rotating member 52 further moves to Y.₁Direction, ie, A in FIG.₁If it is rotated in the direction, as described above, the stopper member 58 is moved so that the step 61 exceeds the position of the side surface 521 of the rotating member 52 as shown by the two-dot chain line, that is, Y₂The end C of the notch 54 is about to be displaced in the direction.₁That is, the notched end portion C of the side surface 521 of the rotating member 52.₁Is in contact with the step 61, the stopper member 58 is prevented from rotating.
[0011]
Therefore, in reality, the stopper member 58 in FIG.₁, The gap between the step 61 and the side surface 521 of the rotating member 52: Δy as shown in FIG.₁Is provided. Of course, a gap is similarly provided between the step 62 and the side surface 521 of the rotating member 52.
The above-described conventional apparatus is used with the state shown in FIG. 7 as the front state and the state shown in FIGS. 8 to 11 as the planar state. That is, the stopper member 58 is horizontally disposed through the pin 57. Since it is swung, even if a gap is provided between the steps 61 and 62 and the side surface 521 of the rotating member 52, the present invention can be implemented without any particular problem.
[0012]
[Problems to be solved by the invention]
However, the conventional configuration has the following problems. That is, as described above, in the state shown in FIG. 9, the gap Δy is actually between the step 61 and the end surface 521 of the rotating member 52.₁Therefore, a problem arises when the pin 57 that supports the stopper member 58 in a swingable manner is disposed in a horizontal state, for example.
[0013]
For example, as shown in FIG. 12, when the long axis of the pin 57 is in a horizontal state and the rotating member 52 is driven to rotate about the vertical axis, the gap Δy between the step 61 and the end surface 521 of the rotating member 52 is₁Corresponding to the axis O of the pin 57₁The stopper member 58 that rotates on the vertical plane with respect to the center is in a swingable state between two positions indicated by a solid line and a two-dot chain line in FIG.
That is, in FIG.₁If the direction is the direction of gravity, the stopper member 58 is at a position indicated by a solid line by its own weight.
In this state, the rotating member 52 rotates, and the protrusion 53 becomes X₂When it is rotated so as to move in the direction, the protrusion 53 and the stopper member 58 come into contact with each other.
[0014]
In this case, as shown in FIG. 12 (B), the contact point P between the protrusion 53 and the stopper member 58.₂X by the rotational drive of the rotary member 52₂Directional force F₁Works. This force F₁Line segment O₁P₂Component force F perpendicular to_ThreeThus, the stopper member 58 is point O.₁Attempts to rotate clockwise around However, the protrusion 53 that is integral with the rotating member 52 moves in the X direction, but the position is fixed in the Z direction.₂It will be fixed in the contacted state.
For this reason, the rotation member 52 cannot be restricted to a desired rotation range.
[0015]
By the way, in an industrial robot, a moving tool such as a cutting tool, a gripping tool, a cutting tool or a welding torch attached to a free end is repeatedly moved and stopped at a high speed. In many cases, an inertial force in an unexpected direction is applied.
[0016]
For this reason, even when the long axis of the pin 57 that swingably supports the stopper member 58 is arranged to be vertical, the stopper member 58 is caused by an unexpected inertial force that is applied when the industrial robot is operated. As shown in FIG. 12, for example, as shown in FIG. 12, the protrusion 53 and the stopper member 58 come into contact with each other and the rotating member 52 is fixed at an unexpected position. Will end up.
[0017]
The present invention has been made in view of the above problems, and its object is to attach the shaft member and the housing member to the wrist portion even if the wrist portion of the industrial robot is repeatedly and appropriately operated. By providing a swivel device suitable for an industrial robot, which can operate in a desired state by a swivel device that is used by relatively rotating the head and the wrist part in a desired rotation range. is there.
[0018]
According to a first aspect of the present invention, there is provided a swiveling device that relatively rotates the shaft member (1) and the housing member (2), and a striker (3) that protrudes in the radial direction of the shaft member (1) and the striker. A piece (not shown) having a notch (401) formed at the base end thereof, which is rotatably supported by the housing member (2) by a support pin (5) parallel to the long axis of the shaft member outside (3). 4) and a holding pin for a piece (4) which is provided with a bottomed hole (402) at the tip of the piece (4) and is pushed outward by the spring force of the compression spring (6) inserted into the hole (402). 7) and contact surfaces (802, 803) that are formed in a U-shape and abut the base end of the piece (4) in the U-shaped opening. A contact guide surface (801) is formed at the bottom, and the piece (4) has the support pin (5) as a rotation center. The base end of the piece (4) contacts the contact surface (802 or 803) of the stopper member (8) and the tip of the piece holding pin (7) is pushed out by the spring force. A stopper member (8) attached to the housing member (2) for stopping the rotation of the piece (4) by coming into contact with the end portion of the contact guide surface (801), and the piece (4) Of the stopper member (8) is brought into contact with one of the contact surfaces (802 or 803), and the distal end portion of the holding pin for the piece (7) is pushed out by the spring force, thereby the contact guide surface. When the shaft member is in contact with one end portion of (801), the shaft member is further pushed in a direction in which the base end portion of the piece (4) is pressed against one contact surface (802 or 803) of the stopper member (8). (1) and the housing member (2) are relatively rotated. In this case, the rotation of the piece (4) is prevented, the relative rotation between the shaft member (1) and the housing member (2) is prevented, and the base end of the piece (4) is connected to the stopper member (8). When the shaft member (1) and the housing member (2) are rotated relative to each other in a direction away from one of the contact surfaces (802 or 803), the striker (3) When the piece (4) is rotated by being caught by the notch (401), the tip of the piece holding pin (7) is moved from one end of the contact guide surface (801) to the other end. Then, it is pushed out by the spring force and comes into contact with the other end of the contact guide surface (801) to stop the rotation of the piece (4), so that the striker (3) moves away from the piece (4). When rotating the shaft member (1) and the housing member (2) relative to each other, Stopping the rotation of the piece (4) while maintaining the state where the tip of the holding pin for recording piece (7) is pushed out by the spring force and is in contact with the other end of the contact guide surface (801) The swivel device is characterized by the following.
According to a second aspect of the present invention, the swiveling device is characterized in that an abutting guide surface (801) of the stopper member (8) according to the first aspect of the invention has an intermediate portion curved toward the support pin (5). It is.
[0019]
[Action]
When the shaft member and the housing member are relatively rotated, the piece tilts around the support pin by the striker protruding from the shaft member. When the piece tilts by a predetermined amount, the piece contacts the stopper member.
[0020]
In this case, a holding pin for a piece is loosely inserted in a bottomed hole that is disposed on the piece and opens outward in the radial direction of the shaft member, and is urged outward by a compression spring. The piece holding pin is prevented from being pulled out from the piece while being in contact with the contact guide surface of the stopper member.
[0021]
That is, because the elastic force of the intervening compression spring interacts with the piece holding pin that is prevented from being pulled out from the piece while being in contact with the contact guide surface of the stopper member, and the piece that is inserted into the piece holding pin, With this elasticity, the piece is positioned in contact with the stopper member. In the state where the piece is in contact with the stopper member, the striker rotates nearly 360 degrees in the direction opposite to the contact direction between the piece and the stopper member, and then the direction in which the contact state between the piece and the stopper member is released In this case, the striker is engaged with the notched portion where the piece is depressed, and the piece and the striker are relatively rotated. In this case, when the piece tilts a predetermined amount around the support pin, it abuts against the stopper member.
In the above, when the striker further rotates in the same direction by nearly 360 degrees, the striker comes into contact with the piece member positioned while coming into contact with the stopper member, and the rotation of the shaft member and the housing member to which the striker is fixed is regulated. .
[0022]
That is, in a state where the piece is in contact with the stopper member, the striker contacts the piece and relative rotation is prevented in a direction in which the contact state between the piece and the stopper member is strengthened.
As described above, the relative rotation angle between the shaft member and the housing member is restricted to about 720 degrees.
[0023]
Of course, the elasticity of the compression spring acts between the piece that rotates about the support pin and is switched to the two positions that contact the stopper member and the piece holding pin that contacts the contact guide surface of the stopper member. Therefore, the piece is forcibly positioned by this elasticity while in contact with the stopper member.
[0024]
In other words, the piece is forcibly positioned at one of the two positions where it comes into contact with the stopper member, except when the striker is engaged with the notched portion where the piece is depressed and the piece is mechanically rotated. Therefore, the turning device according to the present invention is suitable for an industrial robot.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. For example, the case where the turning device according to the present invention is applied to the wrist of an articulated robot will be described.
[0026]
1 to 4, an appropriate operation element such as a cutting tool, a gripping tool, a cutting tool, or a welding torch CE, for example, a welding torch CE is attached to the wrist WR of the articulated robot R via an attachment member BK. It has been.
[0027]
Reference numeral 1 denotes a shaft member of the wrist WR, and reference numeral 2 denotes a housing member of the wrist WR. The housing member 2 and the shaft member 1 are used while being relatively rotated. It demonstrates as what is fixed to wrist part WR.
That is, the shaft member 1 is rotatably attached to the housing member 2 via an appropriate bearing (not shown). Reference numeral 3 denotes a striker that is integrally attached to the shaft member 1 and protrudes in the radial direction of the shaft member 1. The striker 3 has a radial tip portion that is tapered as shown in FIG. 2. Yes.
4 is a piece that is pivotally supported by the housing member 2 at a position outside the striker 3 via a support pin 5 parallel to the long axis of the shaft member 1, and on the shaft member 1 side of this piece 4, A recessed notch 401 that opens in the radial direction of the shaft member 1 is formed, and a bottomed hole 402 that opens outward in the radial direction of the shaft member 1 is formed on the opposite side of the piece 4 from the shaft member 1. Is formed.
[0028]
6 is a compression spring inserted into the bottomed hole 402 of the piece 4, and 7 is loosely inserted into the bottomed hole 402 of the piece 4, and the compression spring 6 opens the bottomed hole 402 in the opening direction. A holding pin 8 for the piece urged outward, 8 is a stopper member, and the stopper member 8 is provided with a contact guide surface 801 for preventing the holding pin 7 for urging outwardly from being pulled out. First and second contact surfaces 802 and 803 are formed which contact the piece 4 when the piece 4 tilts a predetermined amount in both directions around the support pin 5 as a rotation center.
[0029]
For example, the housing member 2 is formed so as to be split in the axial direction having a fastening flange on each end face. One of the housing members 22 is cut out in the radial direction including the fastening flange, and the stopper member 8 is inserted into the cut-out portion 221 so that the stopper member 8 and the housing member 22 are integrated by a fastening bolt. Mounted on.
[0030]
Thereafter, the respective fastening flanges of the housing members 21 and 22 are brought into contact with each other and fastened to form an integrated housing member 2.
[0031]
The swiveling device is constituted by the above 1 to 8.
[0032]
Next, the operation of the swivel device having the above configuration will be described.
Assume that the articulated robot R shown in FIG. 1 is appropriately driven, and the striker 3 and the piece 4 are arranged as shown in FIG. 5A, for example.
[0033]
That is, as shown in FIG.₂The shaft member 1 is moved to a point O by a rotary drive machine (not shown) while being positioned on the direction side.₂Is rotated clockwise about the center of rotation, the piece 4 abutting on the striker 3 becomes the axis O of the support pin 5._ThreeAttempts to rotate counterclockwise around the center.
By the way, as shown in FIG. 5A, the piece 4 is in contact with the first contact surface 802 of the stopper member 8, so that the point O_ThreeThe counterclockwise rotation of the piece 4 around the center is prevented, and eventually the point O₂The rotation of the shaft member 1 around the rotation center in the clockwise direction is restricted.
[0034]
In FIG. 5A, the shaft member 1 is point O.₂, The shaft member 1 and the striker 3 are united as A together because there is no member that restrains the striker 3 in this direction.₁Rotate in the direction.
[0035]
By the way, as shown in FIGS. 2 and 4, the piece 4 rotatably supported by the support pin 5 is loosely inserted into the bottomed hole 402 of the piece 4 and the contact guide surface of the stopper member 8. The spring force of the elastic compression spring 6 is always acting between the holding pin 7 for the piece in contact with 801 and the bottom of the bottomed hole 402, that is, the piece 4.
[0036]
Therefore, unless a special mechanical external force is applied to the piece 4 supported so as to be rotatable about the support pin 5, as shown in FIG. 5A, for example, the piece 4 has the first member of the stopper member 8. The state of being in contact with the contact surface 802 is maintained.
[0037]
Now, from the state shown in FIG.₂As shown in FIG. 5 (B), the tip of the striker 3 is engaged with the recessed notch 401 opened on the shaft member side of the piece 4 as shown in FIG.
[0038]
Thereafter, the shaft member 1 is further moved to the point O.₂When the striker 3 engaged with the notch 401 of the piece 4 is in contact with the notch 401, the point O_ThreeThe piece 4 is mechanically rotated clockwise about the rotation center.
That is, by the rotation of the striker 3, the piece 4 is switched from the state shown in FIG. 5A to the state shown in FIG. 5C.
[0039]
Thus, point O₂As the striker 3 rotates counterclockwise about the frame, the piece 4 moves to the point O._ThreeAnd the piece 4 is brought into contact with the second contact surface 803 of the stopper member 8.
[0040]
Of course, as described above, since the spring force of the compression spring 6 mounted on the piece 4 is always acting between the piece holding pin 7 and the piece 4 which are in contact with the contact guide surface 801 of the stopper member 8, the support pin Unless a special mechanical external force is applied to the piece 4 supported so as to be pivotable about the piece 5, the piece 4 contacts the second abutting surface 803 of the stopper member 8 as shown in FIG. Maintained in contact.
[0041]
As described above, after the striker 3 is rotated so that the piece 4 comes into contact with the second contact surface 803 of the stopper member 8, the shaft member 1 and the striker 3 are further moved to the point O.₂, The striker 3 comes into contact with the piece 4 positioned in contact with the second contact surface 803 of the stopper member 8 as shown in FIG. 5D. Point O₂The rotation of the shaft member 1 around the rotation center in the counterclockwise direction is restricted.
[0042]
As described above, the shaft member 1 has the point O from the state shown in FIG. 5 (A) to the state shown in FIG. 5 (D).₂Is rotated counterclockwise near 720 degrees, for example, 710 degrees.
[0043]
Of course, from the state shown in FIG.₂When the shaft member 1 is rotated clockwise about the rotation center, the shaft member 1 is substantially rotated through the states of FIGS. 5C and 5B to the state of FIG. 5A.
[0044]
That is, when the piece 4 is in contact with the stopper member 8, the striker 3 is in contact with the piece 4 and relative rotation is performed in the direction in which the contact state between the piece 4 and the stopper member 8 is strengthened. With respect to the direction in which the contact state between the piece 4 and the stopper member 8 is released, the striker 3 is engaged with the recessed notch 401 of the piece 4 so that the piece 4 and the striker 3 are relatively It is rotated.
[0045]
As described above, the shaft member 1 has a point O within the rotation range restricted to, for example, 710 degrees between the state shown in FIG. 5A and the state shown in FIG.₂Is rotated around the center of rotation.
[0046]
As described above, since the spring force of the compression spring 6 mounted between the piece holding pin 7 and the piece 4 that contacts the contact guide surface 801 of the stopper member 8 is constantly acting, Unless a special mechanical external force is applied to the piece 4 supported so as to be rotatable about the pin 5, the piece 4 abuts on either the first or second abutment surface 802 or 803 of the stopper member 8. Maintained in a state.
[0047]
In this case, as shown in FIG. 6, when the piece 4 is in contact with the first contact surface 802 of the stopper member 8, the contact point 801A of the contact holding surface 801 of the piece holding pin 7 and the stopper member 8 is provided. And the contact point 801B of the contact guide surface 801 of the stopper member 8 when the piece 4 is in contact with the second contact surface 803 of the stopper member 8 is a flat surface. Can do.
[0048]
That is, when the piece 4 is about to rotate about the support pin 5, the piece holding pin 7 that comes into contact with the contact guide surface 801 as the piece 4 turns is provided with a bottomed hole 402 in the piece 4. The position is displaced to the inside.
[0049]
Thus, if the piece 4 tries to rotate around the support pin 5, the holding force for the piece 7 is displaced inside the piece 4, and the spring force of the compression spring 6 increases. For this reason, the positioning state of the piece 4 by the compression spring 6 is further strengthened than before the rotation of the piece 4.
[0050]
Of course, as shown in FIG. 2, if the intermediate portion of the contact guide surface 801 of the stopper member 8 that prevents the piece holding pin 7 from being pulled out is curved toward the support pin 5, the piece 4 is supported by the support pin 5. The position of the piece holding pin 7 to be pushed into the piece 4 along the contact guide surface 801 curved toward the support pin 5 as the piece 4 is turned. The amount of displacement increases.
[0051]
That is, since the spring force of the compression spring when the piece 4 rotates about the support pin 5 becomes larger than that shown in FIG. 6, the piece 4 by the compression spring 6 and the first or second of the stopper member 8 The positioning state with any of the second contact surfaces 802 and 803 is strengthened.
[0052]
As described above, in the swivel device according to the present invention, unless a special mechanical external force is applied to the piece 4 that is rotatably supported around the support pin 5, the piece 4 is a spring force of the compression spring 6. While being urged by the stopper member 8, the stopper member 8 is kept in contact with either the first or second contact surface 802 or 803.
[0053]
Therefore, if the swivel device according to the present invention is applied to the wrist portion of an industrial robot, even if the wrist portion is moved to a free posture such as a vertical state or a horizontal state, the wrist portion cannot be expected when the robot is further operated. Even if an inertial force is applied, the position of the movable part of the wrist can be regulated within a desired rotation range.
[0054]
In addition, this invention is applied when a shaft member and a housing member rotate relatively. Of course, the present invention can also be applied to the case where both the shaft member and the housing member are rotated.
[0055]
Furthermore, although it is suitable as a wrist part of a robot, it is needless to say that the present invention can be applied to an appropriate mechanical device provided with a rotating part that restricts the position to a desired rotation range.
[0056]
【The invention's effect】
As is clear from the above description, in the swivel device according to the present invention that is used by relatively rotating the shaft member and the housing member, the striker is provided on the shaft member so as to project in the radial direction of the shaft member. A piece pivotally supported by the housing member via a support pin parallel to the long axis of the shaft member outside the striker, and opening in a radial direction of the shaft member on the shaft member side of the piece And a bottomed hole that opens outwardly in the radial direction of the shaft member, and is inserted into the bottomed hole and is removed via a compression spring. And a contact guide surface that prevents the retaining pin from being pulled out against the spring force, and each of the pieces has a predetermined amount in both directions around the support pin as a rotation center. A stopper member that contacts the piece when tilted is provided. Therefore, when the piece is in contact with the stopper member, the striker is in contact with the piece to prevent relative rotation in the direction in which the contact state between the piece and the stopper member is strengthened. With respect to the direction in which the contact state with the member is released, the striker is engaged with the notched portion in which the piece is depressed, and the piece and the striker are relatively rotated.
[0057]
Of course, in the swivel device according to the present invention, the piece 4 is urged by the spring force of the compression spring 6 unless a special mechanical external force is applied to the piece 4 supported so as to be rotatable about the support pin 5. However, the stopper member 8 is maintained in contact with either the first or second contact surface 802, 803.
[0058]
Therefore, if the swivel device according to the present invention is applied to the wrist portion of an industrial robot, even if the wrist portion is moved to a free posture such as a vertical state or a horizontal state, the wrist portion cannot be expected when the robot is further operated. Even if an inertial force is applied, the position of the movable part of the wrist can be regulated within a desired rotation range.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an industrial robot as an object of the present invention.
2 is a diagram showing a main part of an embodiment of the present invention, and is a view corresponding to II-II line in FIG.
FIG. 3 is a side view of FIG.
FIG. 4 is a view taken along line IV-IV in FIG.
FIG. 5 is a plan view for explaining the operation of the present invention.
6 is a modification of the main part of FIG.
FIG. 7 is a schematic front view showing a main part of a conventional example.
FIG. 8 is a plan view of FIG.
FIG. 9 is an operation explanatory diagram of a conventional example.
FIG. 10 is an operation explanatory diagram of a conventional example.
FIG. 11 is an operation explanatory diagram of a conventional example.
FIG. 12 is a detailed operation explanatory diagram of a conventional example.
[Explanation of symbols]
1 Shaft member
2 Housing member
3 striker
4 pieces
5 Support pins
6 Compression spring
7 retaining pins
8 Stopper member
401 Notch recessed on striker side of piece
402 Bottomed hole opening in the radial direction
801 Contact guide surface
802 First contact surface
802 Second contact surface

Claims (2)

In the shaft member (1) and the housing member (2) and turning device for relatively rotating the,
A striker (3) provided protruding in the radial direction of the shaft member (1) ;
On the outside of the striker (3) , a support pin (5) parallel to the long axis of the shaft member is rotatably supported by the housing member (2), and a notch (401) is formed at the base end. Piece (4) ,
The frame (4) frames holding pins that are pushed out outward by the spring force of the compression spring (6) inserted into the tip of the bottomed hole (402) provided the hole (402) (7) When,
Contact surfaces (802, 803) formed in a U-shape and abutting with the base end of the piece (4) are formed in the U-shaped opening so as to contact the U-shaped bottom. contact surface of the piece (4) of the proximal end the stopper member when said guide surface (801) is formed frame (4) is rotated as a rotation about the support pin (5) (8) rotation of (802 or 803) to be abutted against the end portion of the abutment guide surface tip portion is pushed by the spring force of abutting the frame holding pin (7) (801) said piece (4) and a stopper member (8) attached to said housing member and Ru is stopped (2),
The base end portion of the piece (4) is brought into contact with one contact surface (802 or 803) of the stopper member (8), and the distal end portion of the piece holding pin (7) is pushed out by the spring force. When abutting against one end of the abutting guide surface (801), the base end of the piece (4) is further pressed against one abutting surface (802 or 803) of the stopper member (8). When the shaft member (1) and the housing member (2) are rotated relative to each other in the direction, the rotation of the piece (4) is prevented and the shaft member (1) and the housing member (2) Relative rotation is prevented,
The shaft member (1) and the housing member (2) are relatively rotated in a direction in which the base end portion of the piece (4) is separated from the one contact surface (802 or 803) of the stopper member (8). It said striker (3) said frame (4) tip the abutment guide face of the notch on (401) to catch in the frame (4) by rotating the piece holding pin (7) when to It moves from one end of (801) to the other end and is pushed out by the spring force to come into contact with the other end of the contact guide surface (801) to stop the rotation of the piece (4). And
When the striker (3) moves away from the piece (4) and relatively rotates the shaft member (1) and the housing member (2), the tip of the holding pin (7) for the piece is the spring. A turning device characterized in that the rotation of the piece (4) is stopped while maintaining the state of being pushed out by force and in contact with the other end of the contact guide surface (801) . The turning guide device according to claim 1 , wherein the contact guide surface (801) of the stopper member (8) has a middle portion curved toward the support pin (5) .

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