JP4036523B2 - Positioning device for relative movement mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for positioning between a pair of members in a relative movement mechanism that relatively moves a pair of members by a driving unit.
[0002]
[Prior art]
14 and 15 show a positioning device used in a conventional rotational relative movement mechanism. This relative movement mechanism rotates a disk-shaped movable member 2 rotatably supported around a fulcrum a with respect to a fixed side member 1 such as a base frame by driving means such as an electric motor (not shown). The fixed member 1 is equipped with a first stopper 3 for stopping at a predetermined position near the outer periphery of the movable member 2, and the movable member 2 is clockwise in FIG. Detecting means 5 is provided for detecting that the first stopper 3 has been rotated to a predetermined position when the first stopper 3 is rotated to a predetermined position and stopping the rotation of the movable member 2.
[0003]
The detection means 5 includes a detection arm 7 pivotally supported around a fulcrum b on a boss 6 provided on the fixed-side member 1 so as to interfere with the rotation locus of the first stopper 3, A switch 8 for detecting the rotation of the support shaft 7a is provided. Then, when the movable member 2 is driven and rotated clockwise in the drawing and the first stopper 3 abuts and swings the detection arm 7, this is detected by the switch 8 and the clockwise rotation of the movable member 2 is detected. The movement is stopped.
[0004]
In the above configuration, for example, when the mechanism is inspected and maintained, it may be desired to rotate the rotating member 2 to a position beyond a predetermined stop position set by the first stopper 3 to stop. . In such a case, conventionally, the first stopper 3 used for stopping at a fixed position is moved from the desired moving direction to a further outer position (position beyond a predetermined stop position) P, or In addition to the first stopper 3 for stopping at a fixed position, a second stopper is mounted for stopping at the outer position, and when it is desired to rotate to the outer position P, the first stopper 3 is removed. Measures were taken.
[0005]
[Problems to be solved by the invention]
However, in order to change the stop position in the above-described conventional configuration, it takes time to move and remove the first stopper 3 for stopping at a fixed position, and the first stopper removed or moved is removed. When fixing 3 to the original position, it was necessary to perform alignment, which was troublesome.
[0006]
The present invention has been made paying attention to such points, and can easily and quickly switch between a fixed position stop state and a stop state outside the fixed position stop state, and a stopper when returning to the fixed position stop state. The main purpose is to make it possible to accurately perform positioning.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, the first stopper is provided on one of the members relatively moved by the driving means, and the detection means detects the contact of the first stopper with the other member. A positioning device for a relative movement mechanism configured to stop the driving means based on a contact detection operation of the detection means, wherein the relative movement of the one member with respect to the first stopper A second stopper that is arranged along the direction and is abutted by a movement in the same direction as the moving direction in which the first stopper is close to the detection means; and the first stopper is a relative movement mechanism. the abutment can be a normal position relative to the sensing means during operation, is at the non-operation time of the inspection or the like of the relative movement mechanism and the displacement drive means for exiting retreat displacement over a standby position where it does not abut the first stopper In terms of the pivotally supported to the movable portion of the position drive means, along a state in which the first stopper is located between the sensing means and the second stopper in a direction in which the first stopper proximate to the sensing means when to mutually abut each other moving Te, while maintaining the contacting posture of the first stop for the first blocking to detection means the rotation of the stopper, the second stopper is in contact with sensing means those When the first stopper and the detecting means come into contact with each other after the first stopper has moved from the position where the first stopper has passed through the direction opposite to the approaching direction, the first stopper is rotated. Posture control means for permitting movement and releasing the contact posture of the first stopper with respect to the detection means.
[0008]
According to a second aspect of the present invention, there is provided a positioning device for a relative movement mechanism according to the first aspect of the present invention, wherein the driving means relatively rotates both the members.
[0009]
A third aspect of the present invention is the relative movement mechanism positioning device according to the first aspect of the present invention, wherein the drive means moves the both members relatively linearly.
[0010]
The invention according to claim 4 is the relative movement mechanism positioning device according to any one of claims 1 to 3, wherein the displacement driving means advances the first stopper to the normal position by the biasing force of the elastic body. On the other hand, the first stopper is moved back to the standby position against the biasing force of the elastic body by the excitation operation of the electromagnetic solenoid.
[0011]
According to a fifth aspect of the present invention, there is provided a relative movement mechanism positioning device according to any one of the first to fourth aspects, wherein a sliding material is provided on a sliding surface for moving the first stopper by a displacement movement mechanism. It is characterized by applying a coating.
[0012]
A sixth aspect of the present invention is a positioning device for a relative movement mechanism according to any one of the first to fifth aspects, wherein the driving means relatively moves the both members relatively, and the positioning device. Are provided at both end positions of the repetitive movement of the relative movement mechanism.
[0013]
According to the configuration of the first, second, and third aspects, when the first stopper is advanced to the normal position by the displacement driving means during operation of the relative movement mechanism , the normal positioning by the contact between the first stopper and the detecting means is performed. The action can be performed. On the other hand, when the first stopper is retracted to the standby position by the displacement driving means when the relative movement mechanism is not in operation or the like , positioning at a position outside the normal position by contact between the second stopper and the detecting means is performed. The action can be performed. Further, the normal positioning operation is performed along the normal detection operation direction (the direction in which the first stopper and the detection unit are close to each other from the state where the first stopper is positioned between the detection unit and the second stopper). When performing, since the attitude | position control means prevents the rotation of a 1st stopper and maintains the contact attitude | position, normal positioning operation | movement can be performed without a problem using a 1st stopper. On the other hand, when the two members are relatively moved along the normal detection operation direction more than the normal operation and further moved to the original position along the opposite direction, the posture control means is In order to allow the rotation of the first stopper and release the contact posture, the two members are relatively moved to the original position without driving the displacement driving means to move the first stopper to the standby position. be able to. Moreover, since the posture control operation of the first stopper by such posture control means is performed by controlling the rotation of the first stopper, the posture control operation can be performed smoothly.
[0014]
According to the configuration of the fourth aspect, the first stopper that is used at the normal position for most of the time is held at the normal position by the elastic body, and only when the first stopper is moved to the standby position with less frequency. The electromagnetic solenoid in the displacement driving means is energized.
[0015]
According to the configuration of claim 5, the frequency of the first stopper withdrawing / withdrawing movement is usually low, and the time interval between the previous withdrawal operation and the subsequent withdrawal operation is increased in many cases, On the sliding surface of the first stopper coated with the slipping material, no sticking occurs between the sliding surface and the first stopper even if there is a time interval before and after the withdrawal operation. .
[0016]
According to the structure of Claim 6, the effect | action of Claims 1-6 can be exhibited in the repeated movement both-ends position of a relative movement mechanism.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 and 2 are a plan view and a perspective view of a positioning device when the present invention is applied to a rotary relative movement mechanism.
[0018]
This relative movement mechanism rotates a disk-shaped movable member 2 rotatably supported around a fulcrum a with respect to a fixed side member 1 such as a base frame by driving means such as an electric motor (not shown). The first stopper 3 for stopping at a fixed position at a predetermined position near the outer periphery of the movable member 2 and the relative movement between the solid side member 1 and the movable member 2 from the first stopper 3. A second stopper 4 that allows a large amount is provided. The stationary member 1 detects that the first and second stoppers 3 and 4 are rotated to a predetermined position when the movable member 2 is rotated in the clockwise direction in FIG. A detection means 5 for stopping the dynamic drive is provided.
[0019]
The detection means 5 is provided around the fulcrum b with respect to the boss 6 (provided so as to interfere with the rotation trajectory of the first stopper 3 and the second stopper 4) provided in the stationary member 1. And a switch 8 for detecting the rotation of the support shaft 7a. The movable member 2 is driven to rotate in the clockwise direction in FIG. When the two stoppers 3 and 4 abut and swing the detection arm 7, this is detected by the switch 8, and the clockwise rotation of the movable member 2 is stopped. The contact swing of the detection arm 7 is regulated by contact with the contact surface 9 provided on the fixed side member 1.
[0020]
A detailed structure for supporting the first and second stoppers 3 and 4 on the movable member 2 is shown in FIGS.
[0021]
On the upper surface near the outer periphery of the disc-shaped movable member 2, a dovetail-shaped dovetail groove 10 is formed in an annular shape, and a predetermined position in the circumferential direction of the dovetail groove 10 is provided via a crotch 11 and a bolt 12. A thick plate-like support base 13 is fastened and fixed. The support base 13 is attached to the movable member 2 in a fixed posture by being engaged with a positioning step portion 11 a formed in the crotch 11.
[0022]
A straight dovetail groove 14 is formed on the upper surface of the support base 13 along the radial direction with respect to the rotation fulcrum a of the movable member 2, and the support member 15 is slidably moved along the dovetail groove 14. The first stopper 3 is loosely fitted around the fulcrum c on the fulcrum shaft 16 erected and fixed on the upper surface of the support member 15. Although not shown, the inner surface of the dovetail groove 14 is dry-coated with a lubricious material such as molybdenum disulfide (MoS ₂ ), and the support member 15 is difficult to adhere to the dovetail groove 14 over time. It has become. Thereby, the support member 15 can be slid without being fixed to the dovetail groove 14 even if it passes for a long time. Lubrication may be ensured by applying grease or the like to the dovetail groove 14 instead of coating the slipping material.
[0023]
A recess 17 surrounding the fulcrum shaft 16 is formed on the lower surface of the first stopper 3, and a torsion spring 18 externally fitted to the fulcrum shaft 16 is accommodated in the recess 17. One end of the torsion spring 18 is engaged with a spring receiving pin 19 implanted on the upper surface of the support member 15, and the other end of the torsion spring 18 is engaged with a spring receiving pin 20 implanted downward in the first stopper 3. The first stopper 3 is always subjected to a counterclockwise rotation biasing force. The first stopper 3 that is urged to rotate is brought into contact with and supported by a stopper pin 21 that protrudes from the upper surface of the support member 15, so that the first stopper 3 is formed on one side surface of the first stopper 3. The contact surface 3a is held in a posture along the radial direction with respect to the rotation fulcrum a of the movable member 2, and the first stopper 3 is allowed to rotate clockwise against the rotation urging force. It is like that.
[0024]
In addition, the positioning device moves the first stopper 3 between a normal position where the first stopper 3 can be brought into contact with the detection arm 7 of the detection means and a standby position where the first stop 3 is not in contact with the slide movement of the support member 15. Drive means 22 is provided. That is, the electromagnetic solenoid 24 is provided on the upper surface of the movable member 2 via the bracket 23, and the plunger 24a is connected to the end of the support member 15 via the pin 25, and the plunger 24a is connected to the return for recovery. A coil spring 26 is externally fitted.
[0025]
The electromagnetic solenoid 24 is configured to retract and drive the plunger 24 a by energization excitation. In a non-energized state, the plunger 24 a is biased and projected by the coil spring 26, and a spring receiving washer 27 fixed to the plunger 24 a is provided on the support base 13. The first stopper 3 is held at the regular position by the support member 15 being advanced until it comes into contact with the end surface. In addition, the electromagnetic solenoid 24 is energized and energized to drive the plunger 24a against the coil spring 26 so as to retract the first stopper 3 to the standby position.
[0026]
Further, as shown in FIG. 4, the second stopper 4 is configured in an L shape having an abutting surface 4 a having the same height as the abutting surface 3 a of the first stopper 3. It is fastened and fixed to the dovetail groove 10.
[0027]
In the present embodiment, the supporting member 15, the fulcrum shaft 16, the torsion spring 18, the spring receiving pins 19 and 20, and the stopper pin 21 constitute an attitude control means.
[0028]
The positioning device according to the present invention is configured as described above, and the operation thereof will be described below with reference to FIGS.
[0029]
(A) In the normal fixed position stop operation state, as shown in FIG. 9, the first stopper 3 is advanced to the normal position and is positioned on the upper side of the rotation than the detection means 5. At this time, the first stopper 3 is located between the detection arm 7 and the second stopper 4. Then, the movable member 2 rotates in the clockwise direction X and moves to a position where the first stopper 3 contacts the detection arm 7 of the detection means 5 (hereinafter, this position is referred to as a first fixed position). By acting on the first stopper 3, the driving of the movable member 2 is cut off, and the movable member 2 is stopped at a fixed position.
[0030]
(B) When it is desired to rotate the movable member 2 to a position where the first stopper 3 exceeds the first fixed position for inspection and maintenance, as shown in FIG. The electromagnetic solenoid 24 is energized to move the first stopper 3 together with the support member 15 from the normal position to the standby position.
[0031]
(C) Next, when the movable member 2 is further rotated in the clockwise direction X beyond the first fixed position while the first stopper 3 is held at the standby position, as shown in FIG. The second stopper 4 abuts against the detection arm 7 of the detection means 5, and the movable member 2 is stopped at this position (hereinafter, this position is referred to as a second fixed position).
[0032]
(D) When the movable member 2 is stopped at the second fixed position, the energization to the electromagnetic solenoid 24 is immediately stopped, and the first stopper 3 is moved from the standby position to the normal position by the spring biasing force. In this state, desired maintenance and inspection work is performed. Thus, in this positioning device, it is only necessary to energize the electromagnetic solenoid 24 until the first stopper 3 passes the detecting means 5 and to retract the first stopper 3 to the standby position.
[0033]
(E) When the maintenance / inspection work or the like is finished, when the movable member 2 is rotated in the reverse direction (counterclockwise in the figure) Y, first, as shown in FIG. It contacts the detection arm 7 of the detection means 5 from the reverse direction.
[0034]
(F) In this case, the first stopper 3 is allowed to rotate backward in the clockwise direction, and the rotational biasing force of the first stopper 3 is set smaller than the return operation force of the detection arm 7. Therefore, as shown in FIG. 13, the first stopper 3 passes through the detection means 5 in the reverse direction while rotating backward by contact with the detection arm 7. In order to reduce the amount of backward rotation of the first stopper 3 when passing through the detection arm 7, an inclined relief surface 3 b is formed on the rear surface of the distal end portion of the first stopper 3.
[0035]
(G) When the first stopper 3 passes the detecting means 5 in the reverse direction, the first stopper 3 is rotated until it is received by the stopper pin 21 by the counterclockwise rotation biasing force, The operation again returns to the first fixed position stop operation state shown in FIG.
[0036]
The present invention can also be implemented in the following forms.
[0037]
(1) Instead of the electromagnetic solenoid 24 of the displacement driving means 22, an air cylinder can be used. In this case, the piston rod is retracted against the return spring by supplying pressurized air to the air cylinder, so that the first stopper 3 is retracted to the standby position, and the first air is released by releasing the pressurized air supply. One stopper 3 may be moved forward to the normal position.
[0038]
(2) As the displacement driving means 22 for moving the first stopper 3 back and forth between the normal position and the standby position, it is possible to adopt a screw feed system or a rack and pinion feed system using an electric motor capable of forward and reverse rotation. is there.
[0039]
(3) The first stopper 3 can be linearly slid back by contact with the detection arm 7.
[0040]
(4) In the embodiment, the first stopper 3 for detecting the first fixed position and the second stopper 4 for detecting the second fixed position are provided on the movable member 2 side, and the detecting means 5 is provided. The case where the fixed side member 1 is equipped is illustrated, but conversely, the detection means 5 can be equipped on the movable member 2 side, and the first and second stoppers 3 and 4 can be equipped on the fixed side member 1. It is.
[0041]
(5) The present invention can also be applied to a structure in which both members linearly move relative to each other.
[0042]
(6) In a relative movement mechanism that relatively repeatedly moves both members, the positioning device of the present invention can be provided at both end positions of the repeated movement. By doing so, it is possible to perform positioning at two positions, that is, a fixed position and an auxiliary position, at both end positions of the repetitive movement.
[0043]
【The invention's effect】
As is clear from the above description, the following effects can be obtained according to the present invention.
According to the first, second, and third aspects of the invention, the normal positioning operation and the positioning operation at a position outside the normal positioning operation are performed without moving or removing the first stopper to the outer position. Therefore, it is now possible to quickly prepare for inspection and maintenance and return to the original state without troublesome operations.
[0044]
Further, since the first stopper can be accurately set to the original position in the return state, the first stopper can be always made to perform a regular fixed position stop with high accuracy.
[0045]
Furthermore, when the first stopper and the detecting means move relative to each other in the opposite direction, the contact posture of the first stopper is released smoothly by rotation, and the relative movement between the two is allowed. The resetting function of the stopper can be always and satisfactorily exhibited without driving the displacement driving means.
[0046]
According to the fourth aspect of the present invention, the displacement driving means for moving the first stopper can be simply constructed, and the electromagnetic solenoid is energized only when the first stopper is moved to the standby position. Since time is not energized, the electromagnetic solenoid can be operated satisfactorily for a long time.
[0047]
According to the fifth aspect of the invention, it is possible to prevent the first stopper from being fixed on the sliding surface and to cause an operation failure, and to smoothly perform the operation with less frequency of moving the first stopper to the standby position. Can be made to do.
[0048]
According to the invention of claim 6, since the two positions of the fixed position and the position outside the position can be determined at each of the both end positions of the repetitive movement, the positioning can be finely controlled correspondingly, and the usability is improved. Improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing a positioning device for a relative movement mechanism according to an embodiment of the present invention.
FIG. 2 is a perspective view of a positioning device for a relative movement mechanism according to the embodiment.
FIG. 3 is a partial sectional side view showing a first stopper and detection means.
FIG. 4 is a longitudinal side view showing a mounting structure of a second stopper.
FIG. 5 is a cross-sectional plan view showing a first stopper mounting structure.
FIG. 6 is a longitudinal side view showing a mounting structure of a first stopper.
FIG. 7 is a longitudinal sectional side view showing a mounting structure of a first stopper.
FIG. 8 is a longitudinal sectional front view showing a mounting structure of a first stopper and a second stopper.
FIG. 9 is a plan view showing a state in which a fixed position stop works.
FIG. 10 is a plan view of the first stopper in a retracted state.
FIG. 11 is a plan view showing a state in which a position stop is detected by a second stopper.
FIG. 12 is a plan view showing a halfway of the return operation from the stop position at the second stopper.
FIG. 13 is a plan view showing a state where the first stopper returns through the detection means.
FIG. 14 is a plan view showing a conventional positioning device.
FIG. 15 is a side view in which a part of a main part of a conventional positioning device is cut away.
[Explanation of symbols]
1 One member (fixed side member)
2 The other member (movable member)
3 First stopper 4 Second stopper 5 Detection means 15 Stopper support member 22 Displacement drive means 24 Electromagnetic solenoid 26 Spring

Claims (6)

A first stopper is provided on one of the members relatively moved by the drive means, and a detection means for detecting contact with the first stopper is provided on the other member, and contact detection of the detection means. A positioning device for a relative movement mechanism configured to stop the driving means based on operation,
The one member is disposed so as to be spaced apart from the first stopper along the relative movement direction thereof, and abuts against the detection means by movement in the same direction as the movement direction in which the first stopper approaches. A second stopper;
Displacement drive for moving the first stopper back and forth between a normal position where the first stopper can be brought into contact with the detecting means when the relative movement mechanism is in operation and a standby position where the first stopper is not in contact when the relative movement mechanism is not in operation. Means,
The first stopper is detected from a state in which the first stopper is positioned between the detecting means and the second stopper after the first stopper is pivotally supported on the movable part of the displacement driving means. When moving along the direction approaching the means and abutting each other, the rotation of the first stopper is prevented to maintain the contact posture of the first stopper with respect to the detection means, while the second stopper There upon the first stopper to the direction in which the near from a position which has passed through the sensing means to the first stopper to move along the opposite direction and detecting means adjoining those after contact sensing means those in Attitude control means for allowing rotation of the first stopper and releasing the contact attitude of the first stopper with respect to the detection means;
A positioning device for a relative movement mechanism. A positioning device for a relative movement mechanism according to claim 1,
A positioning device for a relative movement mechanism, wherein the driving means is configured to relatively rotate both the members. A positioning device for a relative movement mechanism according to claim 1,
A positioning device for a relative movement mechanism, wherein the driving means is for moving the both members relatively linearly. A positioning device for a relative movement mechanism according to any one of claims 1 to 3,
The displacement driving means moves the first stopper to the normal position by the biasing force of the elastic body, and retracts the first stopper to the standby position against the biasing force of the elastic body by the excitation operation of the electromagnetic solenoid. A positioning device for a relative movement mechanism, characterized by being moved. A positioning device for a relative movement mechanism according to any one of claims 1 to 4,
A positioning device for a relative movement mechanism, characterized in that a sliding surface on which the first stopper is moved back and forth by the displacement driving means is coated with a sliding material. A positioning device for a relative movement mechanism according to any one of claims 1 to 5,
A positioning device for a relative movement mechanism, wherein the driving means is configured to relatively move the both members relatively, and the positioning device is provided at both end positions of the relative movement mechanism.

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