JP3599715B2 - Stopping mechanism and rotary table having this stopping mechanism - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stop mechanism and a rotary table having the stop mechanism, and more particularly, to a stop mechanism capable of surely and quickly stopping a moving body and a rotating body, and a rotary table having the stop mechanism.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a precision measuring device, a grinding device, and the like usually include a fixing tool corresponding to the device. For example, when the surface or contour of a machined workpiece is measured with a laser beam or the like and another workpiece is ground with the same dimensions as the workpiece, the first workpiece is fixed to a measuring device. Fixing tools are required.
[0003]
In addition, a device for measuring the physical properties of an article or measuring the material of the article also requires a tool for fixing the measured object to the measuring device.
As such a tool, a circular table is known. As shown in FIG. 17, the rotary table rotatably supports a turntable 2 on a block body 1, and performs measurement and grinding by fixing a target member to the disk.
[0004]
By the way, when the target member is accurately measured or ground with the rotary table 3, not only the rotating disk 2 is simply stopped and fixed, but also a precise regulation of the rotation stop position may be required. Conventionally, the brake shoe is brought into contact with the shaft of the rotating disk to stop it, or the engaging member 5 is engaged with the gear 4 provided on the shaft of the rotating disk 2 as shown in FIG. In general, such an operation has been performed (for example, Japanese Patent Application Laid-Open No. 10-217055).
[0005]
[Problems to be solved by the invention]
However, with the former brake shoe, there is a time gap from when the brake is operated to when the brake is effective, so that the higher the rotation speed, the more difficult it is to control to stop at an accurate position. .
[0006]
On the other hand, since the latter gear 4 and the engaging member 5 stop the rotation at the moment of engagement, the stop position can be accurately controlled even if the rotation is fast, but the stop position is determined by the pitch of the gear 2. As a result, there is a problem that the rotation cannot be stopped steplessly.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to develop a stop mechanism which can instantaneously stop both forward and reverse rotations and has a simple structure, and a rotary table having this stop mechanism.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, a stop mechanism according to claim 1 is provided on a fixed body, a movable body supported at a fixed parallel interval with respect to the fixed body surface and relatively movable, and provided on the fixed body surface. A pair of inclined surfaces inclined in opposite directions along the moving direction of the moving body, a pair of floating stoppers having a circular cross section arranged corresponding to the pair of inclined surfaces, and the pair of stoppers And urging means for urging the floating stoppers in opposite directions, and moving means for simultaneously moving the floating stopper in the opposite direction against the urging force of the urging means.
[0009]
Therefore, according to this stop mechanism, when the floating stopper is urged by the urging means in a direction that allows the movement of the moving body, the moving stopper bites between the moving body and the fixed body by the moving means. In this case, since the two inclined surfaces are inclined in opposite directions to each other, even if the moving body moves in either direction, one of the floating stoppers exerts a stop function. With one stop operation, the movement in either the forward or reverse direction can be immediately stopped.
[0010]
If the urging direction of the urging means with respect to the floating stopper is the direction in which the movement of the moving body is stopped, the movement of the moving body is allowed by the engagement of the moving means with the floating stopper.
[0011]
According to a second aspect of the present invention, there is provided the stopping mechanism, wherein the moving body is a rotating shaft, and the fixed body is a block member provided with a circumferential hole for receiving the rotating shaft. A rod supported by the block and reciprocally movable in the radial direction of the rotating shaft with respect to the rotating shaft.
[0012]
Therefore, regardless of the direction of rotation of the rotating shaft, the rotation of the rotating body can be immediately stopped or started only by the reciprocating operation of the rod.
A third aspect of the present invention relates to the rotary table having the stopping mechanism according to the first aspect, comprising a base table attachable to a measuring device, a machine tool, or the like, and a rotating plate rotatably supported by the base table. A circular table, a concave portion along a circumferential direction formed between a rotation axis of the rotary plate and an inner surface of a shaft hole of the table that receives the rotation axis, and a circular surface formed on an inner surface of the shaft hole side. An inner surface deformed portion formed so as to change the radial width of the circumferential concave portion in an inclined manner, wherein a pair of two inner surface deformed portions whose change directions are opposite to each other, A pair of a pair of floating stoppers having a circular cross section housed and accommodated in the circumferential recess corresponding to the inner surface deformed portion, an elastic member for resiliently urging the floating stoppers in opposite directions, and Simultaneously move the floating stopper in the direction opposite to the biasing direction. It is obtained by a push rod to be.
[0013]
The rotation and stop control of the rotary table, which requires accurate rotation and braking motion, can be controlled with a very simple device.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
(First Embodiment)
FIG. 1 is a cross-sectional view of a stop mechanism according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is an operation explanatory cross-section of the stop mechanism of the first embodiment. FIG.
[0015]
In FIG. 1, reference numeral 10 denotes a movable body capable of reciprocating parallel movement as indicated by an arrow X. The movable body is mainly a metal plate made of steel or the like, and is similarly slid on a fixed body 11 made of a metal base made of steel or the like. It is movably supported. The slidable support structure is such that a protrusion 10a formed on the moving body 10 is fitted into a guide groove 11a formed on the fixed body 11 as shown in FIG. It does not move, but can freely reciprocate in a direction along the guide groove 11a (a direction perpendicular to the plane of the drawing).
[0016]
A concave portion 13 is provided on the surface of the fixed body 11, and the pair of two floating stoppers 12 having a circular cross section are received in the concave portion 13.
The floating stopper 12 is a steel ball, or a columnar steel rod having a fixed length L as shown in FIG.
[0017]
The depth of the recess 13 is tapered so as to be a portion 13 a having a depth that does not touch the moving body 10 in a state where the floating stopper 12 is received, and a depth at which the floating stopper 12 comes into contact with the moving body 10. An inclined surface 14 is provided, and two inclined surfaces 14, 14 are provided at symmetrical positions in the recess 13 so that the inclination directions are opposite to each other. In the case of the illustrated example, the recess 13 is formed to be higher toward the center in the length direction.
[0018]
The two floating stoppers 12, 12 are arranged so as to correspond to the inclined surfaces 14, 14, respectively, and are urged in opposite directions by elastic members 15, 15, such as helical springs. The floating stoppers 12, 12 are urged by the elastic members 15, 15 toward the inclined surfaces 14, 14.
[0019]
A moving means 16 for urging the two floating stoppers 12 in opposite directions against the elasticity of the elastic member 15 reciprocates between the two floating stoppers 12 in the surface direction of the fixed body 11. It is provided freely.
[0020]
The moving means 16 includes a projection 17 which is inserted into a through hole 19 formed in an intermediate portion between the inclined surfaces 14 and 14 and which fits between the two floating stoppers 12 and 12 to forcibly widen a mutual interval. It has a rod portion 18 for supporting the portion 17, and a driving device (not shown) for reciprocatingly urging the rod portion 18 is connected to the rod portion 18.
[0021]
Next, the operation of the stop mechanism of this embodiment will be described.
When the moving body 10 is freely reciprocated as shown in FIG. 1, the protrusion 17 of the moving means 16 protrudes from the through hole 19 toward the moving body 10, and the space between the two floating stoppers 12, 12 is formed by the protrusion 17. Spread out.
[0022]
Therefore, the two floating stoppers 12 are both pushed toward the bases of the inclined surfaces 14, 14, and the floating stoppers 12 are in a loose fit state with a gap with the moving body 10 in the concave portion 13. Moves freely on the fixed body 11.
[0023]
When it is necessary to stop, the protrusion 17 of the moving means 16 is drawn into the through hole 19 of the fixed body 11 as shown in FIG.
Then, the floating stopper 12 is pushed by the elastic member 15 and immediately pushed toward the tops of the inclined surfaces 14, 14. When the moving body 10 is moving in the direction of the arrow X <b> 1, the floating When the stopper 12 and the moving body 10 are moving in the arrow X2 direction, the floating stoppers 12 shown below the arrow bite between the moving body 10 and the fixed body 11, respectively. Further, since the movable body 10 is prevented from moving in the direction perpendicular to the surface of the fixed body 11 by the guide projection 10a and the guide groove 11a, the movable body 10 stops when the floating stopper 12 bites.
[0024]
Since the floating stopper 12 bites instantaneously immediately after the protrusion 17 is retracted, the moving body 10 stops almost at the same time as the protrusion 17 is retracted even if the movement of the movable body is slightly faster. I do. Further, since the biting can be performed at an arbitrary position of the moving body 10, it can be stopped steplessly. Therefore, the stop position can be regulated accurately at any position.
[0025]
If the protrusion 17 of the moving means 16 is moved in the direction in which the moving means 16 protrudes, the floating stopper 12 is immediately pushed toward the base of the inclined surface 14, so that the biting state is released and the moving body 10 becomes movable. .
[0026]
FIGS. 4 and 5 are cross-sectional views showing another configuration example of the first embodiment. In this configuration example, the inclination direction of the slope in the first embodiment is reversed from FIGS. Thus, the moving body 10 is stopped.
[0027]
That is, the two inclined surfaces 14 and 14 are inclined so as to decrease as they approach each other, and the pair of floating stoppers 12 and 12 are pushed to the lowered portions by the elastic member 15 such as a spring. Further, from the through hole 19 formed between the inclined surfaces 14, 14, a protruding portion 17 whose tip is pointed by two inclined surfaces as shown in FIG. The moving body 10 can be moved by being pulled into the fixed member 11 as shown by an arrow.
[0028]
Then, when stopping, the protruding portion 17 is made to protrude from the fixing member 11 as shown in FIG. Then, the floating stoppers 12, 12 are moved in a direction away from each other against the urging force of the elastic member 15 by contact with the tip of the projection member 17, and are pushed up along the inclined surface 14, so that the moving body 10 The moving body 10 is stopped at the same time as this biting.
[0029]
Further, a configuration example as shown in FIGS. 6 and 7 may be used. In this configuration example, the movement of the moving body 10 is controlled by operating the moving means 16 from outside the two floating stoppers 12, 12.
[0030]
That is, in this case, through holes 19, 19 are provided outside the inclined surfaces 14, 14, respectively, and the rod portions 18, in which the projections 17, 17 corresponding to the through holes 19, 19 are arranged side by side, are fixed to the fixing member 11. To be reciprocally movable in the vertical direction.
[0031]
In this case, since the moving means 16 acts from outside the pair of floating stoppers 12, 12, the elastic member 15 may be provided between the two floating stoppers 12, 12. The number can be reduced.
[0032]
The other configuration examples are substantially the same except that the inclination direction of the inclined surface 14 is different and the form of the moving means 16 is different. Therefore, the same or corresponding parts are shown in FIGS. The same reference numerals are given to the members shown in FIG.
(Second embodiment)
FIG. 8 is a plan sectional view of a stopping mechanism according to a second embodiment of the present invention, and FIG. 9 is a sectional view taken along line AA of FIG.
[0033]
The stop mechanism according to the second embodiment is such that the moving body 10 in the first embodiment is a block member provided with a circumferential hole 11b for receiving the rotation shaft, and the fixed body 11 is also a rotation shaft. Then, except that the moving direction of the moving body 10 with respect to the fixed body 11 is a rotational movement, it is the same as that of the first embodiment, and the same or corresponding members as the stop mechanism of the first embodiment include: The same figure numbers as those in FIGS. 1 to 3 are shown.
[0034]
That is, in the stop mechanism of the second embodiment, the recess 13 in the stop mechanism of the first embodiment is an annular groove 13 formed on the inner surface of the circumferential hole 11b as shown in FIG. The surface corresponding to the inclined surface 14 on the bottom surface of the concave groove 13 in the stop mechanism of the first embodiment is a flat surface 14 that narrows the interval with respect to the outer periphery of the rotating shaft 10.
[0035]
The elastic member 15 such as a helix spring has one end locked by a pin 15 a provided in the annular groove 13, and the other end abutting on the floating stopper 12, thereby causing the pair of floating stoppers 12, 12 to have a flat surface. It is configured to urge in 14 directions.
[0036]
The floating stopper 12 is not only a steel ball but also a cylindrical steel rod having a length housed in the annular groove 13.
A through hole 19 is provided in the middle of the flat surface 14 in the radial direction, and the protrusion 17 is slidably fitted in the through hole 19 so as to be able to reciprocate. Although not shown, the rod 18 provided with the projection 17 is provided with a driving means for reciprocating the rod.
[0037]
As shown in FIG. 8, in a state where the protrusion 17 is protruded from the through hole 19, the floating stoppers 12, 12 are pushed by the protrusion 17 and located at the movable positions on both sides of the flat surface 14. The rotation shaft 10 rotates freely. When stopping, the protrusion 17 is drawn into the through hole 19 as shown in FIG.
[0038]
Then, the floating stoppers 12, 12 are pushed by the elastic members 15, 15 and move toward the center of the flat surface 14. As a result, the floating stoppers 12, 12 bite between the outer surface of the rotating shaft 10 and the bottom surface of the annular groove 13 of the fixed body 11. The rotation of the shaft 10 stops.
[0039]
FIGS. 11 and 12 are cross-sectional views showing another configuration example of the stop mechanism according to the second embodiment.
Also in this other configuration example, the moving body 10 is a rotating shaft 10, and the fixed body 11 is also a block member 11 provided with a circumferential hole 11 b for receiving the rotating shaft 10. Since the movement direction is the same as that of the first embodiment except that the movement direction is a rotational movement, the same or corresponding members as those of the stop mechanism of the first embodiment have the same reference numerals as those in FIGS. It is shown.
[0040]
In FIG. 11, the radial width of the annular groove 13 is smaller than the diameter of the floating stoppers 12, 12, and a smooth recess 14 is provided in the direction in which the radial width is increased. The recess 14 corresponds to the pair of inclined surfaces 14 in the stop mechanism according to the first embodiment.
[0041]
Then, a pair of floating stoppers 12, 12 are urged in a direction approaching each other toward the recess 14 by elastic members 15, 15 such as a helical spring having one end locked to a pin 15 a provided in the annular groove 13. ing.
[0042]
A projection 17 having an inclined surface and a pointed tip is slidably fitted in a through hole 19 formed in the center of the recess 14 so as to reciprocate. By projecting, the pair of floating stoppers 12, 12 are pushed by the protrusions 17 and positioned on both sides of the concave portion, and bite between the rotating shaft 10 and the bottom surface of the annular groove 13 by a narrow gap to stop rotation. .
[0043]
Conversely, when the protrusion 17 is pulled into the through hole 19, the pair of floating stoppers 12, 12 moves to the center of the recess 14, and is in a floating state to allow the rotation of the rotary shaft 10.
[0044]
13 and 14 are cross-sectional views of still another configuration example. In this other configuration example as well, the moving body 10 is provided with a rotating shaft, and the fixed body 11 is also provided with a circumferential hole 11b that receives the rotating shaft 10. It is the same as or equivalent to the stop mechanism of the first embodiment because it is the same as the first embodiment except that it is a block member and the moving direction of the moving body 10 with respect to the fixed body 11 is a rotational movement. The same members as those shown in FIGS. 1 to 3 are shown in FIG.
[0045]
Further, in this configuration example, the movement of the moving body 10 is controlled by operating the moving means 16 from outside the two floating stoppers 12, 12.
[0046]
That is, in the stop mechanism of this embodiment, the recess 13 in the stop mechanism of the first embodiment is an annular groove 13 formed on the inner surface of the circumferential hole 11b as shown in FIG. Although the surface corresponding to the inclined surface 14 of the bottom surface of the concave groove 13 in the stop mechanism of the embodiment is a flat surface 14 that narrows the interval with respect to the outer periphery of the rotating shaft 10, the shape is different. The substantive contents are the same.
[0047]
An elastic member 15 such as a helical spring is compression-inserted between the pair of floating stoppers 12, 12 so as to urge the flat surface 14 toward both ends. A through hole 19 is provided in the flat surface 14, and a rod portion 18, in which projections 17, 17 abutting from the outside of the two floating stoppers 12, are arranged side by side, reciprocate in the vertical direction with respect to the fixing member 11. Supported as possible.
[0048]
In this case, since the moving means 16 acts from outside the pair of floating stoppers 12, 12, the elastic member 15 may be provided between the two floating stoppers 12, 12. The number can be reduced.
[0049]
As shown in FIG. 13, in a state where the projection 17 is projected from the through hole 19, the floating stoppers 12, 12 are pushed by the inclined surfaces of the projections 17, 17 on both sides and pushed to the center of the flat surface 14. Then, the floating stoppers 12, 12 bite into the narrow gap, and the rotating shaft 10 stops. When rotating, the rod portion 18 is drawn into the through hole 19 as shown in FIG.
[0050]
Then, the floating stoppers 12, 12 are pushed by the elastic members 15, 15 and move in both directions of the flat surface 14. As a result, the floating stoppers 12, 12 are located between the outer surface of the rotating shaft 10 and the bottom surface of the annular groove 13 of the fixed body 11. Since 12, 12 is in the floating state, rotation is possible.
[0051]
As described above, the configuration examples shown in FIGS. 8 to 10 are the configuration examples shown in FIGS. 1 to 3, the configuration examples shown in FIGS. 11 and 12 are the configuration examples shown in FIGS. The configuration example shown in FIG. 14 is the same as the configuration example shown in FIGS. 6 and 7.
[0052]
(Third embodiment)
FIG. 15 shows an application example of the stop mechanism, and is a plan view of a circular table, and FIG. 16 is a sectional view taken along line BB of FIG.
[0053]
In the rotary table 20 according to the third embodiment, a shaft hole 22 is formed in a cubic block-shaped base table 21 which can be attached to a worktable of a measuring device or a machine tool (not shown). The rotating shaft 24 of the rotating disk 23 is inserted into the shaft hole 22 and is coaxially supported. An angle scale 23a is provided around the rotation plate 23 so that the rotation angle can be determined. Although the scale 23a is shown coarsely for the sake of simplicity of the drawing, it is actually finely scaled in units of 1 ° or 0.5 °.
[0054]
In FIG. 16, reference numerals 25 and 26 in the drawing both denote bearings for smooth rotation of the turntable 23.
Reference numeral 27 denotes a seal ring that seals a gap between the back surface of the rotary table 23 and the surface of the base table 21, and reference numeral 28 denotes an O-ring that seals a gap between the end of the rotary shaft 24 and the inner surface of the circumferential hole 22.
[0055]
As shown in FIG. 15, a concave portion 13 is provided on the inner surface of the shaft hole 22 of the base table 21 along the circumferential direction. Is provided with a flat bottom surface 14, hereinafter referred to as "flat bottom surface 14"), and roller-shaped floating stoppers 12, 12 are accommodated in the concave portion 13, and the respective floating stoppers 12, 12 are flattened by springs 15, 15. It is urged toward the bottom surface 14. The floating stopper 12 is not only a steel ball but also a cylindrical steel rod having a length housed in the recess 13.
[0056]
One end of each of the springs 15, 15 is locked by a pin 15a provided in the concave groove 13, and the other end of the spring 15, 15 is in contact with the floating stopper 12, and the two floating stoppers 12, 12 are pressed and biased in a direction approaching each other. Have been to be. Note that the flat bottom surface 14 described above only needs to substantially reduce the gap with the outer periphery of the rotating shaft 24, and may be an inclined surface (not shown) that positively approaches the outer circumferential direction of the rotating shaft 24. .
[0057]
A rod 18 for supporting the projection 17 of the moving means 16 is slidably accommodated between the two floating stoppers 12 in a support hole 30 provided orthogonal to the shaft hole 22.
[0058]
The diameter of the support hole 30 on the side of the shaft hole 22 is in contact with the outer periphery of the rod portion 18 without any gap, while the other side is an enlarged diameter portion 31, and the helix spring 32 Are coaxially fitted around the outer periphery of the rod portion 18 and are compressed between the flange portion 18a formed on the outer periphery of the rod portion 18 and are urged in a direction to retract from the shaft hole 22 side of the support hole 30.
[0059]
In the drawing, reference numeral 30b denotes a seal packing inserted in the enlarged diameter stepped portion 30a of the support hole 30, and seals the base ring 21 together with the seal ring 27 and the O-ring 28 so that liquid does not enter the base table 21.
[0060]
An operating shaft 33 is supported at the rear end of the rod portion 18 at right angles to the rod portion 18, and a rear end surface 18 b of the rod portion 18 is hung on a cam surface of a cam 34 provided coaxially with the operating shaft 33. The protrusion 17 is reciprocated in the recess 13 by the rotation of the cam 34 due to the pressing force of the elastic urging force 32.
[0061]
The distal end surface 35 of the operation shaft 33 protrudes from the surface of the base table 21, and is provided with a hexagonal hole 36 so that the operation shaft 33 can be rotated with a hexagonal wrench.
In the drawing, reference numeral 37 denotes a screw cap for closing an opening for incorporating the moving means 16 in the support hole 30 in a watertight manner.
[0062]
Next, the operation of the rotary table 20 will be described.
For example, when measuring the outer diameter contour of a certain product, the rotary table 20 is fixed on the measurement base, and then the target article is fixed on the turntable 23.
[0063]
Then, a measuring device, for example, a laser beam measuring device is arranged around the periphery, and the turntable 23 is rotated to measure various values of the peripheral contour.
At this time, when freely rotating the table, the operating shaft 33 is rotated by a hexagon wrench, the cam 34 is rotated, the projection 17 is protruded, and the floating stoppers 12, 12 are recessed at a wide interval as shown in FIG. Push into 13. Therefore, the rotating shaft 24 can freely rotate, and the rotation measures the contour around the article on the rotating plate 24.
[0064]
Next, when it is necessary to stop the target article, the operation shaft 33 is rotated by operating the hexagon wrench, the cam 34 is rotated, and the projection 17 is drawn into the shaft hole 22.
[0065]
Then, the floating stoppers 12, 12 are pushed by the springs 9, and bite between the bottom surface of the concave portion and the rotating shaft 24. At this time, no matter which direction the rotating shaft 24 rotates in the direction in which the interval becomes narrower, any one of the floating stoppers 12 bites into the narrowing gap, so that the rotating disk 23 rotates in any direction. As soon as the rotation stops.
[0066]
Then, since the biting is performed almost simultaneously with the immersion of the projection 17, the turntable 23 stops at the same time as the rotation of the operation shaft 33, and after the stop, the turntable 23 does not move in any direction unless the protrusion 17 is made to protrude. Does not rotate.
[0067]
Therefore, the switching operation between rotation and stop of the turntable 23 can be performed quickly and easily.
The stop mechanism used in the rotary table of the third embodiment is structurally the stop mechanism of the first embodiment shown in FIGS. 1 to 3 or the second embodiment shown in FIGS. However, as other stop mechanisms, the stop mechanism of the first embodiment shown in FIGS. 4 and 5 or the second embodiment shown in FIGS. The stop mechanism of the present embodiment, the stop mechanism of the first embodiment shown in FIGS. 6 and 7, or the stop mechanism of the second embodiment shown in FIGS. 13 and 14 may be used.
[0068]
Although the third embodiment shows a case in which this stop mechanism is applied to a rotary table, this stop mechanism is not limited to a rotary table, but can be applied to various types of mechanical devices. The present invention can be applied as a stop mechanism for a member that moves in a desired manner.
[0069]
【The invention's effect】
As described above, the stop mechanism of the present invention allows the floating stopper to bite between the movable body and the fixed body, so that the movable body can be quickly stopped, and the stop mechanism can be stopped in any direction. It is possible and has an effect that is versatile.
[0070]
In addition, since the structure is simple, there is an effect that it can be easily manufactured.
[Brief description of the drawings]
FIG. 1 is a sectional view of a stop mechanism according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is an operation explanatory sectional view of a stop mechanism according to the first embodiment of the present invention.
FIG. 4 is a sectional view of another configuration example of the stop mechanism according to the first embodiment of the present invention.
FIG. 5 is an operation explanatory sectional view of the stop mechanism shown in FIG. 4;
FIG. 6 is a sectional view of still another configuration example of the stop mechanism according to the first embodiment of the present invention.
FIG. 7 is an operation explanatory sectional view of the stop mechanism shown in FIG. 6;
FIG. 8 is a sectional view of a stop mechanism according to a second embodiment of the present invention.
FIG. 9 is a sectional view taken along line AA of FIG. 8;
FIG. 10 is a sectional view for explaining the operation of the stop mechanism shown in FIG. 8;
FIG. 11 is a sectional view of another configuration example of the stop mechanism according to the second embodiment of the present invention.
12 is an operation explanatory cross-sectional view of the stopping mechanism shown in FIG. 11;
FIG. 13 is a sectional view of still another configuration example of the stop mechanism according to the second embodiment of the present invention.
FIG. 14 is an operation explanatory sectional view of the stop mechanism shown in FIG. 13;
FIG. 15 is a plan view of a circular table according to a third embodiment of the present invention.
FIG. 16 is a side view of a rotary table according to the third embodiment of this invention.
FIG. 17 is a plan view of a conventional circular table.
[Explanation of symbols]
REFERENCE SIGNS LIST 10 moving body 11 fixed body 12 floating stopper 13 concave portion 14 inclined surface 15 elastic member 16 moving means 17 projecting portion 18 rod portion

Claims (3)

A fixed body, a moving body supported at a fixed parallel distance to the surface of the fixed body so as to be relatively movable, and provided on the surface of the fixed body, in opposite directions along a moving direction of the moving body. A pair of slanted surfaces, a pair of floating stoppers having a circular cross section arranged corresponding to the pair of slanted surfaces, a biasing means for biasing the pair of stoppers in opposite directions, Moving means for simultaneously moving the floating stopper in the opposite direction against the urging force of the urging means. The moving body in the stopping mechanism according to claim 1, wherein the moving body is a block member provided with a circumferential hole for receiving the rotating shaft, and a moving means for moving a floating stopper is supported by the block to rotate the moving body. A stopping mechanism, which is a rod that is reciprocally movable in a radial direction of the rotating shaft with respect to the shaft. A circular table comprising a base table capable of being attached to a measuring device, a machine tool, or the like, and a rotary plate rotatably supported on the base table, wherein a rotary shaft of the rotary plate, The radial width of the concave portion formed along the circumferential direction formed between the inner surface of the shaft hole of the table for receiving the shaft and the circumferential concave portion formed on the inner surface of the shaft hole side is changed so as to be inclined. A pair of inner surface deforming portions, the directions of change of which are opposite to each other, and a pair of inner surface deforming portions arranged and housed in the circumferential recess corresponding to the two pair of inner surface deforming portions. A pair of floating stoppers having a circular cross section, an elastic member for urging the floating stoppers in opposite directions, and a pressing rod for simultaneously moving the floating stoppers in a direction opposite to the urging direction of the elastic members. And a circular table with.

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