JPH064158Y2 - Omni-directional stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a three-joint type omnidirectional system in which two arms each having a ball joint at one end are pivotally attached at the other ends to each other. The present invention relates to a universal stand, and is used, for example, as a stand for fixing a measuring instrument for measuring the size of a tool or a work in a machine tool at a desired position, or as a so-called tripod of a camera.

(Prior art and its problems) In the conventional three-joint type omnidirectional universal stand of this kind, each joint is made of a kind of collet chuck, so that the structure is complicated and the number of parts is large, and at the time of fixing. Since the parts have sliding friction with each other, the parts are severely worn and the durability is poor.

The present invention solves such a problem.

(Means for Solving the Problems) In the omnidirectional stand of the present invention, the other ends of two arms each having a ball joint at each one end are pivotally attached to each other by pivot bolts, A first support is fixedly mounted on the base end of the pivot bolt, and a second support is axially slidably inserted and supported on the tip end side, and the first and second supports are recessed in each arm. The support fitting holes are slidably fitted in the support fitting holes, and spring members are interposed between the bottoms of the support fitting holes and the supports. 2 A tightening nut that comes into contact with the support is screwed, and a slide shaft is slidably supported in each of the two arms so as to be slidable in the longitudinal direction of the arm. One end of each slide shaft is fitted with each support. It was serially installed in the dowel The upper part projects into the expansion hole of the entire surface opening, and between the projecting end of the slide shaft and each support, each slide shaft is rocked as the supports move toward each other. An oscillating connecting piece that pushes in a bulge shape is interposed, and the entire surface opening of each expansion hole is closed by a blind lid formed separately from each support.

Further, the entire opening of each expansion hole may be closed by a blind lid integrally formed with each support.

(Effect of the Invention) In the omnidirectional stand of the present invention, when the tightening nut is loose, both arms are rotatable relative to each other about the pivot bolt forming the first joint, and each slide is slidable. Since the shaft is not stretched by the swing connecting piece, the ball joints, which are the second and third joints, are also rotatable substantially in all directions with respect to the arm.

Then, when the tightening nut is rotationally operated in the tightening direction, the pivot bolt is pulled toward the nut as the nut rotates, whereby the first and second supports resist the biasing force of the spring member. The slide bolts move toward each other along the axial direction of the pivot bolt, and the swinging motion of each swing coupling piece accompanying the opposite movement of both supports causes a pulling action on each slide shaft. The ball pressing member is pressed against the balls of each ball joint by the action. At the same time, both arms are pressed against each other at their pivotal ends so that the ends of the arms overlap each other. Then, by sufficiently tightening the tightening nut, both arms are locked so as not to be rotatable relative to each other, and at the same time, each ball joint is also locked so as not to be rotatable relative to each arm.

Therefore, if one ball joint is connected to a fixed position and the held body is attached to the other ball joint side, the holding position of the held body can be adjusted arbitrarily with the tightening nut loosened. Therefore, it is possible to fix the held body at any desired position by simply tightening the nut.

(Embodiment) An embodiment will be described with reference to the drawings. FIG. 1 is a vertical sectional view showing an entire omnidirectional stand, and this stand includes a first arm 1 and a second arm 2. It consists of two arms.

Ball joints 3 and 3'are provided at one end portions of the first arm 1 and the second arm 2, respectively, and the other end portions of these arms 1 and 2 are overlapped with each other via a washer 4 and a pivot shaft passing therethrough. It is pivotally attached by bolts 5. A short cylindrical first support 6 is concentrically fixed to the base end of the pivot bolt 5, and a similar short cylindrical second support is provided on the tip end side, that is, on the end side where the screw 5a is cut. 7 is axially slidably inserted and supported, and these first and second supports 6, 7 are provided.
Are support fitting holes 8 and 9 formed in the arms 1 and 2
And are fitted so as to be slidable in the axial direction and non-rotatable, respectively, and between the bottom portions of the support fitting holes 8 and 9 and the inner end faces of the supports 6 and 7, respectively, for example, by disc springs. The spring member 10 is interposed, and the tightening nut 13 is screwed to the threaded portion 5a at the tip of the pivot bolt 5 so as to always contact the outer end surface of the second support 7. As shown schematically in FIG. 1, a thrust bearing 14 is attached to the outer end surface of the second support 7, and the tip end surface of the tightening nut 13 is substantially aligned with this thrust bearing 14. Abutted. Further, a guide protrusion for rotation restriction (only the guide protrusion of the support 6 is shown by 6a) is provided on the outer surface of each of the supports 6 and 7, and the guide protrusion is an inner surface of the support fitting holes 8 and 9. Is engaged with a groove (not shown) extending in the axial direction.

Further, as is apparent from FIG. 3, each arm 1, 2 has an expansion hole portion 15 whose upper surface is entirely opened so as to extend from each support fitting hole 8, 9 inward of the arm 1, 2. It is formed so as to communicate with the support fitting holes 8 and 9, and the entire surface opening 15a of the expansion hole 15 can be removed by a blind lid 16 made of synthetic resin formed in a shape that can be fitted into this. It is supposed to be blocked.

As is apparent from FIGS. 1 and 3, the blind lid 16 has an engaging projection 17 on its peripheral side surface except for a portion 16a which abuts the outer peripheral surface of the first support 6 or the second support 7. By being engaged with the engaging groove 17 formed in the inner peripheral wall surface of the expansion hole 15,
It is designed to be mounted and fixed in place. When mounting the blind lid 16, as shown in FIG. 3, it is inserted into the support fitting hole 8 or 9 and then the engaging projection 17
May be fitted into the engagement groove 18 of the expansion hole 15.

On the other hand, a through hole O extending in the longitudinal direction is provided in each of the first arm 1 and the second arm 2, and each first through hole O has a first hole.
The slide shaft 11 and the second slide shaft 12 are pierced and supported so as to be slidable in the arm longitudinal direction, and one end of each slide shaft 11 and 12 protrudes into the expansion hole 15 to connect the swing connecting pieces 19 and 20. The supports 6 and 7 are interlocked with each other, and the other end can be operatively connected to the ball pressing member 3c of each ball joint 3, 3 '.

As shown in FIGS. 1 and 2, each swing connecting piece 19 and 20 is formed in a wedge shape, and the pointed end is rounded and chamfered. The rounded pointed end is a side surface of each support 6 and 7. Engages with the curved concave portions 21 and 22 formed in
The wide end face opposite to the sharp end is formed in a curved surface shape, and the hemispherical end of each slide shaft 11, 12 is engaged with this. Each of the ball joints 3 and 3'is fitted in the casing 3b with a cylindrical casing 3b having a narrowed tip portion, a ball 3a rotatably held by the cylindrical casing 3b and having a screw shaft 3d for mounting. It consists of a ball pressing member 3c,
The casing 3b is screwed to a screw sleeve 23 attached to the ends of the arms 1 and 2. Further, the lengths of the slide shafts 11 and 12 are such that there is a slight gap S between the outer end of the slide shaft and the ball pressing member 3c when the tightening nut 13 is loosened, as shown in FIG. Set to various dimensions.

The tightening nut nut 13 is a metallic cylindrical nut body 13 that is screwed into the tip screw portion 5 a of the pivot bolt 5.
a and an outer casing 13b made of synthetic resin integrally formed with the nut body 13a embedded therein, and the outer casing 13b includes a grip portion for rotational operation.

The omnidirectional stand having the above-described structure is the first
In the state shown in the figure, since the tightening nut 13 is loose, both arms 1 and 2 are relatively rotatable around the pivot bolt 5, and the ball joints 3 of the balls 3a rotate within the casing 3b. Since it is motion-free, it is rotatable in almost all directions with respect to the arms 1 and 2.

Then, when the tightening nut 13 is rotated in the tightening direction from such a state, the pivot bolt 5 is pulled toward the nut 13 side with the rotation of the nut 13, whereby both the first and second supports 6, 6. The members 7 move in the support fitting holes 8 and 9 in the directions toward each other against the biasing force of the spring members 10 and 10. By the movement of both the supports 6 and 7 in the opposite direction, both the swing connection pieces 19 and 20 are moved to the slide shaft 1.
A slight swinging and swiveling motion with respect to the engaging portion with the 1st and 12th end portions as a base point is performed, thereby pushing both slide shafts 11 and 12 in a bulging manner toward the ball joints 3 and 3 ′ side. Each ball pressing member 3c is pressed against the ball 3a by the outer ends of the balls 11 and 12.

Therefore, by fully tightening the tightening nut 13, both arms 2 and 2 are pressed against the washer 4 on the pivot bolt 5 side and locked in an immovable state, and at the same time, the balls 3a of the ball joints 3 and 3'are locked. The ball pressing member 3c presses and fixes it in the casing 3b and locks it so that it cannot rotate. Therefore, both arms 1 and 2 can be locked at an arbitrary angle by simply tightening the tightening nut 13, and at the same time, the ball joints 3 and 3'can also be locked to the arms 1 and 3.
It can be locked at an arbitrary angular position with respect to 2.

Further, in order to release such a lock, by loosening the tightening nut 13, the above-mentioned locked state is released all at once. That is, in this case, the nut 1
When 3 is loosened, both supports 6 and 7 return to their original positions due to the restoring force of the spring member 10. Then, the oscillating connecting pieces 19 and 20 lose the thrusting action of the slide shafts 11 and 12, which causes The ball joints 3 and 3'can be bent with respect to the arms 1 and 2, and at the same time, the arms 1 and 2 can also be rotated with respect to each other.

FIG. 4 shows a blind plate 24 for closing the upper entire surface opening 15a of the expansion hole 15 which is continuously provided in the support fitting holes 8 and 9 of the arms 1 and 2, respectively. This is an example of a case where the blind plate 24 is formed, and the blind plate 24 is fitted into the expansion hole portion 15 at the same time when the supports 6 and 7 are fitted into the support fitting holes 8 and 9, respectively. 15a is closed, and therefore, at the same time as the removal of the supports 6 and 7 from the support fitting holes 8 and 9, the removal is performed from the expansion hole portion 15.

FIG. 5 shows an example of use of the above-described omnidirectional universal stand. One of the two ball joints 3 and 3'is connected to the magnet pedestal 25, and the other ball joint 3'is provided with an adapter 26. A measuring device 27 such as a dial gauge is fixed to this adapter 26, and the magnet pedestal 25 is placed on an appropriate measuring table made of a magnetic material, and the lever 25a is turned on and off to place it on the table. It can be fixed or open. Then, with the tightening nut 13 loosened, the measuring device 27 may be adjusted to the desired height and overhang position, and then the nut 13 may be tightened.

(Effects of the Invention) According to the omnidirectional stand of the present invention, when the three joints are fixed by the tightening operation of the tightening nut, the ends of both arms are pivoted on the pivot bolt side of the first joint. They are only pressed against each other in the axial direction of the bolt,
In addition, in both ball joints, which are the second and third joints, the ball pressing portion is merely pressed against the balls of each ball joint by the tensioning action acting on the slide shaft, and so-called sliding friction is generated in any joint. Since it does not occur, there is little wear of parts and it can withstand long-term use.

Further, in the present invention, since the upper portion of the expansion hole portion that is continuously provided in the support fitting hole of each arm is formed in the shape of an opening, the expansion hole portion can be easily drilled in the arm by machining. be able to. By the way, if the upper portion of the expansion hole is closed by a wall portion (corresponding to a blind lid) integrally extending from the arm, the expansion hole can be formed only by casting, but the present invention As described above, since the upper part is the expanded hole having the entire surface opening, a forged product can be used as the arm, and the arm can be easily manufactured by machining. Since the forged product can be used as described above, the mechanical strength can be improved by 2 to 3 times as compared with the cast product.

Further, since the upper opening of the expansion hole is closed by the blind lid, it is possible to prevent dust and the like from entering the expansion hole.

In this case, the blind lid may be formed separately from each support, or may be formed integrally with it, but in the case of a separate formation, it can be formed of synthetic resin or the like, which is easy to manufacture, Further, in the case of integral formation, it can be attached and detached together with the support, so that assembly and disassembly are easy.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an omnidirectional free stand, FIG. 2 is a perspective view of an operating mechanism portion of the same stand, and FIG. 3 is a perspective explanatory view showing an arm and a blind lid attached to an expansion hole portion thereof. FIG. 4 is a perspective explanatory view similar to FIG. 3 showing a modification of the blind lid, and FIG. 5 is a perspective view showing an example of using the omnidirectional stand. 1, 2 ... Arm, 3, 3 '... Ball joint, 5 ... Axis bolt,
6 ... 1st support, 7 ... 2nd support, 8, 9 ... Support fitting hole, 10 ... Spring member, 11, 12 ... Slide shaft, 13 ... Tightening nut, 15 ... Expansion hole part, 15a
... Opening area, 16, 24 ... Blind lid.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hans Meier Switzerland 8953 Dieticon Rheersentstrasse 12 (72) Inventor Daniel Maier Switzerland 8953 Dieticon Rärzentstrasse 12

Claims (1)

[Scope of utility model registration request] 1. The two other ends of two arms each having a ball joint at one end are pivotally attached to each other by a pivot bolt, and a first support is fixed to the base end of the pivot bolt. The second support is axially slidably inserted and supported on the tip end side, and the first and second supports are axially slidably fitted into the support fitting holes formed in the respective arms. In addition, a spring member is interposed between the bottom of each support fitting hole and each support, and a tightening nut that abuts the second support is screwed to the tip of the pivot bolt. A slide shaft is penetratingly supported in each of the two arms so as to be slidable in the longitudinal direction of the arm, and one end of each slide shaft is an expansion hole portion which is continuously connected to each support fitting hole and whose upper portion is a full surface opening. Plunge into the slide shuff Between the rush end of each of the supports and each support, a swing connection piece that pushes each slide shaft to the ball joint side by a swing due to the movement of each support toward each other is interposed, An omnidirectional stand in which the entire opening of each expansion hole is closed by a blind lid formed integrally with or separately from each support.