JP3169359B2 - Rotating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device for rotating a load pallet or the like at a fixed position.

[0002]

2. Description of the Related Art As shown in FIG. 5, the applicant has previously proposed a manual rotary device in which a plurality of bearings (73) are interposed between an under ring (7) and an upper ring (71).
As shown in FIG. 6, the bearing (73)
The shaft (72), which protrudes inward from the side wall of (7), is rotatably supported in a vertical plane and receives a thrust load. A ball (74) that can contact the side wall of the upper ring (71) at the tip of the shaft (72)
Are supported to prevent a large misalignment of the upper ring (71) with respect to the under ring (7).

[0003] At the lower part of the upper ring (71), a partially cut-off retaining ring (75) as shown in Fig. 7 is fitted over almost the entire circumference. ring
Upper ring against shaft (72) or ball (74) of (7)
(71) and the under ring (7) are prevented from being separated.

[0004]

The above-mentioned rotating device has a problem in that the upper ring (71) must be fitted over the ball (74) at the end of the shaft (72) on the under ring (7). A considerable clearance is generated between the under ring 7 and the side wall of the upper ring 71, and it is inevitable that the under ring 7 and the upper ring 71 are misaligned.
Therefore, it was impossible to rotate the upper ring (71) by power.

In order to mount the retaining ring (75), the retaining ring (75) must be fitted into the lower part of the side wall of the upper ring (71) while elastically deforming the retaining ring (75) from the inner hole (76) of the under ring (7). And the workability was extremely troublesome.

The under ring (7) and the upper ring (71)
The centers of the two rings are rotatably engaged with each other, or the peripheral walls of the under ring (7) and the upper ring (71) are rotatably tightly fitted via a row of balls to eliminate the misalignment of both rings. Is technically possible, but in the former case, there is a problem that the device becomes larger and heavier. In the latter case, there is a problem that high precision processing is required for the under ring (7) and the upper ring (71). The present invention is to clarify a power-driven rotating device that can solve the above problems.

[0007]

According to the present invention, there is provided a rotating apparatus comprising:
(1) A turntable (2) is mounted on the base (1) with the lower surface of the turntable freely rotatable, and can be swung on a base (1) in a plane parallel to the rotation plane of the turntable (2). A drive wheel (4) is provided on the support plate (3) provided so as to be rotatable in a plane parallel to the support plate, and a motor (41) provided on the support plate (3) is attached to the drive wheel (4). ) And is urged against the annular inner surface of the turntable (2) to support the fixed position on the base (1).
Two positioning rollers (5) and (5) and the drive wheel
(4) is in contact with the annular inner surface (26), and the contact point between the drive wheel (4) and the annular inner surface (26) and both rollers (5) (5)
The point of contact between the inner surface of the rotating base and the annular inner surface is located at the top of the virtual acute triangle T, and the positioning roller (5) contacts the inner edge of an inward flange (22) provided around the turntable (2). A flange (51) for preventing the inward flange (22) from lifting is protruded from 5), and the drive wheel (4) is located above the inward flange (22) of the turntable (2). .

[0008]

Specifically, the upper surface of the turntable (2) is a removable circular closing plate (24).

[0010]

The rotary table (2) is supported by a drive wheel (4) and two positioning rollers (5) and (5) located at three tops of a virtual acute triangle T, which are in contact with the inner surface of the rotary table (2). Therefore, the misalignment of the rotary table (2) with respect to the base table (1) can be reduced as much as possible.

[0011] Even if misalignment occurs during rotation of the turntable (2) due to poor machining accuracy of the turntable (2), the drive wheel (4) is not at a fixed position, but is pivotally supported. Board
(3) The drive wheel (4) is provided on the rotary table (2) and is only urged against the inner surface thereof. Since the motor (41) for rotating the drive wheel (4) is also provided on the support plate (3), a large load is applied to the motor (41) even if the rotary table (2) is misaligned. It does not hang, and the turntable (2) via the drive wheel (4)
Can be reliably driven to rotate.

A positioning roller (5) contacts an inner edge of an inward flange (22) provided around the turntable (2), and the roller (5) is a flange (51) for preventing the inward flange (22) from lifting. ), And if the drive wheel (4) is located above the inward flange (21) of the turntable (2), the turntable (2) will not be able to lift up and come off the base stand (1). Absent.

If the upper surface of the turntable (2) is formed by a removable circular closing plate (24), the drive wheel (4) and the positioning rollers (5) (5) ( 5) can be attached, and assembling workability is improved. In addition, closing plate (2
By mounting 4), the internal rotary drive system is hidden and the appearance is improved, and the rotary drive system can be protected.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of a rotary device with a blocking plate (24) removed, and FIG. 2 is a cross-sectional view of the rotating device with a blocking plate (24) attached. The rotating device includes an annular base table (1), a rotating table (2) rotatably supported on the base table (1), and a rotation drive system for the rotating table (2).

The turntable (2) has a vertically outward flange (11).
On the upper flange (12) of the main ring (10) having a U-shaped cross section protruding the (12), a mounting ring (13) having an L-shaped cross section is provided so that the vertical wall is located inside the horizontal wall. It is formed by welding or the like. In the embodiment, the stay (1) is placed on the diameter line of the main ring (10).
8) is being carried over.

Shafts (14) project outward from the vertical wall of the mounting ring (13) at equal intervals around the entire circumference, and bearings (15) are freely rotatable in a vertical plane on the shaft (14). Installed.

The turntable (2) has a vertically inwardly facing flange (21).
A cover ring (23) having an L-shaped cross section is provided on a flange (22) below a main ring (20) having a U-shaped cross section protruding the (22) so that a vertical wall is located outside a horizontal wall. It is formed by welding or the like so as to hide the bearing (15). The base table (1) and the rotary table (2) are formed by combining a channel material and an angle material which are bent in a ring shape and whose butted ends are welded.

The horizontal wall of the cover ring (23) of the turntable (2) is supported on the bearing (15). On the upper inward flange (21) of the main ring (20) of the turntable (2), a circular closing plate (24) is detachably fixed by screws, and a lower surface of the closing plate (24) is cross-shaped. The reinforcing rods (25) (25) are fixed in a shape.

The rotary drive system is formed by urging a drive wheel (4) connected to a motor (41) to the inner surface of the turntable (2). A mounting plate on one end of the stay (18) of the base stand (1)
(6) is fixed, and the support plate (3) is parallel to the rotation plane of the turntable (2) on the pivot (60) protruding from the mounting plate (6) in close proximity to the inner surface of the turntable (2). To be rotatably supported. The support plate (3)
Attach a motor (41) with a reducer (42) to the lower surface of the
The drive wheel (4) is fitted and fixed to the output shaft (43) passing through (3) from above. A friction ring 40 having a large friction coefficient and excellent wear resistance is mounted on the outer periphery of the drive wheel 4.

The support plate (3) is provided with a spring (6) in a direction in which the drive wheel (4) presses the inner surface of the main ring (20) of the turntable (2).
Powered by 5). The spring (65) is housed in the cylindrical portion (64) of a spring mounting member (62) formed by projecting a cylindrical portion (64) having a front opening at the tip of a shaft (63), and the shaft ( 63) is supported by a mounting piece (61) protruding from the mounting plate (6) so that the front and rear positions can be adjusted.

In the base stand (1), mounting stands (16) and (16) are protruded from the inner surface of the base stand (1) at two places on both sides of the stay (18), opposite to the mounting plate (6). The positioning rollers (5) and (5) are rotatably supported on the mounting table (16) in a plane parallel to the rotation plane of the rotary table (2). The support shaft (1
The positioning roller (5) is rotatably fitted to the shaft (17), and the mounting bolt (53) is screwed to the support shaft (17) via a washer (52) for preventing the roller from being removed. Are combined.

The peripheral surface of the positioning roller (5) hits the inner surface of the turntable (2), in this embodiment, the inner edge of the inward flange (22).
A flange (51) projecting from the upper end of the positioning roller (5) covers the flange (22) from above.

The point of contact between the two positioning rollers (5) and (5) and the respective rotary table (2) of the drive wheel (4) is located at the vertex of the virtual acute triangle T. The virtual acute triangle T of the embodiment is similar to an equilateral triangle, and the angle formed between the respective contact points around the rotation of the turntable (2) is 120 °.

However, the turntable (2) is composed of a drive wheel (4) and two positioning rollers (5), (5) located at three vertices of a virtual acute triangle approximate to an equilateral triangle.
(2) is supported against the inner surface, the angle between the contact points about the rotation center of the turntable (2) is equal,
The force f1 by which the drive wheel (4) presses the turntable (2) outward is evenly distributed to the respective positioning rollers (5) and (5).
That is, since the forces f2 and f3 for pressing the rotary table (2) outward generated by the positioning rollers (5) and (5) are equal to the pressing force f1 of the drive wheel (4), a spherical effect is generated. For this reason, it is possible to always stably rotate the turntable (2) irrespective of the poor roundness accuracy.

The drive wheel (4) of the turntable (2) and the rolling surfaces of the positioning rollers (5) and (5) have irregularities due to processing defects or the like, and the turntable (2) may be misaligned. Even though the drive wheel (4) is not in a fixed position, it is merely provided on a swingable support plate (3) and urged against the inner surface of the turntable (2). Wheel
(4) is not too hard. Since the motor (41) for rotating the drive wheel (4) is also provided on the support plate (3), a large load is applied to the motor (41) even if the rotary table (2) is misaligned. Drive wheel without hanging
The rotary table (2) can be reliably driven to rotate via (4).

The positioning roller (5) is in contact with the inner edge of an inward flange (22) provided around the turntable (2), and the roller (5) is a flange (51) for preventing the inward flange (22) from lifting. ), And the drive wheel (4) is located above the inward flange (21) of the turntable (2), so that the turntable (2) can be lifted off the base stand (1). Absent.

If the blocking plate (24) of the turntable (2) is removed, mounting of the positioning roller (5) by the bolt (53) and mounting of the drive wheel (4) can be easily performed, and the assembling workability is improved. .

The virtual triangle connecting the drive wheel (4) and the contact points of the two positioning rollers (5) and (5) with the rotary table (2) exceeds 90 ° in at least one of the three apex angles. If the triangle is an obtuse angle, the turntable (2) cannot be stably supported. However, if the acute triangle does not have an angle exceeding 90 °, the turntable (2) can be supported almost stably.

The rotating device of the present invention does not require alignment of the center of rotation of the base table (1) and the center of rotation of the rotating table (2). Therefore, as shown in FIG. It is possible to rotatably support an unstable article (9) having the projection (91). That is, the stay (18) of the base table (1) is omitted, the mounting plate (6) is protruded from the inner surface of the turntable (2), and the motor (41) as shown by a two-dot chain line in FIG. Is arranged so as to approach the turntable (2). The spring (65) for the support plate (3) is also a turntable (2).
As far as possible from the center of rotation. Also, turntable
A hole (24a) is opened in the center of the closing plate (24) of (2).

The leg (9) of the article (91) is inserted into the hole (24a) of the closing plate (24).
By fitting 1), the article 9 can be stably supported on the turntable 2. This is a technique that does not require alignment of the base table (1) and the rotary table (2) on the respective rotation centers.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a plan view of a rotating device with a blocking plate removed.

FIG. 2 is a sectional view of a rotating device.

FIG. 3 is an exploded perspective view of the rotating device.

FIG. 4 is a schematic view of a use state of another embodiment.

FIG. 5: Applicant has previously proposed a manual rotary device.

FIG. 6 is a sectional view of a main part of the above.

FIG. 7 is a perspective view of a retaining ring.

[Explanation of symbols]

 (1) Base (15) Bearing (2) Carousel (3) Support plate (4) Drive wheel (5) Positioning roller

Claims (2)

(57) [Claims] 1. A rotary table (2) is provided on a base table (1) with its outer peripheral lower surface rotatably supported and disposed on the base table (1), the rotary table being parallel to the rotation plane of the rotary table (2). A drive wheel (4) is provided on a support plate (3) provided to be swingable in a plane so as to be rotatable in a plane parallel to the support plate, and a motor (41) provided on the support plate (3). ) Is connected to the drive wheel (4) and is urged against the annular inner surface of the turntable (2) to urge the base wheel (1).
The two positioning rollers (5) and (5) supported in the upper fixed position and the drive wheel (4) are in contact with the annular inner surface (26), and the drive wheel (4) and the annular inner surface (26) are in contact with each other. The contact point and the contact point between the rollers (5) and (5) and the inner surface of the ring are located at the top of the virtual acute triangle T, and the positioning roller (5)
Is in contact with the inner edge of an inward flange (22) provided around the turntable (2), and the roller (5) is provided with a flange (51) for preventing the inward flange (22) from lifting up. Wheel (4)
Is a rotating device located above the inward flange (22) of the turntable (2). 2. The rotating device according to claim 1, wherein the upper surface of the turntable is a removable circular closing plate.