JP2001129381A - Stirrer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide safety means. SOLUTION: A chuck on which a stirring bar is mounted in a freely attachable/detachable manner is fitted to a rotating shaft to be rotated by a motor provided on a stirrer body, and a chuck cover which covers the chuck in a freely openable/closable manner is pivotally supported on the stirring body so that the cover is rotatable. Further a switching means which controls the staring/stopping of the motor following the opening/closing operation of the chuck cover and a locking means which mechanically locks or unlocks the rotating shaft, are actuated. The chuck cover is mounted in a freely attachable/ detachable manner, on a connecting part. The switching means is constituted of a permanent magnet provided on the outer periphery of an annular hub and a magnetic sensor installed at the stirrer body. The described locking mechanism for the rotating shaft is constituted so that a locking pin implanted so as to be movable in a direction at right angles with the rotating shaft at a position where the chuck cover is opened, is fitted into a groove formed in the rotating shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a stirrer, and more particularly to a stirrer having a chuck cover.

[0002]

2. Description of the Related Art Conventionally, for example, registered utility model No. 30100
The stirrer shown in No. 21 includes a stirrer main body, a rotary shaft, a chuck connecting the rotary shaft and the stirrer, and a chuck cover, and the rotary shaft is driven by a motor provided in the stirrer main body. Rotate, a stirring rod connected by a chuck provided on the rotating shaft is configured to rotate,
The chuck cover covers the chuck from the outside, and can solve problems such as the operator's hair getting caught in the chuck during rotation.

[0003]

However, in the above-mentioned conventional stirrer, the problem that the operator's hair is caught during rotation can be solved by providing the chuck cover, but the chuck cover is completely removed. If not closed, a similar problem may occur, and no mechanism is provided to stop the motor when the chuck cover is not completely closed.

The present invention has solved such a problem.

[0005]

SUMMARY OF THE INVENTION A stirrer according to the present invention includes a rotating shaft rotated by a drive source, a main body rotatably supporting the rotating shaft, and a stirrer rod detachably mounted on the rotating shaft. A chuck, a chuck cover rotatably provided with respect to the main body, and a starter that is operated to start the drive source when the chuck cover is in a closed position covering the chuck portion; Locking means for the rotating shaft which is activated when the chuck cover is in an open position not covering the chuck portion.

In the agitator according to the present invention, the chuck cover is detachable from the main body when an external force of a predetermined value or more acts on the chuck cover.

The agitator of the present invention is characterized in that it has an annular hub pivotally supported by the main body, and the chuck cover is detachably provided on the hub.

The starting means comprises a permanent magnet provided on the outer periphery of the annular hub and a magnetic sensor provided on the main body. When the chuck cover is moved to a position covering the chuck, the magnetic sensor is activated. , An activation signal of the driving source is output from the output of the driving source.

The locking means for the rotating shaft is provided with a groove formed in the rotating shaft, an eccentric cam rotated by the chuck cover, and a eccentric cam inserted into and removed from the groove by the eccentric cam. A movable lock pin, wherein the lock pin fits into a groove provided on the rotating shaft at a position where the chuck cover is opened.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show the structure of a stirrer embodying the present invention, wherein 1 is a stirrer main body, 2 is rotatably supported by a main body 1, and is driven by a driving source such as a motor via a speed reduction mechanism. Shaft, 3 stir bar, 4 stir bar 3
A conventional known chuck 5 for detachably connecting the rotary shaft 2 to the rotary shaft 2 is provided with two annular hubs rotatably supported on the agitator main body 1 via a support pin 6. 2
An arcuate connecting bar 8 connecting the outer peripheral portions of the annular hubs 5 is an arcuate chuck cover 8 which is connected to the connecting bar 7 and is rotatable between a closed position covering the chuck 4 and an open position not covering the chuck 4. It is.

In the present invention, projections or holes 9 are provided on both end surfaces of the connection bar 7 and holes or projections 10 engaging with the projections or holes 9 are formed on the inner surface of the upper part of the chuck cover 8 at corresponding positions. Forming the protrusions or holes 9
The chuck cover 8 can be connected to the annular hub 5 through the connecting bar 7 by engaging the holes or protrusions 10 with each other, but excessive or excessive force is applied to the chuck cover 8. In this case, this easily detaches from the connecting bar 7 so that the chuck cover 8 and the annular hub 5 can be prevented from being damaged.

In the present invention, as shown in FIGS. 4 and 6, a permanent magnet 11
And a magnetic sensor 16 operated by the permanent magnet 11 is provided on a control circuit board 17 fixed to the main body 1 close to the annular hub 5 provided with the permanent magnet 11, and the chuck cover 8 is attached to the chuck 4. Only when the magnetic sensor is rotated to a position where the motor 18 is covered, an output is generated at the magnetic sensor, and the motor 18 is started via a control circuit.

Further, in the present invention, as shown in FIG. 7, a long slot 12 extending in the axial direction is formed in the rotary shaft 2.
The lock pin 13 inserted into the slot 12 is
To be movable in the direction perpendicular to the rotation axis 2 against
When the chuck cover 8 is in the open position, the eccentric cam 1 with the lock pin 13 fixed to the pivot pin 6
5 presses in the direction of the rotating shaft 2.

Since the present invention is configured as described above, the motor can rotate when the chuck cover 8 is closed, but when the chuck cover 8 is slightly opened, a magnetic sensor is provided on the chuck cover 8. Since the motor becomes insensitive to the magnetism of the permanent magnet 11, the motor cannot rotate, and
When the chuck cover 8 is further fully opened, the eccentric cam 15 provided on the pivot pin 6 rotates to push the lock pin 13 in the direction of the rotary shaft 2 so that the long slot 12 of the rotary shaft 2 faces the lock pin 13. Then, the lock pin 13 is fitted into the long slot 12 of the rotary shaft, and the rotary shaft 2 is stopped and locked.

[0016]

As described above, according to the stirrer of the present invention, a safety device is provided so that the motor does not start unless the chuck cover is completely closed. When the chuck cover is completely opened, the rotating shaft lock mechanism works to lock the rotating shaft, so it is necessary to hold down the rotating shaft when replacing the stirring rod. And has the great advantage that the chuck can be tightened with one hand.

[Brief description of the drawings]

FIG. 1 is a front view showing a state where a chuck cover of a stirrer of the present invention is closed.

FIG. 2 is a side view of the stirrer of the present invention in a state where a chuck cover is closed.

FIG. 3 is a side view similar to FIG. 2 with the chuck cover removed.

FIG. 4 is a front view of the stirrer of the present invention in a state where a chuck cover is opened.

FIG. 5 is a side view of the state of FIG. 4 with the chuck cover removed.

FIG. 6 is an explanatory view of a starting means of the stirrer of the present invention.

FIG. 7 is a plan view showing locking means of the stirrer of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stirrer main body 2 Rotating shaft 3 Stirrer bar 4 Chuck 5 Annular hub 6 Pivot pin 7 Connecting bar 8 Chuck cover 9 Projection or hole 10 Projection 11 Permanent magnet 12 Long slot 13 Lock pin 14 Spring 15 Eccentric cam 16 Magnetic sensor 17 Circuit Substrate 18 Motor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Kojima 3-93 Aioimachi, Kiryu-shi, Gunma Japan Kiryu Plant (72) Inventor Kiyoshi Hasegawa 4-15 Tenma, Kita-ku, Osaka-shi, Osaka 5 F-term (reference) 4G037 DA23 EA10

Claims (5)

[Claims] A rotating shaft rotated by a driving source, a main body rotatably supporting the rotating shaft, a chuck for detachably mounting a stirring rod on the rotating shaft, and a rotation with respect to the main body. A chuck cover that is freely provided; an activation unit that is activated to activate the drive source when the chuck cover is in a closed position so as to cover the chuck portion; and an opening in which the chuck cover does not cover the chuck portion. And a lock means for the rotary shaft that is activated when the stirrer is in the closed position. 2. The stirrer according to claim 1, wherein the chuck cover is detachable from the main body when an external force of a predetermined value or more acts on the chuck cover. 3. An annular hub rotatably supported by said main body, said chuck cover being detachably provided on said hub.
The stirrer as described. 4. The activating means comprises a permanent magnet provided on the outer periphery of the annular hub and a magnetic sensor provided on the main body, and when the chuck cover is moved to a position covering the chuck, the magnetic force is generated. The stirrer according to claim 3, wherein a start signal of the drive source is output from an output of a sensor. 5. A locking means for said rotating shaft, a groove formed in said rotating shaft, an eccentric cam rotated by said chuck cover, and said eccentric cam being inserted into and removed from said groove. 5. The lock pin according to claim 1, wherein the lock pin is fitted in a groove provided on the rotary shaft at a position where the chuck cover is opened. Stirrer.