JPS5841084Y2 - Eccentric mechanism of eccentric disc sander - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an eccentric mechanism for an eccentric disc sander.

Conventional eccentric disc sanders either have a rotating eccentric part exposed or are provided with a special protective cover that covers the rotating part.

The former is unfavorable from the standpoint of worker safety, and the latter is unfavorable from an economic standpoint.

Similarly, the counterweight, which is configured to balance the eccentrically mounted polishing shaft, is exposed, which is not desirable from a safety standpoint.

To explain with reference to FIG. 1, since the connector 7 is covered with the safety cover 6, the number of parts increases and the cost increases.

Since the counterweight 11 is exposed, there is a risk that fingers or the like may be caught during rotation.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, increase the safety of the eccentric part of an eccentric disc sander, and provide a simple and inexpensive eccentric mechanism.

The present invention covers the eccentric mounting portion by extending a wall from the lower end of the structure supporting the driven shaft to the entire periphery.

Further, regarding the counterweight part, a wall that rotates coaxially extends from the lower end of the eccentric part connecting part to the entire periphery, and the counterweight is housed inside this wall.

Referring to FIG. 2, power transmitted from the electric motor 1 is transmitted via the gear 2 to the spindle 3 of the vertical shaft.

Each shaft is rotatably fixed with a bearing 4.

A bearing 4 of the spindle 3 is supported on the main body by a packing gland 5.

The hole of the connector 7 is inserted into the tip of the spindle 3 and securely fixed with the fixing screw 8.

A bearing 4 into which a polishing shaft 9 is press-fitted is housed in the connector 7, and is rotatably fixed by a bearing presser plate 10 and a fixing screw 8.

The spindle 3 and the polishing shaft 9 are connected with an eccentric amount e, and the polishing disk 12 is screwed to the polishing shaft 9. This is an eccentric disk sander.

Since the connector 7 is a rotating body, the parts that are touched by hands should be covered.

A hanging wall 7A around the packing land is provided at the lower end of the packing land 5 to cover a part of the connector 7 to increase safety.

A storage chamber 7B formed by a peripheral wall 7A of the connector is provided from the lower end of the connector 7 on the outer periphery of the counterweight 11 so as not to touch the counterweight 11.

This is because even if the outer periphery of the wall 7A of the connector periphery were to be touched, safety would be increased because the connector would still be rotating concentrically.

Since these protection devices do not require the addition of new parts, they can be easily implemented.

FIG. 3 shows a cross section taken along line I-I in FIG. 2. The counterweight 11 is stacked on the bearing holding plate 10, and the bearing 4 is fixed with the fixing screw 8. The counterweight 11 is connected to the connector. It is housed inside the peripheral wall 7A and appears to rotate coaxially with the spindle 3.

As shown in FIG. 4, the connector peripheral wall 7 of the connector 1
A similar effect can be obtained by forming a counterbalance weight portion 13 of the connector in place of the counterbalance weight 11 in a part of A using a mold or the like.

According to the present invention, the mechanism of the eccentric part is made as simple as possible without adding new parts, and the counterweight part is covered with a peripheral wall coaxial with the rotating shaft, so it is inexpensive and highly safe. Eccentric disc sander can be provided.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal side view showing an embodiment of the eccentric mechanism of a conventional eccentric disc sander, FIG. 2 is a partial longitudinal side view of the eccentric mechanism according to an embodiment of the present invention, and FIG. Second
FIG. 4 is a sectional view taken along the line I--I showing the inner side of the peripheral wall of the connector shown in the figure, and FIG. 4 is a sectional view taken along the line II--I of FIG. 1...Electric motor, 2...Gear, 3...
...Spindle, 4...Bearing, 5...
・Packing land, 5A...Wall around packing land, 6...Safety cover 7...
Connector, 7A...Wall around connector, 7B...
...Storage chamber, 8...Fixing screw, 9...
... Polished shaft, 10 ... Bearing presser plate, 11 ...
... Counterweight, 12 ... Polishing machine, 13
・・・・・・Connector counterweight part, e・・・・・・
・Amount of eccentricity.

Claims (1)

[Scope of utility model registration request] In an eccentric disk sander in which a polishing shaft is rotatably and eccentrically arranged at the tip of a driven shaft, a hanging wall that covers an upper part of a connector to which the eccentric polishing shaft is attached is provided at a lower part of a packing land that pivotally supports the driven shaft. and a storage chamber formed at the lower end of the connector to securely house a counterweight that is formed concentrically with the driven shaft and prevents irregular rotation of the eccentric polishing shaft.