JPH0621640Y2 - Ultrasonic grinder stone chuck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a grindstone mounting structure for an ultrasonic grinder, that is, a grindstone chuck.

[Prior Art] As a grindstone chuck of this type, one having a configuration shown in FIGS. 4 to 5 is known as a typical one. In the chuck structure shown in FIG. 4, a tongue-shaped projection 2 is formed on a base 1, an arm 3 is provided so as to face the tongue-shaped projection, and the arm 3 is rotatably attached to the base via a fulcrum 4. The tip of the arm 3 is opened and closed with the tongue-shaped projection 2 by the screw 5. In addition, 6 is a grindstone clamped between the tongue-shaped projection and the arm.

The chuck structure shown in FIG. 5 has a protrusion 2'on the base 1
Is formed, a slit 7 having an appropriate width is provided near the middle of the protrusion, and a screw 5 for tightening is provided orthogonally to the slit. The slit 7 is slightly wider than the thickness of the grindstone 6. It is formed in the width.

[Problems to be Solved by the Invention] In the former chuck structure of the conventional example, the arm needs to have a large strength for tightening the grindstone, so that the mass of the arm must be increased and the weight is increased. However, since the arms are connected by the fulcrum, there is a problem that vibration loss occurs at the fulcrum, which causes heat generation.

The latter chuck structure in the conventional example is a configuration in which a grindstone is sandwiched between slits, and therefore the thickness of the grindstone must be matched to the width of the slit, and the grindstones having different thicknesses can be used in place of each other. It has a problem that it cannot be done. Also, when tightening with screws, the deflection of the protrusion is used, and the substantial sandwiching portion concentrates at the tip of the protrusion to form a linear sandwich, which not only does not transmit ultrasonic waves sufficiently, but also sandwiches it. There is also a problem that the pressure is concentrated on the linear sandwiching portion and the grindstone is easily damaged at that portion, and that metal fatigue, that is, a settling occurs on the protruding portion due to repeated bending.

[Means for Solving Problems] As a concrete means for solving the above problems, the present invention provides a base to which a grindstone is attached, a square tubular pressing metal fitting fitted to the base, and a screw on the pressing metal fitting. And a plate-shaped mounting portion integrally formed on the base, and an end portion of the grindstone is inserted between the mounting portion and the pressing metal fitting so that they are in surface contact with each other. To provide a grindstone chuck for an ultrasonic grinder characterized by being fixed by the screw, which is sandwiched in a surface contact state by the square tubular pressing metal fitting, so that ultrasonic waves are efficiently transmitted. Moreover, the thickness of the grindstone is not restricted.

[Embodiment] Next, the present invention will be described in more detail with reference to the illustrated embodiment. Reference numeral 11 is a base, and a plate-like mounting portion 12 is projected from the base to be integrally formed. A separate pressing metal fitting 13 to be fitted into the mounting portion 12 is formed in a rectangular tube shape, and a tightening screw 14 is screwed to one side surface (upper surface) of the pressing metal fitting. In this case, the tightening fitting 13 is formed to have a size that allows loose fitting with respect to the mounting portion 12, and the screw 14 is screwed in an angular direction orthogonal to the axial center of the rectangular tube. A boss portion 15 may be provided, for example, in order to stabilize the screwing.
Incidentally, 16 is a grindstone.

The grindstone chuck of the present invention configured as described above is
With 14 loosened, press fitting 13 into mounting part 12
Insert the end of the grindstone 16 between the lower surface of the mounting part 12 and the pressing metal fitting 13 and set it at the predetermined position, and then tighten the screw 14 so that the end of the screw hits the upper surface of the mounting part 12. If it is tightened further, the sandwiched state of the grindstone 16 will be pressed and the mounting will be stable (see FIG. 2). At the same time, the held grindstone 16 is pressed and held substantially evenly by the flat surface of the lower surface of the mounting portion 12 and the flat surface of the inner surface of the holding metal fitting 13, so that there is no loss in the transmission of ultrasonic waves and it is also held. Since there is no bending phenomenon in the state, there is no room for metal fatigue.

Further, even when the thickness of the grindstone 16 is different, as shown in FIG. 3, only the tightening stroke of the screw 14 is lengthened, and there is no change in other clamping states. Therefore, the grindstone to be attached is excellent in compatibility without any restrictions on its thickness or the like. In the above embodiment, the grindstone has been described, but in polishing using ultrasonic waves, for example, ceramics, wood, resin, metal or the like that transmits ultrasonic waves, the same structure can be used for mounting. Is possible.

[Effects of the Invention] As described above, the grindstone chuck for the ultrasonic polishing machine according to the present invention, the base to which the grindstone is attached, the square tubular pressing metal fitting to be fitted to the base, and the screwing to the pressing metal fitting. The base is integrally formed with a plate-shaped mounting portion, and an end portion of a grindstone is inserted between the mounting portion and the pressing metal fitting, and the surfaces are brought into contact with each other to be abutted to each other by the screw. Since it has a fixed structure, it has an excellent effect that ultrasonic waves are transmitted without loss and the sandwiching state is stable, even though the structure is simple.

Moreover, since the structure for clamping is not due to the twisting phenomenon, the clamping pressure does not concentrate linearly, there is no breakage of the grindstone and metal fatigue of the mounting part etc., and it is excellent for long-term use. Also effective.

Furthermore, since a square tubular member is used as the holding metal fitting, the whetstone to be mounted and other members to be mounted are
The thickness is not restricted and the compatibility is excellent.

[Brief description of drawings]

FIG. 1 is a perspective view showing a grindstone chuck for an ultrasonic polishing machine according to the present invention in a separated manner, FIG. 2 is a side view showing a grindstone attached to the chuck, and FIG. 3 is the chuck having different thicknesses. FIG. 4 is a side view showing a state in which a grindstone is attached, FIG. 4 is a side view showing an example of a conventional grindstone chuck, and FIG. 5 is a side view showing another example of the conventional grindstone chuck. 11 …… Base, 12 …… Plate-shaped mounting part 13 …… Pressing bracket, 14 …… Screw 15 …… Boss part, 16 …… Grinding stone

Claims (1)

[Scope of utility model registration request] 1. A base to which a grindstone is attached, a square tubular pressing metal fitting to be fitted to the base, and a screw screwed to the pressing metal, and a plate-shaped mounting portion is integrally formed on the base. A grindstone chuck for an ultrasonic polishing machine, characterized in that an end of a grindstone is inserted between the mounting portion and the pressing metal fitting, and the surfaces of the grindstone are brought into contact with each other and fixed by the screw.