Chucks or sockets – Socket type – Resilient split socket
Reexamination Certificate
1999-10-07
2001-07-24
Bishop, Steven C. (Department: 3722)
Chucks or sockets
Socket type
Resilient split socket
C279S050000, C279S057000, C279S074000, C279S082000, C279S146000, C279S147000, C409S182000
Reexamination Certificate
active
06264208
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a chuck assembly for chucking a drill or the like.
FIG. 5
shows a conventional chuck assembly used for a router machining tool or the like. The chuck assembly is composed a spindle
22
provided with an opening portion
21
, chucks
24
provided in the opening portion
21
for defining an opening portion for clamping a tool
20
, and a sleeve
25
provided with a pressure member
28
for narrowing the opening portion
23
of the chucks
24
. In the conventional example shown in
FIG. 5
, when the sleeve
25
is screwed and moved toward the right of
FIG. 5
, the tool
20
is clamped and fixed by the pressure of the pressure member
28
.
By the way, in the clamping and fixing work of the tool
20
according to the conventional example shown in
FIG. 5
, for example, a wrench for holding the spindle
22
to be unrotatable and an operational jig for operatively rotating the sleeve
25
are prepared. The spindle
22
is prevented from rotating by being held with the wrench. The operational tool is retained at retainer recesses
26
of the sleeve
25
. The sleeve
25
is rotated relative to the spindle
22
. Accordingly, the worker has to hold the tool inserted into the opening portion
23
of the chucks
24
in addition to the wrench for preventing the rotation of the spindle
22
and the operational jig for rotating the sleeve
25
. Thus, the tool clamping and fixing work is very troublesome. Incidentally, reference numeral
27
in
FIG. 5
denotes a taper portion formed in an inner circumferential wall of the opening portion
21
of the spindle
22
.
Also, another conventional example of a chuck assembly has been proposed in which a suitable lock mechanism is provided, and the sleeve is rotated after the rotation of the spindle is prevented by the operation of the lock mechanism.
In this conventional example, in the clamping and fixing work of the tool, it is unnecessary to manually hold the spindle due to the existence of the lock mechanism. Accordingly, in comparison with the conventional example shown in
FIG. 5
, the workability becomes better. However, the lock mechanism becomes intricate so that the cost therefor is high.
SUMMARY OF THE INVENTION
In order to overcome the above-noted difficulties, an object of the present invention is to provide a chuck assembly which is superior in practical usability and workability in clamping and fixing a tool to a spindle without fail and with ease by lever-operation of a specialized operational jig.
According to a first aspect of the present invention, there is provided a chuck assembly system comprising a chuck assembly body for clamping a working tool and an operational tool for operating said chuck assembly body, characterized in that said chuck assembly body includes a tool clamping portion provided with an opening portion for clamping the tool and a sleeve portion for widening
arrowing the opening portion, a taper portion is provided on at least one of an inner circumferential wall of said sleeve portion and an outer circumferential wall of said tool clamping portion, said tool clamping portion and said sleeve portion are brought into contact with each other at the taper portion, a retainer portion for retaining the operational jig is provided on said sleeve portion, a support portion is provided in a predetermined position of said chuck assembly body for supporting the operational jig retained at the retainer portion, the operational jig slidingly moves said sleeve portion, said sleeve portion retained by the operational jig is slidingly moved relative to the tool clamping portion when the operational jig is lever-operated in a taper direction of the taper portion by using the support portion as a fulcrum, and the opening portion of the tool clamping portion is widened
arrowed by taper action of the taper portion by the sliding movement of the sleeve portion.
According to a second aspect of the invention, in the chuck assembly system according to the first aspect of the invention, the taper portions are provided on both of said tool clamping portion and said sleeve portion, the taper portion on the outer circumferential wall of said tool clamping portion is formed into a taper portion tapered toward a tip end and the taper portion of the inner circumferential wall of said sleeve portion is formed into a taper portion that engages with the taper portion of said tool clamping portion in a taper manner, said sleeve portion is slidable back and forth, said sleeve portion retained by the operational jig is slidingly moved back and forth relative to said tool clamping portion when the operational jig is lever-operated back and forth of said sleeve portion by using the support portion as the fulcrum, and the opening portion of said tool clamping portion is widened
arrowed by the taper action of the taper portions by the sliding movement of the sleeve portion.
In the chuck assembly according to an eleventh aspect of the invention in the seventh aspect of the invention, the projections of the operational jig are bent at the position in the vicinity of an extension line of the engagement edge.
In the chuck assembly system according to a fourth aspect of the invention in the second aspect of the invention, the operational jig is formed discretely from said chuck assembly body.
In the chuck assembly system according to a fifth aspect of the invention in the third aspect of the invention, a convex portion is formed at a tip end of the operational jig, a retainer portion of said sleeve portion is formed into a concave portion, and the convex portion of the operational jig and the retainer portion of said sleeve portion are engaged with each other in a convex/concave manner.
In the chuck assembly system according to a sixth aspect of the invention in the fourth aspect of the invention, a convex portion is formed at a tip end of the operational jig, a retainer portion of said sleeve portion is formed into a concave portion, and the convex portion of the operational jig and the retainer portion of said sleeve portion are engaged with each other in a convex/concave manner.
In the chuck assembly system according to a seventh aspect of the invention in the fifth aspect of the invention, the operational tool is formed integrally by a grip portion and a working portion, a pair of projections are formed in a widthwise direction of said working portion, the projections are provided with convex portion facing inwardly, and an engagement edge for engaging with the support portion is provided in the projections.
Also, in the chuck assembly system according to an eight aspect of the invention in the sixth aspect of the invention, the operational tool is formed integrally by a grip portion and a working portion, a pair of projections are formed in a widthwise direction of said working portion, the projections are provided with convex portion facing inwardly, and an engagement edge for engaging with the support portion is provided in the projections.
In the chuck assembly system according to a ninth aspect of the invention in the seventh aspect of the invention, a recess portion is provided on the side of said grip portion in the vicinity of the engagement edge.
In the chuck assembly system according to a tenth aspect of the invention in the eighth aspect of the invention, a recess portion is provided on the side of said grip portion in the vicinity of the engagement edge.
In the chuck assembly system according to an eleventh aspect of the invention in the seventh aspect of the invention, the projections of the operational jig are bent at the position in the vicinity of an extension line of the engagement edge.
In the chuck assembly system according to a twelfth aspect of the invention in the eighth aspect, the projections of the operational jig are bent at the position in the vicinity of an extension line of the engagement edge.
In the chuck assembly system according to a thirteenth aspect of the invention in the ninth aspect, the projections of the operational jig are bent at the position in
Ikehara Hisashi
Sakamaki Akira
Sakamaki Kazuo
Seki Tetuo
Bishop Steven C.
Sughrue Mion Zinn Macpeak & Seas, PLLC
Ukiwa Seiko Kabushiki Kaisha
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