JPS6017292Y2 - Chuck for rotary race - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chuck for a rotary race for cutting, for example, a plywood board from raw wood.

Conventionally, in this type of rotary lace, the chuck was replaced depending on the type and grade of the log, but this replacement work had the disadvantage of requiring a great deal of labor and time.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to provide a rotary lace chuck that is compatible with logs and is easy to replace.

Next, an embodiment of the present invention will be explained according to the drawings. In the drawing, 1 is a bed, which is driven by left and right frames 2At 28Gm bars E=-TarM installed oppositely on the upper part of the bed. A rotating shaft 3a on the driving side and a rotating shaft 3 on the driven side
b is rotatably mounted on a concentric shaft, and both rotating shafts 3at
3b has a tapered shaft 4a.

At 4b, the chucks 5A and 5B of this example are keyed facing each other.

Since both chucks 5A and 5B have a symmetrical structure, the chuck 5A on the driving side is composed of a rear chuck body 6 and a front chuck body 7.

In this example, the chuck 5 is on the left side in the figure, that is, on the driving side.
The rear chuck body 6 of A is fitted onto the rotating shaft 3a, and the engagement surface of the base 8 of the rear chuck body 6 has a pair of engagement projections 9, 9 and a pair of engagement recesses 10, 10 are formed alternately at substantially four-division positions, and engagement recesses 11, 11 for being engaged are recessed in the upper part of the torque transmission surface of the fan-shaped double convex portions 9.9. There is.

On the engagement surface of the base 12 of the front chuck body 7 of the chuck 5A on the driving side, a pair of engagement convex portions 13.13 and a pair of engaged concave portions 14, 14 are provided at approximately quarter-divided positions. ,
Engagement protrusions 15, 15 are formed alternately and protrude from the upper portions of the torque receiving surfaces of both the fan-shaped protrusions.

Further, the convex portion 9 of the rear chuck body 6 is engaged in the concave portion 14 of the front chuck body 7, and the convex portions 13, 13 of the front chuck body 7 are engaged in the concave portions 10, 10 of the rear chuck body 6. At the same time, the engagement protrusion 15 of the front chuck body 7 is engaged with the engagement recess 11 of the rear chuck body 6, so that both 6 and 7 are configured to not be separated in the axial direction. There is.

In the figure, reference numeral 16 indicates a part of the hook protruding from the inner surface of the front chuck body 7, and the left and right hooks are 16° and 16, respectively, of the log W.
is on a reversible horizontal rack.

Next, the operation and effects of the embodiment having the above configuration will be explained.

First, when the log W is reversibly suspended between the left and right chucks 5A and 5B and the log W is rotated from the drive side, both chucks 5
In A and 5B, the rear chuck body 6 and the front chuck body 7 are connected so that torque can be transmitted, so that the cutting work of the raw wood W can be performed in general.

In addition, when the above-described cutting operation of the log W is completed, the front chuck body 7 can be pulled out in the axial direction by rotating the front chuck body 7 in the non-torque transmission direction.

In other words, since the present invention is mainly configured by dividing the chuck into a front part and a rear part, it is possible to not only easily replace the front chuck depending on the type of raw wood, but also to make it easy to replace the chuck. Work can be done safely.

Therefore, the present invention is an excellent invention as a chuck for a rotary race.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic side view mainly showing a rotary race chuck, FIG. 2 is a perspective view of the rear chuck body, and FIG. 3 is a cross-sectional view thereof. FIG. 4 is a perspective view of the front chuck body, and FIG. 5 is a cross-sectional view thereof. 3a, 3b... Rotating shaft, 5A, 5B...
...Chuck, 6...Rear chuck, 7...
...Front chuck, 9.13... Convex part, 10
, 14... recess, 11... engaging recess,
15...Engagement convex portion, W...Log wood.

Claims (1)

[Scope of utility model registration request] This is a chuck for a rotary race divided into parts for rotating logs, and a torque-transmitting member is provided on the engagement surface of the rear chuck body fitted on the rotating shaft and the front chuck body for chucking the logs. For this purpose, a convex portion and a concave portion are provided which are separably fitted into each other, and furthermore, a means for engaging the chuck bodies to prevent them from coming off in the axial direction is provided in the concave and convex portions. Chuck for rotary lace.