JPH0318231Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the improvement of an interchangeable blade chuck for a wood carving machine for performing wood carving by hand by attaching various types of interchangeable blades to the tip.

[Conventional technology]

Conventionally, an electrically conductive wood carving machine as shown in FIG. 4 has been used. Its structure is such that a switch 1 provided at the end of the main body applies electric power supplied from a connector 2 to a motor 3, and a cam connected to the rotating shaft of the motor 3 and having a cam surface 4 at the end. By rotating the shaft 5, the replaceable blade support shaft 6 that comes into contact with the cam surface 4 reciprocates back and forth. Therefore, various types of replaceable blades A can be attached to the replaceable blade support shaft 6 to perform wood carving and the like.

Now, the chuck for the replaceable blade of such a wood carving machine has conventionally had a structure as shown in FIG.

A split groove 7 into which the replaceable blade is inserted is provided at the tip of the replaceable blade support shaft 6 described above. And a female thread 8 separated by a split groove 7 of the replaceable blade support shaft 6
is provided, and a male screw 9 is screwed into the female screw 8 to press it into a hole formed in the replaceable blade A inserted into the split groove 7.

[Problem that the invention attempts to solve]

To use the chuck of the replaceable blade A, it is necessary to hold the replaceable blade A in hand and insert it directly into the split groove 7, but to press and hold the replaceable blade A, insert a hex wrench and tighten the screw.

Therefore, the work involved the risk of cutting one's hand with the replaceable blade A, and was extremely inconvenient to handle.

[Means for solving problems]

The present invention was developed in view of the above-mentioned problem, and its means include a split groove provided at the end of the support shaft of the replaceable blade, and a split groove that penetrates from the outer surface of the support shaft to the split groove. A cylindrical holder having a through hole for housing a steel ball that presses a replacement blade inserted into the groove, a hole that covers the shaft end and allows the front chess steel ball to move, and a cylindrical holder that is wrapped around the holder. A wood carving machine comprising: a hole slightly smaller than the diameter of the steel ball; a hole considerably smaller than the diameter of the steel ball; and an elastic member that applies different spring forces to the steel ball inserted into the hole. This is achieved by a replaceable blade chuck.

〔Example〕

Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing the replaceable blade chuck of the wood carving machine of the present invention.

Reference numeral 13 is the main body of the wood carving machine. A split groove 7 is provided in the axial direction at the end of the support shaft 6 of the replaceable blade, and the replaceable blade 14 is inserted into the split groove 7.
A through hole 8 is perpendicularly formed in the outer surface of the end portion of the support shaft 6 toward the split groove 7 . Next, the cylindrical holder 11 is inserted into the support shaft 6 to prevent the replacement blade 14 from shifting in the direction in which the split groove 7 opens (horizontal direction). Furthermore, holder 1
A stepped portion 11a is provided around the support shaft 1, and a hole 11b that coincides with the through hole 8 of the support shaft 6 is bored. After inserting the holder 11 into the support shaft 6, the holes 8 and 11 of the support shaft 6 and the holder 11 are
Insert the steel ball 9 with b aligned. Next, an elastic member 15 having a substantially ring-shaped leaf spring is rotatably wound around the stepped portion 11a of the holder 11.
The elastic member 15 also includes a lever 16 and a hole 15a having a diameter considerably smaller than the diameter of the steel ball 9.
A large hole 15b having a diameter slightly smaller than that of the steel ball 9 is formed.

Next, the operation and effect of this embodiment will be explained based on FIGS. 2 and 3.

FIG. 2 shows a state in which the pressure of the steel ball 9 against the replaceable blade 14 is released in order to insert or remove the replaceable blade 14, FIG. 2a is a perspective view thereof, and FIG. 2b is an A-A thereof. FIG.

Elastic member 15 wrapped around holder 11
Holding the lever 16, rotate the elastic member 15 relative to the holder 11, and insert the large hole 15b into the holder 1.
The hole 11b of No. 1 is aligned with the hole 11b of No. 1. As a result, steel ball 9
Since it can protrude largely from this slightly large hole 15b, it can be moved upward in the figure, and the split groove 7
Pressure on the replacement blade 14 inserted inside is released,
The replaceable blade 14 can be inserted and removed freely.

However, the rather large hole 1 of the plate-shaped elastic member 15
5b is formed to be slightly smaller in diameter than the steel ball 9, so the steel ball 9 will not fall off.
Further, when the elastic member 15 climbs over the steel ball 9, this is done by the elastic force of the elastic member 15.

FIG. 3 shows a state in which the replaceable blade 144 is fixed by the steel ball 9 after inserting the replaceable blade 14, and FIG.
3 is a perspective view thereof, and FIG. 3b is a sectional view taken along line b-B.

After inserting the replacement blade 14 into the split groove 7, from the state shown in FIG.
6 in the direction of the arrow, the plate-shaped elastic member 1
5 slides around the groove 11a of the holder 11 and stops when the small hole 15a of the plate-shaped elastic member 15 is positioned above the steel ball 9. In this state, only a small portion of the steel ball 9 can enter the small hole 15a of the elastic member 15, so the steel ball 9 is pressed downward. Therefore, this steel ball 9 is inserted into the hole 14.
The replaceable blade 14 will not accidentally come out after being inserted into the inside.

[Effect of idea]

In the replaceable blade chuck for a wood carving machine according to the present invention, the plate-shaped elastic member can hold or release the pressure on the replaceable blade via the steel ball, so when attaching and detaching the replaceable blade, it is possible to It has the effect of preventing danger and enabling safe and simple work without requiring much force.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a replaceable blade chuck for a wood carving machine according to the present invention, Fig. 2a is a perspective view showing a state in which the pressure on the replaceable blade is released when attaching and detaching the replaceable blade, and Fig. 2b is A - A sectional view, Figure 3 a is a perspective view showing a state in which the pressure on the replacement blade is maintained, Figure 3
FIG. 4 is a sectional view showing the entire conventional wood carving machine, and FIG. 5 is a sectional view showing the replaceable blade chuck of the conventional wood carving machine. 6... Support shaft of replaceable blade, 7... Division groove, 8...
Through hole, 9... steel ball, 11... holder, 14...
Replaceable blade, 15...Plate-shaped elastic member, 15a...Small hole, 15b...Large hole, 16...Lever.

Claims (1)

[Scope of utility model registration request] A split groove provided at the shaft end of the support shaft of the replaceable blade, a through hole that penetrates from the outer surface of the support shaft to the split groove and accommodates a steel ball that presses the replaceable blade inserted into the split groove, and the shaft. a cylindrical holder that covers the end and has a hole through which the steel ball can move; a hole that is wrapped around the holder and is slightly smaller in diameter than the steel ball;
A replaceable blade chuck for a wood carving machine, comprising a hole considerably smaller than the diameter of a steel ball, and an elastic member that applies different spring forces to the steel ball inserted into the hole.