JPH0325735Y2 - - Google Patents

Description

[Detailed explanation of the idea] Field of use for work The present invention relates to a vibration cutting machine.

BACKGROUND ART Conventionally, a vibration cutting machine used for various cutting operations has a camshaft 2 rotatably supported within a main body 1, as shown in FIG. 2, for example.
A front shaft 6 is provided with a cam 3 at its front end, and is supported so as to be reciprocally movable in the axial direction by forming a longitudinal groove 5 that slidably engages with a pin 4 provided on the main body 1.
is placed in the main body 1, and a ball member 8 supported in a recess 7 at the rear end of the front shaft 6 is brought into contact with the cam 3, and rotation of the cam shaft 2 causes the front shaft 6 to move in the axial direction. While reciprocating, the base of a cutting blade 10 as shown in FIG. 3 is inserted and fixed into a chuck 9 provided at the front end of the front shaft 6 extending forward from the main body 1. The object to be cut is cut by reciprocating motion of the cutting blade 10 while pressing the tip of the cutting blade 10 against the object.

Problems to be Solved by the Invention In such conventional vibration cutting machines, the cutting blade 10 is tightened and fixed by the chuck 9, so the chuck tightening loosens during use, causing the cutting blade 10 to come off or become bent. There is a danger, and since the reciprocating movement of the front shaft 6 is guided by the engagement between the pin 4 of the main body 1 and the longitudinal groove 5 of the front shaft 6, it is difficult to avoid pressure when tightening the chuck 9 or from external pressure. This has the disadvantage that there is a risk that the engaging portion between the pin 4 and the groove 5 may be deformed, resulting in inoperability.

Therefore, the present invention eliminates the shortcomings of conventional vibration cutting machines, operates well over a long period of time without failure, is easy to handle and maintain, and is simple in structure and can be manufactured at low cost. The purpose is to provide cutting machines.

Means for Solving the Problems According to the invention, there is provided a cam supported in a body and rotatably driven; a cam supported in a longitudinal hole of the body and drivingly connected to the cam at its rear end; A vibration cutting machine has a front shaft that is reciprocated in the axial direction by the rotation of A locking member is formed on the outer surface of the main body to allow the front shaft to move back and forth in the front-rear direction and cannot be removed, and is screwed onto the blade rest of the front shaft. It is characterized by a structure in which the cutting blade is fixed by a screw.

Function: Therefore, the locking member of the front shaft engages with the blade receiver at the front end of the front shaft that extends forward from the main body, so in the unlikely event that this engaging portion is deformed, repairs can be made easily. This is easy to do, and the cutting blade is securely fixed by the screw screwed into the blade receiving portion of the front shaft, so that the locking member is not deformed when the blade is attached or removed.

Embodiments Next, the present invention will be described based on embodiments shown in the drawings.

FIG. 1 is a sectional view showing the main parts of the vibration cutting machine according to the present invention, in which a front shaft 22 is disposed in a longitudinal hole 21 formed in an elongated main body 20, and the front shaft 22 is supported by bearings 23 and 24 installed in the longitudinal hole 21 so as to be able to reciprocate back and forth in the axial direction with respect to the main body 20. The main body 20 has a large diameter hole 25 larger in diameter than the longitudinal hole 21 formed at the rear of the longitudinal hole 21, and the rear end 26 of the front shaft 22 extends from the bearing 23 of the longitudinal hole 21. It further extends rearward into the large diameter hole 25, and a steel ball member 27 is attached to the rear end portion 26 of the front shaft 22 extending into the large diameter hole 25.
A recess 28 is formed to receive the. The ball member 27 is the camshaft 2 in the conventional example shown in FIG.
engages with a cam 29 similar to the cam 3 provided in the
This cam 29 is rotationally driven as in the conventional example shown in FIG. 2, and this rotational force causes the ball member 27 and the front shaft 22 to reciprocate back and forth in the axial direction. The rear end 26 of the front shaft 22 is made to extend rearward through the large diameter hole 25 so that it cannot enter into the bearing 23 of the hole 21 of the main body 20 during this reciprocating movement, and the recess 28 is Even if it spreads, it does not interfere with the reciprocating movement of the front shaft 22.

The front shaft 22 has a front end 30 extending forward and outward from the front end 31 of the main body 20, and the front end 30 of the front shaft 22 has a front end 30 extending from the front edge 41 along the axis of the front shaft 22. The blade receiving portion 32 is formed by cutting and creating a long and narrow groove in the longitudinal direction. A plate-shaped locking member 33 is fixed to the front end 31 of the main body 20 by screws 34, for example, and is formed by bending an annular washer that fits into the front end 30 into an L shape. , the bent portion 35 of the locking member 33 is arranged so as to extend into the blade receiver 32 of the front end 30 of the front shaft 22 and extend inside the blade receiver 32 in the diametrical direction of the front end 30. The shaft 22 is guided so as to be able to reciprocate in the longitudinal direction relative to the locking member 33 and the main body 20, and to be immovable relative to them and immovable.

The cutting blade 36 is disposed with its rear end base engaged in the blade receiving part 32 of the front end 30 of the front shaft 22,
The rear end base of the cutting blade 36 is connected to the front end 30 of the front shaft 22 by screws 39 and 40 screwed into threaded holes 37 and 38 formed in the front end 30 of the front shaft 22 and spaced apart from each other in the longitudinal direction. It is firmly fixed. The cutting blade 36 projects forward from the front end edge 41 of the front shaft 22, and forms a cutting blade at the front projecting end.

Note that the blade receiving portion 32 is not limited to the slotted groove shown in the illustrated example, but may be a flat surface joined to one side of the cutting blade 36, or any other appropriate shape.

When cutting objects such as bamboo shoots, the operator must use the main body 2.
0 and press the forward protruding end of the cutting blade 36 against the object to be cut. At this time, the ball member 27 is reliably engaged with the rotating cam 29 and reciprocated in the front-back direction by the rotation of the cam surface 29, and at the same time, the front shaft 22 is guided by the locking member 33 and reciprocated in the front-rear direction. Then, the object to be cut can be cut by the cutting blade 36.

Effects of the invention With the structure of the invention explained above, the invention has the following effects:
Since the locking member is fixed to the outer surface of the main body, maintenance, inspection and repair of the machine can be performed extremely easily.
Furthermore, since the cutting blade is securely fixed by a screw screwed into the front end of the front shaft, unlike the chuck fixed in conventional vibration cutting machines, the cutting blade is less likely to loosen or fall off, and it is easy to remove the blade when attaching or removing it. This has the advantage that there is no need to worry about deforming the locking member.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of a vibration cutting machine showing an embodiment of the present invention, FIG. 2 is a sectional view of a conventional vibration cutting machine, and FIG. 3 is a sectional view of the vibration cutting machine shown in FIG. 2. FIG. 4 is a perspective view of a locking member. 20...Main body, 21...Longitudinal hole, 22...
Front shaft, 29...cam, 32...blade receiver, 33...
Locking member, 39, 40...screw, 36...cutting blade.

Claims (1)

[Scope of utility model registration request] A cam 2 supported within the main body 20 and rotationally driven.
9; a front shaft 22 supported in the longitudinal hole 21 of the body and drivingly connected to the cam at the rear end 26 to be reciprocated in the axial direction by rotation of the cam; A vibration cutting machine having a cutting blade 36 attached to the front end portion 30 of the extending front shaft to cut a workpiece, a blade receiving portion 32 being formed in the front end portion of the front shaft in the longitudinal direction; A locking member 33 that locks the front shaft so that it can reciprocate in the front-back direction and cannot be removed is fixed on the outer surface of the main body, and is attached to screws 39 and 40 that are screwed into the blade receiving portion of the front shaft. A vibration cutting machine characterized in that the cutting blade is fixed.