JPH0675846B2 - Canna - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a configuration of a planer for preventing a danger caused by a rotating drum.

[Prior Art] In the canna that exposes the cutting edge from the flat surface of the base, the cutting edge is always exposed, so the cutting edge is often inadvertently broken, or the rotating drum that rotates during cutting is used for other than the work piece. There was a problem of contacting and causing danger.

For this reason, an attempt has been made to provide a safety cover so as to cover the exposed portion of the rotary drum, which is effective in avoiding danger.

However, the conventional safety cover that covers the rotating drum is an arc-shaped safety cover that rotates around the rotation axis of the rotating drum, and when rotating the safety cover, it must be rotated coaxially with the rotating drum. Therefore, a complicated structure was unavoidable.

That is, when the conventional structure is shown in FIGS. 2 (a) and 2 (b), FIG. 2 (a) is a longitudinal cross-sectional view of an essential part of an example of a conventional safety cover for a planer.

The rotary drum 3 is configured to be exposed from between the front and rear bases 1 and 2, and a safety cover 4 is provided coaxially with the rotary drum 3 so as to cover the exposed portion.

In this case, the safety cover 4 is structurally reduced in size by being rotated coaxially with the rotary drum 3, so that the frame 5 protecting the rotary drum 3 is rotated to have the same shape as the safety cover 4. The surface 6 is formed and the safety cover 4 is slid.

With this structure, a simple structure can be obtained, and as a result, a small one whose outer shape does not change much from the case without a safety cover can be formed.

Further, as shown in FIG. 2 (b), it has been attempted to provide the safety cover 7 in the vicinity of the rotary cylinder 3, and similarly, the safety cover 7 can be provided without forming a large gap with respect to the rotary cylinder. It can be rotated.

[Problems to be Solved by the Invention] In the conventional structure shown in FIG.
Rotates along a large rotation surface 6 formed on the frame 5, which causes a large sliding friction.
In order to solve this problem, the safety cover 4 must be housed in a loose fit state to some extent.

However, if the safety cover 4 is housed inside the frame 5 in a loosely fitted state, there is a risk that cutting debris may clog the gap and stop operating.

Further, if the safety cover 4 is housed in the loosely fitted state, there is a risk that the rotary cylinder 3 and the safety cover 4 may come into contact with each other unless a sufficient space is provided in advance with the rotary cylinder 3.

Further, in the case of another conventional structure shown in FIG. 2 (b), since the bearing is formed coaxially with the rotary drum 3 to rotate the safety cover 7, it is strong and is in contact with the rotary drum 3. There is no fear of doing it.

However, forming the bearing coaxially with the rotary drum 3 makes it difficult to use the shaft of the rotary drum 3, resulting in structural complexity and difficulty in assembly and disassembly.

In addition, a safety cover 7 is provided inside the same frame 5 as the rotating body 3.
If it is provided, there is a risk that it may rotate together with the rotary drum 3 due to the influence of cutting debris, and there is a risk that the purpose may not be achieved.

If the safety cover 7 is provided on the outer side of the rotary drum 3 of the frame 5, there arises a problem that the axial dimension of the rotary drum 3 becomes large.

Further, in any case, since the safety cover is formed in an arc shape, there is a problem that the manufacturing is troublesome.

[Means for Solving the Problems] According to the present invention, a flat plate having a width of the rotary cylinder is housed inside the base on the rear side, and the plate is extended to the exposed portion of the rotary cylinder, that is, in action. The problem is solved by being configured to do.

[Operation] The plate stored inside the rear side base extends so as to cover the rotating drum by spring action, so it is possible to press the plate with the material to be cut and store it inside the base for cutting. Moreover, since the plate does not rotate when moving back and forth, but is formed flat and moves straight, a reliable operation can be expected.

Moreover, since it can be configured to advance and retreat in the cutting direction of the material to be cut, it does not require a large force to be stored in contact with the material to be cut, and an easy-to-use and easy-to-operate structure can be obtained.

[Embodiment] The present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view of a main part of a plane according to an embodiment of the present invention.

In FIG. 1, the canna has bases 8 and 9 provided at the front and rear, and a space formed between the front and rear bases 8 and 9.
A part of the rotating body 11 is exposed from 10.

A flat plate 12 extends from the inside of the rear base 9 so as to cover the rotary drum 11 exposed from the space 10.

Further, the plate 12 has a space formed inside the frame 13 that holds the bases 8 and 9, and allows the plate 12 formed flat to move back and forth.

Further, the plate 12 is provided with a spring 14, and is constantly urged so as to extend into the space 10 so as to cover the rotary cylinder 11.

Inside the frame 13, there is an electric motor 15 for rotating the rotary drum 11.
And a belt (not shown) is hung on the rotary cylinder 11.

A portion of the frame 13 accommodating the electric motor 15 is provided with a knob 16 capable of manually moving the plate 12, and the knob 16 is a plate made by a flexible member 17.
12 connected.

In such a configuration, the canna causes the rotary drum 11 to move to the electric motor 15
When the bases 8 and 9 are slid on the cut material such as wood, the plate 12 is pushed by the cut material and the spring 14 is rotated.
It will retreat to the inside of the frame 13.

Therefore, the rotary cylinder 11 is exposed to the space 10 formed between the front and rear bases 8 and 9 and the material to be cut can be cut.

Further, when the bases 8 and 9 are separated from the material to be cut after the cutting is completed, the plate 12 does not come into contact with the material to be cut, and thus the plate 12 extends from the inside of the frame 13 into the space 10 by the action of the spring 14. Thus, the rotating body 11 is covered.

Therefore, the plate 12 can protect the rotary drum 11 as a safety cover and can avoid the danger caused by the rotary drum 11.

Moreover, the plate 12 operates independently of the rotary cylinder 11, and since the plate 12 moves back and forth linearly, it moves back and forth into the frame 13 in a straight line, resulting in extremely smooth operation. You can do it.

For this reason, it is possible to expect a sufficient operation by simply touching the material to be cut, and it is not necessary to unnecessarily increase the force of the spring 14, and a planer that is easy to operate can be configured.

Further, since the plate 12 is connected to the knob 16 via the flexible member 17 by operating the knob 16,
It is possible to arbitrarily move the plate 12 back and forth, and it is possible to easily move the plate 12 back and forth other than contacting the material to be cut.

Such a knob 16 is convenient for confirming the operation of the plate 12, and since the operation of the plate 12 can be confirmed by the knob 16, it is necessary to confirm in advance that the plate 16 is lightly operated by the knob 16. For example, the planer 12 can be used in a state where the operation of the plate 12 is surely performed.

EFFECTS OF THE INVENTION According to the present invention, the plate smoothly advances and retracts into the space where the rotary drum is exposed from the base, and a planer that is easy and reliable to operate can be configured. Without affecting, you can not get the smooth operation that was a conventional problem,
Alternatively, various drawbacks such as an increase in the axial dimension of the rotary cylinder, a more complicated structure, and a troublesome manufacturing process of the arc-shaped safety cover can be eliminated, which is a large factor in manufacturing and use. It is possible to configure a planner that produces an effect.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of a planer according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are views showing a conventional planer, respectively. 8, 9 ... Base, 10 ... Space, 11 ... Rotating body, 12 ...
Plate, 13 ... Frame, 14 ... Spring, 15 ... Electric motor, 16 ... Knob.

Claims (1)

[Claims] 1. A planer having front and rear bases of a rotary cylinder having a cutting blade, and exposing the cutting blade from a plane portion between the front and rear bases, wherein a flat plate having a width of the rotary cylinder substantially inside the base on the rear side. A planer which is configured to accommodate a plate formed on the base plate and to extend the plate to an exposed portion of the rotary drum by a spring action.