JPS584641Y2 - Side cutter for woodworking - Google Patents

Description

[Detailed description of the invention] This invention relates to a cutting tool for woodworking that can dig a groove of a certain depth along the side of a piece of wood.

To cut a groove of a certain depth on the side of a piece of wood, all you need to do is hold a power tool equipped with a rotating blade against the wood surface at a height of about 2 feet, and move it gradually.

However, since the wood cutter has a single-sided beam,
There is a risk that the shaft will tremble in the vertical direction, causing uneven groove depth.

As a result, a side cutter was created in which a guide bearing was attached to the outside of the rotating blade.

That is, a new bearing is installed on the outside of the rotary blade, the inner ring is placed against the end face of the rotary blade and the mounting shaft, and the washer and screw are tightly tightened from the outside.

Since the inner diameter of the inner ring and the outer diameter of the screw are almost equal, the □bearing is
It is fixed at a rotationally symmetrical position with respect to the center line of the mounting shaft.

As a matter of fact, the shaft centerline and the bearing centerline almost coincide.

When viewed from the rotating blade, the shaft is almost in a state of having both ends.

This is because the bearing outer ring rolls on the wood surface and receives support from the wood surface.

A further advantage is that the uniformity of groove depth is improved.

The depth of the groove is half the difference between the rotary blade and the guide bearing.

To cut grooves of extremely deep depths, it is necessary to have rotary blades of different diameters or guide bearings of different diameters.

The width of the groove is equal to the blade width of the rotary blade.

Various types of rotary blades and bearings in terms of depth and width. The fewer tools you have, the better.

If there is only one type of bearing, the rotating blade will be deep and Only the product EF of the number of stages E and F is required.

Furthermore, even if the diameter of the rotary blade is constant, F blades with different axes are prepared, and E bearings are arranged, grooves of the same depth and width can be cut.

This one has 11 parts points 1 1
.

There are few.

Therefore, the diameter of the rotary blade is fixed, and the depth of the groove is adjusted and the diameter of the guide bearing is changed.

First, eight types of bearings with different outer diameters are available.

In the case of a small diameter bearing, the center may be supported by a screw as described above.

This is because there is a lot of rattling.

However, if the center of the inner diameter of a bearing with a large external diameter is supported by a screw, it may flex to the left or right with respect to the rotating surface.

Since the ratio of the inner diameter to the outer diameter of the screw, which is approximately equal to the screw diameter, is small, the supporting force is poor.

Bearings with a larger outer diameter often have larger balls than bearings with a smaller diameter.

If the balls are large, the thickness of the bearing will increase.

Regardless of the size of the outer diameter, the thickness of the bearing must be the same in order to be able to press the rotary blade against the end face of the shaft and fix it with a screw.

The size of the 1-repoll remains almost unchanged.

This means that there is no suitable standard product.

The present invention aims to solve these difficulties.

The woodworking side cutter of this invention has a large diameter guide bearing.
The inner diameter is also wide, and the boss of the rotary blade is stepped, making the inner diameter of the bearing equal to the outer diameter of the boss.

The bearing is fitted into the boss, and the inner ring of the bearing is sandwiched between a step and a washer and fixed under strong pressure.

It is not supported by screws, but supported by the boss of the rotary blade.

This is its characteristic. Of course, for small diameter bearings, the center is specified by the outside diameter of the screw as before.

Embodiments will be described below with reference to drawings showing examples.

FIG. 1 is a perspective view showing how the side cutter for woodworking is used.

The cutter 1 is attached to the rotating shaft of the electric motor M (bump trimmer 1, haunch router, router machine) through a chuck, etc.
The shaft is attached.

A work plate P is provided in front of the electric motor M.

The wood H to be processed is slid on the work plate P while cutting grooves with a cutter.

FIG. 2 is an enlarged sectional view of the vicinity of the cutter.

The wood H to be processed comes into contact with the work plate PvC, and is also restricted from coming into contact with the bearing 3.

The depth of the groove is determined by the radius of the rotary blade 1 and the radius of the bearing 3.

A front view and a right side view of a woodworking side cover and ivy according to an embodiment of the present invention are shown in FIGS. 3 and 4.

FIG. 5 is a rear view of only the rotary blade.

FIG. 6 is a partially enlarged sectional view of the vicinity of the rotary blade when a small diameter bearing is attached.

This is only a known mounting structure. 1. The mounting structure of Zuko will be explained.

The rotary blade 1 is screwed onto one end of the mounting shaft 2.

The end surfaces of the rotary blade 1 and the mounting shaft 2 are substantially on the same surface.

We will do it face-to-face.

The bearing 3 is fixed to the mounting shaft 2 and the end face of the rotary blade 1 with mounting screws 4.

A flat washer 5 and a spring washer 6 are interposed between the bearing 3 and the head of the mounting screw 4.

The rotary blade 1 has four pieces of blade body 7 on the outer periphery.

The blade I is fixed to the outer end of the spiral body 8.

At the center of the main body 8 is a thick boss portion 9.

A female thread is cut into the inner surface of the boss portion 9. The mounting shaft 2 is
An axial screw mounting screw hole 15 is bored in one end surface of the long right circular cylinder 75.

On the other hand, a blade attachment screw 16 is cut into the outer periphery.

A flange portion 17 is formed inside the blade mounting screw 16.

The bearing 3 includes an inner ring 11, balls 12, an outer ring 13, and an outer ring case 14.

This is a known bearing. Explain the installation procedure.

The blade mounting screw 16 of the mounting shaft 2 is screwed into the boss portion 9 of the rotary blade 1 and is fixed by applying it to the collar portion 17.

The end surfaces of the rotary blade 1 and the mounting shaft 2 are almost flush.

Next, the bearing 3, washer 5, and spring washer 6 are placed on the end face, and the mounting screw 4 is passed through and screwed into the screw hole 15.

The inner ring 11 of the bearing 3 is pressed down on both sides, and its axis is regulated by screws.

The above configuration is publicly known.

The feature of the present invention is that the bearing with a larger outer diameter is supported by the boss of the rotary blade.

An embodiment of the present invention will be explained with reference to FIG.

The point that the boss portion 9 of the rotary blade 1 is screwed onto the mounting mechanism 2 remains unchanged.

A reduced diameter portion and a stepped portion 18 are formed on the outside of the boss portion 9 of the rotary blade 1.

The large-diameter bearing 3 has a wide inner diameter, and the inner circumference or a portion thereof is fitted into the boss portion.

The inner circumferential shell of the bearing no longer touches the drop surface of the screw 4.

The inner ring 11 of the bearing has a washer 5 and a boss part 9 of the rotary blade on both sides.
9 is clamped by the latitudinal part 18.

The center of the bearing is equal to the centerline of the rotating blade.

The inner periphery of the bearing is precisely defined by the boss portion 9.

Since we decided to fix it at the boss part, we can use the same screw 4 and increase the thickness of the bearing even though the distance between the screw part and the end plate of the mounting shaft is the same.

Increasing the thickness can prevent deflection in the direction perpendicular to the axis.

If it's thicker, you can use larger bearing balls.

Bearing sets whose thickness increases in proportion to the outside diameter are readily available.

This is because they are sold as standard products.

The depth G of the groove is the diameter Q between the tips of the blade body I of the rotary blade 1,
This is half the difference in diameter S of the bearing 3.

That is, G-(Q-8)/2 is given by

By varying the diameter Q of the blade or the diameter S of the bearing, the depth G of the kerf can be set arbitrarily to some extent.

The width T of the groove is equal to the thickness T of the blade body of the rotary blade.

In the end, the depth 01 width T of the groove can be given discretely by preparing products with various diameters Q1 of the rotary blade, thickness T1 of the blade body, and diameter S of the bearing.

In this example, the blade diameter Q is constant at 32rrrrn,
We decided to stock multiple rotary blades with different thicknesses T.

7 to 10 are right side views of four rotary blades having different thicknesses.

The thickness of the boss part is constant, but the thickness of the blade body is different.

The thickness of the blade body of Examples A, B, C, and D is A 3.0 cabinet B 4.5 key C5, Orran D6.0rIrrrL It is.

All have a reduced diameter boss portion and step portion 18 for fitting a large diameter bearing.

On the other hand, examples of bearings having different outer diameters S are shown in FIGS. 11 and 14.

In this example, the outer diameters of bearings x, y, z, and w are X 13mmφ Y 16m+nφ Z 22y++mφ W 26 cabinetφ It is.

The two bearings X and Y, which have small outer diameters, also have small inner diameters, which are 4 mm, which is the same as the screw diameter.

The mounting structure shown in FIG. 6 is adopted.

The two bearings with larger outer diameters also have larger inner diameters, each having a diameter of 10 mm to fit into the boss of the rotary blade.

This corresponds to the embodiment of the present invention shown in FIG.

The depth G of the groove is 9.5 mm, 8.
3.0rran to 0mm, 5° image.

The effects are as follows.

With the woodworking side cutter of the present invention, it is possible to precisely cut grooves in materials such as wood, plywood, vertical board, and plastic.

This is because the bearing rolls on the material surface.

Since the bearing with a large outer diameter is fitted and fixed into the boss part of the rotary blade, it can be made sufficiently thick.

Also, because it fits into the boss, there is less lateral deflection and it is more stable than one that fits into a screw.

As a drive mechanism, it is possible to use Nday trimmer, Nday router, Router Majiz, etc., and it has a wide range of versatility.

When the rotary blade is installed on the shaft, the end face is flush with the shaft, and since the boss of the rotary blade has a step, both large and small diameter bearings can be installed with the same screw.

This is a useful idea.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the state of use of the woodworking side cutter of the present invention, Fig. 2 is an enlarged sectional view of the vicinity of the cutter, Fig. 3 is a front view of the woodworking side cutter according to the embodiment, and Fig. 4 is the side cutter. The right side view, Figure 5, shows the back crystal of the rotating blade only.
Figure 6 is an enlarged cross-section of the rotary blade and the vicinity of the bearing [q, Figures 47 to 51. 15 is an enlarged sectional view of the rotary blade of the side cutter and the vicinity of the bearing according to the embodiment of the present invention. : 1 is the rotary blade, 2 is the mounting structure, 3 is the bearing, 4 is the mounting hiss, 5 is the washer, 6 is the spring washer, I is the blade,
8 is the main body, 9 is the boss part, 11 is the inner ring, 12 is the ball, 1
3 is the outer ring, 14 is the outer ring case, 15 is the screw mounting hole, 1
6 is the blade mounting screw 1, 17 is the flange, and 18 is the step. :; ・

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Outer ring force consisting of a rotary blade 1, a mounting shaft 2 that fixes the rotary blade 1 at one end, an inner ring and an outer ring: a rotary blade 1 with a smaller diameter than the rotary blade 1 and directed toward the inner gutter. Fix the bearings 3' and ffi, which are fixed to the mounting shaft 2 and the rotary blade 1 on the outside, and the inner ring of the bearing 3 and install! In a side cutter for woodworking, which consists of a mounting screw screwed into the mounting screw hole 15□ on the end face of 12, Q, and 4, the bearing 3 has a stepped portion 18' on the boss portion 9 of the rotary blade 1. This side cutter for woodworking is characterized in that an inner ring 11 is fitted into a boss part 9, sandwiched between a stepped part 18 and a large-diameter washer 5, and fixed with a mounting screw 4. 2 The outer end surfaces of the rotary blade 1 and the mounting shaft 2 are flush with each other,
This side cutter for woodworking is characterized in that the side surface of the inner ring of a small-diameter bearing 3 is sandwiched between a rotary blade, the outer end surface of a mounting shaft, and a washer 5, and fixed with a mounting pin 4. □ ゛