JPH04216902A - Cutting tool with guide roller - Google Patents

Abstract

PURPOSE:To execute deeper edging and chamfering without damaging a material to be cut while positively supporting a guide roller. CONSTITUTION:When a guide roller 7, in which an inner ring 7b and an outer ring 7a can be turned relatively, and a connecting member 8 penetrated into the inner ring 7b are connected and fixed to a cutter 3 by a connecting bolt 4 in the cutter 3 and an article to be cut is cutting-worked, the outer ring 7a of the guide roller 7 is brought into contact and rolled under the state in which the outer ring 7a is abutted against the article to be cut.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a cutting tool for chamfering, decorative edges, etc. on the side surfaces of wooden boards, plywood, etc. More specifically, a guide roller is attached to the tip side of a cutter portion having a blade, and This invention relates to a cutting tool with a guide roller that smoothly guides a cutter portion in the cutting direction.

0002

2. Description of the Related Art Conventionally, there is a cutting tool with a guide roller for chamfering, decorative edges, etc. on the side surfaces of wooden boards, plywood, etc., as shown in FIG. That is, the cutter section 21 has a chamfering blade 21a at the distal end of the shank 20, and a washer 2 is disposed on the distal end side.
A guide roller (ball bearing) 23 is rotatably attached to the cutter portion 2 via the guide roller 23, and a set screw 25 is attached to the tip side of the guide roller 23 via a washer 24 to prevent the guide roller 23 from coming off.
It is screwed onto 1. And the guide roller 23
By rolling the cutter part 21 on the surface to be cut,
The surface to be cut above the guide roller 23 can be chamfered smoothly and easily.

0003

However, in the conventional cutting tool with a guide roller, the guide roller 23
Since the set screw 25 that holds the screw protrudes further toward the tip side from the guide roller 23, when chamfering the step surface, it is not possible to chamfer the stepped surface as deeply as the protrusion of the set screw 25. Therefore, as a method to solve this problem, it is possible to shorten the width of the guide roller 23 or to replace the set screw 25 with a C ring having a small width to prevent the guide roller 23 from coming off. but,
In the former case, since the width of the guide roller 23 is short, the force applied to the surface to be cut via the guide roller 23 becomes extremely large per unit area. As a result, when cutting materials such as relatively soft wood boards and plywood, the guide roller 23
There was a problem where the parts where the wheels rolled were dented. Further, in the latter case, the load applied to the guide roller 23 during cutting is large and it is difficult to support this with a C ring.

The present invention has been made to solve the above-mentioned problems, and its purpose is to be able to chamfer more deeply without damaging the material to be cut, and to
To provide a cutting tool with a guide roller that can reliably support the guide roller.

[0005]

[Means for Solving the Problems] A first invention includes a cutter having a blade body, a guide roller whose inner ring and outer ring are relatively rotatable by a rotating body interposed between the inner ring and the outer ring;
A connection that is inserted into the inner ring and has a flange portion formed on the outer periphery of its tip to engage with the inner ring, a through hole in the axial direction, and a housing recess formed by widening the tip side of the through hole. The member and the head part fit into the housing recess, and the threaded part is screwed into a threaded part formed in the tip axis of the cutter through the through hole of the connecting member to connect the connecting member to the cutter. The gist thereof is that the connecting bolt is fixed and the inner ring is supported and fixed by the flange portion.

In the second invention, in addition to the first invention, a washer that engages with the inner ring is disposed between the tip of the cutter and the connecting member, and the flange of the connecting member is connected to the guide roller. The gist of this is that the inner ring of the machine is supported and fixed. In a third invention, in addition to the first invention, the gist of the third invention is that the abutting surfaces of the accommodation recess of the connecting member and the head of the connecting bolt are formed in a mutually tapered shape.

[0007]

[Operation] In the first invention, cutting is performed by guiding the cutter along the workpiece by rotatably supporting the guide roller whose inner ring and outer ring can rotate relative to each other by connecting bolts. . In the second invention, the inner ring of the guide roller is supported and fixed by the washer disposed between the cutter and the connecting member and the flange portion of the connecting member, and the outer ring is rotated via the rotating body.

[0008] In the third aspect of the invention, the contact surfaces of the accommodating recess of the connecting member and the head of the connecting bolt are tapered to each other, so that the connecting member is firmly fastened.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a edging cutter with a guide roller will be described below with reference to FIGS. 1 to 6. As shown in FIG. 1, a main body 1 of a edging cutter with a guide roller has a shank 2 and a cutter portion 3 as a cutter integrally formed, and the shank 2 is connected to a drive source (not shown), while the cutter The portion 3 is provided with two blade bodies 3a at diagonal positions. moreover,
The lower end surface of the cutter part 3 has a female thread 3b as a threaded part for screwing into a threaded part 4a of a connecting bolt 4, which will be described later.
is screwed on.

As shown in FIG. 2, the connecting bolt 4 consists of a threaded portion 4a and a head 4b, the back surface of the head 4b is tapered, and as shown in FIG. An engagement hole 5 for engaging a hexagonal wrench is bored in the front surface of 4b. The connecting bolt 4 has a threaded portion 4a screwed into a female thread 3b screwed onto the end surface of the cutter portion 3 of the main body 1, so that the guide roller 7, which will be described later, is connected to the cutter portion 3.
installed on.

As shown in FIG. 4, the guide roller 7 is composed of an outer ring 7a, an inner ring 7b, and a rotating body 7c made of a ball bearing, and the rotating body 7c is interposed between the outer ring 7a and the inner ring 7b. By doing the outer ring 7
a and the inner ring 7b can rotate relative to each other. Figure 5
As shown in FIG. 2, a metal cylindrical connecting member 8 is inserted through the inner ring 7b of the guide roller 7. A flange portion 8a bent toward the outer circumference is formed on the lower end side of the connecting member 8, and a connecting flange portion 8a is formed on the inner surface of the lower end side, that is, the contact surface with the head 4b of the connecting bolt 4. A housing recess 8b formed in the same shape as the tapered surface of the head 4b of the bolt 4 is provided. The guide roller 7 and the connecting member 8 are attached to the lower end surface of the cutter section 3 by the washer 6.
and is tightened and fixed with the connecting bolt 4.

As shown in FIG. 1, the inner ring 7b of the guide roller 7 is supported and fixed by the washer 6 that is in contact with the inner ring 7b and the flange portion 8a of the connecting member 8, and the outer ring 7a is fixed to the inner ring 7b. It allows for smooth relative rotation. Next, the functions and effects of the guide roller-equipped cutter configured as described above will be explained.

As shown in FIG. 6, when using the edging cutter with a guide roller of this embodiment to edge the side surface 9a of a wooden board 9 having a step, for example, the outer ring 7a of the guide roller 7 is moved around the edge of the wooden board 9. It is made to contact and roll while being in contact with the side surface 9a. Then, the cutter part 3 cuts the side surface 9 of the wooden board 9.
The cutter portion 3 also rotates as the shank 2 is driven to rotate. Therefore, the side surface 9a of the wooden board 9 is cut by the two blade bodies 3a provided in the cutter section 3.

At this time, since the head 4b of the connecting bolt 4 used in this embodiment is fitted into the housing recess 8b of the connecting member 8, the head 4b of the connecting bolt 4 is fitted into the housing recess 8b of the connecting member 8. The head 4b of the connecting bolt 4 does not protrude from the lower end surface of the guide roller 7, and is held substantially flush with the lower end surface of the guide roller 7. Therefore, it is possible to cut the side surface 9a of the wooden board 9 at a deeper position than before without shortening the width of the guide roller 7. Furthermore, since the width of the guide roller 7 is not short, the force per unit area of the guide roller 7 applied to the side surface 9a of the wooden board 9 during cutting is not large, and even when applied to cutting soft wooden boards, plywood, etc. It is possible to perform cutting without damaging the object, and it is also possible to reliably support the guide roller 7.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be configured as follows without departing from the spirit of the invention. (1) In the above embodiment, the cutter part 3 used for edging was used with the blade body 3a parallel to the cutting surface, but for example, as shown in FIG. The chamfering cutter 10 may be provided by providing the cutter 10 in the section 11.

(2) In the embodiment described above, the rotating body 7c of the guide roller 7 was constituted by a ball bearing, but this rotating body 7c is not limited to a ball bearing.
Any structure, such as a ring-shaped bearing, may be used as long as it can rotate smoothly. (3) In the above embodiment, the shape of the engagement hole 5 drilled in the head 4b of the connecting bolt 4 was formed in a hexagonal shape in order to engage with a hexagonal bolt. The shape of is not limited to the above embodiment, and may be a shape that can be engaged with a Phillips screwdriver, a flathead screwdriver, etc., for example.

[0017]

[Effects of the Invention] As detailed above, according to the first invention, it is possible to cut the material to be cut without damaging it, and the guide roller can be reliably supported, which is an excellent effect. . According to the second invention, in addition to the first invention, by supporting and fixing the inner ring of the guide roller by the washer and the flange portion of the connecting member, an excellent effect is achieved in that the outer ring of the guide roller can be rotated more smoothly. .

According to the third invention, in addition to the first invention,
Since the tapered head of the connecting bolt can be firmly fastened to the tapered housing recess of the connecting member, the guide roller will not wobble. Furthermore, since the head of the connecting bolt is accommodated in the housing recess of the connecting member, it has the excellent effect of being able to cut the side surface of the workpiece more deeply than conventional cutters.

[Brief explanation of the drawing]

[Fig. 1] Partial front cross-sectional view of a edging cutter with a guide roller

[Figure 2] Front view of connecting bolt

[Figure 3] Bottom view of connecting bolt

[Figure 4] Front cross-sectional view of the guide roller

[Fig. 5] Front sectional view of the connecting member

[Figure 6] Front view of a cutter with guide rollers when cutting the side surface of a wooden board

[Fig. 7] Partial front cross-sectional view of another example of a chamfering cutter with a guide roller

[Figure 8] Front view of a conventional cutting tool with guide rollers

[Explanation of symbols]

3 Cutter part 3a as a cutter Blade body 3b Female thread as threaded part 4 Connection bolt 4a Threaded part 4b Head 6 Washer 7 Guide roller 7a Outer ring 7b Inner ring 7c Rotating body 8 Connecting member 8a Flange part 8b Accommodation recess 8c Through hole

Claims (3)

[Claims] Claim 1: A cutter (3) having a blade (3a);
A rotating body (
a guide roller (7) that allows the inner ring (7b) and the outer ring (7a) to rotate relative to each other by means of a guide roller (7c); and a flange part (8a) that is inserted through the inner ring (7b) and engages with the inner ring (7b) on the outer periphery of its tip. ), and a through hole (8
c), and the connecting member (8) has a housing recess (8b) formed by expanding the distal end side of the through hole (8c), and a head (8b).
4b) is fitted into the accommodation recess (8b), and the threaded part (4a
) is formed at the tip axis of the cutter (3) through the through hole (8c) of the connecting member (8).
A guide roller consisting of a connecting bolt (4) which is screwed to connect and fix the connecting member (8) to the cutter (3) and supports and fixes the inner ring (7b) at the flange part (8a). cutting tools. [Claim 2] The tip of the cutter (3) and the connecting member (8)
A washer (6) that engages with the inner ring (7b) is disposed between the inner ring (7b) and the flange (8a) of the connecting member (8) to support and fix the inner ring (7b) of the guide roller (7). A cutting tool with a guide roller according to claim 1. 3. The cutting tool with a guide roller according to claim 1, wherein the contact surfaces of the housing recess (8b) of the connecting member (8) and the head (4b) of the connecting bolt (4) are formed in a mutually tapered shape. .