JPS5830644Y2 - Cutter for chamfering - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cutter for chamfering a frame body, such as a window frame or a picture frame, which has a glass fitting groove in the frame portion.

Conventionally, as shown in FIG. 1, this type of cutter has a rotating shaft a connected to a drive means (not shown), and a guide roller b that rolls on an end surface d' of a frame d, which is a member to be chamfered. is rotatably mounted, and a blade C is attached to a position adjacent to the drive source side of the guide roller b, and when chamfering, the guide roller b is rolled along the end surface d' of the frame d. is being carried out.

However, in this method of chamfering using the end face (1') of the frame d as a reference plane, the finishing accuracy of the end face d' must be improved, and even if there is even a slight uneven surface on the end face d', the chamfering accuracy will be affected. Furthermore, in practice, in order to sufficiently finish the end face d' of the frame body d, a sophisticated technique is required and it takes time, resulting in a disadvantage that work efficiency is significantly reduced.

In addition, when chamfering both sides of the end face d', after chamfering one side, it is necessary to turn the frame d upside down or change the direction of the cutter and chamfer the remaining side. effort and time are expended.

Furthermore, when changing the chamfering form, guide rollers b with different diameters must be prepared and replaced from time to time, which is complicated.

This invention was made with the intention of solving the above problem, and includes a rotatable guide wheel that rolls in a groove parallel to the chamfered part provided on the end face of the frame.
A blade is removably attached to a position adjacent to at least one side of the guide ring, and a recess is provided in the end surface of the boss portion of the blade on the guide shaft side to enable contact between the guide ring and the blade. The first purpose is to be able to perform chamfering based on the groove regardless of the uneven surface of the end surface of the frame, and the second purpose is , the same guide ring can be used regardless of the form of chamfering, and the third objective is to bring the blade into contact with the guide ring with as little frictional contact as possible, so the frame The point is that chamfering is possible over the entire area other than the groove on the end face.

Another feature is that since blades can be formed on both sides of the guide ring, chamfering on both sides can be performed simultaneously.

Embodiments of this invention will be described below with reference to FIGS. 2 to 4.

In the figure, reference numeral 1 denotes a rotating shaft connected to a drive means (not shown), and a stepped portion 3 is formed at its tip via a flange 2.
Further, an engagement pin 4 is provided protruding from a part of the circumferential surface of the large diameter portion 3a of the stepped portion 3, and a screw 5 is provided at the tip side of the small diameter portion 3b.

Reference numeral 6.7 denotes a blade, which is composed of a boss part 8 having a keyway 8'' in a boss hole 8', and a blade part 9 having a chamfered side surface. A recess 10 is provided on the side of 8 that contacts a guide wheel 11, which will be described later, and a guide wheel that is interposed between these two blades 6 and 7 and is rotatable by a bearing 12 is provided in this recess 10. 11 bearings 12 and washers 13, 13 interposed between the double blades 6, 7 and the guide ring 11 are accommodated.

Reference numeral 14 denotes a fixture, which includes a cylindrical portion 14a that fits into a boss hole 8' provided in the boss portion 8 of one blade 7, and a nut portion 14.
b, which is screwed together with the screw 5 portion of the rotating shaft 1;
Further, an engaging pin 4 that engages with a key groove 8'' provided in a boss hole 8' of the blade 7 is provided protruding from the cylindrical portion 14a.

The cutter of this invention, which is composed of the above-mentioned members, has a rotary shaft 1
After installing one blade 6 by engaging the keyway 8'' with the retaining pin 4 protruding from the large diameter portion 3a of the blade, the guide ring 11 is placed adjacent to the blade 6 via the washer 13, and After attaching the washer 13, with the engagement pin 4 protruding from the cylindrical portion 14a of the fixture 14 engaged with the keyway 8'' of the other blade 7,
This fixture 14 is screwed in and the blade 7 is placed adjacent to the guide ring 11, and its operating mode is as shown in FIG. While rotating the rotating shaft 1 with the guide ring 11 inserted into the guide ring 16, the guide ring 11 is rolled and moved to the bottom of the glass fitting groove 16, and both sides of the frame 15 are simultaneously cut by the double blades 6 and 7. The chamfering process is performed.

In the above embodiment, the blades 6 and 7 are attached to both sides of the guide ring 11, but since these blades 6 and 7 are removable, in the case of chamfering only one side, the fourth blade
As shown in the figure, it is only necessary to attach one blade 6, and chamfering on one side can be performed in the same manner as in the previous embodiment.

As explained above, the chamfering cutter of this invention fits into the glass fitting groove 16 parallel to the chamfered part provided in the frame 15, which is a member for wave chamfering, and is inserted into the glass fitting groove 16. A recess 10 is provided in the boss portion 8 of the blades 6 and 7 adjacent to the side of the guide groove 11 that rolls along the guide groove 11.
The bearing 12, washer 13, etc. of the guide wheel 11 are housed inside, and the blades 6, 7 are brought into contact with the guide wheel 11 with as little frictional contact as possible. It is possible to chamfer accurately regardless of unevenness, and to chamfer each side equally, and it is also possible to chamfer the entire area of the end face of the frame other than the glass fitting groove 16, and when changing the chamfer shape. However, there is no need to replace the guide ring 11, and only the blades 6 and 7 need to be replaced, which saves time and effort.Furthermore, it is possible to chamfer both sides at the same time, reducing work time and labor. It has excellent effects such as being able to perform various functions, and its utility value is remarkable.

[Brief explanation of the drawing]

Figure 1 is a side view of the conventional chamfering cutter, Figure 2 is a side view of the chamfering cutter of this invention, Figure 3 is an exploded side view showing the main parts in cross section, and Figure 4 is another side view of the chamfering cutter of this invention. It is a side view showing an example. 1...Rotating shaft, 3...Stepped portion, 4...
...Engagement pin, 5...Screw, 6,7...
...Blade, 8...Boss part, 8'...Boss hole, 8"...Keyway, 9...Blade part, 1
0...Recess, 11...Guide wheel, 12
...Bearing, 14...Fixing tool, 1
4a...Cylinder part, 14b...Nut part.

Claims (1)

[Scope of utility model registration request] A guide wheel is rotatably mounted on a rotary shaft connected to a drive source and moves along a groove provided in parallel with the chamfered portion of the member to be chamfered, and the guide wheel is adjacent to at least one side of the guide wheel. A blade is removably attached to the blade, and a recess is provided at the end of the boss portion of the blade on the guide shaft side to minimize contact between the guide ring and the blade. A cutter for chamfering.