Jig for pentagonal chopstick
Sep. 29/2021
I received a request from a vocational workshop for the disabled in Nagano Prefecture to make a jig because I want to commercialize pentagonal chopsticks. It seems that Kiso cypress is used, so I made a jig with a slightly thicker tip and sent it.If people with disabilities can master it, it seems that they will need two more.Drawing
1.The jig for marking the pentagon on the square blank material is slightly larger than the one made last time.
2.A 5.5mm veneer board was attached to make it easier to mark by holding it with one hand.
3.This is a jig for tapering, which is used when cutting the 4th groove in the drawing.Drawing
4.A jig that cuts the head of chopsticks at 45 degrees.
Jigs that leave for Nagano. I wish you a successful project.
Dec. 8/2019
The pentagonal chopstick is familiar in its hand and has a reputation for being very easy to hold. However, it is very difficult to cut out the correct pentagon. So I made a jig that even a layman could easily make a pentagonal chopstick.Drawing
1.The material is Bubinga bought ten years ago.
2.Since the width is only 100 mm, joint with biscuits.
3.Fix the steps with a drum sander.
4.Cut to a width of 155 mm.
5.Cut to a length of 248 mm.
6.Completed the base plate material of 155 W * 248 L * 32 t.
7.This is Makita's trimmer 3702, and It's can adjust the angle of the bit. Attach this to the trimmer base.
8.Attach a 90-degree bit and adjust the tilt so that the table surface and the bit surface are 144 degrees. In such a case, a digital protractor is convenient.
9.Cut the No.1 groove in the drawing.
10.Next, cut the groove No.3 in the drawing. First cut a 90 degree groove with a bit that was tilted 144 degrees.
11.Next, Turn over the work and cut the opposite side to complete the groove of 108 degrees.
12.Cut groove No.4 in the drawing. Apply a 5.5 mm thick wood plate to the end of the workpiece with double-sided tape because it is a tapered groove.
13.The workpiece is diagonally.
14.There was a problem here. The left side of the trimmer table is so narrow that the work piece comes off the table. This does not cut the correct taper. So I made an extension table with a veneer board.
15.The procedure is the same as in step groove No.3, but the groove depth of the part where the plate is attached is 1.5 mm.
16.The portion of the tapered groove seen from the cut side surface.
17.The groove depth of the part where the board is not attached is 7 mm.
18.Finally, cut groove No.2 in the drawing. Set the bit plane to 162 degrees.
19.Groove No.2 completed.
20.This completes four grooves.
21.From now on, make the holding plates at both ends. First of all, split.
22.Cut to a length of 155 mm.
23.Fixed side holding plate. Counterbore a 15mm for sunk the head of the bolt.
24.Next drilling a 7mm.
25.This is the moving side pressure plate. Counterbore 15 mm, and Drilling 10 mm for guide pins.
26.The side to attach the fixed side holding plate of the main body. Drill a 9 mm pilot hole at only one place. And Tap in the insert nut M6 ~ 13 L . Put a bolt and tap it so that the screw is not damaged.
27. Fix the pressure plate in one place with screw. And, drill the remaining 2 holes with a 7mm drill.
28.Expand the of 7 mm to 9 mm so that the insert nut can be inserted.
29.Counterbore 15 mm x 6.5 deep for spring insert, into the main body to which the moving pressure plate is attached.
30.Fix the pressure plate with a clamp, first Drilling a 10 mm on the left side, and Drilling a right hole with the pin inserted on the left side.
31.Drilling a 9mm in the center for M6 insert nut.
32.Oil finish each part. This assembly a holding plate to the fixed side.
33.Glue a 10 mm diameter guide pin to the moving side pressure plate. The guide pins are teak wood.
34.After inserting the guide pin, the front side of the pressure plate was finished with sandpaper.
35.Insert a compression coil spring into the 15 mm counterbore.
36.Assembly part of guide pin and coil spring.
37.Screw in the lever clamp. Assembling of the moving side pressure plate is complete.
38.This lever clamp is a bicycle part.
39.I think that It's moderately heavy and easy to use.
40.The presser plate moves when the clamp is moved left and right. And It can fix the workpiece firmly.
(Please put your mouse on the photo)
41.Mark the order of planeing with a laser.
42.Put the workpieces in the grooves in order from No.1, and planer.It's become a hexagon.
43.Template of pentagon mark to work-piece end. I happened to have an old Mombell membership card in the wood work shop, so I was able to cut it surprisingly beautiful when I cut it with a laser.
44.Pentagonal holes with a diagonal length of about 8 mm, and about 9 mm. I cut the member number part and completed the template.
45.The material is 10 mm square. Cut out the square of the rosewood.
46.Mark a pentagon on the end face of the work pices with a template.
47.I was able to mark the pentagon correctly.
48.Put the bottom of the left picture on the lower left in the first groove.and Planing it.
49.In the No.2 groove, put the side that in No.1 cut side on the right.
50.In the No.3 groove, put the side of angle 108 degrees on the under. And planing to will become a hexagonal rod.
51.Finally, in order to finish in a tapered shape, it is put in the No.4 groove and planeing each side.
52.Scraping little by little.
53.It has become a pentagonal chopstick.
54.Next, make a jig to cut the head to 45 degrees.Cut out the parts with a slide saw. Drawing Jig-2
55.There are 3 parts. Bond these together.
56.Once bonded, mark the 45 degree cut line. And cut with a slide saw.
57.It is the completion of the pentagonal pyramid jig.
58.Align the 45 cut surface of the jig with the disc sander. And if it sanding each side of a pentagon, it will become a pentagon pyramid.
The vertex is at the center. It is a beautiful chopstick head.
Used "kigatame ace" for finishing.
I think it is a good job as the first time chopstick making.
Let's challenge making chopstick with various materials!
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