JPH0417123B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing disposable bamboo chopsticks.

Conventionally, there was a device for mass-producing disposable chopsticks that was disclosed in Japanese Utility Model Application Publication No. 55-60944, but the disposable chopsticks manufactured using this device had a dividing groove with a V-shaped cross section and a tip end. It was formed to a constant depth from the base to the proximal end, and the four corners of the long sides were flattened. However, when split bamboo chopsticks are manufactured using this device, each corner cannot be rounded, so splinters are likely to occur. Especially when bamboo is used as the material, large splinters may occur at the part split by the split groove. This is dangerous as it may hurt your hands or mouth.Furthermore, if the groove is too deep, it will be difficult to break, and if it is too shallow, it will break before use.

An object of the present invention is to solve the above-mentioned problems and provide a method for manufacturing bamboo disposable chopsticks that can be easily worked, finished bamboo chopsticks are easy to use, and can be manufactured without generating thorns.

Therefore, the feature of the present invention is that the bamboo chopsticks material with a rectangular cross section is cut by taking the thickness in the radial direction and the width in the tangential direction from bamboo having an annular cross section; The bamboo chopstick material is relatively fed in the longitudinal direction between a pair of left and right outer rotating blades having concave groove-shaped blade portions, and while rounding the left and right side corners of the bamboo chopstick material, the outer rotating blade is The blades are moved closer to each other or separated from each other to cut the tip end of the bamboo disposable chopstick material or the entirety thereof over a predetermined dimension in a tapered shape in plan view; A pair of upper and lower inner rotary blades each having a concave curved surface on both sides of the blade are arranged so that their positions are shifted from each other in the front and back direction so that the tips of the thin-tipped blades overlap when viewed from the front and rear directions. , the bamboo chopstick material and the inner rotary blade are relatively fed in the longitudinal direction of the bamboo chopstick material, and a radius is cut into a rounded chamfer shape on the center line portion of the bamboo chopstick material excluding the base end. and, at the base end, the inner rotary blade is positioned so that the thin-tipped blades are slightly spaced apart from each other when viewed from the front and rear directions, and on the extension line of the distance between the base end. The point is that the shallow groove is cut into a radiused chamfer shape.

Hereinafter, the present invention will be explained in detail based on drawings showing examples.

In Fig. 1, numeral 1 is a bamboo with an annular cross section, and the bamboo 1 has a thickness H in the radial direction, a width W in the tangential direction, and a predetermined length as shown in Fig. 2. Take the L and make bamboo chopsticks with a rectangular cross section 2
to remove wood.

Also, in Figures 2, 3, and 4, 3,
Reference numeral 3 denotes a pair of left and right external rotary blades having a circumferential concave groove-shaped blade portion 4 on the outer circumferential surface, each of which is movable towards and away from the arrow , 5. Reference numerals 6 and 6 designate a pair of upper and lower inner rotary blades having a thin-tipped blade portion 7 along the outer periphery, and both sides of the thin-tipped blade portion 7 are formed into concave curved surfaces. Each of the inner rotary blades 6, 6 can move toward and away from the arrow Y direction, that is, the thickness H direction of the material 2, and has an axis 8, which is orthogonal to the axis 5, 5 of the outer rotary blades 3, 3. Rotate around 8. moreover,
The inner rotary blades 6, 6 are installed at the rear of the intermediate part of the outer rotary blades 3, 3, and are arranged with their positions shifted from each other in the front-rear direction (the longitudinal direction of the bamboo chopstick material 2).

Therefore, in order to manufacture disposable bamboo chopsticks using the method for manufacturing disposable bamboo chopsticks according to the present invention, first, as shown in FIG. 2, the outer rotary blades 3, 3 are brought close to each other,
A predetermined distance C is set between the bottom portions 9 of the groove-shaped blade portions 4, 4. Furthermore, as shown in Figure 3,
The inner rotary blades 6, 6 are arranged so that the tips of the thin-tipped blade parts 7, 7 overlap when viewed from the front and rear directions. Then, the outer rotary blades 3, 3 and the inner rotary blades 6, 6 are sent in the direction of arrow A, or the bamboo chopstick material 2 is sent in the direction of arrow B, and the tip 10 of the bamboo chopstick material 2 is transferred to the outer rotary blade 3,
Induce during 3. Then, the length from the tip 10 of the bamboo chopstick material 2 to a predetermined dimension l is cut into a tapered shape in plan view. In other words, as shown in FIGS. 5 and 6, while rounding the corners of the left and right side surfaces 11, 11 of the bamboo chopstick material 2, the bottoms of the groove-shaped blade portions 4, 4 of the outer rotary blades 3, 3 are rounded. 9, 9 are gradually spaced apart from a predetermined distance C to a width W (in the direction of arrow E), and the distal end of the bamboo chopstick material 2 is cut into a tapered shape in a plan view. Continuing to feed the bamboo chopsticks, as shown in FIG. The corners of both left and right side surfaces 11, 11 are rounded to the base end of the disposable chopstick material 2.

Further, (returning to FIG. 5), while cutting both the left and right side surfaces 11, 11 of the bamboo chopstick material 2, the internal rotary blades 6, 6 cut into the tip 10 of the bamboo chopstick material 2. At this time, the inner rotary blades 6, 6 are arranged so that the tips of the thin-tipped blade parts 7, 7 overlap when viewed from the front and back directions, so as shown in FIGS. 7 and 8, the bamboo chopsticks A gap 14 is cut and formed in a rounded chamfer shape at the center line N portion of the material 2. Furthermore, the ninth
As shown in the figure, at the base end 15 of the bamboo chopstick material 2, the inner rotary blades 6, 6 are positioned so that the thin-tipped blade parts 7, 7 are slightly apart when viewed from the front and back direction. Shallow grooves 16, 16 are cut into the end portion 15 in a rounded chamfer shape.

Next, FIGS. 10 and 11 show the bamboo chopsticks 17 formed as described above, and the bamboo chopsticks 17 are as follows:
As shown in FIG.
As shown in the figure, the distal end is cut into a tapered shape in plan view, and a gap 14 is formed in a range excluding a predetermined range D of the proximal end 15, and a gap 14 is formed between the proximal end 15. A shallow groove 16 on the extension line of 14,
16 are formed, and the direction of the shallow grooves 16 and 16 coincides with the direction of the bamboo fibers.

Next, FIG. 12 shows that the outer rotary blades 3, 3 are gradually separated from each other over a portion excluding the base end 15,
The portion other than the base end portion 15 is tapered in plan view. Moreover, FIG. 12 shows the bamboo chopsticks 17 that are finished in a tapered shape as a whole in plan view.

Note that it is preferable that the predetermined range D of the base end portion 15 be as small as possible without interfering with the connection.

The present invention has the following significant effects.

Between the left and right sides 11 and 11 of the bamboo chopstick material 2
14 and shallow grooves 16, 16, each corner in the longitudinal direction is rounded, and each cutting surface is rounded to be smooth and can be used safely without causing splinters.

Since the tip and the entirety are cut into a tapered shape in plan view over a predetermined dimension l, the disposable bamboo chopsticks can be tapered, making it easier to pick up food and the like and to hold them in the hand.

With a pair of outer rotary blades 3, 3, the bamboo chopstick material 2
It is possible to perform both tapered cutting and radius chamfering in a plan view at the same time, and furthermore, radius chamfering of the corners of the left and right side surfaces 11, 11 can be performed continuously.

A pair of internal rotary blades 6, 6 can continuously cut and form the gap 14 and the shallow grooves 16, 16, and at the same time round the corners.

The shallow grooves 16, 16 of the base end 15 are formed on the extension line of the gap 14 and the groove direction coincides with the fiber direction of the bamboo, so that the manufactured bamboo chopsticks are easy to split and are easy to split. It is difficult for thorns to form on the ivy part.

The bamboo chopsticks produced have a rounded, tapered, supple shape, and exhibit the fine wood grain unique to bamboo, giving them an unparalleled sense of luxury.

(If the width is taken in the radial direction of the bamboo 1 and the thickness is taken in the tangential direction, there is a drawback that the conduit density, hardness and color tone of one disposable chopstick will be different between the left and right sides.) The resulting disposable chopsticks will have the same quality on the left and right sides.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the bamboo material used in the present invention, showing the wood-cut portion of the bamboo material, Figures 2 to 9 are diagrams explaining the manufacturing process, and Figure 2 is a plan view before processing Figure 3 is the same side view, Figure 4 is the same front view,
Fig. 5 is a plan view during side cutting, Fig. 6 is a front view of the Q-Q section in Fig. 5, Fig. 7 is a plan view during shallow groove cutting and side cutting, Fig. 8 is the same front view, Fig. 9 is a front view of forming shallow grooves and cutting the side surface, Fig. 10 is a front view of disposable chopsticks after processing, Fig. 11 is a plan view of the same, and Fig. 12 is a plan view of another specific example of disposable chopsticks. be. 1... Bamboo, 2... Bamboo disposable chopsticks material, 3... Outer rotating blade, 4... Concave grooved blade portion, 6... Inner rotating blade, 7...
Thin tipped blade part, 11... left and right sides, 14... between,
15... Base end portion, 16... Shallow groove, l... Predetermined dimension, H... Thickness, N... Center line, W... Width.

Claims (1)

[Claims] 1. A bamboo 1 having an annular cross section has a thickness H in the radial direction,
A bamboo chopstick material 2 having a rectangular cross section is cut with a width W in the tangential direction. First, the bamboo chopstick material 2 is fed in the longitudinal direction, and while rounding the corners of the left and right side surfaces 11, 11 of the bamboo chopstick material 2, the outer rotary blades 3, 3 are moved toward or away from each other. The tip of the disposable bamboo chopstick material 2 is cut into a tapered shape in plan view over a predetermined dimension l, and has a thin tipped blade portion 7 along the outer periphery, and both sides of the thin tipped blade portion 7 are concave. A pair of upper and lower inner rotary blades 6, 6 formed in a curved shape are arranged so that their positions are shifted from each other in the front-back direction so that the tips of the thin-tipped blade parts 7, 7 overlap when viewed from the front-back direction, The bamboo chopstick material 2 and the inner rotary blades 6, 6 are relatively sent in the longitudinal direction of the bamboo chopstick material 2, and the center line N portion of the bamboo chopstick material 2 excluding the base end 15 is moved between the bamboo chopstick material 2 and the inner rotating blades 6, 6. 14 is cut into a rounded chamfer shape, and at the base end 15, the inner rotary blades 6,
6 is positioned so that the thin-tipped blade portions 7, 7 are slightly separated from each other when viewed from the front and back direction, and the shallow grooves 16, 16 are chamfered on the extension line of the gap 14 of the proximal end portion 15. A method for manufacturing disposable bamboo chopsticks characterized by cutting and forming them into shapes.