KR100969534B1 - The bicycle frame which used the bamboo and manufacturing method of thereby - Google Patents

Abstract

PURPOSE: A bicycle frame using bamboo and a manufacturing method thereof are provided to remarkably improve ride comfort by absorbing shock using own elastic force of bamboo. CONSTITUTION: A manufacturing method of a bicycle frame using bamboo is as follows. Multiple bamboos are cut in a uniform length. The cut bamboos are cut again in a longitudinal direction to form multiple bamboo bars. The bamboo bars are dried. An adhesive is spread on the dried bamboo bars, and the bamboo bars are formed in a bicycle frame shape.

Description

Bicycle frame using bamboo and manufacturing method thereof {THE BICYCLE FRAME WHICH USED THE BAMBOO AND MANUFACTURING METHOD OF THEREBY}

The present invention relates to a method for manufacturing a bicycle frame using bamboo, which can improve riding comfort because it is environmentally friendly, light and can not only reduce shock.

In general, most bicycle frames are made of steel pipes, and thus, are not only heavy in weight, but also have a lot of trouble in performing rustproof coating, color coating, and coating coating in the painting work.

In addition, there is a problem in that the quality of the bicycle frame that requires various functions such as sports or leisure bicycles because there is no quality improvement as the user pursues the painting state.

On the other hand, in recent years, due to the development of alloy technology, aluminum alloy has been applied to a bicycle frame. The bicycle frame using the aluminum alloy can be made lightweight by making all parts of the frame made of aluminum alloy.

However, since the cost is expensive, not only the burden on the user is increased, but also the welding of parts requiring precision in manufacturing is difficult.

As a result, there is a problem that interferes with the popular dissemination of aluminum alloy bicycle.

In order to solve such a problem, only the necessary part of the frame is made of aluminum alloy, and the remaining part is made of steel as in the conventional steel-aluminum alloy combination bicycle frame to lower the manufacturing cost outside the frame (Domestic Registration No. 20-0163166) has been proposed.

However, the steel-aluminum alloy combination bicycle frame (Domestic Utility Model Publication No. 20-0163166) is not only environmentally friendly but also heavy, there is a problem that can not improve the ride comfort due to the self-impact mitigation.

The present invention was created in order to solve the above problems, it is environmentally friendly, light and not only to reduce the impact of its own to provide a method of manufacturing a bicycle frame using a bamboo that can improve the ride comfort do.

The present invention for achieving the above object is divided into a plurality of bamboo bar by cutting in the longitudinal direction again based on the cut surface of the plurality of bamboo after cutting a plurality of bamboo to a predetermined length; A capital increase step of increasing the plurality of bamboo bars divided through the division step; A drying step of drying the plurality of bamboo bars increased through the cooking step; An adhesive coating step of applying an adhesive to the plurality of bamboo bars to combine the plurality of bamboo bars dried through the drying step; It provides a method of manufacturing a bicycle frame using bamboo, comprising a; forming step of molding the plurality of bamboo bars combined by the adhesive coating step into a bicycle frame shape.

Here, the cooking step is preferably to increase the plurality of bamboo bars for 1 to 1.5 hours at a temperature of 130 ~ 150 ℃.

And, it is preferable that a drill processing step of forming a through hole by drilling in the longitudinal direction in the center of the bicycle frame formed through the molding step is further included.

In addition, there is provided a bicycle frame using bamboo, characterized in that manufactured by the manufacturing method of the bicycle frame using bamboo.

Hereinafter, a bicycle frame using the bamboo of the present invention and a manufacturing method thereof will be described in detail.

Bicycle frame using a bamboo which is an embodiment of the present invention and a method for manufacturing the same are made largely, including a dividing step, steaming step, drying step, adhesive coating step and molding step.

First, the dividing step is to cut a plurality of bamboo to a predetermined length and then to divide into a plurality of bamboo bars.

More specifically, after cutting to a certain length so as to be perpendicular to the fiber direction of bamboo having a thickness of 80 ~ 100mm and then cut in the longitudinal direction again based on the cut surface of the cut bamboo cross section width 20 ~ 30mm, cross section thickness Is divided into a plurality of bamboo bars of 7 ~ 10mm.

Meanwhile, bamboo can be used as a bamboo shoot, but is not necessarily limited thereto.

Next, the increase step is to increase the number of fraudulent bamboo bars divided through the division step.

Here, in the cooking step, the sugar bars and organic acids are discharged from the plurality of bamboo bars, and the plurality of bamboo bars at a temperature of 130 to 150 ° C. in order to improve the adhesive strength when the bamboo bars are combined. It is recommended to increase for 1.5 hours.

Next, the drying step is for drying the plurality of bamboo bars that are increased through the cooking step.

At this time, the plurality of bamboo bar is increased first, the water content is dried at a temperature of 15 ~ 20 ℃ to be 30% or less.

Then, after the distillation treatment at a temperature of 140 ~ 160 ℃ is dried for 1 to 2 days in a hot air dryer, this can be a water content of the plurality of bamboo bar 13%.

Next, the adhesive applying step is to combine the plurality of bamboo bars dried through the drying step, to apply an adhesive to the plurality of bamboo bars dried through the drying step.

In this case, since the plurality of bamboo bars are cooked for 1 to 1.5 hours at a temperature of 130 to 150 ° C. through the steaming step, the adhesive strength becomes stronger when combined with the adhesive.

Next, the molding step is for molding the plurality of bamboo bars combined through the adhesive applying step into a bicycle frame shape.

At this time, the plurality of bamboos in a flat state and then bonded by insect repellent treatment and high frequency press processing, thereby forming a bicycle frame shape such as a cube and a cube.

On the other hand, the shape of the bicycle frame is not necessarily to be molded into a cube and a cube, it may be molded into a circular shape, of course.

In addition, the bending due to the external impact is not only improved, but also lighter, as well as physical properties such as compressive strength and bending strength can be more remarkably improved in the center of the bicycle frame formed through the forming step Drilling in the longitudinal direction to form a through hole is preferably further included.

In this case, the through hole may be formed using a drill, but is not necessarily limited thereto.

Furthermore, the bicycle frame can be molded and used, for example, as an accessory such as a bicycle handle.

As described above, the present invention is environmentally friendly and light because it manufactures a bicycle frame using bamboo, and also has an advantage of remarkably improving ride comfort because of its own elasticity of the bamboo. .

The present invention is eco-friendly and light because it manufactures a bicycle frame using bamboo, and because of the self-elasticity of the bamboo can be self-impact relaxation, there is an effect that can significantly improve the riding comfort.

In addition, since a plurality of bamboo bars are increased at a temperature of 130 to 150 ° C. for 1 to 1.5 hours, sugar and organic acids are discharged from the plurality of bamboo bars, and thus the adhesive strength is improved when the bamboo bars are combined. .

In addition, since the through-hole is formed by drilling in the center of the bicycle frame formed through the molding step in the longitudinal direction, the bending due to external impact is not only improved, but also lighter, as well as physical properties such as compressive strength and bending strength. There is an effect that can be significantly improved.

Hereinafter, the bicycle frame using the bamboo of the present invention and a manufacturing method thereof will be described in more detail with reference to the following Examples, of course, the scope of the present invention is not limited to the following examples, the technical gist of the present invention Various modifications can be made by those skilled in the art without departing from the scope of the present invention.

Example 1

Ten blind porridges having a thickness of 100 mm were used.

After cutting the seed bamboo porridge to have a length of 500mm, and again in the longitudinal direction on the basis of the cut surface of the cut myeongju porridge, the outer skin is peeled, and the inner bone marrow layer is dry wood needle processing, the cross section width is 20 ~ 30mm, It was divided into 8 to 10 so as to have a plurality of bamboo bars having a cross section thickness of 7 to 10 mm.

Then, the plurality of bamboo bars were accommodated in a pot with water and then increased for 1 to 1.5 hours at a temperature of 130 ~ 150 ℃.

After drying the steamed plurality of bamboo bar at a temperature of 140 ~ 160 ℃ dried for 1 to 2 days in a warm air dryer.

Then, after applying the adhesive to the plurality of dried bamboo bar, and made into a flat state by molding to a bicycle frame having a cross-sectional diameter of 50mm by the insect repellent treatment and high frequency press processing to prepare a bamboo bicycle frame of Example 1.

[Example 2]

Unlike Example 1, the bamboo bicycle frame of Example 2 was manufactured by forming a through hole having a diameter of 6 mm by drilling in the longitudinal direction in the center of the bicycle frame.

Comparative Example 1

Unlike Example 1, a bamboo bicycle frame of Comparative Example 1 was prepared without increasing a plurality of bamboo bars.

The compressive strength, the bending strength and the weight of the bamboo bicycle frames of Examples 1, 2 and Comparative Example 1 thus prepared were measured.

At this time, each measurement was performed on 20 bamboo bicycle frames of Examples 1 and 2 and Comparative Example 1.

[Compression strength and bending strength measurement]

The compressive strength and the bending strength were measured using a static strength tester (MTS, QT / 100) to measure the average compressive strength and average bending strength of the bamboo bicycle frame of Examples 1 and 2 and the bamboo bicycle frame of Comparative Example 1 The results are shown in Table 1.

[Table 1] Average compressive strength and average bending strength measurement results

Example 1 Example 2 Comparative Example 1 Average compressive strength 32.1 MPa 29.2 MPa 24.1 MPa Average bending strength 95.8 MPa 90.3 MPa 85.3 MPa

As described above, the average compressive strength and average bending strength of the bamboo bicycle frame of Example 1 were measured to be 32.1 MPa and 95.8 MPa, respectively, and the compressive strength and average bending strength of the bamboo bicycle frame of Comparative Example 1 were 24.1 MPa, respectively. And the lowest was 85.3 MPa.

It is considered that the average compressive strength and average bending strength were measured to be the highest since the bamboo bicycle frame of Example 1 increased a plurality of bamboo bars.

[Weight measurement]

Evaluation of the weight using an electronic balance was measured the average weight of the bamboo bicycle frame of Examples 1, 2 and Comparative Example 1, the results are shown in Table 2.

Table 2 Weighing Results

Example 1 Example 2 Comparative Example 1 weight 1572 g 1513 g 1589 g

As such, the average weight of the bamboo bicycle frame of Example 2 was measured to be lightest at 1513 g.

Claims (4)

A dividing step of cutting the plurality of bamboos to a predetermined length and then cutting the plurality of bamboos in the longitudinal direction again based on the cut surfaces of the plurality of bamboos; A steaming step of increasing the plurality of bamboo bars divided through the dividing step at a temperature of 130 to 150 ° C. for 1 to 1.5 hours; A drying step of drying the plurality of bamboo bars increased through the cooking step; An adhesive coating step of applying an adhesive to the plurality of bamboo bars to combine the plurality of bamboo bars dried through the drying step; And a molding step of molding the plurality of bamboo bars combined through the adhesive applying step into a bicycle frame shape. And a drill processing step of forming a through-hole by drilling in the longitudinal direction in the center of the bicycle frame formed through the molding step. Bicycle frame using a bamboo, characterized in that produced by the manufacturing method of claim 1. delete delete