JPH02169381A - Binder for bicycle bonding frame and frame structure therewith as well as manufacture thereof - Google Patents

Abstract

PURPOSE:To improve the productivity and reliability of a bonding frame structure by reactively hardening a bonding agent under specified temperature after applying the bonding agent containing a specified main agent, a harder and a rubber ingredient or the like each to a lag and a pipe respectively. CONSTITUTION:At the time of manufacture, first a lag 1 is sanded by a wire brush and, after being degreased and washed up, bisphenol A epoxy resin or the like as a main agent, dicyandiamide as a hardener, 3-30wt.% of NBR to SBR or the like as a rubber ingredient, and a bonding agent of less than 500ppm of corrosive material content of a chlorine ion or the like are applied to a surface of the projection part 4. Next, a form memory ring 3 to be made of form memory material is inserted into a groove of the projection part 4. Successively a pipe 2 is inserted into the projection part 4, while each form memory ring 3 and a fin projection 5 and a ring groove 6 are made contact with one another. Then, the bonding agent is reactively hardened in a furnace in a temperature of 60-150 deg.C, thus a frame structure is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bicycle frame formed by joining pipe members using an adhesive.

Conventional technology Bicycle frames traditionally consist of brazed steel pipes.
They are manufactured using processes such as resistance welding, but with the recent development of new materials, materials such as aluminum alloys and fiber-reinforced plastics have begun to be used to reduce the weight of frames.

However, when conventional processes are applied to such new materials, the materials deteriorate due to high heat, so lightweight frames are manufactured by adhesive bonding using adhesives. Production of bicycle frames using this adhesive method does not require large equipment such as conventional welding machines (and also simplifies the process.
There are major benefits such as improved working environment.
It is becoming the mainstream of future bicycle manufacturing processes.

Problems to be Solved by the Invention However, there are currently no industrial standards for bonding using adhesives alone, such as reliability and aging, which are problems with common adhesives. With an emphasis on safety, mechanical bonding using screws, rivets, etc. and adhesives are used in combination.

However, these methods not only complicate the manufacturing process, but although mechanical joining is possible, stress concentration occurs at the locations where rivets are used, and the protruding ends of screws, rings, etc. cause damage to the adhesive layer during insertion. This reduces the bonding strength at the interface, which is a traditional feature of adhesives, such as peeling off and the inability to maintain a constant clearance. Furthermore, as a result of the creation of a space in the adhesive layer, moisture may penetrate into the space in a market environment, causing corrosion at the interface to progress and reducing reliability.

In view of the above problems, it is an object of the present invention to provide an adhesive structure and a bicycle frame using an adhesive, which emphasizes safety and has excellent productivity while taking advantage of the inherent characteristics of adhesives. .

Means for Solving the Problems In order to achieve the above object, the first invention uses a bisphenol A type epoxy resin or a novolac type epoxy resin as the main resin, uses dicyandiamide as a curing agent, and uses a rubber component as a rubber component. It is a mixture of NBR or SBR, or one of these, one of the glycol types, and a gelcol type epoxy resin from 3% to 30% by weight, and the content of corrosive substances such as chlorine ions is 500ppm or less. A second invention is an adhesive material for a bicycle adhesive frame, in which the main agent is bisphenol A type epoxy resin or novolac type epoxy resin, dicyandiamide is used as a hardening agent, and the rubber component is NBR, SBR, or Either of these and glycol type epoxy resin, 3
By weight part to 30 parts by weight or less.

A bicycle adhesive frame adhesive material containing 500 ppm or less of corrosive substances such as chlorine ions is used as a matrix, and aluminum powder is 50% by weight or less and 3% by weight or more, or Si02 is 30% by weight or less and 3% by weight or more, or
50% by weight mixture of aluminum powder and S+02 powder
This is an adhesive material for a bicycle adhesive frame made by mixing 3 or more of the above in an amount of % or more. It has a tapered rack part, and has a fin-shaped protrusion on its surface with an outer diameter larger than the inner diameter of the pipe from the root of the lug part to the tip. The contact surface has annular grooves facing each other, a shape memory metal ring is provided in one of the annular grooves, and the main agent is bisphenol A type epoxy resin or novolac type epoxy resin on the contact surface between the pipe material and the rack material. It is an epoxy resin, using dicyandiamide as a curing agent, and 3% by weight of an epoxy resin of NBR to SBR, or one of these and a glycol type, using dicyandiamide as a curing agent.
A fourth aspect of the present invention is a bicycle adhesive frame structure having an adhesive for a bicycle mounting frame, which is made by mixing not more than 30% by weight of chlorine ions and has a content of corrosive substances such as chlorine ions of not more than 500 ppm. The tapered rack part has a tapered rack part in which the outer diameter of the protruding part gradually decreases from the pipe inner diameter as it goes from the lug part to the tip of the lug part, and a fin-shaped protrusion part having an outer diameter larger than the pipe inner diameter is provided on the surface of the tapered rack part. From the root of the lug part to the tip, there is one or more annular grooves facing each other on the contact surface of the pipe material and the lug material, and a shape memory metal ring is provided in one of the annular grooves, and the pipe material The main agent on the contact surface between the rack material and the rack material is bisphenol A type epoxy resin or novolac type epoxy resin, and the hardening corrosion content is 500 ppm.
The following adhesive material for bicycle adhesive frames is used as a matrix, aluminum powder is 50% by weight or less and 3% by weight or more, or SiO2 is 30% by weight or less and 3% by weight or more,
Alternatively, there is a bicycle adhesive frame structure having an adhesive of an adhesive material for a bicycle adhesive frame made of a mixture of aluminum powder and SiO□ powder in an amount of 50% by weight or more and 3% by weight or more; Use a sandbrush or wire brush to clean the surface where the adhesive will be applied.
After removing the surface oxide film and rubbing sufficiently to increase the bonding area to expose a new metal surface, this is thoroughly cleaned with a solvent such as Tosoclen. After drying,
The main agent on the surface-treated contact surfaces such as lug members and pipe members is bisphenol A type epoxy resin, or
It is a novolak type epoxy resin, using dicyandiamide as a hardening agent, and NBR or SB as a rubber component.
R, or a bicycle adhesive made by mixing 3% to 30% by weight of either of these, a glycol type, and a gelcol type epoxy resin, with a content of corrosive substances such as chlorine ions of 500 ppm or less. Frame adhesive material or main agent is bisphenol A
type epoxy resin or novolak type epoxy resin, using dicyandiamide as a curing agent, and using NBR or SBR as a rubber component, or either of these and a glycol type, and a glycol type epoxy resin. Madnox is an adhesive material for bicycle adhesive frames, which is a mixture of 3 parts by weight to 30 parts by weight or less and has a corrosive content such as chlorine ions of 500 ppm or less, and 50% by weight of aluminum powder.
Apply an adhesive material for a bicycle mounting frame made of a mixture of not less than 3% by weight or less than 30% by weight of SiO2, or not less than 3% by weight of SiO2, or not less than 50% by weight and not less than 3% by weight of a mixture of aluminum powder and SiO2 powder. , After joining them, heat the glued bicycle frame to 60℃ to 150℃.
This invention provides a method for manufacturing a bicycle with an attached frame structure, in which the bicycle is placed in a furnace and cured by reaction.

Function In the first invention, the bisphenol A type epoxy resin or the novolac type epoxy resin acts as a base agent, and the dicyandiamide acts as a curing agent. N
The BR5BR1 and glycol type epoxy resins act as rubber components.

In the second invention, the bisphenol A type epoxy resin or the novolac type epoxy resin acts as a base agent, and the dicyandiamide acts as a curing agent.

NBR, 5BR1 or glycol type epoxy resin acts as a rubber component, while AI powder acts as a reinforcing agent for the base polymer.

In the third invention, the fin-shaped protrusion having an outer diameter larger than the inner diameter of the pipe serves to mechanically fix the pipe material and the wrap portion, and the shape memory metal ring, the lug portion, and the pipe portion are fixed together. It acts as a mechanical fixer.

In the fourth invention, the fin-shaped protrusion and the shape memory alloy metal ring function to mechanically integrate the pipe material and the lug member. The adhesive acts to mechanically bond the lug portion and the pipe member.

In the fifth aspect of the present invention, washing the joint surface with triclean after thoroughly rubbing the joint surface to expose a new surface has the effect of sufficiently adhering the pipe material and the lug material. The adhesive acts to bond the pipe material and the lug material.

EXAMPLE 500 g of bisphenol A type epoxy, 50 g of dicyandiamide, and 10 wt % of NBR were mixed and applied to the adhesive part of a bicycle mounting frame structure, and the pipe and rack parts were joined. After reaction-curing this, 60℃
It was left in a humidity chamber at 90 RH and removed after 1,000 hours, and repeated twisting motions were applied to the joint between the pipe section and the lug section, and comparisons were made with conventional adhesives. At this time, novolak type epoxy was also used as the epoxy material. The results are shown in the table in Figure 1.

It can be seen that it shows. Similarly, SBR and glycol type niboxy resin were used as the rubber component, but almost the same results as in Table 1 were obtained. Furthermore, when the rubber component was 3% by weight or less and 30% by weight, and when the corrosive components such as chlorine ions were 500 ppm or more, there was almost no difference from conventional adhesives.

Example 2 Using the bisphenol A type epoxy resin used in Example 1, 20 wt% aluminum powder and 10 vtt% Si02 were mixed therein, and the repeatability of the joint was investigated in the same manner as in Example. Ta. The results are shown in Table 2. At this time, a case in which 30 wt % of aluminum powder alone was mixed was also investigated.

It can be seen that it shows. Similarly, almost the same effects as shown in Table 2 were obtained when a novolak epoxy compound was used as the main ingredient, or when an SBR or glycol type epoxy resin was used.

Here, A1 powder, SiO2 powder, or A1 powder.

When the S i O 2 powder mixture was less than 3% by weight and more than 50% by weight, almost the same effect as the conventional adhesive was obtained.

Embodiment 3 In FIG. 1, a lug 1 has a tapered protrusion 4, and several fin-like protrusions 5 are provided on its surface. 3 is a shape memory ring, which is installed in a groove formed on the surface of the lug protrusion 4. 2 is a pipe material, and an annular groove 6 is provided on the inner surface thereof.

This annular groove 6 is processed so as to be located around the shape memory ring 3 when the vibrator 2 is press-fitted into the lug protrusion 4. Further, the fin-like protrusion 5 has an outer diameter slightly larger than the inner diameter of the vibrator 2. However, the outer diameter of the tip of the lug protrusion 4 is smaller than the inner diameter of the vibrator 2. The outer diameter of the ring 3 is the same as the outer diameter of the lug protrusion 4 at room temperature, but the outer diameter expands when heated by -1000 degrees, and the outer diameter does not change even after returning to room temperature. Ring 3 is made by: As for the shape, it is also possible to use a shape memory ring 3'' which is a ring cut into two, or a bimetal.

The manufacturing method of the adhesive frame bicycle according to the present invention is as follows.

After sanding the lug 1 that has been precisely cast using a cost wax method or the like with a wire brush, it is degreased and washed, and the surface of the lug protrusion 4 is coated with bisphenol A epoxy as the main agent and dicyandiamide as a hardening agent. Apply the adhesive that consists. Then, the shape memory ring 3 is inserted into the groove formed on the surface of the ring 4. On the other hand, after forming an annular groove 6 on the inner surface of the vibrator 2, the inner surface adhesive portion is sanded, degreased, and cleaned, and an adhesive is applied to the inner surface.

Next, use a device that can press in the front triangle of the frame at the same time, and press in the lug and vibrator. After wiping off any overflowing adhesive, it is heated in a constant temperature oven.

FIG. 5 shows an enlarged view of the heated oil bonding area. Since the shape memory ring 3 has an outer diameter smaller than the outer diameter of the lug protrusion 4, the adhesive will not be peeled off by the ring 6 when the pipe is press-fitted. Therefore, it becomes possible to uniformly interpose the adhesive between the rack and the vibrator. In addition, the tapered fan-shaped protrusion 5 allows the frame to be centered simply by simply press-fitting the vibrator, and after press-fitting, the rack and the vibrator are temporarily fixed, keeping the clearance of the adhesive layer constant. becomes possible. While being heated in the constant temperature bath, the shape memory ring 3 expands and is inserted into the annular groove 6 provided on the inner surface of the vibrator 2. At this time, the ring 6 is fixed between the annular groove 7 of the lug protrusion 4 and the annular groove 6 of the vibrator 2, as shown in FIG. 6, so that a mechanical connection is performed. Additionally, during this time, the adhesive is stabilized by thermosetting, resulting in a more secure connection structure.

Effects of the Invention The present invention exhibits an effect on reliability, which has been the most problematic issue in conventional adhesive frame structure bicycles, and is more than 10 times more durable than the conventional bicycle after an accelerated test. In addition, the environment in which cyclists use the bicycle is not only in extremely cold regions, but also in extremely cold areas.
It is effective in withstanding long-term use even in high temperature and humid conditions.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a bicycle lug and a pipe connection portion before connection in an embodiment of the present invention. ■...Lug, 2...Pipe, 3...
... Shape memory ring, 4 ... Lug, pipe connection part, 5 ... Fin-shaped protrusion, 6 ...
...Shape memory alignment groove.

Claims (1)

[Claims] (1) The main resin is a bisphenol A type epoxy resin or a novolac type epoxy resin, dicyandiamide is used as a hardening agent, and NBR is used as a rubber component.
or SBR, or either of these and a glycol type epoxy resin mixed from 3% to 30% by weight, and the content of corrosive substances such as chlorine ions is 500p.
pm or less (2) The main agent is bisphenol A type epoxy resin or novolak type epoxy resin, dicyandiamide is used as a hardening agent, and NB is used as a rubber component.
It is made by mixing R, SBR, or either of these with a glycol type epoxy resin from 3 parts by weight to 30 parts by weight, and the content of corrosive substances such as chlorine ions is 500%.
ppm or less adhesive material for bicycle adhesive frames as a matrix, aluminum powder up to 50% by weight or more than 3% by weight, or SiO_2 up to 30% by weight or more 3% by weight
Adhesive material for bicycle adhesive frames made of a mixture of aluminum powder and SiO_2 powder in an amount of 50% by weight or more and 3% by weight or more (3) From the base of the lug portion to the tip of the lug portion, the outside of the protruding portion It has a tapered lug portion whose diameter gradually decreases from the inner diameter of the pipe, and has at least one fin-shaped protrusion on the surface of the lug portion having an outer diameter larger than the inner diameter of the pipe from the root of the lug portion toward the distal end, and The contact surface between the pipe material and the lug material has annular grooves facing each other, one of the annular grooves is provided with a shape memory metal ring, and the contact surface between the pipe material and the lug material is made of bisphenol A type epoxy resin as the main agent. Or, it is a novolac type epoxy resin, using dicyandiamide as a curing agent, and mixing NBR or SBR as a rubber component, or either of these and a glycol type epoxy resin in an amount of 3% by weight to 30% by weight, A bicycle frame structure having an adhesive of an adhesive material for a bicycle adhesive frame having a content of corrosive substances such as chlorine ions of 500 ppm or less. (4) It has a tapered lug part in which the outer diameter of the protruding part gradually decreases from the inner diameter of the pipe as it goes from the base of the lug part to the tip of the lug part, and has an outer diameter larger than the inner diameter of the pipe on its surface. There is at least one fin-shaped protrusion extending from the base of the lug toward the tip, and the contact surface between the pipe material and the lug has annular grooves facing each other, and one of the annular grooves has a shape memory metal ring. The main agent on the contact surface between the pipe material and the lug material is bisphenol A type epoxy resin or novolac type epoxy resin, dicyandiamide is used as the curing agent, and the rubber component is NBR or SBR, or either of these. The adhesive material for bicycle frames, which is made by mixing 3 to 30 parts by weight of glycol-type epoxy resin and contains 500 ppm or less of corrosive substances such as chlorine ions, is used as a matrix, and 50 parts of aluminum powder is used as a matrix.
3% or more by weight, less than 30% by weight, or 3% or more by weight, less than 30% by weight, or aluminum powder and SiO_2
A bicycle frame structure having an adhesive of an adhesive material for a bicycle adhesive frame, which is made by mixing 50% by weight or more and 3% by weight or more of a mixture of __2 powder. (5) Use a sandbrush or wire brush to remove the oxidized film on the surface where the adhesive will be applied to the lug and pipe parts, and rub it sufficiently to increase the bonding area to create a new metal surface. After taking it out, wash it thoroughly with a solvent such as trichlene. After drying, the surface-treated contact surfaces such as lug members and pipe members are coated with bisphenol A type epoxy resin or novolak type epoxy resin as the main agent, dicyandiamide as the hardening agent, and NBR or SBR as the rubber component. Or an adhesive material for bicycle mounting frames that is made by mixing either of these with 3% to 30% by weight of glycol type epoxy resin and has a content of corrosive substances such as chlorine ions of 500ppm or less, or a main agent. is a bisphenol A type epoxy resin or a novolac type epoxy resin, using dicyandiamide as a curing agent, and containing NBR or SBR or either of these as a rubber component and a glycol type epoxy resin from 3 parts by weight. A bicycle adhesive frame adhesive material containing 30 parts by weight or less and containing 500 ppm or less of corrosive substances such as chlorine ions is used as a matrix, and 50 weight % or more of aluminum powder, or 3 weight % or more of S.
30% by weight or less of iO_2 or more than 3% by weight, or 50% by weight or more of a mixture of aluminum powder and SiO_2 powder3
A bicycle frame structure in which an adhesive material for a bicycle adhesive frame, which is a mixture of % by weight or more, is applied and bonded, and then the bonded bicycle frame is placed in a furnace at 60°C to 150°C to react and cure. manufacturing method.