JPH022692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of joining a fiber-reinforced synthetic resin pipe and a metal joint member.

2. Description of the Related Art It has been generally known to construct a portion of a vehicle drive shaft or the like from a lightweight fiber-reinforced synthetic resin tube for the purpose of weight reduction. This type of resin drive shaft has a metal joint member connected to the drive shaft and driven shaft integrated at both ends of a fiber-reinforced synthetic resin pipe, and the metal joint member is connected to the drive shaft and driven shaft during torque transmission. Stress tends to concentrate in some parts, so the resin pipe and the metal joint member need to be joined with sufficient adhesive strength.

Conventionally, as a method for joining the resin pipe and the metal joint member, the outer peripheral surface of the metal joint member is fitted to the end portion of the uncured resin pipe, and then a tape is wrapped around the outer peripheral surface of the end portion of the resin pipe. There is a method of attaching and tightening and curing the end portion at room temperature or high temperature, but this method has problems such as low adhesive strength between the resin pipe and metal joint member, and troublesome work to remove the tape after joining. There are some difficulties.

In addition, as another joining method, two tubular metal joint members are fitted onto a mandrel with a space between them, an adhesive is applied to the outer peripheral surface of the metal joint members, and then the mandrel and the joint member are connected. The resin-coated continuous fiber body is wound around the metal joint member and the mandrel while rotating together, and then cured at room temperature or at a high temperature to form the resin pipe and the metal joint member at the same time. There is a method of joining, but the adhesive tends to ooze out from between the resin pipe and metal joint member due to thermal expansion between the resin pipe and metal joint member during curing, making it impossible to obtain sufficient adhesive strength. There were other problems.

In view of the above-mentioned circumstances, the present invention provides a bonding method that eliminates the need for tape wrapping and peeling work, and prevents the adhesive from extruding during curing, thereby increasing the adhesive strength between a resin pipe and a metal joint member. The present invention provides a fiber-reinforced synthetic resin pipe in which a resin-coated continuous fiber body is wound around a metal joint member and the metal joint member is joined to the end of the pipe body at the same time as the pipe body is formed. and a metal joint member, which is characterized in that a fiber braided body impregnated with an adhesive is wrapped around the outer peripheral surface of the metal joint member, and then a resin-coated continuous fiber body is wrapped around the outer peripheral surface of the metal joint member. It is.

Hereinafter, a case will be described in which the present invention is applied to manufacture a vehicle drive shaft.

FIG. 1 is an explanatory view showing a method for manufacturing a drive shaft, and FIG. 2 is a half-enlarged sectional view showing a joined state of a fiber-reinforced synthetic resin pipe and a metal joint member.

First, as shown in FIG. 1, tubular metal joint members 2, 2 are fitted onto the mandrel 1 at appropriate intervals, and auxiliary sleeves 3 are attached to the inner ends of each of the metal joint members 2, 2. , 3, and position and fix the metal joint member 2 and the auxiliary sleeve 3.

As shown in FIG. 2, a female spline 4 is formed on the inner peripheral surface of the metal joint member 2 to be coupled to a driving shaft or a driven shaft, and the auxiliary sleeve 3 is formed on the outer peripheral surface of the metal joint member 2. The mandrel 1 is formed into a truncated conical shape so as to gently connect the mandrel 1 and the outer periphery of the mandrel 1.

Next, the fiber braided body 5 impregnated with an adhesive is wrapped around the outer circumferential surface of the metal joint member 2 and the outer circumferential surface of the auxiliary sleeve 3, respectively.

The fiber braided body 5 is preferably a braided body made of glass fiber or the like impregnated and dried with an epoxy adhesive modified with nitrile rubber or the like, which hardens after the reinforced synthetic resin forming the tube body hardens. The adhesive must be of a type that

Next, the mandrel 1 is rotated, and a resin-coated continuous fiber body 6 is formed between both metal joint members 2, 2.
It is wound while reciprocating in the left and right direction.

The continuous fiber body 6 may be made of glass, metal, synthetic fiber, etc., such as a single filament, wire, roving,
A material in the form of thread, tape, etc. is used, and as the coating resin, polyester resin, epoxy resin, acrylic resin, etc. are used.

As shown by the imaginary lines in FIG. 1, after forming the continuous fiber body 6 into a tube body 7 by winding it to a predetermined thickness, the tube body 7 is heated under high temperature.
and harden the adhesive, and simultaneously form the fiber-reinforced synthetic resin pipe 8 and the metal joint member 2 and the auxiliary sleeve 3.
Perform the joining.

During curing, the metal joint member 2, auxiliary sleeve 3, and tube body 7 each thermally expand and try to push out the adhesive toward both left and right end surfaces of the metal joint member 2 or auxiliary sleeve 3, but the adhesive is fiber braided body 5
The flow is prevented by the mesh etc., and the fiber-reinforced synthetic resin pipe 8, the metal joint member 2, and the auxiliary sleeve 3 are bonded together with an appropriate amount of adhesive layer, and the bond strength is significantly increased compared to the conventional method. .

After curing, the mandrel 1 is pulled out to complete the manufacture of the vehicle drive shaft.

In the embodiment, a tubular member was used as the metal joint member 2, but the shape of the metal joint member 2 is arbitrary.

As is clear from the above, according to the present invention, the fiber-reinforced synthetic resin pipe and the metal joint member are bonded together with an appropriate amount of adhesive layer, so that the adhesive strength is increased and the resin pipe and the joint member are bonded. The strength of the part can be greatly increased, and it can also be used to wrap the traditional tape,
It exhibits a number of excellent effects, such as superior workability as no peeling work is required, and a simple bonding method.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram for manufacturing a drive shaft according to the present invention, and FIG. 2 is an enlarged half sectional view showing a joined state of a fiber-reinforced synthetic resin pipe and a metal joint member. In the drawings, 1 is a mandrel, 2 is a metal joint member, 3 is an auxiliary sleeve, 5 is a fiber braided body, and 6 is a continuous fiber body.

[Claims]

1 One end of a net-like cylinder made of any flexible thermoplastic string material is bundled into a truncated conical shape, and the bundled part 3 is melted by an appropriate means to form a film, which is then bundled into the film. 1. A method for manufacturing a tube-shaped packaging bag, which comprises integrally fusing an end portion of a net-shaped cylindrical body to form a bowl-bottom shape centered on the thin film at one end of the net-shaped cylindrical body. 2. The tube-shaped packaging according to claim 1, in which the heating step presses the heating device and at the same time advances a small rod incorporated in the center of the heating plate to form a film with small holes in the center. How to make bags. 3. The method for manufacturing a tube-shaped packaging bag according to claim 1, wherein the step of converging one end portion of the net tube is to scrape the converging portion 3 of the net tube into the hollow top of the receiving mold 10 in a U-turn shape.