JPS60145814A - Method of molding mark for positioning at time when hose is fitted - Google Patents

Abstract

PURPOSE:To form the titled mark positively at low cost at the same time when a hose material is subjected to vulcanization treatment, by providing a projection for forming a mark on the stopping side of a core that is used for vulcanization treatment. CONSTITUTION:For example, a filler hose 9 to be connected to a fuel tank is formed as follows. A projection 27 is formed on a stopping side 25 of a core 23 having a desired bent shape. Then a cylindrical material 21 prepared by extruding raw rubber material into a certain length is moved along the outer side of the core 23 until the end surface of the material 21 abuts against the side 25, and therefore a recess 29 is formed in the end surface of the material 21 by the projection 27. Then in this state, after they are introduced in a vulcanizing furnace to vulcanize the material 21, the core 23 is removed to obtain a filler hose 9 having the recess 29 that serves as a positioning mark.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming positioning marks when fitting hoses together.

The fuel hoses, radiator ports, heater hoses, air cleaner hoses, etc. used for piping inside the car body have a specific shape so that they can be installed and removed at specific points in narrow parts of the car body. It must be molded into a shape and inserted and fixed in a defined position. Therefore, when inserting a hose into a mating component, if the fitting position is misaligned and the hose is inserted in a twisted state, the hose may interfere with other components, or unevenness may occur on the surface of the hose, resulting in a change in the cross-sectional area of the flow path. Problems such as a change in flow rate and leakage from the fitting part occurred.

To solve the above-mentioned problem, conventionally, the insertion end of the hose was marked with paint to clarify the proper position, thereby preventing the hose from being twisted when attached to the port.

However, in order to apply the paint, it is necessary to set the hose in a jig after it has been formed, and then apply the paint after determining the one-position relationship, which increases costs due to increased man-hours. Accurate position display (
−) had a defect that could not be resolved.

The present invention has been proposed in order to improve the above-mentioned problems, and involves performing hardening treatment while inserting a cylindrical hose tube before hardening treatment into a rod-shaped core metal molded into a desired bent shape. By "2" on the end of the bose is shaped to follow the desired bend shape.

In the method of forming a "1" mark for positioning in the circumferential direction with respect to the mating member to be fitted, a convex part or a convex part is formed on the stop side of the core bar that comes into contact with the end surface of the cylindrical hose material. and press the cylindrical hose material against the gate or convex part to form a convex part or four parts marked with 1" for positioning the hose in the circumferential direction when fitting the hose to a mating member. For positioning when fitting hoses, featuring
The gist is the molding method marked with 1.

According to the present invention, the four parts or convex parts that serve as the 11 marks for positioning the hose in the circumferential direction when the hose is fitted into a mating part are molded at the same time as the hose, so that painting, which was conventionally done, is possible. It is not necessary to display a landmark by using the method, which reduces man-hours and costs, and has the effect of displaying a landmark at an accurate position.

An embodiment in which the present invention is applied to a 7-well hose for a vehicle will be described in detail below with reference to FIGS. 1 to 4.

Reference numeral 1 denotes a fuel tank, which stores fuel and is mounted and supported at the lower part of the vehicle body. Numeral 5 is a filler neck, which has a fuel filler port 6 in a side portion 8 of the vehicle body and is supported by several filler necks on the vehicle body. A breather hose 7 and a filler hose 9 connect the fuel tank 1 and the filler neck 5, respectively.

11 and 13 are grommets, respectively, and breather hose 7
and the filler hose 9 is fitted into the vehicle body sheet metal fitting part,
It protects the breather hose 7 and filler hose 9 from coming into contact with the sheet metal. 15. Clamps 17 are inserted into each end of the breather hose 7 and the filler hose 9, and are connected to the fuel tank 1 and the filler neck 5.
Tighten the breather port 7 and filler hose 9 inserted into the

1 for positioning the filler hose 90 in the circumferential direction when fitting the filler hose 9 to the fuel tank 1 in the above
” The method for forming the mark will be explained below.

By extrusion molding, raw rubber is formed into a cylindrical material 21 which is a cylindrical hose material having a certain length.

Since the circular 11-shaped material 21 is made of raw rubber, it is in a soft and deformable state.

Next, the cylindrical material 21 is inserted into the rod-shaped eave 26 formed into the desired bent shape of the filler hose 9. Since the circular f71-shaped thread 21 shown by the solid line in FIG. 4 is made of raw rubber and can be deformed freely, the circular 11-shaped thread 21 is deformed along the shape of the U and gold 23.

It is inserted in the state shown by the two-dot chain line in FIG.

In the state of the above-mentioned cylindrical material 21 shown by the two-dot chain line, the 11-width side portion 25 of the 5U gold 26 that comes into contact with the end surface of the 2-cylindrical material 21
Since a convex portion 27 is provided in the convex portion 27, the cylindrical material 21 is pressed against the convex portion 27, and a concave portion 29 is formed on the end face of the two cylindrical moons 21. The cylindrical material 21 is set on the core metal in the state shown by the two-dot chain line in FIG. 4 above. As shown in FIG.
There are four locations that are partially cut out in the radial direction from the outer periphery of the end face.

The protrusion 27 is a protrusion with a rectangular cross section provided at a position corresponding to the four parts 29.

Next, the cylindrical material 21 set on the core bar 23 is placed in a vulcanization furnace and subjected to vulcanization treatment. Through the vulcanization process, the cylindrical material 21 in a raw rubber state is vulcanized in a shape that follows the shape of the core metal 23, and is formed into a rigid and elastic rubber hose.At the same time, the end surface of the cylindrical material 21 is Four parts 29 are molded as marks for positioning.After the vulcanization process, the core metal 23 is removed and the filler hose 9 is manufactured.

According to an embodiment of the present invention, the convex portion 27 provided on the end portion 25 of the core metal 26 during the side vulcanization process of the filler hose 9 forms a four-part portion 29 at the end “m” of the filler hose 9. Therefore, there is no need for the conventional drawing board using paint, which reduces the number of man-hours and costs, and provides the effect of accurate positioning.

According to one embodiment of the present invention, a convex portion that can engage with a recess 29 formed in a J shape on the end face of the filler hose 9 is provided at the fitting portion of the fuel tank 1, which is the other component to which the filler hose 9 is fitted. The provision of a shaped portion has the effect of acting not only as a position indicating mark but also as a rotation stopper.

The four parts 29 provided on the end face of the filler hose 9 according to an embodiment of the present invention have a shape with a part cut out in the radial direction as shown in FIG. Even with the four parts 29' having the same shape, the same effect as in the second embodiment of the present invention can be achieved.

Furthermore, according to one embodiment of the present invention, the filler hose 9 is provided with four portions 29, but an open portion is provided on the IL side portion 25 so as to form a convex portion on the filler hose 9. Even if a convex portion is provided on the filler hose 9 at the same time as the molding, the same effect as in the embodiment of the present invention can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory view showing an example of use of a filler hose molded according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing an example of use. 1... Fuel tank, 3... Filler neck 9゛°
・Filler hose, 21... Cylindrical material 23... Core metal, 25... Stop side portion 27... Convex portion, 29... Concave portion Fig. 2 Fig. 3 Fig. 5

Claims (1)

[Claims] A cylindrical hose material before hardening is inserted into a rod-shaped core metal formed into a desired bent shape. In the method of forming a mark 18; positioning river 1 in the circumferential direction with respect to the mating member to be mated on the end of the hose which is formed into a shape along the desired bent shape by performing a hardening treatment, the above-mentioned On the stop side of the core bar that comes into contact with the end surface of the cylindrical pose cable material. For positioning the hose in the circumferential direction when fitting the hose to a mating member by molding a concave part or a convex part and pressing the above-mentioned cylindrical pose material against the same portal part or convex part [convex part marked with 1] Or "1 mark molding method" for positioning when fitting a hose, which is characterized by molding four parts.