JPS5885771A - Screen made of resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in resin screens for motorcycles, tricycles, etc.

It is well known that motorcycles and other vehicles are generally equipped with a windscreen near the handlebars at the front of the vehicle body in order to minimize the effects of rain, wind, etc. on the occupants.

Conventionally, most screens of this type have been made by heating and softening a sheet of polyethylene thermoplastic resin (a plate-shaped material) molded by calender molding or extrusion molding, and then bending this sheet in the same way as the product. After clamping in a mold having a uniform rate, the sheet is adsorbed to the mold by creating a vacuum between the mold and the sheet, and then it is molded using the so-called vacuum forming method, in which the sheet is cooled to room temperature and hardened to form. Figure 1^.

A resin screen 1 having a predetermined shape as shown in (c) was obtained.

However, in such a conventional resin screen 1, the thickness cannot be changed due to the molding method, so the mounting part 2 where the load is most concentrated during driving is
The thickness of the screen surface main body 3 had to be the same as the thickness corresponding to the zero strength.

Therefore, the thickness of the screen main body 3 is thicker than necessary, and the weight of the resin screen 10 increases accordingly.

In addition, the above-mentioned molding method, molding v of the resin screen 1
It is necessary to trim (deburr) the periphery of the kK screen surface 4, and to machine the elongated holes 5.5 and notch holes 6.6 for mounting on the vehicle body in the mounting part 2 (during molding). Since it cannot be integrally molded), the number of processing steps increases, and furthermore, the yield of the material is poor, resulting in an increase in product cost.

This invention was made by focusing on such conventional problems, and when a resin screen is integrally formed by molding, there is a problem with the thickness of the screen main body, its attachment part, and the peripheral edge part 4 of the screen surface. The purpose is to solve the above-mentioned problems by providing differences according to functions.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in Fig. wE2, a resin screen 12 of the present invention is attached to a fairing body 1IK1 provided near the handle at the front of a vehicle body 10 of a two-wheeled vehicle.

As shown, a plate-shaped screen surface main body 13 having a predetermined size necessary for the windshield function, a mounting portion 14 formed in a band shape with a predetermined width at the lower part of the vehicle body 13, and this mounting portion 14 and a screen surface peripheral portion 15 that forms the outer contour of the screen surface main body 13.

These are the mounting part 14 and the screen self-meshing edge part 15.
．． The screen surface main body 13 is formed by successively decreasing its plate thickness.

In other words, since the mounting part 14ti is the part where the load is most concentrated during running, a sufficient plate thickness is selected to match the mounting part [K], and the cage lean surface main body 13 having a wide area reduces weight and improves transparency. It is formed as thin as possible in terms of.

On the other hand, as shown in FIG. 4, the cross section of the screen surface peripheral portion 15 is formed into a molded shape that combines two types of curves with different radii of curvature in the front-rear direction, and has a thinner wall as described above. The bending rigidity of the screen surface main body 130 while traveling is increased to prevent a decrease in visibility.

In the case of jin, the reason why the radius of one rate -0- was made different in the front and rear directions was as follows.
The aim is to make the ratio of the predetermined portion sufficiently large without increasing the wall thickness more than necessary.

In the figure, 16.16 and 17.17 are long and notched holes formed in the mounting portion 14 for mounting on the vehicle body.

Then, the resin screen 12tl is molded into a container by molding such as injection molding.

That is, as shown in FIG. 115, two molds 1. are pre-cooled and separably joined, each having an unevenness on the inner surface having the same shape as the wood screen 12 described above. If the molding material (thermoplastic resin such as polycarbonate) heated in the cylinder B and made into a fluid state is injected into the bird through the nozzle part 9, and then rapidly cooled to harden, the above-mentioned result can be obtained. As shown above, the screen surface main body 13. Mounting part 1
A resin screen 12 having a predetermined thickness change is integrally molded between the resin screen 4 and the screen surface peripheral portion 15.

Of course, the elongated hole 16.16 and the cutout hole 17.17 in the attachment part 14 are also integrally molded.

In addition, in FIG. 5, a hopper, an Ed plunger, F a tobid, a G#i heater, and H an extrusion bottle are common parts normally used in injection molding.

Furthermore, the resin screen 12 molded in this way
As shown in Figure 6, a resin screen 12 is placed on the fairing outer IIA of the fairing body 11, which is located in front of the upper body 1O and is fixed in advance to the frame etc. via a stay. After the mounting 1114 is sandwiched between the cushion 18 and the garnish 19, the long 16.16 portion of the mounting portion 14 is directly connected to the screen 1 from the fairing inner IIB as shown in FIG.
The bolt 21 and nut 22 inserted into the collar 20 penetrating through the mounting portion 141 of No. 2 are tightened and fixed, while the notch holes 17 and 17 of the mounting portion 14 are tightened. 6. As shown in Fig. 0, after the base plate 25 of the rearview mirror 24 is arranged on the garnish 9 via the seat stay 23 so that it can be tightened together, the bolts 21 and nuts 22 are tightened in the same manner as described above. It is.

In this case, it goes without saying that the tightening margin can be regulated by the length of the collar 20, and the mounting height of the resin screen 12 can be adjusted slightly by the length 16.16 and the cutout hole 17.17.

In this way, in this embodiment, the mounting part 14 on which the load is concentrated during driving is thickened, and the screen surface main body 13, which receives a relatively small load when separated from the mounting part 14, is thickened. was formed within the port, so
It is possible to obtain a resin screen 12 with good strength balance without thick walls (strength O) (-), and the weight can be reduced while effectively maintaining the mounting strength during running. In addition, as described above, while the screen surface main body 13 is made as thin as possible, the screen surface outer peripheral end 15 is formed into a molded shape to increase the bending rigidity during driving, so that the transparency is improved to a higher level. be enhanced.

Furthermore, by using the molding method described above, the resin screen 121d%ftJ can be easily integrally molded (including the long size 16.16 and cutout holes 17.17 for mounting), reducing processing time. Since the manufacturing time is shortened and the material yield is also improved, product costs can be reduced.

As explained above, according to the present invention, the resin screen is integrally formed by molding.

By adjusting the thickness of the same edge of the screen to vary depending on the required function, it is possible to reduce the thickness while effectively maintaining the mounting strength.
It is possible to provide a resin screen that has good transparency, is lightweight, and is inexpensive.

[Brief explanation of drawings]

Figure 1 (f), front view and side sectional view of the 0-ke conventional example, Figure 2
The figure is an overall side view of a motorcycle equipped with the resin screen of the present invention, @Figure 3 (f), 0 is a front view and side sectional view of one embodiment of the resin screen, and Figure 4 is Figure 3. 0
Fig. 5 is a schematic diagram of the injection molding method, Fig. 6 is a partially cutaway front view showing the installation state of the resin screen, Fig. 6 is similar to Fig. 6, 0 is Fig. 6 It is the I-1 line and I-11 sectional view of ^. 12--Resin screen% 13--Screen surface wood L14--Attachment part, 15--Screen surface same edge, position, Peng--Radius. Applicant Honda Motor Co., Ltd. Agent Patent Attorney Ikutoshi Watari Hikoichi 6th (A) (C)

Claims (1)

[Claims] 1. In a resin screen for motorcycles, tricycles, etc., the screen surface main body, the mounting portion, and the screen surface peripheral portion are integrally formed by molding, and the screen surface main body, the mounting portion, and the screen surface are integrally formed by molding. A resin screen characterized by having a difference in the thickness of one edge depending on the required function. 2. The resin screen according to claim 1, wherein the cross section of the peripheral edge of the screen surface is formed into a molded shape that is a combination of a plurality of curves having different radiuses.