JPH0212567B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a rotary roller for a floor suction port in a vacuum cleaner or the like.

As shown in Figures 7a and 7b, the conventional rotating roller is
Brushes are flocked around a base made of a round bar with a circular cross section and several brushes flocked in a spiral (longitudinal direction), or a base made by combining multiple brush parts and protruding parts (beater parts) in a spiral shape. I was making it.

In addition, in order to form this spiral protrusion part, plastic is injected into a mold having a concave part, and each protrusion part is manufactured by integral molding, or separately from the base body 4 of the rotating roller. The protrusion 4' of the component was removed by insertion or other means. However, the former manufacturing method using injection molding requires multiple complicated split molds, and the molding time is extremely time-consuming depending on the size of the cross-sectional shape. appears on the product, making it easy for lint and dirt to adhere to it.
It was impossible to obtain something beautiful in terms of appearance.
Furthermore, the latter manufacturing method for inserting separate parts has a complicated structure due to an increase in the number of parts, processing for insertion, means for fixing, etc.

On the other hand, the cleaning effect of the brush that has bristles on the base of the rotating roller is to remove dust near the surface of the carpet, and the protrusion knocks out dust from the deep part of the carpet by hitting it. It is effective. These effects are determined by the rotational speed or circumferential speed of the rotating roller and the running speed of the floor suction port.If the rotational speed or circumferential speed and running speed are the same,
The cleaning effect is better when the number of flocked threads and the number of protrusions are larger, but in conventional injection molding, increasing the number of protrusions is difficult in terms of both mold manufacturing and molding processing. Ta.

The present invention solves these conventional drawbacks and provides a method for manufacturing a rotary roller with good performance in a short time, with a simple configuration, and at low cost. By molding an irregularly shaped mold with a concave part using a manufacturing method using rotary extrusion, processing of the base of the rotating roller is facilitated, thereby successfully reducing the cost of the entire floor suction port and improving the cleaning effect. .

An embodiment of the manufacturing method of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a rotary roller manufactured by the manufacturing method of the present invention, in which brushes are implanted on the base of the rotary roller, and FIG. 1 is a perspective view of a floor suction port employing the rotary roller of FIG. 2. Yes, Figure 3 is A of Figure 2.
-A sectional view, and FIG. 8 is a diagram showing an extrusion molding machine for manufacturing the base body of the rotating roller of the present invention.

In the figure, 1 is the connection pipe, 2 is the upper case,
3 is a bumper, 4 is a base of the rotating roller, 4' is a spiral protrusion integrally provided around the bumper, 5 is a brush flocked to the base 4 of the rotating roller, 6 is a lower case, and 10 is a base of the rotating roller. 11 is a shaft support A that is attached after manufacturing the base 4;
8 is an extrusion molding machine, 8 is a rotating shaft A that is engaged and fixed to a shaft support A10, 9 is a rotating shaft B that is engaged and fixed to a shaft support B and a pulley 7, 12 is a medium-sized extrusion molding die, and 13 is a variable A drive motor, 14 is a chain that transmits the rotation of the variable drive motor 13 to the medium extrusion molding die 12, and 15 is an outer extrusion molding die, which is provided with a deformed mold having a plurality of recesses around the periphery. 1
6 is a variable drive motor; 18 is a rotating roller base 4;
17 is a chain that transmits the rotation of the variable drive motor 16 to the outer extrusion molding die 15, and 19 is a chain that transmits the rotation of the variable drive motor 16 to the sizing 18.

As shown in FIG. 3, the rotary roller manufactured according to the present invention has two protrusions 4' formed in a spiral shape in the longitudinal direction, and is provided in a positional relationship that provides rotational balance in the longitudinal direction. The shape with the brush 5 removed from the cross-sectional shape of FIG. 3 is the base 4 of the rotating roller.
This is the shape during extrusion of a deformed mold having a plurality of recesses provided in the outer extrusion molding die 15 of the extrusion molding machine 11 shown in FIG.

Next, a method for manufacturing a rotating roller base according to the present invention will be explained with reference to FIG.

First, plastic or the like, which is the raw material for the base body 4 of the rotating roller, is put into the extrusion molding machine 11 and softened by heating or the like.

The movable drive motor 13 is rotated to rotate the medium extrusion molding die 12, and from here the outer extrusion molding die 1 is rotated.
5, the softened raw material is extruded.

The medium-sized extrusion molding die 12 is provided with a circular or cylindrical mold in the center, and when the softened raw material passes along the mold, it is cooled by contact with the mold and penetrates the center of the base body 4 of the rotating roller. A hole is formed. After molding, the rotating shafts A8 and B9 of the base body 4 of the rotating roller engage with these through holes.

Next, when the raw material with through-holes formed passes through an irregular-shaped mold having a plurality of recesses in the outer mold extrusion molding die 15, a plurality of protrusions are formed on the outer peripheral surface corresponding to the plurality of recesses, and the raw material is cooled by contact with the outside air. The shape of the outer peripheral surface of the base body 4 of the rotating roller is formed by changing the rotational speed of the variable drive motor 16 and the variable drive machine 13, so that the plurality of protrusions on the outer peripheral surface are formed into a spiral shape as shown in FIG. A twist is formed.

The shape when passing through this outer extrusion molding die 15 is the shape of the base body 4 of the rotating roller excluding the brush 5 shown in FIG.

Note that when forming the engagement holes for the rotating shaft A8 and rotating shaft B9 after forming the base 4 of the rotating roller, or when forming the engaging holes for the rotating shaft A8 and the rotating shaft B9,
8. When adhering or welding the rotating shaft B9, the mold provided at the center of the medium-sized extrusion molding die 12 may be removed. The amount of twist of the spiral can be freely changed by changing the rotational speed of the outer extrusion molding die 15 and the extrusion speed of the material.

FIG. 4 is a sectional view of a rotary roller manufactured by increasing the diameter of the external extrusion molding die 15 and having brushes 5 implanted on the base body 4 of the rotary roller. FIG. 5 is a sectional view of the base body 4 of a rotary roller manufactured by increasing the number of protrusions 4' on the external extrusion molding die 15 and giving it a complicated shape. This protrusion 4' also serves as the brush 5 described above. Furthermore, FIG. 6 shows a case in which hairs are implanted on the base body 4 of a rotating roller manufactured by reversing the relative speeds of the outer extrusion molding die 15 and the medium extrusion molding die 12, and the helical protrusion 4' is reversed halfway. It has a twisted shape. The base bodies 4 of these rotating rollers are all manufactured by the profile extrusion molding of the present invention.

The brushes 5 are flocked approximately midway between the two protrusions 4' of the base 4 of the rotating roller formed in the extrusion molding machine 11 in this manner, and in a helical shape substantially the same as the protrusions 4'. Further, a shaft support A10 and a shaft support B/driving pulley 7 are respectively engaged and fixed at both ends of the base body 4 of the rotating roller. Furthermore, the rotating shaft A8 is engaged with the shaft support A10, and the rotating shaft B9 is engaged with the shaft supporting member B/driving pulley 7.

As described above, the rotating roller manufactured by extrusion molding using a modified mold according to the present invention does not use a complicated split mold or separate parts to form the protrusion 4', so there are no lines or grooves. A smooth surface is obtained.

As described above, according to the manufacturing method of the present invention, the following effects can be achieved.

(1) It has become easier to form spiral multi-row protrusions on the outer circumferential surface of the base of a rotating roller, which was difficult in the past.

(2) It is possible to manufacture rotating rollers with a smooth outer surface without burrs from partings caused by molding or streaks or grooves at boundaries caused by locking different parts, and after manufacturing, the rotating rollers are free of lint, dirt, etc. There is less adhesion and an improvement in suction efficiency can be expected.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view of a main part of a floor suction port using a rotating roller manufactured by the manufacturing method of the present invention, FIG. 2 is a diagram showing an example of a rotating roller assembly manufactured by the manufacturing method of the present invention, and FIG. The figure is a sectional view taken along line A-A in Figure 2.
4 and 5 are cross-sectional views of another rotating roller of the present invention, and FIG. 6 is a side view of another rotating roller of the present invention.
FIG. 7 is a side view of a rotary roller formed by conventional injection molding, and FIG. 8 is a processing explanatory diagram of profile extrusion molding used in the method of manufacturing a rotary roller of the present invention. In the figure, 4 is the base of the rotating roller, and 4' is a protrusion.
The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. As an external extrusion molding die, a deformed mold having a plurality of concave portions on the inner periphery is used, and the softened plastic is extruded while rotating the deformed mold to form a multi-striped spiral protrusion on the outer peripheral surface. A method for manufacturing a rotating roller for a floor suction port of a vacuum cleaner, characterized in that the base of the rotating roller is integrally molded, and then brushes are helically flocked between the protrusions to form the rotating roller.