JPH0796958B2 - Manufacturing method of air conditioning louver knob - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing an air conditioning louver knob.

(Prior Art and Problems Thereof) Generally, an air conditioning louver is formed by arranging a plurality of vertical fins and a plurality of horizontal fins in an intersecting manner to form a blower port of a car air conditioner, and a knob that is normally inserted into the horizontal fins. By operation, the vertical fins are interlocked to the left and right, and the horizontal fins are interlocked vertically to adjust the wind direction. Therefore, there is a functional gap between the horizontal fins and the knobs inserted through the horizontal fins, and there is a drawback that vibration causes rattling. Therefore, the actual public Sho 62-37071
In Japanese Patent No. 2, the knob and the horizontal fin are inserted through the elastic member to eliminate the chattering phenomenon between them.

However, it is difficult to assemble a separate elastic member into the knob and insert the elastic member into the horizontal fin in terms of assembly work.

(Problems to be Solved by the Invention) Therefore, the present invention provides a method for manufacturing an air conditioning louver knob having a lip portion capable of preventing rattling between the knob and the horizontal fin by integrally molding the knob without using a separate member. The task is to do.

(Means for Solving the Problem) The present invention relates to a method for manufacturing an air conditioning louver knob having a through hole through which a wind direction adjusting fin member is inserted, and in the method, a straight through hole for inserting a horizontal fin using a core and the through hole. For integrally injection-molding a knob having a lip portion that extends outward along the inner diameter of the hole at the end of the
Process and the lip portion integrally formed at the end of the through hole,
And a second step of projecting inwardly of the through hole so as to apply a pressing force to the lateral fin inserted into the through hole.

The thermoplastic resin used in the present invention must be selected so that the lip portion projecting inward of the hole can impart elasticity that can prevent rattling between the knob and the horizontal fin. Polypropylene resin and polyethylene resin are preferably used.

Further, the shape of the lip portion projecting inward of the through hole may be any shape that can apply a pressing force to the wind direction adjusting fin through which the knob is inserted, usually a lateral fin.

(Operation) According to the present invention, the step of forming the through hole through which the fin member requiring the core is inserted, and the step of forming the lip portion projecting inward of the through hole that interferes with the core. Since they are divided into separate steps, the lip portion can be integrally formed without hindering the formation of the through hole using the core.

In the first step, the through hole may be formed so as to extend outward along the inner diameter of the through hole so that the use of the core is not hindered.

Hereinafter, the present invention will be described in detail based on specific examples shown in the accompanying drawings.

(Embodiment) FIG. 1 is a partial front view of an air-conditioning louver, in which a plurality of vertical fins 2 are rotatably arranged in a row at right and left at regular intervals with respect to a frame 1 in a blower port of a car air conditioner , A plurality of horizontal fins 3 which are vertically arranged at regular intervals so as to be vertically rotatable, and which are inserted through the horizontal fins 3 in the central portion.
When you slide left and right, all the vertical fins rotate left and right, as shown in the II-II line cross section in Figure 2.
When the horizontal fins 3 are rotated up and down by the knob 4, all the horizontal fins 3 are configured to be interlocked with each other vertically, and the wind direction is adjusted.

In the present invention, the knob 4 inserted into the horizontal fin 3 is manufactured as follows.

The first example is as shown in FIGS. 3 (a) and 3 (b).
(A) First, in the first step, the entire knob is injection-molded with a thermoplastic resin by using the core 6, and the knob portion 41 that is inserted into the horizontal fin 3 and the engagement portion 42 that is engaged with the vertical fin 2 are formed. At the same time as being integrally molded, the knob 41 has a groove in the center of the outer circumference.
While forming 41a, a straight through hole 43 is formed in the inside by the core 6. Further, a protrusion 43a projecting toward the engaging portion 42 and a flange portion 44 extending in the penetrating direction along the inner diameter of the penetrating hole 42 are formed at the central portion of the penetrating hole 42 and at both ends of the penetrating hole 42.

After molding, the core 6 is removed by sliding in the longitudinal direction of the through hole.

(B) Next, the flange portion 44 is cut inwardly in a wedge shape of 3 to 5 mm in the thickness range of 0.5 to 1 mm, and the lip portion 5 is formed so that the tip projects inward of the through hole by 1 to 2 mm. .

In the second example, as shown in FIGS. 4 (a) and 4 (b),
(A) In the first step, it is connected to the tip of the flange portion 44 by the notch groove 44a within the remaining thickness of 0.5 to 1 mm,
A lip portion 5 is formed which extends in the penetrating direction along the inner diameter of the through hole 42 and which protrudes in a wedge shape of 3 to 5 mm. Other than that, 1st
Mold as in the example. (B) Then, in the second step, 1-2 mm toward the inside of the through hole through the cut groove 44a.
The tip end is bent by hand or machined so as to project to form the lip portion 5.

In this way, the formed lip portion 5 presses the lateral fin 3 inserted into the through hole 43 against the inner wall of the through hole 43 on the other side by its elasticity, as shown in FIG.

In the first and second examples, in the first step, as long as the use of the core does not hinder,
Since the projections 43a are formed at appropriate positions of the through holes, preferably in the direction opposite to the protruding direction of the lip portion, while reducing sliding resistance by supporting the three points with the lip portions at both ends of the through hole, It is possible to prevent looseness between the knob and the sliding fin.

(Effects of the Invention) As is clear from the above description, according to the present invention, in the method for manufacturing an air conditioning louver knob having the through hole through which the wind direction adjusting fin member is inserted, the through hole through which the fin member requiring the core is inserted. The hole formation and the protrusion formation of the lip portion toward the inside of the through hole that interferes with the core are divided into separate steps, and in the first step, the knob with the straight through hole is made of thermoplastic resin. Injection molding is performed to integrally form a lip portion extending outward along the through hole at the end of the through hole, and in the second step, a lip portion extending to the end of the through hole is formed.
Since the protrusion is formed inward of the hole, the formation of the through hole using the core is not hindered, the lip portion can be integrally formed, and the mold structure can be simplified.

[Brief description of drawings]

FIG. 1 is a partial front view of an air conditioning louver, and FIG. 2 is a view of FIG.
II-II sectional view, FIGS. 3 (a) and 3 (b) are explanatory views showing the steps of the first example of the manufacturing method according to the present invention, and FIGS. 4 (a) and 4 (b) relate to the present invention. FIG. 5 is an explanatory view showing the steps of the second example, and FIG. 5 is a sectional view for explaining the function of the air conditioning louver knob manufactured by the method of the present invention. 2 ... Vertical fins, 3 ... Horizontal fins, 4 ... Knobs, 5 ...
Lip part, 43 …… through hole, 44 …… flange part

Claims (1)

[Claims] 1. A method of manufacturing an air conditioning louver knob having a through hole through which a wind direction adjusting fin member is inserted, wherein a straight through hole for inserting a horizontal fin using a core and an inner diameter of the hole at the end of the through hole. A first step of integrally injection-molding a knob having a lip portion extending outward along a thermoplastic resin, and a lip portion integrally formed at the end of the through hole,
A second step of projecting inwardly of the through hole so as to apply a pressing force to the lateral fin inserted through the through hole.