JP2904001B2 - How to clean the steering wheel core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for degreasing and cleaning a steering wheel core with a petroleum solvent.

[0002]

2. Description of the Related Art Before a steering wheel core (hereinafter referred to as "core") is coated with a urethane resin by reaction injection molding, degreasing is performed from the viewpoint of the adhesiveness between the core metal ring and the urethane resin coating layer. Need to be cleaned. Since the other boss / spoke portions are not coated with urethane resin, degreasing and cleaning are unnecessary.

In this degreasing cleaning, steam cleaning with trichloroethane has been conventionally performed (JP-A-63-5498).
No. 4, etc.) . However, the use of trichloroethane is being abolished due to environmental problems and could not be used in the future.

[0004] For this reason, as an alternative, it is conceivable to perform shower washing with a petroleum solvent such as white kerosene using nozzles having various angles with respect to the cored bar.

[0005]

However, in the case of this cleaning method, strict safety management is required because the petroleum-based solvent is in an atomized state and easily ignited. In addition, since the core metal spokes and bosses that do not require cleaning are also cleaned, the amount of cleaning liquid (petroleum-based solvent) used also increases.

[0006] In view of the above, an object of the present invention is to provide a method of cleaning a core metal which does not require strict safety management and can use a small amount of cleaning liquid.

[0007]

The method for cleaning a metal core according to the present invention solves the above problems by the following constitution.

[0008] The core ring portion of the steering wheel
When degreased and washed with a liquid petroleum solvent, the core metal ring portion is partially immersed in a petroleum solvent stored in a cleaning tank that is opened upward while the ring surface is erected, and rotated and washed. The petroleum-based solvent is injected to the core ring portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. Here, a case where the core metal is continuously cleaned in a set of two pieces will be described as an example, but a single piece or a batch method may be used.

(1) FIG. 1 shows an overall schematic view of an apparatus using the method for cleaning a core metal according to the present invention.

A horizontally erected rectangular circulating conveying path 12 is formed by conventional conveying means.

The work detachment station 14, the first washing station 16, the second washing station 18, the droplet scattering station 20, the first and second stations are arranged in the order of the conveying direction from the right edge of the circulating conveying path 12 in the conveying direction. 2 drying station 22,
24. Specifically, the above-mentioned conveying means is a driven gear 26 capable of holding the core metal W via the boss b.
Are provided on the transport drive member (chain) 29 at six equally spaced intervals.

The first and second cleaning stations 16, 1
As shown in FIGS. 2 and 3, each of the cleaning tanks 8 has a split circular shape, an overflow partition plate 30 is formed in the middle, and a cleaning section 32 is provided on the front side and an overflow section 34 is provided on the rear side. Each washing tank 28 is fixed on a pedestal 37 that moves up and down a cylinder 36. On the front side of the cleaning tank 28, a liquid injection nozzle 38, 3
8 are attached. That is, the nozzle angles are changed so that the cleaning liquid can be jetted onto the front and rear core ring portions r, which are held on the work holding rod 27, and are disposed on both sides. The liquid jet nozzle 38 is connected to the cleaning liquid tank 40 via a pump so as to be able to supply liquid, and the bottom of the overflow portion 34 of the cleaning tank 28 is connected to the tank 40, so that the cleaning liquid can be circulated. (See FIG. 2).

Further, a motor 46 having a drive gear 44 mounted on an output shaft is provided on a base 42 which moves up and down by a cylinder (not shown) behind the washing tank 28.

(2) Next, a method of cleaning a metal core using the above-described cleaning apparatus will be described.

[0016] First of all, the work holding bar 27 in the work desorption station 14, <br/> kicking Mounting the metal core W is a work. At this time, the work holding rod 27 is projected horizontally and the boss
In order to mount the core W through the portion b, the core ring r
Ring surface (that is, the upper surface of the ring portion perpendicular to the ring axis
(A surface in contact with). Naturally, the cleaning tank 28
The cleaning liquid (liquid petroleum-based solvent) is stored.

Then, the transport driving member 29 is driven to transport the metal core W to the first cleaning station 16.

Subsequently, the motor 46 is moved up through the pedestal 42 by operating the cylinder, and the driving gear 44 and the driven gear 26 of the work holding rod 27 are engaged to rotate the core metal. The rotation speed at this time is 10 to 20 rpm.

[0019] At the same simultaneously, the cleaning tank 28 is raised through the pedestal 37 by Rukoto actuating the cylinder 36, after partial immersion of the core metal ring portion r in the cleaning liquid (petroleum solvent) (generally 1/3 1/2), the cleaning liquid is injected from the liquid injection nozzles 38 , 38 toward the metal core ring portion r. At this time, the amount of partial immersion of the core ring portion r is usually 1/3 to 1 /
Let it be 2.

At this time, the cleaning time in the first cleaning station is usually 15 to 25 seconds.

Subsequently, the core drive W is transported to the second cleaning station 18 by driving the transport drive member 29, and the cleaning is performed in the same manner.

After passing through the first cleaning step and the second cleaning step, the droplets adhering to the core metal ring portion r are scattered by the droplet scattering station 20, and then the first and second liquid droplets are sequentially scattered. After being conveyed to the stations 22 and 24 and dried with hot air, the core metal after the completion of the cleaning process in the core metal detachment station 14 is removed, and the unwashed core metal W is attached to the core metal holding rod 27. .

The above steps are sequentially repeated.

[0024]

According to the method for cleaning a metal core of the present invention, the metal core ring is partially immersed in a petroleum-based solvent stored in a cleaning tank that is open upward while the ring surface is erected. co rotation washed, by injecting petroleum solvent to the core ring portion, the amount of the cleaning liquid can at reduced further without safety management strict <br/> price, improvement of working environment I can do it.

The cleaning effect was not inferior to that of the conventional trichloroethane vapor cleaning, as shown in the test examples described later.

Further, when only the rotary cleaning is performed and when the jet cleaning is added to the rotary cleaning as in the present invention, the cleaning effect is significantly different.

[0027]

[Test example] An iron core obtained by welding and integrating a spoke and a boss to a ring portion (outer diameter: 420 mmφ) formed of a pipe (outer diameter: 13.8 mmφ) using the above-mentioned cleaning device, and rotating and cleaning the same. (Rotation speed: 20 rpm) and the case where spray cleaning (injection amount: 50 ml / sec.) Was added thereto, the oil remaining amount in each cored bar after the cleaning treatment was measured and determined. The result was a spin wash: 0.
3 mg, this example: 0.1 mg. In addition, the same core
For gold, trichloroethane steam washing according to the conventional method
Purification was also performed and the result was 0.2 mg. It can be seen that the cleaning method of the present invention has a sufficient cleaning effect.

[Brief description of the drawings]

FIG. 1 is an overall schematic perspective view of an apparatus used for a core metal cleaning method of the present invention (the cleaning liquid spray piping is omitted).

FIG. 2 is a plan view showing an example of a cleaning tank used in the core metal cleaning method of the present invention.

FIG. 3 is a front view of the same.

[Explanation of symbols]

 12 Circulating transport path 16 First cleaning station 18 Second cleaning station 26 Follower gear 27 Work holding rod 28 Cleaning tank 38 Liquid ejection nozzle 44 Drive gear W Steering wheel core r Core ring

Continuation of the front page (56) References JP-A-63-54984 (JP, A) JP-A-50-75528 (JP, A) JP-A-63-60735 (JP, A) JP-A-4-108562 (JP) , A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B62D 1/04-1/28 B08B 3/08

Claims (1)

(57) [Claims] 1. A core ring portion of a steering wheel
When degreased and washed with a liquid petroleum solvent, the core metal ring portion is partially immersed in the petroleum solvent stored in the upper open cleaning tank while the ring surface is erected and rotated and washed. A method for cleaning a steering wheel core, comprising injecting the petroleum solvent into the core ring.