JPH0852411A - Material application method - Google Patents

Abstract

PURPOSE:To efficiently apply a self-locking agent, etc., over the internal threaded region of a nut. CONSTITUTION:Many nuts 20 are placed in a basket, and the basket is dipped in a liq. material. The nut 20 and a cloth 21 are transferred in a tumbler-type rotor 10, and the rotor 10 is rotated. The material deposited on the outer face of the nut 20 is wiped off with the cloth 21 by the rotation, the material is left only on the internal threaded region of the nut 20, and the coating of the material is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material applying method, and more particularly to a material applying method which is preferably used for applying a liquid material such as a self-locking agent to the inner thread region of a nut.

[0002]

2. Description of the Related Art Conventionally, in order to prevent loosening of a screw to be fastened, a method of applying a material such as a liquid self-locking agent to the thread region of a bolt or a nut has been adopted.

An example of a conventional material coating device is shown in FIGS. 3 and 4. In these figures, nut 3
0 is held substantially horizontally at a predetermined application position via a nut holder (not shown). This nut 3
A material applying means 31 is provided in the inner thread region of 0 so as to be able to move forward and backward along the vertical direction. The material application means 31 includes a cylinder 32 that is vertically movable and the cylinder 3
2 and the plunger 33 disposed inside the cylinder 32, when the plunger 33 is in the retracted position in the cylinder 32, the entire material application means 31 descends and is immersed in a material tank (not shown), A certain amount of liquid material can be accommodated in the upper end region of the.

In applying the material to the inner threaded area of the nut 30, as shown in FIG.
Is configured to rise in the cylinder 32, which pushes the material from the upper end of the cylinder 32 so that the material can be applied to the inner thread region of the nut 30. According to this, the material can be reliably applied to the inner thread region of the nut 30, and a certain self-locking effect or the like can be obtained when the bolt or the like is tightened.

[0005]

However, in such a material applying method, the nuts 30 as objects to be applied are held horizontally one by one, and the material applying means 31 arranged at the applying position of the nut 30. Since the above-mentioned coating method is used, it is impossible to coat a large amount of material on the inner surface screw area of the nut 30 by one operation, which is one of the factors that increase the processing cost of the nut 30. Moreover, the equipment for carrying out such a method becomes complicated, but there are various inconveniences such that the material application amount needs to be adjusted by the amount of advance / retreat of the plunger 33 each time the inner diameter of the nut to be applied is different. .

[0006]

SUMMARY OF THE INVENTION The present invention has been devised by paying attention to the inconvenience of such a conventional example, and its object is to enable material application to a large number of nuts in an extremely short time, resulting in a large processing cost. Another object of the present invention is to provide a material coating method capable of reducing the number of times and simplifying the coating apparatus.

[0007]

In order to achieve the above object, the present invention is a method for applying a liquid material to the inner surface of a nut, wherein the nut is immersed in the liquid material and then taken out to remove the nut. A method is adopted in which the wiper is housed in a rotor together with a predetermined wiper, and the wiper wipes the material adhered to the outer surface of the nut by the rotation of the rotor to leave the material only on the inner surface of the nut. At this time, it is preferable that the nut and the wiping means are randomly rotated in the rotating body by providing a plurality of ribs on the inner surface side of the rotating body.

[0008]

[Function] When the nut immersed in the liquid material is taken out,
The liquid material adheres to the entire surface of the nut, and the nut is entirely wet. When this nut is housed in a rotating body together with wiping means such as a piece of cloth and rotated, the wiping means is free to move in the rotating body while being entangled with the nut and wipe off the material adhering to the outer surface of the nut. Becomes As a result, the material existing in the inner thread region of the nut is left as it is without being wiped off, and as a result, the material is applied only to this region.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a rotating body for carrying out the material coating method according to the present invention. In this figure, a rotating body 10 includes a tumbler 12 having an opening 11 on a front side thereof, and a drive device which rotatably supports the tumbler 12 in a direction of an arrow A in the drawing and has a motor (not shown) therein. 13 and a base plate 14 provided on the front side of the drive device 13.

A nut 20 and a piece of cloth 21 as a wiping means are accommodated in the tumbler 12, respectively, and these can be rotated while being entwined with each other in the tumbler 12 by the rotation of the tumbler 12. It is provided. At this time, a plurality of ribs 12A are formed on the inner surface side of the tumbler 12 in order to promote random entanglement between the two.

Next, the material coating method of this embodiment will be described with reference to FIG.
It will be explained with reference to also.

In the step before putting the nut 20 into the tumbler 12, as shown in FIG. 2, first, a large number of nuts 20 are housed in a mesh basket 22. Next, holding the handle 23 of the basket 22, a material tank 25 containing a liquid material such as a self-locking agent.
Put the basket 22 inside, and the basket 2
Each nut 20 in 2 will be immersed in the liquid material.

After that, the basket 22 is pulled up from the material tank 25 and sieved several times to drop the excess liquid material. At this time, the nut 20 is in a wet state with the material all over the surface.

Next, the nut 20 is transferred from the basket 22 into the tumbler 12, and at the same time, the cloth piece 2 is removed.
Put 1 in tumbler 12. At this time, when the liquid material is a solvent type, a solvent corresponding to this is used as the piece of cloth 21.
It is preferable to impregnate the above.

When the tumbler 12 rotates, the nut 20 and the piece of cloth 21 contained in the tumbler 12 are
And the presence of the ribs 12A cause them to rotate for a certain time while being intricately entwined with each other. This allows the nut 20
The liquid material adhering to all the surfaces except the inner surface screw area is wiped off with a piece of cloth 21, and as a result, the nut 20 in which the material is applied only to the inner surface thread area can be obtained.

Therefore, according to such an embodiment, after the many nuts 20 are integrally immersed in the liquid material,
Since the method of putting them in the tumbler 12 and rotating them together with the piece of cloth 21 is adopted, material application can be realized for a considerable amount of nuts in one operation, and compared to the conventional method of applying material one by one. As a result, it is possible to dramatically improve the coating processing efficiency, and with this, it is possible to expect a significant reduction in the nut processing cost.

Moreover, since the existing material tank 25 or the like other than the rotating body 10 may be used as the apparatus for implementing the above-mentioned coating method, not only the equipment can be downsized but also the equipment cost can be reduced. It is possible to reduce costs.

In the above embodiment, the case where the piece of cloth 21 is used as the wiping means is illustrated and described, but the present invention is not limited to this, and a sponge or the like may be substituted. In short, the means used can be variously changed as long as the material attached to the outer surface of the nut 20 can be wiped off by the rotation in the tumbler 12 by suction or the like.

The rotating body 12 may have a different structure. Incidentally, although the motor-driven automatic rotating body 12 is used in the above embodiment, it is of course possible to use a manual type rotating body provided with an appropriate handle.

[0021]

Since the present invention is constructed and operates as described above, according to this, the material application to a large number of nuts can be performed in an extremely short time, and the working cost can be greatly reduced. Thus, it is possible to provide a material coating method which has an excellent effect which has not been obtained in the past, in which the coating apparatus can be simplified.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a rotating body for carrying out a material coating method according to the present invention.

FIG. 2 is an explanatory view showing a work process before inserting a nut into a rotating body.

FIG. 3 is a cross-sectional view showing a state just before material application in a conventional material application method.

FIG. 4 is a cross-sectional view during material application showing the next step of FIG.

[Explanation of symbols]

 10 rotator 12 tumbler constituting the rotator 20 nut 21 wiping means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area B05C 9/12

Claims (2)

[Claims] 1. A method of applying a liquid material to an inner surface of a nut, wherein the nut is immersed in the liquid material and then taken out, and the nut is accommodated in a rotor together with a predetermined wiping means, A method for applying a material, characterized in that the wiping means wipes the material adhered to the outer surface of the nut by rotation to leave the material only on the inner surface of the nut. 2. The material applying method according to claim 1, wherein a plurality of ribs are provided on the inner surface side of the rotating body, and the nut and the wiping means are randomly rotated in the rotating body.