JPH1019762A - Inspection method of painted film and hammer for inspection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily implement inspection of an adhesion strength and elasticity at a factory and on a job site even for painted finished parts. SOLUTION: A hammer 1 for inspection is used having an adhesive tape 4 stuck on a striking surface 3a of a hammer head 3 with the adhesive surface thereof turned upward. The surface of a painted film 6 of an object 5 to be painted is hit with the striking surface 3a of the hammer 1 for inspection through the adhesive tape 4. An inspection of elasticity is performed to discover the peeling of the painted film 6 depending on an impact. At the same time, an inspection of adhesion strength is performed to check the adhesion of the painted film 6 depending on adhering force of the adhesive tape 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection method and an inspection hammer for a coating film formed by applying a paint to an object to be coated.

[0002]

2. Description of the Related Art In general, a coating film is inspected by a destructive inspection such as an adhesive force inspection for detecting poor adhesion of the coating film, an elasticity inspection for detecting a fragile portion of the coating film, a coating film appearance inspection, and a film thickness inspection. There is non-destructive inspection such as inspection.

[0003] Conventionally, the above-mentioned adhesion test is a method of examining the degree of peeling of a coating film by cutting the surface from the coating film surface to the substrate with a cutter, pasting an adhesive tape thereon, and peeling off the adhesive tape. For the elasticity test, a method of applying an impact to a coating film using an impact tester in a test room is employed.

[0004]

However, the above conventional method for inspecting the adhesive force is a destructive inspection in which the degree of peeling of the coating film surface is checked, and therefore cannot be applied to a finished painted product. However, there is a problem that the elasticity inspection method is performed in a test room and cannot be performed at a factory or a site.

Accordingly, the present invention is to make it possible to easily perform an adhesion test and an elasticity test on a painted product at a factory or on site.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an inspection hammer in which an adhesive tape is attached to a hitting surface of a hammer head such that the adhesive surface faces up. A method of inspecting a coating film in which the surface of the formed coating film is hit and an elasticity test and an adhesion test are performed simultaneously.

[0007] By hitting the painted surface with the hitting surface of the inspection hammer, it is possible to give an impact to the coating film, so that a fragile portion can be found, and the adhesion of the coating film can be confirmed by the adhesive strength of the adhesive tape. In addition, poor adhesion of the coating film can be found.

Further, the hammer for inspecting a coating film of the present invention has a configuration in which an adhesive tape is attached to a hitting surface of a wooden hammer head so that the adhesive surface faces up.
The elasticity test and the adhesion test can be performed without damaging the coating film surface.

On the other hand, as a hammer for inspecting a coating film, a hammer head is formed in a hollow shape, and a striking block having a tip surface as a striking surface is slidable in the longitudinal direction at one end of the hollow hammer head. And a spring for biasing the hitting block in a pushing direction is incorporated in the hollow hammer head, and an adjusting screw for adjusting the strength of the spring is provided in the hollow hammer head. The strength of the striking force is adjusted by adopting a configuration in which an adhesive tape is attached to the inside of the other end of the hammer head and an adhesive tape is stuck on the striking surface of the striking block so that the adhesive surface faces up. It can be set arbitrarily by the pressure of the spring by adjusting the screw.

[0010] Further, the adhesive tape to be attached to the hitting surface is
When a plurality of layers are superposed, the used surface-side pressure-sensitive adhesive tape is sequentially peeled off, so that the inspection can be performed efficiently.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 (a) and 1 (b) show an embodiment of a hammer 1 for inspecting a coating film according to the present invention. The hammer 1 is provided with a wooden hammer head 3 at the tip of a handle 2. A plurality of pressure-sensitive adhesive tapes 4 made of a double-sided pressure-sensitive adhesive tape are layered on a striking surface 3a before and after the head 3 and attached to each other.

When the coating film is inspected by using the inspection hammer 1 having the above-described structure, as shown in FIG. One part of the surface is lightly hit with the adhesive tape 4 at the hitting surface 3 a of the hammer head 3.

In this case, since the impact can be given to the coating film 6 by hitting with the hammer head 3, if the hitting portion is a fragile portion, the portion is peeled off and the adhesive tape 4 is removed.
So you can discover it. Further, since the adhesive surface of the adhesive tape 4 is in direct contact with the surface of the coating film 6, a portion of the coating film 6 where the adhesive force is weak due to the adhesive force of the adhesive surface adheres to the adhesive tape 4. Sex can be checked. That is, the elasticity test and the adhesion test can be performed simultaneously with one impact.

The inspection by the above-mentioned impact is carried out while sequentially moving the place. If the adhesive surface of the adhesive tape 4 becomes dirty, the adhesive tape 4 on the surface layer is peeled off and the new adhesive on the next layer is removed. The tape 4 is used, and when all the adhesive tapes 4 on one hitting surface 3a are used, the adhesive tape 4 on the other hitting surface 3a is used. As a result, inspections at many locations can be performed efficiently.

In the above description, the hammer head 3 of the inspection hammer 1 is made of wood, and the adhesive tape 4 is interposed between the hammer head 3 and the coating film 6 when the coating hammer 6 is hit. If it has been done, there is almost no fear of damaging the coating film 6 by tapping the coating film 6 lightly. Therefore, not only prototypes but also painted products can be applied, and since the inspection hammer 1 is small, lightweight and portable, inspection can be performed easily and efficiently at factories and sites. it can.

In the above embodiment, the case where the adhesive tape 4 is applied to both the front and rear striking surfaces 3a of the hammer head 3 has been described. However, only one striking surface 3a may be used.

FIG. 2 shows another embodiment of the inspection hammer, in which a hammer head to be attached to the tip of the handle 14 is formed in a hollow shape, and the hollow hammer head 13 is formed.
A striking block 8 having a striking surface 8a at its tip is housed at one end of the hollow portion 7 so as to be free to make an impact in the longitudinal direction, and the striking block 8 is pushed forward in contact with the rear end of the striking block 8. A spring 9 for biasing the spring 9 is housed in the hollow portion 7, and an adjusting screw 10 for adjusting the strength of the spring 9 is inserted into the other end of the hollow portion 7. A long hole 11 extending in the longitudinal direction is provided on a side wall portion on one end side of the hollow hammer head 13, and a stopper pin 12 fixed to the outer peripheral portion of the hitting block 8 through the long hole 11 is provided in the long hole. 11 on the striking surface 8a of the striking block 8 as shown in FIG.
In the same manner as shown in FIG. 7, an adhesive tape 4 is attached to form an inspection hammer 1A. In addition, inspection hammer 1A
Is made of wood or resin.

In the case of the inspection hammer 1A shown in FIG. 2, the striking block 8 projects from the hollow portion 7 by the force of the spring 9, and when the coating film 6 is struck in the same manner as shown in FIG. Since the striking block 8 is pushed into the hollow portion 7 against the pressure, the strength of the spring 9 is selected by adjusting the screwing position of the adjusting screw 10 so that the striking force can be adjusted arbitrarily. Therefore, the inspection can be performed with a constant impact force even if the operator changes.

In each of the above-described embodiments, a case has been described in which a double-sided adhesive tape is used as the adhesive tape 4. For example, the double-sided adhesive tape is attached to the hitting surface of the hammer head in advance. A single-sided adhesive tape may be sequentially laminated on the surface of the double-sided adhesive tape so that the adhesive surface is facing up, and the number of laminated adhesive tapes 4 may be arbitrarily selected. It goes without saying that various changes can be made without departing from the spirit of the present invention.

[0021]

As described above, the coating film inspection method and inspection hammer of the present invention exhibit the following excellent effects. (1) Hit the surface of the coating film formed on the workpiece with the hammer head with the adhesive tape attached to the hammer head so that the adhesive surface is facing up. Since the inspection and the inspection are performed at the same time, the method can be applied even to a painted product, and can be easily and efficiently performed at a factory or a site. (2) Adhesive tape is attached to the hitting surface of the wooden hammer head so that the adhesive surface is facing up, so that the coating film surface can be made hard to scratch and is lightweight and easy to handle. Therefore, the inspection can be performed efficiently without skill. (3) A hammer head is formed in a hollow shape, and a striking block having a tip surface as a striking surface is slidably inserted in the longitudinal direction at one end of the hollow hammer head and assembled, and the hollow hammer head is assembled. A spring for biasing the hitting block in the pushing direction is incorporated in the hammer head, and an adjusting screw for adjusting the strength of the spring is screwed inside the other end of the hollow hammer head. Wear
Further, by adopting a configuration in which an adhesive tape is stuck on the hitting surface of the hitting block so that the adhesive surface faces up, the strength of the hitting force can be set arbitrarily, and variations due to workers can be reduced. It can be eliminated, and the inspection accuracy can be further improved. (4) By stacking multiple layers of adhesive tape to be applied to the impact surface, the new adhesive surface can be easily exposed by peeling the used adhesive tape. Can be further improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a coating film inspection hammer according to the present invention, in which (a) is a side view and (b) is a schematic view showing the inspection procedure of the coating film.

FIG. 2 is a partially cutaway side view showing another embodiment of the present invention.

[Description of Signs] 1,1A Inspection hammer 3 Hammer head 3a Hitting surface 4 Adhesive tape 5 Workpiece 6 Coating film 7 Hollow portion 8 Hitting block 8a Hitting surface 9 Spring 10 Adjusting screw 13 Hollow hammer head

Claims (4)

[Claims] 1. An inspection hammer in which an adhesive tape is stuck on a hitting surface of a hammer head so that an adhesive surface is facing up, the surface of a coating film formed on an object to be coated is beaten, and an elasticity inspection and an adhesion inspection are performed. And a method for inspecting a coating film. 2. A hammer for inspecting a coating film, wherein an adhesive tape is attached to a hitting surface of a wooden hammer head so that the adhesive surface faces up. 3. A hammer head is formed in a hollow shape, and a striking block having a tip surface as a striking surface is slidably inserted in a longitudinal direction into one end of the hollow hammer head and assembled. In the hollow hammer head, a spring for biasing the hitting block in the pushing direction is incorporated, and an adjusting screw for adjusting the strength of the spring is provided inside the other end of the hollow hammer head. A hammer for inspecting a coating film, wherein an adhesive tape is attached to a hitting surface of the hitting block such that the adhesive surface faces up. 4. The coating film inspection hammer according to claim 2, wherein a plurality of pressure-sensitive adhesive tapes to be attached to the hitting surface are superposed in layers.