JPH03213180A - Sealing of steel plate joint - Google Patents

Abstract

PURPOSE:To permit a sealing to be effected between flat steel plates and make this sealing applicable to the joints of such steel plates in many types of automobil by a method wherein, by using an auxiliary member having a vertical wall part higher than the end face of a steel plate, a sufficient stepped part is formed for sealing between the end face and the vertical wall part. CONSTITUTION:An auxiliary member 26 is mounted on the flat surface part 41 of one steel plate 22 in a position located at a predetermined distance from the end face 25 of the other steel plate 21 so as to define a groove part 31 between the end face 25 and a vertical wall part 28 of the auxiliary member 26 opposite to and higher than the end face 25. A sealing agent 32 is then applied into the groove part to form its build-up. A spatula 34 is thereafter moved with its straight lower edge 33 in contact with the upper edge of the vertical wall part 28 and the surface part 36 of the steel plate 21 near its end face 25, whereby the build-up part of the sealing agent 32 is removed to seal the joint parts of the steel plates.

Description

[Detailed Description of the Invention] (Industrial Application Field) The second invention is a method for sealing joints of steel plates, for example, by applying a sealant to the joints of car body panels to prevent water from entering the joints and to prevent rust. It is related to.

(Prior art) As an example of the conventional sealing method for steel plate joints, there is a method as shown in Fig. 2 (Automotive Engineering Complete Book 13).
Volume: Passenger car bodies; see Table 3.18, page 96, published by Sankaido on April 20, 1980).

Reference numerals 1 and 2 in the figure are steel plates used for vehicle body panels, and the end edges 3 and 4 of the steel plates 1 and 2 are overlapped and joined. In order to prevent water from entering the joint 5 between the end edges 3 and 4 and to prevent rust on the end face 6, the joint 5 including the end face 6 is sealed.

The method for sealing this steel plate joint is first shown in Figure 2 (
As shown in A), a stepped portion 7 that substantially matches the height of the end surface 6 of the steel plate 1 is formed on the lower steel plate 2, and a groove portion 8 between the stepped portion 7 and the end surface 6 is filled with vinyl chloride sol (PVC). ) etc. is applied in a raised state.In order to maintain the appearance of the area where the sealant 9 is applied, (B
), the lower edge 10 of the rubber spatula 13 is brought into contact with the flat parts 11 and 12 of the steel plates 1 and 2, and the groove part 8
, so that the raised portion of the sealant 9 is scraped off.

However, in such a method of sealing a joint between steel plates, the bottom edge 10 of the rubber spatula 13 bites into the groove 8 and the sealant 9 sticks, causing the surface of the sealant 9 to become concave, and There is a risk that rust may occur from the exposed portion of the edge 14.

Therefore, in order to prevent such rusting, a method of sealing the joints of steel plates as shown in FIG. 3 has been adopted.

In this method of sealing a joint between steel plates, as shown in FIG.
The sealant 9 is applied to the groove 1 so that it swells beyond the groove 1.
6. Then, similar to the method for sealing the steel plate joint shown in FIG. 2, the raised portion of the sealant 9 is scraped off using a rubber spatula 13. At this time, as shown in FIG. 3(B), the lower edge l of the spatula 13 is
O is the upper edge of the step part 15 of the steel plate 2 and the flat part 11 of the steel plate 1
Since the upper end 14 is abutted diagonally upward, the upper end 14 of the end face 6 is sealed by the sealant 9, and rusting from the upper end 14 portion is prevented.

(Problem to be Solved by the Invention) However, in the conventional method of sealing a joint of steel plates shown in FIG. Due to constraints in the press forming process and requests for the steel plate 1.2 to be used in multiple car models, etc., it may not be possible to form such a high stepped portion 15, and in such cases, a flat steel plate must be used. , similar to FIG. 2, there is a problem in that it occurs from the end surface 6 of the steel plate 1.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned conventional problems, in which the edge portions of a plurality of steel plates are joined in an overlapping state, and the end surfaces of the edge portions are bonded together. In the method for sealing a joint of steel plates in which sealing is performed by applying a sealant to the joint including the other steel plate, an auxiliary member is attached at a position spaced a predetermined distance from the end face of one steel plate on the flat surface of the other steel plate. A groove is formed between the end face and a vertical wall surface of the auxiliary member that is opposite to the end face and is formed higher than the end face, and a sealant is applied to the groove to swell it up, and then the linear lower end of the spatula is The method for sealing a joint between steel plates involves scraping off the raised portion of the sealant by moving the edge into contact with the upper edge of the vertical wall surface portion and the flat surface near the end face of the one steel plate. It is characterized by

(Function) According to this method, since the spatula is brought into contact with the vertical wall of the auxiliary member so as to be inclined toward the flat surface of the other steel plate, the sealant is pushed into the groove by the lower edge of the spatula. At the same time, the sealant interposed between the flat part and the lower edge of the other steel plate is pressed onto the flat part and smoothed. Further, the raised portion of the sealant that is not pushed into the groove and is not pressed onto the flat surface and protrudes in front of the spatula is scraped off by the front surface of the spatula.

As a result, rusting from the upper edge of the end face of one of the steel plates and water from entering the joint are prevented. Furthermore, since the groove is formed using the auxiliary member, it is possible to completely seal the joint between flat steel plates or the joint between steel plates with insufficient steps.

(Example) Hereinafter, the present invention will be explained based on examples.

FIG. 1 is a diagram showing an embodiment of the present invention.

In the figure, numerals 21 and 22 are flat steel plates, and the edge portions 23 and 24 of these steel plates 21 and 22 are overlapped with each other, and the portion facing the end surface 25 of the steel plate 21 is made of vinyl chloride or the like. The auxiliary member 26 is then bonded.

The auxiliary member 26 has a triangular cross section, and as shown in FIG. 1A, the bottom surface portion 27 is bonded onto the flat surface portion 41 of the steel plate 22 with an adhesive (not shown).

The auxiliary member 26 also has a vertical wall section 28 that is perpendicular to the bottom section 27 and has a height of about 0.8 to 2.0 m higher than the end surface 25, and an upper edge 29 of the vertical wall section 28 that is inclined. A slope portion 30 is formed. And this auxiliary member 2
No. 6 vertical wall surface portions 28 are arranged facing each other at a predetermined distance from the end surface 25, and a groove portion 31 is formed between the end surface 25 and the vertical wall surface portion 28.
is formed.

After applying the sealant 32 to the groove 31 in a heaping manner, as shown in FIG.
Press 4.

When the spatula 34 is pressed, the center edge 3 of the lower edge 33
5, the sealant 32 in the groove 31 is tightly pressed into the groove 31. Therefore, when the spatula 34 is moved forward in the figure along the groove 31, the sealant 32
is tightly pushed into the groove 31 and smoothed out,
The raised portion that is not pushed into the groove 31 and protrudes in front of the spatula 34 is scraped off by the front surface of the spatula 34.

Further, the lower edge 33 of this spatula 34 is inclined from the upper edge 29 of the vertical wall surface of the auxiliary member 26 and abuts on the flat part 36 near the end face 25 of the steel plate 21, so that there is a gap between the lower edge 33 and the flat part 36. The sealant 32 is interposed in the gap, and as the spatula 34 moves forward, the sealant 32 in the gap is pressed along the flat part 36 and smoothed out.
In addition, the raised portion protruding forward is scraped off by the front surface of the spatula 34.

As a result, as shown in FIG. 1B, the groove 31 and the upper edge 38 of the end face 25 are completely sealed by the sealant 32, which prevents rust from forming on the upper edge 38 and the joint 39. Intrusion of water etc. is prevented.

In this embodiment, the explanation has been made regarding the joining of the flat steel plates 21 and 22, but the invention is not limited to this, and for example, the joining of the steel plates 1 and 2 with insufficient stepped portions as shown in FIG. Of course, it is also possible to sufficiently seal the joint.

(Effects of the Invention) As explained above, according to the present invention, a sufficient level difference can be formed between the end face and the vertical wall surface by using the auxiliary member having the vertical wall surface that is taller than the end face of the steel plate. Since the sealing is performed by using the sealing method, it is possible to seal flat steel plates with each other, and it can be applied to the joints of steel plates of many car models, which is a useful effect in practice.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a method of sealing a steel plate joint according to an embodiment of the present invention, Figs. A perspective view showing a method of sealing a steel plate joint using a step part,
FIG. 3 is a perspective view showing a method of sealing a joint of steel plates using a stepped portion that is taller than the end face of the steel plates. 21, 22... Steel plate 23. 24... Edge portion 25... End surface 26... Auxiliary member 28...
・Vertical wall surface part 29...Top edge 31...Groove part
32...Sealing agent 33...Lower edge
34... Spatula 36... Flat part 39...
Joint part 41...Plane part Fig. 2 (A') (B) /,? 21, 22...Steel plate 25...End surface 28...Vertical wall surface portion 31...Groove portion 33...Lower edge 36...Plane portion 41...Plane portion 23, 24...Edge Part 26... Auxiliary member 29... Upper edge 32... Sealing agent 34... Spatula 39... Joint part Fig. 1 (B) 3 4 I V

Claims (1)

[Claims] In a method for sealing a joint of steel plates, in which the edges of a plurality of steel plates are joined in an overlapping state, and a sealant is applied to the joint including the end faces of the edges to seal the joint. , by attaching an auxiliary member at a position spaced a predetermined distance from the end face of one steel plate on the flat part of the other steel plate,
A groove is formed between the end face and a vertical wall surface of the auxiliary member that is opposite to the end face and is formed higher than the end face, and a sealant is applied to the groove to raise it up. A steel plate joining part characterized in that the raised portion of the sealant is scraped off by moving the lower edge into contact with the upper edge of the vertical wall surface portion and the flat surface near the end surface of the one steel plate. Sealing method.