JPH0113102Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention relates to a metal unit plate for tank assembly.
In particular, the present invention relates to a metal unit plate for assembly, which prevents water from accumulating in the bolt portions for fastening the unit plates, prevents rust from forming in the bolt portions, and allows a tank with good durability to be assembled.

(Prior art and its problems) Conventionally, it has been known to assemble a tank by joining together with bolts and nuts a number of metal unit plates made by bending the periphery of a rectangular board to the same side and providing a joining edge. However, when joining these unit plates, a gasket is sandwiched between the joining edges of the unit plates, and the bolts are inserted into bolt insertion holes previously drilled in the joining edges and the nuts are tightened. be. In this case, when the bolts and nuts are strongly tightened to make the bolts watertight, the area around the bolt insertion hole becomes depressed, and rainwater and condensation water accumulate in the area, making the bolt part susceptible to rust.

Therefore, as disclosed in Japanese Utility Model Application No. 58-119589, a protrusion is provided near the periphery of the bolt insertion hole of the joint edge toward the inside of the joint edge, and a notch is formed in the protrusion. The protrusion reinforces the vicinity of the periphery of the bolt insertion hole, and the notch formed in the protrusion prevents rainwater and dew water from accumulating in the recess inside the protrusion.

However, in the above-mentioned conventional configuration, because the bolt partially abuts and is fixed to the protrusion due to the presence of the notch, when the unit plates are fastened together with the bolt, the fastening force is applied to the protrusion. It was concentrated only in one part of the house and was not completely watertight.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional points. a first groove is formed by recessing the groove in a direction opposite to the part; a second groove is formed to communicate between the first groove and the edge of the joining edge; The depth of
This is a metal unit plate that has the same or deeper depth as the groove of the bolt, which prevents rust at the bolt part and improves watertightness.

(Example) Hereinafter, a specific configuration of the present invention will be described based on an example shown in FIGS. 1 and 2.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the metal unit plate for tank assembly of the present invention, and FIG. 2 is a longitudinal cross-sectional view showing a state in which the unit plates of FIG. 1 are joined.

In FIG. 1, reference numeral 1 denotes a unit plate for tank assembly of the present invention, which is made of metal such as steel plate or stainless steel, and has a joining edge 3 formed by bending the periphery of a right-angled rectangular substrate 2 to the same side. . A large number of bolt insertion holes 4 are bored in the joint edge 3, and the vicinity of the periphery of the bolt insertion hole 4 is made to protrude toward the inside of the joint edge 3 of the unit plate 1, and the boundary periphery of the protruding portion 5 is recessed in a direction opposite to the protrusion 5 to form a first groove 6. A second groove 7 is formed from the first groove 6 and communicates between the edges of the joining edge 3, and the depth of the second groove 7 is equal to the depth of the first groove 6. It is more preferable to make the first groove deeper than 6.0 because the water accumulated in the first groove 6 can be better discharged.

In this way, the bolt insertion hole 4 is positioned higher than the surface of the joining edge 3. Further, the vicinity of the periphery of the bolt insertion hole 4 is reinforced by bending the protrusion 5 and the groove 6, and the first groove 6 is reinforced by the second groove 6.
The concave groove 7 is formed so as to communicate with the edge of the joining edge 3.

In FIG. 1, reference numeral 6a denotes a recess extending in three directions from the first groove, and forming the recess 6a is more preferable because the periphery of the groove 6 is further reinforced.

To illustrate the method of joining the unit plates 1 of the present invention, as shown in FIG. 9 and fasten with a nut 10. At this time, in order to make it watertight, even if the bolts and nuts 9 and 10 are strongly fastened, the vicinity of the periphery of the bolt insertion hole 4 will be at a higher position than the surface of the joint edge 3, and the protrusion 5 and groove 6 should be bent. Since it is reinforced by the bolt, there is no possibility that a depression will be formed at the periphery of the bolt insertion hole 4 when the bolt is fastened, and water will not accumulate in the depression, as in the conventional case. Therefore, the bolt portion can be prevented from rusting.

Also, the first groove 6 is connected to the joining edge 3 by the second groove 7.
Since the depth of the second groove 7 is made equal to or deeper than the depth of the first groove 6, there is no possibility that water will accumulate in the groove 6. Furthermore, by forming the groove 6, when the two unit plates 1 are fastened together, the entire circumference of the lower surface of the groove 6 is press-fitted into the packing 8, thereby preventing water leakage from the bolt insertion hole 4. be able to.

(Effect of the invention) Since the present invention has the above structure, the vicinity of the periphery of the bolt insertion hole is located at a higher position than the joint edge, and is reinforced by bending the protrusion and the first groove. When the bolt is fastened, a depression is formed at the periphery of the bolt insertion hole, and water does not accumulate in the depression, thereby preventing rust from forming on the bolt portion. Also, the first concave groove is the second concave groove.
Since the second groove is connected to the edge of the joint edge by the groove, and the depth of the second groove is the same as or deeper than the first groove, there is a risk that water may accumulate in the first groove. Furthermore, since the entire circumference of the lower surface of the first groove is press-fitted into the packing, there are advantages such as being able to reliably prevent water leakage from the bolt insertion hole.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the metal unit plate for tank assembly of the present invention, and FIG. 2 is a longitudinal cross-sectional view showing a state in which the unit plates of FIG. 1 are joined. In the figure, 1 is a unit plate, 2 is a substrate, 3 is a joining edge, 4
is a bolt insertion hole, 5 is a protrusion, 6 is a first groove,
7 is a second groove.

Claims (1)

[Scope of utility model registration request] In a unit board formed by bending the periphery of a right-angled rectangular board to the same side and providing a joining edge, a bolt insertion hole is bored in the joining edge, and the vicinity of the periphery of the bolt insertion hole is directed toward the inside of the joining edge. A first concave groove is formed by protruding the protrusion and recessing the boundary edge of the protrusion in a direction opposite to the protrusion, and a second concave groove that communicates between the first concave groove and the edge of the joining edge. A metal unit plate for tank assembly, characterized in that a groove is formed, and the depth of the second groove is the same as or deeper than the depth of the first groove.