JPH042197Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a concrete block for use as an earth stopper suitable for inserting a drain pipe.

(Disadvantages of Prior Art) Conventional concrete blocks had the following disadvantages. That is, when inserting a drain pipe into a concrete block, it is necessary to cut out a relief part in the block using a drill or the like so that it passes through the block, which has the disadvantage of requiring a lot of effort. It was hot. In addition, the notch edge,
It is difficult to create a smooth shape that follows the outer circumference of the drain pipe, and when viewed from the front, the jagged parts are noticeable, resulting in an unsightly appearance after construction. It was hot.

(Purpose of the invention) This invention was made in order to eliminate the above-mentioned drawbacks, and the purpose is to provide a concrete block that is easy to pass a drain pipe through and has a good appearance after construction. be.

(Examples) This invention will be described below based on two examples shown in the drawings.

Example 1 (Figures 1 to 3) Block 1 has front and rear walls 2 and 3 with a rectangular front shape.
and a plurality of connecting ribs 4 that connect these front and rear walls 2 and 3, and at the lower part of the center of the block 1 in the left and right direction of the part excluding the front wall 2, there is a rib that is open downward and rearward. , a drain pipe relief part 6 that looks approximately like an inverted U-shape when viewed from the back is formed, and this drain pipe relief part 6 has a drain pipe relief notch 5 formed in the rear wall 3, and this notch 5. It has a drain pipe escape space 13 that overlaps with the top when viewed from the back and continues to the front wall 2. In addition, when the connecting rib 4 is located so as to overlap with this drain pipe relief space 13, the connecting rib 4 has a shape in which the portion overlapping with the drain pipe relief space 13 is cut away. A recessed stepped portion 7 is formed in a portion of the rear surface of the front wall 2 that faces the drain pipe relief portion 6. The front wall 2 in this portion is formed into a thin wall portion 14, and a notch in the thin wall portion 14 is formed. A notch groove 8 is formed in a straight portion of the outer edge of the recessed step 7 other than the arcuate periphery, and may also be formed in the arcuate periphery if necessary. At least one longitudinal groove 9 passing through the thin wall portion 14 is formed on the front surface of the front wall 2, and this groove 9 allows the thin wall portion 1 to
4 has an opening 10 formed therein. Also, the front wall 2
A stepped portion 11, which appears as a groove similar to the groove 9 after construction, is formed on the upper edge and left and right edges of the groove.

How to use the concrete block of Example 1 The method of using the concrete block of Example 1 will be explained below.

If the front wall 2 is not cut out, simply insert the drain pipe 12 into the drain pipe relief part 6 from below with the tip of the drain pipe 12 in contact with the recessed step part 7, as shown by the dashed line. , all you have to do is construct an earth stop. In addition, when cutting out the front wall 2, thin section 1
4 along the outer periphery of the recessed stepped portion 7, and then the drain pipe 12 may be fitted from below.

Embodiment 2 (FIG. 4) The same members as in Embodiment 1 are indicated by the same symbols.

Three longitudinal grooves 21 are formed on the front surface of the front wall 2 so as to roughly divide the front surface into four equal parts, and the depth of the grooves 21 is shallower than the thickness of the thin portion 14.

How to use the concrete block of Example 2 The method of using the concrete block of Example 2 will be explained below.

When constructing the earth stop, the thin wall part 14 of the block 1 where the drain pipe is to be attached is cut out along the outer periphery of the recessed step part 7, and then the drain pipe 12 is fitted from below.

(Effects of the invention) As described above, according to this invention, since the drain pipe relief part 6 and the recessed step part 7 are formed in advance in the block 1, when the drain pipe 12 is passed through the block 1, it is possible to It is only necessary to fit the drain pipe 12 into the block, and if necessary, it is sufficient to simply cut out the thin wall part 14 of the front wall 2 before the above operation. It does not take much time and effort, and since only the thin wall part 14 is cut out by the notching process, the shape of the notch on the front wall when viewed from the front can be made smooth so that it just follows the outer periphery of the drain pipe. It can be easily shaped into a shape, resulting in a good appearance after construction. Furthermore, since the drain pipe relief part 6 is formed to open downward and rearward and look approximately like an inverted U shape when viewed from the back, when molding the block of this invention, it will be shaped like an approximately inverted U shape. Since it is only necessary to provide a protruding die for forming the drainage pipe relief part 6 in the block molding die, the conventional molding process can be used as is, and as a result, there is no need to make major changes to the block molding process. Nor.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention,
FIG. 1 is a half-broken front view of Example 1, FIG. 2 is a cross-sectional view taken along the line of FIG. 1, FIG. 3 is a cross-sectional view taken along the line of FIG. 1, and FIG. 4 is a horizontal cross-sectional view of Example 2. . 1... Concrete block, 2, 3... Front and rear walls, 4... Connecting rib, 6... Drain pipe relief part, 7
...Concave stepped portion, 14...Thin wall portion.

Claims (1)

[Claims for Utility Model Registration] 1. A concrete block 1 consisting of front and rear walls 2 and 3 having a rectangular front shape connected by a plurality of connecting ribs 4, except for the front wall 2, is provided with An open drain pipe relief part 6 that looks like an inverted U shape when viewed from the back is formed, and a recessed step part 7 is formed in a portion of the front wall 2 that faces the drain pipe relief part 6. Front wall 2 is thin wall part 1
4 concrete blocks. 2. At least one longitudinal groove 9 passing through the thin wall portion 14 is formed on the front surface of the front wall 2, and this groove 9 forms an opening 10 in the thin wall portion 14. Concrete blocks as described in Scope 1. 3. The concrete according to claim 1, wherein at least one longitudinal groove 21 is formed on the front surface of the front wall 2, and the depth of the groove 21 is shallower than the thickness of the thin wall portion 14. Block.