JP3011839B2 - Checker brick and its construction method - Google Patents

Abstract

PURPOSE:To ensure stability after brick establishment and hereby improve a heat transfer efficiency by forming a gap between opposite fifth side walls of first and second checker bricks. CONSTITUTION:A checker brick 1 provides an octagonal cross section cylinder which is opened at vertical opposite ends and is constructed by connecting eight rectangular plate shaped side walls 11-18. Four such checker bricks 1 are prepared and are arranged into an annular shape such that the side walls 11 are parallel to each other on the same flat plane. Checker bricks 2 of the same structure are placed on the center of the bricks 1. Accordingly, a cylindrical space 30 in the second stage bricks 2 is located just above a substantially rectangular space surrounded by the first stage four bricks 1, and a gap between opposite side surfaces of third stage two adjacent bricks 1 is located just above the cylindrical space 30. Hereby, the side walls of the adjacent check bricks 1, 2 are prevented from being brought into contact with each other, so that associated gas can flow the spaces and the gaps for ensurance of effectual heat transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a checker brick used in a heat storage chamber for an industrial furnace and a method for constructing the same.

[0002]

2. Description of the Related Art Conventionally, various shapes and construction methods of checker bricks of this type have been devised . Initially,
Mainly used rectangular checker bricks have concerns about their stability after construction. Therefore, in recent years, for the sake of stability after construction and reduction of man-hours during construction, for example,
And large molded brick in the shape of a cross that issue has been disclosed in 5835, such as a box-shaped large molded brick of which are disclosed in Japanese Open Sho 57-161487 JP has come been proposed and used.

The checker brick described in Japanese Patent Publication No. 55-45835 has a central hub portion and four arms extending radially therefrom. In this brick, a cylindrical space having a rectangular cross section is formed between the adjacently disposed bricks, and these spaces serve as gas passages. Each space is constituted by four arms of two adjacent bricks.

[0004] Checker brick according to JP open Sho 57-161487 Patent Publication, though without the rectangular cross section of the cylindrical body, the cylindrical space having a rectangular cross section of the interior of the brick, the disposed adjacent bricks 4 The cylindrical space having a rectangular cross section constituted by the side walls forms a gas flow path. Recently, there is a tendency that this brick is used frequently.

[0005]

SUMMARY OF THE INVENTION The above Japanese Patent Publication No. 55-45.
The checker brick described in Japanese Patent No. 835 has excellent stability after construction, but does not contribute to heat transfer because its central hub portion is not in contact with the gas flow path. Therefore, there is a problem that the heat transfer efficiency is low.

[0006] Checker brick according to the above JP-Open Sho 57-161487 versa. That is, although the stability after the construction is excellent, the contact portion between the adjacent bricks does not contact the gas flow path and does not contribute to heat transfer. Therefore, there is still a problem that the heat transfer efficiency is low.

As a measure for improving the heat transfer efficiency, for example, a fold is provided in a portion facing the gas flow path, or an appropriate communication hole is provided in a wall constituting a brick to divide the gas flowing in the gas flow path into a gas. Or turbulence in the flowing gas. However, in the former, the effect of generating turbulence is not sufficient, and in the latter, there is a problem that the stability after construction is reduced due to the communication holes provided in the wall.

Accordingly, an object of the present invention is to provide a checker brick capable of improving heat transfer efficiency while maintaining sufficient stability after construction, and a construction method thereof.

[0009]

(1) The checker brick of the present invention comprises first, second, third, fourth, fifth, sixth,
Formed by connecting the seventh and eighth side walls in this order;
A cylindrical body whose outer shape is approximately regular octagon and whose upper and lower ends are open
And the inner space of the cylindrical body extends from its upper end to its lower end.
Forming an internal flow path extending to the first and second
Of the second, third, fourth, fifth, sixth, seventh and eighth sidewalls
Each outer peripheral surface is almost perpendicular to its side wall.
Has a width greater than twice the thickness of the side wall of the
To construct a structure using multiple checker bricks.
The first, third, and fifth checker bricks
And the other four chains at the top or bottom of the seventh side wall.
The first, second, third, fourth, fifth, fifth
6, the lower end of any one of the seventh and eighth side walls or
When the tops are overlapped, the four checker bricks
Are located away from each other, resulting in those four
The outside extending vertically by the gap between the bricks
A flow path is formed .

It is sufficient that the outer shape of the cylindrical body is substantially a regular octagon , and the cylindrical body may be slightly deviated from the regular octagon due to a dimensional error or the like.

Preferably, the first, third, fifth and fifth
Positioning protrusions are formed on the upper end surface of the seventh side wall, respectively.
Is done . In this case, there is an effect that misalignment when building checker bricks belonging to different steps is prevented.

[0012] More preferably, position the upper end surface of the cylindrical body
A positioning projection is formed, and the lower end surface of the cylindrical body is
A depression is formed in which the projection can engage . Also in this case, there is an effect that positional deviation of checker bricks belonging to different steps is prevented.

In the checker brick of the present invention, a communication hole or a projection may be formed on any or all of the side walls to generate a turbulent flow.

(2) According to the checker brick construction method of the present invention, a structure is constructed using a plurality of checker bricks.
A method, wherein each of said plurality of checker bricks
Are the first, second, third, fourth, fifth, sixth, seventh and
The outer shape formed by connecting the eighth side wall in this order is substantially correct.
Consists of an octagonal cylinder with open top and bottom
In addition, the internal space of the cylindrical body extends from its upper end to its lower end.
And the first and second internal channels are formed.
Of the second, third, fourth, fifth, sixth, seventh and eighth sidewalls
Each outer peripheral surface is almost perpendicular to its side wall.
Width greater than twice the thickness of the side wall
In addition, four of the plurality of checker bricks,
Are parallel to each other and the first, second,
Of the third, fourth, fifth, sixth, seventh and eighth sidewalls
So that there is a gap between each other
A first step of arranging in a substantially annular shape on a plane;
On the four checker bricks placed, a plurality of
The second step of loading the other one of the checker bricks
And the checker brick placed in the second step
The first side wall has four check rings arranged in a substantially annular shape.
Parallel to the first side wall of the car brick, and
The second of the checker bricks placed in the second step
The lower end of the side wall of one of the four sidewalls arranged in the first step
Upper end of the fifth side wall of one of the checker bricks
And the checker brick placed in the second step
The lower end of the third side wall of the tile is disposed in the first step.
The other one of the four checker bricks
7 is engaged with the upper end of the side wall and before being mounted in the second step.
The lower end of the fifth side wall of the checker brick is the first side wall.
Of the four said checker bricks arranged in the process
And engaging the upper end of the other one of the first side walls,
The seventh side of the checker brick loaded in two steps
The lower end of the wall has the four chains arranged in the first step.
The upper end of the third side wall of the remaining one of the kicker bricks
And the four of the four
It extends vertically by the gap between checker bricks
An external flow path is formed .

Use in the method of constructing a checker brick of the present invention
The plurality of checker bricks are also
If the outer shape is substantially a regular octagon, it is sufficient.
It may be slightly different from the regular octagon.

Used in the method of constructing a checker brick of the present invention
Each of said plurality of checker bricks
For positioning on the upper end surface of the first, third, fifth and seventh side walls
Are formed, and the checker brick placed in the second step is engaged with the protrusions of the four checker bricks arranged in a substantially annular shape in the first step, and the positioning is performed. Is preferred.

Furthermore, construction of the checker brick of the present invention
Each of the plurality of checker bricks used in the method
There are projections for positioning on the upper end face and the lower end face of the cylindrical body.
And a recess engageable with the projection are formed respectively.
And the depression of the checker brick placed in the second step
The four chis arranged in a substantially annular shape in the first step
Preferably, the positioning is performed by engaging with the protrusions of the Ecker brick .

The checker placed in the second step
Outside the lower part of the first, third, fifth and seventh side walls of the brick
Each of the edges is arranged in a substantially annular shape in the first step.
The fifth side wall, the seventh side wall, and the first side wall of the four checker bricks.
Preferably, it is arranged so as to be located almost directly above the upper inner edge of the side wall and the third side wall .

[0019]

The checker brick according to the present invention has first, second, and third bricks .
The third, fourth, fifth, sixth, seventh and eighth side walls are arranged in this order.
The outer shape is approximately a regular octagon formed by connecting to the upper end and
The lower end is constituted by a cylindrical body having an opening, and the internal space of the cylindrical body is
The space forms an internal channel extending from its upper end to its lower end
And the first, second, third, fourth, fifth, sixth, and
The outer peripheral surface of each of the seventh and eighth side walls is
Width that is greater than twice the thickness of other sidewalls that are substantially perpendicular to it
have. Therefore, checker bricks
When building structures using
Top or bottom of the first, third, fifth and seventh sidewalls
At the end, the first, second and second of the other four checker bricks
Any of the third, fourth, fifth, sixth, seventh and eighth sidewalls
If one of the lower or upper ends is overlapped,
Checker bricks are placed away from each other and
And above by the gap between the four checker bricks
An external flow path extending downward is formed. As a result,
No contact between the outer peripheral surfaces of the checker brick side walls that are in contact
This increases the heat transfer area in contact with the gas flow. Also, each
In addition to the internal channel of the checker brick, an adjacent checker
External channels are also formed between the side walls of the bricks,
Divergence occurs in the gas flow, creating turbulence throughout the gas stream.
As a result, the thermal conductivity can be improved. Further
In addition, since it is not necessary to provide communication holes in the side wall,
Excellent qualitative.

The checker brick construction method of the present invention is described above.
Building a structure using a plurality of checker bricks described in (1)
How to The method comprises the steps of:
Four of the roof tiles have their first side walls parallel to each other.
And the first, second, third, fourth, fifth, sixth, and
Between the opposing ones of the seventh and eighth side walls
Arrange them in a substantially ring shape on a plane so that gaps are created.
A first step, and the four checkers arranged in a substantially annular shape.
-On the brick, the other of the plurality of checker bricks
And a second step of placing one.
The first side wall of the checker brick is arranged in a substantially annular shape.
The first side walls of the four placed checker bricks
Are parallel to each other and before they are placed in the second step.
The lower end of the first side wall of the checker brick is the first side wall.
One of the four checker bricks arranged in the process
Engaging with the upper ends of the five fifth side walls and mounting in the second step.
Lower end of the third side wall of the laid checker brick
Are the four checker bricks arranged in the first step.
Engaging the upper end of the seventh side wall of another of the tiles;
The second of the checker bricks placed in the second step
The lower end of the side wall of No. 5 corresponds to the four fronts arranged in the first step.
The first of the other one of the checker bricks
The tip engaged with the upper end of the side wall and placed in the second step
The lower end of the seventh side wall of the Ecker brick is placed in the first step.
The remaining of the four said checker bricks arranged in
Engaging with the upper end of one of the third side walls,
Gap between the four said checker bricks arranged in the process
Thereby, an external flow path extending in the vertical direction is formed.
As a result, the outer peripheral surfaces of the side walls of adjacent checker bricks
And the heat transfer area in contact with the gas flow increases.
You. Further, in addition to the flow path inside each checker brick, a flow path is also formed between the side walls of the adjacent checker bricks, so that a diverging flow occurs in the moving gas and a turbulent flow is generated in the entire gas flow. . As a result, the thermal conductivity can be improved . Furthermore, since it is not necessary to provide a communication hole in the side wall, the stability after the construction is excellent.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Explain in detail.  First Embodiment FIGS. 1 and 2 show a checker brick according to a first embodiment of the present invention.
The roof tile and its construction method are shown.

In FIG. 1, checker brick 1 has eight rectangular plate-like side walls 11, 12, 13, 14, 15, 1
6, 17 and 18 are connected to each other and are formed of a cylinder having a regular octagonal cross section. Both upper and lower end surfaces of the cylindrical body are open, and are flat surfaces (planes orthogonal to the central axis of the cylindrical body). The cylindrical space 20 inside the cylindrical body serves as a gas flow path.

Eight side walls 11, 12, 13, 14, 1
5, 16, 17 and 18 all have the same shape and thickness. Therefore, those inner peripheral surfaces 11a, 12
a, 13a, 14a, 15a, 16a, 17a and 1
8a are rectangles of the same size as each other, and their outer peripheral surfaces 11b, 12b, 13b, 14b, 15b, 16b,
17b and 18b are also rectangles of the same size. Inner peripheral surfaces 11a, 12a, 13a, 14a, 15a,
The rectangles 16a, 17a and 18a have outer peripheral surfaces 11b,
It is smaller than the rectangles 12b, 13b, 14b, 15b, 16b, 17b and 18b.

The side walls 11, 12, 13, 14, 15, 1
The width of the outer peripheral surface of each of 6, 17 and 18 is set to be larger than twice the thickness thereof. Therefore, as will be described in detail later, when constructing a plurality of bricks 1, it is possible to form a gap serving as a gas flow path between adjacent side walls of the bricks 1 arranged on the same plane. .

Next, the checker brick 1 having the above configuration
Will be described with reference to FIG. In FIG. 2, the lower checker brick 1 is indicated by a solid line, and the upper checker brick 2 is indicated by a broken line. The brick 2 has exactly the same configuration as the brick 1.

The arrangement of the checker bricks according to this construction method is configured such that four checker bricks 1 at the first stage (lower stage) and one checker brick 2 at the second stage (upper stage) constitute one unit. You. Therefore, here, the four bricks 1 drawn (hatched) in FIG. 2 and the area surrounded by the four bricks 1 (hatched) are shown.
One brick 2 will be described.

As shown in FIG. 2, in the first stage, on the same plane, four checker bricks 1 are arranged annularly at the same pitch (equal intervals) in the same direction. In other words, the four bricks 1 are arranged so that the side walls 11 are parallel to each other and the side walls 12 are parallel to each other. Other side wall 1
The same applies to 3, 14, 15, 16, 17 and 18. At this time, a gap is formed between the side walls of the bricks 1 adjacent to each other. The width of this gap, that is, the length in the direction orthogonal to the opposing side walls, is W.

The width W of the gap varies depending on the size of the brick 1, but is preferably set in a range of, for example, 20 mm to 50 mm, and more preferably in a range of 30 mm to 40 mm. This is because if it is smaller than 20 mm, it is difficult for the gas to be diverted as intended in the present invention, and if it is larger than 50 mm, the brick 1 becomes large and the porosity becomes too large. This is because there is a shortage. In the range of 30 mm to 40 mm, the effect of the present invention appears more remarkably.

The second-stage brick 2 is composed of four first-stage bricks 1.
It is located directly above the central area surrounded by. The orientation of the brick 2 is the same as that of the brick 1. At this time, the side wall 21 of the second-stage brick 2 faces the side wall 15 of the first-stage brick 1 on the upper side of FIG. 2, and the side wall 23 of the brick 2 is the side wall of the brick 1 on the left side of FIG. 17 and the side wall 25 of the brick 2
2 faces the side wall 11 of the brick 1 at the bottom of FIG.
Side wall 27 faces the side wall 13 of the brick 1 on the right side of FIG. 2 and is supported by the side walls 15, 17, 11 and 13, respectively. Therefore, the center of the brick 2 coincides with the center of the central area surrounded by the four bricks 1.

As described above, the side walls 11 and 12 of the brick 1
Since the lengths of 13, 14, 15, 16, 17, and 18 are each set to be larger than twice the thickness thereof,
The arrangement shown in FIG. 2 is possible.

As can be seen from FIG. 2, the lower edge of the outer peripheral surface 21b and the lower edge of the inner peripheral surface 21a of the side wall 21 of the second-stage brick 2 correspond to the first-stage brick 1 in the upper part of FIG. The upper edge of the inner peripheral surface 15a and the upper edge of the outer peripheral surface 15b of the side wall 15 substantially overlap with each other. Similarly, the outer peripheral surface 23 of the side wall 23 of the brick 2
The lower edge of b and the lower edge of the inner peripheral surface 23a substantially overlap the upper edge of the inner peripheral surface 17a and the upper edge of the outer peripheral surface 17b of the side wall 17 of the brick 1 on the left side in FIG. 2, respectively. Side wall 25 of brick 2
The lower edge of the outer peripheral surface 25b and the lower edge of the inner peripheral surface 25a respectively correspond to the inner peripheral surface 11a of the side wall 11 of the brick 1 shown in the lower part of FIG.
And the upper edge of the outer peripheral surface 11b. The lower edge of the outer peripheral surface 27b and the lower edge of the inner peripheral surface 27a of the side wall 27 of the brick 2 are the upper edge of the inner peripheral surface 13a and the upper edge of the outer peripheral surface 13b of the side wall 13 of the brick 1 on the right side in FIG. Almost overlap.

Therefore, in the four bricks 1 of the first stage,
The center line of the side wall 15 of the upper brick 1 in FIG. 2 and the center line of the side wall 11 of the brick 1 on the left and right sides are located on a first straight line extending left and right in FIG. And the center line of the side wall 13 of the lower brick 1 and the side wall 1 of the left brick 1
7 is located on a second straight line orthogonal to the first straight line.

The overall structure of the bricks 1 and 2 can be described as follows. In the first stage, a plurality of bricks 1 are arranged in the first direction (in FIG. 2, for example, in the left-right direction) at equal pitches, and a plurality of bricks 1 are arranged in the same manner as the first row. It is composed of a second row whose position is shifted in the first direction by (1/2) of the arrangement pitch of one row. In the second stage, a plurality of bricks 2 are provided for each area surrounded by any four bricks 1 adjacent to each other in a ring shape.
It is arranged on these four bricks 1. The four side walls 11, 13, 15 and 17 of the brick 2 are respectively 4
It is supported by the side walls of the bricks 1.

On the second stage brick 2, a third stage is further added.
When constructing each stage of the fourth stage,..., The same arrangement as the first stage is arranged as the third stage on the second stage.
The same as the arrangement of the second stage is arranged as the fourth stage on the stage. Thereafter, the same pattern is repeated as necessary.

As described above, the checker brick 1 of this embodiment is constructed in the form shown in FIG. 2 so that the first, second, third,... , In the first place, a substantially rectangular space surrounded by four bricks 2 of the second stage is located directly above the cylindrical space 20 inside the bricks 1 of the first stage, The cylindrical space 20 inside the third-stage brick 1 is located directly above it. In the second place, the cylindrical space 30 inside the second-stage brick 2 is located directly above the substantially rectangular space surrounded by the first-stage four bricks 1, A substantially rectangular space surrounded by four bricks 1 in the third tier is located above.

Further, at the third location, just above the gap between the opposing sides of the two adjacent bricks 1 of the first stage, the opposing side surfaces of the two adjacent bricks 2 of the second stage And a gap between the opposing side faces of two adjacent bricks 1 of the third tier is located immediately above.

Therefore, the gas can flow upward or downward through the flow paths in the first, second and third places, so that the gas is easily diverted, and the gas flows in each stage. Since there is an increase / decrease in the cross-sectional area of the passage and a change in the cross-sectional shape, turbulence can be easily generated in the entire gas. In addition, since the side walls of the adjacent checker bricks 1 or 2 do not contact each other in the same step, the outer peripheral surfaces of those side walls also contribute to heat transfer, and there is no surface that does not contribute to heat transfer unlike the conventional checker brick. As a result, higher heat transfer efficiency than before can be obtained.

Further, in the checker bricks 1 and 2 of this embodiment, since the communication holes need not be provided in the side walls of the bricks 1 and 2, the stability after the construction is excellent.

In the above embodiment, the side walls 11, 12, 13, 14, 15, 16, 17 and 18 of the checker brick 1 are used.
Are equal, but they need not be the same. As shown in FIG. 2, the width of the side wall supported by any of the side walls 11, 12, 13, 14, 15, 16, 17 and 18 of the brick 1 at the time of construction is a, and the width of the unsupported side wall is Assuming that b, the ratio (b / a) of the two is desirably substantially equal to 1, and at least 0.8 ≦ (b / a).
a) It is necessary to satisfy the relationship of ≦ 1.2.

When the total cross-sectional areas of the gas passages are made equal to each other, and the heat transfer area of the checker brick 1 of this embodiment is compared with that of the above-mentioned conventional cross-shaped or box-shaped checker bricks, they are approximately equal to each other. It was found to increase by 10%.

Second Embodiment FIGS. 3 to 5 show a checker brick according to a second embodiment of the present invention and a construction method thereof . Checker brick 5 of the second embodiment
In order to prevent displacement during construction, the side walls 12, 1
Projections 52c, 54c, 56 on the upper surfaces of 4, 16 and 18
The configuration is the same as that of the checker brick 1 of the first embodiment except that c and 58c are provided. Sidewall 11, 1
No projections are formed on the lower surfaces of 2, 13, 14, 15, 16, 17, and 18, and they are flat surfaces.

Projections 52c, 54c, 56c and 58c
As shown in FIG. 3 and FIG.
4, 16 and 18 are formed at the center and perpendicular to them. Also, all extend over the entire thickness of the side walls 12, 14, 16 and 18.

The construction method of the checker brick 5 having the above configuration is the same as that of the first embodiment.
The only difference is that positioning is performed using 2c, 54c, 56c and 58c. In the second embodiment, the protrusions 5 of the four bricks 5 arranged in the first (lower) ring
The positions of the second (upper) checker bricks 6 having the same configuration as the bricks 5 are determined almost automatically by 2c, 54c, 56c and 58c, so that the positioning of the bricks 6 is easier than in the first embodiment. There is an advantage.

In the second embodiment, the projections 52c, 54c, 5c
Although the cross-sectional shapes of 6c and 58c are substantially rectangular, any other shapes can be applied as long as positional deviation during the construction of the checker bricks 5 and 6 can be prevented. Also,
The size of the projections 52c, 54c, 56c, and 58c is such that when the brick 6 is overlaid on the brick 5, as shown in FIG.
It suffices if it locks to c, 54c, 56c and 58c to prevent further movement.

Third Embodiment FIGS. 6 to 8 show a checker brick according to a third embodiment of the present invention and a construction method thereof. In the third embodiment, there is an advantage that the displacement of the checker brick does not easily occur and the construction work becomes easy.

The checker brick 7 of the third embodiment is provided with a pair of projections 71 and 72 on its upper surface and a pair of recesses 73 and 74 on its lower surface in order to prevent displacement during construction. The configuration is the same as that of the checker brick 1 of the first embodiment. The pair of depressions 73 and 74 are located at positions corresponding to the pair of projections 71 and 72, respectively, in other words, at positions immediately below the pair of projections 71 and 72.

As shown in FIGS. 6 and 7A, the protrusion 71 is formed over the entire side wall 13 and a part of the side walls 12 and 14 adjacent to the side wall 13.
Each extends slightly beyond the center of the side walls 12 and 14. The protrusion 72 is formed on the entire side wall 17 and the side wall 17.
And a portion of the side walls 16 and 18 adjacent to the side walls 16 and extends slightly beyond the center of the side walls 16 and 18 respectively. The thickness of the projections 71 and 72 is the same as the thickness of the side walls 12, 13, 14, 16, 17 and 18.

The depression 73 is formed over the entire side wall 13 and a part of the side walls 12 and 14 adjacent to the side wall 13, and extends slightly to the center of the side walls 12 and 14, respectively. The depression 74 is formed over the entire side wall 17 and a part of the side walls 16 and 18 adjacent to the side wall 17, and extends slightly to the center of the side walls 16 and 18, respectively. The depressions 73 and 74 are provided on the side walls 12, 13, 14, 16, 17,
And 18 over the entire thickness.

The construction method of the checker brick 7 having the above-described configuration is the same as that of the first embodiment, except that the positioning is performed using the pair of projections 71 and 72 at the time of construction. That is, as shown in FIG.
When the four bricks 7 of the step are arranged in an annular shape, a pair of projections 71 and 73 are arranged on two opposing side walls among the four side walls forming the cylindrical region having the rectangular cross section. . The pair of protrusions 71 and 73 are provided with a second-stage brick 8.
A pair of recesses 73 and 74 at the lower end of the pair engage respectively. In this way, there is no horizontal displacement of the brick 8 during construction.

In the third embodiment, the projections 71 and 72 of the four bricks 7 arranged in the first stage (lower stage) in a ring form
Since the position of the second (upper) checker brick 8 having the same configuration as the brick 7 is determined almost automatically, there is an advantage that the positioning of the brick 8 is easier than in the first embodiment.

In the third embodiment, a pair of projections 71 and 7
Although the cross-sectional shape of each of the pair 2 and the recesses 73 and 74 is substantially rectangular, any other shape can be applied as long as it can prevent displacement of the checker bricks 7 and 8 during construction.

[0052]

According to the checker brick of the present invention and its construction method, the heat transfer efficiency can be improved while maintaining sufficient stability after construction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a checker brick according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a method of constructing the checker brick of FIG. 1;

FIG. 3 is a perspective view of a checker brick according to a second embodiment of the present invention.

FIG. 4 (a) is a plan view of the checker brick of FIG. 3,
(B) is a front view thereof.

FIG. 5 is an explanatory view showing a method of constructing the checker brick of FIG. 3;

FIG. 6 is a perspective view of a checker brick according to a third embodiment of the present invention.

7 (a) is a plan view of the checker brick of FIG. 6,
(B) is a front view thereof.

FIG. 8 is an explanatory diagram showing a method of constructing the checker brick of FIG. 6;

[Explanation of symbols]

1 checker bricks 11, 12, 13, 14, 15, 16, 17, 18, 1
9 checker brick side walls 11a, 12a, 13a, 14a, 15a, 16a, 1
7a, 18a Inner peripheral surface of side wall of checker brick 11b, 12b, 13b, 14b, 15b, 16b, 1
7b, 18b Outer peripheral surface of checker brick side wall 20 Cylindrical space inside checker brick 2 Checker brick 21a, 23a, 25a, 27a Inner peripheral surface of checker brick side wall 21b, 23b, 25b, 27b Outer periphery of checker brick side wall Surface 30 tubular space inside checker brick 5 checker brick 52c, 54c, 56c, 58c protrusion 6 checker brick 60 tubular space inside checker brick 7 checker brick 71, 72 protrusion 73, 74 recess 8 checker brick 80 checker brick Inside cylindrical space

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-106979 (JP, A) JP-B 63-24240 (JP, B2) JP-B 3-80728 (JP, B2) JP-B Hei 4- 40290 (JP, B2) Jikohei 50-5010 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F27D 1/04 F27D 1/16 F28D 20/00 C03B 5/237

Claims (7)

(57) [Claims] (1)First, second, third, fourth, fifth, sixth,
Formed by connecting the seventh and eighth side walls in this order;
A cylindrical body whose outer shape is approximately regular octagon and whose upper and lower ends are open
Is composed,The internal space of the cylindrical body extends from its upper end to its lower end
Forming an internal flow path, The first, second, third, fourth, fifth, sixth, seventh and
The outer peripheral surface of each of the eighth side walls is approximately
With a width greater than twice the thickness of the other side walls
Yes, Moreover, a structure is constructed using a plurality of the checker bricks.
When building, the first, third, and third checker bricks
At the top or bottom of the fifth and seventh side walls, the other four
The first, second, third, fourth, fifth,
The lower end of any one of the sixth, seventh and eighth side walls or
The four checker bricks are stacked on top of each other.
The tiles are placed away from each other, which results in those four chips
The outside extending vertically by the gap between the bricks
A partial flow path is formed A checker brick, characterized in that: 2. The first, third, fifth and seventh side walls.
The checker brick according to claim 1, wherein positioning protrusions are formed on upper end surfaces of the checker bricks, respectively. 3. A positioning projection is formed on an upper end surface of the cylindrical body, and the projection is engageable with a lower end surface of the cylindrical body.
The checker brick according to claim 1, wherein a depression is formed . (4)Structure using multiple checker bricks
How to build, Each of the plurality of checker bricks is a first, second,
The third, fourth, fifth, sixth, seventh and eighth sidewalls are
The outer shape is approximately regular octagon, formed by connecting
And a cylindrical body having an opening at the lower end.
An internal passage in which the internal space of the body extends from its upper end to its lower end
And the first, second, third, fourth, and fourth
Outer peripheral surface of each of fifth, sixth, seventh and eighth side walls
Is 2 thicknesses of other side walls that are substantially orthogonal to the side walls.
Has a width greater than twice Further, four of the plurality of checker bricks are
The first side walls are parallel to each other, and the first and second
Of the second, third, fourth, fifth, sixth, seventh and eighth sidewalls
There is a gap between the opposing ones
A first step of arranging in a substantially annular shape on a plane, On the four checker bricks arranged in a substantially annular shape,
The second one to place another one of the plurality of checker bricks
With two steps, The second of the checker bricks placed in the second step
One side wall has four checker bricks arranged in a substantially annular shape.
Parallel to the first side wall of the tile, Moreover, the checker brick placed in the second step
The lower end of the first side wall is disposed in the first step.
The fifth side of one of the four checker bricks
Engages the upper edge of the wall, The second of the checker bricks placed in the second step
The lower end of the side wall of the third is the four front arranged in the first step
Of the seventh side wall of another one of the checker bricks
Engage the top edge, The second of the checker bricks placed in the second step
The lower end of the side wall of No. 5 corresponds to the four fronts arranged in the first step.
The first of the other one of the checker bricks
Engages the upper edge of the side wall, The second of the checker bricks placed in the second step
The lower end of the side wall of No. 7 is the four fronts arranged in the first step.
The third side wall of the remaining one of the checker bricks
Engaged with the upper end of Of the four checker bricks arranged in the first step
External channels that extend vertically are formed by gaps between them
A method for constructing checker bricks, characterized by being performed. 5. The method according to claim 5 , wherein each of said checker bricks comprises
For positioning on the upper end surface of the first, third, fifth and seventh side walls
Before being mounted in the second step.
The checker brick is arranged in a substantially annular shape in the first step.
Engaging the protrusions of the four checker bricks,
The method for constructing a checker brick according to claim 4, wherein positioning of the checker brick is performed . 6. Each of said checker bricks comprises :
Positioning projections and projections are formed on the upper end face and the lower end face of the cylindrical body.
Recesses engageable with each other are formed, and
The depression of the checker brick placed in two steps is
The four checker bricks arranged in a substantially annular shape in the first step
Engage with the protrusion of the roof tile and check that it is positioned.
A method for constructing a checker brick according to claim 4 . 7. The checker mounted in the second step
-Peripheries of the first, third, fifth and seventh side walls of the brick
The lower ends of the surfaces are respectively arranged in a substantially annular shape in the first step.
The fifth side wall and the seventh side of the four checker bricks
Almost directly above the upper end of the inner peripheral surface of the wall, the first side wall and the third side wall
The method for constructing a checker brick according to any one of claims 4 to 6, wherein