JP2003147880A - Concrete block connecting member, concrete block connecting structure, and method for producing concrete block having connecting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete block connecting member which facilitates positioning of blocks to each other at the time of constructing masonry, has excellent workability, has few limitations in terms of strength and appearance, and can maintain the strength necessary for a structure, and to provide a concrete block connecting structure and a method for producing the concrete block connecting structure. SOLUTION: The concrete block connecting member 10 is formed of a columnar bearing portion 11, a rotation shaft portion 12, and an engaging portion 13. The columnar bearing portion 11 is rotatably embedded in one of the concrete blocks to be connected together. The rotation shaft portion 12 has its base-side end axially supported by a circumferential surface of the columnar bearing portion 11. The engaging portion such as a nut is screwed on a distal end of the rotation shaft portion 12 to be rotated, and functions to engage with an engagement receiving portion of the other concrete block.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a concrete block connecting member for connecting concrete blocks used for building foundations, walls, gutters, revetment blocks, etc., a concrete block connecting structure, and a connecting structure. The present invention relates to a method for manufacturing a concrete block.

[0002]

2. Description of the Related Art Conventionally, structures such as reinforced concrete are
It may be configured by connecting a plurality of concrete blocks manufactured outside the site, and as a method of joining the concrete blocks, for example, the following technique is known. (1) Japanese Patent Application Laid-Open No. 6-287963 discloses a base unit,
A joint member for laying a foundation concrete block arranged at a side end of a rising portion projecting at a predetermined height on the base portion, the first joint member having a convex portion Is disposed in one of the adjacent concrete blocks for foundation, and a second joint member having a concave portion having a shape capable of fitting with the convex portion is disposed in the other concrete block for foundation, and a first joint member is provided. There is described a joint member for continuously arranging a concrete block for foundation, in which both of them are closely fixed by a joining means for fitting the convex portion of the above into the concave portion of the second joint member. (2) In Japanese Unexamined Patent Publication No. 9-183069, blocks of concrete or the like are joined together at their end faces, and a bolt is inserted into a flange portion provided on a side surface of the block to project the tip of the bolt from the flange portion. It is described that the nut is tightened with a tightening tool such as a ratchet. (3) In Japanese Unexamined Patent Publication No. 2000-336662, the end portions of the basic block are joined together by a phase shift in plan view, and the ends joined by the phase shift are joined by the phase shift. A connection structure of a basic block is described, which is joined and fixed with a bolt having an axis in a direction orthogonal to a plane.

[0003]

However, the above conventional techniques have the following problems. (1) In the joint member described in Japanese Patent Laid-Open No. 6-287963, although the alignment between blocks at the time of construction is facilitated, a separate tightening means or the like is required to firmly join adjacent concrete blocks. In addition, there is a problem in that it is necessary and is limited in places to which it can be applied due to restrictions in terms of strength and appearance, resulting in poor versatility. (2) In the concrete block disclosed in JP-A-9-183069, in which a bolt is inserted into the flange portion of the concrete block and the two blocks are fastened to each other through the bolt, the bolt insertion hole is provided from the outside. Since it cannot be visually inspected, there was a problem that it was difficult to align the two blocks, it took time to adjust them, and workability was lacking. (3) In the connection structure of the basic blocks described in JP-A-2000-336662, in which both blocks joined together by phase-shifting are fastened with bolts, the structure of the joint is complicated and lacks versatility. In addition, there is a problem that it may be difficult to maintain the strength required as a structure due to lack of effective wall thickness and the like. The present invention has been made to solve the above-mentioned problems, and it is easy to align the blocks during construction and has excellent workability, and there are few restrictions on the strength surface and appearance, and the strength required as a structure is maintained. It is an object of the present invention to provide a concrete block connecting member that can be used, a concrete block connecting structure, and a method for manufacturing the same.

[0004]

According to a first aspect of the present invention, there is provided a concrete block connecting member, which has a cylindrical support portion rotatably embedded in one of the concrete blocks connected to each other, and the cylindrical support portion. A rotating shaft portion, the base end side of which is axially supported and attached to the circumferential surface of the support portion, and a hook receiving portion of the other concrete block that is screwed to the tip end side of the rotating shaft portion that is rotated. It is configured to include a hooking portion such as a nut to be stopped. As a result, the rotating shaft portion can be rotated so that the hook receiving portion of the other concrete block can be hooked, which facilitates alignment between the blocks during construction and improves workability. Excel. Also,
Since the columnar support portion is embedded in the concrete block, there are few restrictions in terms of strength and appearance and the strength required for the structure can be maintained. Here, the columnar support portion is preferably made of a metal such as stainless steel from the viewpoint of improving the strength, but the present invention does not specify the material. For example, plastic such as polycarbonate can be used. Also, its shape is
A cylindrical shape having a hollow portion inside can also be applied, and the cylindrical shape of the present invention includes an oval shape, a spherical shape, an abacus ball shape and the like having a circular cross section as long as the shape is rotatable. . The rotating shaft portion is preferably made of metal such as stainless steel in terms of improving strength, but the present invention does not specify the material. For example, plastic such as polycarbonate can be used. Moreover, the base end side is fixed to the circumferential surface of the columnar support portion by screwing or welding. When the rotation shaft portion is screwed to the columnar support portion, the rotation shaft portion can be manufactured by threading at least both ends of the rod-shaped body.

In the concrete block connecting structure according to a second aspect of the present invention, the concrete blocks A and B to be connected to each other, the exposed surface side perpendicular to the connecting surface of the concrete blocks A and B, and the connecting surface side. Inside the cylindrical cavity portion, and the rotating shaft portion insertion groove formed by opening in each of them, the cylindrical cavity portion provided on the end side thereof in communication with the rotating shaft portion insertion groove of the concrete block A, and provided in the cylindrical cavity portion. A columnar support portion rotatably arranged at a predetermined interval, and a base end side of which is attached to the circumferential surface of the columnar support portion such that the base end side of the columnar support portion is attached to the support portion of each of the concrete blocks A and B. The rotating shaft part, which is inserted into the moving shaft part insertion groove and whose tip side is rotatably arranged, communicates with the rotating shaft part insertion groove of the concrete block B, and the rotating shaft part is provided on the exposed surface side. Open larger than the width of the insertion groove Formed Te, hooking portions such as a nut screwed on the distal end side of the pivot shaft portion is formed and a hooking receiving portion to be hooked. This structure has the following effects. (A) The concrete blocks A and B are each provided with a rotary shaft insertion groove, and the rotary shaft is provided on the concrete block A.
It can be rotated about a columnar support portion buried in the fulcrum. Therefore, by bringing the connecting surfaces of the concrete blocks A and B into contact with each other and turning the turning shaft portion, the tip end side of the turning shaft portion to which the hooking portion is screwed is hooked on the concrete block B. The concrete blocks A and B can be firmly fastened to each other by pushing the hooks into the catch receiving portions to lock them, and then rotating the latching portions to reduce the distance between the latching portions and the cylindrical support portion and tightening. (B) Since the concrete block connecting members including the columnar support portion, the rotating shaft portion, and the hook portion are all housed in the concrete blocks A and B, the area of the portion opened to the outside can be reduced, and the appearance is improved. It is possible to prevent damage and accumulation of dust and the like. (C) Since the concrete block connecting member is arranged in advance in the concrete block, the work of connecting the concrete blocks to each other on site can be quickly performed. The concrete block also includes a concrete product having a predetermined shape for a specific purpose such as a gutter. (D) By connecting a large number of combinations of the concrete blocks A and B, a long concrete block wall can be formed. Further, by connecting the concrete blocks vertically, a multi-stage concrete block wall can be formed. Further, by connecting the concrete blocks in a combination of the horizontal direction and the vertical direction, it is possible to form a concrete block wall having a large area. In this case, the rotating shaft insertion groove and the hook receiving portion of the concrete block B are formed on the connecting surface on the opposite side of the concrete block A, and the connecting block on the opposite side of the concrete block B is formed on the connecting surface on the opposite side. It is necessary to form the rotary shaft insertion groove and the cylindrical support portion of A.

According to a third aspect of the invention, there is provided a concrete block connecting structure according to the second aspect of the invention, wherein the hook receiving portion has a box-shaped hollow portion opened to the concrete block B. The inner side wall of the box-shaped hollow portion which is in contact with is spread and inclined at the back side and is arranged so as to be inclined.
Since the inner side wall of the box-shaped cavity is spread out and inclined toward the back side, when the hooking part such as a nut that abuts against the inner side wall and is hooked by the rotating shaft part is pulled to the back side. It is possible to more reliably hold the connection structure between the concrete blocks without causing the force to move so as to disengage to the front side. The concrete block connecting structure according to the present invention can also form a connecting structure in which a large number of concrete blocks are connected in the same manner as described in (d) above.

A method for manufacturing a concrete block according to claim 6 is a method for manufacturing a concrete block having a connection structure for concrete blocks according to claim 2 or 3, wherein the formwork for forming the concrete block A is formed. Inside each of the two sides of the mold surface, a rectangular mold having one end contacted is arranged, and at the other end connected to the rectangular mold, a cylindrical support portion having a coating layer formed thereon is provided. It is arranged so that ready-mixed concrete is cast into the mold and cured. This structure has the following effects. (A) After the ready-mixed concrete is hardened, the rectangular form frame made of synthetic resin or the like can be pulled out, burned, or crushed to remove the concrete form. It is possible to easily form the rotary shaft portion insertion groove into which the rotary shaft portion for connection is inserted. (B) Since the coating layer of grease or the like is formed on the columnar support portion, adhesion with concrete can be prevented, and the columnar support portion whose periphery is buried can be rotated. Connection structure of concrete blocks by pivotally supporting the rotating shaft part on the support part, providing a hooking part at the tip of the rotating shaft part, and hooking this to the hooking receiving part formed on the other concrete block Can be formed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) A concrete block connecting structure using a concrete block connecting member of Embodiment 1 of the present invention will be described. FIG. 1 is a plan view of a concrete block connecting member according to the first embodiment. In FIG. 1, 10 is a concrete block connecting member of the first embodiment, 11 is a columnar support portion made of stainless steel or the like which is rotatably embedded in one concrete block A that is connected to each other, and 12 is a columnar shape. A rotating shaft portion, the base end side of which is axially supported and attached to a central portion on the circumferential surface of the supporting portion 11, and a rotating shaft portion 1 which is rotated.
2 is a hooking portion such as a nut that is screwed to the tip end side of 2 and is hooked to the hooking receiving portion of the other concrete block B. The cylindrical support portion 11 is made of steel and has a height of, for example, 5 to 20 cm.
It is a cylindrical or cylindrical member having a diameter of about 3 to 10 cm, for example, and a thin coating layer of grease, glycerin, coal tar, oil, polyethylene, polystyrene or the like is formed on the surface thereof, so that the concrete block Even when it is cast inside, adhesion with concrete is prevented, and a gap with concrete can be secured around it. By forming the coating layer, even when the columnar support portion 11 is cast into a concrete block, the columnar support portion 11 is prevented from adhering to the concrete, and the coating layer has a lubricating action, The columnar support 11 can be rotated. Further, the base end portion 1 of the rotary shaft portion 12 formed in a rod shape made of steel or the like substantially at the center of the columnar support portion 11.
2'is attached by welding means or screwing means.

2 (a) and 2 (b) are a front view and a sectional view taken along the line X--X in the front view, respectively, of the concrete block connecting structure according to the first embodiment. In FIG. 2, reference numeral 20 denotes a concrete block connecting structure using the concrete block connecting member 10, 21 is a connecting surface of the concrete blocks A and B, and 22 and 23 are concrete blocks A perpendicular to the connecting surface 21. , B are exposed surfaces, and 24 and 25 are cavities formed in the concrete blocks A and B, respectively, and the rotating shaft portion is inserted through the connecting surface 21 and the exposed surfaces 23 and 24, respectively. The grooves 26 communicate with the rotary shaft insertion groove 24 of the concrete block A, and are provided on the end side of the rotation shaft insertion groove 24.
Are cylindrical cavities arranged with a predetermined interval, and 27 is a cavity formed in the concrete block B, which is formed so as to communicate with the rotation shaft insertion groove 25 and open to the exposed surface 23 side. The hooking portion 13 of the rotating shaft portion 12 is a hooking receiving portion. As described above, the concrete block A is provided with the rotary shaft portion insertion groove 24 that opens toward the connecting surface 21 and the exposed surface 22 and the cylindrical cavity portion 26 in which the cylindrical support portion 11 is embedded. There is. In addition, in the other concrete block B joined to the concrete block A, a rotation shaft portion insertion groove 25 opened toward the connecting surface 21 and the exposed surface 23, and a hook receiving portion opened on the exposed surface 23 side. Has 27.

Hereinafter, a method for manufacturing a connection structure for concrete blocks will be described. Such a concrete block A is made of rubber, plastic, or the like for embedding the columnar support portion 11 and further forming the rotary shaft portion insertion groove 24.
An easily removable rectangular mold made of a material such as wood is brought into contact with the columnar support portion 11 and placed at a predetermined position so that the end of the rectangular mold is exposed. It is possible to manufacture by manufacturing the concrete by pouring it into the mold, and then breaking or removing the rectangular formwork to form a cavity. Further, the concrete block B has a rectangular frame part made of plastic or the like for forming the rotary shaft part insertion groove 25, and an exposed surface 2 at one end.
And a substantially rectangular parallelepiped-shaped hook receiving portion forming frame portion that comes into contact with the 3 side are integrally or detachably arranged at a predetermined position,
It can be formed by pouring ready-mixed concrete into a mold to cure the ready-mixed concrete, and then breaking or removing the rectangular form and the hook receiving part forming form.

Next, a method of forming the concrete block connecting structure 20 using the concrete block connecting member 10 will be described with reference to the drawings.
3 (a), (b), and (c) are schematic diagrams of a work procedure when forming a connection structure of concrete blocks. First, as shown in FIG. 3A, the concrete block A and the concrete block B are respectively arranged at predetermined positions. At this time, the female screw portion 11 formed in advance on the cylindrical support portion 11 from the rotation shaft portion insertion groove 24 formed by opening to the exposed surface 22 side of the concrete block A to the base end side of the rotation shaft portion 12 is formed. 'It can be attached by screwing. In this case, the female screw part 1 is provided around the cylindrical support part 11.
By forming a plurality of 1 ', the rotating shaft portion 12
It is possible to easily screw the base end side 12 ′ of the above into the cylindrical support portion 11. Further, a plurality of recesses are formed in place of the female screw portion 11 ′, the tip of a driver or the like is inserted into the recessed portion, and the columnar support portion 11 is rotated, so that the rotary shaft portion 12 is easily screwed into the female screw portion. 11 'can be combined. As an alternative method for attaching the rotating shaft portion 12 to the columnar support portion 11, the columnar support portion 11 may be fixed and attached in advance by welding means or the like. Next, as shown in FIG. 3A, the columnar support 11 is rotated and arranged so that the rotary shaft 12 projects toward the exposed surface 22. Then, as shown in FIG. 3 (b), the concrete block A and the concrete block B are brought into contact with each other via the connecting surface 21 to be positioned, and the rotating shaft portion 12
The hooking portion 13 including a nut, a washer and the like is attached to the tip side of the. In FIG. 3C, the turning shaft portion 12 is turned in the direction of arrow P to be inserted into the turning shaft portion insertion groove 25 of the concrete block B, and the hooks attached to the turning shaft portion 12 are shown. The part 13 is hooked on the end 27 ′ of the hook receiver 27. Next, the hooking portion 13 is tightened and moved by using a tool such as a ratchet, and the columnar support portion 11 and the hooking portion 13 are moved.
The concrete blocks A and B are connected and fixed by narrowing the distance between them.

Since the concrete block connecting member and the concrete block connecting structure according to the first embodiment are configured as described above, they have the following effects. (A) By rotating the rotating shaft portion 12 which is rotatably fixed via the columnar support portion 11 embedded in the concrete block A, the retaining portion 27 of the concrete block B is engaged therewith. The part 13 can be hooked, and both blocks can be easily aligned and connected at the time of construction. (B) Since the columnar support portion 11 is embedded in the concrete block A, there are few restrictions in terms of strength and appearance and the strength required as a structure can be maintained. (C) The concrete blocks A and B are provided with rotary shaft insertion grooves 24 and 25, respectively, and the rotary shaft 12 can be rotated about the columnar support 11 embedded in the concrete block A as a fulcrum. The rotating shaft portion 12 in which the hooking portion 13 is screwed by rotating the rotating shaft portion 12 by bringing the connecting surfaces 21 of A and B into contact with each other.
The front end side of the concrete block B is pushed into the latch receiving portion 27 of the concrete block B for latching, and then the latching portion 13 is rotated to reduce the distance between the latching portion 13 and the columnar support portion 11 and tighten the concrete. The blocks A and B can be firmly fastened to each other. (D) without exposing the connecting and fixing member to the outside,
Since the concrete block connecting member 10 including the columnar support portion 11, the rotating shaft portion 12, and the hooking portion 13 is all housed in the concrete blocks A and B, a compact connected concrete block can be formed, and It is possible to prevent the appearance from being impaired and the accumulation of dust and the like. (E) Since the concrete block connecting member 10 is arranged in the concrete block, the work of connecting the concrete blocks to each other can be quickly performed on site.

(Second Embodiment) A concrete block joining structure using a concrete block connecting member according to a second embodiment of the present invention will be described. 4 (a),
(B) is the front view of the connection structure of the concrete block of Embodiment 2, and the YY sectional arrow view in the front view, respectively. In FIGS. 4A and 4B, 30 indicates a concrete block connecting structure using the concrete block connecting member 10, 31 is arranged on the concrete block B, and the concrete block connecting member 1 is provided.
0 is a hook receiving portion having a box-shaped hollow portion opened on the front side in the drawing, on which the hook portion 13 of 0 is hooked, and 32 is
An inclined surface that corresponds to the end portion 27 'of the hook receiving portion 27 shown in the first embodiment and that is formed by expanding the inner side wall of the box-shaped cavity with which the hook portion 13 abuts toward the back side. Is. In addition, about the thing which has the same function as Embodiment 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

The hook receiving portion 31 of the connection structure 30 of the concrete blocks has an inclined surface 32 in which the inner side wall of the box-shaped hollow portion spreads to the inner side and is inclined in a reverse taper shape. Hooking part 1 such as a nut that abuts and is hooked
When 3 is fastened and fixed to the rotating shaft portion 12, the hooking portion 1
3 is the back side of the hook receiving portion 31 (indicated by an arrow Q in FIG. 4B)
Since the force acts to move the concrete blocks A to B (see the arrow R in FIG. 4B), the concrete blocks A and B can be more reliably held together.

The hook receiving portion 31 having such a structure is an internal formwork in which a part or the whole of the formwork of the concrete block B is made of an elastic member such as rubber, wood, or foam resin such as polystyrene. Can be formed by arranging and crushing and removing the fresh concrete after hardening.
When the columnar support portion 11 is embedded in the concrete block A, a predetermined thickness, for example, a thickness of 1 to 5 mm, is provided around the columnar support portion 11 so that the columnar support portion 11 can rotate after pouring fresh concrete. A sheet of paper, a synthetic resin film, or the like is wound to form a coating layer, and after the concrete is solidified, a gap is formed between the concrete and the columnar support portion 11 so that it can rotate. Further, grease, coal tar, glycerin or the like may be formed around the columnar support portion 11 to form a coating layer to prevent adhesion with the cast concrete.

At the time of pouring concrete, the base end portion 12 'of the rotary shaft portion 12 formed in advance on the columnar support portion 11 is used.
It is preferable to close the screw hole 15 so that fresh concrete does not flow into the screw hole 15 into which the screw is screwed.
Further, since the rotary shaft insertion grooves 24 and 25 are formed in the molds of the concrete blocks A and B, respectively,
It is formed by arranging an internal formwork, a part or all of which is made of an elastic member such as rubber, wood, and foamed resin such as polystyrene, and crushing and removing the concrete after hardening it.

The concrete blocks A and B can be formed into a concrete block connecting structure 30 by using the concrete block connecting member 10. FIG. 5 is a schematic perspective view of the structure of the connection structure 30 of the concrete blocks. In FIG. 5, the concrete block connecting member 10 is shown only on the front side of the drawing,
Although not shown, a similar concrete block connecting member 10 may be provided on the other side of the concrete block to connect and fix both blocks on both sides of the concrete block.

In the concrete block connecting structure of the present invention, as shown in FIG. 6, a large number of concrete block connecting bodies can be formed by connecting a large number of combinations of concrete blocks A and B. For example, a concrete gutter is connected. Furthermore, it is also possible to connect the concrete blocks in the horizontal and vertical directions by using the connecting members of the present invention on the top, bottom, left and right respectively. By connecting such a combination of concrete blocks A and B vertically and horizontally, it is possible to form a concrete block wall having a large area. For example, a seawall block can be formed.

[0019]

EFFECTS OF THE INVENTION According to the present invention, alignment between blocks during construction can be easily performed, workability is excellent, there are few restrictions in terms of strength and appearance, and strength required for a structure can be maintained. it can. That is, the rotating shaft portion of the concrete block connecting member can be rotated so that the hook receiving portion of the other concrete block can hook the hook portion, so that the connecting work between the blocks can be facilitated. In addition, since the columnar supporting portion is embedded in the concrete block, it is possible to provide a concrete block connecting structure that can maintain the strength required as a structure with few restrictions in terms of strength and appearance, and also to provide a connecting mechanism. It is possible to easily manufacture the provided concrete block. Furthermore, by connecting many concrete blocks of the present invention, a concrete block wall having a wide area can be formed.

[Brief description of drawings]

FIG. 1 is a plan view of a concrete block connecting member according to a first embodiment.

2A is a front view of the concrete block connection structure according to the first embodiment, and FIG. 2B is a front view of X in the front view.
It is a -X sectional arrow line view.

FIG. 3 is a schematic explanatory view of a work procedure in a concrete block connection structure.

FIG. 4 (a) is a front view of a concrete block connecting structure according to a second embodiment, and FIG. 4 (b) is a Y view of the front view.
It is a Y-section arrow line view.

5 is a schematic perspective view of the structure of a concrete block connection structure 30. FIG.

FIG. 6 is a schematic view showing a concrete block connection body in which a large number of combinations of concrete blocks A and B are connected.

[Explanation of symbols]

10: Concrete block connecting member 11: Cylindrical support 12: Rotating shaft 13: Hook 20: Connection structure of concrete blocks 21: Connecting surface 22: Exposed surface 23: exposed surface 24: Rotating shaft insertion groove 25: Rotating shaft insertion groove 26: Cylindrical cavity 27: Hook receiving part 30: Connection structure of concrete blocks 31: Hook receiving part 32: inclined surface

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2E125 AA53 AA70 AE02 AG24 AG60                       BA02 BA22 BB09 BB30 BD01                       BE05 BE08 BF04 CA04 CA93                 3J022 DA12 EA11 EB02 FA01 FB12                       GA06 GA12 GB33

Claims (6)

[Claims] 1. A columnar support portion rotatably embedded in one of the concrete blocks connected to each other, and a rotary shaft having a base end side pivotally attached to a circumferential surface of the columnar support portion. And a hooking portion such as a nut that is screwed to the tip end side of the rotating shaft portion that is rotated and is hooked to a hooking receiving portion of the other concrete block. Member for connection. 2. Concrete blocks A and B connected to each other, and a rotary shaft formed by opening on an exposed surface side and a connection surface side perpendicular to a connection surface of the concrete blocks A and B, respectively. Part insertion groove, a cylindrical cavity portion provided on the end side of the concrete block A so as to communicate with the rotation shaft insertion groove of the concrete block A, and rotatably with a predetermined space in the cylindrical cavity portion. A columnar support portion to be arranged, and a base end side of which is axially supported and attached to a circumferential surface of the columnar support portion, and the tip end is inserted into the respective rotation shaft portion insertion grooves of the concrete blocks A and B. The rotating shaft portion whose side is rotatably disposed communicates with the rotating shaft portion insertion groove of the concrete block B, and is formed on the exposed surface side so as to open larger than the width of the rotating shaft portion insertion groove. , A nut that is screwed to the tip side of the rotating shaft portion. Connection structure of the concrete block characterized by having a hook receiving portion engaging portion, such as is hooked. 3. The hook receiving portion has a box-shaped hollow portion opened to the concrete block B, and an inner side wall of the box-shaped hollow portion with which the hook portion abuts spreads inward and is inclined. It is arrange | positioned, The connection structure of the concrete block of Claim 2 characterized by the above-mentioned. 4. The connection structure for concrete blocks according to claim 2, wherein the concrete block is a gutter. 5. The connection structure for concrete blocks according to claim 2, wherein the concrete block is a revetment block. 6. A method for manufacturing a concrete block having a concrete block connecting structure according to claim 2 or 3, wherein two surfaces of the mold surface are respectively formed in a mold for forming the concrete block A. While arranging the rectangular formwork with which one end side is abutted, the columnar support part having a coating layer formed on the other end side connected to the rectangular formwork is arranged, and ready-mixed concrete is placed in the formwork. A method for manufacturing a concrete block, which comprises casting and hardening.