JP2001295248A - Connecting tool and connecting method for concrete block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting tool for concrete blocks having a low manufacturing cost and capable of easily and reliably connecting concrete blocks. SOLUTION: Concrete blocks 1 are regularly installed at intervals on a repair surface 3, circular connecting metal fittings 2 are protruded on the peripheral edge of each concrete block 1, and the connecting metal fittings 2 of the concrete blocks 1 are connected by this connecting tool 10 for concrete blocks. The connecting tool 10 is provided with a connecting tool body 11, with both ends curved to form part of a spiral so that both ends are displaced from the same plane, a bolt insertion section 13 formed at one end of the connecting tool body 11 and bored with a bolt insertion hole 12 in the axial direction of the spiral, a female screw section 15 formed at the other end of the connecting tool body 11 and threaded with a female screw hole 14 in the axial direction of the spiral, and a bolt member 16 inserted from the bolt insertion hole 12 and screwed into the female screw hole 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for concrete blocks, and more particularly to a connector for connecting concrete blocks laid on a construction surface to protect a construction surface such as a riverbed or a slope.

[0002]

2. Description of the Related Art In some cases, floor protection works are carried out by laying concrete blocks on rivers, beaches, lake shores, and floors.

In such a case, as shown in FIG. 17, a large number of rectangular flat concrete blocks 1 are laid regularly on the floor to be constructed. At this time, in order to prevent lateral displacement of the concrete block 1, adjacent concrete blocks are connected to each other.

[0004] The concrete block 1 is provided with connecting fittings 2 formed of U-shaped reinforcing bars at four corners thereof so as to protrude. The joint 2 is formed so as to protrude so that its opening is perpendicular to the repair surface. In this example, these connecting fittings 2 are connected by a shackle-like connecting tool 110.

The size of the connecting member 110 is preferably smaller because the connecting member 110 must be connected in a limited small space between the concrete blocks 1. In addition, since the area of one construction section is large, the number of connecting points becomes enormous, so that the construction can be performed more easily and quickly, and the unit price is required to be low. Further, in order to effectively prevent the concrete block 1 from shifting, the connecting tool 110 needs to have a predetermined strength.

Conventionally, the connecting member 110 shown in FIGS. 14 to 16 is used. This connector 110
Is a so-called welding shackle, which is formed by bending a steel round bar 111 into a U-shape to form a connector main body 112, and forming annular portions 113 at both ends of the connector main body 112. The end 113a is fixed to the connector body 112 by welding. A bolt insertion hole 114 is formed in each of these annular portions 113.

[0007] A hexagonal bolt 115 is inserted between the two bolt insertion holes 114, and a hexagonal nut 116 is screwed into a threaded portion of the hexagonal bolt 115, thereby forming the connecting tool 110. In the drawing, reference numeral 117 denotes a washer.

[0008]

However, since the joints 2 protruding from the block are opened in the vertical direction, the openings of the four joints 2 are passed through one connector 110 in the horizontal direction. Further, it takes time and effort to insert a hexagon bolt 115 into the bolt insertion hole 114 of the connecting tool 110, screw a hexagon nut 116 into the tip of the hexagon bolt 115, and tighten the hexagon bolt 115 in a narrow space. There was a problem that construction efficiency was not good.

Further, the welding shackle used as the connecting tool 110 needs to be bent and welded for the production thereof, and there is a problem that the cost increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a concrete block connecting device which can be manufactured at low cost and can easily and surely connect concrete blocks.

[0011]

Means for solving the above problems in the present invention are as follows.

According to the first aspect of the present invention, there is provided a concrete block which is regularly arranged on a repair surface, and has an annular metal fitting protruding from a periphery thereof so that an opening thereof is perpendicular to the repair surface. A concrete block connecting device for connecting a connecting member, wherein the connecting member forms a part of a spiral so that both ends thereof are out of the same plane, and is curved and formed. And a bolt insertion portion having a bolt insertion hole formed in the axial direction of the spiral, and a female screw portion formed at the other end of the connector body, and a female screw hole screwed in the axial direction of the spiral. And a bolt member inserted from the bolt insertion hole and screwed into the female screw hole.

According to a second aspect of the present invention, the connector body according to the first aspect is formed by bending a round bar, and a flat bolt insertion portion and a flat female screw portion are formed at both ends thereof. It is a connector for a concrete block.

According to a third aspect of the present invention, the connector body of the first aspect is formed by punching a plate material and then bending the plate material, and has flat plate-shaped bolt insertion portions and flat plate-shaped female screw portions at both ends. Is a connecting tool for a concrete block formed with.

According to a fourth aspect of the present invention, there is provided a concrete block for connecting the metal fittings of a concrete block which is regularly laid at intervals on a repair surface and has an annular metal fitting formed protruding from a peripheral edge thereof. A connecting tool for a block, wherein the connecting tool includes two semi-annular arm members, a connecting tool body formed by connecting both arm members at one end thereof so as to be rotatable with each other, and one arm member. The other end of the other arm member is formed with a female screw portion at the other end of the other arm member, and the female screw portion is inserted through the bolt insertion hole and screwed into the female screw portion. It is a concrete block connecting tool provided with a bolt member. Here, the two arm members can be formed in two spiral configurations.

According to a fifth aspect of the present invention, there is provided the bolt insertion hole according to the first, second, third or fourth aspect,
A concrete block connector characterized by being a long hole.

According to a sixth aspect of the present invention, in the connecting tool body according to the first, second, third, fourth or fifth aspect, the radius of each of the four corners in the planar shape is changed to that of other parts. It is a connection tool for a concrete block formed into a substantially square shape smaller than the radius.

A seventh aspect of the present invention is a concrete block connecting method in which concrete blocks are connected using the concrete block connecting tool according to any one of the first to sixth aspects.

[Operation] According to the first aspect of the present invention, when a connecting member is mounted on a connecting member adjacent to a concrete block laid at a predetermined position, the connecting member is placed above the connecting member. First, insert the male screw part into one joint fitting, move it downward while rotating as it is, and then successively insert it into the next joint fixture, and insert the connector body into all the joint fittings. Good. At this time, the engaging portion main body forms a part of a spiral, and since both ends thereof are not on the same plane, all couplings can be performed without changing the planar position of the coupler by simply rotating the coupler. A connector can be inserted through the fitting. That is, the connecting portion can be inserted into all the connecting fittings without disposing the connecting tool between the concrete blocks.

Then, the bolt member may be inserted through the bolt insertion hole, the screw portion of the bolt member may be screwed into the female screw portion, and screwed until the bolt insertion portion and the female screw portion come into contact. At this time, the insertion direction of the bolt member is perpendicular to the laying surface of the concrete block, so that the screwing operation of the bolt member can be performed easily without being hindered by the concrete block. As described above, according to the concrete block connecting tool of the present invention, the concrete blocks can be connected easily and reliably.

According to the invention described in claim 2 of the present application,
The connecting tool body of the connecting tool is formed by bending a round bar, forming a bolt insertion portion and a female screw portion by forging at both ends thereof, and then forming a female screw hole in the female screw portion by simply tapping, which is troublesome. The welding process can be omitted, and the fitting can be manufactured at low cost with a small number of man-hours.

According to the invention described in claim 3 of the present application,
The connector body of the connector, and the bolt insertion portion, and the female screw portion can be formed by punching, and thereafter, the female screw portion can be formed by simply tapping the female screw hole. It is possible to manufacture a joint fitting inexpensively with man-hours.

According to the invention described in claim 4 of the present application,
Since the connecting tool is composed of two semi-annular arm members, when attaching the connecting tool to the adjacent connecting metal fitting of the concrete block laid in a predetermined position, the connecting tool is folded in two and arranged between the blocks. The semicircular arm member may be inserted into the fitting, the connecting tool may be formed into an annular shape, and the bolt inserting portion and the female screw portion may be overlapped so that the connecting tool is inserted into all the fittings.

Then, the bolt member may be inserted through the bolt insertion hole, the screw portion of the bolt member may be screwed into the female screw portion, and screwed until the bolt insertion portion and the female screw portion come into contact. At this time, the insertion direction of the bolt member is perpendicular to the laying surface of the concrete block, so that the screwing operation of the bolt member can be performed easily without being hindered by the concrete block. As described above, according to the concrete block connecting tool of the present invention, the concrete blocks can be connected easily and reliably. In this case, if the arm member forms a part of the spiral as a whole, the connecting tool can be more easily attached to the connecting fitting of the concrete block.

According to the invention described in claim 5 of the present invention,
Since the bolt insertion holes are elongated, the bolt members can be easily attached and tightened.

According to the invention described in claim 6 of the present invention,
Since the connecting member main body is formed in a substantially square shape in which the planar shape of the axis is smaller in radius at the four corners than the radius of the other portions, the connecting metal fittings are arranged at the four corners in a state of being inserted into the connecting metal fittings. As a result, the connector is stably arranged.

According to the invention described in claim 7 of the present invention,
Since the concrete block connecting method according to any one of claims 1 to 6 is used as the concrete block connecting method, it is possible to reduce the manufacturing cost of the connecting tool and easily and surely perform the construction. Can be.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a concrete block connecting tool and a connecting method according to the present invention will be described below.

First Embodiment FIGS. 1 to 5 show a first embodiment of a concrete block connecting tool according to the present invention.

In the present embodiment, the concrete block 1 is shown in FIG.
As shown in the figure, it is a concrete product formed in the shape of a square plate as in the conventional example, and a reinforcing bar is arranged inside,
U-shaped fittings are welded to the internal reinforcing bars and project from the four corners of the concrete block to form the joining fitting 2.

In this embodiment, a large number of concrete blocks 1 are regularly laid in a grid pattern at regular intervals on a plane to be repaired. Thereby, the four fittings 2 protruding from the four corners of the concrete block are brought into a close state. In other words, the four fittings are
They are arranged radially.

Then, the connecting member is attached to the connecting member so that the four connecting members pass therethrough, and the connecting member is tightened and fixed with a bolt member.

In this embodiment, the connecting member 10 is formed at one end of the connecting member main body 11 which is formed by forming a substantially spiral of which both ends are not on the same plane and which is curved. A bolt insertion portion 13 in which a bolt insertion hole 12 is formed in an axial direction of the spiral; and a female screw portion 15 formed in the other end of the coupling tool main body 11 and having a female screw hole 14 screwed in the axial direction of the spiral. And a bolt member 16 inserted from the bolt insertion hole 12 and screwed into the female screw hole 14.

The connector 10 according to the present embodiment includes a connector main body 11.
Is formed by bending a round bar, and both ends of the connector body 11 are forged into a flat plate shape to form the bolt insertion portion 13 and the female screw portion 15.

According to the connecting device 10 according to the present embodiment, when the connecting device 10 is mounted on the connecting member 2 adjacent to the concrete block 1 laid at a predetermined position, the connecting member 10 is arranged above the connecting member 2. First, the male screw part 15 is
The connector main body 11 is moved downward while being inserted into one of the coupling fittings 2 and rotated as it is, and is successively inserted into the adjacent coupling fittings 2 so that the coupling fitting main body 11 is inserted through all the coupling fittings 2. I just need.

According to the present embodiment, since the connecting member main body 11 forms a part of a spiral, all of the connecting members can be rotated only by rotating the connecting member 10 without changing the position of the connecting member 10 in the plane direction. 2, the connector 10 can be inserted. That is,
The connecting tool 10 can be inserted through all the connecting fittings 2 without disposing the connecting tool 10 in a small gap between the concrete blocks 1.

Then, the bolt member 16 is inserted into the bolt insertion hole 12 from above, and the screw portion 17 of the bolt member 16 is screwed into the female screw portion 15, so that the bolt insertion portion 13 and the female screw portion 15 come into contact as shown in FIG. Screw it in. At this time, since the insertion direction of the bolt member 16 is perpendicular to the laying surface of the concrete block 1,
The screwing operation of the bolt member 16 can be easily performed without being hindered by the concrete block 1, and the construction cost can be reduced.

Further, according to the connecting tool 10 of the present embodiment, the connecting tool body 11 of the connecting tool 10 is formed by bending a steel round bar, forging both ends thereof, and inserting the bolt insertion portion 13 and the female screw portion 15.
After that, the female screw hole 14 can be formed in the female screw portion 15 only by tapping, so that a time-consuming welding step can be omitted, and the coupling tool 10 can be manufactured at low cost with a small number of man-hours.

[Second Embodiment] FIGS. 6 to 9 show a second embodiment of a concrete block connecting tool according to the present invention.

The concrete block 1 of the present embodiment is also a concrete product formed in a square square shape like the first embodiment described above, in which a reinforcing bar is arranged inside and is welded to the inner reinforcing bar. The metal fittings project from the four corners of the concrete block to form the connecting metal fitting 2.

In this embodiment, the connecting member 20 is made of a steel plate and has a substantially annular connecting member main body 21 and bolt inserting portions 23 each having an elongated bolt insertion hole 22 formed at both ends of the connecting member main body 21.
And a female screw part 25 forming the female screw hole 24 is punched and formed, and the female screw hole 24 is formed by tapping, and thereafter, this member is bent to form the entire coupling tool 20 for approximately one round of a spiral. It is constituted as. The connecting member main body 21 is formed in a substantially square shape in which the radii of the four corners in the planar shape are smaller than the radii of the other parts.

In this embodiment, the method of attaching the connecting member 20 to the connecting member of the concrete block 1 is the same as that of the first embodiment, and the arrangement of the connecting member 20 and the screwing of the bolt member 26 can be easily performed. it can.

At this time, according to the present embodiment, the bolt insertion hole 2
2 is a long hole, so that the bolt member 26 can be easily attached when the bolt member 26 is attached, and even if the bolt insertion portion 23 and the female screw portion 25 are misaligned when the bolt member is tightened. The bolt member can be easily tightened.

Further, according to the present embodiment, since the connecting member 20 is formed in a substantially square shape in which the radii of the four corners are made smaller than the radii of the other parts, the connecting member 20 is inserted into the coupling fitting 2 and The coupling fittings 2 are arranged at these four corners, and the coupling fittings are stably arranged.

Further, according to the connecting tool 20 of the present embodiment, the connecting tool body 21, the bolt insertion portion 23, and the female screw portion 25 of the connecting tool can be formed by punching, so that a time-consuming welding process can be omitted. It is possible to manufacture the joint fitting inexpensively with a small number of man-hours.

[Third Embodiment] FIGS. 10 to 12 show a third embodiment of a concrete block connecting tool according to the present invention.

The concrete block 1 of this example is also a concrete product formed in a square square shape like the first embodiment described above, in which a reinforcing bar is arranged inside and is welded to the internal reinforcing bar. The metal fittings project from the four corners of the concrete block to form the connecting metal fitting 2.

In this embodiment, as shown in FIG. 10, the connecting member 50 has two semi-annular arm members 51 and 52, and both arm members 51 and 52 are rotatably connected to each other at one end by rivets 53. A connecting member main body 54 formed by
A bolt insertion portion 56 having a bolt insertion hole 55 formed at the other end of one arm member 51; a female screw portion 58 having a female screw hole 57 formed at the other end of the other arm member 52; And a bolt member 59 inserted from above 55 and screwed into the female screw hole 57.

In this embodiment, since the connecting member 50 is composed of the two arm members 51 and 52 obtained by stamping a steel plate, the connecting member is attached to the adjacent connecting member of the concrete block 1 laid at a predetermined position. At the time,
As shown by the imaginary line in FIG. 2, the connecting member 50 is folded in two and disposed between the blocks, the respective arm members 51 and 52 are inserted into the connecting metal member 2, and the connecting member 50 is formed into an annular shape, and the bolt insertion portion 56 is formed. The connecting tool 50 may be inserted into all the fittings 2 so that the connecting tool 50 and the female screw portion 58 are overlapped.

Then, the bolt member 59 is inserted into the bolt insertion hole 5.
5 and the screw portion of the bolt member 59 may be screwed into the female screw hole 57. At this time, the insertion direction of the bolt member is perpendicular to the laying surface of the concrete block, so that the screwing operation of the bolt member can be performed easily without being hindered by the concrete block. in this way,
According to the concrete block connector of the present invention,
Concrete blocks can be easily and reliably connected.

At this time, if the bolt insertion hole 55 is formed as a long hole, the bolt member 59 is attached when the bolt member 59 is mounted.
Can be easily attached, and even if the bolt insertion portion 56 and the female screw portion 58 are misaligned when the bolt member 59 is tightened, the bolt member 59 can be easily tightened.

Further, according to the connector 50 according to the present embodiment, the arm members 51 and 52 of the connector 50 and the bolt insertion portion 5
6, and the female screw portion 58 can be formed by punching, so that a laborious welding process can be omitted, and a fitting can be manufactured inexpensively with a small number of man-hours.

Further, as shown in FIG.
If the first and the second 52 form a part of a spiral as a whole, the connecting element can be more easily attached to the joint of the concrete block.

[0054]

As described above, according to the concrete block connecting tool of the present invention, there is an effect that the manufacturing cost is low and the concrete blocks can be connected easily and securely.

In other words, according to the first aspect of the present invention, when attaching a connecting member to a connecting member adjacent to a concrete block laid at a predetermined position, the connecting member is arranged above the connecting member. Then, first, the male screw portion is inserted into one of the fittings, moved downward while rotating as it is, and is inserted one after another into the adjacent fittings, so that the connecting body can be inserted into all the fittings. . At this time, the engaging portion main body forms a part of a spiral, and since both ends thereof are not on the same plane, all couplings can be performed without changing the planar position of the coupler by simply rotating the coupler. A connector can be inserted through the fitting. That is, there is an effect that the connecting portion can be inserted into all the connecting metal members without disposing the connecting member between the concrete blocks.

Then, the bolt member may be inserted into the bolt insertion hole, the screw portion of the bolt member may be screwed into the female screw portion, and screwed until the bolt insertion portion and the female screw portion come into contact. At this time, the insertion direction of the bolt member is perpendicular to the laying surface of the concrete block, so that the screwing operation of the bolt member can be performed easily without being hindered by the concrete block. Thus, according to the concrete block connecting tool of the present invention, there is an effect that the concrete blocks can be easily and reliably connected.

According to the invention described in claim 2 of the present application,
The connecting tool body of the connecting tool is formed by bending a round bar, forming a bolt insertion portion and a female screw portion by forging at both ends thereof, and then forming a female screw hole in the female screw portion by simply tapping, which is troublesome. It is possible to omit the welding process, and to produce an inexpensive joint fitting with a small number of man-hours.

According to the invention described in claim 3 of the present application,
The connector body of the connector, and the bolt insertion portion, and the female screw portion can be formed by punching, and thereafter, the female screw portion can be formed by simply tapping the female screw hole. This has the effect that the joining fitting can be manufactured inexpensively with man-hours.

According to the invention described in claim 4 of the present application,
Since the connecting member is composed of two semi-annular members, when attaching the connecting member to the adjacent connecting member of the concrete block laid at a predetermined position, the connecting member is folded into two parts and arranged between the blocks. The annular member may be inserted into the fittings, the connecting tool may be formed into an annular shape, and the bolt inserting portion and the female screw portion may be overlapped so that the connecting tools are inserted into all the fittings. Then, the bolt member may be inserted through the bolt insertion hole, the screw portion of the bolt member may be screwed into the female screw portion, and screwed until the bolt insertion portion and the female screw portion come into contact. At this time, the insertion direction of the bolt member is
Since the direction is perpendicular to the laying surface of the concrete block, the screwing operation of the bolt member can be performed easily without being hindered by the concrete block. Thus, according to the concrete block connecting tool of the present invention, there is an effect that the concrete blocks can be easily and reliably connected.

According to the fifth aspect of the present invention,
Since the bolt insertion holes are elongated, there is an effect that the bolt member can be easily attached and tightened.

According to the invention described in claim 6 of the present invention,
Since the connecting member main body is formed in a substantially square shape in which the planar shape of the shaft has four corners whose radii are smaller than the radii of the other parts, the connecting fittings are inserted into the four corners in a state where they are inserted into the connecting fittings. Thus, there is an effect that the connecting tool is stably arranged.

According to the invention described in claim 7 of the present invention,
Since the concrete block connecting method according to any one of claims 1 to 6 is used as the concrete block connecting method, it is possible to reduce the manufacturing cost of the connecting tool and easily and surely perform the construction. This has the effect that it can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a concrete block connecting tool together with a concrete block according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the connecting tool shown in FIG. 1 together with a fitting for a concrete block.

FIG. 3 is a front view of the coupler shown in FIG. 1;

FIG. 4 is a plan view of the coupler shown in FIG. 1;

FIG. 5 is a front view showing a bolt member tightened state of the coupling tool shown in FIG. 1;

FIG. 6 is a plan view of a coupler according to a second embodiment of the present invention.

FIG. 7 is a front view of the coupler shown in FIG. 6;

FIG. 8 is a plan view showing the connection tool shown in FIG. 6 together with a connection fitting of a concrete block.

FIG. 9 is a front view showing a bolt member tightened state of the coupling tool shown in FIG. 6;

FIG. 10 is a plan view of a coupler according to a third embodiment of the present invention.

FIG. 11 is a front view of the coupler shown in FIG. 10;

FIG. 12 is a plan view showing the connection tool shown in FIG. 10 together with a connection fitting of a concrete block.

FIG. 13 is a front view of a connector according to another example of the third embodiment of the present invention.

FIG. 14 is a plan view showing a bolt member tightened state of a conventional connector.

FIG. 15 is a front view of the conventional coupler shown in FIG.

FIG. 16 is a plan view showing the conventional connection tool shown in FIG. 14 together with a connection fitting for a concrete block.

FIG. 17 is a perspective view showing the conventional connector shown in FIG. 14 together with a concrete block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete block 2 Connecting metal fitting 3 Repair surface 10 Connecting tool 11 Connecting tool main body 12 Bolt insertion hole 13 Bolt inserting section 14 Female screw hole 15 Female screw section 16 Bolt member 20 Connecting tool 21 Connecting tool main body 22 Bolt inserting hole 23 Bolt inserting section 24 Female screw Hole 25 Female thread part 26 Bolt member 50 Connector 51 Arm member 52 Arm member 53 Rivet 54 Connector body 55 Bolt insertion hole 56 Bolt insertion part 57 Female screw hole 58 Female screw part 59 Bolt member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F16B 5/00 E04C 1/10 J F term (Reference) 2D018 EA01 2D044 DB52 3J001 FA03 GA07 GB01 HA03 HA04 KB04

Claims (7)

[Claims] 1. A concrete block for connecting a concrete block of a concrete block which is regularly arranged on a repair surface and has an annular connecting member protruding so that an opening thereof is perpendicular to the repair surface at a peripheral edge. A connector body formed by forming a part of a spiral so that both ends thereof deviate from the same plane, and a curved body; a bolt formed at one end of the connector body; A bolt insertion portion having an insertion hole formed in the axial direction of the spiral, a female screw portion formed at the other end of the connector body, and a female screw hole screwed in the axial direction of the spiral; and A bolt member to be inserted and screwed into the female screw hole; 2. The concrete block connecting tool according to claim 1, wherein the connecting tool body is formed by bending a round bar, and a flat bolt insertion portion and a flat female screw portion are formed at both ends thereof. 3. The concrete block according to claim 1, wherein said connecting member main body is formed by punching a plate material and then bending the plate material, and a flat bolt insertion portion and a flat female screw portion are formed at both ends thereof. Connector. 4. A concrete block connecting member for connecting said connecting members of a concrete block which is regularly laid at intervals on a repair surface and has an annular connecting member protrudingly formed on a peripheral edge thereof. The connector includes two semi-annular arm members, a connector body formed by connecting both arm members rotatably at one end thereof, and a bolt formed at the other end of one arm member. Concrete comprising: a bolt insertion portion having an insertion hole formed therein; a female screw portion having a female screw portion formed at the other end of the other arm member; and a bolt member inserted from the bolt insertion hole and screwed into the female screw portion. Block connector. 5. The concrete block connecting tool according to claim 1, wherein the bolt insertion hole is an elongated hole. 6. The connecting tool body according to claim 1, wherein the connecting tool body is formed in a substantially quadrangular shape in which the radii of the four corners are smaller than the radii of the other parts in a planar shape. The connector for a concrete block according to claim 5. 7. A concrete block connecting method in which concrete blocks are connected using the concrete block connecting tool according to any one of claims 1 to 6.