JPH0921168A - Drawing up connecting device of concrete block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to draw up and connect mutually concrete blocks easily and at low cost. SOLUTION: Blocks 3 are drawn up and connected with a connector. An insert 10 is buried in the surface of the blocks on the connection side. The connector is provided with a fastening bolt 11, a connection member 12 which ties mutual blocks and a pair of operation members 13, which are placed on both end areas of the connection member. The bolt 11 is inserted into a long hole 21 of the connection member and an insertion hole 26 of the operation member and screwed in with the insert 10. In an initial period of drawing up, a slope surface 20 of the connection member and a slope surface 23 of the operation member are partially placed one upon the other. When the bolt 11 is further fastened in this state, the slope surface 20 of the connection member moves slidingly toward the base end of the slope surface 32 while pressing the slope surface 32 of the operation member inwardly. Therefore, the bolt 11 moves the long hole 21 relatively toward the inner end while less resistant blocks draw up the other blocks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block such as a box culvert, a U-shaped groove, an L-shaped retaining wall block or the like, which is installed on a foundation, and then the installation blocks are drawn close to each other to closely connect them. The present invention relates to a coupling device.

[0002]

2. Description of the Related Art When a box culvert, a U-shaped groove, or an L-shaped retaining wall block is used to construct an underdrain, an open channel, or a retaining wall, it is necessary to draw the blocks into close contact with each other.

However, during construction, it is difficult to install the blocks at predetermined positions so that the blocks are closely butted to each other. Especially, when the blocks are heavy products, such accurate positioning is required. Installation is more difficult.

Therefore, a method has been adopted in which such blocks are provisionally installed in a substantially butted state, and thereafter, the blocks are drawn together by using a tightening tool to be closely connected to each other. As this kind of connecting means, for example, FIG.
As shown in FIG. 3, the angle members b, b are fixed (fixed with the insert c and the bolt d) at the required positions of the ends of the blocks a, a to be connected on the connection side. It has been practiced to insert the connecting bolt g into the bolt holes f and f provided in the upright pieces e and e of b and to tighten them with the nut h so that both blocks a and a are drawn close to each other and closely contacted with each other.

However, since this connecting means takes the means of tightening the nut h to the connecting bolt g,
There were the following problems. Vertical pieces e, e of angle members that support the connecting bolt g
Has a large amount of protrusion on the surfaces of the blocks a, a, so that after the connection is completed, this protrusion poses a danger or an obstacle to other objects.

The tightening amount of the nut h is the block a,
Since the pulling amount is a, the threaded portion i of the connecting bolt g must be set to be relatively long. Therefore, when the tightening is completed, the threaded portion i is removed from one standing piece as shown in FIG. There was a possibility that it would protrude greatly toward one side, which could be an obstacle to other things or cause a danger.

A connecting bolt g is attached to the vertical piece e of the angle member.
Therefore, it is necessary that the protruding amount of the standing piece is relatively large in order to pass through, and the standing pieces e, e are pushed as shown by the one-dot chain line in FIG. 17 as the blocks a, a are pulled. Since a bending force acts, it is necessary to prepare an angle member having strength so that the standing piece e does not bend when the nut is tightened, which causes a problem of high cost.

In order to solve the problems of the prior art, for example, Japanese Utility Model Laid-Open No. 4-65877 proposes the following pulling connection device.

As shown in FIGS. 19 to 20, this apparatus uses a connecting plate k having elongated holes j, j which are long along the axis at both end portions, and a bolt m for inserting the elongated hole j into
It is screwed into an insert n embedded in the end portion of the block a on the connection side, and the surface side of the elongated hole j is inclined from the inner end side p thereof toward the outer end side q toward the plate surface side. It is a surface r. In addition, the peripheral portion of the oblong hole on the front surface side has an oval shape with a smaller diameter on the outer end side, and is provided with a taper s that becomes deeper toward the back surface side. Meanwhile, the bolt m
Is provided with a conical head t that acts on the inclined surface r. However, when the bolt m is tightened, the conical head portion t of the bolt acts on the inclined surface r of the connecting plate, whereby the connecting plate k is moved outward in the longitudinal direction of the slot j (FIG. 20). In this structure, the blocks are moved toward each other in the direction of arrow F), and as a result, the blocks are attracted to each other and closely connected.

[0010]

This pulling connection means has an advantage of solving the above-mentioned problems (1) to (3) in the connecting device using the bolt g shown in FIG. 17, but has raised the following new problems. .

In order to be able to move the connecting plate largely by tightening a single bolt having a conical surface, the elongated hole of the connecting plate must be formed in the special structure as described above. Therefore, it was expensive to manufacture the connecting plate.

The conical head of the bolt, which serves as a reference for the moving amount of the connecting plate (that is, the pulling amount of the block), does not exist in a normal bolt, and therefore a special bolt must be prepared, which causes a high cost.

Since the diameter of the conical head portion of the bolt, which is the reference for the movement amount of the connecting plate, cannot naturally exceed the original size of the bolt head portion, there is a limit to the movement amount of the plate and a large movement amount. I had to prepare a special bolt with an abnormally large head in order to create a quantity.

In the connected state of the blocks, the bolt presses the peripheral portion of the elongated hole by locally abutting the conical surface thereof. Therefore, sufficient tightening surface pressure does not act, and the bolt is likely to loosen.

The present invention has been developed in view of the above problems, and a concrete block which can be drawn and connected without using a specially shaped bolt and with a simple structure. It is intended to provide a pulling connection device.

[0016]

In order to solve the above problems, the present invention employs the following means. That is, the concrete block pulling and connecting device according to the present invention (hereinafter referred to as pulling and connecting device) is a concrete block pulling and connecting device that draws and connects concrete blocks to each other using a connecting tool. An insert is embedded in the block surface. The connecting member is composed of a tightening bolt screwed into the insert, a connecting member connecting the concrete blocks to each other, and a pair of actuating members arranged so as to overlap with both end portions of the connecting member. There is. And the connecting member is
Elongated holes that can be inserted with the tightening bolts and have a length that can correspond to the stroke required for pulling the concrete block are provided at both end portions of the member, and on the rear surface of the member facing the block surface portion. The member has an inclined surface which is located on the inner side of the member with respect to the elongated hole and inclines toward the surface side from the outer end to the inner end. The actuating member has an insertion hole through which the tightening bolt can be inserted, and is fixed to a fixing piece disposed between the end portion of the connecting member and the insert, and substantially the inclined surface of the connecting member. It is characterized in that an inclined surface having the same inclination angle and capable of contacting the inclined surface is provided.

A more preferred embodiment of the pulling and connecting device according to the present invention is a pulling and connecting device for concrete blocks which draws and connects concrete blocks to each other by using a connecting tool. A recess is formed in the block surface, and the inner wall surface on the pulling direction side is an inclined support surface that is inclined from the base end toward the tip toward the block end, and the insert is embedded in the bottom of the recess. Has been done. The connecting member is composed of a tightening bolt screwed into the insert, a connecting member connecting the concrete blocks to each other, and a pair of actuating members arranged so as to overlap with both end portions of the connecting member. There is. The connecting member is provided with long holes at both end sides, through which the tightening bolts can be inserted, and long holes having a length corresponding to a stroke required for pulling the concrete block. On the opposite back surface side, there is an inclined surface which is located on the inner side of the member with respect to the elongated hole and inclines toward the front surface from the outer end toward the inner end. Also, the actuating member is folded into a fixing piece which is in contact with the bottom surface of the recess and is arranged between the end portion of the connecting member and the insert and which has an insertion hole through which the tightening bolt can be inserted. The bent pieces are connected in series, and the back surface of the bent pieces is formed as an inclined surface that can contact the inclined support surface of the recess, and the surface thereof is substantially the same as the inclined surface of the connecting member. It is characterized in that it is formed on an inclined surface having an inclination angle and capable of contacting the inclined surface.

Another aspect of the pulling and connecting device according to the present invention is a concrete block pulling and connecting device which draws and connects concrete blocks to each other by using a connecting tool, and is provided on a required block surface on the connecting side of both blocks. The insert is buried. The connecting member is composed of a tightening bolt screwed into the insert, a connecting member connecting the concrete blocks to each other, and a pair of actuating members arranged so as to overlap with both end portions of the connecting member. There is. The connecting member is provided with long holes at both end portions of the member, through which the tightening bolts can be inserted, and long holes having a length corresponding to a stroke required for pulling the concrete block are provided. On the side, there is an inclined surface that is located on the outer side of the member with respect to the elongated hole and that is inclined toward the back surface of the member from the outer end to the inner end. The actuating member has an insertion hole through which the tightening bolt can be inserted, and is fixed to a fixed piece arranged in contact with the surface side of the end portion of the connecting member, and is substantially the same as the inclined surface of the connecting member. Is provided with an inclined surface which has the same inclination angle and can come into contact with the inclined surface.

In each of the pulling and connecting devices described above, the connecting member and the actuating member are simply formed by, for example, bending one plate-shaped body or shaving it from one plate-shaped body. .

In the present invention, concrete blocks refer to various concrete blocks such as box culverts, U-shaped grooves or L-shaped retaining wall blocks.

However, according to the present invention, after a certain concrete block is placed on the foundation so that another concrete block to be connected thereto is in a substantially close state, the concrete block is operated between the insert and the connecting plate. The member is interposed, and the inclined surface of the connecting plate and the inclined surface of the operating member are partially overlapped at that time, and the tightening bolt for inserting the elongated hole of the connecting plate and the insertion hole of the operating member into the insert. When they are screwed together and tightened, the inclined surface of the connecting plate slides on the inclined surface of the actuating member from its distal end side toward its proximal end side, and as a result, both concrete blocks are drawn close to each other and closely contact each other. Will be bolted to.

Contrary to the above, the connecting plate is interposed between the insert of the concrete block to be connected and the operating member, in which case the inclined surface of the connecting plate partially overlaps the inclined surface of the operating member. When the tightening bolt is inserted into the insertion hole of the actuating member and the elongated hole of the connecting plate and is fastened to the insert, the inclined surface of the actuating member causes the inclined surface of the connecting plate to move toward the tip side. Slides toward the base end side, and as a result, both concrete blocks are attracted to each other and tightly bolted together.

In particular, when a recess is provided in the block surface of a concrete block and the actuating member is placed in the recess with the back surface of the bent piece abutting against the inclined support surface of the recess, the tightening bolt is used. The inclined support surface can bear the pressing force acting on the bent piece generated by the tightening. Therefore, even if the actuating member has a relatively thin wall, its deformation can be avoided.

The pulling movement amount of the concrete block due to the tightening of the tightening bolts is set by appropriately setting the lengths of the inclined surface of the connecting member and the inclined surface of the actuating member in the inclination direction, and accordingly, the long holes of the connecting member. It can be set to a desired one by changing the length of.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. 1st Embodiment In FIGS. 1-4, the pulling connection device 1 which concerns on this invention is
By using the connecting tool 2, for example, the concrete blocks 3 and 3 as U-shaped grooves are pulled together to be connected.
A rectangular recess 5 is formed on the block side surface on the connection side of the concrete block 3, and the inner wall surface on the pulling direction (block end direction) side is a block extending from the base end 6 to the tip 7. The inclined support surface 8 is inclined at about 45 degrees toward the end, and the insert 10 is embedded in the center of the bottom surface 9 of the recess 5.

The connecting tool 2 includes a tightening bolt 11 of a normal construction screwed into the insert 10, a connecting member 12 for connecting concrete blocks, and the recessed portion so as to overlap with both end portions of the connecting member. It is composed of a pair of actuating members 13, 13 housed in the place 5.

In the present embodiment, the connecting member 12 is formed by bending a single rectangular plate-shaped steel plate, and the central portion thereof is bent so as to have a trapezoidal shape in plan view. It has been tuned. Horizontal sides 17, 17 parallel to the apex 16 of the trapezoidal bent portion 15 are provided so as to project outward. The back surface of the inclined piece portion 19 of the trapezoidal bent portion is formed as an inclined surface 20 of about 45 degrees which is equal to the inclination of the inclined support surface 8 of the recess 5. The length of the inclined surface 20 in the inclination direction is set to be substantially equal to the length of the inclined support surface 8 in the inclination direction. The horizontal side portions 17 and 17 are provided with long holes 21 having a length corresponding to the stroke required for drawing the concrete blocks 3 and 3 together.

Further, the actuating member 13 can abut on the inclined support surface 8 on the back surface 23 of the fixing piece 22 which can abut the bottom surface portion 9 of the recess 5, and in the inclination direction of the inclined support surface 8. A bent member of a steel plate formed by bending an inclined piece 25 having a length substantially equal to the length, and the fixed piece 22 includes:
An insertion hole 26 through which the tightening bolt 11 can be inserted is provided. In FIG. 1, reference numeral 27 is a washer that is fitted to the tightening bolt 11.

The procedure for connecting the concrete blocks to each other using the connecting device will be described below with reference to FIGS. First, with respect to a certain concrete block, another concrete block to be connected thereto is installed on the foundation in a substantially close state. At that time, the elastic water blocking material 30 is attached to the connecting surface of one concrete block.

Thereafter, in the recesses 5 and 5, the operating members 13 and 13 are formed.
The inclined piece 25 is brought into contact with the inclined support surface 8 and the fixing piece 22 is brought into contact with the bottom surface portion 9 of the recess. This allows
The insertion hole 26 of the fixed piece coincides with the screw hole 31 of the insert. After that, the trapezoidal bent portion 15 of the connecting member 12 is directed to the block side, and the horizontal side portion 17 is made to face the fixed piece 22 of the operating member. 2, the proximal end portion 20a of the inclined surface 20 of the connecting member and the inclined surface (the surface of the inclined piece) 32 of the actuating member are brought into contact with each other as shown in FIG.
The leading end side portion 32a of the above is overlapped, and the long hole 21 of the horizontal side and the insertion hole 26 of the fixed piece are aligned.

After this, the long hole 21 and the insertion hole 26 are inserted.
When the tightening bolt 11 for inserting the screw is screwed into the screw hole 31 of the insert 10 and the left and right tightening bolts 11, 11 are tightened at the same time or by substantially the same amount on the left and right, the inclined surface 20 of the connecting member causes the operating member to move. While pressing the inclined surface 32 inwardly, the inclined surface 20 slides toward the base end side of the inclined surface 32.

As a result, the tightening bolt relatively moves the elongated hole toward the inner end side thereof, and the concrete block having the smaller resistance is pulled toward the concrete block. Usually, the existing concrete block is already fixed to another existing concrete block, so that it does not move, and the newly installed concrete block is attracted. 3 to 4 show a state where the concrete blocks 3 and 3 are attracted to each other and are closely connected to each other, and the elastic water blocking material 30 is in a compressed state.

At this time, since the inclined piece 32 of the operating member is supported in contact with the inclined support surface 8 of the recess, the pressing force acting on the inclined piece 25 generated by tightening the tightening bolts is The inclined support surface 8 can be used for this purpose. Therefore, even if the actuating member has a relatively thin wall, its deformation can be avoided. Further, since the position of the fixing piece is fixed, there is no fear that the inner peripheral surface of the insertion hole of the actuating member strongly presses the peripheral surface portion of the tightening bolt to exert a shearing action or a bending action on the tightening bolt. .

Incidentally, if the inclined piece 25 is omitted,
The inclined surface 20 comes into contact with the inclined supporting surface 8 of the recess made of a concrete surface, but since the concrete surface has a lower hardness than steel, friction between the inclined surface and the inclined supporting surface becomes excessive. It does not slide smoothly, thus making it difficult to pull the block.

Second Embodiment FIGS. 5 to 8 show another embodiment of the pulling connection device according to the present invention. As in the case of the first embodiment, the actuating members 13, 13 are interposed between the insert 10 and the portions on both end sides of the connecting member 12, but in the present embodiment, the insert 10 is recessed as described above. Instead of being buried in the bottom surface of the block, it is in contact with the flat block surface 33.

The connecting member 12 is not formed by bending a steel plate as in the first embodiment, but is formed by cutting a steel plate out of a plate-shaped material. More specifically, the central portion of the rear surface of the member facing the block surface portion 33 is provided with inclined surfaces 37, 37 inclined from the outer end 35 toward the inner end 36 by about 45 degrees toward the front surface. The members are cut out in a trapezoidal shape, and long holes 39 having a length corresponding to a stroke required for drawing the concrete blocks to each other are bored in both end portions of the member.

Similarly, the actuating member 13 is also formed by cutting out a plate-shaped material, and a fixed piece 41 having an insertion hole 40 through which the tightening bolt 11 can be inserted is attached to an inclined surface of the connecting member 12. The inclined surface 3 having the same inclination angle as 37
An inclined surface 42 that can abut against 7 is provided.

However, the procedure for connecting the concrete blocks to each other using the pulling connection device is as follows. That is, after the concrete blocks 3 and 3 to be connected are installed on the foundation in a state of being substantially close to each other,
The actuating member 13 is interposed between the end portion of the connecting member 12 and the insert 10. As shown in FIG. 6, the inclined surface 37 of the connecting member is brought into contact with the slanted surface 37 of the connecting member according to the approximate block state.
With the tip side portion 37a of the operation member in contact with the tip side portion 42a of the inclined surface 42 of the actuating member, the tightening bolt 11 inserted through the elongated hole 39 and the insertion hole 40 of the fixing piece is screwed into the screw hole 31 of the insert 10. It is put together.

When the tightening bolt 11 is tightened in this state, the inclined surface 37 of the connecting member is changed to the inclined surface 42 of the operating member.
While pressing inward, the inclined surface 37 slides toward the base end side of the inclined surface 42. At that time, the tightening bolt 11 relatively moves the elongated hole 39 toward the inner end side thereof. As a result, the concrete block with less movement resistance is attracted. 7 to 8 show a state where the concrete blocks 3 and 3 are attracted to each other and are closely connected, and the elastic water blocking material 30 is in a compressed state. FIG. 5
Reference numeral 43 denotes a washer through which the tightening bolt is inserted.

Third Embodiment FIGS. 9 to 12 show another embodiment of the pulling connection device according to the present invention, in which the insert 10 is flat on the connection side as in the second embodiment. Block surface part 3
3 abuts. The difference from each of the above-described embodiments is that the connecting member 12 is interposed between the insert 10 and the operating member 13.

The connecting member 12 is inclined at an angle of about 45 degrees so that both end portions of a plate-shaped material having a horizontally long rectangular plate shape are inclined from the inner end 45 toward the outer end 46. It is bent to form inclined pieces 47, 47, and inclined surfaces 49, 49 are provided on the surface side thereof. Further, a long hole 50 which is long in the length direction of the connecting member and which has a length corresponding to the stroke required for pulling the concrete block is formed near the inner end 45 of the inclined surface 49. .

The operating member 13 has an insertion hole 51 through which the tightening bolt 11 can be inserted, and the connecting member 1 is provided.
Fixing piece 52 that is brought into contact with the surface side of the end portion of 2
At the outer end of the inclined member, the inclined member 53 is bent at the same angle as that of the inclined member 47 of the connecting member.
5 can contact the inclined surface 49 on the side of the connecting member, and both inclined surfaces 55, 49 have the same length in the inclination direction.

The procedure for pulling and connecting the concrete blocks 3 and 3 with each other by using such an apparatus will be described below with reference to FIGS. That is, after the concrete blocks 3 and 3 to be connected are installed on the foundation in a state of being substantially close to each other, the insert 10 and the operating member 1
The portion on the base end side of the connecting member 12 is interposed between the base member 3 and the base member 3.
FIG. 10 obtained by the schematic block installation state
In the state where the tip end side portion 49a of the inclined surface 49 of the coupling member is in contact with the tip end side portion 55a of the inclined surface 55 of the actuating member shown in FIG. Is screwed onto the insert 10.

When the tightening bolt 11 is tightened in this state, the inclined surface 49 of the connecting member is changed to the inclined surface 55 of the operating member.
While pushing inward, the inclined surface 55 slides toward the base end side of the inclined surface 49. As a result, the tightening bolt 1
1 relatively moves the long hole 50 toward the inner end side, and as a result, similarly to the above, the concrete block on the side with less movement resistance is pulled.

Fourth Embodiment FIGS. 13 to 16 show another embodiment of the pulling connection device according to the present invention. The difference from the second embodiment is that the connecting member 12 is inclined. The point is that the plate-shaped material of the steel plate is partially shaved to form the surface 49 and the inclined surface 55 of the actuating member 13. Since the procedure for connecting the concrete blocks to each other by using the device having such a configuration is the same as that in the third embodiment, the duplicated description will be omitted here. 13 to 16, the same parts as those in the third embodiment are designated by the same reference numerals.

[0046]

The present invention has the following excellent effects. According to the present invention, a normal tightening bolt and a connecting member having an inclined surface with a simple structure and a simple long hole are similarly used without using a bolt or a connecting plate having a special structure as in the conventional case. Since the concrete blocks can be sufficiently attracted and connected to each other by using the actuating member having the simple inclined surface and the simple insertion hole, the entire apparatus can be constructed at a lower cost than the conventional one. There are advantages.

Also, it is easy to set the lengths of the inclined surface of the connecting member and the inclined surface of the actuating member to appropriate ones (there is no structural restriction like the bolts of the prior art having a special conical head).
Therefore, even if the amount of pulling of the concrete block (that is, the interval when the concrete block is installed) is somewhat long, the pulling can be reliably performed. As a result, the initial installation state of the concrete block may be rough,
There is an advantage that workability is improved.

In particular, when the concavity having the inclined support surface is provided on the block surface portion on the connection side of the concrete block, the pressing force due to the tightening of the tightening bolt is applied to the inclined support surface of the recess via the inclined piece of the operating member. Therefore, the pressing force acting on the bent piece generated by tightening the tightening bolt can be received by the inclined support surface. Therefore, even if the actuating member has a relatively thin wall, its deformation can be avoided. Further, since the position of the fixing piece is fixed, there is no fear that the fixing piece exerts shearing action or bending action on the tightening bolt.

Further, by providing the block surface with a recess, when the tightening of the tightening bolt is completed, the end portions of the actuating member and the connecting member are hidden in this recess. Therefore, there is an advantage in that the appearance is neat and the amount of protrusion of the concrete block to the surface side can be minimized, and collision and danger with other objects can be avoided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view illustrating a pulling connection device.

FIG. 2 is a cross-sectional view illustrating an initial stage of drawing a block using the block.

FIG. 3 is a cross-sectional view showing a state in which blocks are pulled together and connected.

FIG. 4 is a perspective view thereof.

FIG. 5 is an exploded perspective view illustrating another aspect of the pulling connection device.

FIG. 6 is a cross-sectional view illustrating an initial stage of drawing a block using the block.

FIG. 7 is a cross-sectional view showing a state in which blocks are pulled together and connected.

FIG. 8 is a perspective view thereof.

FIG. 9 is an exploded perspective view illustrating another aspect of the pulling connection device.

FIG. 10 is a cross-sectional view illustrating an initial stage of block drawing using the block.

FIG. 11 is a cross-sectional view showing a state in which blocks are pulled together and connected.

FIG. 12 is a perspective view thereof.

FIG. 13 is an exploded perspective view illustrating another aspect of the pulling connection device.

FIG. 14 is a cross-sectional view illustrating an initial stage of drawing a block using the block.

FIG. 15 is a cross-sectional view showing a state in which blocks are pulled together and connected.

FIG. 16 is a perspective view of the same.

FIG. 17 is a cross-sectional view illustrating a conventional block pulling connection device.

FIG. 18 is a cross-sectional view for explaining a pulling connection state of the block.

FIG. 19 is an exploded perspective view illustrating another aspect of the conventional block pulling connection device.

FIG. 20 is a cross-sectional view illustrating an initial stage of pulling blocks according to the above.

FIG. 21 is a cross-sectional view illustrating a pulling connection state of the blocks thereby.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pulling connection device 2 Connection tool 3 Concrete block 5 Recess 8 Sloping support surface 9 Bottom part of recess 10 Insert 11 Fastening bolt 12 Connection tool 13 Actuating member 20 Sloping surface 21 Long hole 22 Fixing piece 25 Sloping piece 26 Insertion hole 32 inclined surface 33 block surface portion 37 inclined surface 39 long hole 42 inclined surface 47 inclined piece 49 inclined surface 50 elongated hole 51 insertion hole 52 fixed piece 53 inclined piece 55 inclined surface

Claims (5)

[Claims] 1. A pulling and connecting device for concrete blocks, which draws and connects concrete blocks to each other by using a connecting tool, wherein inserts are embedded in block surface portions on the connecting side of both concrete blocks, and the connecting tool is The tightening bolt screwed to the insert, a connecting member that connects the concrete blocks to each other, and a pair of operating members that are arranged so as to overlap the end portions of the connecting member are provided. , The back side of the member facing the block surface portion is provided with long holes having a length capable of inserting the tightening bolt and having a length corresponding to a stroke necessary for pulling the concrete block, respectively. Has an inclined surface which is located on the inner side of the member with respect to the elongated hole and inclines toward the surface side from the outer end to the inner end. The actuating member has an insertion hole through which the tightening bolt can be inserted, and is fixed to a fixing piece arranged between an end portion of the connecting member and the insert, and the inclined surface of the connecting member is substantially formed. And a connecting device for a concrete block, characterized in that the inclined surfaces having the same inclination angle so as to come into contact with the inclined surfaces are provided. 2. A concrete block pulling and connecting device for pulling and connecting concrete blocks to each other by using a connecting tool, wherein each of the concrete blocks has a recess formed in a block surface portion on the connecting side. The inner wall surface on the direction side is an inclined support surface that is inclined in the block end direction from the base end toward the tip, and an insert is embedded in the bottom surface of the recess, and the connector is the insert. And a pair of actuating members arranged so as to overlap with both end portions of the connecting member, and the connecting member includes: Slots at both ends are provided with long holes through which tightening bolts can be inserted and which can handle the stroke required to pull the concrete block. Also, on the back surface side facing the block surface, it has an inclined surface which is located on the inner side of the member than the elongated hole and inclines toward the front side from the outer end to the inner end, Further, the actuating member is folded into a fixing piece which is in contact with the bottom surface of the recess and is arranged between the end portion of the connecting member and the insert and which has an insertion hole through which the tightening bolt can be inserted. The bent pieces are connected in series, and the back surface of the bent pieces is formed as an inclined surface that can contact the inclined support surface of the recess, and the surface thereof is substantially the same as the inclined surface of the connecting member. A concrete block pulling and connecting device having an inclined angle and formed on an inclined surface capable of contacting the inclined surface. 3. A concrete block pulling and connecting device that draws and connects concrete blocks to each other using a connecting tool, wherein inserts are embedded in required block surfaces on the connecting side of both blocks, wherein the connecting tool is The tightening bolt screwed to the insert, a connecting member that connects the concrete blocks to each other, and a pair of operating members that are arranged so as to overlap the end portions of the connecting member are provided. , Each of which has a long hole through which the tightening bolt can be inserted and has a length corresponding to a stroke required for pulling the concrete block, is provided at both end portions of the member, The member is located on the outer side of the hole, and has an inclined surface that inclines toward the rear surface of the member from the outer end to the inner end thereof. The fixing piece, which has an insertion hole through which the tightening bolt can be inserted and is arranged in contact with the surface side of the end portion of the connecting member, has an inclination angle substantially the same as the inclined surface of the connecting member. And a pulling and connecting device for a concrete block, wherein the pulling and connecting device is provided with an inclined surface that can come into contact with the inclined surface. 4. A concrete block pulling and connecting device, wherein the connecting member and the actuating member are both formed by bending a single plate-shaped body. 5. The pulling and connecting device for a concrete block, wherein the connecting member and the actuating member are both formed by cutting out from a single plate-shaped body.