JP2001032388A - Concrete block joint structure and coupling used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete block joint structure capable of firmly connecting concrete blocks in a state of pressure-welding. SOLUTION: A clamping member 92 attached to a male screw section 30a of a joint rod 30 in one divided block DB2 and a guide member 91 attached to a male screw section 30a of a joint rod 30 in the other divided block DB1 are turned to clamp a female screw hole 92a of the clamping member 92 to the male screw section 30a of the joint rod 30. By the constitution, force in the direction pulling near to each other is given tot the joint rods 30 and 30 opposed to each other, a state giving the specific pull can be maintained, and accordingly, the pressure-welding of the divided blocks DB1 and DB2 is made to enable the divided blocks DB1 and DB2 to firmly connect with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block connecting structure useful for connecting concrete blocks at a construction site, and a coupler used for the connecting structure.

[0002]

2. Description of the Related Art Concrete blocks used when constructing concrete structures such as beams, retaining walls, culverts, and waterways are intended to improve work efficiency, accuracy, and quality control.
Manufactured outside of construction sites. However, in the case where the block itself is large and heavy, or in the case of a block having a complicated shape, the work load and cost involved in transport increase, and a large storage space is required.

Therefore, in recent years, a method has been adopted in which the concrete block is divided and manufactured in advance, and the divided block is carried into a construction site and connected as necessary. For example, as shown in FIG. 44, a culvert block having a predetermined shape is divided into upper and lower parts in advance and manufactured, and the divided blocks 201 and 202 are connected at a construction site.

[0004] Recesses 201a and 202a are formed on the side surfaces of the ends of the divided blocks 201 and 202 on the connecting surface side at intervals. Also, each recess 201a,
Ends 201b and 202b of the internal rebar buried in the block are exposed inside 202a.

When connecting the divided blocks 201 and 202, the two divided blocks 201 and 202 are combined as shown in the figure with a packing (not shown) interposed therebetween. Then, the opposite reinforcing bar ends 201b and 202b are individually welded to integrate the two divided blocks 201 and 202.

[0006]

However, in the above-mentioned connecting method, a welding operation at one point requires 5 to 10 minutes, so that even if a plurality of welding workers are used, a series of connecting operations is completed. It takes a considerable amount of time to perform welding, and the welding quality tends to vary depending on the environmental conditions and the capabilities of the operator.

Also, the end portions 201b and 202b of the internal rebar are provided.
The packing cannot be sufficiently pressed at the time of connection because only the members are welded. In other words, it is difficult to connect the two divided blocks 201 and 202 in an appropriate press-contact state even with the packing interposed therebetween, and it is difficult to secure the desired airtightness and watertightness.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a concrete block connecting structure capable of firmly connecting concrete blocks in a proper press-contact state, and a useful structure for this connecting structure. It is to provide a coupler.

[0009]

In order to achieve the above object, a concrete block connecting structure according to the present invention is a concrete block connecting structure formed by connecting concrete blocks to each other, comprising a first concrete block. A second concrete block, a first connecting rod embedded in the first concrete block such that a male screw portion provided at the tip is exposed from the first concrete block, and a male screw portion provided at the tip. (2) a second connecting rod buried in the second concrete block so as to be exposed from the concrete block, and a female screw part to which a male screw part of the first connecting rod can be screwed; A fastening member disposed on the first connecting rod in a state where the female thread is screwed into the male thread of the first connecting rod; At one end, there is an insertion hole through which a portion of the connecting member excluding the circular flange can be inserted from the inside with a margin and an inner surface step at which the circular flange can abut, and a male screw portion of the second connecting rod is screwed. A possible female screw portion is provided at the other end, and a portion other than the circular flange of the tightening member is inserted into the insertion hole so as to protrude from the insertion hole, and a female screw portion is provided on the male screw portion of the second connecting rod. A cylindrical guide member disposed on the second connecting rod in a state where the screw portion is screwed, wherein the female screw portion of the tightening member is tightened to the male screw portion of the first connecting rod, and the circular flange is formed of the guide member. The main feature is that the first connecting rod and the second connecting rod are brought into contact with each other so that the first connecting rod and the second connecting rod are attracted and the first concrete block and the second concrete block are pressed against each other.

According to this connecting structure, the tightening member of the first connecting rod of the first concrete block and the tightening member of the guide member disposed on the second connecting rod of the second concrete block are turned. By tightening the female screw portion of the tightening member to the male screw portion of the first connecting rod, a force in a direction of attracting each other to the opposing first and second connecting rods is applied, and a predetermined pulling force is applied. Can be maintained, whereby the first and second concrete blocks can be pressed against each other and the first and second concrete blocks can be firmly connected to each other.

On the other hand, according to the coupler of the present invention, the first coupling rod is buried such that the male screw portion at the tip thereof is exposed.
A connector used when interconnecting a concrete block and a second concrete block embedded such that a male screw portion at the tip of the second connecting rod is exposed, wherein the male screw portion of the first connecting rod is used. Has a female screw portion which can be screwed, and has a circular flange for movement restriction on its outer surface,
With the female screw part screwed into the male screw part of the connecting rod,
A tightening member arranged on the connecting rod, a portion excluding the circular flange of the tightening member has at one end an inner surface step at which the circular flange can abut with an insertion hole that can be inserted with a margin from the inside,
In addition, the other end of the second connection rod has a female screw portion to which the male screw portion can be screwed, and the fastening member is arranged in a state where a portion excluding its circular flange is inserted into the insertion hole and protrudes from the insertion hole. The main feature is that a cylindrical guide member is provided on the second connecting rod in a state where the female thread is screwed to the male thread of the second connecting rod.

According to this coupler, the fastening member is attached to the male thread of the first connecting rod of the first concrete block, and the guide member is attached to the male thread of the second connecting rod of the second concrete block. Later, by turning the tightening member and tightening the female screw portion of the tightening member to the male screw portion of the first connecting rod, a force in a direction of attracting each other to the opposing first and second connecting rods is provided, In addition, a state where a predetermined pulling force is applied can be maintained.

[0013]

1 to 5 show one embodiment of the present invention. In FIG. 1 to FIG.
B2 is a divided block, 10 is an internal reinforcing bar, 30 is a connecting rod, and 50 is a connecting device.

The divided blocks DB1 and DB2 are for a beam block, and are connected left and right to form a beam block having a predetermined shape (see FIG. 1). The divided blocks DB1 and DB2
Is a precast concrete product manufactured in advance outside the construction site, and is carried into the construction site without being connected.

Each of the divided blocks DB1 and DB2 has an internal reinforcing bar 10 for reinforcement. The internal rebar 10 is arranged so as to connect between eight main rebars 11 parallel to each other, four stirrups 12 arranged so as to surround the outer side of the main rebars 11, and ends of the stirrups 12. 4 auxiliary muscles 1
3 and are assembled in a similar manner to each of the divided blocks DB1 and DB2, and then joined by welding or other methods to be integrated. Of course, a member having a structure other than the illustrated example may be used as the internal reinforcing bar, and a member having a reinforcing bar (not shown) parallel to the main bar 11 may be used as the internal reinforcing bar.

A recess 40 having openings on the upper and lower surfaces and the connection surface side is provided with a gap between the upper and lower surfaces on the connection surface side of the divided block DB1 and the upper and lower surfaces on the connection surface side of the divided block DB2. In each case.

Further, four connecting rods 30 each having a predetermined length are embedded in each of the divided blocks DB1 and DB2 so as to be parallel to the main bar 11. In the illustrated example, a deformed reinforcing bar is used as the connecting rod 30, and the connecting rod 30 is joined to the internal reinforcing bar 10 by welding or another method. That is, the divided block D
B1 and DB2 are manufactured using the internal reinforcing bar 10 in which the connecting rod 30 is integrated. In addition, each connecting rod 3
0 has a male screw portion 30 a at one end thereof, and the male screw portion 30 a is exposed in each recess 40.

Incidentally, the thickness of the connecting rod 30 is appropriately selected according to conditions such as the weight of the divided blocks to be connected and the external force applied to the connected beam blocks. Further, the size of the connector 50 described later in detail also depends on the connecting rod 3.
It is appropriately selected according to the thickness of 0 and the same conditions as described above.

For example, in the beam block as in this embodiment, a pulling force acts on the lower surface side and a compressive force acts on the upper surface side. Therefore, the lower surface side where the tensile force acts acts on the upper surface side where the compressive force acts. Rather, it is better to use a thicker connecting rod 30 and a correspondingly larger connecting device 50. Of course, even if the thickness of the connecting rod 30 and the size of the connecting device 50 are the same, the number of the connecting rods 30 and the connecting devices 50 on the lower surface on which the pulling force acts is larger than the number on the upper surface on which the compressive force acts. Good.

Further, in this embodiment, a deformed reinforcing bar having a convex surface is used as the connecting rod 30, and the connecting rod 30 is integrated with the inner reinforcing bar 10.
The desired tensile strength is secured at zero.
If the desired tensile strength can be obtained without integrating the connecting rod 30 into the internal reinforcing bar 10, the connecting rod 3
0 does not necessarily need to be joined to the internal reinforcing bar 10.

As shown in FIGS. 3 and 4, the coupler 50 includes a first fastening member 51 and a second fastening member 52.
And two nuts 53 that can be attached to the male screw portion 30a of the connecting rod 30.

The first fastening member 51 is connected to the connecting rod 30.
Insertion hole 51a having a diameter slightly larger than the outer diameter of
And an insertion hole 51b having a diameter slightly larger than the outer diameter of the nut 53 via a step 51c. A nut-like portion 51d with which a tool such as a wrench (not shown) can be engaged is provided at the end of the first fastening member 51 on the side of the insertion hole 51a. Further, a male screw portion 51e is provided on the outer surface of the insertion hole 51b of the first fastening member 51.

The second fastening member 52 is connected to the connecting rod 30.
Insertion hole 52a having a diameter slightly larger than the outer diameter of
And a female screw hole 52b corresponding to the male screw portion 51e,
It has through step 52c. A nut-like portion 52d with which a tool such as a wrench (not shown) can be engaged is provided at an end of the second fastening member 52 on the side of the insertion hole 52a.

As can be seen from the drawing, the threads of the male screw portion 51e of the first fastening member 51 and the female screw hole 52b of the second fastening member 52 in this connector 50 are both right-hand threads, and The threads of the male screw portion 30a are all left-hand threads. Needless to say, at least one of the threads of the external thread portion 30a of the connecting rod 30 is a right-hand thread, or the external thread portion 51e of the first fastening member 51 and the thread of the female thread hole 52b of the second fastening member 52 are set to the left. Even with screws, it is possible to carry out the desired block connection.

When connecting the two divided blocks DB1 and DB2 by the coupler 50, first, as shown in FIG.
Is covered with the second fastening member 52, and a nut 53 is attached to the male screw portion 30a. Also, the first fastening member 51 is placed outside the exposed portion of the connecting rod 30 in the other divided block DB2, and the nut 53 is attached to the male screw portion 30a. Note that, depending on the relationship between the opposing interval of the connecting rods 30 and the sizes of the components of the coupler 50 when the blocks are combined, this mounting operation can be performed after the blocks are combined, which will be described later.

If a mark indicating the nut mounting position is attached to each male screw portion 30a, the mounting position of the nut 53 with respect to the male screw portion 30a can be easily determined. Further, if an adhesive is applied to the inner surface of the nut 53 in advance, or if two nuts having a small thickness are used as the nut 53 and one of the nuts is used to fix the other nut, the nut mounting position varies. Can be prevented.

Next, two divided blocks DB1 and DB2
Are assembled so that the concave portions 40 of the connecting rods coincide with each other, in other words, the packings (not shown) are sandwiched such that the center lines CL (see FIG. 5) of the connecting rods 30 coincide with each other. By the way, if the connecting surface of the divided block DB1 and the divided block DB2 is provided with a convex portion and a concave portion that engage with each other, the above-described combination work can be easily performed, and the shearing resistance of the connected block can be reduced. Can be improved.

Next, the tightening members 51 and 52 attached to the opposing connecting rods 30 are turned with a fingertip,
The male screw portion 51e of the first tightening member 51 is lightly tightened into the female screw hole 52b of the second tightening member 52.

Next, the nut-like portion 51d of the first fastening member 51 and the nut-like portion 52d of the second fastening member 52
The male screw of the first tightening member 51 is rotated by rotating the tightening members 51 and 52 in the opposite direction with the tool engaged, or by rotating only the other tightening member while holding down one of the tightening members. The part 51e is the second
It is tightened into the female screw hole 52b of the tightening member 52.

As the tightening proceeds, the nuts 53 attached to the male thread portions 30 a of the connecting rods 30 abut against the step 51 c of the first tightening member 51 and the step 52 c of the second tightening member 52. When the tightening is further continued thereafter, each connecting rod 30 is pulled in the direction of the arrow in FIG. 3, whereby the connecting surfaces of the divided blocks DB1 and DB2 are pressed against each other with no gap via the packing. Division block DB1 and division block DB2
In order to press-contact the connecting surfaces without unevenness, it is desirable to perform the above-mentioned tightening work evenly on the four connectors 50.

By this tightening, a pulling force acts on each connecting rod 30 in the direction of the arrow in FIG. 3, but as described above, each connecting rod 30 has a sufficient strength against this (adhesion to concrete). ) Is secured, so that the connecting rod 30 does not fall out of the block during tightening. In addition, each connecting rod 3
Since the tensile force acting on zero is dispersed in the block via the concrete contact surface, no crack is generated due to local stress concentration.

The insertion hole 51 of the first fastening member 51
a and the connecting rod 30 and between the insertion hole 52a of the second fastening member 52 and the connecting rod 30 have some play, so that there is a deviation in the center line CL of the opposing connecting rod 30. However, the displacement can be absorbed by the play, and the connecting operation can be performed properly.

Further, the thread direction of the male screw portion 51e of the first fastening member 51 and the thread direction of the female screw hole 52b of the second fastening member 52 and the thread direction of the male screw portion 30a of the connecting rod 30 are reversed. So, at the time of the above-mentioned tightening work,
The nut 53 attached to the male screw portion 30a of the connecting rod 30 does not come loose. Of course, as described above, an adhesive is applied to the inner surface of the nut 53 attached to the male screw portion 30a in advance, or the nut 53 is
Even if two nuts having a small thickness are used and one nut is used to fix the other nut, the same loosening prevention effect as described above can be obtained.

The above-mentioned tightening operation is performed in the divided block DB.
1 and the divided block DB2 are continued until they come into pressure contact with each other through a packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening operation is completed, a hardening material (not shown) is filled in each recess 40 and hardened. As the hardening material, reinforced mortar made of a mixture of mortar and resin can be preferably used. Thereby, the loosening of the connector 50 is prevented, and the shear strength of the connecting portion is improved. Thus, a series of connection work is completed.

According to the above-described concrete block connecting structure, a simple operation of rotating at least one of the first tightening member 51 and the second tightening member 52 using a tool after combining the divided blocks DB1 and DB2. Thereby, the connecting surfaces of the divided blocks DB1 and DB2 can be pressed into contact with each other via the packing, and the two blocks DB1 and DB2 can be firmly connected.

Further, since the pulling force can be applied to the connecting rods 30 facing each other by the above-described tightening operation to sufficiently press the packing, the divided block DB1 can be used.
And DB2 are connected in an appropriate press-contact state, so that the desired airtightness and watertightness can be properly secured.

Further, since a state in which a pulling force is applied to the opposing connecting rods 30 can be maintained, the connection between the divided blocks DB1 and DB2 does not become loose even when an external force is applied, and the connecting blocks are connected for a long time. A good state can be maintained.

Furthermore, since the coupler 50 can be made compact and the coupler 50 can be easily attached to the divided blocks DB1 and DB2, it is necessary to keep the coupler 50 attached to the block before coupling. Without connector 5
There is an advantage that 0 can be stored and managed in another place.

In place of the nut-shaped portion 51d of the first fastening member 51 and the nut-shaped portion 52d of the second fastening member 52, a toothed ring-shaped portion (rectangular grooves are formed at regular intervals in the circumferential direction) as shown in FIG. (Lined portions) 51f and 52e may be provided. In this case, the toothed portions 51f and 52
A tool having a projection or the like that can be engaged with e is used as a tool.

Further, it is possible to prevent the connecting rod 30 and the two fastening members 51 and 52 from being plastically deformed by an external force applied to the connected block, and to maintain good connection strength, watertightness and airtightness of the block. The method shown in FIG. 7, FIG. 8 or FIG.

In the method shown in FIG. 7, two fixing nuts 54 are previously attached to each of the male screw portions 30a of the connecting rod 30, and after the tightening work of the first tightening member 51 and the second tightening member 52 is completed. The first fastening member 51 and the second fastening member 5 are tightened by fastening the fixing nut 54.
2 is fixed. Of course, the same fixing can be performed even with one fixing nut 54.

The method shown in FIG.
At least one injection hole 51g communicating with the insertion holes 51a and 51b is formed on the outer surface of the second fastening member 52, and the injection hole 52 communicating with the insertion hole 52a and the female screw hole 52b is formed on the outer surface of the second fastening member 52.
At least one f is formed, and the hardening material HM is injected into one of the injection holes from the injection nozzle PN. The injected hardening material HM has a female screw hole 52b.
And the insertion hole 51a, 52a
And enters the gap between the connecting rod 30 and hardens. As the curing material HM, a material prepared by mixing an epoxy-based or polyester-based resin with an extender or the like can be preferably used.

The method shown in FIGS. 9A and 9B is a method in which a predetermined amount of the hardening material HM is filled in advance in the female screw hole 52b of the second tightening member 52, and then the female screw of the second tightening member 52 is formed. The male screw portion 51e of the first fastening member 51 is fastened to the hole 52b. The hardening material HM enters a gap between the female screw hole 52b and the male screw portion 51e or a gap between the insertion holes 51a, 52a and the connecting rod 30 according to the tightening, and hardens after the tightening operation is completed. The curing material HM used here is the same as described above. While the male screw portion 51e of the first fastening member 51 is being screwed into the female screw hole 52b of the second fastening member 52, the two fastening members 51, 5
When the vibration is given by shaking 2 or the like, it is possible to promote the hardening material HM to go into the gap.

Further, in the above embodiment, the connecting rod 30 using a straight deformed reinforcing bar is shown. However, the connecting rod shown in FIG. 10A, FIG. 10B or FIG. If adopted, the adhesive strength of the connecting rod 30 to concrete can be increased, and its tensile strength can be improved. The connecting rod 30 shown in FIG.
The reinforcement member 31 bent in a wave form is joined along the length direction. The connecting rod 30 shown in FIG.
A plurality of bar-shaped reinforcing members 32 are joined in parallel at intervals in the length direction. The connecting rod 30 in FIG.
A plurality of bar-shaped reinforcing members 33 are provided for two connecting rods 30.
Are joined in parallel at intervals in the length direction. Of course, the same effect can be expected even if the connecting rod 30 itself is bent to form a corrugated portion or an L-shaped portion.

Further, in the above embodiment, the main muscle 1
1, the stirrups 12 and the auxiliary bars 13 constitute the internal reinforcing bar 10, but as shown in FIG. 11, a resin net 14 formed in a grid or other pattern, or a grid or other pattern If the wire net 15 braided in the step is interposed between the main bar 11 and the connecting rod 30, the brittle resistance of the divided block itself can be increased. Further, the stress acting between the connecting rod 30 and the concrete to which the connecting rod 30 is attached at the time of block connection can be effectively dispersed by the resin net 14 and the wire net 15, and further effectively by the internal reinforcing bar 10. Can be dispersed. By the way, the wire mesh 1
5 may be connected to at least one of the internal reinforcing bar 10 and the connecting rod 30.

Hereinafter, an example of a coupler having a structure other than the above will be described with reference to FIGS.

The coupler 60 shown in FIGS.
It is composed of a fastening member 61, a second fastening member 62, and one nut 63 that can be attached to the male screw portion 30 a of the connecting rod 30.

The first fastening member 61 is connected to the connecting rod 30.
Has a female screw hole 61a corresponding to the male screw portion 30a at the center. The female screw hole 61 of the first fastening member 61
A nut-shaped portion 61b with which a tool (not shown) such as a wrench can be engaged is provided on the opening side of “a”. Further, a male screw portion 61c is provided on the outer surface of the first fastening member 61.

The second fastening member 62 is connected to the connecting rod 30.
Insertion hole 62a having a diameter slightly larger than the outer diameter of
And a female screw hole 62b corresponding to the male screw portion 61c,
It has through step 62c. A nut-like portion 62d with which a tool such as a wrench (not shown) can be engaged is provided at an end of the second fastening member 62 on the side of the insertion hole 62a.

As can be seen from the drawing, the threads of the male screw portion 61c of the first tightening member 61 and the female screw hole 62b of the second tightening member 62 in the coupler 60 are both right-hand threads. In addition, a nut 63 is used during a tightening operation described later.
In order to prevent loosening, the thread of the male thread portion 30a of the connecting rod 30 on the second fastening member 62 side is a left-hand thread. Of course, at least one of the threads of the external thread portion 30a of the connecting rod 30 is a right-hand thread, or
Even if the thread of the male screw portion 61c of the fastening member 61 and the female screw hole 62b of the second fastening member 62 are left-handed screws, the desired block connection can be performed.

When the two divided blocks DB1 and DB2 are connected by the connecting device 60, first, as shown in FIG.
Cover the second tightening member 62 outside the exposed portion of
The nut 63 is attached to the male screw part 30a. Also,
The first fastening member 61 is attached to the male screw portion 30a of the connecting rod 30 of the other divided block DB2. still,
Depending on the relationship between the spacing between the connecting rods 30 and the size of the components of the coupler 60 when the blocks are combined, this mounting operation can be performed after the blocks are combined, which will be described later.

If a mark indicating the mounting position of the nut 63 and the second tightening member 62 is attached to each male screw portion 30a, the mounting position of the nut 63 and the second tightening member 62 with respect to the male screw portion 30a can be easily determined. . If an adhesive is applied to the inner surface of the nut 63 in advance, or if two nuts having a small thickness are used as the nut 63 and one of the nuts is used to fix the other nut, the nut mounting position varies. Can be prevented.

Next, two divided blocks DB1 and DB2
Of the connecting rods 30 so that the recesses 40 of the connecting rods coincide with each other, in other words, the center lines CL of the connecting rods 30 (see FIG. 14).
Are combined with a packing (not shown) interposed therebetween so that

Next, the tightening members 61 and 62 attached to the opposing connecting rods 30 are turned with fingertips,
The female screw hole 62b of the second fastening member 62 is lightly fastened to the male screw portion 61c of the first fastening member 61.

Next, the nut-like portion 61b of the first fastening member 61 and the nut-like portion 62d of the second fastening member 62
By rotating only the second fastening member 62 while pressing the first fastening member 61 in a state where the tool is engaged with the tool, the male screw portion 61c of the first fastening member 61
The female screw hole 62b of the tightening member 62 is tightened. First
Since the pitch of the thread of the external thread 61c of the fastening member 61 is larger than the pitch of the thread of the external thread 30a of the connecting rod 30, only the first fastening member 61 is rotated while pressing the second fastening member 62. The same tightening operation can be performed.

As the tightening proceeds, the nut 63 attached to the male screw portion 30a of the connecting rod 30 comes into contact with the step 62c of the second tightening member 62. When the tightening is further continued thereafter, each connecting rod 30 is pulled in the direction of the arrow in FIG. 12, whereby the divided block DB1 and the divided block DB2 are pressed against each other with no gap via the packing.

Since there is some play between the insertion hole 62a of the second fastening member 62 and the connecting rod 30, even if the center line CL of the opposing connecting rod 30 is displaced, this displacement is eliminated. Thus, the connection work can be properly performed.

The male screw portion 6 of the first tightening member 61
1c and the thread direction of the female screw hole 62b of the second fastening member 62 and the thread direction of the male thread portion 30a of the connecting rod 30 are made different, so that during the above-mentioned fastening operation,
The nut 63 attached to the male screw portion 30a of the connecting rod 30 does not come loose. Of course, as described above, an adhesive is applied to the inner surface of the nut 63 attached to the male screw portion 30a in advance, or the nut 63 is
Even if two nuts having a small thickness are used and one nut is used to fix the other nut, the same loosening prevention effect as described above can be obtained.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided block DB2 are continued until they come into pressure contact with each other through a packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening operation is completed, the same hardening material (not shown) is filled in each recess 40 and hardened. Thus, the coupling 60 is prevented from being loosened, and the shear strength of the connecting portion is improved. Thus, a series of connection work is completed.

In place of the nut-like portion 61b of the first tightening member 61 and the nut-like portion 62d of the second tightening member 62, a toothed ring-like portion (rectangular grooves are formed at regular intervals in the circumferential direction) as shown in FIG. (Lined portions) 61d and 62e may be provided. In this case, the ring-shaped portions 61d and 6d
A tool having a protrusion or the like engageable with 2e is used as a tool.

Further, it is possible to prevent the connecting rod 30 and the two fastening members 61 and 62 from being plastically deformed by the external force applied to the block after the connection, and to maintain the connection strength, watertightness and airtightness of the block satisfactorily. The method shown in FIG. 16 can be adopted.

In the method shown in FIG. 16, two fixing nuts 64 are previously attached to each of the male screw portions 30a of the connecting rod 30, and after the tightening work of the first tightening member 61 and the second tightening member 62 is completed. Fixing nut 64
To fix the first fastening member 61 and the second fastening member 62. Of course, the same fixing can be performed even with one fixing nut 64. Although the description is omitted, the same effect can be obtained by employing the same method as the method shown in each of FIGS.

The coupler 70 shown in FIGS. 17 to 19 comprises a cylindrical guide member 71, a cover member 72 for closing the opening of the guide member 71, two fastening members 73, two spring washers 74, a coil And a spring 75.

The guide member 71 has an internal cavity 71a having a circular cross section and a female screw portion 71b provided on the inner surface of the opening of the internal cavity 71a. Further, a fastening member 7 is provided at an end of the guide member 71 opposite to the female screw portion 71b.
A third insertion hole 71c is provided, and a step 71d is provided inside the insertion hole 71c. Reference numeral 71e is a hole for injecting a curing material.

The lid member 72 has an insertion hole 72a for the fastening member 73 at the center, and the female screw portion 7
It has a male screw portion 72b corresponding to 1b.

Each of the fastening members 73 is inserted into the insertion hole 71c.
And 72a. At the center of one end of each fastening member 73, a female screw hole 73a corresponding to the male screw portion 30a of the connecting rod 30 is provided. A circular flange 73b having a diameter smaller than that of the internal cavity 71a is provided on the outer surface of the other end of each of the fastening members 73.

As can be seen from the drawing, the thread of the female screw hole 73a of each tightening member 73 in this connector 70 is a right-hand thread, and the male screw portion 30a of the connecting rod 30 is formed.
Are all right-hand threads. Of course, even if at least one of the threads of the external thread portion 30a of the connecting rod 30 is a left-hand thread and the thread of the fastening member 73 is changed in accordance with this, the desired block connection can be performed.

The coupler 70 is assembled before performing the coupling operation. In this assembly, as shown in FIG. 18, a spring washer 74, a fastening member 73, a coil spring 75, a fastening member 73,
After the spring washers 74 are inserted in order, the male screw portion 72b of the lid member 72 is tightened to the female screw portion 71b of the guide member 71.

When the two divided blocks DB1 and DB2 are connected by the connecting device 70, first, as shown in FIG. 19, the connecting surfaces of the two divided blocks DB1 and DB2 are set so that the concave portions 40 thereof coincide with each other. In other words, they are combined with a packing (not shown) interposed therebetween such that the center lines CL of the connecting rods 30 coincide with each other.

Next, in a state where the fastening member 73 of the pre-assembled coupling 70 is pushed into the guide member 71 against the urging force of the coil spring 75, the coupling 7
0 is inserted into the recess 40. After the insertion, the pressing of each tightening member 73 is released, and each female screw hole 73a is released.
To the male screw portion 30a of the connecting rod 30, and turn each tightening member 73 with a fingertip to lightly tighten the male screw portion 30a.

Next, in a state where a tool is engaged with each of the tightening members 73, each of the tightening members 73 is rotated in the opposite direction, so that the female screw holes 7 of each of the tightening members 73 are rotated.
3a is fastened to each of the male screw portions 30a of the connecting rod 30. Of course, this tightening operation is performed by the tightening member 73.
Alternatively, it may be performed by rotating only the other while pressing one of them.

As the tightening progresses, the circular flange 73 b of each tightening member 73 is moved by the step 71 d of the guide member 71 and the lid member 7.
2 comes into contact with the end face via a spring washer 74.
When the tightening is further continued after this, each connecting rod 3
0 is drawn in the direction of the arrow in FIG. 17, whereby the divided block DB1 and the divided block DB2 are pressed against each other with no gap via the packing.

Since there is some play between the insertion hole 71c of the guide member 71 and the tightening member 73 and between the insertion hole 72a of the cover member 72 and the tightening member 73, the center of the connecting rod 30 opposed to each other is provided. Even if the line CL is shifted,
This displacement is absorbed by the play, and the connecting operation can be performed properly.

In the event that the lid member 72 tightened to the guide member 71 is loosened during the tightening, the direction of the thread of the male screw portion 72b of the lid member 72 is changed to the female screw of the tightening member 73. The direction of the thread of the hole 73a may be reversed. Of course, when the cover member 72 is fastened to the guide member 71, an adhesive may be applied to the male screw portion 72b of the cover member 72 in advance.

The above-mentioned tightening operation is performed in the divided block DB.
1 and the divided block DB2 are continued until they come into pressure contact with each other through a packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening operation is completed, the same hardening material (not shown) is filled in each recess 40 and hardened. Thus, the coupling 70 is prevented from being loosened, and the shear strength of the connecting portion is improved. Thus, a series of connection work is completed.

The coupler 80 shown in FIGS. 20 to 22 comprises a cylindrical guide member 81 and two fastening members 82.

The guide member 81 has an internal cavity 81a having a circular cross section. An insertion opening 81b for inserting the fastening member 82 into the internal cavity 81a is provided on the outer peripheral surface of the guide member 81. Further, insertion holes 81c for the fastening members 82 are provided at both end surfaces of the guide member 81.
Are provided, and a step 81d is provided inside the insertion hole 81c.

Each of the fastening members 82 is provided in the insertion hole 81c.
It has a hexagonal prism shape that can be inserted into a. At the center of one end of each fastening member 82, the male screw portion 30 of the connecting rod 30 is provided.
The female screw hole 82a corresponding to a is provided. Also,
The outer surface of the other end of each fastening member 82 is provided with the internal cavity 8.
A circular flange 82b smaller than 1a is provided.

As can be seen from the drawing, the threads of the female screw holes 82a of the respective tightening members 82 in the connector 80 are all right-handed threads, and the male screw portion 30a of the connecting rod 30 is provided.
Are all right-hand threads. Of course, even if at least one of the threads of the external thread portion 30a of the connecting rod 30 is a left-hand thread, and the thread of the fastening member 82 is changed in accordance with the left-hand thread, the desired block connection can be performed. .

The coupler 80 is assembled in advance before performing the coupling operation. This assembling is performed by inserting two fastening members 82 into the guide member 81 through the insertion opening 81b as shown in FIG.

When the two divided blocks DB1 and DB2 are connected by the coupler 80, first, as shown in FIG. 22, the connecting surfaces of the two divided blocks DB1 and DB2 are set so that the concave portions 40 of the two coincide with each other. In other words, they are combined with a packing (not shown) interposed therebetween such that the center lines CL of the connecting rods 30 coincide with each other.

Next, with one or both of the fastening members 82 of the previously assembled coupler 80 being pushed into the guide member 81, the coupler 80 is inserted into the recess 40. After insertion, each fastening member 82 is pulled out from the insertion hole 81c, each female screw hole 82a is aligned with the male screw portion 30a of the connecting rod 30, and each tightening member 82 is turned with a fingertip to lightly tighten the male screw portion 30a. .

Next, in a state in which the tool is engaged with each of the fastening members 82, the fastening members 82 are rotated in the opposite directions, whereby the female screw holes 8 of each of the fastening members 82 are rotated.
2a is fastened to each of the male screw portions 30a of the connecting rod 30. Of course, this tightening operation is performed by the tightening member 82.
Alternatively, it may be performed by rotating only the other while pressing one of them.

As the tightening proceeds, the circular flange 82 b of each tightening member 82 comes into contact with the step 81 d of the guide member 81. When the tightening is further continued after this, each connecting rod 30 is pulled in the direction of the arrow in FIG. 20, whereby the divided block DB1 and the divided block DB2 are pressed against each other with no gap via the packing.

Since there is some play between the insertion hole 81c of the guide member 81 and each of the tightening members 82, even if the center line CL of the opposing connecting rod 30 is displaced,
This displacement is absorbed by the play, and the connecting operation can be performed properly.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided block DB2 are continued until they come into pressure contact with each other through a packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening operation is completed, the same hardening material (not shown) is filled in each recess 40 and hardened. This prevents the coupling device 80 from being loosened and improves the shear strength of the coupling portion. Thus, a series of connection work is completed.

The coupler 90 shown in FIGS. 23 to 25 comprises a cylindrical guide member 91 and a fastening member 92.

The guide member 91 has an internal cavity 91a having a circular cross section. An insertion opening 91b for inserting the fastening member 92 into the internal cavity 91a is provided on the outer peripheral surface of the guide member 91. Further, one end surface of the guide member 91 has an insertion hole 9 for the fastening member 92.
1c is provided, and a step 91d is provided inside the insertion hole 91c. Further, a nut-like portion 91e with which a tool such as a wrench (not shown) can be engaged is provided on one end surface of the guide member 91, and a male screw portion of the connecting rod 30 is provided at the center of the nut-like portion 91e. A female screw hole 91f corresponding to 30a is provided.

The fastening member 92 has a hexagonal prism shape that can be inserted into the insertion hole 91c. At the center of the fastening member 92, a female screw hole 92a corresponding to the male screw portion 30a of the connecting rod 30 is provided. A circular flange 92b having a smaller diameter than the internal cavity 91a is provided on the outer surface of the other end of the fastening member 92.

As can be seen from the drawing, the thread of the female screw hole 91f of the guide member 91 and the thread of the female screw hole 92a of the fastening member 92 in this connector 90 are both right-handed threads, Each thread of the threaded portion 30a is also a right-hand thread. Of course, even if at least one of the threads of the male thread portion 30a of the connecting rod 30 is a left-hand thread and the threads of the guide member 91 and the fastening member 73 are changed in accordance with the left thread, the desired block connection can be performed. It is possible.

The coupler 90 is assembled in advance before the coupling operation is performed. This assembly is performed by inserting a fastening member 92 into the guide member 91 through the insertion opening 91b, as shown in FIG.

When the two divided blocks DB1 and DB2 are connected by the coupler 90, first, as shown in FIG. 25, the connecting surfaces of the two divided blocks DB1 and DB2 are set so that the concave portions 40 of the two blocks coincide with each other. In other words, they are combined with a packing (not shown) interposed therebetween such that the center lines CL of the connecting rods 30 coincide with each other.

Next, the connector 90 is inserted into the recess 40 while the fastening member 92 of the connector 90 assembled in advance is pushed into the guide member 91. When the length dimension of the guide member 91 is larger than the interval between the connecting rods 30 facing each other, the guide member 91 is inclined at this insertion as shown by a two-dot chain line in FIG.
May be inserted into one connecting rod 30.
After the insertion, the female screw hole 91f of the guide member 91 is aligned with the male screw portion 30a of one connecting rod 30, and the tightening member 92 is pulled out from the insertion hole 91c to remove the female screw hole 9c.
2a is aligned with the male screw portion 30a of the other connecting rod 30, and each of the guide member 91 and the tightening member 92 is turned with a fingertip to lightly tighten the male screw portion 30a.

Next, the nut-like portion 91 of the guide member 91
e, the guide member 91 and the tightening member 92 are rotated in opposite directions in a state where a tool is engaged with each of the tightening members 92, so that the female screw holes 91f of the guide member 91 are rotated.
To the male screw portion 30a of one connecting rod 30 and the female screw hole 92a of the fastening member 92 to the male screw portion 30a of the other connecting rod 30. Of course, this tightening operation may be performed by pressing only one of the guide member 91 and the tightening member 92 and rotating only the other.

As the tightening proceeds, the circular flange 92 b of the tightening member 92 comes into contact with the step 91 d of the guide member 91.
When the tightening is further continued after this, each connecting rod 3
0 is drawn in the direction of the arrow in FIG. 23, whereby the divided block DB1 and the divided block DB2 are pressed against each other with no gap via the packing.

Since there is some play between the insertion hole 91c of the guide member 91 and the tightening member 92, even if there is a shift in the center line CL of the opposing connecting rod 30, this shift is absorbed by the play. Thus, the connecting operation can be performed properly.

The above-described tightening operation is performed in the divided block DB.
1 and the divided block DB2 are continued until they come into pressure contact with each other through a packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening operation is completed, the same hardening material (not shown) is filled in each recess 40 and hardened. This prevents the coupling device 90 from being loosened and improves the shear strength of the coupling portion. Thus, a series of connection work is completed.

The coupler 100 shown in FIGS. 26 to 28 is composed of a first fastening member 101 and a second fastening member 102.

At the center of one end surface of the first fastening member 101, a female screw hole 101a corresponding to the male screw portion 30a of the connecting rod 30 is provided, and at the other end, a male screw portion 101b is provided.
Is provided. Further, on one end surface of the first fastening member 101, a toothed ring-shaped portion 101c in which rectangular grooves are arranged at equal intervals in the circumferential direction is provided.

A female screw hole 102a corresponding to the male screw portion 101b of the first tightening member 101 is provided at the center of one end surface of the second tightening member 102, and the male screw portion 30a of the connecting rod 30 is provided at the center of the other end surface. Female screw hole 10 corresponding to
2b is provided. Also, the second fastening member 102
Is provided with a toothed portion 102c in which rectangular grooves are arranged at equal intervals in the circumferential direction.

As can be seen from the drawing, this coupler 100
, The threads of the female screw hole 101a and the male screw portion 101b of the first tightening member 101 and the screw thread of the female screw hole 102a of the second tightening member 102 are all right-handed screws.
Male thread portion 30 of connecting rod 30 on fastening member 101 side
The thread of a is also a right-hand thread. The thread of the female screw hole 102b of the second fastening member 102 is a left-hand thread, and the thread of the male thread portion 30a of the connecting rod 30 on the second fastening member 102 is also a left-hand thread. Of course, the first
Female screw hole 101a and male screw portion 10 of tightening member 101
1b and the female screw hole 10 of the second fastening member 102
2a is a left-hand thread, and the first fastening member 10
The thread of the male screw portion 30a of the connecting rod 30 on the first side is a left-hand thread, and the female screw hole 1 of the second fastening member 102 is formed.
02b is a right-hand thread, and the second fastening member 1
Even if the thread of the male screw portion 30a of the connecting rod 30 on the 02 side is a right-hand thread, the desired block connection can be performed.

When connecting the two divided blocks DB1 and DB2 by the coupler 100, first, FIG.
As shown in (2), the second fastening member 102 is attached to the male screw portion 30a of the connecting rod 30 in one of the divided blocks DB1 using the female screw hole 102b. Also, the external thread 3 of the connecting rod 30 of the other divided block DB2
The first tightening member 101 is attached to Oa using the female screw hole 101a. Note that, depending on the relationship between the opposing interval of the connecting rods 30 when the blocks are combined and the size of the components of the coupler 100, this mounting operation may be performed after the blocks are combined, which will be described later.

Next, two divided blocks DB1 and DB2
Of the connecting rods 30 (see FIG. 28) so that the concave portions 40 of the connecting rods coincide with each other.
Are combined with a packing (not shown) interposed therebetween so that

Next, the fastening members 101 and 102 attached to the connecting rods 30 facing each other are turned with a fingertip, and the male screw portion 101b of the first fastening member 101 is rotated to the second position.
Lightly tighten the female screw hole 102a of the tightening member 102.

Next, the annular portion 101c of the first fastening member 101 and the annular portion 10c of the second fastening member 102
2c, the first fastening member 101 is rotated by the tool in a state where the tool is engaged with each of the tools, and the male screw portion 101b of the first fastening member 101 is rotated by the second fastening member 102.
Into the female screw hole 102a. This tightening is continued until the first tightening member 101 is connected to the second tightening member 102 without any gap.

Next, the first tightening member 101 and the second tightening member 102 after coupling are rotated in the same direction by a tool, and the female screw hole 101a of the first tightening member 101 is inserted into the male screw portion 30a of the connecting rod 30. Second fastening member 1
02 female screw hole 102b of connecting rod 30
0a. As a result, each connecting rod 30 is pulled in the direction of the arrow in FIG. 26, whereby the divided block DB1 and the divided block DB2 are brought into pressure contact with no gap via the packing.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided block DB2 are continued until they come into pressure contact under a predetermined pressure via packing. Thereby, the two divided blocks DB1 and DB2 are firmly connected.

After the tightening operation is completed, the same hardening material (not shown) is filled in each recess 40 and hardened. Thus, the coupling 100 is prevented from being loosened, and the shear strength of the connecting portion is improved. Thus, a series of connection work is completed.

An example of a concrete block connecting structure other than the beam block shown in FIG. 1 will be described below with reference to FIGS. In the drawing, a recess for accommodating the coupler is indicated by reference numeral 40.

FIG. 29 shows an example in which the present invention is applied to a culvert block. This culvert block is integrated by vertically combining two divided blocks DB3 and DB4, which have been manufactured in advance, through a packing (not shown) and connecting them by a coupler (not shown). I have. Each of the divided blocks DB3 and DB4 has an internal reinforcing bar (not shown) assembled in a similar shape to each block. The recess 40 is provided in each divided block D
Two are provided at an interval on the outer surface of the connection end of B3 and DB4. The connecting rod (not shown) is embedded in the divided blocks DB3 and DB4 in a joined or non-joined state with respect to the internal rebar, and its male screw portion is exposed in the concave portion 40. Any one of the above-described couplers is selectively used for connecting the divided blocks DB3 and DB4. The method of block connection is the same as the method described above.

FIG. 30 shows an example in which the present invention is applied to a culvert block. The culvert block is integrated by combining four divided blocks DB5 to DB8, which have been manufactured in advance, into a rectangular shape via a packing (not shown) and connecting them by a coupler (not shown). ing. In each of the divided blocks DB5 to DB8,
An internal reinforcing bar (not shown) assembled in a similar shape to each block is incorporated. The recess 40 is provided in each divided block D
Six are provided at intervals on the outer surface of the connection end portion of B5 to DB8, and two are provided at intervals on the inner surface. That is, in the culvert block after the construction, the number of concave portions (the number of couplers) on the side on which the tensile force acts is increased from the side on which the compressive force acts, thereby increasing the tensile strength. The connecting rod (not shown) is embedded in each of the divided blocks DB5 to DB8 in a joined or non-joined state with respect to the internal reinforcing bar, and its male screw portion is exposed in the concave portion 40. Any one of the above-described couplers is selectively used to connect the divided blocks DB5 to DB8. The method of block connection is the same as the method described above.

FIG. 31 shows an example in which the present invention is applied to a waterway block. This waterway block is integrated by combining three divided blocks DB9 to DB11 manufactured in advance in a U-shape via a packing (not shown) and connecting them by a coupler (not shown). Have been. Each of the divided blocks DB9 to DB11 has an internal reinforcing bar (not shown) assembled in a similar manner to each block. Six recesses 40 are provided at intervals on the outer surface of the connection end of each of the divided blocks DB9 to DB11, and two recesses 40 are provided at intervals on the inner surface. That is, the number of concave portions (the number of couplers) on the side on which the tensile force acts in the waterway block after construction is increased from the side on which the compressive force acts, thereby increasing the tensile strength. The connecting rod (not shown) is connected to each of the divided blocks DB9 to DB1 in a joined or non-joined state with respect to the internal rebar.
1 and its male screw portion is exposed in the recess 40. Any one of the above-described couplers is selectively used to connect the divided blocks DB9 to DB11. The method of block connection is the same as the method described above.

FIG. 32 shows an example in which the present invention is applied to a retaining wall block. This retaining wall block is formed by combining six divided blocks DB12 to DB16 manufactured in advance in a substantially L-shape via a packing (not shown).
These are integrated by connecting them by a connector (not shown). Each divided block DB12 to DB
An internal reinforcing bar (not shown) assembled in a similar manner to each block is built in the block 16. Six recesses 40 are provided at intervals on the outer surface of the connection end of each of the divided blocks DB12 to DB16, and four recesses 40 are provided at intervals on the inner surface. That is, the tensile strength is increased by increasing the number of concave portions (the number of couplers) on the side on which the tensile force acts on the retaining wall block after construction than on the side on which the compressive force acts. The connecting rod (not shown) is connected to each of the divided blocks DB in a joined or non-joined state with respect to the internal rebar.
12 to DB 16, and the male screw portion is exposed in the concave portion 40. This divided block DB1
Any one of the above-described couplers is selectively used for the connection between 2 and DB16. The method of block connection is the same as the method described above.

FIG. 33 shows an example in which the present invention is applied to a culvert block. This culvert block is integrated by combining eight divided blocks DB17 to DB24 manufactured in advance into a rectangular shape via packing (not shown) and connecting them by a coupler (not shown). ing. Each divided block DB17 to DB2
4 incorporates an internal reinforcing bar (not shown) assembled in a similar shape to each block. The three concave portions 40 are provided at intervals on the outer surface of the connection end portion of each of the divided blocks DB17 to DB24, and are provided two at intervals on the inner surface. In other words, the number of recesses on the side where the pulling force acts on the retaining wall block after construction (number of couplers)
Is increased from the side where the compressive force acts to increase the tensile strength. The connecting rod (not shown) is connected to each of the divided blocks DB17 in a state of being joined or not joined to the internal reinforcing bar.
DB24, and the male screw portion is exposed in the concave portion 40. This divided block DB17 ~
For connection of the DB 24, any one of the above-described connectors is selectively used. The method of block connection is basically the same as the method described above, but here, a prestress method is used for block connection.

The prestress method is a method whose main purpose is to cancel the stress caused by the load.
Here, the upper connected block (DB24, DB17, DB18) and the lower connected block (DB22, DB21
And DB20), a compressive force is applied in advance to the inner surface on which the tensile force acts to increase the tensile strength. In order to apply a compressive force, a tubular member called a sheath is embedded in each of the upper divided block (DB24, DB17, and DB18) and the lower divided block (DB22, DB21, and DB20). Then, a wire or cable (hereinafter, referred to as a tension member WM) made of a high-strength steel material or the like is inserted. And
By pulling and fixing both ends of the inserted tension member WM using a nut or an instrument having a taper, a compressive force is applied to the inner surface of each of the upper connection block and the lower connection block.

The following describes a method of connecting divided blocks that can be used when constructing a concrete structure, with reference to FIGS.
This will be described with reference to FIG. In the drawings, the main reinforcing bar of the internal reinforcing bar is indicated by reference numeral 11 and the connecting rod is indicated by reference numeral 30. Also, the coupler 50 shown in FIG. 3 will be referred to as the coupler.

FIGS. 34A and 34B show a method of connecting divided blocks in a T-shape. The connecting rod 30 is joined to the flat divided block DB25 by welding or another method so as to be orthogonal to the main reinforcing bar 11 of the internal reinforcing bar, and the external thread portion is exposed on the surface. The connecting rod 30 is embedded in the plate-shaped divided block DB 26, and the male screw portion is exposed in the concave portion 40. These divided blocks D
When connecting B25 and DB26, the first fastening member 51 and the second fastening member 52 are attached to each male screw portion. Then, the divided blocks DB25 and DB26
Are combined as shown in FIG. 34 (B), and then the first fastening member 51 and the second fastening member 52 are tightened.

FIGS. 35A and 35B show a method of connecting divided blocks in a T-shape. A T-shaped connecting rod 30 is embedded in the T-shaped divided block DB 27, and a male screw portion is exposed in the recess 40. The connecting rod 30 is embedded in the plate-shaped divided block DB27, and the male screw portion is exposed in the concave portion 40. When connecting these divided blocks DB27 and DB28, a first fastening member 51 and a second fastening member 52
Attach each. Then, the divided block DB 27
And DB28 as shown in FIG. 35 (B),
The work of fastening the first fastening member 51 and the second fastening member 52 is performed.

FIG. 36 shows a method of connecting divided blocks in a radial shape. Hexagonal prism-shaped divided block DB2
9 has a Y-shaped connecting rod 30 embedded therein, and three male screw portions are exposed on the surface. Flat-plate divided block DB
The connection rod 30 is embedded in 30 to DB 32, and the external thread portion is exposed in the recess 40. These divided blocks D
When connecting B29 to DB32, the first fastening member and the second fastening member of the connector 50 are attached to the respective male screw portions. And the divided blocks DB29 to DB
After combining the 32 as shown in the figure, the first fastening member and the second fastening member are tightened.

FIG. 37 shows a method of connecting divided blocks in a cross shape. Quadrangular prism-shaped divided block DB3
A cruciform connecting rod 30 is embedded in 3, and four male screw portions are exposed on the surface. Flat-plate divided block DB
The connecting rod 30 is embedded in 34 to DB 37, and the male screw portion is exposed in the concave portion 40. These divided blocks D
When connecting B33 to DB37, the first fastening member and the second fastening member of the connector 50 are attached to the respective male screw portions. And the divided blocks DB33 to DB
After combining 37 as shown in the figure, the first fastening member and the second fastening member are tightened.

FIG. 38 shows a method of connecting divided blocks in a cross shape. Cross-shaped divided block DB38
The main reinforcing bar 11 of the internal reinforcing bar is buried in parallel with the surface, the connecting rods 30 are buried in parallel with the main reinforcing bar 11, and the male screw portions provided at both ends of each connecting rod 30 are exposed in the concave portion 40. . The main reinforcing bars 11 of the internal reinforcing bars are buried in parallel in the plate-shaped divided blocks DB39 to DB42,
0 is embedded in parallel with the main bar 11, and each connecting rod 3
Male screw portions provided at both ends of the “0” are exposed in the concave portion 40. When connecting these divided blocks DB38 to DB42, the first fastening member and the second fastening member of the connector 50 are attached to the respective male screw portions. Then, after assembling the divided blocks DB38 to DB42 as shown in the figure, the work of fastening the first fastening member and the second fastening member is performed.

FIG. 39 shows a method of connecting divided blocks in a T-shape. T-shaped divided block DB43
The connecting rods 30 are buried in parallel with each other and are joined to each other. Male screw portions provided at both ends or one end of each connecting rod 30 are exposed in the concave portion 40. The connecting rods 30 are embedded in parallel in the plate-shaped divided blocks DB44 to DB46.
It is exposed within 0. These divided blocks DB43 to D
When connecting B46, the first fastening member and the second fastening member of the connector 50 are respectively attached to the male screw portions. Then, after the divided blocks DB43 to DB46 are combined as shown in the figure, the work of fastening the first fastening member and the second fastening member is performed.

FIG. 40 shows a method of connecting divided blocks in an L-shape. L-shaped divided block DB47
The connecting rods 30 are embedded in parallel in each of the connecting rods 3.
0 male screw portion is exposed in the concave portion 40. The connecting rods 30 are embedded in the plate-shaped divided blocks DB48 and DB49 in parallel, and the male screw portion of each connecting rod 30 is exposed in the recess 40. These divided block DB 47
When connecting DB49 to each other, a connector 5
The first and second tightening members are respectively attached. Then, after assembling the divided blocks DB47 to DB49 as shown in FIG.
The tightening work of the tightening member is performed.

FIG. 41 shows a method of connecting divided blocks in a T-shape. L-shaped divided block DB50
The connecting rod 30 is buried in parallel, the male thread of one connecting rod 30 is exposed on the surface, and the other connecting rod 3
0 male screw portion is exposed in the concave portion 40. The connecting rods 30 are buried in parallel in the plate-shaped divided block DB51, and the external thread portion of each connecting rod 30 is exposed in the recess 40. These divided blocks DB50 and DB51
Are connected, the first fastening member and the second fastening member of the connector 50 are respectively attached to the male screw portions.
Then, after combining the divided blocks DB50 and DB51 as shown in the figure, the work of fastening the first fastening member and the second fastening member is performed.

FIG. 42 shows a method of connecting the divided blocks into a curved shape. Curved divided block DB52
The connecting rods 30 are embedded along the curved surface, and the external thread portion of each connecting rod 30 is exposed in the recess 40.
The connecting rods 30 are embedded in parallel in the plate-shaped divided blocks DB53 and DB54, and the male screw portions of the connecting rods 30 are exposed in the concave portions 40. When these divided blocks DB52 to DB54 are connected, the first fastening member and the second fastening member of the connector 50 are attached to each male screw portion. Then, the divided block DB 52-
After assembling the DBs 54 as shown in the figure, the work of fastening the first fastening member and the second fastening member is performed.

FIG. 43 shows a method of connecting the divided blocks into a curved shape. Curved divided block DB55
The connecting rods 30 are embedded along the curved surface, and the external thread portion of each connecting rod 30 is exposed in the recess 40.
The connecting rods 30 are embedded in the curved divided blocks DB56 and DB57 along the curved surface, and the male screw portion of each connecting rod 30 is exposed in the concave portion 40. When connecting these divided blocks DB55 to DB57,
The first fastening member and the second fastening member of the coupler 50 are attached to each male screw portion. Then, after the divided blocks DB55 to DB57 are combined as shown in the figure, the work of fastening the first fastening member and the second fastening member is performed.

[0132]

As described above in detail, according to the concrete block connecting structure of the present invention, after the first and second concrete blocks are combined, the female screw of the fastening member is replaced with the male screw of the first connecting rod. By a simple operation of simply tightening the first and second connecting rods, it is possible to apply a force in a direction of attracting each other to the opposing first and second connecting rods, and to maintain a state in which a predetermined attracting force is applied. In other words, the connecting surfaces of the first and second concrete blocks are pressed against each other, so that the first and second concrete blocks can be firmly connected to each other. And the watertightness can be properly ensured, and the connection between the first and second concrete blocks is prevented from becoming loose even when external force is applied, and the connection state is maintained well for a long period of time. be able to.

Further, according to the coupler of the present invention, a fastening member is attached to the male thread of the first connecting rod of the first concrete block, and the guide is guided to the male thread of the second connecting rod of the second concrete block. After the member is attached, the tightening member is turned to tighten the female screw portion of the tightening member to the male screw portion of the first connecting rod, whereby a force in a direction of pulling each other toward the opposing first and second connecting rods. And the state where a predetermined pulling force is applied can be maintained, and the concrete block connection can be accurately and stably performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which divided blocks are connected according to an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is an enlarged longitudinal sectional view of the coupler and its surroundings in FIG. 1;

FIG. 4 is an exploded perspective view of the coupler shown in FIG. 1;

FIG. 5 is an explanatory diagram of a method of connecting divided blocks.

FIG. 6 is a perspective view showing a modification of the coupler shown in FIG. 1;

FIG. 7 is a longitudinal sectional view corresponding to FIG. 3, showing a modification of the coupler shown in FIG. 1;

FIG. 8 is an explanatory view of a method of filling a hardening material into a coupler.

FIG. 9 is an explanatory view of a method of filling a hardening material into a coupler.

FIG. 10 is a perspective view showing a modification of the connecting rod shown in FIG. 1;

FIG. 11 is a perspective view showing a modification of the internal reinforcing bar shown in FIG. 1;

FIG. 12 is a longitudinal sectional view corresponding to FIG. 3, showing another embodiment of the coupler;

FIG. 13 is an exploded perspective view of the coupler shown in FIG. 12;

FIG. 14 is an explanatory diagram of a method of connecting the divided blocks by the connector shown in FIG. 12;

FIG. 15 is a perspective view showing a modified embodiment of the coupler shown in FIG. 12;

FIG. 16 is a longitudinal sectional view corresponding to FIG. 3, showing a modification of the coupler shown in FIG. 12;

FIG. 17 is a longitudinal sectional view showing another embodiment of the coupler and corresponding to FIG. 3;

18 is an exploded perspective view of the coupler shown in FIG.

FIG. 19 is an explanatory diagram of a method of connecting the divided blocks by the connector shown in FIG. 17;

FIG. 20 is a longitudinal sectional view showing another embodiment of the coupler and corresponding to FIG. 3;

FIG. 21 is an exploded perspective view of the coupler shown in FIG. 20;

FIG. 22 is an explanatory diagram of a method of connecting the divided blocks by the connector shown in FIG. 20;

FIG. 23 is a longitudinal sectional view showing another embodiment of the coupler and corresponding to FIG. 3;

FIG. 24 is an exploded perspective view of the coupler shown in FIG. 23;

FIG. 25 is an explanatory diagram of a method of connecting the divided blocks by the connector shown in FIG. 23;

FIG. 26 is a longitudinal sectional view showing another embodiment of the coupler and corresponding to FIG. 3;

FIG. 27 is an exploded perspective view of the coupler shown in FIG. 26;

FIG. 28 is an explanatory diagram of a method for connecting the divided blocks by the connector shown in FIG. 26;

FIG. 29 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 30 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 31 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 32 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 33 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 34 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 35 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 36 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 37 is an explanatory diagram of a block connection method that can be used when constructing a concrete structure.

FIG. 38 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 39 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 40 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 41 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 42 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 43 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 44 is an explanatory view of a conventional block connection method.

[Explanation of symbols]

DB1, DB2: divided block, 10: internal reinforcing bar, 30
... connecting rod, 30a ... male screw part, 31 ... corrugated reinforcing member, 32 ... rod-shaped reinforcing member, 33 ... rod-shaped reinforcing member, CL ...
Center line of connecting rod, HM: hardening material, 40: recess, 90
... Coupling device, 91 ... Guide member, 91b ... Inlet, 91c
... insertion hole, 91d ... step, 91e ... nut-shaped part, 91
f: female screw hole, 92: fastening member, 92a: female screw hole, 92b: circular flange.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04B 1/06 E04B 1/06 2/02 E04C 5/08 E04C 5/08 1/10 NF term (reference ) 2D048 AA42 2D063 BA05 BA23 BA24 2E125 AA52 AA56 AA70 AA72 AA76 AE02 AE05 AF01 AG10 AG14 AG25 AG38 BA42 BB19 BB22 BB24 BB27 BB30 BD01 BF03 CA25 2E164 AA02 AA31 BA02 BA12 BA27 DA01 DA25

Claims (4)

[Claims] 1. A concrete block connecting structure formed by connecting concrete blocks to each other, wherein a first concrete block, a second concrete block, and a male screw portion provided at a tip end of the first concrete block. A first connecting rod embedded in the first concrete block so as to be exposed from the first concrete block; and a second connecting rod embedded in the second concrete block so that the male screw portion provided at the tip is exposed from the second concrete block. A male screw portion of the first connecting rod has a female screw portion to which the male screw portion can be screwed, and a circular flange for movement restriction is provided on the outer surface, and the female screw portion is screwed to the male screw portion of the first connecting rod. In this state, the fastening member arranged on the first connecting rod and the circular flange abut an insertion hole in which a portion of the fastening member other than the circular flange can be inserted with a margin from the inside. A possible inner surface step is provided at one end, and a female screw portion to which the male screw portion of the second connecting rod can be screwed is provided at the other end. A cylindrical guide member which is inserted and protruded from the insertion hole, and which is arranged on the second connecting rod in a state where a female thread is screwed into a male thread of the second connecting rod; The female screw portion of the member is fastened to the male screw portion of the first connecting rod, and the circular flange is in contact with the inner surface step of the guide member. As a result, the first connecting rod and the second connecting rod are pulled closer to the second connecting rod. A concrete block connection structure, wherein the first concrete block and the second concrete block are pressed against each other. 2. A first concrete block in which a first connecting rod is embedded so that a male screw portion at a tip thereof is exposed, and a second concrete rod in which a second connecting rod is embedded so that a male screw portion at a tip thereof is exposed. (2) A coupler used for interconnecting a concrete block with a male thread of a first connecting rod, having a female thread which can be screwed, and having a circular flange for movement restriction on an outer surface. Then, a fastening member arranged on the first connecting rod in a state where the female thread portion is screwed into the male thread portion of the first connecting rod, and a portion of the fastening member excluding the circular flange can be inserted with a margin from the inside. One end has an inner surface step at which the insertion hole and the circular flange can abut, and the other end has a female screw portion with which the male screw portion of the second connecting rod can be screwed, and the fastening member has a circular shape. The part excluding the flange is inserted into the insertion hole and protrudes from the insertion hole In it is disposed, and, and a second connecting rod of the tubular disposed in the second connecting rod in a state screwed the female screw portion in the male threaded portion guide member, coupling, characterized in that. 3. The coupling according to claim 2, wherein an insertion opening for inserting a fastening member into the guide member is formed on an outer peripheral surface of the cylindrical guide member. 4. The coupling according to claim 2, wherein the fastening member and the guide member have a portion on an outer surface with which a fastening tool can be engaged.