JPH10231551A - Connection fixture for concrete product, and its connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce total cost on assemblage by eliminating defects of conventional techniques such as complicatedness and difficulty in lap jointing of protruded reinforcement bars from two products for jointing of successive pours in thread-connecting a connection plate to an insert embedded in a connection part of a concrete product, or bolt-connecting channel metals embedded in-product end parts, save labor and reduce time in connection work, and energize fastening force more than external stress applied after connection for connecting the concrete products parted and manufactured in mass-producible simple form. SOLUTION: A device is provided with an engagement member 50 of rigid material having an inverted T-shaped cross sectional surface, which is provided with a wedge part 20 having an up-gradient 10 from a front part backward, and a fixing part 40 having a fixing means 30 to concrete above the wedge part 20, composed in such a way that the wedge part 20 can be protruded to a connection part or recessed part in concrete in placing it, and an engagement member 100 of rigid material having an H-shaped cross sectional surface in which a similar gradient 80 to that of the wedge part 20 is provided in a jaw part 75 provided to be engaged with both wedge parts 20, 20 of the engagement members 50 facing each other as connection surfaces of concrete products to be connected are applied to them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention can save labor and reduce time when connecting concrete members such as waterway blocks, retaining wall blocks, and other construction blocks, which are manufactured separately.
Provided is a concrete product connecting metal fitting and a connecting method which can be connected to a predetermined position by urging a tightening force equal to or more than a tensile stress acting after connecting the concrete product.

[0002]

2. Description of the Related Art The prior art will be described with reference to FIGS. FIG. 9 is a perspective view showing a connection fitting and a connection method for a conventional concrete product, and FIG. 9 (a) shows a state in which a waterway block, a retaining wall block, and other construction blocks manufactured by dividing and producing a factory are connected. FIG. 9 (b) shows a case where the insert 1 and the connecting plate 2 and the tightening bolt 3 which are previously buried in the connecting portion are frequently used. Then, the channel-shaped (or box-shaped) connection fitting 4 is connected to the concrete product B.
The connection fittings 4 and 4 are buried in advance in the end recesses BH to be connected such as 1 and B2, and the connection between the connecting fittings 4 and 4 is performed by tightening bolts 3 and nuts 5.

However, in the conventional connection by the insert 1 and the connection plate 2, the concrete products are merely connected without the action of pulling (pulling and tightening) the connection surfaces of the concrete products, and the installation errors and product manufacturing errors are reduced. Using the connection plate 2 provided with the long hole 2h for absorption, the connection work is complicated and time-consuming because the connection plate 2 is fixed (screwed) after pressing both the concrete products, and the connection is performed in a waterway block or the like. There was a drawback that the water leakage prevention packing pa at the end did not remain pressed, and the connection part was weak, resulting in uneven settlement and deviation after construction.

[0004] In connection with the channel-like connecting fitting 4, there is a disadvantage that the work of inserting the bolt 3 into the connection hole 4c in the narrow recess BH and tightening it with a spanner wrench or the like is complicated and requires a long time. .

FIG. 10 shows a steel bar currently used for large concrete products such as large waterways and retaining wall blocks, in which a predetermined number of inserts 1 are embedded in connection portions b1 and b2 in advance and threaded into the insert portions. D may be screwed in place of the protruding rebar, but it is frequently used to protrude in advance on both connection surfaces b1 and b2 (depending on concrete strength, usually rebar diameter φ × 30 to 40). The rebars d1 and d2 that have been extended and spliced together are connected by welding, bundling, or the like, and cast-in-place concrete Co is cast in the space K to connect the members B1 and B2. However, the production and transportation of products with protruding rebars and the connection work between the congested upper and lower protruding rebars at the site were difficult and complicated, and required many time periods for curing the joints, and the construction period was prolonged.

[0006] In the woodworking and metal fields, connection of structural members and rotating shafts has been performed using wedges or cotters at connection portions. However, in the field of concrete, connection due to brittleness of the base material has been made. (To the extent of the applicant's search).

[0007]

SUMMARY OF THE INVENTION The disadvantages of the conventional connection fittings and the connection method using the same are eliminated, and the connection portion of the product to be connected is positioned at an appropriate position, and at the same time, resistance to external stress acting on the contacting surface to be connected. Provided is a concrete product connection metal fitting and a method of connecting a concrete product using the same, by which a possible tightening force is urged to save labor and reduce time for the work.

[0008]

According to the present invention, there is provided a wedge portion having an upper surface having an upward slope from a front surface to a rear surface, as an engagement member which is previously buried in a concave portion of both concrete products to be connected, A fixing section having fixing means for concrete is provided on the upper part of the wedge section, and two substantially inverted T-shaped hard sections are provided so as to be exposed and buried by a predetermined dimension in a connecting section of a concrete product to be connected or a concave section of the connecting section. A material engaging member;
An insertion groove into which the engaging member can be inserted is opened, and a jaw having a downward slope (upper side) facing the opposite side of the insertion groove and having a downward slope (upper side) is provided in a vertically symmetrical manner, and is horizontally connected by a horizontal part. A fitting member made of a hard material having a substantially H-shaped cross section capable of urging the connecting portion with a tightening force equal to or greater than a tensile stress acting after connection by a wedge action when fitted to the engagement member; A concrete product fitting is provided which is externally fitted to the opposing engaging member by hitting or press-fitting and wedges the two members.

Further, in order to obtain a self-aligning action (alignment on the center line) when the fitting member is inserted into the upper and lower engaging members,
On the wedge surface of the engagement member and the wedge surface of the fitting member, a dihedral angle or a dihedral angle is provided or an arc shape is provided so that the above operation can be performed naturally.

Further, one of the engagement members of the connection fitting according to any one of claims 1 to 3 is provided with a plurality of radially formed fixing portions of an arbitrary shape, each of which is provided with an inclined portion at an end portion or an end portion of the fixing portion. It is provided as an engaging member having a wedge-fitting portion, and a plurality of wedge-fitting portions 20 are protruded from the connection portion of the concrete product to be connected and buried, or are protruded and buried by a predetermined size in the concave portion of the connection portion, and are assembled at the portion A plurality of other concrete products are provided so as to be collectively connected.

In addition, a locking hole is provided at an upper part of the wedge portion of the engaging member and at a horizontal portion of the fitting member so as to be connectable to a hooking claw of a hitting device or a press-fitting device. A connection metal fitting for receiving a reaction force at the time or a hook portion is provided.

A plurality of concrete products protruding by a predetermined dimension are brought into contact with the connecting surfaces of the plurality of concrete products in the recessed portions on the front side for connecting the engaging members according to any one of claims 1 to 5, and are temporarily connected to each other. The fitting member is externally fitted to the both engaging members by hitting or press-fitting, and the concrete products to be connected can be easily urged with a tightening force equal to or more than the tensile stress acting after the connection, and labor saving and time reduction can be achieved. A method for connecting concrete products is provided.

Further, in order to connect a plurality of concrete products in an orthogonal state, any one of claims 1 to 3 or 5 above.
The one engaging member described in the item is protruded from the connecting surface side of the concrete product, and the other engaging metal fitting is protruded into a concave portion on the front side of the concrete product to be connected. After the contact and the temporary connection, the fitting member is externally fitted to the opposing engagement members by hitting or press-fitting,
A method for connecting concrete products that can easily apply a tightening force equal to or greater than the tensile stress that acts after connecting both concrete products to be connected, and that can save labor and reduce time.

Further, in order to collectively connect a plurality of concrete products, the wedge portion of the one engaging member according to the fourth aspect is projected to a predetermined dimension into the plurality of connection surface sides or the recesses of the connection surface. After temporarily connecting the connecting surface of the other concrete product to be connected to the connecting surface of the concrete product, the fitting member is hit or pressed into another engaging member facing one of the engaging members. A method for connecting concrete products, wherein each of the concrete products to be fitted and connected is urged with a tightening force equal to or greater than an external stress acting after connection.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment FIGS. 1 to 8 show an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a configuration of a first embodiment according to claim 1 of the present invention;
FIG. 2 is an explanatory view showing a connection method according to the first embodiment of the present invention, FIG. 3 is a perspective view showing another embodiment 2 to 7 according to the first embodiment of the present invention, and FIG. FIG. 5 is an explanatory view of an eighth embodiment according to item 2, FIG. 5 is an explanatory view of a ninth embodiment according to claim 3 of the present invention, and FIG. 6 is an embodiment 1 according to claim 4 of the present invention.
FIG. 7 is an explanatory view of the first embodiment, and FIG.
8 is an explanatory view showing a method of connecting concrete products according to the present invention, FIG. 9 is an explanatory view of a conventional technique, and FIG. 10 is an explanatory view of another conventional technique.

An embodiment of the present invention will be described below with reference to FIGS.

Embodiment 1 FIG. 1 is a perspective view showing the configuration of Embodiment 1 of the present invention, and is joined to an engagement member 50 (two used at the time of connection) having a substantially inverted T-shaped cross section shown at the top of the figure. The engaging member 50, which is formed by a fitting member 100 having a substantially H-shaped cross section and wedge-fitted by a wedge action, and used by projecting a predetermined dimension into the concave portion BH of both connected concrete products, A plate-shaped fixing portion 40 having a fixing means 30 (ridge portion) for improving the fixing force at the time of embedding protruding around the periphery, and a wedge-attached portion 20 having a wide plate-shaped upward slope provided below the fixing portion 40 are connected. It was set up and configured.

The fitting member 100 has an insertion groove 70 in which the engaging member 50 can be inserted vertically, and a downward slope 80 is provided on the back side of the jaw 75 facing the opening groove 70 so as to be vertical. The jaw 75 is sandwiched by a horizontal portion 101 connecting the portions.
Symmetrically (upward slope 80 on the symmetric side), and an insertion section 77 (round section) is provided on the insertion side (back side) to enable smooth introduction and front / rear discrimination. Configured. Both members are made of ductile cast iron or steel or the like having excellent tensile strength and toughness.

FIG. 2 is an explanatory view of a connection method using the first embodiment of the present invention. FIG. 2 (a) shows an example in which the engaging members 50 are connected in advance at the time of manufacturing the concrete products B1 and B2 to be connected. A concrete product (hereinafter, referred to as a product) is cast into a recess BH on the front side of the front surface so as to protrude by a predetermined size (to obtain a gap g), and connection surfaces b1, b of both products B1, B2.
2 and then temporarily connected to each other.
50, a connection work in which the fitting member 100 is externally fitted by whipping or press-fitting and wedge-fitted, and the two products B1 and B2 to be connected are urged and connected with a tightening force P higher than an external stress applied after connection. Is simple, so that labor and time can be saved.

FIG. 2 (b) shows an engaging member 50 which is previously projected and protruded by a predetermined size on the front surface when one of the products B1 to be connected is manufactured, and is inserted into the recess BH on the front side of the other product B2 to be connected. After projecting by a predetermined dimension (so that the gap g is obtained), the connecting surfaces b1 and b2 of both products B1 and B2 are brought into contact and temporarily connected, and then the two engaging members 50 and 50 are opposed to each other. The fitting member 100 is externally fitted by hitting or press fitting and wedge-fitted,
In this method, the two products B1 and B2 to be connected are connected by urging a tightening force equal to or more than the external stress acting after the connection.
The basic connection method according to the present invention, which can connect the product B2 orthogonally to 1, has been described above. The range of application to the product is wide, and variations of the connection method will be described later with reference to FIG.

Embodiments 2 to 7 FIG. 3 is a perspective view showing another embodiment 2 to 7 of the engaging member according to claim 1 of the present invention. In the embodiment 2 shown in FIG.
A longitudinal groove portion 43 is provided in the fixing portion 40 of the engaging member 50B so as to correspond to the insertion of the internal reinforcing bar (wire mesh) M, and a punching shear force and other concentrated stress applied to the connection portion can be dispersed.
In the third embodiment illustrated in FIG. 3C, the fixing unit 4 of the engagement member 50C is used.
In the fourth embodiment shown in FIG. 4 (d), the reinforcing rod D is inserted through the different diameter reinforcing bar D so that the fixing force to concrete can be enhanced. Shaped steel plates ST etc. are connected by cast-in dc or screwing, etc., so that the anchoring force to concrete can be enhanced and the connection to the internal rebar can be provided.
D 'may be used, and a hook 30f indicated by a two-dot chain line may be formed above the reinforcing bar, or a fixing plate 30p may be provided to improve the fixing force. In Example 5 shown in (e),
The fixing portion 40 of the engaging member 50E is provided with a through hole 44 for enhancing the fixing force to concrete. In addition, this through hole 44
May be inserted through the inner reinforcing bar. In Example 6 shown in (f), a large number of through-holes 44 are provided in the fixing portion 40 of the engaging member 50F to be used for connection of the end of the plate product having a long span, and the end is bent into an L shape. The internal reinforcing bar M can be inserted, and the fixing force to concrete can be enhanced. (G)
In the seventh embodiment shown in FIG. 7, a large number of through-holes 44 are provided in the fixing portion 40 above the wedge attachment portion 20, and the inner reinforcing bar M whose end is bent into an L-shape can be inserted. The connection with the internal rebar is made possible, and the slope 11 is symmetrical with the ascending slope 10 from both ends t1 and t2, especially for long span connections.
Are provided so that the fitting members can be fitted from both sides of the connection portion. The connection of the products according to the above embodiment will be described later with reference to FIG.

[Eighth Embodiment] FIG. 4 shows an eighth embodiment according to the second aspect of the present invention.
The connection fitting shown in (a) has an engaging member 50H and a fitting member 1.
When the wedge is attached at the time of the engagement of 00H, the wedge surface 20a of the engagement member 50H and the inner side 75a of the jaw 75 of the engagement member 100H respectively have the same dihedral angle ca (3 to 10 degrees of loose V-shape).
, And the same gradient 80 as described above was provided on the upper surface of the wedge attachment portion 20 and on the back surface of the jaw portion 75 of the fitting member. In addition, what is indicated by a leader line in the lower part of the figure is a dihedral angle cb of the same angle
The upper and lower engaging members 50H (50H ') are used for both the former and the latter in use.
Are set on the concrete manufacturing form at predetermined intervals g on the same axis CL.

FIG. 4B is an explanatory view of the operation. When the upper and lower engaging members 50H, 50H (or 50H ', 50H') are on the axis CL at a predetermined position, the fitting member 100B or 100B 'is inclined. (Upper figure) or right and left (lower figure), even if the fitting is performed, the contact surface t receiving a tensile load due to the dihedral angle ca or the dihedral angle cb and the gradient (in the depth direction) according to the progress. Slides toward the center side and the gap k comes into contact, and naturally moves on the axis CL of the upper and lower engagement fittings (on the line of axial force of tensile stress) as shown in the right figure to move the fitting member 100H or 100H '. The load applied to the jaw 75 is made equal left and right.

Ninth Embodiment FIG. 5 is a perspective view of a ninth embodiment of an engaging member according to a third aspect of the present invention. The engaging member 50I has a wide upward slope 10 below the fixing section 40. A wedge portion 20 having a substantially arc-shaped cross section (concentric arc) is provided. According to this structure, even if the fitting member 100I is inclined or shifted left and right, the fitting member 100I moves upward and downward because of the arc-shaped engagement and the gradient (in the depth direction) as in the eighth embodiment. Axis line CL of engagement bracket
The load naturally moves upward (on the line of the axial force of the tensile stress), and the load applied to the jaw 75 of the fitting member 100I becomes equal to the left and right.

[Embodiment 10] FIG. 6 is an explanatory view showing Embodiment 10 of the present invention. The engagement member 50J shown in FIG. 6 is a locking means 45 that receives a reaction force by engaging with a schematically illustrated hitting (hitting) or locking claw portion N1 of a press-fitting device when the fitting member is inserted or removed. The locking claw portion N2 is located just above the wedge portion 20 and near the front end of the horizontal portion 101 of the fitting member 100J.
And a connecting hole for a concrete product corresponding to the removal of the fitting member 100J.

With the above construction, the engagement member 5
0J reaction force receiving hole 45h or fitting member 10
The engaging hole 101h of the 0J is engaged with an engaging claw N1 of a device to be described later, and the fitting member can be easily fitted with a pneumatic hammer, an electric hammer (by an electromagnetic solenoid) by hitting, or a press-fitting device using a hydraulic cylinder. The fitting operation can save labor and time in connection work. Also, the fitting member 1
00J, the locking hole 101 of the horizontal portion 101
If h is engaged with the engaging claw N2 of the device, it can be easily removed in a short time.

[Embodiments 11 to 14] FIG. 7 is a view showing Embodiments 11 to 14 according to claim 5 of the present invention, wherein one of the engagement members of the connection fitting according to claims 1 to 3 is An engagement member having the wedge portion 20 with the gradient 10 is provided at each end or an end of the fixing portion 40 having an arbitrary shape formed in a plurality of radial directions or an end except a part 24,
A plurality of wedges 20 are connected to the connection of the concrete product to be connected
Is protruded and embedded in the recessed portion of the connection portion so as to protrude by a predetermined dimension, and a plurality of other concrete products assembled in the portion are provided so as to be collectively connectable.

The eleventh embodiment (k) to the thirteenth embodiment (m) and the fourteenth embodiment (not shown) will be described below with reference to FIG. The eleventh embodiment shown in (k) is an engagement member 50K in which the wedge portions 20 provided with the gradients 10 above and below the fixing portion 40 are provided vertically symmetrically, and the connection portion of the product B1 to be connected or the concave portion BH thereof is connected. The wedge portion 20 of the engaging member 50K is protruded by a predetermined size into the inside, and the wedge portion 20 of the wedge member 50 is protruded by a predetermined size into the concave portion BH of the product B2 or the like to be connected. The fitting members 100 are fitted into the fittings 20, 20, so that the two products B1, B2 can be connected to each other. Example 1 shown in (l)
2 is for connecting a plurality of products to the product B1;
An engaging member 50L provided with book fixing portions 40 radially, the wedge attaching portion 20 is provided at an end of each fixing portion 40, and a plurality of products can be connected to a columnar or plate-shaped product B1 on a horizontal plane or a vertical plane. Provided. In the thirteenth embodiment shown in (m), in order to connect a plurality of products to the product B1, each of the fixing units 40L is provided with an engaging member 50L in which four fixing units 40 are radially provided.
The wedge attachment portion 20 is provided at the end of the
A plurality of products were provided so as to be connectable in a horizontal plane or a vertical plane. Similarly, in order to connect a plurality of products, a plurality of fixing portions 40 are radially provided, and the wedge portion 20 is attached to an end of each fixing portion 40 except for an end or a part 24 with an engaging member 50L. A plurality of products were provided on the columnar or plate-like product B1 so as to be connectable on a horizontal plane or a vertical plane. The shaded portion mo of the concave portion BH in the figure is a mortar for corrosion protection filled after connection. Next, a fourteenth embodiment will be described with reference to the above (l) and (m) drawings. In this embodiment, a plurality of fixing portions 40 are provided radially and a part 24 of the end portion thereof (shown by a chain line circle). The engaging member 5 provided with the wedge portion 20 except for
0N is buried and buried in the end portion or the connection portion of the product, and another product to be connected is connected to the projecting wedge portion 20 to construct various structures.

FIG. 8 is an explanatory view showing an embodiment of a method for connecting products according to the present invention.
0B to 50M, etc.), and wedge-bonding portions 20 are projected into the connection surfaces of the plurality of concrete products B1, B2─B4, B5, etc. to be connected in advance or the recesses BH on the connection surface side by projecting by a predetermined size. And connection work of a horizontal surface, a vertical surface, and a curved surface combined with the horizontal surface or the vertical surface. Next, various connection methods will be described.

Hereinafter, various connection methods will be described with reference to FIG. (O) shows a connection method to which the present invention is applied. Since it is heavy and difficult to manufacture and transport, it is divided into upper and lower culvert blocks B1 and B2, and the products B1 and B2 are separated. The engagement fitting of the present invention is buried in the recess of each connection part and manufactured, and the fitting member is fitted into the opposite engagement members of both products temporarily connected at the factory or site by hitting or press-fitting, and water leakage occurs. The packing pa for prevention can be pressed and easily connected in a short time, and after connection, the product is connected by urging a tightening force equal to or more than the external stress acting on the product. It should be noted that the product is divided not only vertically but also vertically and horizontally, etc., so that a large-sized product can be assembled with simple-shaped unit members having good production efficiency. (P) shows a connection method to which the present invention is applied. A retaining wall block which is difficult to manufacture and transport is separated into a retaining wall block body B1 and an extended bottom plate B2, and is factory-produced. Connect in the same way as above. Compared to those using protruding rebars, manufacturing is simpler, labor and time for connecting work can be reduced, and the construction period can be significantly reduced. (Q) shows a connection method to which the present invention is applied.
The engaging member is buried in the connection part of the medium-sized culvert block at the same time as the production, so that labor can be saved and the connection work time can be shortened, and uneven settlement and displacement after construction can be prevented. (R) shows a connection method to which the present invention is applied. The conventional connection method is a connection on the same plane. In this connection, an inverted L-shaped connection is formed on the vertical surface of the retaining wall block. This is a connection method for connecting the horizontal portions of the waterway block in an orthogonal state, and the operation and the like are the same as those described above, but can be applied to various products by a similar method. (S) shows a method of connecting a columnar product and a plate-like wall body to which the present invention is applied, which facilitates construction of a large underground water reservoir, rainwater storage tank, or other structures such as civil engineering and buildings. it can.
(T) shows a method of connecting a plate-shaped (flat) product to which the present invention is applied, and connects simple-shaped unit members B1, B2, B3 and the like in which an engaging member is embedded at an end of the product. This facilitates a large-area flat plate structure. Also, a disposable permanent formwork or the like used for repairing and constructing structures such as civil engineering and architecture can be made.

[0030]

When the present invention is applied, the product is divided into a simple shape, the manufacturing form is simplified, and the mounting of a large number of protruding reinforcing bars on the form, which has been difficult, is eliminated. The time occupied area can be reduced, the production efficiency can be improved, labor can be saved and time can be reduced, and the risk of injury due to the protruding rebar can be prevented. In addition, since there is no protruding rebar for unloading / loading from / into the production plant and loading / unloading to the site, work can be performed smoothly and smoothly, saving labor and reducing time. Can be buried immediately after installation of a waterway / retaining wall block, etc., and since there is no splicing at the site, there is no need for a curing period and it can be laid easily, and the tightening force exceeding the external stress acting on the product after connection Since the connection is urged and strongly connected, unequal settlement / shift of the connected product can be prevented, and a large product divided and produced can be easily assembled.

As described above, there is a great effect that the investment is reduced by simplifying the formwork structure, the production is easy because the protruding rebar is not required, the transportation is easy, the connection work is short, the construction period can be shortened, and the total cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a first embodiment according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a connection method according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing another embodiment 2 to 7 according to claim 1 of the present invention.

FIG. 4 is an explanatory diagram of Embodiment 8 according to claim 2 of the present invention.

FIG. 5 is an explanatory diagram of a ninth embodiment according to claim 3 of the present invention.

FIG. 6 is an explanatory view of Embodiment 10 according to Claim 4 of the present invention.

FIG. 7 shows Embodiments 11 to 1 according to claim 5 of the present invention.
FIG.

FIG. 8 is an explanatory view showing a method of connecting concrete products according to the present invention.

FIG. 9 is an explanatory diagram of a conventional technique.

FIG. 10 is an explanatory diagram of another conventional technique.

[Explanation of symbols]

 B1, B2, etc. {divided and manufactured concrete product b1, b2, etc.} connecting surface of concrete product to be connected BH {recessed portion (provided at the connecting portion of product) 10} ascending slope 20} wedge portion 30} fixing means 40 ° fixing portion 45 ° locking means 45h locking hole 50 ° engagement member 50B engagement member embodiment 2 50C engagement member embodiment 3 50D engagement member embodiment 4 50E engagement Example 5 of member 5F Example of engaging member 6 Example of 50G engaging member 7 Example of 50H engaging member 8 Example of 50I engaging member 9 Example of 50J engaging member 10 of engaging member Example of 50K engagement member 11 Example of 50L engagement member 12 Example of 50M engagement member 70 70 Insertion groove 75 Jaw 77 Introducing portion 80 Incl. Symmetrical) 100 ° fitting member 100H fitting portion (To engage the engaging member 50H) 100I─ fitment (engages the engagement member 50I) 100J─ fitment (engages the engagement member 50J) 101─ horizontal portion 101h─ locking hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16B 5/06 E04B 1/60 503B 504C 505A

Claims (8)

[Claims] 1. A connection fitting for wedge-connecting an uneven member by a wedge action, wherein a wedge-attached part 20 having an upper surface provided with an upward slope 10 from a front part to a rear part.
Fixing means 30 for concrete on the wedge attachment portion 20
Two wedge-shaped portions 20 are provided in the connecting portions of the respective concrete products to be connected or the recessed portions BH thereof so as to protrude by a predetermined size so as to be buried therein, and are provided in such a manner that they can be embedded. An engaging member 50 made of a hard material, and an insertion groove 70 into which the engaging member 50 can be inserted symmetrically in the vertical direction.
A jaw 75 that can be engaged with the wedge portion 20 is protruded on both sides of the insertion groove 70, and the same gradient 80 as the wedge portion is provided on the inner surface of the jaw 75 in the depth direction. Engaging member 5
A fitting member 100 made of a hard material having a substantially H-shaped cross section which can be fitted and connected to the outside at 0, 50 is provided. The fitting member 100 is fitted over the facing engaging members 50, 50 by hitting or press-fitting. A connection fitting for a concrete product, wherein a connection is made by urging a fastening force P higher than an acting external stress. 2. The wedge of the engaging member 50, when the upper and lower engaging members and the fitting member are fitted, so that the fitting member naturally moves on the center line and the load applied to the jaw 75 is equalized in the right and left directions. An engaging member 50H and a fitting member 100 having a dihedral angle ca or a dihedral angle cb provided on the fitting surface and the inner surface of the jaw 75 of the fitting member 100.
The connection fitting according to claim 1, wherein the connection fitting is H. 3. When the upper and lower engaging members and the fitting member are fitted, the fitting member naturally moves on the center line, and the load applied to the jaw is left and right evenly. Face 20
3. The connection fitting according to claim 1, wherein the connection member is an engagement member 50 </ b> I and a fitting member 100 </ b> I in which a and the inner surface of the jaw 75 of the fitting member 100 are provided in an arc shape. 4. 4. One of the engaging members is provided on an upper surface of each of a plurality of fixing portions 40 having an arbitrary shape and having fixing means 30 for fixing to concrete, excluding respective ends or portions thereof. An engaging member provided with a wedge portion 20 having an upward slope 10 from a front portion to a rear portion, and the wedge portion 20 protrudes by a predetermined dimension so as to be buried in a connection portion of a concrete product to be connected or a concave portion BH thereof. 4. The method according to claim 1, wherein:
A connection fitting for a concrete product according to any one of the preceding claims. 5. A locking means 45, which is a reaction force receiving portion for a striking or press-fitting device when the fitting member is fitted or removed, is provided near the wedge fitting portion 20. An engaging member 50J and a fitting member 100J provided on the horizontal portion 101
The connection fitting for a concrete product according to any one of claims 1 to 4, wherein: 6. A connecting method for wedge-connecting an uneven member by a wedge action, wherein the engaging member of the connecting fitting according to any one of claims 1 to 5 is provided in a connecting portion or a recessed portion BH thereof. Both concrete products B1 and B in which the wedge portion 20 is projected so as to project a predetermined dimension.
After the two connecting surfaces b1 and b2 are abutted and temporarily connected, the fitting member is externally fitted to the opposing engaging members by hitting or press-fitting, and the concrete products B1 and B2 to be connected act after connection. A method for connecting concrete products, wherein the connection is performed by applying a tightening force equal to or more than an external stress. 7. A connection method for wedge-connecting an uneven member by wedge action, wherein the engaging member of the connection fitting according to any one of claims 1 to 4 is inserted into a connection portion or a recess BH thereof. Bonding of another concrete product B2, which is formed by projecting the wedge portion 20 into the recessed portion BH of the connection portion and projecting the wedge portion 20 into the recessed portion BH of the concrete product B1 which is cast by projecting the wedge portion 20 by a predetermined size. After the surfaces b2 are abutted and temporarily connected to each other, the fitting member is externally fitted to the opposing engaging members by hitting or press-fitting, and a tightening force equal to or more than the external stress applied after the connection is applied to urge the two concrete members. A method for connecting concrete products, wherein the products B1 and B2 are connected in an orthogonal direction. 8. A connection method for wedge-connecting an uneven member by wedge action, wherein the engagement member of the connection fitting according to claim 4 is formed by projecting a wedge part 20 to a plurality of connection parts by a predetermined dimension. Connection surface b1 of cast concrete product B1 and wedge portion 2 in recess BH
0, projecting a predetermined dimension, and contacting the connection surfaces b2, b3, etc. of other concrete products B2, B3 etc., and temporarily connecting them. Then, the fitting members are externally fitted to both engagement members by hitting or press fitting. Concrete products B1, B2, B to be connected
3. A method of connecting concrete products, wherein the connecting is performed by urging a tightening force equal to or more than an external stress acting after connecting 3 and the like.