JP3860905B2 - Metal fitting for connecting rod-shaped materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, for example, the length of a steel bar called a “separator” for holding a space between opposed formwork panels used for supporting a concrete placement formwork can be adjusted according to the form of the formwork. Therefore, the present invention relates to a bar-shaped metal fitting for use in which a separator divided into two parts is used for the purpose of connecting to an arbitrary extension length.
[0002]
[Prior art]
FIG. 11 is a partial top view showing an assembled state of a mold for placing a wall body whose thickness gradually increases (decreases) from one end to the other end.
In this case, the two form panels 50, 50 that form the placement space are not arranged in parallel, but one of them is opposed to the other in an oblique direction.
Therefore, as can be understood from the drawing, the multiple separators 51 for interposing the formwork panels 50 and 50 in a dotted manner to withstand the filling pressure of the concrete have various lengths. Things are needed.
[0003]
Therefore, in the past, a large number of anchoring separators 51a that are somewhat longer than half the length of the separator 51 are prepared and two anchoring separators 51a are arranged in a desired arbitrary manner as shown in FIG. A method has been employed in which the connecting side ends are bundled so as to have an additional length, and the bundled portions are connected via the connecting metal fitting 60 shown in FIG.
In the figure, reference numeral 52 denotes a cup for maintaining a space between the two formwork panels 50 and 50.
[0004]
The structure of the conventional connecting metal fitting 60 will be described. A flat short cylindrical body having a shape that can be externally fitted to the bundled portion is used as a main body 61, and a long nut 62 welded vertically to the center of the flat top surface. The fastening bolt 63 shorter than the length is screwed.
At the lower end of the fastening bolt 63, a wedge 64 is rotatably connected or dropped, and at the center of the top surface of the main body 61, a through hole 65 through which the tip of the wedge 64 is inserted is provided.
[0005]
The connecting metal fitting 60 is used in a state where the fastening bolt 63 is screwed up, and from both ends of the main body 61, the connecting side ends of the two connecting separators 51a and 51a are respectively inserted and bundled. By adjusting the thickness, the separator 51 having a desired extension length is obtained.
Thereafter, when the fastening bolt 63 is screwed in, the leading end of the wedge 64 is interrupted between the two bundled separators 51a as shown in FIG.
Thus, the two connection separators 51 a are integrally connected via the connection fitting 60.
[0006]
[Problems to be solved by the invention]
However, the conventional connecting metal fitting 60 has many problems to be improved as listed below.
(A) It is difficult to obtain a sufficient connection strength by a connection method using a wedge.
(B) A welding technique for welding the long nut 62 to the main body 61 is required.
(C) The welding process has low productivity, the working environment is bad, and the connection strength tends to vary.
(D) The operation of inserting the anchoring separators 51a into both ends of the main body 61 is difficult to perform in a narrow mold and is inefficient.
(E) By incorporating a wedge, the outer shape of the connecting metal fitting 60 must be increased in order to compensate for the lack of connection strength.
[0007]
Therefore, the main object of the present invention is to provide a press that has sufficient connection strength for connecting the separators used for supporting the concrete casting formwork, and that is excellent in productivity and homogeneity without welding. The object of the present invention is to provide a bar-shaped metal fitting that can be efficiently mass-produced by plastic working such as molding and forging, and that can be easily connected at a construction site.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the metal fitting for connecting the rod-shaped material according to the present invention is:
In a state where the respective connecting side ends of the two rod-shaped members are bundled over an arbitrary length, this bundled portion is for fastening and binding,
A rod receiving member 1 having a box shape with an open top surface, provided with fitting portions 5 for fitting the bundled portions into one of the opposing side walls 1a, 1a, and a bolt hole 6 on the bottom surface 1c;
Forming a box shape with an open top surface, the width of the opening a is slightly wider than the diameter of the rod-shaped material B on one of the opposing side walls 2a, 2a, and the two rod-shaped materials B are bundled side by side on the flange portion. A fastening notch 8 having a widened portion b that can be accommodated is provided, a bolt hole 10 is provided on the bottom surface 2c, and a fastening member 2 having a size that can be polymerized inside the rod receiving member 1,
In the superposed state, the fastening bolt 3 inserted through the bolt holes 6 and 10 from the inside and the nut 4 screwed to the protruding end thereof,
In addition, the other opposing side walls 2b, 2b of the tightening member 2 are each provided with a protrusion 9 that interferes with the other opposing side wall 1b of the rod receiving member 1 as the nut 4 is tightened. Features.
And it is good to form the both-sides end of the widening location b in the V shape of the horizontal direction, and to be the clamping location c of the rod-shaped material B.
In addition, a substantially chevron-shaped protrusion 5 a may be provided in the center of the bottom of the fitting portion 5.
Alternatively, the tightening member 2 may omit the other opposing side wall 2b, and the protrusions 9 may be provided at both end portions of the one opposing side wall 2a.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
The rod-shaped material B (see FIG. 1) of this embodiment plays a role of fixing the facing distance between two placed formwork panels when constructing a formwork for placing a wall of a concrete structure or the like. It is used as a separator.
[0010]
As can be understood with reference to FIG. 11, a very general separator configuration is formed by cutting male screws to screw a mold fastening bracket (not shown) at both ends of a steel bar longer than the thickness of the mold, A cup 52 for holding the opposing spacing of the formwork panel is assembled to the inside portion.
The rod-shaped material B has such a form that the separator is divided into two in the middle in the longitudinal direction.
[0011]
As shown in FIG. 1 and FIG. 2, the connecting bracket A of this embodiment has two rod-shaped members B in a state where their connecting side ends are bundled over an arbitrary length. It plays the role of connecting the “bundles”.
[0012]
As shown in FIG. 1 and FIG. 2, the general structure of the metal connecting bracket A is a box-shaped rod receiving member 1 having an open top surface and a box shape having the same open top surface. A fastening member 2 of a size that can be fitted inside the rod receiving member 1, and a fastening bolt 3 that penetrates the bottom surfaces of both members 1 and 2 in the fitted state from the inside to the outside, The nut 4 is screwed to the penetrating end.
[0013]
The detailed structure of these constituent members will be sequentially described below.
As shown in FIGS. 3 to 5, each of the box-shaped rod receiving members 1 includes fitting portions 5 having shapes that allow the above-mentioned bundled portions to be completely fitted into one of the opposing side walls 1 a and 1 a. It is provided in a notch shape.
At the center of the bottom surface of the fitting portion 5, a chevron-shaped protrusion 5a corresponding to a substantially V-shaped dent formed on the outer periphery of the bundled portion is provided.
[0014]
A bolt hole 6 through which the fastening bolt 3 is inserted is provided in the middle of the bottom surface 1 c of the rod receiving member 1.
Further, an annular protrusion 7 that goes around the hole edge of the bolt hole 6 is provided on the outer surface of the bottom surface 1 c to serve as a seat for the nut 4.
And the thick part 1d for reinforcement is provided in the upper edge of the other opposing side wall 1b.
[0015]
Next, the box-shaped fastening member 2 shown in FIGS. 6 to 8 faces the opposite side walls 1a and 1a in a state of being fitted inside the rod receiving member 1 as shown in FIG. A fastening notch 8 is provided in each of the opposing side walls 2a, 2a for sequentially pushing the two rod-shaped members B one by one.
[0016]
As shown in FIG. 6, the fastening notch 8 is formed in a substantially V-shaped notch from the upper edge of the opposing side wall 2 a, and the width of the opening a is slightly smaller than the diameter of the rod-shaped material B. The widened portion b is formed in the collar portion so that the two rod-shaped members B, B can be bundled side by side.
Then, both side portions of the widened portion b are respectively formed in a lateral V-shape to serve as a fastening portion c of the rod-shaped material B.
[0017]
As the fastening member 2 is fitted inside the rod receiving member 1 at the respective upper edge portions of the other opposed side walls 2b, 2b of the clamping member 2, the other opposed side wall 1b of the rod receiving member 1 is placed. , 1b is provided with a protrusion 9 having a predetermined protrusion degree that interferes with the inner wall surface, and is formed by a method of refracting the upper edge of the opposite side wall 2b outward.
A bolt hole 10 through which the fastening bolt 3 is passed is provided in the middle of the bottom surface 2 c of the fastening member 2. 3a is the head of the fastening bolt 3.
[0018]
Next, a method of adding two rod-shaped members B and B to a desired arbitrary length using the connecting metal A will be described with reference to FIGS.
At the time of shipment of the connecting metal fitting A, as shown in FIG. 9, the rod receiving member 1 and the fastening member 2 that is half-fitted into the inner space thereof are combined by the fastening bolt 3 and the nut 4.
[0019]
Therefore, at the time of use, the two rod-like members B and B to be connected are bundled and held at their respective connection side ends so as to have the required length of addition, and one by one is shown in FIG. As shown, it is sequentially pushed into the fastening cutout 8.
Then, the pushed-in two rod-shaped materials B and B are guided by the chevron-shaped protrusion 5a provided in the fitting portion 5, and are accommodated in a state of being lined up side by side at the widened portion b as shown in the figure.
[0020]
At this time, as shown in FIG. 9, the tightening member 2 is in a state in which the protrusion 9 provided on the upper edge of the opposing side wall 2 b is hooked on the upper edge of the opposing side wall 1 b of the rod receiving member 1. is there.
Therefore, when the nut 4 is tightened with a spanner or the like to completely pull the tightening member 2 into the inner space of the rod receiving member 1, the tightening member 2 is forcibly forced by the strong tightening force. It will be drawn into the inner space of the rod receiving member 1.
When the nut 4 is tightened, the connecting bracket A and the bar B may be turned upside down so that the nut 4 can be easily tightened.
[0021]
Accordingly, each opposing side wall 2b of the fastening member 2 protrudes outward at the upper edge thereof, and the protrusion 9 interferes with the reinforced opposing side wall 1b of the rod receiving member 1, thereby pushing inwardly. Be done.
Therefore, the lateral width of the fastening notch 8 is forcibly narrowed as shown in FIG.
[0022]
Accordingly, as shown by the arrows in FIG. 10, the lateral width of the widened portion b is also narrowed, and the vertical corners of the V-shaped tightening portions c are narrowed.
For this reason, the bundled portions of the two rod-shaped members B, B that are accommodated in the widened portion b are strongly sandwiched between the left and right V-shaped fastening portions c, c, and each Even between the two V-shaped edges of the tightening point c, it is strongly clamped.
[0023]
Thus, the connecting bracket A integrally connects the bundled portions of the two rod-shaped members B and B with a much stronger tightening force than the conventional connecting bracket 60 described at the beginning.
[0024]
The tightening member 2 may not be box-shaped but may be formed in a U-shaped bracket shape in which the other opposing side walls 2b and 2b are at least partially omitted. In that case, the protrusion 9 protrudes outward at both end portions of the one opposing side wall 2a.
[0025]
【The invention's effect】
As is apparent from the above description, the bar-shaped metal fittings according to the present invention have excellent practical effects as listed below, compared to the conventional metal fittings shown in FIG.
(A) A much greater connection strength can be obtained from the fastening mechanism.
(B) The productivity is low, the working environment is poor, and the welding strength is likely to vary.
(C) Mass production can be efficiently achieved by plastic working with excellent productivity and homogeneity.
(D) The operation of fitting the connecting side ends of the two rod-shaped members into the connecting metal fittings can be performed very efficiently because they are not inserted from both ends as in the prior art, but are dropped from above.
(E) Moreover, it can work easily even in a narrow formwork.
(F) It is not necessary to incorporate a fastening wedge, and since the fastening force is strong, the outer shape of the connecting bracket can be made compact accordingly.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a partial perspective view showing a state in which two rod-shaped members are connected via a connecting metal fitting.
2 is a back side view of FIG.
FIG. 3 is a longitudinal sectional view of the rod receiving member.
FIG. 4 is a plan view of the rod receiving member.
FIG. 5 is a perspective view of the rod receiving member as seen from the bottom side.
FIG. 6 is a longitudinal sectional view of the fastening member.
FIG. 7 is a plan view of the tightening member.
FIG. 8 is a perspective view of the fastening member as seen from the bottom side.
FIG. 9 is a longitudinal sectional view of the connecting metal fitting showing a state in which the bundled portions of the two rod-shaped members have been fitted into the fastening member.
FIG. 10 is a longitudinal sectional view of the connection fitting in a state where the nut is completely tightened and connected.
FIG. 11 is a partial plan view showing a state in which a separator is assembled to a casting form of a concrete wall whose thickness gradually increases (decreases) from one end to the other end.
FIG. 12 shows a conventional example and is a perspective view of a connecting metal fitting.
FIG. 13 is an explanatory diagram of a connecting operation.
[Explanation of symbols]
A Connecting bracket B Rod-like material 1 Rod receiving member 2 Tightening members 1a, 2a One opposing side wall 1b, 2b The other opposing side wall 1c, 2c Bottom 1d Thick part 3 Fastening bolt 3a Head 4 Nut 5 Fitting part 5a Protrusions 6, 10 Bolt hole 7 Annular protrusion 8 Fastening notch 9 Protrusion a Open b Widening area c Tightening area 50 Formwork panel 51 Separator 51a Separation separator 52 Cup 60 Connecting bracket 61 Main body 62 Long nut 63 Fastening bolt 64 Wedge 65 Through hole

Claims (4)

In a state where the respective connecting side ends of the two rod-shaped members are bundled over an arbitrary length, this bundled portion is for fastening and binding,
A rod receiving member 1 having a box shape with an open top surface, provided with fitting portions 5 for fitting the bundled portions into one of the opposing side walls 1a, 1a, and a bolt hole 6 on the bottom surface 1c;
Forming a box shape with an open top surface, the width of the opening a is slightly wider than the diameter of the rod-shaped material B on one of the opposing side walls 2a, 2a, and the two rod-shaped materials B are bundled side by side on the flange portion. A fastening notch 8 having a widened portion b that can be accommodated is provided, a bolt hole 10 is provided on the bottom surface 2c, and a fastening member 2 having a size that can be polymerized inside the rod receiving member 1,
In the superposed state, the fastening bolt 3 inserted through the bolt holes 6 and 10 from the inside and the nut 4 screwed to the protruding end thereof,
In addition, the other opposing side walls 2b, 2b of the tightening member 2 are provided with protrusions 9 that interfere with the other opposing side walls 1b, 1b of the rod receiving member 1 as the nut 4 is tightened. Metal fitting for connecting rod-shaped materials characterized by The metal fitting for connecting rod-shaped members according to claim 1, wherein both side ends of the widened portion b are formed in a lateral V shape to form a tightening portion c of the rod-shaped material B. 3. The rod-shaped connecting bracket according to claim 1 or 2, wherein a substantially chevron-shaped projection 5a is provided at the center of the bottom of the fitting portion 5. The said fastening member 2 omits said other opposing side wall 2b, and the said protrusion 9 was provided in the both-sides edge part of said one opposing side wall 2a, The Claim 1 thru | or 3 characterized by the above-mentioned. Metal fitting for connecting rod-shaped materials.

Images