JPH11264242A - Connecting metal fitting of bar-shaped material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve connecting strength, convenience in use and mass productivity of a connecting metal fitting of bar-shaped materials used to add a separator to be used for timbering of a concrete placing form. SOLUTION: This connecting metal fitting is provided with a bar receiving member 1 having the top surface formed in an opening box shape and having the fitting part 5 to fit a bundled place to add to bar-shaped materials on one opposed side wall, a fastening member 2 having the top surface formed in an opening box shape, having the fastening cutout part 8 having an expanded width place (b) having almost V-shaped both side ends to laterally arrange/house two bar-shaped materials in the inmost part of an opening (a) slightly wider than a diameter of the bar-shaped materials on one opposed side wall and having the size superposable on the inside of the bar receiving member 1, a fastening bolt 3 and a nut 4 penetrating outward through the bottom surface of both members in this superposed state. The projecting part 9 to interfere with the other opposed side wall of the bar receiving member 1 according to fastening of the nut 4, is arranged on the other opposed side wall 2b of the fastening member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, the length of an iron bar called a "separator" for maintaining a space between opposed form panels used for supporting a formwork for concrete casting. The present invention relates to a rod-shaped connecting metal fitting used for connecting a separator divided into two parts to an arbitrary extension length so as to be able to be adjusted according to the following conditions.

[0002]

2. Description of the Related Art FIG. 11 is a partial top view showing an assembled state of a formwork in which a wall whose thickness gradually increases (decreases) from one end to the other end is cast. In this case, the two form panels 50, 50 forming the casting space are not arranged side by side, but one of them is obliquely opposed to the other. For this reason, a large number of separators 51 that are laid between the two formwork panels 50 and 50 in an interspersed manner to withstand the filling pressure of concrete, as can be understood from the figure,
Various lengths are required.

[0003] Therefore, conventionally, a large number of tread separators 51a, which are slightly longer than half the length of the separator 51, are prepared and placed, and two tread separators 51a are arranged as shown in FIG.
As shown in FIG. 1, a method is adopted in which the connection side ends are bundled together so as to have a desired arbitrarily added length, and the bundled portions are connected via the connection fitting 60 shown in FIG. Came. Reference numeral 52 in the figure denotes a cup for maintaining the interval between the two formwork panels 50,50.

[0004] The structure of this conventional connection fitting 60 will be described. A flat short cylindrical body having a shape capable of being fitted to the above-mentioned bundled portion is formed as a main body 61, and the main body 61 is vertically welded to the center of the flat top surface. The nut 62 has a fastening bolt 63 shorter than its length.
Is screwed in. At the lower end of the fastening bolt 63, a wedge 64 is rotatably connected or dropped,
At the center of the top surface of the main body 61, a through hole 65 is provided for inserting the tip of the wedge 64.

[0005] The connection metal fitting 60 is used for the fastening bolt 6.
3 is screwed up, the connecting side ends of the two connecting separators 51a, 51a are inserted from both ends of the main body 61, respectively, and bundled, and the length of the bundling portion is adjusted to obtain a desired adding part. The separator 51 has a length. Then, when the fastening bolt 63 is screwed in, the tip of the wedge 64
As shown in FIG. 13, a wedge effect is generated by breaking between two bundled foot separators 51 a. Thus, the two separators for extension foot 51a are integrally connected via the connection fitting 60.

[0006]

However, the conventional connection fitting 60 has many disadvantages to be improved as listed below. (A) It is difficult to obtain a sufficient connection strength by the connection method using a wedge. (B) A welding technique for welding the long nut 62 to the main body 61 is required. (C) Welding has low productivity, poor working environment,
The connection strength tends to vary. (D) It is difficult and inefficient to insert the foot separators 51a into both ends of the main body 61 in a narrow mold. (E) Incorporating a wedge and compensating for the lack of connection strength, the outer shape of the connection fitting 60 must be increased.

Accordingly, a main object of the present invention is to provide a separator having a sufficient connection strength for connecting separators used for supporting a concrete casting formwork, and to improve productivity and homogeneity without welding. An object of the present invention is to provide a bar-shaped metal fitting for a bar-shaped material which can be efficiently mass-produced by excellent plastic working such as press forming and forging, and can be easily connected at a construction site.

[0008]

In order to achieve the above-mentioned object, a connecting member for a bar-shaped member according to the present invention binds the connecting side ends of two rod-shaped members over an arbitrary length. In this state, it is for tightening and binding this bundled part,
It has a box shape with an open top surface, and has one of the opposed side walls 1a,
1a is provided with a fitting portion 5 for fitting the bundled portion, and a rod receiving member 1 having a bolt hole 6 provided on a bottom surface 1c, and a box-like member having an open top surface, and one of opposing side walls 2a, 2a.
In addition, the width of the opening a is slightly wider than the diameter of the bar-shaped material B, and a widened portion b in which two bar-shaped materials B can be bundled side by side in the inner part.
Each of the fastening notches 8 is provided with a bolt hole 10 in the bottom surface 2c. The fastening member 2 is large enough to overlap the inside of the rod receiving member 1. A fastening bolt 3 inserted from the inside into the bolt holes 6 and 10 and a nut 4 screwed to a protruding end thereof are provided, and the other opposing side walls 2 b and 2 b of the fastening member 2 are provided with the nut 4 A feature is provided in that the projections 9 that interfere with the other opposing side wall 1b of the rod receiving member 1 are provided with the tightening.
Then, it is preferable that both ends of the widened portion b are formed in a laterally V-shape so as to be a tightening portion c of the bar B. In addition, fitting part 5
It is preferable to provide a substantially mountain-shaped projection 5a at the center of the bottom of the projection. Alternatively, the fastening member 2 eliminates the other opposing side wall 2 b and
May be provided at both ends of one of the opposed side walls 2a.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The bar-shaped material B of this embodiment (see FIG. 1) plays a role in fixing a facing distance between two opposing formwork panels when constructing a formwork for placing a wall of a concrete structure or the like. It is used as a separator.

An extremely common separator configuration is shown in FIG.
As can be understood by referring to FIG. 1, at both ends of an iron bar longer than the thickness of the formwork, external threads for screwing a formwork fastener (not shown) are cut. A holding cup 52 is assembled. The rod-shaped material B has such a form that the separator is divided into two in the middle in the longitudinal direction.

As shown in FIG. 1 and FIG. 2, the connecting bracket A of this embodiment is a state in which two rod-shaped members B are bundled together at an arbitrary length at respective connecting side ends. , This “bundling point”
It plays the role of connecting.

As shown in FIG. 1 and FIG. 2, the schematic structure of the metal connecting fitting A is a box-shaped rod receiving member 1 having an open top surface, and a box having an open top surface. A fastening member 2 having a shape that can be fitted into the inside of the rod receiving member 1 and fastening bolts that penetrate the bottom surfaces of both members 1 and 2 in the fitted state from the inside to the outside. 3 and a nut 4 screwed to its penetrating end.

Regarding the detailed structure of these components,
This will be described below in order. The box-shaped rod receiving member 1 is shown in FIGS.
As shown in the figure, the fitting portion 5 having such a shape that the above-mentioned bundling portion can be completely fitted into one of the opposed side walls 1a, 1a.
Are provided in a notch shape, respectively. At the center of the bottom surface of the fitting portion 5, there is provided a mountain-shaped projection 5a corresponding to a substantially V-shaped concave shape generated on the outer periphery of the above-mentioned bundled portion.

In the middle of the bottom surface 1c of the rod receiving member 1,
A bolt hole 6 through which the fastening bolt 3 is inserted is provided. Further, on the outer surface of the bottom surface 1c, there is provided an annular projection 7 surrounding the edge of the bolt hole 6 to serve as a seat for the nut 4. On the upper edge of the other opposed side wall 1b, a thick portion 1 for reinforcement is provided.
d is provided.

Next, the box-shaped fastening member 2 shown in FIGS. 6 to 8 is fitted to the inside of the rod receiving member 1 as shown in FIG. Notch portions 8 for fastening two rod-shaped members B one by one one by one are provided in one of the opposed side walls 2a, 2a facing each other.

As shown in FIG. 6, the notch 8 for fastening is formed in a substantially V-shaped notch from the upper edge of the opposing side wall 2a. It is slightly wider than the diameter, and a widened portion b is formed in the inner part where two rod-shaped members B, B can be bundled side by side and accommodated. Each side portion of the widened portion b is formed in a laterally V-shape to be a tightening portion c of the bar-shaped material B.

On the upper edges of the other opposing side walls 2b, 2b of the fastening member 2, as the fastening member 2 is fitted inside the rod receiving member 1, the other side of the rod receiving member 1 is inserted. Opposing side wall 1b,
The protrusion 9 of this embodiment, which has a protrusion 9 of a predetermined degree of protrusion that interferes with the inner wall surface of the side wall 1b, is formed by a method of bending the upper edge of the opposing side wall 2b outward. In the middle of the bottom surface 2c of the fastening member 2, a bolt hole 10 for passing the fastening bolt 3 is provided. 3a is the head of the fastening bolt 3.

Next, a description will be given of a method of adding two rod-shaped members B, B to a desired arbitrary length by using a connecting metal A, with reference to FIGS. 9 and 10. FIG. At the time of shipment of the connecting fitting A, as shown in FIG. 9, the rod receiving member 1 and the tightening member 2 partially fitted in the inner space thereof are combined by the fastening bolt 3 and the nut 4.

Therefore, at the time of use, the two rod-shaped members B, B to be connected are bundled together at their connecting side ends so as to have a required extension length, and each of the two is connected to each other. As shown in FIG. 9, they are sequentially pushed into the fastening notches 8. Then, the two pushed rod-shaped members B, B are guided by the chevron-shaped projections 5a provided on the fitting portion 5, and fit in a state of being arranged side by side at the widened portion b as shown in the figure.

At this time, as shown in FIG. 9, the protrusion 9 provided on the upper edge of the opposing side wall 2b of the fastening member 2 is hooked on the upper edge of the opposing side wall 1b of the rod receiving member 1. It is in the state where it was. Therefore, when the nut 4 is tightened with a wrench or the like in order 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. The rod will be drawn into the inner space of the rod receiving member 1. still,
When tightening the nut 4, the connecting bracket A
May be turned upside down together with the bar-shaped material B.

Accordingly, each opposing side wall 2b of the fastening member 2 protrudes outward from the upper edge thereof, and the projection 9 is formed on the rod receiving member 1.
By being interfered with the reinforced opposing side walls 1b, each is pushed inward. Therefore, fastening notch 8
Is forcibly narrowed as shown in FIG.

Accordingly, as shown by an arrow in FIG. 10, the width of the widened portion b is reduced, and the apex angle of the V-shaped portion of the tightening portion c on both the left and right sides is reduced. Therefore, the bundling point of the two bar-shaped members B, B accommodated in the widening point b is strongly sandwiched between the right and left V-shaped tightening points c, c, and furthermore, It is also in a state of being strongly held between both edges of the V-shaped portion at the fastening point c.

Thus, the connecting member A connects the bundled portions of the two rods B, B with a much stronger tightening force than the conventional connecting member 60 described at the beginning. Give me

The fastening member 2 may be formed not in a box shape but in a U-shaped bracket shape in which the other opposed side walls 2b, 2b are at least partially omitted. In this case, the protrusions 9 are provided to protrude outward at both end portions of one of the opposed side walls 2a.

[0025]

As is clear from the above description, the metal fittings for connecting rods according to the present invention are practically superior to the conventional metal fittings shown in FIG. It works. (A) Due to its fastening mechanism, a much greater connection strength is obtained. (B) The productivity is low, the working environment is poor, the bonding strength tends to vary, and no welding point is required. (C) Efficient mass production is possible by plastic working with excellent productivity and homogeneity. (D) The work of fitting the connection side ends of the two rod-shaped members into the connection fittings, respectively, can be performed very efficiently since they are dropped from above rather than inserted from both ends, as in the related art. (E) Work can be easily performed even in a narrow mold. (F) It is not necessary to incorporate a wedge for fastening, and since the fastening force is strong, the outer shape of the connection fitting 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 of a state in which two rod-shaped members are connected via a connection fitting.

FIG. 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 viewed from the bottom side.

FIG. 6 is a longitudinal sectional view of the fastening member.

FIG. 7 is a plan view of the same fastening member.

FIG. 8 is a perspective view of the fastening member as viewed from the bottom side.

FIG. 9 is a vertical cross-sectional view of the connection fitting, showing a state where the bundling portions of two rod-like 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 has been completely tightened and connected.

FIG. 11 is a partial plan view showing a concrete wall whose thickness gradually increases (decreases) from one end to the other end, in a state where a separator is assembled to a casting formwork.

FIG. 12 shows a conventional example, and is a perspective view of a connection fitting.

FIG. 13 is an explanatory diagram of the connection operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Connecting metal fitting B Bar-shaped material 1 Rod receiving member 2 Tightening member 1a, 2a One opposing side wall 1b, 2b The other opposing side wall 1c, 2c Bottom surface 1d Thick part 3 Fastening bolt 3a Head 4 Nut 5 Fitting part 5a Projection 6,10 Bolt hole 7 Annular projection 8 Notch for fastening 9 Protrusion a Opening b Widening location c Tightening location 50 Form panel 51 Separator 51a Separator for connecting foot 52 Cup 60 Connection fitting 61 Main body 62 Long nut 63 Fastening bolt 64 Wedge 65 Through hole

Claims (4)

[Claims] 1. A connecting member for binding two rod-shaped members, which are connected to each other at a predetermined length in a state where the connecting-side ends are bundled over an arbitrary length. In the form of a box, one of the opposed side walls 1a,
1a is provided with a fitting portion 5 for fitting the bundled portion, and a rod receiving member 1 having a bolt hole 6 formed on a bottom surface 1c; and a box-like member having an open top surface.
2a, a notch 8 for fastening provided with a widened portion b in which the width of the opening a is slightly larger than the diameter of the bar-shaped material B and which can accommodate the two bar-shaped materials B side by side in the back thereof is provided. 2c is provided with a bolt hole 10 and a fastening member 2 large enough to be superimposed on the inside of the rod receiving member 1, and a fastening bolt inserted from the inside into both bolt holes 6 and 10 in the superimposed state. 3 and a nut 4 screwed to the protruding end thereof, and the other opposing side walls 2b, 2b of the tightening member 2 are attached to the other of the rod receiving members 1 with the tightening of the nut 4. A bar-shaped connection metal fitting provided with a projection 9 which interferes with the opposing side walls 1b, 1b. 2. The metal fitting for connecting a rod-shaped material according to claim 1, wherein both side ends of said widened part b are formed in a laterally V-shape to be a fastening part c of the rod-shaped material B. 3. The metal fitting for connecting rod-shaped members according to claim 1, wherein a substantially mountain-shaped projection 5a is provided at the center of the bottom of the fitting portion 5. 4. The fastening member 2 omits the other opposing side wall 2b, and the projections 9 are provided at both side ends of the one opposing side wall 2a. The metal fitting for connecting a rod-shaped material according to any one of the above.