JPH071444Y2 - Concrete formwork connecting device - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention connects opposing concrete formwork to each other,
The present invention relates to a concrete formwork connecting device for holding a space between the formwork forms.

(Prior Art) Generally, a connecting device is used to hold a space between facing concrete formwork when placing concrete in civil engineering / construction work or the like. And, for example,
In the assembling construction of the beam formwork, the preassembled formwork is mounted on the beam reinforcement, and then the opposite formwork is connected by a connecting device.

Conventionally, in order to facilitate the work of connecting the molds, the mounting brackets are fixed to the molds during the assembly of the molds, and after the mounting of the molds to the beam bars is completed, the mounting brackets are provided at the inner ends of the molds. It has been proposed to engage both ends of a separator with a holding member with a single touch to connect the molds to each other (Actual number 59-124).
See No. 258).

In this conventional coupling device, an upper opening-shaped engaging portion is formed on a holding member made of resin such as plastic fixed to the inner surface side of the concrete formwork, and the end of the separator fitted from above to the engaging portion is formed. The retaining member is provided with a retaining member that prevents the portion from coming out of the engaging portion.

(Problems to be solved by the invention) However, the conventional retaining member is integrally formed with a resin-made holding member so as to project downward from the opening edge of the engaging portion toward the inside of the engaging portion. , The end of the separator is
Since the retaining member is pushed into the engaging portion from above and forcedly elastically deformed, the retaining member is retained in the engaging portion, so that the retaining member is damaged when the end portion of the separator is inserted, The member may be plastically deformed and the separator may easily come off.

On the other hand, in order to prevent damage and plastic deformation of the retaining member as described above, it is conceivable to form the retaining member as wide as possible. However, if the retaining member is made too wide, on the contrary, the retaining member is less likely to be elastically deformed, making it difficult to insert the separator, and the retaining member is enlarged inward and outward in the formwork due to the increased width. There is an inconvenience that the space not filled with concrete becomes large and the strength of the concrete is weakened.

In view of such circumstances, the present invention provides a connection device that can connect separators with a single touch, and a concrete inserter can be easily inserted and a retaining member can be reliably retained without causing enlargement of a holding member. It is an object to provide a form connecting device.

(Means for Solving the Problem) In the present invention, in order to achieve the above-mentioned object, the following technical means were taken.

That is, according to the present invention, the holding member 5 fixed to the inner surface side of the concrete formwork 2 is formed with the engaging portion 6 having an upper opening, and the end portion of the separator 4 fitted into the engaging portion 6 from above is In a concrete formwork connecting device in which a retaining member (7) for preventing the retaining member (7) from coming out upward is provided in the holding member (5), the retaining member (7) has a central portion cut off upward. It consists of a metal plate material formed in a bifurcated shape by
An engaging locking recess 28 into which the end of the separator 4 is fitted is provided on the inner side edge of the bifurcated part, and a locking projection 30 protruding outward in the width direction is provided on the outer side edge of the bifurcated part. Guide grooves 24 for vertically guiding both widthwise edges of the retaining member 7 are formed on both left and right sides of the portion 6 so as to face each other. The guide grooves 24 are engaged with the locking projections 30. Is formed with a locking stepped portion 26 for preventing upward movement of the retaining member 7, the retaining member 7 is inserted into the guide groove 24 with its forked portion facing upward, and Stop recess
It is characterized in that the 28 and the locking projection 30 are temporarily fixed in a state of protruding above the engaging portion 6.

(Operation) According to the present invention, the retaining member 7 has the fitting locking recess 28
Since the locking protrusion 30 and the locking protrusion 30 are temporarily fixed to the guide groove 24 in a state of protruding above the engaging portion 6, when the end portion of the separator 4 is pushed down toward the bifurcated portion of the retaining member 7, first, the same result is obtained. When the end fits into the fitting locking recess 28, and then the retaining member 7 moves downward along with the end along the guide groove 24, and the locking projection 30 engages with the locking step 26. Thus, the upward movement of the retaining member 7 is prevented, so that the separator 4 is retained.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 11, reference numeral 1 is a connecting device, which is a pair of mounting brackets 3 and 3 which are fixed to be opposed to concrete molds 2 and 2 facing each other, and both ends of these mounting brackets 3 are engaged with each other. Formwork
Separator 4 for holding the space between 2 and 2, holding member 5 provided at the end of mounting fitting 3, and locking fitting (separation prevention member) fitted to separator engaging portion 6 of holding member 5. 7
And the mounting bracket fastener 8 and the like.

The mounting member 3 is made of a round bar-shaped steel material, and has an L-shaped bent portion 9 bent at a substantially right angle in the horizontal direction at one end and a mounting portion 11 having a male screw portion at the other end. Further, on the mounting portion 11 side from the bent corner portion of the mounting bracket 3, a circumferential groove is formed.
12 are formed, and the circumferential groove 12 is formed when concrete is cast between the molds 2 and 2 and the mold 2 is removed after the solidification,
The purpose is to make it easier to fold the end of the mounting portion 11 protruding on the concrete surface to remove it.

In addition, the bent portion 9 of the mounting member 3 is provided with the holding member 5 formed in a block shape by a synthetic resin machine in a surrounding shape.

The separator 4 is made of a round bar-shaped steel material, and is bent at substantially right angles in the same direction at both ends thereof to form an L-shaped bent portion 13, and the interval between the molds 2 can be changed depending on the length thereof.

The holding member 5 is provided with a fitting portion 14 for fitting the bent portion 9 of the mounting member 3 from the horizontal direction. The fitting portion 14 has an insertion hole 15 penetrating in the horizontal direction for inserting a tip from the bent corner portion of the bent portion 9 and a bent corner portion of the bent portion 9 communicating with the insertion hole 15. And the mounting portion 11 side in the vicinity thereof is configured with a fitting recessed portion 16. A through hole 18 for inserting the retaining pin 17 of the mounting member 3 is provided in the vertical direction on the surface of the fitting portion 14 facing the recessed portion 16 in the vicinity of the corner of the holding member 5. Has been.

In addition, the mounting metal fitting 3 has the bent portion 9 fitted to the fitting portion 14 of the holding member 5, and the mounting portion 11 is inserted into the mounting hole 19 formed in the form 2 to form one end surface of the holding member 5. 5A is brought into contact with the inner surface of the mold 2, and the male screw portion 10 of the mounting portion 11 is screwed with a nut that is a fastener 8, and the mold 2 is sandwiched by the holding member 5 and the nut 8 to form the mold 2. Installed.

Further, the holding member 5 is provided with an engaging portion 6 for inserting the bent portion 13 of the separator 4 from above and engaging the bent portion 13 with the bent portion 9 of the mounting member 3. The engaging portion 6 has an insertion hole 20 penetrating in the vertical direction for inserting a tip from the bending corner portion of the bending portion 13, and a horizontal portion in the vicinity of the bending corner portion of the bending portion 13 communicating with the insertion hole 20. And an upper opening-shaped recessed portion 21 into which is inserted. The insertion hole 20 is formed so as to be orthogonal to the insertion hole 15 of the fitting portion 14 and is formed in the vicinity of the inner portion 22 of the recessed portion 16 of the fitting portion 14 to form the recessed portion 21.
The depth is formed up to the upper edge of the insertion hole 15 of the fitting portion 14. Therefore, the bent portion 13 of the separator 4 is hooked on the bent portion 9 of the mounting member 3 at each bent corner portion.

Further, the other end surface of the holding member 5 is provided in the recess 21 of the engaging portion 6.
A fitting portion 23 of the locking fitting 7 is formed near 5B. The fitting portion 23 communicates with the pair of fitting grooves (guide grooves) 24 formed in the vertical direction on the facing wall surface of the recessed portion 21 and the lower surface of the recessed portion 21 and communicates with the fitting grooves 24, 24, and A slit-like locking metal fitting insertion hole 25 provided so as to penetrate therethrough, and the groove depth of the upper part of the fitting groove 24 is made shallower than that of the lower part so that the locking metal fitting 7 is locked. A stop portion 26 is formed. Further, the fitting hole 25 is provided with a locking metal fitting retaining projection 27 on the side wall surface of the other end surface 5B of the holding member 5 (see FIGS. 6 and 11).

As shown in FIGS. 7 to 11, the locking metal member 7 is made of a metal plate material formed in a bifurcated shape by cutting off the central portion in an upward opening shape. Fitting locking recess 28 into which the end of the separator 4 fits
And a locking projection 30 projecting outward in the width direction is provided on the outer edge of the forked portion.

That is, the locking metal fitting 7 is formed by the forked end portions 7A and 7B.
However, due to the springiness of the other connecting portion, the fitting locking concave portion 28 of the substantially semicircular separator 4 facing the facing end portions 7A and 7B is formed so as to be slightly bent inward and outward, and the separator is formed on the upper portion thereof. The insertion guide portion 29 is provided in an inclined shape. Then, locking projections 30 and 31 are formed in two steps in the upper and lower directions on the outer side surfaces of the facing end portions 7A and 7B, respectively.
As shown in FIG. 9, 1 is a mounting bracket 2 before the mold 2 is assembled.
It is used to prevent slipping during transportation and to temporarily fix the locking metal fitting 7.

That is, the lower locking projection 31 of the locking metal fitting 7 is hooked on the upper opening edge of the fitting groove (guide groove) 24 as shown in FIG. While being inserted into the insertion groove 24 with the part facing upward,
Before the attachment of the separator 4, the fitting locking concave portion 28 and the locking projection 30 are temporarily fixed so as to project above the engaging portion 6.

On the other hand, as shown in FIG. 10, the upper locking projections 30 are engaged with the locking stepped portions 26 of the engaging portions 6 when the fitting of the separator 4 is completed, and hold the engaged state of the separator 4. is there.

That is, when the bent portion 13 of the separator 4 is fitted into the engaging portion 6, the tip end is made to face the recess 21 and between the fitted locking concave portions 28 of the locking metal fitting 7 in the state shown in FIG. Separator 4
By pushing in the horizontal portion near the bending portion 13 of the above, and further pushing in the bending portion 13, the locking metal fitting 7 also has its opposite end portions 7A, 7A.
When B bends inward and is pressed into the fitting hole 25 together, and when the bent portion 13 and the bent portion 9 of the mounting member 3 are completely engaged with each other, the locking protrusion 30 of the locking member 7 is inserted into the fitting groove. The locking stepped portion 26 of 25 is engaged, and the state shown in FIG. 10 is obtained. At this time, a shearing force acts on the locking step portion 26, but the locking step portion 26 is designed not to be damaged due to the stress caused by the concrete pouring. In this way, the separator 4 can be operated by one-touch operation by simply pushing both ends of the separator 4 into the engaging portions 6.
It is possible to engage and prevent the same at the same time. And
When the separator 4 is engaged in the state shown in FIG.
Even if concrete is poured between the two, the separator 4 does not come off from the mounting bracket 3 due to the pressure,
The engaged state is maintained.

The locking metal fitting 7 is provided with a locking piece 32 slightly protruding from the plate surface inside the center of the connecting portion in a cut-and-raised shape.
As shown in FIG. 11, in order to prevent the mounting metal fitting 3 from falling off during transportation, the mounting metal fitting 3 is locked by the retaining projection 27 provided in the locking metal fitting hole 25 of the holding member 5, and the lower locking projection 31. The metal fitting 7 is fixed to the holding member 5 by being locked at the entrance of the fitting groove 24.

By the way, after the bent portion 13 of the separator 4 and the bent portion 9 of the mounting bracket 3 are completely engaged, the fastener 8 is tightened,
The mold 2 is made stronger, the mold 2 and the holding member 5
And can be more closely connected.

Further, the mounting member 3 can be embedded in the holding member 5 when the holding member 5 is molded.

The above embodiment is an example of finishing the concrete surface, but when the concrete surface is not exposed and is not finished, as shown in FIG. 12, the formwork on the mounting portion 11 of the mounting bracket 3 is used. A cone-shaped pad washer 33 is interposed between 2 and one end surface 5A of the holding member 5.

Needless to say, the present invention is not limited to the above embodiment.

(Effect of the Invention) According to the present invention, the retaining member 7 is made of a bifurcated metal plate material having a central portion cut off in an upward opening shape, and the separator 4 is pushed into the bifurcating portion of the retaining member 7 and The end portion of the separator 4 is fitted in the fitting locking recessed portion 28 formed on the opposite inner edge of the bifurcated portion in the temporarily fixed state, and thereafter, the locking projection 30 is provided when the retaining member 7 enters the engaging portion 2. Since the separator 4 is prevented from coming off from the holding member 5 by engaging the locking stepped portion 26 on the guide groove 24 side, the coming-off preventing member 7 is damaged when the end of the separator 4 is inserted, The member 7 does not plastically deform and the separator 4 does not easily come off, and the separator 4 can be reliably prevented from coming off.

Moreover, since the retaining member 7 made of a metal plate is lowered along the guide groove 24 in the vertical direction, the thickness of the holding member 5 inside and outside the frame does not increase, and the holding member 5 can be made compact. .

Further, the retaining member 7 is fitted with the engaging recess 28 and the engaging projection 30.
Is temporarily fixed in a state of protruding above the engaging portion 6,
Since the separator 4 can be fitted into the fitting locking recess 28 at the time of temporarily fixing the retaining member 7, the retaining member 7 for the separator 4 can be secured.
It can be easily inserted into.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is an external perspective view of a holding member, FIG. 3 is a partially cutaway enlarged plan view of a connected state, and FIG. Fig. 3 bottom view, 5
FIG. 6 is a front view of FIG. 3, FIG. 6 is a cross-sectional view taken along the line AA of FIG. 3, FIG. 7 is a plan view of a locking metal fitting, FIG. 8 is a right side view of FIG. 7, and FIG. 5 is a sectional view taken along the line BB in FIG. 5 in a state before engaging the separator, and FIG. 10 is a sectional view taken along the line BB in FIG.
FIG. 11 is an enlarged cross-sectional view of portion C of FIG. 6, and FIG. 12 is a front view showing another usage example. 1 ... Connection device, 2 ... Concrete formwork, 3 ... Mounting bracket,
4 ... Separator, 5 ... Holding member, 6 ... Separator engaging part, 7 ... Detachment prevention member (locking metal fitting), 24 ... Guide groove (fitting groove), 26 ... Locking step part, 28 ... Fitting locking recessed part, 30 ... Locking protrusion.

Claims (1)

[Scope of utility model registration request] 1. A holding member (5) fixed to the inner surface side of a concrete formwork (2) is provided with an upper opening-shaped engaging portion (6), and the engaging portion (6) is fitted from above. In the connecting device for the concrete formwork, wherein the retaining member (5) is provided with a retaining member (7) for preventing the end of the separator (4) from upwardly disengaging from the engaging portion (6), The retaining member (7) is made of a metal plate material formed into a bifurcated shape by cutting the central portion upwardly open, and the ends of the separator (4) are fitted to the opposing inner edges of the bifurcated portion. The fitting locking recess (28) and the locking projections (30) projecting outward in the width direction are provided on the outer edges of the bifurcated portions, and the retaining members are provided on both left and right side surfaces of the engaging portion (6). A guide groove (2) that vertically guides both widthwise edges of the member (7).
Locking step portions (26) which are formed to face each other, and which engage the locking projections (30) in the guide grooves (24) and prevent upward movement of the retaining member (7). The retaining member (7) is inserted into the guide groove (24) with its forked part facing upward, and the fitting locking recess (28) and the locking projection (30) are formed. The engaging part (6)
A concrete formwork connecting device, which is temporarily fixed in a state of projecting above.