JPS63930Y2 - - Google Patents

Description

[Detailed description of the invention] A conventional tightening metal fitting with a structure in which the center hole of a presser washer, which has recesses that fit into the upper and lower side beams on the upper and lower edges of the weir plate side, is fitted into a tightening rod. In this case, the horizontal beams used in pairs (upper and lower) are connected together with several fastening fittings so that a small gap is formed, and
In order to assemble the horizontal beams on the outside of the vertical beams by fitting several tightening rods into the small gaps between the integrally connected horizontal beams and assembling the horizontal beams on the outside of the vertical beams. In addition to requiring a lot of effort and time to connect and disassemble the materials,
Difficult to handle.

On the other hand, because the transition length of the presser washer is long, in the case of a screw-tightening method, the nut feed is slow and requires many rotation operations, and it takes a lot of time to assemble and dismantle the formwork, reducing work efficiency. bad.

In addition, in the case of the wedge-based tightening method, the force transmitted by driving the wedge is not smooth, and the wedge floats due to vibration, causing the tightening to loosen.

Further, both of the above-mentioned types had drawbacks such as excessive tightening or uneven tightening at the tightening portion, and unevenness on the concrete surface, making it impossible to form the concrete surface accurately.

Therefore, in order to solve the above-mentioned defects, the present invention pivots the middle part of the hook-shaped presser arm to the tip of the clamping rod, which is equipped with a mechanism for attaching to the weir plate with a separator at the base, and fixes the lower horizontal member. by passing it over the tip hooks of several hook-shaped presser arms, and then fitting the upper horizontal flap between the bases of the several hook-shaped presser arms and the vertical flap. This relates to a concrete formwork fastening fixture that can set horizontal beams, make assembly and dismantling of formwork simple and quick, and also form concrete surfaces accurately to improve work efficiency. .

To explain the structure of the first embodiment of the present invention shown in FIGS. 1 to 4, a indicates a concrete formwork clamping fixture, 1 is a clamping rod thereof, and a collar 2 is provided at the base end. A screw hole 3 is installed in the center of the proximal end surface.
Reference numeral 4 denotes a hook-shaped presser arm with a U-shaped cross section, and engagement surfaces 5 and 6 are formed on the inner side of the tip hook and the inner side of the base, respectively, and the proximal edge of the hook-shaped presser arm 4 is directed toward the engagement surface 6 side. The intermediate through hole 8 of the center piece of the hook-shaped presser arm 4 is loosely fitted into the clamping rod 1, and the intermediate part of the hook-shaped presser arm 4 is attached to the tip of the clamping rod 1 with a pin 9. are pivotally connected to form a fastening fitting a.

Reference numeral 10 designates a separator, which has screws 11 installed at both ends and a stopper 12 at its base end, and a terminal 13 is screwed into the screw 11 up to the stopper 12. A is a weir plate that constitutes the concrete formwork, and through holes 14 are bored at appropriate locations. B is the vertical shingle material of the round pipe placed on the outer surface of weir plate A, C and D are the upper and lower horizontal shingle materials of the round pipe to be assembled on the outside,
E indicates a concrete wall.

Next, how to use the fastener will be explained. Erect the weir plates A on both sides, insert the screws 11 at both ends of the separator 10 with terminals 13 into the through holes 14, and screw the screw holes 3 of the clamping rod 1 into the protruding parts of the screws 11 to connect the terminals 13 and the clamping rod. Weir plate A with tsuba 2 of 1
, and the hook-shaped presser arm 4 of the fastening fitting a is directed in the vertical direction.

Therefore, after arranging the vertical flaps B on the outer surface of the weir plate A, the hook-shaped presser arms 4 of the fastening fittings A, which are arranged in a suitable number in the left-right direction, are tilted outward and downward as shown by the chain lines in Fig. 4. , Then, as shown by the solid line, the horizontal flap material D is placed on the outside of the vertical flap material B and the hook-shaped presser arm 4 is pressed.
is rotated clockwise in FIG. 4 about the pin 9 as a fulcrum to bring the engaging surface 5 into contact with the horizontal member D.

Next, the horizontal flap material C is inserted from above between the vertical flap material B and the hook-shaped presser arm 4, and is fitted between the vertical flap material B and the engaging surface 6 as shown in FIG. , horizontal flaps C and D are set, and the terminal 13 and the hook-shaped presser arm 4 clamp and fix the weir plate A and the vertical and horizontal flaps B, C, and D together, and both sides of the weir plate A The formwork is constructed by maintaining a predetermined spacing.

Therefore, after constructing concrete wall E by pouring concrete in the space surrounded by weir plate A, when dismantling the formwork, operate in the opposite manner as described above, and then After removing the girder D and the vertical shingle B, unscrew the fastener a and remove the weir plate A.
Formwork can be dismantled.

On the other hand, instead of the separator 10 with the terminal 13 described above, a separator with a conical terminal is obtained by screwing the screw hole at the center of the inner surface of the conical terminal with the center bolt protruding outward to the screw 11 of the separator 10 up to the stopper 12. When using , it works in the same way as above.

In the second embodiment of the present invention shown in FIG. 5, the base end screw 16 of the hook-shaped bent hanging rod 15 is screwed into the screw hole 3 of the tightening rod 1 of the fastening fitting a in the first embodiment. be.

Reference numeral 10' denotes a band-shaped separator, with through holes 17 bored at both ends. A' is a metal weir plate, and its edge frame has a large number of through holes 14' lined up at appropriate intervals.

In this structure, the upper and lower weir plates on both sides
When the end of the separator 10' is sandwiched between the edge frame of A', the hanging rod 15 is inserted through the through holes 14' and 17, and the hanging rod 15 is hooked on the edge frame of weir plate A'. The upper and lower weir plates A' and the separator 10' are integrally connected by the hanging rod 15, and the tightening fitting a with the hanging rod 15 is attached to the weir plate A' with the separator 10'. Operate to assemble formwork.

In addition, after sandwiching the ends of the separator 10' between the edge frames of the upper and lower weir plates A' on both sides,
4', 17, and connect the upper and lower weir plates A' and separator 10' together with the U clips to stand up the weir plate A'. Even if the hanging rod 15 is inserted into the hole 14' and the hanging rod 15 is hooked on the edge frame of the weir plate A', the hanging rod 1
Tightening bracket a with 5 is a weir plate with separator 10'
Since it is attached to A', the formwork can then be assembled by operating in the same manner as above.

To explain the structure of the third embodiment of the present invention shown in FIG. 6, a' indicates a tightening fitting, 1' is its tightening rod, and the proximal end of the tightening rod 1 in the first embodiment. In place of the collar 2 and screw hole 3, a downward hook-shaped hook 15' is provided at the base.

This structure can also be used for the metal dam plate A' to assemble a formwork in the same way as the fastening fitting a with the hanging rod 15 in the second embodiment.

To explain the structure of the fourth embodiment of the present invention shown in FIG. 7, a'' indicates a tightening fitting, 1'' is its tightening rod, and the base end of the tightening rod 1 in the first embodiment. Instead of the collar 2 and the screw hole 3, the base end is formed into a bifurcated 2'', and an inverted U-shaped guide bar 3'' shaped like the head of a nail puller is fitted and fixed into the tip of the bifurcated 2''. .1
0'' is a separator, which has heads 18 on both ends and a terminal 1 that is secured with a stopper 12 at a slightly inner position.
Insert 3.

In this structure, the through hole 14 of the weir plate A
After inserting the end of the separator 10'' into
When the separator 10'' is fitted into the part between the weir plate A and the weir plate A and is lowered, the separator 10'' is pulled out by the head 18 guided by the guide metal 3'', and the separator 10'' is pulled out between the head 18 of the separator 10'' and the terminal 13. Since the weir plate A and the guide metal 3'' are sandwiched and the clamping fitting a'' is attached to the weir plate A with the separator 10'', the formwork can then be assembled by operating in the same manner as described above.

In the present invention, the concrete formwork clamping fittings are configured as described above, so after hooking the lower horizontal member to the end hooks of the hook-like presser arms of several clamping fittings,
When the upper horizontal flap member is fitted between the base of the hook-shaped presser arm and the vertical flap member, the upper horizontal flap member is engaged with the engagement surface of the base of the hook-shaped presser arm, and the hook-shaped Formwork can be constructed by pressing and setting the upper and lower horizontal beams with the presser arm, and unlike conventional methods, the horizontal beams used in pairs can be connected with several fastening metal fittings, or they can be disassembled. In addition, the formwork can be assembled and dismantled easily and quickly without the use of tools.

Furthermore, since the upper and lower horizontal beams are not tightened and the locking position of the horizontal beams is always the same, the horizontal beams are in even contact with the vertical beams over the entire surface of the formwork, making it possible to maintain the same position as before. There is no deformation of the weir plate due to over-tightening or uneven tightening of the formwork. Therefore, even an unskilled worker can always tighten and fix the formwork evenly and form the concrete surface with high precision, improving work efficiency.

Furthermore, the upper horizontal flap member is moved in and out between the base of the hook-shaped presser arm and the vertical flap member from the outside of the base end, and
The insertion of the upper crosspiece is guided by the inclined guide surface of the proximal edge of the hook-shaped presser arm, so the installation and removal operations of the upper crosspiece are simple, light and smooth, and the structure is It is extremely simple and can be produced easily and inexpensively, and its fixation is reliable and firm.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a concrete form assembled using a fastening fitting according to the first embodiment of the present invention, Fig. 2 is a front view of the fastening fitting, and Fig. 3 is a slope view. , Fig. 4 is an explanatory side sectional view showing the state of the concrete formwork assembly, and Fig. 5 is the second embodiment of the present invention.
A side sectional view of the concrete formwork assembled using the fastening fittings according to the embodiment, and FIG. 6 is a side sectional view of the concrete formwork assembled using the fastening fittings according to the third embodiment of the present invention. FIG. 7 is a side sectional view of a concrete form assembled using a fastening fitting according to a fourth embodiment of the present invention. 1... Tightening rod, 4... Hook-shaped presser arm, 5, 6
...Engagement surface, 9...Pin, C...Upper side beam,
D...Lower horizontal lumber.

Claims (1)

[Scope of utility model registration request] The base of the tightening rod is equipped with a mechanism for attaching it to the weir plate with a separator, and the tip of the tightening rod has a hook-shaped surface that forms an engagement surface with the lower side beam on the inside of the tip hook. The middle part of the presser arm is pivotally connected by a pin, and the upper crosspiece is moved in and out from the outside of the base end inside the base of the hook-like presser arm, and the upper crosspiece is locked in a predetermined position. A concrete formwork fastening fixture that forms an engagement surface with an upper horizontal beam that can be formed, and serves as a guide surface that slopes the proximal edge of the hook-shaped presser arm toward its inner tip side.