JPS6220594Y2 - - 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, It takes a lot of time and effort to connect and disassemble the bata wood, and it is 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 a 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 eliminate the above-mentioned defects, the present invention has developed an intermediate part of the upper and lower presser feet, which is equipped with a concave part on the base side edge and a contact surface on the distal end of the upper and lower opposing sides, and The upper and lower presser feet are pivoted to the upper and lower protruding parts of the mounting bracket, respectively, and the upper and lower presser feet are pressed in opposite directions by springs so that the base side opens, and the tip surface of the tightening rod is attached to the left and right opposite sides of the upper and lower edges. The center part of a vertically long locking cam with a cam surface is rotatably supported on the shaft, and the upper and lower horizontal strips are fit into the recesses of several presser feet to resist the elasticity of the spring. By moving in the direction of the tightening rod, several presser feet can be operated simultaneously to set the upper and lower crosspieces, and the upper and lower pressers can be fixed by rotating the locking cam to secure the formwork. The present invention relates to a concrete formwork fastening fixture which allows the formwork to be assembled and dismantled easily and quickly, and which also enables accurate formation of the concrete surface and improves 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, and a pin 5 is installed with mounting brackets 4 on both sides protruding up and down in the middle part.
It sticks to the surface. 6 and 7 are placed symmetrically up and down 1
A pair of presser feet with arcuate recesses 8 and 9 on the proximal edge.
, the abutment surfaces 10, 1 are placed on the ends of the top and bottom sides opposite to each other.
1 are respectively provided, and the intermediate portions of the upper and lower presser feet 6 and 7 are fitted between the upper and lower protrusions of the both-side mounts 4, respectively, and are pivotally connected by pins 12 and 13. 14 and 15 are springs wound around the side protrusions of the pins 12 and 13;
Both ends of the mounting bracket 4 and the protrusions 16, 1 of the presser foot 6
7, both ends of the spring 15 are latched to the protrusions 18 and 19 of the mounting bracket 4 and the presser foot 7, respectively, and the elasticity of the springs 14 and 15 opens the presser feet 6 and 7 at their base sides. oppress each other in opposite directions. 20 is a vertically long locking cam provided at the tip of the tightening rod 1, and the contact surface 10 of the presser foot 6, 7,
Cam surfaces 21 and 22 to be connected to the locking cam 11 are provided on the left and right opposite sides of the upper and lower edges, and operating pieces 23 are installed on both side edges, and the center part of the locking cam 20 is attached to the tip surface of the tightening rod 1. 24 rotatably supports the clamping metal fitting a.

A separator 25 has screws 26 installed at both ends thereof and a stopper 27 at its base end, and a terminal 28 is screwed into the screw 26 up to the stopper 27. A is a weir plate constituting the concrete formwork, and through holes 29 are bored at appropriate locations. B is a triangular pipe to be placed on the outer surface of weir plate A, that is, a vertical beam of a pipe with a cross section in which the corners of a regular triangle are formed into an arc shape, and C and D are 3 to be assembled in a pair on the outside. The horizontal beams above and below the square pipe, E indicates the concrete wall.

Next, how to use the fastener will be explained. Stand up the weir plates A on both sides, insert the screws 26 at both ends of the separator 25 with terminals 28 into the through holes 29, and screw the screw holes 3 of the tightening rod 1 into the protruding parts of the screws 26 to connect the terminals 28 and the tightening rod. Weir plate A with tsuba 2 of 1
While holding the clamp, the presser feet 6 and 7 of the fastening fitting a are directed in the vertical direction. Thereafter, when the locking cam 20 is rotated about the shaft 24 and laid down as shown in FIG.
It rotates due to the elasticity of 4 and 15, and its inner part becomes open.

Therefore, after arranging the vertical beams B on the outer surface of the weir plate A, one corner of the horizontal beams C was placed in the recess 8 of the presser foot 6 of the clamping fittings a, which were arranged in a suitable number in the left-right direction. When they are fitted together and then the horizontal flap material C is moved inward and downward, the horizontal flap material C and the several presser feet 6 resist the elasticity of the spring 14 and are integrated with the pin 12 as a fulcrum. 4, the other flat part of the horizontal flap C comes into contact with the vertical flap B and is held in this abutting state, as shown in FIG.

Next, as shown in Fig. 4, one corner of the horizontal flap material D is fitted into the recess 9 of the presser foot 7 of the fastening fitting a, and then the horizontal flap material D is inserted inside. If you lift it upward, the horizontal bar material D and several presser feet 7 will be removed.
resists the elasticity of the spring 15, pivots integrally with the pin 13 in the direction of the arrow in FIG.
As shown in the figure, the other flat part of the horizontal flap member D comes into contact with the vertical flap member B. Therefore, while holding the horizontal beam D in a lifted state, the locking cam 20 is rotated clockwise in FIG. 2 using the shaft rod 24 as a fulcrum from the above state to stand up as shown in FIG. 2. By the guiding action of the cam surfaces 21 and 22 of the locking cam 20, the upper and lower edges are joined to the contact surfaces 10 and 11 of the presser feet 6 and 7, and the locking cam 20 is fitted between the contact surfaces 10 and 11. This fixes the presser feet 6 and 7, and connects the terminal 28 and the presser foot 6,
7 and clamp the weir plate A and the vertical and horizontal flaps B, C, and D and tighten and fix them together.
The formwork is constructed by maintaining a predetermined spacing.

Therefore, after pouring concrete in the space surrounded by the weir plate A to construct the concrete wall E, when dismantling the formwork, the locking cam 20 should be used as the pivot rod 24 as the fulcrum as shown in Fig. 2. Rotate clockwise and lower as shown in Fig. 4 to release the fixation of the presser feet 6, 7, and operate in the opposite direction to the above to sequentially flatten the horizontal materials D, C,
After removing the vertical flap members B, screwing out the fastening fittings a and removing the weir plate A allows the formwork to be dismantled.

On the other hand, instead of the separator 25 with the terminal 28 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 26 of the separator 25 up to the stopper 27. When using , it works in the same way as above.

In the second embodiment of the present invention shown in FIG. 5, instead of the vertical and horizontal flaps B, C, and D of the triangular pipe in the above embodiment, the vertical and horizontal flaps B' and C of the round pipe are ', D', and instead of the presser feet 6, 7 in the above embodiment, the arcuate recesses 8, 9 are used.
The fastening fitting a' is constructed using presser feet 6' and 7' formed in concave portions that engage with the round pipe.

This structure also functions in the same manner as described above, and the formwork can be constructed by tightening the vertical and horizontal flap members B', C', and D'.

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 3'' is provided at the base.

25'' is a band-shaped separator with through holes 30 bored at both ends. A'' is a metal weir plate, and its edge frame has a large number of through holes 29'' lined up at appropriate intervals.

In this structure, the upper and lower weir plates on both sides
Sandwich the end of the separator 25'' between the edge frames of A'', insert the hanging pieces 3'' of the tightening rod 1'' into the through holes 29'' and 30, and attach the tightening rod 1'' to the weir plate A''. When hooked onto the edge frame of the clamping rod 1'', the hook piece 3'' of the tightening rod 1'' connects the upper and lower weir plates A'' and the separator 25'' together, and the tightening fitting a'' connects the separator 25'' with the weir plate A. After that, the formwork can be assembled by joining in the same manner as described above.

In addition, after sandwiching the ends of the separator 25'' between the edge frames of the upper and lower weir plates A'' on both sides,
9", 30, and use the U clips to connect the upper and lower weir plates A" and the separator 25'' together to stand up the weir plate A''. Even if the hook piece 3'' of the clamping rod 1'' is inserted into the through hole 29'' and the clamping rod 1'' is hooked on the edge frame of the weir plate A'', the clamping metal fitting a'' is attached to the weir plate with the separator 25''.
Since it is attached to A'', the formwork can then be assembled by operating in the same manner as above.

In the fourth embodiment of the present invention shown in FIG. 7, the base end screw 32 of the hook-shaped bent hanging rod 31 is screwed into the screw hole 3 of the tightening rod 1 of the fastening fitting a in the first embodiment. be.

This structure can also be used for the metal weir plate A'' to assemble a formwork in the same manner as the fastening fitting a'' in the third embodiment.

To explain the structure of the fifth embodiment of the present invention shown in FIG.
is the tightening rod, and instead of the collar 2 and screw hole 3 at the base end of the tightening rod 1 in the first embodiment, the base end is bifurcated into two.
An inverted U-shaped guide metal 3 shaped like a nail puller's head is fitted and fixed into the tip of the two forks 2. A separator 25 has heads 33 at both ends, and a terminal 28, which is secured by a stopper 27, is fitted at a slightly inner position.

In this structure, the through hole 29 of the weir plate A
After inserting the end of the separator 25 into the
If it fits into the part between 3 and weir plate A and lowers it,
The separator 25 is pulled out by the head 33 guided by the guide metal 3, and the weir plate A and the guide metal 3 are held between the head 33 of the separator 25 and the terminal 28, and the clamping fitting a is attached to the weir plate A with the separator 25. After that, the formwork can be assembled by operating in the same manner as above.

In the present invention, the concrete formwork clamping fitting is configured as described above, so when the locking cam is laid down, the upper and lower presser feet are opened at their base sides due to the elasticity of the spring, and their recesses are directed upward or downward. is maintained. Therefore, without operating the upper and lower presser feet in any way, the upper side piece fits into the recess of the upper presser foot of the clamping fitting from above and is pushed inward and downward, and the lower side piece is pushed downward. Simply fit into the recess of the lower presser foot of the clamping tool and lift it upward inwardly, then turn the locking cam to raise it up and fit it between the contact surfaces of the presser foot. It is possible to fix a pair of horizontal beams and install them vertically in parallel, which eliminates the need to connect or disassemble the horizontal beams used in a pair with several fasteners, as in the past. Since there is no such thing, that effort can be saved.

Furthermore, by immediately fitting the cross-piece into the recesses of the presser feet of several clamping fittings and moving it in the direction of the clamping rod, the presser foot of several clamping metal fittings can be flattened. The horizontal material can be installed by rotating integrally with the material, and after that, all you need to do is turn the locking cam, so the upper and lower presser feet of the tightening tool do not need to be operated at all due to the elastic pressure from the spring. In addition, since the locking cam only needs to be rotated, it is extremely easy to fix and release the upper and lower pressers using the locking cam, and the formwork can be assembled and dismantled easily and quickly. , and the locking position of the horizontal beams is always constant without tightening the upper and lower clamping fittings, so the horizontal beams are in even contact with the vertical beams over the entire surface of the formwork, and the formwork is not tightened like in the past. There is no deformation of the weir plate due to over-tightening or uneven tightening. Therefore, even if you are not a skilled craftsman, you can always tighten and fix the formwork evenly and form the concrete surface with high precision, improving work efficiency.

In addition, it has a simple structure, can be manufactured easily and inexpensively, operates light and smoothly, and is securely and firmly fixed.

[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 a concrete formwork assembled using the fastening fittings according to the embodiment, and Fig. 6 shows a concrete formwork assembled using a fastening fitting other than the third embodiment of the present invention. Fig. 7 is a side sectional view of a concrete form assembled using the fastening fittings according to the fourth embodiment of the present invention, and Fig. 8 is a side sectional view of the state according to the fifth embodiment of the present invention. It is a side sectional view of the state where concrete formwork was assembled using the related fastening metal fittings. 1... Tightening rod, 4... Mounting metal, 6, 7... Presser foot, 8, 9... Recess, 10, 11... Touching surface, 1
2, 13... pin, 14, 15... spring,
20... Locking cam, 21, 22... Cam surface, 24
... Axis rod, 25 ... Separator, 26 ... Screw, A ... Weir plate, C, D ... Horizontal lumber.

Claims (1)

[Scope of utility model claims] The base of the tightening rod is equipped with a mechanism for attaching it to the weir plate with a separator, the intermediate part is provided with a mounting bracket that protrudes up and down, and the edge of the base is formed with a recess into which the horizontal material fits. The intermediate parts of the upper and lower presser feet, each having a contact surface provided at the tip end of the upper and lower opposing sides, are pivotally attached to the upper and lower protruding parts of the mounting brackets, respectively, with pins,
The upper and lower presser feet are pressed in opposite directions by springs so that their base sides open, and the cam surfaces that connect to the contact surfaces of the upper and lower presser feet are placed on the tip surfaces of the tightening rods, respectively, on the left and right sides of the upper and lower edges. A concrete formwork fastening fixture made by rotatably supporting the central part of a vertically long locking cam installed on the side.