JPS6329787Y2 - - Google Patents

Description

[Detailed description of the invention] This type of concrete formwork clamping tool has a vertically long locking cam attached to the tip of the clamping rod so that it can rotate freely, and the locking cam can be rotated to stand up. In the case where the upper and lower presser feet are fixed at the upper and lower edges, there is no flexibility in the rotation of the presser feet, so if the positions of the separators, which are arranged in parallel at appropriate intervals in the horizontal direction, are slightly misaligned up and down, , it is difficult to operate the locking cam, and the tightening fittings are strained.

On the other hand, the locking cam gradually rotates in the direction of returning to the lying position due to concrete pouring and vibrations caused by a vibrator, etc., and if the locking cam returns to the lying position, the fixation of the presser foot will be released. This causes the horizontal timber to fall. Especially if the horizontal beam is a round pipe,
If the presser feet do not hold down the crossbeams, the crossbeams will fall and the weir plate will not be able to be supported, leading to the formwork collapsing and making it impossible to install the crossbeams. There are drawbacks such as.

Therefore, in order to eliminate the above-mentioned defects, this invention has a vertically long hole in a vertically long locking cam that fits between the upper and lower presser feet that are rotatably supported on the upper and lower protrusions of the mounting bracket to fix the presser feet. By providing a long hole and loosely fitting the long hole into the tip of the tightening rod, even if the mounting positions of the many horizontally arranged tightening metal fittings are slightly shifted up and down, the locking cam will lengthen according to the shift. raised or lowered by holes;
Regardless of vertical misalignment of numerous fasteners,
In addition to being able to securely press and hold the upper and lower horizontal materials with the upper and lower presser feet of all the clamping fittings, the locking cam is equipped with an operating piece with a stopper on the side that locks against the side of the presser foot. The locking cam is provided with an elastic body to prevent the locking cam from turning too far to the opposite side, allowing the locking cam to be easily rotated and properly erected. Concrete that prevents the mounting and locking cams from rotating back in the direction of collapse due to vibrations during work, making it easy to operate and always assembling and holding the formwork accurately, improving work efficiency. This relates to formwork tightening fittings.

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 screw hole 2 is provided in the center of the base end surface. is installed, and both side fittings 3 are made to protrude vertically from the middle part and are fixed with pins 4.
Reference numerals 5 and 6 designate a pair of presser feet arranged vertically symmetrically, with arch-shaped recesses 7 and 8 provided on the base side edges, and abutment surfaces 9 and 10 provided on the distal ends of the vertically opposing sides, respectively. Attach the middle parts of metals 5 and 6 to both side mounting metals 3 respectively.
Pin 1 fits between the upper protrusion and the lower protrusion.
Pivotally connected by 1 and 12. Reference numeral 13 designates a vertically elongated presser foot locking cam, which has cam surfaces 14 and 15 connected to the contact surfaces 9 and 10 of the presser feet 5 and 6, respectively, on the left and right opposite sides of the upper and lower edges, and operation pieces 16 with stoppers on both side edges.
are installed so as to protrude to the side opposite to the cam surfaces 14 and 15, respectively, and a vertically elongated hole 17 is bored in the center part. 1
8 is an arc-shaped leaf spring, and 19 is a presser washer. Then, the longitudinal hole 17 of the locking cam 13, the center hole of the leaf spring 18, and the presser washer 19 are fitted to the tip of the tightening rod 1 in order, and the stop ring 20 is installed at the tip of the tightening rod 1. death,
The locking cam 13 is fitted onto the tightening rod 1 so as to be rotatable and movable up and down, and is pressed toward the base side by the leaf spring 18 to form a tightening fitting a.

Reference numeral 21 designates a separator, which has screws 22 installed at both ends thereof and a stopper 23 at its base end, and a terminal 24 is screwed into the screw 22 up to the stopper 23. A is a weir plate that constitutes the concrete formwork, and through holes 25 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 22 at both ends of the separator 21 with terminals 24 into the through holes 25, screw the screw holes 2 of the clamping rod 1 into the protruding parts of the screws 22, and connect the terminals 24 and the clamping rod. The weir plate A is held between the screws 1 and 1, and the presser feet 5 and 6 of the clamping fitting a are directed in the vertical direction. Thereafter, the locking cam 13 is rotated about the tightening rod 1 and is brought down as shown in FIG. 4.

Therefore, after arranging the vertical flaps B on the outer surface of the weir plate A, the presser feet 5 of the clamping fittings A arranged in a suitable number in the horizontal direction are rotated as shown in FIG. 1 of the horizontal material C by passing it into the recess 7 toward
When the corners are fitted and then the horizontal flap material C is moved inward and downward, the horizontal flap material C and several presser feet 5 are integrated with the pin 11 as a fulcrum, and the arrow in FIG. 4 is formed. As shown in FIG. 1, the other flat part of the horizontal flap member C comes into contact with the vertical flap member B and is held in this abutting state.

Next, as shown in FIG. 4, rotate the appropriate number of presser feet 6 of the above-mentioned clamping fittings a to direct the concave portions 8 downward, and pass them into the concave portions 8 to tighten one corner of the horizontal material D. , and then lift the horizontal flap material D inwardly and upwardly, so that the horizontal flap material D and several presser feet 6 move in the direction of the arrow in FIG. As it rotates, the other flat part of the horizontal flap member D comes into contact with the vertical flap member B as shown in FIG. Therefore, Yokobata material D
While holding the locking cam 13 in the lifted state, move the locking cam 13 from the above state using the operating piece 16 with the stopper in the clockwise direction in FIG. When the protruding stopper of the operation piece 16 is rotated until it touches the side surface of the presser feet 5 and 6 and raised, the cam surface 1 of the locking cam 13
Due to the guiding action of 4, 15, the upper and lower edges of the presser foot 5,
The locking cam 1 is connected to the contact surfaces 9 and 10 of 6, respectively.
3 fits between the contact surfaces 9 and 10, thereby fixing the presser feet 5 and 6, and the terminal 24 and the presser feet 5 and 6 clamp the weir plate A and the vertical and horizontal flap materials B, C, and D. The locking cam 13 is tightened and fixed together, and the spacing between the weir plates A on both sides is maintained at a predetermined value.
It is pressed and supported by the mounting metal 3 by the elasticity of the mold, thereby forming a formwork.

At this time, in the case of the fastening fitting a whose mounting position is slightly shifted vertically with respect to the horizontal members C and D, the locking cam 13 is raised or lowered by the elongated hole 17 as appropriate depending on the shift. While the cam surface 14,
Due to the guiding action of 15, the upper and lower edges are joined to the abutment surfaces 9 and 10 of the presser feet 5 and 6, respectively, and the locking cam 13 is fitted between the abutment surfaces 9 and 10 to operate in the same manner as described above.

Therefore, after constructing the concrete wall E by pouring concrete in the space surrounded by the weir plate A, when dismantling the formwork, use the locking cam 13 as the fulcrum and the tightening rod 1 as shown in Fig. 2. Rotate counterclockwise and lower as shown in Fig. 4 to release the fixation of the presser feet 5 and 6, and operate in the opposite direction to the above to successively flatten the 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.

In addition, instead of the separator 21 with the terminal 24 described above, a separator with a conical terminal formed 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 22 of the separator 21 up to the stopper 23 is used. When using , it works in the same way as above.

In addition, for formwork that uses metal weir plates,
Instead of the screw hole 2 of the tightening rod 1 of the above-mentioned tightening fitting a, the base end of the tightening rod 1 is attached to a weir plate with a separator that is inserted into a hole in a metal weir plate edge frame, reinforcing beam, etc. When the hooking piece of the mechanism is installed, the hooking piece can be hooked into the hole of the metal weir plate, the fastening fitting a can be attached to the weir plate with the separator, and it can be used in the same manner as described above.

The second embodiment of the present invention shown in FIG. 5 has a recess 26 into which the locking cam 13 enters when it is laid down, in the center of the front end side of the fitting 3 of the fastening fitting a in the first embodiment. It was established.

In this structure, when the locking cam 13 is laid down, it enters the recess 26, and the elasticity of the spring 18 does not act on the locking cam 13, so that the locking cam 13 is in a floating state on the tightening rod 1. On the other hand, when the locking cam 13 is rotated to stand up, the locking cam 13 moves onto the edge of the tip side of the mounting bracket 3 against the elasticity of the spring 18, and the locking cam 13 is pressed and supported by the mounting bracket 3 by the elasticity of a spring 18.

Therefore, since the locking cam 13 is in an idle state until just before it is raised, the rotation when raising it,
Also, the vertical movement of the locking cam 13 in the fastening metal fitting a whose mounting position is vertically shifted with respect to the horizontal members C and D is made smooth, and the operation of raising and rotating the locking cam 13 is always easy and easy. can be done.

In the third embodiment of the present invention shown in FIG. 6, only the horizontal flaps C' and D' of the round pipe are used instead of the vertical and horizontal flaps B, C, and D of the triangular pipe in the first embodiment. In place of the clamping rod 1 in the first embodiment, a short clamping rod 1' corresponding to the horizontal beams C' and D' is used, and on the other hand, presser foot 5,
6, the clamping fitting a' is constructed by attaching presser feet 5' and 6' whose arcuate recesses 7 and 8 are formed into arcuate recesses that engage with a round pipe.

In this structure as well, the formwork can be constructed by tightening the weir plate A and the cross members C' and D' in the same manner as described above.

A fourth embodiment of the present invention shown in FIGS. 7 and 8 uses an elastic plate instead of the leaf spring 18 in the first embodiment to prevent the locking cam 13 from rotating naturally. , a vertically elongated elastic plate 27 made of rubber, soft synthetic resin, etc., and having a central hole slightly smaller than the shaft diameter of the tip of the tightening rod 1, is inserted into the center hole that fits into the tip of the tightening rod 1. is held by the perforated vertically long flat seat plate 18 and the vertically long U-shaped seat plate 19, and the center hole thereof is fitted to the tip of the tightening rod 1, and the center hole of the vertically long elastic plate 27 is inserted into the tightening rod 1. A retaining ring 20 is attached to the tip of the tightening rod 1 by pressing it against the clamping rod 1.

Also in this structure, the locking cam 13 is
The elastic plate 27 is operated by the operation piece 16 with a stopper.
Since it will not rotate unless operated with a force greater than the frictional resistance of the clamping rod 1, it will not rotate naturally and will act in the same manner as described above.

Since the present invention has the concrete formwork clamping fixture configured as described above, the horizontal beams can be fitted into the recesses of the presser feet of an appropriate number of clamping fixtures and moved in the direction of the clamping rod. This allows the presser feet of several clamping fittings to rotate integrally with the horizontal bar material, allowing the horizontal bar material to be installed.After that, all that is required is to rotate the locking cam. The locking cam makes it extremely easy to fix and release the upper and lower presser feet, making assembly and disassembly of the formwork simple and quick, and the horizontal material is always held at a fixed position without tightening the upper and lower clamps. Therefore, the horizontal beams evenly contact the weir plate over the entire surface of the formwork, and 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 a concrete surface with high precision.

Furthermore, since the locking cam is provided with an operating piece with a stopper, the locking cam can be rotated easily and quickly by pinching the operating piece. Since it does not turn to the opposite side from the state in which it touches and stands up, the rotation operation can be performed easily and accurately.

Furthermore, when the locking cams are raised and the upper and lower presser feet are fixed, the locking cams are pressure-supported by the elastic body and do not rotate naturally. There is no fear that the locking cam will rotate back in the direction of collapse due to vibrations caused by knocking down concrete or vibrations from the vibrator, and the upper and lower pressers are securely fixed, allowing you to assemble the formwork with peace of mind. Since a vertically long hole was provided in the vertically long locking cam and the long hole was loosely fitted into the tightening rod, the tightening fittings that were installed horizontally in appropriate numbers to fix the horizontal beams were slightly shifted vertically. Even when the locking cam is moved upward or downward depending on the deviation, the upper and lower edges are joined to the contact surfaces of the upper and lower presser foot by the guiding action of the upper and lower cam surfaces, and the locking cam is moved upward or downward. fits between the abutment surfaces of the upper and lower presser feet, thereby fixing the upper and lower pressers. Especially when the horizontal material is a round pipe, even if the clamping fittings are slightly shifted up and down, all the tightening The upper and lower presser feet of the fastening brackets will engage properly with the horizontal strips, and the upper and lower pressers of all the clamping brackets will always properly engage the horizontal strips, regardless of the vertical deviation of the clamping brackets. The formwork can be assembled reliably by fitting into the upper and lower horizontal members, and is easy to operate, improving work efficiency, and has a simple structure that can be manufactured easily and inexpensively. There is an effect.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side 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 an exploded slope. 4 is an explanatory side cross-sectional view showing the state of the concrete formwork assembly, FIG. 5 is a side view of a fastening fitting according to the second embodiment of the present invention, and FIG. 6 is a third embodiment of the present invention. Side sectional view of the concrete formwork assembled using the fastening fittings according to the example, No. 7
The figure is a side sectional view of a concrete form assembled using a fastening fitting according to a fourth embodiment of the present invention.
FIG. 8 is an exploded perspective view of the fastening fitting. 1... Tightening rod, 3... Mounting metal, 5, 6... Presser foot, 7, 8... Recess, 9, 10... Touching surface, 1
1, 12... Pin, 13... Locking cam, 14, 1
5...Cam surface, 16...Operation piece with stopper,
17... Vertical hole, 21... Separator, A...
Weir board.

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, 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 middle portions of the upper and lower presser feet, each having a contact surface provided on the tip end of the upper and lower opposing sides, are pivotally attached to the upper and lower protruding portions of the mounting brackets using pins, respectively, and the tip of the tightening rod is , a cam surface is formed on the left and right opposite sides of the upper and lower edges to be connected to the contact surfaces of the upper and lower presser feet, and an operating piece with a stopper is installed on the side to stop the rotation by applying to the side of the presser foot. A concrete formwork tightening fixture which is loosely fitted into a vertical hole of a vertically long locking cam so as to be freely rotatable and vertically movable, and an elastic body is attached to the tip side of the locking cam to prevent the natural rotation.