JPH0629358Y2 - Nut locking device for tightening concrete formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a loosening preventive device for nuts for tightening concrete formwork used for assembling formwork for concrete construction.

(Prior Art) A conventional locking device for nuts for fastening concrete formwork of this type is not found.

(Problems to be solved by the invention) As shown in FIG. 6, when assembling a concrete construction form by tightening the nut of the fastener, the conventional metal press washer is used to remove the flat material. If the mold is constructed by pressing, there is a problem in that when the vibrator is applied to the mold after the concrete is placed, the nut for clamping the mold is automatically rotated by vibration and the tightening of the mold is loosened.

(Means for Solving Problems) Therefore, in order to solve the above problems, the present invention is
A box-shaped press washer (1) having an open front is provided with recesses (8) at the upper and lower portions of the front edge for engaging flap material (A), and a tightening rod (4) is provided at the center of the rear wall. ) Through the central hole (1
1) The through hole (10) is drilled at the positions corresponding to the recesses (8) in the upper and lower portions of the rear wall, and the press washer
(1) upper and lower locking pieces made of elastic material at the top or bottom of the inner surface at沿Tsuta form of (2), the shaft pieces projecting Jikuhen (16) respectively to the rear face center portion of (2) ( 16) provided Sutotsupa (15), presser washer (1 and inserted into the through hole (10) of Sutotsupa (15) with the shaft piece (16) a presser washer (1) above the locking piece (2) ) top and bottom to the top and bottom of the locking piece in the (2), (as well as fitting 2), respectively, the locking piece (2), a washer retainer (2)
(1) Properly project forward from the front to construct a slack prevention device for nuts for fastening concrete formwork.

(Function) The nuts (3) are screwed in by applying the front surfaces of the upper and lower loosening pieces (2) in the press washer (1) to the flap material (A), respectively.
When compressing same against locking piece (2) to its elasticity assembling the mold, locking piece (2) is compressed by the presser washer (1) in presses washer (1) Tobata material (A ) Is in close contact with.

Therefore, the mold is firmly assembled as in the conventional case, while the nut (3) is pressed by the press washer (1) and the tightening rod (4) due to the restoring elastic force of the locking piece (2) in the compressed state. Since it is elastically pressed and held by the screw (5), it does not loosen due to vibration or the like.

(Embodiment) The structure of one embodiment of the present invention shown in the drawings will be described. (1) is a metal press washer, which has a U-shaped cross section with an open front and is long in the vertical direction and has a rear wall. The upper and lower end portions are formed into a box shape that is bent forward (6), while the center portion when viewed from the front is configured into a box shape that is triangularly extended (7) to both sides. Then, arc-shaped recesses (8) are provided in the upper and lower portions of the front edge of the press washer (1) , and at the center of the recess (8), both sides of the press-in portion (9) having an arc-shaped cross section. To form a through hole (10) in the rear wall, while
In the center of the rear wall of the presser washer (1) in the up-down direction, the center hole (1
Wear 1). (2) and (2) are upper and lower loosening pieces that are respectively fitted into the upper and lower parts of the press washer (1) , which are made of an elastic material such as rubber, and are formed on the inner surface of the upper or lower part of the press washer (1). Referring to FIG. 3 to FIG. 5, the width is formed such that the upper half is equal and the lower half is widened downward. Then, the front surface becomes a concave arc surface (12) in the vertical direction, and a concave portion (1
3) is formed, and in the front-rear intermediate portions of both side faces, arcuate ridges (14) are provided which extend in the front-rear direction and both sides downward as the lower half extends downward, and the center of the rear face. The part is integrally provided with a shaft piece (16) having an umbrella-shaped stopper (15) formed in the middle part.

In FIG. 6, (3) is a nut, (4) is a tightening rod,
A screw hole (17) is provided at the center of the base end face and a screw (5) is formed at the tip end. Reference numeral (18) is a separator, and screws (19) are provided at both ends of the separator, and a stopper (20) is screwed to the base end of the screw (19).

(B) is a dam plate of the formwork, in which a through hole (21) is bored at an appropriate position. (C) is a vertical pipe material of a circular pipe applied to the outer surface of the barrier plate (B), and (A) is a horizontal pipe material to be combined with the outside of the vertical pipe material (C), and is composed of two round pipes. . (D) shows the wall of the concrete structure.

Next, the operation will be described. Hold the loosening prevention pieces (2) at the top and bottom of the presser washer (1) respectively.
(1) After inserted through the through hole (10) of the Sutotsupa (15) with the shaft piece (16) a presser washer (1) fitted in,該弛viewed locking piece (2) a presser washer (1) If the shaft piece (1) is pushed in and the tip projection of the shaft piece (16) is pulled out,
The umbrella-shaped stopper (15) of 6) is elastically restored by passing through the flexible through hole (10), and the protrusions (14) on both sides of the loosening prevention piece (2) come into contact with both sides of the inner surface of the press washer (1). At the same time, the both-side pushing portions (9) of the press washer (1) bite into the ridges (14) on both sides thereof, and the loosening prevention pieces (2) and (2) are pressed into the press washer (1) and fitted. Wearing and presser washer
(1) It is attached by projecting forward as appropriate.

Therefore, as shown in FIG. 6, the screw (19) of the separator (18) is attached to the through hole (21) of the dam plate (B) as shown in FIG.
The screw hole (17) of the tightening rod (4) into the protruding portion of the screw (19), and the dam plate (B) is attached to the stopper (20).
The weir plate (B) is built by being sandwiched by and the tightening rod (4).

Next, on the outside of the barrier plate (B), vertical and horizontal flap materials (C),
After combining (A), the nut (3) is screwed in, and as shown in FIG. 6, upper and lower loosening prevention pieces of the presser washer (1).
After the concave arc surface (12 ) of (2) hits the outer surfaces of the upper and lower round pipes of the flap material (A), the loosening prevention piece (2) is compressed while resisting its elasticity, and the press washer is pressed. (1) housed in, those connexion the butter material in a recess of the retainer washer (1) (8) Gabata material (a) by pressing the (a), Sutotsupa (20) and the pressing washer (1) The weir plate (B) and the vertical and horizontal flaps (C) and (A) are clamped and fixed by and to form a form.

Therefore, concrete is placed in the space formed by the dam plate (B), and a vibrator is applied to the formwork to construct the wall (D).

At this time, the nut (3) is elastically pressed and held by the press washer (1) and the screw (5) of the tightening rod (4) by the restoring elasticity of the loosening prevention piece (2) in the compressed state. The nut (3) is not rotated by the vibration and the tightening by the press washer (1) is not loosened.

The ridge (14) of the loosening prevention piece (2) may be a plurality of protrusions.

(Effect of the Invention) The slack preventing device for nuts for fastening concrete formwork of the present invention has the following remarkable effects.

(1) Upper and lower loosening pieces made of an elastic body are formed in a shape along the inner surface of the upper or lower part of the press washer, and a shaft piece with a stopper is provided at the center of the rear surface of the loosening piece. Since the loosening prevention piece is inserted into the through hole of the press washer and the loosening prevention piece is fitted inside the pressing washer, (a) the looseness prevention piece is securely attached to the pressing washer,
The locking piece does not come off from the press washer during handling, which is convenient for handling.

(B) It is extremely easy to assemble the press washer and the locking piece,
It is useful for work.

(2) A through hole is formed in the rear wall at positions corresponding to the recesses that engage with the flap material on the upper and lower portions of the press washer,
A stopper-equipped shaft piece protruding from the center of the rear surface of the loosening prevention piece is inserted into the through hole of the press washer to fit the loosening prevention piece into the pressing washer, and the loosening prevention piece is appropriately moved forward from the pressing washer. (A) The attachment of the locking piece to the press washer is stable.

(B) The anti-loosening piece deforms equally well in the vertical direction and its front surface makes proper contact with the outer surface of the flap material, and the flap material and the press washer are stable and smooth in the front-back direction of the mold clamping. Repulsive repulsion to keep the nut in good condition.

Therefore, even if a strong vibrator is applied to the mold after placing concrete, the nut will not rotate due to the vibration and the tightening of the mold will not be loosened, and the concrete wall will be accurately constructed to ensure the accuracy of the frame. be able to.

(3) It has a simple structure and can be manufactured easily and inexpensively.

[Brief description of drawings]

FIG. 1 is a side view of a concrete washer presser washer according to an embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is an enlarged side view of its loosening prevention piece, and FIG. 4 is a front view. FIG. 5 is a plan view, and FIG. 6 is a side sectional view of an essential part in a state where a concrete formwork is assembled using the presser washer. (1) ... presser washer, (2) ... loosening prevention piece, (3) ... nut, (4) ... tightening rod, (8) ... recess, (10) ... through hole,
(11) ... Center hole, (15) ... Stopper, (16) ...
Shaft piece, (A) ... Flap material,

Claims (1)

[Scope of utility model registration request] 1. A box-shaped press washer having an open front is provided with recesses for engaging flaps at the upper and lower edges of a box-shaped washer, and a central hole through which a fastening rod is inserted is provided at the center of a rear wall. , Through holes at positions corresponding to the recesses on the upper and lower portions of the rear wall,
A shaft piece is provided at the center of the rear surface of the upper and lower loosening stopper pieces formed of an elastic body along the inner surface of the upper or lower part of the press washer, and a stopper is provided on the shaft piece. The attached shaft piece is inserted into the through hole of the press washer, and the upper and lower loosening prevention pieces are respectively fitted in the upper and lower parts of the pressing washer, and the loosening prevention piece is appropriately forwardly arranged from the pressing washer. A loosening prevention device for nuts used to tighten concrete formwork.