JPS5929089Y2 - Anchor for supporting concrete formwork - Google Patents

Description

[Detailed description of the invention] The present invention is designed to receive the concrete to be poured when constructing a concrete body of a desired height, mainly by pouring concrete in stages from the bottom to the top. A strip plate that is used to tensile support the formwork that holds it against the previously cast concrete part, and has a projecting tongue that exhibits pull-out resistance when inserted into the previously cast concrete part. A member for connecting the shaped anchor main body and the free end of the tensile resistant device connected from the formwork, and connected to the upper end of the anchor main body (the end exposed on the surface of the poured concrete part). The present invention relates to an improved concrete formwork support anchor comprising a tension-resistant connecting member.

The connecting member is bent to have a U-shaped cross section, thereby increasing the strength of the connection to the tension-resistant device compared to when the tension-resistant device is directly connected to the strip-like anchor main body. be.

The anchor must be inserted into the poured concrete part at a predetermined position a certain distance away from the formwork, but it is inevitable that it will deviate somewhat from the specified position, and if it is When the anchor is inserted and installed, a problem arises in that it becomes difficult to connect the tension-resistant device and the connecting member in a desired posture.

The present invention aims to provide an anchor that can solve this problem.

The anchor for supporting concrete formwork according to the present invention is characterized in that the connecting member is attached to the main body of the strip-shaped anchor so as to be freely rotatable around an axis perpendicular to the plate surface.

According to this, even if there is a construction error such as inserting the anchor at a position deviated from the set anchor insertion position, the connecting member can be rotated by the necessary angle around the axis relative to the main body of the anchor. With an extremely simple operation, the tension-resistant device can always be connected to this connecting member in the proper required posture, and the above-mentioned problem can be solved.
We were able to solve this problem with only very simple structural improvements.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a working state in which a concrete frame of a desired height is constructed by pouring concrete in stages from the bottom to the top.

Reference numeral 7 indicates a concrete formwork for producing the next concrete section above the previously cast concrete section 6, A indicates an anchor inserted and fixed into the cast concrete section 6, and 4 indicates a formwork. By connecting the free end of the tension-resistant device 4 to the anchor A, one of the lateral pressures of the concrete to be poured in the next stage acting on the formwork 7 can be reduced. It is not possible to burden the concrete part 6 via the tension-resistant device 4 and the anchor A.

As shown in FIGS. 2 and 3, the anchor A includes an anchor main body 1 in the form of a flat strip made of iron or steel, and a tension-resistant connecting member 2 made of a strip made of the same material bent into a U-shaped cross section. are pivotally connected at the upper end of the main body 1 via a pin 3 in a direction perpendicular to the plate surface for automatic rotation.

P indicates the axis of the pin 3. 1a... are tongue pieces that are integrally projected in a direction perpendicular to the plate surface at multiple locations above and below the insertion portion of the concrete portion 6 of the main body 1,
It exhibits pull-out resistance due to its engagement with the concrete portion 6.

Note that the main body 1 is inserted while the concrete portion 6 is in a semi-hardened state.

The connecting member 2 consists of left and right side wall portions 2A, 2A and a bottom wall portion 2B that connects them, but the bottom wall portion of the side wall portions 2A, 2a into which the main body 1 is fitted is cut out, so that the connection The member 2 is held in both positions when being transported along the main body 1 and in a position perpendicular to the main body 1 in which it is restricted by contact with a stepped portion 1b provided near the upper end of the main body 1 that can also be used for driving impact. 270
°Can be rotated.

The upper edges of the side wall portions 2A, 2A that do not fit into the main body 1 are respectively bent outward at 90 degrees to form reinforcing pieces 2A', 2A'.

Pin holes 2a, 2a are formed opposite to each other at the same phase in the side wall parts 2A, 2A, and a plurality of pin holes 2a, 2a are formed in the side wall parts 2A, 2A, and a plurality of pin holes are provided in the tension-resistant tool 4 formed in the shape of a strip inserted between the side wall parts 2A, 2A. One of the holes 4a and the opposing bottle hole 2
a and 2a are matched, and a pin 5 is inserted through these in common to connect the tension-resistant device 4 to the connecting member 2.

Both 2 and 4 always take the required linear posture.

Since the pin 5 is supported by the two side walls 2A, 2A, deformation of the pin holes 2a, 2a's periphery is reliably prevented.

If the main body 1 is inserted into the concrete part 6 out of position, the adjustment for connecting the pin 5 is as follows:
This is done by appropriately selecting the plurality of pin holes 4a.

FIG. 4 shows another embodiment in which a plurality of sets of opposing pin holes 2a, 2a are provided in the side walls 2A, 2A, and the spacing therebetween is different from the spacing between the pin holes 4a, 4a of the tension-resistant device 4. This allows fine adjustments to be made.

As shown in FIG. 5, the tension-resistant tool 4 is
It is also possible to construct the rod by bending it into a shape, and insert the free end 4b into a suitable opposing pin hole 2a, 2a.

Note that the number, shape, ejecting position, and ejecting direction of the tongue pieces 1a may be modified in any manner.

In addition, the structure of the connecting member 2 may have a U-shaped bent cross section or a threaded portion, and a rod-shaped tension-resistant member 4 may be attached to the connecting member 2.
It may also be of a type in which the free end screw portions of the screws are screwed together.

[Brief explanation of the drawing]

The drawings show an embodiment of the anchor for supporting concrete formwork according to the present invention, in which Fig. 1 is a longitudinal side view showing the state of use, Fig. 2 is a side view of the main part, Fig. 3 is a sectional view of the main part, and Fig. 4 The figure is a side view of a main part according to another embodiment, and FIG. 5 is a side view showing a modification of the tension-resistant tool. 1... Mainly band-shaped anchor, 1a...
Embossed tongue piece 1.2... Connecting member, 4...
・Tension-resistant tool, 6... Placed concrete part, 7
・・・・・・Concrete formwork.

Claims (1)

[Scope of utility model registration request] When inserted into the poured concrete part 6, it has a punched-out tongue piece 1a that exhibits pull-out resistance, and is connected to the end part exposed on the surface of the poured concrete part 6 from the concrete formwork 7. This is an anchor that tensions and supports the concrete formwork 7 by connecting the free ends of the tools 4, and the end of the strip-shaped anchor main body 1 has two circumferences around the axis perpendicular to the plate surface. An anchor for supporting concrete formwork, characterized in that the connecting member 2 to the tension-resistant device 4 is attached in a state where it can rotate in one direction.