JP2541660Y2 - Metal fittings for concrete formwork - Google Patents

Description

[Detailed description of the invention] [Industrial application field] In the invention, a concrete formwork which is assembled oppositely so as to form a concrete placing space is fixed between right and left concrete formworks in order to immovably fix the concrete formwork. TECHNICAL FIELD The present invention relates to a metal fitting for concrete formwork that is connected in a pulling manner, and more particularly, to an improvement of an intermediate bar used in the middle of the metal fitting.

[Prior Art] A concrete formwork fitting comprising a pair of fittings which are engaged and attached between upper and lower joint surfaces of a concrete formwork and an intermediate bar which is interposed between the pair of fittings via a pin so as to be detachable. No. 55-44117, No. 57-44029, No. 60
No. 9334 and Japanese Utility Model Application Laid-Open No. Sho 54-88156, which have been known before this application. The intermediate bar of the known concrete formwork fitting is a long object of a fixed length of 2 meters or 3 meters, and can be pin-joined with a pin hole formed on the connection portion side of the mounting fixture over its entire length in the longitudinal direction. And a large number of pin holes are formed at predetermined intervals.

[Problem to be solved by the invention] According to such a conventional intermediate bar, since it is a rod-like body made of one straight rigid body, it is necessary to carry and handle other long objects such as 2 meters or 3 meters. Due to various difficulties in management, etc., the maximum length is usually limited to about 3 meters, and if a length of 5 meters or more than 6 meters is required, immediate response is required. However, there was a problem that the operation was extremely difficult and the cost was extremely high. Also,
The method in which the two intermediate bars are fixedly connected with the joint fitting has a problem that the disassembly and assembly are troublesome and inconvenient in handling.

The present invention has been made in view of the above-mentioned problems of the prior art.
When it is stretched horizontally using the intermediate bar of a book, it becomes a short length that is held in a horizontal straight state and folded in half like a single long intermediate bar, so that it is easy to carry and handle, and it is inexpensive and highly practical. It is an object of the present invention to provide a concrete formwork fitting.

[Means for Solving the Problems] In order to achieve the above object, a concrete formwork fitting of the present invention comprises a pair of right and left mounting fittings 1.1 inserted and locked between abutting end faces of a concrete formwork. Part 2.2
And an intermediate bar 4 which is detachably connected via a pin 3.3.
Is divided into at least two or more parts, and the joint is pin-joined with a joint fitting 5. The joint fitting 5 is formed in the same U-shaped cross section as the intermediate bar 4, and the U-shaped groove bottom is formed. Notch grooves 5b and 5b are formed at both ends of the intermediate bar 4 so that the intermediate bar 4 can be bent and extended so as to be folded in two by pivoting only downward from a horizontal straight state with the hinge pin 6 of the intermediate bar and the joint fitting 5 as a fulcrum. And the joint fitting 5 has an intermediate bar 4 at an intermediate side position thereof.
An engagement projection 9 is provided for positioning when straightened, and the pin hole 7 of the intermediate bar 4 and the pivot hole 8 of the joint fitting 5 are pivotally connected with the hinge pin 6.

[Operation] As shown in FIGS. 1 and 2, two intermediate bars of length L 4.
When 4 is connected and extended by the joint fitting 5, the length is doubled to form one straight intermediate bar of 2L. When the two intermediate bars 4.4 are extended horizontally, the rear end edge 4b of the intermediate bar is supported by the engaging projection 9 and the lower end 4c of the intermediate bar is also supported by the bottom 5c of the joint fitting 5, as shown in FIG. To be done 1
It is held in a horizontal straight state like a long intermediate bar. When the two intermediate bars 4.4 are pivoted downward through the hinge pins 6.6 of the joint fitting 5 and bent in two,
As shown in FIG. 3, the length is the length L of one original.
When the intermediate bar is bent in two, as shown in FIG. 4, the lower edge 4d of the intermediate bar is fitted into the cutout groove 5b and is supported by the groove end 5d.

When a large number of intermediate bars are stored or transported together, they are folded in two. Also, when using it on site, stretch it straight and cut it to the required length.

The mounting brackets 1.1 are engaged with and fixed to the left and right mold frames 10.10, and the respective connection portions 2.2 and both ends of the intermediate bar 4 are connected by pins 3.3. Adjustment and fine adjustment of the length are performed by changing the position of the pin.

[Example] The intermediate bar 4 is formed by bending a steel plate into a U-shaped cross section.
A flange 4a, 4a extending left and right is provided integrally at the upper end. Tsuba 4a.4a
May not be provided. The middle bar without collar is U
Increase the width of the groove and narrow the width if it has a flange.

A pin hole 7 is provided in the side surface of the intermediate bar 4 so as to penetrate left and right. The pin holes 7 are formed over the entire length of the intermediate bar 4 at a pitch different from the pitch of the pin holes 3a of the connecting portion 2 of the mounting bracket 1.

The joint fitting 5 is formed by bending a steel plate so as to have the same shape as the intermediate bar so as to have a U-shaped cross section.
a.5a is provided. The hinge pin 6 of the joint fitting 5 is the head
The two intermediate bars 4.4 are permanently attached by caulking the end 6b with a rivet having 6a. The rivet is caulked loosely and usually does not come off without permission, but it can be pulled out by hitting it from the end 6b side with a hammer or the like at the site.

At the bottom of the U-shaped groove of the joint fitting 5, cutout grooves 5b and 5b are formed at both left and right ends. When the intermediate bar 4.4 is bent downward via the hinge pin 6.6, the notch groove 5b.5b allows the intermediate bar 4.4 to bend at a required angle by contacting the groove bottom.

In addition, the joint fitting 5 is provided with an engagement projection 9 for positioning so as to maintain the straight state when the intermediate bar is straightened. The position and shape of the engagement projection 9 are appropriately changed depending on the shape of the intermediate bar, the position of the hinge pin 6, and the like.

The length L of the intermediate bar 4 is 1500mm, 2000mm, 2500mm, 30
00mm or the like, joints of the same length or different ones are selected and jointed.

[Effects of the Invention] In the present invention, as described above, the joint fitting 5 is formed to have the same U-shaped cross section as the intermediate bar 4, and the notch grooves 5b and 5b are formed at both ends of the U-shaped groove bottom. The bar 4 is configured so as to be able to bend and extend so as to be folded only by pivoting only downward from a horizontal straight state with the hinge pin 6 of the intermediate bar and the joint fitting 5 as a fulcrum.
Is provided with an engagement projection 9 at the intermediate side surface position for positioning when the intermediate bar 4 is straightened.
Since the pin hole 7 of the joint fitting 5 and the pivot hole 8 of the joint fitting 5 are pivotally connected with each other by the hinge pin 6, even an intermediate bar having a short unit length is turned downward from horizontal through the hinge pin of the joint fitting. Moved and joined so that it is folded in two,
When it is extended, it becomes twice or more than two times longer, and it is maintained in a horizontal straight state like a single long intermediate bar. It can be used effectively without any strength problems, and if it is folded in two, it will be shortened to half or less, making it easy to handle when storing or transporting many at once. Become. The manufacturing process is also simplified, productivity can be significantly improved, and the cost can be reduced.
In operation, since it can be easily and quickly extended and shortened with one touch, the operation is easy, and a practically excellent effect such as an increase in work efficiency can be expected.

[Brief description of the drawings]

FIG. 1 is a side view of a state in which the present invention is used for a concrete formwork, FIG. 2 is a plan view of the same, FIG. 3 is a side view of an intermediate bar in a state of being folded in half, and FIG. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, and FIG. 6 is a perspective view of the joint fitting. DESCRIPTION OF SYMBOLS 1 ... Mounting bracket 2 ... Connecting part 3 ... Pin 4 ... Intermediate bar 5 ... Joint fitting 6 ... Hinge pin 7 ... Pin hole 8 ... Pivot hole 9 ... Coupling protrusion

Claims (1)

(57) [Scope of request for utility model registration] 1. A pin 3.3 is connected to a connecting portion 2.2 of a pair of right and left mounting brackets 1.1 inserted and locked between contacting end surfaces of a concrete formwork.
The intermediate bar 4, which is detachably connected via the joint, is divided into at least two or more parts, and the joint portion is pin-joined with a joint metal member 5. The joint metal member 5 has the same cross-section as the intermediate bar member 4. U-shaped, and the U
Notch grooves 5b and 5b are formed at both ends of the bottom of the U-shaped groove, and the intermediate bar 4 is connected to a hinge pin 6 between the intermediate bar and the joint fitting 5.
Is pivoted only downward from the horizontal straight state with the fulcrum as a fulcrum, and is bent and stretched so as to be folded in two, and the joint fitting 5 is positioned when the intermediate bar 4 is straightened to the intermediate side surface position. And a pin hole 7 of the intermediate bar 4 and a pivot hole 8 of the joint fitting 5 are pivotally connected to each other by a hinge pin 6.