JPH0619713Y2 - Formwork holding device for construction - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is used for constructing a concrete building, and connects a concrete plate serving also as a formwork with a formwork to hold the formwork in a predetermined position. The present invention relates to a mold holding device.

(Prior Art) In recent years, in the construction of concrete buildings, the formwork is held at a predetermined position by the steps described below. That is, an exterior material such as tiles is spread in advance on a horizontally provided base plate, and a large number of sets of three rebars bundled in a triangular cross section through horizontal rebars are arranged in parallel.
After that, each one of the reinforcing bars of each set is exposed, and concrete is poured into the precast concrete plate. The precast concrete plate thus made is erected so that the reinforcing bars are in the vertical direction with the exterior surface as the outer side, and a space is provided on the back surface. Place the molds side by side. Further, after arranging required reinforcing bars between the formwork and the concrete plate, an integral building wall portion filled with concrete is formed.

In this case, the holding of the formwork is carried out by attaching several metal fittings to each of the reinforcing bars arranged in parallel along the back surface of the concrete plate by welding in advance, and connecting the formwork connecting bolts to these metalwork to formwork. The method of tightening and fixing is common.

(Problems to be solved by the invention) This welding is usually performed after the concrete plate is erected, but this is inconvenient in terms of workability and work procedure. However, attaching the concrete plate at the time of manufacturing has a disadvantage in that it interferes with the subsequent transportation and installation of the concrete plate, and it takes time and effort to set the positional relationship with the formwork. There is also a drawback that the fixing stability cannot be obtained only with the connecting bolts.

Therefore, it is an object of the present invention to provide a building form holding device for a building, which can be easily connected to the form without using welding even after the concrete plate is erected, and can be stably fixed. Is.

(Means for Solving the Problems) In order to achieve the above object, the formwork holding device of the present invention is a building formwork holding device that is fixed to a reinforcing bar and holds the formwork. A pair of side plates, a main body having a connecting portion for integrally connecting the side plates, a fixing means provided on the connecting portion for elastically fixing the main body to the reinforcing bar, and one end of the connecting portion. A rod for connecting the molds, the other end of which is engaged with the mold and the other end of which is connected to the mold. The side plates are provided with cuts extending from the one edge portion in opposite directions by a predetermined distance so as to face each other. It is characterized in that the rebar is inserted into the notch and the holding device is fixed to the rebar by the fixing means to hold the formwork.

(Operation) Since the fixing means for elastically fixing the main body to the reinforcing bar is provided,
Welding for fixing is unnecessary in the field.

(Embodiment) An embodiment of the mold holding device of the present invention will be described below. still,
The same parts are denoted by the same reference numerals in the drawings. FIG. 1 is a view showing an embodiment of the present invention, which is a form holding device 50.
Comprises a body 1, fixing means or rubber 13 and rods or bolts 9. The main body 1 is composed of two side plates 3 and 5 facing each other and a connecting portion 7 which is integral with both side plates and connects both side plates. The distance d between the side plates 3 and 5 is such that the reinforcing bar 10 (Fig. 6) is inserted, so
It is set wider than the width of. The distance d may be set to be slightly wider as the distance from the connecting portion 7 increases.

The connecting portion 7 is composed of a hole 7 a, a nut 11 and a cylindrical member 8. A cylindrical member 8 having a threaded inner peripheral surface is fixed to the hole 7a together with a nut 11 by spot welding. One end of a bolt 9 for connecting the formwork is screwed into the cylindrical member 8. The other end of the bolt 9 is provided with a threaded portion 9a. A rubber 13 having large and small cylindrical portions is fitted into the hole of the nut 11 as shown in FIG. Rubber 1
Reference numeral 3 is for ensuring the holding, that is, the fixing of the reinforcing bar, and its shape can be arbitrarily changed. Further, an elastic member other than rubber, such as a spring, can be used.

However, the tip of the rubber 13 must slightly project into the axial space of the notch (described later) whose inner part is circular, as can be seen from FIG. The reason for this will be explained with respect to the operation of the form supporting apparatus of the present invention described later.

The rod 9 does not necessarily have to be fixed to the connecting portion by screwing, and may be fixed by another method.
Therefore, in that case, the inner peripheral surface of the cylindrical member 8 does not need to be threaded, and the nut 11 may be a simple cylindrical member.

Next, the side plates 3 and 5 will be described with reference to FIG. As can be seen from the side view of FIG. 2, the side plate 3 has notches 17 which extend from one side portion at a predetermined interval and into which the reinforcing bars 10 are inserted.
Is provided, and the inner portion of this cut is formed as a circular portion 15. The circular part 15 has a notch 1 as shown in the drawing.
7 is slightly offset to the outside and has a bulge portion 15a.

The side plate 5 has a similar structure, and has a notch 19 extending from a side portion that does not face the side portion where the notch 17 is provided. Similar to the side plate 3, the rear part of the notch 19 is formed with a circular portion 16 which is also slightly outwardly displaced and has a bulge portion 16a. Both the bulge portions 15a and 16a are provided so that the reinforcing bar 10 is seated thereon at the initial stage of inserting the reinforcing bar 10 so that the reinforcing bar 10 does not easily drop out. The circular portions 15 and 16 do not necessarily have to be circular, but other shapes such as a quadrangle,
The shape may be an ellipse or the like.

When viewed from the side, the side plates 3 and 5 share a pair of opposite sides and are parallelograms with the other opposite sides intersecting. That is, both side plates are different from each other. The reason why such a special structure is adopted is to give the holding device 50 easy attachment to the reinforcing bar and strength, which will be described in detail later. The overall structure of the holding device 50 is well understood with reference to FIG.

Here, a method of forming the main body 1 from a strip plate, that is, a strip steel will be described. It should be noted that the respective dimensions appearing in the following description are given only as examples and do not limit the present invention.

In Fig. 4, the maximum width of the long side is 106 mm and the width of the short side is 38 mm.
2 is a plan view showing a substantially parallelogram main body 1 of FIG. 1, which has portions to be side plates 3 and 5 and a connecting portion 7 after molding. A cylindrical hole 7a having a diameter of about 11 mm is provided at a point symmetrical position of the parallelogram, and the side plates 3 and 5 are provided with cuts 17 and 19 substantially parallel to the opposite sides 1a and 1b. Both cuts extend from the other opposite side of the parallelogram facing each other. Cut 1 as already explained
The interior of 7 and 19 is circular. Other configurations are as described above. The extending distance of the circular portions 15 and 16 is preferably about half of the short sides 1a and 1b. This is because if the width T is too short, the strength of the holding device 50 decreases. Also, as shown in FIG. 5, the main body 1
Has a thickness of 6 mm. This thickness can be arbitrarily set depending on the economical efficiency and strength.

Next, the main body 1 is molded by ordinary press molding. First, the main body 1 is arranged in a plane on a female die 35 having a concave portion with a width of 25.5 mm, and press-molded from above with a male die 31 having a convex portion 33 with a width of 15 mm in the direction of the arrow.

Alternatively, in FIG. 4, the side plates 3 and 5 and the connecting portion 7 may be formed as separate bodies, and they may be formed into an integral member by a method such as welding.

When pressing, be careful of the circular portion 15 of FIG.
And 16 and the straight lines connecting the centers A, B and C of the holes 7a are aligned with the width direction of the recess of the press.
By pressing in this way, the longitudinal edges of the main body 1 line up neatly after molding.

Next, with reference to FIGS. 6 and 7, a process of fixing the mold holding device 50 of the present invention to the reinforcing bar 10 will be described. First, the rebar 10 is inserted between the side plates 3 and 5, and the notch 17,
Align with the open edge of 19.

After that, when the main body 1 is rotated 90 degrees so that the reinforcing bar 10 is inserted into the notches 17 and 19, the reinforcing bar 10 is rotated by 90 degrees in a direction in which the reinforcing bar 10 is inserted into the notches 17 and 19.
5 and 16 are inserted. At this time, the rubber 13 protruding into the circular portion is in a state of pressure contact with the inserted rebar 10, and the rubber 13 contracts by receiving a pressing force from the rebar 10, so that the elastic force causes the rubber 13 to repel the rebar 10. give. As a result, the reinforcing bar 10 is securely fixed to the main body 1.

FIG. 7 shows a state in which the side plates 3 and 5 of the main body 1 and the reinforcing bar 10 are at a right angle after the rotation. As described above, the circular portions 15 and 16 have bulged portions 15a and 1a.
Since 6a (not shown in FIGS. 6 and 7) is provided, the holding device 50 is slightly rotated in the process from the state of FIG. 6 to the state of FIG. 7, that is, in the initial state of rotation of the main body 1. Then, when the reinforcing bar 10 crosses the step portions 15b and 16b between the linear cut and the circular portion, the holding device 50 does not fall off.

After the reinforcing bar 10 is securely held by the main body 1, the form 30 is sandwiched and fixed between the nut 21 and the nut 23 screwed into the threaded portion 9a provided at the other end of the bolt 9. Therefore, when adjusting the distance between the reinforcing bar 10 and the form 30, the positions of the nut 21 and the nut 23 may be changed. Further, this distance can be freely changed by appropriately changing the length of the bolt 9.

It is also possible to connect a plurality of rods each having an internal thread at one end and an external thread at the other end in series to change the distance between the main body and the form.

Furthermore, although the rod is a bolt in the above-mentioned embodiment, rods other than bolts can be used. It goes without saying that the thickness of the rod body can be arbitrarily changed.

(Effect of the Invention) According to the form holding device of the present invention described above, the following effects can be obtained.

Since the side plate of the holding device has a unique structure, the strength of the whole holding device is increased.

Since there is no need to weld on site, the holding device can be attached to the rebar with one hand, improving work efficiency.

In addition, since it is provided with the fixing means, it is possible to provide the holding device which surely fixes the main body to the reinforcing bar.

[Brief description of drawings]

1 is a plan view showing an embodiment of the holding device of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a perspective view of FIG. 4 and 5 are views showing a process of molding the main body, FIGS. 6 and 7 are views showing a process of attaching the holding device of FIG. 1 to the reinforcing bar, and FIG. 8 is a shape of the elastic member. FIG. [Explanation of symbols of main parts] 1 ... Main body 3, 5 ... Side plate 7 ... Connecting portion 9 ... Bolt 10 ... Reinforcing bar 30 ... Form 50 ... Form holding device

Claims (4)

[Scope of utility model registration request] 1. A building form holding device for a building, which is fixed to a reinforcing bar and holds a form, a main body comprising a pair of side plates facing each other, and a connecting portion integrally connecting the side plates; Fixing means made of a rubber material for elastically fixing the main body to the reinforcing bar, and a rod body for connecting formwork, one end of which is engaged with the connecting part and the other end of which is connected to the formwork. And a pair of notches having a predetermined width, which are notched in different directions from the different edges of the pair of side plates, respectively, and the notches of the notches provided at the ends of the notches. A retainer that is provided at the boundary between the inner part having a width wider than that of the inner part and the inner part and the notch and prevents the reinforcing bar from coming out of the inner part when the reinforcing bar is fitted into the inner part. A formwork holding device for construction, characterized by comprising: 2. The device according to claim 1, wherein the inner part is substantially circular. 3. The device according to claim 1, wherein the main body is formed of a strip plate. 4. The apparatus according to claim 1, wherein the pair of side plates have a substantially rectangular shape provided at mutually different angles.