JPS63161263A - Material connection apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete formwork whose length and width can be freely increased or decreased.

(Prior art) The formwork used for pouring concrete has conventionally been made by using a single piece of light-weight steel or two pieces in parallel as a piece of batting material, and connecting the pieces of batting material vertically and horizontally in a lattice pattern. They are formed by attaching weir plates to these bata materials, but the size of the formwork, that is, the length and width, must be set in accordance with the object to be constructed. Therefore, the bata material used for the formwork is prepared in several lengths, for example, several standard lengths such as 2 m, 3 m, and 5 m, and the standard bata is cut to the required length, rl. When assembling into the formwork, a plurality of regular-sized pieces are overlapped and spliced together, and the length of the overlap is adjusted to match the formwork dimensions.

(Problems to be Solved by the Invention) Conventionally, the overlapping and joining of bata materials in the formwork has been done by a simple connecting means such as sandwiching two bata materials with washers. The overlap joint part is
From a structural mechanics point of view, it is a discontinuous part of the beam, and it is almost impossible to transmit stress to each other, resulting in the problem that the formwork itself has low strength and rigidity. It has been considered unavoidable from an economic point of view, since it is destined to be used repeatedly for formwork. Therefore, since the play in a conventional simple jointed structure is discontinuous as a beam, the play in the formwork is calculated as a set of simple beams.

In recent years, formwork technology has been shifting to methods that use crane suspension or wheel movement, but in this case, the formwork has to be adjusted to prevent the large, heavy forms from breaking at the overlapping parts of the loose materials during handling. There is a growing demand for increasing the strength of the frame, and as a countermeasure, it is possible to cut it to fit the dimensions of the formwork or weld it together, and use a long continuous backing material at the overlapping part. This is the current situation. Since such seamless gutter material can be treated as a continuous beam supported by many fulcrums, the strength and rigidity of the formwork is significantly increased, and the amount of deflection of the gutter material during concrete pouring (formwork It also has the advantage of being able to keep the amount of deflection low.
It is very uneconomical to trim the gutter material to match the dimensions of the formwork or to fit the dimensions by welding and joining, and this results in a significant increase in the cost of the formwork.

The present inventor has been researching and developing large movable formwork for many years, and in order to construct a large frame that is light and heavy, easy to handle, and has great strength and rigidity, he cut and welded loose materials of standard length. To devise an extremely simple and inexpensive means of joining gutter materials without damaging the gutter materials, without any processing such as splicing, and without leaving any discontinuous parts in the joint. This has been a major issue.

The best way to use backwood as an expandable beam material is to align the axes of the backwoods and join them together. This requires a structure that allows for the insertion and removal of large and small diameter steel pipes. However, in this structure, a difference in level occurs at the joint, and a gap is created between the weir plate and the small diameter pipe section, which requires a lot of effort and is not practical. Therefore, we have been considering creating a stretchable beam with a structure in which single pieces of backlash 1a and lb are stacked together as shown in Figure 4. The problem with this structure is misalignment of the axes. As a member for connecting the single play materials 1a and 1b to each other, a glasses-like connector 12 having square holes 52L and 5b through which the single play materials 1a and 1b can be inserted, respectively, as shown in FIG. 5, was fabricated as a prototype. As shown in Fig. 6, we conducted an experiment on a joint structure using a plurality of these connectors 12 12', 12''. requires some play in order to slide, so if a load P is applied, this play becomes a problem, and as shown in Figure 6, the joint part shows a bent shape, and the result is not satisfactory. I can't get it.

The above-described misalignment of the axes due to overlapping generates torsional force in the ratchet material. As shown in FIG.
(downward), and the reaction causes the other backlash single material 1
A force is generated that pushes a in the opposite direction (upward), and these two forces become a moment M' and try to rotate the connector 12' in the direction of the arrow, so torsional stress is generated in the play members 1a and Ib. will occur.

The present invention can solve the above-mentioned problems of bending and torsional stress in the gutter material constructed by overlapping and splicing the gutter material, and has excellent strength and rigidity, as well as a simple structure and low cost. The purpose of the present invention is to provide a backing material connecting device that is inexpensive and allows easy splicing and expansion/contraction adjustment.

(Means for Solving the Problems) In the present invention, as a stretchable structure of the rattle material, single rattle members are overlapped and joined so that they can be slid and fixed, and a spectacle-shaped connector is used for this purpose. is necessary.

In addition, as a measure to prevent torsional stress due to misalignment of the axes of single pieces of play, a plurality of connecting tools 12', 12 are used to connect single pieces of play
(See Fig. 6). Then, a moment M° acts in the direction shown by the arrow in Fig. 7 at one coupling 12', but the moment M° acts on the other coupling 12'. At the point, a moment M'' in the opposite direction as shown in Fig. 8 acts, and these moments M',
M" will cancel each other out. Therefore, unless the deviation of the axes of the single gutter materials to be spliced is particularly large,
Since the load is shared with the weir plates and other backing materials, there is no problem in practical use. In this case, it is necessary that the cross-sectional shape of the gutter single material be square, and a round shape would be inconvenient.

Next, to solve the problem of bending of the backing material, it is necessary to connect the backing material and the insertion hole of the connector without any gaps. In that case, it is not a good idea to add bolt holes or other processing to the loose single material. Therefore, it is necessary to provide a push screw in the connector to firmly connect the play material and the connector.

Thus, as shown in FIGS. 1 and 2, which correspond to embodiments, the present invention has two square holes 5a and 5b spaced apart in parallel through which the rattle single materials 1a and Ib are inserted, thereby forming a glasses frame shape. The connecting tool 2 is formed by forming a push bolt 7゜7 into the frame body 3 and screwing it into each square hole 5a, 5b so that it can move forward and backward, and a plurality of connecting tools 2, 2 are arranged at intervals. Each square hole 5a, 5a,.

5b, 5b, the square cross-sectional backing materials 1a, lb are inserted in parallel, and the push bolts 7.7 are tightened to connect the connectors 2, 2 and the play single materials 1a, Ib to each other. This is a characteristic feature.

(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 3.

In FIGS. 1 and 2, Ia and lb are connecting materials, and lightweight square tubes are used. 2 is those backwoods 1a
, lb. As shown in the figure, it is formed in a rectangular frame 3 as a whole, and has a partition wall 4 provided in the center.
Rectangular holes 5a and 5b are formed in parallel through which the backing materials 1a and Ib are inserted, respectively. A screw hole 6.6 is provided in the frame body 3, and a push bolt 7.6 is provided in the screw hole 6.6.
7 are screwed together so that their tips can protrude into the square holes 5a and 5b.

The backing materials 1a and lb are connected using a plurality of the above-mentioned connectors 2. That is, as shown in FIGS. 1 and 2, for example, two connectors 2.2 are arranged at a required interval,
One backing material Ia is inserted into one of the square holes 5a, 5a of each pair of square holes, and the other backing material 1b is inserted into the other square hole 5b, 5b, and the push bolt 7.7 is screwed. Then, the tips of the blades are pressed against the backing materials 1a and lb to fix them.

The bag material connecting device of the present invention is configured as described above, and can be applied to connect various types of bag materials such as horizontal butterflies and vertical butterflies that support formwork. An example of this will be explained with reference to FIG. 3. In the vertical flap 8, two backing members 1a and Ib are connected in parallel with each other by a fixing member 9.9 such as a washer or a bolt/nut. On the other hand, the horizontal flap is the backing material 1a bonded according to the present invention.

Use 1b. The horizontal butterflies are vertically arranged in parallel at intervals and are fixed at their intersections with the vertical butterflies 8 using fasteners or the like. Then, the weir plate 10 is fixed and constructed against the horizontal backlash of these corners using fixtures 11 and 11, and a formwork is formed. In this case, the length of the horizontal flap can be changed by changing the length of the overlap at the connection point of the joined backing materials 1a and Ib, and therefore the length of the formwork can be changed in the length direction of the horizontal flap. It can be changed to some extent.

(Effects of the Invention) As explained above, the backing material connecting device of the present invention has two square holes through which the backing material is inserted, which are arranged in parallel and spaced apart to form a spectacle frame shape. A connector is constructed by screwing a push bolt that can move forward and backward into a square hole, and a piece of backing material with a square cross section is inserted in parallel into each of the square holes of the connector arranged at intervals, and the push bolt is inserted into the square hole. Since the connecting tool and the rattling single material are connected to each other by tightening them, many excellent effects are achieved as described below.

(1) The connector has a structure in which a partition is provided in a rectangular frame and a pair of square holes are formed, so it has high strength and rigidity, and a push bolt is screwed into each square hole. The buffing material inserted into the hole can be firmly tightened and fixed without loosening, and the buffing material can be prevented from twisting or bending as shown in Fig. 6 due to the axes of the buffing materials being separated from each other. able to resist well.

(2) The buffing materials can be connected using the connecting tool by simply passing the buffing materials through a square hole and tightening the push bolts, which not only simplifies the process of connecting the buffing materials, but also allows the buffing materials to be freely connected to each other. Since the buffing material can be connected at the points, the buffing material, which is a standard length material, can be formed into any desired length without cutting it.

(3) Since the backing material itself does not need to be processed for fixing, such as screw holes or notches, there is no risk of reducing the strength of the buffing material.

(4) Since there is no need to cut off the buffing material, there is extremely little wear and tear on the buffing material, and materials can be saved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the device of the present invention, Fig. 2 is a front sectional view thereof, Fig. 3 is a side view showing an example of a formwork using the present invention, and Fig. 4 is a buffing material connection. Fig. 5 is a cross-sectional view of the beam, Fig. 6 is a side view of the beam shown in Fig. 4, but does not show the loaded state, and Figs. 7 and 8 show the load state of the combined buffing material. It is a front sectional view explaining twist of. Ia, Ib... Buffing material 2... Connector 3... Frame
5a, 5b...Square hole 7...Press screw 8...Vertical flap 10...To the weir plate (q To 1 ^-" To □ f/La Fig. 8

Claims (1)

[Claims] Two square holes through which the Bata single material is inserted are arranged in parallel and spaced apart to form a spectacle frame, and a push bolt that can move forward and backward into each square hole is screwed into the frame to form a connector. , is characterized in that bata materials with a rectangular cross section are inserted in parallel into each square hole of a plurality of connectors arranged at intervals, and a push bolt is tightened to connect the connectors and the bata single material to each other. Bata material connecting device.