JPH0342201Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a column formwork tightening device suitable for use when forming building columns by pouring ready-mixed concrete.

[Conventional technology]

Generally, when forming columns for a building, a column form is assembled and ready-mixed concrete is poured into the column form. In this case, when the fresh concrete is poured, the column formwork receives a load from the fresh concrete, so the column formwork is held by a tightening device from the outside.

Conventionally, the tightening device for column formwork consists of thick pieces of material with a socket formed at one end and multiple holes for driving wedges at the other end, which are sequentially arranged around the formwork. It is known that the end portions of the end pieces are made perpendicular to each other and secured with wedges.

That is, in the past, four pieces of thick material each having a socket at one end and a wedge-driving hole at the other end were arranged sequentially along the outer periphery of the formwork, and at this time, the wedge-driving holes were formed. The leading end of one end piece is inserted into the socket of the other end piece, and then a wedge is driven into the wedge driving hole located on the outer periphery of the socket and tightened.

Further, most of the column frame tightening devices formed as described above are made of iron.

[Problem that the invention attempts to solve]

However, in the case of the column formwork tightening device described above, it is not only difficult to insert the tip of one end piece into the socket of the other end piece so that they intersect perpendicularly, but also because the position of the socket is incorrect. They often shift due to backlash, and two adjacent end pieces may not be able to maintain a perpendicular angle. Therefore, in this state, the column formwork is deformed, and the column to be formed is also deformed. To prevent this, the position of the socket must be adjusted accurately, resulting in very poor work efficiency.

Furthermore, since the end pieces are made of iron and are long, they are quite heavy, making not only the above adjustment difficult but also extremely difficult to carry.

Therefore, in the column formwork tightening device described above,
It is extremely inefficient in terms of workability.

Furthermore, the column formwork tightening device, as described above,
Since this is a so-called wedge-type tightening method, when a vibration is applied to spread the concrete during concrete pouring, the wedge inserted through the wedge-driving hole comes out due to the vibration, and each end piece and column type are tightened. There is a fear that the frame will collapse.

Therefore, in view of the above-mentioned circumstances, the present invention makes it possible to easily orthogonally intersect the two end pieces, streamlines the tightening work of the column formwork, and further improves the efficiency of the tightening work of the column form. It is an object of the present invention to provide a new tightening device for column formwork that has no backlash at the locking part and also prevents end pieces from coming off due to vibration even if vibration is applied during concrete pouring. purpose.

[Means for solving problems]

In order to solve the above-mentioned problems, the structure of the column formwork tightening device according to the present invention is composed of a thick piece, a guide member, and a hook bolt, and the guide member connects the ends of the two guide pieces at right angles to each other. It consists of a guide joined together, a horizontal support plate joined to the upper and lower ends of each guide piece, and a guide hole provided in each guide piece, and two thick pieces inserted along the guide surface of each guide piece. are perpendicular to each other, the end hook of the hook bolt inserted through the guide hole is hooked into a locking hole provided in the thick material, and the other side of the hook bolt is fastened to each guide piece with a nut. It is.

[Effect]

Since the two end pieces inserted along the guide surface of each guide piece are perpendicular to each guide piece in advance, the right angle can be automatically obtained. At the same time, the tip of the hook bolt inserted through the guide hole is hooked into the locking hole provided in the thick material, and the other side of the hook bolt is fastened to each guide piece with a nut to strengthen the fastening at the relevant fastening part. This prevents play from occurring in the fastening portion.

Further, by strengthening the tightening of the fastening portion, it can sufficiently withstand vibrations that occur during concrete pouring, and there is no fear that the end pieces and column forms will collapse due to the vibrations.

〔Example〕

Hereinafter, the present invention will be explained based on the illustrated embodiments.

FIG. 1 shows the present invention in use. That is, the guide member 2
1. By firmly tightening the hook bolts 11 and nuts 14, the column formwork 20
The column formwork 20 is held in the shape of a rectangular column, and is able to sufficiently withstand vibrations generated during concrete pouring, thereby preventing the column formwork 20 from collapsing.

FIG. 2 shows in detail a preferred embodiment of the present invention, that is, a fastening section for tightening the column formwork 20.

The guide member 21 includes two guide pieces 1 each provided with guide surfaces 8a and 8b, as shown in FIG.
2, two upper and lower guide holes 6 provided in one guide piece 1, and two upper and lower guide holes 7 provided in the other guide piece 2. It is formed.

In addition, the top surface of the thick material 9a is on the bottom surface of the support plate 4.
The lower surfaces of the thick pieces 9b are in contact with the upper surface of the support plate 5, and the thick pieces 9a are moved along the upper part of the guide surface 8a.
One side of the round piece 9b is inscribed along the lower part of the guide surface 8b, and the bottom face of the round piece 9a is in contact with the upper surface of the round piece 9b. 9a and 9b are the guide members 21, respectively.
is inserted inside.

The thick end material 9a is connected to the guide surface 8a.
In this case, the thick end piece 9b is inserted along the guide surface 8b, and since the two guide pieces 1 and 2 are orthogonal to each other, the thick piece 9a and the thick piece 9b are perpendicular to each other. The guide member 21 is then inserted into the guide member 21.

A locking hole 13 is provided on the side surface of the end pieces 9a, 9b inserted into the guide member 21.
A plurality of, for example, four, are disposed on both sides, and a hook portion 12a, which is the tip of the hook bolt 12, is inserted into the locking hole 13 disposed on the side surface of one thick member 9a, and the hook portion 12a, which is the tip of the hook bolt 12, is inserted into the locking hole 13 disposed on the side surface of one end thick member 9a. The hook portions 11a, which are the tips of the hook bolts 11, are respectively hooked into the locking holes 13 provided on the side surfaces of the thick material 9b, and the threaded portions 12b, which are the rear ends of the hook bolts 12, are inserted into the guide holes 7.
, a threaded portion 11b which is the rear end of the hook bolt 11.
into the guide holes 6, and then tighten the hook bolts 1.
1 and 12 screw parts 11b and 12b respectively with nuts 1
4 to be concluded. Each end piece 9a, 9b
The other side is fastened in the same way and held in tension with each other on both sides.

Therefore, the end pieces 9a and the end pieces 9b are
Since they intersect at an accurate 90 degree angle and the tightening is strong, no looseness will occur at the fastened portion of the end pieces 9a and 9b, and the collapse of the end pieces and the column formwork will not occur. becomes.

Further, as shown in FIG. 3, the locking holes 13 according to the present embodiment include four locking holes on each side, and are hooked into any of the locking holes 13 in the hook portions 11a and 12a of the hook bolts 11 and 12. This is what makes it possible. Therefore, the hook portion 11 of the hook bolt
By hooking a, 12a into any one of the locking holes 13, tightening can be performed appropriately according to the thickness of the column to be formed, in other words, the size of the column formwork.

Furthermore, two guide holes 6 and 7 are provided in each guide surface 8a and 8b, and the end material 9
The structure is such that the column formwork can be tightened whether either a or 9b is up or down.

Furthermore, the device according to this embodiment is made of aluminum alloy and is much lighter in weight than iron. Therefore, it becomes possible to easily orthogonally intersect the end pieces, and the workability becomes very efficient.

[Effect of idea]

The present invention has the following effects.

It becomes possible to accurately and easily orthogonally intersect two end pieces. Therefore, the work of assembling the end pieces is significantly improved, and fine adjustment during positioning is no longer necessary.

Since the end piece is held in contact with the guide surface of the guide, it is prevented from shifting or rattling, and is held in a stable state.

Since the end piece is in contact with the support plate, displacement of the end piece in the vertical direction is prevented.

If the end pieces are made of aluminum, they are much lighter in weight than those made of iron, so the work of assembling the end pieces becomes extremely efficient.

Since the column formwork is tightened by tightening the threaded portion of the hook bolt and the nut, the tightening is strong and the generation of play in the fastened portion is prevented.

By strengthening the tightening of the fastening portion, it can sufficiently withstand vibrations that occur during concrete pouring, and the vibrations will not cause collapse of the end pieces and the column formwork.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a column formwork tightening device according to the present invention and its usage state, Fig. 2 is an enlarged perspective view of the column formwork tightening device, and Fig. 3 is a column formwork tightening device. FIG. 3 is an exploded perspective view of the attachment device. 1, 2... Guide piece, 3... Guide, 4, 5...
...Support plate, 6, 7...Guide hole, 8a, 8b...
Guide surface, 9a, 9b, 9c, 9d... end thick material,
11, 12... Hook bolt, 11a, 12a...
...Hook part, 11b, 12b...Screw part, 13...
... Locking hole, 14 ... Nut, 20 ... Column formwork, 2
1... Guide member.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a thick timber, a guide member, and a hook bolt, the guide member includes a guide in which the ends of two guide pieces are orthogonally joined together, and upper and lower ends of each guide piece. It consists of a horizontal support plate connected to the guide hole, and a guide hole provided in each guide piece, and the two end pieces inserted along the guide surface of each guide piece are orthogonally crossed, and the tip of the hook bolt inserted through the guide hole. Hook the hook into the locking hole in the end piece,
A tightening device for column formwork, characterized in that the other side of the hook bolt is fastened to each guide piece with a nut. (2) The tightening device for column formwork as set forth in claim 1 of the utility model registration claim, wherein one or more locking holes are provided on the side surface of the end piece. (3) Each guide surface has two guide holes along the vertical direction.
Scope of Claims for Utility Model Registration
Column formwork tightening device as described in Section 1. (4) A tightening device for column formwork made of aluminum alloy as set forth in claim 1 of the utility model registration claim. (5) The beam consists of a hollow rectangular beam,
Utility model registration claim 1, in which reinforcing ribs are provided in the beam along the longitudinal direction
Column formwork tightening device as described in Section 1.