JPH0342202Y2 - - 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 hole for driving a wedge at the other end were sequentially arranged along the outer periphery of the formwork, and at this time, the hole for driving the wedge was formed. The leading end of one of the end pieces 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 above-mentioned column formwork tightening device, 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 play, and there are cases where it is not possible to maintain the right angle between two adjacent thick pieces. Therefore, in this state, the column formwork is deformed, and the column to be molded 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 framework will collapse.

Therefore, in view of the above-mentioned circumstances, the present invention makes it possible to easily orthogonally intersect two end pieces, streamline the tightening work of column formwork, and furthermore, 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 present invention is to create a column formwork in which four end pieces are arranged around a column form, and the ends of two adjacent end pieces are tightened orthogonally. The tightening device has a first tightening member consisting of a guide member and a hook bolt, a second tightening member consisting of a guide member and a bolt, and the first and second tightening members. are tightened at the orthogonal parts of diagonally opposing end pieces, and the guide member includes a guide in which the ends of two guide pieces are orthogonally connected, and a horizontal support plate connected to the upper and lower ends of each guide piece. and a guide hole provided in each guide piece. Hook the end hook into the locking hole provided in the thick material, fasten the other side of the hook bolt to each guide piece with a nut, and then
The tightening member is characterized in that two end pieces inserted along the guide surface of each guide piece are orthogonally crossed, and the guide member and the two end pieces are connected with bolts inserted vertically from the support plate. This is what we assumed.

[Effect]

Since the two end pieces inserted along the guide surface of each guide piece are perpendicular to each other in advance, the right angle can be automatically established. 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 tightening at the fastening part. By doing so, the occurrence of backlash in the fastening portion can be prevented.

In addition, 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. Four end pieces 9a, 9 are placed around the outer periphery of the column formwork 20.
b, 9c, and 9d are arranged, and the corners of the two adjacent end pieces 9a, 9b and the corners of the end pieces 9c, 9d are perpendicular to each other and tightened by the first tightening members A, A, and similarly, The corners of the two end pieces 9a, 9d and the corners of the end pieces 9b, 9c are perpendicular to each other and are tightened by second tightening members B, B. That is, the end pieces 9a, 9b, 9c, 9d arranged around the outer periphery of the column form 20
By firmly tightening the perpendicular portions of the column through the first tightening member A consisting of the guide member 21 and the hook bolt 11 and the second tightening member B consisting of the guide member 21 and the bolt 23, 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 the fastening portion for fastening the column form 20 using the first fastening member A.

The guide member 21 includes first and second tightening members A,
Horizontal support plates 4 and 5 are common members in B, and are connected to the upper and lower ends of two guide pieces 1 and 2 provided with guide surfaces 8a and 8b, respectively, as shown in FIG.
It is formed of two upper and lower guide holes 6 provided in one guide piece 1, two upper and lower guide holes 7 provided in the other guide piece 2, and bolt holes 24 bored in the support plates 4 and 5. ing.

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, respectively, and the thick pieces 9a are moved along the upper part of the guide surface 8a.
One side of the end piece 9b is placed along the lower part of the guide surface 8b, and the bottom surface of the end piece 9a is in contact with the upper surface of the end piece 9b. 9a and 9b are the guide members 21, respectively.
is inserted inside. Thick timbers 9a, 9b, 9
A hole 22 for inserting a bolt is provided near the end portions c and 9d.

The thick end material 9a is connected to the guide surface 8a.
In this case, the 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 end member 9a and the end member 9b are orthogonal 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 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.

Similarly, the corners of the diagonally opposed end pieces 9c and 9d are also fastened in the same manner as described above.

Furthermore, as shown in FIG. 3, the locking holes 13 according to this embodiment are made up of four holes on each side, and can be hooked into any of the locking holes 13 in the hook portions 11a and 12a of the hook bolts 11 and 12. This makes it possible to Therefore, the hook portion 11 of the hook bolt
By hooking a and 12a into any of the locking holes 13, it becomes possible to tighten the column appropriately according to the thickness of the column to be molded, in other words, the size of the column form.

Further, two guide holes 6 and 7 are provided in each guide surface 8a and 8b, respectively, and the end material 9
The structure is such that the column formwork can be tightened no matter which one of a and 9b is up or down.

On the other hand, as shown in FIG.
or the corners of the thick timbers 9b and 9c are the second
It is fastened with a fastening member B. In this case, each end piece is supported at right angles by the guide member 21, and then a bolt 23 is inserted vertically through the hole 24 to connect the end piece and the guide member 21.

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]

According to the present invention, there are 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 occurrence of play in the tightened 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.

The second tightening member can be used for temporary tightening, and the first tightening member can be used for final tightening, improving work performance.

If you connect the end piece and the guide member with the second tightening member, you can carry them while they are connected.
Can be stored.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a column formwork tightening device using a first tightening member 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. 4 is an exploded perspective view of the frame tightening device, FIG. 4 is a perspective view of the second tightening member in use, and FIG. 5 is a reduced schematic plan view of FIG. 1. 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, 22, 24...Bolt hole, 23...Bolt, A...First tightening member, B
...Second tightening member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A tightening device for column formwork in which four end pieces are arranged around the column formwork and the ends of two adjacent end pieces are tightened orthogonally. It has a first tightening member consisting of a guide member and a hook bolt, and a second tightening member consisting of a guide member and a bolt, and the first and second tightening members are diagonally opposed to each other. The guide member includes a guide in which the ends of two guide pieces are orthogonally connected, a horizontal support plate connected to the upper and lower ends of each guide piece, and each guide piece. The first tightening member consists of a guide hole provided in the guide hole, and the first tightening member is made by orthogonally crossing two end pieces inserted along the guide surface of each guide piece, and attaching the end hook of the hook bolt inserted through the guide hole to the end piece. The other side of the hook bolt is fastened to each guide piece with a nut, and the second tightening member is used to attach two thick pieces inserted along the guide surface of each guide piece. A tightening device for column formwork, characterized in that a guide member and two end members are connected to each other by bolts that are orthogonal to each other and inserted vertically from a support plate. (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. (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. (6) The tightening device for column formwork as set forth in claim 1 of the utility model registration claim, wherein holes for bolt insertion are formed in the support plate and the thick end material.