JPH0422967Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a formwork device for a wave-dissipating foundation block, and more specifically, it relates to a formwork device for a wave-dissipating foundation block. The present invention relates to a core formwork device suitably used for such applications.

[Prior art and issues to be solved]

Generally, various types of wave-dissipating blocks made of concrete are installed in ports and rivers for wave-dissipating purposes, and these wave-dissipating blocks are equipped with a vertical hole near the center to reduce the uplift force caused by the fluid. It is also known that it is preferable to adopt a configuration that reduces the

However, when forming this type of vertical hole,
For example, if a split-structure formwork device is used, the cross-sectional area will be the size of a manhole, which may be impractical depending on the size of the block, and if a middle-tube type formwork device is used, the relationship with concrete adhesion may be affected. Not only does the cross-sectional area become smaller, but also harmful stress is generated during the extraction process, which can lead to damage around the vertical hole.On the other hand, using a mechanically constructed core frame device only increases costs in terms of construction and cost. Conventional vertical holes are not necessarily of the appropriate size or shape for hydraulic functions due to the high rate of damage to the equipment itself.Furthermore, the vertical holes themselves have been carefully selected due to the adhesion of concrete. There were various problems to be solved, such as having to create an unnecessary tapered shape with a slope.

[Means for solving problems]

Therefore, in this invention, a locking guide part for forming holes is provided protruding from the bottom frame member of the formwork device for pouring concrete, and a core frame member is attached to the mounting part provided on the outer periphery of this locking guide part. The frame members are alternately erected, a draft angle is provided at the joint of adjacent frame members, at least one pair of opposing frame members is held by a stopper member, and each frame member is removed from the concrete at the mounting portion. By providing a relief part when releasing the mold, the core formwork device is constructed so that desired holes suitable for hydraulic function can be easily formed.

In this case, the escape part is composed of a sloped part provided on the upper edge of the locking guide part and a chamfered plate placed on the bottom frame member, or a sloped part provided on the upper edge of the locking guide part and this sloped part. It is preferable that the recess is continuous with the bottom frame member and formed at a position below the face plate of the bottom frame member.

[Effect]

In this device, the core frame member and the cut-out frame member are installed upright on the mounting part provided on the outer periphery of the locking guide part, and the hole forming part is secured by clamping the width, and the width clamping is also secured after the concrete has hardened. The frame member is released, and the frame member is struck and tilted inward using the relief portion as a fulcrum, thereby releasing the mold and pulling it out to form a desired vertical hole.

〔Example〕

Next, preferred embodiments of the core formwork device according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, a core formwork device 10 according to the present invention is a bottom frame member 1 of a formwork device A configured to form a wave-dissipating root block of a predetermined shape.
2 is integrally provided with a locking guide portion 14 for forming a vertical hole. As is clear from FIG. 3, this guide part 14 is set to have a slightly smaller shape than the frame body in which the vertical hole B is to be formed, and is protruded from plate members arranged in a grid pattern to form the concrete. The structure is designed to prevent excess concrete from clogging during pouring.

A mounting part 16 is provided on the outer periphery of the guide part 14, and core frame members 18 and frame-cutting members 20 are alternately erected on this mounting part 16, and these core frame members 18 and frame-cutting members 20 are attached. A draft angle C (see FIG. 2) is formed in the joint flange so that the frame extraction member 20 can be pulled out toward the center of the vertical hole B.

In addition, a locking hole 22 is formed in the upper flanges of the opposing frame removal members 20a and 20b, and a locking member 22 is inserted into the locking hole 22 via a locking pin (not shown).
4, the upper positions of each frame member 18, 20 are held in a predetermined position.

On the other hand, a mounting portion 16 provided on the outer periphery of the guide portion 14
A relief portion 26 is formed in each of the frame members 18 and 20, which is used to release the erected frame members 18 and 20 from the cast concrete. The relief portion 26 is constituted by a centrally inclined portion 28 formed on the upper edge of each plate member constituting the guide portion 14 and a chamfered plate 30 disposed at a predetermined position on the bottom frame member 12.

In FIG. 1, reference numeral 32 is an upper chamfered plate disposed at a predetermined position on the upper outer side of each frame member 18, 20, and reference numeral 34 is an upper chamfered plate disposed at a predetermined position on the upper outer side of each frame member 18, 20. This is a bolt search hole used for.

Next, a procedure for forming the vertical holes B when molding a wave-absorbing foundation block using the core formwork device 10 according to the present invention constructed as described above will be explained.

That is, after assembling the formwork device A, the core members 18 are dropped into the mounting portion 16 provided on the outer periphery of the guide portion 14 of the bottom frame member 12.
The frame member 20 is inserted into the spaced apart part 8, and each frame member is tightened with a joining bolt inserted through the insertion hole 34. Next, both ends of the width stopper member 24 are fixed to the upper flanges of the opposing frame removal members 20a and 20b via stopper pins (not shown) to maintain the shape and position of the vertical hole B to be formed. In order to prevent each frame member from lifting up, this core formwork device 10 is
Concrete is poured between the and formwork device A.

Once the poured concrete has hardened,
First, remove the stopper member 24 from the frame extraction member 20,
When a blow is applied to the top of the frame removing member 20 in the direction of the arrow (FIGS. 2 and 4), the frame removing member 20 is moved toward the center of the vertical hole in the space of the inclined portion 28 that constitutes a part of the relief portion 26. The mold is easily released from the poured concrete (see the chain lines in Figures 2 and 4).

In this case, the lower end of the frame-cutting member 20 corresponds to the distance between the inclined part 28 toward the center formed on the upper edge of each plate member constituting the guide part 14 and the chamfered plate 30 disposed on the bottom frame member 12. Since it moves easily within the part and serves as a fulcrum during demolding, there is no need to create a draft angle in the vertical hole in consideration of concrete adhesion, etc., as in the past.

After the core frame member 18 is similarly struck and released from the mold, each of the frame members 18 and 20 is pulled up to obtain the desired vertical hole B.

Further, in FIGS. 5 and 6, the relief portion 26 is formed by a centrally inclined portion 28 formed on the upper edge of the guide portion 14 and a recessed portion 36 formed below the chamfered plate 30 of the bottom frame member 12. This is another embodiment of the core formwork device according to the present invention, in which each frame member 18, 20 is installed, released or pulled out along the slope of the slope portion 28 as shown by the dotted line. It will be done. Incidentally, in order to reduce the size of the entire formwork device 10, it is preferable to configure the relief portion 26 with the slope portion 28 and the chamfered plate 30 as in the above-described embodiment.

[Effect of idea]

As mentioned above, according to the core formwork device according to the present invention, since the core frame member and the punching member are held upright by the mounting portion and the width stopper member to secure the hole forming portion, there is no water leakage. It is possible to freely form vertical holes of any size and shape suitable for the physical function. In addition, demolding and extraction are easy, and the stress on the blocks can be reduced, making the casting cycle more efficient and reducing construction costs.Furthermore, the simple structure makes handling and construction extremely easy, making manufacturing easier. It has various advantages such as being able to reduce costs, and its practical effects are extremely large.

Although the preferred embodiment of the core formwork device according to the present invention has been described above, the present invention is not limited to this embodiment. It can be suitably used for forming the present invention, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional explanatory view showing the relationship between a preferred embodiment of the core formwork device according to the present invention and a concrete block to be formed, and Fig. 2 is a plan view of the core formwork device shown in Fig. 1. Fig. 3 is an explanatory cross-sectional view taken along the line - in Fig. 1, Fig. 4 is an explanatory cross-sectional view when the punching member is released from the mold in the core form machine shown in Fig. 1, and Fig. 5 is an explanatory view of the present invention. FIG. 6 is a cross-sectional explanatory view showing another embodiment of the core formwork device according to the present invention, and FIG. 10... Core formwork device, 12... Bottom frame member, 1
4... Guide part, 16... Mounting part, 18... Core frame member, 20... Frame extraction member, 22... Locking hole, 2
4... Width stop member, 26... Relief portion, 28... Inclined portion, 30... Chamfered plate, 32... Upper chamfered plate, 34
...Joining bolt insertion hole, 36...Drilling recess.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A locking guide portion for forming holes is provided protrudingly from the bottom frame member of a formwork device for pouring concrete, and a mounting portion provided on the outer periphery of this locking guide portion is provided. The core frame members and the punched frame members are alternately erected, and a draft angle is provided at the joint of the adjacent frame members, and at least one pair of facing punched frame members is held by a stopper member, and each A core formwork device characterized by providing a relief part when releasing a frame member from concrete. (2) The core formwork device according to claim 1, wherein the relief portion is constituted by an inclined portion provided on the upper edge of the locking guide portion and a chamfered plate placed on the bottom frame member. (3) The escape part is constituted by an inclined part provided on the upper edge of the locking guide part and a recessed part continuous with the inclined part and formed at a position below the face plate of the bottom frame member. Core formwork equipment as described.