JPS6256105A - Formwork for molding cylindrical concrete product - 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 frame mold for molding cylindrical concrete products that is assembled and separated each time when molding cylindrical concrete products such as manholes and buried pipes. It is something.

[Prior art] Conventionally, a cylindrical concrete product forming frame is used to form a cylindrical concrete product such as a manhole by pouring fresh concrete between a cylindrical outer frame and a cylindrical inner frame that are arranged concentrically. Generally, the mold is made by dividing each of the cylindrical outer frame body and the cylindrical inner frame body into two or three pieces, and at the time of molding, the divided fragments are assembled to form a cylindrical frame body, and the cylindrical outer frame body and the cylindrical inner frame body are When releasing the concrete product from the mold, the assembled frame is divided to facilitate removal of the cylindrical concrete product from the molding frame.

However, as a practical matter, when removing a cylindrical concrete product from a molding frame, the cylindrical Funkrete product is in close contact with the molding frame, so the frame pieces that make up the frame are difficult to separate from the cylindrical concrete product. Because this frame piece must be removed for the number of divided pieces, it takes considerable effort and time to remove the cylindrical concrete product from the molding frame. The drawback was that it significantly reduced the efficiency of concrete product molding.

[Problems to be Solved by the Invention] An object of the present invention is to particularly facilitate the assembly and separation of a plurality of divided cylindrical inner frames as well as the removal of a cylindrical concrete product from a molding frame.

Means for Solving Problem E] The present invention provides a method for forming a cylindrical concrete product by pouring fresh concrete between a cylindrical outer frame and a cylindrical inner frame that are arranged concentrically. The frame body is divided into a C-shaped inner frame body and an arc-shaped inner frame body that can be elastically deformed inwardly, and between the front & IC-shaped inner frame body and the arc-shaped inner frame body,
Assembling and separating the cylindrical inner frame by reciprocating the arc-shaped inner frame on the center line of the arc, and in which the C-shaped inner frame is elastically deformed inward in the separated state.
A frame mold for forming a cylindrical concrete product is equipped with a separating device.

[Function] In the frame mold for forming a cylindrical concrete product configured as described above, when the arc-shaped inner frame is assembled to the C-shaped inner frame against its elastic force, the C-shaped inner frame A cylindrical inner frame is formed between the inner frame and the arcuate inner frame in an elastically deformed state.

By using a link type assembly/separation device that uses a trouble mechanism to move the arc-shaped inner frame when forming the cylindrical inner frame, the arc-shaped inner frame can be formed while elastically deforming the C-shaped inner frame. This makes it easy to assemble the cylindrical inner frame.

Fresh concrete is injected between the cylindrical inner frame and the cylindrical outer frame assembled in the cylindrical outer frame in this way, and after a certain period of time a cylindrical concrete product is formed. However, in this molded state, the cylindrical concrete product is in close contact with the frame, and in this case, for example, it is difficult to remove the cylindrical inner frame from the cylindrical concrete product. By using the link type assembly/separation device, the arc-shaped inner frame can be easily removed from the C-shaped inner frame, and since the C-shaped inner frame is elastically deformed in this removed state, the arc-shaped inner frame can be easily removed from the C-shaped inner frame. At the same time as the inner frame is separated, the C-shaped inner frame is released from close contact with the cylindrical concrete product, making it extremely easy to separate the cylindrical inner frame when taking out the cylindrical concrete product.

[Embodiment] Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

On the base frame 1, there are left and right cylindrical outer frames 2A, 2B in the form of a frame for forming a cylindrical concrete product W.
Each guide block 3 is movably attached to the guide bar 4 on the base frame 1 in a state where it is divided into two parts, and the guide blocks 3 are reciprocated in opposite directions on the base frame 1 to be assembled and separated into a cylindrical outer frame body 2. In the assembled state, they are positioned at the center of the base frame 1 and locked together by a clamp mechanism 7 consisting of a hook 5 and a lever handle 6 attached to the left and right cylindrical outer frames 2A, 2Bm.

At the center position on the base frame 1, concentrically with the assembled cylindrical outer frame 2, a cylindrical inner frame 8 in the form of a cylindrical concrete molding frame is connected to an arcuate inner frame 8A and a C-shaped inner frame 8A. Frame body 8
B. In this case, the C-shaped inner frame 8B, which can be elastically deformed at both ends inward, is installed in a divided state, and the arc-shaped inner frame 8A connects the guide block 9 to the base frame 1.
It is attached to the upper guide bar 10 so as to be movable, and attached to the C-shaped inner frame body 8B fixed on the base frame 1, and detachably attached to the inner side, and in the assembled state, it is an arc-shaped inner frame. The body 8A is assembled to the C-shaped inner frame 8B against its elastic force to form the cylindrical inner frame 8, and in the separated state, the C-shaped inner frame 8B has both ends elastically inward. Transform.

In this case, the arc-shaped inner frame 8A and the C-shaped inner frame 8
An assembly/separation device 11 for assembling the arc-shaped inner frame 8A into the C-shaped inner frame 8B and separating it inwardly,
That is, the upper and lower brackets 12A, 12 of the C-shaped inner frame 8B
The fixed side upper and lower links 14A and 14B are rotatably attached to B via the bin 13, and the movable side upper and lower links are rotatably attached to the upper and lower brackets 15A and 15B of the arcuate inner frame 8A via the bin 16. 17A and 17B in bin 1
8, fixed side upper and lower links 14A
, 14B and the movable upper and lower links 17A and 17B are connected via the synchronization link 19 at the upper and lower bin 18 positions, and the arc-shaped inner frame 8A is rotated by the handle 20 attached to the fixed upper link 14A. assembly/separation device 11 that reciprocates the C-shaped inner frame 8B against the elastic force of the C-shaped inner frame 8B.
is installed.

Next, the operation of this embodiment will be explained.

In the frame mold 21 for forming the cylindrical concrete product W configured as described above, when the handle 20 is operated to the solid line position shown in FIG. The cylindrical inner frame 8 is formed by assembling the cylindrical inner frame 8, and when fresh concrete is poured between the cylindrical inner frame 8 and the cylindrical outer frame 2 and time passes, the ready-mixed concrete hardens. A cylindrical concrete product W is molded, and when the cylindrical concrete product W is taken out from the frame 21, the cylindrical concrete product W is in close contact with the frame 21. When the inner frame 8A is operated from the solid line position to the two-dot chain line position shown in FIG. When the arc-shaped inner frame 8A is separated, both ends of the C-shaped inner frame 8B are elastically deformed inward due to the elastic force, so that the C-shaped inner frame 8B can also be easily removed from the cylindrical concrete product W. The cylindrical concrete product W can be easily taken out from the frame mold 21 in a state where the cylindrical outer frame body 2 is separated into left and right parts.

As the assembly/separation device W111, in addition to the link mechanism with the lever action of this embodiment, any boosting mechanism such as a cam, hydraulic pressure, pneumatic pressure, screw, etc. can be used.

[Effects of the Invention] The present invention provides a method for forming a cylindrical concrete product by pouring ready-mixed concrete between a cylindrical outer frame and a cylindrical inner frame that are arranged concentrically. It is divided into a C-shaped inner frame body and a circular arc-shaped inner frame body which can be elastically deformed, and the circular arc-shaped inner frame body is placed between the C-shaped inner frame body and the circular arc-shaped inner frame body. Molding of a cylindrical concrete product equipped with an assembly/separation device that allows the cylindrical inner frame to be assembled and separated by reciprocating on the center line of a circular arc, and elastically deforms the C-shaped inner frame inward in the separated state. It is in a frame type.

As a result, the present invention has the effect of particularly facilitating the assembly and separation of the divided cylindrical inner frame body and the removal of the cylindrical product from the molding frame.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a detailed view of an assembly/separation device 111 thereof. DESCRIPTION OF SYMBOLS 1... Base frame 2... Cylindrical outer frame body, 8... Cylindrical inner frame body 11... Assembly/separation device 21... Frame type

Claims (1)

[Scope of Claims] 1. When molding a cylindrical concrete product by pouring ready-mixed concrete between a cylindrical outer frame and a cylindrical inner frame that are arranged concentrically, the cylindrical inner frame is placed inside. The arc-shaped inner frame is divided into an elastically deformable C-shaped inner frame and an arc-shaped inner frame, and the arc-shaped inner frame is inserted between the C-shaped inner frame and the arc-shaped inner frame. The cylindrical inner frame is reciprocally moved on the center line of the C-shaped inner frame to enable assembly and separation of the cylindrical inner frame, and is equipped with an assembly/separation device that elastically deforms the C-shaped inner frame inward in the separated state. Frame mold for forming concrete products. 2. A link type assembly with a lever action in which the assembly/separation device moves the arc-shaped inner frame onto its arc center line and locks it at the position where the cylindrical inner frame is formed between it and the C-shaped inner frame. - The frame mold for forming a cylindrical concrete product according to claim 1, which is a separating device.