JPH0541721U - Outer frame removal device for concrete formwork - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The entire slide can be made compact while leaving the advantage of a system in which a slide base is provided under the formwork and the outer frame moves in the contact / separation direction. (EN) Provided is a concrete frame outer frame attaching / detaching device in which the outer frame is not easily damaged. [Structure] A base 2, an inner frame 3 fixed on the base 2,
Similarly, in a concrete formwork having an outer frame 4 composed of a pair of split molds 5 placed on the base 2 so as to be movable back and forth around the inner frame 3, the lower part of each split mold 5 is rearwardly engaged. Child 6
On the other hand, the rotary shaft 9 having the engaging body 11 to which the engaging element 6 fits when the split mold 5 retracts is pivotally supported on the base 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete formwork, and more particularly to a device for attaching and detaching the outer formwork thereof.

[0002]

[Prior art and problems]

 For concrete product formwork such as manholes, sewage basins, and rainwater stubs, the outer frame is conventionally set by clamping with clamps and bolts, and when demolding, the fastening means is released and the outer frame is demolded by hand or by a crane. However, when the mold is removed from the outer frame, it is often hit or knocked down, which often deforms the shape and reduces the precision of the form. For this reason, there is a device in which a slide base is installed under the form frame and the outer frame moves in the separating and contacting direction on this slide base.However, the outer frame is kept until there is room to remove the product from the inner frame. Since the slide table needs to be moved, the slide table has a considerable length, and the slide table has a drawback that the formwork becomes large.

[0003]

[Means for solving problems]

 In view of the above points, the present invention intends to provide an outer frame attaching / detaching device for a concrete formwork, which can keep the advantages of the slide system and make the whole compact, and the outer frame is less likely to be damaged. Is composed of a base, an inner frame fixed on the base, and a pair of split molds mounted on the base so as to be movable back and forth around the inner frame. In a concrete formwork having an outer frame, an engaging member is provided on the lower rear side of each split mold, while an engaging portion to which the engaging member fits when the split mold retreats is rotatably supported on a base. It is characterized by being installed in the.

The present invention will be described in more detail. The present invention includes a base, an inner frame fixed on the base, and a mountable on the base movably back and forth around the inner frame. The present invention relates to a concrete formwork having an outer frame composed of a pair of split molds, and concrete products manufactured by the formwork associated with this port include manholes, sewage basins, rainwater basins, etc., cylindrical shapes, square tubular shapes, etc. It is mainly applied to concrete products that penetrate the front and back. The base is formed by fixing the inner frame at the center of the base, and the lower edge of the base is horizontally extended to form a bottom plate. Around it, a half-shell split outer frame is positioned so that it can move back and forth on the base. The split mold usually has a symmetrical pair shape, but it may be asymmetrical, or a semicircular split mold depending on the product. In addition, the split molds are in contact with each other to form a space between the inner mold and the inner frame, into which a fresh concrete is inserted. Bolts and clamps are used to tighten the split mold.

An engaging member is provided on the lower side of the rear side of the split mold, and when the tightening of the split mold is released and retracts, the rotating shaft provided with the engaging portion that engages the engaging member is provided on the base. It is supported. The engaging element and the engaging portion are in a male-female relationship, and as long as they can be engaged with each other, it is not limited which one is male and female. A handle may be attached and lowered to retract the split mold.

[0006]

[Action]

 Since the present invention is configured as described above, the split dies of the outer frame are brought into contact with each other around the inner frame, and the split dies are tightened with a clamp or the like. Then, ready-mixed concrete is poured between the outer and inner frames to solidify. When the solidification is completed, unclamp the split dies and place each split die in the opposite direction along the base with hands such as a handle.

An engaging element is formed on the lower rear side of the split mold, and when the split mold is retracted, this engaging element engages with an engaging body erected on a rotary shaft rotatably attached to the base, When it retracts to a certain distance, it is completely engaged, and further retracting is impossible, and the rotating shaft rotates to escape this, and the split mold is supported by the engaging body and moves upward in a fan-shaped manner around the rotating shaft. Lift up. As a result, the split mold is separated from the solidified concrete product, leaving room for demolding work from the inner frame. In this way, the concrete product is lifted up by a sandwiching machine, removed from the inner frame, and transported to a desired place.

[0008]

【Example】

 1 is a concrete formwork for manhole, 2 is a base, 3 is an inner frame fixed to the center of the base 2, and 4 is a pair of split molds 5. It is an outer frame. The outer frame 4 is mounted on the base 2 so as to be able to move forward and backward around the inner frame 3 with a predetermined gap. 3a is a bottom plate continuous with the lower edge of the inner frame 3. The split mold 5 has a semicircular cross section and is clamped to each other by a clamp (not shown) when they are in contact with each other. Reference numeral 6 denotes a triangular plate-shaped engaging element horizontally attached to the lower rear side of the split mold 5. A rotary shaft 9 rotatably supported by a bearing plate 8 is attached to the rear side surface 7 of the one-way base 2, and an opening for receiving the rotary shaft 9 when the engaging element 6 is horizontally retracted. The engaging body 11 having is provided upright. Reference numeral 12 is a handle for retracting the split mold 5, and 13 is a support member for the engaging element 6.

[0009]

【effect】

 As described above, according to the present invention, while the engaging piece is provided on the lower rear side of each split die, the rotating shaft provided with the engaging part to which the engagement piece is fitted when the split die retracts is used as the base. Since it is axially supported, if the split mold of the outer frame is retracted on the base, it will always engage with the engaging part, and if this is retracted further, this engaging part will rotate with the rotating shaft. The split mold is also supported by the engaging body, and at the same time, the split mold is rotated about the rotation axis to be released from the mold. Therefore, since the split mold rotates to widen the space between the split frame and the inner frame, there is room for work, and the concrete product inside can be demolded in that state, so there is no need to lengthen the base, and a work place is also possible. It can be made as small as possible and the formwork body is extremely compact. In addition, the split mold of the outer frame does not come off from the main body even when it is retracted, and its movement trajectory and maximum open / close position are also fixed, so routine work is possible and it contributes to stabilizing the quality of the product. You can Further, since the split mold rotates slightly horizontally and then rotates, when the product is circular, the inside of the tip of the split mold does not rub the surface of the concrete product and damage the finished surface.

[Brief description of drawings]

FIG. 1 is a front view showing a state where one split mold is rotated.

FIG. 2 is a front view when the outer frame is contacted.

[Figure 3] Partial slope view

FIG. 4 is a front view of a state in which the left and right split molds are retracted.

[Explanation of sign]

1-concrete for manhole, 2-base, 3-inner frame,
4-outer frame, 5-split type, 6-engager, 7-rear side surface, 8-bearing plate, 9-rotating shaft, 10-opening, 11-engaging body, 12
− Handle

Claims (2)

[Scope of utility model registration request] 1. A base and an inner frame fixed on the base,
Similarly, in a concrete formwork having an outer frame composed of a pair of split molds mounted on the base so as to be movable back and forth around the inner frame, an engaging member is provided projecting below the rear side of each split mold. On the other hand, when the split mold retreats,
An outer frame attaching / detaching device for concrete formwork characterized by being erected on a rotary shaft pivotally supported on a base. 2. The outer frame attaching / detaching device for a concrete formwork according to claim 1, wherein the split mold has a semicircular shape.