KR102599396B1 - Automatic release device for lifting gangform safely and gangform system having the same - Google Patents

Abstract

An automatic disassembly device for safe lifting of a gangform related to the present invention includes a lifting ring formed to be attached to the gangform main body; a lifting member that is installed to be able to be raised and lowered on the lifting ring and is formed to be raised first according to the lifting of the hook of the crane hooked on the lifting ring; A wire at one end connected to the lifting member; a moving member connected to the other end of the wire and configured to be drawn horizontally as the wire is pulled; An operating protrusion coupled to the moving member; And its rear end is formed to be restrained by the operating protrusion, and its front end engages with the end of the anchor rod embedded in concrete on the inside of the gang form body to maintain the fastened state or to move the moving member and the operating projection. Accordingly, it may include at least one pair of grippers formed to release the fastened state by mutually moving in a direction perpendicular to the moving direction of the moving member.

Description

Automatic disassembly device for safe lifting of gangform and gangform system having same {AUTOMATIC RELEASE DEVICE FOR LIFTING GANGFORM SAFELY AND GANGFORM SYSTEM HAVING THE SAME}

The present invention relates to an automatic disassembly device for safe lifting of gangform and a gangform system having the same.

In building construction, formworks are temporary structures that are used to pour unhardened concrete to build a concrete structure, and to cure and support it until it reaches the desired strength. It is also called a formwork.

In general, the form is made up of a block panel that contacts the unhardened concrete, and braces, strips, and long joints that support it. Steel wires, bolts, and tie members that penetrate concrete are also used. A release agent is applied to the blocking panel in advance so that it can be easily removed after it hardens. In order to support the load of concrete, formwork needs to be designed and constructed to have sufficient strength, and for this purpose, various formwork materials are used.

Formwork varies depending on the main material, the use or purpose for which it is constructed, or the characteristics with which it is handled. Among them, gang form refers to a systemized form that simplifies and enlarges the form to eliminate the need for assembly and disassembly. It is mainly used to build tall apartments or buildings. These gangforms are generally large in size and heavy in weight, so they are lifted by cranes. The main work element before lifting the gangform by a crane is to secure safety by hanging the lifting hook of the gangform on the crane before completely separating the gangform. If the anchor bolt is dismantled without the lifting ring being hung on the crane, the formwork may fall the moment it is separated from the concrete, resulting in an accident. To this end, in order to prevent arbitrary dismantling of the hardened concrete of the final anchor bolt supporting the form, a device designed to enable tool access to the final anchor bolt after preparation for lifting by a crane is completed was also developed.

When gangform is used to build a high-rise building, such as a building or apartment, it involves dismantling the gangform used on the previous floor and moving it to the upper floor. In this process, workers must loosen several bolts that secure the form, which takes up a lot of time. In particular, in the case of gang forms used in buildings with high floor heights, the difficulty of loosening bolts located on the high side increases and the risk of safety accidents increases.

* Related prior literature

Republic of Korea Patent No. 10-2199396 (registered on December 30, 2020)

Republic of Korea Patent No. 10-0892615 (registered on April 2, 2009)

Republic of Korea Patent Publication No. 10-2017-0096618 (published on August 24, 2017)

The object of the present invention is to provide an automatic disassembly device for safe lifting of a gang form that can fundamentally eliminate separate work for dismantling by automatically separating the lifting device from the anchor rod during the process of lifting the gang form by a crane, and having the same. The goal is to present a gangform system.

An automatic disassembly device for safe lifting of a gangform related to the present invention includes a lifting ring formed to be attached to the gangform main body; a lifting member that is installed to be able to be raised and lowered on the lifting ring and is formed to be raised first according to the lifting of the hook of the crane hooked on the lifting ring; A wire at one end connected to the lifting member; a moving member connected to the other end of the wire and configured to be drawn horizontally as the wire is pulled; An operating protrusion coupled to the moving member; And its rear end is formed to be restrained by the operating protrusion, and its front end engages with the end of the anchor rod embedded in concrete on the inside of the gang form body to maintain the fastened state or to move the moving member and the operating projection. Accordingly, it may include at least one pair of grippers formed to release the fastened state by mutually moving in a direction perpendicular to the moving direction of the moving member.

As an example related to the present invention, the automatic disassembly device for safe lifting of the gang form may further include a first housing in which the at least one pair of grippers are accommodated.

As an example related to the present invention, the moving member includes: a base plate; and a support plate coupled to the base plate, and the operating protrusion may be formed on the support plate.

As an example related to the present invention, the automatic disassembly device for safe lifting of the gangform may further include a second housing that is formed to accommodate the first housing, and in which the first housing slides. there is.

As an example related to the present invention, the operating protrusion may have an inclination angle such that it spreads toward the tip.

As an example related to the present invention, the operating protrusion may be accommodated in each gripper constituting the at least one pair of grippers, and a guide hole may be formed in the extension direction of each of the accommodated operating projections.

As an example related to the present invention, the automatic disassembly device for safely lifting the gangform may further include at least one pulley configured to change the direction of the wire.

As an example related to the present invention, an automatic disassembly device for safe lifting of the gangform includes a guide rod configured to restrain the at least one pair of grippers and guide them to move in a direction perpendicular to the moving direction of the moving member. It may further include.

As an example related to the present invention, a slide hole for guiding the guide rod may be formed in each gripper constituting the at least one pair of grippers.

As an example related to the present invention, threads may be formed on the inner peripheral surface of the tip of each gripper constituting the at least one pair of grippers.

Additionally, the present disclosure includes a gangform system including an automatic disassembly device for safe lifting of the gangform as described above.

According to the automatic disassembly device for safe lifting of the gang form related to the present invention and the gang form system having the same, when the lifting member rises, the wire is pulled, and the moving member coupled with the operating protrusion moves to move the grippers in the moving direction of the moving member. By moving it in a perpendicular direction, the state in which it is engaged with the end of the anchor rod is released. Fastening and releasing of the anchor rod is accurate, and the mechanism can be constructed simply and compactly while reducing the number of parts for operation. There is an advantage.

With this automatic disassembly device, the lifting device can be automatically separated from the anchor rod just through the process of lifting with a crane, and separate work for dismantling the form becomes unnecessary, dramatically reducing work time and work-related costs. You can.

Figure 1 is a cross-sectional view schematically showing a gangform system installed with an automatic disassembly device 100 for safe lifting related to the present invention.
FIG. 2 is a cross-sectional view schematically showing the automatic disassembly device 100 in FIG. 1 in operation.
Figure 3 is a cross-sectional view showing the separation unit 140, which constitutes an automatic disassembly device for safe lifting of the gang form related to the present invention, separated.
FIG. 4 is a cross-sectional view showing the operating state of the separation unit 140 of FIG. 3.
Figure 5 is a cross-sectional view showing grippers 171 and 172 according to an example related to the present invention.
Figure 6 is a cross-sectional view taken along line AA of Figure 5.

Hereinafter, an automatic disassembly device for safe lifting of a gangform related to the present invention and a gangform system having the same will be described in detail with reference to the attached drawings.

The lifting safety device related to the present invention can be applied to various formwork systems, including gang form. In the case of gang form, by enlarging and simplifying it, construction of the next floor is facilitated by lifting it without the need for assembly and disassembly.

Figure 1 schematically shows a gangform 10 on which an automatic disassembly device 100 for safe lifting related to the present invention is installed, and Figure 2 schematically shows the automatic disassembly device 100 in operation in Figure 1. . According to these drawings, the gangform 10 is provided with a gangform main body 11 and an automatic disassembly device 100 attached to the gangform main body 11. The gangform body 11 may include a panel in contact with concrete, and horizontal and vertical reinforcing members to provide panel assembly and rigidity.

When the installation of the gang form (10) is completed, concrete is put into the inside of the gang form main body (11), and after a specified curing time, the gang form (10) is separated from the hardened concrete. When installing the gang form 10 in concrete, the anchor rod 30 is installed in advance so that the anchor rod 30 is embedded in the concrete. A threaded portion 31 is formed at the end of the anchor rod 30 so that it can be fastened from the outside of the gang form 10 by a fastener containing a nut or screw.

The automatic disassembly device for lifting (100) includes a lifting hook (110) that is hung by a hook or sling of a lifting device such as a crane. The lifting ring 110 may be coupled to the reinforcing member of the gangform main body 11.

The lifting ring 110 is a lifting member 120 that prevents the nut or fastening device for the anchor rod 30 from arbitrarily loosening to prevent the gangform 10 from falling from the concrete before being hung by the crane when the gangform 10 is dismantled. is provided. The existing lifting member 120 prevents tools for loosening the nut or fastening device from entering when it is in a lowered state, and allows the nut or fastening device to be loosened using a tool only after the lifting member 120 is raised. There was a case, but in the present invention, the fastening state to the anchor rod 30 is maintained before the lifting member 120 rises, but when the lifting member 120 rises, the fastening state to the anchor rod 30 is automatically released, so naturally. It is configured to enable lifting of the gang form (10). In other words, it is naturally dismantled during the lifting process without the worker having to move or go to the location where the anchor rod 30 is located. For this purpose, a wire 130 is connected to the lower part of the lifting member 120, and the opposite end of the wire 130 is connected to the separation unit 140. The upper part of the lifting member 120 has a round shape similar to the lifting ring 110, and can be installed to be restored to its position by a separate spring (not shown).

The wire 130 is formed so that it can be pulled together when the lifting member 120 is raised upward. The wire 130 may be made of a material (e.g., iron core, fiber core, etc.) that can cope with the load required to move the moving member 150, which will be described later, and a chain may be used. Pulleys 131 and 132 may be installed to guide the wire 130 while changing its direction.

A separation unit 140 operated by a wire 130 is installed at the lower part of the lifting ring 110. The separation unit 140 is configured to be fixed by being coupled to the end of the anchor rod 30 embedded in concrete on the inside of the gangform body 11, or to be released from the fixed state and separated from the end of the anchor rod 30.

Figure 3 is a cross-sectional view showing the separation unit 140 forming an automatic disassembly device for safe lifting of the gang form related to the present invention, and is a cross-sectional view showing the operating state of the separation unit 140 of Figure 3 in Figure 4. 5 is a cross-sectional view showing the grippers 171 and 172 according to an example related to the present invention, and FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5.

The separation unit 140 includes a first housing 143, a second housing 146, a moving member 150, a draw-out rod 155, a spring 157, an operating protrusion (161, 162), and a gripper (171, 172). ), guide rod 180, etc. may be provided.

The first housing 143 may be formed in a cylindrical or rectangular shape capable of accommodating the moving member 150 and the grippers 171 and 172, and can be slidably moved within the second housing 146. It can be. The second housing 146 is fixed to the frame of the lifting hook 110, and as the wire 130 is pulled, the first housing 143 moves within the second housing 146 as a whole by the pulled distance. A through hole 145 is formed at the tip of the first housing 143 so that the threaded portion 31 of the anchor rod 30 can be inserted.

The moving member 150 is formed to be movable in the horizontal direction within the first housing 143. The rear end of the moving member 150 is coupled to the draw-out rod 155 so that the moving member 150 can be connected to the wire 130. The moving member 150 is elastically moved by the spring 157, and even if it is pulled and retracted by the lifting member 120 and the wire 130, when the lifting member 120 is lowered, the moving member 150 returns to its original state. It is elastically restored to its position.

The moving member 150 may include a base plate 151 and a support plate 152. The support plate 152 is an element in which at least one pair of operating protrusions (161, 162) are fixed and supported, which are arranged to have an inclination angle in a way that spreads and extends toward the tip. First, the operating protrusions (161, 162) are connected to the support plate ( It can be assembled by fixing it to 152) and then joining the base plate 151.

The grippers 171 and 172 are restrained by the operating protrusions 161 and 162 inside the first housing 143. The gripper (171, 172) is engaged with the threaded portion (31) of the anchor rod (30) to maintain the fastened state or the moving direction of the moving member (150) according to the movement of the moving member (150) and the operating protrusions (161, 162). It is configured to release the fastened state by mutually moving in a direction perpendicular to . Like the operating protrusions 161 and 162, the grippers 171 and 172 may be composed of one pair or multiple pairs. The tip of the grippers 171 and 172 has a groove to accommodate the threaded portion 31 of the anchor rod 30, and a thread 175 through which the threaded portion 31 can be engaged is formed on the inner peripheral surface of the groove. .

The grippers 171 and 172 accommodate the operating protrusions 161 and 162, and guide holes 173 and 174 are formed to guide the operating protrusions 161 and 162 in their respective extension directions. Accordingly, the operating protrusions 161 and 162 can slide to some extent in the direction in which the guide holes 173 and 174 of the grippers 171 and 172 extend (longitudinal direction).

A guide rod 180 is installed in the first housing 143 to restrain the grippers 171 and 172 and guide them to move in a direction perpendicular to the moving direction of the moving member 150. Additionally, a slide hole 176 for guiding the guide rod 180 may be formed in the grippers 171 and 172. Accordingly, as shown in FIG. 4, when the wire 130 is pulled and the moving member 150 and the operating projections 161 and 162 move to the left, the operating projections 161 and 162 move to the left while the guide holes 173, It slides in the direction of extension of 174) and causes the grippers 171 and 172 restrained by the guide rod 180 to spread in the vertical direction. In this case, the grippers 171 and 172 are released from being engaged with the threaded portion 31 of the anchor rod 30. Thereafter, the continued movement of the wire 130 moves the entire second housing 146, which accommodates the grippers 171, 172 and the operating projections 161, 162, to the left, and as a result, the gangform body 11 is completely pressed against the concrete. Separation becomes possible.

The automatic disassembly device for safe lifting of the gangform described above and the gangform system having the same are not limited to the configuration and method of the described embodiments. The above embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

10: Gangform 11: Gangform body
30: Anchor rod 31: Threaded portion
100: Automatic disassembly device 110: Lifting ring
120: Elevating member 130: Wire
131, 132: pulley 140: separation unit
143: first housing 146: second housing
150: moving member 151: base plate
152: support plate 155: withdrawal rod
157: spring 161, 162: operating protrusion
171, 172: Gripper 173, 174: Guide hole
175: thread 176: slide hole
180: Guide rod

Claims (11)

A lifting ring formed to be attached to the gangform body;
a lifting member that is installed to be able to be raised and lowered on the lifting ring and is formed to be raised first according to the lifting of the hook of the crane hooked on the lifting ring;
A wire at one end connected to the lifting member;
a moving member connected to the other end of the wire and configured to be drawn horizontally as the wire is pulled;
An operating protrusion coupled to the moving member; and
Its rear end is formed to be restrained by the operating protrusion, and its tip engages with the end of the anchor rod embedded in concrete on the inside of the gang form body to maintain the fastened state or according to the movement of the moving member and the operating projection. at least one pair of grippers formed to release the fastening state by moving with each other in a direction perpendicular to the moving direction of the moving member;
a first housing in which the at least one pair of grippers are accommodated; and
It is formed to accommodate the first housing, and includes a second housing in which the first housing slides,
The moving member is,
base plate; and
Includes a support plate coupled to the base plate,
An automatic disassembly device for safe lifting of a gangform, wherein the operating protrusion is formed on the support plate.
delete delete delete According to paragraph 1,
An automatic disassembly device for safe lifting of gangforms, wherein the operating protrusion has an inclination angle so that it can be expanded toward the tip.
According to clause 5,
The operating protrusion is accommodated in each gripper constituting the at least one pair of grippers, and a guide hole is formed in an extension direction of each of the accommodated operating projections. An automatic disassembly device for safe lifting of a gang form.
According to paragraph 1,
Automatic disassembly device for safe lifting of gangform, further comprising at least one pulley configured to change the direction of the wire.
According to paragraph 1,
Automatic disassembly device for safe lifting of a gangform, further comprising a guide rod configured to restrain the at least one pair of grippers and guide them to move in a direction perpendicular to the moving direction of the moving member.
According to clause 8,
An automatic disassembly device for safe lifting of a gangform, wherein each gripper constituting the at least one pair of grippers is formed with a slide hole for guiding the guide rod.
According to paragraph 1,
An automatic disassembly device for safe lifting of a gangform, wherein a screw thread is formed on the inner peripheral surface of the tip of each gripper constituting the at least one pair of grippers.
A gangform system including an automatic disassembly device for safe lifting of the gangform according to any one of claims 1, 5 to 10.