This application claims priority from Taiwanese Patent Application No. 110135146, filed on Sep. 22, 2021.
The disclosure relates to a building formwork apparatus having a locking member.
An existing building formwork apparatus, as disclosed in Taiwanese Patent No. 1716319, includes at least four formworks and at least one connecting hornbeam block. Each formwork has a mold surface at one side thereof, a mounting surface at the other side thereof, and two connecting posts disposed on upper and lower ends of the mounting surface. Each connecting post has a plurality of through holes. The connecting hornbeam block has a plurality of connecting holes.
After the formworks are brought to align with and abut against each other, the connecting hornbeam block is then disposed on the connecting posts of the formworks, after which a plurality of fasteners are extended through the through holes and the connecting holes to fix the formworks and the connecting hornbeam block, thereby cooperatively forming the existing building formwork apparatus. However, the positioning of the formworks relies only on the connecting hornbeam block, so that, after assembly, the mold surfaces of the formworks are prone to misalign and become uneven. There is still room for improvement of the existing building formwork apparatus.
Therefore, an object of the present disclosure is to provide a building formwork apparatus that can alleviate at least one of the drawbacks of the prior art.
Accordingly, a building formwork apparatus of this disclosure comprises a building formwork and a locking member. The building formwork includes a wall plate and a frame disposed on the wall plate. The wall plate has a mounting surface and a mold surface opposite to the mounting surface. The frame is disposed on the mounting surface, and has at least one positioning hole and at least one locking hole. The locking hole has an internally threaded section. The locking member extends along and is rotatable about an axis, and includes a driven portion, a shoulder formed on one end of the driven portion, a positioning portion, and a threaded portion. The positioning portion includes a first tapered section connected to the shoulder, and a second tapered section connected to the first tapered section at a side opposite to the shoulder. The positioning portion gradually tapers from the first to the second tapered section in a direction away from the shoulder. Each of the first and second tapered sections has a cross section smaller than that of the shoulder. The threaded portion is connected to the second tapered section at a side opposite to the first tapered section, and has an external thread corresponding to the internally threaded section.
The positioning hole is configured to receive insertion of the locking member therethrough such that the first tapered section of the locking member is retained in the positioning hole to restrict the locking member to rotate about the axis and such that the second tapered section of the locking member is exposed from the positioning hole for connection with another building formwork apparatus. The locking hole is adjacent to the positioning hole and is configured to receive a threaded portion and a second tapered section of a locking member of the another building formwork apparatus. The internally threaded section of the locking hole is configured to engage with the threaded portion of the another building formwork apparatus.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings, in which:
Referring to
Referring to
2, the locking member 1 extends along and is rotatable about an axis (L), and includes a connecting rod portion 10, a driven portion 12, a shoulder 11, a positioning portion 13, and a threaded portion 14. The connecting rod portion 10 has a through hole 101 extending transversely through one end thereof. The driven portion 12 includes a surrounding wall 121, a groove 122 defined by the surrounding wall 121, a through hole 125 extending transversely through the surrounding wall 121 and communicating with the groove 122, and a threaded hole 126 diametrically opposed to the through hole 125. The shoulder 11 is formed on one end of the driven portion 12, and is cylindrical, but is not limited thereto.
The connecting rod portion 10 has a shape corresponding to the groove 122, and is hexagonal, as shown in
In a modification of the locking member 1 of the embodiment, the connecting rod portion 10 thereof may be replaced by a hand tool (such as a drive rod, not shown) to drive the driven portion 12 to rotate therewith. Since the modification of the locking member 1 does not need the connecting rod portion 10, a protruding portion thereof may be reduced.
The positioning portion 13 has a conical shape, and includes a first tapered section 131 connected to the shoulder 11, and a second tapered section 132 connected to the first tapered section 131 at a side opposite to the shoulder 11. The positioning portion 13 gradually tapers from the first tapered section 131 to the second tapered section 132 in a direction away from the shoulder 11 along the axis (L). Each of the first and second tapered sections 131, 132 has a cross section smaller than that of the shoulder 11. In this embodiment, the first and second tapered sections 131, 132 are integrally formed as a single piece, and each of the first and second tapered sections 131, 132 has a taper ratio of 1:8. The shoulder 11 and the positioning portion 13 are integrally formed as a single piece.
The threaded portion 14 is connected to the second tapered section 132 at a side opposite to the first tapered section 131, and has an outer peripheral surface 142 formed with an external thread 141.
An alternative form of the locking member 1′ is shown in
Referring again to
The hoist ring assembly 3 is provided on the mounting surface 211 of the wall plate 21 to facilitate lifting and moving of the building formwork 2.
Referring to
As shown in
In a variation of this embodiment (not shown), the two building formwork apparatuses 100 may be stacked one above the other, after which the locking member 1 of an upper building formwork apparatus 100 is inserted through the positioning hole 221 of the building formwork 2 thereof into an aligned locking hole 222 in the building formwork 2 of a lower building formwork apparatus 100. Similarly, the locking member 1 of the lower building formwork apparatus 100 is inserted through the positioning hole 221 of the building formwork 2 thereof into an aligned locking hole 222 in the building formwork 2 of the upper building formwork apparatus 100. Afterwards, the connecting rod portion 10 of the locking member 1 of each building formwork apparatus 100 is rotated to engage the threaded portion 14 with the internally threaded section 225 of the aligned locking hole 222, thereby moving the two building formwork apparatuses 100 toward each other and to abut against each other. Hence, assembly of the two stacked building formwork apparatuses 100 is completed. By assembling the plurality of the building formwork apparatuses 100 vertically, the formwork wall 200 extending in the vertical direction can be formed.
It should be noted that the locking member 1 is rotated using a hand tool, such as a wrench (not shown). Further, with the driven portion 12, the shoulder 11 and the first tapered section 131 of the locking member 1 inserted into the positioning hole 221 of the frame 22 of the building formwork 2, deflection of the axis (L) can be limited.
After the assembly of the formwork wall 200 is completed, as shown in
In summary, through the insertion of the positioning portion 13 of the locking member 1 of the building formwork apparatus 100 of this disclosure into the positioning hole 221 of the frame 22 of the building formwork 2 thereof and through the threaded portion 14 thereof that is configured to engage the aligned locking hole 222 in the frame 22 of the building formwork 2 of an adjacent building formwork apparatus 100, the deflection of the axis (L) can be restricted to maintain stability of rotation during assembly; and after the assembly of the plurality of the building formwork apparatuses 100 that are arranged either horizontally or vertically to form the formwork wall 200, the mold surfaces 212 of the wall plates 21 of the building formworks 2 of the building formwork apparatuses 100 can be flush with each other. Therefore, the object of this disclosure can indeed be achieved.
While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
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110135146 | Sep 2021 | TW | national |