JPH0540963Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to an opening/closing mechanism for a frame plate of a concrete block molding form, and particularly relates to a mechanism for retracting an open frame plate.

<Prior art> The opening/closing mechanism of the formwork is a horizontal hinge type in which the frame plates (side plates, end plates, edge plates, etc.) are opened by swinging around a support shaft provided on the lower side; Parallel type that opens by moving parallel to the direction perpendicular to the surface, vertical hinge type that opens by horizontally rotating the frame plate around a hinge on the side, and removable type that allows the frame plate to be removed. There are things like that.

<<Problems to be solved by the invention>> For large blocks, especially those with hollow holes such as box culverts, it is more convenient to demold the blocks using a forklift after forming. However, the horizontal hinge type and parallel movement type cannot be removed from the mold using a forklift because the open frame plate gets in the way. Vertically hinged models require a large open space and require 4
It cannot be used in formwork with a structure that opens all sides. If the frame is removable, there is a risk that the removed frame plate may fall over and cause a serious accident.

The purpose of this invention is to provide a formwork opening/closing structure that allows the blocks to be demolded using a forklift, requires a small space for opening the mold, and provides a stable open frame plate without the risk of it collapsing. There is.

<Means for Solving the Problems> The retraction mechanism for the frame plate of the block molding form according to the present invention is provided with a lateral movement guide 10 extending parallel to the frame plate surface below the frame plate 6. Movable stand 1
1 is movably supported, and a frame plate 6 is supported on the movable base so as to be openable and closable in a direction perpendicular to the frame plate surface. In order to avoid the danger of the open frame plate moving unintentionally, fixing means 16, 20 for fixing the frame plate 6 at its open end may be provided.

<<Operation>> When opening the mold, the frame plate 6 is opened along the opening/closing guide 14 to separate the frame plate 6 from the block, and the frame plate 6 is fixed on the movable base 11 by the fixing means 16 and 20.
The movable table 11 is moved along the lateral movement guide 10. This operation opens one side of the form, and the block is removed from that side using a forklift. The mold clamping is performed in the opposite manner to the above, and when the frame plate 6 is fastened, the movable base 11 is also fixed.

《Example》 Figures 1 to 5 show the retraction mechanism of the frame plate of the present invention, taking a box culvert molding form as an example. Figure 1 is a perspective view of the main part, Figure 2 is a plan view,
FIG. 3 is a sectional view of section A in FIG. 2. In the figure, 1 is the base of the formwork, 2 is the base frame provided on the top surface of the base 1, 3 is the bottom plate fixed to the base frame 2, and 4 is the support shaft 5 provided on the side wall of the base frame 2. 6 is an end plate that is in contact with the side edges of the side plates 4 on both sides, 7 is a core-shaped insertion hole formed in the center of the end plate 6, and 8 is a hole in the end plate 6. It is a rectangular frame with two I-beams 9 extending downward in the direction of the end plate, and the rectangular frame and the base 1 are substantially integrated.

10 is a rail arranged in parallel on the I-shaped steel 9; 11 is a movable platform movably supported on the rail 10 by four wheels 12 pivoted on the bottom surface; 13;
14 is a groove formed on the side surface of the movable base 11 perpendicular to the rail 10; 14 is a rail provided on the top surface of the movable base 11 in the same direction as the groove 13; 15 is a stopper fixed to the tip of the rail 14; 17 is a locking pipe fixed to the stopper 15, and 17 is an L-shaped member fixed to the movable table 11, the tip of which is connected to the groove 9 of the I-shaped steel in the rectangular frame.
It is involved in a. 18 is 2 which is pivoted on the bottom.
The support girder is movably supported on the rail 14 by wheels 19, and its base end is fixed to the end plate 6. 20 is a locking tube fixed to the tip of the support spar 18, and 21 is an L fixed to the side of the tip of the support spar 18.
It is a shaped member, and its tip is engaged in the groove 13 of the movable base 11.

Next, the retracting operation of the end plate 6 when opening the mold will be explained with reference to FIGS. 2 to 5.

Once the concrete poured into the formwork has hardened,
Remove the core (not shown) from the core mold insertion hole 7,
The end plate 6 shown in the third figure is moved in parallel along the rail 14 to open the end plate 6. The support girder 18 integrated with the end plate 6 is locked to the movable base 11 via the L-shaped member 21, and the movable stand 11 is locked to the rectangular frame 8 via the L-shaped member 17, so that the end plate 6 There is no risk of it collapsing during its movement. When the tip of the support beam 18 of the end plate comes into contact with the stopper 15, the pin 22 is inserted through the locking tubes 16, 20 to fix the end plate 6 to the movable base 11. Next, the movable base 11 is moved laterally along the rail 10 to retract the end plate 6 and open the end plate abutting surface of the block (FIG. 5). If necessary, the movable base 11 is fixed to the rectangular frame 8 at its retracted position. Then, the side plates 4, 4 are swung around their support shafts 5 to complete the mold opening, and the block is removed from the mold by a forklift from the opened end plate abutting surface. The mold clamping can be easily done by performing the operation opposite to the above-mentioned operation, and when the end plate is fastened, the movable base 11 is also fixed at the same time.

<<Effects of the invention>> As described above, according to the frame plate retraction mechanism according to the present invention, the frame plates such as the end plate can be completely retracted from the side of the block, so that the block can be demolded using a forklift. It becomes possible. In addition, since the opened frame plate is kept stable on the movable base, there is no risk of an accident due to collapse, and the space required for opening the frame plate is also advantageous.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the frame plate retraction mechanism of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a sectional view of section A in Fig. 2, and Fig. 4 shows the frame plate during evacuation. The plan view, FIG. 5, is a cross-sectional view of section B in FIG. 4. In the figure, 6... end plate, 10... rail (lateral movement guide), 11... movable base, 14... rail (opening/closing guide), 16, 20... locking tube, 22... pin.

Claims (1)

[Claims for Utility Model Registration] (1) A lateral movement guide 10 is provided below the frame plate 6 and extends parallel to the frame plate surface, and a movable base 11 is supported so as to be movable along the lateral movement guide. A retraction mechanism for a frame plate of a block molding form, characterized in that a frame plate 6 is mounted on the movable base so as to be openable and closable in a direction perpendicular to the frame plate surface. (2) Fixing means 1 for fixing the frame plate 6 at its open end
6. A retraction mechanism for a frame plate of a block forming form according to claim 1, further comprising: 6 and 20.