JPS61229503A - Core frame for molding ditch block - 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 - Industrial Application Field - The present invention relates to a concrete block forming agent Φ form, which includes the structure of a core frame used to form a cylindrical cavity inside the block; In particular, it relates to its opening/closing structure.

Background of a technology - The gutter block, or slit gutter, is generally called a gutter block or slit gutter, which forms a drainage ditch for a road into a ditch, and also has a narrow slit for drainage at the end of the road.

It is opened and has a shape as shown in FIG. 6 or 7. The groove 30 that will become the underdrain is formed by using a cylindrical inner core frame, but after the concrete hardens, the core frame is squeezed inward and removed from the mold in the longitudinal direction. ``4''''F* during block molding.
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Block removal: Various structures are known, especially those that squeeze the core frame, but conventionally, the structure that squeezes the core frame using a toggle mechanism or screw mechanism has been used. In order to obtain the allowance, the core frame was made into a split structure.

The structure is such that it can be removed by removing the frame plate ψ-1. Further, in order to fasten the core frame to the edge plate during molding, a structure is adopted in which the core frame and the edge plate are fastened using a large number of nine bolts, cranes, and pulls.

However, with such a conventional structure, the assembly and demolding of the formwork is extremely complicated, the work efficiency is poor, and the work requires a large number of hands and takes time. It also had the disadvantage of being difficult.

OBJECT OF THE INVENTION The object of the present invention is to provide a core frame having a structure particularly effective for forming concrete blocks having a longitudinal slit 31 communicating with a groove 30 serving as an underdrain. By using a member for forming the slit 31, insertion and removal of the member and opening and closing of the core frame can be easily performed in one operation.

Configuration of the Invention - To explain using the reference numerals given to the illustrated embodiments, the core frame for molding groove blocks of the present invention has a cylindrical frame plate 5 of a core frame 4.
A longitudinal slit 6 is provided in the slit 6, and a wedge member 14 is provided that is inserted into this slit from the inside to expand the core frame 4. A connecting member 13 that connects the frame plates 5b and 5b on both sides of the slit 6 is provided. , 24, 26, 27 are provided,
The connecting member is arranged to engage and tension the wedge member 14 exiting the slit 6, and the connecting member is arranged to engage and tension the wedge member 14 exiting the slit 6.
The wedge member moves a predetermined distance when withdrawn from the frame plate 5, and then engages the connecting members 13, 24, 26, 27 and tensions them, thereby deforming the frame plate 5 in the direction of narrowing the slit 6. That is.

One effect is that the longitudinal wedge member 14 forming the slit 31 of the block is made to protrude and retract from the inside of the core frame 4, and the slit 6 for protruding and retracting the wedge member is used as the drawing margin of the frame plate 5 of the core frame. By inserting the wedge member 14 into the slit 6, the core frame 4 can be expanded and fastened to the opening 2a of the edge plate 20 without any gap, and the frame plates on both sides of the slit 6 can be tightened. 5b, 5b mutually connecting members 13, 2
4.26.27, and when the wedge member 14 is withdrawn from the slit 6, the predetermined floating rear member 14 and the connecting members 13, 24, 26, 27 are substantially engaged, and this After the engagement, by further withdrawing the wedge member 14, the frame plates 5b, 5b on both sides are connected via the connecting members 13, 24, 26, 27.
The core frame 4 is squeezed by being pulled together.

-Embodiment- Figures 1 to 3 show an embodiment of the present invention. FIG. 3 is a diagram showing the mold for molding the block shown in FIG. 7 with one side plate open, in which 1 is a substrate, 2.
2 is an edge plate, 3, 3 is a side plate, and 4 is a core frame of the present invention.

FIG. 1 is an enlarged side view of the core frame 4, in which 5 is a cylindrical frame plate having a longitudinal slit 6, 7, 7 and 8 are reinforcing plates fixed to the frame plate 5, and 9, 9 are A stringer made of a square pipe fixed to a reinforcing plate 8; 10 a bearing plate fixed between the stringers 9; 11 a bearing fixed to the bearing plate 10; 12.
12 is a pin planted in the reinforcing plate 7.7, 13 is a pin 12
．． A connecting member 14 is a wedge member that is inserted into and removed from the slit 6 from the inside.

No reinforcing plates are provided at the upper corners 5a, 5a of the frame plate 5, and the core frame 4 is squeezed by elastic deformation of the frame plate 5 at the upper corners.

FIG. 2 is a diagram showing a mechanism for inserting and extracting the wedge member 14 into and out of the slit 6. Reference numeral 15 is a screw screw rotatably supported on a bearing 11 but not axially movable. are provided with screws 16a, 16b in opposite directions, that is, a right-hand screw 16a and a left-hand screw 16b. 17.17 is screw 16
Nut members screwed into a and 16b, respectively; 18.
18 is a pin implanted on both sides of the nut member 17.17;
19.19 is a pin passed through the protrusion 20 formed on the upper edge of the wedge member 14; 21.21 is a link that pivotally connects the pins 18 and 19; and 22 is a handle for rotating the screw punch 15. It is.

Next, the expanding and squeezing operations of the core frame 4 during mold assembly and mold removal will be described with reference to FIGS. 1 to 3.

When the core frame 4 is inserted into the opening 2a of the edge plate 2 and its both ends are supported by the edge plate 2.2, and the screw punch 15 is rotated in a direction in which the NAND members 17.17 approach each other, the connecting link 21 .21 respectively rotate in the rising direction about the pin 19, pushing the wedge member j4 downward. When the wedge member 14 is moved downward, the slit 6 is expanded due to the imitation effect, and the frame plate 5 is expanded by elastic deformation of both upper limit portions 5a and 5a, and is tightened into the opening 2a'' of the edge plate 2! The wedge member 14 protruding from the slit 6 functions as a mold for forming the slit 31 of the block.

After the block is formed - when opening the block, the screws 1517 move away from each other and the connecting links 21.21 pivot in the direction of collapse, so the 4g member 1.4 is pulled up and the slit 6 A gap is created between the and the wedge member 14.

When the #11 member 14 is further pulled up, the protrusion 20 on the upper edge of the wedge member 14 comes into contact with the connecting member 13, and as the wedge member moves up further, the connecting member 13 is moved as shown in FIG. Use a wire to bend the thread. As a result of this bending, the upper limits 5a, 5a of the pins 12, 12 are bent inward, and the core frame 4 is squeezed, creating a gap between the molded block and the core frame 4, which is necessary for removing the mold. Opening 2 of small edge plate 2
The core frame 4 can be demolded by pulling it out in the longitudinal direction through a. Third. The formwork shown in the figure has balls 23 on the edge plate 2 that support the core frame 4 during demolding.
．． In the above embodiment, the frame plates 5b, 5b on both sides of the slit 6 are provided with pins 12 and 12 so that the core frame 4 can be pulled out with a light force.
Although a connecting member 13 made of a strip plate is used as a connecting member, wires 24 and 24 can also be used as the connecting member as shown in FIG. 4. In the embodiment shown in FIG. pin li"", 12 and wedge member 14. pins 25 implanted in the upper edge of the wires 24 and 24, respectively.
When the wedge member 14 moves up a predetermined distance, the wires are tensioned between the two pins 12.25, and the subsequent upward movement of the wedge member 14 causes the wires 24.24 to connect the pins 12.12. are drawn toward each other. Furthermore, although this is not a highly recommended structure in terms of cost, it is of course possible to adopt a structure in which the pins 12 and 12 are connected by links 26, 27, and 26, as shown in FIG.

-Effects of the Invention- According to the core frame of the present invention as described above, the core frame can be expanded and narrowed by moving the wedge member forward and backward, and the core frame is strong enough for imitation during expansion. By retracting the wedge member for forming the slit 31 of the block, the core frame can be tightened at the same time. The work of demolding the frame can be done efficiently. In addition, since it is possible to assemble and demold the core frame with simple operations, it is also easy to automatically open and close the mold, which greatly improves the molding work of groove blocks. This has the effect that productivity can also be improved.

[Brief explanation of the drawing]

1 to 3 are views showing one embodiment of the present invention, in which FIG. 1 is a side view of the core frame, FIG. 2 is a perspective view showing the advancing and retracting mechanism of the wedge member, and FIG. FIG. 3 is an overall side view of the formwork shown with the side plates opened. 4 and 5 are side views schematically showing other embodiments of the present invention, and FIGS. 6 and 7 are perspective views showing examples of molded blocks. □Fig. 15 is a wedge member, 15 is a rod,
16a and 16b are screws in opposite directions, 17 is a NAND member □, 21 is a link, 24 is a wire, and 26.27 is a connecting link.

Claims (1)

[Claims] 1. A longitudinal slit is provided in the cylindrical frame plate of the core frame, and a wedge member is provided that is inserted into the slit from the inside to expand the core frame, and the frame plates on both sides of the slit are mutually connected. A connecting member is provided for connecting the slits, and the connecting member is arranged to engage and tension the wedge member exiting the slit, and after the wedge member has moved a predetermined distance when the wedge member exits the slit. A core frame for molding a groove block, characterized in that a frame plate is deformed in a direction that narrows the slit by engaging and tensioning a connecting member.