JPS6183003A - Hollow concrete product molding formwork - 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 Fields> This invention opens the inner formwork, which cannot be opened outward like the outer formwork, inward, thereby separating the contact surface from the concrete and making it easier to remove the inner formwork from the product. This invention relates to an inner formwork for forming concrete products that can be removed by removing the formwork.

<Prior art> When manufacturing a concrete product by placing an inner formwork for a space inside an outer cut frame, the inner formwork having the VfT section is squeezed inward to separate the inner formwork from the concrete peripheral wall and then removed from the mold. In order to link to a screw rod through a bracket etc. to a part of the inner formwork?
Is it possible to assemble and remove the inner formwork by pivoting it and operating the screw rods to bring the inner form close together and away? I was doing it.

<Problems to be Solved by the Invention> This invention shortens the time required for demolding and assembling the link mechanism by operating the screw rod, and also prevents poured concrete from flowing out due to loosening of the link due to strong vibrations. The purpose is to

Means for Solving the Problem> This invention, which achieves the above object, has one end of the link pivoted to the wall that is pushed into the divided part of the inner formwork from the inside, and the other end inserted into the space of the inner formwork. By fixing the 41 layers to vertically installed column members and operating the mutual link connection and retention shafts, it is easy to move from the closed position to the open position with a single movement, and to move them toward and away from each other by reverse operation. This makes it possible to greatly shorten the assembly work process, and since the lintels lock together beyond their line of action, loosening during vibration is also prevented.

Effects> This invention is a method of casting a hollow concrete product and removing it from the mold after hardening and curing, by squeezing the formwork, which cannot be opened inward like the outer formwork, inward to separate the surface that is in contact with the concrete. Then, approach the removable wall that inserts the inner formwork division giI5VC into the inner space of the same formwork.

One end of the link mechanism to be detached is attached entirely vertically to the column member, and the other end link metal removable wall 1/c@H is connected to the link.@Purple Move the removable wall from the inner formwork by moving it up and down. This will cause it to move away from the concrete product surface.

By squeezing the inner form through the butterfly 41 and then opening the outer form at a certain angle, the cast hollow concrete product can be easily removed from the form.

In addition, the column member is equipped with a link adjustment plate that can adjust the stroke of the link and its vI4 adjustment bolt, so once the wear is adjusted, it will be securely locked, so the movable wall will be in complete contact with the inner formwork, preventing vibrations. It also prevents concrete from flowing out.

As a result, the work of assembling and demolding the formwork can completely eliminate the manual work using screws in the narrow space of the formwork, and the work of assembling and demolishing hollow concrete products can be streamlined.

IM Example> Fig. 1 is a vertical #r view showing one embodiment of the present invention;
The figure is a plan view, FIGS. 3 and 4 are a sectional view and a plan view showing the differential state of the removable wall of the same type, and FIG. 6 is a perspective view of the product.

(2) is a formwork base, and near the center of the base, a column member 5 to which a link 16 is pivoted is vertically installed. Outer formwork 2ri butterfly! A link attachment shaft 12 for tightening ri is attached to the outer formwork of each part nl by 7.

The inner formwork 3 has a tl-port center VC hinge attached to it, and is removable by pushing it into the inner formwork where a part of the cylindrical peripheral wall of the opposite part is divided over the entire length and the missing part from the circle 1jjl+. One of the links is pivoted to the removable type partitioned into the wall 4, and the other link is attached to a link adjusting plate 17 VC@7f attached to a vertical column member 5.

The differential stroke of the link for 7 is adjusted by the adjustment ho! attached to the column member 5! The removable wall 4 of the same formwork can be adjusted freely by moving the link connecting shaft head 15 upward or downward using the parallel rick metal assembly jig A assembled in this way. It becomes possible to easily leave and approach from the inner surface of the body.

When demolding a product, the removable wall is separated from the inner formwork, and then squeezed inward through all the hinges 8 of the inner formwork to open the outer formwork 2 to the outside, making it easier to remove the poured concrete product. It depends on breaking away from the current framework.

Next, details of the assembly and demolding state will be explained based on the IC plane. Product [After demolding, clean the formwork and apply a release agent, align the outer formwork 2t with the outer edge of the bottom plate 6, and then tighten the clamp handle 11 to attach the outer formwork to the base. Secure the outer formwork to the stand ■.

Subsequently, the open inner formwork 3 is placed inside the bottom plate via the hinge 8, and the formwork is brought into close contact with the inner formwork 3 to stand by at the required position.

Place the assembly jig Ai above the head 15 of the connecting shaft 14 of the parallel link 16 as shown in Fig. 1, and insert the assembly jig under the column member 5 that fixes the other end of the link by pivoting. When the parallel links in the shape of a mountain are moved differentially, the pM wall 4 is pushed inward from the part of the peripheral wall of the gate frame 3 where it is desired to be chipped.
The inner form stopper 20 matches the frame stopper 19, and the inner form frame 3 and removable wall 4 are integrated into the inner form peripheral wall to form the required shape shown in FIG. 2.

At that time, a rubber seal 21 is attached to the storm contact surface where the inner formwork and the removable wall join to prevent concrete from leaking, so even if the formwork is shaken by vibration, the mortar that holds the fluidity will not leak out completely. Also, since the parallel links are locked in a clamped state beyond the horizontal action i- of the removable wall's @gradation point and the pivot point of the other column member, even a strong @strike during perturbation will prevent the formwork from loosening. It is tightly fitted without any cracks.

Furthermore, even if the joint is worn out, the link stroke can be freely adjusted using the link adjustment crab plate 17r bolt 18 depending on the wear of the contact part.

After the mold is completed, the reinforcing steel metal is inserted from above, moved to a vibration table (not shown), concrete is poured from above, and after vibration filling, the product is moved to the honor room where the upper surface of the product is finished with gold finish ink 22. To mold the entire product after curing and curing, first fit the pipe part A of the assembly jig A to the outer formwork tightening knob I, release the clamping metal fittings, and then attach the hinge metal fittings. Open the outer formwork 2 on both sides, then use the assembly jig A to release the parallel links from the locked state in the same manner as during assembly.
When the flat part A/ of is inserted under the column member 5 and rotated differentially, the removable wall 4 separates to the inside 1 from the inner formwork peripheral wall that is not in contact with the concrete, and the shape shown in Figure 3 is created. VC connection shaft 14
0. Next, in order to remove the mold from the inside of the inner formwork 3 metal product, as shown in Figure 4, the inner formwork 91+1 is moved upward, and the inner formwork that is part of the hinge is removed. (inside), sent by.

After the formwork has been disassembled in this way, the product can be easily removed from the formwork by pulling it upward with a hoist or the like. After cleaning the formwork from which the product has been removed, a release agent is applied. Then, the mold is reassembled and moved to the concrete placement site.

Is this an example of manufacturing a circular ready-mixed concrete product using this formwork? As explained above, as shown in FIG. 5, one end of the connecting lever 23 is engaged with the metal via the bracket 24 on both sides of the divided capital, and the other end is mutually engaged with the link 16 which is pivotally connected to the removable wall. By differentially moving the connecting shaft 15t, it is also possible to move the dividing parts on both sides inward in synchrony to make demolding easier. In this way, this formwork can be used to form a circular shape 1 having a hollow part. It is possible to greatly shorten the time required for assembling and disassembling the formwork for hollow concrete products in a single process.<Effect of the invention> The same formwork for conventional hollow part r-shoulder products. When demolding a formwork with a core or core, it cannot be removed and opened like the outer formwork, so use screws, etc. to twist it inward and remove it from the concrete adhesion surface to remove the inner formwork. , the outer form was opened and the product was removed from the outer form.

However, demolding work by squeezing the inner formwork by driving the terminal rod in the narrow space of the inner formwork is considered inefficient, and has become a practice of demolding work in which the inner formwork and core roll. The formwork of the present invention does not require time-consuming operations such as screwing screws, and can be moved from the open position to the inner formwork by moving it from the open position to the inner formwork. The enemy attempted to break away from the surrounding wall and approach it.

This will greatly reduce the time required for formwork assembly and demolding, and will also prevent concrete from flowing out due to loosening of the screws during vibration, increasing the number of hairs produced per person. I closed it, so I went to b.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Figs. 3 and 4 are a sectional view and a plan view showing the differential state of the removable wall, and Fig. 5. is a plan view of another implementation t11,
Figure 6 is a perspective view of the product.
...Bottom plate fixing bolt, 10...Outer formwork collar, 13...Tightening link adjustment bolt, 15.
...Connection shaft head, l7...Link adjustment plate, 22...Removable wall! l! 14IN Department, 23...
...Connection lever. Patent applicant Chiyoda Giken Kogyo Co., Ltd. ¥11 Figure 2 Figure #3) Note 71';#4) Tagai! 1'1z six days

Claims (2)

[Claims] (1) A part of the cylindrical peripheral wall of the inner mold 2 is divided over its entire length, and the removable wall 4 is pushed into the chipped peripheral wall portion from inside to connect the inner mold frame wall surfaces together. In a hollow concrete product forming form consisting of an outer formwork that forms the outside of the product, one end of the link is pivoted to the inner surface of the peripheral wall of the removable wall in order to allow the removable wall to approach and separate, and the other end of the link is connected to the inner formwork. The mutual links 16 are pivoted and fixed to the pillar members 5 installed in the inner space.
This formwork for forming hollow concrete products is characterized in that the removable wall is connected to and separated from the inner surface of the peripheral wall of the inner formwork by differentially moving a connecting shaft 15 that connects the two. (2) In the molding form described in the previous section, the pivoting part 22 of the removable wall is formed by mutually engaging one end of the connecting lever 23 and the other end thereof with the inner surface of both side peripheral walls of the inner formwork dividing part. A formwork for forming a hollow concrete product according to claim 1, which is characterized by: