JPH046523B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention aligns reinforcing materials parallel to the side plates of the formwork with high positional accuracy within a formwork for producing ALC (autoclave-cured lightweight aerated concrete). This relates to a reinforcement material fixing device for ALC. [Prior art] Generally, ALC raw materials are injected into a formwork in which reinforcing materials are arranged to produce semi-plastic concrete blocks, which are then cut with piano wire and then cured at high temperatures in an autoclave.
Manufactures panels. The market for ALC panels has been rapidly expanding in recent years due to their high strength, light weight, insulation properties, and ease of installation. The reinforcing material is added to increase the tensile strength of the ALC panel, which is weak because it is made of cement. This reinforcing material is aligned in the formwork before or after pouring raw materials into the formwork during the ALC panel manufacturing process, but if the reinforcing material is not aligned in the proper position of the mortar after hardening, When cutting mortar blocks, the reinforcing material hits the cutting blade and damages the cutting tool, and the reinforcing material is exposed on the surface of the ALC panel, damaging its appearance. Furthermore, if reinforcing materials are not inserted at predetermined positions within the ALC panel, the calculated strength will not be achieved, which is a serious consequence. It is therefore important that, after the manufacture of a semi-plastic concrete block, the reinforcing material is precisely placed in the predetermined position within the block. By the way, conventionally, as shown in FIG. 1, reinforcing material fixing jigs 2' are suspended from a plurality of fixing jig mounting frames 3
The reinforcing materials 1 are supported by the corresponding fixing jigs 2' of each frame 3, and the reinforcing materials 1 are arranged in the formwork 6 by straddling the said 3 between the formwork side plates 5. The fixing jig 2' is also suspended within the formwork 6. For this reason, the reinforcing material is pushed by the injection pressure of the raw material and the foaming pressure of the foaming agent in the raw material and cannot be avoided from the problem that it moves from its position within the mold. Therefore, in order to fix the position of the reinforcing material when it is placed in the formwork, the thickness of the reinforcing material fixing jig is increased. One possible method is to make a blind hole in the bottom plate of the form and insert the tip of the jig into it. However, in this method, the diameter of the hole formed in the product increases when the jig is removed after manufacturing the semi-plastic concrete block, and the strength of the product decreases. In this method, the jig cannot be used unless the position of the jig is determined, and cleaning the hole and inserting the jig into the hole require a great deal of effort. Well, from experience, it is possible to predict the movement of the reinforcing material due to raw material injection and foaming, and then shift the position of the reinforcing material in advance so that it will be placed in a predetermined position due to that movement, but this method does not work. However, maintaining the position of the reinforcing material becomes complicated, and the position of the reinforcing material within the product cannot be precisely controlled. [Objective of the Invention] The present invention was devised to solve the above-mentioned conventional problems, and it is an object of the present invention to enable the position of the reinforcing material within the formwork to be fixed with high precision regardless of the raw material injection pressure or foaming pressure. With the goal. [Structure of the Invention] The reinforcing material fixing device for ALC of the present invention is such that the upper end of the reinforcing material fixing jig that supports the reinforcing material is attached to the fixing jig mounting frame, and the lower end of the reinforcing material fixing jig is attached to the mold. The fixing jig mounting frame is placed in contact with the frame bottom plate, and the fixing jig mounting frame is placed across between the side plates of the formwork, so that the lower end of the fixing jig is horizontally displaced on the formwork bottom plate during injection of raw materials into the formwork and foaming. It is characterized by generating a magnetic force that does not move between the lower end of the jig and the bottom plate of the formwork. [Embodiment] As shown in FIG. 2, the device of the present invention is such that the upper end of a reinforcing material fixing jig 2B that supports a reinforcing material 1 is attached to a fixing jig mounting frame 3, and the reinforcing material fixing jig 2
The lower end of the other end of B is brought into contact with the formwork bottom plate 4, and the fixing jig mounting frame 3 is placed astride between the formwork side plates 5.
Then, the lower end of the reinforcing material fixing jig 2B and the formwork bottom plate 4
The lower end of the jig is used for injecting the raw material into the formwork 6,
At the time of foaming, a magnetic force is generated on the bottom plate 4 of the formwork to a size that does not cause it to shift in the horizontal direction. The magnitude of the frictional force generated depends on the contact force between the lower end of the reinforcing material fixing jig 2B and the formwork bottom plate 4, the contact area, the friction coefficient of the contact surface, and the shape of the lower end of the jig.
The frictional force that can prevent the lower end of the reinforcing material fixing jig 2B from shifting horizontally on the bottom plate 4 of the formwork during injection of the raw material into the formwork 6 and foaming can be determined by adjusting the contact force through experiments. It is obtained as a corresponding one. In the inventor's experiments, at least 0.5 kg was required. The reinforcing material fixing jig 2B utilizes magnetic adsorption, and an example thereof will be explained with reference to FIGS. A cylindrical magnet 20 and a reinforcing material support fitting 14 are provided at the lower end. Reference numeral 21 denotes a shaft rotatably fitted and suspended by the support member 19. A lever 22 is provided at the upper end of the shaft 21, and a columnar magnet 23 is provided at the lower end. As shown in FIG. 4, the magnets 20 and 23 have opposite magnetic poles glued together with insulators 24 and 25 in between, and when placed in the formwork 6, the same magnetic poles are used. The device of the present invention uses such a reinforcing material fixing jig 2B.
is suspended from the fixing jig mounting frame 3, and the lower end of the jig (the lower end of the magnet 20) is brought into contact with the formwork bottom plate 4, and the formwork bottom plate 4 is attached by magnetic attraction by the magnets 20 and 23.
Thus, the reinforcing material fixing jig 2B is supported at both ends by the fixing jig mounting frame 3 and the formwork bottom plate 4. When demolding, rotate the lever 22 180° to remove the magnet 2.
By aligning the opposite magnetic poles of 0 and 23, the magnetic adsorption force on the formwork bottom plate 4 can be canceled and the reinforcing material fixing jig 2B can be separated from the formwork bottom plate 4. [Effects of the Invention] As described above, the present invention has a structure in which the reinforcing material fixing jig for supporting the reinforcing material is fixed in the formwork with both ends supported by the fixing jig mounting frame and the formwork bottom plate.
The reinforcing material can be reliably held at a fixed position within the mold against the force applied when the raw material is injected into the mold and foamed. Therefore, the reinforcing material can be placed in the center of the product with high accuracy, ensuring the strength and quality of the product. Incidentally, in the present invention, the reinforcing material fixing jig 2B
The magnetic forces of the magnets 20 and 23 are adjusted so that when a spring is attached to the lower end and the jig is pulled horizontally, the tensile force at the moment when the lower end of the jig starts to slide on the formwork bottom plate 4 is 0.5 kg-f. When adjusted, the accuracy of the dimension (cover) from the front surface of the product to the reinforcement 1 was significantly improved compared to the conventional device, as shown in the following table. 【table】

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the conventional device, Fig. 2 is a schematic diagram of the device of the present invention, Fig. 3 is a front view showing a cross section of the main part of the reinforcing material fixing jig, and Fig. 4 is the - line in Fig. 3. It is an enlarged sectional view. 1...Reinforcement material, 2B...Reinforcement material fixing jig, 3...
...Fixing jig mounting frame, 4...Formwork bottom plate, 5...Formwork side plate, 6...Formwork, 7...Upper member, 8...Handle,
12... Lower member, 14... Reinforcement support metal fitting, 19
...Supporting member, 20, 23...Magnet, 21...
Shaft, 22... lever, 24, 25... insulator.

Claims (1)

[Claims] 1. Attach the upper end of the reinforcing material fixing jig that supports the reinforcing material to the fixing jig mounting frame, and bring the lower end of the reinforcing material fixing jig into contact with the bottom plate of the form, and then attach the said fixing jig mounting frame to the mold. The lower end of the reinforcing material fixing jig applies a magnetic force large enough to prevent horizontal displacement on the bottom plate of the formwork during injection of raw materials into the formwork and foaming, between the lower end of the jig and the formwork. It is characterized by being generated between the bottom plates.
Reinforcement fixing device for ALC.