JPH01221204A - Mold releasing device for secondary product of concrete - Google Patents

Abstract

PURPOSE:To feed products effectively while mold release operation is carried out easily and smoothly by a method in which the engaging part of a frame-lifting device is engaged, in impact from under side, to the part of a frame to be engaged, and the impact during their engagement is practically used for the separation of the product from the frame. CONSTITUTION:The frame 2 on the holder 10 of a mold release device receives a product, e.g., a known block product. A frame-lifting device 20 is engaged to the frame 2 and raised it upward. The movable member 32 of a product-pushing device 30 is knocked against the template 3 bonded in contact with the upper surface 1a of the stay-bottom of the product. The frame-lifting device 20 and the product-pushing device 30 are fixed to the movable frame body 40 supported by a stationary frame body 50 in hanging manner. The freely moving scope, in which the movable frame body 40 is movable up and down, is set in between the movable frame body 40 and the stationary frame body 50. The product-pushing device 30 is driven by lowering and elevates the movable frame body 40 repellently in the range of said scope. Then the engaging part 27 provided in the frame-lifting device 20 is engaged, in impact from under side, to the part 2a of the frame 2 to be engaged, thereby separating the product 1 from the frame 2.

Description

[Detailed description of the invention] [Industrial use! F? ] The present invention relates to a demolding mold used for separating a secondary concrete product such as a machi block from a molding form.

[Prior Art] A typical conventional mold removal device transports and places the formwork on a support stand, and hooks the end claw of the hanging arm of the formwork moving device onto the formwork to remove only the formwork. There is a device in which the product is pulled up and left on the support stand. In this conventional demolding device, vibration is applied to the mold by operating an attached vibrator in order to facilitate separation of the product from the inner surface of the mold.

[Problem 8 to be solved by the invention] However, as a practical matter, while the product is on the support stand, the product and the formwork do not separate, and the product remains attached to the formwork and is lifted to a certain height together with the formwork. The product often separated from the formwork and fell onto the support platform. In this way, falling under incompletely cured conditions can cause parts of the product to be missing or cracks, and the high incidence of defective products during demolding is a major concern in the manufacturing of secondary concrete products. This was one of the major problems in the

In addition, since it is difficult to check for /l cracks inside the product, it is possible to use the product as it is as a component of a concrete structure, leading to a dangerous situation where the strength of the concrete structure decreases. Ta.

To prevent the product from being lifted while still attached to the formwork,
It would be better to extend the vibration application time before lifting the formwork to completely separate the formwork and product on the support stand, but such a vibration process may actually encourage cracking. became.

On the other hand, the demolding device disclosed in Japanese Patent Publication No. 57-48369 is equipped with a product tensioning device that comes into contact with the product surface that intersects the moving direction of the formwork or the template attached to this product surface. , in which only the formwork is moved while the product tensioning device prevents movement of the product in the demolding direction. In this conventional device, the product is held stationary on the support table throughout the entire movement process of the formwork, so there is no chance of the product falling off, and vibrations are not applied to promote separation between the formwork and the product. This prevents product damage and cracks from occurring.

However, the formwork separated from the product is simply lifted above the support stand, so in order to move the formwork to the next process such as formwork cleaning, the formwork must be transferred to a separately equipped transport device. After placing and releasing the bond between the formwork and the lifting device, it is necessary to drive the conveying device to remove the formwork from the demolding area.

Therefore, an object of the present invention is to provide a demolding device that can demold a product without damaging the product or causing cracks, and contributes to reducing the incidence of defective products during demolding and ensuring product strength. That's true.

A further object of the present invention is to be able to remove the product from the mold without damaging the product or causing cracks, and to be able to immediately transport the formwork that has been separated from the product to the next process by hanging it in a suspended state. The objective is to provide a demolding device that can

[Means for Solving the Problems] The demolding mold for secondary concrete products of the present invention will be described below using reference numerals in the attached drawings.

Support stand (lO) for formwork (2) containing product (1)
and; A formwork lifting device (20) that engages with the formwork (2) and moves the formwork (2) upward; and: A movable member (32) that covers the top surface of the product (1a) or the top surface of the product (1a). The attached template (
3) A device (30) is used to press the product against the formwork lifting device (20); A fixed frame body (50) that suspends the product is provided, and a free movement margin is set between the movable frame body (40) and the fixed frame body (50) to allow the movable frame body (40) to move up and down, and the product is pressed. drives the device (30) downward and moves the movable frame body (40) upward within the range of the free movement, and the engaging portion (27) of the formwork lifting device (20)
The product (1) and the formwork (2) are separated from each other by being brought into collision engagement with the engaged portion (2a) of the formwork (2) from below.

[Function] The formwork (2) containing the product (1), which has self-retaining properties and is hardened to the extent that it will not easily collapse or be damaged by the impact or load applied during transport to the curing yard, It is conveyed to the support stand (10) and stopped and held at a predetermined position by suitable means. The formwork lifting device (20) that was waiting in the space above the support stand (io) is driven downward toward the formwork (2), and the engaging portion (2) of the formwork lifting device (30) is driven downward toward the formwork (2).
7) is arranged below the engaged portion (2a) of the formwork (2). In addition, the device (30) is driven to press the product, and its movable member (32) is brought into contact with the top surface (1a) of the product. After this, the product pressing device is driven downward, and when the movable member (32) presses the product (1) against the support base (10), this pressing is caused by the reaction of the operation.
0) is driven upward.

In order to allow the movable frame (40) to move up and down, the fixed frame (40)
50) and the movable frame body (40).
However, since the product pressing is larger than the gap (G3) between the engaging part (27) and the secured part (2a) before starting the device (30), the repulsive upward movement process of the movable frame (40) At the engaging part (
27) collides with the engaged portion (2a) from below, and this impact separates the product (1) and the formwork (2). After the mold (2) and the product are separated, the movable member (32) of the product pressing device (30) is preferably stopped and held at that position.
When the formwork (2) is further pulled up by driving the formwork lifting device (20), the product (1) is held stationary at the initial position on the support stand (lO).

Incidentally, at this stage, the product (1) and the formwork (2) have already been separated, so for product pressing, the movable member (31) of the device is moved upward together with the formwork lifting device (20), The product can also be pressed by moving the movable member (31) of the device upward in advance of the formwork lifting device (20). The demolded product (1) on the support stand (10) is carried out to a curing yard or a shipping yard.

[Example] In the illustrated example, the cast concrete secondary product (1) is a machi block, and the formwork (2) is a double cast concrete block.
are installed in parallel on the base frame (5), and a face plate (4) for molding the front part of the product (1) is fixed to the base frame (5). This base frame (5) is conveyed along the rail portion (11) of the support platform (10) with the intervention of suitable roller means. In this example, the product is pressed by the movable member (32) of the device (30).
) is directly abutted against the upper surface (!a) of the butt end of the machi block product (1), but as shown in Figure 3, in the case of a centrifugally molded or press molded product (+) is abutted against the template (3) inserted into the butt end of the formwork (2). In addition, for cast molded products, the top surface (1a
) to avoid leaving any impression marks due to localized pressing of the parts (
It can also be inserted between 1a).

The formwork lifting device (20) includes a pair of hydraulic cylinders (21) vertically fixed to a movable frame body (40), and a horizontal frame (22) fixed to the lower end of the piston rod of the hydraulic cylinders (21). ), and a pair of fluid pressure cylinders (
24), and a pair of left and right suspensions supported by a horizontal pivot (28) at the end of the horizontal frame (22), and whose upper end is connected to the tip of the piston rod of the fluid pressure cylinder (24) by a horizontal pivot (25). The lower end of the lifting arm (26) has a claw part (27) projecting inward.

The horizontal frame (2) is moved by the operation of the fluid pressure cylinder (21).
2) moves up and down, and the suspension arm (26) swings and rotates about the horizontal pivot (28) by the operation of the wave body pressure cylinder (24). When the horizontal frame (22) is lowered, the left and right pair of hanging arms (26) are in a standby state opened outward, and after the horizontal frame (22) is lowered to a predetermined position, each hanging arm (26) ) rotates inward, and the tip (27) comes to a position directly below the extending plate part (2a) of the formwork (2).

The formwork (2) has a horizontal pivot (2c
) can be rotated outwards around the center. The stopper means for fixing and holding the side component (2b) to the mold body is released manually or automatically prior to the demolding operation.

The product pressing device (30) consists of a fluid pressure cylinder (31) fixed vertically to a movable frame (40), and a movable wide diameter cylindrical cylinder fixed to the lower end of the piston rod of the fluid pressure cylinder (32). It is composed of a member (32).

In this embodiment, the movable frame (40) is also movable in the horizontal direction, and the U-shaped cross-section bearing stands (
A pair of rollers (41) are attached to the inner surfaces of the upright wall portions (43) and (44) of 42) by means of a horizontal shaft (45). A horizontal fixed frame (5o) having an H-shaped cross section is fixed to a fixed machine frame (60).
) on the left and right rail portions (51) of the pair of rollers (41).
) are fitted.

The upper horizontal wall portion (52) of the rail portion (51) and the roller (4)
1) The distance (Gl) between the lower horizontal wall part (53) of the rail part (51) and the bottom wall plate part (4) of the bearing stand (42) is
B) is larger than the interval (G2) between the interval (a+)
The difference between the space (G2) and the space (G2) is the margin for vertical movement of the movable frame (40). In addition, as shown in FIG. 3, contrary to this example, the rail part (47) may be provided on the side of the movable frame (40), and the roller (50) may be provided on the side of the fixed frame (50). can.

In another embodiment shown in FIG.
), the formwork transfer means (70) is inserted into the space below the formwork (2) by linear sliding or turning MvJ. The formwork lifting device (20) is operated to remove the engaging portion (
27) from the engaged portion (2a) of the formwork (2) to open the formwork (2), the formwork (2) is placed on the formwork transfer means (70) and The frame is transferred to the next process such as cleaning the frame by the linear movement or rotational movement of the frame transfer means (70).

[Effect of the invention] As described above, in the demolding device of the invention, the fixed frame (50)
A movable frame body (40) is suspended and supported so as to be freely movable up and down relative to the movable frame body (40), and a formwork lifting device m (
20) and the product pressing unit fixes the mounting N (30), and by operating the product pressing device (30) downward, the movable frame body (40) is pushed up repulsively, and the formwork lifting device (20) is pushed up.
) is brought into collision engagement with the engaged part (2a) of the formwork (2) from below, and the impact at this engagement is applied to the product (1).
Since it is used to separate the mold and formwork (2), the demolding operation can be carried out easily and smoothly.

Furthermore, in the invention according to claim 2, a formwork lifting device (20)
By horizontally moving the movable frame body (40) along the rails (5), the formwork (2) lifted up by can be efficiently fed to the next process.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a concrete secondary product demolding device according to an embodiment of the present invention, showing the state immediately before the formwork is pulled up. FIG. 2 is a front view showing the state of the demolding device after forming the mold. FIG. 3 is a schematic front view of a demolding device according to another embodiment of the present invention, and FIG. 4 is a schematic front view of a demolding device according to still another embodiment of the present invention. 1...Product, 2...Formwork, 2a...Engaged part, 3
... Template, 4... Face plate, 5... Base frame, 10...
- Support stand, 20... Formwork lifting device, 21... Fluid pressure cylinder, 22... Horizontal frame, 23... Horizontal pivot,
24...Fluid pressure cylinder, 25...Horizontal axis, 26
... Hanging arm, 27... Engaging portion, 28... Horizontal pivot, 30... Product pressing device, 31... Fluid pressure cylinder, 32... Movable member, 40... movable frame,
41... Roller, 42... Bearing stand, 50... Fixed frame, 51... Rail portion, 60... Fixed machine frame, 70
...Formwork transport means

Claims (1)

[Claims] 1. Support stand (1) of formwork (2) housing product (1)
0); a formwork lifting device (20) that engages with the formwork (2) and moves the formwork (2) upward; and a movable member (32) that lifts the product top surface (1a) or ); a movable frame body (40) to which the formwork lifting device (20) and the product pressing device (30) are fixed; It consists of a fixed frame (50) that suspends the movable frame (40), and there is a free movement space between the movable frame (40) and the fixed frame (50) that allows the movable frame (40) to move up and down. is set, the product pressing device (30) is pushed down and the movable frame (40) is rebounded upward within the range of the free movement margin, and the engaging portion (2) of the formwork lifting device (20) is moved upward.
7) is impact-engaged with the engaged portion (2a) of the formwork (2) from below, thereby separating the product (1) and the formwork (2). 2. The movable frame body (40) is also movable in the horizontal direction, and has a rail part (51) provided on one side of the movable frame body (40) and the fixed frame body (50), and a roller (41) provided on the other side. 2. The demolding device according to claim 1, wherein the free movement is set between 1 and 2. 3. The formwork lifting device (20) is inserted into the space below the formwork (2) pulled up by the formwork lifting device (20).
2. The demolding device according to claim 1, further comprising transport means (70) for receiving the mold (2) from the mold and transporting it to the next processing step. 4. Connect the upper end protruding plate part of the formwork (2) to the engaged part (2a)
The distal end claw of the hanging arm (26) that pivots around the horizontal axis (25) is the engaging part (27), and the movable member (32) of the product pressing device (30) is attached to the product surface (1a).
) or the engaging portion (2) when it comes into contact with the formwork (3).
7) and the engaged portion (2a), the gap (G3) is set to be smaller than the free movement margin.