JPH0313043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a demolding device used to separate and take out secondary concrete products such as machi blocks from molding forms.

[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. raise the
There is one in which the product is 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 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. later,
The product often separated from the formwork and fell onto the support stand. 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

Furthermore, since it is difficult to check for cracks inside the product, the product is allowed to be used as is as a component of a concrete structure, resulting in a dangerous situation in which the strength of the concrete structure decreases. In order to prevent the product from being lifted while still attached to the formwork, it is best to lengthen the vibration application time before lifting the formwork so that the formwork and product are completely separated on the support table. Such a vibration process actually encouraged the occurrence of cracks.

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 with 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. With this conventional device, the product is held stationary on the support stand throughout the entire movement process of the formwork, so there is no lifting or falling of the product, and vibration is applied to promote separation of the formwork and 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. It is something to do.

A further object of the present invention is to remove the mold from the product without damaging the product or causing cracks, and to immediately transport the formwork separated from the product to the next process in a suspended state. The purpose of this invention is to provide a molding device.

[Means for Solving the Problems] The demolding device for secondary concrete products of the present invention will be explained below using reference numerals in the attached drawings.
A support stand 10 for the formwork 2 that houses the product 1; a formwork lifting device 20 that engages with the formwork 2 and moves the formwork 2 upward; and a movable member 32 that is connected to the product top surface 1a or the product top surface 1a. a product pressing device 30 that abuts against the template 3 adhered to; a movable frame body 40 to which the mold lifting device 20 and the product pressing device 30 are fixed;
and; a fixed frame body 50 that suspends the movable frame body 40, and a margin of movement 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 a product pressing device is provided. 30 is pushed down to drive the movable frame body 40.
is moved upwardly within the range of the free movement margin, and the engaging portion 27 of the formwork lifting device 20 is moved upwardly within the range of the free movement margin, so that 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 contact with each other from below.

[Function] The formwork 2 housing 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 transportation to the curing yard, is supported. It is transported to a location on the stand 10 and stopped and held at a predetermined position by appropriate means. Support stand 10
The formwork lifting device 20 that was waiting in the upper space is driven downward toward the formwork 2, and the engaging portion 27 of the formwork lifting device 30 is placed below the engaged portion 2a of the formwork 2. be done. Further, the product pressing device 30 is driven, and its movable member 32 is pressed against the top surface 1a of the product. Thereafter, when the product pressing device is driven downward and the movable member 32 presses the product 1 against the support base 10, the movable frame 40 is driven upward by the reaction of this pressing operation.

In order to allow the movable frame 40 to move up and down, a free movement margin is set between the fixed frame 50 and the movable frame 40. Since the gap _G3 between
collides with the engaged portion 2a from below, and the product 1 and the formwork 2 are separated by this impact. After separating the formwork 2 and the product, the movable member 3 of the product pressing device 30
2 is preferably stopped and held in that position, and when the formwork 2 is further pulled up by the drive of the formwork lifting device 20, the product 1 is held stationary in its initial position on the support base 10.

Incidentally, at this stage, the product 1 and the formwork 2 have already been separated, so the movable member 31 of the product pressing device may be moved upward together with the formwork lifting device 20, or the movable member 31 of the product pressing device may be moved upward from the formwork. Pulling device 20
It can also be moved up in advance of the . 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 block, and a plurality of formworks 2 are installed in parallel on the base frame 5, and the front part of the product 1 is formed. A face plate 4 for use is fixed to the base frame 5. This base frame 5 is conveyed along the rail portion 11 of the support base 10 by the intervention of suitable roller means. In this example, the movable member 32 of the product pressing device 30
is directly abutted against the upper surface 1a of the butt end of the machi block product 1, but in the case of the centrifugally molded or press molded product 1 as shown in FIG.
It abuts against a template 3 inserted into the butt end of the formwork 2. In addition, even in the case of a cast molded product, a contact plate similar to the mold plate 3 can be inserted between the movable member 32 and the product top surface 1a so that no pressure marks are left due to local pressure on the top surface 1a of the product. .

The formwork lifting device 20 includes a pair of hydraulic cylinders 21 fixed vertically to a movable frame body 40, a horizontal frame 22 fixed to the lower end of a piston rod of the hydraulic cylinders 21, and left and right ends of the horizontal frame 22. A pair of fluid pressure cylinders 24 are connected to each other by a horizontal pivot 23, and are supported by a horizontal pivot 28 at the end of the horizontal frame 22, and the upper end is connected to the tip of the piston rod of the fluid pressure cylinder 24 by a horizontal pivot 25. It consists of a pair of connected left and right hanging arms 26, and a claw part 27 is provided inwardly protruding from the lower end of the lifting arm 26.

The horizontal frame 22 moves up and down by the operation of the fluid pressure cylinder 21, and the suspension arm 26 swings and rotates about the horizontal pivot 28 by the operation of the fluid pressure cylinder 24. When the horizontal frame 22 is lowered, the pair of left and right hanging arms 26 are in a standby state that opens outward, and after the horizontal frame 22 has been lowered to a predetermined position, each hanging arm 26 rotates inward. The tip portion 27 is located directly below the extending plate portion 2a of the formwork 2.

In order to release the portion of the formwork 2 that is tapered inversely with respect to the demolding direction, its side component pieces 2b are rotatable outward about the horizontal pivot 2c. The stopper means for fixing the side component 2b to the mold body is released by manual or automatic operation prior to the demolding operation.

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

In this embodiment, the movable frame 40 is also movable in the horizontal direction, and a horizontal shaft 45 is attached to the inner surface of the upright walls 43 and 44 of the U-shaped bearing stand 42 fixed to the upper surface of the left and right ends. A pair of rollers 41 are attached thereto. Horizontal fixed frame 50 with H-shaped cross section
is fixed to the fixed frame 60, and the fixed frame 5
The pair of rollers 41 are mounted on the left and right rail portions 51 of 0.
are fitted.

Upper horizontal wall portion 52 of rail portion 51 and roller 41
The distance G ₁ between the upper surface and the upper surface is larger than the distance G ₂ between the lower horizontal wall portion 53 of the rail portion 51 and the bottom wall plate portion 46 of the bearing stand 42, and the difference between the distance G ₁ and the distance G ₂ is the margin for vertical movement of the movable frame 40. Incidentally, as shown in FIG. 3, contrary to this example, the rail portion 47 may be provided on the side of the movable frame 40 and the roller 54 may be provided on the side of the fixed frame 50.

In another embodiment shown in FIG. 4, a formwork transfer means 70 is inserted into the space below the formwork 2 pulled up by the formwork lifting device 20 by linear sliding or turning movement. . When the formwork lifting device 20 is operated to disengage the engaging portion 27 from the engaged portion 2a of the formwork 2 and open the formwork 2, the formwork 2 is placed on the formwork transfer means 70, The mold is transferred to the next process such as cleaning the mold by the linear movement or rotational movement of the mold transfer means 70.

[Effect of the invention] As described above, in the demolding device of the present invention, the movable frame 40 can be moved vertically relative to the fixed frame 50.
The mold lifting device 20 and the product pressing device 30 are fixed to the movable frame 40, and the product pressing device 30 is operated downward to push up the movable frame 40 repulsively. , the engaging portion 27 of the formwork lifting device 20 is brought into collision engagement with the engaged portion 2a of the formwork 2 from below, and the impact upon this engagement is applied to the product 1.
Since it is used to separate the formwork 2 from the mold 2, the demolding operation can be carried out easily and smoothly.

Furthermore, in the invention according to claim 2, the formwork 2 lifted by the formwork lifting device 20 is moved by the rail portion 5.
By horizontally moving the movable frame body 40 along the line 1, the mold can be immediately and efficiently transported to the next process such as mold cleaning without the need for a separate conveying means.

[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 the mold is pulled up. 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. DESCRIPTION OF SYMBOLS 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 pivot, 26...Hanging arm, 27
...Engaging portion, 28...Horizontal pivot, 30...Product pressing device, 31...Fluid pressure cylinder, 32...Movable member, 4
0...Movable frame body, 41...Roller, 42...Bearing stand, 5
0... Fixed frame body, 51... Rail portion, 60... Fixed machine frame, 70... Formwork transfer means.

Claims (1)

[Claims] 1. Support stand 10 for formwork 2 housing product 1
; a formwork lifting device 20 that engages with the formwork 2 and moves the formwork 2 upward; and a product pressing device in which the movable member 32 abuts against the product top surface 1a or the template 3 attached to the product top surface 1a. 30; a movable frame body 40 to which the formwork lifting device 20 and the product pressing device 30 are fixed; and a fixed frame body 50 that suspends the movable frame body 40.
A margin of movement is set between the movable frame 40 and the fixed frame 50 to allow the movable frame 40 to move up and down, and the product pressing device 30 is pushed down and driven to move the movable frame 40 within the margin of movement. Move the repulsion upward within the range of
A demolding device for a secondary concrete product, in which the engaging portion 27 of the formwork lifting device 20 is brought into collision engagement with the engaged portion 2a of the formwork 2 from below, thereby separating the product 1 and the formwork 2. 2. The movable frame 40 is also movable in the horizontal direction,
2. The demolding device according to claim 1, wherein the free movement is set between a rail portion 51 provided on one of the movable frame body 40 and the fixed frame body 50 and a roller 41 provided on the other side. 3 It is inserted into the space below the formwork 2 pulled up by the formwork lifting device 20, and the formwork lifting device 20
2. The demolding apparatus according to claim 1, further comprising a transfer means 70 for receiving the formwork 2 from the mold and transferring it to the next processing step. 4 The upper end overhanging plate portion of the formwork 2 is the engaged portion 2a, the tip claw portion of the hanging arm 26 that pivots around the horizontal pivot 25 is the engaging portion 27, and the movable member of the product pressing device 30 is 2. The demolding device according to claim 1, wherein a gap G3 between the engaging portion 27 and the engaged portion 2a when the engaging portion 32 comes into contact with the product surface 1a or the mold ₃ is set to be smaller than the free movement margin.