JPH0518097Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention circulates pallets in one direction using a conveyor, etc. During this time, architectural concrete blocks are molded on the pallets, cured and hardened, and the resulting product is This invention relates to an apparatus for manufacturing concrete blocks for construction, which extrudes concrete blocks and sends the empty pallets back to a molding machine.

(Prior Art) The apparatus shown in FIG. 4 is known as an apparatus for manufacturing concrete blocks for construction. In FIG. 4, reference numeral 1 denotes a molding machine for building concrete blocks, and a first conveyor 2 passing through the molding machine 1 in the direction of arrow a is provided.
The above-mentioned concrete block 4 is formed and placed on the pallet 3 that is transported by the concrete block 3. The concrete blocks 4 after molding are loaded together with the pallets 3 into a curing moving rack 7 on the rail 6 by a block loading machine 5 on the exit side of the first conveyor 2 (left end in the figure).
The concrete blocks 3 are transferred to a sealable tunnel-type curing chamber 8 and left for a predetermined period of time under the supply of steam. At the position where the rail 6 intersects the left end of the block, the block is transferred together with the pallet 3 onto the second conveyor 9 by the block take-out machine 10 and transported in the direction of arrow b, and then the product extrusion section 9a intersects with the second conveyor 9 in a T-shape. The pallet 3 is transferred by extrusion onto the third conveyor 11 in the direction of the arrow c, and the empty pallet 3 is transferred to the fourth conveyor 12 at the other end of the second conveyor 9 and transferred in the direction of the arrow d. , and is further transferred to the first conveyor 2 and supplied to the molding machine 1.

In addition, as a method of using the heat of hydration of concrete instead of using a steam-heated curing chamber 8, the pallet 3 on which the concrete blocks 4 of the molding machine are placed is transferred from the first conveyor 2 onto a large pallet, and then the concrete block 4 is placed on a large pallet. A known method is to place a large curing box over it.

(Problems to be solved by the invention) Since the device using the tunnel-type curing chamber transports the movable rack 7, seals it, and supplies steam to the inside, it requires a curing chamber that can be sealed.
Another problem was that a large amount of steam was consumed.
In addition, when covering with a curing box, a large pallet with a large number of small pallets 3 placed on it is placed and a large curing box is placed on top of it, so a crane is required to transport the large pallet. required.

This idea covers each pallet 3 with a small curing box at the exit of the molding machine 1 and circulates it, and after curing and hardening, removes the curing box and returns it to the exit of the molding machine 1. This eliminates the need for a crane.

(Means for Solving the Problems) A curing box transfer device 20 (see FIG. 1) that spans the first conveyor 2 and second conveyor 9 is installed to the left of the molding machine 1 and the third conveyor 11 in FIG. establish.

In FIG. 1, the first conveyor 2 is a conveyor that passes through the above-mentioned molding machine 1, and on the pallet 3 on this first conveyor 2, concrete blocks 4 immediately after being molded by the molding machine 1 are placed. ing. The second conveyor 9 is for transporting the product concrete blocks 4 on the pallet 3, and the product concrete blocks 4 are extruded from the pallet 3 at the product extrusion section 9a.
Further, 21 is a curing box, which is made in a size that can be placed on the pallet 3 to cover the concrete blocks 4 on the pallet 3. In this invention, the rear part of the molding machine of the first conveyor 2 and the extrusion part for pushing out the product concrete blocks from the pallet 3 of the second conveyor 9 which places the product concrete blocks 4 on the pallet 3 and transfers them. Concrete blocks 4 on the pallet 3 are placed above the front part 9a.
A plurality of curing boxes 21 that can be placed on the pallet 3 while covering all of the curing boxes 21 are lined up in a row and can be sent intermittently from the second conveyor 9 side to the first conveyor 2 side. storage conveyor 22
A first conveyor 2 of this storage conveyor 22 is provided.
Openings through which the curing box 21 can pass vertically are formed at the side end portion and the second conveyor 9 side end portion, respectively, so as to be openable and closable. In between, a first transfer device 30 is provided for taking out the curing box 21 on the storage conveyor 22 downward from the opening and transferring it to the pallet 3 on the rear part of the molding machine on the first conveyor 2. A curing box 21 is placed from the pallet 3 on the front part of the extrusion section 9a of the second conveyor 9 between the side end of the second conveyor 9 and the second conveyor 9 below.
A second transfer device 40 is provided for holding, lifting and transferring the container onto the storage conveyor 22 through the above-mentioned opening.

(Function) The curing box 21 on the storage conveyor 22 is placed on the pallet 3 immediately after leaving the molding machine 1 by the first transfer device 30, and the concrete block 4 immediately after molding on the pallet 3 is placed in the curing box. 21. The concrete blocks 4 transferred together with the pallet 3 are cured and hardened into products during transfer, and are transferred by the second conveyor 9, and when they reach the front of the product extrusion section 9a, the curing box 21 is The product concrete blocks 4 are then transferred to the storage conveyor 22 by the second transfer device 40, and then the product concrete blocks 4 are extruded from the pallet 3, and the empty pallet 3 is supplied to the molding machine 1 in the conventional manner.

Thus, the second conveyor 9 is transferred to the second transfer device 4
The curing box 21 picked up at step 0 is lifted upward and transferred onto the storage conveyor 22 through an opening at the end of the storage conveyor 22 on the second conveyor 9 side. After the opening is closed, the curing box 21 is sent to the end of the first conveyor 2 side. After the opening at the end of the first conveyor 2 side is opened, the curing box 21 is transferred to the first conveyor 2 side by the first transfer device 30.
The goods are then transferred onto a pallet 3 on a conveyor 2.

(Example) In FIG. 1, the first conveyor 2 has a large number of short rollers 2b, 2b rotatably mounted on a pair of left and right side frames 2a, 2a, and a flat plate-shaped pallet 3 placed thereon. and side frame 2a
Both left and right ends of the pallet 3 are guided by a guide plate 2c fixed to the pallet 3. Similarly, the second conveyor 9 also includes a pair of left and right side frames 9a, 9a, short rollers 9b, 9b, and guide plates 9c, 9c. The first conveyor 2 and the second conveyor 9 are provided in parallel as shown in FIG. 4, and the curing box transfer device 20
is the first conveyor 2 and the second conveyor 9 described above.
It is provided to straddle the area at right angles.

A curing box 2 transferred by this curing box transfer device 20
1 is formed in the shape of a rectangular parallelepiped that covers all of the concrete blocks 4 on the pallet 3, and is provided with low-height cylindrical protrusions 21a on both left and right side plates (see Fig. 3). The tip of the rod can be inserted into 21a from both sides and lifted by hooking it.

The storage conveyor 22 of the curing box transfer device 20 has long rollers 23 arranged above the middle between the first conveyor 2 and the second conveyor 9, and two rows of left and right above the first conveyor 2 and the second conveyor 9, respectively. It consists of an array of short rollers 24 (see FIGS. 2 and 3), and a sprocket 2 above these
An endless chain 25 for feeding is wound around 5a, 25a and rotated by driving in the direction of arrow e, and a dog 25c fixed to the endless chain 25 is connected to the storage conveyor 2.
2 and pushes the curing box 21 from above the second conveyor 9 to above the first conveyor 2.

The short rollers 24 at both ends of the storage conveyor 22 are
As shown in FIG. 2, at equal intervals on the support bar 26,
The support bar 26 is attached in a cantilevered manner, and support shafts 26a extending from both ends of the support bar 26 are rotatably supported.A piston rod 28 of an air cylinder (see FIG. 3) is attached to one support shaft 26a via an arm 27. ) are connected, and as the piston rod 28 rises and falls, the arm 27 rotates approximately 90 degrees vertically, and when the piston rod 28 descends, the roller 24 is held in a horizontal position, and the curing box 21 is connected to the rollers 2 on both sides.
When the piston rod 28 rises, the roller 24 rotates downward, and openings are formed at both ends of the storage conveyor 22 to allow the curing box 21 to pass through.

The first transfer device 30 (see FIG. 1) for placing the curing box 21 on the storage conveyor 22 onto the pallet 3 on the first conveyor 2 has a rotation mechanism for the short rollers 24 described above and a rotation mechanism for the first conveyor 2. It is composed of a first air cylinder 31 and a second air cylinder 32, which are provided in two stages, upper and lower, on the left and right sides of the air cylinder, respectively. The first air cylinder 31 has its piston rod 31
The tip of a is formed to have a thickness that fits into the hole of the cylindrical projection 21a of the curing box 21, and when it is projected, it fits into the hole of the cylindrical projection 21a and holds the curing box 21 suspended. . Further, the second air cylinder 32 is
The tip of the piston rod 32a has a fork portion that hooks on the lower edge of the curing box 21, and supports the curing box 21 on it when it is projected. When the two curing boxes 21 are stacked on top and bottom of the piston rod (fork) 32a of the second air cylinder 32 as shown in the figure, the height of the cylindrical protrusion 21a of the upper curing box 21 is is adapted to match the height of the piston rod 31a of the first air cylinder 31, and as the piston rod 31a of the first air cylinder 31 protrudes, the piston rod 31a is raised to the cylindrical protrusion 21a of the upper curing box 21.
Fits in. Therefore, when the piston rod 32a of the second air cylinder 32 is retracted in this state, the lower curing box 21 falls onto the pallet 3 of the first conveyor 2 below, and then the short roller 24 is rotated downward. storage conveyor 22
The end of the curing box 21 on the short roller 24 at this end falls onto the curing box 21 supported by the first air cylinder 31, and further the piston rod (fork) 32a of the second air cylinder 32 is released. After protruding, by retracting the piston rod 31a of the first air cylinder 31, the two upper and lower curing boxes 21 supported by the first air cylinder 31 fall onto the piston rod (fork) 32a of the second air cylinder 32. During this time, the short roller 24 is returned to the horizontal position and the storage conveyor 2
The opening at the end of 2 is closed and this short roller 24
A curing box 21 is sent to the top from the second conveyor 9 side,
By repeating this process, the curing boxes 21 on the storage conveyor 22 are transferred one by one onto the pallet 3 on the first conveyor 2, and placed over the concrete blocks 4 that have just been molded by the molding machine 1.

On the other hand, a second conveyor 9 is used to transfer the curing boxes 21 from the pallet 3 on the second conveyor 9 to the storage conveyor 22.
The transfer device 40 includes a rotation mechanism of short rollers 24 similar to the first transfer device 30, a pair of right and left third air cylinders 41 erected outside the side frame 9a of the second conveyor 9, and this third air cylinder 41. 3 air cylinder 41
The fourth air cylinder 42 is fixed to the tip of the piston rod 41a. The third air cylinder 41 is for raising and lowering the fourth air cylinder 42, and when the piston rod 41a thereof is retracted, the fourth air cylinder 42 is lowered to move the piston rod 42a of the fourth air cylinder 42.
The height matches the height of the cylindrical protrusion 21a of the curing box 21 on the pallet 3 of the second conveyor 9, and the protrusion of the piston rod 42a of the fourth air cylinder 42 causes the cylindrical protrusion 21a of the piston rod 42a to
Fits in. Then, after rotating the upper short roller 24 downward to open the opening at the end of the storage conveyor 22 on the second conveyor 9 side, the piston rod 41a of the third air cylinder 41 is made to protrude.
The curing box 21 held by the piston rod 42a of the fourth air cylinder 42 rises, passes between two rows of short rollers 24 arranged above, reaches the top of this roller 24, and then brings the short rollers 24 to a horizontal position. Return the above opening and close the fourth air cylinder 42.
By retracting the piston rod 42a,
The curing box 21 is placed on the short roller 24, that is, on the storage conveyor 22, and the piston rod 41a of the third air cylinder 41 is retracted, so that the fourth air cylinder 42 returns to its original position. By repeating this process, the curing boxes 21 after curing are removed one by one from the pallet 3 on the second conveyor 9 and transferred onto the storage conveyor 22.

In the above embodiment, two cylindrical protrusions 21a of the curing box 21 may be provided symmetrically on the left and right sides in FIG. By arranging them one by one, the posture of the curing box 21 when going up and down can be stabilized. Additionally, curing boxes 21 are provided above the first conveyor 2 and the second conveyor 9, respectively.
A lifting guide may be provided. Furthermore, endless chains 25 are provided above the storage conveyor 22 on both the left and right sides, air cylinders are provided facing downward above the short rollers 24 at both ends, and a magnet is fixed to the tip of the piston rod, and a magnet is attached to the top surface of all the curing boxes. An iron piece is fixed in advance, and a curing box can be attached to the tip of the piston rod to move it up and down. Furthermore, a vacuum suction device may be provided at the tip of the piston rod instead of the magnet.

(Effect of the invention) This invention provides a storage conveyor that connects the molding machine exit side of the first conveyor and the extrusion section entrance side of the second conveyor, and stores the curing boxes removed from the pallet at the extrusion section entrance side on the molding machine exit side. Since the concrete block is transferred onto a pallet at a temperature of 100 degrees, the concrete block after molding can be cured and hardened by utilizing the heat of hydration, and a steam-heating type curing chamber is not required. Since each pallet transferred by the conveyor is covered with a small curing box, it is easy to automate and does not require transportation by a crane. 1
Openings through which the curing box can pass are formed at the end of the conveyor side and the end of the second conveyor so that the curing box can be moved up and down the storage conveyor through these openings. The second transfer device only needs to move the curing box in the vertical direction, which simplifies the mechanism and reduces the installation area.

[Brief explanation of the drawing]

Fig. 1 is a front view of the embodiment of this invention, Fig. 2 is a plan view of the left end of the storage conveyor shown in Fig. 1, Fig. 3 is a left side view of Fig. 2, and Fig. 4 is a plan view of the conventional device. It is a diagram. 1... Molding machine, 2... First conveyor, 3... Pallet, 4... Concrete block, 9... Second conveyor, 9a... Product extrusion section, 21... Curing box, 22... Storage conveyor, 23...Long conveyor roller, 24...Short conveyor roller, 25
... Endless chain, 25c ... Dog, 30 ... First transfer device, 31, 32 ... Air cylinder, 40
...Second transfer device, 41, 42...Air cylinder.

Claims (1)

[Scope of utility model registration request] A large number of pallets on which a plurality of architectural concrete blocks can be placed are circulated in one direction, the concrete blocks are molded on the pallets by a molding machine, and the molded concrete blocks are cured and hardened. In the concrete block manufacturing apparatus, the concrete block manufacturing apparatus extrudes product concrete blocks from a circulating pallet and returns the empty pallets to the molding machine, the molding machine having a first conveyor installed to pass through the molding machine. The rear part and the front part of the extrusion section for pushing out the product concrete blocks from the pallet of the second conveyor, which places the product concrete blocks on the pallet and transfers them, A storage conveyor is provided that can intermittently transport a plurality of curing boxes that can be covered and placed on a pallet in a row from the second conveyor side to the first conveyor side;
Openings through which the curing box can pass vertically are formed at the first conveyor side end and the second conveyor side end of the storage conveyor, respectively, so that the first conveyor side end of the storage conveyor and the first conveyor A first transfer device for taking out the curing box on the storage conveyor downward from the opening and transferring it to a pallet on the rear part of the molding machine of the first conveyor is provided between the storage conveyor and the second conveyor side end of the storage conveyor. part and lower second
A concrete block manufacturing apparatus characterized in that a second transfer device is provided between the conveyor and the second conveyor for lifting the curing box from the pallet on the front part of the extrusion part of the second conveyor and transferring it onto the storage conveyor through the above-mentioned opening. .