JPS63243677A - Method and device for feeding article to be baked in roller hearth kiln - 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 Field of Industrial Application The present invention relates to a roller hearth kiln for firing square or rectangular objects such as tiles. The present invention relates to a method and apparatus for supplying products.

Problems to be Solved by the Prior Art and the Invention Roller hearth kilns have a large number of conveyor rollers that are simultaneously driven to rotate inside the furnace body, and square or rectangular coverings such as tiles are placed on the conveyor rollers. Firing is carried out while the fired product is loaded and transported from the entrance to the exit. For example, when firing square tiles, conventionally, the product is placed immediately to the side of the end of the transport roller on the entrance side. , a plurality of tile bases are arranged in a line with one side parallel to the above-mentioned conveyance direction, and the tile bases are fed onto the conveyance roller in that position by a suction cup, so that each tile base is conveyed with one side parallel to the conveyance direction. However, in order to ensure that the tile substrate does not fall between the rollers or change direction, the tile substrate must be conveyed over the top surface of at least three rollers. Therefore, in order to convey small tile substrates, it is necessary to reduce the diameter of the rollers and narrow the pitch.
If the rollers become thinner, especially in places exposed to high-temperature atmospheres exceeding 1,000 degrees Celsius, the rollers will bend under their own weight and the posture of the tile substrate will be disturbed.Furthermore, the number of rollers will increase, which will not only increase equipment costs, but also increase the number of rollers. There is a limit to the ability to reduce the diameter of the rollers because repairs are difficult, and small tile substrates cannot be transported.

Means for Solving the Problems The present invention has been completed in order to solve the above-mentioned problems, and the first aspect of the method for supplying products to be fired in a roller hearth kiln is to feed the products to be fired in the conveying direction. The structure is such that the second
The feeding device for the fired products in the roller hearth kiln of the invention is arranged so that the fired products are placed near the loading position of the fired products by extending the conveying roller on the inlet side of the furnace body out of the furnace, so that one side of the fired products is placed in the direction of conveyance. A carry-in position is set up where the product is carried in in a fixed posture, and between the carry-in position and the loading position, the product to be fired at the carry-in position is lifted up with a holder and placed in a position diagonal to the conveyance direction. The structure is equipped with a transfer device to lower the vehicle to its location.

Functions and Effects of the Invention According to the method of the present invention, a substantially rectangular to-be-fired product is cut and conveyed on the conveyance roller in an oblique position with respect to the conveyance direction, and the shape is longer than each side of the to-be-fired product. Since the diagonal line can be oriented in the conveying direction, it is possible to take a large distance in the conveying direction over the top surface of the conveying roller even for small-sized baked products. Compared to the case where a small-sized article to be fired is conveyed with one side parallel to the conveyance direction, even a small-sized article to be fired can be reliably conveyed by passing it over a large number of conveyor rollers. By placing it on the top, the curved end and rear end that are off the roller form a triangular shape, reducing weight, which suppresses sagging and reduces deformation when the product to be fired softens during firing. Furthermore, according to the device of the present invention, when the product to be baked is carried into the carry-in position with one side of the product in a constant posture with respect to the conveyance direction, the product to be baked is lifted by the holder of the transfer device. Since it is lowered to the mounting position in an oblique posture with respect to the conveyance direction, there is an effect that the above-described method of the invention can be carried out reliably.

EXAMPLE Hereinafter, an embodiment of the apparatus of the present invention will be explained based on the accompanying drawings, and an embodiment of the method of the present invention will be clarified by explanation of its operation.

The figure shows a roller hearth kiln in which a large number of conveyor rollers are arranged in parallel inside the furnace body, and the tile substrate is placed on top of the conveyor rollers. Showing the structure of the part that supplies the tile base,
Mounting frame I installed outside the inlet of the furnace body (not shown)
, a plurality of conveyance rollers 2 connected to the conveyance roller inside the furnace body.
are lined up and supported by bearings 3, and are connected in series with a drive chain (not shown) together with a conveyance roller inside the furnace so that they rotate together with the conveyance roller inside the furnace at a constant speed in one direction by the drive of a motor (not shown). The tile substrate λ is placed on the conveying roller 2 outside the furnace at the mounting position A, and two endless belts 6. An alignment conveyor 5 consisting of two endless belts 1 is laid in a direction perpendicular to the conveying direction of the conveying rollers 2, with its terminal end protruding to the side of the mounting frame l, and immediately thereafter two endless belts 1 are laid.
A carry-in conveyor 9 consisting of 0% 10 is continuously laid in the same direction, and a square tile base material a is carried across between both endless belts 10 of the carry-in conveyor 9, and at the terminal end of the endless belt IO. After hitting the movable stopper II that protrudes from the top surface from between and stopping a certain number of sheets,
By retracting the movable stopper It to the lower surface of the endless belt IO, it is transferred from the carry-in conveyor 9 onto the alignment conveyor 5, and is brought into contact with the fixed stopper 7 at the end.
On the alignment conveyor 5, a certain number of tile substrates 1 are arranged in close contact with each other in a constant posture with one side of each parallel to the conveyance direction of the conveyance roller 2. The number is iMB.

A transfer arm 14 for transferring tile substrates is attached to the tip of the arm mounting body 13 installed on the side of the mounting frame l so that the tip is located above the terminal end of the carrying-in conveyor 9.
The base end of the piston rod 17 is supported by the shaft 15 to freely swing on a horizontal plane, and the tip of the piston rod 17 of the air cylinder 16 attached to the arm mounting body 13 is connected to the transfer arm I4, By expanding and contracting, the transfer arm 14
is reciprocated between a position directly above the carry-in position B facing the same direction as the alignment conveyor 5 and a position above the loading position A where it assumes an oblique posture inclined at 45 degrees with respect to the transport direction of the transport roller 2. At the tip of the piston rod 20 of the air cylinder 19 attached downward to the transfer arm 14, the same number of suction cups 21 as the tile bases & to be aligned at the carry-in position B are attached. The suction boxes 22 are arranged in a line at intervals and are mounted facing downward, and connected to a negative pressure source through a flexible port (not shown).
3 is fitted into the guide tube 24 attached to the transfer arm 14, and the suction box 2 is moved by the expansion and contraction of the piston rod 20.
2 and the suction cup 21 move up and down a certain distance.

This embodiment has such a structure, and the tile substrates a are aligned and carried into the carrying position B, and the transfer arm 1 is moved by the extension of the piston rod 17 of the arm-driving air cylinder 16.
4 moves to just above the carry-in position B, the piston rod 20 of the air cylinder 19 for lifting and lowering the suction cups extends, and the suction cups 21 tilted to negative pressure are pressed against each tile base unit and the tile base λ is adsorbed. When the piston rod 20 contracts and is lifted, the air cylinder for driving the arm]
The piston rod 17 of 6 contracts and the transfer arm 14 moves to 4
After swinging 5 degrees to reach the upper part of the mounting position A, the suction cup 21 is lowered by the extension of the piston rod 20 for raising and lowering the suction cup, and the negative pressure of the suction cup 21 is released. is 45 with respect to the conveying direction of the conveying roller 2.
degree, each tile substrate a assumes an oblique posture with its diagonal line facing the transport direction, and is lowered onto the transport roller 2 at the loading position A. Subsequently, the suction cup 2I rises and the transfer arm 14 moves to the transporting position B. During the return movement, the next row of tile blanks a is aligned at carrying-in position B, and the tile blanks a, which were sucked and lifted by the suction cup 21 in the same way as above, are turned 45 degrees and placed at loading position A. When a detection device such as a phototube (not shown) installed at the placement position A detects that a row of tile blanks 1 that have been carried upwards and have been lowered previously have been carried forward by one row,
A row of tile substrates 1 that has been carried is lowered onto the conveyance roller 2, and by repeating this process, the slanted rows of tile substrates 1 are sequentially conveyed to the placement position A with the front and rear rows in close contact with each other. The tiles are placed on rollers 2, and each tile substrate & is placed on the conveying roller inside the furnace body while maintaining its oblique posture, and is conveyed inside the furnace toward the exit side.

In this way, in this example, the square tile base a is conveyed in an oblique position with its diagonal line facing the conveyance direction, so compared to the conventional case where one side of the square is conveyed in a position parallel to the conveyance direction. Then, even if it is a small tile base a with each side reduced to about 1.4, the conveyance roller 2
Since the distance in the conveyance direction across the top surface can be set equally, it is possible to convey smaller tile substrates, and by placing them on the conveyance roller 2 in an oblique position, it is possible to prevent them from coming off the conveyance roller 2. The curved end and back end are triangular and the weight is reduced, which reduces sag and deformation when softened during firing.
Furthermore, in this embodiment, since each tile base material λ is conveyed in a state in which the other tile base materials a closely surround it, the tile base materials 1 mutually restrain movement in the conveyance direction and the lateral direction. This has the advantage that the orientation of the tile base 1 is prevented from being disturbed due to vibration or the like during transportation.

In the above embodiment, the suction box 22 with the suction cup 2I attached to the lower surface is attached to the transfer arm 14 that swings on a horizontal plane about the shaft 15 so as to be raised and lowered by the expansion and contraction of the air cylinder 19. But instead of this, sucker 2I
The suction box 22 itself to which the suction box 22 is attached may be configured to swing on a horizontal plane about the shaft 15 and to move up and down along the shaft 15.

In addition, the suction box 22 is caused to perform reciprocating motion along the conveying direction of the conveying roller 2 between the carry-in position B and the mounting position A, and to move up and down, and the suction box 22 is lengthened in the middle of the reciprocating movement. It may be rotated 45 degrees around the center in the horizontal direction.

Further, as shown in FIG. 3, an alignment conveyor 5a for arranging the tile substrates λ is installed obliquely to the conveying direction of the conveying rollers 2, so that the tile substrates 1 are placed in an oblique position with respect to the conveying direction in advance. The suction box 22, which is lined up at carry-in position C and has suction cups 21 attached in a row on the bottom surface, is placed between carry-in position C and placement position A in an oblique position so that the 21 rows of suction cups are aligned with the 3 rows of tile substrates at carry-in position C. The conveying roller 2 may be made to perform reciprocating motion and vertical movement along the conveying direction, and the tile base lifted at the carry-in position C may be carried in the same posture and lowered onto the mounting position A.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the apparatus of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a plan view of another embodiment. a: Tile base A: Placement position B, C: Carrying-in position 2
: Conveyance roller 14: Transfer arm 16.19: Air cylinder 21: Suction cup 22: Suction box

Claims (1)

[Scope of Claims] 1. A large number of conveyor rollers arranged in parallel inside a furnace body, on which a substantially rectangular article to be fired, such as a tile, is placed and fired while the article is conveyed from an inlet to an outlet. In a hearth kiln, a method for supplying fired products, characterized in that the fired products are fed onto the conveyance rollers in an oblique position with respect to the conveyance direction. 2. On the conveyance rollers arranged in parallel inside the furnace body. In a roller hearth kiln, the conveying roller on the inlet side of the furnace body is extended to the outside of the furnace, and the roller hearth kiln is configured to carry out firing while conveying a generally rectangular article to be fired, such as a tile, from the inlet to the outlet. A carry-in position is installed in the vicinity of the placement position of the article to be fired, where the article to be fired is carried in with one side of the article in a constant attitude with respect to the transport direction, and between the carry-in position and the placement position, the Supply of products to be fired in a roller hearth kiln, characterized in that a transfer device is provided for lifting the products to be fired at the carry-in position with a holder and lowering them to the above-mentioned placement position in a posture oblique to the transport direction. Device