JP3393350B2 - Automatic transfer equipment for processed products in tunnel furnaces - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically transferring a processed product of a tunnel furnace for continuously firing while transferring the processed product. 2. Description of the Related Art In a tunnel furnace automatic transfer apparatus for continuously firing while transferring a processing product, as shown in FIG. A return transport path 5 for raising and lowering the processed product 1 is provided, and a closed loop transport path connected by two transverse transport paths 4a and 4b connecting the in-furnace transport path 3 and the return transport path 5 is provided. It is normal to operate automatically. Examples of the processing product transfer method in the in-furnace transfer path 3 include a pusher pushing method, a roller transfer method, a conveyor chain method, a mesh belt method, and the like. There are a transport system and a conveyor chain system. In any of the above-described processing product transport methods, the operation of transporting the foremost processing product to the orthogonal transport path or transferring the product to another transport device at the front end of the processing path in the processing product advance direction ends. In the meantime, in order to prevent the following processed product from reaching the front end of the transport path, the processing product located at the forefront of the transport path is separated from the subsequent processed product and located at the forefront. If it is necessary to carry out the transfer operation or the transfer operation of the product, and if the time required for the transfer operation or the transfer operation is long, the separation distance between the foremost processed product and the subsequent processed product is long, In general, the transport system at the front end of the processing product in the forward direction of the path is a roller transport system. In the prior art, as the structure of the front end of the conveyance path in the processing product advance direction, as shown in FIG. 5, the front end of the conveyance path includes a conveyance roller 6 that conveys the processing product 1a at the forefront and a flat plate. In addition to providing the processed product stopper 26, the processed product detector 18 detects that the processed product 1a has arrived at the front end, and stops driving the transport roller 6. However, the processed product 1a conveyed on the conveying roller 6 while being inclined obliquely in a plane has a variation in the detection timing of the processed product 1a by the processed product detector 18 because the processed product 1a is inclined. When the conveyance of the product 1a is stopped, the processed product 1a may be in a tilted state. When the processed product is stopped in a tilted state and subsequently transferred to an orthogonal transfer path or transferred to another transfer device, there is a drawback that handling by an automated device may be difficult. [0003] In the above-mentioned prior art, when the processing product 1a located at the forefront to the front end of the processing product 1 on the transport path in the forward direction is transported by the transport roller 6, the processing product 1a 1a is obliquely inclined in a plane, and there is a problem that handling by an automatic device thereafter may be difficult. An object of the present invention is to solve the above-mentioned problems and to provide a highly-reliable processing-product inclination correcting apparatus that reliably sets the inclination of the processing product 1 to zero. SUMMARY OF THE INVENTION [0004] An apparatus for automatically transferring a processed product of a tunnel furnace according to the present invention includes: a furnace transfer path for transferring a processed product or a processed product placed on a base plate in the tunnel furnace; A closed loop transport path is constituted by a return transport path juxtaposed to the in-furnace transport path, and two transverse transport paths that connect these transport paths orthogonal to the in-furnace transport path and the return transport path. A transfer roller for transferring a processed product and a number of rotations orthogonal to the transfer roller at a position where the in-furnace transfer path or return transfer path and the transverse transfer path are orthogonal to each other in an automatic transfer device for a processed product in a tunnel furnace. Possible tilt correcting rollers are provided, and the plurality of tilt correcting rollers are arranged at small intervals such that the corners of the processed product do not enter the gap between the correcting rollers, and are connected to the tilt correcting rollers at the front end of the processed product. And a timer means for driving the transport roller for a certain period of time after detecting the arrival of the processed product at the front-end inclination correcting roller, and processing the transport roller. The product is transported at a speed higher than the transport speed in each of the transport paths and arrives at the inclination correction roller, and after detecting the arrival of the processed product at the inclination correction roller, the transport roller is driven for a certain period of time to drive the processed product. It is characterized by eliminating inclination. The present invention will be described with reference to the drawings. FIG. 1 is an embodiment of the present invention, and is a view for explaining a structure of a front end portion in a forward direction of a processed product 1 on an in-furnace transfer route 3 as an example of a front end portion of a transfer route. The main components are a transport roller 6 for transporting the processed product 1 in the forward direction of the in-furnace transport path 3, a tilt correcting roller 7 rotatably mounted on a frame 9 with a tilt correcting roller shaft 8, and a processed product detector 18. It is configured. In FIG. 1, the processing product 1a at the forefront of the in-furnace transport path 3 is separated from the processing product 1b by being transported by the transport rollers 6 at a transport speed higher than the transport speed of the in-furnace transport path 3, and is oblique. This shows a state in which one corner of the front end of the processed product 1a which has been conveyed while being inclined has arrived at the inclination correcting roller 7a. When the processed product 1a is further conveyed, the processed product 1a is conveyed rightward in the figure, and one corner of the front end of the processed product 1a, that is, the lower corner in the figure hits the inclination correcting roller 7a, so that it cannot be advanced. Therefore, a conveying force rotating counterclockwise acts on the processed product 1a, and a clockwise rotating force acts on the inclination correcting roller 7a as a reaction. Here, since the inclination correcting roller 7 is configured to freely rotate around the inclination correcting roller shaft 8, the resistance of the processed product 1a in the counterclockwise rotation operation is very small, and the processed product 1a Of the processing product 1a can be corrected very easily. Further, in the present invention, after the arrival of the processed product 1a at the front end of the in-furnace transfer path 3 is detected by the processed product detector 18, the inclination of the processed product 1a obtained by experiment is corrected by timer means (not shown). Since the driving of the transport roller 6 is continued for a certain period of time to ensure the inclination, the inclination of the processed product 1a can be reliably reduced to zero. In the present embodiment, the inclination of the processed product 1 has been described with reference to the inclination in which the upper corner illustrated in FIG. 1 is forward, but the inclination in the opposite direction to the inclination in FIG. The same applies to the forward slope. An embodiment of the present invention will be described below.
FIG. 4 is an example schematically showing an apparatus for automatically loading and unloading the processed product 1 into and out of the tunnel furnace 2, in which the processed product 1 circulates clockwise. The treated product 1 carried into the furnace is baked while being conveyed inside the furnace by the furnace transfer path 3, and is then carried out of the furnace.
Are transferred to a horizontal transport path 4a orthogonal to the horizontal transport path 4a, and further transferred to a return transport path 5 orthogonal to the horizontal transport path 4a. In the return transport path 5, the fired processed product 1 is collected, the unfired processed product 1 is supplied, and the transverse transport path 4b
Are sequentially transferred from the horizontal transport path 4b to the furnace transport path 3
It is transferred to and circulated. The present invention is applied to any of the in-furnace transport path 3, the lateral transport paths 4a and 4b, and the return transport path 5, but the present invention will be described in the in-furnace transport path 3. FIG. 1 is a view for explaining the structure of the front end portion of the in-furnace transfer path 3 in the forward direction of the processed article 1 in FIG. 4, and FIG. 2 is a view showing a cross section AA in FIG. The power is transmitted from the rotation drive unit 16 to the transport roller shaft 12a by the sprockets 17a and 17b and the chain 10a, and the power is transmitted to the respective transport roller shafts 12 by the sprocket 15 and the chain 10b. The transport roller 6 integrally mounted on the transport roller shaft 12 supported by the transport roller bearing 11 is rotated to transport the processed product 1. Further, a large number of inclination correcting rollers 7 that are freely rotatable around a large number of inclination correcting roller shafts 8 are mounted on the frame 9 and the processed article 1 is detected by a photoelectrically processed article detector 18. ing. Processed product 1
After stopping, the table 19 is lowered by the lifting drive unit 20 shown in FIG. 2 and the processed product 1a is placed on the conveyor chain 21, and then the conveyor chain 21 is driven by the drive unit (not shown).
Is driven to transport the processed product 1a in the direction of the return transport path 5. In FIG. 1, the in-furnace transfer path 3
Is transported at a transport speed higher than the transport speed of the in-furnace transport path 3 by the transport rollers 6 to be separated from the next processed product 1b and transported obliquely. One of the corners at the front end of the processed product 1a has reached the inclination correcting roller 7a. When the processed product 1a is further conveyed, the processed product 1a is conveyed rightward in the figure, and one corner of the front end of the processed product 1a, that is, the upper corner in the figure hits the inclination correcting roller 7a and cannot be advanced. Therefore, a conveying force rotating in the counterclockwise direction acts on the processed product 1a, and a clockwise rotating force acts on the inclination correcting roller 7a as a reaction. Here the inclination correction roller 7
Is designed to rotate freely around the inclination correction roller shaft 8, so that the resistance of the processing product 1a in the counterclockwise rotation operation is very small, and the processing product 1a is rotated counterclockwise. 1, the inclination of the processed product 1a could be corrected very easily as shown by the two-dot chain line in FIG. Further, the inclination correcting rollers 7 have a small diameter and a small mounting pitch interval, and are arranged in large numbers to prevent the corners of the processed product 1a from being stuck between the tilt correcting rollers, and to transfer the processed product 1a in the furnace. 3
After the arrival at the front end of the processing roller 1 is detected by the processed product detector 18, timer rollers (not shown) are used for a certain period of time determined by an experiment to ensure that the tilt of the processed product 1 a is also corrected for various tilts. Is continued, so that the inclination can be reliably reduced to zero with respect to the inclination angle in the transport path of the normal tunnel furnace. FIG. 3 shows another embodiment in which the method of mounting the inclination correcting roller 7 and the means for detecting the processed product 1 are different from those of the above-described embodiment.
Arm 22 rotating about a pin 23 fixed to 6 as a fulcrum
A number of tilt correcting rollers 7 rotatably mounted on the arm 22 with a number of tilt correcting roller shafts 8;
It comprises a stopper 24 for restricting further rotation when a certain angle is rotated, and a detector 25 for detecting when the arm 22 is rotated for a certain angle with the transfer of the processed product 1a. It is an example. In the present embodiment, the inclination of the processed product 1a has been described with respect to the inclination in which the upper corner illustrated in FIG. 1 is forward, but the inclination in the opposite direction to the inclination in FIG. The same effect was obtained for the forward slope. As described above, according to the present invention, the front end in the forward direction of the processed product on the transport path is constituted by a transport roller, a plurality of inclination correcting rollers, and a processed product detector. Even after detecting the arrival of the processed product at the front end of the transport path, the tilt of the processed product is reliably reduced to zero by driving the transport rollers for a certain period of time using the timer means, thereby ensuring a highly reliable processed product. A tilt correction device is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating an embodiment of the present invention. FIG. 2 is a diagram showing a cross section AA in FIG. FIG. 3 is another embodiment of the present invention. FIG. 4 is a diagram illustrating an automatic transfer device for processed products in a tunnel furnace. FIG. 5 is a diagram illustrating a conventional technique. [Description of Signs] 1, 1a, 1b Processed product 2 Tunnel furnace 3 In-furnace transport path 6 Transport roller 7, 7a Tilt correction roller 8 Tilt correction roller shaft 18 Processed product detector 22 Arm 23 Pin 24 Stopper 25 Detector 26 Frame 27 Processed product stopper

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 47/22-47/32 B65G 43/00-43/10 B65G 47/53-47/54 B65G 47 / 88 F27B 9/24

Claims (1)

(57) [Claims] [Claim 1] An in-furnace transfer path for transferring a processed product or a processed product mounted on a base plate (hereinafter referred to as a processed product) in a tunnel furnace, and a transfer in the furnace. A tunnel furnace comprising a closed loop-shaped transport path composed of a return transport path juxtaposed to a path, and two transverse transport paths that connect these transport paths orthogonally to the in-furnace transport path and the return transport path. In an automatic processing device for transporting processed products, a transport roller for transporting a processed product and a number of rotatable inclination corrections perpendicular to the transport roller are provided at a location where an in-furnace transport route or a return transport route is orthogonal to a horizontal transport route. A roller is provided, and the plurality of inclination correcting rollers are arranged at such a small interval that corners of the processed product do not enter the gap between the correcting rollers, and a process for detecting arrival of the processed product to the tilt correcting roller. Product detector ,
A timer is provided for driving the transport roller for a certain period of time even after detecting the arrival of the processed product on the inclination correcting roller, and the processed product is transported by the transport roller at a speed higher than the transport speed in each of the transport paths. The transport roller is driven for a certain period of time even after the arrival of the processed product at the inclination correcting roller and the arrival of the processed product at the tilt correcting roller is detected, thereby eliminating the tilt of the processed product. .