JPS636319B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous drying and baking device for coated welding rods, and more specifically, it is capable of efficiently drying and baking a large amount of welding rods after being coated with a coating material, as well as transporting a welding rod loading frame. This relates to a continuous drying/calcination device that can rationally perform the following steps.

When manufacturing coated welding rods, after coating the desired coating material around the core wire using a coating device, this coating material is dried (depending on the brand of the welding rod, it may be fired, but hereafter referred to as drying). In this case, it is sent to a process (including firing), where the moisture is removed and dried. In the above drying process, it is necessary to charge a large amount of coated welding rods into a long tunnel-shaped drying oven in order to improve productivity.

However, as a method for efficiently drying a large number of welding rods in a drying oven, a rectangular welding rod loading frame is formed, and a frame that can be stacked vertically is stacked in multiple stages. There is known equipment in which the material is mounted on a trolley, the trolley is continuously fed into a long drying oven, and is dried (or fired) by running intermittently. This drying method is designed to be continuous if only the drying oven is considered, but if the processes before and after the drying oven are considered, it can be said that continuity has not been achieved. In other words, in the painting process, welding rods are painted one by one and punched out from a coating die, and in order to send these welding rods to the drying oven, a predetermined number of welding rods must be arranged in advance on a frame ( The work of removing the dried welding rod from the frame (referred to as frame removal or frame disassembly work) is essential. Therefore, in order to achieve continuity in the entire welding rod drying process in a broad sense, it is necessary to consider these frame cutting and frame disassembly operations.

The present applicant automatically frames a predetermined number of coated welding rods sent from the painting process onto a frame in which the welding rods are loaded, in each of the welding rod framing process and frame disassembly process. We have proposed a frame removal device for separating the welding rod from the frame after drying, and an automatic frame disassembly device for separating the welding rod from the frame after drying.
72193 and Japanese Patent Application No. 72194), good results have been obtained.

The present inventors have developed a drying device that is capable of making the overall welding rod drying equipment continuous, including the frame cutting and frame disassembly processes before and after the drying oven, and in particular, the circulating use of welding rod juxtaposed frames. As a result of repeated studies, we decided to place the above-mentioned automatic frame removing device in a position connected to the inlet side of the drying oven, and the automatic frame disassembly device in a position connected to the outlet side of the drying oven. The present invention was completed based on the finding that a desired continuous drying line could be constructed by connecting the empty frame conveying means to the frame disassembly device.

That is, the purpose of the present invention is to efficiently dry coated welding rods, and to dry the entire line including the frame removal position directly connected to the painting process before and after the drying oven, and the frame disassembly position connected to the inspection and packaging process. The object of the present invention is to provide a continuous drying/sintering device for coated welding rods that can be constructed in a continuous and automated manner to improve the productivity of coated welding rods and rationally consolidate equipment.

The main components of the continuous drying and baking apparatus of the present invention are: a long drying oven in which a trolley circulates, a trolley conveyance path arranged to connect the entrance and exit sides of the drying oven, and individual frames. a frame removal device for arranging a predetermined number of undried welding rods in parallel with each other; a frame removal device for removing the dried welding rods from the frame; and an empty frame conveying means for communicating the frame removal device and the frame removal device. Consisting of The frame removing device is connected to the loading position of the frame onto the cart on the drying oven entry side and is also connected to the rod conveying means from the painting process, and the frame disassembling device is connected to the loading position of the frame onto the cart on the drying oven exit side. It is connected to the loading and unloading position of the welding rod, and is also connected to the welding rod conveying means after drying.

In the present invention, the welding rod loading frame has a complete circulation system, and at the framing position, each frame is framed, stacked in a predetermined number of stages and placed on a trolley, and dried in this state. After passing through the furnace, the empty frames are unloaded from the cart at a frame disassembly position outside the furnace, the welding rod is removed from each frame, and the empty frames are transported again to the frame disassembly position and used for frame disassembly work. There are two possible methods for transporting empty frames: a method in which the frames are once pooled and then supplied to the frame picking position, and a method in which the frames are directly supplied to the frame picking position without pooling.

The details of the present invention will be explained below based on embodiments shown in the drawings.

Figure 1 shows an example of the overall layout of the drying equipment of the present invention, in which 1 is a long drying oven for drying or baking the welding rod after coating, and 2 is a long drying oven installed almost parallel to the drying oven 1. A pre-drying oven 3 is a frame loading cart 4 which connects the inlet of the pre-drying oven 2 and the outlet of the drying oven 1.
5 is a carriage lateral transfer path connecting the outlet of the pre-drying oven 2 and the entrance of the drying oven 1; 6 is a carriage vibration means provided at any position on the lateral transfer path 5; 7, 8, 9 are These pushers are installed near the entrance of the pre-drying oven 2 and near the entrance and exit of the drying oven 1, respectively, for pushing or pushing out the cart. The frame loading cart 4 is continuously pushed into the furnaces 2 and 1 by pushers 7 and 8, and is moved intermittently by a constant stroke amount.

Reference numeral 10 denotes a frame loading point for the cart set at an appropriate position on the cart transport path 3; 11 a frame separation point from the cart set at an appropriate position on the transport path 3 upstream of the frame loading point 10; 12 is an automatic frame removing device whose one end is connected to the frame stacking point 10 and the other end is connected to the terminal end of the welding rod transfer conveyor 36 from the painting process; and 13 is an automatic frame removing device whose one end is connected to the frame separating station 11. The other end is an automatic frame disassembly device connected to the starting end of a carry-out conveyor 14 for sending dry welding rods to a processing process. Reference numeral 15 is a conveyor for conveying empty frames from the frame disassembly device 13 to the frame removal device 12. The empty frame conveyor 15 shown in FIG. 1 is of a type without a pool.

FIG. 2 shows details of the frame removal device 12, frame disassembly device 13, and empty frame transport conveyor 15 shown in FIG. One end of the frame removing device 12 is disposed at a location where the welding rod transfer conveyor 36 from the painting process and the empty frame transfer conveyor 15 overlap. That is, the terminal ends of the transfer conveyor 36 (belt conveyor in the figure) and the conveyor 15 (roller conveyor in the figure) are connected to one of the belt conveyors 3
6 is placed on top, and a frame receiving member 16 is installed at the lowest point of this overlapped portion, and is held by an elevating device so that its upper surface can rise above the conveyor 36 and surface 15. The frame receiving member 16 is raised by the lifting device to receive the frame 17 on the roller conveyor 15, and further receives the welding rod on the belt conveyor 36 onto the frame and is separated from the conveyor.
At a position corresponding to the upper limit position of the frame receiving member 16, a pair of left and right frame holding claws 18 that can be freely opened and closed are provided to sandwich the frame 17 from both sides in the longitudinal direction.
8 is a traverse head 19 that is movable in the short side direction of the frame (direction intersecting the conveyors 36 and 15).
is attached to. The traverse head 19
Although not shown in the figure, second and third frame holding claws similar to the frame holding claw 18 are attached to the traverse head 19.
mounted at intervals along the direction of movement of the
For example, when the first frame holding claw 18 is in the frame removing position, there is a rod spacing adjustment table below the second holding claw position that properly rearranges the mutual spacing of the welding rods on the frame, and the third holding claw A frame storage table is provided at the lower position. 2 shown in Figure 1
0 and 21 indicate the positions of these rod spacing adjustment tables and storage tables. Further, when the first holding pawl 18 reaches the adjustment table position due to movement of the traverse head 19, the third holding pawl reaches the frame loading point 10 onto the truck.

On the other hand, as shown on the right side of FIG. 2, the frame disassembly device 13 is located between the frame separation point 11 and the position where the welding rod is taken out from the frame (the overlapping position of the rod carry-out conveyor 14 and the empty frame transport conveyor 15). A carriage 22 that runs across the carriage, a pair of openable and closable frame holding claws 23 hanging from the lower part of the carriage 22, and a pair of frame holding claws 23 that are installed opposite to each other at the overlapping position of the two conveyors and above the carry-out conveyor 14. It is composed of a frame support stopper 24 that can move forward and backward to support the frame carried by frame holding claws 23, and a frame disassembly lifter 25 installed below the support stopper 24. The traveling table 22 is movable via a rack and pinion on a pedestal 26 installed between the frame separation point 11 and the welding rod take-out position, and the frame support stopper 24 is a plate-shaped plate that stably supports the frame. It is formed into a cylinder and moves forward and backward by a cylinder device. Furthermore, the frame disassembly lifter 25 can be raised to a stopper 24 position above the level of the bar delivery conveyor 14 by means of a lifting device.

In addition, in FIG. 2, 27 indicates the frame separation point 11.
28 is a plurality of limit switches for positioning the lifting platform 27; 29 is a photoelectric tube that detects the frame position and operates the support stopper 24; 30 is a This is a limit switch that determines the vertical position of the frame assembly lifter 25. Furthermore, a phototube 31 for detecting a frame and a phototube 32 for detecting a welding rod are arranged close to each other on the side of the frame removing device 12.

Furthermore, the empty frame transport conveyor 15 transports the frames from which the rods have been removed at the frame disassembly position to the frame removal position again, and is comprised of a large number of rollers that are long enough to hold the frames. It is directly connected to the frame position. The roller portions of the frame receiving member 16 and the frame disassembly lifter 25 of the empty frame conveyor 15 are separated from other roller portions, and the frame receiving member 1 is separated from other roller portions.
6 and lifter 25, it can be raised and lowered freely. Further, the conveyor 15 is provided with a first conveyor 15, as shown in FIG.
It is preferable to set a second stopper 34 and a third stopper 35, respectively, to keep the following empty frame waiting at a predetermined position.

Next, the operation of the drying line shown in FIGS. 1 to 3 will be described, but for the sake of convenience, we will start with the framing operation.

First, the empty frame 17 sent by the roller conveyor 15 hits the first stopper 33 and stops. At the same time, one frame worth of welding rods 37 is sent by the transfer conveyor 36. 32, the frame and rod are confirmed, and the frame support member 16 is raised. The distance between the two chains of the transfer conveyor 36 is narrower than the length of the welding rod 37, but larger than the short side of the frame 17 and the width of the frame receiving member 16. The frame 17 held on the raised frame receiving member 16 lifts the bar on the conveyor 36 and stops at the level of the frame holding claws 18 waiting in the open state. Next, the holding claws 18 are closed to hold the frame 17 from both sides, and the traverse head 19 is moved to the bar spacing adjustment position 20, and once the frame 17 is released, the spacing between the bars is adjusted using a magnet device or the like. Adjust. The traverse head 19 moves in the opposite direction to return the holding pawl 18 to the original frame holding position and prepares for the next frame picking operation. ), and when the first holding pawl 18 holds the next frame, the next frame storage position 21 is reached and lowered by movement of the traverse head 19. By the next reverse movement of the traverse head 19, a third holding pawl (not shown) is located in the storage position 21, which holds the frame and allows the next movement of the traverse head 19 to move the frame to the loading position. 10, the frame is transferred onto the trolley 4 by opening the claws. In this way, frames made of a predetermined number of rods are sequentially divided into 1
- They are held by the third holding claw and stacked on the cart 4 in a desired number of stages.

After loading the frames, the cart 4 moves forward and is loaded into the pre-drying oven 2 by the pusher 7, where it is pre-dried.
Next, it is pushed out into the horizontal transfer path 5, vibrated by the vibration means 6, and pushed into the drying oven 1 by the next pusher 8. After the bar has been subjected to the desired drying or baking process in the drying oven 1, the cart 4 is pushed out from the drying oven 1 onto the cart transport path 3, and then moved to the next frame separation point 11.
heading to The cart 4 is loaded into the pre-drying oven 2 and the drying oven 1 almost continuously, and is moved intermittently at a constant pitch.

Next, the cart 4 that has finished drying and moved to the frame separation location 11 stops on the lifting platform 27 and rises to the limit switch 28b position. In this state, the frames 1 are stacked in multiple stages by the frame holding claws 23 of the traveling base 22.
Grasp about 1/3 of 7 and move along the stand 26 to the position where you can take out the welding rod from the frame (the chain line position in Figure 2).
Run. The lifting table 27 is raised in three stages by limit switches 28b, 28c, and 28d, and the lower limit switch 28a determines the lower limit position of the lifting table 27. When the frame is moved by the holding claw 23 to the position where the welding rod is taken out from the frame, the support stopper 24 is advanced to receive the entire frame on the support stopper 24, and the holding claw 23 is returned to hold the next frame. . Next, the frame disassembly lifter 25 is raised to the limit switch 30 to receive the frame on the stopper 24, and the stopper 2
4 is moved backward, the lifter 25 is lowered by the height of one frame, and the stopper 24 is moved forward again to hold the frame that is one frame less. The forward and backward movement of the stopper 24 is controlled by confirming the frame position using a phototube 29.

When the lifter 25 holding one frame is further lowered, the welding rod 37 on the frame is transferred to the carry-out chain conveyor 14 and sent to the next process, but an empty frame remains on the lifter 25. When the roller portion of the lifter 25 matches the level of the empty frame conveyor 15, the rollers are driven to transport the empty frame to the frame picking position. When feeding the frame to the frame removal position,
In order to ensure that each frame is accurately fed to a predetermined position one by one, when one frame is at the frame picking position, the next frame is stopped by the second stopper 35, and the third and subsequent frames are stopped by the third stopper 36. After the first frame has been framed, the second stopper 35 is retracted to feed the next frame, and then the second stopper 35 is extended and the third stopper 36 is retracted. The frame is advanced and stopped by the second stopper 35.

As described above, when using the equipment shown in Fig. 2, the welding rods are placed side by side on the frame (in the direction of the short side of the frame) from the frame removal position to the frame disassembly position and undergo drying.
Slots will be routed without being pooled in a complete circular path. Therefore, the welding rod drying line can be almost completely automated, the welding rods can be efficiently dried or fired, and the productivity of coated welding rods can be greatly improved. Moreover, the bar juxtaposition frame is also used without any waste.

Incidentally, FIG. 4 is a schematic plan view showing another example of the drying apparatus of the present invention, and the arrangement is almost the same as that of FIG. 1, but the empty frame conveying means is different. That is, the empty frame transport conveyors 15a and 15b are arranged in two rows, and these are connected to the frame disassembly position via a chain conveyor 38, and are connected to the frame removal position via an introduction conveyor 39. Moreover,
On the empty frame conveyors 15a and 15b, the frames separated from the bars at the frame disassembly position are stacked in multiple stages and conveyed, and while one conveyor conveys the frames to the introduction conveyor 39, the other conveyor stores the frames. They serve different purposes and are used interchangeably. With this conveyor that has a frame storage function in two rows, the forwarding of frames cannot be said to be as efficient as in Fig. 1, but there is no need to pay much consideration to the consistency of the frame picking operation and frame disassembly operation. , it has the advantage of allowing some leeway in forwarding vacant slots.

As explained above, according to the drying equipment of the present invention,
Since it enables the most efficient and highly productive drying or firing of coated welding rods, its industrial and practical value is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the overall arrangement of the drying device of the present invention, Fig. 2 is a perspective view showing details of the frame removal portion and frame disassembly portion in Fig. 1, and Fig. 3 is a frame removal position and frame disassembly portion. FIG. 4 is a plan view showing another example of the overall arrangement of the present invention. DESCRIPTION OF SYMBOLS 1...Drying oven, 2...Preliminary drying oven, 3...Dolly conveyance path, 4...Dolly, 10...Frame loading area, 11...
... Frame separation point, 12 ... Frame removal device, 13 ... Frame disassembly device, 14 ... Carrying out conveyor, 15 ... Empty frame conveyor, 16 ... Frame receiving member, 17 ...
Frame, 18... Frame holding claw, 19... Traverse head, 22... Travel platform, 23... Frame holding claw, 24...
...Support stopper, 25...Frame disassembly lifter,
27... Lifting platform, 36... Welding rod transfer conveyor,
37...Welding rod.

Claims (1)

[Scope of Claims] 1. A drying oven through which a trolley loaded with frames in which a predetermined number of welding rods coated with a coating material are arranged side by side is passed through, and an inlet side and an outlet side of the drying oven are arranged so as to be connected. a frame removing device connected to the frame loading position of the bogie conveyance path, arranged so as to be continuous with the terminal end of the painted welding rod conveyance means, and for taking in a predetermined number of welding rods onto the frame; A frame disassembly device connected to the frame separation position of the trolley conveyance path and connected to the starting end of the welding rod discharging and conveying means after drying and for removing the welding rod on the frame; and a frame disassembly device connected to the frame removal device. A continuous drying/sintering device for coated welding rods, which comprises an empty frame conveying means. 2. The apparatus according to claim 1, wherein the empty frame conveying means comprises a single conveyance line that directly conveys the empty frames from the frame disassembly position to the frame picking position without pooling them.