JPH038951Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a roller pull-out device for a roller hearth kiln, and more particularly to a device that can pull out rollers during operation of a roller hearth kiln.

(Prior Art) One type of firing kiln is a roller hearth kiln, in which fired products are placed on rotatably arranged rollers and moved inside the kiln by the rotation of the rollers.

However, in this roller hearth kiln, there is a problem that glaze adheres to the roller surface or iron powder from the chain type conveyor installed before and after the entrance and exit of the kiln adheres. This caused the fired products to wobble or become disorganized while moving inside the kiln.

(Problem to be solved by the invention) Therefore, in such roller hearth kilns, the operation of the kiln is periodically stopped, the rollers are pulled out, and the surfaces of the rollers are cleaned by scraping off the deposits. However, in this case, production efficiency decreases because the kiln is stopped during cleaning, and a large number of rollers (for example, about 1000 for one kiln) must be cleaned in a short period of time. , a lot of manpower is required for this work.

Furthermore, since the kiln cannot be stopped and the rollers cannot be cleaned frequently, glaze, etc. remains on the roller surface until the next cleaning, and therefore, smooth roller conveyance of the fired product is not necessarily achieved during that time. There will be no.

Also, if the deposits on the roller surface accumulate beyond a certain level, the roller cannot be pulled out of the kiln when cleaning the roller.In this case, the roller must be broken (the roller is made of ceramics).
You will have no choice but to use another new roller.

(Means for Solving the Problems and Actions/Effects) Therefore, the present inventor focused on pulling out the rollers while the kiln is in operation, and devised a device for that purpose.
The gist of the device is a cylindrical roller holder having a roller insertion hole into which a roller pulled out from a roller hearth kiln is inserted, and a heat insulating material layer provided on the outside of the roller insertion hole. and legs that support the roller holder in a substantially horizontal position.

Since the rollers of a roller hearth kiln are made of ceramics, a particular problem when pulling out the rollers while the kiln (roller hearth kiln) is in operation is the occurrence of cracks due to rapid cooling of the rollers. Because of these difficult problems, conventionally no one had considered pulling out the rollers and cleaning them while the kiln was in operation, but the device of the present invention can eliminate such cracks. The rollers can be pulled out while the kiln is in operation without having to do so. Specifically, when the roller is pulled out of the kiln, it is inserted into the insertion hole of the roller holder, and the roller is held by the holder. The cooling rate of the roller inserted and held in the insertion hole is moderated by the effect of the heat insulating layer provided on the outside thereof, so that cracks, chips, etc. due to rapid cooling do not occur.

When the temperature of the roller has decreased to below a certain temperature, it is necessary to take it out from the roller holder and remove the deposits on the surface.

On the other hand, another new roller is inserted into the part where the roller was pulled out. This allows the kiln to continue operating.

As described above, according to the device of the present invention, the rollers can be pulled out and cleaned while the kiln is in operation. Therefore, there is no need to intensively clean all the rollers within a certain period of time, and the rollers can always be kept clean. This allows the baked product to be transported smoothly at all times, and eliminates the possibility of the roller not being able to be pulled out due to deposits on the roller surface.
At the same time, the service life of the rollers is also improved. In other words, if there is any deposit on the roller surface, stress concentration will occur at or near the deposited area, causing cracks or other defects on the roller. However, by keeping the roller clean at all times, this This improves lifespan.

In the present invention, the roller holder and the legs can be separate and separable, and in this case, after the roller is pulled out of the kiln and inserted into the roller holder, the roller holder can be separated from the legs. It becomes possible to carry out subsequent processing, and subsequent work becomes easier.

In addition, if the height of the roller holder can be adjusted by providing a height adjustment mechanism on the legs, it will be possible to easily respond to changes in the height of the rollers or the height of the floor. This gives rise to the advantage of being able to

(Example) Next, an example of the present invention will be described in detail based on the drawings.

In FIG. 2, reference numeral 10 denotes a kiln (roller hearth kiln) in which a large number of rollers 12 are arranged in a row at a predetermined height position, and the fired product 14 on the rollers is transported inside the kiln by the rotation of the rollers 12. It's getting old.

The roller 12 is made of ceramic and has a cylindrical shape, as shown in FIG. Supported by device 20. Also, one of the support rods (the left support rod in Figure 2) 16
A sprocket 22 is fixedly attached to the support rod 16, and the driving force from a drive chain (not shown) is transmitted to the support rod 16 and further to the roller 12 via the sprocket 22.

Note that the bearing member 24 in each bearing device 20 is
It is fitted into a fitting hole of the frame 26, and is prevented from coming off by a falling-off preventing member such as a retaining pin or a retaining ring.

The specific structure of the drawing device of this example for drawing out the roller 12 from the kiln 10 is shown in FIG. As shown, the pull-out device includes a roller holder 28 and legs 30 that are separate and separable from the roller holder 28. The roller holder 28 has a cylindrical stainless steel outer cylinder 32 and an inner cylinder 34 filled with a heat insulating material 6 (glass wool in this case), and has a roller insertion hole 3 in the center.
It has 8.

On the other hand, the leg 30 has a support portion 42 having an arc-shaped receiving surface 40 at the upper end.
The lower surface side of the roller holder 28 is supported by the second receiving surface 40 . Further, the leg 30 is provided with a vertical adjustment mechanism 44, and the vertical position of the support portion 42 is adjusted by the vertical adjustment mechanism 44. That is, when the handle 46 of the vertical adjustment mechanism 44 is rotated, the screw 4
The support portion 42 can be moved up and down by the action of 8.

In this example, the inner dimension L of the kiln 10 (see Figure 2) is 1200 mm, the length of the roller 12 is 1800 mm, the length of the roller holder is 1600 mm, and the diameter of the roller insertion hole 38 is , outer diameter of roller 12
It is 45mmφ compared to 38mmφ.

Next, the procedure for pulling out the roller 12 using this device will be explained.

First, the roller holder 28 is attached to the support part 42 of the leg 30.
While placed on top of the roller, it is positioned to the side of the roller 12 to be pulled out, as shown in FIG.
Next, remove the retaining members such as the retaining pin and retaining ring of the bearing device 20, and remove the bearing member 24 and the support rod 16.
is removed, and the roller 12 is pulled out in the axial direction. The pulled-out roller 12 is then gradually inserted into the insertion hole 38 of the roller holder 28, which has been set in advance, as shown in FIG.
In this example, since the length of the roller holder 28 is shorter than the length of the roller 12, both ends of the roller 12 protrude from the holder 28 when the roller 12 is completely pulled out. However, since the temperature of both ends of the roller 12 is not originally that high, there is no problem even if the ends protrude from the holder 28.

After the roller 12 is inserted into the insertion hole 38 in this manner, the roller holder 28 is removed from the legs 30 and stored in a separate storage location to be allowed to cool naturally. When the temperature drops below a certain level, the roller 12 is taken out from the insertion hole 38 and the deposits on its surface are removed.

On the other hand, a new roller 12 is separately set in the part of the kiln 10 from which the roller 12 is pulled out. This allows the kiln 10 to continue operating.

By using the device of this example in this way, the roller 12 can be pulled out from the kiln 10 during operation.
Thereby, the surface of the roller 12 can always be kept clean, and it is also unnecessary to stop the kiln 10 and intensively clean the roller 12.

Although the embodiments of the present invention have been described in detail above, the present invention can also be configured in other forms.

For example, the length of the roller holder 28 may be at least equal to or longer than the internal dimension L of the oven 10, and can be formed into various lengths. Further, the present invention can be modified in various ways without departing from the spirit of the invention, such as using materials other than the above-mentioned glass wool as the heat insulating material.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a roller pull-out device that is an embodiment of the present invention, FIG.
The figure is a sectional view showing a schematic configuration of the roller end and the bearing device, and FIG. 4 is an explanatory view for explaining how to use the drawing device of FIG. 1. 10: roller hearth kiln, 12: roller, 28: roller holder, 30: leg, 36: heat insulator, 38: roller insertion hole, 44: height adjustment mechanism.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical roller holder having a roller insertion hole into which a roller pulled out from a roller hearth kiln is inserted, and a heat insulating material layer provided on the outside of the roller insertion hole; , and legs for supporting the roller holder in a substantially horizontal position. (2) The roller drawer device according to claim (1), wherein the leg is separate and separable from the roller holder. (3) The roller drawer device according to claim 1 or 2, wherein the legs are provided with a height adjustment mechanism for adjusting the height position of the roller holder.