JPH0252983A - Roller hearth kiln - Google Patents

Abstract

PURPOSE:To simplify the attachment and detachment of rollers and reduce the installation cost of the title kiln by a method wherein one ends of the rollers are supported rotatably by receiving rollers provided at the outside of a kiln body and the other ends of the same are engaged with the tip ends of driving shafts through a pin and a key-type groove. CONSTITUTION:One ends of respective rollers 2 are supported by receiving rollers 3, provided at the outside of a kiln body 1, rotatably by putting them on the rollers 3. On the other hand, the other ends of the rollers 2 are provided with roller caps 5, consisting of a heat resistant stainless steel material or the like and attached to the ends through pins 6 and the like while the caps 5 are provided with a key-type groove 7 and a torque is transmitted to the rollers 2 by engaging a pin 10, projected on a boss 9 at the tip end of a driving shaft 8, with the groove 7. The groove is constituted of a transversal groove 7a, extending to the end face of the roller cap 5, and a lateral groove 7b, extending to the rotating direction of the cap 5, and the torque is transmitted by engaging the pin 10 with the lateral groove 7b, however, there is no possibility that the pin 10 is released out of the groove 7 of the roller cap 5 while the pin is being provided with the torque.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in roller hearth kilns used for firing ceramic and industrial products.

(Prior technology) A large number of rollers are placed through a tunnel-shaped furnace body,
2. Description of the Related Art Roller hearth kilns are widely known in which a product to be fired is fired while being moved by rotating each roller at the same speed. Such a roller hearth kiln uses an extremely large number of ceramic hollow rollers, and it is necessary to reliably transmit rotational force while supporting each roller. For this reason, conventionally, as shown in Japanese Patent Publication No. 4877682, the flat end of the drive shaft was fitted into the slit of a roller cap attached to the roller, and the other end of the roller was engaged with the holder shaft. , a tension method in which the rollers are held by pulling the holder shaft outward with a spring built into the holder, and a tension method in which the rollers are held by pulling the holder shaft outwards.
As shown in Japanese Patent No. 0-180991, a compression method has been adopted in which a roller is driven while being pressed against a drive shaft by a spring force.

However, in these roller hearth kilns,
When attaching and detaching the roller, it is necessary to bend the spring, which is time-consuming, and when replacing a damaged roller, the entire holder must be removed and then the roller must be pulled out of the furnace body.Therefore, the holder must be designed to be detachable. However, there were disadvantages such as high equipment costs.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks, and the rollers can be easily attached and detached, and the structure for supporting and driving the rollers is simple and the equipment cost is low. Moreover, it was completed with the aim of creating a roller hearth kiln that could drive the rollers reliably.

(Means for Solving the Problems) The present invention allows one end of a roller passing through a tunnel-shaped furnace body to be rotatably supported by a support row provided on the outside of the furnace body, and drives the other end of the roller. It is characterized in that the roller is rotated by engaging the tip of the shaft via a pin and a groove.

(Embodiment) Next, the present invention will be explained in more detail with reference to the illustrated embodiment. In FIG.
is a ceramic roller that passes through the furnace body (1+).

One end of each roller (2) is attached to the furnace body (1) as shown in FIG.
) is supported so that it can roll freely by being placed on a receiving roller (3) provided on the outside. It is preferable to fit a cap-shaped reinforcing member (4) into the portion of the roller (2) that is supported by the receiving roller (3).

On the other hand, in this embodiment, a roller cap (5) made of heat-resistant stainless steel or the like is attached to a pin (6) at the other end of the roller (2).
It is installed by etc. This roller cap (5
) is formed with a melt-shaped groove (7), and the drive shaft (8)
The pin O1 protruding from the boss (9) at the tip of the groove (7
) to transmit rotational force to the roller (2). The groove (7) has a roller cap (5
) consists of a vertical groove (7a) that extends to the end surface of the pin OI and a horizontal groove (7b) that extends in the rotational direction.
b) to transmit rotational force, but while the rotational force is applied to pin αω, there is no risk that pin QO1 will come off from III (71) of roller cap (5), and groove (7) It may be an L-shaped groove, but in some cases it may be necessary to reverse the roller (2), so it is preferable to use a T-shaped groove as shown in the figure. Similarly, it is supported horizontally by a bearing 0υ, and is driven at a constant speed by engaging a sprocket 03 provided in the middle with an endless chain αj.

(Function) The roller hearth kiln of the present invention configured as described above has the following features:
The difference from the conventional method is that each drive shaft (8) is rotated by an endless chain α1, and thereby each roller (2) is rotated in the same direction at the same speed to move the product to be fired while firing. However, in the present invention, the rotation of the roller (2) is caused by engaging the drive shaft (8) with the end of the roller (2) via the bin α value and the liquid crystal (7). Even though the roller (2) is not subjected to axial tension or compression as in the conventional case, the pin α is always pressed against the tip of the molten groove (7) as it rotates. There is no risk of it becoming uncoupled with the drive shaft (8). Further, in the present invention, since there is no need to apply an axial force to the rollers (2), one tip of each roller (2) is simply placed on the receiving roller (3). Therefore, when replacing the roller (2), all you have to do is remove the pin from the groove (7) of the roller cap (5) and then pull the roller (2) toward the receiving roller (3). Since there is no need to attach or detach the roller against spring force or to remove the holder from the furnace body in advance, there is no need for labor to replace it, and compared to a removable holder, the receiving roller (3) has a simpler structure. It can be manufactured easily and inexpensively, and equipment costs can be significantly reduced. Note that if the groove (7) is formed into a T-shape as in the embodiment, there is an advantage that the roller (2) can be rotated in either forward or reverse direction.

In the embodiment described above, a melt-like groove (7) is formed in the roller cap (5) on the roller (2) side, and a pin αQ is provided in the boss (9) at the tip of the drive shaft (8). As shown in Figure 4, a pin 001 is provided on the inside of the roller cap (5), or a cap 001 is provided on the drive shaft (8) side as shown in Figure 5, so that the pin 001 is provided on the outside of the roller cap (5). It can also be engaged with pin 0I of. Further, as shown in FIG. 6, various modifications are possible, such as providing a pin α. inside the cap α0 on the drive shaft (8) side.

(Effects of the Invention) As explained above, the roller hearth kiln of the present invention has the following advantages: the rollers can be easily attached and detached, the structure for supporting and driving the rollers is simple, and equipment costs can be reduced. It has the advantage that the rollers can be driven reliably and that the products to be fired can be transported and fired in the same way as conventional roller hearth kilns. Therefore, the present invention greatly contributes to the development of industry as a roller hearth kiln that eliminates the problems of the conventional kiln.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a side view showing the relationship between the receiving roller and the roller, Fig. 3 is a perspective view of the main part, and Figs. 4 to 6 are modifications thereof. It is a sectional view showing an example. (1): Furnace body, (2) two rollers, (3): receiving roller,
(7): Groove, (8): Drive shaft, αI: Pin.

Claims (1)

[Claims] One end of a roller (2) penetrating the tunnel-shaped furnace body (1) is rotatably supported by a receiving roller (3) provided outside the furnace body (1), and the other end of the roller (2) Attach the pin (10) and key-shaped groove (7) to the tip of the drive shaft (8).
A roller hearth kiln characterized in that the roller (2) is rotated by being engaged through the roller.