JPS644072Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a mounting structure for rollers in a roller hearth kiln, and more specifically, to improving the ease of attaching and detaching the rollers.

(Prior art) A roller hearth kiln used exclusively as a kiln for rapid firing has a large number of rollers arranged in parallel along the conveyance direction of the object to be fired, and the rotation of these rollers moves the object to be fired. Baking is carried out while being transported.
However, in this roller hearth kiln, the rollers may become worn out or damaged, and in this case, it becomes necessary to replace the rollers. In addition, since the glaze applied to the object to be fired adheres to these rollers, it is necessary to periodically remove and clean them.

However, in order to attach and detach the rollers, it is necessary to temporarily stop the operation of the kiln, and if it takes time to attach and detach the rollers, the kiln operation stop time becomes longer, resulting in a decrease in productivity.

For this reason, various means have been proposed for quickly attaching and detaching the rollers. An example of this is disclosed in Japanese Patent Application Laid-Open No. 58-153082. This technical means consists of a rotary drive shaft 1 as shown in FIG.
A male connecting member 104 and a female connecting member 106 are fixed to the roller 102 with pins 108 and 110, respectively, and these connecting members 104 and 10
6, the roller 102 and the rotary drive shaft 100 are connected, and the driving force from the rotary drive shaft is transferred to the engaging protrusions 1 of the connecting members 104 and 106.
12 and the engagement hole 114, the signal is transmitted to the roller 102.

(Problem to be solved by the invention) However, in this roller mounting structure, the shaft end of the rotary drive shaft 100 is connected to the large diameter cylindrical part 1.
Not only must it be formed as 16;
Many parts such as connecting members 104 and 106 and pins 108 and 110 are required, and the roller 102
When assembling the engaging protrusion 112 and the engaging hole 114
The ease of attachment and detachment is also insufficient.

(Means for solving the problem) The present invention was made to solve the above problem, and its gist is that a large number of rollers are arranged in parallel along the conveyance direction of the object to be fired. , a roller-mounted structure of a roller hearth kiln that bakes the object to be fired while transporting it by the rotation of the rollers, and a spring holding member is provided at the tip of a rotating drive shaft arranged concentrically with the roller to hold the spring. A spring member that is elastically deformable in the radial direction of the roller is fixed to the member, the spring holding member and the spring member constitute a socket into which the end of the roller is fitted from the axial direction, and the spring member in the socket is fixed to the member. The end of the roller is held and rotated by the elastic force of the roller, while the other end of the roller is rotatably supported by a support member.

(Function) With the mounting structure of the present invention, it can be mounted by simply pushing the roller in the axial direction and fitting one end of the roller into the socket provided at the tip of the rotary drive shaft. There is no need to search for an engagement position. On the other hand, to remove the roller, it is sufficient to pull the roller in the axial direction and pull out the end portion from the socket, thereby making it possible to easily and quickly attach and detach the roller.

Further, in the mounting structure of the present invention, it is sufficient to simply provide a socket at the tip of the rotary drive shaft, and the number of parts can be reduced.

The mounting structure of the present invention has a feature that there is no risk of the roller being damaged even when an excessive load is applied to the rotationally driven roller. In the mounting structure of the present invention, the roller is elastically held by the spring member of the socket and rotated based on the elastic force, so that when an excessive load is applied to the roller, the socket and roller do not fit together. This is because the rollers will not be forced to turn due to slippage at the joints.

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

In FIGS. 2 and 3, 10 is a roller hearth kiln having a wall 12 and a burner 14;
A large number of rollers 16 are arranged in parallel at the upper and lower intermediate positions, and the rotation of these rollers 16 causes the object to be fired to
7 is fired while being conveyed. One end of these rollers 16 is held by a rotational drive device 18, while the other end is rotatably supported by a support device 20. Rotary drive device 18
The supporting flume 22 is shown in detail in FIG.
and a rotary drive shaft 26 rotatably supported by the support frame 22 via a bearing 24. The rotary drive shaft 26 is connected to a motor, which is a drive source, through a sprocket 28 fixed to an intermediate portion of the shaft and a chain wound around the sprocket, and the driving force from the motor is transmitted to one end of the roller 16 through a socket 32. Communicate to the department.

On the other hand, the support device 20 has rotating bodies 30, and these rotating bodies 30 rotatably support the ends of the rollers 16 from below.

The socket 32 is shown in FIGS. 1, 6, and 7.
As shown in detail in the figure, it has a cylindrical body 34 as a spring holding member. A female threaded hole 38 is formed in the bottom 36 of the cylindrical body 34, into which the male threaded end of the rotary drive shaft 26 is screwed and coupled, and a plurality of pawls 40 made of leaf springs are circularly mounted on the inner surface of the cylindrical body 34. They are fixed at regular intervals along the circumferential direction. Each pawl 40 has a band-like shape, and its tip portion protrudes inwardly, so that these protruding portions 42 are brought into elastic contact with the outer circumferential surface of the roller 16. Incidentally, the inclined surface 41 of the protrusion 42 acts as a guide surface when the roller 16 is fitted.

Spring 4 is attached to both ends of the other roller 16.
4,46 are wound around. One of the springs 44 is connected to the roller 16 by locking its one end 48 to the protrusion 42 of the pawl 40.
The other spring 46 is a portion of the support device 20 that receives support from the rotating body 30. However, in this example, the same springs 44 and 46 are used, and their lengths (lengths in the axial direction of the roller 16) are also the same.
Note that these springs 44 and 46 are connected to the roller 16.
It acts to protect the edges where damage such as chipping is most likely to occur.

In this roller hearth kiln 10, in order to remove the roller 16, it is sufficient to grasp the end of the roller 16 on the supporting device 20 side and pull it out in the axial direction. Since the socket 32 holds the end of the roller 16 only by the elastic force of the claw 40, the roller 1
6 can be easily removed from the socket 32 by simply applying a force in the pulling direction.

To install the roller 16 in the opposite direction, hold one end of the roller 16 and insert the opposite end into the socket 3.
Just push it to 2. At this time, socket 32
The claws 40 are easily elastically deformed in the expansion direction by the guiding action of the tip inclined surface 41. When the end surface of the roller 16 comes into contact with the bottom surface of the cylindrical body 34 of the socket 32, each protrusion 42 comes into elastic contact with the outer peripheral surface of the roller 16, thereby holding it and at the same time engaging one end 48 of the spring 44. (The winding length of the spring 44 is set to such a length in advance). When the motor is rotated in this state, the driving force is transferred from the rotary drive shaft 26 to the socket 32, and then to the roller 1 through the pawl 40.
6, and the roller 16 is rotated. At this time, the other end of the roller 16 is rotatably supported by the rotating body 30 of the support device 20.

In this way, in the mounting structure of this example, the claw 40
The roller 1 is moved from the rotary drive shaft 26 by the elastic force of
The driving force is transmitted to 6. Therefore, when an excessive load is applied to the roller 16, slipping occurs between the pawl 40 and the roller 16. Therefore, the roller 16 is not forced to rotate, and damage such as breakage and chipping caused by the forced rotation of the roller 16 can be avoided.

In this example, when the spring 46 at one end of the roller directly supported by the rotating body 30 of the support device 20 wears out, the direction of the roller 16 is reversed and the spring 44 at the other end is attached to the rotating body 30. The spring 46 on the worn side can then be fitted into the socket 32 for support. At this time, one end 50 of the spring 46 becomes a locking part for the protrusion 42 of the claw 40.

Further, when both the springs 44 and 46 are worn out, these springs 44 and 46 can be replaced with new springs.

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 spring holding member does not necessarily have to be a cylindrical body as in the above example, and other shapes can be used as long as they can hold the spring member.
In short, the object of the present invention can be achieved if the spring holding member and the spring member constitute a socket into which one end of the roller is fitted from the axial direction.

In addition, it is desirable to wrap a spring around both ends of the roller to prevent the roller from coming off and to prevent the roller from wearing out.However, such a spring is not an essential requirement for the present invention, and other means may be used to prevent the roller from coming off. It is also possible to do the following.

In addition, the present invention can be configured in various forms without departing from the spirit thereof.

(Effects of the Invention) As described above, in the present invention, a socket is provided at the end of the rotary drive shaft, and the end of the roller is fitted into the socket.

This not only makes it possible to easily and quickly attach and detach the rollers, but also prevents the rollers from being forced to rotate, resulting in excellent effects such as prevention of damage such as chipping of the rollers.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main parts of a roller mounting structure that is an embodiment of the present invention, and FIGS.
The figures are a front sectional view and a plan sectional view of the roller hearth kiln with the rollers attached.
FIG. 4 is a front view showing the roller of FIGS. 1 to 3, its rotational drive device, and support device, and FIG. 5 is a diagram showing the arrangement of rotating bodies in the support device of FIG. 4. Figures 6 and 7 are figures 1 to 4.
8 is a sectional view and a side view of the socket shown in the figure, and FIG. 8 is a sectional view of a main part showing an example of a conventional roller mounting structure. 10...Roller hearth kiln, 16...Roller, 17...Sintered object, 26...Rotation drive shaft,
30...Rotating body, 32...Socket, 34...Cylindrical body, 40...Claw.

Claims (1)

[Claim for Utility Model Registration] A roller hearth kiln with a roller mounting structure in which a large number of rollers are arranged in parallel along the conveyance direction of the object to be fired, and the object to be fired is conveyed and fired by the rotation of these rollers. , a spring holding member is provided at the tip of the rotary drive shaft arranged concentrically with the roller, a spring member that is elastically deformable in the radial direction of the roller is fixed to the spring holding member, and the spring holding member and the spring member are fixed to the spring holding member. A socket is formed into which the end of the roller is fitted from the axial direction, and the end of the roller is held and rotated by the elastic force of a spring member in the socket, while the other end of the roller is held by a support member. A mounting structure for a roller in a roller hearth kiln characterized by being rotatably supported.