JPS6245470B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a conveying device for a conveying roll in a roller hearth kiln equipped with a conveying roll capable of rotation and revolution.

[Conventional Structure and Problems Therewith] In Japanese Patent Application No. 59-5099, the present applicant proposed a roller hearth kiln equipped with a conveyor roll that can rotate and revolve.

The roller hearth kiln related to this earlier application is the 6th application.
As shown in Figures 7 to 7, the furnace bottom 2 is made of refractory bricks, etc.
The lower half furnace body 2 of the tunnel kiln main body 1 is integrally formed with the lower half furnace side walls 2b, 2b, and the lower half furnace side walls 2b, 2b on both left and right sides of the lower half furnace body 2.
Place the lower half 2 of the furnace side wall at approximately the same height as the upper end.
Endless chains 4, one each on the left and right, are stretched so as to move along the lower halves 2b, 2b of the furnace side walls, and return along the lower halves 2b, 2b of the furnace side walls at a position lower than the furnace bottom 2a, and both endless chains 4 .
Chucking means 6, 7 attached with 50 mm)
The left and right ends are gripped by the left and right chucking means 6 and 7, and as the endless chain 4 is driven synchronously, the lower half furnace 2 is moved directly above the lower furnace half 2 in the longitudinal direction. A conveying roller 8 made of a refractory material and having a length between its axes longer than the width of the lower furnace half body 2, and a height dimension that does not impede the conveyance of the conveying roller 8. The furnace ceiling portion 3a and the left and right upper half portions of the furnace side walls 3b are suspended from above using refractory bricks or the like, such that a transmission gap G is provided between the lower half portions 2b of the furnace side walls and the upper end surfaces of 2b. ,3
b, a planetary device 9 consisting of a chain sprocket formed in the chucking means 6, and at least one of the circumferential circuits of the endless chain 4 of the tunnel kiln body 1. A solar device 1 comprising a second chain disposed over the entire longitudinal outer area and meshing with the planetary device 9.
It is composed of 0. As shown in FIG.
Support shafts 12, 12' integrally formed with support shaft 1
The rotary cylinders 14, 14' are attached to the rotary cylinders 14, 14' through bearings 13, 13, and pressing tools 15, 15' are screwed onto the inner ends of the rotary cylinders 14, 14'.
Further, the chucking means 6 on the right side is connected to the rotary cylinder portion 1.
A planetary device 9 consisting of a chain sprocket is screwed onto the right end of 4.

However, the conveying roller feeding device 11 consisting of the left and right chucking means 6 and 7 has the following drawbacks.

○A Support shafts 12, 12' are endless chain 4
Since it is cantilever-supported, the pressing tools 15, 1
5' becomes large, and stable support for the conveying roller 8 is lacking. As a result, the conveyance roller 8 rotates while swinging, making it impossible to stably convey the object to be fired.

○B Since the planetary device 9 consisting of a chain sprocket attached to the right chucking means 6 is located inside the endless chain 4, the solar device 10 consisting of a second chain meshing with the planetary device 9 is placed in a high temperature tunnel kiln. It is affected by heat from the main body 1. As a result, the frequency of replacing the thermally expanded solar device 10 increases, reducing the usage efficiency of the roller hearth kiln.

[Object of the present invention] In order to solve the above-mentioned drawbacks, it is an object of the present invention to provide a conveyance roller guiding device in which the chucking means has less vibration and does not have a thermal influence on the planetary device and the solar device.

[Structure of the Invention] The gist of the present invention is that the left and right parts of the tunnel kiln body are divided into a lower half and an upper half by providing a conveying gap with a height dimension that does not impede the conveying of conveying rollers, which will be described later. One endless chain on each of the left and right sides is stretched so as to move along the tunnel kiln body at approximately the same height as the feeding gap on both outsides, and is attached to each of the endless chains at regular intervals. a planetary device consisting of chucking means for gripping both ends of the conveyance roller; a chain sprocket formed on the chucking means attached to either the left or right endless chain of the chucking means; The circuit is arranged at least in the entire longitudinal outer area of the tunnel kiln main body,
In the conveying roller conveying device in a roller hearth kiln, which comprises the planetary device and a solar device having a second chain that meshes with the planetary device, the chucking means on which the planetary device is formed is attached to the left and right link plates of the endless chain, respectively. An attached bearing, a support shaft supported by both bearings, a guide roller rotatably fitted onto the support shaft between the two bearings, a chuck head provided at the inner end of the support shaft, and a support shaft. The planetary device fitted near the outer end of the shaft, and the chucking means on which the planetary device is not formed include bearings attached to the left and right link plates of the endless chain, respectively, and a chucking means that is pivotally supported by both bearings. It consists of a support shaft, a guide roller rotatably fitted onto the support shaft between the two bearings, and a chuck head provided at the inner end of the support shaft, and includes at least the tunnel of the circumferential circuit of each endless chain. Roller guide rails corresponding to the guide rollers constituting each of the left and right chucking means are laid over the entire longitudinal outer region of the kiln body.

[Description of Embodiments] The present invention will be described below based on the embodiments shown in FIGS. 1 to 5. The main improvements of the present invention are:
As shown in FIG. 1A, the right chucking means 16
The bearings 21, 21 attached to the left and right link plates 4'a, 4'a of the endless chain 4'
, a support shaft 22 supported by the left and right bearings 21, 21, and a guide roller 23 rotatably fitted onto the support shaft 22 between the left and right bearings 21, 21.
The chuck head 24 is slidably fitted onto the inner end of the support shaft 22, and the retaining ring 48 is fitted onto the outside of the support shaft 22 and is inserted between the chuck head 24 and presses the chuck head 24 inward. Consisting of a compression coil spring 26 and a planetary device 19 equipped with a chain sprocket fitted near the outer end of the support shaft 22, as shown in FIG. Bearings 21 attached to left and right link plates 4'a, 4'a of endless chain 4',
Support shaft 2 supported by left and right bearings 21, 21
2', and a guide roller 23 rotatably fitted onto the support shaft 22' between the left and right bearings 21, 21.
and a chuck head 24' attached to the inner end of the support shaft 22'. Roller guide rail 2 corresponding to guide rollers 23, 23 constituting left and right chucking means 16, 17
7 and 27, respectively. As shown in FIGS. 2 and 3, the left and right endless chains 4', 4' are connected to chain sprockets 29, 29...
The endless chains 4', 31 are guided by left and right chain guide rails 31, 31 attached to the frame 18a, and driven synchronously by a chain drive motor 32 (see FIG. 1). 4' becomes unstable during driving, the left and right reversible sprockets 29, 2 arranged on the loading side E of the roller hearth kiln (not shown)
By braking 9 with a drive motor or brake having braking characteristics, an appropriate back tension is applied to the chains 4', 4' stretched between the carry-in side E and the carry-out side F. Tighten it so that the endless chains 4', 4' can be driven smoothly.
The embodiment shown in FIG.
Although one chain is strung on both the left and right outside of the tunnel kiln main body 1, the present invention is not limited to this in any way, and although not shown in the drawings, the endless chain strung area may be pre-strung, for example, along the front-rear direction. Of course, it is also possible to divide the zone into a tropical zone, a firing zone, a cooling zone, etc., and construct one or more endless chains in each section.

Conveyance rollers 8, 8, . . ., which are cylindrical porcelain rollers detachably attached to each set of chucking means 16, 17, move the tunnel kiln main body 1 as the endless chains 4', 4' move. The transport means is configured to move within a transport means passage A extending in the longitudinal direction of the transport means. As shown in FIGS. 1A and B and FIG. 4, two adjacent front and rear conveyance rollers 8,
Seal plates 34 are fitted near the side ends of the tubes 8 as necessary to reduce the amount of air outside the furnace flowing into the furnace, and to prevent radiant heat inside the furnace from the conveying means passage A to the outside of the furnace. It is made so that it does not leak.
The seal plates 34, 34, . . . are configured to pass through a seal plate passage B formed at the outer edge of the upper half furnace body 2 and the lower half furnace body 3, accompanying each conveyance roller. .

As shown in FIGS. 2, 3, and 5, a solar device 20 that applies a rotational reaction force to the planetary devices 19, 19, etc. in order to rotate the conveyance rollers 8, 8, etc. A second endless chain 35 stretched so as to mesh with a certain chain sprocket; and a second endless chain 35.
A gear box 38a and a line that transmit driving force to a guide rail 36 (see FIGS. 3 and 5) attached to the frame 18a so as to guide A transmission means 38 consisting of a shaft 38b etc., and a drive source 3 consisting of a variable speed motor etc.
9 (see FIG. 2), and is configured to rotate the conveying rollers 8, 8, . . . around their central axes at a desired rotational speed. The second endless chain 35, together with the planetary device 19 and the solar device 20, forms a kind of differential rotation mechanism (same principle as a differential gear).

Note that the solar device 38 is not limited to any driving method and is not shown in the drawings;
The solar device, which is the second chain that meshes with the chain sprocket 9, is fixed on the guide plate along the front and back direction while going from the carry-in position E to the carry-out position F shown in FIG. Of course, it is also possible to configure the conveyance roller 8 to rotate as the chains 4', 4' are driven.

As shown in 1A and 1B, roller guide rails 27 are laid parallel to the chain guide rail 31 on each of the left and right longitudinal beams 18a, 18a of the frame 18, and guide the guide rollers 23, 23. Support shafts 22, 2 of each chucking means 26, 27
2 maintains a horizontal state without centering.

[Function] Next, the function of the conveying roller conveying device in the roller hearth kiln according to the present invention will be explained. As shown in FIGS. 1A and 1B, the tracking means 16,
17 has a tracking head 24, 2 at the inner end.
The upper and lower sides of the support shafts 22, 22' equipped with 4' are provided with guide rollers 23, 23 and endless chains 4',
4' to the roller guide rails 27, 27 and chain guide rails 31, 31, the tunnel kiln is guided by the endless chains 4', 4' while maintaining a horizontal state without center runout as the endless chains 4', 4' move. Stable movement on the outside of the main body 1. The conveying rollers 8, 8, whose both ends are gripped by the chucking means 16, 17, which move stably in this manner, move within the tunnel kiln main body 1 while rotating without center runout.
Objects to be fired (not shown), such as tile bases, placed on transport rollers 8, 8 (see FIG. 2) are transported into the kiln without disturbing their alignment. Furthermore, since the planetary device 19 is fitted into the chucking means 16 near the outer end of the support shaft 22, the planetary device 19
and a second chain 35 constituting the solar device 20
is largely separated from the tunnel kiln main body 1, so that the thermal influence from the tunnel kiln main body 1 is reduced. In addition, if glaze or the like adheres to the surfaces of the conveyance rollers 8, 8, etc. and the objects to be fired cannot be conveyed smoothly, the endless chains 4', 4' are intermittently moved to the carry-in side E or the carry-out side F. The conveying means 14 that has come out of the furnace due to this intermittent movement is replaced with a new one while the endless chains 4', 4' are stopped. The conveyance rollers 8, 8, . . . can be replaced in a short time by anyone simply by moving the chuck head 24 of the chuck means 16 outward against the compression coil spring 26.

[Effects of the Invention] The conveying roller conveying device in a roller hearth kiln according to the present invention has the following excellent effects.

Since the upper and lower sides of the support shaft constituting the chucking means are guided by the roller guide rail and the chain guide rail, the shaft moves stably while maintaining a horizontal state without center runout. As a result, the conveyance roller, whose both ends are gripped by the chucking means,
It moves within the tunnel kiln main body while rotating without center runout, and can be transported within the kiln without disturbing the alignment of objects to be fired, such as tile bases placed on the transport rollers.

The planetary device attached to the chucking means and the second chain that meshes with the planetary device are far apart from the tunnel kiln body, so they are less affected by heat from the tunnel kiln body, and the frequency of replacement due to thermal effects is extremely reduced. do. As a result, the usage efficiency of the roller hearth kiln is significantly improved compared to the conventional method.

[Brief explanation of the drawing]

1 to 5 show an embodiment of a conveying roller conveying device in a roller hearth kiln according to the present invention, and FIG. 1A is an enlarged front sectional view showing the chucking means on the right side; Figure B is an enlarged front sectional view showing the chucking means on the left side, Figure 2 is a side view with the middle omitted showing the main parts of the roller hearth kiln, Figure 3 is an enlarged sectional view cut along the line - - in the same figure; Figure 4 is an enlarged side view showing the seal structure on both sides of the roller hearth kiln, Figure 5 is an enlarged side view showing the solar device with the middle omitted, and Figures 6 to 8 show a conventional roller hearth kiln. FIG. 6 is a side view showing the main parts with the middle omitted, FIG. 7 is an enlarged sectional view cut along the line ``--'', and FIG. 8 is an enlarged sectional view showing the chucking means with the middle omitted. 4'... Endless chain, 16, 17... Chucking means, 19... Planetary device, 20... Solar device, 21... Bearing, 22, 22'... Support shaft, 23
...Guide roller, 24, 24'...Chick head, 2
7... Roller guide rail, 31... Chain guide rail, 35... Second chain.

Claims (1)

[Scope of Claims] 1. On both left and right outer sides of the tunnel kiln body, which is divided into a lower half and an upper half, with a conveyance gap having a height dimension that does not impede the conveyance of conveyance rollers, which will be described later, One endless chain on each side of the tunnel kiln is stretched so as to move along the tunnel kiln body at approximately the same height as the conveyance gap, and conveyance rollers are attached to each of the endless chains at regular intervals. a planetary device consisting of a chain sprocket formed on the chuck means attached to either the left or right endless chain of the chuck means; and at least one of the circumferential circuits of the endless chain. In a conveying roller conveying device in a roller hearth kiln, the planetary device is formed of a solar device disposed in the entire longitudinal outer area of the tunnel kiln main body and equipped with a second chain that meshes with the planetary device. The chucking means includes bearings attached to the left and right ring plates of the endless chain, a support shaft pivotally supported by both the bearings, and a guide roller rotatably fitted onto the support shaft between the two bearings. The chucking means is composed of a chuck head provided at the inner end of the support shaft and the planetary device fitted near the outer end of the support shaft, and the chucking means on which the planetary device is not formed is attached to the left and right ring plates of the endless chain. From the respective bearings attached, a support shaft supported by both bearings, a guide roller rotatably fitted onto the support shaft between the two bearings, and a chuck head provided at the inner end of the support shaft. Roller guide rails corresponding to the guide rollers constituting the left and right chucking means are laid in at least the entire lengthwise outer area of the tunnel kiln body in the circumferential circuit of each of the endless chains. A conveying device for conveyor rollers in a roller hearth kiln. 2. The chuck head is slidably fitted on the support shaft, and the one chuck means includes a compression coil spring that is externally fitted near the inner end of the support shaft and presses the chuck head inward. A conveying device for conveying rollers in a roller hearth kiln according to claim 1.