JPS6039757Y2 - Pusher board size check device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pusher plate size checking device used in a high-temperature pusher furnace.

A high-temperature pusher furnace requires a plate to load the processed material and feed it into the furnace.

This plate is called a pusher plate (hereinafter simply referred to as a base plate).

The base plates are laid out continuously over the entire length of the furnace, and by pushing the base plate at the furnace entrance with a pusher, the base plates are sequentially fed into the furnace.

From the furnace outlet, a platform equal to the number of sheets fed is pushed out.

The extruded platform is passed to the furnace entrance and sent into the furnace again by the pusher.

Outside the furnace, the platform moves on a track such as a roller conveyor.

However, there are no tracks inside the furnace.

Due to the high temperatures inside the furnace, the floor is usually made of refractory brick.

Therefore, inside the furnace, the platform slides on the refractory brick floor.

Therefore, a compressive load acts on the base plate, and the dimensions of the base plate gradually change.

The dimensions of the base plate are determined by the size of the furnace.

Therefore, if the dimensions of the base plate change beyond the allowable amount, various problems will occur in the operation of the furnace.

For example, if the bedrock expands beyond the allowable amount, the bedrock that is fed in will block the furnace, rendering it inoperable.

Furthermore, if the platform contracts, the material to be processed will protrude during loading, causing the load to collapse due to contact with walls or riding on the front and rear platforms.

Further, even if an accident does not occur, the position of the platform protruding from the furnace outlet deviates from the specified position due to a change in the dimensions of the platform, resulting in a halt in platform movement and an inability to operate.

This happens especially in long furnaces.

Therefore, it is necessary to check the dimensions of the base plate from time to time.

Previously, workers checked the dimensions by checking the number of times the bed plate had been passed through the furnace.

However, it was very difficult to carry out proper checks due to variations in furnace length, operating temperature, base plate loft, etc.

This necessitated excessive inspections, resulting in wasted work.

Additionally, checks were sometimes overlooked, resulting in furnace blockages and operation stoppages, resulting in significant damage.

An object of the present invention is to provide a butcher board size checking device that can mechanically check the dimensions of a butcher board by eliminating the drawbacks of artificially checking the board dimensions as described above.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Figure 1 shows a butcher board size check device 2 according to the present invention.
7.

2 is a side view of FIG. 1, and FIG. 3 is a plan view of FIG. 1.

The allowable amount of dimensional displacement of the base plate is extremely small, about ±5 m+y+, which is at the very edge of the operating range of a general detector.

Therefore, the dimension checking device of the present invention magnifies and detects the dimensional displacement in order to improve the stability of the detector.

The platform 3 moves on a roller conveyor 4.

The butcher board size check device 27 according to the present invention is attached to the lower side of the roller conveyor 4 by a set plate 12 and a bracket 14.

Shafts 25 and 26 of a checking device 27 are supported on the bracket 14 .

Slide blocks 5 are provided at both ends of the shafts 25 and 26.
and 6 are mounted movably in the axial direction of the shafts 25 and 26.

The slide block 5 and the slide block 6 have the same shape.

The retaining ring 15 prevents the slide blocks 5 and 6 from falling off.

Slide blocks 5 and 6 are 2 as can be seen in Figure 2.
It is attached across the shafts 25 and 26 of the book.

Arms 22 and 23 are erected at the centers of upper surfaces 5a and 6a of slide blocks 5 and 6, respectively.

Rollers 1 and 2 are rotatably attached to the upper ends of arms 22 and 23 by bearings.

The rollers 1 and 2 are arranged at positions where they sandwich the sides of the base plate 3.

On the other hand, arms 7 and 8 are attached to the centers of the lower surfaces 5b and 6b of the slide blocks 5 and 6, respectively.

Hooks 20 and 21 are attached to the tips of arms 7 and 8 so as to face each other.

A spring 13 is connected between the hooks 20 and 21, and the spring 13 always draws the slide blocks 5 and 6 together.

Therefore, the rollers 1 and 2 are always in close contact with both sides of the base plate 3.

Therefore, depending on the width of the base plate 3, the slide block 5
and 6 intervals vary.

That is, when the base plates 3 having different widths pass between the rollers 1 and 2, the displacement of the width can be detected as the displacement of the interval between the slide blocks 5 and 6.

A small rack 10 is installed inside the arm 7 via a small rack bracket 18.

A pinion bar 19 is attached to the inside of the arm 8, and a pinion 9 is rotatably provided at the tip of the pinion bar 19.

The pinion 9 is engaged with the small rack 8.

Further, a large rack 24 is engaged with the pinion 9, and the large rack 24 is attached to shafts 25 and 26 via a base 16 and a rack guide 17.

The rack guide 17 connects the large rack 24 to the shafts 25 and 2.
It is supported movably in the axial direction of 6.

In other words, the large rack 24 can freely move by the rotation of the pinion 9.

The displacement of the large rack 24 is detected by a detector 11 attached to the tip of the small rack bracket 18.

Roller 1 of checking device 27 configured as above
When base plates with different widths pass on the sides of and 2, the distance between the slide blocks 5 and 6 changes, causing a displacement between the small rack 10 and the pinion 9.

Then, the large rack 24 moves, causing a displacement between the detector 11 and the large rack 24 that is twice the displacement of the small rack 10 and the pinion 9.

For example, if the slide blocks 5 and 6 are displaced a in the direction in which the distance between them is widened, the large rack 24 will move toward the arm 8, and a displacement of 2a will occur between the detector 11 and the large rack 24.

On the other hand, if the slide blocks 5 and 6 are displaced a in the direction in which the distance between them becomes narrower, the large rack 24 moves toward the arm 7, and a displacement 2a occurs between the detector 11 and the large rack 24.

If this displacement exceeds the allowable amount, the detector 11 is activated to notify or display that the passing platform 3 is a unique platform, or to stop the drive.

As the detector 11, a limit switch, a non-contact limit switch, a photoelectric switch, or the like is suitable, but the detector is not limited to these.

A photoelectric switch is shown in the drawing.

In the case of a photoelectric switch as shown in the drawings, the photoelectric switch is attached to the tip of the small rack bracket 18 so that the large rack 24 crosses the photoelectric switch when the displacement exceeds an allowable amount.

The mounting position of the detector 11 in FIG. 1 is a position for detecting a wide platform.

To detect a narrow platform, the detector 11 is attached to the arm 7 side of the large rack 24.

Furthermore, two detectors may be placed side by side.

As the enlarging mechanism, a link mechanism is also possible in addition to a gear mechanism.

The checking device 27 according to the present invention reacts only when the distance between the rollers 1 and 2 changes, and does not react when the position of the base plate 3 is simply deviated.

According to the butcher board size checking device of the present invention, the dimensions can be checked every time the base board is passed through the furnace once.

In addition, it is possible to prevent check defects due to individual differences, and improve the accuracy of dimension checks.

As described above, according to the butcher disk size checking device of the present invention, it is possible to ensure the safety of furnace operation, and at the same time, it is possible to eliminate wasteful checking work.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the butcher board size checking device according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a plan view of FIG. 1. 1.2...Roller 3...Pusher board, 4...Roller conveyor, 5,6...
...Slide block, 7, 8...Arm,
9...Pinion, 10...Small rack,
11...Detector, 12...Set plate, 13...Spring, 14...
Bracket, 15...Retaining ring, 16...
・Base, 17...Rack guide, 18...
...Small rack bracket, 19...Pinion bar 20.21...Hook, 22.23...
...Arm, 24...Large rack, 25.2
6...Tsuyaft, 27...Button shearing board size check device.

Claims (1)

[Scope of utility model registration request] A pair of rollers is installed in the middle of a track outside the furnace along which a pusher plate used in a high-temperature pusher furnace moves, so as to sandwich the pusher plate, and the displacement of the gap between the pair of rollers is expanded by an expanding mechanism. A pusher disk size checking device, characterized in that the distance between the pair of rollers, that is, the size of the pusher disk is checked by transmitting the expanded displacement with a detector.