KR20040001601A - Horizontality-Level Auto Control Apparatus for Roller of Run Out Table - Google Patents

Abstract

PURPOSE: An apparatus for automatically controlling horizontal level of roller of run out table is provided. CONSTITUTION: The apparatus comprises a horizontal level sensing part for sensing horizontal level of the roller(12) by abrasion quantity of the roller(12); and a horizontal level controlling part for controlling horizontal level of the roller by receiving signals from the horizontal level sensing part, wherein the horizontal level sensing part comprises an abrasion quantity measuring part closely adhered to a lower part of the roller by oil pressure inside a fluid pipe(118) to measure abrasion quantity of the roller; and a leveling sensing part connected to the abrasion quantity measuring part through the fluid pipe(118) to control the leveling motor(240), and the horizontal level controlling part comprises slides for vertically operating a roller base(142); levelers to which the slides are respectively connected; slide bases(252,256,264) to which the levelers are respectively connected; bases(250,256,264) to which the slide bases are respectively connected; fixed guides(248,268) connected to the bases(250,264); fixed blocks respectively connected to the fixed guides(248,268); cylinders(242,274) for vertically moving the fixed blocks; a screw type rotation shaft(230) for moving the levelers back and forth respectively; and a leveling motor(240) for rotating the screw type rotation shaft(230).

Description

Horizontal-Level Auto Control Apparatus for Roller of Run Out Table}

The present invention relates to a device for measuring and adjusting the horizontality of the roll for transporting the hot rolled steel sheet, more specifically, the horizontality of the table rolls are continuously provided at regular intervals in order to transport the hot rolled steel sheet is non-uniform, When the strip passes through the table at high speed, impact is generated at the leading end of the strip by the rolls of different heights in the transfer table. In order to prevent, the present invention relates to a device for automatically adjusting the horizontality of a hot rolled steel sheet feed roller, which measures the horizontality of a table roll in real time during a rolling operation to automatically adjust its height.

In general, as shown in Figure 1, the hot rolling process for producing a hot-rolled steel sheet, the slab heated to a constant temperature in the furnace in the first rough rolling in the shape of the bar (Bar) (11) shape, and then finishing The rolling mill 10 performs the final rolling work in the form of a strip 5, and passes through a run out table 20 and a pinch roll 16 composed of a plurality of feed rollers 12 and rolls. It is wound in a winder in the form to produce a hot coil.

As shown in Figures 2a and 2b, the strip 5 exiting the finishing mill 10 at high speed in the process is usually rolled to a wide variety of sizes such that the thickness is from 1.2mm to 22mm. As shown in FIG. 2B, when the feed roller 12a having a diameter higher than the material flow path (Mill Flow Level) is installed in front of the advance of the strip 5, the leading end 5a of the strip 5 in progress. As the) hits the feed roller 12a, an impact is generated and directed upwards (frying phenomenon), and the vehicle continues to run in the above state.

The frying phenomenon is more severe as the thickness of the strip 5 becomes thinner, and the running property of the strip 5 becomes more unstable. When the tip portion 5a of the strip runs in the frying state, the ramie If it hits the coolant in the air flow (not shown), it causes the lamination phenomenon. Also, if the plate does not overlap and proceeds to remain in the frying state, a severe obstacle occurs when entering the winding machine, and the lamination phenomenon occurs at the winding machine. do.

Further, if the frying phenomenon occurs more severely, the run-out table is instantaneously as the front end portion 5a of the strip strikes a plurality of lamina flow headers (not shown), which are devices for cooling the strip 5. On the 20 (shown in FIG. 1), there was a problem such as poor quality that the strips 5 were piled up and wound up.

On the contrary, as shown in FIG. 2C, when the feed roller 12b installed at the front of the strip 5 becomes smaller in diameter than the height of the material work path due to wear or the like, the leading end portion of the strip 5 in progress ( As 5b) is downwardly hit hardly against the feed roller 12b, a severe impact is generated, and scratches (scratches) are generated due to the severe impact.

The scratches are difficult for the inspector to identify with the naked eye, and in order to find the scratches, it is almost impossible to find a feed roller in which the scratches are actually scratched because a plurality of feed rollers installed at regular intervals of 100m or more must be found slowly. It can be said.

Therefore, in order to solve the above problems, after placing a wide plate-shaped polishing jig having a predetermined length on the run-out table, while rotating the feed rollers at a high speed by using a overhead crane (not shown), etc. There is a method of grinding for the horizontality of the conveying rollers while moving, but in reality, there is a problem that the conveying rollers are actually not polished because the height of the conveying rollers does not exactly match.

Thus, there is a roller level measuring device for solving the above problems, which is a drive gear for transmitting power to the left and right of the servo geared motor and the roller level measuring device for transmitting the roller level measuring device, the chain, of the chain It consists of a main body including a shock absorber, shock absorber, gradient amplifier, power supply, level output device and controller, so that the level of the feed rollers can be measured within a short time so that the roller that does not match the level can be replaced. have.

However, the roller level measuring device has a problem in that the level must be measured in a state where rolling is completed, and thus there is a problem in that it is impossible to grasp or cope with a level defect occurring during rolling. There is a problem that takes a lot of maintenance time of a bad roller that does not fit.

In particular, there is a problem in that there is no method to adjust the level in correspondence with the rollers worn in small quantities, and when there is only one roller that does not match the level in each roller, it is easy to replace, for example, If only one new roller is put in the state, there is a problem that it is not easy to determine the installation position, and in severe cases, the entire roller needs to be replaced.

Therefore, in practice, the level of the feed roller is measured in the field, and if the level does not match, the level is kept constant by inserting a thin liner or the like under the bearing housing of the feed roller, or starting from the rear of the finishing mill to the front of the pinch roll. Although many methods have been devised to meet the level of the feed rollers, such as arranging the out roller feed rollers in stairways, this also has a problem of increasing maintenance costs, and frequent maintenance and import work of the feed rollers. Polishing work) and the like, there is a problem that the productivity of the product is lowered, and also various problems such as the surface quality of the product is lowered.

The present invention has been made in order to improve the above problems, it is possible to continuously detect the amount of wear of the transfer roller generated during the rolling operation to match the horizontality of the run-out table rollers are continuously installed at regular intervals in real time After that, the limit sensor is operated to always maintain a constant height according to the amount of wear, so that the fixing of the bearing block and the level of the roller can be automatically adjusted. It is an object of the present invention to provide a device for automatically adjusting the horizontality of a hot rolled steel sheet feed roller that can prevent the surface quality of a product from deteriorating.

1 is a schematic plan view showing a run out table of a general hot rolling process

FIG. 2A is a front sectional view of FIG. 1

2B and 2C are schematic diagrams showing the problem of the strip tip at part “A” of Fig. 2A;

3 is a perspective view showing a horizontal automatic adjustment device of the hot rolled steel sheet feed roller of the present invention

Figure 4 is a cross-sectional view showing a horizontal automatic adjustment device of the hot rolled steel sheet feed roller of the present invention

Figure 5 is an exploded perspective view showing a horizontal level detecting unit of the horizontal level automatic adjustment device of the hot rolled steel sheet feed roller of the present invention

Figure 6 is an exploded perspective view showing a horizontal level adjusting unit of the automatic horizontal level adjusting device of the hot rolled steel sheet feed roller of the present invention

Figure 7a is a schematic diagram showing the operating state of the wear level measuring unit of the horizontal level detecting unit according to the present invention

Figure 7b is a schematic diagram showing the operating state of the leveling detection unit of the horizontality detection unit according to the present invention

Figure 8 is a flow chart showing the operating state of the horizontal automatic adjustment device of the hot rolled steel sheet feed roller of the present invention

<Description of the symbols for the main parts of the drawings>

12: feed roller 20: run out table

30: drive side housing 32: work side housing

104: wear amount measuring roller 112: measuring loader

116: wear limit sensor cap 118: fluid pipe

128: limit sensor 136: sensor loader

142: feed roller base 146: slide holder

150: limit stopper 202: drive side slide

206: work side slide 214: drive side leveler

226: work side leveler 246: drive side fixed block

250: drive side base 256: intermediate base

262: Work side slide base 268: Work side fixing guide

270: work side fixing block 272: work side fixing guide cover

350: wear amount measuring unit 370: level amount detecting unit

As a means for achieving the above object, the horizontal level automatic adjustment device of the hot rolled steel sheet feed roller of the present invention, the horizontal level detecting unit for detecting the horizontal level of the feed roller by the wear amount of the feed roller, It consists of a horizontal level adjusting unit for adjusting the horizontality of the feed roller in response to the signal, the horizontal level detection unit is in close contact with the lower portion of the feed roller by the oil pressure in the fluid pipe and the wear amount measuring unit for measuring the wear amount of the feed roller, the fluid pipe And a leveling detection unit connected to the wear measurement unit to control the leveling motor, and the horizontal adjustment unit includes a slide for vertically operating the feed roller base, a level to which the slides are coupled, a slide base to which the level groups are respectively coupled, Each of the base to which the slide base is coupled, the fixed guide coupled to the base, and the fixed guide The fixed block to be coupled, the cylinder to move the fixed block, respectively up and down, a screw-type rotary shaft for advancing and reversing the level, respectively, and a leveling motor for rotating the screw-type rotary shaft, characterized in that the wear amount measuring portion wear roller It consists of a roller support to which the roller support is coupled, a measurement loader to which the roller support is coupled, and a fluid pipe to which the measurement loader is coupled, and the leveling detection unit is installed at the bottom of the limit sensor holder and the limit sensor holder to which the limit sensor is assembled and fixed. The cap, and the leveling sensing unit is characterized in that it is composed of a spring and a sensor loader that is in contact with the spring is coupled to the fluid pipe and installed in the lower portion of the sensor cap so that it can be operated according to the change of the fluid.

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

Figure 3 is a combined perspective view showing a horizontal level automatic adjustment device of the hot rolled steel sheet feed roller of the present invention, Figure 4 is a cross-sectional view showing a horizontal level automatic adjustment device of the hot rolled steel sheet feed roller of the present invention, Figure 5 is a hot rolled steel sheet of the present invention 6 is an exploded perspective view illustrating a horizontal level detecting unit of the automatic leveling device of the feed roller, and FIG. 6 is an exploded perspective view showing a horizontal level adjusting part of the automatic leveling device of the hot rolled steel sheet feed roller according to the present invention, respectively, as shown in the drawings. As described above, the apparatus for automatically adjusting the level of the hot rolled steel sheet conveying roller of the present invention includes a horizontal level detecting unit for detecting a wear amount of the conveying roller 12 and a horizontal level of the conveying roller, and receiving the signal from the detecting unit. It consists of a horizontal degree adjustment part for adjusting the horizontal degree of the roller.

As shown in FIGS. 3 and 5, the horizontal level detecting unit is installed between the drive side housing 30 and the work side housing 32 and is coupled to the motor 38 through a coupling 36. The wear amount measuring unit 350 is in close contact with the bottom of the 12 and the leveling detection unit 370 is installed in connection with the wear amount measuring unit 350 through the fluid pipe 118.

In the above configuration, the wear amount measuring unit 350 has a wear amount measuring roller 104 having a hollow portion having a layer formed in the middle of the inside, bearings 106 inserted into both sides of the wear amount measuring roller 104, and the bearings. A stop ring 108 to prevent separation of the 106 and a roller support 110 to which the wear amount measuring roller 104 is coupled by the roller pin 114, and a proximity sensor inside the roller support 110. The wear limit sensor cap 116 (shown in FIG. 7A), which is installed, is composed of a measuring loader 112 connected to the fluid pipe 118 coupled to the tip, respectively.

That is, the roller support 110 is coupled to the measurement loader 112, the measurement loader 112 is coupled to the fluid pipe 118, the wear limit sensor cap 116 is coupled to the tip.

The wear amount measuring unit 350 having the above-described configuration is installed in the conveying roller base 142, and then protrudes into the upper hole 142a formed at the upper portion of the conveying roller base 142 to always be in close contact with the conveying roller 12. do.

The leveling detection unit 370 includes a limit sensor 128, a limit sensor holder 130 on which the limit sensor is assembled and fixed, and the limit sensor holder 130 so that the sensor loader 136 can move up and down smoothly. Sensor cap 132 is installed at the bottom of the), the spring 134 is installed at the lower portion of the sensor cap 132 and the fluid so that the leveling detection unit 370 can be operated sensitively to the change of the fluid, And a sensor loader 136 fastened to the pipe 118 and in contact with the spring 134.

The wear amount measuring unit 350 having the above configuration extends in the feed roller base 142 and is coupled to the end of the fluid pipe 118 protruding outward from the right end of the feed roller base 142. It comes in contact with the stopper 150.

The limit stopper 150 is installed on the upper limit limiter stopper 152 assembled on the work side base 264 (shown in FIG. 6).

On the other hand, at both ends of the fluid pipe 118 is filled with fluid so that the wear limit sensor cap 116 of the wear amount measuring unit 350 and the sensor cap 132 of the leveling detection unit 370 can be assembled. Threads are formed.

The fluid pipe 118 is fixed to the inside of the conveying roller base 142, the clamp (120a, 120b) and the fixing plate 121a, which is introduced through the holes (142b, 142c) formed in the side of the conveying roller base 142 121b).

The feed roller base 142 is formed in a hollow square pipe shape, the inclined plate 142d is installed at both ends of the hollow square pipe. In addition, three slide holders 146 are installed at the lower end, and the drive side housing holder 140 and the work side housing holder 144 and the motor holder are supported on the slide holder 146 by the arm 142e at the upper end. 148 is installed, and the drive side housing 30, the work side housing 32, and the motor 38 are seated and fixed to each of the fixing stands 140, 144, and 148.

3 and 6, the horizontal level adjusting unit includes a drive side base 250, an intermediate base 256, and a work side base 264, and an upper portion of the drive side base 250. A drive side fixing guide 248 and a drive side slide base 252 having a “T” groove are formed in the groove, and a “T” groove of the drive side fixing guide 248 is installed in the drive side fixing block 246. A "T" type wing is inserted slidingly, and a drive side fixing cover 244 is installed on an upper surface of the drive side fixing guide 248.

The upper side of the drive side fixing cover 244 is provided with a cylinder 242 for moving the drive side fixing block 246 up and down, the rod of the cylinder 242 is formed in the center of the drive side fixing cover 244 After passing through a hole (not shown), it is assembled to a hole (not shown) formed in the center of the drive side fixing block 246.

The drive side holder 208 into which the three bushings 210 are inserted is coupled to the drive side slide base 252, and the drive side leveler 214 is inserted into and coupled to the drive side slide base 252. . At this time, three holes 214a, 214b, and 214c are formed at a position coinciding with the three bushings 210 coupled to the drive side holder 208 of the drive side leveler 214. The left thread is formed in the center hole 214b so that forward and backward movement is possible.

The upper side of the drive side leveler 214 is coupled to the drive side slide 202 for leveling by changing the lateral movement to the vertical movement, the upper side of the drive side slide 202 of the lower portion of the feed roller base 142 The slide holder 146 is coupled.

In the above configuration, the drive side slide 202 is machined so that the square groove having the same slope is penetrated through the rectangular flat plate with the slope below, and bolt holes are formed at the square corners of the upper surface to bolt the slide holder 146 to the bolt. It is firmly fixed with.

In addition, an intermediate slide base 258 is installed on an upper portion of the intermediate base 256 having the same height as that of the drive side base 250, and an intermediate leveler 220 is inserted into the intermediate slide base 258. And coupled to each other, the intermediate slide 204 is coupled to the upper portion of the intermediate leveler 220. The slide holder 146 is coupled to the upper portion of the intermediate slide 204.

In the intermediate leveler 220 in the above configuration, three holes 220a, 220b, and 220c corresponding to the holes 214a, 214b, and 214c of the drive side leveler 214 are formed. The right screw thread is formed in the hole 220b. In addition, the intermediate slide 204 is processed to pass through the square groove having the same inclination in the rectangular flat plate with the inclination at the bottom, bolt holes are formed in the square corner of the upper surface to firmly fix the slide holder 146 with bolts Let's go.

The work side fixing guide 268 and the work side slide base 262 formed with a “T” groove are installed on an upper portion of the work side base 264 having the same height as the drive side base 250. The “T” type wing of the work side fixing block 270 is inserted into the “T” type groove of the guide 268, and the work side fixing cover 272 is installed on the upper surface of the work side fixing guide 268. .

In the above configuration, an elliptical hole 268a through which the fluid pipe 118 penetrates is formed in the work side fixing guide 268.

A cylinder 274 for moving the work side fixing block 270 up and down is installed at an upper portion of the work side fixing cover 272, and the rod of the cylinder 274 is formed at the center of the work side fixing cover 272. After passing through the hole (not shown) is assembled to the hole (not shown) formed in the center of the work side fixing block 270.

The work side fixture 232 into which the three bushings 234 are inserted is coupled to the work side slide base 262, and the work side leveler 226 is inserted into the work side slide base 262. . At this time, three holes 226a, 226b, and 226c are formed at positions corresponding to the three bushings 234 coupled to the work side holder 232 of the work side leveler 226. The center hole 226b is formed with a thread that rises to enable forward and backward movement.

The upper side of the work side leveler 226 is coupled to the work side slide 206 for leveling by changing the lateral movement to the vertical movement, the upper side of the work side slide 206 of the lower portion of the feed roller base 142 The slide holder 146 is coupled.

In the above configuration, the work side slide 206 is processed so that the square groove having the same inclination is passed through the square flat plate with the inclination at the bottom, and bolt holes are formed at the square corners of the upper surface to bolt the slide holder 146 to the bolt. It is firmly fixed with.

Meanwhile, a first guide band bracket 254 is installed between the drive side base 250 and the intermediate base 256, and a second guide guide bracket (between the intermediate base 256 and the work side base 264). 260 is installed, and guide caps 218 and 224 are fixed to upper portions of the first guide rod bracket 254 and the second guide rod bracket 260, respectively.

In addition, both ends of the two round rods 212 and 228 and the one screw-type rotating shaft 230 are respectively provided in the bushing 210 of the drive side holder 208 and the bushing 234 of the work side holder 232. Combined, the screw-shaped rotary shaft 230 is located in the middle.

In addition, the two round rods 212 and 228 and one screw-shaped rotary shaft 230 are installed through the holes of the drive side leveler 214, the intermediate leveler 220, and the work side leveler 226. At this time, the left screw thread 230a is machined into the screw-shaped rotation shaft 230 in the portion of the drive side leveler 214 that passes through the hole, and the intermediate leveler 220 and the work side leveler 226 Right screw threads 230b and 230c are machined into the screw-shaped rotary shaft 230 in the portion passing through the hole.

In addition, the right end of the screw-shaped rotating shaft 230, the key groove is formed is coupled to the shaft of the leveling motor 240 through the bushing and the coupling 238, the leveling motor 240 is a work side base (by bolt) 264 is coupled to one side.

Hereinafter, a description will be given of the operation of the automatic adjustment of the horizontal level of the hot rolled steel sheet feed roller of the present invention having the above configuration.

Figure 7a is a schematic diagram showing the operating state of the wear level measuring unit of the horizontal level detecting unit according to the present invention, Figure 7b is a schematic diagram showing the operating state of the leveling detection unit of the horizontal level detecting unit according to the present invention, Figure 8 is As a flowchart showing the operating state of the automatic adjustment device of the hot rolled steel sheet feed roller, as shown in the drawing, when the work preparation state (S1) is first obtained, the feed roller 12 whose horizontal is adjusted is prepared, and the feed roller ( 12, the limit sensor 128 of the leveling detection unit 370 is in an ON state (a state in which the limit sensor 128 is in contact with the limit stopper 150 in a state in which the wear amount measuring roller 104 is in contact with the lower part). )

Subsequently, when the rolling operation is started (S2), the feed roller 12 is driven (S3), the wear amount measuring roller 104 is rotated by the contact force with the feed roller 12, at the same time the limit sensor 128 ) Continues to be on (S4).

Then, when the conveying roller 12 is worn due to the friction force with the conveyed strip during the rolling operation over a long period of time, as shown in Figure 8a and 8b, the measuring loader 112 is a leveling detector ( The force pushed by the spring 134 of the 370 is transmitted through the oil in the fluid pipe 118 to increase by the amount of wear (height h ') of the feed roller 12, and at the same time the leveling sensing unit The sensor loader 136 of 370 has a position of h '' in the h position (the position where the limit sensor 128 is in contact with the limit stopper 150) as the force of the compressed spring 136 is released. As it is lowered, the limit sensor is turned off (OFF) (S5).

In this case, the cross-sectional area of the fluid pipe 118 on the leveling detection unit 370 is smaller than the cross-sectional area of the fluid pipe 118 on the wear amount measuring unit 350, so that the leveling detection unit 370 is sensitive to a small amount of oil movement. Make it move.

Subsequently, it is checked whether the wear limit sensor in the wear limit sensor cap 116 is ON (S6). If the wear limit sensor is in the ON state, the replacement of the feed roller 12 is prepared (S7) for a while. When the rolling operation is suspended (S8), the transfer roller is quickly replaced (S9), and when the replacement is completed, whether the transfer roller is completely replaced or not is manually inputted (S10) to a work standby state. Will go back.

If the wear limit sensor is not turned on in the above process, the cylinder 242 for moving the drive side fixing block 246 up and down and the cylinder 274 for moving the work side fixing block 270 up and down are shown in FIG. 6. It is raised by the operation (S11), the drive side fixing block 246 and the work side fixing block 270 is raised together by the rise of the cylinder (242, 274), and at the same time feed roller base 142 ) Will be released.

Then, when operating the leveling motor 240 (S12) to rotate the screw-shaped rotating shaft 230, the intermediate level and the drive side leveler 214 is assembled with a slope to each thread (230a, 230b, 230c) The machine 220 and the work side leveler 226 are advanced, and each of the slides 202, 204, and 206 assembled on the leveler ascends along the inclined plane while being processed at the same inclination, so that the feed roller base The feed roller 12 assembled to 142 is adjusted to the material work path height.

At this time, as the fluid pipe 118 fixed to the transfer roller base 142 rises, the sensor loader 136 also rises (S13), so that the limit sensor 128 goes up to the position of the limit stopper 150.

Accordingly, the limit sensor 128 is brought into contact with the limit stopper 150 to be in an ON state (S14). When the limit sensor 128 is turned on as described above, the leveling motor 240 is stopped (S15). When the cylinders 242 and 274 are lowered (S16), the drive side fixing block 246 and the work side fixing block 270 are lowered to fix the feed roller base 142.

After returning to the work ready state to continue the rolling work is to repeat the leveling work while continuing to monitor the feed roller 12 in the above operation.

As described above, due to the abrasion of the feed rollers continuously installed at regular intervals in order to transfer the hot rolled steel sheets by the automatic adjustment of the horizontality of the hot rolled steel sheet feed rollers of the present invention, the horizontality becomes uneven and thus the strip is placed on the table. By preventing the impact of the strip end portion generated when passing at a high speed, it is possible to prevent the deterioration of the product and at the same time reduce the productivity.

Claims (2)

Horizontal level sensing unit for detecting the horizontal level of the feed roller 12 by the amount of wear of the feed roller 12, and a horizontal level adjusting unit for adjusting the horizontal level of the feed roller in response to the signal from the horizontal level detection unit However, the level sensor is in close contact with the lower portion of the feed roller by the oil pressure in the fluid pipe 118 wear amount measuring unit 350 for measuring the wear amount of the transfer roller, and the wear amount through the fluid pipe 118 A leveling detector 370 connected to the measuring unit to control the leveling motor 240, wherein the horizontal level adjusting unit includes slides 202, 204, and 206 for vertically operating the feed roller base 142; Levelers 214, 220 and 226 to which slides are respectively coupled, slide bases 252, 256 and 264 to which the levelers are respectively coupled, bases 250, 256 and 264 to which the slide bases are respectively coupled, On the bases 250, 264 Fixed guides 248 and 268 coupled to each other, fixed blocks 246 and 270 coupled to the fixed guides, cylinders 242 and 274 for moving the fixed blocks 246 and 270 up and down, respectively, and the level Horizontal rolling of the hot rolled steel sheet feed roller, characterized in that it comprises a screw-type rotary shaft 230 for advancing and retreating the machine (214, 220, 226), and a leveling motor 240 for rotating the screw-type rotary shaft 230 Automatic adjustment device. According to claim 1, wherein the wear amount measuring unit 350 is a roller support 110 to which the wear amount measuring roller 104 is coupled and the measurement loader 112 and the measurement loader (the roller support 110 is coupled) ( 112 is coupled to the fluid pipe 118, the leveling detection unit 370 is installed in the lower limit of the limit sensor fixture 130 and the limit sensor fixture 130, the limit sensor 128 is assembled and fixed The sensor cap 132 and the leveling detection unit 370 are fastened to the spring 134 and the fluid pipe 118 installed at the lower portion of the sensor cap 132 to be operated according to the change of the fluid Horizontal adjuster of the hot rolled steel sheet feed roller, characterized in that consisting of the sensor loader 136 in contact with the spring (134).