Roller-type wire rod collecting, conveying and cooling system

Abstract

A roller-type wire rod collecting, conveying and cooling system, relating to the technical field of wire rod coil production. The system comprises: a coiling drum and a lifting platform that are vertically and correspondingly arranged, a coil lifting / lowering elevator being arranged at a side of the coiling drum and the lifting platform, and a coil core holder being in sliding fit with the lifting platform; and a roller conveying line for laterally conveying the coil core holder, the roller conveying line being a closed-loop roller line consisting of a coil input roller line and a coil core holder return roller line, a turnover platform for flipping and discharging the coil core holder carrying a coil being arranged at a junction of the coil input roller line and the coil core holder return roller line, a coil transfer vehicle being arranged at an output end of the turnover platform, and rotating platforms being arranged at corners of the roller conveying line. By arranging proximity switches and gratings on the lifting platform, the turnover platform, the coiling drum, the rotating platforms, and the coil lifting / lowering elevator, the in-place prompt of the coil core holder and the detection of whether each mechanism moves in place are realized, thereby realizing fully automatic and unmanned operation of the system. Cooling components are circumferentially arranged in the coiling drum, and coiling and cooling of a wire rod are integrated, thereby achieving efficient cooling effects.

Description

A roller conveyor wire collection, conveying and cooling system

[0001] This application claims priority to Chinese Patent Application No. CN202411903809.5, filed on December 23, 2024, entitled "A Roller Conveying and Cooling System for Wires", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of wire coil production technology, and in particular to a roller conveyor wire collection, conveying and cooling system. Background Technology

[0003] In the production process of coiled wire, the surface quality of the steel and its subsequent processing performance play a crucial role. To ensure smooth production, the steel must be heated to an appropriate temperature to soften the material and facilitate subsequent rolling operations. The rolling process involves a series of precisely designed rollers that carefully press the heated wire into a stacked and flat bent structure. After rolling, the wire passes through a series of transport devices and finally arrives at the coiling drum. Inside the coiling drum, the wire is vertically coiled in a specific direction to form a tight coil for subsequent transfer and storage.

[0004] In the production process of coils, heat dissipation is an indispensable step, which plays a crucial role in ensuring the quality and performance of steel. However, the currently widely used natural wind cooling method is not ideal. In hot summers or in environments with low wind speeds, the effect of natural wind cooling is greatly reduced, making it difficult to quickly lower the internal temperature of the coil. This may lead to adverse conditions such as stress concentration and changes in the microstructure of the steel, which in turn affect the subsequent processing performance and product quality of the steel. Summary of the Invention

[0005] This device provides a roller conveyor-type wire collection, conveying, and cooling system, the specific implementation of which is as follows:

[0006] A roller conveyor wire collection, conveying and cooling system includes:

[0007] Vertically arranged collecting drums and lifting platforms, both with coil lifting machines on their sides, and a core frame slidingly fitted on the lifting platform. After the coil is released from the bottom of the collecting drum, it is buffered and falls onto the core frame under the action of the coil lifting machine.

[0008] The conveying roller path used for translating and conveying the core frame consists of a closed loop roller path consisting of a coil input roller path and a core frame recovery roller path. The junction of the two is provided with a turning table to flip the core frame with coils for discharge. The output end of the turning table is equipped with a conveying trolley, and a rotating table is provided at each bend of the conveying roller path.

[0009] The collecting drum includes a feeder and a nose cone located in the middle of the feeder. Between the two is a fabric space where the wire is wound into a roll, and a separation claw driven by a second geared motor is provided at the bottom of the fabric space.

[0010] The inside of the winding drum is also equipped with a cooling component, which includes a fan and a conveying pipe connected to the output end of the fan. The end of the conveying pipe is connected to the side of the fabric space along the tangent of the winding drum, and the cooling component provides real-time cooling for the coiled wire.

[0011] Based on the above technical solution, the nose cone is a welded conical barrel structure with detachable strip-shaped wear-resistant plates on the cone surface. When the winding drum is winding, the core frame is raised by the lifting platform, and the nose cone is supported by the top of the core frame. After winding is completed, the nose cone is temporarily supported by the separating claw.

[0012] Preferably, the fabric distributor is mounted on the slewing bearing of the collecting drum and is connected to the fabric distributor via a first geared motor, gears, and a gear ring structure.

[0013] Preferably, the bottom of the winding drum is provided with a number of limiting slide rods that slide radially. Each limiting slide rod is equidistant along the circumference and also slides in conjunction with an arc-shaped separating claw. Each limiting slide rod is connected to the output end of the second reduction motor via a pull rope. The top of the winding drum is provided with a fifth grating to detect whether the tail of the winding is in place, and the bottom of the drum is provided with a sixth proximity switch.

[0014] Based on the above technical solutions, the fabric feeder can effectively adjust the shape of the wire roll, making the wire roll more aesthetically pleasing and neat, while also effectively shortening the length of the wire roll after packaging; the grating detects the height of the wire roll in the winding drum and the tail of the coil, providing a signal for automatically opening the separation claw; the third proximity switch detects that the separation claw is in the open / closed position.

[0015] Preferably, the lifting platform includes a hydraulic lifting platform and a first roller belt located at its lifting output end, the core frame is slidably connected to the first roller belt, and a first pneumatic gripper acting on the core frame is provided at the roller gap of the first roller belt.

[0016] Preferably, the hydraulic lifting platform has a first grating and a second grating of different heights mounted on its side via vertical mounting rods, and the hydraulic lifting platform is provided with a first proximity switch for detecting whether the output end has been raised.

[0017] Based on the above technical solution, the first roller belt consists of a fixed roller and a movable roller. The drive motor of the first roller belt drives the fixed roller to rotate through a chain, thereby moving the core frame. The movable roller has no power and is fixed to the top of the hydraulic lifting platform. When the hydraulic lifting platform rises, it lifts the core frame. The hydraulic lifting platform consists of a hydraulic cylinder, an inner mandrel, and an outer fixed cylinder. The hydraulic cylinder provides the lifting power. There are three slides on the outside of the inner mandrel, and guide wheels inside the outer fixed cylinder to guide the lifting of the inner mandrel. The first pneumatic gripper is used to clamp the core frame when it is on the lifting platform, aligning the core frame with the center of the winding drum, and preparing for the subsequent lifting device to rise.

[0018] Preferably, the coil lifting machine consists of a drive and a brake. The drive is connected to a vertically lifting platform via a chain, and the lifting platform is equipped with a retractable coil-holding fork.

[0019] Preferably, the drive is equipped with an encoder, and the lifting platform is equipped with a second proximity switch for detecting whether the coil fork is extended.

[0020] Based on the above technical solution, the coil fork is extended / retracted by a hydraulic cylinder. When extended, it catches the coil that falls after the separating claw opens. When retracted, it drops the coil onto the core frame. The chain drives the lifting platform to rise and fall via a driver. The lifting platform is supported by a counterweight through a pulley structure, ensuring that the driver operates under the same load during both rising and falling.

[0021] Preferably, the rotary table includes a rotary drive structure and a second roller belt located at the output end of the rotary drive structure. The second roller belt is provided with a second pneumatic gripper that acts on the core frame. A third proximity switch is provided at the end of the rotation trajectory of the second roller belt, and a third grating for positioning reminder is provided at the front end of the second roller belt.

[0022] Based on the above technical solutions, the second pneumatic gripper is used to clamp the core frame when it is on the rotary table, so that the core frame will not shake due to centrifugal force during rotation; the rotation drive structure is powered by a hydraulic cylinder to drive the roller on the slewing bearing to rotate / revolve 90°, and the proximity switch detects that the roller is in the forward / reverse 90° position.

[0023] Preferably, the turning table includes a tilting structure and a third roller belt located at the output end of the tilting structure. The third roller belt is provided with a locking clamp that acts on the core frame, and the reversal center of the third roller belt is located on its side. The locking clamp includes a third pneumatic gripper and a lifting member located at the bottom of the third roller belt, as well as a hydraulic gripper located on the side of the third roller belt.

[0024] Preferably, the third roller belt is provided with a fourth grating for detecting the position of the core frame, a fifth proximity switch for detecting the state of the tilting structure, and a fourth proximity switch for detecting the action state of the hydraulic gripper.

[0025] Based on the above technical solution, the hydraulic grippers have four clamps to firmly fix the core frame to the tilting device during the tilting process. The tilting structure is powered by a hydraulic cylinder to rotate the core frame fixed on the roller conveyor by 90°. The core frame adopts an existing variable-diameter roller conveyor type traveling core frame, whose telescopic mechanism can control the synchronous movement of the mandrel. When the mandrel retracts, it facilitates the smooth loading of the wire coil onto the core frame. When the mandrel expands, it supports the wire coil, ensuring that the wire will not loosen during movement, and has extremely high stability and fixation. During retraction, a winding trolley is used to transfer the wire to the PF wire C-hook. Due to the retraction of the mandrel, the gap between the mandrel and the inner coil of the wire coil is increased, reducing scratches on the wire. This lifting component is powered by a hydraulic cylinder. After the core frame on the roller conveyor rotates 90 degrees, the hydraulic cylinder extends and presses against the core frame, causing this type of core frame to retract.

[0026] In summary, this application includes the following beneficial technical effects:

[0027] 1. This invention, by installing proximity switches and light gratings on the lifting platform, turning platform, collecting drum, rotating platform, and coil lifting machine, realizes the positioning reminder of the core frame and the detection of whether each mechanism has acted in place, thus realizing the fully automatic and unmanned operation of the system;

[0028] 2. The present invention has a simple structure, with cooling components arranged circumferentially inside the drum, integrating wire winding and cooling into one unit, thus achieving a highly efficient cooling effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 is a schematic diagram of the structure of the present invention;

[0031] Figure 2 is a cross-sectional view of the lifting platform structure in this invention from the front view.

[0032] Figure 3 is a top view of the lifting platform in this invention;

[0033] Figure 4 is a structural schematic diagram of the coil hoist in this invention;

[0034] Figure 5 is a schematic diagram of the structure of the collection drum in this invention;

[0035] Figure 6 is a top view of the top-view cross-sectional view of the roller structure in this invention;

[0036] Figure 7 is a cross-sectional view of the top view structure of the roller in this invention;

[0037] Figure 8 is a front view of the rotating platform in this invention.

[0038] Figure 9 is a top view of the rotating platform in this invention.

[0039] Figure 10 is a cross-sectional view of the rotary table structure in this invention;

[0040] Figure 11 is a side view of the turning table in this invention.

[0041] Figure 12 is a schematic diagram of the right-side structure of the turning table in this invention.

[0042] Explanation of reference numerals in the attached drawings: 1. Lifting platform; 2. Tilting platform; 3. Winding drum; 4. Rotary table; 5. Core frame; 6. Coil lifting machine; 7. Coil input roller path; 8. Core frame recovery roller path; 9. Coil transport vehicle; 101. First roller belt; 102. Vertical mounting rod; 103. Hydraulic lifting platform; 104. First pneumatic gripper; 105. First proximity switch; 106. First grating; 107. Second grating; 201. Third roller belt; 203. Third pneumatic gripper; 204. Hydraulic gripper; 205. Tilting structure; 206. Lifting component; 207. Fourth proximity switch; 208. Fifth proximity switch; 209. Fourth grating; 301. Nose cone; 302. Fabric distributor; 303. First decelerator. 304 Motor, Separating Claw, 305 Second Gear Motor, 306 Cooling Component, 307 Fifth Optical Grating, 308 Sixth Proximity Switch, 401 Second Roller Belt, 402 Roller Drive Motor, 403 Second Pneumatic Gripper, 404 Rotary Drive Structure, 405 Third Proximity Switch, 406 Third Optical Grating, 601 Driver, 602 Lifting Platform, 603 Coil Carrying Fork, 604 Chain, 605 Counterweight, 606 Encoder, 607 Second Proximity Switch, 3031 Gear, 3032 Gear Ring, 3051 Pull Rope, 3052 Limiting Slide Rod, 3061 Conveying Pipe. Detailed Implementation

[0043] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0044] It should be noted that the structures, proportions, sizes, etc. illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0045] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0046] The present application will be further described in detail below with reference to Figures 1-12.

[0047] This application discloses a roller conveyor cooling system for collecting, transporting, and cooling wires.

[0048] Example 1

[0049] Referring to Figures 1 to 12, this embodiment discloses a roller conveyor cooling system for collecting, transporting, and cooling wires. It includes a vertically arranged collecting drum 3, a lifting platform 1, and a conveying roller path for translating and transporting a core frame 5. The system is a closed-loop roller path formed by a coil input roller path 7 and a core frame recovery roller path 8. A turning platform 2 is provided at the junction of the two to flip and discharge the core frame 5 with coils. A coil transport vehicle 9 is provided at the output end of the turning platform 2. A rotating platform 4 is provided at the bend of the conveying roller path. In this structure, a coil lifting machine 6 is provided on the side of the collecting drum 3 and the lifting platform 1. The core frame 5 is slidably fitted on the lifting platform 1.

[0050] The winding drum 3 includes a fabric feeder 302 and a nose cone 301 located in the middle of the fabric feeder 302. Between the two is a fabric space where the wire is wound into a roll. The bottom of the fabric space is provided with a separation claw 304 driven by a second reduction motor 305. In this structure, the inner side of the winding drum 3 is also provided with a cooling component 306, which includes a fan and a conveying pipe 3061 connected to the output end of the fan. The end of the conveying pipe 3061 is connected to the side of the fabric space along the tangential direction of the winding drum 3. The cooling component 306 provides real-time cooling for the wound wire. The fabric space is set as a vertical equal diameter shape. Its interior adopts a virtual and solid structure. The virtual part is composed of a hollow mesh, that is, the upper part of the equal diameter structure is a hollow mesh. The overall winding drop space is equal diameter. The airflow channel is equal diameter at the top and necked at the bottom. The input end of the conveying pipe 3061 is introduced tangentially from the equal diameter part at the top. The cyclone separation structure realizes both winding heat dissipation and internal dust cleaning.

[0051] The fabric feeder 302 is mounted on the slewing support of the winding drum 3. It is connected to the fabric feeder 302 through a structure of first reduction motor 303, gear 3031 and gear ring 3032. In this structure, several limiting slide rods 3052 are radially slidably provided at the bottom of the winding drum 3. Each limiting slide rod 3052 is equidistantly arranged in the circumferential direction, and each limiting slide rod 3052 is also slidably engaged with the arc-shaped separating claw 304. Each limiting slide rod 3052 is connected to the output end of the second reduction motor 305 through a pull rope 3051. The top of the winding drum 3 is provided with a fifth grating 307 to detect whether the tail of the coil is in place, and the bottom of the winding drum 3 is provided with a sixth proximity switch 308. The length of the coil inside the winding drum 3 is detected by the fifth grating 307. The coil lifting machine 6 descends at a uniform speed, ensuring that the coil is always coiled inside the winding drum 3. The fabric feeder 302 rotates at a uniform speed. All of the above ensures that the appearance of the coil is neat and improves the appearance quality of the product.

[0052] Example 2

[0053] Referring to Figures 2 to 4, and based on the above embodiments, this embodiment also provides a roller conveyor cooling system for collecting, transporting, and cooling wires. The lifting platform 1 includes a hydraulic lifting platform 103 and a first roller belt 101 located at its lifting output end. The core frame 5 is slidably connected to the first roller belt 101, and a first pneumatic gripper 104 acting on the core frame 5 is provided at the roller gap of the first roller belt 101. In this structure, the side of the hydraulic lifting platform 103 is respectively equipped with a first grating 106 and a second grating 107 of different heights via a vertical mounting rod 102. The side of the hydraulic lifting platform 103 is provided with a first proximity switch 105 for detecting whether the output end has been raised.

[0054] The coil lifting machine 6 consists of a driver 601 and a brake. The driver 601 is connected to the vertically lifting platform 602 via a chain 604. The lifting platform 602 is equipped with a counterweight 605 and a retractable coil support fork 603. In this structure, the driver 601 is equipped with an encoder 606, and the lifting platform 602 is equipped with a second proximity switch 607 for detecting whether the coil support fork 603 is extended. Through the combined use of the coil lifting machine 6 and the lifting platform 1, the displacement of the coil core frame 5 falling from the coil drum 3 onto the lifting platform 1 is divided into multiple segments, thereby reducing the impact force generated by the vertical fall of the coil. The first proximity switch 105 and the second proximity switch 607 enable real-time detection of the operating status of the hydraulic lifting platform 103 and the coil support fork 603.

[0055] Example 3

[0056] Referring to Figures 8 to 10, and based on the above embodiments, this embodiment also provides a roller conveyor cooling system for collecting, transporting, and cooling wires. The rotary table 4 includes a rotary drive structure 404 and a second roller belt 401 located at the output end of the rotary drive structure 404. The second roller belt 401 is provided with a second pneumatic gripper 403 that acts on the core frame 5. In this structure, a third proximity switch 405 is provided at the end of the rotation trajectory of the second roller belt 401, and a third grating 406 for positioning reminder is provided at the front end of the second roller belt 401. In this structure, the second roller belt 401 is connected to a roller drive motor 402 via a transmission link.

[0057] Example 4

[0058] Referring to Figures 11 and 12, and based on the above embodiments, referring to Figures 1 to 8, and based on the above embodiments, this embodiment also provides a roller conveyor type wire collection, conveying, and cooling system. The turning table 2 includes a tilting structure 205 and a third roller belt 201 disposed at the output end of the tilting structure 205. The third roller belt 201 is provided with a locking clamp acting on the winding core frame 5, and the reversal center of the third roller belt 201 is located on its side. The locking clamp includes a third pneumatic gripper 203 disposed at the bottom of the third roller belt 201 and a lifting member 206, so as to... The structure includes a hydraulic gripper 204 located on the side of the third roller belt 201. In this structure, the third roller belt 201 is equipped with a fourth grating 209 for detecting the position of the core frame 5, a fifth proximity switch 208 for detecting the state of the tilting structure 205, and a fourth proximity switch 207 for detecting the action state of the hydraulic gripper 204. By placing the fourth proximity switch 207 on the push-out position of the hydraulic gripper 204 and placing the fifth proximity switch 208 on the 90-degree tilting position of the tilting structure 205, real-time detection of the states of both is achieved.

[0059] The specific implementation process is as follows: When the wire rod is transported from the loose coil conveyor to the coiling drum 3, the proximity switch on the adjustable track at the end of the loose coil cooling conveyor detects the coil entering the coiling drum 3 and sends a signal for the gap between the steel billets; at this time, during the coiling process, the empty core frame enters the lifting platform 1, the first pneumatic gripper 104 of the lifting platform 1 clamps the core frame 5 and begins to rise; when the nose cone 301 is lifted by the core frame 5 on the lifting platform, the separating claw 304 begins to open; the coil falls through the coiling drum 3 onto the coil lifting machine 6 and is supported by the coil lifting machine 6 and falls onto the core frame 5.

[0060] After the core roll 5 enters the turning table 2, the third pneumatic gripper 203 clamps it, the hydraulic gripper 204 locks it, the tilting structure 205 drives the core roll 5 to rotate 90 degrees, the cylinder-type lifting component 206 retracts the core roll 5, and the transport trolley 9 transfers the coil from the core roll 5 to the C-hook of the PF line; the tilting structure 205 flips back, the third pneumatic gripper 203 and the hydraulic gripper 204 open, and the core roll 5 drives out of the turning table 2; then the core roll 5 moves to the lifting table 1 to start the next cycle.

[0061] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A roller conveyor type wire collection, conveying and cooling system, characterized in that, include: The vertically arranged collecting drum (3) and lifting platform (1) are equipped with a coil lifting machine (6) on their sides. The lifting platform (1) is slidably fitted with a core frame (5). After the coil is released from the bottom of the collecting drum (3), it is buffered and falls onto the core frame (5) under the action of the coil lifting machine (6). The conveying roller path used for translating and conveying the core frame (5) consists of a closed loop roller path formed by a coil input roller path (7) and a core frame recovery roller path (8). The boundary between the two is provided with a turning table (2) for turning the core frame (5) with coils over to discharge the material. The output end of the turning table (2) is equipped with a coil transport vehicle (9), and a rotating table (4) is provided at the bend of the conveying roller path. The collecting drum (3) includes a fabric feeder (302) and a nose cone (301) located in the middle of the fabric feeder (302). Between the two is a fabric space for the wire to be coiled into a roll. The bottom of the fabric space is provided with a separation claw (304) driven by a second reduction motor (305). The wire coiling is cooled down through open transport. The inner side of the collecting drum (3) is also provided with a cooling assembly (306), which includes a fan and a conveying pipe (3061) connected to the output end of the fan. The end of the conveying pipe (3061) is connected to the side of the fabric space along the tangent of the collecting drum (3), and the cooling assembly (306) provides real-time cooling for the coiled wire. The fabric feeder (302) is mounted on the slewing support of the collecting drum (3) and is connected to the fabric feeder (302) through a structure of first reduction motor (303), gear (3031) and gear ring (3032); The bottom of the collecting drum (3) is provided with a plurality of limiting slide rods (3052) that slide radially. Each limiting slide rod (3052) is equidistantly arranged in the circumferential direction, and each limiting slide rod (3052) also slides in conjunction with the arc-shaped separating claw (304). Each limiting slide rod (3052) is connected to the output end of the second reduction motor (305) through a pull rope (3051). The top of the collecting drum (3) is provided with a fifth grating (307) for detecting whether the tail of the coil is in place, and the bottom of the drum is provided with a sixth proximity switch (308). The coil lifting machine (6) consists of a driver (601) and a brake. The driver (601) is connected to a vertically lifting platform (602) via a chain (604). The lifting platform (602) is equipped with a retractable coil holding fork (603).

2. The roller conveyor wire collection, conveying and cooling system according to claim 1, characterized in that, The lifting platform (1) includes a hydraulic lifting platform (103) and a first roller belt (101) located at its lifting output end. The core frame (5) is slidably connected to the first roller belt (101), and a first pneumatic gripper (104) acting on the core frame (5) is provided at the roller gap of the first roller belt (101).

3. The roller conveyor wire collection, conveying and cooling system according to claim 2, characterized in that, The hydraulic lifting platform (103) has a first grating (106) and a second grating (107) of different heights installed on its side via a vertical mounting rod (102). The hydraulic lifting platform (103) is provided with a first proximity switch (105) for detecting whether the output end has been raised.

4. The roller conveyor wire collection, conveying and cooling system according to claim 3, characterized in that, The driver (601) is equipped with an encoder (606), and the lifting platform (602) is equipped with a second proximity switch (607) for detecting whether the roll-holding fork (603) is extended.

5. A roller conveyor wire collection, conveying, and cooling system according to claim 4, characterized in that, The rotary table (4) includes a rotary drive structure (404) and a second roller belt (401) located at the output end of the rotary drive structure (404). The second roller belt (401) is provided with a second pneumatic gripper (403) that acts on the core frame (5). A third proximity switch (405) is provided at the end of the rotation trajectory of the second roller belt (401), and a third grating (406) for positioning reminder is provided at the front end of the second roller belt (401).

6. The roller conveyor wire collection, conveying and cooling system according to claim 1, characterized in that, The turning table (2) includes a tilting structure (205) and a third roller belt (201) located at the output end of the tilting structure (205). The third roller belt (201) is provided with a locking clamp that acts on the core frame (5), and the reversal center of the third roller belt (201) is located on its side. The locking clamp includes a third pneumatic gripper (203) located at the bottom of the third roller belt (201), a lifting member (206), and a hydraulic gripper (204) located on the side of the third roller belt (201).

7. A roller conveyor wire collection, conveying, and cooling system according to claim 6, characterized in that, The third roller belt (201) is provided with a fourth grating (209) for detecting the position of the core frame (5), and also with a fifth proximity switch (208) for detecting the state of the tilting structure (205) and a fourth proximity switch (207) for detecting the action state of the hydraulic gripper (204).

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