System for repairing or replacing an edge cover of a fiber web manufacturing line

Abstract

System for repairing or replacing an edge cover (15) of a fiber web manufacturing line, comprising a rotary mechanism (10) for moving the edge cover (15) from an operating position to a maintenance position, wherein the rotary mechanism (10) is designed as a rotary lever mechanism comprising a fastening lever (16) to which the edge cover (15) is detachably attached, a rotary arm (17) which is pivotally attached at one end to the fastening lever (16) and at the other end pivotally by a joint (13a) to a support arm (13), a rotary plate (19) with a slot (19a) to which one end of the support arm (13) is attached, a support arm (14) to which the support arm (13) is attached, and a locking arm (18) for locking the rotary lever mechanism, wherein the edge cover (15) in its operating position is arranged in, on, or near a rotating coating roller (12, 11).to limit the coating width on the coating roller (12), the system further comprising a safety fence (20), wherein in the system the maintenance position into which the edge cover (15) is moved by the rotary mechanism (10) is adjacent to the safety fence (20), wherein the safety fence (20) is arranged such that the rotating part (12, 11), the nip (N) or the gap is outside the reach of a maintenance person who repairs or maintains the edge cover (15) that has been rotated into the maintenance position by the rotary mechanism (10), wherein in the system the distance between the maintenance position of the rotary mechanism (10) and the safety fence (20) is 10 mm - 500 mm, wherein in the system the distance between the safety tooth (20) and the rotating part (12, 11) or the nip (N) or the gap is at least 600 mm, preferably 850 mm - 1500 mm,and wherein the height of the safety fence (20) is 1000 mm - 1800 mm, preferably 1200 mm - 1600 mm, measured from a surface on which a person is standing when he or she is next to the safety fence.

Description

[0001] The invention relates to a system for repairing or replacing an edge cover of a fiber web manufacturing line.

[0002] As is known from the prior art in fiber web production, the processes typically have an arrangement formed by a multitude of devices arranged sequentially in the process line. A typical production and treatment line includes a headbox, a wire section, and a press section, as well as a subsequent drying section and a winder. The production and treatment line may also include other devices and sections for finishing the fiber web, e.g., a sizing press, a calender, and a coating section. The production and treatment line also typically includes at least one winder for forming customer rolls and a roll packaging device. In the different sections, orSections of the fiber web production and treatment line utilize rotating rollers and cylinders in multiple positions, and a nip or gap is often formed between the rotating rollers to process and treat the fiber web. In this description and the following claims, fiber webs refer, for example, to paper and cardboard webs.

[0003] In the areas of nips and gaps on fiber web production and processing lines, parts and components are often located that require maintenance, repair, or replacement, even while the fiber web is running. Repair work near these nips and gaps poses a safety risk to maintenance personnel, necessitating a halt to fiber web production or processing. In many cases, this requires cutting the web and re-feeding it after the repair or maintenance has been completed.

[0004] EP publication 1696075 describes a coating machine for applying a coating medium directly to the surface of a paper, cardboard, or other fiber web, or indirectly to the surface of a transfer element, such as an application roller, which transfers the coating medium to the surface of the fiber web. The machine includes a device for pivoting and adjusting a functional unit and a hydraulic cylinder for pivoting the functional unit into an operating or standby position and into a maintenance position. It is possible to set the operating or standby position with the hydraulic cylinder extended and the maintenance position with the cylinder retracted.One disadvantage of this type of known system is that maintenance and cleaning of the functional unit is difficult, especially when the fiber web is running, and this can also pose a safety risk, particularly when the machine is running, due to the unsafe arrangement of the functional unit in the maintenance position.

[0005] US Patent Publication 7029532 describes a coating station designed for coating a web with a coating material. The station comprises a load-bearing, transverse frame extending substantially across the entire width of the web, and coating elements attached to the frame. The frame is formed in a box-like structure by means of at least one transverse component made of sheet metal, which extends substantially across the entire width of the web and is attached to the end components by means of its end sections. The station further comprises two nozzle units with specific operating and maintenance positions. The maintenance position is located further from the web in the machine direction than the operating position.The nozzle unit can be serviced from the walkway even when the coating station is in use. A disadvantage of this known system is that maintenance can be complicated because the nozzle units are located above the machine even in the service position, and in some cases there is insufficient space for a safe walkway near the nozzle units.

[0006] From DE 693 00 096 T2, a beam for application in a glue press is known. A railing is provided on an operating platform for a person to hold, so that the person does not fall into a space between the operating platform and an application beam of the glue press.

[0007] One object of the invention is to create a system for repairing or replacing an edge cover of a fiber web production line, in which the disadvantages of the known systems relating to safety risks arising when parts or components near rotating rollers, in particular nips or gaps, of the fiber web production and treatment line are repaired or replaced are eliminated or at least minimized.

[0008] One objective of the invention is to provide a system for repairing or replacing an edge cover of a fiber web production line, which eliminates safety risks that arise when replacing or repairing parts or components of the fiber web production and treatment line near nips or gaps, particularly during times when the fiber web is running.

[0009] To solve the aforementioned problem, the system according to the invention is essentially characterized by the features of independent system claim 1.

[0010] According to the invention, the system for repairing or replacing a part or component of a fiber web production line has a rotary mechanism for moving the part or component of the fiber web production or treatment line to be repaired or replaced from an operating position to a maintenance position, wherein the part or component is arranged in its operating position in, on, or near a rotating roller, nip, or gap.The system further features a safety fence, in which the maintenance position into which the part or component is moved by the rotary mechanism is adjacent to the safety fence, and the safety fence is arranged such that the rotating part, nip or gap is outside the reach of a maintenance person who is repairing or servicing the part or component that has been rotated into the maintenance position by the rotary mechanism.

[0011] According to the invention, the distance between the maintenance position of the rotary mechanism and the safety fence is 10 mm to 500 mm. Preferably, the fence has an opening or openings for the maintenance person's hands, through which the maintenance or repair work can be carried out by the maintenance person. In the case where no openings for maintenance or repair work are provided, the distance is at least 40 mm.

[0012] Preferably, the distance and height of the fence are defined according to the instructions of the standard EN-ISO-13857.

[0013] According to the invention, the distance between the safety fence and the rotating part or the nip or the gap is at least 600 mm, preferably 850 mm - 1500 mm.

[0014] According to the invention, the height of the safety fence is 1000 mm - 1800 mm, preferably 1200 mm - 1600 mm, measured from a surface on which a person is standing when he or she is adjacent to the safety fence.

[0015] According to an advantageous feature of the system, the system can be operated manually and / or by an actuator.

[0016] The invention is described in more detail below with reference to the accompanying drawing, in which Fig. Figure 1 schematically shows an advantageous example of the invention.

[0017] The following refers to Fig.1 The invention is described with reference to an example of the maintenance or replacement of a format plate or edge cover 15, which is used to limit the coating width on a coating roller 12. The plate 15 is arranged in a nip N formed between the coating roller 12 and its counter roller 11. Replacing the plate 15 while the web W is running poses a significant safety risk because there is a possibility that a body part, for example a finger or hand, of the maintenance person could get caught in the nip N between the coating roller 12 and its counter roller 11.

[0018] The shield or cover 15 is attached to a rotary mechanism 10 for moving the shield 15 from a running or operating position, shown in the figure with solid lines, to a maintenance position, shown in the figure with dashed lines. In this case, the rotary mechanism 10 is a lever-operator mechanism 10, which in this example comprises a fastening lever 16 to which the cover is detachably attached, a pivot arm 17 which is attached at one end to the fastening lever 16 and at the other end pivotally by a joint 13a to a support arm 13, a rotating plate 19 with a slot 19a to which one end of the support arm 13 is attached, and a support arm 14 to which the support arm 13 is attached, and furthermore a locking arm 18 for locking the lever-operator mechanism 10 at the desired position, either in a running or operating position.The device has an operating position in which the shield 15 is located in the nip N between the rollers 12, 11, or a maintenance position in which the cover 15 is moved away from the nip N between the rollers 12, 11, or to a desired position in between. It is clear to a person skilled in the art that the rotary mechanism 10 can be designed in a variety of ways and can be operated manually or by an actuator.

[0019] For maintenance or replacement of the rotary lever mechanism 10, the shield 15 is rotated by the nip N into a maintenance position near a safety fence 20, which prevents the maintenance person from reaching the nip N between the rollers 12, 11.

[0020] Thus, according to the invention, the system comprises a rotary mechanism 10 for moving the part 15 or component of a fiber web production or treatment line requiring repair or replacement from an operating position to a maintenance position in the vicinity of a rotating roller 12, 11 or a nip N or a gap, and a safety tooth 20, wherein in the system the maintenance position generated by the rotary mechanism 10 is located adjacent to the safety fence 20 within the reach or access area of ​​the maintenance position, and the safety fence 20 is arranged such that the rotating part, the nip N or the gap is outside the reach of a maintenance person who is maintaining the part or component that has been rotated into the maintenance position by the rotary mechanism 10.Advantageously, the distance between the maintenance position of the rotary mechanism 10 and the safety fence 20 is 10 mm - 500 mm, and the distance between the safety fence 20 and the rotating part or the nip N or the gap is at least 600 mm, preferably 850 mm - 1500 mm, and the height of the safety fence 20 is 1000 mm - 1800 mm, preferably 1200 mm - 1600 mm, measured from a surface on which a person is standing when he or she is adjacent to the safety fence.

[0021] In addition to the example described above, the invention is suitable for many other positions or applications in a fiber web production and processing line for the maintenance of various different parts or components located near a rotating roller or cylinder, or a nip or gap near or at one or the other end of the roller or cylinder, or the nip or gap in the transverse direction of the fiber web. For example, it can involve the maintenance or replacement of a part or component of feed devices, edge collecting devices, roller or cylinder ends, skinning service devices, edge suction devices, edge cutting devices, foil setting devices, edge shower devices, etc.

Claims

[1] System for repairing or replacing an edge cover (15) of a fiber web manufacturing line, comprising a rotary mechanism (10) for moving the edge cover (15) from an operating position to a maintenance position, wherein the rotary mechanism (10) is designed as a rotary lever mechanism comprising a fastening lever (16) to which the edge cover (15) is detachably attached, a rotary arm (17) which is pivotally attached at one end to the fastening lever (16) and at the other end pivotally by a joint (13a) to a support arm (13), a rotary plate (19) with a slot (19a) to which one end of the support arm (13) is attached, a support arm (14) to which the support arm (13) is attached, and a locking arm (18) for locking the rotary lever mechanism, wherein the edge cover (15) in its operating position is arranged in, on, or near a rotating coating roller (12, 11). is,to limit the coating width on the coating roller (12), the system further comprising a safety fence (20), wherein in the system the maintenance position into which the edge cover (15) is moved by the rotary mechanism (10) is adjacent to the safety fence (20), wherein the safety fence (20) is arranged such that the rotating part (12, 11), the nip (N) or the gap is outside the reach of a maintenance person who repairs or maintains the edge cover (15) that has been rotated into the maintenance position by the rotary mechanism (10), wherein in the system the distance between the maintenance position of the rotary mechanism (10) and the safety fence (20) is 10 mm - 500 mm, wherein in the system the distance between the safety tooth (20) and the rotating part (12, 11) or the nip (N) or the gap is at least 600 mm, preferably 850 mm - 1500 mm,and wherein the height of the safety fence (20) is 1000 mm - 1800 mm, preferably 1200 mm - 1600 mm, measured from a surface on which a person is standing when he or she is next to the safety fence. [2] System according to claim 1, characterized by that the system can be operated manually and / or by an actuator.

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