Anti-pinch device for thimble of rewinding machine

Abstract

The utility model discloses an anti-pinch device for an ejector pin of a rewinding machine, relates to the technical field of papermaking, and aims to solve the problem of hand pinching accidents. The anti-pinch device for the ejector pin of the rewinding machine comprises a rack, and a backing paper roller, the ejector pin, a sensor assembly and a controller which are fixed on the rack, the rack comprises an external cross beam and an ejector pin driving structure, and the ejector pin driving structure is connected with the controller; the backing paper rollers comprise the first backing paper roller and the second backing paper roller, the first backing paper roller is fixed to the portion, close to the external cross beam, of the rack, and the second backing paper roller is fixed to the portion, away from the external cross beam, of the rack. The ejector pin is fixed to the portion, between the first backing paper roller and the second backing paper roller, of the ejector pin driving structure. The sensor assembly is fixed to the portion, close to the external cross beam, of the rack and connected with the controller, a sensor of the sensor assembly is used for sending a detection signal to the controller, and the controller is used for receiving the detection signal and controlling the ejector pin driving structure to drive the ejector pin to move or stop moving according to the detection signal.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking, in particular to a hand-pinching prevention device for an ejector pin of a rewinding machine. Background Art

[0002] The paper rewinder is an important piece of equipment in the papermaking process, used to roll pulp into paper rolls. However, during the operation, especially when replacing the paper core, the workers' hands need to frequently go in and out of the machine to replace the paper core, which can easily lead to the risk of being pinched. Summary of the invention

[0003] The utility model aims to provide a rewinding machine ejector pin anti-hand pinching device for preventing hand pinching accidents.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A rewinder ejector pin hand pinching prevention device comprises: a frame, and a bottom paper roller, an ejector pin, a sensor assembly and a controller fixed on the frame;

[0006] The frame includes an external crossbeam and an ejector drive structure, and the ejector drive structure is connected to the controller;

[0007] The bottom paper roller comprises a first bottom paper roller and a second bottom paper roller, wherein the first bottom paper roller is fixed to a portion of the frame close to the external cross beam, and the second bottom paper roller is fixed to a portion of the frame far from the external cross beam;

[0008] The ejector pin is fixed to a portion of the ejector pin driving structure between the first bottom paper roller and the second bottom paper roller;

[0009] The sensor assembly is fixed to a portion of the frame close to the external crossbeam, and the sensor assembly is connected to the controller. The sensor of the sensor assembly is used to send a detection signal to the controller, and the controller is used to receive the detection signal and control the ejector drive structure to drive the ejector to move or stop moving according to the detection signal.

[0010] Compared with the prior art, in the anti-pinch finger device for the ejector of the rewinding machine provided by the utility model, a sensor component and a controller connected to the sensor component are arranged, and the sensor component is fixed at a position of the frame close to the external crossbeam, so that when the sensor component detects that an operator is working in the detection area, a detection signal can be sent to the controller, and the controller controls the ejector drive structure to drive the ejector to a state of stopping working, so as to prevent the occurrence of finger pinching accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0012] Figure 1 A schematic structural diagram of a rewinding machine ejector anti-pinch device according to an exemplary embodiment of the utility model is shown;

[0013] Figure 2 A left side view of the connection between the sensor assembly and the external beam provided by an exemplary embodiment of the present invention is shown;

[0014] Figure 3 A schematic structural diagram of a sensor fixing structure provided by an exemplary embodiment of the utility model is shown.

[0015] Reference numerals:

[0016] 100-rewinder ejector anti-pinch device; 110-frame; 111-external beam; 112-ejector drive structure; 120-bottom paper roller; 121-first bottom paper roller; 122-second bottom paper roller; 130-ejector; 140-sensor assembly; 141-sensor fixing structure; 1411-fixing part; 1412-telescopic part; 142-sensor; 143-bottom plate; 1431-movable groove; 144-first fixing part; 145-second fixing part; 1451-matching part; 1452-movable rod; 1453-baffle; 1454-elastic part; 146-first movable space; 147-second movable space. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] The paper rewinder is an important equipment in the papermaking process, which is used to roll pulp into paper rolls. During operation, especially during the paper core replacement process, the operator's hands need to frequently enter and exit the machine, which may cause the operator to be pinched. The pinching not only affects the operator's health, but also may affect production efficiency. Therefore, it is necessary to develop a device that can effectively prevent pinching.

[0023] The inventors found that currently, physical structures are mainly relied on to prevent hand pinching accidents, such as swing rods, limit bolts and blocking rods. The reliability, durability and maintenance requirements of these mechanical parts are relatively high. Once a failure or wear occurs, the anti-pinch device may fail, increasing the risk of injury to the operator. And because the physical structure needs to be adjusted and maintained regularly to ensure its normal operation and effectiveness, additional operating and maintenance costs will be added, and corresponding technical knowledge and manpower investment are required. Based on this, although the use of physical structures can provide certain anti-pinch protection, it cannot completely eliminate the possibility of human operating errors. For example, the operator may violate safety regulations due to negligence, fatigue or other reasons and place his hands in a dangerous area. In this case, the simple physical structure protection may not be able to prevent the occurrence of hand pinching accidents in time. Finally, the application scope of the physical structure is narrow and can only be applied to specific types of papermaking rewinders. For different types of machines or specific working conditions, corresponding adjustments or improvements may be required.

[0024] In order to overcome the above problems, an embodiment of the utility model provides a rewinding machine ejector anti-pinch device. By setting a sensor and a controller matching the sensor, when the sensor detects the presence of an operator, the detection result can be sent to the controller, and the controller controls the ejector drive structure according to the detection result, so that the ejector is always in a stopped state to prevent the occurrence of finger pinching accidents caused by the advancement of the ejector.

[0025] Figure 1 The structure diagram of the anti-pinch device for the ejector pin of the rewinding machine according to the exemplary embodiment of the utility model is shown. Figure 1 As shown, the rewinder ejector finger-pinching prevention device 100 comprises: a frame 110, and a bottom paper roller 120, an ejector 130, a sensor assembly 140 and a controller (not shown in the figure) fixed on the frame 110.

[0026] like Figure 1 As shown, the frame 110 includes an external crossbeam 111 and an ejector drive structure 112. The ejector drive structure 112 is connected to a controller and is used to control the working state of the ejector drive structure 112 under the control of the controller, so that when the controller determines that the ejector drive structure 112 should be in a stopped working state, even if the operator turns the control knob of the ejector drive structure 112 located on the control panel, the ejector drive structure 112 is still in a stopped working state to ensure the safety of the operator.

[0027] like Figure 1As shown, the bottom paper roller 120 includes a first bottom paper roller 121 and a second bottom paper roller 122. The first bottom paper roller 121 is fixed to a portion of the frame 110 close to the external cross beam 111, that is, close to the operator. The second bottom paper roller 122 is fixed to a portion of the frame 110 away from the external cross beam 111, that is, away from the operator. In order to ensure that the first bottom paper roller 121 and the second bottom paper roller 122 can move relative to each other, there is a gap between the first bottom paper roller 121 and the second bottom paper roller 122.

[0028] like Figure 1 As shown, since the paper core for rolling paper is located between the first bottom paper roller 121 and the second bottom paper roller 122, the ejector pin 130 is fixed to the portion of the ejector pin driving structure 112 located between the first bottom paper roller 121 and the second bottom paper roller 122, so that the ejector pin 130 can push the multiple paper cores located between the first bottom paper roller 121 and the second bottom paper roller 122, so that the multiple paper cores can be in close contact, so as to facilitate the subsequent paper rolling operation. It should be understood that the connection between the controller of the utility model and the ejector pin driving structure 112 and the sensor assembly 140 can be a communication connection or an electrical connection, and is not limited thereto.

[0029] like Figure 1 As shown, when the operator places the paper core between the first bottom paper roller 121 and the second bottom paper roller 122, the operator usually operates at a position close to the external cross beam 111 of the frame 110, so the sensor assembly 140 is fixed at a position close to the external cross beam 111 of the frame 110, so that the detection range of the sensor assembly 140 can cover the operator's operation area. The sensor assembly 140 is connected to the controller, and the sensor of the sensor assembly is used to send a detection signal to the controller, and the controller is used to receive the detection signal and control the ejector drive structure to drive the ejector to move or stop moving according to the detection signal. It should be understood that the controller can be located in the control box of the ejector anti-pinch device of the rewinder, and a control panel is provided on the surface of the control box. The operator can control the movement of the ejector 130 through the knob on the control panel.

[0030] From the above, it can be seen that in the anti-pinch finger device for the rewinding machine ejector provided by the utility model, a sensor component and a controller connected to the sensor component are arranged, and the sensor component is fixed at a position of the frame close to the external crossbeam, so that when the sensor component detects that an operator is working in the detection area, a detection signal can be sent to the controller, and the controller controls the ejector drive structure to drive the ejector to a state of stopping working, so as to prevent the occurrence of finger pinching accidents.

[0031] As a possible implementation, Figure 1As shown, the sensor assembly 140 may include a sensor fixing structure 141 and a sensor 142 connected to the sensor fixing structure 141, so that the sensor 142 can be fixed at a preset position by the sensor fixing structure 141. In this case, the sensor fixing structure 141 can be fixed on the external beam 111, or it can be fixed on other parts of the frame 110, and the sensor 142 is connected to the controller. It should be understood that the sensor 142 here can be a photoelectric sensor, a microwave sensor, a millimeter wave sensor, etc., but is not limited thereto. The sensors 142 and other equipment used in the utility model are all commercially available products, and their product models and manufacturers are not limited here.

[0032] In actual applications, due to differences in the heights of operators and the height differences of external beams of different equipment, the detection area of ​​the sensor is offset from the actual working area of ​​the operator, which may cause the recurrence of hand pinching accidents.

[0033] In order to overcome the above problems, Figure 2 FIG. 2 shows a left side view of the sensor assembly and the external beam connection provided by an exemplary embodiment of the present utility model. Figure 2 As shown, there is an angle between the extension direction of the sensor assembly 140 and the direction perpendicular to the extension direction of the external beam 111, so that the sensor assembly 140 can rotate along a preset direction to adjust the detection area of ​​the sensor 142 included in the sensor assembly 140 to avoid finger pinching accidents.

[0034] As a possible implementation, Figure 2 As shown, since the operator's operating area is between the first bottom paper roller 121 and the second bottom paper roller 122, the angle between the extension direction of the above-mentioned sensor assembly 140 and the direction perpendicular to the extension direction of the external beam 111 is 0°~90°, that is, greater than 0°<∠α<90°, to ensure that the sensor assembly 140 can detect in the upper area of ​​the first bottom paper roller 121 and the second bottom paper roller 122.

[0035] In some optional embodiments, in order to further improve the detection range of the sensor 142 of the present invention and to ensure the safety of the operator as much as possible, Figure 3 FIG. 1 is a schematic diagram showing a structure of a sensor fixing structure provided by an exemplary embodiment of the present utility model. Figure 3As shown, the sensor fixing structure 141 includes a fixing portion 1411 and a telescopic portion 1412. The sensor 142 is fixed on the fixing portion 1411. The fixing portion 1411 is rotatably connected to the telescopic portion 1412. The telescopic portion 1412 is detachably connected to the external beam 111. Specifically, the telescopic portion 1412 is rotatably connected to the external beam 111. The rotation angle can refer to the relevant description above. By setting a rotatable connection between the fixing portion 1411 and the telescopic portion 1412, it can be ensured that when the telescopic portion 1412 is rotated to a preset angle, the detection area of ​​the sensor 142 and the position of the sensor 142 can be adjusted by rotating the fixing portion 1411.

[0036] In practical applications, the fixed portion can be connected to the telescopic portion by bolts, and the angle between the fixed portion and the telescopic portion can be adjusted by adjusting the bolts. Of course, the fixed portion and the telescopic portion can also be connected in other rotational ways, and are not limited thereto.

[0037] In some alternatives, such as Figure 3 As shown, the rotation angle of the fixing portion 1411 can be 0° to 360°, that is, the fixing portion 1411 can be rotated in any direction by manual adjustment according to actual conditions to adjust the position of the sensor 142.

[0038] In practical applications, the sensor may be fixedly connected to the fixed part by means of bolts or the like, but bolts or the like connection methods may damage the surface of the sensor and have low replacement efficiency.

[0039] In order to overcome the above problems, the sensor of the utility model can be connected to the fixed part by clamping, which can ensure the integrity of the sensor on the one hand, and improve the efficiency of sensor disassembly on the other hand, and when the position of the sensor needs to be adjusted, the sensor position can be adjusted quickly.

[0040] In some alternatives, such as Figure 3 As shown, the fixing part 1411 may include a bottom plate 143, a first fixing member 144 and a second fixing member 145. The bottom plate 143 is rotatably connected to the telescopic part 1412. The first fixing member 144 is fixedly connected to the first end of the bottom plate 143. The second fixing member 145 is movably connected to the second end of the bottom plate 143, and the first end is opposite to the second end. By providing a second fixing member 145 that can be movably connected, the sensor 142 can be disassembled and the position adjusted by adjusting the range of motion of the second fixing member 145. It should be understood that the first end and the second end are opposite to each other, which means that the first fixing member 144 and the second fixing member 145 are respectively located on both sides of the bottom plate 143 to ensure that the first fixing member 144 and the second fixing member 145 can clamp the sensor 142.

[0041] In practical applications, such as Figure 3 As shown, a movable groove 1431 can be provided on the bottom plate 143, and the second fixing member 145 includes a matching member 1451 matching the first fixing member 144 and a movable rod 1452, the matching member 1451 is movably connected to the second end of the bottom plate 143, one end of the movable rod 1452 extends into the movable groove 1431, and the other end of the movable rod 1452 is fixed on the matching member 1451. It should be understood that the size of the matching member 1451 can be set according to the size of the sensor 142, for example, the size of the matching member 1451 can be the same as that of the first fixing member 144, or different from that of the first fixing member 144. Similarly, the shapes of the first fixing member 144 and the matching member 1451 can also be designed according to the shape of the sensor 142, for example, when the sensor 142 is cylindrical, the first fixing member 144 and the matching member 1451 can be provided with a corresponding curvature on the side in contact with the sensor 142 to ensure the clamping effect of the sensor 142. The movement of the matching member 1451 can be achieved by adjusting the depth of the movable rod 1452 extending into the movable groove 1431. There are many ways to adjust the movable rod 1452. There are many ways to fix the movable rod 1452 and the matching member 1451. For example, the movable rod 1452 can be fixedly connected to the matching member 1451 by threaded connection or by bolts, etc., which is not limited here.

[0042] For example, an internal thread is provided on the inner wall of the movable groove, and an external thread matching the internal thread is provided on the outer wall of the movable rod extending into the movable groove. The distance between the matching piece and the base plate can be adjusted by rotating the movable rod to achieve quick disassembly of the sensor.

[0043] For example, Figure 3 As shown, the second fixing member 145 may also include a baffle 1453 and an elastic member 1454, the baffle 1453 is connected to one end of the movable rod 1452 extending into the movable groove 1431, and is used to limit the range of motion of the movable rod 1452, and one end of the elastic member 1454 is fixed on the baffle 1453, and the other end is fixed in the movable groove 1431, so that the movable rod 1452 can move within a certain distance under the restriction of the elastic member 1454 and the baffle 1453. It should be noted that along the extension direction of the telescopic portion 1412, the size of the opening of the movable groove 1431 should be greater than the height of the movable rod 1452 and less than the height of the baffle 1453, so as to ensure that the baffle 1453 can limit the range of motion of the movable rod 1452, and the movable rod 1452 can move arbitrarily in the movable groove 1431 within a certain range. The elastic member 1454 can be a spring that can be elastically deformed when subjected to pressure, etc., which is not limited here.

[0044] In order to limit the range of motion of the movable rod, the movable groove can be set as a variable diameter movable groove. In this case, the height of the movable groove gradually decreases along the direction close to the second end of the bottom plate. The elastic member can be fixed on the inner wall of the movable groove, and the fixing method between the elastic member and the inner wall of the movable groove is not limited here.

[0045] Of course, if Figure 3 As shown, the above-mentioned movable groove 1431 may also include a first movable space 146 and a second movable space 147. In the direction perpendicular to the movement direction of the second fixing member 145, the height of the first movable space 146 is greater than the height of the second movable space 147, and the height of the first movable space 146 is greater than the height of the baffle 1453. At this time, the elastic member 1454 may be fixed between the second movable space 147 and the baffle 1453, and the baffle 1453 may move in the second movable space 147, thereby limiting the range of motion of the movable rod 1452. It should be understood that the length of the first movable space 146 and the length of the second movable space 147 may be set according to actual conditions, and no limitation is made here.

[0046] It can be known from the relevant description in the foregoing that the anti-pinch device for the rewinding machine ejector provided by the utility model can detect whether the operator is working in the operating area through a sensor. When the operator is working in the operating area, the sensor can send the detection result to the controller, and the controller controls the driver in the ejector drive structure to be in a stopped state according to the detection result, driving the ejector to stop advancing, so as to avoid the occurrence of finger pinching accidents.

[0047] As can be seen from the above, the utility model of the rewinding machine ejector anti-pinch hand device can effectively prevent the risk of the operator's hand being pinched and ensure the safety of the operator. At the same time, the device has a simple structure, is easy to use, safe and reliable, and has low maintenance costs, and is suitable for various types of paper rewinding machines.

[0048] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0049] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A rewinding machine ejector anti-pinch device, characterized in that: The rewinder ejector anti-pinch device comprises: a frame, and a bottom paper roller, an ejector, a sensor assembly and a controller fixed on the frame; The frame includes an external crossbeam and an ejector drive structure, and the ejector drive structure is connected to the controller; The bottom paper roller comprises a first bottom paper roller and a second bottom paper roller, wherein the first bottom paper roller is fixed to a portion of the frame close to the external cross beam, and the second bottom paper roller is fixed to a portion of the frame far from the external cross beam; The ejector pin is fixed to a portion of the ejector pin driving structure between the first bottom paper roller and the second bottom paper roller; The sensor assembly is fixed to a portion of the frame close to the external crossbeam, and the sensor assembly is connected to the controller. The sensor of the sensor assembly is used to send a detection signal to the controller, and the controller is used to receive the detection signal and control the ejector drive structure to drive the ejector to move or stop moving according to the detection signal.

2. The anti-pinch device for the ejector pin of the rewinding machine according to claim 1 is characterized in that: The sensor assembly includes a sensor fixing structure and a sensor connected to the sensor fixing structure; The sensor fixing structure is fixed on the external cross beam, and the sensor is connected to the controller.

3. The anti-pinch device for the ejector pin of the rewinding machine according to claim 1 is characterized in that: An angle is formed between an extending direction of the sensor assembly and a direction perpendicular to an extending direction of the external beam.

4. The anti-pinch device for the ejector pin of the rewinding machine according to claim 3 is characterized in that: The angle between the extending direction of the sensor assembly and the direction perpendicular to the extending direction of the external beam is 0° to 180°.

5. The anti-pinch device for the ejector pin of the rewinding machine according to claim 2, characterized in that: The sensor fixing structure comprises a fixing part and a telescopic part, the sensor is fixed on the fixing part, the fixing part is rotatably connected to the telescopic part, and the telescopic part is detachably connected to the external crossbeam.

6. The anti-pinch device for the ejector pin of the rewinding machine according to claim 5, characterized in that: The fixing part includes a bottom plate, a first fixing part and a second fixing part. The bottom plate is rotatably connected to the telescopic part. The first fixing part is fixedly connected to the first end of the bottom plate. The second fixing part is movably connected to the second end of the bottom plate. The first end is opposite to the second end.

7. The anti-pinch device for the ejector pin of the rewinding machine according to claim 6, characterized in that: A movable groove is provided on the bottom plate, and the second fixing member includes a matching member matching the first fixing member and a movable rod, the matching member is movably connected to the second end of the bottom plate, one end of the movable rod extends into the movable groove, and the other end of the movable rod is fixed on the matching member.

8. The anti-pinch device for the ejector pin of the rewinding machine according to claim 7, characterized in that: The second fixing member also includes a baffle and an elastic member. The baffle is connected to one end of the movable rod extending into the movable groove. One end of the elastic member is fixed to the baffle, and the other end is fixed in the movable groove.

9. The anti-pinch device for the ejector pin of a rewinding machine according to any one of claims 7 to 8, characterized in that: The movable groove is a variable diameter movable groove.

10. The anti-pinch device for the ejector pin of the rewinding machine according to claim 8, characterized in that: The movable groove includes a first movable space and a second movable space. In a direction perpendicular to the movement direction of the second fixing member, the height of the first movable space is greater than the height of the second movable space, and the height of the first movable space is greater than the height of the baffle.

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