Tension adjusting device of copper foil typesetting machine

Abstract

The utility model discloses a tension adjusting device of a copper foil typesetting machine. Comprising a rack and a winding and unwinding shaft where copper foil is wound, a first roller shaft is arranged on the rack, an installation rod is further connected to the rack through a bearing, connecting rods are fixedly connected to the installation rod, at least one second roller shaft capable of rotating is installed between the connecting rods, and the two ends of the installation rod are each fixedly connected with a pushing and pressing rod. Air cylinders are arranged at the positions, opposite to the two ends of the mounting rod, of the rack, and pushing heads of the air cylinders are hinged to the pushing and pressing rods. According to the utility model, the mounting rod and the connecting rod are rotated to form a certain angle and the second roll shaft is in a tilting state by combining the pushing force made by the cylinder and the outward pushing force given to the pushing and pressing rod all the time, and the cylinder can automatically return according to different external forces, so that the pushing and pressing can be realized by depending on the characteristic of the cylinder. And automatic tensioning adjustment exists in the copper foil tensioning state.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production equipment, in particular to a tension adjusting device for a copper foil typesetting machine. Background Art

[0002] As is well known, in the circuit board manufacturing process, that is, before the hydraulic pressure of the circuit board, it is necessary to typeset the copper foil (a consumable in the circuit board manufacturing process). During operation, a specific copper foil typesetting machine is used to typeset the copper foil, pull the copper foil out of the copper foil roll, and transmit it for subsequent processes. When pulling the copper foil out of the copper foil roll, the copper foil needs to be straightened to avoid sagging, which may cause wrinkles or subsequent processing of the copper foil. However, if it is straightened too much, it is easy to cause deformation or direct breakage of the copper foil. Therefore, it is necessary to provide a structure that can meet automatic tension adjustment to improve the processing work of the copper foil typesetting machine. Summary of the Utility Model

[0003] Aiming at the deficiencies existing in the above-mentioned prior art, the purpose of the utility model is to provide a tension adjusting device for a copper foil typesetting machine.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A tension adjusting device for a copper foil typesetting machine includes a frame and a winding and unwinding shaft on which the copper foil is wound. At least one rotatable first roller shaft is provided on the frame. The winding and unwinding shaft is rotatably placed on the frame. The winding and unwinding shaft is parallel to the first roller shaft. An installation rod is also connected to the frame through a bearing. At least two connecting rods are fixedly connected to the installation rod. At least one rotatable second roller shaft is installed between the two connecting rods. A push rod is fixedly connected to both ends of the installation rod. Cylinders are provided on the frame at positions corresponding to both ends of the installation rod. The pushing head of the cylinder is hinged to the push rod.

[0006] Preferably, four rotating blocks are installed on the frame through bearings. One end of the rotating block is provided with a cylindrical head. Taking two rotating blocks as a group, they are respectively located at both ends of the winding and unwinding shaft. The rotating blocks at the same position are flush with each other. And there is a placement gap between the cylindrical head of the rotating block and the cylindrical head of another rotating block. Circular heads are provided at both ends of the winding and unwinding shaft. The circular heads are placed in the placement gap.

[0007] Preferably, a first gear is provided at the other end of the rotating block opposite to the end provided with the cylindrical head. A driving motor is provided on the frame. A second gear is provided on the rotating head of the driving motor. The first gear and the second gear are connected by a chain.

[0008] Preferably, there are three first roller shafts and two second roller shafts. The two second roller shafts are located at the top and middle of the connecting rod. Two of the first roller shafts are flush with each other and located at the output port, and the height of the other first roller shaft is between the second roller shafts.

[0009] Due to the adoption of the above scheme, the present utility model combines the first roller shaft and the second roller shaft to satisfy the insertion of the copper foil, and the copper foil is guided by the first roller shaft and the second roller shaft. At the same time, combined with the thrust force set by the cylinder itself, a force that always pushes the push rod outwards is given, so that the mounting rod and the connecting rod rotate at a certain angle, making the second roller shaft in a tilted state. In this way, a tension force is given to the copper foil, and the cylinder can automatically retract according to different external forces. Therefore, relying on this characteristic of the cylinder, the tension state of the copper foil has automatic tension adjustment, so that when the copper foil is being guided, no matter how the pulling force changes, the copper foil can maintain a taut state. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0011] Figure 2 is a schematic structural diagram of the embodiment of the present utility model in another direction.

[0012] Figure 3 is a schematic structural diagram of the embodiment of the present utility model after the winding and unwinding shafts are separated.

[0013] Figure 4 is a schematic side view of the embodiment of the present utility model. Detailed Embodiment

[0014] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0015] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0016] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] As Figures 1 to 4 shown, a tension adjusting device of a copper foil typesetting machine provided in this embodiment includes a frame 1 and a winding and unwinding shaft 2 around which a copper foil is wound. At least one rotatable first roller shaft 3 is provided on the frame 1. The winding and unwinding shaft 2 is rotatably placed on the frame 1. The winding and unwinding shaft 2 and the first roller shaft 3 are parallel to each other. An installation rod 4 is also connected to the frame 1 through bearings. At least two connecting rods 5 are fixedly connected to the installation rod 4. At least one rotatable second roller shaft 6 is installed between the two connecting rods 5. A pushing rod 7 is fixedly connected to both ends of the installation rod 4. Cylinders 8 are provided on the frame 1 at positions corresponding to both ends of the installation rod 4. The pushing head of the cylinder 8 is hingedly connected to the pushing rod 7.

[0018] In this embodiment, the first roller shaft 3 and the second roller shaft 6 are combined to satisfy the threading of the copper foil, and the copper foil is fed by the first roller shaft 3 and the second roller shaft 6. At the same time, combined with the thrust force generated by the cylinder 8 itself, a force is continuously applied to push the push rod 7 outwards, causing the mounting rod 4 and the connecting rod 5 to rotate at a certain angle, making the second roller shaft 6 in a tilted state. In this way, a tension force is applied to the copper foil, and the cylinder 8 can automatically retract according to different external forces. Therefore, relying on this characteristic of the cylinder 8, the tension state of the copper foil has automatic tension adjustment, so that when the copper foil is fed, no matter how the pulling force changes, the copper foil can maintain a taut state.

[0019] When threading the copper foil, first draw the copper foil out from the winding and unwinding shaft 2, and then pass it through the first roller shaft 3 and the second roller shaft 6 in sequence. This embodiment does not limit whether to pass through the first roller shaft 3 or the second roller shaft 6 first, as long as the first roller shaft 3 and the second roller shaft 6 cross each other for transmission, that is, first wind around a certain roller shaft and then wind around another roller shaft until a connection is formed with the feeding port of the typesetting machine. During the process of the typesetting machine pulling the copper foil, according to different pulling forces or in the case of loose material, the cylinder adapts to this phenomenon. Specifically, when the pulling force of the copper foil is relatively large, the second roller shaft 6 will be pulled and move closer to the first roller shaft 3. At this time, the mounting rod 4 will be pulled to rotate counterclockwise, so that the push rod 7 presses against the pushing head of the cylinder 8 and retracts. When the pulling force becomes smaller or there is loose material, the restoring force of the cylinder 8 will retract the push rod 7, causing the mounting rod 4 to rotate clockwise and the second roller shaft 6 to gradually reset, so as to achieve automatic adjustment of the copper foil tension according to requirements.

[0020] Furthermore, to facilitate the quick placement and removal of the winding and unwinding shaft 2, four rotating blocks 9 are installed on the frame 1 through bearings. One end of the rotating block 9 is provided with a cylindrical head 91. Taking two rotating blocks 9 as a group, they are respectively located at both ends of the winding and unwinding shaft 2. The rotating blocks 9 at the same position are flush with each other, and there is an installation gap 100 between the cylindrical head 91 of one rotating block 9 and the cylindrical head 91 of another rotating block 9. The two ends of the winding and unwinding shaft 2 are provided with circular heads 21, and the circular heads 21 are placed in the installation gap 100. In this way, by relying on the gravity of the winding and unwinding shaft 2 itself and the clamping force of the cylindrical head 91, the placement of the winding and unwinding shaft 2 can be satisfied. Since there is no locking mechanism, when the winding and unwinding shaft needs to be removed, it can also be very fast. However, it should be noted that the diameter of the circular head 21 of the winding and unwinding shaft 2 needs to be larger than the installation gap 100, and the optimal solution is to make one-third or one-fourth of the circular head sink into the installation gap 100.

[0021] Further, to provide an auxiliary force for pushing the copper foil, a first gear 92 is provided at the other end of the rotating block 9 of this embodiment relative to the end provided with the cylindrical head 91. A driving motor 10 is provided on the frame 1, and a second gear (not shown in the figure) is provided on the rotating head of the driving motor 10. The first gear 92 and the second gear are connected by a chain 11. It should be noted that the chain 11 only constitutes the rotational linkage between a single rotating block 9 and the motor 10, and the other rotating blocks 9 only act as followers. In this way, when the copper foil is discharged, the motor 10 also moves synchronously, causing the rotating block 9 to rotate accordingly, and then enabling the winding and unwinding shaft 2 itself to rotate, avoiding discharging the copper foil solely relying on the pulling force and preventing the copper foil from being torn.

[0022] Further, regarding the number of roller shafts, the optimal configuration is as follows: there are three first roller shafts 3 and two second roller shafts 6. The two second roller shafts 6 are located at the top and middle of the connecting rod 5. Two of the first roller shafts 3 are flush with each other and located at the output port, and the height of the other first roller shaft 3 is between the second roller shafts 6.

[0023] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included within the patent protection scope of the present invention.

Claims

1. A tension adjustment device for a copper foil typesetting machine, characterized in that: It includes a frame and a winding and unwinding shaft around which a copper foil is wound. At least one rotatable first roller shaft is provided on the frame. The winding and unwinding shaft is rotatably placed on the frame. The winding and unwinding shaft and the first roller shaft are parallel to each other. An installation rod is also connected to the frame through a bearing. At least two connecting rods are fixedly connected to the installation rod. At least one rotatable second roller shaft is installed between the two connecting rods. A push rod is fixedly connected to both ends of the installation rod. Cylinders are provided on the frame at positions opposite to both ends of the installation rod. The pushing head of the cylinder is hingedly connected to the push rod.

2. The tension adjusting device of a copper foil typesetting machine according to claim 1, characterized in that: Four rotating blocks are installed on the frame through bearings. One end of the rotating block is provided with a cylindrical head. Taking two of the rotating blocks as a group, they are respectively located at both ends of the winding and unwinding shaft. The rotating blocks at the same position are flush with each other. And there is a placement gap between the cylindrical head of the rotating block and the cylindrical head of another rotating block. Circular heads are provided at both ends of the winding and unwinding shaft. The circular heads are placed in the placement gap.

3. The tension adjusting device of a copper foil typesetting machine according to claim 2, wherein: A first gear is provided at the other end of the rotating block opposite to the end provided with the cylindrical head. A driving motor is provided on the frame. A second gear is provided on the rotating head of the driving motor. The first gear and the second gear are connected by a chain.

4. The tension adjustment device of a copper foil typesetting machine according to claim 3, characterized in that: There are three first roller shafts and two second roller shafts. The two second roller shafts are located at the top and middle of the connecting rod. Two of the first roller shafts are flush with each other and are located at the output port. The height of the other first roller shaft is between the second roller shafts.

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