Automatic opening and closing device for safety door of circular knitting machine

Abstract

The utility model relates to the textile industry, in particular to an automatic opening and closing device for a safety door of a circular knitting machine. The automatic opening and closing device for the safety door of the circular knitting machine comprises a three-fork bottom plate, a three-legged machine frame, the safety door and a telescopic device, the telescopic device comprises an air cylinder, a connecting rod and a mounting plate, the air cylinder is fixed to the three-fork bottom plate, the mounting plate is fixed to the safety door, and one end of the air cylinder is rotationally connected with the connecting rod. According to the safety door, the connecting rod is driven by the air cylinder, and the pivot shafts at the two ends of the connecting rod are rotationally connected, so that the safety door is opened and closed more smoothly, the air cylinder is hidden below the three-fork bottom plate and is protected, and the mounting space is also saved.

Description

Technical Field

[0001] The utility model relates to the textile industry, in particular to an automatic opening and closing device for a safety door of a circular knitting machine. Background Art

[0002] A safety door is installed on the frame of the circular knitting machine to effectively prevent accidents. At present, the safety door is usually opened and closed manually. The manual switch not only brings inconvenience to the staff, but also reduces the working efficiency of the machine, which cannot keep up with the development needs of machine automation. Nowadays, some companies have explored the automatic control of safety doors. The design scheme includes installing a telescopic mechanism, which is mainly placed between the safety door and the three-pronged base through the front and rear connecting components, and a pivot connection is established with the safety door and the three-pronged base, and then the safety door is controlled by a pneumatic or hydraulic push rod. The disadvantage is that the pneumatic device is located between the safety door and the three-pronged base during the opening and closing process, which requires a large space, and the pivot connection is located on the front and rear sides of the pneumatic device, which makes it easy for the safety door to open and close unsmoothly. Utility Model Content

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides an automatic opening and closing device for the safety door of a circular knitting machine, and the specific scheme is as follows:

[0004] An automatic opening and closing device for a circular knitting machine safety door comprises a three-pronged base plate, a tripod frame, a safety door and a telescopic device, wherein the telescopic device comprises a cylinder, a connecting rod and a mounting plate, the cylinder is fixed to the three-pronged base plate, the mounting plate is fixed to the safety door, and one end of the cylinder is rotatably connected to the connecting rod.

[0005] The tripod frame is composed of three lower legs and a large plate.

[0006] The safety door is arranged between the two lower feet, and the safety door is rotatably connected to the lower feet.

[0007] The front and rear ends of the cylinder are fixed with cylinder fixing blocks by first screws, and the cylinder fixing blocks are fixed by second screws and a three-pronged bottom plate.

[0008] One end of the connecting rod is connected to the cylinder via a Y-shaped joint. The cylinder comprises a cylinder rod. One end of the cylinder rod is threadedly connected to the Y-shaped joint. The Y-shaped joint is connected to the connecting rod via a third screw and a nut.

[0009] One end of the connecting rod is connected to the mounting plate through a joint, the joint and the connecting rod are connected through a third screw and a nut, and the joint is connected to the mounting plate through a fourth screw.

[0010] The mounting plate is fixed to the mounting door by a fifth screw, and a long slot is provided on the mounting plate, and the fifth screw is located in the long slot.

[0011] The utility model drives the connecting rod through the cylinder, and then rotates and connects through the pivots (Y-shaped joints and joints) at both ends of the connecting rod, so that the opening and closing of the safety door is smoother, and the cylinder is hidden under the three-pronged bottom plate to protect it and save installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an automatic opening and closing device for a safety door of a circular knitting machine in the utility model, when the safety door has not yet been opened;

[0013] Figure 2 This is a schematic diagram of the structure of an automatic opening and closing device for a safety door of a circular knitting machine after the safety door is opened;

[0014] Figure 3 It is a structural schematic diagram of a telescopic device in an automatic opening and closing device for a circular knitting machine safety door according to the utility model;

[0015] The numbers are as follows: 1. large plate; 2. bottom foot; 3. safety door; 4. three-pronged base plate; 5. telescopic device; 501. cylinder; 502. cylinder fixing block; 503. second screw; 504. first screw; 505. Y-type joint; 506. third screw; 507. nut; 508. connecting rod; 509. joint; 510. mounting plate; 511. fourth screw; 512. fifth screw. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following embodiments are described in detail in conjunction with the attached drawings. Figure 1-3 , the utility model is further described in detail.

[0017] An automatic opening and closing device for a circular knitting machine safety door comprises a three-pronged base plate 4, a tripod frame, a safety door 3 and a telescopic device 5. The telescopic device 5 comprises a cylinder 501, a connecting rod 508 and a mounting plate 510. The cylinder 501 is fixed to the three-pronged base plate 5, the mounting plate 510 is fixed to the safety door 3, and one end of the cylinder 501 is rotatably connected to the connecting rod 508.

[0018] The tripod frame is composed of three lower legs 2 and a large plate 1. The lower legs 2 are fixed by a three-pronged base plate 4 below.

[0019] The safety door 3 is arranged between the two lower legs 2, and the safety door 3 is rotatably connected to the lower legs 2.

[0020] The front and rear ends of the cylinder 501 are fixed with a cylinder fixing block 502 by a first screw 504 , and the cylinder fixing block 502 is fixed by a second screw 503 and the three-pronged bottom plate 4 .

[0021] One end of the connecting rod 508 is connected to the cylinder 501 via a Y-type joint 505. The cylinder 501 includes a cylinder rod, one end of which is threadedly connected to the Y-type joint 505. The Y-type joint 505 is connected to the connecting rod 508 via a third screw 506 and a nut 507.

[0022] One end of the connecting rod 508 is connected to the mounting plate 510 via a joint 509 , the joint 509 and the connecting rod 508 are connected via a third screw 506 and a nut 507 , and the joint 509 is connected to the mounting plate 510 via a fourth screw 511 .

[0023] The mounting plate 510 is fixed to the mounting door 3 by the fifth screw 512, and a long slot is provided on the mounting plate 510, and the fifth screw 512 is located in the long slot. The mounting plate 510 is fixed to the safety door 3 by screws, and the height of the mounting plate 510 on the safety door 3 (the position of the fifth screw 512 in the long slot) can be adjusted according to actual conditions.

[0024] The safety door 3 is divided into two leaves, which are opened in an eight-shaped pattern. The two safety doors are respectively installed on the left and right feet and rotate with the rotation axis as the center of the circle. A cylinder telescopic device 5 is installed under the three-pronged bottom plate 4 on the corresponding side of each safety door 3.

[0025] When the safety door 3 needs to be opened, compressed air is input into the rodless chamber of the cylinder 501, and exhaust is discharged from the rod chamber, thereby generating thrust on the safety door. As the cylinder piston rod extends, the safety door 3 is opened.

[0026] When the safety door 3 needs to be closed, compressed air is input into the rod chamber of the cylinder 501 and exhaust is discharged from the non-rod chamber, thereby generating a pulling force on the safety door. As the cylinder piston rod retracts, the safety door 3 is closed.

[0027] The above description is not a limitation of the design of the utility model, and the design of the utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the design of the utility model also fall within the protection scope of the design of the utility model.

Claims

1. An automatic opening and closing device for the safety door of a circular knitting machine, characterized in that: It includes a three-pronged base plate, a tripod frame, a safety door and a telescopic device. The telescopic device includes a cylinder, a connecting rod and a mounting plate. The cylinder is fixed to the three-pronged base plate, the mounting plate is fixed to the safety door, and one end of the cylinder is rotatably connected to the connecting rod.

2. The automatic opening and closing device for the safety door of a circular knitting machine according to claim 1, characterized in that: The tripod frame is composed of three lower legs and a large plate.

3. The automatic opening and closing device for the safety door of a circular knitting machine according to claim 2, characterized in that: The safety door is arranged between the two lower feet, and the safety door is rotatably connected to the lower feet.

4. The automatic opening and closing device for the safety door of a circular knitting machine according to claim 1, characterized in that: The front and rear ends of the cylinder are fixed with cylinder fixing blocks by first screws, and the cylinder fixing blocks are fixed by second screws and a three-pronged bottom plate.

5. The automatic opening and closing device for the safety door of a circular knitting machine according to claim 1, characterized in that: One end of the connecting rod is connected to the cylinder via a Y-shaped joint. The cylinder comprises a cylinder rod. One end of the cylinder rod is threadedly connected to the Y-shaped joint. The Y-shaped joint is connected to the connecting rod via a third screw and a nut.

6. The automatic opening and closing device for the safety door of a circular knitting machine according to claim 1, characterized in that: One end of the connecting rod is connected to the mounting plate through a joint, the joint and the connecting rod are connected through a third screw and a nut, and the joint is connected to the mounting plate through a fourth screw.

7. The automatic opening and closing device for the safety door of a circular knitting machine according to claim 1, characterized in that: The mounting plate is fixed to the mounting door by a fifth screw, and a long slot is provided on the mounting plate, and the fifth screw is located in the long slot.

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