A safety interlock device for a metal cutting machine

Abstract

The utility model discloses a metal cutting machine safety interlocking device relates to cutting device technical field. Including distribution box, overhauling box, first cable, second cable and cutting assembly, distribution box inner electric element is connected with the electric element in overhauling box through second cable, distribution box inner electric element is connected with cutting assembly through first cable, and the inner portion of distribution box is fixedly installed with contactor, short circuiter and electric brake respectively, and contactor, short circuiter and electric brake are all connected through electric wire, and the contactor is installed in the circuit between the output circuit of cutting chassis and cutting assembly, and after the electric brake is closed in distribution box by operating personnel, the face guard hung on the travel switch is not taken down, so that the cutting machine will not rotate, only after the face guard on the travel switch is taken down, the cutting machine can normally operate, so as to avoid the safety accident caused by human factors, and the personal safety of workers is protected by upgrading and perfecting hardware facilities.

Description

Technical Field

[0001] This utility model relates to the field of cutting device technology, and in particular to a safety interlock device for a metal cutting machine. Background Technology

[0002] Metal cutting machines, as common metal processing equipment, are widely used in machining, manufacturing, and maintenance. However, due to the brittle and fragile nature of the grinding wheel and the high speed and sparks generated during operation, improper or negligent operation can easily cause personal injury to operators. Whether its use complies with safe operating procedures is directly related to the personal safety of every operator. Therefore, ensuring the safe use of metal cutting machines is of paramount importance.

[0003] In the current use of metal cutting machines, there are no safety protection devices. Regardless of whether a protective mask is worn, the machine can be used as long as the switch is turned on, which greatly increases the probability of violations and causes personal injury accidents. Some operators may operate the cutting machine directly without wearing a safety mask due to negligence or taking chances, which poses a significant safety hazard. In order to ensure the personal safety of operators, it is necessary to design a safety protection device that ensures that the cutting machine can only be started after wearing a safety mask. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a safety interlock device for metal cutting machines. This device can solve the problem that in the current use of metal cutting machines, there are no safety protection devices. Regardless of whether a protective mask is worn, the machine can be used as long as the switch is turned on, which greatly increases the probability of violations and causes personal injury accidents. Some operators may operate the cutting machine directly without wearing a safety protective mask due to negligence or taking chances, which poses a great safety hazard. This invention aims to ensure the personal safety of operators.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety interlock device for a metal cutting machine, comprising:

[0006] The distribution box, maintenance box, first cable, second cable, and cutting assembly are provided. The electrical components in the distribution box are connected to the electrical components in the maintenance box via the second cable, and the electrical components in the distribution box are connected to the cutting assembly via the first cable.

[0007] The distribution box contains a contactor, a circuit breaker, and a switch, all of which are connected by wires. The contactor is installed in the circuit between the output circuit of the cutting frame and the cutting assembly. The three-phase power drawn from the distribution box is connected to the circuit breaker, the main contacts of the contactor, and the cutting assembly in sequence.

[0008] Preferably, the second cable is fixedly installed on the wall by a wire clamp, a pipe clamp is fixedly installed on the outer surface of the second cable, a limit switch is fixedly connected to the pipe clamp, a hook is fixedly connected to the contact of the limit switch, and a face mask is suspended on the hook.

[0009] Preferably, the cutting assembly includes a cutting base, a tool mounting bracket, a start button, and a stop button. The tool mounting bracket is mounted on the cutting base, the start button is fixedly mounted on one side of the tool mounting bracket, and the stop button is fixedly mounted on the cutting base.

[0010] Preferably, the mask is transparent.

[0011] Preferably, the distribution box is fixedly installed on the wall by bolts, and a door is hinged to one side of the distribution box.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The safety interlock device of this metal cutting machine prevents the machine from rotating if the operator does not remove the mask hanging on the limit switch after turning on the power switch in the distribution box. The machine can only operate normally after the mask is removed from the limit switch. This is to avoid safety accidents caused by human factors and to protect the personal safety of employees through the upgrading and improvement of hardware facilities. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the cutting machine structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the limit switch structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the distribution box of this utility model.

[0019] Attached reference numerals: 1. Cutting base frame; 2. Start button; 3. First cable; 4. Distribution box; 5. Limit switch; 6. Inspection box; 7. Second cable; 8. Face shield; 9. Hook; 10. Contactor; 11. Circuit breaker; 12. Pipe clamp; 13. Switch; 14. Tool mounting bracket; 15. Stop button. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a safety interlock device for a metal cutting machine, comprising:

[0025] The distribution box 4, maintenance box 6, first cable 3, second cable 7 and cutting assembly are provided. The electrical components inside the distribution box 4 are connected to the electrical components inside the maintenance box 6 through the second cable 7. The electrical components inside the distribution box 4 are connected to the cutting assembly through the first cable 3. The distribution box 4 is fixedly installed on the wall with bolts. A door is hinged on one side of the distribution box 4.

[0026] Inside the distribution box 4, contactor 10, circuit breaker 11 and switch 13 are fixedly installed. Contactor 10, circuit breaker 11 and switch 13 are all connected by wires. Contactor 10 is installed in the circuit between the output circuit of the cutting base frame 1 and the cutting assembly. The three-phase power drawn from the distribution box 4 is connected to the main contacts of circuit breaker 11, contactor 10 and cutting assembly in sequence.

[0027] The second cable 7 is fixedly installed on the wall by a cable clamp. A pipe clamp 12 is fixedly installed on the outer surface of the second cable 7. A limit switch 5 is fixedly connected to the pipe clamp 12. A hook 9 is fixedly connected to the contact of the limit switch 5. A mask 8 is suspended on the hook 9. The mask 8 is transparent.

[0028] The cutting assembly includes a cutting base frame 1, a tool mounting bracket 14, a start button 2, and a stop button 15. The tool mounting bracket 14 is mounted on the cutting base frame 1, the start button 2 is fixedly mounted on one side of the tool mounting bracket 14, and the stop button 15 is fixedly mounted on the cutting base frame 1.

[0029] Furthermore, when using this device, before starting the cutting machine, the operator needs to hang the hook of the face mask 8 on the hook 9 of the limit switch 5. After the operator closes the circuit breaker 13 in the distribution box 4, if the face mask 8 is not removed from the limit switch 5 and the start button 2 on the cutting machine is turned on, the cutting machine will not turn. Only after the face mask 8 is removed from the limit switch 5 will the limit switch 5 activate, and pressing the start button 2 will cause the contactor 10 to engage, at which point the cutting machine will operate normally. This is to avoid safety accidents caused by human factors and to protect the personal safety of employees through the upgrading and improvement of hardware facilities.

[0030] Connect the output power line of the distribution box 4 to the input terminal of the contactor 10. Lead out the first cable 3 from the output terminal of the contactor 10 and connect it to the power input terminal of the cutting machine. Connect the output terminal of the contactor 10 to the three-phase motor input terminal of the cutting machine. The stop button 15 is usually a normally closed button. Connect one end of it to one end of the coil circuit of the contactor 10 and the other end to the neutral line (N line) of the power supply.

[0031] Furthermore, when using this device, pressing the stop button 15 de-energizes the coil of contactor 10, disconnecting the main contacts of contactor 10 and thus cutting off the power supply to the cutting machine. The start button 2 is typically a normally open button, with one end connected to the coil circuit of contactor 10 and the other end connected to the phase line (L line) of the power supply through the auxiliary normally open contact (self-locking contact) of contactor 10. When the start button 2 is pressed, the coil of contactor 10 is energized, the main contacts of contactor 10 close, and its auxiliary normally open contact closes to achieve self-locking, keeping contactor 10 in the energized state, and the cutting machine continues to work. When the cutting machine is in use and the safety mask is not worn, the mask 8 is hung on the hook 9, causing the contacts on the limit switch 5 to open, breaking the circuit and making the cutting machine unusable. Only when the mask 8 is worn, the contacts on the limit switch 5 reset, closing the circuit, allowing the cutting machine to be used normally.

[0032] After the operator closes the circuit breaker 13 in the distribution box 4, the mask 8 hanging on the limit switch 5 is not removed, so the cutting machine will not rotate. Only after the mask 8 is removed from the limit switch 5 can the cutting machine operate normally. This is to avoid safety accidents caused by human factors and to protect the personal safety of employees by upgrading and improving hardware facilities.

[0033] Structural Description: Cutting base 1 and tool mounting bracket 14 are both existing structures on the cutting machine;

[0034] Limit switch 5: Please refer to the specific model: LX19-111;

[0035] Contactor 10: Refer to model: Chint CJX2-1210 AC contactor, with a rated current of 12A, which meets the usage requirements of general small metal cutting machines.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A safety interlock device for a metal cutting machine, characterized in that, include: The electrical components in the distribution box (4), maintenance box (6), first cable (3), second cable (7) and cutting assembly are connected to the electrical components in the maintenance box (6) via the second cable (7) and to the cutting assembly via the first cable (3). Inside the distribution box (4), a contactor (10), a short circuit (11), and a switch (13) are fixedly installed. The contactor (10), the short circuit (11), and the switch (13) are all connected by wires. The contactor (10) is installed in the circuit between the output circuit of the cutting base (1) and the cutting assembly. Among them, the three-phase power drawn from the distribution box (4) is connected to the short circuit device (11), the main contact of the contactor (10) and the cutting assembly in sequence; The second cable (7) is fixedly installed on the wall by a wire clamp, and a pipe clamp (12) is fixedly installed on the outer surface of the second cable (7). Among them, a limit switch (5) is fixedly connected to the pipe clamp (12), a hook (9) is fixedly connected to the contact of the limit switch (5), and a mask (8) is suspended on the hook (9).

2. The safety interlock device for a metal cutting machine according to claim 1, characterized in that: The cutting assembly includes a cutting base (1), a tool mounting bracket (14), a start button (2), and a stop button (15). The tool mounting bracket (14) is mounted on the cutting base frame (1), the start button (2) is fixedly mounted on one side of the tool mounting bracket (14), and the stop button (15) is fixedly mounted on the cutting base frame (1).

3. The safety interlock device for a metal cutting machine according to claim 1, characterized in that: The mask (8) is transparent.

4. A safety interlock device for a metal cutting machine according to claim 1, characterized in that: The distribution box (4) is fixedly installed on the wall by bolts, and a door is hinged on one side of the distribution box (4).

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