GB/T 39940-2021 English PDF

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GB/T 39940-2021: Footwear manufacturing machines - Modular shoe repair equipment - Safety requirements
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39940-2021	559	Add to Cart	3 days	Footwear manufacturing machines - Modular shoe repair equipment - Safety requirements	Valid

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Basic data

Standard ID: GB/T 39940-2021 (GB/T39940-2021)
Description (Translated English): Footwear manufacturing machines - Modular shoe repair equipment - Safety requirements
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y99
Word Count Estimation: 30,333
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39940-2021: Footwear manufacturing machines - Modular shoe repair equipment - Safety requirements

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Footwear manufacturing machines - Modular shoe repair equipment - Safety requirements ICS 61.080 Y99 National Standards of People's Republic of China Safety requirements for shoe-making machinery combined shoe repairing machine Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ Introduction Ⅱ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Safety requirements/protective measures 6 5 Verification of safety requirements/protective measures 9 6 Usage information 12 Appendix A (informative appendix) List of major hazards 14 Appendix B (Normative Appendix) Requirements for Protective Covers and Protective Devices 16 Appendix C (Normative Appendix) Requirements for Dust Removal System 17 Appendix D (Normative Appendix) Opening and Closing Section of Protective Device of Shoe Repair Machine 18 Appendix E (Normative Appendix) Minimum spacing and working height requirements for finishing machines 20 Appendix F (Normative Appendix) Lighting Requirements for Finishing Machines 21 Appendix G (Normative Appendix) Keep-Operation Control Device Requirements 22 Appendix H (Informative Appendix) Noise Test Specification for Combined Shoe Repair Machine 23 References 26 Safety requirements for shoe-making machinery combined shoe repairing machine

1 Scope

This standard specifies the structure, transportation, installation, setting, process conversion, operation, cleaning, maintenance of the combined shoe repairing machine (hereinafter referred to as the "machine") Related safety requirements for protection. This standard includes all the heavy equipment related to the machine within the scope of this standard caused by the operator’s expected use of the machine and foreseeable misuse. Major hazards, dangerous states and dangerous events (see Appendix A). This standard applies to machines and auxiliary equipment used for repairing shoes, leather and artificial leather products in the shoe industry. Machine for making and repairing orthopedic shoes. This standard does not apply to. ---Sewing machine; ---Automatic bottom matching machine; ---External line machine; ---Hand-held pneumatic nailing machine or nailing device.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 1251.2-2006 Ergonomics General requirements, design and inspection of visual signals for dangerous situations GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components GB 4706.88-2008 Safety of household and similar electrical appliances, industrial and commercial wet or dry vacuum cleaners with power brushes, special Claim GB/T 5226.1-2019 Electrical safety of machinery Electrical equipment of machinery Part 1.General technical conditions GB/T 7932 General rules and safety requirements for pneumatic systems and their components GB/T 8196-2018 General requirements for the design and manufacture of fixed and movable protective devices for mechanical safety protection devices GB/T 12265.3-1997 The minimum distance for mechanical safety to avoid extrusion of various parts of the human body GB/T 15706-2012 General Principles of Mechanical Safety Design Risk Assessment and Risk Reduction GB/T 16754-2008 Mechanical safety emergency stop design principles GB/T 16855.1-2018 Safety-related components of machinery safety control system Part 1.General design rules GB/T 17421.5-2015 General Rules for Inspection of Machine Tools Part 5.Determination of Noise Emissions GB/T 17888.1 Mechanical safety access to fixed facilities of machinery-Part 1.Selection of fixed facilities and general requirements for access GB/T 18153-2000 Ergonomics data for determining the temperature limit of hot surface temperature for mechanical safety accessible surface temperature GB/T 18209.1 Machinery and electrical safety instructions, signs and operations Part 1.Requirements for visual, auditory and tactile signals GB/T 18569.1-2020 Safety of machinery to reduce the risk to health of harmful substances emitted by machinery Part 1.Used in machinery Principles and specifications of machine manufacturers GB/T 18831 Interlocking device design and selection principles related to mechanical safety and protective devices 4 Safety requirements/protective measures 4.1 General The combined shoe repair machine shall meet the safety requirements/protection measures of this chapter. If there is a non-significant hazard not mentioned in this standard, it should be Design in accordance with the relevant principles specified in GB/T 15706-2012. For the use of GB/T 23821-2009, GB/T 16754-2008, GB/T 5226.1-2019 and other B standards that can reduce wind The manufacturer should complete a specific risk assessment and ensure that these machines meet the safety requirements of Class B standards. 4.2 General requirements 4.2.1 Mechanical equipment 4.2.1.1 All transmission components and driving devices that may cause danger should use a fixed and enclosed protection that meets GB/T 8196-2018. Protective device for protection. 4.2.1.2 Unless otherwise specified in 4.3, the dangerous actions of moving mechanical parts, tools, and workpieces shall be based on applicability and scope of application, as follows. Protection is given in the manner given. ---Fixed enclosed protective device in accordance with GB/T 8196-2018; or when technically impossible. ---Protected by a fixed protective cover conforming to Appendix B. 4.2.1.3 Unless otherwise specified in 4.3, the safety distance and clearance shall meet the relevant requirements of Table 1, Table 3 and Table 4 in GB/T 23821-2009 Claim. When removing the fixed protective device and the fixed protective cover, its connecting piece should be kept connected with the protective device or the machine. 4.2.1.4 If the maximum force of the moving parts is limited to 150N, and the contact pressure is limited to 50N/cm2, when extrusion, No protective device is required for shearing, inhalation, sinking, friction and other actions. 4.2.1.5 The surface of the area where the operator stands for frequent operations should meet the requirements of GB/T 17888.1. 4.2.2 Electrical equipment 4.2.2.1 The basic requirements for electrical systems and equipment are as follows. ---AC power supply should comply with the provisions of 4.3.2 in GB/T 5226.1-2019; DC power supply should comply with GB/T 5226.1-2019 The provisions of 4.3.3; --- All circuits or components should be protected in accordance with the provisions of 6.2 of GB/T 5226.1-2019; ---Stop operation should meet the requirements of 9.2.3.3 and 9.2.3.4 in GB/T 5226.1-2019, and the stop function and emergency disconnection are Class 0 or Class 1; ---Failure control shall comply with the provisions of 9.4.1 and 9.4.2 in GB/T 5226.1-2019, and shall be protected in accordance with 9.4.3; ---The protection level of the enclosure should be in accordance with the provisions of 11.3 in GB/T 5226.1-2019, generally IP43.When using electronic devices such as printed When the circuit board is IP54. The safety-related components of the control system shall also comply with the provisions of 4.2.6.1 and 4.2.6.2 of this standard. 4.2.2.2 All operation control devices that need to be adjusted frequently for changing process settings should be installed outside the electric control cabinet. 4.2.3 Hot surface For those hot surfaces that are not directly needed during the work process but are within the reachable range, safety devices should be provided to avoid accidental contact. The surface temperature should not exceed the burn threshold of related materials specified in GB/T 18153-2000 and the contact time should be less than 1s. 4.2.4 Noise 4.2.4.1 Noise control The technical means and related information used to control noise from the source, such as moving mechanical parts, tools, pneumatic, hydraulic and exhaust equipment, etc., should be To be considered in the machine design process, see GB/T 25078.1.The possible ways to reduce noise during the design process are as follows. a) Reduce vibration through static and dynamic balance of rotating parts; b) Reduce its own vibration by reducing the mass of moving parts and reducing their acceleration; c) Reduce the effect of clearance by increasing the preload of the rolling bearing; d) Select and design appropriate energy conversion components to eliminate jitter; e) Select and design appropriate transmission components (such as gears, pulleys, belts, bearings, etc.); f) Pay attention to vibration reduction during structural design, suppress and avoid structural resonance, especially wrapping damping rubber or felt on the transition shaft; g) Appropriate pneumatic exhaust silencer. Note. GB/T 25078.2 gives effective information on the mechanism of mechanical noise. The noise reduction schemes listed above are not all methods. The manufacturer may also use other equivalent or more efficient measures. 4.2.4.2 Information to reduce noise If it is known at the design stage that the noise cannot be reduced to an acceptable level, the manufacturer should provide further information on noise reduction, See 6.4. 4.2.5 Smoke that damages health The operation of the shoe repair machine may cause smoke and dust emissions to endanger human health. The manufacturer shall provide internal dust removal equipment or Connect to the interface of the external dust removal system. Should be carried out in accordance with the requirements of Chapter 6 of GB/T 18569.1-2020 and Appendix C of this standard Set up. 4.2.6 Control system 4.2.6.1 The control system shall meet the following basic requirements. ---Electrical system. should meet the requirements of Chapter 9 of GB/T 5226.1-2019 and 4.2.2 of this standard; ---Pneumatic system. should meet the requirements of GB/T 7932; ---Hydraulic system. should meet the requirements of GB/T 3766. 4.2.6.2 The safety-related components of the control system shall at least comply with the PLb in GB/T 16855.1-2018. 4.2.6.3 In order to avoid accidental start of the motor, or the movement of the press due to failure or accidental reconnection of the power supply, corresponding solutions should be provided Program. For pneumatic and hydraulic systems, pressure switches can be used for control. 4.2.6.4 In order to avoid accidental operation of the foot controller that can trigger dangerous actions, the control device should be installed in the frame of the machine and should be It prevents the operator from accidentally triggering or falling objects accidentally triggering the bridge-type protective cover of the controller for protection. 4.2.6.5 When using a protective cover to protect two or more foot controllers, the distance between the two pedals should be greater than 150mm, Otherwise, a vertical partition should be set between the two pedals for separation. 4.2.7 High pressure fluid system The hydraulic system or pneumatic system shall meet the requirements of 6.2.10 in GB/T 15706-2012 and GB/T 3766 and GB/T 7932. 4.2.8 Ergonomics The design of the machine should comply with the ergonomic principles of 6.2.8 of GB/T 15706-2012. 4.3 Specific requirements 4.3.1 Finishing machine with manual scrubbing, brushing, polishing and finishing functions 4.3.1.1 All rotating shafts and tool shafts, nuts, bolt heads and fastening devices shall be fixed and enclosed in accordance with GB/T 8196-2018. Protective device for protection. The follower in the rotating shaft should stop immediately when it is touched. The shaft end of the drive shaft does not need protection under the following conditions. ---The shaft end is a circular arc; ---The surface of the shaft end is smooth; ---The exposed length of the shaft end does not exceed 1/4 of its diameter, or the shaft end (in the box) is 15mm from the box gap; if the distance is insufficient 15mm, a removable cover can be set at the notch. 4.3.1.2 Unless the parts are in a closed environment, scrubbing and polishing tools should adopt any of the following protective measures. ---GB/T 8196-2018, GB/T 18831 and the interlocking protection device of this standard B.2; ---GB/T 8196-2018 and the fixed protective device in Appendix B of this standard. Taking into account the technical limitations of operation, hinged guards with locks can also be used. The opening and closing interval of the protective device shall meet the requirements of the shoe repairing machine in Figure D.1 in Appendix D and the orthopedic shoe finishing machine in Figure D.2. 4.3.1.3 When the tool contains a sharpening wheel, the sharpening wheel should use a fixed protective cover as far as possible. The protective cover of the grinding wheel should at least meet the following conditions. a) It is made of steel plate, and its thickness is not less than 1.5mm; b) When there are impurities splashing, it can block the splashing and make it fall down; c) The opening angle is not more than 120°. Note. See GB 4674 for more information. 4.3.1.4 The sanding device should be designed to extract tools from only one side of the equipment. 4.3.1.5 If the sanding device cannot be protected in accordance with the provisions of 4.3.1.1, its operation should be indicated by a danger signal. The danger signal It shall meet the requirements for visual signals of dangerous situations in GB/T 1251.2-2006.Reliable and appropriate danger stroboscopic signal should be given to cause operation Special attention of the author. 4.3.1.6 The adjustment method of the trimming width adjuster should be designed to avoid possible dangers caused by the rotation of the cutter, for example, the adjustment device and the cutter There should be sufficient distance between the accessible parts. 4.3.1.7 All rotating edge trimming tools shall be protected by a protective cover, which shall meet one of the following requirements. a) Transparent protective device to protect the operator's eyes from splashes; or b) Use a deflector to deflect the waste particles downward. 4.3.1.8 In order to avoid the fire and explosion hazards of the finishing machine and its integrated system, the finishing machine shall be subject to the following requirements. ---Install the internal dust removal system or set up the interface connected to the external exhaust dust removal system. In the scheme of installing an internal dust removal system, Fume collection, transportation and disposal devices should be installed at the same time to ensure the formation of a simple and safe dust removal system. ---According to the requirements of GB/T 23819, avoid overheating and overheating of the finishing machine when the dust collection device is set to exceed 5mm. Sparks may cause a fire hazard. ---Areas where dust accumulation may cause a fire hazard should be easy for the operator to enter without using auxiliary equipment. Such areas are not There should be a dangerous point. The information of such areas and the cleaning method should be described in the instruction manual, see 6.2.Should still be in use The instructions provide suggestions on how to dispose of dust. 4.3.1.9 Dust bags for collecting large particles of dust should be made of non-combustible materials; dust bags and filter bags for collecting fine dust should be made of flame retardant Made of materials. 4.3.1.10 The dust discharge pipeline should be equipped with baffles or other measures to reduce the risk of burning caused by high-temperature objects contacting the dust removal system. Information on the residual risk of fire should be given in the instruction manual, and corresponding measures that can be taken should also be indicated. 4.3.1.11 In order to avoid explosion hazard, the internal exhaust gas exhaust system should only install the 3 types of devices specified in GB 25285.1-2010.meets the Exhaust emission systems with all the following conditions meet this regulation. ---Dynamic ignition sources have been avoided; ---The surface temperature of the dust-covered area (such as the engine) does not exceed 135℃; ---Enclosure protection level of electrical equipment. IP54; ---The fan blades are made of materials that do not produce sparks. 4.3.1.12 The design of finishing machine should comply with the following requirements of Appendix E and Appendix F in terms of ergonomics. ---Processing height; ---The space required for each work area; ---illumination. The manufacturer shall provide the overall lighting of the finishing machine in accordance with the requirements of GB/T 28780, or specify the operator to operate in the instruction manual The appropriate lighting brightness required. Appendix F specifies the working lighting requirements for finishing machines. 4.3.1.13 The finishing machine should be equipped with an emergency stop device that complies with the type 0 or type 1 shutdown in GB/T 16754-2008. 4.3.2 Heel and sole pressing machine 4.3.2.1 The danger of squeezing and shearing between the pressure pad or airbag and the processed object or in the final state of compression shall be carried out by one of the following measures Protection. a) Type ⅢA two-hand control device in accordance with GB/T 19671-2005; b) Keep-operation control device in accordance with Appendix G. 4.3.2.2 The minimum gap between the pressure pad or the top of the airbag and the frame of the heel and sole pressing machine, according to GB/T 12265.3-1997 The requirements in Table 1 should be 25mm, or be protected by a protective device whose safety distance meets the requirements of GB/T 23821-2009. 4.3.3 Nail device On devices with fixed nails and staple tools, additional control should be provided to prevent dangerous actions that may be accidentally triggered when the workpiece is fed. E.g, To start the machine, the operator should also trigger a foot controller without self-locking function to avoid misoperation. 4.3.4 Power distribution device For power distribution devices that use rotating or reciprocating blades, the protective device held by the spring should maintain a net of less than 6mm. Space to prevent access to the cutting blade when there is no workpiece. 4.3.5 Component integration The above requirements also apply when functional components with specific requirements are integrated as a machine. 5 Verification of safety requirements/protective measures This chapter contains practical verification methods for the safety requirements specified in Chapter 4.All safety measures in Chapter 4 include self-evident The acceptance criteria and other verification methods are shown in Table 1. ......

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