RU2264140C1 - Device for individual protection of hands against vibration - Google Patents

Abstract

FIELD: devices for individual protection of hands against vibration.

SUBSTANCE: proposed device is made in form of gloves or mittens with moisture-absorbing inner body and mechanically strong outer body fastened together on palm surface through anti-vibration elastic-deformation layer which consists of rubber sponge P-29 with 95% of open pores at apparent density of 230-300 kg/m³.

EFFECT: enhanced efficiency of protection of hands against vibration.

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Description

The invention relates to labor protection.

Known personal protective equipment (PPE) for hands against vibration, made in accordance with the general technical requirements of GOST 12.4.002-97 [GOST 12.4.002-97 Personal protective equipment for hands from vibration. - 11 s]. The effectiveness of these PPE hands from vibration is determined by the elastic-damping properties of the applied vibration insulation materials. Such materials are a rubber medical tube, or synthetic winterizer, or foam rubber. However, the elastic-damping properties of these materials do not provide reliable protection of the hands from vibration, create high resistance when moving with fingers and hands, do not provide the necessary working contact between the operator and the tool, and do not facilitate the execution of precise coordinated finger movements required by the production.

The closest to the claimed invention in terms of features is a well-known commercially available device - anti-vibration gloves of the Vibrostat series of the Russian trademark AMPARO tm, consisting of internal fabric and mechanically durable outer leather cases, bonded to each other on a palm surface through a vibration-proof elastic-damping layer, consisting of "AirGel" gel filler.

However, having anti-vibration properties that meet the requirements of GOST 12.4002-97 "Personal protective equipment against vibration", anti-vibration gloves "Vibrostat" are most effective at low pressure (up to 50 N) on the vibrating device. With large efforts to press (over 50 N) on the vibrating device, the protection efficiency of the Vibrostat anti-vibration gloves decreases, especially in the low-frequency and mid-frequency vibration spectra. Protection from vibration of 8-63 Hz is the most urgent task of labor protection when working with a vibration tool that transfers local vibration to the hands due to the high penetration and low absorption of vibrational energy caused by low-frequency and mid-frequency vibration [Alekseev S.V., Usenko V. R. Industrial vibration // In hand .: Occupational health. - M .: Medicine, 1988. - S.150-167]. Prevention of the harmful effects of low-frequency and mid-frequency vibration is complicated by the combined exposure of the operator to great muscle effort associated with pressing a vibrating tool that generates such vibration. Hacking the road surface with jackhammers, compaction of the soil with rammers, drilling holes with perforators, chipping with chipping hammers and other professional activities using a vibrating tool that generates low-frequency and mid-frequency vibration are accompanied by intense efforts to press the vibrating tool, usually exceeding 50 N (up to 500- 600 N or more).

The objective of the invention is to increase the anti-vibration properties of PPE hands from vibration.

This problem is solved in the inventive device for individual protection of hands from vibration, made in the form of gloves or mittens, consisting of an inner fabric and mechanically durable outer leather cases, bonded together on a palm surface through a vibration-proof elastic-damping layer. According to the invention, the vibration-proof elastic-damping layer consists of a rubber sponge R-29 containing 95% closed pores, with an apparent density of 230-300 kg / m ³ according to TU 38105121-91. Sponge R-29 is made by Ekaterinburg CJSC Uralelastotekhnika and is intended for waterproofing fuel tanks in aircraft. The use of the R-29 rubber sponge as an elastic-damping layer in the SIZ of the hands from vibration transmitted to the operator’s hands, allows to maintain the property of low resistance when moving with fingers and hands, provides the necessary working contact of the operator with the tool and contributes to the execution of precise coordinated finger movements required by the production.

A comparative analysis of the proposed solution with the prototype and other technical solutions in this technical field shows that the claimed device is characterized in that the vibration-proof elastic-damping layer contained in it consists of a rubber sponge P-29 containing 95% of closed pores with an apparent density of 230-300 kg / m ³ according to TU 38105121-91.

Thus, the claimed device meets the criteria of the invention of "Novelty" and "Significant differences".

The essence of the invention lies in the fact that between the inner and outer layers of the glove or mitt adjacent to the palm surface is an elastic-damping layer consisting of a rubber sponge P-29 containing 95% of closed pores with an apparent density of 230-300 kg / m ³ according to TU 38105121 -91.

The inventive device is brought into operation as follows. Gloves or mittens are worn on the hands and are used to protect the hands from vibration transmitted by the vibration generator.

The test results of the inventive device on a vibration bench using a Robotron 00042 vibrometer are presented in Tables 1 and 2. Tests have shown that with the same thickness of an elastic damping vibration isolation material equal to 8 mm, the use of the inventive device in comparison with the prototype is 2.5-7.0 dB further reduces transmission of vibration to the operator’s hands. The greatest effectiveness of the vibration protection of the claimed device is in the range of low-medium vibration frequencies and at high levels of pressure on the vibration generator. The greater effectiveness of the vibration protection of the claimed device in comparison with the prototype can be explained by the fact that the elastic elements of the rubber sponge R-29 in the claimed device, in comparison with those of the AirGel elements in the prototype, have such a bond strength that provides reliable protection against vibration when exposed to a vibroprotective layer of both small and large pressures and at a pressure of more than 50 N, to a lesser extent allows the elastic elements to move beyond the area of contact with the pressing object.

A higher degree of protection of the hands from vibration when using the inventive device in comparison with the prototype, especially in combination with the effect of high pressure pressing the vibration generator, can reduce the risk of vibration disease.

Thus, the claimed device in comparison with the prototype can reduce the transmission of vibration to the hands of the operator. The indicated advantage of the claimed device can provide its widespread use in production and everyday life.

Table 1
The results of comparative laboratory tests of the anti-vibration properties of the claimed device and prototype Antivi
fraternal device Force
pressing, N Vibration frequency, Hz 8 16 31.5 63 125 250 500 1000 Efficiency of protection against vibration, dB (normative data according to GOST 12.4.002-97 are presented in brackets) Prototype fifty 7.0 2,5 8.0 (2) 4.0 (2) 4.0 (3) 12 (4) 28 (5) 18 (8) 100 2.0 3,5 4,5 (2) 4.0 (2) 5.0 (3) 9.0 (4) 16 (5) 22 (6) 150 1,0 2,5 2.5 (1) 2.0 (2) 13.0 (2) 12, (3) 4.0 (3) 6.0 (5) The inventive "sponge R-29" fifty 12.0 3,5 8.5 (2) 4.0 (2) 6.0 (3) 17.0 (4) 31.0 (5) 24 (8) 100 5,0 5,0 11.0 (2) 8.0 (2) 3.0 (3) 9.0 (4) 25 (5) 16 (6) 150 3.0 5,0 8.0 (1) 6.0 (2) 11.0 (2) 12.0 (3) 11.0 (3) 12 (5) table 2
The results of comparative laboratory tests of the anti-vibration properties of the claimed device and prototype Anti-vibration device Force, N Efficiency of protection against vibration according to the adjusted value of vibration acceleration, dB (enter exit) result Prototype "Vibrostat" fifty 101/98 3.0 100 103 / 99.5 3,5 150 104 / 99.5 4,5 The inventive "sponge R-29" fifty 101/98 3.0 100 103 / 98.5 4,5 150 104 / 96.5 7.5

Claims (1)

Device for individual protection of hands from vibration, consisting of an inner fabric and mechanically durable outer shells bonded together on the palm surface through an anti-vibration elastic-damping layer, characterized in that the elastic-damping layer consists of a rubber sponge R-29 containing 95% of closed pores, s an apparent density of 230-300 kg / m ³ .