RU2388550C1 - Device to paint large-size products - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to painting equipment and can be used in fitting industrial chambers in individual and small-lot production for painting and drying, for example automotive bodies with medium and larger length sides, etc. For this proposed device comprises closed-type intermittent-operation chamber with filtration of heated air forced from above and furnace system to maintain air temperature inside said chamber required for drying large-size product. Central guide channel arranged along movable elevator travel line is made on chamber floor and loading platform ahead of said chamber. Elevator consists of two or more separate support frames arranged along aforesaid channel and mounted on running wheels to carry its service platform coupled with said frame by two parallel Nuremberg-scissors-type articulated linkages elevating service platform. Every support frame incorporates lengthwise stop limiting travel of movable elevator that has two side contact rollers arranged on stop ends and buried in guide channel, above its bottom, for contact rollers to rest upon channel side walls. Support frame comprises also service platform lift drive consisting of two power mechanisms arranged in parallel between aforesaid articulated linkages in vertical plane located across movable elevator travel line. Said power mechanisms consist of flexible inflatable envelopes connected to compressed air source and two lateral frame-box-like safety devices preventing elevator overturn arranged above aforesaid floor at minor distance from it. Said safety mechanisms double as elevator structure stability stabiliser. Support frames are interconnected via telescoping tubular fixation element that defines the distance between said frames subject to large-size product length. One of said support frames is furnished with elevator pneumatic drive. All pneumatic drives of proposed device are connected to common compressed air source via pneumatic control system that ensure compressed air feed to bring elevation of platforms into synchronism.

EFFECT: higher efficiency and reliability of painting and drying.

12 cl, 10 dwg

Description

The invention relates to painting equipment, in particular to devices for painting large-sized products, and can be used in the equipment of industrial cameras in individual and small-scale production for painting and drying such products as automobile bodies with medium and long sides and other similar products.

One of the characteristics of industrial chambers that have a significant impact on the manufacturability of painting equipment for painting and drying products is transportability - the possibility of loading and unloading in their equipment (see the book Myachin V.A., Shabelsky V.A. Design of equipment for paint shops. M. : Engineering, 1989, p. 5).

For loading and unloading and reloading operations, lifts, reloaders, tilters, self-propelled carts, live rolls, technological carts, etc. are used. mechanization means for transporting painted products in paint shops in small-scale and conveyor production (see the book Installation, commissioning and operation of equipment for paint shops. L .: Chemistry, 1977, p.24).

At the same time, if a large-sized product is required to be painted on both sides, and the product cannot be turned in the chamber, a device for painting such a product is known, consisting of two chambers, working (transport) openings directed in opposite directions and interconnected by a platform, or installation tubeless painting of a large-sized product with a floor grating (see the book Installation, commissioning and operation of equipment for paint shops. L .: Chemistry, 1977, p.12-13).

The specified painting technique in the first case is complicated by two chambers and a vestibule between them, in the second case it is simplified with damage to ensure the technological conditions for painting products.

In addition, painting is complicated when it is necessary to paint the platform and the sides of the car body from different sides (see the article How to Paint BelAz. - Auto Repair News, 2007, No. 7).

The trend in the development of painting equipment is the savings in production space achieved in combined chambers for painting and drying products, in particular cars, vans and small trucks (see I. Melnikov's book Automobile: painting and corrosion protection. Rostov-on-Don : Phoenix, 2006, p.23).

Such a chamber is equipped with inlet and outlet air channels, an air heater to maintain a temperature of 18-20 ° C during painting, a filter unit, fans and a furnace system for drying in the 60-70 ° C mode and allows to process 3-6 cars per day. The alternation of air-temperature regimes of painting and drying in one chamber leads to an increase in the requirements for sealing the chamber and placing the product during drying in the required air-temperature conditions (see the reference book Painting work in mechanical engineering. Under the general editorship of E.V. Iskra. L .: Mechanical engineering LO, 1984, p.219).

In connection with the above, increasing the efficiency of solving the technical problem of painting and drying a large-sized product in a spray-drying chamber in individual and small-scale production by improving the transportability of the chamber is a technological problem that remains relevant at the present time.

A known installation for painting a car with improved portability, containing several drying chambers, in front of which there are guides to ensure the placement of transport trolleys at the paint station and in front of the entrances to the drying chambers (see RF patent No. 2128088, B05B 15/12, 1999).

However, the improved transportability of this analogue leads to an increase in productivity when using a separate spray booth and several drying chambers with a partial decision to supply a medium-sized product (passenger car), due to the requirement in this analog that the product is self-propelled.

As a prototype of the claimed device for painting large-sized products, a camera without a roof was chosen for painting large products in small-scale production workshops with the product being fed into the chamber from above by a bridge crane, air from the workshop through the top of the chamber and lower exhaust ventilation (see the Handbook for Coating in Mechanical Engineering. Edited by M.M. Goldberg, Moscow: Mashinostroenie, 1974, p.448).

The main disadvantage of the prototype is the transportability of the chamber, which caused the leaky design of the chamber without a roof, eliminating the possibility of alternating painting and drying of a large product in one chamber and worsening the air-temperature conditions of painting the product.

The technical result of the invention is to increase the efficiency of painting and drying of large-sized products by improving the transportability of equipment, leading to the possibility of technological and high-quality processing of large-sized products in a spray-drying chamber.

The specified technical result is achieved in that in the device for painting large-sized products, which is a chamber with an upper air supply, lower exhaust ventilation and a transport opening for supplying products, equipped with a movable elevator of a large-sized product and means for supplying and spraying paint, the camera has a closed-type periodic construction actions with the filtration of the air coming from above and the heating necessary for painting it and the combustion system for maintaining the air temperature inside and cameras in the drying mode of a large product.

In this case, on the chamber floor and on the loading platform in front of it, a central guide groove is made, located along the direction of movement of the movable lift, and the latter consists of two or more supporting frames located separately from each other along the specified groove, mounted on the running wheels and each carrying its own cargo a platform connected to the frame by two parallel articulated lever mechanisms for lifting a platform of the "Nuremberg scissors" type.

Each supporting frame is equipped with a longitudinal locking device for moving the movable lift, having two lateral contact rollers at its ends and recessed in the guide groove above its bottom with the possibility of fixation by contact rollers on the side walls of the groove, pneumatic lifting platform of the cargo platform, made in the form of two parallel between the specified articulated lever mechanisms in a vertical plane transverse to the direction of movement of the movable lift, power mechanisms mounted from flexible pneumatic shells connected to a source of compressed air, and two side frame-box fuses installed above the floor at a short distance from it, against lateral overturning of the mobile elevator, which simultaneously perform the function of stabilizing the stability of the mobile elevator structure.

Moreover, the supporting frames are interconnected by a sliding tubular clamp of the distance between them, determined by the length of the large-sized product, one of the supporting frames being equipped with a pneumatic actuator for moving the movable lift, and a common source of compressed air is connected to the pneumatic actuators for lifting the loading platforms and the pneumatic actuator for moving the movable lift, which provides air supply mode necessary to synchronize the lifting of cargo platforms.

To ensure a stable resource of the proposed device, each freight platform is equipped with a means of protecting the movable lift from staining.

In this case, the means of protecting the movable lift from coloring can be made in the form of sliding side curtains attached to each cargo platform on horizontal cables stretched around its perimeter, protecting both the articulated-lever mechanisms of lifting the cargo platform and both power mechanisms of the pneumatic drive for lifting the cargo platform, or in the form of removable vertical side screens attached to each cargo platform, protecting both articulated linkage lifting mechanisms of the cargo platform against staining Rma and both power mechanisms of the pneumatic drive lifting the cargo platform.

To expand the transport capabilities, the longitudinal motion locks of the movable lift are removable with their fastening to the lower ends of the two angular protrusions under the support frames using a threaded connection.

To increase the coloring area of the lower surface of the oversized product to be painted, support beams are installed on the loading platforms having a cross section defining a small contact area of contact between the support beams and the large-sized product.

In a particular design, each of the two articulated lever lifting mechanisms of the loading platform has, on the one hand, a fixed articulated fixation of the first ends of the two levers on the support frame and the loading platform, and on the other hand, the second ends of these levers are placed in the horizontal guide recesses of the supporting frame and the loading platform with the possibility of movement in them using rolling bearings, while the supporting frame is equipped with vertical profile supports for landing the cargo platform in the initial lower position and iksatorami position of the loading platform, constructed as limiters of moving ends of the arms of the two hinged-lever mechanisms inserted into hole portion for moving said support frame ends.

At the same time, each power mechanism of the pneumatic drive for lifting the cargo platform is made in the form of a three-section bellows-type pneumatic cylinder, which is fixed with its lower and upper plates, respectively, in the lower and upper horizontal frames of the power mechanism, having in their planes on both sides of the frame a central lateral articulation, respectively, in pairs of lower and upper sliding half-arms of two articulated lever lifting mechanisms of the cargo platform, and on the lower and upper frames of each power mechanism akreplen sliding centering stabilizer is straight lower and upper plates of the air, made in the form of a pair of nested one inside the other two vertical profile pipes.

With the design of the movable lift on two support frames on the leading support frame with a pneumatic drive for moving the movable lift in the form of a pneumatic motor, which has a kinematic connection through the gearbox with the running wheels of the specified supporting frame, a pneumatic control system is installed that includes two pneumatic distributors connected to their inputs with the outputs of the pneumotroje connected with its input to the output of a stationary source of compressed air with a flexible length margin a pipeline, for example a hose, between them, which ensures the working movement of the movable lift, while the first pneumatic distributor is connected by two outputs to two inputs of the pneumatic motor, setting the direction of its revolutions, and the second pneumatic distributor, which works on the inlet and vent of compressed air, is connected by the output to the inlet of the pneumatic connected by two outputs via a pneumatic throttle, providing synchronization of lifting of the loading platforms, with the inputs of two pneumotrojeks placed on two supporting frames and provide their outputs connected to the inputs of the lower ends of the two flexible pnevmoobolochek on each support frame, a supply of compressed air or reset.

Moreover, in the hose connection section of one of the pneumatic throttles located on the leading support frame, with the pneumotrojector located on the driven support frame, the hose has a length margin for adjusting the distance between the leading and driven support frames depending on the length of the large-sized product.

To improve the operating conditions at the hose connection section of one of the pneumatic throttles located on the leading support frame with the pneumotrojector located on the driven support frame, the hose has a length margin for adjusting the distance between the leading and driven support frames depending on the length of the large product or is made integral with an intermediate hose having a step length in the interval of the run-up of the lengths of large-sized products and introduced into the specified hose connection using two quick-disconnect pneumatic connectors carriers, or for the transport use of one leading support frame in the hose connection section of one of the pneumatic throttles located on the leading support frame with a pneumatic gauge located on the driven support frame, a quick disconnect pneumatic connector is introduced.

The use of the proposed movable pneumatic lift in the chamber for painting and drying large-sized products allows to improve the quality of coloring of products and improve the air-temperature conditions of drying due to the possibility of lifting the product in the chamber during these operations, as well as expand the range of raised large-sized products as a result of the extension of its interval lengths limited only by the length of the spray booth.

Figure 1 shows a General view (in perspective view) of the inventive device for painting large products, which is a camera for painting and drying (the door of the camera is not shown) with a movable pneumatic lift; figure 2-4 - a movable pneumatic lift of the inventive device with cargo platforms, respectively, in the initial (lower) and working (upper) position and loaded with a long side car body; figure 5 is one of two power mechanisms for pneumatic lifting of the cargo platform on the support frame as part of the proposed movable pneumatic lift; figure 6 - one of two articulated link mechanisms in the working (extended) position and two of the four lateral vertical profile supports for landing the cargo platform in the initial lower position on the supporting frame of the proposed movable pneumatic lift; Fig.7 is one of two nodes fixing the position of the cargo platform on the supporting frame of the proposed movable pneumatic lift; on Fig - pneumatic movement of the proposed movable pneumatic lift on its leading support frame; figure 9 is a diagram of a pneumatic control system of the proposed movable pneumatic lift; figure 10 - control panel with two pneumatic distributors on the leading support frame as part of the pneumatic control system of the proposed movable pneumatic lift.

The proposed device for painting large products (see figure 1) contains a closed chamber 1 of periodic action with one entry-exit opening 2, equipment for the upper air flow, its filtration, necessary for painting the heating, lower exhaust ventilation, combustion system for maintaining air temperature inside a chamber with a closed door in the drying mode and means for supplying and spraying paint (in Fig. 1, the chamber door and the equipment listed are not shown).

The composition of the proposed device also includes a movable pneumatic lift 3 (see Fig. 1), for a fixed movement of which on the floor of the chamber 1 and on the loading platform in front of it there is a central guide groove 4 located along the direction of movement of the lift 3.

Mobile pneumatic lift 3 (see Fig.1-3) consists in the present example of the proposed device from two separately separated from each other along the guide groove 4 of the supporting frames 5 mounted on the running wheels 6.

Each supporting frame 5 carries its own loading platform 7, connected with the frame 5 by two parallel articulated lever mechanisms 8 for lifting the loading platform 7 of the "Nuremberg scissors" type.

Moreover, each supporting frame 5 is provided with a longitudinal lock 9 for moving the elevator 3, having two lateral contact rollers 10 at their ends, recessed in the guide groove 4 above its bottom with the possibility of fixation by the rollers 10 on the side walls of the groove 4 and made removable with fastening to the lower the ends of the two corner protrusions 11 under the support frame 5 using a threaded connection.

In addition, each supporting frame 5 is equipped with a pneumatic drive for lifting the cargo platform 7 (see Fig.2-3), made in the form of two parallel located between the articulated lever mechanisms 8 in a vertical plane transverse to the direction of movement of the elevator 3, power mechanisms mounted each from a three-section air bellows 12 bellows type, which is fixed with its lower 13 and upper 14 plates (see figure 5), respectively, in the lower 15 and upper 16 horizontal frames of the power mechanism, having in their planes from two sides he frames the central lateral articulation fixation, respectively, in pairs of the lower 17 and upper 18 sliding half-arms of two articulated lever mechanisms 8.

At the same time, on the lower 15 and upper 16 frames of each power mechanism, a sliding centering stabilizer is fixed without distortions of the lower 13 and upper 14 plates of the air cylinder 12, made in the form of a pair of two vertical profile pipes 19 and 20 inserted into each other (see Fig. 6).

Finally, to each supporting frame 5 are two side frame-box guards 21 mounted above the floor at a short distance from the side tipping of the lift 3 with a large product, in particular with a long side car body 22 (see FIG. 4).

Each of the two articulated linkages 8 (see FIGS. 2-3) on the support frame 5 has, on the one hand, a fixed hinged fixation of the first ends 23 of the two levers on the support frame 5 and the loading platform 7 and, on the other hand, the placement of the second ends 24 of these levers in horizontal guide recesses 25 of the support frame 5 and the loading platform 7 with the possibility of moving into them using the rolling bearings 26.

In this case, the supporting frame 5 is provided with four vertical profile supports 27 (see FIG. 6) for landing the cargo platform 7 in the initial lower position and with the position clamps of the cargo platform 7 made in the form of stops 28 (see FIG. 7) for moving the movable ends 24 levers of two articulated link mechanisms 8, inserted into the holes 29 of the support frame 5 at the site of movement of the ends 24.

Both support frames 5 of the elevator 3 are interconnected by a sliding tubular retainer 30 (see Fig.2-3) the distance between them, determined by the length of the large product, one of the supporting frames 5 (leading) is equipped with a fuse box mounted on one of the side 21 by the pneumatic actuator for moving the elevator 3, consisting of an air motor 31 and a reducer 32 kinematically connected with the axis of one of the pair of running wheels 6 rigidly mounted on it (see Fig. 8).

A common stationary source of compressed air is connected to the pneumatic motor 31 of the pneumatic drive for moving the lift 3 and to the inlet 33 in the lower plate 13 of each of the four pneumocylinders 12 (see Fig. 5), which provides the mode the air supply necessary to synchronize the lifting of two cargo platforms 7 with a large-sized painted product - a long side car body 22 (see figure 4).

Hose pneumatic control system (see Fig. 9) with a pneumatic control panel 34 (see Fig. 10) is installed on the leading support frame 5 and includes two pneumatic distributors 35 and 36, equipped with on / off handles 37 and 38 and connected to their inputs with the outputs of the pneumoticker 39, connected by its inlet to the outlet of a stationary source of compressed air with a margin of length of the connecting hose between them, providing working movement of the lift 3.

The pneumatic distributor 35 is connected by two outputs with two inputs of the air motor 31, defining the direction of its revolutions, and the pneumatic distributor 36, which works for the inlet and vent of compressed air, is connected by the output to the inlet of the pneumatic valve 40, connected by two outputs through the pneumatic throttle 41 and 42, providing synchronization of the lifting of two cargo platforms 7, respectively, with the inlets of pneumatic units 43 and 44, placed one at a time on two support frames 5 and providing their outputs connected to inputs 33 in the lower plates 13 of two air moballon 12 on each support frame 5, the supply or discharge of compressed air.

In the hose connection section of the pneumatic throttle 41 located on the leading support frame 5 with the pneumatic damper 43 located on the driven support frame 5, the hose has a length margin for regulating the distance between the indicated supporting frames depending on the length of the large-sized product and a quick-disconnect pneumatic connector for transport use of one leading the supporting frame 5 or is made integral with an intermediate hose 45 having a step length in the interval of the run-up lengths of large-sized products and inserted into the specified hose connection using two quick-release pneumatic connectors 46 (see Fig.9).

Each cargo platform 7 can be equipped with a means of protecting the movable lift 3 from staining (not shown in the figures), made in the form of sliding side curtains attached to each cargo platform 7 on horizontal cables stretched around its perimeter, protecting both articulated lever mechanisms 8 from painting lifting the cargo platform and both power mechanisms of the pneumatic drive lifting the cargo platform 7, or in the form of 7 removable vertical side screens attached to each cargo platform, protecting from painting Both the articulated lever mechanisms 8 for lifting the cargo platform 7 and both power mechanisms for the pneumatic drive for lifting the cargo platform.

To increase the coloring area of the lower surface of the oversized product to be painted, support beams (not shown in the figures) having a cross section defining a small contact contact area of the support beams with a large-sized product can be installed on freight platforms 7.

The operation of the proposed device for painting large items is as follows.

Oversized product - a long on-board car body 22 (see Fig. 4) using loading means, for example a truck crane, is placed with a long side along the guide groove 4 on the loading platform in front of the entrance / exit opening 2 of the chamber 1 onto two cargo platforms 7, which are located in the initial lower position (see figure 2), and by turning on the handle 37 on the remote control 34, the pneumatic actuator moves the lift 3, which, as a result of the actuation of the pneumatic control system with a compressed air pressure of 6 atm, provides rolling of both support frames 5 into the opening 2 of the camera 1.

Using the handle 38 on the pneumatic control panel 34, the pneumatic drive for lifting the cargo platforms 7 is turned on, which, as a result of the proposed hose pneumatic control system with a compressed air pressure of 6 atm, provides a smooth and synchronous lifting of two cargo platforms 7 with the body 22 to a height determined by the conditions of the multilateral body painting technology by means of mechanical and manual painting (spray guns and air guns).

After painting the specified large-sized product while maintaining moderately warm (18-20 ° C) ventilated air in the chamber 1 with the door of the opening 2 closed, the air flow temperature is set to 70-80 ° C and the body is dried on the loading platforms 7 in the working upper position (see figure 3).

Currently produced domestic and foreign industrial spray booths have a length of 10, 12, 15, 18, 24, 28, 32 and more meters, and the use of Norgren air cylinders is characterized by a stable resource of their operation at temperatures up to 115 ° C , which confirms the industrial applicability of the claimed invention and the prospects for its application.

The proposed device is a spray-drying chamber with a movable pneumatic lift that improves the manufacturability and quality of painting and drying of inconvenient large-sized products due to their safe movement and lifting to a height that is advantageous for access during painting and to maintain air-temperature conditions during drying.

Claims (12)

1. A device for painting large-sized products, which is a chamber with upper air flow and lower exhaust ventilation and a transport opening for supplying products, while the camera is equipped with a movable elevator of a large-sized product and means for supplying and spraying paint, characterized in that the camera has a closed type design periodic action with filtration of the air coming from above and the heating necessary for painting it and the furnace system for maintaining the air temperature inside the chamber in the mode drying a large product, and on the chamber floor and on the loading platform in front of it there is a central guide groove located along the direction of movement of the movable lift, the latter consisting of two or more support frames mounted separately from each other along the groove mounted on the running wheels and supporting each cargo platform connected to the frame by two parallel articulated lever mechanisms for lifting the Nuremberg scissors platform, with each op The main frame is equipped with a longitudinal locking device for moving the movable lift, having two lateral contact rollers at its ends and recessed in the guide groove above its bottom with the possibility of fixation by contact rollers on the side walls of the groove, pneumatic lifting platform of the load platform, made in the form of two parallel located between the indicated articulated lever mechanisms in a vertical plane transverse to the direction of movement of the movable lift, power mechanisms mounted from flexible pneumatic casings connected to a source of compressed air and two side frame-box guards against lateral overturning of a mobile elevator installed above a floor at a short distance from it, which simultaneously perform the function of stabilizing the stability of a mobile elevator structure, and the supporting frames are interconnected by a sliding tubular distance lock between them determined by the length of the large-sized product, one of the supporting frames being equipped with a pneumatic drive for moving the movable lift and a common source of compressed air is connected to the pneumatic drives for lifting the loading platforms and the pneumatic drive for moving the movable lift through a pneumatic control system providing the air supply mode necessary to synchronize the lifting of the loading platforms. 2. The device according to claim 1, characterized in that each cargo platform is equipped with a means of protecting the movable lift from painting. 3. The device according to claim 2, characterized in that the means of protecting the movable lift from painting is made in the form of sliding side curtains attached to each cargo platform on horizontal cables stretched around its perimeter, protecting both the articulated linkage lifting mechanisms of the cargo platform and both power mechanism for pneumatic lifting of the loading platform. 4. The device according to claim 2, characterized in that the means of protecting the movable lift from painting is made in the form of removable vertical side screens attached to each cargo platform, protecting both the articulated lever mechanisms of lifting the cargo platform and both power mechanisms of the pneumatic drive lifting the cargo platform . 5. The device according to claim 1, characterized in that the longitudinal motion locks of the movable lift are removable with their fastening to the lower ends of the two angular protrusions under the support frames using a threaded connection. 6. The device according to claim 1, characterized in that on the loading platforms, support beams are installed having a cross section defining a small support contact area of the support beams with a large-sized product. 7. The device according to claim 1, characterized in that each of the two articulated lever lifting mechanisms of the loading platform has, on the one hand, a fixed hinged fixation of the first ends of the two levers on the support frame and the loading platform and, on the other hand, placing the second ends of these levers in horizontal guide recesses of the support frame and the loading platform with the possibility of moving into them with the help of rolling bearings, while the supporting frame is equipped with vertical profile supports for landing the loading platform in the initial lower position and position locks of the cargo platform, made in the form of limiters for moving the movable ends of the levers of two articulated link mechanisms inserted into the openings of the support frame at the displacement section of these ends. 8. The device according to claim 1, characterized in that each power mechanism of the pneumatic drive for lifting the cargo platform is made in the form of a three-section bellows-type pneumatic cylinder, which is fixed with its lower and upper plates, respectively, in the lower and upper horizontal frames of the power mechanism, having in their planes with on both sides of the frame, the central lateral articulation, respectively, in pairs of lower and upper sliding half-arms of two articulated lever mechanisms for lifting the cargo platform, while on the lower and In the frames of each power mechanism, a sliding centering stabilizer is fixed without distortions of the lower and upper plates of the air cylinder, made in the form of a pair of two vertical profile pipes inserted into one another. 9. The device according to claim 1, characterized in that, in the design of the movable lift on two support frames on the leading support frame with a pneumatic drive for moving the movable lift in the form of a pneumatic motor, which has a kinematic connection through the gearbox with the running wheels of the specified support frame, is installed pneumatic control piping system, including two pneumatic valves, connected by their inputs to the outputs of the pneumatic device, connected by its input to the output of a stationary source of compressed air air with a margin of length for a flexible connecting pipe, for example, a hose between them, ensuring working movement of the movable elevator, while the first air distributor is connected by two outlets to two air motor inlets that specify the direction of its revolutions, and the second air distributor, which works to inlet and vent compressed air, is connected by an output with the inlet of the pneumotrojector connected by two exits through the pneumatic throttle, providing synchronization of the lifting of the cargo platforms, with the inputs of two pneumotro nicks placed one on the two support frames and provide their outputs connected to inputs of the lower ends of two flexible pnevmoobolochek on each support frame, supply or discharge of compressed air. 10. The device according to claim 9, characterized in that in the hose connection section of one of the pneumatic throttles located on the leading support frame, with a pneumotrojector located on the driven support frame, the hose has a length margin for adjusting the distance between the leading and driven supporting frames depending from the length of a large product. 11. The device according to claims 9 and 10, characterized in that a quick-disconnect pneumatic connector is introduced in the hose connection section of one of the pneumatic throttles located on the leading support frame with a pneumatic tester located on the driven support frame. 12. The device according to claim 9, characterized in that the section of the hose connection of one of the pneumatic throttles located on the leading support frame, with a pneumotrojector located on the driven support frame, is made integral with an intermediate hose having a step length in the interval of the run-up length of large-sized products and introduced into the specified hose connection using two quick-release pneumatic connectors.

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