A drying apparatus for a cigarette embossed liner paper

Abstract

The utility model provides a kind of drying equipment for cigarette embossed lining paper, belong to tobacco packaging equipment technical field, including machine case shell, the inside fixed mounting of machine case shell is used to the drying assembly for the double-sided drying of cigarette embossed lining paper, the top fixed mounting of drying assembly is used to prevent wrinkle anti-wrinkle component.The utility model when cigarette embossed lining paper enters machine case shell from inlet, is transmitted forward along conveyer belt, and the surface of conveyer belt is precisely machined with matrix air-permeable grid, can ensure that lining paper upper and lower surface is synchronously exposed in drying chamber;At this time, infrared radiation heating pipe is powered on to emit specific wavelength infrared rays, directly radiate lining paper upper and lower surface to form radiation heat transfer, while matrix air-permeable grid allows hot air to penetrate material inside to generate convective heat transfer, realize single pass to complete double-sided uniform drying, and finally dried lining paper is conveyed to discharge outlet by conveyer belt and is output.

Description

Technical Field

[0001] This utility model relates to the field of tobacco packaging equipment technology, and more specifically, to a drying device for embossed inner lining paper for cigarettes. Background Technology

[0002] Embossed inner lining paper for cigarettes, as the core moisture-proof material for cigarette packaging, is made of aluminum foil composite paper. Its surface smoothness is a key factor in determining the packaging's wrinkle resistance. Currently, the rapid drying equipment used in the industry has two major technical bottlenecks: insufficient heating uniformity and an imperfect moisture removal mechanism. These problems not only prolong the drying cycle but also cause quality defects such as deformation and cracking of the inner lining paper due to local overheating or insufficient drying, resulting in a decrease in product qualification rate and an increase in energy consumption. Therefore, the industry urgently needs to develop new drying equipment to overcome the limitations of existing technology.

[0003] A search revealed that Chinese Patent Publication No. CN216282591U discloses "a rapid drying device for cigarette liner paper, comprising a base, two bases, each base having a hydraulic rod fixedly connected to its top, and a rotating drum rotatably connected between the side walls of the two hydraulic rods near their center. A heating module is fixedly connected to the inner side wall of the rotating drum, which heats the drum to dry the cigarette liner paper. This invention, through the cooperation of the rotating rods, pressure rollers, and hydraulic rods, allows the operator to adjust the hydraulic rods to make the pressure rollers press the cigarette liner paper on the surface of the rotating drum, making the cigarette liner paper smoother and preventing wrinkles." However, it still has the following drawbacks:

[0004] (1) In actual use, the heating module of the device is only distributed on the inner wall of the rotating drum, resulting in uneven axial temperature distribution of the rotating drum. Low temperature zones will appear in the edge area due to heat radiation attenuation, causing inconsistent drying of the inner lining paper.

[0005] (2) In actual use, the hydraulic rod directly drives the pressure roller, and the rigid connection causes the rolling pressure to be linearly distributed, resulting in uneven pressure on the pressure roller and affecting the pleating effect. To address this, a drying device for embossed inner lining paper for cigarettes is proposed. Utility Model Content

[0006] The purpose of this invention is to address the problems in existing devices where the heating module is only distributed on the inner wall of the rotating drum, resulting in uneven axial temperature distribution and low-temperature zones at the edges due to heat radiation attenuation, leading to inconsistent drying of the inner liner paper; and where the hydraulic rod directly drives the pressure roller, resulting in a linear distribution of pressing pressure and uneven pressure on the pressure roller, thus affecting the pleating effect. This invention provides a drying device for embossed inner liner paper for cigarettes, thereby solving the problems mentioned in the background art.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0008] The present invention is as follows: a drying device for embossed inner liner paper for cigarettes, comprising a housing, wherein a drying component for double-sided drying of embossed inner liner paper for cigarettes is fixedly installed inside the housing, and an anti-wrinkle component for preventing wrinkles is fixedly installed on the top of the drying component.

[0009] The drying assembly includes a drying chamber fixedly installed inside a housing. Infrared radiation heating tubes are symmetrically arranged vertically inside the drying chamber. A feed inlet is opened on one side of the housing, and a discharge outlet is opened on the side of the housing away from the feed inlet. A perforated frame is fixedly installed inside the housing, and a conveyor belt is fixedly installed on the top of the perforated frame. The surface of the conveyor belt is precisely machined with a matrix-shaped breathable mesh. Support legs are fixedly installed on both sides of the perforated frame.

[0010] As a preferred technical solution of this utility model, the anti-wrinkle component includes a support plate fixedly installed on one side of the support leg, a bracket fixedly installed on the top of the support plate, a first placement plate fixedly installed on one side of the bracket, a servo motor fixedly installed on the top of the first placement plate, two rotating shafts rotatably installed on the inner side of the bracket, rubber cylinders rotatably installed on the two rotating shafts, a first gear and a second gear fixedly installed on one end of the two rotating shafts respectively, the first gear and the second gear meshing with each other, and the first gear being connected to the output end of the servo motor.

[0011] As a preferred technical solution of this utility model, a second placement plate is fixedly installed on one side of the casing, and a suction fan is fixedly installed on the top of the second placement plate. The air inlet of the suction fan is connected to the drying chamber, and the air outlet of the suction fan is connected to an air outlet pipe. A dehumidification box is fixedly installed at one end of the air outlet pipe, and a return air pipe is fixedly installed on one side of the dehumidification box and is connected to the drying chamber.

[0012] As a preferred technical solution of this utility model, a temperature and humidity sensor is provided on the inner wall of the drying chamber, and the temperature and humidity sensor is linked with the power adjustment module of the infrared radiation heating tube through an external control unit.

[0013] As a preferred technical solution of this utility model, the side wall of the chassis shell is provided with an observation window mounting opening, a double-layer high-temperature resistant observation window is fixedly installed on the observation window mounting opening, and a silicone sealing strip is provided on the edge of the observation window mounting opening.

[0014] As a preferred technical solution of this utility model, a storage groove is provided on one side of the chassis shell, a partition plate is fixedly installed inside the storage groove, a storage door is hinged to the storage groove, and a mechanical lock is provided on one side of the storage door.

[0015] As a preferred technical solution of this utility model, two pull-out grooves are provided on one side of the chassis shell, and drawer boxes are slidably installed on both pull-out grooves.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. By setting up the drying components, when the equipment is running, the embossed inner lining paper for cigarettes to be dried enters the machine housing from the feed port and is transported forward along the conveyor belt laid on the top of the hollow frame. The conveyor belt is made of polytetrafluoroethylene coated glass fiber substrate with a matrix-shaped breathable mesh precisely machined on the surface. It can withstand a continuous working temperature of over 200℃ and ensure that the upper and lower surfaces of the inner lining paper are exposed to the drying chamber simultaneously. At this time, the infrared radiation heating tubes arranged symmetrically on the upper and lower sides are energized to emit infrared rays of a specific wavelength, which directly radiate the upper and lower surfaces of the inner lining paper to form radiative heat transfer. At the same time, the matrix-shaped breathable mesh allows hot air to penetrate the interior of the material to generate convective heat transfer. Under the combined effect of the two, double-sided uniform drying can be completed in a single pass. Finally, the dried inner lining paper is conveyed to the discharge port for output via the conveyor belt.

[0018] 2. By setting up anti-wrinkle components, when in use, the servo motor fixed on the support plate is started, and its output end drives the first gear connected to it to rotate. Since the first gear and the second gear mesh with each other, the second gear rotates in the opposite direction, thereby driving the rubber cylinders on the two rotating shafts on the inner side of the bracket to rotate in opposite directions. When the inner lining paper passes between the two rubber cylinders, the opposing rotating rubber cylinders will apply uniform pressure to the surface of the inner lining paper. The pressure can be controlled by adjusting the speed of the servo motor. Through the rolling and pressing action, the wrinkles of the inner lining paper caused by local shrinkage, thermal stress or uneven transmission are effectively smoothed, ensuring that the dried inner lining paper remains flat. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a drying device for embossed inner liner paper for cigarettes provided by this utility model;

[0020] Figure 2 Right view of a drying device for embossed inner liner paper for cigarettes provided by this utility model;

[0021] Figure 3 This utility model provides a drying device for embossed inner liner paper used in cigarettes. Figure 2 A schematic diagram of the three-dimensional cross-sectional structure at point AA;

[0022] Figure 4A schematic diagram of the structure of a storage groove for a drying device for embossed inner liner paper of cigarettes provided by this utility model;

[0023] Figure 5 This utility model provides a drying device for embossed inner liner paper used in cigarettes. Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a structural diagram of a dehumidification box for a drying equipment for embossed inner lining paper used in cigarettes, provided by this utility model.

[0025] The diagram shows: 1. Chassis shell; 2. Drying assembly; 3. Anti-wrinkle assembly; 201. Drying chamber; 202. Infrared radiation heating tube; 203. Feed inlet; 204. Discharge outlet; 205. Hollow frame; 206. Conveyor belt; 207. Matrix-shaped breathable mesh; 208. Support leg; 301. Support plate; 302. Bracket; 303. First placement plate; 304. Servo motor; 305. Rotating shaft; 306. Rubber cylinder; 307. First gear; 308. Second gear; 4. Second placement plate; 5. Fan; 6. Air outlet duct; 7. Dehumidification box; 8. Temperature and humidity sensor; 9. Observation window mounting port; 10. Double-layer high-temperature resistant observation window; 11. Silicone sealing strip; 12. Storage groove; 13. Divider plate; 14. Storage door; 15. Mechanical lock; 16. Pull-out groove; 17. Drawer box; 18. Return air duct. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0027] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] like Figure 1As shown, this embodiment proposes a drying device for embossed inner liner paper for cigarettes, including a housing 1. A drying component 2 for double-sided drying of embossed inner liner paper for cigarettes is fixedly installed inside the housing 1. An anti-wrinkle component 3 for preventing wrinkles is fixedly installed on the top of the drying component 2.

[0031] like Figure 3 As shown, the drying assembly 2 includes a drying chamber 201 fixedly installed inside the casing 1. Infrared radiation heating tubes 202 are symmetrically arranged vertically inside the drying chamber 201. An inlet 203 is opened on one side of the casing 1, and an outlet 204 is opened on the side of the casing 1 away from the inlet 203. A perforated frame 205 is fixedly installed inside the casing 1, and a conveyor belt 206 is fixedly installed on the top of the perforated frame 205. The surface of the conveyor belt 206 is precision-machined with a matrix-shaped permeable mesh 207, which allows hot air to penetrate the material, forming a radiation-convection composite heat transfer mode. Uniform drying on both sides can be completed in a single pass. Support legs 208 are fixedly installed on both sides of the perforated frame 205. During operation, the tobacco to be dried is... Embossed inner lining paper enters the machine housing 1 through the feed port 203 and is conveyed forward along the conveyor belt 206 laid on the top of the hollow frame 205. The conveyor belt 206 is made of polytetrafluoroethylene coated glass fiber substrate with a matrix-shaped breathable mesh 207 precisely machined on the surface. It can withstand a continuous working temperature of over 200°C and ensure that the upper and lower surfaces of the inner lining paper are simultaneously exposed in the drying chamber 201. At this time, the infrared radiation heating tubes 202 arranged symmetrically on the upper and lower sides are energized to emit infrared rays of a specific wavelength, which directly radiate the upper and lower surfaces of the inner lining paper to form radiative heat transfer. At the same time, the matrix-shaped breathable mesh 207 allows hot air to penetrate the interior of the material to generate convective heat transfer. Under the combined effect of the two, double-sided uniform drying can be completed in a single pass. Finally, the dried inner lining paper is conveyed to the discharge port 204 for output via the conveyor belt 206.

[0032] like Figure 5As shown, the anti-wrinkle component 3 includes a support plate 301 fixedly mounted on one side of a support leg 208, a bracket 302 fixedly mounted on the top of the support plate 301, a first placement plate 303 fixedly mounted on one side of the bracket 302, a servo motor 304 fixedly mounted on the top of the first placement plate 303, two rotating shafts 305 rotatably mounted on the inner side of the bracket 302, and rubber cylinders 306 rotatably mounted on the two rotating shafts 305. A first gear 307 and a second gear 308 are fixedly mounted on one end of each of the two rotating shafts 305. The first gear 307 and the second gear 308 mesh with each other. Through the meshing transmission of the first gear 307 and the second gear 308, the two rubber cylinders 306 are driven to rotate in opposite directions. The output end of the servo motor 304 is connected. When in use, the servo motor 304 fixed on the support plate 301 is started. Its output end drives the first gear 307 connected to it to rotate. Since the first gear 307 and the second gear 308 mesh with each other, the second gear 308 rotates in the opposite direction, thereby driving the rubber cylinders 306 on the two rotating shafts 305 on the inner side of the bracket 302 to rotate in opposite directions. When the inner lining paper passes between the two rubber cylinders 306, the opposing rotating rubber cylinders 306 will apply uniform pressure to the surface of the inner lining paper. The pressure can be controlled by adjusting the speed of the servo motor 304. Through the rolling and pressing action, the wrinkles of the inner lining paper caused by local shrinkage, thermal stress or uneven transmission are effectively smoothed, ensuring that the dried inner lining paper remains flat.

[0033] like Figure 6 As shown, a second placement plate 4 is fixedly installed on one side of the casing 1, and a suction fan 5 is fixedly installed on the top of the second placement plate 4. The air inlet of the suction fan 5 is connected to the drying chamber 201, and the air outlet of the suction fan 5 is connected to the air outlet duct 6. A dehumidification box 7 is fixedly installed at one end of the air outlet duct 6, and a return air duct 18 is fixedly installed on one side of the dehumidification box 7 and is connected to the drying chamber 201. When the suction fan 5 is started, its air inlet continuously draws in the humid and hot air in the drying chamber 201. This air carrying water vapor is transported to the dehumidification box 7 through the air outlet duct 6. The dehumidification box 7 is usually filled with condenser tubes or adsorption materials. When the humid and hot air passes through, the water vapor is condensed or adsorbed and separated. Part of the dried air re-enters the drying chamber 201 through the return air duct 18 to form a circulating air path, and the other part may be discharged outside the equipment. This process reduces the humidity inside the chamber and achieves efficient and energy-saving drying operation.

[0034] like Figure 4As shown, a temperature and humidity sensor 8 is installed on the inner wall of the drying chamber 201. The temperature and humidity sensor 8 is linked to the power adjustment module of the infrared radiation heating tube 202 through an external control unit. During use, the temperature and humidity sensor 8 continuously collects the temperature and humidity data inside the chamber and converts it into electrical signals, which are then transmitted to the external control unit. The external control unit has a built-in preset program (such as target temperature 60-80℃, humidity ≤15%RH). The algorithm compares the real-time data with the set values: if the temperature is detected to be lower than the threshold, it immediately sends a command to the power adjustment module of the infrared radiation heating tube 202 to increase the current output to increase the heating power; if the temperature is close to or exceeds the upper limit, the power is reduced to avoid overheating of the material; at the same time, when the humidity exceeds the set range, the external control unit will accelerate the operation speed of the suction fan 5 to speed up the discharge of hot and humid air to the dehumidification box 7. This closed-loop control mechanism ensures that the drying process always operates under optimal parameters, which not only ensures uniform drying of the inner lining paper on both sides, but also avoids energy waste and achieves precise and efficient temperature and humidity management.

[0035] like Figure 4 As shown, the side wall of the chassis housing 1 has an observation window mounting opening 9, on which a double-layer high-temperature resistant observation window 10 is fixedly installed. A silicone sealing strip 11 is provided at the edge of the observation window mounting opening 9. During use, the double-layer high-temperature resistant observation window 10 is tightly fitted to the housing through the silicone sealing strip 11, forming a sealed structure. The outer high-temperature resistant observation window is typically made of borosilicate glass, possessing excellent high-temperature resistance (withstanding temperatures above 300℃) and thermal shock resistance. The inner layer may be electrochromic glass or ordinary high-temperature resistant glass. A vacuum is drawn or inert gas is filled between the two layers to reduce heat conduction. When the equipment is running, The high-temperature environment inside the drying chamber 201 will significantly increase the temperature of the outer layer of the observation window. However, the double-layer structure and silicone sealing strip 11 effectively block the heat from being transferred to the outside, while preventing the humid and hot air inside the chamber from seeping out from the gaps in the window and avoiding water vapor condensing into fog on the inner surface of the glass. The electrochromic glass can also adjust the light transmittance through voltage and automatically reduce the brightness in strong light environments to ensure that operators can clearly observe the internal drying status. The silicone sealing strip 11 not only plays a sealing role, but also buffers the mechanical vibration during equipment operation and adapts to the deformation of the shell caused by thermal expansion and contraction, thereby providing safe and visual monitoring conditions for equipment operation.

[0036] like Figure 4As shown, a storage recess 12 is provided on one side of the chassis shell 1. A partition plate 13 is fixedly installed inside the storage recess 12. A storage door 14 is hinged to the storage recess 12. A mechanical lock 15 is provided on one side of the storage door 14. When in use, the operator can open the hinged storage door 14 through the mechanical lock 15. The space inside is divided into two independent areas by the partition plate 13, which are used to classify and store equipment maintenance tools (such as screwdrivers and Allen wrenches), spare parts (such as rubber cylinders 306 and conveyor belt 206 mesh plates) or production record books, etc. The partition plate 13 is usually made of high-temperature resistant plastic or aluminum alloy, which can not only avoid metal corrosion, but also withstand the residual heat that may be generated near the chassis. When the storage door 14 is closed, it prevents unauthorized personnel from taking the internal items at will. This design takes into account both convenience and safety, and provides a dedicated material storage space for daily equipment maintenance.

[0037] like Figure 4 As shown, two pull-out recesses 16 are provided on one side of the chassis housing 1. Drawer boxes 17 are slidably installed on both pull-out recesses 16. When in use, the drawer boxes 17 slidably installed in the two pull-out recesses 16 can be pulled out by the operator to conveniently store and retrieve items. The drawer boxes 17 are usually made of high-temperature resistant metal or engineering plastic. They may be equipped with partitions inside to classify and store waste materials generated during the drying process (such as paper scraps and dust) or to temporarily place testing tools (such as thermometers and hygrometers). The sliding guide rails ensure that the drawers can be pushed and pulled out smoothly. Some designs have a self-locking structure to prevent accidental slippage. Their position is close to the bottom of the equipment, which makes use of the chassis space and avoids interfering with the main production process. At the same time, it is convenient for operators to quickly clean up waste materials or retrieve tools, improving equipment maintenance efficiency and site cleanliness.

[0038] Specifically, in use, the embossed inner liner paper drying equipment for cigarettes operates as follows: When the equipment is running, the embossed inner liner paper to be dried enters the casing 1 through the feed inlet 203 and is conveyed forward along the conveyor belt 206 laid on top of the perforated frame 205. The conveyor belt 206 is made of polytetrafluoroethylene coated glass fiber substrate, and the surface is precisely machined with a matrix-shaped breathable mesh 207, which can withstand a continuous working temperature of over 200℃ and ensure that the upper and lower surfaces of the inner liner paper are simultaneously exposed to the drying chamber 201. At this time, the symmetrically arranged infrared radiation heating tubes 202 are energized and emit infrared rays of a specific wavelength, directly radiating the upper and lower surfaces of the inner liner paper to form radiative heat transfer. At the same time, the matrix-shaped breathable mesh 207 allows hot air to penetrate the interior of the material to generate convective heat transfer. Under the combined effect of the two, the drying process can be completed in a single pass. The inner lining paper is dried evenly on both sides. After drying, it is conveyed to the discharge port 204 via conveyor belt 206. The servo motor 304 fixed on the support plate 301 is started, and its output end drives the first gear 307 connected to it to rotate. Since the first gear 307 and the second gear 308 mesh with each other, the second gear 308 rotates in the opposite direction, which in turn drives the rubber cylinders 306 on the two rotating shafts 305 on the inner side of the bracket 302 to rotate in opposite directions. When the inner lining paper passes between the two rubber cylinders 306, the opposing rotating rubber cylinders 306 will apply uniform pressure to the surface of the inner lining paper. The pressure can be controlled by adjusting the speed of the servo motor 304. Through rolling and pressing action, the wrinkles of the inner lining paper caused by local shrinkage, thermal stress or uneven transmission are effectively smoothed, ensuring that the dried inner lining paper remains flat.

[0039] All technical features in this embodiment can be freely combined according to actual needs.

[0040] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A drying device for embossed inner liner paper used in cigarettes, comprising a casing (1), characterized in that, The inside of the casing (1) is fixedly installed a drying assembly (2) for double-sided drying of embossed inner liner paper for cigarettes, and the top of the drying assembly (2) is fixedly installed with an anti-wrinkle assembly (3) for preventing wrinkles. The drying assembly (2) includes a drying chamber (201) fixedly installed inside the casing (1). Infrared radiation heating tubes (202) are symmetrically arranged inside the drying chamber (201). A feed inlet (203) is opened on one side of the casing (1). A discharge outlet (204) is opened on the side of the casing (1) away from the feed inlet (203). A hollow frame (205) is fixedly installed inside the casing (1). A conveyor belt (206) is fixedly installed on the top of the hollow frame (205). A matrix-shaped breathable mesh (207) is precisely machined on the surface of the conveyor belt (206). Support legs (208) are fixedly installed on both sides of the hollow frame (205).

2. The drying equipment for embossed inner liner paper for cigarettes according to claim 1, characterized in that, The anti-wrinkle component (3) includes a support plate (301) fixedly installed on one side of a support leg (208), a bracket (302) fixedly installed on the top of the support plate (301), a first placement plate (303) fixedly installed on one side of the bracket (302), a servo motor (304) fixedly installed on the top of the first placement plate (303), two rotating shafts (305) rotatably installed on the inner side of the bracket (302), rubber cylinders (306) rotatably installed on the two rotating shafts (305), a first gear (307) and a second gear (308) fixedly installed on one end of the two rotating shafts (305), the first gear (307) and the second gear (308) meshing with each other, and the first gear (307) being connected to the output end of the servo motor (304).

3. The drying equipment for embossed inner liner paper for cigarettes according to claim 1, characterized in that, A second placement plate (4) is fixedly installed on one side of the casing (1). A suction fan (5) is fixedly installed on the top of the second placement plate (4). The air inlet of the suction fan (5) is connected to the drying chamber (201). The air outlet of the suction fan (5) is connected to an air outlet pipe (6). A dehumidification box (7) is fixedly installed at one end of the air outlet pipe (6). A return air pipe (18) is fixedly installed on one side of the dehumidification box (7) and is connected to the drying chamber (201).

4. The drying equipment for embossed inner liner paper for cigarettes according to claim 1, characterized in that, The inner wall of the drying chamber (201) is equipped with a temperature and humidity sensor (8), which is linked to the power adjustment module of the infrared radiation heating tube (202) through an external control unit.

5. The drying equipment for embossed inner liner paper for cigarettes according to claim 1, characterized in that, The side wall of the chassis housing (1) is provided with an observation window mounting port (9), and a double-layer high-temperature resistant observation window (10) is fixedly installed on the observation window mounting port (9). A silicone sealing strip (11) is provided on the edge of the observation window mounting port (9).

6. The drying equipment for embossed inner liner paper for cigarettes according to claim 1, characterized in that, A storage groove (12) is provided on one side of the chassis housing (1). A partition plate (13) is fixedly installed inside the storage groove (12). A storage door (14) is hinged on the storage groove (12). A mechanical lock (15) is provided on one side of the storage door (14).

7. A drying device for embossed inner liner paper for cigarettes according to claim 1, characterized in that, Two pull-out grooves (16) are provided on one side of the chassis housing (1), and drawer boxes (17) are slidably installed on both pull-out grooves (16).

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