Silicon steel sheet splitting machine

Abstract

The utility model relates to the technical field of silicon steel sheet dividing and cutting machines, in particular to a silicon steel sheet dividing and cutting machine which comprises a device body, the device body is provided with a connecting mechanism, the connecting mechanism comprises a winding and attaching assembly arranged on the left section of the device body, and a transmission assembly is arranged on the middle section of the device body. A slitting assembly is arranged on the right section of the device body. Through cooperation of the winding and attaching assembly, the transmission assembly and the slitting assembly, full-process automatic operation of silicon steel sheets from unwinding, conveying, cleaning to slitting is achieved; an upper pressing roller and a middle pressing roller in the winding and attaching assembly ensure that silicon steel sheets are unwound flatly, a cleaning rotating roller of the transmission assembly removes surface sundries, a pneumatic sliding rod and a slitting knife of the slitting assembly accurately control the slitting action, the slitting precision and quality are effectively improved, compared with a traditional slitting mode, the production efficiency is greatly improved, and the production cost is reduced. And errors and material waste caused by manual intervention are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a silicon steel sheet slitting machine technical field especially relates to a silicon steel sheet slitting machine. BACKGROUND

[0002] As the core material of power, electronics and motor industries, the performance of silicon steel sheet directly affects the efficiency and energy consumption of transformer, motor and other equipment. In actual production application, silicon steel sheet needs to be cut into specific size and shape according to different use requirements. The traditional silicon steel sheet cutting method often has the problems of low precision, poor efficiency, insufficient automation degree and the like, which is difficult to meet the requirements of modern industrial production on high precision, high efficiency and high stability of silicon steel sheet cutting. Manual cutting not only has high labor intensity, but also is prone to size deviation, resulting in material waste. Moreover, it is difficult to effectively pretreat and accurately cut the silicon steel sheet, so that the quality of the cut silicon steel sheet is uneven. Therefore, a silicon steel sheet cutting machine is proposed to solve the above problems. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a silicon steel sheet cutting machine, which solves the problems of low precision, poor efficiency, insufficient automation degree and the like of the traditional silicon steel sheet cutting method, which is difficult to meet the requirements of modern industrial production on high precision, high efficiency and high stability of silicon steel sheet cutting. Manual cutting not only has high labor intensity, but also is prone to size deviation, resulting in material waste. Moreover, it is difficult to effectively pretreat and accurately cut the silicon steel sheet, so that the quality of the cut silicon steel sheet is uneven.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a silicon steel sheet cutting machine, comprising a device body, the device body is provided with a connecting mechanism, the connecting mechanism contains the volume component that is arranged in the left segment of the device body, the middle segment of the device body is provided with a transmission assembly, the right segment of the device body is provided with a cutting assembly;

[0005] The transmission assembly contains the material transfer roller one that is rotatably connected in the inner side of the device body, the inner wall of the upper segment of the device body is rotatably connected with the feed roller, the back surface one end of the feed roller is fixedly connected with the handle, the inner side of the middle segment of the device body is drivingly connected with the cleaning roller, the inner wall top of the device body is fixedly installed with the mounting bracket, the bottom of the mounting bracket is fixedly installed with the semicircular cylinder, the right side top of the device body is fixedly installed with the fixed frame, the top of the fixed frame is fixedly installed with the air cylinder, the bottom output end of the air cylinder is fixedly connected with the traction bearing frame, the inner wall of the traction bearing frame is rotatably connected with the material transfer roller two.

[0006] A further improvement is that the winding assembly includes a side plate fixedly connected to the left section of the device body, a drive motor fixedly installed at one end of the back of the side plate, a rotating shaft fixedly connected to the output end of the drive motor, a rotating roller fixedly connected to the outer wall of the rotating shaft, a silicon steel sheet roll wound on the outer wall of the rotating roller, an upper pressure roller rotatably connected to the inner wall of the upper section of the side plate, and a middle pressure roller rotatably connected to the inner wall of the middle section of the side plate.

[0007] A further improvement is that the slitting assembly includes a pneumatic slide rod fixedly connected to the top right side of the device body. A pneumatic slider is slidably connected to the outer wall of the pneumatic slide rod. A traction slide plate is fixedly connected to the outer wall of the pneumatic slider. A clamp is fixedly installed on the top of the traction slide plate. A stop block is fixedly connected to the right section of the clamp. A feed roller is drivenly connected to the inner right side of the device body. A drive roller is slidably connected to the outer wall of the feed roller. A slidable cutting blade is slidably connected to the inner right side of the device body. A receiving plate is fixedly installed on the inner right section of the device body.

[0008] A further improvement is that the outer wall of the transfer roller receives the silicon steel sheet roll at the upper section of the outer wall, and the outer wall of the feed roller abuts against the silicon steel sheet roll at the lower section of the outer wall; the transfer roller is rotatably connected to the inside of the device body, and its outer wall receives the upper section of the silicon steel sheet roll transmitted from the winding assembly, cooperating with the feed roller to control the transmission speed and tension of the silicon steel sheet.

[0009] A further improvement is that the silicon steel sheet roll drive is connected to the outer wall of the lower section of the intermediate pressure roller, and the silicon steel sheet roll drive is connected to the outer wall of the upper section of the upper pressure roller; the upper pressure roller and the intermediate pressure roller are respectively rotatably connected to the inner walls of the upper and middle sections of the side plate, and they apply appropriate pressure to the silicon steel sheet roll to ensure that the silicon steel sheet remains flat and stable during the unwinding process, avoiding wrinkles or deviations, thus laying the foundation for subsequent drive and slitting processes.

[0010] A further improvement is that the slitting blade is pneumatically driven by the inner wall of the device body, and the receiving plate supports the silicon steel sheet roll for material transfer; the slitting blade moves up and down on the inner wall of the device body through pneumatic drive to slit the silicon steel sheet, and the receiving plate on the inner wall of the right section of the device body is used to support the slit silicon steel sheet to prevent it from falling and being damaged.

[0011] A further improvement is that the cleaning roller is used to clean the debris adhering to the outer wall of the silicon steel sheet roll, and the mounting frame is covered by the upper section of the outer wall of the cleaning roller; the cleaning roller on the inner side of the middle section of the device body can effectively remove the debris adhering to the outer wall of the silicon steel sheet roll, ensuring the surface of the silicon steel sheet is clean, and the semi-cylinder at the bottom of the mounting frame is covered by the upper section of the outer wall of the cleaning roller to prevent debris from splashing during the cleaning process.

[0012] By employing the above technical solution, this utility model provides a silicon steel sheet slitting machine, which has at least the following beneficial effects:

[0013] 1. This utility model achieves fully automated operation of silicon steel sheets from unwinding, conveying, cleaning to slitting through the coordinated cooperation of the winding assembly, transmission assembly and slitting assembly; the upper pressure roller and middle pressure roller in the winding assembly ensure that the silicon steel sheets are unwound flat, the cleaning roller in the transmission assembly removes surface debris, and the pneumatic slide bar and slitting knife in the slitting assembly precisely control the slitting action, effectively improving slitting accuracy and quality. Compared with traditional slitting methods, production efficiency is greatly improved, and errors and material waste caused by manual intervention are reduced.

[0014] 2. This utility model slitting machine is equipped with multiple adjustable structures, such as the rotary handle on the feed roller in the transmission assembly, which allows manual adjustment of the silicon steel sheet feed rate; the cylinder drives the second conveyor roller to move up and down, enabling flexible adjustment of the silicon steel sheet transmission pressure and path. These designs allow the slitting machine to adapt to the slitting needs of silicon steel sheets of different specifications and thicknesses; the structure of each component is stable, and the overall layout of the connection mechanism is reasonable, ensuring stable and reliable operation during the slitting process, reducing the frequency of equipment failure, extending service life, and effectively ensuring the continuity and stability of production. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the winding assembly of this utility model;

[0019] Figure 3 This is a partial structural diagram of the transmission component of this utility model;

[0020] Figure 4 This is a partial structural diagram of the slitting component of this utility model.

[0021] In the diagram: 1. Device body; 2. Connecting mechanism; 21. Winding assembly; 211. Side plate; 212. Drive motor; 213. Rotating shaft; 214. Rotating roller; 215. Silicon steel sheet roll; 216. Upper pressure roller; 217. Middle pressure roller; 22. Transmission assembly; 221. Transfer roller one; 222. Feed roller; 223. Rotary handle; 224. Cleaning roller; 225. Mounting frame; 226. Semi-cylinder; 227. Fixing frame; 228. Cylinder; 229. Traction bearing frame; 2210. Transfer roller two; 23. Slitting assembly; 231. Pneumatic slide bar; 232. Pneumatic slider; 233. Traction slide plate; 234. Clamp; 235. Abutment block; 236. Feed roller one; 237. Transmission roller; 238. Slitting knife; 239. Receiving plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Traditional silicon steel sheet slitting methods often suffer from low precision, poor efficiency, and insufficient automation, making it difficult to meet the high precision, high efficiency, and high stability requirements of modern industrial production. Manual slitting is not only labor-intensive but also prone to dimensional deviations, leading to material waste. Furthermore, it fails to provide effective pretreatment and precise slitting of the silicon steel sheets, resulting in inconsistent quality after slitting. This embodiment provides a silicon steel sheet slitting machine; please refer to... Figures 1-4 An embodiment provides a silicon steel sheet slitting machine, including a device body 1. The device body 1 is provided with a connecting mechanism 2. The connecting mechanism 2 includes a winding assembly 21 provided in the left section of the device body 1, a transmission assembly 22 provided in the middle section of the device body 1, and a slitting assembly 23 provided in the right section of the device body 1. The transmission assembly 22 includes a material transfer roller 221 rotatably connected to the inner side of the device body 1. A feed roller 222 is rotatably connected to the inner wall of the upper section of the device body 1. A handle 223 is fixedly connected to one end of the back of the feed roller 222. A cleaning roller 224 is drivenly connected to the inner side of the middle section of the device body 1. A mounting frame 225 is fixedly installed on the top of the inner wall of the device body 1. A semi-cylinder 226 is fixedly installed at the bottom of the mounting frame 225. A fixing frame 227 is fixedly installed on the top right side of the device body 1. A cylinder 228 is fixedly installed on the top of the fixing frame 227. A traction bearing frame 229 is fixedly connected to the bottom output end of the cylinder 228. A material transfer roller 2210 is rotatably connected to the inner wall of the traction bearing frame 229.

[0025] In this embodiment, the slitting component 23 is responsible for slitting the silicon steel sheet. A pneumatic slide bar 231, fixedly connected to the top right side of the device body 1, allows the pneumatic slider 232 to slide along its outer wall. The pneumatic slider 232 drives the traction slide bar 233 to move, thereby enabling the clamp 234 and its right-side abutment 235 to clamp the silicon steel sheet, ensuring the silicon steel sheet remains in a fixed position during slitting. The feed roller 236 on the inner right side of the device body 1 is connected to the transmission roller 237, further transmitting the silicon steel sheet. The slitting blade 238 moves up and down on the inner wall of the device body 1 via pneumatic transmission to slit the silicon steel sheet. The receiving plate 239 on the inner right side of the device body 1 is used to receive the slitted silicon steel sheet, preventing it from falling and being damaged. Throughout the slitting process, the winding component 21 continuously unwinds, the transmission component 22 stably transmits and cleans the silicon steel sheet, and the slitting component 23 precisely slits. All components work closely together to efficiently and accurately complete the silicon steel sheet slitting task.

[0026] Furthermore, the outer wall of the feed roller 221 receives the silicon steel sheet roll 215 on the upper section of the outer wall, and the outer wall of the feed roller 222 abuts against the silicon steel sheet roll 215 on the lower section of the outer wall; the cleaning roller 224 is used to clean the debris adhering to the outer wall of the silicon steel sheet roll 215, and the mounting bracket 225 is covered by the upper section of the outer wall of the cleaning roller 224.

[0027] Furthermore, a pneumatic slider 232 is fixedly connected to the pneumatic slide bar 231 on the top right side of the device body 1. The pneumatic slider 232 can slide along its outer wall, and the pneumatic slider 232 drives the traction slide plate 233 to move, thereby enabling the clamp 234 and the right section of the abutment block 235 to clamp the silicon steel sheet, ensuring that the position of the silicon steel sheet is fixed during the slitting process. The feed roller 236 on the inner wall of the right side of the device body 1 is connected to the transmission roller 237 in a rolling manner to further transmit the silicon steel sheet. The slitting blade 238 moves up and down on the inner wall of the device body 1 through pneumatic transmission to slit the silicon steel sheet. The receiving plate 239 on the inner wall of the right section of the device body 1 is used to receive the slit silicon steel sheet to prevent it from falling and being damaged.

[0028] Example 2

[0029] Based on Embodiment 1, the winding assembly 21 includes a side plate 211 fixedly connected to the left section of the device body 1. A drive motor 212 is fixedly mounted on one end of the back of the side plate 211. A rotating shaft 213 is fixedly connected to the output end of the drive motor 212. A rotating roller 214 is fixedly connected to the outer wall of the rotating shaft 213. Silicon steel sheet coil 215 is wound onto the outer wall of the rotating roller 214. An upper pressure roller 216 is rotatably connected to the inner wall of the upper section of the side plate 211, and a middle pressure roller 217 is rotatably connected to the inner wall of the middle section of the side plate 211. The slitting assembly 23 includes a side plate 211 fixedly connected to the right side of the device body 1. The top pneumatic slide bar 231 is slidably connected to the outer wall of the pneumatic slide bar 231. The outer wall of the pneumatic slide bar 232 is fixedly connected to the traction slide plate 233. The top of the traction slide plate 233 is fixedly installed with a clamp 234. The right section of the clamp 234 is fixedly connected to a stop block 235. The inner wall of the right side of the device body 1 is driven by a feed roller 236. The outer wall of the feed roller 236 is rolled by a transmission roller 237. The inner wall of the right side of the device body 1 is slidably connected to a sliding blade 238. The inner wall of the right section of the device body 1 is fixedly installed with a receiving plate 239.

[0030] In this embodiment, in the winding assembly 21, the side plate 211 is fixedly installed on the left section of the device body 1 to provide stable support for the assembly; the drive motor 212 is installed on the back of the side plate 211, and the rotating shaft 213 at its output end drives the rotating roller 214 to rotate, and the silicon steel sheet roll 215 is wound around the outer wall of the rotating roller 214; the upper pressure roller 216 and the middle pressure roller 217 are respectively rotatably connected to the upper and middle inner walls of the side plate 211, and they apply appropriate pressure to the silicon steel sheet roll 215 to ensure that the silicon steel sheet remains flat and stable during the unwinding process, avoiding wrinkles or deviations, and laying the foundation for subsequent transmission and slitting processes; the transmission assembly 22 plays the role of transmitting and pre-processing silicon steel sheets throughout the slitting process; the material transfer roller 221 is rotatably connected to the inner side of the device body 1, and its outer wall receives the upper section of the silicon steel sheet roll 215 transmitted from the winding assembly 21. In conjunction with the feed roller 222, the transmission speed and tension of the silicon steel sheet are controlled. The feed roller 222 is rotatably connected to the inner wall of the upper section of the device body 1. The handle 223 at one end of its back can manually adjust the speed of the feed roller 222, thereby flexibly controlling the feed amount of the silicon steel sheet. The cleaning roller 224 on the inner side of the middle section of the device body 1 can effectively remove the debris attached to the outer wall of the silicon steel sheet roll 215, ensuring the cleanliness of the silicon steel sheet surface. The semi-cylinder 226 at the bottom of the mounting frame 225 covers the outer wall of the upper section of the cleaning roller 224, which can prevent debris from splashing during the cleaning process. The cylinder 228 installed on the fixed frame 227 on the top right side of the device body 1 has a traction bearing frame 229 at its bottom output end that drives the second transfer roller 2210 to move up and down. In conjunction with the first transfer roller 221 and the feed roller 222, the transmission path and pressure of the silicon steel sheet are precisely adjusted.

[0031] Furthermore, the silicon steel sheet coil 215 is driven to the lower outer wall of the intermediate pressure roller 217, and the silicon steel sheet coil 215 is driven to the upper outer wall of the upper pressure roller 216; the slitting knife 238 is pneumatically driven to the inner wall of the device body 1, and the receiving plate 239 receives the silicon steel sheet coil 215 for material transfer.

[0032] Furthermore, the upper pressure roller 216 and the middle pressure roller 217 are rotatably connected to the upper and middle inner walls of the side plate 211, respectively. They apply appropriate pressure to the silicon steel sheet coil 215 to ensure that the silicon steel sheet remains flat and stable during the unwinding process, avoiding wrinkles or deviations, thus laying the foundation for subsequent transmission and slitting processes. The transmission assembly 22 plays the role of transmitting and pre-treating the silicon steel sheet throughout the slitting process. The feed roller 221 is rotatably connected to the inner side of the device body 1, and its outer wall receives the upper section of the silicon steel sheet coil 215 transmitted from the winding assembly 21. It cooperates with the feed roller 222 to control the transmission speed and tension of the silicon steel sheet.

[0033] Working principle: In the winding assembly 21, the side plate 211 is fixedly installed on the left section of the device body 1 to provide stable support for the assembly; the drive motor 212 is installed on the back of the side plate 211, and the rotating shaft 213 at its output end drives the rotating roller 214 to rotate, and the silicon steel sheet coil 215 is wound around the outer wall of the rotating roller 214; the upper pressure roller 216 and the middle pressure roller 217 are respectively rotatably connected to the upper and middle inner walls of the side plate 211, and they apply appropriate pressure to the silicon steel sheet coil 215 to ensure that the silicon steel sheet remains flat and stable during the unwinding process, and avoid wrinkles or deviations, laying the foundation for subsequent transmission and slitting processes;

[0034] The transmission assembly 22 plays a role in transmitting and pre-processing silicon steel sheets throughout the slitting process; the feed roller 221 is rotatably connected to the inner side of the device body 1, and its outer wall receives the upper section of the silicon steel sheet roll 215 transmitted from the winding assembly 21, cooperating with the feed roller 222 to control the transmission speed and tension of the silicon steel sheets; the feed roller 222 is rotatably connected to the inner wall of the upper section of the device body 1, and the handle 223 at one end of its back can manually adjust the speed of the feed roller 222, thereby flexibly controlling the feed amount of silicon steel sheets; the inner side of the middle section of the device body 1 The cleaning roller 224 can effectively remove the debris adhering to the outer wall of the silicon steel sheet roll 215, ensuring the cleanliness of the silicon steel sheet surface. The semi-cylinder 226 at the bottom of the mounting frame 225 covers the upper outer wall of the cleaning roller 224, which can prevent debris from splashing during the cleaning process. The cylinder 228 installed on the fixed frame 227 on the top right side of the device body 1 has a traction bearing frame 229 at its bottom output end that drives the second material transfer roller 2210 to move up and down. Together with the first material transfer roller 221 and the feed roller 222, it can achieve precise adjustment of the silicon steel sheet transmission path and pressure.

[0035] The slitting assembly 23 is responsible for slitting the silicon steel sheets. It is fixedly connected to the pneumatic slide bar 231 on the top right side of the device body 1. The pneumatic slider 232 can slide along its outer wall, driving the traction slide plate 233 to move, thereby enabling the clamp 234 and its right-side stop block 235 to clamp the silicon steel sheets, ensuring the silicon steel sheets are fixed in position during slitting. The feed roller 236 on the inner right side of the device body 1 is connected to the transmission roller 237 for further transmission of the silicon steel sheets. The slitting blade 238 moves up and down on the inner wall of the device body 1 via pneumatic transmission to slit the silicon steel sheets. The receiving plate 239 on the inner right side of the device body 1 is used to receive the slitted silicon steel sheets, preventing them from falling and being damaged. Throughout the slitting process, the winding assembly 21 continuously unwinds, the transmission assembly 22 stably transmits and cleans the silicon steel sheets, and the slitting assembly 23 precisely slits. All components work closely together to efficiently and accurately complete the slitting task of the silicon steel sheets.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A silicon steel sheet slitting machine, comprising a device body (1), characterized in that: The device body (1) is provided with a connecting mechanism (2), the connecting mechanism (2) includes a winding assembly (21) provided on the left section of the device body (1), a transmission assembly (22) provided on the middle section of the device body (1), and a slitting assembly (23) provided on the right section of the device body (1). The transmission assembly (22) includes a material transfer roller (221) rotatably connected to the inner side of the device body (1), a feed roller (222) rotatably connected to the upper inner wall of the device body (1), a handle (223) fixedly connected to one end of the back of the feed roller (222), a cleaning roller (224) rotatably connected to the inner side of the middle section of the device body (1), a mounting frame (225) fixedly installed on the top of the inner wall of the device body (1), a semi-cylinder (226) fixedly installed at the bottom of the mounting frame (225), a fixing frame (227) fixedly installed on the top right side of the device body (1), a cylinder (228) fixedly installed on the top of the fixing frame (227), a traction bearing frame (229) fixedly connected to the bottom output end of the cylinder (228), and a material transfer roller (2210) rotatably connected to the inner wall of the traction bearing frame (229).

2. The silicon steel sheet slitting machine according to claim 1, characterized in that: The winding assembly (21) includes a side plate (211) fixedly connected to the left section of the device body (1). A drive motor (212) is fixedly installed at one end of the back of the side plate (211). A rotating shaft (213) is fixedly connected to the output end of the drive motor (212). A rotating roller (214) is fixedly connected to the outer wall of the rotating shaft (213). Silicon steel sheet coil (215) is wound on the outer wall of the rotating roller (214). An upper pressure roller (216) is rotatably connected to the inner wall of the upper section of the side plate (211). A middle pressure roller (217) is rotatably connected to the inner wall of the middle section of the side plate (211).

3. The silicon steel sheet slitting machine according to claim 1, characterized in that: The slitting assembly (23) includes a pneumatic slide rod (231) fixedly connected to the top right side of the device body (1). A pneumatic slider (232) is slidably connected to the outer wall of the pneumatic slide rod (231). A traction slide plate (233) is fixedly connected to the outer wall of the pneumatic slider (232). A clamp (234) is fixedly installed on the top of the traction slide plate (233). A stop block (235) is fixedly connected to the right section of the clamp (234). A feed roller (236) is drivenly connected to the inner right side of the device body (1). A transmission roller (237) is slidably connected to the outer wall of the feed roller (236). A sliding blade (238) is slidably connected to the inner right side of the device body (1). A receiving plate (239) is fixedly installed on the inner right section of the device body (1).

4. A silicon steel sheet slitting machine according to claim 1, characterized in that: The outer wall of the feed roller (221) receives the silicon steel sheet roll (215) on the upper outer wall, and the outer wall of the feed roller (222) abuts against the silicon steel sheet roll (215) on the lower outer wall.

5. A silicon steel sheet slitting machine according to claim 2, characterized in that: The silicon steel sheet roll (215) is driven to the lower outer wall of the intermediate pressure roller (217), and the silicon steel sheet roll (215) is driven to the upper outer wall of the upper pressure roller (216).

6. A silicon steel sheet slitting machine according to claim 3, characterized in that: The slitting blade (238) is pneumatically driven on the inner wall of the device body (1), and the receiving plate (239) receives the silicon steel sheet coil (215) for material transfer.

7. A silicon steel sheet slitting machine according to claim 1, characterized in that: The cleaning roller (224) is used to clean the debris attached to the outer wall of the silicon steel sheet roll (215), and the mounting frame (225) is covered on the upper section of the outer wall of the cleaning roller (224).

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