WO2022047871A1

WO2022047871A1 - Plastic sheet equidistant cutting device for chemical industry

Info

Publication number: WO2022047871A1
Application number: PCT/CN2020/117956
Authority: WO
Inventors: 李素燕
Original assignee: 李素燕
Priority date: 2020-09-01
Filing date: 2020-09-26
Publication date: 2022-03-10
Also published as: CN112277037A

Abstract

A plastic sheet equidistant cutting device for the chemical industry, comprising a worktable (1). Four corners on a bottom end of the worktable (1) are fixedly connected to support legs (2). A conveyor belt (3) is fixedly arranged in the middle of the top end of the telescopic worktable (1). A lifting/lowering plate frame (4) is fixedly arranged on the top end of the worktable (1) located on the side of the conveyor belt (3). A sheet hopper (5) is fixedly arranged on the side of the worktable (1). The tail end of a rotating shaft of a transmission wheel on one end of the conveyor belt (3) is fixedly connected to a first stepper motor (7). A second stepper motor (8) is fixedly arranged in the middle of the top end of the lifting/lowering plate frame (4). A ball screw (9) is provided inside the lifting/lowering plate frame (4) along the central axis. The top end of the ball screw (9) penetrates through the top end of the lifting/lowering plate frame (4), and is fixedly connected to the tail end of a rotating shaft of the second stepper motor (8). An outer wall of the ball screw (9) is threadedly connected to a lifting/lowering table (10). A fixed shaft (12) is fixedly arranged in the middle of both ends of the lifting/lowering table (10). The tail end of the fixed shaft (12) is fixedly connected to a fixture base (13). The plastic sheet equidistant cutting device for the chemical industry is simple and reasonable in structure, has a novel design, and has high equidistant cutting efficiency in plastic sheet equidistant cutting.

Description

An isometric cutting device for chemical plastic plates

technical field

The invention relates to the technical field of chemical product production equipment, in particular to an isometric cutting device for chemical plastic plates.

Background technique

Plastic board: Plastic board is a board made of plastic. Plastic is a synthetic polymer compound that can freely change its shape. Plastic is a material obtained by synthesis or condensation reaction of monomer raw materials. It is composed of synthetic resin and additives such as fillers, plasticizers, stabilizers, lubricants, and pigments. Its main component is synthetic resin. The plastic we usually use is not a pure substance, it is formulated from many materials. Among them, high molecular polymers (or synthetic resins) are the main components of plastics. In addition, in order to improve the performance of plastics, various auxiliary materials, such as fillers, plasticizers, lubricants, stabilizers, etc., are added to the polymer. Colorants, etc., can become plastics with good performance.

Plastic sheets are sheets made of plastic as raw materials. They are widely used in construction and chemical industries. They are wear-resistant, vibration-resistant, corrosion-resistant, recyclable, strong, and resistant to chemical, environmental protection, and construction boards. Aging, waterproof, moisture-proof, not easy to deform, reuse and so on. Moreover, the replaced hard plastic pallets can also be recycled and processed, which greatly reduces the cost.

As a thermoplastic engineering plastic with excellent performance, UHMWPE was mainly used in textile, paper, food and other industrial sectors in the early stage of development. With the continuous advancement of technology, various products can be produced by different processing methods. , so the application field continues to expand. The current plastic sheet industry should speed up the adjustment of industrial structure and the construction of modern enterprise system; pay more attention to the development of human resources and improve the overall quality of the whole industry; rely on scientific and technological progress to accelerate industrial upgrading and technological innovation; it is necessary to continuously adjust product structure and improve equipment technology We must vigorously strive to create brand-name products and earnestly implement sustainable development strategies; we must work with one heart and one mind, keep pace with the times, and achieve sustained, rapid, stable and healthy development in the fierce domestic and foreign market competition.

The existing plastic sheet machine is prone to shaking during cutting, resulting in cutting deviation. The plastic sheet with deviation can only be destroyed as waste, wasting resources, and when the traditional plastic sheet cutting machine is cutting, the cutting length of the plastic sheet needs to be manually adjusted. Measuring with a ruler is prone to deviation, time-consuming and laborious, and it is not easy to cut out equidistant plastic plates. Therefore, we have improved this and proposed an isometric cutting device for chemical plastic plates.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:

The invention is an isometric cutting device for chemical plastic plates, which includes a workbench, the bottom end of the workbench is fixed with connecting legs at the four corners, the top middle of the telescopic workbench is fixedly provided with a conveyor belt, and the top of the workbench is fixed with a conveyor belt. A lifting plate frame is fixed on one side of the conveyor belt, a plate material hopper is fixed on one side of the worktable, a discharge hopper is fixed on the other side of the worktable, and the end of the rotating shaft of the transmission wheel at one end of the conveyor belt is fixed A first stepper motor is fixedly connected, a second stepper motor is fixed in the middle of the top of the lift plate frame, a ball screw is arranged inside the lift plate frame along the central axis, and the top of the ball screw runs through the lift. The top of the plate frame is fixedly connected to the end of the rotating shaft of the second stepping motor, the outer wall of the ball screw is threadedly connected to the lifting table, the top of the lifting table is fixed with a cutting knife seat, and the middle of both ends of the lifting table is fixed There is a fixed shaft, the end of the fixed shaft is fixedly connected to the clamp seat, the end of the two clamp seats is fixed with a clamp plate at the end of the side closest to each other, and the side of the lifting plate frame close to the cutting knife seat is fixed with a clamp plate. guide.

As a preferred technical solution of the present invention, a feeding chute is fixed in the middle of the board material hopper, the bottom end of the feeding chute is fixed with a connection slot, and the bottom of the board material hopper is fixed on the side close to the conveyor belt There is a hopper outlet, the bottom end of the hopper outlet and the top plane of the conveyor belt are located on the same plane, and a push plate is fixed at the intersection between the inner side of the hopper outlet and the bottom end of the feeding chute, and the push plate is far away from the hopper outlet. One side is fixedly connected to the top of the telescopic cylinder, the bottom end of the telescopic cylinder is fixedly connected to the bottom of the inner wall of the plate material bucket, the middle of the bottom end of the worktable is fixedly provided with an air pressure pump, and the telescopic cylinder is fixedly connected to the air pressure pump.

As a preferred technical solution of the present invention, two sides of the lifting plate frame are provided with card slots, one side of the lifting platform is slidably arranged inside the card slots, and a chute is provided at the position of the lifting platform close to the guide rails. The lift table is slidably connected to the guide rail.

As a preferred technical solution of the present invention, the clamp base and the splint are fixedly connected through a cylinder, one end of the cylinder is fixedly connected to the clamp base, the other end of the cylinder is fixedly connected to the splint, and the cylinder is fixedly connected through a trachea Air pressure pump, the surface of the splint is fixed with a rubber pad, the bottom end of the splint is fixedly connected with a support metal plate, and the support metal plate on one side is fixedly arranged on the side of the bottom end of the splint away from the cutting knife seat, The width of the supporting metal plate is slightly larger than the width of the splint, a side baffle is fixed on the side of the splint away from the cutting blade seat, and a plurality of knife grooves are fixed in the middle of the side baffle.

As a preferred technical solution of the present invention, the end of the cutting knife holder is detachably connected with a combined knife, the combined knife is composed of several cutting knives of the same specification arranged at equal intervals, and the middle of the cutting knives is fixed Set on the same shaft, a telescopic hydraulic cylinder is fixed at the position where the cutting tool holder and the combined cutter are connected, the top end of the telescopic hydraulic cylinder is fixed with a combined cutter connection, and the bottom end of the telescopic hydraulic cylinder is fixedly connected On the surface of the cutting tool holder, a hydraulic oil tank and a hydraulic pump are fixedly arranged at the bottom end of the worktable, and the telescopic hydraulic cylinder is fixedly connected to the hydraulic pump through a hydraulic pipe.

As a preferred technical solution of the present invention, a console is fixed on the side of the worktable away from the lifting plate frame and close to the unloading hopper, and a control panel and a shortcut operation button are fixed on the top of the console. The console is electrically connected with the first stepper motor, the second stepper motor, the telescopic cylinder, the telescopic hydraulic cylinder, the cylinder, the hydraulic pump and the air pressure pump.

As a preferred technical solution of the present invention, baffle plates are fixed on both sides of the bottom end of the unloading hopper, and the bottom of the unloading hopper is fixedly connected with an inclination angle smaller than the buffer zone of the bottom plate in the middle of the unloading hopper.

As a preferred technical solution of the present invention, optical sensors are fixed on both sides of the conveyor belt in the conveying direction, the optical sensors and the cutting knife seat are arranged on the same central axis, and the optical sensors are arranged in series with the first step motor, The model of the optical sensor is Si1153.

The beneficial effects of the present invention are: through the pushing action of the plate material bucket, the plastic plates to be processed are pushed to the conveyor belt in turn, so that the feeding of the plastic plates is mechanized, and the pushing time of the plastic plates is also the same, which reduces the cutting of the device. Error; the supporting metal plate on the edge of the fixture can reduce the shaking of the tool when cutting, reduce the cutting deviation, and thus reduce the waste of resources; the equidistantly set combined cutter can cut equidistant plastic plates at the same time, increasing the cutting device By setting the console, the control of the device is integrated, making the operation of the staff more convenient, which is beneficial to increase the production efficiency; by setting the lifting plate frame, the clamped plastic plates can be suspended in the air, reducing the need for cutting The shaking of the device reduces the cutting error; by setting the detachable combined tool, the combined tool can be adjusted according to the required cutting distance, which makes the production of plastic sheets more convenient.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the overall structure schematic diagram of a chemical plastic plate isometric cutting device of the present invention;

2 is a schematic structural diagram of a part of a lift plate frame of a chemical plastic plate isometric cutting device of the present invention;

3 is a schematic diagram of the structure of a plate material bucket of a chemical plastic plate isometric cutting device of the present invention;

FIG. 4 is an enlarged view of the structure of a part of the cutting blade seat of an isometric cutting device for chemical plastic plates according to the present invention.

In the figure: 1. Workbench; 2. Outriggers; 3. Conveyor belt; 4. Lifting plate frame; 5. Plate material hopper; 6. Unloading hopper; 7. First step motor; 9. Ball screw; 10. Lifting table; 11. Cutting knife seat; 12. Fixed shaft; 13. Fixture seat; 14. Plywood; 15. Guide rail; ; 19, push plate; 20, telescopic cylinder; 21, console.

detailed description

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

As shown in Figures 1-4, an isometric cutting device for chemical plastic plates of the present invention includes a workbench 1, the four corners of the bottom end of the workbench 1 are fixedly connected with legs 2, and the top middle of the telescopic workbench 1 is fixed A conveyor belt 3 is provided, the top of the worktable 1 is located on one side of the conveyor belt 3, and a lifting plate frame 4 is fixed, one side of the worktable 1 is fixedly provided with a plate material hopper 5, and the other side of the worktable 1 is fixedly provided with a discharge hopper 6. The end of the rotating shaft of the transmission wheel at one end of the conveyor belt 3 is fixedly connected to the first stepping motor 7, the top middle of the lifting plate frame 4 is fixedly provided with a second stepping motor 8, and the inner part of the lifting plate frame 4 is provided with a ball wire along the central axis Rod 9, the top of the ball screw 9 penetrates the top of the lifting plate frame 4 and is fixedly connected to the end of the rotating shaft of the second stepping motor 8, the outer wall of the ball screw 9 is threadedly connected to the lifting table 10, and the top of the lifting table 10 is fixed with a cutting The tool holder 11 and the middle of the two ends of the lifting table 10 are fixedly provided with a fixed shaft 12, and the end of the fixed shaft 12 is fixedly connected to a clamp base 13, and a clamp plate 14 is fixed at the end of the two clamp bases 13 that are closest to each other. A guide rail 15 is fixed on the side of the frame 4 close to the cutting blade seat 11 .

Among them, a feeding chute 16 is fixed in the middle of the plate material hopper 5, a connecting slot 17 is fixed at the bottom end of the feeding chute 16, and a hopper outlet 18 is fixed on the side of the bottom of the plate material hopper 5 close to the conveyor belt 3, and the hopper outlet The bottom end of 18 and the top plane of conveyor belt 3 are located in the same plane, and the inner side of the hopper outlet 18 and the bottom end of the feeding chute 16 are fixedly provided with a push plate 19, and the side of the push plate 19 away from the hopper outlet 18 is fixedly connected to the telescopic cylinder. 20, the bottom end of the telescopic cylinder 20 is fixedly connected to the bottom of the inner wall of the plate material bucket 5, the middle of the bottom end of the worktable 1 is fixedly provided with an air pressure pump, and the telescopic cylinder 20 is fixedly connected to the air pressure pump, through the pushing action of the telescopic cylinder 20, The plate material hopper 5 has the function of automatic feeding, which increases the automation of the cutting device.

Among them, two sides of the lifting plate frame 4 are provided with card grooves, one side of the lifting table 10 is slidably arranged inside the card groove, and the lifting table 10 is provided with a chute at the position close to the guide rail 15, and the lifting table 10 is slidably connected to the guide rail 15. The lifting plate frame 4 can suspend the clamped plastic plate, reduce the shaking of the device during cutting, and reduce the cutting error.

The clamp base 13 and the splint 14 are fixedly connected by a cylinder, one end of the cylinder is fixedly connected to the clamp base 13, the other end of the cylinder is fixedly connected to the splint 14, the cylinder is fixedly connected to the air pressure pump through the trachea, and the surface of the splint 14 is fixedly provided with a rubber pad , the bottom end of the splint 14 is fixedly connected with a supporting metal plate, and the supporting metal plate on one side is fixedly arranged on the side of the bottom end of the splint 14 away from the cutting knife seat 11, and the width of the supporting metal plate is slightly larger than that of the splint 14. The width of the splint 14 A side baffle is fixed on the side away from the cutting blade base 11, and a plurality of knife grooves are fixed in the middle of the side baffle. The supporting metal plate around the splint 14 can make the device more difficult to be cut in the process of cutting the plastic sheet. The clamping of the plastic sheet is more stable and the cutting accuracy is increased.

Among them, the end of the cutting knife seat 11 is detachably connected with a combined knife, the combined knife is composed of several cutting knives of the same specification arranged at equal distances, the middle of the cutting knife is fixedly arranged on the same shaft, and the cutting knife block 11 and the combined knife The position where the cutter is connected is fixed with a telescopic hydraulic cylinder, the top of the telescopic hydraulic cylinder is fixed with a combined cutter connection, the bottom end of the telescopic hydraulic cylinder is fixedly connected to the surface of the cutting tool holder 11, and the bottom end of the worktable 1 is fixed with a hydraulic pressure The oil tank and hydraulic pump, and the telescopic hydraulic cylinder are fixedly connected to the hydraulic pump through the hydraulic pipe. By setting the detachable combined tool, the combined tool can be adjusted according to the required cutting distance, which makes the production of plastic sheets more convenient.

Among them, a console 21 is fixed on the side of the worktable 1 away from the lift plate frame 4 and close to the unloading hopper 6. The top of the console 21 is fixed with a control panel and a shortcut operation button. The console 21 is the same as the first step. The motor 7, the second stepping motor 8, the telescopic air cylinder 20, the telescopic hydraulic cylinder, the air cylinder, the hydraulic pump and the air pressure pump are electrically connected. By setting the console 21, the control of the device is integrated and the operation of the staff is more convenient , which is beneficial to increase production efficiency.

Among them, baffle plates are fixed on both sides of the bottom end of the unloading hopper 6, and the fixed connection angle of the bottom of the unloading hopper 6 is smaller than the buffer zone of the bottom plate in the middle of the unloading hopper 6. By setting the baffle plates, the cut plastic plates can be prevented Drop, the buffer at the bottom can reduce the falling speed of the plastic sheet and reduce the impact on the plastic sheet when unloading.

Among them, optical sensors are fixed on both sides of the conveying direction of the conveyor belt 3. The optical sensors are arranged on the same central axis as the cutting blade holder 11. The optical sensors are arranged in series with the first step motor 7. The model of the optical sensor is Si1153. The sensor can stop the operation of the plastic sheet on the conveyor belt 3 when it moves to the cutting knife base 11, and continue to operate after the plastic sheet is cut by the splint 14, so that the cutting production of the device is more automated.

When working, the device is turned on through the console 21, and the plastic sheets to be cut are placed in the feeding slot 16 from the slot 17 in an orderly manner. At this time, the telescopic cylinder 20 is extended, and the push plate 19 is pushed to the direction of the hopper outlet 18. , so that the plastic sheet at the bottom of the feeding chute 16 is pushed to the conveyor belt 3, and driven by the first step motor 7, the plastic sheet is driven by the conveyor belt 3 to move to just below the cutting knife seat 11, contacting the optical When the sensor is detected, the first stepping motor 7 stops running, the second stepping motor 8 rotates, the ball screw 9 rotates, the lifting table 10 is lowered, the cylinder is extended, and the clamping block 14 clamps the plastic sheet, and then the second The stepping motor 8 is reversed, the lifting table 10 is raised, the telescopic hydraulic cylinder is extended, the cutting blade of the combined cutter rotates, and the plastic sheet is cut. After the cutting is completed, the telescopic hydraulic cylinder contracts, and the second stepping motor 8 rotates. After the lift table 10 is lowered to the top horizontal position of the conveyor belt 3, the cylinder is retracted, the clamping plate 14 is retracted, the cut plastic sheet is put back on the surface of the conveyor belt 3, the second stepper motor 8 is reversed, and the lift table 10 is moved back to the original Standby position, at this time, the first step motor 7 continues to rotate, and the plastic sheet obtained after cutting is transported to the unloading hopper 6, and the cutting device is discharged along the unloading hopper 6 to complete the equidistant cutting operation on the plastic sheet, and then continue Carry out the same workflow and practice the continuous production process of automated cutting of plastic sheets.

Finally, it should be noted that: in the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the orientations shown in the accompanying drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the foregoing embodiments. The technical solutions described are modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

An isometric cutting device for chemical plastic plates, comprising a workbench (1), characterized in that the four corners of the bottom end of the workbench (1) are fixedly connected with legs (2), and the telescopic workbench (1) A conveyor belt (3) is fixed in the middle of the top of the workbench (1), a lifting plate frame (4) is fixed on one side of the conveyor belt (3) at the top of the workbench (1), and a lifting plate frame (4) is fixed on one side of the workbench (1). There is a plate material hopper (5), the other side of the worktable (1) is fixedly provided with a discharge hopper (6), and the end of the rotating shaft of the transmission wheel at one end of the conveyor belt (3) is fixedly connected to the first step motor (7). ), a second stepping motor (8) is fixed in the middle of the top of the lifting plate frame (4), and a ball screw (9) is arranged inside the lifting plate frame (4) along the central axis. The top end of the lead screw (9) penetrates through the top end of the lifting plate frame (4) and is fixedly connected to the end of the rotating shaft of the second stepping motor (8). The top of the lifting table (10) is fixedly provided with a cutting knife seat (11), the middle of both ends of the lifting table (10) is fixedly provided with a fixed shaft (12), and the end of the fixed shaft (12) is fixedly connected to a fixture The seat (13), the two clamp seats (13) are fixedly provided with a clamp plate (14) at the end of the side closest to each other, and the side of the lifting plate frame (4) close to the cutting knife seat (11) is fixedly installed. There are guide rails (15).
The isometric cutting device for chemical plastic plates according to claim 1, characterized in that a feeding chute (16) is fixed in the middle of the board material hopper (5), and the feeding chute (16) The bottom end of the plate material hopper (5) is fixedly connected with a notch (17), and a hopper outlet (18) is fixed on the side of the bottom of the plate material hopper (5) close to the conveyor belt (3), and the bottom end of the hopper outlet (18) is connected to the conveyor belt. (3) The top plane is arranged on the same plane, and a push plate (19) is fixed at the intersection between the inner side of the hopper outlet (18) and the bottom end of the feeding chute (16), and the push plate (19) is far away from the hopper outlet. One side of (18) is fixedly connected to the top end of the telescopic cylinder (20), the bottom end of the telescopic cylinder (20) is fixedly connected to the bottom of the inner wall of the plate material bucket (5), and the middle of the bottom end of the worktable (1) An air pressure pump is fixedly arranged, and the telescopic cylinder (20) is fixedly connected to the air pressure pump.
The isometric cutting device for chemical plastic plates according to claim 1, characterized in that, two sides of the lifting plate frame (4) are provided with clamping slots, and one side of the lifting platform (10) is slidably arranged Inside the card slot, a chute is provided at a position of the lift table (10) close to the guide rail (15), and the lift table (10) is slidably connected to the guide rail (15).
The isometric cutting device for chemical plastic plates according to claim 2, characterized in that the clamp seat (13) and the clamp plate (14) are fixedly connected by a cylinder, and one end of the cylinder is fixedly connected to the clamp base (13), the other end of the air cylinder is fixedly connected to the splint (14), the air cylinder is fixedly connected to the air pump through the air pipe, the surface of the splint (14) is fixedly provided with a rubber pad, and the bottom end of the splint (14) A supporting metal plate is fixedly connected, the supporting metal plate on one side is fixedly arranged on the side of the bottom end of the splint (14) away from the cutting blade seat (11), and the width of the supporting metal plate is slightly larger than the width of the splint (14). A side baffle is fixedly provided on the side of the splint (14) away from the cutting blade seat (11), and a plurality of knife grooves are fixedly arranged in the middle of the side baffle.
The equidistant cutting device for chemical plastic plates according to claim 1, characterized in that a combination cutter is detachably connected to the end of the cutter seat (11), and the combination cutter consists of a plurality of equidistant cutters. It consists of a set of cutting knives of the same specification, the middle part of the cutting knives is fixedly arranged on the same shaft, and a telescopic hydraulic cylinder is fixed at the position where the cutting knife seat (11) is connected with the combined knives, and the top end of the telescopic hydraulic cylinder is fixed A combined tool connection is fixedly arranged, the bottom end of the telescopic hydraulic cylinder is fixedly connected to the surface of the cutting tool seat (11), the bottom end of the worktable (1) is fixedly provided with a hydraulic oil tank and a hydraulic pump, the telescopic hydraulic cylinder The hydraulic cylinder is fixedly connected to the hydraulic pump through a hydraulic pipe.
The isometric cutting device for chemical plastic plates according to claim 1 or 5, characterized in that the side of the worktable (1) away from the lifting plate frame (4) is close to the side of the unloading hopper (6). A console (21) is fixedly provided, the top of the console (21) is fixedly provided with a control panel and a shortcut operation button, the console (21) is connected with the first stepper motor (7) and the second stepper motor (8), the telescopic air cylinder (20), the telescopic hydraulic cylinder, the air cylinder, the hydraulic pump and the air pressure pump are electrically connected.
The isometric cutting device for chemical plastic plates according to claim 1, characterized in that, baffle plates are fixed on both sides of the bottom end of the discharge hopper (6), and the bottom of the discharge hopper (6) is provided with baffle plates. The inclination angle of the fixed connection is smaller than the buffer zone of the middle bottom plate of the discharge hopper (6).
The equidistant cutting device for chemical plastic plates according to claim 1, characterized in that, optical sensors are fixed on both sides of the conveying belt (3) in the conveying direction, and the optical sensors are connected to the cutting knife seat (11) The optical sensor is arranged on the same central axis, the optical sensor is arranged in series with the first stepping motor (7), and the model of the optical sensor is Si1153.