Efficient automatic stirring device

Abstract

The utility model relates to an efficient automatic stirring device which comprises a rotating plate, a stirring working group, a horizontal rotating mechanism, a vertical moving mechanism and a control mechanism, and the horizontal rotating mechanism is in transmission connection with the rotating plate and can drive the rotating plate to rotate around a vertical rotating axis; the vertical moving mechanism is in transmission connection with the rotating plate and can drive the rotating plate to vertically and linearly move; the stirring working group comprises a cleaning device and two stirring mechanisms which are arranged in pairs and mounted on the rotating plate, the two stirring mechanisms are symmetrically arranged about the vertical rotating axis of the rotating plate, and the stirring mechanisms are used for entering the open container for stirring; the rotating plate can rotate to a working position, when the rotating plate is located at the working position, one stirring mechanism in the stirring working group is located above the cleaning device, and when the rotating plate descends at the working position, the stirring mechanism can enter the cleaning device; the control mechanism is in control connection with the horizontal rotating mechanism and the vertical moving mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage production equipment, and particularly relates to an efficient automatic stirring device. Background Art

[0002] In the modern beverage production industry, especially in the preparation of diversified beverages such as milk tea, fruit juice, and milkshake, stirring is a key step to ensure uniform mixing of raw materials and delicate taste. Its efficiency and hygiene directly affect the quality and production efficiency of products. However, the stirring methods widely used in the current market mostly rely on traditional manual stirring or hand-held electric stirrers. Although these methods can meet the basic stirring requirements to a certain extent, they have the following limitations and deficiencies: 1. The manual labor intensity is high. Manual stirring is not only time-consuming and laborious, but also difficult to ensure the uniformity and consistency of stirring. Especially in large-scale production scenarios, the efficiency of manual stirring is low and it is difficult to meet the demand for quick meal delivery; 2. Although the hand-held electric stirrer reduces the manual burden to a certain extent, its operation still requires continuous hand-holding by personnel. Prolonged use is likely to cause fatigue, and it is difficult to handle multiple stirring tasks simultaneously, restricting the degree of automation of the production line; 3. During the beverage production process, the frequent replacement of different flavors and raw materials requires the stirrer to have the ability to be quickly and thoroughly cleaned to avoid cross-contamination and flavor mixing. Traditional stirring methods often take a long time to clean and are not easy to clean thoroughly, increasing food safety hazards and operating costs; 4. Due to the large amount of human intervention in the stirring process, it not only affects the standardization and accuracy of stirring, but also restricts the overall efficiency of the production line. Especially during peak periods, manual stirring may become a bottleneck restricting production capacity improvement. Content of the Utility Model

[0003] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the utility model is to provide an efficient automatic stirring device, which can automatically stir beverages, reduce manual operation, save cleaning waiting time, and improve the stirring work efficiency.

[0004] To achieve the above object, the present utility model provides an efficient automatic stirring device, which includes a rotating plate, a stirring working group, a horizontal rotation mechanism, a vertical movement mechanism and a control mechanism. The horizontal rotation mechanism is in transmission connection with the rotating plate and can drive the rotating plate to rotate around a vertical rotation axis. The vertical movement mechanism is in transmission connection with the rotating plate and can drive the rotating plate to move vertically in a straight line. The stirring working group includes a washer and two stirring mechanisms arranged in pairs and installed on the rotating plate, and the two stirring mechanisms are symmetrically arranged about the vertical rotation axis of the rotating plate. The stirring mechanism is used to enter an open container for stirring. The rotating plate can rotate to a working position. When the rotating plate is in the working position, one of the stirring mechanisms in the stirring working group is located above the washer, and when the rotating plate descends in the working position, the stirring mechanism can enter the washer. The control mechanism is respectively in control connection with the horizontal rotation mechanism and the vertical movement mechanism.

[0005] Further, the stirring mechanism includes a stirring frame for extending into an open container for stirring and a stirring drive assembly for driving the stirring frame to rotate.

[0006] Further, the stirring frame includes a connecting rod and a stirring paddle. The upper end of the connecting rod is connected to the rotating plate, and the stirring paddle is installed on the connecting rod.

[0007] Further, the stirring mechanism further includes a cover that can move up and down. When the stirring mechanism extends into an open container, the cover can cover the upper opening of the open container.

[0008] Further, the stirring mechanism further includes an elastic structure arranged between the upper side of the cover and the rotating plate. The elastic structure can apply a downward elastic force to the cover.

[0009] Further, the rotating plate is installed on the horizontal rotation mechanism, the horizontal rotation mechanism is installed on the vertical movement mechanism, and the vertical movement mechanism drives the horizontal rotation mechanism and the rotating plate to move vertically in a straight line together; or, the rotating plate is installed on the vertical movement mechanism, the vertical movement mechanism is installed on the horizontal rotation mechanism, and the horizontal rotation mechanism drives the vertical movement mechanism and the rotating plate to rotate around the vertical rotation axis together.

[0010] Further, the horizontal rotation mechanism includes a rotation motor and a rotation transmission seat connecting the rotation motor and the rotating plate. The output shaft of the rotation motor drives the rotating plate to rotate through the rotation transmission seat.

[0011] Further, the vertical movement mechanism includes a vertical beam, a vertical movement seat and a vertical drive assembly. The vertical movement seat is installed on the vertical beam, and the vertical drive assembly is connected to the vertical movement seat and drives the vertical movement seat to move vertically in a straight line.

[0012] Further, a positioning and detecting mechanism is further included. The positioning and detecting mechanism is in signal connection with the control mechanism, and signals are sent out when the rotating plate rotates to the working position.

[0013] Further, a lower dead point detecting mechanism is further included. The lower dead point detecting mechanism is in signal connection with the control mechanism, and signals are sent out when the rotating plate moves downward from the working position until the stirring mechanism enters the open container and is located at the specified height position.

[0014] As described above, the high-efficiency automatic stirring device involved in the present invention has the following beneficial effects:

[0015] 1. Automatic stirring can be achieved. While one stirring mechanism in the stirring working group is performing the stirring work, the other stirring mechanism is cleaned. The two stirring mechanisms alternate between stirring and cleaning, which can ensure that there is always a clean stirring mechanism working, reduce the waiting time for cleaning, the whole work can be automatically completed, reduce manual operation, and improve the stirring work efficiency.

[0016] 2. The horizontal rotation mechanism and the vertical movement mechanism can drive the rotating plate to work stably, and precise positioning is achieved through the positioning and detecting mechanism and the lower dead point detecting mechanism, ensuring the automation and accuracy of the whole work. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the high-efficiency automatic stirring device in the present invention.

[0018] Figure 2 It is a side view of the high-efficiency automatic stirring device in the present invention.

[0019] Figure 3 is Figure 1 the enlarged view of the A circle in

[0020] Figure 4 It is a schematic structural diagram of the stirring mechanism in the present invention.

[0021] Explanation of the Reference Numerals in the Drawings

[0022] 1 Open container

[0023] 2 Rotating plate

[0024] 3 Stirring mechanism

[0025] 31 Stirring frame

[0026] 311 Connecting rod

[0027] 312 Stirring paddle

[0028] 32 Stirring motor

[0029] 33 Retaining Cover

[0030] 34 Spring

[0031] 4 Washer

[0032] 5 Horizontal Rotating Mechanism

[0033] 51 Rotating Motor

[0034] 52 Rotating Drive Seat

[0035] 6 Vertical Moving Mechanism

[0036] 61 Vertical Beam

[0037] 62 Vertical Moving Seat

[0038] 63 Vertical Driving Motor

[0039] 7 Position Detection Mechanism

[0040] 71 Position Switch

[0041] 72 Trigger Block Detailed Implementation Manner

[0042] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0043] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0044] See Figures 1 to 4, the present utility model provides an efficient automatic stirring device, which includes a rotating plate 2, a stirring working group, a horizontal rotation mechanism 5, a vertical movement mechanism 6 and a control mechanism. The horizontal rotation mechanism 5 is in transmission connection with the rotating plate 2 and can drive the rotating plate 2 to rotate around the vertical rotation axis; the vertical movement mechanism 6 is in transmission connection with the rotating plate 2 and can drive the rotating plate 2 to move vertically in a straight line; the stirring working group includes a washer 4 and two stirring mechanisms 3 arranged in pairs and mounted on the rotating plate 2, and the two stirring mechanisms 3 are symmetrically arranged about the vertical rotation axis of the rotating plate 2. The stirring mechanism 3 is used to enter the open container 1 for stirring; the rotating plate 2 can rotate to the working position. When the rotating plate 2 is in the working position, one of the stirring mechanisms 3 in the stirring working group is located above the washer 4, and when the rotating plate 2 descends in the working position, the stirring mechanism 3 can enter the washer 4; the control mechanism is respectively in control connection with the horizontal rotation mechanism 5 and the vertical movement mechanism 6.

[0045] The main working principle of the efficient automatic stirring device involved in the present utility model is as follows: The efficient automatic stirring device can be used to stir various liquids in a variety of open containers 1, especially to stir the tea soup in the teacups in a tea shop. The number N of the stirring working groups can also be one or more. Each stirring working group is used to stir one open container 1. Refer to Figure 1 and Figure 2 . Taking one stirring working group as an example, in use, place the open container 1 to be stirred. The open container 1 and the washer 4 are symmetrically arranged about the vertical rotation axis of the rotating plate 2. The horizontal distances from the open container 1 and the washer 4 to the vertical rotation axis of the rotating plate 2 are equal to the horizontal distance from the stirring mechanism 3 to the vertical rotation axis of the rotating plate 2, and the open container 1 and the washer 4 are kept at approximately the same height. When starting the stirring work, the horizontal rotation mechanism 5 drives the rotating plate 2 to rotate to the working position. At this time, the two stirring mechanisms 3 of the stirring working group are respectively located above the open container 1 and the washer 4. Then the vertical movement mechanism 6 drives the rotating plate 2 to move vertically downward, so that the two stirring mechanisms 3 of the stirring working group respectively enter the open container 1 and the washer 4. One stirring mechanism 3 stirs the inside of the open container 1, and at the same time the other stirring mechanism 3 is cleaned in the washer 4. After the stirring is completed, the rotating plate 2 is driven by the vertical movement mechanism 6 and the horizontal rotation mechanism 5, so that the two stirring mechanisms 3 leave the open container 1 and the washer 4. When performing the next stirring, the horizontal rotation mechanism 5 drives the rotating plate 2 to rotate 180 degrees to another working position. At this time, the two stirring mechanisms 3 of the stirring working group have completed the position swapping relative to the previous stirring. The stirring mechanism 3 that has been cleaned is located above the open container 1, and the stirring mechanism 3 stained with the liquid of the previous stirring is located above the washer 4. Then the rotating plate 2 descends, and at the same time, the stirring work and the work of cleaning the stirring mechanism 3 are carried out.

[0046] The high-efficiency automatic stirring device of the present utility model can achieve automatic stirring. While one stirring mechanism 3 in the stirring working group is performing stirring work, the other stirring mechanism 3 is cleaned thoroughly. The two stirring mechanisms 3 alternate between stirring and cleaning, which can ensure that there is always a clean stirring mechanism 3 working, reduce the waiting time for cleaning, and the whole work can be completed automatically, reducing manual operation and improving the stirring work efficiency and safety.

[0047] See Figures 1 to 4 , and the following further illustrates the present utility model with a specific embodiment:

[0048] In this embodiment, see Figure 1 , as a preferred design, the stirring mechanism 3 includes a stirring frame 31 for extending into the open container 1 for stirring and a stirring driving assembly for driving the rotation of the stirring frame 31. The stirring frame 31 includes a connecting rod 311 and stirring paddles 312. The upper end of the connecting rod 311 is rotatably connected to the rotating plate 2, and the stirring paddles 312 are installed on the connecting rod 311. The stirring driving assembly includes a stirring motor 32, and the stirring motor 32 is fixed on the rotating plate 2, and its output shaft is fixedly connected to the connecting rod 311. By controlling the control mechanism to start the stirring motor 32, the stirring frame 31 is driven to rotate, thereby performing stirring work. The stirring driving assembly can also adopt other driving methods. In other embodiments, the stirring frame 31 can also be in other forms, and the upper end can also be fixedly connected to the rotating plate 2, and the stirring frame 31 is driven to move up and down by the up and down movement of the rotating plate 2 for stirring.

[0049] In this embodiment, see Figure 1 , as a preferred design, the stirring mechanism 3 further includes a movable cover 33 that can move up and down. When the stirring mechanism 3 extends into the open container 1, the cover 33 can cover the upper opening of the open container 1. Specifically, a through hole for the connecting rod 311 of the stirring frame 31 to pass through is provided in the middle of the cover 33, and the cover 33 can slide up and down along the connecting rod 311. When the stirring frame 31 extends into the open container 1, the cover 33 can cover the upper opening of the open container 1, thereby preventing the liquid in the open container 1 from spilling out during the stirring process. Further preferably, the stirring mechanism 3 further includes an elastic structure disposed between the upper side of the cover 33 and the rotating plate 2. The elastic structure includes a plurality of springs 34, and the upper and lower ends of the springs 34 are respectively connected to the bottom of the rotating plate 2 and the upper side surface of the cover 33. When the rotating plate 2 descends to press the cover 33 on the upper opening of the open container 1, the springs 34 are compressed at this time, and their elastic force can make the cover 33 stably press on the open container 1 and will not damage the open container 1.

[0050] In this embodiment, see Figure 1, the washer 4 is a container filled with clean water or other cleaning solutions. The stirring frame 31 of the stirring mechanism 3 extends into the washer 4 and moves, thereby achieving cleaning. The washer 4 can also adopt other suitable structures, as long as it can clean the stirring frame 31 of the stirring mechanism 3 through flushing, wiping and other methods.

[0051] In this embodiment, refer to Figure 1 and Figure 2 , the number of the stirring working groups is one, which is used to stir an open container 1. In other embodiments, the number N of the stirring working groups can also be more than 2, and can stir N open containers 1 simultaneously, which can be specifically set according to needs.

[0052] In this embodiment, refer to Figure 1 and Figure 2 As a preferred design, the rotating plate 2 is installed on the horizontal rotating mechanism 5, the horizontal rotating mechanism 5 is installed on the vertical moving mechanism 6, and the vertical moving mechanism 6 drives the horizontal rotating mechanism 5 and the rotating plate 2 to move vertically in a straight line together. The vertical moving mechanism 6 includes a vertical beam 61, a vertical moving seat 62 and a vertical driving component. The vertical moving seat 62 is installed on the vertical beam 61. The vertical driving component is connected to the vertical moving seat 62 and drives the vertical moving seat 62 to move vertically in a straight line. The horizontal rotating mechanism 5 is fixedly installed on the vertical moving seat 62. The vertical driving component includes a vertical driving motor 63 and an intermediate transmission structure connecting the vertical driving motor 63 and the vertical moving seat 62. The vertical driving motor 63 and the intermediate transmission structure are both arranged on the vertical beam 61. The intermediate transmission structure can specifically adopt a lead screw transmission structure or other structures. The control mechanism controls the rotation of the vertical driving motor 63. When the vertical driving motor 63 rotates, it drives the vertical moving seat 62 to move up and down in a straight line through the intermediate transmission structure. The horizontal rotating mechanism 5 includes a rotating motor 51 and a rotating transmission seat 52. The rotating motor 51 and the rotating transmission seat 52 are both fixedly installed on the vertical moving seat 62. The control mechanism controls the rotation of the rotating motor 51. The output shaft of the rotating motor 51 is connected to the rotating plate 2 through the rotating transmission seat 52 and drives the rotating plate 2 to rotate in the horizontal direction. The specific structures of the vertical moving mechanism 6 and the horizontal rotating mechanism 5 can also adopt other suitable designs. In addition, in other embodiments, it can also be that the rotating plate 2 is installed on the vertical moving mechanism 6, the vertical moving mechanism 6 is installed on the horizontal rotating mechanism 5, and the horizontal rotating mechanism 5 drives the vertical moving mechanism 6 and the rotating plate 2 to rotate together around the vertical rotation axis.

[0053] In this embodiment, refer to Figure 1 and Figure 3, as a preferred design, it further includes a positioning and detecting mechanism 7. The positioning and detecting mechanism 7 is connected to the control mechanism by signal. When the rotating plate 2 rotates to the working position, the positioning and detecting mechanism 7 emits a signal. Specifically, the positioning and detecting mechanism 7 includes a position switch 71 and a trigger block 72. The position switch 71 can be an optoelectronic position switch or a contact position switch. The position switch 71 is fixedly arranged on the rotating motor 51, and the trigger block 72 is fixedly arranged on the rotating plate 2. The positions of the position switch 71 and the trigger block 72 can also be swapped. When the rotating plate 2 rotates to the working position, the trigger block 72 moves to the position of the position switch 71 and triggers the position switch 71 to emit a signal. The control mechanism controls the horizontal rotating mechanism 5 to stop in time according to this signal, so that the rotating plate 2 accurately stops at the working position. The positioning and detecting mechanism 7 can also adopt other existing suitable structures.

[0054] In this embodiment, as a preferred design, a lower limit detecting mechanism (not shown in the drawings) is also provided. The lower limit detecting mechanism is connected to the control mechanism by signal. The lower limit detecting mechanism is used to control the lowest position where the stirring mechanism 3 stops when performing the stirring work. When the rotating plate 2 moves downward at the working position until the stirring mechanism 3 enters the open container 1 and is located at a specified height position (this position can be set according to the situation), the lower limit detecting mechanism emits a signal. The control mechanism controls the vertical moving mechanism 6 to stop in time according to this signal, so that the rotating plate 2 accurately stops at the lower stop position, preventing the stirring mechanism 3 from extending excessively. The lower limit detecting mechanism can also specifically adopt the position switch 71 and the trigger block 72, and its principle is similar to that of the positioning and detecting mechanism 7. Similarly, an upper limit detecting mechanism can also be provided, which is used to control the uppermost position where the rotating plate 2 drives the stirring mechanism 3 to move upward away from the open container 1 and the washer 4. When the rotating plate 2 reaches the uppermost position, the upper limit detecting mechanism emits a signal. The control mechanism controls the vertical moving mechanism 6 to stop in time according to this signal, so that the rotating plate 2 accurately stops at the upper stop position in time.

[0055] In the present utility model, the control mechanism can adopt an existing structure. Specifically, a PLC controller can be adopted and configured with corresponding electrical components. The control mechanism has functions such as data storage, calculation and analysis, and instruction sending, and can control the automatic movement of each moving part of the device to achieve the stirring work.

[0056] As can be seen from the above, the high-efficiency automatic stirring device of the present utility model has the following beneficial effects:

[0057] 1. It can achieve automatic stirring, and while one stirring mechanism 3 in the stirring work group is performing the stirring work, the other stirring mechanism 3 is cleaned. The two stirring mechanisms 3 alternate between stirring and cleaning, which can ensure that there is always a clean stirring mechanism 3 working, reduce the waiting time for cleaning, the whole work can be completed automatically, reduce manual operation, and improve the stirring work efficiency.

[0058] 2. The horizontal rotation mechanism 5 and the vertical movement mechanism 6 can drive the rotating plate 2 to work stably, and achieve precise positioning through the positioning detection mechanism 7 and the upper and lower stop detection mechanism, ensuring the automation and accuracy of the entire work.

[0059] In summary, the utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0060] The above embodiments are only illustrative of the principles and effects of the utility model, and are not intended to limit the utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A high-efficiency automatic stirring device, characterized in that: The invention comprises a rotating plate (2), a stirring working group, a horizontal rotating mechanism (5), a vertical moving mechanism (6) and a control mechanism, wherein the horizontal rotating mechanism (5) is connected to the rotating plate (2) in a transmission manner and can drive the rotating plate (2) to rotate around a vertical rotating axis; the vertical moving mechanism (6) is connected to the rotating plate (2) in a transmission manner and can drive the rotating plate (2) to move vertically in a straight line; the stirring working group comprises a cleaning device (4) and two stirring mechanisms (3) arranged in pairs and mounted on the rotating plate (2), and the two stirring mechanisms (3) are symmetrically arranged about the vertical rotating axis of the rotating plate (2), and the stirring mechanisms (3) are used to enter into an open container (1) for stirring; the rotating plate (2) can be rotated to a working position, and when the rotating plate (2) is in the working position, one stirring mechanism (3) in the stirring working group is located above the cleaning device (4), and when the rotating plate (2) is lowered in the working position, the stirring mechanism (3) can enter into the cleaning device (4); the control mechanism is respectively connected to the horizontal rotating mechanism (5) and the vertical moving mechanism (6) in a control manner.

2. The high-efficiency automatic stirring device according to claim 1 is characterized in that: The stirring mechanism (3) comprises a stirring frame (31) for extending into the open container (1) for stirring, and a stirring drive component for driving the stirring frame (31) to rotate.

3. The high-efficiency automatic stirring device according to claim 2 is characterized in that: The stirring frame (31) comprises a connecting rod (311) and a stirring paddle (312); the upper end of the connecting rod (311) is connected to the rotating plate (2); and the stirring paddle (312) is mounted on the connecting rod (311).

4. The high-efficiency automatic stirring device according to claim 1 or 2, characterized in that: The stirring mechanism (3) further comprises a blocking cover (33) which can move up and down. When the stirring mechanism (3) is inserted into the open container (1), the blocking cover (33) can cover the upper opening of the open container (1).

5. The high-efficiency automatic stirring device according to claim 4 is characterized in that: The stirring mechanism (3) further comprises an elastic structure arranged between the upper side of the blocking cover (33) and the rotating plate (2), wherein the elastic structure is capable of applying a downward elastic force to the blocking cover (33).

6. The high-efficiency automatic stirring device according to claim 1 is characterized in that: The rotating plate (2) is mounted on a horizontal rotating mechanism (5), the horizontal rotating mechanism (5) is mounted on a vertical moving mechanism (6), and the vertical moving mechanism (6) drives the horizontal rotating mechanism (5) and the rotating plate (2) to move vertically linearly together; or, the rotating plate (2) is mounted on the vertical moving mechanism (6), the vertical moving mechanism (6) is mounted on the horizontal rotating mechanism (5), and the horizontal rotating mechanism (5) drives the vertical moving mechanism (6) and the rotating plate (2) to rotate together around a vertical rotating axis.

7. The high-efficiency automatic stirring device according to claim 1 or 6, characterized in that: The horizontal rotation mechanism (5) comprises a rotating motor (51) and a rotating transmission seat (52) connecting the output shaft of the rotating motor (51) and the rotating plate (2); the output shaft of the rotating motor (51) drives the rotating plate (2) to rotate via the rotating transmission seat (52).

8. The high-efficiency automatic stirring device according to claim 1 or 6, characterized in that: The vertical moving mechanism (6) comprises a vertical beam (61), a vertical moving seat (62) and a vertical driving assembly. The vertical moving seat (62) is installed on the vertical beam (61). The vertical driving assembly is connected to the vertical moving seat (62) and drives the vertical moving seat (62) to move vertically in a linear manner.

9. The high-efficiency automatic stirring device according to claim 1, characterized in that: It also comprises a positioning detection mechanism (7), which is connected to the control mechanism signal, and the positioning detection mechanism (7) sends a signal when the rotating plate (2) rotates to the working position.

10. The high-efficiency automatic stirring device according to claim 1, characterized in that: It also includes a lower stop position detection mechanism, which is connected to the control mechanism signal. When the rotating plate (2) moves down from the working position to the stirring mechanism (3) and enters the open container (1) and is located at a specified height position, the lower stop position detection mechanism sends a signal.

Images