A door structure and a door opening device

Abstract

The present application relates to a door structure and an opening machine, comprising a support frame forming a door hole, a roller shutter mechanism and an organ case, the roller shutter mechanism comprising a winding drum structure and a curtain cloth connected with the winding drum structure, the winding drum structure being installed on an upper frame of the support frame, the winding drum structure being capable of winding and unwinding the curtain cloth; the upper end of the organ case being fixed to the upper frame, the roller shutter mechanism and the organ case being arranged side by side in the thickness direction of the support frame, and the free end of the curtain cloth being connected with the lower end of the organ case. The present application sets the organ case, so that the organ case can be opened and closed along with the opening of the roller shutter mechanism, so that the pollutants will only adhere to the organ case, and then the pollutants will not basically adhere to the curtain cloth, so that the roller shutter mechanism basically does not need to be cleaned, the labor intensity of the staff is reduced, the working efficiency of the opening machine is improved, and the working life of the roller shutter mechanism is improved.

Description

Technical Field

[0001] This invention belongs to the field of anti-fouling technology, specifically relating to a door structure and a squaring machine. Background Technology

[0002] In existing machinery with roller shutter mechanisms, especially squaring machines, when cutting silicon rods, the roller shutter mechanism is closed, and contaminants such as silica sludge generated during cutting splash onto the back of the curtain. After cutting, the roller shutter mechanism needs to be opened, and most of the curtain is drawn into the roller structure, causing contaminants to accumulate inside. Over time, this can cause blockages in the roller structure, preventing the roller shutter mechanism from functioning properly. In this situation, workers are required to periodically disassemble the roller shutter mechanism and the roller structure to clean the contaminants, which greatly increases the workload of the workers. In addition, the squaring machine cannot work during the cleaning process, which slows down the cutting efficiency of silicon rods. Moreover, frequent disassembly of the roller shutter mechanism can also damage it and affect its service life.

[0003] To overcome the above problems, a cover is usually installed on the inside of the roller shutter mechanism to protect the curtain. However, when opening the door structure, the staff needs to manually lift the cover, which will soil the staff's clothes and make the squaring machine's workflow more cumbersome. Summary of the Invention

[0004] In view of this, the present invention provides a door structure and a squaring machine. By setting a bellows cover and connecting the lower end of the bellows cover to the free end of the curtain, the bellows cover can open and close with the opening and closing of the roller shutter mechanism. This ensures that pollutants only adhere to the bellows cover, and thus pollutants will not adhere to the curtain. Therefore, there is basically no need to clean the roller shutter mechanism, reducing the labor intensity of workers, improving the working efficiency of the squaring machine, extending the service life of the roller shutter mechanism, and without increasing the complexity of equipment use.

[0005] The technical solution adopted in this invention:

[0006] A door structure includes a support frame forming a door opening, a roller shutter mechanism, and a pleated hood;

[0007] The support frame includes a left frame, a top frame, and a right frame connected in sequence;

[0008] The roller blind mechanism includes a roller structure and a curtain connected to the roller structure. The roller structure is installed on the upper frame and can retract and extend the curtain, allowing the curtain to switch between a first state that completely covers the doorway and a second state that exposes at least part of the doorway.

[0009] The extension and retraction direction of the accordion cover is vertical. The accordion cover includes a first folding body, a second folding body, an upper connecting body, and a lower connecting body. In the thickness direction, the first folding body and the second folding body are arranged opposite to each other, and the upper end is connected through the upper connecting body, and the lower end is connected through the lower connecting body.

[0010] The accordion cover is fixed to the upper frame by the upper connector. The accordion cover has a third unfolded state and a fourth folded state. In the third state, the accordion cover covers the doorway. In the fourth state, the accordion cover exposes at least part of the doorway. In the thickness direction, the roller blind mechanism is arranged side by side with the accordion cover. The free end of the curtain is connected to the lower connector, so that when the curtain is in the first state, the accordion cover is in the third state, and when the curtain is in the second state, the accordion cover is in the fourth state.

[0011] Preferably, air holes are provided on the left connecting fold and the right connecting fold.

[0012] Preferably, the first folded body and the second folded body near the roll structure are provided with air holes.

[0013] Preferably, both the first folding body and the second folding body include a plurality of upper folding pieces and a plurality of lower folding pieces, which are staggered in the vertical direction. The upper folding pieces face downwards, and the lower folding pieces face upwards. The air holes are disposed on the upper folding pieces.

[0014] Preferably, a left gap is left between the left side of the accordion cover and the left frame, and a right gap is left between the right side of the accordion cover and the right frame;

[0015] It also includes a vertically arranged left baffle and a right baffle, the left baffle being installed on the left frame and the right baffle being installed on the right frame. The two baffles are located on the side of the accordion cover away from the roller blind mechanism, the left baffle covering the left gap and the right baffle covering the right gap.

[0016] Preferably, in the left-right direction, the baffle includes a mounting portion, an inclined portion, and an extension portion formed by bending in sequence. The mounting portion is connected to the support frame, and the inclined portion is inclined to the side away from the accordion cover, such that the extension portion is farther away from the accordion cover than the mounting portion.

[0017] Preferably, the left end of the bellows cover is provided with a left limiting groove, and the right end is provided with a right limiting groove;

[0018] It also includes a vertical left guide rail groove and a vertical right guide rail groove. The bottom of the left guide rail groove is connected to the left frame, and the bottom of the right guide rail groove is connected to the right frame. One side wall of the two guide rail grooves away from the roller blind mechanism cooperates with the corresponding limiting groove, and the other side wall of the guide rail groove cooperates with the side of the accordion cover facing the roller blind mechanism.

[0019] Preferably, the roller blind mechanism further includes a counterweight block connected to the free end of the curtain fabric.

[0020] Preferably, the counterweight is detachably connected to the lower end of the bellows cover.

[0021] Preferably, a gap is left between the lower side of the counterweight and the free end of the curtain;

[0022] The roller blind mechanism also includes an outer cover plate, which is connected to the counterweight and located on the side away from the bellows cover. The lower side of the counterweight is flush with the free end of the curtain. In the left-right direction, the size of the outer cover plate is smaller than the size of the door opening, such that there is a first distance between the left side of the outer cover plate and the left frame of the support frame, and a second distance between the right side of the outer cover plate and the right frame of the support frame.

[0023] Preferably, the left frame of the support frame is provided with a left sliding groove, the right frame of the support frame is provided with a right sliding groove, the left ends of the curtain and the counterweight are engaged with the left sliding groove, and the right ends of the curtain and the counterweight are engaged with the right sliding groove.

[0024] The present invention also relates to a square-opening machine, including the aforementioned door structure, wherein the accordion cover is located inside the roller shutter mechanism.

[0025] The beneficial effects of this invention are:

[0026] The roller structure can raise and lower the curtain, allowing it to open or close. The upper end of the accordion cover is fixed, while the lower end is connected to the free end of the curtain. This allows the rising and falling curtain to drive the accordion cover to rise and fall as well. When the curtain is closed, the accordion cover also closes, sealing the doorway. Consequently, when contaminants splash from one side of the accordion cover, they only splash onto the accordion cover, preventing the curtain from becoming contaminated. Therefore, when the curtain is opened, the reduced amount of contaminants on the curtain lowers the risk of the roller structure becoming clogged. Thus, the roller shutter mechanism in the door structure of this invention does not require regular cleaning, reducing the workload of workers. When applied to a squaring machine, it improves the cutting efficiency of silicon rods and extends the service life of the roller shutter mechanism. The accordion cover passively opens and closes with the curtain, and there is no other structure to store it. Therefore, contaminants on the accordion cover will not contaminate other structures. When cleaning the accordion cover, there is no need to disassemble it. You can simply wash it with a water gun, which is convenient and efficient. Moreover, the accordion cover rises and falls with the curtain, eliminating the need for staff to manually adjust it, thus avoiding contamination of staff clothing and not increasing the workload of staff.

[0027] The accordion cover of this invention adopts a double-folded structure, which can enhance the overall strength of the accordion cover and extend its service life. Moreover, the double-folded structure ensures that the accordion cover will not bend when it is extended or retracted without the aid of other limiting structures, so that the accordion cover can be extended or retracted in the vertical direction. When the curtain moves, the part of the door opening exposed by the accordion cover completely overlaps with the part of the door opening exposed by the curtain, so that the door opening can be opened or closed to the maximum extent. When applied to a squaring machine, it is convenient to insert or remove silicon rods. Attached Figure Description

[0028] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0029] Figure 1 This is a structural diagram of a door in its open state;

[0030] Figure 2 This is a cross-sectional view of the door structure in the closed state;

[0031] Figure 3 This is a structural diagram of a bellows cover;

[0032] Figure 4 yes Figure 3 An exploded view of the pleated thorax cover;

[0033] Figure 5 This is a structural diagram of a door in its closed state;

[0034] Figure 6 This is a structural diagram of the door structure in its closed state from another perspective;

[0035] Figure 7 This is a schematic diagram of the baffle structure;

[0036] Figure 8 This is a schematic diagram of the roller shutter mechanism;

[0037] Figure 9 This is a schematic diagram of the square rooting machine.

[0038] In the diagram: 1. Support frame; 2. Roller blind mechanism; 3. Accordion cover;

[0039] 11. Left frame; 12. Right frame; 13. Top frame;

[0040] 21. Curtain fabric; 22. Roller structure; 23. Counterweight; 24. Outer cover;

[0041] 31. First folding body; 32. Second folding body; 33. Upper connecting body; 34. Lower connecting body; 35. Left connecting folding body; 36. Right connecting folding body; 37. Left limiting groove; 38. Upper folding piece; 39. Lower folding piece;

[0042] 41. Left baffle; 42. Mounting part; 43. Inclined part; 44. Extension part;

[0043] 51. First guide rail structure; 52. Left slide groove. Detailed Implementation

[0044] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail, but well-known methods, processes, procedures, and elements are not described in detail in order to avoid obscuring the essence of the present invention.

[0045] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0046] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0047] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] See Figure 1 In this invention, for ease of understanding, the door structure is described in its normal use state. When the worker faces the door structure from the outside, the upper side of the worker is "up", the lower side is "down", the left side is "left", and the right side is "right". When the door structure is applied to the squaring machine, the side closer to the worker is "outer", and the side closer to the inside of the squaring machine is "inner". The inner and outer directions are also the thickness directions of the support frame described below.

[0049] See Figures 1-8 The present invention provides a door structure for use in work scenarios where contaminant splashing occurs, such as in a squaring machine. The door structure includes a support frame 1 forming a door opening, a roller shutter mechanism 2, and a bellows cover 3. The support frame includes a left frame 11, an upper frame 13, and a right frame 12 connected in sequence.

[0050] The extension and retraction direction of the accordion cover 3 is vertical. The accordion cover 3 includes a first folding body 31, a second folding body 32, an upper connecting body 33, and a lower connecting body 34. In the thickness direction, the first folding body 31 and the second folding body 32 are arranged opposite to each other. Their upper ends are connected by the upper connecting body 33, and their lower ends are connected by the lower connecting body 34.

[0051] The roller blind mechanism 2 includes a roller structure 22 and a curtain 21 connected to the roller structure 22. The roller structure 22 is installed on the upper frame 13. The roller structure 22 is capable of raising and lowering the curtain 21, allowing the curtain 21 to switch between a first state (closed) that completely covers the doorway and a second state (open) that exposes at least part of the doorway.

[0052] The accordion cover 3 is fixed to the upper frame 13 by the upper connector 33. The accordion cover 3 has a third state of being unfolded (closed) and a fourth state of being folded (open). In the third state, the accordion cover 3 covers the doorway. In the fourth state, the accordion cover 3 exposes at least part of the doorway.

[0053] In the thickness direction, the roller blind mechanism 2 and the accordion cover 3 are arranged side by side, with the accordion cover 3 located inside the roller blind mechanism 2. The free end of the curtain 21 is connected to the lower connecting body 34, so that when the curtain 21 is in the first state, the accordion cover 3 is in the third state, and when the curtain 21 is in the second state, the accordion cover 3 is in the fourth state.

[0054] Taking the application of a door structure in a squaring machine as an example, when the squaring machine is cutting silicon rods, the door structure is in the closed state, and at this time the curtain 21 is in the first state ( Figure 5(As shown), the accordion cover 3 is in the third state ( Figure 6 (As shown), both the curtain 21 and the accordion cover 3 cover the doorway, preventing contaminants (silica sludge, etc.) generated during silicon rod cutting from splashing out of the doorway and onto the outside of the squaring machine. Since the accordion cover 3 is inside the roller shutter mechanism 2, the sludge will hit the back (inner side) of the accordion cover 3. Because the accordion cover 3 completely covers the doorway, the sludge cannot cross the obstruction structure and hit the outer curtain 21, nor will it splash out of the doorway. This reduces the amount of contaminants adhering to the curtain 21. After the silicon rod cutting is completed, the door structure needs to be adjusted to the open position. In other words, the roller structure 22 is controlled to retract most of the curtain 21 into the roller structure 22, thereby exposing the doorway. Since the curtain 21 has few or no contaminants, the portion of the curtain 21 retracted into the roller structure 22 causes less contamination to the roller structure 22, thus reducing the clogging of the roller structure 22. Therefore, throughout the entire lifespan of the squaring machine, there is basically no need to disassemble and clean the roller mechanism 2, thereby reducing the labor intensity of the workers, improving the working efficiency of the squaring machine, and extending the working life of the roller mechanism 2.

[0055] When the lower end (free end) of the curtain 21 moves upward (for ease of description, this process is referred to as "the rising of the curtain 21"), since the lower end of the curtain 21 is connected to the lower end of the accordion cover 3, the lower end of the accordion cover 3 can also rise along with the curtain 21. Because both the lower ends of the curtain 21 and the accordion cover 3 rise, the lower part of the doorway will be exposed first. As both rise, the exposed area of ​​the doorway gradually increases until the curtain 21 is in the second state (the lower end of the curtain 21 is at its highest position) and the accordion cover 3 is in the fourth state (the lower end of the accordion cover 3 is at its highest position). At this point, the exposed area of ​​the doorway reaches its maximum. Figure 1 (As shown), the cut silicon rod can be removed from the squaring machine, and the silicon rod to be cut can be put into the squaring machine from the exposed part; when the door structure needs to be switched to the closed state, the roller structure 22 moves, causing the lower end of the curtain 21 to move downward (for ease of description, this process is called "the descent of the curtain 21"). Similarly, the lower end of the accordion cover 3 also moves downward until the curtain 21 is in the first state. At this time, the accordion cover 3 is in the third state. In this way, the accordion cover 3 can passively rise and fall with the curtain 21, so that the setting of the accordion cover 3 will not affect the opening and closing of the door opening, and can effectively protect the curtain 21 and prevent the roller structure 22 from being blocked.

[0056] Since contaminants adhere to the back of the bellows cover 3, it can be cleaned after a period of use. Because the bellows cover 3 is passively raised and lowered and there is no structure to store it, the contaminants on the bellows cover 3 will not contaminate other structures. When cleaning the bellows cover 3, it is not necessary to disassemble it. In this invention, the bellows cover 3 can be adjusted to the third state. In this state, the contaminants on the bellows cover 3 can be rinsed with a water gun, which is convenient and efficient.

[0057] The accordion cover 3 extends and retracts vertically. During this vertical extension and retraction, the lower end of the accordion cover 3 remains at its lowest position. The lower end of the curtain 21 connects to the lower end of the accordion cover 3, meaning their heights are always the same. Therefore, when the curtain 21 is in its second state, the portion of the doorway below the lower end of the curtain 21 is the actual opening of the doorway. In this fourth state, the lower end of the accordion cover 3 is at the same height as the lower end of the curtain 21, so the area of ​​the doorway below the lower end of the accordion cover 3 completely overlaps with the area of ​​the doorway below the lower end of the curtain 21. This maximizes the exposure of the doorway, facilitating the insertion or removal of the silicon rod.

[0058] It should be noted that the accordion cover 3 is better than the flexible curtain cloth embodiment in the background art. Specifically, taking the connection between the lower end of the curtain cloth and the lower end of the curtain cloth as an example, the curtain cloth is covered with pollutants, which increases its weight. Therefore, when the lower end of the curtain cloth is lifted by the roller blind mechanism 2, the load on the roller blind mechanism 2 will increase. However, in the embodiment using the accordion cover 3, the accordion cover 3 has a certain upward elasticity, which can offset part of the weight of the accordion cover 3. This makes it easier for the roller blind mechanism 2 to change the accordion cover 3 from the third state to the fourth state. Therefore, it is not necessary to replace the drive motor in the roller structure 22 with a drive motor with a higher output power, thus saving costs.

[0059] In addition, the accordion cover 3 adopts a double-folded structure (a first folded body 31 and a second folded body 32 arranged opposite to each other), which can enhance the overall strength of the accordion cover 3 and extend its service life. Moreover, the double-folded structure ensures that the accordion cover 3 will not bend when it is extended or retracted without the aid of other limiting structures, so that the accordion cover 3 can be extended or retracted in the vertical direction.

[0060] See Figure 3 and Figure 4The accordion cover 3 further includes a left connecting fold body 35 and a right connecting fold body 36. The left end of the first fold body 31 and the left end of the second fold body 32 are connected by the left connecting fold body 35, and their right ends are connected by the right connecting fold body 36, thus forming a closed structure. In some cases, contaminants may enter the left or right side of the accordion cover. The left connecting fold body 35 and the right connecting fold body 36 can prevent contaminants from entering the interior of the accordion cover 3 from the left or right side, avoiding the need for subsequent cleaning of the interior of the accordion cover 3.

[0061] When the bellows cover 3 extends or retracts, the volume of its internal space changes. That is, when the bellows cover 3 extends, its internal volume increases, and when the bellows cover 3 retracts, its internal volume decreases. In other words, when the bellows cover 3 extends, external air can enter the bellows cover 3, and when the bellows cover 3 retracts, the air inside the bellows cover 3 can be squeezed to the outside, so that the internal volume of the bellows cover 3 can change according to the needs. If the bellows cover 3 is completely sealed, so that the internal space of the bellows cover 3 is not connected with the outside, then the range of change of the internal volume of the bellows cover 3 is very small, which cannot meet the needs of the bellows cover 3's extension and retraction. Therefore, air holes (not shown in the figure) need to be provided on the bellows cover 3 to connect the internal space of the bellows cover 3 with the outside, so as to ensure that the bellows cover 3 can passively extend and retract.

[0062] Furthermore, the vents are preferably located on the left connecting fold body 35 and / or the right connecting fold body 36. Under normal circumstances, contaminants cannot enter the left and right sides of the bellows cover. Even if they can enter, very few contaminants will enter the left and right sides. Therefore, by setting the vents on the left connecting fold body 35 and the right connecting fold body 36, contaminants will not enter the interior of the bellows cover 3 through the vents, thereby avoiding the need for cleaning the interior of the bellows cover 3 later.

[0063] In another embodiment, the vent is located on the one of the first folding body 31 and the second folding body 32 closest to the roller shutter mechanism 2, that is, on the outer folding body. For example, the first folding body 31 is on the outside and the second folding body 32 is on the inside. The vent is located on the first folding body 31. Since the first folding body 31 is away from the inside of the machine, in actual use, contaminants splash onto the second folding body 32. The second folding body 32 does not have vents, so the contaminants cannot enter the inside of the bellows cover 3 from the second folding body 32. Even if some contaminants reach the left and right sides of the bellows cover 3, due to the arrangement of the left connecting folding body 35 and the right connecting folding body 36, and the fact that neither of them has vents, the contaminants will not enter the inside of the bellows cover 3 from the left and right sides. In any case, the contaminants will not reach the front of the bellows cover 3, that is, the contaminants cannot adhere to the first folding body 31 at all, so the contaminants will not enter the inside of the bellows cover 3 from the vents on the first folding body 31.

[0064] See Figure 4 Furthermore, both the first folding body 31 and the second folding body 32 include a plurality of upper folding pieces 38 and a plurality of lower folding pieces 39, which are staggered in the vertical direction. The upper folding pieces 38 face downwards and the lower folding pieces 39 face upwards. The air holes are provided on the upper folding pieces 38.

[0065] As for the first fold body, since the upper fold plate 38 faces downward, even if some pollutants flow onto the first fold body, the pollutants will not accumulate on the upper fold plate 38, but at most on the lower fold plate 39. Therefore, by setting the vent on the upper fold plate 38 and not setting the vent on the lower fold plate 39, it can be prevented that in extreme cases (when pollutants flow onto the first fold body 31), pollutants will enter the inside of the bellows cover 3 through the vent.

[0066] Preferably, in the left-right direction, the vent is located in the middle of the upper folding piece 38, which prolongs the path of pollutants to the vent and further reduces the possibility of pollutants entering the inside of the bellows cover 3.

[0067] Of course, the vents can also be set on the lower fold plate 39.

[0068] The shape and size of the vents are not limited, as long as they can meet the ventilation requirements during the expansion and contraction of the bellows cover 3.

[0069] A left gap is left between the left side of the accordion cover 3 and the left frame 11, and a right gap is left between the right side of the accordion cover 3 and the right frame 12.

[0070] It also includes a vertically arranged left baffle 41 and a right baffle. The left baffle 41 is installed on the left frame 11, and the right baffle is installed on the right frame 12. The two baffles are located on the side of the accordion cover 3 away from the roller blind mechanism 2. The left baffle 41 covers the left gap, and the right baffle covers the right gap.

[0071] The left and right gaps are designed so that when the accordion cover 3 is extended or retracted, the left and right sides of the accordion cover will not come into contact with the left and right frame frames, reducing the resistance when the accordion cover 3 is extended or retracted, and allowing the accordion cover 3 to extend or retract more smoothly.

[0072] As mentioned earlier, contaminants can enter the left and right gaps, thus contaminating the left side (left connecting fold 35) and right side (right connecting fold 36) of the bellows cover 3, making cleaning the bellows cover 3 more difficult. The left baffle 41 is connected to the inner side (back) of the left frame 11 and blocks the left gap on the inner side. Therefore, contaminants splashed towards the left gap will be blocked by the left baffle 41, preventing these contaminants from entering the left gap. Similarly, the right baffle can also block contaminants splashed towards the right gap. Thus, when cleaning the bellows cover 3, only the second fold 32 (the inner fold) needs to be cleaned, reducing the labor intensity of the staff.

[0073] In another embodiment, the left baffle 41 and the right baffle may not be provided. In this case, the left and right folding connectors need to be cleaned during the later cleaning process.

[0074] See Figure 2 and Figure 7 In embodiments including a left baffle 41 and a right baffle, the left baffle 41 and the right baffle are collectively referred to as baffles. In the left-right direction, the baffle includes a mounting portion 42, an inclined portion 43, and an extension portion 44 formed by sequential bending. The mounting portion 42 is connected to the support frame 1. The inclined portion 43 is inclined away from the side of the bellows cover 3, so that the extension portion 44 is farther away from the bellows cover 3 than the mounting portion 42. This arrangement leaves a gap between the extension portion 44 and the back of the bellows cover 3, so that the bellows cover 3 will not come into contact with the baffles during extension and retraction, reducing the resistance during extension and retraction of the bellows cover 3. In addition, the two baffles can also limit the bellows cover 3 to a certain extent, preventing the bellows cover 3 from bending inward during extension and retraction, ensuring the stability and effectiveness of the bellows cover 3 during extension and retraction.

[0075] Of course, the left baffle 41 and the right baffle can be straight plate structures.

[0076] The left end of the bellows cover 3 is provided with a left limiting groove 37, and the right end is provided with a right limiting groove.

[0077] See Figure 2 It also includes a vertical left guide rail groove 51 and a vertical right guide rail groove. The bottom of the left guide rail groove 51 is connected to the left frame 11, and the bottom of the right guide rail groove is connected to the right frame 12. One side wall of the guide rail structure away from the roller blind mechanism 2 cooperates with the corresponding limiting groove, and the other side wall of the guide rail structure cooperates with the side of the accordion cover 3 facing the roller blind mechanism 2.

[0078] The left limiting groove 37 can be set in the middle of the left end of the bellows cover 3 (the middle in the inward and outward direction), and the right limiting groove is set in the middle of the right end of the bellows cover 3. Both the left limiting groove 37 and the right limiting groove penetrate the bellows cover 3 in the vertical direction. The inner side wall of the left guide rail groove 51 (the side wall away from the roller shutter mechanism 2) cooperates with the left limiting groove 37. Similarly, the inner side wall of the right guide rail groove cooperates with the right limiting groove. In this way, the bellows cover 3 can be limited to extending and retracting in the vertical direction, and the extension and retraction direction of the bellows cover 3 can be oriented.

[0079] In addition, even if some pollutants enter the left or right gap, they will be blocked by the side walls of the left and right guide rail grooves as they flow outward, thus preventing the pollutants from continuing to flow outward and preventing them from contaminating the outer curtain 21.

[0080] The outer sidewall of the guide rail structure can also limit the accordion cover 3, ensuring that the accordion cover 3 can only extend and retract in the vertical direction.

[0081] See Figure 8 For the roller blind mechanism 2, the roller structure 22 includes a roller and a drive motor. The upper end of the curtain fabric 21 is connected to the roller. The drive motor drives the roller to rotate forward or backward, thereby causing the curtain fabric 21 to rise or fall. The roller blind mechanism 2 also includes a counterweight 23, which is connected to the free end (lower end) of the curtain fabric 21.

[0082] There is one counterweight 23, and its overall shape is rectangular. In the left and right direction, the length of the counterweight 23 is the same as the length of the curtain 21. That is, the left end of the counterweight 23 extends to the left side of the curtain 21, and the right end extends to the right side of the curtain 21. The setting of the counterweight 23 allows the extended part of the curtain 21 to be completely flattened, thereby improving the covering effect on the door opening. Moreover, when the roller rotates to retract the curtain 21, the curtain 21 can be rolled flat onto the roller, which facilitates the raising and lowering of the curtain 21 and ensures the stability of the raising and lowering.

[0083] In other embodiments, multiple counterweights 23 may be equally spaced at the free end of the curtain 21 along the left-right direction.

[0084] The counterweight 23 is detachably connected to the lower end of the accordion cover 3. When the curtain 21 descends, the counterweight 23 pulls the lower end of the accordion cover 3, causing the accordion cover 3 to descend together. This detachable connection allows for thorough cleaning of the accordion cover 3; the lower end of the curtain 21 can be separated from the lower end of the accordion cover 3, and the accordion cover 3 can then be removed from the support frame 1. Similarly, the upper end of the accordion cover 3 is also detachably connected to the upper frame 13. Detachable connections include threaded connections, snap-fit ​​connections, hook connections, or pin connections.

[0085] A gap is left between the lower side of the counterweight 23 and the free end of the curtain 21.

[0086] The roller blind mechanism 2 also includes an outer cover plate 24, which is connected to the counterweight 23 and located on the side away from the accordion cover 3. The lower side of the counterweight 23 is flush with the end of the free end of the curtain 21. In the left-right direction, the size of the outer cover plate 24 is smaller than the size of the door opening, so that there is a first distance between the left side of the outer cover plate 24 and the left frame 11 of the support frame 1, and a second distance between the right side of the outer cover plate 24 and the right frame 12 of the support frame 1.

[0087] In some cases, there are structures on the lower side of the door structure. In order to avoid interference between the counterweight 23 and these structures, a gap (safe distance) is left between the lower side of the counterweight 23 and the free end of the curtain 21. In the first state, the counterweight 23 is located on the upper side of the free end of the curtain 21. Since the curtain 21 is made of soft material, the curtain 21 covers these structures without affecting them, and ensures that the curtain 21 can completely cover the door opening in the first state.

[0088] However, the part of the curtain 21 under the counterweight 23 is not supported by any structure, so this part of the curtain 21 may turn outward. The present invention also provides an outer cover 24 to prevent this part of the curtain 21 from turning outward. The outer cover 24 has a first gap between itself and the left frame 11 and a second gap between itself and the right frame 12. This is to ensure that the outer cover 24 can also avoid the structures under the door structure. The first gap and the second gap can be equal or unequal and can be adjusted according to the actual situation.

[0089] The left frame 11 of the support frame 1 is provided with a left sliding groove 52, and the right frame 12 of the support frame 1 is provided with a right sliding groove. The left ends of the curtain 21 and the counterweight 23 are engaged with the left sliding groove 52, and the right ends of the curtain 21 and the counterweight 23 are engaged with the right sliding groove.

[0090] Both the left slide rail 52 and the right slide rail are set vertically to limit the direction of movement of the curtain 21 when it is raised or lowered, so that the curtain 21 can be smoothly raised or lowered.

[0091] The left frame 11, right frame 12 and top frame 13 can all be formed by bending profiles. Furthermore, the left slide 52 and right slide 52 can also be formed by bending, which simplifies the processing method of the support frame 1, improves the structural strength of the support frame 1, and facilitates the assembly of the support frame 1.

[0092] See also Figure 9 The present invention also relates to a squaring machine, including the aforementioned door structure, wherein the accordion cover 3 is located inside the roller shutter mechanism 2. The specific application of the door structure in the squaring machine has been described above and will not be repeated here.

[0093] The roller structure 22 can lift and lower the curtain 21, allowing the curtain 21 to switch between a first state and a second state. The upper end of the bellows cover 3 is fixed, and the lower end is connected to the free end of the curtain 21, so that the lifting and lowering curtain 21 can drive the bellows cover 3 to lift and lower. When the curtain 21 is in the first state, the bellows cover 3 is in the third state. At this time, the door opening is closed, so when pollutants splash from one side of the bellows cover 3, the pollutants will only splash onto the bellows cover 3, thereby avoiding the curtain 21 from being contaminated with pollutants. Therefore, when the curtain 21 is switched to the second state, since there are fewer pollutants on the curtain 21, the risk of the roller structure 22 being blocked is reduced. Thus, the roller shutter mechanism 2 in the door structure of the present invention does not need to be cleaned regularly, reducing the labor intensity of the workers. When applied to the squaring machine, it improves the cutting efficiency of silicon rods and extends the service life of the roller shutter mechanism 2. The accordion cover 3 passively switches between the third and fourth states along with the curtain 21, and there is no other structure to store the accordion cover 3. Therefore, the pollutants on the accordion cover 3 will not contaminate other structures. When cleaning the accordion cover 3, there is no need to disassemble the accordion cover 3. You can directly clean the accordion cover 3 with a water gun, which is convenient and efficient.

[0094] It should be understood that the above embodiments are merely exemplary and not restrictive. Various obvious or equivalent modifications or substitutions that can be made by those skilled in the art regarding the above details without departing from the basic principles of the present invention will be included within the scope of the claims of the present invention.

Claims

1. A door structure, characterized in that, This includes the support frame that forms the doorway, the roller shutter mechanism, and the accordion cover; The support frame includes a left frame, a top frame, and a right frame connected in sequence; The roller blind mechanism includes a roller structure and a curtain connected to the roller structure. The roller structure is installed on the upper frame and can retract and extend the curtain, allowing the curtain to switch between a first state that completely covers the doorway and a second state that exposes at least part of the doorway. The extension and retraction direction of the accordion cover is vertical. The accordion cover includes a first folding body, a second folding body, an upper connecting body, and a lower connecting body. In the thickness direction, the first folding body and the second folding body are arranged opposite to each other, and the upper end is connected through the upper connecting body, and the lower end is connected through the lower connecting body. The accordion cover is fixed to the upper frame by the upper connector. The accordion cover has a third unfolded state and a fourth folded state. In the third state, the accordion cover covers the doorway. In the fourth state, the accordion cover exposes at least part of the doorway. In the thickness direction, the roller blind mechanism is arranged side by side with the accordion cover. The free end of the curtain is connected to the lower connector, so that when the curtain is in the first state, the accordion cover is in the third state, and when the curtain is in the second state, the accordion cover is in the fourth state.

2. The door structure according to claim 1, characterized in that, The accordion cover also includes a left connecting fold body and a right connecting fold body. The left end of the first fold body and the left end of the second fold body are connected by the left connecting fold body, and the right ends of the two are connected by the right connecting fold body, so that the accordion cover forms a closed structure.

3. The door structure according to claim 2, characterized in that, Air holes are provided on the left connecting fold body and the right connecting fold body.

4. The door structure according to claim 2, characterized in that, An air hole is provided on the one of the first folding body and the second folding body that is closer to the roller blind mechanism.

5. The door structure according to claim 4, characterized in that, Both the first folding body and the second folding body include multiple upper folding pieces and multiple lower folding pieces, which are staggered in the vertical direction. The upper folding pieces face downwards, and the lower folding pieces face upwards. The air holes are provided on the upper folding pieces.

6. The door structure according to any one of claims 1-5, characterized in that, A left gap is left between the left side of the accordion cover and the left frame, and a right gap is left between the right side of the accordion cover and the right frame. It also includes a vertically arranged left baffle and a right baffle, the left baffle being installed on the left frame and the right baffle being installed on the right frame. The two baffles are located on the side of the accordion cover away from the roller blind mechanism, the left baffle covering the left gap and the right baffle covering the right gap.

7. The door structure according to claim 6, characterized in that, In the left-right direction, the baffle includes a mounting portion, an inclined portion, and an extension portion formed by bending in sequence. The mounting portion is connected to the support frame, and the inclined portion is inclined to the side away from the accordion cover, so that the extension portion is farther away from the accordion cover than the mounting portion.

8. The door structure according to claim 6, characterized in that, The left end of the bellows cover is provided with a left limiting groove, and the right end is provided with a right limiting groove; It also includes a vertical left guide rail groove and a vertical right guide rail groove. The bottom of the left guide rail groove is connected to the left frame, and the bottom of the right guide rail groove is connected to the right frame. One side wall of the two guide rail grooves away from the roller blind mechanism cooperates with the corresponding limiting groove, and the other side wall of the guide rail groove cooperates with the side of the accordion cover facing the roller blind mechanism.

9. The door structure according to any one of claims 1-5 or 7-8, characterized in that, The roller blind mechanism also includes a counterweight, which is connected to the free end of the curtain fabric.

10. The door structure according to claim 9, characterized in that, The counterweight is detachably connected to the lower end of the bellows cover.

11. The door structure according to claim 9, characterized in that, A gap is left between the lower side of the counterweight and the free end of the curtain; The roller blind mechanism also includes an outer cover plate, which is connected to the counterweight and located on the side away from the bellows cover. The lower side of the counterweight is flush with the free end of the curtain. In the left-right direction, the size of the outer cover plate is smaller than the size of the door opening, such that there is a first distance between the left side of the outer cover plate and the left frame of the support frame, and a second distance between the right side of the outer cover plate and the right frame of the support frame.

12. The door structure according to claim 9, characterized in that, The left frame of the support frame is provided with a left sliding groove, and the right frame of the support frame is provided with a right sliding groove. The left ends of the curtain and the counterweight are engaged with the left sliding groove, and the right ends of the curtain and the counterweight are engaged with the right sliding groove.

13. A square root extractor, characterized in that, The door structure includes any one of claims 1-12, wherein the accordion cover is located inside the roller blind mechanism.

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