CN211573344U

CN211573344U - Cartridge door curtain controlled by magnetic force

Info

Publication number: CN211573344U
Application number: CN201921874542.6U
Authority: CN
Inventors: 沈良霖; 大滝健
Original assignee: Zhejiang Yashijing Technology Co ltd
Current assignee: Zhejiang Yashijing Technology Co ltd
Priority date: 2019-09-28
Filing date: 2019-11-04
Publication date: 2020-09-25
Anticipated expiration: 2029-11-04

Abstract

The utility model relates to a glass, solar substrate, liquid crystal substrates (hereinafter glass for short) technical field specifically are the technical field of a magnetic control switch's card casket door curtain production, specifically are a card casket magnetic control switch door curtain for accomodating glass, include the door curtain main part and be located the drive arrangement in the door curtain main part outside, the door curtain main part is equipped with about the position of top axial extension and is used for twining the roll curtain axle of rolling up the curtain, roll up the epaxial magnetic force driven mechanism of installing of curtain, drive arrangement is last to have driving motor, install on driving motor's the motor shaft and be used for the drive magnetic force driven mechanism pivoted magnetic force initiative mechanism makes things convenient for the turnover card casket.

Description

Cartridge door curtain controlled by magnetic force

Technical Field

The utility model relates to the technical field of glass, solar substrates and liquid crystal substrates (hereinafter referred to as glass), in particular to a magnetic control switch door curtain for accommodating glass.

Background

The utility model relates to a glass production process, especially relate to some equipment in the turnover process, especially in the solar photovoltaic field, solar panel also all is the glass board, will have a large amount of glass boards to accomodate in the production process, turnover etc., the current card box of accomodating is used for accomodating the glass board very commonly and is used, and also all will be equipped with the door curtain that can open and close in the card box, and a lot of also all adopt the structure style of rolling slats door, the door curtain is on the fixed card box, it is automatic to reach the door curtain and open and close, need to provide power drive door curtain to the external world, but prior art all is through the direct connection transmission, door curtain and drive arrangement are fixed whole, can't accomplish the harmonious turnover use of card box, the card box can not obtain maximum rate of utilization, the production time is occupied for the most part, like the electric rolling slats door that publication number is 109372415A discloses, comprises an electric door rolling machine, a transmission support plate, a side plate assembly, a winding drum, a door curtain and a door curtain guide rail; the method is characterized in that: the winding drum is characterized in that rotating shafts are arranged at two ends of the winding drum, a metal brake disc is arranged at one end of the winding drum, heat dissipation holes are formed in the metal brake disc, and the metal brake disc penetrates through the rotating shafts and is fixed at one end of the winding drum through fixing bolts; the sideboard assembly includes sideboard, pivot fixing base and electronic brake device, sideboard central authorities are located to the pivot fixing base, electronic brake device locates pivot fixing base upside, the pivot of the reel one end that is equipped with the metal brake disc is fixed on the pivot fixing base and rotatable, electronic brake device brakes the metal brake disc, is this kind of fixed structure promptly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a make things convenient for door curtain of magnetic control switch of card casket turnover.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a magnetic force control switch's card casket door curtain, includes the door curtain main part and is located the drive arrangement in the door curtain main part outside, the door curtain main part leans on the position at top to be equipped with about the roll curtain axle that axial extension was used for twining the roll curtain, the epaxial magnetic force receiving mechanism of installing of roll curtain, the last driving motor that has of drive arrangement, install on driving motor's the motor shaft and be used for the drive magnetic force receiving mechanism pivoted magnetic force initiative mechanism.

As right the utility model discloses a preferred, the door curtain main part is the rectangular door body that forms by last door frame, lower door frame, left door frame and the concatenation of right door frame, the roll curtain axle erects left side door frame with on the right door frame, the roll curtain axle has and stretches out the outer extension section of door curtain main part, install on the extension section magnetic force actuated mechanism.

Preferably, the magnetic driven mechanism has a magnetic driven turntable attracted to the magnetic driving mechanism.

As right the utility model discloses a preferred, magnetic force driven mechanism still include with the driven fixed disk that the roll-up shaft was fixed, driven fixed disk still fixes magnetic force driven carousel.

Preferably, the magnetic driving mechanism has a magnetic force generating rotary plate that can attract the magnetic driven mechanism.

As right the utility model discloses a preferred, magnetic force drive mechanism still include with the initiative fixed disk that the motor shaft was fixed, the initiative fixed disk is still fixed the carousel takes place for magnetic force.

As right the utility model discloses a preferred, driving motor installs and is located on the mounting panel in the door curtain main part outside, cross about the motor shaft the mounting panel, driving motor's motor main part with magnetic force drive mechanism is in respectively the left and right sides of mounting panel.

As right the utility model discloses a preferred, the mounting panel is installed on the telescopic cylinder outside the door that the direction can stretch out and draw back about one.

As to the utility model discloses a preferred, driving motor is furnished with and installs spacing last spacing sensor when the confession door curtain of mounting panel downside upwards opens.

As right the utility model discloses a preferred, driving motor is furnished with and is used for setting up spacing lower limit sensor when door curtain main part downside position supplies the door curtain to close downwards.

The utility model has the advantages that: the utility model provides a door curtain main part is two independent bodies respectively with power device, in order to reach the automatic function of opening and closing of door curtain, need lead to the lift that the magnetic force conduction realized the door curtain between the two for the door curtain of card casket can be thrown power device and go to have enough to meet the need, makes the flexibility of card casket promote greatly, not only promotes at production glass in-process efficiency, also is very big help to producing high-quality glass moreover.

Drawings

Fig. 1 is a front view of an embodiment of the present invention;

FIG. 2 is an enlarged view at I of FIG. 1;

fig. 3 is a schematic perspective view of an embodiment of the present invention;

FIG. 4 is an enlarged view taken at II in FIG. 3;

fig. 5 is a plan view of the structure of the transmission part with the buffer sheet according to the embodiment of the present invention.

In the figure, 1, a door curtain main body, 2, a driving device, 3, a rolling shutter shaft, 4, a magnetic force driven mechanism, 20, a driving motor, 21, a motor shaft, 5, a magnetic force driving mechanism, 11, an upper door frame, 12, a lower door frame, 13, a left door frame, 14, a right door frame, 30, an extension section, 4b, a magnetic force driven rotary disc, 4a, a driven fixed disc, 5b, a magnetic force generation rotary disc, 5a, a driving fixed disc, 6, a mounting plate, 60, an outdoor telescopic cylinder, 61, an upper limit sensor, 62, a lower limit sensor, 54 and a buffer sheet.

Detailed Description

The following specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws and protection within the scope of the present invention.

The embodiment, as shown in fig. 1, 2, 3, 4, 5, a magnetic control switch's card casket door curtain, includes door curtain main part 1 and is located the drive arrangement 2 in the door curtain main part 1 outside, door curtain main part 1 leans on the position at top to be equipped with about axially extended and is used for twining the roll curtain roll up the roll curtain axle 3, install magnetic force driven mechanism 4 on the roll curtain axle 3, drive arrangement 2 is last to have driving motor 20, install on driving motor 20's the motor shaft 21 and be used for the drive magnetic force driven mechanism 4 pivoted magnetic force drive mechanism 5. Wherein, the magnetic force driven mechanism 4 is fixedly arranged on the rolling-up shaft 3 and can drive the rolling-up shaft 3 to rotate with the rolling-up shaft 3, the magnetic force driving mechanism 5 and the magnetic force driven mechanism 4 are two transmission structures which can be in non-contact type, because the two mechanisms can be connected by the attraction of the magnetic force in the axial direction to realize the non-contact type rotation, the magnetic force driving mechanism 5 can be connected with the magnetic force driven mechanism 4 in an attraction type and can also rotate the magnetic force driven mechanism 4, thereby the rolling-up shaft 3 can rotate to complete the lifting of the rolling-up curtain to realize the opening and closing of the door curtain, of course, the driving motor 20 needs to be in a bidirectional forward and reverse rotation mode, and the magnetic force attraction mode can be easily disassembled because of no hard-connected solid structure, thereby realizing the flexible use of the glass containing cassette, The glass containing cassette is convenient to turnover, because the glass containing cassette is generally placed on a specific cassette placing working platform for use, if the structure is adopted, the glass containing cassette can be turned over to different cassette placing working platforms for use, and turnover can be carried out through a forklift, so that extra waiting time of glass at stations of each process is reduced, the driving device 2 can be preset on the cassette placing working platform and is installed well, the magnetic driving mechanism 5 on the driving device 2 is preset, therefore, when the cassette comes, the position of the cassette is adjusted well, the magnetic driven mechanism 4 on the cassette door curtain is close to the magnetic driving mechanism 5, the door curtain can be opened and closed, so that the operation of cleanliness in the cassette and containing glass and the like can be effectively controlled, and the glass containing cassette is particularly suitable for a glass production line, and flexible turnover is realized. The cassette for producing large glass, especially more than one meter, and the working platform are large, so that the manual treatment is reduced as much as possible, and the process can be smoothly carried out.

Specifically, the door curtain main body 1 is a rectangular door body formed by splicing an upper door frame 11, a lower door frame 12, a left door frame 13 and a right door frame 14, the door frames adopt a non-magnetic structure of aluminum alloy as much as possible to reduce the influence on a magnetic driving mechanism 5 and a magnetic driven mechanism 4, the rolling curtain shaft 3 is erected on the left door frame 13 and the right door frame 14, and certainly, a bearing is required to be arranged on the door frames for supporting and smoothly rotating the rolling curtain shaft 3;

the roll-up shaft 3 has and stretches out the outer extension section 30 of door curtain main part 1, install on the extension section 30 magnetic force actuated mechanism 4, roll-up shaft 3 can adopt single axle construction, also can adopt many axostylus axostyles, axle sleeve to cup joint fixed axle construction etc. as long as can stretch out the door frame with roll-up shaft 3 in the door frame and carry out the transmission outward can, extension section 30 can set up on left side or right side, and this embodiment uses the left side as an example, and extension section 30 is exactly one section axial section that left door frame 13 was stretched out to the left to roll-up shaft 3 and installs magnetic force actuated mechanism 4 on this section.

Further, the magnetic driven mechanism 4 has a magnetic driven turntable 4b capable of attracting the magnetic driving mechanism 5, the magnetic driven turntable 4b may be a solid disc-shaped structure or an annular structure, and the magnetic driven turntable 4b and the rolling shutter shaft 3 should be kept coaxial as much as possible. The magnetic driven turntable 4b can adopt a magnetic cake or a magnetic ring with magnetic force, further can be made of rare earth magnetic materials or ferrite materials, of course, can also be made of steel materials and the like which can be attracted by magnetic force, or an electromagnetic structure that the outer part of the magnetic driven turntable 4b is a round cake or a circular shell and an electromagnetic coil and an iron core are arranged in the outer part, and the electromagnetic turntable can also generate magnetic force to cooperate with the magnetic driving mechanism 5 to carry out driven rotation;

the magnetic driven mechanism 4 can also comprise a driven fixed disk 4a fixed with the rolling shaft 3, the driven fixed disk 4a is arranged at the end of the rolling shaft 3, the driven fixed disk 4a can be provided with an axial sleeve hole to be sleeved at the left end of the rolling shaft 3, namely the left end of the extension section 30 and is fixed on the rolling shaft 3 through a radial bolt, the driven fixed disk and the driven fixed disk need to be provided with a radial corresponding hole for inserting the bolt, of course, other modes can be adopted for fixing, the magnetic driven turntable 4b is fixed on the left end surface of the driven fixed disk 4a, the driven fixed disk 4a can be designed into a structure which is integrally connected with the magnetic driven turntable 4b, namely, the driven fixed disk and the driven turntable can be fixed together through an integral forging or integral forming process during production, other locking parts are not needed for fixing, and the integral structure is most suitable for being manufactured by an integral processing process of the same material, the electromagnetic structure is not suitable for the electromagnetic structure, if the electromagnetic structure is adopted, the outer shells of the driven fixed disk 4a and the magnetic driven rotary disk 4b are both metal and are integrally formed, and the electromagnetic structure is arranged in the area of the magnetic driven rotary disk 4b in the metal outer shell, and the electromagnetic structure is adopted, the overall outline of the driven fixed disk 4a and the magnetic driven rotary disk 4b is preferably arranged in a round cake shape, namely, a flat cylindrical structure as shown in the figure, of course, the overall outline of the driven fixed disk 4a and the magnetic driven rotary disk 4b can also be preferably arranged in a ring shape, in addition, the driven fixed disk 4a and the magnetic driven rotary disk 4b can also be fixed by adopting a connecting mode of welding, screwing and the like, and the driven fixed disk 4a and the magnetic driven rotary disk 4b are also arranged coaxially as much as possible. It is further preferable that the diameter of the magnetic driven rotating disk 4b is larger than the diameter of the driven fixed disk 4a and is controlled to be 1.5-2 times as large as possible, and the diameter of the driven fixed disk 4a is preferably larger than the diameter of the extension section 30, of course, the axial directions of the driven fixed disk 4a and the magnetic driven rotating disk 4b are consistent with the rolling shutter shaft 3, that is, consistent with the extension section 30.

The magnetic driving mechanism 5 has a magnetic force generating rotary disc 5b capable of attracting the magnetic driven mechanism 4, when in use, the magnetic force generating rotary disc 5b is arranged on the left side of the magnetic driven rotary disc 4b, the two are opposite to each other left and right, and the magnetic direction between the two is kept in the left and right direction as much as possible, namely the axial direction of the roller shutter shaft 3. The material and structure of the magnetic force generating rotary disc 5b can refer to the design of the magnetic force driven rotary disc 4b, usually, the magnetic force generating rotary disc 5b is selected to be a magnetic rotary disc, the directions of the N pole and the S pole generating the magnetic force should be kept in the left and right directions, the magnetic force driven rotary disc 4b can be a structure body with magnetism, a ferromagnetic structure body attracted by the magnetic force, and the like, because the magnetic force generating rotary disc 5b is arranged on a driving device which is a platform needing to be arranged on a cassette placing working platform in a locked position, the magnetic force generating rotary disc 5b is always kept on the working platform and can not be used for turnover like a lock brake, so the magnetic force generating rotary disc can be used as a driving party of the magnetic force generation, is conveniently matched with the driven mechanism on each turnover cassette, is convenient for the control of the magnetic force, and if the magnetic force generating structure body is the electromagnetic force generating structure body, the magnetic force driven rotating disc 4b is preferably a structure with small magnetism and preferably no more than the magnetic force of the magnetic force generation rotating disc 5b, or a structure which is non-magnetic and can be attracted by the magnetic force is a good choice, and the magnetic force driven rotating disc 4b is also a structure which is non-magnetic and can be attracted by the magnetic force because of the requirement of the self circulation, and the electromagnetic structure is adopted because the operation of electrifying and the like is troublesome and is not very recommended, so the magnetic force driven rotating disc 4b is also the most recommended permanent magnetic structure or the structure which is non-magnetic and can be attracted by the magnetic force easily, however, if the magnetic force driven rotating disc 4b is a magnetic structure, the magnetic pole polarity of the side of the magnetic force driven rotating disc 4b, which is close to the magnetic force generation rotating disc 5b, should be opposite, so that both attract well. In addition, a buffering sheet 54 may be preferably fixed on the surface of the magnetic force generating turntable 5b opposite to the magnetic force driven turntable 4b, and is attached and fixed on the surface of the magnetic force generating turntable 5b by means of pasting or the like, the left and right thickness of the buffering sheet 54 is not more than 5mm as much as possible, so as to ensure that the magnetic force effect is not affected, and simultaneously reduce mechanical impact, bruise and the like well, and in operation, the magnetic force generating turntable 5b and the magnetic force driven turntable 4b may be attached and attached to the left and right sides of the buffering sheet 54 by magnetic attraction for better rotation operation, the buffering sheet 54 may be a sheet of silica gel or plastic type, the surface of the buffering sheet 54 on the side of the magnetic force driven turntable 4b may have a certain friction coefficient, such as the following arc-shaped protrusions or lines are added, provided that the surface of the magnetic force driven turntable 4b is not damaged, the buffering sheet 54 may be of a, the magnetic force generating disk 5b is preferably attached to a diameter of half the outer diameter of the magnetic force generating disk 5 b.

The magnetic driving mechanism 5 further comprises an active fixed disk 5a fixed with the motor shaft 21, the right end face of the active fixed disk 5a is fixed with the magnetic force generation turntable 5b, and the structure of the active fixed disk 5a can refer to the driven fixed disk 4 a.

The shapes and the sizes of the magnetic force generation rotary disc 5b and the magnetic force driven rotary disc 4b are set to be the same as much as possible, and the shapes and the sizes of the driving fixed disc 5a and the driven fixed disc 4a are also set to be the same as much as possible; the fixing manner of the motor shaft 21 and the driving fixing disk 5a can refer to the fixing manner of the driven fixing disk 4a and the roller shutter shaft 3.

The driving motor 20 is installed on the installation plate 6 located outside the door curtain main body 1, the motor shaft 21 transversely passes through the installation plate 6 from left to right, the motor main body of the driving motor 20 and the magnetic driving mechanism 5 are respectively arranged on the left side and the right side of the installation plate 6, and the plate surface orientation of the installation plate 6 is also in the left-right direction.

The mounting plate 6 is mounted on an outdoor telescopic cylinder 60 which can be telescopic in the left-right direction. Specifically, the piston rod of the outdoor telescopic cylinder 60 is located at the right side of the main body and can be stretched in the right area of the main body, and the mounting plate 6 is mounted on the piston rod of the outdoor telescopic cylinder 60, so that the mounting plate 6 can transversely move left and right, and the driving motor 20 can move left and right, and the magnetic driving mechanism 5 can move left and right, so that the magnetic driving mechanism 5 has the capability of stretching left and right, and the magnetic driving mechanism 5 can be contracted by the outdoor telescopic cylinder 60 when not in use as much as possible, so that the safety can be improved, the occurrence of accidental friction and the like between the magnetic driving mechanism 5 and other equipment can be reduced, when in use, the piston rod of the outdoor telescopic cylinder 60 extends right to drive the magnetic driving mechanism 5 to be close to the magnetic driven mechanism 4 on the door curtain main body of the position-adjusted brake, the magnetic force generation rotary table 5b is just close to the magnetic force driven rotary table 4b to generate magnetic attraction, and then the rolling blind shaft 3 can rotate forward and backward to drive the rolling blind to roll up and put down through the forward and backward rotation of the motor, so that the opening and closing operation of the door blind is realized.

The motor main body of the outdoor telescopic cylinder 60 and the motor main body of the driving motor 20 are preferably arranged on the same side of the mounting plate 6, as the above preferred structure, the motor main body and the outdoor telescopic cylinder 60 are all arranged on the left side of the mounting plate 6, the magnetic driving mechanism 5 is arranged on the right side of the mounting plate 6, the motor main body of the driving motor 20 and the outdoor telescopic cylinder 60 can be arranged side by side in the direction from the outside of the cartridge door to the inside of the cartridge door, the piston rods of the motor main body of the driving motor 20 and the outdoor telescopic cylinder 60 can be fixedly arranged on the mounting plate 6 in a fixing mode such as screws, and the main body of the outdoor telescopic cylinder 60 can be fixedly arranged on the cartridge placing working platform in a fixing mode such as screws, so that the magnetic driving mechanism 5, the driving device and the outdoor telescopic cylinder 60 are all located outside the cartridge door and are left.

In addition, the driving motor 20 is provided with an upper limit sensor 61 which is arranged at the lower side of the mounting plate 6 and used for limiting when the door curtain is opened upwards; the driving motor 20 is further provided with a lower limit sensor 62 for setting a lower side position of the door curtain main body 1 for limiting when the door curtain is closed downwards. The two sensors are electrically connected to a motor controller, the motor controller can adopt an existing conventional controller, the driving motor 20 is controlled by the motor controller to perform switching, steering, rotating speed adjustment and other operations, for example, when the roller shutter is rolled up and opened, the upper limit sensor 61 receives information that the roller shutter is rolled up to a preset highest position, the motor is controlled to stop running, when the door shutter is rolled down and closed, the lower limit sensor 62 receives information that the roller shutter is rolled down to a preset lowest position, the motor can also be controlled to stop running, and the sensors can adopt an existing displacement sensor, an existing infrared sensor and the like. Upper limit sensor 61 may be mounted on an upper end portion of left door frame 13, and lower limit sensor 62 may be mounted on a lower end portion of lower door frame 12.

The working process is roughly as follows: 1. an outer telescopic cylinder 60 on the platform drives the driving motor 20 to contract to an initial position;

2. the forklift puts the cassette which is transferred onto the platform and carries out position positioning;

3. the out-door telescopic cylinder 60 drives the driving motor 20 to extend out, so that the magnetic force generation turntable 5b is close to the magnetic force driven turntable 4 b;

4. the driving motor 20 rotates, so that the rolling shutter shaft 3 is driven to operate to roll up the rolling shutter to open the door curtain;

5. when the door curtain is lifted to a set height, the door curtain touches the upper limit sensor, the driving motor 20 stops, and the door curtain is in a maximum opening state;

6. carrying out glass containing work in the cassette and completing the glass containing work;

7. the driving motor 20 rotates reversely and depends on the dead weight of the door curtain to close the door curtain;

8. when the door curtain falls to the set height, the door curtain touches the lower limit sensor, the driving motor 20 stops, and the door curtain is in a closed state.

Through the steps, the clamping boxes can complete glass storage work and cleanly store glass, the glass is stored, the clamping boxes can leave the clamping box placing working platform, the clamping boxes can be moved out of the platform, then the clamping box placing working platform can continue to carry out glass storage work of other clamping boxes, and the clamping boxes completing the work can be transported to a next process station.

Claims

1. The utility model provides a magnetic force control switch's card casket door curtain which characterized in that: including door curtain main part (1) and being located drive arrangement (2) in door curtain main part (1) outside, door curtain main part (1) leans on the position at top to be equipped with about the axial extension and is used for winding the roll curtain roll up curtain axle (3), it receives actuating mechanism (4) to install magnetic force on roll curtain axle (3), drive arrangement (2) are gone up and have driving motor (20), install on motor shaft (21) of driving motor (20) and be used for the drive magnetic force receives actuating mechanism (4) pivoted magnetic force driving mechanism (5).

2. The cassette door curtain of a magnetically controlled switch as claimed in claim 1, wherein: door curtain main part (1) is the rectangle door body that forms by last door frame (11), lower door frame (12), left door frame (13) and right door frame (14) concatenation, roll up curtain axle (3) and erect left side door frame (13) with on right side door frame (14), roll up curtain axle (3) and have and stretch out the outer extension section (30) of door curtain main part (1), install on extension section (30) magnetic force driven mechanism (4).

3. The cassette door curtain of a magnetically controlled switch as claimed in claim 2, wherein: the magnetic driven mechanism (4) is provided with a magnetic driven turntable (4 b) which can be attracted with the magnetic driving mechanism (5).

4. The cassette door curtain of a magnetically controlled switch as claimed in claim 3, wherein: magnetic force driven mechanism (4) still include with roll up driven fixed disk (4 a) that curtain axle (3) were fixed, driven fixed disk (4 a) still fix magnetic force driven carousel (4 b).

5. The cassette door curtain of a magnetically controlled switch as claimed in claim 1, wherein: the magnetic driving mechanism (5) is provided with a magnetic force generation turntable (5 b) which can be attracted with the magnetic driven mechanism (4).

6. The cassette door curtain of a magnetically controlled switch as claimed in claim 5, wherein: the magnetic driving mechanism (5) further comprises a driving fixed disc (5 a) fixed with the motor shaft (21), and the driving fixed disc (5 a) further fixes the magnetic force generation turntable (5 b).

7. The cassette door curtain of a magnetically controlled switch as claimed in claim 1, wherein: driving motor (20) are installed and are located mounting panel (6) in door curtain main part (1) outside, cross about motor shaft (21) mounting panel (6), the motor main part of driving motor (20) with magnetic force drive mechanism (5) are respectively in the left and right sides of mounting panel (6).

8. The cassette door curtain of a magnetically controlled switch of claim 7, wherein: the mounting plate (6) is mounted on an outdoor telescopic cylinder (60) which can be telescopic in the left-right direction.

9. The cassette door curtain of a magnetically controlled switch of claim 7, wherein: the driving motor (20) is provided with an upper limit sensor (61) which is arranged on the lower side of the mounting plate (6) and used for limiting when the door curtain is opened upwards.

10. The cassette door curtain of a magnetically controlled switch of claim 8, wherein: the driving motor (20) is provided with a lower limit sensor (62) which is used for setting the lower side position of the door curtain main body (1) for limiting when the door curtain is closed downwards.