CN215485451U - Sliding door structure with guide rod - Google Patents

Abstract

The utility model relates to a sliding door structure with a guide rod, which is characterized by comprising the guide rod, a sliding door leaf and at least two groups of limiting roller groups, wherein each limiting roller group comprises an upper limiting roller and a lower limiting roller; the guide rod is horizontally arranged, the limiting roller groups are horizontally arranged on the push-pull door leaf side by side, the upper annular clamping grooves in the limiting roller groups are all clamped on the upper portion of the guide rod in a rolling mode, and the lower annular clamping grooves in the limiting roller groups are all clamped on the lower portion of the guide rod in a rolling mode. The utility model has the advantages of simple structure, high reliability, good safety, low manufacturing cost, good applicability and the like.

Description

Sliding door structure with guide rod

Technical Field

The utility model relates to the field of shower compartments, in particular to a sliding door structure.

Background

At present, most shower compartments adopt sliding doors. In order to achieve the limit guidance of sliding doors, profile guide bars are currently used to support and guide sliding doors. In order to enhance the stability of the limiting and guiding function, a guide groove or a guide convex strip is generally arranged on the profile guide strip. Most of the existing profile guide bars are quite complex in structure, the manufacturing difficulty and the manufacturing cost are quite high, and therefore the production cost of the sliding door can be increased. Therefore, it is necessary to redesign the structure of the sliding door.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and the defects and provides a sliding door structure with a guide rod, which has the advantages of simple structure, high reliability, good safety, low manufacturing cost, good applicability and the like.

The technical scheme of the utility model is realized as follows:

a sliding door structure with a guide rod is characterized by comprising the guide rod, a sliding door leaf and at least two groups of limiting roller groups, wherein each limiting roller group comprises an upper limiting roller and a lower limiting roller; the guide rod is horizontally arranged, the limiting roller groups are horizontally arranged on the push-pull door leaf side by side, the upper annular clamping grooves in the limiting roller groups are all clamped on the upper portion of the guide rod in a rolling mode, and the lower annular clamping grooves in the limiting roller groups are all clamped on the lower portion of the guide rod in a rolling mode.

Preferably, the radial section of the guide rod is circular, the groove wall of the upper annular clamping groove is arc-shaped matched with the surface of the guide rod, and the groove wall of the lower annular clamping groove is arc-shaped matched with the surface of the guide rod.

Preferably, the sliding door structure with the guide rod further comprises a first positioning assembly, the first positioning assembly comprises a seat body and a first screw, an insertion hole is formed in the seat body, the end portion of the guide rod is movably inserted into the insertion hole, the first screw is screwed on the seat body, the end portion of the first screw penetrates into the insertion hole, and the end portion of the first screw is pressed against the circumferential surface of the guide rod.

Preferably, the base body comprises a positioning seat, a positioning sleeve and a second screw, wherein the positioning seat is provided with a sleeve convex part, an inner hole of the positioning sleeve forms an insertion hole, one end of the positioning sleeve is sleeved on the sleeve convex part, the first screw and the second screw are both screwed on the positioning sleeve, the end part of the second screw penetrates into the insertion hole, and the second screw is pressed on the circumferential surface of the sleeve convex part.

Preferably, a through waist-shaped hole is formed in the positioning seat.

Preferably, the end face of the outer end of the sleeving convex part is provided with a hiding groove, and the waist-shaped hole is positioned at the bottom of the hiding groove.

Preferably, the circumferential surface of the sleeve convex part is provided with a limit ring groove, and the end part of the second screw is embedded in the limit ring groove.

Preferably, the sliding door structure with the guide rod further comprises a clamping base and a positioning screw, wherein a positioning convex column is arranged on the clamping base, and a threaded end of the positioning screw penetrates through the kidney-shaped hole and then is in threaded connection with the positioning convex column.

Preferably, the sliding door structure with the guide rod further comprises an upper positioning assembly, the upper positioning assembly comprises a first film, a second film, a first clamping piece, a second clamping piece, a first positioning shaft and a third screw, the first film and the second film are respectively attached to the inner surface and the outer surface of the sliding door leaf, the first clamping piece and the second clamping piece are respectively pressed on the outer surface of the first film and the outer surface of the second film, the upper limiting roller can be rotatably sleeved on the first positioning shaft, and the threaded end of the third screw sequentially penetrates through the first clamping piece, the first film, the sliding door leaf, the second film and the second clamping piece and then is in threaded connection with the first positioning shaft.

Preferably, the sliding door structure with the guide rod further comprises a lower positioning assembly, the lower positioning assembly comprises a third film, a fourth film, a third clamping piece, a fourth clamping piece, a second positioning shaft and a fourth screw, the third film and the fourth film are respectively attached to the inner surface and the outer surface of the sliding door leaf, the third clamping piece and the fourth clamping piece are respectively pressed on the outer surface of the third film and the outer surface of the fourth film, the lower positioning roller can be rotatably sleeved on the second positioning shaft, and the threaded end of the fourth screw sequentially penetrates through the third clamping piece, the third film, the sliding door leaf, the fourth film and the fourth clamping piece and then is screwed on the second positioning shaft.

The utility model has the beneficial effects that: in the sliding door structure of the utility model, the guide rod is only a rod-shaped structure. And the structure of the upper limiting roller and the lower limiting roller is very simple. The integral structure of this push-and-pull door structure is very simple like this, and this can reduce the manufacturing degree of difficulty of push-and-pull door structure effectively to help reducing the manufacturing cost of push-and-pull door structure. Because the upper limiting idler wheel and the lower limiting idler wheel are respectively provided with an upper annular clamping groove and a lower annular clamping groove, and the upper annular clamping groove and the lower annular clamping groove are respectively and rotatably clamped at the upper part and the lower part of the guide rod. Therefore, the push-pull requirement of the push-pull door leaf can be met, and the push-pull door leaf can be limited and guided reliably to avoid derailment, so that the safety, reliability and applicability of the structure of the push-pull door can be improved.

Drawings

Fig. 1 is a schematic perspective view of a sliding door structure according to the present invention.

Fig. 2 is a schematic structural diagram of a limiting roller set in the utility model.

Fig. 3 is a schematic diagram of a disassembled structure of the upper positioning assembly of the present invention.

Fig. 4 is a schematic diagram of a disassembled structure of the lower positioning assembly of the present invention.

Fig. 5 is a schematic perspective view of a first positioning assembly according to the present invention.

Fig. 6 is a schematic diagram of a disassembled structure of the first positioning assembly of the present invention.

Fig. 7 is a schematic sectional view of the positioning base of the present invention.

Fig. 8 is a schematic structural view of the sliding door according to the present invention in a use state.

Fig. 9 is a second structural schematic view of the sliding door according to the present invention in a use state.

Detailed Description

As shown in fig. 1, the sliding door structure with a guide rod of the present invention includes a guide rod 1, a sliding door leaf 2, and at least two sets of limiting roller sets 3, wherein, as shown in fig. 1 and fig. 2, the limiting roller sets 3 include an upper limiting roller 31 and a lower limiting roller 32, an upper annular slot 311 is disposed on an outer circumferential surface of the upper limiting roller 31, a lower annular slot 321 is disposed on an outer circumferential surface of the lower limiting roller 32, and the upper limiting roller 31 and the lower limiting roller 32 are disposed on the sliding door leaf 2 side by side up and down; as shown in fig. 1, the guide rod 1 is horizontally arranged, the limit roller sets 3 are horizontally arranged on the sliding door leaf 2 side by side, the upper ring-shaped slots 311 on the limit roller sets 3 are all rolled and clamped on the upper portion of the guide rod 1, and the lower ring-shaped slots 321 on the limit roller sets 3 are all rolled and clamped on the lower portion of the guide rod 1.

In the sliding door structure of the present invention, the guide bar 1 is only a rod-shaped structure. And the structure of the upper limiting roller 31 and the lower limiting roller 32 is very simple. The integral structure of this push-and-pull door structure is very simple like this, and this can reduce the manufacturing degree of difficulty of push-and-pull door structure effectively to help reducing the manufacturing cost of push-and-pull door structure.

Because the upper limiting roller 31 and the lower limiting roller 32 are respectively provided with an upper annular clamping groove 311 and a lower annular clamping groove 321, and the upper annular clamping groove 311 and the lower annular clamping groove 321 are respectively and rollably clamped on the upper part and the lower part of the guide rod 1. Can not only satisfy push-and-pull door leaf 2's push-and-pull demand like this, can also play very reliable spacing guide effect to push-and-pull door leaf 2 to avoid appearing the condition of derailing, thereby help improving security, reliability and the suitability of this push-and-pull door structure.

As shown in fig. 1 and 2, the radial cross section of the guide rod 1 is circular, the groove wall of the upper ring-shaped groove 311 is arc-shaped and matched with the surface of the guide rod 1, and the groove wall of the lower ring-shaped groove 321 is arc-shaped and matched with the surface of the guide rod 1. Such structure is made not only very conveniently, can play very good spacing guide effect moreover to help further improving the smoothness nature and the stationarity of 2 switches of sliding door leaf, and then help further improving the reliability of this sliding door structure.

As shown in fig. 1, 5 and 6, the sliding door structure with a guide rod further includes a first positioning assembly 4, the first positioning assembly 4 includes a seat body 41 and a first screw 42, the seat body 41 is provided with an insertion hole 411, an end portion of the guide rod 1 is movably inserted into the insertion hole 411, the first screw 42 is screwed on the seat body 41, and the end portion of the first screw 42 is inserted into the insertion hole 411, and the end portion of the first screw 42 is pressed against the circumferential surface of the guide rod 1. On this first locating component 4, the accessible is loosened first screw 42, and the amount of inserting of guide bar 1 in cartridge hole 411 is adjusted, just so can play the purpose of horizontal adjustment guide bar 1 position to avoid the error to influence the installation of guide bar 1, this helps further to improve the reliability and the suitability of this push-and-pull door structure.

As shown in fig. 1 and fig. 5 to fig. 7, the base 41 includes a positioning seat 412, a positioning sleeve 413, and a second screw 414, the positioning seat 412 is provided with a sleeve convex portion 415, an inner hole of the positioning sleeve 413 forms an insertion hole 411, one end of the positioning sleeve 413 is sleeved on the sleeve convex portion 415, the first screw 42 and the second screw 414 are both screwed on the positioning sleeve 413, and an end portion of the second screw 414 is inserted into the insertion hole 411, and the second screw 414 is pressed against a circumferential surface of the sleeve convex portion 415. Due to the structural design, the convenience of disassembling and maintaining the guide rod 1 is improved. When the guide bar 1 needs to be detached, the positioning sleeve 413 can be slid onto the guide bar 1 after the first screw 42 and the second screw 414 are loosened, so that the purpose of rapidly detaching the guide bar 1 can be achieved. Especially when the positioning seat 412 is fixed on the wall, adopt such structure, can not only avoid destroying the wall, can also avoid positioning seat 412 installation positioning's stability to receive the influence, this suitability that helps further improving this push-and-pull door structure.

As shown in fig. 6, two or more first screws 42 and second screws 414 may be provided to be locked in an actual manufacturing process. This helps to improve the reliability and stability of the locking.

As shown in fig. 5 and 7, the positioning seat 412 is provided with a through waist-shaped hole 416. Through the establishment of waist shape hole 416, can not only conveniently fix positioning seat 412 through the screw, can also satisfy the purpose of adjusting positioning seat 412 position after loosening the screw, this suitability that helps further to improve this push-and-pull door structure.

As shown in fig. 7, the outer end surface of the engaging protrusion 415 is provided with a storage groove 417, and the waist-shaped hole 416 is located at the bottom of the storage groove 417. The sleeve joint convex part 415 is provided with the storage groove 417, and the waist-shaped hole 416 is positioned at the groove bottom of the storage groove 417, so that when the positioning seat 412 is fixed through the screw, the screw can be completely hidden in the positioning sleeve 413, so that the water and dust of the screw are prevented from falling on the screw, the probability of corrosion and clamping stagnation of the screw can be greatly reduced, the convenience, the reliability and the service life of maintenance of the sliding door structure can be improved, and the attractiveness and the grade of the sliding door structure can be improved.

As shown in fig. 6 and 7, a limiting ring groove 418 is formed on the circumferential surface of the socket convex portion 415, and the end of the second screw 414 is embedded in the limiting ring groove 418. By embedding the end of the second screw 414 in the limiting ring groove 418, the stability and reliability of the installation and positioning of the positioning sleeve 413 can be further improved. And by adopting the annular limiting ring groove 418, the second screw 414 can conveniently act in the limiting ring groove 418, and the installation and the positioning are very convenient.

As shown in fig. 1 and 6, the sliding door structure with the guide rod further includes a clamping seat 43 and a positioning screw 44, wherein the clamping seat 43 is provided with a positioning convex column 431, and a threaded end of the positioning screw 44 passes through the kidney-shaped hole 416 and then is screwed on the positioning convex column 431. The clamping seat 43 can cooperate with the positioning seat 412 to clamp the shower partition, so that the end of the guide rod 1 can be connected to the partition of the shower partition, which further improves the applicability of the sliding door structure.

As shown in fig. 1, 8 and 9, first positioning units 4 may be provided at both ends of the guide bar 1. When the first positioning member 4 is to be mounted on a wall, the holder 43 is not clamped. When the first positioning assembly 4 needs to be installed on the partition board, the clamping seat 43 needs to be used, so that the requirement of practical use can be well met.

The horizontal adjustment range of the guide rod 1 can reach 20 mm. This push-and-pull door structure is applicable to the great place of installation size error like this.

As shown in fig. 8 and 9, in actual installation, the positioning seat 412 and the clamping seat 43 are respectively arranged on the inner and outer surfaces of the partition board 10, the positioning boss 431 is embedded on the partition board 10, and the threaded end of the positioning screw 44 is screwed on the positioning boss 431 after passing through the kidney-shaped hole 416. This allows the first positioning member 4 to be stably mounted on the partition wall 10, thereby allowing the guide bar 1 to be stably coupled to the partition wall 10.

As shown in fig. 8 and 9, the inner transparent adhesive tape 100 is clamped on the side of the sliding door leaf 2, the inner transparent adhesive tape 100 faces the fixed partition board 200 or is attached to the inner surface of the fixed partition board 200, the outer transparent adhesive tape 300 is clamped on the frame of the shower partition doorway, that is, the outer transparent adhesive tape 300 is arranged on the side of the fixed partition board 200, and the outer transparent adhesive tape 300 faces the sliding door leaf 2 or is attached to the sliding door leaf 2. Can improve shower spaced waterproof performance like this, and after the adhesive tape has transparent characteristics, enable product outward appearance more integration.

In the actual manufacturing process, in order to further improve the stability of the installation and positioning of the guide rod 1, the partition board can be connected with the middle part of the guide rod 1 through a screw. Therefore, the stability and the reliability of the installation and the positioning of the guide rod 1 can be effectively improved.

As shown in fig. 1, 8 and 9, in an actual manufacturing process, the sliding door 2 is prevented from being deflected or tilted. A guide groove body 20 may be provided on the lower side of the sliding door leaf 2. So as to play a role of limiting and guiding the lower part of the sliding door leaf 2 through the guide groove body 20. This push-and-pull door structure just can satisfy the demand of in-service use well like this.

As shown in fig. 1 to 3, the sliding door structure with the guide rod further includes an upper positioning assembly 5, the upper positioning assembly 5 includes a first film 51, a second film 52, a first clamping piece 53, a second clamping piece 54, a first positioning shaft 55, and a third screw 56, the first film 51 and the second film 52 are respectively attached to the inner and outer surfaces of the sliding door leaf 2, the first clamping piece 53 and the second clamping piece 54 are respectively pressed on the outer surface of the first film 51 and the outer surface of the second film 52, the upper limiting roller 31 is rotatably sleeved on the first positioning shaft 55, and the threaded end of the third screw 56 is sequentially threaded on the first positioning shaft 55 after passing through the first film 53, the first film 51, the sliding door leaf 2, the second film 52, and the second clamping piece 54. The upper positioning component 5 is very simple and reliable in structure, so that the stability and reliability of the installation and positioning of the upper limiting roller 31 can be effectively improved. The first film 51 and the second film 52 are arranged to prevent the first clip 53 and the second clip 54 from clamping and pushing the door leaf 2.

As shown in fig. 1 to 3, when the sliding door 2 is made of a glass plate, the glass plate can be well protected by the first and second films 51 and 52, and the reliability and stability of the locking of the upper positioning assembly 5 can be improved. In order to protect the glass plate better, a first rubber cover 57 may be provided between the first rubber sheet 51 and the second rubber sheet 52, the first rubber cover 57 may be embedded in the sliding door leaf 2, and the third screw 56 may be inserted through the first rubber cover 57. This provides better protection.

As shown in fig. 3, in order to further improve the smoothness of the rotation of the upper limiting roller 31, a first bearing 58 may be fitted into the upper limiting roller 31, and the first positioning shaft 55 may be inserted into the first bearing 58. This effectively improves the smoothness of the rotation of the upper restricting roller 31.

As shown in fig. 3, the first positioning shaft 55 is a stepped shaft with a large end and a small end, the inner hole of the upper limiting roller 31 is a stepped hole matched with the first positioning shaft 55, and the small end of the inner hole of the upper limiting roller 31 faces the sliding door leaf 2, a first limiting sleeve 59 is arranged between the second clamping piece 54 and the first bearing 58, two ends of the first limiting sleeve 59 are respectively pressed against the outer wall of the second clamping piece 54 and the inner ring of the first bearing 58, and the threaded end of the third screw 56 passes through the first limiting sleeve 59 and then is screwed on the small end of the first positioning shaft 55. This contributes to further improving the stability and reliability of the mounting and positioning of the upper limiting roller 31.

In the actual manufacturing process, stainless steel may be used for the other components than the sliding door leaf 2. Therefore, the structural strength can be improved, the durability can be improved, and the waterproof, moistureproof and rustproof performances are very good.

As shown in fig. 1, 2 and 4, the sliding door structure with the guide rod further includes a lower positioning assembly 6, the lower positioning assembly 6 includes a third film 61, a fourth film 62, a third clip 63, a fourth clip 64, a second positioning shaft 65 and a fourth screw 66, the third film 61 and the fourth film 62 are respectively attached to the inner and outer surfaces of the sliding door leaf 2, the third clip 63 and the fourth clip 64 are respectively pressed on the outer surface of the third film 61 and the outer surface of the fourth film 62, the lower limiting roller 32 can be rotatably sleeved on the second positioning shaft 65, and the threaded end of the fourth screw 66 is sequentially threaded on the second positioning shaft 65 after passing through the third clip 63, the third film 61, the sliding door leaf 2, the fourth film 62 and the fourth clip 64. The lower positioning component 6 has a very simple and reliable structure, so that the stability and reliability of the installation and positioning of the lower limiting roller 32 can be effectively improved. The third film 61 and the fourth film 62 are arranged to prevent the third clip 63 and the fourth clip 64 from clamping and pushing the door leaf 2.

As shown in fig. 1 and 4, when the sliding door 2 is made of a glass plate, the glass plate can be well protected by the third and fourth films 61 and 62, and the reliability and stability of locking of the lower positioning assembly 6 can be improved. In order to protect the glass plate better, a third rubber sleeve 67 may be provided between the third rubber sheet 61 and the fourth rubber sheet 62, the third rubber sleeve 67 may be embedded in the sliding door leaf 2, and the fourth screw 66 may be inserted through the third rubber sleeve 67. This provides better protection.

As shown in fig. 4, in order to further improve the smoothness of the rotation of the lower limiting roller 32, an upper second bearing 68 may be fitted into the lower limiting roller 32, and the second positioning shaft 65 may be inserted into the second bearing 68. This effectively improves the smoothness of the rotation of the lower limit roller 32.

As shown in fig. 4, the second positioning shaft 65 is a stepped shaft with a large end and a small end, the inner hole of the lower limiting roller 32 is a stepped hole matched with the second positioning shaft 65, and the small end of the inner hole of the lower limiting roller 32 faces the sliding door leaf 2, a second limiting sleeve 69 is arranged between the fourth clamping piece 64 and the second bearing 68, two ends of the second limiting sleeve 69 are respectively pressed against the outer wall of the fourth clamping piece 64 and the inner ring of the second bearing 68, and the threaded end of the fourth screw 66 passes through the second limiting sleeve 69 and then is screwed on the small end of the second positioning shaft 65. This contributes to further improving the stability and reliability of the mounting and positioning of the lower limiting roller 32.

Claims (10)

1. The utility model provides a push-and-pull door structure with guide bar which characterized in that: comprises a guide rod (1), a sliding door leaf (2) and at least two groups of limiting roller groups (3), wherein

The limiting roller group (3) comprises an upper limiting roller (31) and a lower limiting roller (32), an upper annular clamping groove (311) is formed in the outer circumferential surface of the upper limiting roller (31), a lower annular clamping groove (321) is formed in the outer circumferential surface of the lower limiting roller (32), and the upper limiting roller (31) and the lower limiting roller (32) are arranged on the sliding door leaf (2) in a vertical side-by-side mode;

the guide rod (1) is horizontally arranged, the limiting roller groups (3) are horizontally arranged on the sliding door leaf (2) side by side, the upper annular clamping grooves (311) on the limiting roller groups (3) are all clamped on the upper portion of the guide rod (1) in a rolling mode, and the lower annular clamping grooves (321) on the limiting roller groups (3) are all clamped on the lower portion of the guide rod (1) in a rolling mode.

2. A sliding door structure with a guide bar according to claim 1, characterized in that: the radial section of the guide rod (1) is circular, the groove wall of the upper annular clamping groove (311) is arc-shaped and matched with the surface of the guide rod (1), and the groove wall of the lower annular clamping groove (321) is arc-shaped and matched with the surface of the guide rod (1).

3. A sliding door structure with a guide bar according to claim 1, characterized in that: the positioning device is characterized by further comprising a first positioning assembly (4), wherein the first positioning assembly (4) comprises a base body (41) and a first screw (42), an insertion hole (411) is formed in the base body (41), the end portion of the guide rod (1) is movably inserted into the insertion hole (411), the first screw (42) is screwed on the base body (41), the end portion of the first screw (42) penetrates into the insertion hole (411), and the end portion of the first screw (42) is pressed against the circumferential surface of the guide rod (1).

4. A sliding door structure with guide rods according to claim 3, characterized in that: the base body (41) comprises a positioning seat (412), a positioning sleeve (413) and a second screw (414), wherein a sleeve convex part (415) is arranged on the positioning seat (412), an inner hole of the positioning sleeve (413) forms an insertion hole (411), one end of the positioning sleeve (413) is sleeved on the sleeve convex part (415), the first screw (42) and the second screw (414) are screwed on the positioning sleeve (413), the end part of the second screw (414) penetrates into the insertion hole (411), and the second screw (414) is pressed on the circumferential surface of the sleeve convex part (415).

5. A sliding door structure with guide rods according to claim 4, characterized in that: the positioning seat (412) is provided with a through waist-shaped hole (416).

6. A sliding door construction according to claim 5 with guide rods, wherein: the outer end face of the sleeving convex part (415) is provided with a hiding groove (417), and the waist-shaped hole (416) is positioned at the bottom of the hiding groove (417).

7. A sliding door structure with guide rods according to claim 4, characterized in that: the circumferential surface of the sleeving convex part (415) is provided with a limiting ring groove (418), and the end part of the second screw (414) is embedded in the limiting ring groove (418).

8. A sliding door structure with guide rods according to claim 5 or 6 or 7, characterized in that: the clamp is characterized by further comprising a clamp base (43) and a positioning screw (44), wherein a positioning convex column (431) is arranged on the clamp base (43), and a threaded end of the positioning screw (44) penetrates through the kidney-shaped hole (416) and then is screwed on the positioning convex column (431).

9. A sliding door structure with a guide bar according to claim 1, characterized in that: the upper positioning assembly (5) comprises a first film (51), a second film (52), a first clamping piece (53), a second clamping piece (54), a first positioning shaft (55) and a third screw (56), the first film (51) and the second film (52) are respectively attached to the inner surface and the outer surface of the sliding door leaf (2), the first clamping piece (53) and the second clamping piece (54) are respectively pressed on the outer surface of the first film (51) and the outer surface of the second film (52), the upper positioning roller (31) can be rotatably sleeved on the first positioning shaft (55), and the threaded end of the third screw (56) sequentially penetrates through the first clamping piece (53), the first film (51), the sliding door leaf (2), the second film (52) and the second clamping piece (54) and then is screwed on the first positioning shaft (55).

10. A sliding door structure with a guide bar according to claim 1, characterized in that: the lower positioning assembly (6) comprises a third film (61), a fourth film (62), a third clamping piece (63), a fourth clamping piece (64), a second positioning shaft (65) and a fourth screw (66), the third film (61) and the fourth film (62) are respectively attached to the inner surface and the outer surface of the sliding door leaf (2), the third clamping piece (63) and the fourth clamping piece (64) are respectively pressed on the outer surface of the third film (61) and the outer surface of the fourth film (62), the lower positioning roller (32) can be rotatably sleeved on the second positioning shaft (65), and the threaded end of the fourth screw (66) sequentially penetrates through the third clamping piece (63), the third film (61), the sliding door leaf (2), the fourth film (62) and the fourth clamping piece (64) and then is screwed on the second positioning shaft (65).

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