WO2018214136A1

WO2018214136A1 - Easy-to-install-and-dismantle door device

Info

Publication number: WO2018214136A1
Application number: PCT/CN2017/086042
Authority: WO
Inventors: Chen-Hsiang LEE
Original assignee: Lee Chen Hsiang
Priority date: 2017-05-26
Filing date: 2017-05-26
Publication date: 2018-11-29
Also published as: CN110945203A; CN110945203B

Abstract

An easy-to-install-and-dismantle door device and a bearing device (11) for a pivotal mechanism for the door device (11) are provided. The door device (11) includes a door frame (231) and a door (295) pivotably mounted to the door frame (231). A first pivotal mechanism (337) is mounted to the door (295) and includes a first axle (353) detachably coupled in a pivotal hole (253) of the door frame (231). A second pivotal mechanism (378) is detachably coupled to a support seat (277) of the door frame (231). At least one adjusting piece (294) can be added to adjust the height of the door (295). The second pivotal mechanism (378) includes a second axle (395) aligned with the first axle (353) in a vertical direction and a bearing device (413) for supporting the second axle (395).

Description

EASY-TO-INSTALL-AND-DISMANTLE DOOR DEVICE

BACKGROUND OF THE INVENTION

The present invention relates to a door device and, more particularly, to a door device permitting easy installation and easy dismantling.

A door installed in a passageway is pivotable between an open position and a closed position. Two hinges are generally mounted between the door and a door frame to support pivotal movement of the door. A typical hinge includes two plate-like engaging portions respectively screwed to the door and the door frame and, thus, requires drilling holes in the correct positions in the door and the door frame, which is not an easy task. Drilling holes in the incorrect positions result in inability or non-smoothness of pivotal movement between the open position and the closed position. Furthermore, installation and dismantling of the door for replacement or maintenance are inconvenient and time-consuming. Furthermore, the hinges are exposed between the door and the door frame and are, thus, apt to be rusted by water or be covered by dust, leading to non-smooth operation.

A type of folding door available in the market is of a suspension design including a track and a roller mechanism. The track includes an opening with a reduced width smaller than a width of the track. Thus, the roller mechanism cannot be disengaged directly via the opening. As a result, dismantling or installation of the folding door from or onto an inner side of the door frame requires dismantling or installation of the roller mechanism and the two hinges. Consequently, the conventional folding doors are difficult to dismantle and install.

BRIEF SUMMARY OF THE INVENTION

To permit easy installation and dismantling of doors, in a first aspect, the present invention provides

In a first aspect, an easy-to-install-and-dismantle door device includes a door frame having a horizontal frame mechanism extending in a transverse direction and a pivotal side frame fixed to an end of the horizontal frame mechanism. The horizontal frame mechanism includes a pivotal hole. A door is pivotably mounted to an inner side of the door frame. The door includes a pivotal side located adjacent to the pivotal side frame. The pivotal side includes a first end and a second end. The pivotal side further includes a limiting slot. A first pivotal mechanism is coupled to the first end of the pivotal side of the door. The first pivotal mechanism includes a spring and a first axle biased by the spring to an extended position. The first pivotal mechanism further includes a pin jointly movable with the first axle. A distal end of the pin is located outside of the first axle and is received in the limiting slot. The pin can be actuated to move the first axle along the limiting slot between the extended position and a retracted position. The first axle is detachably and pivotably mounted in the pivotal hole of the horizontal frame mechanism when the first axle is in the extended position. The first axle is disengaged from the pivotal hole when the first axle is in the retracted position. A support seat is fixed to the pivotal side frame of the door frame and is located adjacent to the second end of the pivotal side. The support seat includes a supporting portion. A second pivotal mechanism is mounted to the second end of the pivotal side of the door. The second pivotal mechanism includes a second axle detachably coupled to the supporting portion of the support seat. The second axle is aligned with the first axle in a vertical direction perpendicular to the transverse direction.

When the first axle is in the extended position and the second axle is coupled to the support seat, the door is pivotably mounted to the inner side of the door frame and is supported by the first axle and the second axle to be pivotable relative to the door frame between a closed position in which the door is substantially parallel to the horizontal frame mechanism and an open position in which the door is at a non-parallel angle to the horizontal frame mechanism.

When the first axle is in the retracted position, the second axle is detachable from the support seat and the door is detachable from the frame. When the door is in closed position, the limiting slot of the pivotal side is shielded by the pivotal side frame to prevent access to the pin, avoiding the first axle from moving from the extended position to the retracted position compressing the spring. When the door is in the open state, the limiting slot and the pin are exposed, and the pin is actuatable to move the first axle along the limiting slot from the extended position to the retracted position.

In an example, the door further includes a pivotal outer frame mounted to the pivotal side. The first end of the pivotal side is formed by a top end of the pivotal outer frame. The second end of the pivotal side is formed by a bottom end of the pivotal outer frame. The pivotal outer frame includes two side faces spaced from each other in the width direction and an end face between the two side faces. The limiting slot is formed at a middle of the end face and is located adjacent to the first end. The pin includes a pin hole. The distal end of the pin located outside of first axle and received in the limiting slot has an end face substantially flush with an outer surface of the pivotal outer frame or slightly radially inwards of an outer surface of the pivotal outer frame.

In an example, the first pivotal mechanism further includes a pivotal seat securely mounted in a mounting hole of the pivotal outer frame. The pivotal seat is jointly pivotable with the pivotal outer frame. The limiting groove intercommunicates with the mounting hole. The pivotal seat includes a sliding hole. The first axle includes a pivotal section detachably and pivotably coupled in the pivotal hole of the horizontal frame mechanism and a coupling section. The first axle further includes an enlarged section between the pivotal section and the coupling section. The first axle is slideably received in the sliding hole of the pivotal seat. A portion of the coupling section of the first axle is located outside of the pivotal seat and is coupled with the pin. The spring is received in the sliding hole and biases against the enlarged portion of the first axle.

In an example, the easy-to-install-and-dismantle door device further includes a roller mechanism. The door further includes a pivotal board and a movable board pivotably connected to the pivotal board. The pivotal board includes the pivotal side. The movable board includes a closure side spaced from the pivotal side. The horizontal frame mechanism includes a track extending in the transverse direction. The roller mechanism is mounted to the closure side of the movable board and includes a roller detachably mounted in the track. When the first axle is in the extended position, the roller is prevented from disengaging from the track. When the first axle is in the retracted positon, the roller is detachable from the track.

In an example, the horizontal frame mechanism includes an opening intercommunicating with the track. The opening has a width in a width direction perpendicular to the transverse direction and the vertical direction. The width of the opening is larger than or equal to a width of the track in the width direction. The roller has a diameter slightly smaller than the width of the opening in the width direction.

In an example, the roller includes an annular groove in an outer periphery of the roller and a ring mounted in the annular groove and made of soft material. The outer periphery of the roller is located between an outer periphery of the ring and an annular bottom wall of the annular groove in a radial direction. The outer periphery of the ring has an outer diameter slightly smaller than the width of the track in the width direction.

In an example, the easy-to-install-and-dismantle door device further includes a door closing positioning mechanism fixed to the pivotal board and including a positioning member biased by a second spring. The positioning member is movable between a first position engaged with the track and a second position disengaged from the track. When the door is in the closed position, the positioning member is in the first position, and the door is retained in the closed position. When the door pivots between the open position and the closed position, the positioning member is pressed by the horizontal frame mechanism and moves from the first position to the second position.

In an example, the easy-to-install-and-dismantle door device further includes at least one adjusting piece optionally mounted between the supporting portion of the support seat and the second axle. A spacing between the door and the track in the vertical direction is reduced in proportion to a number of the at least one adjusting piece.

In an example, the second pivotal mechanism further includes an axle sleeve fixed to the pivotal side of the door. The axle sleeve and the door are jointly pivotable. The axle sleeve includes a receptacle. The second axle includes an abutting section and a coupling section spaced from the abutting section in the vertical direction. The second axle is pivotably received in the receptacle of the axle sleeve. The coupling section is located outside of the axle sleeve and is detachably coupled with the supporting portion of the support seat. The second pivotal mechanism further includes a bearing device mounted in the receptacle of the axle sleeve. The abutting section of the second axle abuts against the bearing device. The bearing device supports the second axle to pivot relative to the axle sleeve. The second axle is located between the bearing device and the support seat.

In an example, the bearing device includes a casing mounted in the receptacle of the axle sleeve. The casing includes a chamber and a through-hole extending from a top end of the casing to the chamber. An annular positioning groove is defined in an inner periphery of the chamber. A plurality of balls is rollingly received in the chamber and surrounds the through-hole. A cap is rotatably received in the chamber. Each of the plurality of balls abuts the cap. A positioning ring is rotatably received in the chamber. The positioning ring is engaged in the annular positioning groove to position the cap. The second axle further includes a positioning section extending from the abutting section. The abutting section of the second axle abuts the positioning ring. The axle sleeve includes a through-hole aligned with the through-hole of the casing. The positioning section extends through the through-hole of the axle sleeve. The positioning section has a distal end located outside of the axle sleeve and engages with a retaining ring, preventing disengagement of the second axle from the axle sleeve and positioning the bearing device.

In a second aspect, a door device includes a door frame having a track extending in a transverse direction. A support seat is fixed to a side of the door frame. A door is pivotably mounted to an inner side of the door frame and is pivotable between an open position and a closed position. A first pivotal mechanism is coupled to the door and is pivotably connected to the door frame. A second pivotal mechanism is coupled to the door and is aligned with the first pivotal mechanism in a vertical direction perpendicular to the transverse direction. The second pivotal mechanism is coupled to the support seat. The first pivotal mechanism and the second pivotal mechanism support the door to pivot between the open position and the closed position. At least one adjusting piece is optionally mounted between the second pivotal mechanism and the support seat. A door closing positioning mechanism is fixed to the door and is jointly pivotable with the door. The door closing positioning mechanism includes a positioning member biased by a spring. The positioning member is movable between a first position engaged with the track and a second position disengaged from the track. The spring biases the positioning member to the first position.

When the door is in the closed position, the positioning member is in the first position engaged with the track, and the door is retained in the closed position. When the door pivots between the open position and the closed position, the positioning member is pressed by the door frame and moves from the first position to the second position. A spacing between the door and the track in the vertical direction is reduced in proportion to a number of the at least one adjusting pieces.

In an example, the positioning member includes an arcuate top face having a size larger than the track of the door frame. When the door is in the closed position, a portion of the arcuate top face of the positioning member engages with the track of the door frame. When the door pivots between the open position and the closed position, the door frame presses against the arcuate top face of the positioning member to move the positioning member from the first position to the second position.

In an example, the door closing positioning mechanism further includes a base fixed in the door and having a first end and a second end. The base further includes a first sliding hole extending from the first end towards but spaced from the second end of the base. The base further includes a second sliding hole extending from the first end to the first sliding hole and having an inner diameter smaller than an inner diameter of the first sliding hole. A stepped portion is formed at an intersection of the first sliding hole and the second sliding hole. A bottom cover is fixed to the base and seals the first sliding hole. A sliding sleeve is slideably received in the first sliding hole and the second sliding hole of the base. The sliding sleeve includes a first portion received in the first sliding hole and a second portion received in the second sliding hole. The sliding sleeve further includes a shoulder formed at an intersection of the first portion and the second portion. The second portion is coupled to and jointly movable with the positioning member. The spring is mounted between the sliding sleeve and the bottom cover. The shoulder cooperates the stepped portion to prevent the positioning member from disengaging from the base.

In an example, the door device further includes a roller mechanism. The door further includes a pivotal board and a movable board pivotably connected to the pivotal board. The pivotal board includes a pivotal side. The first pivotal mechanism and the second pivotal mechanism are coupled to the pivotal side. The movable board includes a closure side spaced from the pivotal side. The door closing positioning mechanism is mounted to the pivotal board and is located adjacent to a pivotal connection between the pivotal board and the movable board. The roller mechanism is mounted to the closure side of the movable board and includes a roller movably mounted in the track. When the door pivots between the open position and the closed position, the pivotal board and the movable board pivot relative to each other, and the roller moves along the track.

In a third aspect, a door device includes a door frame having a track extending in a transverse direction. A support seat is fixed to a side of the door frame. A door is pivotably connected to an inner side of the door frame and is pivotable relative to the door frame between an open position and a closed position. A first pivotal mechanism is coupled to the door and is pivotably connected to the door frame. A second pivotal mechanism is coupled to the door. The second pivotal mechanism includes an axle sleeve fixed to and jointly pivotable with the door. The axle sleeve includes a receptacle. The second pivotal mechanism further includes a second axle. The second axle includes an abutting section and a coupling section spaced from the abutting section in a vertical direction perpendicular to the transverse direction. The second axle is rotatably received in the receptacle. The coupling section is located outside of the axle sleeve and is coupled with the support seat. The second pivotal mechanism further includes a bearing device received in the receptacle of the axle sleeve. The second axle is located between the bearing device and the support seat. The abutting section of the second axle abuts the bearing device. The bearing device supports the second axle to pivot relative to the axle sleeve. The first pivotal mechanism and the second pivotal mechanism support the door to pivot relative to the door frame between the closed position and the open position.

In an example, the bearing device includes a casing mounted in the receptacle of the axle sleeve. The casing includes a chamber and a through-hole extending from a top end of the casing to the chamber. The casing further includes an annular positioning groove defined in an inner periphery of the chamber. A plurality of balls is rollingly received in the chamber and surrounds the through-hole. A cap is rotatably received in the chamber. Each of the plurality of balls abuts the cap. A positioning ring is rotatably received in the chamber. The positioning ring is engaged in the annular positioning groove to position the cap. The second axle further includes a positioning section extending from the abutting section. The abutting section of the second axle abuts against the positioning ring. The axle sleeve includes a through-hole aligned with the through-hole of the casing. The positioning section extends through the through-hole of the axle sleeve. The positioning section has a distal end located outside of the axle sleeve and engages with a retaining ring, preventing disengagement of the second axle and positioning the bearing device.

In an example, the door device further includes at least one adjusting piece optionally mounted between the second pivotal mechanism and the support seat. A spacing between the door and the track in the vertical direction is reduced in proportion to a number of the at least one adjusting pieces.

In an example, the support seat further includes a supporting portion extending from the mounting portion. The supporting portion includes a coupling hole engaged with the coupling section of the second axle. The at least one adjusting piece is optionally mounted in the coupling hole of the support seat. The coupling section of the second axle abuts against the at least one adjusting piece.

In a fourth aspect, a bearing device for a pivotal mechanism for a door device includes a casing adapted to be mounted in a receptacle of an axle sleeve. The receptacle is adapted to rotatably receive an axle having a positioning section. The casing includes a chamber and a through-hole extending from a top end of the casing to the chamber. The positioning section of the axle is adapted to extend through the through-hole of the casing. The casing further includes an annular positioning groove defined in an inner periphery of the chamber. A plurality of balls is rollingly received in the chamber and surrounds the through-hole. A cap is rotatably received in the chamber. Each of the plurality of balls abuts the cap. A positioning ring is rotatably received in the chamber. The positioning ring is engaged in the annular positioning groove to position the cap. The positioning ring is configured to abut against the axle to support rotation of the axle.

The present invention will become clearer in light of the following detailed description of illustrative embodiments of this invention described in connection with the drawings.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded, perspective view of an embodiment of an easy-to-install-and-dismantle door device according to the present invention.

FIG. 2is an exploded, perspective view of a first pivotal mechanism of the door device of FIG. 1.

FIG. 3 is an exploded, perspective view of a second pivotal mechanism of the door device of FIG. 1.

FIG. 4 is an exploded, perspective view of a roller mechanism of the door device of FIG. 1.

FIG. 5 is an exploded, perspective view of a door closing positioning mechanism of the door device of FIG. 1.

FIG. 6 is a perspective view of the door device of FIG. 1.

FIG. 7 is a front elevational view of the door device of FIG. 1

FIG. 8 is a cross sectional view taken along section line 8-8 of FIG. 6.

FIG. 9 is a cross sectional view taken along section line 9-9 of FIG. 7 with a positioning member of the door closing positioning mechanism in a first position.

FIG. 9A is a view similar to FIG. 9 with the positioning member of the door closing positioning mechanism moved to a second position.

FIG. 10 is a cross sectional view taken along section line 10-10 of FIG. 7.

FIG. 11 is a cross sectional view taken along section line 11-11 of FIG. 7.

FIG. 12 is a cross sectional view taken along section line 12-12 of FIG. 6.

FIG. 12A is a view similar to FIG. 12 with two adjusting pieces mounted between a second pivotal mechanism and a support seat.

FIG. 13 is a perspective view illustrating a door of the door device in an open position.

FIG. 13A is another perspective view illustrating the door of the door device in the open position.

FIG. 14 is a view similar to FIG. 11 with a first axle in a retracted position.

FIG. 15 is a cross sectional view similar to FIG. 12, illustrating tilting of the door for separation from a door frame.

FIG. 16 a perspective view similar to FIG. 13, illustrating tilting of the door for separation from the door frame.

All figures are drawn for ease of explanation of the basic teachings only； the extensions of the figures with respect to number, position, relationship, and dimensions of the parts to form the illustrative embodiments will be explained or will be within the skill of the art after the following teachings have been read and understood. Further, the exact dimensions and dimensional proportions to conform to specific force, weight, strength, and similar requirements will likewise be within the skill of the art after the following teachings have been read and understood.

Where used in the various figures of the drawings, the same numerals designate the same or similar parts. Furthermore, when the terms “first” , “second” , “lower” , “upper” , “top” , “bottom” , “side” , “end” , “portion” , “section” , “transverse” , “vertical” , “spacing” , “width” , “height” , and similar terms are used herein, it should be understood that these terms have reference only to the structure shown in the drawings as it would appear to a person viewing the drawings and are utilized only to facilitate describing the illustrative embodiments.

DETAILED DESCRIPTION OF THE INVENTION

A door device of an embodiment according to the present invention is shown in the drawings and generally designated 11. Door device 11 includes a door frame 231 having a horizontal frame mechanism 233. Door frame 231 further includes a pivotal side frame 257 fixed to an end of horizontal frame mechanism 233 and a closure side frame 275 fixed to the other end of horizontal frame mechanism 233 and spaced from pivotal side frame 257 in a transverse direction in which horizontal frame mechanism 233 extends, as shown in FIGS. 1 and 6. Each of pivotal side frame 257 and closure side frame 275 extends in a vertical direction perpendicular to the transverse direction. Horizontal frame mechanism 233 includes a track frame 235 and a pivotal seat 251 mounted to track frame 235. Track frame 235 includes a track 237 extending in the transverse direction and an opening 239 intercommunicating with track 237. A width of opening 239 in a width direction perpendicular to the transverse and vertical directions is larger or equal to the maximum width of track 237 in the width direction, as shown in FIGS. 1 and 4. Pivotal seat 251 is fixed in track 237 at a position adjacent to pivotal side frame 257 and includes a pivotal hole 253 in the form of a circular hole.

Pivotal side frame 257 includes an upper end 259 and a lower end 271 spaced from upper end 259 in the vertical direction. Pivotal side frame 257 further includes a receiving groove 273 extending from upper end 259 through lower end 271 in the vertical direction. Upper end 259 of pivotal side frame 257 is coupled to track frame 235.

Door frame 231 further includes a support seat 277 fixed to lower end 271 of pivotal side frame 257. Support seat 277 includes a mounting portion 279 and a supporting portion 291 extending from mounting portion 277 in the transverse direction. Supporting portion 291 includes a coupling hole 293 having non-circular cross sections. Mounting portion 279 is mounted in receiving groove 273 of pivotal side frame 257 and is fixed by screws. Supporting portion 291 is located outside of pivotal side frame 257 and is located between pivotal side frame 257 and closure side frame 275, as shown in FIGS. 6 and 7.

Door 11 further includes a door 295 pivotably mounted to an inner side of door frame 231. Door 295 includes a pivotal side 299 adjacent to pivotal side frame 257 and a closure side 336 spaced from pivotal side 299 in the transverse direction (see FIG. 1) . Pivotal side 299 includes a pivotal outer frame 313. Closure side 336 includes a closure outer frame 338. Pivotal outer frame 313 includes a first end 315 and a second end 317 spaced from first end 315 in the vertical direction. Pivotal outer frame 313 further includes a mounting hole 331 extending from first end 315 through second end 317 in the vertical direction. Pivotal outer frame 313 further includes a limiting slot 319 extending from an outer periphery of pivotal outer frame 313 to mounting hole 331. Pivotal outer frame 313 includes two side faces 313A spaced from each other in the width direction and an end face 313B (in the form of a semi-circular face) between side faces 313A. Limiting slot 319 is defined in a central portion of end face 313B and is located adjacent to first end 315. Namely, limiting slot 319 has an equal spacing to side faces 313A in the width direction. Closure outer frame 338 includes a mounting space 340 extending in the vertical direction.

Door 295 further includes a pivotal board 297 having a first inner end 311 and a compartment 297A in a top end of pivotal board 297. Pivotal side 299 and pivotal outer frame 311 are located on pivotal board 297 and are spaced from first inner end 311 in the transverse direction. Door 295 further includes a movable board 333 pivotably connected to pivotal board 297. Movable board 333 includes a second inner end 335. Closure side 336 and closure outer frame 338 are located on movable board 333 and are spaced from second inner end 335 in the transverse direction. Namely, first inner end 311 of pivotal board 297 is located between pivotal side 299 and second inner end 335. Second inner end 335 of movable board 333 is located between first inner end 331 and closure side 336.

Door 295 further includes a hinge mechanism 14 pivotably connected to pivotable board 297 and movable board 333, as shown in FIG. 1. Hinge mechanism 14 includes a first side frame 173 coupled to second inner end 335 of movable board 333 and a second side frame 176 coupled to first inner end 311 of pivotal board 297. Hinge mechanism 14 further includes a pivotal frame 168 pivotably connected to first side frame 173 and second side frame 176. Thus, hinge mechanism 14 supports relative pivotal movement between pivotal board 297 and movable board 333 (see FIGS. 6 and 13) .

Door device 11 further includes a door lock 12 mounted to movable board 333. Door lock 12 includes a latch 68 and a knob 157 operatively connected to latch 68. When knob 157 is pivoted, latch 68 is moved between a latching position (see FIGS. 7 and 8) engaged with track 237 of track frame 235 and an unlatching position (see FIGS. 1, 13, and 16) disengaged from track frame 235.

With reference to FIGS. 1 and 2, door device 11 further includes a first pivotal mechanism 337 coupled to first end 315 of pivotal side 299. First pivotal mechanism 337 includes a pivotal seat 339 having a sliding hole 351. First pivotal mechanism 337 further includes a first axle 353 biased by a spring 377 to an extended position (see FIGS. 8 and 11) . First axle 353 includes a pivotal section 355 pivotably connected to pivotal hole 253 of horizontal frame mechanism 233 and a coupling section 357. First axle 353 further includes an enlarged section 359 between pivotal section 355 and coupling section 357. Coupling section 357 includes a fixing hole 371 for coupling with a pin 373. A portion of pin 373 is located outside of first axle 353 and includes a pin hole 375 for detachably coupling with a tool. First axle 353 is slideably received in sliding hole 351 of pivotal seat 339. A portion of coupling section 357 is located outside of pivotal seat 339. Pin 373 is located outside of pivotal seat 339 (see FIGS. 8 and 11) . Spring 377 is received in sliding hole 351 and biases enlarged section 359 of first axle 353, thereby biasing first axle 353 to the extended position. When first axle 353 is in the extended position, pivotal section 355 of first axle 353 is located outside of pivotal seat 339.

Pivotal seat 339 of first pivotal mechanism 337 is fixed in mounting hole 331 of pivotal outer frame 313. Pivotal section 355 of first axle 353 in the extended position is located outside of pivotal outer frame 313. A distal end of pin 373 located outside of first axle 353 is received in limiting slot 319 and has an end face that is substantially flush with an outer surface of pivotal outer frame 313 or slightly radially inwards of the outer surface of pivotal outer frame 313. An elongated tool can be coupled with the pin hole 375 of pin 373. The elongated tool can be operated to push first axle 353 to compress against spring 377, moving first axle 353 from the extended positon to a retracted position (see FIG. 14) .

Door device 11 further includes a second pivotal mechanism 378 pivotably connected to second end 317 of pivotal outer frame 313 of pivotal side 299 of door 295. Second pivotal mechanism 378 includes an axle sleeve 379 having a receptacle 391 and a through-hole 393 extending from a top face of axle sleeve 379 to receptacle 391 and having a diameter smaller than a diameter of receptacle 391. Second pivotal mechanism 378 includes a second axle 395 detachably coupled to supporting portion 291 of support seat 277. Second axl3 395 includes an abutting section 411 and a coupling section 397 spaced from abutting section 411 in the vertical direction. Second axle 395 further includes a positioning section 399 extending from abutting section 411. Coupling section 397 has cross sections identical to cross sections of coupling hole 293 of supporting seat 277. Second axle 395 is rotatably received in receptacle 391 of axle sleeve 379. Coupling section 397 is located outside of axle sleeve 379. A distal end of positioning section 399 extends through through-hole 393 of axle sleeve 379 to a position beyond axle sleeve 379 and is coupled with a retaining ring. Thus, second axle 395 cannot disengage from axle sleeve 379 in the vertical direction.

Second pivotal mechanism 378 further includes a bearing device 413, such as a ball bearing. Bearing device 413 includes a casing 415 having a chamber 417 and a through-hole 431 extending from a top face of casing 415 to chamber 417 and aligned with through-hole 393 of axle sleeve 379. Casing 415 further includes an annular positioning groove 419 defined in an inner periphery of chamber 417. Bearing device 413 further includes a plurality of balls 433 rollingly received in chamber 417 of casing 415 and surrounding through-hole 431. Bearing device 413 further includes a cap 435 and a positioning ring 437. Cap 435 is rotatably received in chamber 417 of casing 415 and abuts each ball 433. Positioning ring 437 is rotatably received in chamber 417 of casing 415 and is coupled in annular positioning groove 419 to position cap 435.

Bearing device 413 is mounted in receptacle 391 of axle sleeve 379. Abutting section 411 of second axle 395 abuts positioning ring 437. Positioning section 399 of second axle 395 extends through through-hole 431 of casing 415 (see FIG. 12) .

Axle sleeve 379 of second pivotal mechanism 378 is received in mounting hole 331 and is located at second end 317 of pivotal outer frame 313. Thus, second axle 395 is aligned with first axle 353 in the vertical direction. Furthermore, door 295 is supported and pivotably mounted by first pivotal mechanism 337 and second pivotal mechanism 378 to the inner side of door frame 231. Specifically, pivotal section 355 of first axle 353 of first pivotal mechanism 337 is detachably and pivotably mounted in pivotal hole 253 of track 237. Coupling section 397 of second axle 395 of second pivotal mechanism 378 is detachably mounted in coupling hole 293 of support seat 277. Furthermore, a bottom end of coupling section 397 of second axle 395 abuts a bottom of coupling hole 293 of support seat 277. Thus, second axle 395 cannot pivot due to restriction by support seat 277. Furthermore, the bottom end of axle sleeve 379 is spaced from supporting portion 291 of support seat 277 in the vertical direction (see FIG. 12) . Thus, bearing device 413 supports axle sleeve 379 to pivot relative to second axle 395. As a result, first pivotal mechanism 337 and second pivotal mechanism 378 support pivotal board 297 of door 295 to pivot between a closed position (FIGS. 6 and 7) parallel to horizontal frame mechanism 233 and an open position (FIG. 13) at a non-parallel angle to horizontal frame mechanism 233.

With reference to FIGS. 4, 8, and 10, door device 11 further includes a roller mechanism 439 mounted to closure outer frame 338 of closure side 336 of movable board 333. Roller mechanism 439 includes a roller seat 451 mounted in mounting space 340 of closure outer frame 338. Roller seat 451 includes an engaging hole 453 and is fixed in mounting space 340 of closure outer frame 338 by screws. Roller mechanism 439 further includes an axle 455 non-rotatably mounted in engaging hole 453. Axle 455 includes a first section 457 coupled with engaging hole 453 and a second section 459. Axle 455 further includes a flange 471 formed between first section 457 and second section 459.

Roller mechanism 439 further includes a roller 475 rotatably coupled to second section 459 of axle 455. Roller 475 includes two annular grooves 479 defined in an outer periphery of roller 475. Two rings 491 are respectively mounted in the two annular grooves 479 and are made of soft material. The outer periphery of roller 475 is located between an annular outer face of each ring 491 and an annular bottom wall of each annular groove 479 in a radial direction (see FIG. 10) . Roller 475 includes a room 477 receiving a roller bearing 473, such as a needle roller bearing. Roller bearing 473 is rotatably mounted around second section 459 of axle 455. Furthermore, roller bearing 473 abuts flange 471 to support relative rotation of roller 475 and axle 455.

Roller 475 is removably received in track 237 of track frame 235. The outer periphery of each ring 491 is slightly smaller than the width of the track 237. Thus, when door 295 pivots between the open position and the closed position, roller 475 rolls along track 237 of track frame 235 along a rectilinear path. Thus, closure side 336 of movable board 333 of door 295 is limited to move along the rectilinear path defined in the track 237 of track frame 235. Each ring 491 made of soft material permits soundless and smooth rolling of roller 475.

Door device 411 further includes a door closing positioning mechanism 492 having a base 493. Base 493 includes a first end and a second end spaced from the first end in the vertical direction. Base 493 further includes a first sliding hole 495 extending from the first end towards but spaced from the second end of base 493. Base 493 further includes a second sliding hole 497 extends from the second end to first sliding hole 495 and having an inner diameter smaller than an inner diameter of first sliding hole 495, forming a stepped portion 499 at an intersection of first sliding hole 495 and second sliding hole 497. Door closing positioning mechanism 492 further includes a bottom cover 531 fixed to base 493 and sealing first sliding hole 495. Door closing positioning mechanism 492 further includes a sliding sleeve 511 slideably received in first sliding hole 495 and second sliding hole 497. Sliding sleeve 511 includes a first portion 513 received in first sliding hole 495 and a second portion 515 received in second sliding hole 497. Sliding sleeve 511 further includes a shoulder 517 formed at an intersection of first portion 513 and second portion 515. Door closing positioning mechanism 492 further includes a positioning member 533 moving jointly with sliding sleeve 511. Positioning member 533 includes an arcuate top face 535 having a size larger than track 237.

Positioning member 533 is coupled to second portion 515 of sliding sleeve 511 and is located outside of base 493. A spring 519 is mounted between sliding sleeve 511 and bottom cover 531 and biases sliding sleeve 511. Shoulder 517 cooperates stepped portion 499 to prevent positioning member 533 from disengaging from base 493.

Base 493 of door closing positioning mechanism 492 is received in compartment 297A of pivotal board 297. Positioning member 533 is located outside of pivotal board 297 and is movable relative to pivotal board 297 between a first position engaged with track 237 and a second position disengaged from track 237. Spring 519 biases sliding sleeve 511 and, thus, biases positioning member 533 to the first position.

For ease of explanation, it will be assumed that door 295 is in the closed position substantially parallel to horizontal frame mechanism 233. Pivotal board 297 and movable board 333 are in a straight line. Closure outer frame 338 abuts closure side frame 275 (see FIGS. 6 and 7) . Positioning member 533 of door closing positioning mechanism 492 is in the first position engaged with track 237. In this case, door 295 remains in the closed position even if latch 68 is in the unlatching position.

FIG. 8 shows that positioning member 533 of door closing positioning mechanism 492 is in the first position engaged with track 237 and latch 68 is in the latching position to retain door 295 in the closed position, avoiding door 295 from moving from the closed position to the open position.

After operating knob 157 to move latch 68 from the latching position to the unlatching position, door 295 is permitted to move from the closed position to the open position. During pivotal movement of door 295 from the closed position to the open position, arcuate top face 535 of positioning member 533 of door closing positioning mechanism 492 is pressed by track frame 235 to move from the first position (FIG. 9) to the second position (FIG. 9A) disengaged from track 237. Then, pivotal board 297 and movable board 333 pivot relative to each other, and roller 475 of roller mechanism 439 rolls along track 237 until door 295 reaches the open position. When door 295 is in the open position, pivotal board 297 and movable board 333 have an acute angle therebetween.

In a case that door frame 231 is mounted in a higher passageway in a building, the spacing between door closing positioning mechanism 492 and track frame 235 could be too large for positioning member 533 in the first position to engage with track 237. In this case, one or more adjusting pieces 294 can be mounted between second pivotal mechanism 378 and support seat 277. The volume of each adjusting piece 294 is slightly smaller than coupling hole 293 of support seat 277. The number of adjusting pieces 294 depends on the spacing between positioning member 533 and track 237. With reference to FIG. 12A, specifically, a desired number of adjusting pieces 294 can be placed in coupling hole 293 of support seat 277, such that coupling section 397 of second axle 395 abuts the adjusting pieces 294. Thus, second pivotal mechanism 378 is raised. In addition, the whole door 295, first pivotal mechanism 337, door closing positioning mechanism 492, and roller mechanism 439 are also raised. As a result, positioning member 533 of door closing positioning mechanism 492 is moved near track frame 235, and positioning member 533 in the first position can engage with track 237 of track frame 235.

The pivotal connection between door 295 and door frame 231 is achieved by first axle 353 and pivotal hole 253 of horizontal frame mechanism 233. When first axle 353 is detached from pivotal hole 253, door 295 can be rapidly dismantled from door frame 231. Specifically, as shown in FIG. 7, when door 295 is in the closed position, limiting slot 319 of pivotal outer frame 313 is shielded by pivotal side frame 257 to prevent access to pin 373. Thus, a user cannot use a tool to move first axle 353 of first pivotal mechanism 337 from the extended position to the retracted position. As a result, door 295 in the closed position cannot be easily detached, increasing the anti-burglar effect of door device 11.

When door 295 is in the open position shown in FIGS. 13 and 13A, limiting slot 319 and pin 373 are exposed (not shielded by pivotal side frame 257) , such that the user can couple a tool with pin hole 375 and can then apply a force on the tool to move first axle 353 from the extended position engaged with pivotal hole 253 (FIG. 11) to the retracted position disengaged from pivotal hole 253 (FIG. 14) . Next, door 295 can be tilted along track 237 (FIGS. 15 and 16) to disengage roller 475 of roller mechanism 439 and positioning member 533 of door closing positioning mechanism 492 from track 237. Finally, door 295 can be lifted to disengage coupling section 397 of second axle 395 of second pivotal mechanism 378 from coupling hole 293 of support seat 277. Thus, door 295 can be quickly separated from door frame 231.

On the other hand, when it is desired to pivotally connect door 295 with door frame 231, pivotal board 297 and movable board 333 are pivoted to have an acute angle therebetween, and the tool is used to move first axle 353 to the retracted position. Next, door 295 is tilted, and coupling section 397 of second axle 395 of second pivotal mechanism 378 is engaged with coupling hole 293 of support seat 277. Then, door 295 is moved to an upright position to align first axle 353 of first pivotal mechanism 337 with pivotal hole 253 of track frame 235 and to place roller 475 into track 237 of track frame 235. Furthermore, positioning member 533 is engaged with track 237. Finally, first axle 353 is released, spring 377 biases first axle 353 to the extended position, and pivotal section 355 is engaged with pivotal hole 253 of track frame 235. Thus, door 295 is pivotally connected to the inner side of door frame 231 and can pivot between the open position and the closed position (see FIGS. 6 and 13) .

By providing first pivotal mechanism 378 having first axle 353 movable between the extended position and the retracted position for releasably engaging with pivotal hole 253 of horizontal frame mechanism 233 and by providing detachable engagement between second pivotal mechanism 378 and support seat 277, easy and rapid installation and dismantling of door 295 can be achieved.

Limiting slot 319 of pivotal outer frame 313 of door 295 is located on end face 313B of pivotal outer frame 313 (preferably at a middle of end face 313B) . Thus, when door 295 is in the closed position, limiting slot 319 is shielded by pivotal side frame 257 and can be exposed only when door 295 is in the open position, permitting subsequent dismantling of door 295 from door frame 231 by moving first axle 353 with a tool. Thus, door 295 can be easily dismantled while providing the anti-burglar effect. The easy-to-dismantle door 295 is advantageous to maintenance, repair, and replacement.

Furthermore, since limiting slot 319 is located on end face 313B between two side faces 313A of pivotal outer frame 313 and is located adjacent to first end 315, door device 11 can be installed as a left-handed door or a right-handed door without changing pivotal outer frame 313. Thus, the costs for inventory and manufacture for the manufacturer can be reduced.

When door 295 is in the closed position, provision of door closing positioning mechanism 492 still retains door 295 in the closed position even if latch 68 is moved to the unlatching position, increasing the utility and use convenience of door device 11.

Second pivotal mechanism 378 uses second axle 395 abutting bearing device 413, such that the weight of door 295 can be withstood by bearing device 413 made of metal, reducing the damage risk of second pivotal mechanism 378.

Furthermore, since second axle 395 of second pivotal mechanism 378 is located between bearing device 413 and supporting portion 291 of support seat 277 and since bearing device 413 is received in receptacle 391 of axle sleeve 379, water or dust that would adversely affect operation of bearing device 413 is less likely to pass through receptacle 391 of axle sleeve 379, to move upward across second axle 395, and to reach bearing device 413. Thus, the durability of bearing device 413 is increased.

The two rings 491 made of soft material assist in smooth rolling of roller 475 in track 237, reducing the rolling noise and providing more smooth rolling of roller 475.

Adjusting pieces 294 can be optionally added into between second pivotal mechanism 378 and support seat 277 according to the need on the installation site. Thus, the height of door 295 can be rapidly and finely adjusted to locate positioning member 533 of door closing positioning mechanism 492 in the correct position for engagement with track 237 when door 295 is in the closed position. Thus, adjusting pieces 294 are advantageous to rapid installation and adjustment of door 295.

Now that the basic teachings of the present invention have been explained, many extensions and variations will be obvious to one having ordinary skill in the art. For example, door 295 can be of a single piece without the folding function. In this case, door 295 does not have to include roller 439 and door closing positioning mechanism 492. Alternatively, coupling section 397 of second axle 395 of second pivotal mechanism 378 and coupling hole 293 of support seat 277 can have circular cross sections without adversely affecting operation of second pivotal mechanism 378. Furthermore, roller 475 can include only one annular groove 479 and only one ring 491.

Thus since the illustrative embodiments disclosed herein may be embodied in other specific forms without departing from the spirit or general characteristics thereof, some of which forms have been indicated, the embodiments described herein are to be considered in all respects illustrative and not restrictive. The scope is to be indicated by the appended claims, rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Claims

An easy-to-install-and-dismantle door device comprising:

a door frame (231) including a horizontal frame mechanism (233) extending in a transverse direction and a pivotal side frame (257) fixed to an end of the horizontal frame mechanism (233) , with the horizontal frame mechanism (233) including a pivotal hole (253) ；

a door (295) pivotably mounted to an inner side of the door frame (231) , with the door (295) including a pivotal side (299) located adjacent to the pivotal side frame (257) , with the pivotal side (299) including a first end (315) and a second end (317) , with the pivotal side (299) further including a limiting slot (319) ；

a first pivotal mechanism (337) coupled to the first end (315) of the pivotal side (299) of the door (295) , with the first pivotal mechanism (337) including a spring (337) and a first axle (353) biased by the spring (337) to an extended position, with the first pivotal mechanism (337) further including a pin (373) jointly movable with the first axle (353) , with a distal end of the pin (373) located outside of the first axle (353) and received in the limiting slot (319) , with the pin (373) actuatable to move the first axle (353) along the limiting slot (319) between the extended position and a retracted position, wherein the first axle (353) is detachably and pivotably mounted in the pivotal hole (253) of the horizontal frame mechanism (233) when the first axle (353) is in the extended position, and wherein the first axle (353) is disengaged from the pivotal hole (253) when the first axle (353) is in the retracted position；

a support seat (277) fixed to the pivotal side frame (257) of the door frame (231) and located adjacent to the second end (317) of the pivotal side (299) , with the support seat (277) including a supporting portion (291) ； and

a second pivotal mechanism (378) mounted to the second end (317) of the pivotal side (299) of the door (295) , with the second pivotal mechanism (378) including a second axle (395) detachably coupled to the supporting portion (291) of the support seat (277) , with the second axle (395) aligned with the first axle (353) in a vertical direction perpendicular to the transverse direction,

with the first axle (353) in the extended position and with the second axle (395) coupled to the support seat (277) , the door (295) is pivotably mounted to the inner side of the door frame (231) and is supported by the first axle (353) and the second axle (395) to be pivotable relative to the door frame (231) between a closed position in which the door (295) is substantially parallel to the horizontal frame mechanism (233) and an open position in which the door (295) is at a non-parallel angle to the horizontal frame mechanism (233) ,

wherein when the first axle (353) is in the retracted position, the second axle (395) is detachable from the support seat (277) and the door (295) is detachable from the frame (231) ,

wherein when the door (295) is in closed position, the limiting slot (319) of the pivotal side (299) is shielded by the pivotal side frame (257) to prevent access to the pin (373) , avoiding the first axle (353) from moving from the extended position to the retracted position compressing the spring (377) , and

wherein when the door (295) is in the open state, the limiting slot (319) and the pin (373) are exposed, and the pin (373) is actuatable to move the first axle (353) along the limiting slot (319) from the extended position to the retracted position.
The easy-to-install-and-dismantle door device as claimed in claim 1, wherein the door (295) further includes a pivotal outer frame (313) mounted to the pivotal side (299) , wherein the first end (315) of the pivotal side (299) is formed by a top end of the pivotal outer frame (315) , wherein the second end (317) of the pivotal side (299) is formed by a bottom end of the pivotal outer frame (315) , wherein the pivotal outer frame (313) includes two side faces (313A) spaced from each other in the width direction and an end face (313B) between the two side faces (313A) , wherein the limiting slot (319) is formed at a middle of the end face (313B) and is located adjacent to the first end (315) , wherein the pin (373) includes a pin hole (375) , wherein the distal end of the pin (373) located outside of first axle (353) and received in the limiting slot (319) has an end face substantially flush with an outer surface of the pivotal outer frame (313) or slightly radially inwards of an outer surface of the pivotal outer frame (313) .
The easy-to-install-and-dismantle door device as claimed in claim 2, wherein the first pivotal mechanism (337) further includes:

a pivotal seat (339) securely mounted in a mounting hole (331) of the pivotal outer frame (313) , wherein the pivotal seat (339) is jointly pivotable with the pivotal outer frame (313) , wherein the limiting groove (319) intercommunicates with the mounting hole (331) , wherein the pivotal seat (339) includes a sliding hole (351) , wherein the first axle (353) includes a pivotal section (355) detachably and pivotably coupled in the pivotal hole (253) of the horizontal frame mechanism (233) and a coupling section (357) , wherein the first axle (353) further includes an enlarged section (359) between the pivotal section (355) and the coupling section (357) , wherein the first axle (353) is slideably received in the sliding hole (351) of the pivotal seat (339) , wherein a portion of the coupling section (357) of the first axle (353) is located outside of the pivotal seat (339) and is coupled with the pin (373) , wherein the spring (377) is received in the sliding hole (351) and biases against the enlarged portion (359) of the first axle (353) .
The easy-to-install-and-dismantle door device as claimed in claim 1, further comprising: a roller mechanism (439) ,

wherein the door (295) further includes a pivotal board (297) and a movable board (333) pivotably connected to the pivotal board (297) , wherein the pivotal board (297) includes the pivotal side (299) , wherein the movable board (333) includes a closure side (336) spaced from the pivotal side (299) , wherein the horizontal frame mechanism (233) includes a track (237) extending in the transverse direction, wherein the roller mechanism (439) is mounted to the closure side (336) of the movable board (333) and includes a roller (475) detachably mounted in the track (237) ,

wherein when the first axle (353) is in the extended position, the roller (475) is prevented from disengaging from the track (237) , and

wherein when the first axle (353) is in the retracted positon, the roller (475) is detachable from the track (237) .
The easy-to-install-and-dismantle door device as claimed in claim 4, wherein the horizontal frame mechanism (233) includes an opening (239) intercommunicating with the track (237) , wherein the opening (239) has a width in a width direction perpendicular to the transverse direction and the vertical direction, wherein the width of the opening (239) is larger than or equal to a width of the track (237) in the width direction, wherein the roller (475) has a diameter slightly smaller than the width of the opening (239) in the width direction.
The easy-to-install-and-dismantle door device as claimed in claim 4, wherein the roller (475) includes an annular groove (479) in an outer periphery of the roller (475) and a ring (491) mounted in the annular groove (479) and made of soft material, wherein the outer periphery of the roller (475) is located between an outer periphery of the ring (491) and an annular bottom wall of the annular groove (479) in a radial direction, wherein the outer periphery of the ring (491) has an outer diameter slightly smaller than the width of the track (237) in the width direction.
The easy-to-install-and-dismantle door device as claimed in claim 4, further comprising:

a door closing positioning mechanism (492) fixed to the pivotal board (297) and including a positioning member (533) biased by a second spring (519) , wherein the positioning member (533) is movable between a first position engaged with the track (237) and a second position disengaged from the track (237) ,

wherein when the door (295) is in the closed position, the positioning member (533) is in the first position, and the door (295) is retained in the closed position, and

wherein when the door (295) pivots between the open position and the closed position, the positioning member (533) is pressed by the horizontal frame mechanism (233) and moves from the first position to the second position.
The easy-to-install-and-dismantle door device as claimed in claim 7, further comprising:

at least one adjusting piece (294) optionally mounted between the supporting portion (291) of the support seat (277) and the second axle (395) , wherein a spacing between the door (295) and the track (237) in the vertical direction is reduced in proportion to a number of the at least one adjusting piece (294) .
The easy-to-install-and-dismantle door device as claimed in claim 1, wherein the second pivotal mechanism (378) further includes:

an axle sleeve (379) fixed to the pivotal side (299) of the door (295) , wherein the axle sleeve (379) and the door (295) are jointly pivotable, wherein the axle sleeve (379) includes a receptacle (391) , wherein the second axle (395) includes an abutting section (411) and a coupling section (397) spaced from the abutting section (411) in the vertical direction, wherein the second axle (395) is pivotably received in the receptacle (391) of the axle sleeve (379) , wherein the coupling section (397) is located outside of the axle sleeve (379) and is detachably coupled with the supporting portion (291) of the support seat (277) , and

a bearing device (413) mounted in the receptacle (391) of the axle sleeve (379) , wherein the abutting section (411) of the second axle (395) abuts against the bearing device (413) , wherein the bearing device (413) supports the second axle (395) to pivot relative to the axle sleeve (379) , wherein the second axle (395) is located between the bearing device (413) and the support seat (277) .
The easy-to-install-and-dismantle door device as claimed in claim 9, wherein the bearing device (413) includes:

a casing (415) mounted in the receptacle (391) of the axle sleeve (379) , wherein the casing (415) includes a chamber (417) and a through-hole (431) extending from a top end of the casing (415) to the chamber (417) , wherein the casing (415) further includes an annular positioning groove (419) defined in an inner periphery of the chamber (417) ,

a plurality of balls (433) rollingly received in the chamber (417) and surrounding the through-hole (431) ,

a cap (435) rotatably received in the chamber (417) , wherein each of the plurality of balls (433) abuts the cap (435) , and

a positioning ring (437) rotatably received in the chamber (417) , wherein the positioning ring (437) is engaged in the annular positioning groove (419) to position the cap (435) ,

wherein the second axle (395) further includes a positioning section (399) extending from the abutting section (411) , wherein the abutting section (411) of the second axle (395) abuts the positioning ring (437) ,

wherein the axle sleeve (379) includes a through-hole (393) aligned with the through-hole (431) of the casing (415) , wherein the positioning section (399) extends through the through-hole (393) of the axle sleeve (379) , wherein the positioning section (399) has a distal end located outside of the axle sleeve (379) and engages with a retaining ring, preventing disengagement of the second axle (395) from the axle sleeve (379) and positioning the bearing device (413) .
A door device comprising:

a door frame (231) including a track (237) extending in a transverse direction；

a support seat (277) fixed to a side of the door frame (231) ；

a door (295) pivotably mounted to an inner side of the door frame (231) and pivotable between an open position and a closed position；

a first pivotal mechanism (337) coupled to the door (295) and pivotably connected to the door frame (231) ；

a second pivotal mechanism (378) coupled to the door (295) and aligned with the first pivotal mechanism (337) in a vertical direction perpendicular to the transverse direction, wherein the second pivotal mechanism (378) coupled to the support seat (277) , wherein the first pivotal mechanism (337) and the second pivotal mechanism (378) support the door (295) to pivot between the open position and the closed position；

at least one adjusting piece (294) optionally mounted between the second pivotal mechanism (378) and the support seat (277) ； and

a door closing positioning mechanism (492) fixed to the door (295) and jointly pivotable with the door (295) , with the door closing positioning mechanism (492) including a positioning member (533) biased by a spring (519) , with the positioning member (533) movable between a first position engaged with the track (237) and a second position disengaged from the track (237) , wherein the spring (519) biases the positioning member (533) to the first position,

wherein when the door (295) is in the closed position, the positioning member (533) is in the first position engaged with the track (237) , and the door (295) is retained in the closed position,

wherein when the door (295) pivots between the open position and the closed position, the positioning member (533) is pressed by the door frame (231) and moves from the first position to the second position.

wherein a spacing between the door (295) and the track (237) in the vertical direction is reduced in proportion to a number of the at least one adjusting pieces (294) .
The door device as claimed in claim 11, wherein the positioning member (533) includes an arcuate top face (535) having a size larger than the track (237) of the door frame (231) ,

wherein when the door (295) is in the closed position, a portion of the arcuate top face (535) of the positioning member (533) engages with the track (237) of the door frame (231) , and

wherein when the door (295) pivots between the open position and the closed position, the door frame (231) presses against the arcuate top face (535) of the positioning member (533) to move the positioning member (533) from the first position to the second position.
The door device as claimed in claim 11, wherein the door closing positioning mechanism (492) further includes:

a base (493) fixed in the door (295) and including a first end and a second end, with the base (493) further including a first sliding hole (495) extending from the first end towards but spaced from the second end of the base (493) , with the base (493) further including a second sliding hole (497) extending from the first end to the first sliding hole (495) and having an inner diameter smaller than an inner diameter of the first sliding hole (495) , with a stepped portion (499) formed at an intersection of the first sliding hole (495) and the second sliding hole (497) ,

a bottom cover (531) fixed to the base (493) and sealing the first sliding hole (495) , and

a sliding sleeve (511) slideably received in the first sliding hole (495) and the second sliding hole (497) of the base (493) , with the sliding sleeve (511) including a first portion (513) received in the first sliding hole (495) and a second portion (515) received in the second sliding hole (497) , with the sliding sleeve (511) further including a shoulder (517) formed at an intersection of the first portion (513) and the second portion (515) , with the second portion (515) coupled to and jointly movable with the positioning member (533) , with the spring (519) mounted between the sliding sleeve (511) and the bottom cover (531) , with the shoulder (517) cooperating the stepped portion (499) to prevent the positioning member (533) from disengaging from the base (493) .
The door device as claimed in claim 11, further comprising: a roller mechanism (439) ,

wherein the door (295) further includes a pivotal board (297) and a movable board (333) pivotably connected to the pivotal board (297) , wherein the pivotal board (297) includes a pivotal side (299) , wherein the first pivotal mechanism (337) and the second pivotal mechanism (378) are coupled to the pivotal side (299) , wherein the movable board (333) includes a closure side (336) spaced from the pivotal side (299) , wherein the door closing positioning mechanism (492) is mounted to the pivotal board (297) and is located adjacent to a pivotal connection between the pivotal board (297) and the movable board (333) ,

wherein the roller mechanism (439) is mounted to the closure side (336) of the movable board (333) and includes a roller (475) movably mounted in the track (237) ,

wherein when the door (295) pivots between the open position and the closed position, the pivotal board (297) and the movable board (333) pivot relative to each other, and the roller (475) moves along the track (237) .
A door device comprising:

a door frame (231) including a track (237) extending in a transverse direction；

a support seat (277) fixed to a side of the door frame (231) ；

a door (295) pivotably connected to an inner side of the door frame (231) and pivotable relative to the door frame (231) between an open position and a closed position；

a first pivotal mechanism (337) coupled to the door (295) and pivotably connected to the door frame (231) ；

a second pivotal mechanism (378) coupled to the door (295) , with the second pivotal mechanism (378) including an axle sleeve (379) fixed to and jointly pivotable with the door (295) , with the axle sleeve (379) including a receptacle (391) , with the second pivotal mechanism (378) further including a second axle (395) , with the second axle (395) including an abutting section (411) and a coupling section (397) spaced from the abutting section (411) in a vertical direction perpendicular to the transverse direction, with the second axle (395) rotatably received in the receptacle (391) , with the coupling section (397) located outside of the axle sleeve (379) and coupled with the support seat (277) , with the second pivotal mechanism (378) further including a bearing device (413) received in the receptacle (391) of the axle sleeve (379) , with the second axle (395) located between the bearing device (413) and the support seat (277) , with the abutting section (411) of the second axle (395) abutting the bearing device (413) , with the bearing device (413) supporting the second axle (395) to pivot relative to the axle sleeve (379) , with the first pivotal mechanism (337) and the second pivotal mechanism (378) supporting the door (295) to pivot relative to the door frame (231) between the closed position and the open position.
The door device as claimed in claim 15, wherein the bearing device (413) includes:

a casing (415) mounted in the receptacle (391) of the axle sleeve (379) , wherein the casing (415) includes a chamber (417) and a through-hole (431) extending from a top end of the casing (415) to the chamber (417) , wherein the casing (415) further includes an annular positioning groove (419) defined in an inner periphery of the chamber (417) ,

a plurality of balls (433) rollingly received in the chamber (417) and surrounding the through-hole (431) ,

a cap (435) rotatably received in the chamber (417) , wherein each of the plurality of balls (433) abuts the cap (435) , and

a positioning ring (437) rotatably received in the chamber (417) , wherein the positioning ring (437) is engaged in the annular positioning groove (419) to position the cap (435) ,

wherein the second axle (395) further includes a positioning section (399) extending from the abutting section (411) , wherein the abutting section (411) of the second axle (395) abuts against the positioning ring (437) ,

wherein the axle sleeve (379) includes a through-hole (393) aligned with the through-hole (431) of the casing (415) , wherein the positioning section (399) extends through the through-hole (393) of the axle sleeve (379) , wherein the positioning section (399) has a distal end located outside of the axle sleeve (379) and engages with a retaining ring, preventing disengagement of the second axle (395) and positioning the bearing device (413) .
The door device as claimed in claim 15, further comprising:

at least one adjusting piece (294) optionally mounted between the second pivotal mechanism (378) and the support seat (277) , wherein a spacing between the door (295) and the track (237) in the vertical direction is reduced in proportion to a number of the at least one adjusting pieces (294) .
The door device as claimed in claim 17, wherein the support seat (277) further includes a supporting portion (291) extending from the mounting portion (279) , wherein the supporting portion (291) includes a coupling hole (293) engaged with the coupling section (397) of the second axle (395) , wherein the at least one adjusting piece (294) is optionally mounted in the coupling hole (293) of the support seat (277) , wherein the coupling section (397) of the second axle (395) abuts against the at least one adjusting piece (294) .
A bearing device for a pivotal mechanism for a door device, comprising:

a casing (415) adapted to be mounted in a receptacle (391) of an axle sleeve (379) , wherein the receptacle (391) is adapted to rotatably receive an axle (395) having a positioning section (399) , wherein the casing (415) includes a chamber (417) and a through-hole (431) extending from a top end of the casing (415) to the chamber (417) , wherein the positioning section (399) of the axle (395) is adapted to extend through the through-hole (431) of the casing (415) , wherein the casing (415) further includes an annular positioning groove (419) defined in an inner periphery of the chamber (417) ；

a plurality of balls (433) rollingly received in the chamber (417) and surrounding the through-hole (431) ；

a cap (435) rotatably received in the chamber (417) , wherein each of the plurality of balls (433) abuts the cap (435) ； and

a positioning ring (437) rotatably received in the chamber (417) , wherein the positioning ring (437) is engaged in the annular positioning groove (419) to position the cap (435) ,

wherein the positioning ring (437) is configured to abut against the axle (395) to support rotation of the axle (395) .