CN111713912A

CN111713912A - Double-layer bed

Info

Publication number: CN111713912A
Application number: CN202010569276.7A
Authority: CN
Inventors: 李泉
Original assignee: Zhejiang Haiyijiao Decoration Furniture Co ltd
Current assignee: Zhejiang Haiyijiao Decoration Furniture Co ltd
Priority date: 2020-06-20
Filing date: 2020-06-20
Publication date: 2020-09-29

Abstract

The application discloses a double-layer bed, which relates to the field of furniture and comprises a bed frame, an upper layer fixed with the bed frame, a lower layer fixed with the bed frame and a ladder; the upper end of the ladder is rotatably connected with the upper berth layer, the ladder comprises a first vertical rod, a second vertical rod and a plurality of transverse rods, the plurality of transverse rods are fixed between the first vertical rod and the second vertical rod, a part of the first vertical rod, which is close to the lower end, is provided with a first sliding groove with a downward opening, and the first sliding groove is internally and slidably connected with a first sliding rod; a second sliding groove with a downward opening is formed in the part, close to the lower end, of the second vertical rod, and a second sliding rod is connected in the second sliding groove in a sliding mode; the bedstead is also provided with a collecting mechanism which can slide the first sliding rod into the first sliding groove and slide the second sliding rod into the second sliding groove; and a limiting assembly capable of limiting the movement of the cross rod is arranged on the lower laying layer. This application has the effect that makes things convenient for personnel to climb the ladder and tighten up the ladder.

Description

Double-layer bed

Technical Field

The application relates to the field of furniture, in particular to a double-layer bed.

Background

The bunk bed is a common furniture in a dormitory, and the main structure of the bunk bed comprises an upper layer, a lower layer, a bed frame and a ladder. Common bunk beds in market all are with the upper end and the upper berth layer fixed connection of ladder, then with the lower extreme and the infraction layer fixed connection of ladder, when personnel will go to spread the layer, go on through the ladder. However, the ladder is usually placed in the vertical direction, and when a person climbs to an upper layer, the person needs to climb vertically upwards, so that the difficulty of climbing the ladder is increased, and improvement is needed.

Disclosure of Invention

In order to solve the problem that makes things convenient for personnel to climb the ladder, the utility model provides a bunk beds adopts following technical scheme:

a double-layer bed comprises a bed frame, an upper layer fixed with the bed frame, a lower layer fixed with the bed frame and a ladder; the upper end of the ladder is rotatably connected with the upper berth layer, the ladder comprises a first vertical rod, a second vertical rod and a plurality of transverse rods, the plurality of transverse rods are fixed between the first vertical rod and the second vertical rod, a part of the first vertical rod, which is close to the lower end, is provided with a first sliding groove with a downward opening, and the first sliding groove is internally connected with a first sliding rod in a sliding manner; a second sliding groove with a downward opening is formed in the part, close to the lower end, of the second vertical rod, and a second sliding rod is connected in the second sliding groove in a sliding mode; the bedstead is also provided with a collecting mechanism which can slide the first sliding rod into the first sliding groove and slide the second sliding rod into the second sliding groove; and a limiting assembly capable of being used for limiting the movement of the cross rod is arranged on the lower laying layer.

Through adopting above-mentioned technical scheme, when personnel want to climb the ladder, rotate the ladder lower extreme to the direction of keeping away from the infraction layer, first slide bar and second slide bar move outside first sliding tray and the second sliding tray under the effort of dead weight for the lower extreme and the ground butt of first slide bar and second slide bar, whole ladder are the slope setting, and the personnel of being convenient for climb the ladder. When the ladder is not needed, the first sliding rod and the second sliding rod can be respectively retracted into the first sliding groove and the second sliding groove, the ladder is placed in a vertical state, and the space is saved.

Preferably, the limit component comprises an ejection spring and a limit piece; the lower layer is provided with a yielding groove for inserting the cross rod, the first vertical rod and the second vertical rod, the lower layer is provided with a third sliding groove for sliding the limiting part, the ejection spring is positioned in the third sliding groove and applies upward ejection force to the limiting part, the limiting part is arranged in a T shape, and the upper end of the limiting part is penetrated out of the third sliding groove and is limited by the cross rod.

Through adopting above-mentioned technical scheme, when the ladder was vertical state and puts, the horizontal pole was located the groove department of stepping down and received the restriction of locating part, and the locating part has restricted the removal of horizontal pole to the stability to the ladder has been realized.

Preferably, the upper end of the limiting part is provided with an inclined plane along the direction of the cross rod inserting abdicating groove.

Through adopting above-mentioned technical scheme, rotating the ladder to the in-process of vertical state from the tilt state, the horizontal pole removes to the inslot of stepping down gradually, the horizontal pole contacts with the inclined plane on the locating part earlier and applys decurrent power to the horizontal pole for locating part downstream and ejecting spring atress compression, know the horizontal pole and pass the locating part after, locating part rebound under ejecting spring's effort, horizontal pole at this moment can with the locating part butt at inslot and one side of stepping down, the setting up of inclined plane has realized need not personnel and has extruded the locating part, be convenient for carry on spacingly to the horizontal pole automatically.

Preferably, the groove of stepping down still supplies the lower extreme of first slide bar and second slide bar to insert, step down tank bottom and first slide bar lower extreme butt in order to restrict the first slide bar roll-off first slide groove of first slide bar, step down tank bottom and second slide bar lower extreme butt in order to restrict second slide bar roll-off second slide groove.

Through adopting above-mentioned technical scheme, when the horizontal pole inserted to the inslot that steps down, first slide bar lower extreme and second slide bar lower extreme all imbed to the inslot that steps down and receive the spacing in groove of stepping down, avoid the arbitrary slip of first slide bar and second slide bar.

Preferably, the take-up mechanism comprises a pull rope assembly and a tightening assembly for tightening the pull rope assembly; the pull rope assembly comprises a first pull rope, a second pull rope and a main pull rope; the first vertical rod is provided with a first through hole, the second vertical rod is provided with a second through hole, one transverse rod is provided with a transverse channel for communicating the second through hole with the first through hole, and the bedstead is provided with a pull rope channel; one end of the first pull rope is fixedly connected with the first sliding rod, and the other end of the first pull rope penetrates through the first through hole and then is inserted into the pull rope channel and is fixedly connected with the main pull rope; one end of a second pull rope is fixedly connected with the second sliding rod, and the other end of the second pull rope sequentially passes through the second through hole, the transverse channel and the first through hole, then is inserted into the pull rope channel and is fixedly connected with the main pull rope; the other end of the main pull rope is connected with the tightening component.

Through adopting above-mentioned technical scheme, as long as take out total stay cord, alright realize simultaneously that first slide bar slides in to first sliding tray, in the second slide bar slides in to the second sliding tray, have the effect of convenient control.

Preferably, when the cross bar is limited by the limiting assembly, the opening of the first through hole for the first pull rope to pass through is aligned with the opening of the pull rope channel for the first pull rope to pass through.

Through adopting above-mentioned technical scheme, when taking total stay cord out, still can keep away from the one end of infraction layer with first montant and rotate to the direction that is close to the infraction layer, and until the ladder is perpendicular setting, through the total stay cord of pulling, can also realize putting perpendicularly of ladder.

Preferably, the tightening assembly comprises an upper fixed disc fixed on the bed frame and a lower rolling disc rotatably connected with the bed frame; the upper fixed disc is positioned above the upper paving layer, and the lower rolling disc is positioned between the lower paving layer and the upper paving layer; one end of the main pull rope, which is far away from the first pull rope and the second pull rope, penetrates out of the pull rope channel, then bypasses the upper fixed disc and is fixedly connected with the lower rolling disc.

Through adopting above-mentioned technical scheme, total stay cord is walked around from the upper fixed disk, and the personnel of the upper berth of being convenient for operate total stay cord, and the people that the lower roll dish was convenient for the infraction layer operates total stay cord, and no matter personnel are located the upper berth layer or the infraction layer, all directly realizable are to the operation of total stay cord.

Preferably, an arc-shaped blocking piece is fixed at the upper end of the upper fixing disc, an arc-shaped channel is formed between the arc-shaped blocking piece and the upper fixing disc, and the main pull rope penetrates through the arc-shaped channel.

Through adopting above-mentioned technical scheme, play the effect of stable total stay cord.

Preferably, one side of the first sliding rod facing the lower paving layer is hinged with a first supporting rod, and a first embedding groove for embedding the first supporting rod is formed in the first sliding rod; one side of the second sliding rod facing the lower laying layer is hinged with a second supporting rod, and a second embedded groove for embedding the second supporting rod is formed in the second sliding rod.

Through adopting above-mentioned technical scheme, when the ladder slope sets up and is used for personnel to scramble, can rotate first bracing piece with this first slide bar roll-off first sliding tray of personnel again for the one end and the ground butt of articulated department are kept away from to first bracing piece plays the effect of strengthening the support. In a similar way, the second sliding rod slides out of the second sliding groove, and then the second supporting rod is rotated, so that one end of the second supporting rod, far away from the hinged position, is abutted against the ground.

In summary, the present application has the following beneficial effects:

1. the ladder can be obliquely placed, the first sliding rod slides out of the first sliding groove, the second sliding rod slides out of the second sliding groove, the lower ends of the first sliding rod and the second sliding rod are abutted to the ground to play a supporting role, and the ladder is oblique and convenient for personnel to climb the ladder;

2. no matter personnel are spread the layer or are spread the layer down, all can pull total stay cord, realize the ladder and become vertical state from the tilt state, have the effect of conveniently packing up the ladder.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present application in a vertical position;

FIG. 2 is an exploded view of a portion of an embodiment of the present application;

FIG. 3 is a schematic sectional view of a partial structure of an embodiment of the present application;

FIG. 4 is a schematic view of the ladder of the embodiment of the present application in an inclined position;

FIG. 5 is an exploded view of a portion of the structure of a first slide bar and a first support bar in an embodiment of the present application;

FIG. 6 is an enlarged view of a portion of the structure at A in FIG. 3;

fig. 7 is a partial structure enlarged schematic view at B in fig. 4.

Reference numerals: 1. a bed frame; 2. spreading layers; 3. laying down layers; 4. a ladder; 5. a limiting component; 6. a first vertical bar; 7. a second vertical bar; 8. a cross bar; 9. ejecting a spring; 10. a limiting member; 11. a yielding groove; 12. a third sliding groove; 13. an inclined surface; 14. a first sliding groove; 15. a first slide bar; 16. a second sliding groove; 17. a second slide bar; 18. a first support bar; 19. a first embedded groove; 20. a second support bar; 21. a second embedded groove; 22. a pull cord assembly; 23. a tightening assembly; 24. a first pull cord; 25. a second pull cord; 26. a main pull rope; 27. a first perforation; 28. a second perforation; 29. a transverse channel; 30. a rope pulling channel; 31. an upper fixed disc; 32. a lower scroll pan; 33. an arc-shaped baffle plate.

Detailed Description

The embodiment of the application discloses a double-layer bed, which comprises a bed frame 1, an upper layer 2 fixed with the bed frame 1, a lower layer 3 fixed with the bed frame 1 and a ladder 4, and is shown in figure 1. The upper end of the ladder 4 is rotatably connected with the upper laying layer 2, and the lower end of the ladder 4 and the lower laying layer 3 are detachably connected and fixed through a limiting component 5.

Referring to fig. 1, the ladder 4 comprises a first vertical bar 6, a second vertical bar 7 and a plurality of cross bars 8; a plurality of cross bars 8 are fixed between the first vertical bar 6 and the second vertical bar 7.

Referring to fig. 1 and 2, the limiting assembly 5 includes an ejecting spring 9 and a limiting member 10. The lower layer 3 is provided with a yielding groove 11 for inserting a cross rod 8, a first vertical rod 6 and a second vertical rod 7, the lower layer 3 is provided with a third sliding groove 12 for sliding the limiting part 10, and the third sliding groove 12 is communicated with the yielding groove 11. The ejecting spring 9 is located in the third sliding groove 12 and applies an upward ejecting force to the limiting member 10, so that the upper end of the limiting member 10 penetrates out of the third sliding groove 12. The limiting member 10 is disposed in a T shape, and the limiting member 10 cannot be completely separated from the third sliding groove 12. When the ladder 4 is vertically placed, the cross bar 8 with the lowest vertical height is positioned at the abdicating groove 11, the side wall of the cross bar 8 is contacted with the side wall of the limiting piece 10, and the limiting piece 10 limits the movement of the cross bar 8, thereby limiting the rotation of the ladder 4. When ladder 4 is rotated to the direction of keeping away from under-laid layer 3 to needs, only need artifical with locating part 10 extrusion down, alright rotate ladder 4, realized 4 lower extremes of ladder and the dismantlement between the under-laid layer 3 and be connected fixedly.

Referring to fig. 1 and 2, the upper end of the stopper 10 is provided with an inclined surface 13 along the direction in which the crossbar 8 is inserted into the receding groove 11. In the process of rotating ladder 4 to the vertical state from the tilt state, horizontal pole 8 removes gradually to the inslot of stepping down 11, horizontal pole 8 earlier with inclined plane 13 contact on the locating part 10 and exert decurrent power to horizontal pole 8, make locating part 10 remove and ejecting spring 9 atress compression, know horizontal pole 8 and pass behind locating part 10, locating part 10 moves up under ejecting spring 9's effort, horizontal pole 8 at this moment can be with locating part 10 butt in the inslot of stepping down 11 and one side, the setting up of inclined plane 13 has realized need not personnel's extrusion locating part 10, be convenient for carry on spacingly to horizontal pole 8 automatically.

Referring to fig. 3, a portion of the first vertical rod 6 near the lower end is provided with a first sliding groove 14 with a downward opening, and a first sliding rod 15 is slidably connected in the first sliding groove 14. The part of the second vertical rod 7 near the lower end is provided with a second sliding groove 16 with a downward opening, and a second sliding rod 17 is connected in the second sliding groove 16 in a sliding way. The lower extreme that lets groove 11 still supplied first slide bar 15 and second slide bar 17 inserts, and the groove 11 bottom of letting is in order to restrict first slide bar 15 roll-off first sliding tray 14 with the butt of first slide bar 15 lower extreme, and the groove 11 bottom of letting is in order to restrict second slide bar 17 roll-off second sliding tray 16 with the butt of second slide bar 17 lower extreme. It should be mentioned that the lower ends of the first sliding rod 15 and the second sliding rod 17 are both arc-shaped ends, so that the first sliding rod 15 and the second sliding rod 17 can rotate out of or into the abdicating groove 11. When the cross rod 8 is inserted into the abdicating groove 11, the lower end of the first sliding rod 15 and the lower end of the second sliding rod 17 are both embedded into the abdicating groove 11 and limited by the abdicating groove 11, so that the first sliding rod 15 and the second sliding rod 17 are prevented from sliding randomly.

Referring to fig. 3 and 4, when a person wants to climb the ladder 4, the lower end of the ladder 4 can be rotated in a direction away from the underlying layer 3, and the first sliding rod 15 and the second sliding rod 17 move out of the first sliding groove 14 and the second sliding groove 16 under the action of the self weight, so that the lower ends of the first sliding rod 15 and the second sliding rod 17 are abutted against the ground, and the whole ladder 4 is arranged in an inclined manner, so that the person can conveniently climb the ladder 4.

Referring to fig. 4 and 5, a first support rod 18 is hinged to one side of the first sliding rod 15 facing the lower layer 3, and a first embedding groove 19 for embedding the first support rod 18 is formed in the first sliding rod 15. One side of the second sliding rod 17 facing the lower layer 3 is hinged with a second supporting rod 20, and a second embedded groove 21 for embedding the second supporting rod 20 is formed in the second sliding rod 17. When the ladder 4 is obliquely arranged and used for climbing people, the first sliding rod 15 of the people can slide out of the first sliding groove 14, and then the first supporting rod 18 is rotated, so that one end, away from the hinged part, of the first supporting rod 18 is abutted to the ground, and the effect of strengthening the support is achieved. Similarly, the second sliding rod 17 slides out of the second sliding groove 16, and then the second supporting rod 20 is rotated, so that one end of the second supporting rod 20, which is far away from the hinge, is abutted to the ground. When the first sliding rod 15 is slid into the first sliding groove 14, the first supporting rod 18 is automatically rotated into the first insertion groove 19 by being restricted by the first vertical rod 6. Similarly, the second support rod 20 is also received in the second insertion groove 21.

Referring to fig. 3 and 4, the bed frame 1 is further provided with a take-up mechanism capable of sliding the first slide bar 15 into the first slide groove 14 and the second slide bar 17 into the second slide groove 16.

Referring to fig. 3 and 6, the takeup mechanism includes a pull cord assembly 22 and a takeup assembly 23 for takeup the pull cord assembly 22. The pull cord assembly 22 includes a first pull cord 24, a second pull cord 25, and a main pull cord 26. The first vertical rod 6 is provided with a first through hole 27, the second vertical rod 7 is provided with a second through hole 28, one cross rod 8 is provided with a transverse channel 29 for communicating the second through hole 28 with the first through hole 27, and the bedstead 1 is provided with a pull rope channel 30. One end of the first pulling rope 24 is fixedly connected with the first sliding rod 15, and the other end of the first pulling rope 24 penetrates through the first through hole 27 and then is inserted into the pulling rope channel 30 and is fixedly connected with the main pulling rope 26. One end of the second pulling rope 25 is fixedly connected with the second sliding rod 17, and the other end of the second pulling rope 25 sequentially passes through the second through hole 28, the transverse channel 29 and the first through hole 27 and then is inserted into the pulling rope channel 30 and is fixedly connected with the main pulling rope 26. The other end of the main pull cord 26 is connected to the take-up assembly 23. As long as the main pulling rope 26 is pulled out, the first sliding rod 15 can slide into the first sliding groove 14, and the second sliding rod 17 can slide into the second sliding groove 16, so that the effect of convenient control can be achieved.

Referring to fig. 1 and 3, it should be mentioned that when the crossbar 8 is limited in position by the limiting component 5, the opening of the first through hole 27 for the first pulling rope 24 to pass through is aligned with the opening of the pulling rope channel 30 for the first pulling rope 24 to pass through, when the main pulling rope 26 is pulled out upwards, the end of the first vertical rod 6 away from the underlying layer 3 is rotated towards the direction close to the underlying layer 3 until the ladder 4 is vertically arranged, and the vertical arrangement of the ladder 4 can be realized by pulling the main pulling rope 26.

Referring to fig. 3 and 6, the tightening assembly 23 includes an upper fixing plate 31 fixed to the frame 1 and a lower rolling plate 32 rotatably coupled to the frame 1. The upper fixed disc 31 is positioned above the upper laying layer 2, the lower rolling disc 32 is positioned between the lower laying layer 3 and the upper laying layer 2, and one end of the main pull rope 26, which is far away from the first pull rope 24 and the second pull rope 25, penetrates through the pull rope channel 30, then bypasses the upper fixed disc 31 and is fixedly connected with the lower rolling disc 32. The general stay cord 26 is walked around from the upper fixed disk 31, and the personnel of being convenient for to spread on the upper berth operate general stay cord 26, and the people of the lower roll dish 32 of being convenient for to lay layer 3 down operates general stay cord 26, and no matter personnel are located and are spread layer 2 or lay layer 3 down, all can directly realize the operation to general stay cord 26. An arc-shaped baffle 33 is fixed at the upper end of the upper fixed disk 31, an arc-shaped channel is formed between the arc-shaped baffle 33 and the upper fixed disk 31, and the main pull rope 26 passes through the arc-shaped channel to be arranged, so that the main pull rope 26 is stabilized.

The concrete main effects are as follows:

when a person wants to climb onto the upper paving layer 2 through the ladder 4, the limiting piece 10 is squeezed downwards, the lower end of the ladder 4 is rotated to a position far away from the lower paving layer 3, the first sliding rod 15 slides out of the first sliding groove 14 and is in contact with the ground, the second sliding rod 17 slides out of the second sliding groove 16 and is in contact with the ground, the first sliding rod 15 and the second sliding rod 17 both play a supporting role, and the ladder 4 is placed in an inclined mode so that the person can conveniently climb onto the upper paving layer 2. When a person lays the layer 2, the person can pull the main pull rope 26 to enable the first sliding rod 15 to move into the first sliding groove 14, the second sliding rod 17 to move into the second sliding groove 16, the cross rod 8 with the lowest vertical height moves to the abdicating groove 11, and finally the whole ladder 4 is vertically placed to achieve the retraction of the ladder 4 and play a role in saving space.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A double-layer bed comprises a bed frame (1), an upper layer (2) fixed with the bed frame (1), a lower layer (3) fixed with the bed frame (1) and a ladder (4); the method is characterized in that: the upper end of the ladder (4) is rotatably connected with the upper laying layer (2), the ladder (4) comprises a first vertical rod (6), a second vertical rod (7) and a plurality of cross rods (8), the cross rods (8) are fixed between the first vertical rod (6) and the second vertical rod (7), a first sliding groove (14) with a downward opening is formed in the part, close to the lower end, of the first vertical rod (6), and a first sliding rod (15) is connected in the first sliding groove (14) in a sliding mode; a second sliding groove (16) with a downward opening is formed in the part, close to the lower end, of the second vertical rod (7), and a second sliding rod (17) is connected in the second sliding groove (16) in a sliding mode; the bedstead (1) is also provided with a collecting mechanism which can slide the first sliding rod (15) into the first sliding groove (14) and slide the second sliding rod (17) into the second sliding groove (16); and a limiting component (5) capable of being used for limiting the movement of the cross rod (8) is arranged on the lower laying layer (3).

2. A bunk bed according to claim 1, wherein: the limiting assembly (5) comprises an ejection spring (9) and a limiting piece (10); it has confession horizontal pole (8), first montant (6) and second montant (7) male groove of stepping down (11) to open on the bed (3), it has confession locating part (10) gliding third sliding tray (12) to open on bed (3) down, and ejecting spring (9) are located third sliding tray (12) and apply upward ejecting power to locating part (10), locating part (10) are the T type setting, locating part (10) upper end is worn out to third sliding tray (12) above and is spacing to horizontal pole (8).

3. A bunk bed according to claim 2, wherein: the upper end of the limiting piece (10) is provided with an inclined surface (13) which is inserted into the abdicating groove (11) along the cross rod (8).

4. A bunk bed according to claim 2, wherein: the lower extreme that lets groove (11) still supplied first slide bar (15) and second slide bar (17) inserts, the first slide bar of restriction first slide bar (15) roll-off (14) are in order to restrict with first slide bar (15) lower extreme butt in groove (11) bottom of letting, and second slide bar (17) lower extreme butt is in order to restrict second slide bar (17) roll-off second slide groove (16) in groove (11) bottom of letting.

5. A bunk bed according to claim 1, wherein: the take-up mechanism comprises a pull rope component (22) and a tightening component (23) for tightening the pull rope component (22); the pull rope assembly (22) comprises a first pull rope (24), a second pull rope (25) and a total pull rope (26); a first through hole (27) is formed in the first vertical rod (6), a second through hole (28) is formed in the second vertical rod (7), a transverse channel (29) which is communicated with the second through hole (28) and the first through hole (27) is formed in one transverse rod (8), and a rope pulling channel (30) is formed in the bedstead (1); one end of the first pull rope (24) is fixedly connected with the first sliding rod (15), and the other end of the first pull rope (24) penetrates through the first through hole (27) and then is inserted into the pull rope channel (30) and is fixedly connected with the main pull rope (26); one end of a second pull rope (25) is fixedly connected with the second sliding rod (17), and the other end of the second pull rope (25) sequentially passes through a second through hole (28), a transverse channel (29) and a first through hole (27), then is inserted into a pull rope channel (30) and is fixedly connected with a main pull rope (26); the other end of the main pull rope (26) is connected with the tightening component (23).

6. A bunk bed according to claim 5, wherein: when the cross rod (8) is limited by the limiting component (5), the opening of the first through hole (27) for the first pull rope (24) to penetrate out is aligned with the opening of the pull rope channel (30) for the first pull rope (24) to penetrate in.

7. A bunk bed according to claim 5, wherein: the tightening component (23) comprises an upper fixed disc (31) fixed on the bedstead (1) and a lower rolling disc (32) rotatably connected with the bedstead (1); the upper fixed disc (31) is positioned above the upper laying layer (2), and the lower rolling disc (32) is positioned between the lower laying layer (3) and the upper laying layer (2); one end of the main pull rope (26), which is far away from the first pull rope (24) and the second pull rope (25), penetrates through the pull rope channel (30), then bypasses the upper fixed disc (31) and is fixedly connected with the lower rolling disc (32).

8. A bunk bed according to claim 7, wherein: an arc-shaped blocking piece (33) is fixed at the upper end of the upper fixing disc (31), an arc-shaped channel is formed between the arc-shaped blocking piece (33) and the upper fixing disc (31), and the total pull rope (26) penetrates through the arc-shaped channel.

9. A bunk bed according to claim 5, wherein: one side of the first sliding rod (15) facing the lower laying layer (3) is hinged with a first supporting rod (18), and a first embedding groove (19) for embedding the first supporting rod (18) is formed in the first sliding rod (15); one side of the second sliding rod (17) facing the lower layer (3) is hinged with a second supporting rod (20), and a second embedded groove (21) for embedding the second supporting rod (20) is formed in the second sliding rod (17).